Abstract:
A forming method for a cooling system of a rapid heating mold comprises: preparing a solid cooling waterway object ( 30 ) of a default cooling waterway, the solid cooling waterway object ( 30 ) comprising multiple interconnected attachment portions ( 31 ) and multiple subbranch portions ( 32 ); placing the solid cooling waterway object ( 30 ) into a container ( 40 ) provided with a perfusion groove ( 41 ), and the attaching the attachment portions ( 31 ) onto a groove bottom surface ( 411 ) of the perfusion groove ( 41 ); preparing a perfusion material, and perfusing the perfusion material into the perfusion groove ( 41 ) of the container ( 40 ) to form a mold fixing layer ( 50 ) of the solid cooling waterway object ( 30 ) after cooling; and taking out the mold fixing layer ( 50 ), heating the mold fixing layer ( 50 ), enabling the solid cooling waterway object ( 30 ) to be in a gas state or a liquid state, and discharging the object in the gas state or the liquid state, so as to form a cooling waterway ( 52 ) corresponding to the solid cooling waterway object ( 30 ). Accordingly, a cooling waterway in any form can be formed on the mold upon needs, and the effects that the cooling waterway is easy to treat and the heat dissipation temperature of the mold is uniform are achieved.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    Field of the Invention 
         [0002]    The present invention relates to a rapid heating mold, and more particularly to a forming method for a cooling system of a rapid heating mold. 
         [0003]    Related Prior Art 
         [0004]    When a mold is used for plastic injection molding, aluminum alloy casting, magnesium alloy casting, and etc, rapid heating system of the molds can improve the molding quality and reduce the production cycle. 
         [0005]    For example, when a mold is used in plastic injecting molding, to make the plastic melt flow smoothly into the sprue gate of the mold, and to ensure stable flow and prevent the plastic melt from getting colds and solidifying too early, before mold closing, the rapid heating system should heat the male mold or female mold to a predetermined temperature to make sure that the plastic melt can flow smoothly to the mold cavity, and then dries into a product. 
         [0006]    Similarly, with the cooling system in the mold, the material in the mold cavity can cool down and solidify rapidly, which consequently reduces the production cycle.  FIG. 1  shows a mold (which is an upper mold  10  for example) with a cooling system, wherein the upper mold  10  includes: a mold fixing layer  11 , a mold layer  12  disposed on the mold fixing layer  11 , and a plurality of cooling waterways  111  disposed on the mold fixing layer  11 . The cooling waterways  111  contain cooling liquid, which can carry away the heat of the mold layer  12 , and thus mold layer  12  is cooled down rapidly. However, there are still some disadvantages in actual application: 
         [0007]    The mold fixing layer  11  and the mold layer  12  of the upper mold  10  are all made of steel. Besides, it should form the mold fixing layer  11  first, and then the molding fixing layer  11  should be processed to form the cooling waterways  111 . Therefore, the processing is too difficult, and is unfit for the mold surface  121  of the mold layer  12  which is in the form of a complicated three dimensional geometry or a free form surface. Therefore, it is not easy for the cooling waterways  111  to be located close to the mold surface  121  of the mold layer  12 , resulting in uneven temperature distribution in the surface of the upper mold  10 . 
         [0008]    The present invention has arisen to mitigate and/or obviate the afore-described disadvantages. 
       SUMMARY 
       [0009]    One objective of the present invention is to provide a forming method for a cooling system of a rapid heating mold, which is capable of forming any shaped cooling waterway as desired, and the cooling waterway is located close to the mold surface of the mold layer, achieving the advantages of easy manufacturing of the cooling waterway, and uniform cooling temperature distribution of the mold. 
         [0010]    To achieve the above objective, a forming method for a cooling system of a rapid heating mold, characterized in that comprises: 
         [0011]    a step of preparing including: preparing a solid cooling waterway object of a default cooling waterway, the solid cooling waterway object comprises multiple interconnected attachment portions and multiple subbranch portions; 
         [0012]    a step of placing including: placing the solid cooling waterway object into a container with a perfusion groove, and abutting the attachment portions against a groove bottom surface of the perfusion groove; 
         [0013]    a step of perfusion molding including: preparing a perfusion material, perfusing the perfusion material into the perfusion groove of the container to form a mold fixing layer for covering the solid cooling waterway object after cooling; and 
         [0014]    a step of removing including: taking out the mold fixing layer and processing the mold fixing layer to turn the solid cooling waterway object into liquid or gas which is discharged out of the mold fixing layer, so as to form a cooling waterway corresponding to the solid cooling waterway object in the mold fixing layer. 
         [0015]    Preferably, the solid cooling watery object is made by 3D printing, and there are intervals between the attachment portions of the solid cooling waterway object. 
         [0016]    Preferably, the step of perfusion molding includes: preparing a perfusion material whose melting point is higher than a melting point of the solid cooling waterway object, and the step of removing is to heat the mold fixing layer with a temperature lower than a melting point of the mold fixing layer and higher than the melting point of the solid cooling waterway object. 
         [0017]    Preferably, the step of perfusion molding is to prepare a perfusion material which is less corrosive than the solid cooling waterway object, the step of removing is to soak the mold fixing layer in a corrosive solution, and the corrosive solution does not erode the mold fixing layer but erodes the solid cooling waterway object only. 
         [0018]    Preferably, the attachment portions of the solid cooling waterway object each include cooling grooves, and each of the subbranch portions includes cooling passages which communicate with the cooling grooves, so as to form the cooling waterway. 
         [0019]    To achieve the above objective, a forming method for a cooling system of a rapid heating mold, characterized in that comprises: 
         [0020]    a step of preparing including: preparing a solid cooling waterway object, the solid cooling waterway object comprises multiple interconnected attachment portions and multiple subbranch portions, the attachment portions of the solid cooling waterway object each include cooling grooves, and each of the subbranch portions includes cooling passages which communicate with the cooling grooves, so as to form a cooling waterway; 
         [0021]    a step of placing including: placing the solid cooling waterway object into a container with a perfusion groove, and abutting the attachment portions against a groove bottom surface of the perfusion groove; and 
         [0022]    a step of perfusion molding including: perfusing a perfusion material into the perfusion groove of the container to form a mold fixing layer for covering the solid cooling waterway object after the perfusion material cools down, so that the mold fixing layer is provided with the cooling waterway formed by the cooling passages and the cooling grooves. 
         [0023]    Preferably, the solid cooling watery object is made by 3D printing, and there are intervals between the attachment portions of the solid cooling waterway object. 
         [0024]    To achieve the above objective, a forming method for a cooling system of a rapid heating mold, characterized in that comprises: 
         [0025]    a step of preparing including: preparing a container with a perfusion groove, and a solid cooling waterway object of a default cooling waterway integrally formed in the perfusion groove, the solid cooling waterway object comprises multiple interconnected attachment portions and multiple subbranch portions, and the attachment portions are formed in a groove bottom surface of the perfusion groove; 
         [0026]    a step of perfusion molding including: preparing a perfusion material, and perfusing the perfusion material into the perfusion groove of the container to form a mold fixing layer for covering the solid cooling waterway object after cooling; and 
         [0027]    a step of removing including: processing the mold fixing layer to turn the solid cooling waterway object and the container into a liquid or gas which is discharged out of the mold fixing layer, so as to form a cooling waterway corresponding to the solid cooling waterway object in the mold fixing layer. 
         [0028]    Preferably, the solid cooling watery object and the container are made by 3D printing, and there are intervals between the attachment portions of the solid cooling waterway object. 
         [0029]    Preferably, the step of perfusion molding is to prepare a perfusion material whose melting point is higher than melting points of the container and the solid cooling waterway object, and the step of removing is to heat the mold fixing layer with a temperature lower than the melting point of the mold fixing layer and higher than the melting points of the container and the solid cooling waterway object. 
         [0030]    Preferably, the step of perfusion molding is to prepare a perfusion material which is less corrosive than the solid cooling waterway object and the container, the step of removing is to soak the mold fixing layer in a corrosive solution, and the corrosive solution does not erode the mold fixing layer but erodes the solid cooling waterway object and the container only. 
         [0031]    To achieve the above objective, a forming method for a cooling system of a rapid heating mold, characterized in that comprises: 
         [0032]    a step of preparing including: preparing a container with a perfusion groove, a solid cooling waterway object of a default cooling waterway integrally formed in the perfusion groove, the solid cooling waterway object comprises multiple interconnected attachment portions and multiple subbranch portions, and the attachment portions are formed in the groove bottom surface of the perfusion groove and include cooling grooves, each of the subbranch portions includes cooling passages which communicate with the cooling grooves, so as to form a cooling waterway; 
         [0033]    a step of perfusion molding including: perfusing a perfusion material into the perfusion groove of the container to form a mold fixing layer for covering the solid cooling waterway object after cooling, so that the mold fixing layer is provided with the cooling waterway formed by the cooling passages and the cooling grooves; and 
         [0034]    a step of trimming and forming including: trimming the container, so that the cooling grooves and at least one of the cooling passages in the mold fixing layer communicate with outside. 
         [0035]    Preferably, the solid cooling watery object and the container are made by 3D printing, and there are intervals between the attachment portions of the solid cooling waterway object. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0036]      FIG. 1  is a cross sectional view of a conventional mold with cooling system; 
           [0037]      FIG. 2  is a flow chart showing the steps of a forming method for a cooling system of a rapid heating mold in accordance with a first embodiment of the present invention; 
           [0038]      FIG. 3-1  is a perspective view showing the solid cooling waterway object in the step of preparing of the forming method for cooling system of rapid heating mold in accordance with the first embodiment of the present invention; 
           [0039]      FIG. 3-2  is a partial cross sectional view showing the solid cooling waterway object in the step of preparing of the forming method for cooling system of rapid heating mold in accordance with the first embodiment of the present invention; 
           [0040]      FIG. 3-3  is a perspective view from another angle showing the solid cooling waterway object in the step of preparing of the forming method for cooling system of rapid heating mold in accordance with the first embodiment of the present invention; 
           [0041]      FIG. 4-1  is a perspective view of the forming method for cooling system of rapid heating mold in accordance with the first embodiment of the present invention, showing that the step of placing the solid cooling waterway object in the container; 
           [0042]      FIG. 4-2  is a cross sectional view of the forming method for cooling system of rapid heating mold in accordance with the first embodiment of the present invention, showing that the step of placing the solid cooling waterway object in the container; 
           [0043]      FIG. 5  is an illustrative view of the forming method for cooling system of rapid heating mold in accordance with the first embodiment of the present invention, showing that the step of perfusion molding, wherein a mold fixing layer is formed to cover the solid cooling waterway object; 
           [0044]      FIG. 6-1  is an illustrative view of the forming method for cooling system of rapid heating mold in accordance with the first embodiment of the present invention, showing the step of heating the mold fixing layer to form the cooling waterway; 
           [0045]      FIG. 6-2  is a cross sectional view of the forming method for cooling system of rapid heating mold in accordance with the first embodiment of the present invention, showing the step of heating the mold fixing layer to form the cooling waterway; 
           [0046]      FIG. 7-1  is an exploded view of the forming method for cooling system of rapid heating mold in accordance with the first embodiment of the present invention, showing that the mold fixing layer is separated from the mold layer; 
           [0047]      FIG. 7-2  is an illustrative view of the forming method for cooling system of rapid heating mold in accordance with the first embodiment of the present invention, showing that the mold fixing layer is assembled to the mold layer; 
           [0048]      FIG. 8-1  is a partial exploded view of the forming method for cooling system of rapid heating mold in accordance with the first embodiment of the present invention, showing that the mold fixing layer is separated from the mold layer; 
           [0049]      FIG. 8-2  is an illustrative view of the forming method for cooling system of rapid heating mold in accordance with the first embodiment of the present invention, showing that the mold fixing layer is assembled to the mold layer; 
           [0050]      FIG. 9  is a cross sectional view of the forming method for cooling system of rapid heating mold in accordance with the first embodiment of the present invention, showing that the mold fixing layer is a lower mold; 
           [0051]      FIG. 10-1  is a cross sectional view of the forming method for cooling system of rapid heating mold in accordance with a second embodiment of the present invention, showing that the solid cooling waterway object is provided with two inserting holes; 
           [0052]      FIG. 10-2  is a cross sectional view of the forming method for cooling system of rapid heating mold in accordance with the second embodiment of the present invention, showing that the mold fixing layer is provided with two support portions; 
           [0053]      FIG. 11  is a flow chart showing the steps of a forming method for a cooling system of a rapid heating mold in accordance with a fourth embodiment of the present invention; 
           [0054]      FIG. 12-1  is a cross sectional view showing the solid cooling waterway object in the step of preparing of the forming method for cooling system of rapid heating mold in accordance with the fourth embodiment of the present invention; 
           [0055]      FIG. 12-2  is a cross sectional view showing the step of placing of the forming method for cooling system of rapid heating mold in accordance with the fourth embodiment of the present invention, wherein the solid cooling waterway object is disposed in the container; 
           [0056]      FIG. 12-3  is a cross sectional view showing the step of perfusion molding of the forming method for cooling system of rapid heating mold in accordance with the fourth embodiment of the present invention, wherein the mold fixing layer covers the solid cooling waterway object; 
           [0057]      FIG. 12-4  is a cross sectional view of the forming method for cooling system of rapid heating mold in accordance with the fourth embodiment of the present invention, showing that mold is disposed on the mold fixing layer; 
           [0058]      FIG. 13-1  is an illustrative view of the forming method for cooling system of rapid heating mold in accordance with a fifth embodiment of the present invention, showing that the solid cooling waterway object is provided with two support portions; 
           [0059]      FIG. 13-2  is an illustrative view of the forming method for cooling system of rapid heating mold in accordance with the fifth embodiment of the present invention, showing that the mold fixing layer is provided with two support portions; 
           [0060]      FIG. 14  is an illustrative view of the forming method for cooling system of rapid heating mold in accordance with a sixth embodiment of the present invention; 
           [0061]      FIG. 15  is a flow chart showing the steps of a forming method for a cooling system of a rapid heating mold in accordance with a seventh embodiment of the present invention; 
           [0062]      FIG. 16-1  is a cross sectional view of the step of preparing in accordance with the seventh embodiment of the present invention; 
           [0063]      FIG. 16-2  is a cross sectional view of the step of perfusion molding in accordance with the seventh embodiment of the present invention; 
           [0064]      FIG. 16-3  is a cross sectional view of the step of heating in accordance with the seventh embodiment of the present invention; 
           [0065]      FIG. 17  is a flow chart showing the steps of a forming method for a cooling system of a rapid heating mold in accordance with an eighth embodiment of the present invention; 
           [0066]      FIG. 18-1  is a cross sectional view of the step of preparing in accordance with the eighth embodiment of the present invention; 
           [0067]      FIG. 18-2  is a cross sectional view of the step of perfusion molding in accordance with the eighth embodiment of the present invention; and 
           [0068]      FIG. 18-3  is a cross sectional view of the step of trimming in accordance with the eighth embodiment of the present invention. 
       
    
    
     DESCRIPTION OF REFERENCE NUMERALS 
       [0000]    
       
         
           
               10  upper mold 
               11  mold fixing layer 
               111  cooling waterway 
               12  mold layer 
               121  mold surface 
               21  step of preparing 
               22  step of placing 
               23  step of perfusion molding 
               24  step of removing 
               25  step of trimming and forming 
               30  solid cooling waterway object 
               31  attachment portion 
               311  outer surface 
               312  inserting hole 
               313  shrink end 
               314  cooling groove 
               3141  support portion 
               3142  shrink end 
               32  subbranch portion 
               321  cooling passage 
               33  interval 
               40  container 
               41  perfusion groove 
               411  groove bottom surface 
               50  mold fixing layer 
               51  fixing layer mold surface 
               52  cooling waterway 
               521  cooling groove 
               5211  end portion 
               522  cooling passage 
               523  support portion 
               60  mold layer 
               61  inner mold surface 
           
         
       
     
       DETAILED DESCRIPTION 
       [0102]    Referring to  FIG. 2 , a forming method for a cooling system of a rapid heating mold in accordance with the first embodiment of the present invention comprises: a step  21  of preparing, a step  22  of placing, a step  23  of perfusion molding, and a step  24  of removing. 
         [0103]    As shown in  FIGS. 3-1, 3-2 and 3-3 , the step of preparing includes: preparing a solid cooling waterway object  30  of a default cooling waterway, the solid cooling waterway object  30  comprises multiple interconnected attachment portions  31  and multiple subbranch portions  32 . In this embodiment, the solid cooling watery object  30  is made by 3D printing, which is only for illustrative, not for restrictive purposes. There are intervals  33  between the attachment portions  31  of the solid cooling waterway object  30 , and the outer surfaces  311  of the attachment portions  31  of the solid cooling waterway object  30  are in the mold abutting surface (not shown) of a predetermined shape. 
         [0104]    Referring to  FIGS. 4-1 and 4-2 , the step of placing includes: placing the solid cooling waterway object  30  into a container  40  with a perfusion groove  41 , and abutting the outer surfaces  311  of the attachment portions  31  against the groove bottom surface  411  of the perfusion groove  41 , namely, the groove bottom surface  411  is the mold abutting surface. 
         [0105]    Referring to  FIG. 5 , the step of perfusion molding includes: preparing a perfusion material whose melting point is lower than the melting point of the solid cooling waterway object  30 , perfusing the perfusion material into the perfusion groove  41  of the container  40  to form a mold fixing layer  50  for covering the solid cooling waterway object  30  after cooling, wherein the mold fixing layer  50  further includes a fixing layer mold surface  51  to abut against the groove bottom surface  411  of the perfusion groove  41 . 
         [0106]    Referring to  FIGS. 6-1 and 6-2 , the step of removing includes: taking out the mold fixing layer  50  and heating it with a temperature lower than the melting point of the mold fixing layer  50  and higher than the melting point of the solid cooling waterway object  30 , so that the solid cooling waterway object  30  is heated into a liquid or gas state and discharged out of the mold fixing layer  50 , so as to form a cooling waterway  52  corresponding to the solid cooling waterway object  30  in the mold fixing layer  50 , and the cooling waterway  52  is provided with cooling grooves  521  in the shape of the attachment portions  31  and the cooling passages  522  in the shape of the subbranch portions  32 . 
         [0107]    In this embodiment, as shown in  FIGS. 7-1, 7-2, 8-1 and 8-2 , after the step of removing, the fixing layer mold surface  51  of the mold fixing layer  50  is abutted against an inner mold surface  61  of the mold layer  60 , so that the cooling waterway  52  (the cooling grooves  521 ) of the mold fixing layer  50  runs through the inner mold surface  61  of the mold layer  60 . 
         [0108]    What mentioned above are the main steps of the embodiment of the present invention, for a better understanding of the invention, reference should be made to the following descriptions. 
         [0109]    With the forming method for a cooling system of a rapid heating mold in accordance with the present invention, the path of the cooling waterway  52  of the mold fixing layer  50  can be designed as desired to fit the mold surface of the mold layer  60  which is in the form of a complicated three dimensional geometry or a free form surface. Besides, the path of the cooling waterway  52  of the mold fixing layer  50  can run through the mold layer  60  to allow the waterway  52  to be located close to the mold surface of the mold layer  60 , which achieves the advantages of easy manufacturing of the cooling waterway  52 , and uniform cooling temperature distribution. 
         [0110]    It is to be noted that, in the step  23  of perfusion molding, the mold fixing layer  50  further comprises the fixing layer mold surface  51 , and before the step  24  of heating, the fixing layer mold surface  51  is abutted against the inner mold surface  61  of the mold layer  60 , so that the cooling waterway  52  of the mold fixing layer  50  runs through the inner mold surface  61  of the mold layer  60  after the step  24  of removing. Namely, when the mold fixing layer  50  and the mold layer  60  are fixed to each other before the solid cooling waterway object  30  melts, the waterway  52  can also be located close to the mold surface of the mold layer  60 , which also achieves the same advantages of easy manufacturing of the cooling waterway  52 , and uniform cooling temperature distribution. Of course, the mold layer  60  must have a melting point higher than the melting point of the solid cooling waterway object  30 . 
         [0111]    Referring then to  FIG. 9 , the forming method for a cooling system of a rapid heating mold in accordance with the present invention can also be used when the mold fixing layer  50  is a lower mold and also provided with the cooling waterway  52  and the fixing layer mold surface  51 . 
         [0112]    It is to be noted that the forming method for a cooling system of a rapid heating mold in accordance with the first embodiment of the present invention, in the step  23  of perfusion molding, prepares a perfusion material which is less corrosive than the solid cooling waterway object  30 . In the step  24  of removing, the mold fixing layer  50  is soaked with corrosive solution, and the corrosive solution does not erode the mold fixing layer  50  but erodes the solid cooling waterway object  30  only. In this way, the solid cooling waterway object  30  can also be turned into liquid or gas and discharged out of the mold fixing layer  50 , so as to form the cooling waterway  52  in the shape of the solid cooling waterway object  30  in the mold fixing layer  50 , and the cooling waterway  52  is provided with cooling grooves  521  in the shape of the attachment portions  31  and the cooling passages in the shape of the subbranch portions  32 . 
         [0113]    Moreover, as shown in  FIG. 12-3 , the forming method for a cooling system of a rapid heating mold in accordance with the first embodiment of the present invention, in the step  21  of preparing, the attachment portions  31  of the solid cooling waterway object  30  each include cooling grooves  314 . Each of the subbranch portions  32  includes cooling passages  321  which do or do not communicate with the cooling grooves  314 , so as to form the cooling waterway, which further reduces the material and cost of the solid cooling waterway object  30 . 
         [0114]    Referring to  FIGS. 10-1 and 10-2 , a forming method for a cooling system of a rapid heating mold in accordance with the second embodiment of the present invention is different from the first embodiment in the following aspects: 
         [0115]    In the step of preparing, as shown in  FIG. 10-1 , the attachment portions  31  are each provided with two inserting holes  312 , so that, after the step of heating, as shown in  FIG. 10-2 , the cooling waterway  52  (the cooling grooves  521 ) formed on the mold fixing layer  50  will be formed with two support portions  523  in the shape of the two inserting holes  312 , and the top surface of each of the support portions  523  is abutted against the inner mold surface  61  of the mold layer  60 , so as to enhance the structural strength of the mold layer  60 . 
         [0116]    Referring to  FIGS. 3-1 and 8-1 , a forming method for a cooling system of a rapid heating mold in accordance with the third embodiment of the present invention is different from the first embodiment in the following aspects: 
         [0117]    In the step of preparing, as shown in  FIG. 3-1 , the attachment portions  31  each include two shrink ends  313  which are connected to a corresponding one of the subbranch portions  32 , so that, after the step of heating, as shown in  FIG. 8-1 , the cooling waterway  52  (the cooling grooves  521 ) formed in the shape of the attachment portions  31  will be formed with end portions  5211  in the shape of the shrink ends, and the cooling passages  522  (in the shape of the subbranch portions  32 ) in communication with the cooling grooves  521 . By such arrangements, one of the cooling passages  522  serves as an air inlet, and the other cooling passage  522  serves as an air outlet, so that cooling liquid can be cleaned from one end portion  5211  to the other end portion  5211 , and will finally be discharged via another cooling passage  522 . 
         [0118]    Referring to  FIG. 11 , a forming method for a cooling system of a rapid heating mold in accordance with the fourth embodiment of the present invention comprises the following steps: a step  21  of preparing, a step  22  of placing, and a step  23  of perfusion molding. 
         [0119]    As shown in  FIG. 12-1 , the step of preparing includes: preparing a solid cooling waterway object  30 , the solid cooling waterway object  30  comprises multiple interconnected attachment portions  31  and multiple subbranch portions  32 . The attachment portions  31  of the solid cooling waterway object  30  each include cooling grooves  314 , and each of the subbranch portions  32  includes cooling passages  321  which communicate with the cooling grooves  314 , so as to form the cooling waterway. In this embodiment, the solid cooling watery object  30  is made by 3D printing, and there are intervals  33  between the attachment portions  31  of the solid cooling waterway object  30 . 
         [0120]    Referring to  FIG. 12-2 , the step of placing includes: placing the solid cooling waterway object  30  into a container  40  with a perfusion groove  41 , and abutting the attachment portions  31  against the groove bottom surface  411  of the perfusion groove  41 . 
         [0121]    Referring to  FIG. 12-3 , the step of perfusion molding includes: perfusing perfusion material into the perfusion groove  41  of the container  40  to form a mold fixing layer  50  for covering the solid cooling waterway object  30  after cooling, so that the mold fixing layer  50  is provided with the cooling waterway formed by the cooling passages  321  and the cooling grooves  314 . 
         [0122]    In this embodiment, as shown in  FIGS. 12-4 , the mold fixing layer  50  is taken out from the container  40  after the step of perfusing, the mold fixing layer  50  further includes the fixing layer mold surface  51  which is abutted against the inner mold surface  61  of the mold layer  60 , and the cooling grooves  314  of the mold fixing layer  50  runs through the inner mold surface  61  of the mold layer  60 . 
         [0123]    By such arrangements, the fourth embodiment of the present invention has the same function as the first embodiment, and is also capable of forming any shaped cooling waterway as desired, and the cooling waterway is located close to the mold surface of the mold layer, achieving the advantages of easy manufacturing of the cooling waterway, and uniform cooling temperature distribution of the mold. 
         [0124]    It is to be noted that the difference of the fourth embodiment from the first embodiment is that, in the step preparing, each of the attachment portions  31  of the solid cooling waterway object  30  is provided with the cooling grooves  314 , and each of the subbranch portions  32  of the solid cooling waterway object  30  is provided with the cooling passages  321  which are in communication with the cooling grooves  314  to form the cooling waterway. The fourth embodiment requires no the step of removing, and does not require the melting point of the perfusion material to be lower than the melting point of the solid cooling waterway object  30 , and the perfusion material does not have to be less corrosive than the solid cooling waterway object  30 , which effectively reduces processing procedures. 
         [0125]    In the step of perfusion molding, an open end of each of the cooling passages  321  can be sealed with a detachable plug (not shown) in order to prevent the perfusion material from flowing into the cooling passages  321  of the solid cooling waterway object  30 , and after the step of perfusion molding is done, the plug can be removed. Before the step of perfusion molding, the solid cooling waterway object  30  is disposed in the container  40  with the perfusion groove  41 , and the attachment portions  31  are abutted against the groove bottom surface  411  of the perfusion groove  41 , therefore, the cooling grooves  314  should not be sealed with plugs. 
         [0126]    Referring to  FIGS. 13-1 and 13-2 , a forming method for a cooling system of a rapid heating mold in accordance with the fifth embodiment of the present invention is different from the fourth embodiment in the following aspects: 
         [0127]    As shown in  FIG. 13-1 , in the step of preparing, there are two support portions  3141  in each of the cooling grooves  314  of the attachment portions  31 , so that, after the step of perfusion molding as shown in  FIG. 13-2 , the two support portions  3141  remain in the cooling waterway formed in the mold fixing layer  50 , and the top surface of each of the support portions  3141  is abutted against the inner mold surface  61  of the mold layer  60 , so as to enhance the structural strength of the mold layer  60 . 
         [0128]    Referring to  FIG. 14 , a forming method for a cooling system of a rapid heating mold in accordance with the sixth embodiment of the present invention is different from the fourth embodiment in the following aspects: 
         [0129]    In the step of preparing, the cooling grooves  314  of each the attachment portions  31  each include two shrink ends  3142  which are connected to a corresponding one of the cooling passages  321  of the subbranch portions  32 . By such arrangements, one of the cooling passages  321  serves as an air inlet, and the other cooling passage  321  serves as an air outlet, so that cooling liquid can be cleaned from one shrink end  3142  to the other shrink end  3142 , and will finally be discharged via another cooling passage  321 . 
         [0130]    Referring to  FIG. 15 , a forming method for a cooling system of a rapid heating mold in accordance with the seventh embodiment of the present invention comprises the following steps: a step  21  of preparing, a step  23  of perfusion molding, and a step  24  of removing. 
         [0131]    As shown in  FIG. 16-1 , the step of preparing includes: preparing a container  40  with a perfusion groove  41 , a solid cooling waterway object  30  of a default cooling waterway integrally formed in the perfusion groove  41 . The solid cooling waterway object  30  comprises multiple interconnected attachment portions  31  and multiple subbranch portions  32 , and the attachment portions  31  are formed in the groove bottom surface  411  of the perfusion groove  41 . In this embodiment, the solid cooling watery object  30  and the container are made by 3D printing, and there are intervals  33  between the attachment portions  31  of the solid cooling waterway object  30 . 
         [0132]    Referring to  FIG. 16-2 , the step of perfusion molding includes: preparing a perfusion material whose melting point is higher than the melting points of the container  40  and the solid cooling waterway object  30 , perfusing the perfusion material into the perfusion groove  41  of the container  40  to form a mold fixing layer  50  for covering the solid cooling waterway object  30  after cooling. 
         [0133]    As shown in  FIGS. 16-2 and 16-3 , the step of removing includes: heating the mold fixing layer  50  with a temperature lower than the melting point of the mold fixing layer  50  and higher than the melting points of the container  40  and the solid cooling waterway object  30 , so that the solid cooling waterway object  30  and the container  40  are heated into a liquid or gas state and discharged out of the mold fixing layer  50 , so as to form a cooling waterway  52  corresponding to (or in the shape of) the solid cooling waterway object  30  in the mold fixing layer  50 , and the cooling waterway  52  is provided with cooling grooves  521  in the shape of the attachment portions  31  and the cooling passages  522  in the shape of the subbranch portions  32 . 
         [0134]    By such arrangements, the seventh embodiment of the present invention has the same function as the first embodiment, and is also capable of forming any shaped cooling waterway  52  as desired, and the cooling waterway  52  is located close to the mold surface of the mold layer, achieving the advantages of easy manufacturing of the cooling waterway  52 , and uniform cooling temperature distribution of the mold. 
         [0135]    It is to be noted that the difference of the seventh embodiment from the first embodiment is that the container  40  and the solid cooling waterway object  30  are formed simultaneously in the step preparing  21 , without requiring an additional step of forming the container  40  and the step  22  of placing, which effectively reduces processing procedures. 
         [0136]    Similarly, the step  23  of perfusion molding of the forming method for a cooling system of a rapid heating mold in accordance with the seventh embodiment of the present invention is to prepare a perfusion material which is less corrosive than the solid cooling waterway object  30 . In the step  24  of removing, the mold fixing layer  50  is soaked with corrosive solution, and the corrosive solution does not erode the mold fixing layer  50  but erodes the solid cooling waterway object  30  only. In this way, the solid cooling waterway object  30  can also be turned into liquid or gas and discharged out of the mold fixing layer  50 , so as to form the cooling waterway  52  in the shape of the solid cooling waterway object  30  in the mold fixing layer  50 , and the cooling waterway  52  is provided with cooling grooves  521  in the shape of the attachment portions  31  and the cooling passages in the shape of the subbranch portions  32 . 
         [0137]    Referring to  FIG. 17 , a forming method for a cooling system of a rapid heating mold in accordance with the eighth embodiment of the present invention comprises the following steps: a step  21  of preparing, a step  23  of perfusion molding, and a step  25  of trimming and forming. 
         [0138]    As shown in  FIG. 18-1 , the step of preparing includes: preparing a container  40  with a perfusion groove  41 , a solid cooling waterway object  30  of a default cooling waterway integrally formed in the perfusion groove  41 . The solid cooling waterway object  30  comprises multiple interconnected attachment portions  31  and multiple subbranch portions  32 , and the attachment portions  31  are formed in the groove bottom surface  411  of the perfusion groove  41 . Each of the subbranch portions  32  includes cooling passages  321  which communicate with the cooling grooves  314 , so as to form the cooling waterway  52 . In this embodiment, the solid cooling watery object  30  is made by 3D printing, and there are intervals  33  between the attachment portions  31  of the solid cooling waterway object  30 . 
         [0139]    Referring to  FIG. 18-2 , the step of perfusion molding includes: perfusing the perfusion material into the perfusion groove  41  of the container  40  to form a mold fixing layer  50  for covering the solid cooling waterway object  30  after cooling, so that the mold fixing layer  50  is provided with the cooling waterway formed by the cooling passages  321  and the cooling grooves  314 . 
         [0140]    As shown in  FIGS. 18-2 and 18-3 , the step of trimming and forming includes: trimming the container  40 , so that the cooling grooves  314  and at least one of the cooling passages  321  in the mold fixing layer  50  can communicate with outside. 
         [0141]    By such arrangements, the eighth embodiment of the present invention has the same function as the first embodiment, and is also capable of forming any shaped cooling waterway  52  as desired, and the cooling waterway  52  is located close to the mold surface of the mold layer, achieving the advantages of easy manufacturing of the cooling waterway  52 , and uniform cooling temperature distribution of the mold. 
         [0142]    While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.