Patent Publication Number: US-2016244917-A1

Title: Wet paper shape dredging system, wet paper shape product and wet paper-shape product forming method

Description:
CROSS-REFERENCES 
     This application claims the benefits of U.S. Provisional Patent Application No. 62/120,035 filed on Feb. 24, 2015, and Taiwan Patent Applications No. 104134980 filed on Oct. 23, 2015, and No. 104217057 filed on Oct. 23, 2015, the contents of which are incorporated herein by reference in their entirety. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of Invention 
     The present invention relates to a wet paper shape dredging system, a wet paper shape product and a wet paper-shape product forming method, and more particularly to a firming technology of a wet paper product. 
     2. Description of Prior Art 
     In a dredging slurry process of a conventional wet paper shape product forming technology, a slurry tank is used to store paper slurry, contents of the paper slurry comprise materials such as plants chips, various fibers, water, and other materials; with a mold sinking into the slurry tank, and rising from the slurry tank to form a wet pulp body or a paper shape product on the mold. 
     In the prior art, a mold is used to dredge a slurry body of the first paper slurry in the first slurry tank; then, the mold is moved from the first slurry tank, to match with a corresponding mold to make slurry body to form a wet pulp body between the two molds. If a structure of at least one cavity with a tiny width (a sectional width of the cavity is formed in a range 0-8 mm) is desired to be formed, there is usually a disturbing structure (bridging effect) which is formed on an opening near the upward of the cavity, then the cavity fails or is damaged after the processes which follow. Although it is possible to prevent the bridging effect by using fiber with a shorter length, fiber with a shorter length will lead to a huge decrease on the whole strength of the wet pulp or the wet paper shape product, which affects the performance of the final product. 
     Please refer to  FIG. 1 , which shows an illustrative drawing of molding assembly of the prior art. In the prior art, a dredging system  10  comprises a mold  11 . While a wet pulp  14  has a first cavity  12  with a smaller sectional area or deeper depth; the bridge effect is usually generated. When there is no bridging effect, the wet pulp  14  will generate a shape with a first cavity  12  and a second cavity  15 ; however, when there is a bridging effect, the wet pulp  14  will not generate a cavity on the position of the first cavity  12 , but rather will generate a bridge  13  (dashed line). For lacking compression and/or support of the mold  11 , the strength of the position of the first cavity  12  of the wet pulp  14  is insufficient; the wet pulp  14  is very easy to crash to become a defective product after the processes which follow. The bridging effect will severely affect yield rate of the final product. Generally, while a maximum length of a sectional part of a wet pulp layer of the first cavity  12  is 8 mm, the bridging effect will be generated; if the maximum length is less than 6 mm, the bridging effect will certainly be generated. 
     Hence, a dredging system is needed to be provided in order to solve the above issue. 
     SUMMARY OF THE INVENTION 
     In order to solve the above issue, the present invention provides a wet pulp mold which is not only for rapidly dry and form a wet pulp semi products and/or a wet pulp final product, but also for solving the bridging effect and preventing the structure of the wet pulp semi product and/or the wet pulp final product from damage while separating. 
     In order to achieve the above purposes, the present invention comprises a wet paper shape dredging system which comprises at least one slurry tank, at least one molding assembly, and at least one suction device. 
     The at least one slurry tank is used to store paper slurry. The at least one molding assembly is used to dredge up a pulp body contained within the paper slurry to from the at least one slurry tank and make the paper slurry to form at least two wet pulp layers within the at least one molding assembly. The at least one suction device is used to acceleratively drain the water and/or moisture from one of the at least two wet pulp layers. 
     In one preferred embodiment, the at least one slurry tank comprises a first slurry tank and a second slurry tank, the first slurry tank is used to store first paper slurry, the second slurry tank is used to store a second paper slurry. 
     In one preferred embodiment, the first paper slurry and the second paper slurry have the same or different compositions. 
     In one preferred embodiment, a mean fiber length of the first paper slurry and a mean fiber length of the second paper slurry are different from each other. 
     In one preferred embodiment, the at least one molding assembly comprises a first molding assembly; the first molding assembly comprises a first upper mold and a first lower mold. The first lower mold dredges up the pulp body of the paper slurry from the at least one slurry tank, and then the first upper mold and the first lower mold are matched with each other to form the at least two wet pulp layers between the first upper mold and the first lower mold, sequentially. 
     In one preferred embodiment, the at least one molding assembly comprises a first molding assembly. and a second molding assembly. The first molding assembly comprises a first upper mold and a first lower mold. The first lower mold dredges up a pulp body of the first paper slurry from the first slurry tank, and then the first upper mold and the first lower mold are matched with each other to form a first wet pulp layer between the first upper mold and the first lower mold, sequentially. And the first lower molding assembly comprises a second upper mold and a second lower mold. The second lower mold dredges up a pulp body of the second paper slurry from the second slurry tank, and then the second upper mold and second the lower mold are matched with each other to forma second wet pulp layer between the second upper mold and the second lower mold, sequentially. 
     in one preferred embodiment, the at least one molding assembly comprises a first molding assembly and a second molding assembly. The first molding assembly comprises a first upper mold and a first lower mold. The first lower mold dredges up a pulp body of the first paper slurry from the first slurry tank, and then the first upper mold and the first lower mold are matched with each other to form a first wet pulp layer between the first upper mold and the first lower mold, sequentially. And the first lower mold dredges up a pulp body of the second paper slurry from the second slurry tank, then the first upper mold and the first lower mold are matched with each other to form a second wet pulp layer between the first upper mold and the first lower mold, sequentially. 
     In one preferred embodiment, the at least two wet pulp layers have different sizes but are tightly combined. 
     In one preferred embodiment, the at least one molding assembly is able to form the at least one wet pulp layer with at least one wet pulp cavity, the at least one wet pulp cavity of the at least one wet pulp layer has a longest length within a range 0-8 mm on a cross-sectional part thereof. 
     In one preferred embodiment, the longest length is a range 0-6 mm. 
     In one preferred embodiment, a wet paper shape product according to the wet paper shape dredging system as above which comprises the at least two wet pulp layers overlapped and the at least two wet pulp layers shaped in correspondence with each other. 
     In order to achieve the above purposes, the present invention comprises a first slurry tank and a first molding assembly. 
     The first slurry tank is used to store first paper slurry. The first molding assembly comprises a first lower mold and a first upper mold. The first lower mold comprises a first plane. At least one cavity and at least one first through hole are formed on the first plane, the first lower mold is used to dredge up a pulp body contained within the first paper slurry from the first slurry tank. The first upper mold comprises a second plane. At least one protrusion corresponding with the at least one cavity is formed on the second plane. The second plane of the first upper mold is sunk below a liquid surface of the first paper slurry of the slurry tank, to correspondingly match with the first plane of the first lower mold, under the liquid surface of the first paper slurry, so that at least one first wet pulp layer is formed with at least one part of the pulp body of the first paper slurry between the first plane of the first lower mold and the second plane of the first upper mold. 
     In one preferred embodiment, the dredging system further comprises an extension device, which is used to make the second plane of the first upper mold sink below the liquid surface of the first paper slurry. 
     In one preferred embodiment, the dredging system further comprises at least one first suction device, which is used to acceleratively release the water and/or moisture from the at least one first wet pulp layer. 
     In one preferred embodiment, the dredging system further comprises at least one first mesh, which is disposed on the first plane and shaped correspondingly to a shape of the first plane and the at least one cavity. The first mesh is used to leave the at least one first wet pulp layer thereon to prevent the at least one first wet pulp layer from entering the at least one first through hole, in a manner of avoiding choke of the at least one first through hole releasing the water and/or moisture of the at least one first wet pulp layer. 
     In one preferred embodiment, the at least one first wet pulp layer comprises at least two layers which have different sizes but tightly combined with each other. 
     In one preferred embodiment, the at least one first wet pulp layer has at least one first wet pulp cavity formed correspondingly between the first upper mold and the first lower mold, a horizontal cross-sectional width of the at least one first wet pulp cavity of the at least one first wet pulp layer is formed in a range 0-8 mm. 
     In one preferred embodiment, the horizontal cross-sectional width is formed in a range 0-6 mm. 
     In order to achieve the above purposes, the present invention further comprises a paper-shape product, which is made from the at least one first wet pulp layer generated by the wet paper shape dredging system as above. 
     In one preferred embodiment, the at least one first wet pulp layer comprises a plurality of first wet pulp layers overlapped with each other and shaped in correspondence with each other. 
     In order to achieve the above purposes, the present invention provides a wet paper-shape product forming method, comprising: 
     First, a first lower mold is sunk into a first slurry tank, to dredge up a pulp body contained within first paper slurry of the first slurry tank to a first plane of the first lower mold. 
     Then, a second plane of a first upper mold is moved below a liquid surface of the first paper slurry. 
     Then, the second plane of the first upper mold and the first plane of the lower mold are correspondingly matched below the liquid surface of the first paper slurry. 
     Then, at least one part of the pulp body of the first paper slurry forms at least one first wet pulp layer between the first plane of the first upper mold and the second plane of the lower mold. 
     Finally, the wet paper-shape product is formed with the at least one first wet pulp layer. 
     In one preferred embodiment, water and/or moisture contained within the at least one first wet pulp layer is suctioned by the at least one first through hole disposed at the first lower mold and/or at least one second through hole disposed at the first upper mold, by using a first suction device. 
     In one preferred embodiment, after at least one part of the pulp body of the first paper slurry forms at least one first wet pulp layer between the first plane of the first upper mold and the second plane of the lower mold, the method further comprises: moving the first upper mold and the first lower mold above the liquid surface of the first paper slurry; and separating the first upper mold from the first lower mold above the liquid surface of the first paper slurry. 
     In one preferred embodiment, a heat-compression process is performed for the at least one first wet pulp layer. 
     The present invention further provides the at least one molding assembly to perform compressing procedures with multiple dredging process in the at least one slurry tank or to perform compressing procedures below the first paper slurry of the first slurry tank, to prevent generation of the bridging effect and raise the yield rate. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows an illustrative drawing of a prior molding assembly; 
         FIG. 2  shows an illustrative drawing of a wet paper shape dredging system before performed in a mold matching manner, according to a first preferred embodiment of the present invention; 
         FIG. 3  shows an illustrative drawing of the wet paper shape dredging system of  FIG. 2  which is in the mold matching manner; 
         FIG. 4  shows an illustrative drawing of a wet paper shape dredging system before performed in a mold matching manner, according to a second preferred embodiment of the present invention; 
         FIG. 5  shows an illustrative drawing of the wet paper shape dredging system of  FIG. 4  which is in the mold matching manner; 
         FIG. 6  shows a combination illustrative drawing of combination of the first wet pulp layer of  FIG. 3  and the second wet pulp layer of  FIG. 5 ; 
         FIG. 7  shows an illustrative drawing of the wet paper shape dredging system of  FIG. 3  before performed in a second mold matching manner; 
         FIG. 8  shows an illustrative drawing of the wet paper shape dredging system of  FIG. 7  which is in the mold matching manner; 
         FIG. 9  shows an illustrative drawing of a wet paper shape dredging system before performed in a mold matching manner, according to a third preferred embodiment of the present invention; 
         FIG. 10  shows an illustrative drawing of the wet paper shape dredging system of  FIG. 9  which is in the mold matching manner; 
         FIG. 11  shows a stereoscopic illustrative drawing of a first molding assembly of a wet paper shape dredging system according to a fourth preferred embodiment of the present invention; 
         FIG. 12  shows an illustrative drawing of the first molding assembly of the wet paper shape dredging system before performed in a mold matching manner, according to the fourth preferred embodiment of the present invention; 
         FIG. 13  shows an illustrative drawing of the first molding assembly of  FIG. 12  which is in the mold matching manner; 
         FIG. 14  shows a flow diagram of a wet paper-shape product forming method according to the fourth preferred embodiment of the present invention; 
         FIG. 15  shows a flow diagram of a wet paper-shape product forming method according to a fifth preferred embodiment of the present invention; 
         FIG. 16  shows a flow diagram of a wet paper-shape product forming method according to a sixth preferred embodiment of the present invention; and 
         FIG. 17  shows a flow diagram of a wet paper-shape product forming method according to a seventh preferred embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The following description of each embodiment, with reference to the accompanying drawings, is used to exemplify specific embodiments which may be carried out in the present invention. The claims of the present invention are not limited by these embodiments. 
       FIG. 2  shows an illustrative drawing of a wet paper shape dredging system  100  before preformed in a mold matching manner, according to a first preferred embodiment of the present invention. The wet paper shape dredging system  100  comprises a first slurry tank  175 , a first molding assembly  118 , and a first suction device  190 . 
     The first slurry tank  175  is used to store first paper slurry  177 . The first molding assembly  118  comprises a first upper mold  140  and a first lower mold  130 . At least one first protrusion  150  is disposed on a second plane  145  of the first upper mold  140 , and used to correspond with at least one cavity  110  disposed on a first plane  135  of the first lower mold  130 . In the preferred embodiment, taking one larger first protrusion  150 , another smaller first protrusion  150  and two corresponding larger and smaller first cavities  110  for examples, generally, the bridging effect is easily occurred in the smaller first cavity  110 . At least one first mesh  160  is disposed on the at least one first cavity  110  and shaped in corresponding with a shape of the at least one first cavity  110 . The at least one first mesh  160  can be a device having a porous structure. In the preferred embodiment, a first wet pulp layer  170  is shaped with a first wet pulp cavity on the first molding assembly  118  by the first cavity  110 . A longest length of a cross-sectional part of the first wet pulp cavity of the first wet pulp layer  170 , which is less than 8 mm, will be capable of preventing occurrence of the bridging effect thereon. Preferably, the longest length of the cross-sectional part of the first wet pulp cavity of the first wet pulp layer  170 , which is less than 6 mm, is also able to prevent the bridging effect.  FIG. 3  shows an illustrative drawing of the wet paper shape dredging system of  FIG. 2  which is in the mold matching manner. While the first lower mold  130  is moved above a liquid surface of the first paper slurry  177 , the first upper mold  140  and the first lower mold  130  is compressively matched with each other to shape the first wet pulp layer  170 . The at least one first mesh  160  not only makes the first wet pulp layer  170  shaped from the first paper slurry  177 , in correspondence with the at least one first mesh  160 , but also makes the first suction device  190  draining out the unnecessary water from the first wet pulp layer  170  through the at least one first mesh  160 . 
       FIG. 4  shows an illustrative drawing of a wet paper shape dredging system  200  before preformed in a mold matching manner, according to a second preferred embodiment of the present invention. The difference from the first preferred embodiment is using different molding assemblies, slurry tanks and suction devices in the second preferred embodiment. The wet paper shape dredging system  200  comprises a second slurry tank  275 , a second molding assembly  218 , and a second suction device  290 . The second slurry tank  275  is used to store second paper slurry  277 . The first lower molding assembly  218  comprises a second upper mold  240  and a second lower mold  230 . At least one second protrusion  250  is disposed on a second plane  245  of the second upper mold  240 , and is used to correspond with at least one second cavity  210  disposed on a first plane  235  of the second lower mold  230 . In the preferred embodiment, taking one larger second protrusion  250 , another smaller second protrusion  250  and two corresponding larger and smaller second cavities  210  for examples, generally, the bridging effect is easily generated in the smaller second cavity  210 . At least one second mesh  260  is disposed on the at least one second cavity  210  and shaped in corresponding with a shape of the at least one second cavity  210 . The at least one second mesh  260  can be a device having a porous structure. The first paper slurry  177  and the second paper slurry  277  can have the same or different compositions. A mean fiber length of the first paper slurry  177  and a mean fiber length of the second paper slurry  277  are different from each other. 
       FIG. 5  shows an illustrative drawing of the wet paper shape dredging system  200  of  FIG. 4 , which is in the mold matching manner. While the second lower mold  230  is moved above the liquid surface of the second paper slurry  277 , the second upper mold  240  and the second lower mold  230  are compressively matched with each other to shape a second wet pulp layer  174 . The at least one second mesh  260  not only makes the second paper slurry  277  to form the second wet pulp layer  174  with a shape corresponding with the at least one second mesh  260 , but also makes the second suction device  290  draining out the unnecessary water from the second wet pulp layer  174  through the at least one second mesh  260 . 
       FIG. 6  shows an illustrative drawing of combination of the first wet pulp layer  170  of  FIG. 3  and the second wet pulp layer  174  of  FIG. 5 . With the size differences between the first molding assembly  118  and the second molding assembly  218 , the first wet pulp layer  170  and the second wet pulp layer  174  can be completely overlapped with each other. 
       FIG. 7  shows an illustrative drawing of the net paper shape dredging system  100  of  FIG. 3  before performed in a second mold matched manner. Returning  FIG. 3 , after the first wet pulp layer  170  has been formed, the first lower mold  130  is sunk below the liquid surface of the first paper slurry  177  of the first slurry tank  175  again, to perform a second dredging process in the some slurry tank. The present invention does not limit one molding assembly to perform more than twice dredging processes in the same slurry tank. 
       FIG. 8  shows an illustrative drawing of the wet paper shape dredging system  100  of  FIG. 7 , which is in the mold matching manner. While the first lower mold  130  is moved above the liquid surface of the first paper slurry  177  of the first slurry tank  175 , again, the first upper mold  140  and the first lower mold  130  are matched with each other to shape a third wet pulp layer  172 , by making the first paper slurry  177  to form the third wet pulp layer  172  on the first wet pulp layer  170 . Although the third wet pulp layer  172  and the first wet pulp layer  170  have different sizes from each other, they are tightly combined with each other. 
       FIG. 9  shows an illustrative drawing of a wet paper shape dredging system  300  before preformed in a mold matching manner, according to a third preferred embodiment of the present invention. A difference from the first preferred embodiment is: the first molding assembly  118  is further sunk into the second slurry tank  275  in the third preferred embodiment. Following  FIG. 3 , after the first wet pulp layer  170  has been formed, the first lower mold  130  is sunk below the liquid surface of the second paper slurry  277  of the second slurry tank  275  again, to perform a second dredging process in the second slurry tank  275 . The present invention does not limit one molding assembly to perform more than two dredging processes in different slurry tanks. 
       FIG. 10  shows an illustrative drawing of the net paper shape dredging system  300  of  FIG. 9 , which is in the mold matching manner. While the first lower mold  130  is moved above the liquid surface of the second paper slurry  277  of the second slurry tank  275 , again, the first upper mold  140  and the first lower mold  130  are matched with each other to shape a fourth wet pulp layer  173 , by making the second paper slurry  277  to form the fourth wet pulp layer  173  on the first wet pulp layer  170 . Although the fourth wet pulp layer  173  and the first wet pulp layer  170  have different sizes from each other, they are tightly combined with each other. In the present invention, the first suction device  190  and the second suction device  290  are just for description, in actual operation, the first molding assembly  118  can work with the second suction device  290 , and the first lower molding assembly  218  can work with the first suction device  190 . 
     Please refer to  FIGS. 11 and 12 .  FIG. 11  shows a stereoscopic illustrative drawing of a first molding assembly of a net paper shape dredging system  400  according to a fourth preferred embodiment of the present invention.  FIG. 12  shows an illustrative drawing of the first molding assembly of the wet paper shape dredging system  400  before preformed in a mold matching manner, according to the fourth preferred embodiment of the present invention. The wet paper shape dredging system  400  comprises a first slurry tank  175 , a first molding assembly  118 , an extension device  310 , and a first suction device  190 . The first slurry tank  175  is used to store first paper slurry  177 . The first molding assembly  118  comprises a first upper mold  140  and a first lower mold  130 . 
     The first lower mold  130  forms a first plane  135 , at least one first cavity  110  and at least one first through hole  120 . The at least one first cavity  110  and the at least one first through hole  120  are disposed on the first plane  135 . In the preferred embodiment, the at least one first through hole  120  is further disposed around the at least one first cavity  120  or its inner walls, but there is no limit regarding the number of the first cavity  110 , and can be added or decreased by the manufacturers on the demands. A first mesh  160  is disposed on the first plane  135  of the first lower mold  130 ; the mesh number of the first mesh  160  can be added or decreased according to design requirement. In other preferred embodiments, a device with porous structure is able to substitute the first mesh  160 . In other preferred embodiments, overlapped multiple meshes with different mesh numbers are able to substitute the first mesh  160 . 
     The first upper mold  140  forms a second plane  145  corresponding to the first plane  135 , at least one first protrusion  150  corresponding to the at least one first cavity  110 , and at least one second through hole  125 . The at least one first protrusion  150  and the at least one second through hole  125  are located on the second plane  145 . 
     The extension device  310  is used to make the second plane  145  of the first upper mold  140  pulled above or sink below the liquid surface of the first paper slurry  177  of the first slurry tank  175 . While the second plane  145  of the first upper mold  140  is sunk below the liquid surface of the first paper slurry  177 , to match with the first plane  135  of the first lower mold  130  below the liquid surface of the first paper slurry  177 , then at least part of the paper slurry  177  forms a first wet pulp layer  170  between the second plane  145  of the first upper mold  140  and the first plane  135  of the first lower mold  130  (see  FIG. 3 ). On the contrary, while the second plane  145  of the first upper mold  140  is pulled above the liquid surface of the first paper slurry  177 , to separate the second plane  145  of the first upper mold  140  from the first plane  135  of the first lower mold  130  from each other. 
     The first suction device  190 , such as vacuum pump, connects with the at least one second through hole  125  of the first upper mold  140  and the at least one first through hole  120  of the first lower mold  130  by wires, to perform a vacuum suction process for the first upper mold  140  and the first lower mold  130  while the molds matching. However, in different embodiments, it is possible to apply multiple first suction devices to respectively connect with the first upper mold  140  and the first lower mold  130 . 
     Please further refer to  FIGS. 12 and 13 .  FIG. 13  shows an illustrative drawing of the first molding assembly of  FIG. 12 , which is in a mold matching manner. While the extension device  310  makes the second plane  145  of the first upper mold  140  sunk below the liquid surface of the first paper slurry  177  of the first slurry tank  175 , to match with the first plane  135  of the first lower mold  130  below the liquid surface of the first paper slurry  177 , then at least part of the paper slurry  177  forms a first wet pulp layer  170  between the second plane  145  of the first upper mold  140  and the first plane  135  of the first lower mold  130 . 
     Because the first lower mold  130  comprises the at least one first cavity  110 , the first wet pulp layer  170  forms at least one first wet pulp cavity  1702  corresponding to the at least one first cavity  110 . A cross-sectional width of the at least one first wet pulp cavity  1702  is formed in a range 0-8 mm, and preferably, the cross-sectional width is formed in a range 0-6 mm. In other words, since the specific gravity of the fiber of first paper slurry  177  is greater than water and the pressure is higher below the liquid surface, the fiber easily will accumulate in the bottom of the first wet pulp cavity  1702  instead of accumulating on the opening of the first wet pulp cavity  1702 , so that no bridging effect will be occurred therein. 
     In other embodiments, it is possible to form a first wet pulp layer  170  by multiple mold matching processes. In other words, the first wet pulp layer  170  comprises more than two layers which have different sizes from each other but are combined with each other, tightly. 
     The present invention further provides a wet pulp product, which is made from the at least one first wet pulp layer  170  generated by the wet paper shape dredging system of the above embodiments. 
     In the present invention, no matter if a single first molding assembly or multiple first molding assemblies are used to dredge and match in a single first slurry tank or multiple first slurry tanks to form the first wet pulp layer with multiple layers, the multiple layers can be overlapped with each other with corresponding shapes. 
       FIG. 14  shows a flow diagram of a wet paper-shape product forming method according to a fourth preferred embodiment of the present invention. 
     First, performing a step S 01 , a first lower mold  130  is sunk into a first slurry tank  175 , to dredge up a pulp body contained within a part of first paper slurry  177  of the first slurry tank  175  to a first plane  135  of the first lower mold  130  (as shown in  FIG. 2 ). Then, performing a step S 02 , a second plane  145  of a first upper mold  140  is moved below a liquid surface of the first paper slurry  177  of the first slurry tank  175 . Then, performing a step S 03 , the second plane  145  of the first upper mold  140  and the first plane  135  of the lower mold  130  are correspondingly matched with each other, below the liquid surface of the first paper slurry  177  of the first slurry tank  175  (as shown in  FIG. 3 ). Then, performing a step S 04 , at least one part of the pulp body of the first paper slurry  177  forms at least one first wet pulp layer  170  between the first plane  135  of the first upper mold  130  and the second plane  145  of the lower mold  140  (as shown in  FIG. 3 ). Then, performing a step S 05 , the wet paper-shape product is formed with the at least one first wet pulp layer  170 . 
     In comparison with the prior art (matching above the liquid surface), the present invention prevents the bridging effect by matching below the liquid surface. 
       FIG. 15  shows a flow diagram of a wet paper-shape product forming method according to a fifth preferred embodiment of the present invention. The difference between the fifth preferred embodiment and the fourth preferred embodiment is: further performing a step S 06  between the step S 02  and the step S 03 , the step S 06 , water and/or moisture contained within the at least one first wet pulp layer  170  is suctioned by the at least one first through hole  120  disposed at the first lower mold  130  and/or at least one second through hole  125  disposed at the first upper mold  140 , by using a first suction device  190 . 
       FIG. 16  shows a flow diagram of a wet paper-shape product forming method according to a sixth preferred embodiment of the present invention. The difference between the sixth preferred embodiment and the fourth preferred embodiment is: further performing the steps S 07  and S 08  between the step S 02  and the step S 03 , in the step S 07 , the first upper mold  140  and the first lower mold  130  are moved above the liquid surface of the first paper slurry  177 . Then, performing the step S 08 , the first upper mold  140  and the first lower mold  130  are separated from each other above the liquid surface of the first paper slurry  177 . 
       FIG. 17  shows a flow diagram of a wet paper-shape product forming method according to a seventh preferred embodiment of the present invention. The difference between the sixth preferred embodiment and the fourth preferred embodiment is: further performing a step S 09  between the step S 04  and the step S 03 , in the step S 09 , a heat-compression process is performed for the at least one first wet pulp layer  170 . 
     Although the present invention has been disclosed as preferred embodiments, the scope of the claims of the present invention must be defined. The foregoing preferred embodiments are not intended to limit the present invention.