Abstract:
The present invention discloses a heat-resistant glue roll structure with discharge through holes, which comprises a shaft sleeved with a high-temperature resistance insulation layer on the surface thereof. Multiple discharge through holes are formed on the high-temperature resistance insulation layer and communicate the outer and inner surface of the high-temperature resistant insulation layer. A heat-resistant soft glue outer layer is also sleeved on the surface of the high-temperature resistant insulation layer. Since the high-temperature resistant insulation layer is provided with the discharge through holes in the present invention, air bubbles generated both between the high-temperature resistant insulation layer and the heat-resistant soft glue outer layer and between the high-temperature resistant insulation layer and the shaft would be squeezed to move towards the discharge through holes and discharged therefrom. No air bubbles would be accumulated in the heat-resistant glue roll structure of the present invention. Therefore, the internal structure thereof is stable in structural connection and the structure has long serving life, high stability and high safety and reliability.

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
       [0001]    This application is a national stage application of PCT Patent Application No. PCT/CN 2015/096197, filed on Dec. 2, 2015, which claims priority to Chinese Patent Application No. 201410801159.3, filed on Dec. 22, 2014, the content of all of which is incorporated herein by reference. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The present invention relates to the field of heat-resistant glue roller technology, and, more particularly, to a heat-resistant glue roll structure with discharge through holes thereof. 
       BACKGROUND 
       [0003]    A laminator is a machine used for plastic packaging, which uses a heat-resistant soft glue roll structure having a certain temperature on surface, to roll on and press a surface of a product for laminating, before bonding it after heating, and a plastic packaging process is then complete. A conventional heat-resistant glue roller of the laminator generally comprises two layers of heat-resistant soft glue layers, for example, a patent with patent number 201010609578.9 has disclosed an electric heating glue roll structure, which comprises a shaft, while a heat-resistant soft glue inner layer is sleeved on a surface of the shaft, and an electric heating wire is arranged on a surface of the heat-resistant soft glue inner layer, followed by covering a layer of heat-resistant soft glue (outer) layer onto the electric heating wire, while between the heat-resistant soft glue inner layer and a heat-resistant soft glue outer layer, it is adhered by a heat-resistant glue. After a long time use of such a heat-resistant glue roller, a plurality of air bubbles may be generated both between the heat-resistant soft glue inner and outer layers and between the heat-resistant soft glue inner layer and the shaft, which are hard to be discharged and may expand after heating, on one hand, it may impact a tightness of bonding between the heat-resistant soft glue inner and outer layers, resulting in separating the heat-resistant soft glue inner and outer layers, and reducing a work reliability of the heat-resistant glue rollers; on other hand, a presence of bubbles may cause a various thickness on surface of the heat-resistant glue roller, which seriously affects a quality of the plastic packaging. 
         [0004]    Therefore, the current technology needs to be improved and developed. 
       BRIEF SUMMARY OF THE DISCLOSURE 
       [0005]    According to the above described defects, the purpose of the present invention is providing a heat-resistant glue roll structure with discharge through holes thereof, in order to solve the technical problems in the prior arts that an existing heat-resistant glue roller is easy to generate air bubbles but hard to discharge them out. 
         [0006]    In order to achieve the above mentioned goals, the technical solution of the present invention to solve the technical problems is as follows: 
         [0007]    a heat-resistant glue roll structure with discharge through holes, comprises a shaft and a heating structure, wherein, the shaft is sleeved with a high-temperature resistant insulation layer on the surface thereof, and a plurality of discharge through holes are arranged in the high-temperature resistant insulation layer, which communicate the outer and inner surfaces of the high-temperature resistant insulation layer; the surface of the high-temperature resistant insulation layer further has a heat-resistant soft glue outer layer sleeved. 
         [0008]    The heat-resistant glue roll structure with discharge through holes, wherein, the plurality of discharge through holes have a hole diameter at an end on the outer surface of the high-temperature resistant insulation layer larger than that at an end on the inner surface of the high-temperature resistant insulation layer. 
         [0009]    The heat-resistant glue roll structure with discharge through holes, wherein, a centerline of the discharge through hole is arranged deviate from a center of the high-temperature resistant insulation layer. 
         [0010]    The heat-resistant glue roll structure with discharge through holes, wherein, the heating structure is an electric heating wire, a spiral mounting groove is set on the surface of the high-temperature resistant insulation layer, and the electric heating wire is wounding and rolling in the spiral mounting groove; a mounting surface is formed between adjacent two spiral mounting grooves, on which the plurality of discharge through holes are arranged. 
         [0011]    The heat-resistant glue roll structure with discharge through holes, wherein, both sides of the spiral mounting groove are set into circular arc faces. 
         [0012]    The heat-resistant glue roll structure with discharge through holes, wherein, the high-temperature resistant insulation layer includes two clamped high-temperature resistant insulators, which has a buckle set on a connecting end face. 
         [0013]    The heat-resistant glue roll structure with discharge through holes, wherein, the high-temperature resistant insulation layer includes two clamped high-temperature resistant insulators, which has a screw fixing pin arranged on an inner surface, while a fixing hole is arranged on the shaft, and the screw fixing pin is inserted into the fixing hole for fixation. 
         [0014]    The heat-resistant glue roll structure with discharge through holes, wherein, a positioning and fastening groove for fixing the heat-resistant soft glue outer layer is arranged on the surface of the high-temperature resistant insulation layer, and the positioning and fastening groove is arranged parallel to a central axis of the high-temperature resistant insulation layer. 
         [0015]    The heat-resistant glue roll structure with discharge through holes, wherein, either end of the shaft further has a fixing sleeve for fastening the two high-temperature resistant insulators. 
         [0016]    Benefits: the present invention provides a plurality of discharge through holes in the high-temperature resistant insulation layer, when air bubbles are generated both between the high-temperature resistant insulation layer and the heat-resistant soft glue outer layer and between the high-temperature resistant insulation layer and the shaft, they would be squeezed or expanded by heat to move towards the plurality of discharge through holes and be discharged therefrom. No air bubbles would be accumulated in the heat-resistant glue roll structure of the present invention. Therefore, the internal structure thereof is stable in structural connection and the structure has long serving life, high stability, high safety and reliability. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0017]      FIG. 1  illustrates an exploded view of a heat-resistant glue roller as provided in the present invention. 
           [0018]      FIG. 2  illustrates a cross-sectional view of a heat-resistant glue roller as provided in the present invention. 
           [0019]      FIG. 3  illustrates a local enlarged schematic view of an inner surface of a high-temperature resistant insulator. 
           [0020]      FIG. 4  illustrates a cutaway view of a discharge through hole with a centerline passing through a center of a high-temperature resistant insulation layer. 
           [0021]      FIG. 5  illustrates a cutaway view of a discharge through hole with a centerline deviate from a center of a high-temperature resistant insulation layer. 
           [0022]      FIG. 6  illustrates an exploded view of a heat-resistant glue roller with a heating structure of an electric heating wire. 
           [0023]      FIG. 7  illustrates a structural schematic view of a heat-resistant glue roller with an electric heating wire lack of a heat-resistant soft glue outer layer. 
           [0024]      FIG. 8  illustrates a local enlarged schematic view of an outer surface of a high-temperature resistant insulation layer with spiral mounting grooves. 
           [0025]      FIG. 9  illustrates a cross-sectional view of a spiral mounting groove. 
       
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
       [0026]    In order to make the purpose, technical solution and the advantages of the present invention clearer and more explicit, further detailed descriptions of the present invention are stated here, referencing to the attached drawings and some preferred embodiments of the present invention. It should be understood that the detailed embodiments of the invention described here are used to explain the present invention only, instead of limiting the present invention. 
       Embodiment 1 
       [0027]    The present embodiment discloses a heat-resistant glue roll structure with a plurality of discharge through holes thereof, shown as  FIG. 1  and  FIG. 2 , it comprises a shaft  100  and a heating structure (not shown in the FIGs.), the shaft  100  is sleeved with a high-temperature resistant insulation layer  200  on the surface thereof, a plurality of discharge through holes  240  are further arranged on the high-temperature resistant insulation layer  200 , which communicates the outer and inner surfaces of the high-temperature resistant insulation layer  200  (referencing to  FIG. 3 ); a surface of the heat-resistant insulation layer  200  has a heat-resistant soft glue outer layer  400  sleeved and bonded by a high-temperature resistant glue. A difference between the present embodiment and a conventional heat-resistant glue roller is, the present embodiment arranges a plurality of discharge through holes  240  in the high-temperature resistant insulation layer  200 , when a plurality of air bubbles are generated both between the high-temperature resistant insulation layer  200  and the heat-resistant soft glue outer layer  400  and between the high-temperature resistant insulation layer  200  and the shaft  100 , they would be squeezed or expanded by heat, during the heat-resistant glue roller working, and would permeate towards the plurality of discharge through holes  240  before being discharged therefrom, without being accumulated in the heat-resistant glue roller. In the present embodiment, using the high-temperature resistant insulation layer  200  instead of any conventional heat-resistant soft glue inner layer is due to a high processing requirement and a high cost of manufacturing a plurality of through holes in the heat-resistant soft glue layer, while a hardness of the heat-resistant soft glue layer is relatively low, and easy to get soften after heating, causing the plurality of discharge through holes easy to get deformed, and a none ideal discharge effect. The high-temperature resistant insulation layer  200  in the present embodiment is a PPS plastic layer. Of course, in other real implementations, the high-temperature resistant insulation layer  200  may also be made by adopting any known other high-temperature resistant insulation materials, such as PAEK, PEEK, PU, PAEEK, and else. 
         [0028]    In the present embodiment, the heating structure is adopting an external radiant heating method, such as a heating tube, a mica sheet or else, the heating tube is fixed on outside of the heat-resistant soft glue outer layer  400 , using heat radiation to heat up the heat-resistant soft glue outer layer  400 . The heat-resistant soft glue outer layer  400  in the present embodiment is a silica gel layer. 
         [0029]    Further, since an efficiency of one time molding of the high-temperature resistant insulation layer  200  and the shaft  100  is very low, thus, a structure of the high-temperature resistant insulation layer  200  is changed, by adopting a high-temperature resistant insulation layer  200  structure in a clamping way, which is composed by two high-temperature resistant insulators  210  in a snap-in way (referencing to  FIG. 1 ). A plurality of fixing and connecting methods on the two high-temperature resistant insulators  210  may be adopted, for example, setting a buckle  220  at a connecting end face of the high-temperature resistant insulator  210  (referencing to  FIG. 3 ), and the two high-temperature resistant insulators  210  are connected by the buckles  220 . Also, for example, arranging a screw fixing pin  230  on an inner surface of the high-temperature resistant insulator  210  (referencing to  FIG. 3 ), and arranging a fixing hole in the shaft (not shown in the FIGs.), while the screw fixing pin  230  is inserted into the fixing hole and gets fixed, followed by tightening with nuts, such a structure may not only ensure that the high-temperature resistant insulation layer  200  and the shaft  100  have no relative rotations occur, also, enough gaps are left between each other for discharge. Of course, in a real implement, the buckle  220  and the screw pin  230  may be set together. In any real implementations, the shaft  100  may be a cylinder, a cuboid, a multilateral pillar or else, the high-temperature resistant insulation layer  200  needs to be set following a detailed shape of the shaft  100 . 
         [0030]    In a real implementation, it is not preferable on a discharge effect of simply setting a plurality of discharge through holes  240  in the high-temperature resistant insulation layer  200 , because the heat-resistant soft glue outer layer  400  could easily block the plurality of discharge through holes  240 , thus, the present invention has studied a plurality of structures of the plurality of discharge through holes, and has found that, when a hole diameter of the discharge through hole at an end on the outer surface of the high-temperature resistant insulation layer is larger than that at an end on the inner surface of the high-temperature resistant insulation layer (as shown in  FIGS. 4 and 5 ), the discharge effect will be pretty good, and not easy to get impacted by the heat-resistant soft layer  400 . Also, in order to reduce a difficulty in machining the plurality of discharge through holes  240 , in any real practices, generally a structure of the discharge through hole as shown in  FIG. 5  is adopted, that is, a centerline of the discharge through hole  240  is set deviate from the center of the high-temperature resistant insulation layer  200 , a hole mold structure for such a discharge through hole structure is simple, owns a high processing efficiency, without affecting the discharge effect. 
       Embodiment 2 
       [0031]    A structure of the heat-resistant glue roller in the present embodiment is basically similar to that in the embodiment 1, except that, the shaft  100  in the present embodiment is set hollow inside, while the heating tube is fixed inside the shaft  100 , and the hollow shaft  100  is heated by the heating tube before conducting heat to the heat-resistant soft glue outer layer  400  for heating; in the present embodiment, the high-temperature resistant insulation layer  200  is a Teflon material layer. 
       Embodiment 3 
       [0032]    The heat-resistant glue roll structure in the present embodiment is basically similar to that in the embodiment 1, except that in the present embodiment, the heating structure is adopting an electric heating wire. Shown as  FIGS. 6-8 , a spiral mounting groove  250  is arranged on the surface of the high-temperature resistant insulation layer  200 , while the electric heating wire  300  is also set in a spiral shape, wounding and rolling in the spiral mounting groove  250  (shown as  FIG. 7 ). Two fixing sleeves  500  are arranged at both ends of the shaft  100 , which may be a steel sleeve, and has two functions, one is used as a conductive part for the electric heating wire  300 , connecting it to a power source before heating it up; another is applied to tightening the high-temperature resistant insulator  210 . The fixing sleeves  500  cover both ends of the high-temperature resistant insulator  210  and connect to the electric heating wire  300 , when mounted to a laminator, the electric heating wire  300  is connected by a carbon brush or other connection methods to the fixing sleeves  500  through a sliding connection, and gets powered up before generating heat, to heat up the heat-resistant soft glue outer layer  400 . In a real implement, either end of the shaft  100  is arranged with a mounting boss  110  (referencing to  FIGS. 6 and 7 ), two high-temperature resistant insulators  210  are clamped on the surface of the shaft  100 , while both ends of the high-temperature resistant insulator  210  extend out of a shaft body  120  of the shaft  100 , and the fixing sleeves  500  are mounted on both ends of the high-temperature resistant insulator  210  (specifically corresponding to a position of the mounting boss  110  near the shaft body  120 ), an effect after installation may be referred to  FIG. 7 . Tiny gaps are existing between the mounting boss  110  (or an outer port of the fixing sleeve  500 ) and the high-temperature resistant insulator  210 , which helps for gas discharge, when an air bubble is squeezed or expanded by heat, it may be discharged from inside out, while air from outside may be hard to enter the inside of the heat-resistant glue roller. 
         [0033]    Shown as  FIG. 8 , a mounting surface  260  is formed between adjacent two spiral mounting grooves  250 , on which the plurality of discharge through holes  240  are arranged. In a real implementation, 3˜8 of the plurality of discharge through holes  240  are generally arranged on the mounting surface  260 , which has generally a width of 2 mm, while an outer diameter of the plurality of discharge through holes  240  is 1.8 mm, and an inner diameter is 1.0 mm, in such an installation method, on one hand, an arrangement of the plurality of discharge through holes  240  will not affect the original heat-resistant glue roll structure, on the other hand, an effect and efficient of gas discharge may be maximally improved. In a real implementation, both sides of the spiral mounting grooves  250  are set into circular arc faces  251  (referencing to  FIG. 9 ), such an arrangement of a structure of circular arc face  251 , on one hand, may improve an efficient of heat transfer, on the other hand, may be more convenient for gas discharge (which is because the electric heating wire  300  is the easiest place to generate air bubbles, while setting the circular arc face  251  may increase a contact surface between both sides of the spiral mounting grooves  250 , which is more helpful for the air bubbles to permeate to the plurality of discharge through holes on both sides). 
         [0034]    In a real implementation, a positioning and fastening groove  270  for fixing the heat-resistant soft glue outer layer  400  is arranged on the surface of the high-temperature resistant insulation layer  200  (referencing to  FIG. 8 ), and the positioning and fastening groove  270  is arranged parallel to a central axis of the high-temperature resistant insulation layer. When bonding the heat-resistant soft glue outer layer  400  and the high-temperature resistant insulation layer  200  together, part of an embossment in the inner surface of the heat-resistant soft glue outer layer  400  will be trapped into the positioning and fastening groove  270 , which not only improves a stability of a combination of the two, but also ensures the two hard to occur any relative movements, even after the glue is aging, thus a reliability of the heat-resistant glue roller is improved, and a serving life is extended. 
         [0035]    It should be understood that, the application of the present invention is not limited to the above examples listed. Ordinary technical personnel in this field can improve or change the applications according to the above descriptions, all of these improvements and transforms should belong to the scope of protection in the appended claims of the present invention.