Patent Publication Number: US-2023141881-A1

Title: Fixture for heat pressing process of manufacturing airbag

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This Non-provisional application claims priority under 35 U.S.C. § 119(a) on Patent Application No(s). 110142042 filed in Taiwan, Republic of China on Nov. 11, 2021, the entire contents of which are hereby incorporated by reference. 
     BACKGROUND 
     Technology Field 
     The present disclosure relates to a fixture for heat pressing process and, in particular, to a fixture for heat pressing process that is applied to a hot pressing machine for hot pressing two elastic plastic pieces so as to manufacture a customized airbag. 
     Description of Related Art 
     The applications and requirements for airbags have increased in recent years. Airbags are mainly used in applications such as shoes, somatosensory devices, pneumatic devices, medical products contacting body, and the likes. However, most of the conventional heat pressing processes are unable to flatten and hot press plastic materials, and are mainly used for mass production of simple airbags. Therefore, the airbags are usually made by direct contact process or utilizing molds, so it is difficult to manufacture the customized airbags of various sizes and complex shapes. 
     One of the conventional mechanisms used in the heat pressing process utilizes a ball heating head. However, the lubricating oil must be added continuously during the process. Otherwise, the ball will get stuck after the lubricating oil has been evaporated by high temperature treatment, and the friction between the heating head and the subjected plastic piece will increase, which may cause the breaking of the plastic piece. Another mechanism used in the heat pressing process utilizes a laser cutting machine to sinter the plastic pieces, thereby causing different plastic pieces to be cemented. However, the applied laser may cause the warps of plastic pieces and generate toxic exhaust gas. 
     Therefore, it is desired to provide a fixture for heat pressing process that can be applied to a hot pressing mechanism without utilizing the conventional ball heat head or the conventional laser cutting machine, thereby preventing the breaking or warp of plastic pieces or the generation of toxic exhaust gas. Moreover, it is also desired to provide a fixture for heat pressing process that can be applied to manufacture the customized airbags of various sizes and complex shapes. 
     SUMMARY 
     This disclosure is to provide a fixture for heat pressing process that can be applied to various hot pressing mechanisms for manufacturing the customized airbags of various sizes and complex shapes, and preventing the breaking or warp of plastic pieces or the generation of toxic exhaust gas. 
     To achieve the above, a fixture for heat pressing process of this disclosure is applied to a hot pressing machine for hot pressing two elastic plastic pieces so as to manufacture an airbag, wherein the two elastic plastic pieces are disposed between the fixture and the hot pressing machine. The fixture comprises a first frame, a second frame, and a flexible heat blocking layer. The first frame comprises two first brackets, and the first brackets are separated from each other with a first distance. The second frame comprises two second brackets, and the second brackets are separated from each other with a second distance. The second brackets are located at two ends of the first brackets, respectively. The flexible heat blocking layer is fixed by the first frame and/or the second frame. 
     In one embodiment, each of the first brackets comprises a first groove, each of the second brackets comprises a second groove, the flexible heat blocking layer comprises at least one first through hole, and the at least one first through hole is arranged corresponding to the first grooves and/or the second grooves. 
     In one embodiment, the fixture further comprises at least one first screw and at least one first nut, and the at least one first screw passes through the first groove and the second groove, and is screwed to the at least one first nut. 
     In one embodiment, when the first through hole is disposed corresponding to the first groove and the second groove, the at least one first screw further passes through the first through hole, the first through hole is located between the first groove and the second groove, and the flexible heat blocking layer is located between the first frame and the second frame. 
     In one embodiment, the fixture further comprises at least one second screw and at least one second nut. When the first through hole is disposed corresponding to the first groove, the at least one second screw passes through the first groove and the first through hole and is screwed to the at least one second nut. Otherwise, when the first through hole is disposed corresponding to the second groove, the at least one second screw passes through the second groove and the first through hole and is screwed to the at least one second nut. 
     In one embodiment, the fixture further comprises two holding members. When the first through holes are disposed corresponding to the first grooves, the holding members are arranged on the second brackets, respectively. In another case, when the first through holes are disposed corresponding to the second grooves, the holding members are arranged on the first brackets, respectively. The holding members are configured to hold two opposite sides of the flexible heat blocking layer. 
     In one embodiment, the first brackets are arranged in parallel, and the second brackets are arranged in parallel. 
     In one embodiment, the second brackets are mirrored and symmetrically arranged at two ends of the first brackets with respect to a plane, which is perpendicular to the first brackets and passing through centers of the first brackets. 
     In one embodiment, the first frame further comprises two third brackets, the second frame further comprises two fourth brackets, the third brackets are disposed corresponding to the second brackets, and the fourth brackets are disposed corresponding to the first brackets. Two ends of the first brackets are fixed to two ends of the third brackets so as to form the first frame, two ends of the second brackets are fixed to two ends of the fourth brackets so as to form the second frame, and the first frame is fixed to the second frame. 
     In one embodiment, the first brackets and the third brackets of the first frame are integrally formed as one piece, and the second brackets and the fourth brackets of the second frame are integrally formed as one piece. 
     In one embodiment, the first frame further comprises at least one second through hole, the second frame further comprises at least one third through hole, the flexible heat blocking layer comprises at least one first through hole, and the at least one first through hole, the at least one second through hole and the at least one third through hole are disposed corresponding to each other. 
     In one embodiment, the fixture further comprises at least one first screw and at least one first nut, and the at least one first screw passes through the at least one second through hole, the at least one first through hole and the at least one third through hole, and is screwed to the at least one first nut. 
     In one embodiment, the first brackets and the second brackets together defines an opening, and a shape of the opening corresponds to a working surface of the hot pressing machine, so that the first frame or the second frame is directly fixed on the working surface through the opening. 
     In one embodiment, the flexible heat blocking layer is made of a cloth material, and the cloth material comprises Teflon and/or a glass fiber material. 
     In one embodiment, the fixture further comprises at least one fixing portion disposed on the first frame and/or the second frame, and the fixing portion is in contact with the hot pressing machine for fixing the fixture on the hot pressing machine. 
     In one embodiment, the at least one fixing portion comprises at least two protrusions, which are disposed at two opposite positions on the first brackets and/or the second brackets. 
     As mentioned above, the fixture for heat pressing process of this disclosure can be applied to various kinds of hot pressing mechanisms for manufacturing customized airbags of various sizes and complex shapes, and preventing the breaking or warp of plastic pieces or the generation of toxic exhaust gas. In addition, the fixture for heat pressing process of this disclosure has a simple structure, so that it can be quickly assembled and adjusted, and is suitable for the working surfaces of various kinds of hot pressing mechanisms. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The disclosure will become more fully understood from the detailed description and accompanying drawings, which are given for illustration only, and thus are not limitative of the present disclosure, and wherein: 
         FIG.  1 A  is a schematic diagram showing a fixture for heat pressing process according to a first embodiment of this disclosure; 
         FIG.  1 B  is an exploded view of the fixture as shown in  FIG.  1 A ; 
         FIG.  1 C  is a top view of the fixture of  FIG.  1 A ; 
         FIG.  1 D  is a schematic diagram showing a transform aspect of the fixture of  FIG.  1 A , wherein the relative positions of the first brackets and the second brackets are changed from  FIG.  1 C ; 
         FIG.  2    is an exploded view of the fixture for heat pressing process according to a second embodiment of this disclosure; 
         FIG.  3 A  is a schematic diagram showing a fixture for heat pressing process according to a third embodiment of this disclosure; 
         FIG.  3 B  is an exploded view of the fixture as shown in  FIG.  3 A ; 
         FIG.  4    is a schematic diagram showing the fixture of the first embodiment applied to a hot pressing machine; 
         FIG.  5    is a schematic diagram showing the fixture of the third embodiment applied to a hot pressing machine; 
         FIG.  6 A  is a sectional view of the fixture and the hot pressing head of the hot pressing machine as shown in  FIG.  4  or  5   , wherein the hot pressing head is applied to perform a heat pressing process; and 
         FIG.  6 B  is a sectional view of a fixture and a hot pressing head of a hot pressing machine according to another embodiment of this disclosure, wherein the hot pressing head is applied to perform a heat pressing process. 
     
    
    
     DETAILED DESCRIPTION OF THE DISCLOSURE 
     The present disclosure will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements. 
     To be noted, this disclosure provides multiple embodiments, and each of the embodiments represents a combination of the elements disclosed in the present invention under a certain possible circumstance. However, the present invention should still include all possible combinations of the disclosed elements. Therefore, if one embodiment includes elements A, B, and C, and the second embodiment includes elements B and D, even if it is not explicitly disclosed, the present invention should be understood to include any of the combinations of A, B, C, and/or D. 
       FIG.  1 A  is a schematic diagram showing a fixture for heat pressing process according to a first embodiment of this disclosure,  FIG.  1 B  is an exploded view of the fixture as shown in  FIG.  1 A ,  FIG.  4    is a schematic diagram showing the fixture of the first embodiment applied to a hot pressing machine, and  FIG.  6 A  is a sectional view of the fixture and the hot pressing head of the hot pressing machine as shown in  FIG.  4  or  5   , wherein the hot pressing head is applied to perform a heat pressing process. Referring to  FIGS.  1 A,  1 B,  4  and  6 A , in this embodiment, the fixture  1   a  for heat pressing process is applied to a hot pressing machine  2   a  for hot pressing two elastic plastic pieces  3 . The two elastic plastic pieces  3  are disposed between the fixture  1   a  and the hot pressing machine  2   a . The hot pressing machine  2   a  includes a working surface  21  and a hot pressing head  22 . The two elastic plastic pieces  3  (two layers) are disposed on the working surface  21  of the hot pressing machine  2   a , and then the fixture  1   a  is placed on the elastic plastic pieces  3 , followed by a heat pressing process. The hot pressing machine can be, for example but not limited to, a 3D printer, a CNC machine, or any of other mechanisms known to those with ordinary knowledge in the art that can be used to directly heat the elastic plastic pieces  3  with a hot pressing head so as to manufacture an airbag. 
     In this embodiment, the fixture  1   a  includes a first frame  11 , a second frame  12 , and a flexible heat blocking layer  13 . The first frame  11  comprises two first brackets  111 , and the first brackets  111  are separated from each other with a first distance D 1 . The second frame  12  comprises two second brackets  121 , and the second brackets  121  are separated from each other with a second distance D 2 . The second brackets  121  are located at two ends of the first brackets  111 , respectively. The flexible heat blocking layer  13  is fixed by the first frame  11  and/or the second frame  12 . This method and operation for fixing the flexible heat blocking layer  13  by the first frame  11  and/or the second frame  12  will be described in detail hereinafter. 
     In this embodiment, each of the two first brackets  111  comprises a first groove G 1 , each of the two second brackets  121  comprises a second groove G 2 , the flexible heat blocking layer  13  comprises at least one first through hole H 1 , and the first through hole H 1  is arranged corresponding to the first grooves G 1  and/or the second grooves G 2 . Particularly, in this embodiment, the flexible heat blocking layer  13  includes four first through hole H 1 , wherein two first through hole H 1  are arranged corresponding to one of the second grooves G 2 , and the other two first through hole H 1  are arranged corresponding to the other one of the second grooves G 2 . To be noted, the above arrangement is for an illustration only, and is not to limit this disclosure. In other embodiments, the first through holes H 1  can be arranged corresponding to the first grooves G 1 , or be arranged corresponding to both of the first grooves G 1  and the second grooves G 2 . Besides, the amount of the first through holes H 1  can be changed based on the requirement of users, and this disclosure is not limited thereto. 
     In this embodiment, the fixture  1   a  further comprises at least one first screw S 1  and at least one first nut N 1 . The first screw S 1  passes through the first groove G 1  and the second groove G 2 , and is screwed to the first nut N 1 . Particularly, the fixture  1   a  of this embodiment includes four first screws S 1  and four corresponding first nuts N 1 . To be noted, the amounts of the first screws S 1  and the first nuts N 1  can be changed based on the requirement of users as long as the first brackets  111  and the second brackets  121  can be firmly fixed. This disclosure is not limited thereto. 
     In this embodiment, when the first through holes H 1  only correspond to the first grooves G 1  or the second grooves G 2 , the fixture  1   a  further comprises at least one second screw S 2  and at least one second nut N 2 . When the first through holes H 1  are disposed corresponding to the first grooves G 1 , each of the second screws S 2  passes through the corresponding first groove G 1  and the corresponding first through hole H 1 , and is screwed to the corresponding one of the second nuts N 2 . Otherwise, when the first through hole H 1  is disposed corresponding to the second groove G 2 , each of the second screws S 2  passes through the corresponding second groove G 2  and the corresponding first through hole H 1 , and is screwed to the corresponding one of the second nuts N 2 . Particularly, the fixture  1   a  of this embodiment includes four second screws S 2  and four corresponding second nuts N 2 , and two opposite sides of the flexible heat blocking layer  13  corresponding to the second brackets  121  are fixed to the two brackets  121 , respectively, by the second screws S 2  and the second nuts N 2 . To be noted, the amounts of the second screws S 2  and the second nuts N 2  can be changed based on the requirement of users. In other embodiments, the flexible heat blocking layer  13  can be fixed to the first brackets  111 . Any configuration is acceptable as long as the amounts of the second screws S 2  and the second nuts N 2  match the amount of the first through holes H 1 , and the flexible heat blocking layer  13  can be firmly fixed on the first brackets  111  and/or the second brackets  121 . This disclosure is not limited thereto. 
     In this embodiment, the fixture  1   a  further comprises two holding members  14 . When the first through holes H 1  are disposed corresponding to the first grooves G 1 , the holding members  14  are arranged on the second brackets  121 , respectively. In another case, when the first through holes H 1  are disposed corresponding to the second grooves G 2 , the holding members  14  are arranged on the first brackets  111 , respectively. The holding members  14  are configured to hold two opposite sides of the flexible heat blocking layer  13 . Herein, the holding members  14  are, for example, disposed on the first brackets  111 . The two holding members  14  are arranged on the two first brackets  111 , respectively, and each holding member  14  is arranged adjacent to the first groove G 1  of the corresponding first bracket  111  and extends toward the direction away from the first groove G 1  (or toward the other holding member  14 ). Accordingly, the two holding members  14  are located opposite to each other and are configured to hold and fix the opposite sides of the flexible heat blocking layer  13 . In this case, two opposite sides of the flexible heat blocking layer  13 , which are configured with the first through holes H 1 , are fixed to the second brackets  121 , and the other two opposite sides thereof are held and fixed by the holding members  14  on the first brackets  111 . Of course, in other embodiments, two opposite sides of the flexible heat blocking layer  13 , which are configured with the first through holes H 1 , can be fixed to the first brackets  111 , and the other two opposite sides thereof can be held and fixed by the holding members  14  on the second brackets  121 . 
       FIG.  1 C  is a top view of the fixture  1   a  of  FIG.  1 A . Referring to  FIG.  1 C , in this embodiment, the first brackets  111  are arranged in parallel, and the second brackets  121  are arranged in parallel. Specifically, the second brackets  121  are mirrored and symmetrically arranged at two ends of the first brackets  111  with respect to a plane P, which is perpendicular to the first brackets  111  and passing through centers of the first brackets  111 . In this aspect, the first brackets  111  are arranged in parallel, the second brackets  121  are arranged in parallel, and the first brackets  111  are perpendicular to the second brackets  121 , thereby forming the rectangular or square fixture  1   a . In another aspect, the first brackets  111  can be not parallel to each other, the second brackets  121  can be not parallel to each other, and the first brackets  111  can be not perpendicular to the second brackets  121 . For example, the first brackets  111  and the second brackets  121  can be assembled to form a rhombus shape, a trapezoid shape, or any of other conventional quadrilateral shapes, as long as the fixture  1   a  can correspond to the working surface of the hot pressing machine and fix to the hot pressing machine. This disclosure is not limited thereto. 
       FIG.  1 D  is a schematic diagram showing a transform aspect of the fixture  1   a  of  FIG.  1 A , wherein the relative positions of the first brackets  111  and the second brackets  121  are changed from  FIG.  1 C . Referring to  FIG.  1 C  in view of  FIG.  1 D , the difference between  FIG.  1 C  and  FIG.  1 D  is the fixing positions of the first screws S 1  and the first nuts N 1 . As shown in  FIG.  1 C , each first screw S 1  and the corresponding first nut N 1  are screwed at the cross position of one end of one first groove G 1  and one end of the corresponding second groove G 2 . As shown in  FIG.  1 D , each first screw S 1  and the corresponding first nut N 1  are screwed at the cross position of one first groove G 1  and the corresponding second groove G 2  (other than the ends of the first groove G 1  and the second groove G 2 ). The fixing positions of the first screws S 1  and the first nuts N 1  with respect to the cross positions of the first grooves G 1  and the second grooves G 2  can be adjusted to match the working surface of the heat pressing machine. If the working surface is smaller, the fixing positions can be away from the ends of the first grooves G 1  and the second grooves G 2 . Otherwise, if the working surface is larger, the fixing positions can be close to the ends of the first grooves G 1  and the second grooves G 2 . Accordingly, the fixture  1   a  can be applied to various hot pressing machines with the working surfaces of different sizes. 
       FIG.  2    is an exploded view of the fixture  1   b  for heat pressing process according to a second embodiment of this disclosure. The fixture  1   b  of this embodiment is similar to the fixture  1   a  of the first embodiment, and the difference therebetween is the positions of the first through holes H 1 . Referring to  FIG.  2   , in the second embodiment, each of the first through holes H 1  of the flexible heat blocking layer  13  of the fixture  1   b  is arranged corresponding to one corresponding first groove G 1  and one corresponding second groove G 2 . Accordingly, each first screw S 1  can pass through the corresponding first through hole H 1 , and each through hole H 1  is located between the corresponding first groove G 1  and the corresponding second groove G 2 , so that the flexible heat blocking layer  13  can be arranged between the first frame  11  and the second frame  12 . 
       FIG.  3 A  is a schematic diagram showing a fixture  1   c  for heat pressing process according to a third embodiment of this disclosure, and  FIG.  3 B  is an exploded view of the fixture  1   c  as shown in  FIG.  3 A . The fixture  1   c  of the third embodiment is similar to the fixture  1   b  of the second embodiment. Unlike the second embodiment, the first frame  11  of the fixture  1   c  further comprises two third brackets  112 , and the second frame  12  of the fixture  1   c  further comprises two fourth brackets  122 . The third brackets  112  are disposed corresponding to the second brackets  121 , and the fourth brackets  122  are disposed corresponding to the first brackets  111 . Two ends of the first brackets  111  are fixed to two ends of the third brackets  112  so as to form the first frame  11 , and two ends of the second brackets  121  are fixed to two ends of the fourth brackets  122  so as to form the second frame  12 . The first frame  11  is fixed to the second frame  12 . Herein, the first brackets  111  and the third brackets  112  can be fixed to each other by screwing, engaging or hooking, or any of other conventional methods known to those with ordinary knowledge in the art. The fixing methods of the first frame  11  and the second frame  12  will be described in detail hereinafter. 
     In this embodiment, the first brackets  111  and the third brackets  112  of the first frame  11  are integrally formed as one piece, and the second brackets  121  and the fourth brackets  122  of the second frame  12  are integrally formed as one piece. Particularly, the first brackets  111  are perpendicular to the third brackets  112 , and the second brackets  121  are perpendicular to the fourth brackets  122 , so that the first frame  11  and the second frame  12  can be formed in a rectangular shape or a square shape. In other aspects, the first brackets  111  can be not parallel to the third brackets  112 , and the second brackets  121  can be not parallel to the fourth brackets  122 . For example, the first brackets  111  and the third brackets  112  can be assembled to form a rhombus shape, or any of other conventional quadrilateral shapes, and the second brackets  121  and the fourth brackets  122  can be assembled to form a rhombus shape, or any of other conventional quadrilateral shapes, as long as the fixture  1   c  can correspond to the working surface of the hot pressing machine and fix to the hot pressing machine. This disclosure is not limited thereto. 
     In this embodiment, the first frame  11  further comprises at least one second through hole H 2 , the second frame  12  further comprises at least one third through hole H 3 , the flexible heat blocking layer  13  comprises at least one first through hole H 1 , and the at least one first through hole H 1 , the at least one second through hole H 2  and the at least one third through hole H 3  are disposed corresponding to each other. Particularly, the fixture  1   c  includes four second through holes H 2 , four first through holes H 1 , and four third through holes H 3 , which are disposed corresponding to each other. In other embodiments, the amounts of the first through holes H 1 , the second through holes H 2  and the third through holes H 3  can be changed based on the requirement of users as long as the amounts thereof are equal. 
     In this embodiment, the fixture  1   c  further comprises at least one first screw S 1  and at least one first nut N 1 , and the first screw S 1  passes through the second through hole H 2 , the first through hole H 1 , and the third through hole H 3 , and is screwed to the first nut N 1 . Particularly, the fixture  1   c  includes four first screws S 1  and four first nuts N 1 , which fix the first frame  11  and the second frame  12  through the four second through holes H 2 , the four first through holes H 1 , and the four third through holes H 3 . In other embodiments, the amounts of the first through holes H 1 , the second through holes H 2 , the third through holes H 3 , the first screws S 1  and the first nuts N 1  can be changed based on the requirement of users as long as the amounts thereof are equal and the flexible heat blocking layer  13  can be firmly fixed between the first frame  11  and the second frame  12 . 
     Referring to  FIGS.  1 A and  3 B  in view of  FIGS.  4 ,  5  and  6 A , in the above-mentioned embodiments, the first brackets  111  and the second brackets  121  of each of the fixtures  1   a ,  1   b  and  1   c  can together define an opening O. The shape of the opening O corresponds to the working surface  21  of the hot pressing machine  2   a  or  2   b , so that the first frame  11  or the second frame  12  is directly fixed on the working surface  21  of the hot pressing machine  2   a  or  2   b  through the opening O. As shown in  FIG.  1 A , the opening O can be defined by the first distance D 1  and the second distance D 2 . As shown in  FIG.  3 B , the opening O can be defined in the first frame  11  and the second frame  12 . Particularly, the shape of the opening O in the above embodiments is a square or a rectangle. In other embodiments, the opening can be a rhombus or any of other quadrilaterals, as long as the opening can correspond to the working surface  21  of the hot pressing machine  2   a  or  2   b . This disclosure is not limited thereto. 
     Referring to  FIGS.  4 ,  5  and  6 A , the flexible heat blocking layer  13  is made of a cloth material, and the cloth material comprises Teflon and/or a glass fiber material, or any of other conventional heat blocking materials that are heat-resistant, scratch-resistant, and having low friction. In detail, the first frame  11  and/or the second frame  12  are configured to tension and fix the flexible heat blocking layer  13 . During the heat pressing process, when the hot pressing head  22  moves on the flexible heat blocking layer  13 , the flexible heat blocking layer  13  is not relatively moved with respect to the hot pressing head  22 . Therefore, the flexible heat blocking layer  13  can be prevented from being wrinkled during the heat pressing process, and the lifetime of the flexible heat blocking layer  13  can be increased. This configuration can avoid the bad shape of the manufactured airbag and the poor hot pressing effect. In addition, the configuration of the flexible heat blocking layer  13  can prevent the hot pressing head  22  from directly contacting the elastic plastic piece  3 , wherein the direct contacting between the hot pressing head  22  and the elastic plastic piece  3  may cause the overheating of the elastic plastic piece  3  so as to scratch or warp the elastic plastic piece  3 , thereby leading to the poor quality of the manufactured airbag. 
       FIG.  6 B  is a sectional view of a fixture and a hot pressing head of a hot pressing machine according to another embodiment of this disclosure. In this embodiment, any of the fixtures  1   a ,  1   b  and  1   c  further includes at least one fixing portion  15 , which is disposed on the first frame  11  and/or the second frame  12 . The fixing portion  15  is in contact with the hot pressing machine  2   a  or  2   b  for fixing the fixture  1   a ,  1   b  or  1   c  on the hot pressing machine  2   a  or  2   b . The at least one fixing portion  15  can comprise at least two protrusions  151 , which are disposed at two opposite positions on the first brackets  111  and/or the second brackets  121 . As shown in  FIG.  6 B , two protrusions  151  are disposed on, for example, two opposite sides of the second frame  12 . To be noted, the amounts and positions of the protrusions  151  can be changed based on the requirement of users as long as the fixture  1   a ,  1   b  or  1   c  can be firmly fixed on the working surface  21  of the hot pressing machine  2   a  or  2   b.    
     In summary, the fixture for heat pressing process of this disclosure can be applied to various kinds of hot pressing mechanisms for manufacturing customized airbags of various sizes and shapes, and preventing the breaking or warp of plastic pieces or the generation of toxic exhaust gas. In addition, the fixture for heat pressing process of this disclosure has a simple structure, so that it can be quickly assembled and adjusted, and is suitable for the working surfaces of various kinds of hot pressing mechanisms. 
     Although the disclosure has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternative embodiments, will be apparent to persons skilled in the art. It is, therefore, contemplated that the appended claims will cover all modifications that fall within the true scope of the disclosure.