A mold-locking device

Abstract

This application relates to a mold-locking device, belonging to the field of plastic product molding machines. It includes a guide rail support, a front mold plate slidably mounted on the guide rail support, a rear mold plate slidably mounted on the guide rail support and opposite to the front mold plate, a drive assembly for driving the front and rear mold plates to slide relative to each other, a positioning assembly connecting the front and rear mold plates to drive them to slide synchronously, and a connecting arm fixedly connecting the drive assembly and the rear mold plate. This application has the effect of reducing the pressure exerted by the drive support on the guide rail support, thereby reducing damage to the guide rail support and extending its service life.

Description

Technical Field

[0001] This application relates to the field of plastic product molding machines, and more particularly to a mold clamping device. Background Technology

[0002] In the realm of contemporary industrial production and machinery manufacturing, performance optimization and functional enhancement of various equipment and devices have always been key areas of research, especially in situations involving high precision requirements, where excellent mold clamping devices play a crucial role.

[0003] Chinese utility model patent CN217752616U discloses a mold-locking device, including a guide rail bracket, a front template slidably mounted on the guide rail bracket, a rear template slidably mounted on the guide rail bracket and opposite to the front template, a drive assembly for driving the front and rear templates to slide relative to each other, a positioning assembly connecting the front and rear templates to drive them to slide synchronously, and a connecting arm fixedly connecting the drive assembly and the rear template. The drive assembly includes a drive bracket mounted on the guide rail bracket, a rotation drive component mounted on the drive bracket, a drive crank, and a drive connecting rod. One end of the connecting arm is hinged to the back of the rear template, and the other end is hinged to the front end of the drive bracket. This causes the drive bracket to apply an additional downward pressure to the guide rail bracket during the mold-locking process to achieve torque balance, affecting the service life of the guide rail bracket. In view of the above-mentioned related technology, the inventors believe that there is a current need for a mold-locking device with a longer service life for the guide rail. Utility Model Content

[0004] To reduce damage to the guide rail bracket, this application provides a mold-locking device.

[0005] This application provides a mold-locking device, which adopts the following technical solution:

[0006] A mold-locking device includes a guide rail bracket, a front mold plate slidably disposed on the guide rail bracket, a rear mold plate slidably disposed on the guide rail bracket and opposite to the front mold plate, a drive assembly for driving the front mold plate and the rear mold plate to slide relative to each other, a positioning assembly connecting the front mold plate and the rear mold plate to drive the front mold plate and the rear mold plate to slide synchronously, and a connecting arm fixedly connecting the drive assembly and the rear mold plate; the drive assembly includes a drive bracket mounted on the guide rail bracket, a drive crank rotatably mounted on the drive bracket, a drive connecting rod with one end hinged to the drive crank and the other end hinged to the back end of the front mold plate, and a drive motor mounted on the drive bracket for driving the drive crank to rotate; the connecting arm includes a first connecting portion hinged to the back end of the rear mold plate, a second connecting portion hinged to the back end of the drive bracket, and a connecting beam connecting the first connecting portion and the second connecting portion.

[0007] By adopting the above technical solution, when the mold-locking device is used for mold locking, the drive motor is started, and both the drive crank and the drive connecting rod swing, thereby causing the front mold plate to slide closer to the rear mold plate. The force exerted by the front mold plate on the drive assembly causes the drive assembly to slide away from the front mold plate. Since the connecting arm and the drive bracket are hinged at the rear end, a certain amount of buffering is provided in the torque direction, thereby reducing the impact force of the drive bracket on the guide rail bracket and reducing damage to the guide rail.

[0008] Optionally, the guide rail bracket includes a bottom bracket and two linear guide rails mounted on the top surface of the bottom bracket. The bottom bracket has a structural through slot with an upper opening, and the two linear guide rails are symmetrically arranged on both sides of the upper opening of the structural through slot. The front template is provided with a front slider that cooperates with the linear guide rails. The rear template is provided with a rear slider that cooperates with the linear guide rails. The drive bracket is provided with a drive slider that cooperates with the linear guide rails.

[0009] By adopting the above technical solution, the bottom bracket can be supported on the bottom surface of the linear guide rail, thereby achieving an ideal support effect for the linear guide rail. The front slider on the linear guide rail makes the front template slide more smoothly. The rear slider on the linear guide rail ensures smooth sliding of the rear template. The drive slider on the linear guide rail further enhances the smoothness of the drive bracket's sliding motion.

[0010] Optionally, the number of connecting arms is one, and the connecting arm is arranged in the structural through groove; the back end of the rear template is provided with a first mounting base structure for hinged arrangement of the first connecting part, and the back end of the drive bracket is provided with a second mounting base structure for hinged arrangement of the second connecting part.

[0011] By adopting the above technical solution, a specific installation method for a single connecting arm is disclosed, in which the connecting arm is arranged in the structural through groove, thereby making the overall structure compact.

[0012] Optionally, the positioning assembly includes a synchronization box fixedly installed on the side of the bottom support, a first positioning frame fixedly installed on the front template, a first columnar rack installed on the first positioning frame and arranged horizontally, a second positioning frame fixedly installed on the rear template, and a second columnar rack installed on the second positioning frame and arranged horizontally; a synchronization gear that simultaneously engages with the first columnar rack and the second columnar rack is rotatably installed inside the synchronization box.

[0013] By adopting the above technical solution and setting a positioning component, when the current template slides, the first columnar rack slides relative to the bottom support, which drives the second columnar rack to slide through the synchronous gear, thereby causing the rear template to slide, thus achieving the function of synchronous sliding.

[0014] Optionally, the number of connecting arms is two, and the two connecting arms are symmetrically arranged on both sides of the guide rail bracket; the back end of the rear template is provided with a first mounting base structure for hinged arrangement of the first connecting part, and the back end of the drive bracket is provided with a second mounting base structure for hinged arrangement of the second connecting part.

[0015] By adopting the above technical solution, two connecting arms are set and symmetrically arranged on both sides of the guide rail bracket, making the structural strength more stable and enabling it to be applied to clamping structures with greater clamping force.

[0016] Optionally, both ends of the two connecting arms are fixedly connected to reinforcing members, the reinforcing members including a first vertical plate arranged vertically and a first horizontal plate connected to the bottom surface of the first vertical plate and arranged horizontally.

[0017] By adopting the above technical solution and setting up reinforcing components, the structural strength of the molding device can be improved, and the stability of the molding device during the molding process can be enhanced.

[0018] Optionally, a first slider that mates with a linear guide rail is mounted on the bottom surface of the first horizontal plate.

[0019] By adopting the above technical solution, the first slider is set at the bottom of the first horizontal plate, which can support and guide the drive bracket, and help make the sliding of the entire mechanism on the linear guide rail more stable.

[0020] Optionally, the positioning assembly includes a synchronization box fixedly installed in the structural through groove, a first positioning frame fixedly installed at the bottom of the front template, a first columnar rack installed on the first positioning frame and arranged horizontally, a second positioning frame fixedly installed at the bottom of the rear template, and a second columnar rack installed on the second positioning frame and arranged horizontally; a synchronization gear that simultaneously engages with the first columnar rack and the second columnar rack is rotatably installed in the synchronization box.

[0021] By adopting the above technical solution, the specific structure of the positioning component is disclosed. When the current template slides, the first columnar rack slides relative to the bottom support, and the second columnar rack slides through the synchronous gear, thereby causing the rear template to slide, thus achieving the effect of synchronous sliding. Moreover, the positioning component is set in the structural through groove, making the structure more compact.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. A mold-locking device, comprising a guide rail bracket, a front template, a rear template, a drive assembly, a positioning assembly, and a connecting arm, wherein by hinged one end of the connecting arm to the back end of the rear template and the other end to the back end of the drive bracket, a certain buffer can be provided in the torque direction, thereby reducing the impact force of the drive bracket on the guide rail bracket and reducing damage to the guide rail.

[0024] 2. The positioning assembly includes a synchronization box, a first positioning frame, a first cylindrical rack, a second positioning frame, and a second cylindrical rack, and a synchronization gear is provided inside the synchronization box, thereby realizing the synchronous sliding of the front template and the rear template;

[0025] 3. By setting two connecting arms and providing reinforcing members at both ends of the two connecting arms, the clamping stability of the clamping device can be improved. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the mold-locking device in Embodiment 1 of this application.

[0027] Figure 2 This is a schematic diagram of the guide rail bracket in Embodiment 1 of this application.

[0028] Figure 3 This is a schematic diagram of the structure of the locking device in Embodiment 1 of this application, showing the connection part between the connecting arm and the rear template.

[0029] Figure 4 This is a cross-sectional schematic diagram of the positioning component in Embodiment 1 of this application.

[0030] Figure 5 This is a schematic diagram of the mold-locking device in Embodiment 1 of this application without showing the guide rail bracket.

[0031] Figure 6 This is a schematic diagram of the mold-locking device in Embodiment 2 of this application.

[0032] Figure 7 This is a schematic diagram of the structure of the locking device in Embodiment 2 of this application, showing the connection part of the drive bracket and the connecting arm.

[0033] Figure 8 This is a schematic cross-sectional view of the front template, rear template, and positioning component in Embodiment 2 of this application.

[0034] Explanation of reference numerals in the attached drawings: 1. Guide rail bracket; 11. Bottom bracket; 111. Structural through slot; 112. Strip through hole; 12. Linear guide rail; 2. Front template; 21. Front slider; 22. Front mold clamping plate; 221. Front clamping surface; 3. Rear template; 31. Rear slider; 32. Rear mold clamping plate; 321. Rear clamping surface; 33. First mounting slot; 34. First connecting plate; 35. First connecting shaft; 4. Positioning assembly; 41. Synchronizing box; 411. Synchronizing gear; 42. First positioning frame; 43. First column. 44. Second positioning frame; 45. Second cylindrical rack; 5. Drive assembly; 51. Drive bracket; 52. Drive crank; 53. Drive connecting rod; 54. Drive motor; 541. Reducer; 55. Drive slider; 56. Second mounting slot; 57. Second connecting plate; 58. Second connecting shaft; 6. Connecting arm; 61. First connecting part; 62. Second connecting part; 63. Connecting crossbeam; 7. Reinforcing member; 71. First vertical plate; 72. First horizontal plate; 73. First slider; 8. Positioning plate. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0036] Example 1

[0037] This application discloses a mold-locking device. (Refer to...) Figure 1 The mold-locking device includes a guide rail bracket 1, a front template 2 slidably mounted on the guide rail bracket 1, a rear template 3 slidably mounted on the guide rail bracket 1 and opposite to the front template 2, a positioning component 4 connecting the front template 2 and the rear template 3 to drive the front template 2 and the rear template 3 to slide synchronously, a driving component 5 for driving the front template 2 and the rear template 3 to slide relative to each other, and a connecting arm 6 that fixes the driving component 5 and the rear template 3 together.

[0038] Reference Figure 2The guide rail bracket 1 includes a bottom bracket 11 and linear guide rails 12. The bottom bracket 11 is generally elongated. The upper end of the bottom bracket 11 has a structural through groove 111 that runs through both the upper and lower surfaces. The bottom bracket 11 has multiple strip-shaped through holes 112 on both sides of the structural through groove 111 to reduce weight. The linear guide rails 12 are mounted on the top surface of the bottom bracket 11, and there are two linear guide rails 12. The two linear guide rails 12 are parallel to each other and symmetrically arranged about the upper opening of the structural through groove 111.

[0039] Reference Figure 3 The front template 2 includes a front slider 21 for engaging with the linear guide rail 12 and a front mold clamping plate 22 fixedly disposed above the front slider 21. One or more front sliders 21 can be disposed on each of the two linear guide rails 12; in this embodiment, two front sliders 21 are disposed on each of the two linear guide rails 12. The front sliders 21 engage with the linear guide rails 12 and can slide relative to the linear guide rails 12, thereby allowing the front template 2 to slide and be disposed on the guide rail support 1. The front template 2 has a front clamping surface 221, which is located on the side of the front template 2 closest to the rear template 3. The front clamping surface 221 is a rectangular surface to facilitate the front template 2 to conform to and clamp the mold.

[0040] Reference Figure 1 and Figure 3 The rear template 3 includes a rear slider 31 for cooperating with the linear guide rail 12 and a rear mold clamping plate 32 fixedly disposed above the rear slider 31. One or more rear sliders 31 can be disposed on each of the two linear guide rails 12. In this embodiment, two rear sliders 31 are disposed on each of the two linear guide rails 12. The rear sliders 31 cooperate with the linear guide rails 12 and can slide relative to the linear guide rails 12, thereby allowing the rear template 3 to slide and be disposed on the guide rail support 1. The rear mold clamping plate 32 has a rear clamping surface 321, which is located on the side of the rear template 3 closest to the front template 2. The rear clamping surface 321 is a rectangular surface to facilitate the rear template 3 to conform to and clamp the mold.

[0041] Reference Figure 1 and Figure 4 The positioning assembly 4 includes a synchronization box 41 fixedly installed on the side wall of the bottom support 11, a first positioning frame 42 fixedly installed on the bottom of the front template 2, a first cylindrical rack 43 installed on the first positioning frame 42 and arranged horizontally, a second positioning frame 44 fixedly installed on the bottom of the rear template 3, and a second cylindrical rack 45 installed on the second positioning frame 44 and arranged horizontally. A synchronization gear 411 is rotatably installed inside the synchronization box 41. The synchronization box 41 has two oppositely arranged through holes for the first cylindrical rack 43 to pass through and two oppositely arranged through holes for the second cylindrical rack 45 to pass through. The first cylindrical rack 43 and the second cylindrical rack 45 are arranged in parallel, and both the first cylindrical rack 43 and the second cylindrical rack 45 mesh with the synchronization gear 411.

[0042] Reference Figure 1 and Figure 4 In this embodiment, the first positioning frame 42 is a T-shaped component, one end of which is fixed to the front mold clamping plate 22, and the other end extends below the front mold clamping plate 22 and is located on the outer side wall of the bottom support 11. The first positioning frame 42 has a first connecting hole for fixing the first cylindrical rack 43 and a second connecting hole for the second cylindrical rack 45 to pass through. The second positioning frame 44 is a T-shaped component, one end of which is fixed to the rear mold clamping plate 32, and the other end extends below the rear mold clamping plate 32 and is located on the outer side wall of the bottom support 11. The second positioning frame 44 has a third connecting hole for fixing the second cylindrical rack 45 and a fourth connecting hole for the first cylindrical rack 43 to pass through.

[0043] Reference Figure 3 The drive assembly 5 includes a drive bracket 51 mounted on the guide rail bracket 1, a drive crank 52 rotatably mounted on the drive bracket 51, a drive connecting rod 53 with one end hinged to the drive crank 52 and the other end hinged to the back end of the front template 2, a drive motor 54 for driving the crank 52 to rotate, and a drive slider 55 mounted on the drive bracket 51 and cooperating with the linear guide rail 12. The front end of the drive motor 54 is provided with a reducer 541 and is connected to the drive crank 52 for transmission, so that the drive crank 52 can be driven to rotate by the drive motor 54. In this embodiment, the axis of the drive crank 52 is horizontally arranged. One or more drive sliders 55 can be provided on each of the two linear guide rails 12. In this embodiment, two drive sliders 55 are provided on each of the two linear guide rails 12, cooperating with the linear guide rails 12 and capable of sliding relative to the linear guide rails 12, thereby allowing the drive bracket 51 to be slidably mounted on the guide rail bracket 1.

[0044] Reference Figure 2 and Figure 5 A connecting arm 6 connects the drive bracket 51 and the rear template 3. The connecting arm 6 is arranged in the structural through groove 111. The connecting arm 6 includes a first connecting part 61 hinged to the back end of the rear template 3, a second connecting part 62 hinged to the back end of the drive bracket 51, and a connecting beam 63 connecting the first connecting part 61 and the second connecting part 62.

[0045] Reference Figure 3 The rear template 3 has a first mounting base structure on its side opposite to the front template 2 for hinged engagement with the first connecting part 61. The first mounting base structure includes a first mounting groove 33 at the back end of the rear template 3, two first connecting plates 34 at both ends of the first mounting groove 33, and a first connecting shaft 35 rotatably mounted between the two first connecting plates 34. The first connecting part 61 has a first hinge hole for engaging with the first connecting shaft 35. Both first connecting plates 34 have first fixing holes for the ends of the first connecting shaft 35.

[0046] Reference Figure 5 The drive bracket 51 has a second mounting base structure on its rear end for hinged engagement with the second connecting part 62. The second mounting base structure includes a second mounting groove 56 located at the rear end of the drive bracket 51, two second connecting plates 57 located at both ends of the second mounting groove 56, and a second connecting shaft 58 rotatably mounted between the two second connecting plates 57. The second connecting part 62 has a second hinge hole for engaging with the second connecting shaft 58. Both second connecting plates 57 have second fixing holes for the ends of the second connecting shaft 58. In this embodiment, the horizontal height of the axis of the hinge shaft between the drive link 53 and the front template 2 is higher than the horizontal height of the axis of the second connecting shaft 58, and the height difference between the two is less than 15 cm.

[0047] The implementation principle of Example 1: When using the mold-locking device, the mold is placed between the front template 2 and the rear template 3. The drive motor 54 is started, and the drive crank 52 and drive connecting rod 53 swing, thereby pushing the front template 2 to slide closer to the rear template 3. At this time, under the drive of the positioning component 4 located on the side wall of the base plate, the front template 2 and the rear template 3 slide relative to or towards each other. The force of the front template 2 acting on the drive bracket 51 causes the drive component 5 to slide away from the front template 2. Thus, the drive bracket 51 pulls the rear template 3 through the connecting arm 6, causing the rear template 3 to slide closer to the front template 2. The front template 2 and the rear template 3 slide towards each other and clamp the mold. At this time, since the horizontal height of the axis of the hinge shaft of the drive connecting rod 53 and the front template 2 is higher than the horizontal height of the axis of the second connecting shaft 58, and the height difference between the two is less than 15cm, the impact force of the drive bracket 51 on the guide rail bracket 1 is reduced, and damage to the guide rail is reduced.

[0048] Example 2

[0049] Reference Figure 6 Except for the structure and quantity of the connecting arm 6, the installation position of the connecting arm 6 relative to the guide rail bracket 1, and the installation structure of the positioning component 4, the rest of the structure is the same as the locking device in Embodiment 1.

[0050] Reference Figure 6 In this embodiment, there are two connecting arms 6. The two connecting arms 6 are symmetrically arranged on both sides of the guide rail bracket 1. The connecting arm 6 includes a first connecting part 61 hinged to the back end of the rear template 3, a second connecting part 62 hinged to the back end of the drive bracket 51, and a connecting beam 63 connecting the first connecting part 61 and the second connecting part 62.

[0051] Reference Figure 6 and Figure 7The rear template 3 is provided with a first mounting base structure corresponding to each of the two first connecting parts 61. The first mounting base structure includes a first mounting groove 33 located at the back end of the rear template 3, four first connecting plates 34 located at both ends of the first mounting groove 33, and a first connecting shaft 35 rotatably mounted between the four first connecting plates 34. The first connecting part 61 has a first hinge hole for engaging with the first connecting shaft 35. Each of the four first connecting plates 34 has a first fixing hole for the end of the first connecting shaft 35.

[0052] Reference Figure 7 The drive bracket 51 is provided with second mounting base structures that correspond one-to-one with the two second connecting portions 62. The second mounting base structure includes a second mounting groove 56 located at the rear end of the drive bracket 51, three second connecting plates 57 located at both ends of the second mounting groove 56, and a second connecting shaft 58 rotatably mounted between the three second connecting plates 57. The second connecting portion 62 has a second hinge hole for engaging with the second connecting shaft 58. Each of the three second connecting plates 57 has a second fixing hole for the end of the second connecting shaft 58.

[0053] Reference Figure 6 and Figure 7 To improve mold-locking stability, reinforcing members 7 are fixedly connected to both ends of the two connecting arms 6. The reinforcing members 7 include a vertically arranged first vertical plate 71 and a horizontally arranged first horizontal plate 72 connected to the bottom surface of the first vertical plate 71. The first vertical plate 71 and the first horizontal plate 72 are generally L-shaped, allowing the two connecting arms 6 to be fixedly connected, thus making the connection between the rear template 3 and the drive bracket 51 more stable. A first slider 73 that mates with the linear guide rail 12 is installed on the bottom surface of the first horizontal plate 72, thereby improving the stability of the entire mechanism's sliding on the linear guide rail 12.

[0054] Reference Figure 8The positioning assembly 4 is fixedly installed in the structural through groove 111, including a square positioning plate 8 fixedly connected to the side wall of the bottom bracket 11 within the structural through groove 111, a synchronization box 41 fixedly installed on the square positioning plate 8, a first positioning frame 42 fixedly installed at the bottom of the front template 2, a first cylindrical rack 43 installed on the first positioning frame 42 and arranged horizontally, a second positioning frame 44 fixedly installed at the bottom of the rear template 3, and a second cylindrical rack 45 installed on the second positioning frame 44 and arranged horizontally. A synchronization gear 411 is rotatably installed inside the synchronization box 41. The synchronization box 41 has two oppositely arranged through holes for the first cylindrical rack 43 to pass through and two oppositely arranged through holes for the second cylindrical rack 45 to pass through. The first cylindrical rack 43 and the second cylindrical rack 45 are arranged in parallel, and both the first cylindrical rack 43 and the second cylindrical rack 45 mesh with the synchronization gear 411. The first positioning frame 42 is a T-shaped component, with a first connecting hole for fixing the first cylindrical rack 43 and a second connecting hole for the second cylindrical rack 45 to pass through. The second positioning frame 44 is a T-shaped component, with a third connecting hole for fixing the second cylindrical rack 45.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A mold-locking device, characterized in that, The system includes a guide rail bracket (1), a front template (2) slidably mounted on the guide rail bracket (1), a rear template (3) slidably mounted on the guide rail bracket (1) and opposite to the front template (2), a drive assembly (5) for driving the front template (2) and the rear template (3) to slide relative to each other, a positioning assembly (4) connecting the front template (2) and the rear template (3) to drive the front template (2) and the rear template (3) to slide synchronously, and a connecting arm (6) fixedly connecting the drive assembly (5) and the rear template (3); the drive assembly (5) includes a drive support mounted on the guide rail bracket (1). The drive arm (6) comprises a frame (51), a drive crank (52) rotatably mounted on the drive bracket (51), a drive connecting rod (53) with one end hinged to the drive crank (52) and the other end hinged to the back end of the front template (2), and a drive motor (54) mounted on the drive bracket (51) for driving the drive crank (52) to rotate; the connecting arm (6) includes a first connecting part (61) hinged to the back end of the rear template (3), a second connecting part (62) hinged to the back end of the drive bracket (51), and a connecting beam (63) connecting the first connecting part (61) and the second connecting part (62).

2. A device according to claim 1, wherein The guide rail bracket (1) includes a bottom bracket (11) and two linear guide rails (12) mounted on the top surface of the bottom bracket (11). The bottom bracket (11) has a structural through groove (111) with an upper opening. The two linear guide rails (12) are symmetrically arranged on both sides of the upper opening of the structural through groove (111). The front template (2) is provided with a front slider (21) that cooperates with the linear guide rail (12). The rear template (3) is provided with a rear slider (31) that cooperates with the linear guide rail (12). The drive bracket (51) is provided with a drive slider (55) that cooperates with the linear guide rail (12).

3. A device as claimed in claim 2, wherein the locking means comprises a locking pin which is arranged to be received in a locking hole in the piston. The number of connecting arms (6) is one, and the connecting arm (6) is arranged in the structural through groove (111); the back end of the rear template (3) is provided with a first mounting base structure for the first connecting part (61) to be hinged, and the back end of the drive bracket (51) is provided with a second mounting base structure for the second connecting part (62) to be hinged.

4. A device as claimed in claim 3, wherein the locking means comprises a locking pin. The positioning assembly (4) includes a synchronization box (41) fixedly installed on the side of the bottom support (11), a first positioning frame (42) fixedly installed on the front template (2), a first column rack (43) installed on the first positioning frame (42) and arranged horizontally, a second positioning frame (44) fixedly installed on the rear template (3), and a second column rack (45) installed on the second positioning frame (44) and arranged horizontally; a synchronization gear (411) is rotatably installed in the synchronization box (41) and simultaneously engages with the first column rack (43) and the second column rack (45).

5. A device as claimed in claim 2, wherein the locking means comprises a locking pin. The number of connecting arms (6) is two, and the two connecting arms (6) are symmetrically arranged on both sides of the guide rail bracket (1); the back end of the rear template (3) is provided with a first mounting base structure for the first connecting part (61) to be hinged, and the back end of the drive bracket (51) is provided with a second mounting base structure for the second connecting part (62) to be hinged.

6. A device as claimed in claim 5, wherein the locking means comprises a locking pin. Both ends of the two connecting arms (6) are fixedly connected to reinforcing members (7), which include a first vertical plate (71) arranged vertically and a first horizontal plate (72) connected to the bottom surface of the first vertical plate (71) and arranged horizontally.

7. A device as claimed in claim 6, wherein the locking means comprises a locking pin. The bottom surface of the first horizontal plate (72) is equipped with a first slider (73) that cooperates with the linear guide rail (12).

8. A device according to claim 5, wherein The positioning assembly (4) includes a synchronization box (41) fixedly installed in the structural through groove (111), a first positioning frame (42) fixedly installed at the bottom of the front template (2), a first columnar rack (43) installed on the first positioning frame (42) and arranged horizontally, a second positioning frame (44) fixedly installed at the bottom of the rear template (3), and a second columnar rack (45) installed on the second positioning frame (44) and arranged horizontally; a synchronization gear (411) that simultaneously cooperates with the first columnar rack (43) and the second columnar rack (45) is rotatably installed in the synchronization box (41).

Images