Positioning pin mounting mechanism for thermal forming machining

Abstract

The utility model is applicable to the technical field of positioning pin mounting mechanisms, and provides a positioning pin mounting mechanism for thermal forming processing, which comprises a die body and a placing plate, a bottom plate is slidably connected onto the placing plate, two support plates are symmetrically, vertically and fixedly connected onto the bottom plate, and a top plate is fixedly mounted at the top ends of the two support plates. A sliding rod is vertically and fixedly connected between the bottom plate and the top plate, a sliding sleeve is slidably connected to the outer side of the sliding rod, an extending block is fixedly installed on the side wall of the sliding sleeve, and a smashing block is fixedly connected to the bottom wall of the extending block. Afterwards, the abutting plates on the two sides are far away from the two ends of the winding roller, under the driving of resilience of the reset springs and the gravity of the sliding sleeves, the sliding sleeves fall, the smashing blocks are controlled to fall into the guide sleeves, the positioning pins in the guide sleeves are smashed, manual operation is not needed in the mode, and the manual workload can be greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of positioning pin installation mechanisms, in particular to a positioning pin installation mechanism for thermoforming processing. Background Art

[0002] When thermoforming molds are used to manufacture products, some products have positioning structure designs. Positioning structures that are closer to the products need to be completed with positioning pins installed on the thermoforming molds to meet the design requirements of the products.

[0003] The Chinese utility model patent, with announcement number 202321892529.X, discloses a mold locating pin fixing structure and a thermoforming mold, comprising a fourth lower mold insert, a third locating pin, and a locating pin fixing member. The fourth lower mold insert is provided with a locating pin mounting groove corresponding to the locating structure of the product to be produced. The plug-in portion of the third locating pin engages with the locating pin mounting groove to provide a limit position. The portion of the third locating pin protruding from the fourth lower mold insert corresponds to the locating structure of the product to be produced. The outer side surface of the plug-in portion of the third locating pin is provided with a slot. The locating pin fixing member engages with the slot to provide a limit position, and the locating pin fixing member engages with the fourth lower mold insert to provide a locking arrangement. This utility model facilitates the removal of broken locating pins, making replacement relatively simple, reducing workload, minimizing the impact on the use of the thermoforming mold, and minimizing the impact on the supply of parts and products.

[0004] However, the above device has the following technical problems when actually used:

[0005] 1. The above-mentioned device inserts the positioning pin into the designated assembly hole on the mold, and then manually hammers the positioning pin into the designated assembly hole. However, this method requires manual hammering using external tools. On the one hand, the manual hammering will require more physical strength, and on the other hand, the recoil force transmitted to the hammering tool during manual hammering will be transmitted to the worker's hands, causing strain on the worker's hands.

[0006] Second, in addition, the above device lacks a vertical guide mechanism for the positioning pin, and the positioning pin is generally manually held by hand. This method may cause the positioning pin to deviate when moving downward, and its vertical downward movement cannot be guaranteed, thereby causing deformation or damage to the positioning pin, and may even cause damage to the mold. Utility Model Content

[0007] The present invention provides a positioning pin installation mechanism for thermoforming processing, which aims to solve the problem mentioned in the above-mentioned background technology that the above-mentioned device requires manual labor to hammer the positioning pin into the assembly hole. On the one hand, this method consumes too much physical strength of the human body. On the other hand, long-term manual work will cause soreness and swelling of the hands due to the influence of the recoil force. At the same time, the above-mentioned device cannot ensure that the positioning pin enters the assembly hole vertically.

[0008] The utility model is implemented as follows: a positioning pin installation mechanism for hot forming processing comprises: a mold body, an assembly hole is opened on it, a positioning pin body is arranged in the assembly hole, a placement plate, which is detachably fixedly installed on the top of the mold body, and the placement plate is slidably connected to the bottom plate, one end of the bottom plate extends to one side of the placement plate, two support plates are symmetrically erected and fixed on the bottom plate, and the top ends of the two support plates are fixedly installed with a top plate, wherein a sliding rod is erected and fixed between the bottom plate and the top plate, a sliding sleeve is slidably connected to the outer side of the sliding rod, an extension block is fixedly installed on the side wall of the sliding sleeve, a striking block is fixedly connected to the bottom wall of the extension block, and the bottom wall of the bottom plate corresponding to the striking block The top of the device is provided with a directional assembly, which is used to vertically guide the locating pin body that is hammered into the assembly hole. A lifting mechanism is also fixedly installed on the top plate, which is movably connected to the sliding sleeve and is used to lift the sliding sleeve to a higher position along the sliding rod. In this scheme, when the winding roller of this device rotates, the sliding sleeve can be lifted up by using a sling, so that the sliding sleeve moves to a high position along the sliding rod, and then the two side clamping plates move away from the two ends of the winding roller. Driven by the rebound of the return spring and the gravity of the sliding sleeve itself, the sliding sleeve falls and controls the striking block to fall into the guide sleeve, and strikes the locating pin in the guide sleeve, so that the locating pin moves into the assembly hole. This method does not require manual operation and can greatly reduce manual workload.

[0009] In addition, a set of guide components is provided on the inner wall of each side of the guide sleeve. When the locating pin is inside the guide sleeve, its outer wall fits into the multiple sets of guide components. The guide components are used to guide and limit the downward movement of the locating pin to prevent the locating pin from being deflected or misplaced during the downward movement.

[0010] Preferably, the orientation assembly includes: a guide sleeve fixedly mounted on the bottom wall of the base plate and located on one side of the placement plate, a positioning pin body can be accommodated in the guide sleeve, and the striking block can penetrate into the guide sleeve, a guide assembly is provided on each side wall of the guide sleeve, and each group of the guide assemblies has: a plurality of rotating grooves opened on the side wall along the height longitudinal direction of the guide sleeve, a plurality of the rotating grooves are arranged at intervals, and a rotating roller is rotatably connected to each rotating groove through a rotating shaft, and a portion of the rotating roller extends to the outside of the rotating groove and fits on the outer wall of the positioning pin body in the guide sleeve; in this scheme, during actual assembly, the base plate is manually slid horizontally on the placement plate so that the guide sleeve at the bottom of the base plate moves to above the assembly hole on the mold body, and then the positioning pin is sent into the guide sleeve, and one end of the positioning pin is inserted into the assembly hole. At this time, the outer wall of the positioning pin and the outer wall of the rotating roller on the inner wall around the guide sleeve fit together, and a plurality of rotating rollers are used to limit the vertical angle of the positioning pin to prevent it from tilting.

[0011] It should be explained that when the positioning pin is in the guide sleeve, its outer wall and the rotating rollers around it abut against each other, which can effectively prevent the positioning pin from shaking.

[0012] Preferably, the lifting mechanism includes: the sliding rod is a hollow structure with a cavity formed inside, a strip groove connected to the cavity is formed upright on the side wall of the sliding rod, a lifting seat is provided in the cavity, a connecting block that slides with the strip groove is fixed on the side wall of the lifting seat, the connecting block is fixed on the inner side wall of the sliding sleeve, the top end of the sliding rod passes through the top plate, and two rotating seats are symmetrically fixedly installed on the top plate, a winding roller is rotatably connected between the two rotating seats, and the winding roller is wound on A sling is fixed around it, and the other end of the sling is fixedly connected to the top of the lifting seat; in this scheme, one end of the sling is fixedly mounted on the outer wall of the winding roller, and the other end is inserted into the cavity and fixedly mounted on the top wall of the lifting seat. When the winding roller rotates to one side, the sling will be wound and rolled up, thereby using the sling to pull the lifting seat in the cavity, and because a connecting block sliding in the strip groove is fixedly mounted on the side wall of the lifting seat, when the lifting seat moves up, the sliding sleeve will be driven to move up synchronously through the connecting block, and the sliding sleeve will squeeze the reset spring when it moves up along the outer wall of the sliding rod.

[0013] Preferably, a driving assembly for controlling the rotation of the winding roller is further provided, comprising: a connecting plate arranged above the top plate, a bidirectional electric push rod being fixedly connected to the connecting plate, and sliding grooves are provided on the connecting plates on both sides of the bidirectional electric push rod, a sliding bracket being slidably connected in the sliding groove, the sliding bracket on each side being fixedly connected to the output end on the corresponding side of the bidirectional electric push rod, the bottom ends of the two sliding brackets extending toward the top plate, and being located on both sides of the winding roller, the two sliding brackets facing the sides of the winding roller A clamping plate is rotatably connected to the wall, and a driving motor is fixedly installed on one side of the sliding bracket, and its output end is fixedly connected to the clamping plate on this side; in this scheme, when the output ends on both sides of the bidirectional electric push rod shrink, the sliding brackets on both sides will be pulled towards each other in the sliding groove, and at the same time, the sliding brackets on both sides drive the clamping plates to press tightly against the two sides of the winding roller, thereby increasing the friction between the clamping plate and the end of the winding roller, and then when the output end of the driving motor controls the rotation of the clamping plate on one side, the rotational kinetic energy will be transmitted to the winding roller, thereby completing the winding operation of the sling.

[0014] It needs to be explained that when the output end of the bidirectional electric push rod pushes the two side clamping plates away from the winding roller, the winding roller loses external restrictions. At this time, the rebound kinetic energy of the reset spring is released instantly, and combined with the weight of the lifting seat (sliding sleeve) itself, it can drive the sliding sleeve to move quickly toward the bottom plate, thereby increasing the potential energy of the falling striking block.

[0015] Preferably, the two abutting plates are fixedly installed with guiding inserts on the side walls of the winding roller, and the side walls of the winding roller are provided with guiding slots for accommodating the guiding inserts; in this scheme, the guiding inserts and the guiding slots can guide and limit the transverse movement of the abutting plates, preventing the abutting plates from deviating (it can be understood that when the abutting plates move away from the winding roller, the guiding inserts gradually extend out of the guiding slots, but the guiding inserts can be completely or incompletely moved out of the guiding slots).

[0016] Preferably, the outer side of the sliding rod is further sleeved with a reset spring, one end of the reset spring abutting against the bottom wall of the top plate, and the other end abutting against the top wall of the sliding sleeve; in this scheme, the purpose of the reset spring is to increase the potential energy of the falling beating block when the reset spring rebounds, and the kinetic energy generated instantaneously cooperates with the gravity of the lifting seat (sliding sleeve).

[0017] Compared with the prior art, the positioning pin mounting mechanism for thermoforming processing has the following beneficial effects:

[0018] 1. When the winding roller rotates, the sliding sleeve can be lifted by the sling, so that the sliding sleeve moves to a high position along the sliding rod, and then the two abutting plates move away from the two ends of the winding roller, and under the driving of the rebound of the reset spring and the gravity of the sliding sleeve, the sliding sleeve falls and controls the beating block to fall into the guide sleeve, and the beating block beats the positioning pin in the guide sleeve, so that the positioning pin moves into the assembly hole. This way does not need manual operation, which can greatly reduce the labor workload.

[0019] 2. A group of guide assemblies are arranged on each inner wall of the guide sleeve, and when the positioning pin is in the guide sleeve, the outer wall of the positioning pin abuts against the guide assemblies, and the guide assemblies guide and limit the downward movement of the positioning pin to prevent the positioning pin from deviating or misplacing during the downward movement. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a front view of the utility model;

[0021] Figure 2 is a side view of a partial structure in the utility model;

[0022] Figure 3 is an enlarged view of a partial structure in the utility model;

[0023] Figure 4 is an enlarged view of structure A in the utility model; Figure 1

[0024] Figure 5 is an expanded schematic view of the winding roller and the driving assembly in the utility model; ​

[0025] Figure 6 is a sectional view of the sliding rod in the utility model;

[0026] in the drawing:

[0027] 1, mold body; 11, assembly hole;

[0028] 2, placing plate; 21, bottom plate; 22, support plate; 23, top plate; 24, sliding rod; 25, sliding sleeve; 251, extension block; 26, hammering block;

[0029] 3, directional assembly; 31, guide sleeve; 32, guide assembly; 321, rotating groove; 322, rotating roller;

[0030] 4, pull-up mechanism; 41, cavity; 42, lifting seat; 421, connecting block; 43, rotating seat; 44, winding roller; 441, sling; 45, drive assembly; 451, connecting plate; 452, two-way electric push rod; 453, sliding groove; 454, sliding bracket; 455, abutting plate; 456, drive motor; 457, guide insert block; 458, guide slot;

[0031] 5, reset spring. DETAILED DESCRIPTION

[0032] The technical solutions of the utility model will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments.

[0033] The components of the embodiments of the utility model generally described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model.

[0034] Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0035] In the description of the utility model, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] See also Figure 1-6 The utility model provides a technical solution: a positioning pin installation mechanism for thermoforming processing, comprising: a mold body 1, which is provided with an assembly hole 11, a positioning pin body is provided in the assembly hole 11, a placement plate 2, which is detachably fixedly installed on the top of the mold body 1, and a bottom plate 21 is slidably connected to the placement plate 2, one end of the bottom plate 21 extends to one side of the placement plate 2, two support plates 22 are symmetrically erected and fixed on the bottom plate 21, and a top plate 23 is fixedly installed on the top of the two support plates 22, wherein the bottom plate 21 and the top plate 23 are fixedly connected. A sliding rod 24 is fixedly connected upright in the middle, and a sliding sleeve 25 is slidably connected to the outer side of the sliding rod 24. An extension block 251 is fixedly installed on the side wall of the sliding sleeve 25, and a striking block 26 is fixedly connected to the bottom wall of the extension block 251. A directional component 3 is provided on the bottom wall of the bottom plate 21 corresponding to the striking block 26. The directional component 3 is used to vertically guide the positioning pin body that is hammered into the assembly hole 11. A lifting mechanism 4 is also fixedly installed on the top plate 23. The lifting mechanism 4 is movably connected to the sliding sleeve 25 and is used to lift the sliding sleeve 25 to a higher place along the sliding rod 24.

[0038] Specifically, in this device, a groove is opened on the top wall of the placement plate 2 along its length, a moving block is slidably arranged in the groove, and the bottom plate 21 is fixedly installed on the moving block. The sliding of the moving block can drive the striking block 26 to move horizontally, thereby accurately controlling the striking block 26 to move to the corresponding position above the assembly hole 11.

[0039] It needs to be explained that when the sliding sleeve 25 is at the bottom position of the sliding rod 24, the striking block 26 is in the guide sleeve 31, and the bottom end of the striking block 26 is flush with the bottom position of the guide sleeve 31. The purpose is to ensure that the positioning pin is stably struck into the assembly hole 11.

[0040] In addition, in this device, two clamping plates are symmetrically installed for sliding at the bottom of the placing plate 2, wherein two movable grooves are symmetrically opened on the bottom wall of the placing plate 2, and the internal rotation of the placing plate 2 is connected with a bidirectional screw, and the opposite thread segments on both sides of the bidirectional screw are located in the two movable grooves, and each movable groove is slidably connected to the movable groove on the corresponding side, and is screwed to the corresponding thread segment of the bidirectional screw.

[0041] When the placement plate 2 is on the mold body 1, the clamping plates on both sides are attached to the side walls of the mold body 1 to achieve stable assembly of the placement plate 2 and fix the position of the device to avoid shaking or offset when the device hits the positioning pin later.

[0042] It should be noted that the device can be provided with a through hole connected to the assembly hole 11 on the side wall of the mold body 1, and a locking bolt is provided in the through hole. When the locating pin body is knocked into the assembly hole 11, the outer wall of the fixing hole faces the through hole, and the locking bolt can be locked and fixed in the fixing hole to complete the fixation of the locating pin body.

[0043] Furthermore, the orienting component 3 includes: a guide sleeve 31 fixedly mounted on the bottom wall of the base plate 21 and located on one side of the placement plate 2, the guide sleeve 31 can accommodate a positioning pin body, and the striking block 26 can penetrate into the guide sleeve 31, and a guide component 32 is provided on each side wall of the guide sleeve 31, and each group of guide components 32 has: a plurality of rotating grooves 321 opened on the side wall of the guide sleeve 31 along the height longitudinal direction, the plurality of rotating grooves 321 are arranged at intervals, and each rotating groove 321 is rotatably connected to a rotating roller 322 through a rotating shaft, and a portion of the rotating roller 322 extends to the outside of the rotating groove 321 and fits on the outer wall of the positioning pin body in the guide sleeve 31.

[0044] Furthermore, the lifting mechanism 4 includes: the sliding rod 24 is a hollow structure, with a cavity 41 opened inside it, a strip groove connecting the cavity 41 is opened upright on the side wall of the sliding rod 24, a lifting seat 42 is provided in the cavity 41, and a connecting block 421 that slides with the strip groove is fixedly connected to the side wall of the lifting seat 42, and the connecting block 421 is fixed to the inner side wall of the sliding sleeve 25, the top end of the sliding rod 24 passes through the top plate 23, and two rotating seats 43 are symmetrically fixedly installed on the top plate 23, and a winding roller 44 is rotatably connected between the two rotating seats 43, and a sling 441 is wrapped and fixed on the winding roller 44, and the other end of the sling 441 is fixed to the top of the lifting seat 42.

[0045] Specifically, it should be noted that guide grooves are provided on both side walls of the sliding sleeve 25, and guide blocks are provided on the side walls of the support plates 22 on both sides close to the sliding sleeve 25 along their height. The guide blocks slide in the guide grooves to guide and limit the longitudinal lifting of the sliding sleeve 25.

[0046] Furthermore, a driving assembly 45 for controlling the rotation of the winding roller 44 is provided, which comprises: a connecting plate 451 arranged above the top plate 23, a bidirectional electric push rod 452 being fixedly connected to the connecting plate 451, and sliding grooves 453 are provided on the connecting plates 451 on both sides of the bidirectional electric push rod 452, and sliding brackets 454 are slidingly connected in the sliding grooves 453, and the sliding brackets 454 on each side are fixedly connected to the corresponding side output end of the bidirectional electric push rod 452, and the bottom ends of the two sliding brackets 454 extend toward the top plate 23 and are located on both sides of the winding roller 44, and the two sliding brackets 454 are rotatably connected to the side wall of the winding roller 44 with a clamping plate 455, and a driving motor 456 is fixedly installed on one side of the sliding bracket 454, and its output end is fixedly connected to the clamping plate 455 on this side.

[0047] Furthermore, guide blocks 457 are fixedly mounted on the side walls of the two abutting plates 455 facing the winding roller 44 , and guide slots 458 for accommodating the guide blocks 457 are formed on the side walls of the winding roller 44 .

[0048] Furthermore, a return spring 5 is sleeved on the outer side of the sliding rod 24 , one end of the return spring 5 abuts against the bottom wall of the top plate 23 , and the other end abuts against the top wall of the sliding sleeve 25 .

[0049] The working principle and use process of this utility model:

[0050] Place the placement plate 2 on the mold body 1, then move the bottom plate 21 so that the guide sleeve 31 moves to the position corresponding to the assembly hole 11, and insert the positioning pin body into the guide sleeve 31;

[0051] Then, the output ends of the two-way electric push rod 452 contract, pulling the sliding brackets 454 on both sides toward each other, and at the same time, making the two sides of the clamping plates 455 press tightly against the two ends of the winding roller 44, and the output end of the driving motor 456 drives the clamping plates 455 to rotate, and the clamping plates 455 drive the winding roller 44 to rotate to reel the sling 441, and the sling 441 pulls the lifting seat 42 to move upward in the cavity 41, and at the same time, the lifting seat 42 drives the sliding sleeve 25 to move upward synchronously through the connecting block 421;

[0052] When the sliding sleeve 25 moves up to the specified height, the two side pressing plates 455 move away from the winding roller 44. At this time, the compressed return spring 5 rebounds and cooperates with the weight of the sliding sleeve 25 to drive the sliding sleeve 25 to fall along the sliding rod 24, thereby causing the striking block 26 to hit the positioning pin body in the guide sleeve 31.

[0053] The sliding sleeve 25 is repeatedly controlled to rise and fall, thereby gradually driving the locating pin body into the assembly hole 11 .

[0054] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A positioning pin installation mechanism for thermoforming processing, characterized in that: include: A mold body (1) is provided with an assembly hole (11), wherein a positioning pin body is provided in the assembly hole (11); A placement plate (2) is detachably fixedly mounted on the top of the mold body (1), and a bottom plate (21) is slidably connected to the placement plate (2), one end of the bottom plate (21) extends toward one side of the placement plate (2), and two supporting plates (22) are symmetrically erected and fixedly mounted on the bottom plate (21), and a top plate (23) is fixedly mounted on the top ends of the two supporting plates (22); A sliding rod (24) is fixedly connected between the bottom plate (21) and the top plate (23); a sliding sleeve (25) is slidably connected to the outer side of the sliding rod (24); an extension block (251) is fixedly installed on the side wall of the sliding sleeve (25); and a striking block (26) is fixedly connected to the bottom wall of the extension block (251); A directional component (3) is provided on the bottom wall of the bottom plate (21) corresponding to the striking block (26), and the directional component (3) is used to vertically guide the positioning pin body struck into the assembly hole (11); A lifting mechanism (4) is also fixedly mounted on the top plate (23). The lifting mechanism (4) is movably connected to the sliding sleeve (25) and is used to lift the sliding sleeve (25) upward along the sliding rod (24).

2. A positioning pin installation mechanism for thermoforming processing according to claim 1, characterized in that: The directional component (3) comprises: A guide sleeve (31) is fixedly mounted on the bottom wall of the base plate (21) and is located on one side of the placement plate (2). A positioning pin body can be accommodated in the guide sleeve (31), and the striking block (26) can penetrate into the guide sleeve (31); A guide assembly (32) is provided on each side wall of the guide sleeve (31), and each set of the guide assembly (32) has: A plurality of rotation grooves (321) are provided on the side wall of the guide sleeve (31) along the height and longitudinal direction thereof. The plurality of rotation grooves (321) are arranged at intervals, and a rotation roller (322) is rotatably connected to each rotation groove (321) via a rotation axis. Part of the rotation roller (322) extends to the outside of the rotation groove (321) and fits on the outer wall of the positioning pin body in the guide sleeve (31).

3. The positioning pin installation mechanism for thermoforming processing according to claim 1, characterized in that: The pulling mechanism (4) comprises: The sliding rod (24) is a hollow structure, and a cavity (41) is provided inside the sliding rod (24). A strip groove connected to the cavity (41) is provided on the side wall of the sliding rod (24). A lifting seat (42) is provided in the cavity (41). A connecting block (421) that is slidably matched with the strip groove is fixedly connected to the side wall of the lifting seat (42). The connecting block (421) is fixedly connected to the inner side wall of the sliding sleeve (25); The top end of the sliding rod (24) passes through the top plate (23), and two rotating seats (43) are symmetrically fixedly installed on the top plate (23), and a winding roller (44) is rotatably connected between the two rotating seats (43). A sling (441) is wound and fixed on the winding roller (44), and the other end of the sling (441) is fixed to the top of the lifting seat (42).

4. A positioning pin installation mechanism for thermoforming processing according to claim 3, characterized in that: A driving assembly (45) for controlling the rotation of the winding roller (44) is also provided, which comprises: A connecting plate (451) is arranged above the top plate (23), a bidirectional electric push rod (452) is fixedly connected to the connecting plate (451), and sliding grooves (453) are opened on the connecting plate (451) on both sides of the bidirectional electric push rod (452), and sliding brackets (454) are slidably connected in the sliding grooves (453), and the sliding brackets (454) on each side are fixedly connected to the output end of the corresponding side of the bidirectional electric push rod (452); The bottom ends of the two sliding brackets (454) extend toward the top plate (23) and are located on both sides of the winding roller (44). The two sliding brackets (454) are connected to a clamping plate (455) that rotates toward the side wall of the winding roller (44). A driving motor (456) is fixedly installed on one side of the sliding bracket (454), and its output end is fixedly connected to the clamping plate (455) on this side.

5. A positioning pin installation mechanism for thermoforming processing according to claim 4, characterized in that: A guide plug (457) is fixedly mounted on the side walls of the two abutting plates (455) facing the winding roller (44), and a guide slot (458) for accommodating the guide plug (457) is provided on the side wall of the winding roller (44).

6. A positioning pin installation mechanism for thermoforming processing according to claim 5, characterized in that: A return spring (5) is also sleeved on the outer side of the sliding rod (24), one end of the return spring (5) abuts against the bottom wall of the top plate (23), and the other end abuts against the top wall of the sliding sleeve (25).

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