Aluminum foil PVC bag thermoforming mold

Abstract

This utility model relates to the field of packaging processing equipment technology and discloses a thermoforming mold for aluminum foil PVC bags. The mold includes a base plate, a support, a lifting rod, a lower mold, and an upper mold. A quick-installation mechanism is provided between the lifting rod and the upper mold. The mechanism includes a mounting box fixed to the lifting rod and a mounting post fixed to the upper mold and equipped with a limiting ring. A locking wedge block, abutted by a return spring, is provided inside the mounting box. The locking wedge block automatically engages with the limiting ring to lock the mounting post. A pull rod and a pull ring are connected to the locking wedge block for manual unlocking. A safety ring is rotatably connected to the pull rod to prevent accidental opening. Furthermore, a two-stage positioning mechanism consisting of a positioning post and a V-shaped positioning block is provided between the upper and lower molds. This utility model achieves tool-free quick insertion and removal of the upper mold, and, in conjunction with the guide locking structure of the lower mold, has the advantages of high mold replacement efficiency, stable and safe connection, and high mold closing positioning accuracy.

Description

Technical Field

[0001] This utility model relates to the field of packaging processing equipment technology, and in particular to a thermoforming mold for aluminum foil PVC bags. Background Technology

[0002] Aluminum foil PVC composite bags are widely used in the packaging of pharmaceuticals, food, and precision electronic products due to their excellent barrier properties and mechanical strength. In automated production lines for packaging bags, heat sealing is a crucial step, directly determining the bag's seal integrity and appearance quality. This process primarily relies on heat sealing molds, typically consisting of a lower mold fixed to a base and an upper mold connected to a lifting drive mechanism. The upper mold is repeatedly raised and lowered to close with the lower mold, and heating elements are used to heat-press the film material for sealing.

[0003] In actual production operations, with the increasing market demand for diversified packaging specifications, the same production line often needs to frequently switch between producing packaging bags of different sizes or shapes. This means that operators need to frequently change the thermoforming molds, especially the upper molds suspended on the lifting rods, which require frequent replacement. However, most existing thermoforming molds still use traditional bolt fastening or flange connection methods for the installation and connection of the upper mold.

[0004] This traditional fixing method reveals significant structural flaws when facing the need for frequent mold changes. When changing molds, operators must rely on specialized tools such as wrenches, spending considerable time disassembling and tightening each locking bolt individually. When installing a new mold, the bolts must be repositioned and tightened repeatedly. This process is not only cumbersome and labor-intensive, but more importantly, it significantly reduces the effective operating time of the equipment, leading to low production efficiency. Furthermore, because the heat-sealing mold operates in a high-frequency reciprocating motion, traditional bolt connections, without effective anti-loosening measures, are prone to loosening under long-term vibration, posing a safety hazard. Therefore, an aluminum foil PVC bag heat-sealing molding mold is proposed to solve these problems. Utility Model Content

[0005] In the existing technology, the connection between the upper mold and the lifting drive component of the aluminum foil PVC bag heat-forming mold during the production process is usually fastened with bolts or flanges. This results in a cumbersome and time-consuming disassembly and assembly process when changing the mold, which seriously affects production efficiency. Furthermore, the bolts are prone to loosening under long-term high-frequency vibration conditions, thus reducing reliability and safety. This utility model aims to provide an aluminum foil PVC bag heat-forming mold with an improved structure, quick disassembly and assembly function, and a stable connection, so as to effectively solve the above problems.

[0006] This utility model provides a thermoforming mold for aluminum foil PVC bags, comprising: a base plate, and a bracket vertically fixed to the top surface of the base plate, a lifting rod installed on the bracket, a lower mold installed on the top surface of the base plate, an upper mold connected to the output end of the lifting rod, the upper mold being positioned opposite the lower mold; and a quick-installation mechanism disposed between the lifting rod and the upper mold.

[0007] The quick-installation mechanism features a specific structure enabling tool-less plug-and-play locking and unlocking. It includes a mounting box fixedly connected to the bottom end of the lifting rod and a mounting post fixedly connected to the center of the top surface of the upper mold. The outer peripheral wall of the mounting post has an integrally formed protruding limiting ring. The top surface of the limiting ring is configured as a guide slope to facilitate insertion, and the bottom surface is configured as a locking plane for bearing force. The mounting box has an internal mounting cavity containing symmetrically distributed locking wedges that slide within it. A return spring abuts against the outer wall of each locking wedge and the inner wall of the mounting cavity, providing a spring force to return the locking wedges to the center. The inner surface of each locking wedge has a pressing slope adapted to the guide slope and a recess that mates with the locking plane, allowing it to automatically retract when the mounting post is inserted and automatically lock in place.

[0008] Furthermore, the lifting rod, the upper mold, and the quick-installation mechanism are combined via a mechanically linked unlocking assembly. A pull rod is fixedly connected to the side of the locking wedge away from the mounting post. The pull rod slides through the side wall of the mounting box and extends to the outside of the mounting box. A pull ring is fixedly connected to the end of the pull rod located outside the mounting box. The pull ring is configured to allow the operator to apply force to drive the locking wedge to slide outward against the spring force of the return spring, thereby disengaging the recess of the locking wedge from the limiting ring, releasing the restriction on the mounting post, and enabling the quick disassembly of the upper mold.

[0009] Preferably, to prevent accidental opening of the locking mechanism due to accidental contact with the pull ring or vibration during equipment operation, a limiting plate is fixedly connected to the outer wall of the mounting box. The limiting plate is located above the pull rod, and a safety ring is rotatably connected to the outer circumferential surface of the pull rod. A protrusion is formed on the outer circumferential surface of the safety ring, and a limiting groove adapted to the protrusion is provided on the limiting plate. By rotating the safety ring, the protrusion can be engaged into the limiting groove to lock the axial position of the pull rod, providing a double safety function.

[0010] Preferably, to facilitate the installation and alignment of the lower mold, the top surface of the base plate is provided with an installation groove, and guide blocks are fixedly connected to the inner walls of both sides of the installation groove. Guide grooves that slidably engage with the guide blocks are provided on both sides of the lower mold. The lower mold can be smoothly slidably installed on the base plate along its length direction via the guide grooves and the guide blocks.

[0011] Preferably, to ensure the absolute fixation of the lower mold in the working position, a slider is fixedly connected to the top surface of the base plate and to the side of the mounting groove. A positioning pin slides through the slider, and a positioning hole adapted to the positioning pin is opened on the side wall of the lower mold, allowing the end of the positioning pin to be inserted into the positioning hole. Furthermore, a fastening bolt is threaded through the top surface of the slider, and the bottom end of the fastening bolt abuts against the outer circumferential surface of the positioning pin to eliminate clearance and prevent the lower mold from shaking during mold closing.

[0012] Preferably, to improve mold closing accuracy and ensure heat sealing quality, a positioning mechanism is provided between the lower mold and the upper mold. The positioning mechanism includes positioning posts fixedly connected to the four corners of the top surface of the lower mold, and insertion holes with corresponding positions and diameters on the bottom surface of the upper mold. During mold closing, the positioning posts are inserted into the insertion holes first for preliminary coarse positioning of the upper mold.

[0013] Preferably, to further improve positioning accuracy and eliminate slight horizontal deviations, the positioning mechanism further includes a positioning block fixedly connected to the side of the upper mold and a guide slide fixedly connected to the side of the lower mold. The bottom of the positioning block has an inverted triangular structure, and the top surface of the guide slide has a V-shaped guide groove that matches the shape of the positioning block. In the mold-closed state, the positioning block is precisely embedded in the V-shaped guide groove, achieving precise positioning through wedge-shaped engagement.

[0014] Preferably, a heating plate is fixedly installed on the bottom surface of the upper mold. The heating plate is located in the area enclosed by the positioning columns and is used to heat and press the aluminum foil PVC composite roll placed on the lower mold to complete the thermoforming process.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model, by setting a quick installation mechanism including an installation column, a limit ring, a locking wedge and a return spring between the lifting rod and the upper mold, realizes the tool-less plug-and-play installation and disassembly of the upper mold, which solves the problem that mold replacement in the prior art relies on bolt tightening, which is cumbersome and time-consuming, and greatly improves the efficiency of mold replacement and production efficiency.

[0017] 2. This utility model, through the design of the pull rod and safety ring in the quick-installation mechanism, realizes the physical locking of the pull rod, solves the safety hazard of the locking mechanism being accidentally released due to vibration or accidental contact in the existing quick-connect structure, and improves the operational stability and safety of the equipment in high-speed or high-vibration environments.

[0018] 3. This utility model achieves dual and graded guiding positioning during the mold closing process by setting a coarse positioning structure consisting of positioning pins and insertion holes and a precise positioning structure consisting of positioning blocks and guide slides between the upper and lower molds. This solves the problem in the prior art that the lack of a high-precision alignment structure easily leads to mold closing deviation and unstable product heat sealing quality, thus ensuring the consistency of product molding and yield rate.

[0019] 4. This utility model solves the problem of insufficient fixation of the lower mold by using a sliding installation of guide blocks and a fixing method of positioning pins and fastening bolts. This ensures that the lower mold can maintain a precise position without shaking when subjected to mold closing pressure and hot pressing, and further improves the stability and precision of thermoforming. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the aluminum foil PVC bag thermoforming mold proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of the lifting rod of the aluminum foil PVC bag thermoforming mold proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of the locking wedge block of the aluminum foil PVC bag thermoforming mold proposed in this utility model;

[0023] Figure 4 This is a schematic diagram of the positioning pin of the thermoforming mold for aluminum foil PVC bags proposed in this utility model.

[0024] Legend:

[0025] 1. Base plate; 2. Bracket; 3. Lower mold; 4. Upper mold; 5. Heating plate; 6. Quick installation mechanism; 61. Mounting box; 62. Mounting post; 63. Limiting ring; 64. Locking wedge; 65. Return spring; 66. Limiting plate; 67. Pull rod; 68. Pull ring; 69. Safety ring; 7. Positioning mechanism; 71. Positioning block; 72. Guide slide; 73. Guide block; 74. Positioning post; 75. Positioning pin; 76. Positioning hole; 77. Slider; 78. Fastening bolt; 8. Lifting rod. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example:

[0028] Reference Figures 1 to 4 This utility model provides a thermoforming mold for aluminum foil PVC bags, which aims to solve the technical problems of cumbersome and time-consuming mold replacement and unstable sealing quality caused by low mold closing positioning accuracy in existing molds.

[0029] The aluminum foil PVC bag thermoforming mold includes a base plate 1 and a support 2 vertically fixed to the top surface of the base plate 1. The base plate 1 serves as the supporting base of the entire device. The support 2 is L-shaped and vertically fixed to the top surface of the base plate 1, providing stable support for the lifting mechanism. A lifting rod 8 is installed on the support 2. The lifting rod 8 is vertically installed below the cantilever end of the support 2, with the output end of the lifting rod 8 facing downwards, to provide the power and displacement required for mold closing. A lower mold 3 is installed on the top surface of the base plate 1. An upper mold 4 is connected to the output end of the lifting rod 8. The upper mold 4 and the lower mold 3 are on the same vertical axis. The upper mold 4 is set directly opposite the lower mold 3 and can cooperate with the lower mold 3 to close when the upper mold 4 descends.

[0030] A heating plate 5 is fixedly connected to the bottom surface of the upper mold 4 by bolts. The bottom surface of the heating plate 5 is flat. The size of the heating plate 5 is adapted to the cavity size of the lower mold 3. It is used to heat-form the aluminum foil PVC composite roll placed on the lower mold 3. A quick installation mechanism 6 is provided between the lifting rod 8 and the upper mold 4. The quick installation mechanism 6 includes an installation box 61 fixedly connected to the bottom end of the lifting rod 8 and an installation column 62 fixedly connected to the center of the top surface of the upper mold 4. The quick installation mechanism 6 realizes the quick disassembly and assembly connection between the upper mold 4 and the lifting rod 8, thereby facilitating the replacement of upper molds 4 of different specifications to meet the production needs of different products.

[0031] The top outer circumference of the mounting post 62 is integrally formed with a protruding limiting ring 63. The top surface of the limiting ring 63 is designed as a guide slope to facilitate smooth insertion during installation. The bottom surface of the limiting ring 63 is designed as a locking plane to form a snap-fit ​​with the locking component to prevent the mounting post 62 from falling off. The mounting box 61 has an installation cavity inside, and symmetrically distributed locking wedges 64 are slidably connected in the installation cavity. A return spring 65 is fixedly connected between the outer wall of each locking wedge 64 and the inner wall of the installation cavity. The return spring 65 is always in a compressed or compressive state to continuously apply a center-oriented pushing force to the locking wedge 64. The inner side of the locking wedge 64 is provided with a pressing slope that matches the guide slope and a recess that matches the locking plane.

[0032] When the mounting post 62 is inserted into the mounting cavity, the guide slope of the limiting ring 63 presses against the pressing slope of the locking wedge 64, forcing the locking wedge 64 to overcome the resistance of the return spring 65 and slide outward. After the limiting ring 63 passes the locking wedge 64, the locking wedge 64 rebounds under the action of the return spring 65, so that the concave part of the locking wedge 64 locks the limiting ring 63. At this time, the bottom surface of the locking wedge 64 abuts against the locking plane of the limiting ring 63, thereby firmly locking the mounting post 62 in the mounting box 61 and realizing the rapid fixation of the upper mold 4.

[0033] A pull rod 67 is fixedly connected to the side of the locking wedge 64 away from the mounting post 62. The pull rod 67 slides horizontally through the side wall of the mounting box 61 and extends to the outside. A pull ring 68 is fixedly connected to the end of the pull rod 67 located outside the mounting box 61. The pull ring 68 is configured to drive the locking wedge 64 to slide outward against the elastic force of the return spring 65. When the pull ring 68 is pulled outward, the pull rod 67 drives the locking wedge 64 to move outward, so that the concave part of the locking wedge 64 disengages from the limiting ring 63, releasing the restriction on the limiting ring 63, thereby allowing the mounting post 62 to be pulled out of the mounting box 61, realizing the quick disassembly of the upper mold 4.

[0034] A limiting plate 66 is fixedly connected to the outer wall of the mounting box 61. The limiting plate 66 is located above the pull rod 67. A safety ring 69 is rotatably connected to the outer circumference of the pull rod 67. A limiting protrusion is provided on the outer periphery of the safety ring 69. A limiting groove that matches the size of the limiting protrusion is provided on the limiting plate 66. When the upper mold 4 is installed in place, the limiting protrusion is locked into the limiting groove by rotating the safety ring 69. At this time, the pull rod 67 is locked and cannot move axially, thereby preventing the locking wedge block 64 from being accidentally released due to accidental contact with the pull ring 68 or equipment vibration, thus ensuring safety during the production process.

[0035] In a preferred embodiment, a positioning mechanism 7 is provided between the lower mold 3 and the upper mold 4. The positioning mechanism 7 includes positioning posts 74 that are vertically fixedly connected to the four corners of the top surface of the lower mold 3. The bottom surface of the upper mold 4 has four insertion holes that correspond to the positions of the positioning posts 74 and have matching diameters. The positioning posts 74 are used to be inserted into the insertion holes to perform coarse positioning of the upper mold 4 in the initial stage of mold closing. The positioning mechanism 7 also includes a positioning block 71 fixedly connected to the side of the upper mold 4 and a guide slide 72 fixedly connected to the side of the lower mold 3. The bottom of the positioning block 71 is designed with an inverted triangular structure. The top surface of the guide slide 72 has a V-shaped guide groove that matches the shape of the positioning block 71. In the final stage of mold closing, the positioning block 71 can be accurately embedded in the V-shaped guide groove of the guide slide 72. The wedge-shaped fit eliminates the horizontal gap and achieves precise positioning of the upper mold 4 and the lower mold 3.

[0036] In a preferred embodiment, the top surface of the base plate 1 has two parallel mounting slots. Guide blocks 73 are fixedly connected to the inner walls on both sides of each mounting slot. Guide grooves that slide in cooperation with the guide blocks 73 are provided on the two sides of the bottom of the lower mold 3. The lower mold 3 is slidably mounted on the base plate 1 along the length of the guide blocks 73 through the guide grooves. A slider 77 is fixedly connected to the top surface of the base plate 1 and next to the mounting slots. A positioning pin 75 is horizontally slidably passed through the slider 77. A positioning hole 76 that matches the positioning pin 75 is provided on the side wall of the lower mold 3. The end of the positioning pin 75 can be inserted into the positioning hole 76 to limit the position of the lower mold 3. A fastening bolt 78 is threaded through the top surface of the slider 77. The bottom end of the fastening bolt 78 can be tightened and abuts against the outer circumferential surface of the positioning pin 75. The clamping action of the fastening bolt 78 on the positioning pin 75 prevents the positioning pin 75 from loosening and ensures that the lower mold 3 remains fixed and does not shift during the production process.

[0037] The implementation principle of this application embodiment is as follows: First, the upper mold 4 is installed. The operator aligns the mounting post 62 on the top surface of the upper mold 4 with and inserts it into the mounting box 61 at the bottom of the lifting rod 8 mounted on the bracket 2. During the insertion process, the guide slope at the top of the upper limit ring 63 of the mounting post 62 contacts and presses the pressing slope of the locking wedge 64, forcing the locking wedge 64 in the quick installation mechanism 6 on both sides to overcome the elastic force of the return spring 65 and slide outward. When the limit ring 63 passes the locking wedge 64, After step 4, the locking wedge 64 returns to its original position under the restoring force of the return spring 65, causing the recess of the locking wedge 64 to engage with the limiting ring 63 and abut against the locking plane, thereby achieving automatic locking and fixing of the upper mold 4. Subsequently, the operator rotates the safety ring 69 sleeved on the pull rod 67, causing the protrusion on the safety ring 69 to rotate into the limiting groove on the limiting plate 66, locking the axial position of the pull rod 67, preventing the locking wedge 64 from being accidentally released due to production vibration or accidental contact with the pull ring 68, and ensuring connection safety.

[0038] Next, the lower mold 3 is installed and fixed. The lower mold 3 is slid into the predetermined position along the guide block 73 on the base plate 1 through the guide groove at the bottom. The positioning pin 75 on the slider 77 installed in the positioning mechanism 7 next to the installation groove is pushed so that the end of the positioning pin 75 is inserted into the positioning hole 76 on the side wall of the lower mold 3 to limit the position of the lower mold 3. Then, the fastening bolt 78 on the top surface of the slider 77 is tightened so that the bottom end of the fastening bolt 78 abuts against the outer circumferential surface of the positioning pin 75, eliminating the loose gap of the positioning pin 75, and firmly locking the lower mold 3 on the base plate 1.

[0039] In the heat-sealing production stage, the operator lays the aluminum foil PVC composite roll to be processed flat on the lower mold 3, starts the heating plate 5 to preheat to the set temperature, and controls the lifting rod 8 to drive the upper mold 4 to descend vertically for mold closing. During the mold closing process, the positioning pins 74 at the four corners of the top surface of the lower mold 3 are inserted into the corresponding insertion holes on the bottom surface of the upper mold 4 first, realizing the initial rough positioning of the two molds. As the upper mold 4 continues to descend, the inverted triangular positioning blocks 71 on the side of the upper mold 4 gradually cut into the V-shaped guide groove of the guide slide seat 72 on the side of the lower mold 3. The wedge-shaped fit eliminates the slight deviation in the horizontal direction, realizing high-precision fine positioning. After the mold is closed, the heating plate 5 applies pressure to heat-seal the roll. After the molding is completed, the lifting rod 8 drives the upper mold 4 to return to its original position and rise, and the finished product is taken out.

[0040] When it is necessary to replace the upper mold 4 with a different specification, rotate the safety ring 69 in the opposite direction so that its protrusion disengages from the limiting groove of the limiting plate 66, and pull the pull ring 68 outward. The pull ring 68 drives the locking wedge block 64 to overcome the resistance of the return spring 65 and move outward through the pull rod 67, so that the locking wedge block 64 disengages from the limiting ring 63 and releases the locking restriction on the mounting post 62. At this time, the upper mold 4 can be pulled out downward to complete the disassembly.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An aluminum foil PVC bag heat-seal forming mold comprising: The base plate (1) and the bracket (2) vertically fixed to the top surface of the base plate (1), the bracket (2) is equipped with a lifting rod (8), the top surface of the base plate (1) is equipped with a lower mold (3), and the output end of the lifting rod (8) is connected to an upper mold (4). The feature is that a quick installation mechanism (6) is provided between the lifting rod (8) and the upper mold (4), the quick installation mechanism (6) includes an installation box (61) fixedly connected to the bottom end of the lifting rod (8), and an installation column (62) fixedly connected to the top surface of the upper mold (4). The outer peripheral wall of the mounting post (62) is integrally formed with a protruding limiting ring (63), the top surface of the limiting ring (63) forms a guide slope, and the bottom surface of the limiting ring (63) forms a locking plane. The mounting box (61) has a mounting cavity inside, and symmetrically distributed locking wedges (64) are slidably fitted inside the mounting cavity. A return spring (65) abuts between the outer wall of the locking wedge (64) and the inner wall of the mounting cavity. The inner side of the locking wedge (64) has a pressing slope that matches the guide slope and a recess that matches the locking plane.

2. The aluminum foil PVC bag heat-seal forming mold according to claim 1, characterized by, A pull rod (67) is fixedly connected to the side of the locking wedge (64) away from the mounting post (62). The pull rod (67) slides through the side wall of the mounting box (61) and extends to the outside of the mounting box (61). A pull ring (68) is fixedly connected to the end of the pull rod (67) located outside the mounting box (61). The pull ring (68) is configured to drive the locking wedge (64) to slide outward against the elastic force of the return spring (65) to release the restriction on the limiting ring (63). A limiting plate (66) is fixedly connected to the outer wall of the mounting box (61). A safety ring (69) is rotatably connected to the outer circumferential surface of the pull rod (67). A protrusion is formed on the outer circumferential surface of the safety ring (69). A limiting groove adapted to the protrusion is opened on the limiting plate (66). After the safety ring (69) rotates, the protrusion is inserted into the limiting groove to lock the pull rod (67).

3. The aluminum foil PVC bag heat-seal forming mold according to claim 1, characterized by, The top surface of the base plate (1) is provided with an installation groove, and guide blocks (73) are fixedly connected to the inner walls on both sides of the installation groove. The lower mold (3) is provided with guide grooves on both sides that slide with the guide blocks (73). The lower mold (3) is slidably installed on the base plate (1) through the guide grooves and the guide blocks (73).

4. The aluminum foil PVC bag thermoforming mold according to claim 3, characterized in that, A slider (77) is fixedly connected to the top surface of the base plate (1) and to the side of the mounting groove. A positioning pin (75) is slidably passed through the slider (77). A positioning hole (76) adapted to the positioning pin (75) is opened on the side wall of the lower mold (3). The end of the positioning pin (75) is inserted into the positioning hole (76).

5. The aluminum foil PVC bag heat-seal forming mold according to claim 4, characterized by, The top surface of the slider (77) is threaded with a fastening bolt (78), and the bottom end of the fastening bolt (78) abuts against the outer circumferential surface of the positioning pin (75) to prevent the lower mold (3) from shaking during the mold closing process.

6. The aluminum foil PVC bag heat-seal forming mold according to claim 1, characterized by, A positioning mechanism (7) is provided between the lower mold (3) and the upper mold (4). The positioning mechanism (7) includes positioning posts (74) fixedly connected to the four corners of the top surface of the lower mold (3). The bottom surface of the upper mold (4) is provided with insertion holes that correspond to the position of the positioning posts (74) and have a matching diameter. The positioning posts (74) are used to perform rough positioning of the upper mold (4) during the mold closing process.

7. The aluminum foil PVC bag thermoforming mold according to claim 6, characterized in that, The positioning mechanism (7) further includes a positioning block (71) fixedly connected to the side of the upper mold (4) and a guide slide (72) fixedly connected to the side of the lower mold (3). The bottom of the positioning block (71) is in the shape of an inverted triangle. The top surface of the guide slide (72) is provided with a V-shaped guide groove that matches the shape of the positioning block (71). The positioning block (71) is embedded in the V-shaped guide groove when the mold is closed.

8. The aluminum foil PVC bag thermoforming mold according to claim 6, characterized in that, A heating plate (5) is fixedly installed on the bottom surface of the upper mold (4). The heating plate (5) is located in the area enclosed by the positioning column (74) and is used to heat-form the aluminum foil PVC composite roll placed on the lower mold (3).

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