A plastic cover plate in-mold cutting injection mold structure

Abstract

The application provides a plastic cover in-mold cutting injection mold structure, which comprises an upper mold and a lower mold. An upper mold cavity is formed on one side of the upper mold facing the lower mold. A lower mold cavity is formed on one side of the lower mold facing the upper mold. When the upper mold and the lower mold are in contact, a mold cavity is formed between the upper mold cavity and the lower mold cavity. The upper mold is provided with a gate communicating with the mold cavity. The lower mold is provided with a flow channel. One end of the flow channel communicates with the gate, and the other end communicates with the mold cavity. The lower mold is provided with a mounting groove. A clamping block between the flow channel and the mold cavity is fixedly connected in the mounting groove. The clamping block is provided with a communication groove communicating with the flow channel. A cutter is slidably connected on the clamping block. The cutter is connected with a supporting rod through a connecting structure. The lower mold is provided with a power mechanism for driving the supporting rod to move towards the upper mold. The process of manual cutting is avoided, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to injection molds, and more particularly, to an in-mold injection mold structure for a plastic cover plate. Background Technology

[0002] Injection molding is the main molding equipment used to make various shapes of plastic products from thermoplastic or thermosetting materials using plastic molds. Injection molding is achieved through injection molds.

[0003] Currently, Chinese patent CN218488980U discloses an injection mold, which includes a mold body and an injection runner disposed within the mold body. The mold body includes a conformal cooling water channel assembly and multiple molding cavities. Each molding cavity can mold a product to be injection molded, and each molding cavity is connected to the injection runner. The conformal cooling water channel assembly includes multiple accompanying cooling water channels, which enclose a cooling area. At least a portion of the injection runner is placed within the cooling area.

[0004] The accompanying cooling water channels are evenly distributed near the injection runner and cool key areas of the injection runner to improve the cooling effect, effectively ensure the consistency of the flow of the injection liquid in the injection runner, thereby keeping the pouring rate consistent, improving the quality of the injection molded product, and ensuring the consistency of the quality of the injection molded product.

[0005] When the finished product produced by this injection mold is a plastic cover plate, since the surface of the plastic cover plate is not allowed to have weld lines, the number of gates should be as small as possible and the cross-sectional area of ​​the gates should be large. After the product is injection molded, a protrusion is formed on the gate that is integrated with the product. This requires the worker to cut the protrusion off the product with scissors. However, because the protrusion is relatively thick, the cutting process is quite laborious. Summary of the Invention

[0006] In view of this, the purpose of this invention is to provide an in-mold injection mold structure for plastic cover plates, which eliminates the manual cutting process and greatly improves production efficiency.

[0007] To solve the above-mentioned technical problems, the technical solution of the present invention is: a plastic cover plate in-mold injection mold structure, including an upper mold and a lower mold. The upper mold has an upper mold cavity on the side facing the lower mold, and the lower mold has a lower mold cavity on the side facing the upper mold. When the upper mold and the lower mold abut against each other, a cavity is formed between the upper mold cavity and the lower mold cavity. The upper mold has a gate communicating with the cavity, and the lower mold has a runner. One end of the runner communicates with the gate, and the other end communicates with the cavity. The lower mold has an installation groove, and an insert located between the runner and the cavity is fixedly connected in the installation groove. The insert has a communicating groove communicating with the runner. A cutter is slidably connected to the insert. The cutter is connected to a support rod through a connecting structure. The lower mold is provided with a power mechanism for driving the support rod to move closer to the upper mold.

[0008] To achieve the above technical solution, molten plastic enters the runner from the gate, passes through the insert and connecting groove, and is injected into the cavity. After the injection molding and holding pressure is completed, a protrusion is formed on the outside of the product. The power mechanism is activated, and the cutter is moved through the support rod to cut off the protrusion. Then the upper mold is moved away from the lower mold, and the product can be taken out from the cavity, eliminating the need for manual cutting with scissors and greatly improving production efficiency.

[0009] As a preferred embodiment of the present invention, the connection structure includes a mounting hole, a locking sleeve, a first elastic element, a clamping plate, a top post, and a T-shaped plate. One end of the T-shaped plate is fixed to the lower end of the cutter. The mounting hole is opened at the upper end of the support rod. The middle part of the clamping plate is hinged in the mounting hole, and the two clamping plates are arranged opposite to each other. The top post is fixed to the end of the mounting hole and located between the two clamping plates. Both ends of the first elastic element are fixedly connected to the two clamping plates respectively. The top post and the clamping plates form a clamping area for clamping the T-shaped plate. The locking sleeve is threaded to the outer wall of the support rod. The locking sleeve moves away from the cutter and the clamping plate and the T-shaped plate are pressed together by a linkage component.

[0010] To achieve the above technical solution, the T-shaped plate is fixed to the lower end of the cutter, the T-shaped plate is placed on the top column, the locking sleeve is rotated, and the locking sleeve moves away from the cutter. Through the linkage component, the clamping plate is flipped along the hinge, and the T-shaped plate is pressed against the top column, thereby realizing the installation of the cutter. Similarly, by moving the locking sleeve towards the cutter, the clamping plate can be separated from the T-shaped plate, so as to replace the damaged cutter.

[0011] As a preferred embodiment of the present invention, the linkage component includes a straight rod, an annular groove, a straight slot, and a pressure block. The straight slot is formed on the support rod and communicates with the mounting hole. The annular groove is formed on the inner wall of the lock sleeve and is coaxially arranged with the lock sleeve. The straight rod passes through the straight slot and its two ends are located in the annular groove. The pressure block is fixed to the middle of the straight rod and is used to abut against the end of the clamping plate away from the T-shaped plate.

[0012] To achieve the above technical solution, the locking sleeve is rotated and moved away from the cutter, causing the inner wall of the annular groove to push the straight rod along the length of the groove. The straight rod drives the pressure block to move synchronously, and the pressure block abuts against the lower end of the clamping plate, thereby causing the clamping plate to flip along the hinge and press against the T-shaped plate. At the same time, the first elastic element is stretched. Similarly, the locking sleeve is rotated and moved closer to the cutter, causing the inner wall of the annular groove to push the straight rod closer to the cutter, thereby causing the pressure block to separate from the clamping plate. The elastic force of the first elastic element causes the clamping plate to flip and separate from the T-shaped plate, so as to facilitate the replacement of the damaged cutter.

[0013] In a preferred embodiment of the present invention, the upper mold has a knife storage groove along its length for placing a cutter. The cutter is connected to the inner wall of the knife storage groove through a limiting structure. The upper mold has a connecting groove communicating with the knife storage groove on the side facing the lower mold. The connecting groove is located in the middle of the knife storage groove. The cutter passes through the connecting groove and is placed in the knife storage groove. A sealing plate is hinged to the end of the connecting groove away from the knife storage groove. The sealing plate is connected to the inner wall of the connecting groove through a spring piece.

[0014] To achieve the above technical solution, a new cutter is placed in the cutter storage slot. The new cutter is limited by a limiting structure. The power mechanism is activated, and the damaged cutter pushes open the sealing plate and passes through the connecting slot before being placed in the cutter storage slot. After the connecting structure separates from the T-shaped plate, the new cutter is pushed. The new cutter pushes the damaged cutter off the top post, making the new cutter correspond to the top post. Then, it is connected to the new cutter through the connecting structure, so as to facilitate the replacement of the cutter and eliminate the need to disassemble the lower mold to replace the cutter.

[0015] As a preferred embodiment of the present invention, the limiting structure includes a limiting groove and a limiting strip. The limiting groove is formed on the side wall of the cutter and is arranged along the length direction of the cutter. The limiting strip is fixed to the inner wall of the knife storage groove. The length direction of the limiting strip is parallel to the length direction of the knife storage groove. The limiting strip is slidably connected in the limiting groove. The limiting strip is made of fluororubber, and two limiting strips are arranged opposite to each other.

[0016] To achieve the above technical solution, a new cutter is placed in the blade storage groove, and a limiting strip is slidably connected to the limiting groove, so that the new cutter can move along the length direction of the blade storage groove to contact the damaged cutter, thereby separating the damaged cutter from the top post and aligning the new cutter with the top post; fluororubber has strong thermal stability, is not easily damaged by high temperature, and has a long service life.

[0017] In a preferred embodiment of the present invention, a sliding hole is provided on the side wall of the upper mold, and a drive rod is slidably connected in the sliding hole. The drive rod moves along its own length direction and drives the locking sleeve to rotate through the drive assembly.

[0018] To achieve the above technical solution, when the damaged cutter is located in the knife storage groove or moves along the connecting groove, the drive rod is pushed. The drive rod moves along the length direction of the sliding hole and rotates the locking sleeve through the drive assembly, so that the damaged cutter is separated from the clamping plate. This eliminates the need for workers to put their hands into the mold and avoids burns to their hands.

[0019] In a preferred embodiment of the present invention, the drive assembly includes a rack and a toothed ring. The toothed ring is fixed to the outer wall of the lock sleeve and is coaxially arranged with the lock sleeve. The rack is fixed to the outer wall of the drive rod and is arranged along the length direction of the drive rod. The rack is used to mesh with the toothed ring.

[0020] To achieve the above technical solution, the drive rod is moved along its own length direction, so that the rack and the toothed ring come into contact, and the rack drives the toothed ring to rotate, which in turn drives the lock sleeve to rotate, thereby allowing the clamping plate to move away from or towards the T-shaped plate.

[0021] As a preferred embodiment of the present invention, the upper mold is provided with a linkage groove, the two ends of the linkage groove are respectively connected to a sliding hole and a tool storage groove, a linkage rod is slidably connected in the linkage groove, the lower end of the linkage rod is connected to a drive rod, and the upper end of the linkage rod abuts against the T-shaped plate through a pushing structure.

[0022] To achieve the above technical solution, the drive rod moves along its own length direction. The drive rod causes the locking sleeve to rotate through the drive assembly, so that the clamping plate separates from the T-shaped plate. As the drive rod continues to move, the linkage rod pushes against the T-shaped plate through the push structure, so that the new cutter moves along the knife storage groove, so that the new cutter pushes open the damaged cutter by itself, and so that the new cutter aligns with the top post.

[0023] As a preferred embodiment of the present invention, the pushing structure includes a push plate, a stop block, and a second elastic member. The push plate is hinged to the upper end of the linkage rod. The two ends of the second elastic member are respectively connected to the push plate and the drive rod. The stop block is fixed to the upper end of the linkage rod and is used to abut against the push plate. The push plate is used to abut against the T-shaped plate.

[0024] To achieve the above technical solution, the drive rod is moved forward, and the locking sleeve is rotated through the drive assembly. After the clamping plate separates from the T-shaped plate, the drive rod is continued to be pushed. The push plate moves the T-shaped plate due to its contact with the stop block, so that the new cutter moves synchronously with the T-shaped plate to align the T-shaped plate with the top post. Then, the drive rod is moved backward, and the locking sleeve is rotated through the drive assembly so that the clamping plate presses against the T-shaped plate, positioning the new cutter. At the same time, after the push plate contacts the T-shaped plate, it flips along the hinge, so that the push plate is located on the side of the T-shaped plate facing the opening of the sliding hole, so that the cutter can be replaced next time.

[0025] In a preferred embodiment of the present invention, a limiting disk is fixedly connected to the end of the drive rod, and the limiting disk is used to abut against the side wall of the upper mold.

[0026] The above technical solution facilitates the movement of the drive rod and ensures that the center of the new cutter aligns with the axis of the support rod when the limiting plate contacts the side wall of the upper mold. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 To illustrate the structural diagram of the lower mold; Figure 3 To illustrate the structure of the cutter; Figure 4 for Figure 3 Enlarged view of point A; Figure 5 To illustrate the structural diagram of the drive component; Figure 6 A schematic diagram illustrating the connection structure; Figure 7 To illustrate the location of the top column; Figure 8 A schematic diagram showing the location of the linkage slot; Figure 9 A cross-sectional diagram of the lock sleeve is provided. Figure 10 To illustrate the structural diagram of the sealing plate; Figure 11 A three-dimensional schematic diagram to illustrate the limiting strip.

[0028] Reference numerals: 1. Protrusion; 11. Upper mold; 12. Lower mold; 13. Gate; 14. Runner; 2. Insert; 21. Connecting groove; 22. Cutting tool; 3. Support rod; 31. Power mechanism; 4. Connecting structure; 41. Mounting hole; 42. Locking sleeve; 43. First elastic element; 45. Clamping plate; 46. Top pillar; 47. T-shaped plate; 5. Linkage assembly; 51. Straight rod; 52. Annular groove; 53. Straight groove; 54. 6. Pressure block; 71. Tool storage groove; 72. Limiting groove; 73. Limiting strip; 74. Guide slope; 85. Connecting groove; 86. Sealing plate; 87. Spring piece; 98. Sliding hole; 99. Drive rod; 90. Drive assembly; 91. Rack; 92. Gear ring; 100. Linkage groove; 101. Linkage rod; 102. Pushing structure; 103. Push plate; 104. Stop block; 105. Second elastic element; 200. Limiting plate. Detailed Implementation

[0029] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and mastered.

[0030] A plastic cover plate in-mold injection molding structure includes an upper mold 11 and a lower mold 12; an upper mold cavity is provided on the side of the upper mold 11 facing the lower mold 12, and a lower mold cavity is provided on the side of the lower mold 12 facing the upper mold 11; when the upper mold 11 and the lower mold 12 abut against each other, a cavity is formed between the upper mold cavity and the lower mold cavity.

[0031] The upper mold 11 has a gate 13 that communicates with the cavity, and the lower mold 12 has a runner 14. One end of the runner 14 communicates with the gate 13, and the other end communicates with the cavity.

[0032] A mounting groove is provided in the lower mold 12, and an insert 2 located between the runner 14 and the cavity is fixedly connected in the mounting groove. A connecting groove 21 communicating with the runner 14 is provided in the insert 2. A cutter 22 is slidably connected to the insert 2, and a support rod 3 is connected to the cutter 22 through a connecting structure 4. The support rod 3 is slidably connected in the lower mold 12. The lower mold 12 is provided with a power mechanism 31 for driving the support rod 3 to move closer to the upper mold 11. The power mechanism 31 is a cylinder.

[0033] The connecting structure 4 includes a mounting hole 41, a locking sleeve 42, a first elastic element 43, a clamping plate 45, a top post 46, and a T-shaped plate 47. One end of the T-shaped plate 47 is fixed to the lower end of the cutter 22, and the T-shaped plate 47 is located in the middle of the cutter 22. The mounting hole 41 is opened at the upper end of the support rod 3, and the middle part of the clamping plate 45 is hinged in the mounting hole 41, with the two clamping plates 45 arranged opposite each other. The clamping plate 45 is U-shaped. The top post 46 is fixed to the end of the mounting hole 41 and located between the two clamping plates 45; the top post 46 is coaxial with the support rod 3.

[0034] The first elastic element 43 is fixedly connected to two clamping plates 45 at both ends. The first elastic element 43 is a tension spring, which causes the lower ends of the two clamping plates 45 to move closer to each other. The top column 46 and the two clamping plates 45 form a clamping area for holding the T-shaped plate 47. The locking sleeve 42 is threaded to the outer wall of the support rod 3. The locking sleeve 42 moves away from the cutter 22 and, through the linkage assembly 5, causes the clamping plate 45 to abut against the T-shaped plate 47. When the locking sleeve 42 moves closer to the cutter 22, the clamping plate 45 separates from the T-shaped plate 47.

[0035] The linkage assembly 5 includes a straight rod 51, an annular groove 52, a straight groove 53, and a pressure block 54. The straight groove 53 is formed on the support rod 3 and communicates with the mounting hole 41; the length direction of the straight groove 53 is parallel to the length direction of the support rod 3. The annular groove 52 is formed on the inner wall of the locking sleeve 42 and is coaxially arranged with the locking sleeve 42. The straight rod 51 passes through the straight groove 53, with both ends located within the annular groove 52. The pressure block 54 is fixed to the middle of the straight rod 51 and is used to abut against the end of the clamping plate 45 away from the T-shaped plate 47. The pressure block 54 is arranged in an inverted U-shape.

[0036] When the locking sleeve 42 rotates in the forward direction, the locking sleeve 42 moves towards the blade, the end of the straight rod 51 slides against the inner wall of the annular groove 52, and the lower edge of the straight rod 51 abuts against the inner wall of the annular groove 52, causing the straight rod 51 to move upward along the straight groove 53, the pressure block 54 separates from the lower end of the clamping plate 45, and the upper end of the clamping plate 45 moves away from the T-shaped plate 47 by the elastic force of the first elastic member 43, so that the cutter 22 can move radially along the support rod 3 and slide out between the two clamping plates 45.

[0037] When the locking sleeve 42 rotates in the opposite direction, the locking sleeve 42 moves away from the blade. Similarly, the straight rod 51 moves down along the straight groove 53, and the pressure block 54 moves down with the straight rod 51 and abuts against the lower end of the clamping plate 45. The clamping plate 45 flips along the hinge and abuts against the upper surface of the T-shaped plate 47, thereby positioning the cutter 22.

[0038] The molten plastic is injected into the mold cavity through the gate 13, runner 14, and connecting channel 21. After the pressure holding is completed, the power mechanism 31 is activated, causing the cutter 22 to cut off the protrusion 1, eliminating the need for workers to cut it with scissors later.

[0039] The upper mold 11 has a blade storage groove 6 along its length for placing a new blade 22. The new blade 22 is connected to the inner wall of the blade storage groove 6 via a limiting structure. The limiting structure includes a limiting groove 71 and a limiting strip 72. The limiting groove 71 is formed on the side wall of the blade 22 and is arranged along the length of the blade 22. The limiting strip 72 is fixed to the inner wall of the blade storage groove 6, and the two limiting strips 72 are arranged opposite each other. The limiting strip 72 is made of fluororubber. The length direction of the limiting strip 72 is parallel to the length direction of the blade storage groove 6, and the limiting strip 72 is slidably connected to the limiting groove 71.

[0040] The new cutter 22 is placed in the blade storage slot 6 and the limiting strip 72 is slidably connected to the limiting slot 71. There is friction between the limiting strip 72 and the limiting slot 71.

[0041] A connecting groove 81 communicating with the tool storage groove 6 is provided on the side of the upper mold 11 facing the lower mold 12. The connecting groove 81 is located in the middle of the tool storage groove 6. A guide slope 73 is provided on the limiting strip 72, corresponding to the connecting groove 81. This facilitates the movement of the damaged cutter 22 along the guide slope 73 and allows the limiting groove 71 to be embedded in the limiting strip 72. The cutter 22 passes through the connecting groove 81 and is placed in the tool storage groove 6. A sealing plate 82 is hinged to the end of the connecting groove 81 away from the tool storage groove 6. The sealing plate 82 is connected to the inner wall of the connecting groove 81 by a spring piece 83. During the injection molding process, the sealing plate 82 prevents a large amount of molten plastic from entering the connecting groove 81.

[0042] A sliding hole 91 communicating with the connecting groove 81 is provided on the side wall of the upper mold 11. The length direction of the sliding hole 91 is parallel to the length direction of the knife storage groove 6. The sliding hole 91 is located below the knife storage groove 6. A drive rod 92 is slidably connected in the sliding hole 91. When it is necessary to replace the damaged cutter 22, the damaged cutter 22 is moved upward and the sealing plate 82 is pushed open, so that the damaged cutter 22 can pass through the connecting groove 81 and be placed in the knife storage groove 6. The drive rod 92 moves along its own length direction and drives the locking sleeve 42 to rotate through the drive assembly 93.

[0043] The drive assembly 93 includes a rack 931 and a gear ring 932. The gear ring 932 is fixed to the outer wall of the locking sleeve 42 and is coaxially arranged with the locking sleeve 42. The rack 931 is fixed to the outer wall of the drive rod 92 and is arranged along the length direction of the drive rod 92. The rack 931 is used to mesh with the gear ring 932.

[0044] Pushing the drive rod 92 causes the rack 931 to abut against and mesh with the gear ring 932, causing the gear ring 932 to drive the locking sleeve 42 to rotate in the forward direction, separating the clamping plate 45 from the T-shaped plate 47. Similarly, pulling the drive rod 92 causes the rack 931 and gear ring 932 to mesh again, causing the gear ring 932 to drive the locking sleeve 42 to rotate in the reverse direction, thus pressing the clamping plate 45 against the T-shaped plate 47.

[0045] A linkage groove 100 is provided in the upper mold 11. The two ends of the linkage groove 100 are connected to the sliding hole 91 and the tool storage groove 6, respectively. A linkage rod 101 is slidably connected in the linkage groove 100. The lower end of the linkage rod 101 is fixedly connected to the drive rod 92, and the upper end of the linkage rod 101 abuts against the T-shaped plate 47 through the push structure 102.

[0046] The pushing structure 102 includes a push plate 103, a stop block 104, and a second elastic element 105. The lower end of the push plate 103 is hinged to the upper end of the linkage rod 101. The two ends of the second elastic element 105 are fixedly connected to the push plate 103 and the drive rod 92, respectively. The second elastic element 105 is a spring. The stop block 104 is fixed to the upper end of the linkage rod 101 and is used to abut against the push plate 103, which is used to abut against the T-shaped plate 47.

[0047] The end of the drive rod 92 is fixedly connected to a limiting plate 200, which is used to abut against the side wall of the upper mold 11.

[0048] Following the above, after the damaged cutter 22 is located in the knife storage slot 6, the limiting plate 200 moves towards the side wall of the upper mold 11. During this process, the drive rod 92 moves synchronously with the limiting plate 200, and the clamping plate 45 separates from the T-shaped plate 47 on the damaged cutter 22. As the limiting plate 200 continues to move, the drive rod 92 drives the push plate 103 to move via the linkage rod 101. The push plate 103 abuts against the stop block 104 and drives the T-shaped plate 47 on the new cutter 22 to move, so that the new cutter 22 abuts against the damaged cutter 22 and aligns the new cutter 22 with the top post 46. At this time, the limiting plate 200 abuts against the side wall of the upper mold 11. Then, a pulling force is applied to the limiting plate 200, and the drive rod 92 moves synchronously with the limiting plate 200, causing the clamping plate 45 to press against the T-shaped plate 47 on the new cutter 22. At the same time, the push plate 103 resets.

[0049] Multiple new cutting blades 22 can be placed in the blade storage slot 6.

[0050] This invention can achieve automatic cutting of the protrusion 1, and can replace the cutter 22 without disassembling the lower mold 12. The operation is simple and greatly improves production efficiency and safety.

[0051] Of course, the above are just typical examples of the present invention. In addition, the present invention may have many other specific embodiments. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

Claims

1. A plastic cover plate in-mold injection mold structure, comprising an upper mold (11) and a lower mold (12), wherein the upper mold (11) has an upper mold cavity on the side facing the lower mold (12), and the lower mold (12) has a lower mold cavity on the side facing the upper mold (11), wherein a cavity is formed between the upper mold cavity and the lower mold cavity when the upper mold (11) and the lower mold (12) abut against each other, wherein the upper mold (11) has a gate (13) communicating with the cavity, and the lower mold (12) has a runner (14), wherein one end of the runner (14) is communicating with the gate (13) and the other end is communicating with the cavity, characterized in that: The lower mold (12) has an installation groove, in which an insert (2) located between the flow channel (14) and the cavity is fixedly connected. The insert (2) has a connecting groove (21) that communicates with the flow channel (14). A cutter (22) is slidably connected to the insert (2). The cutter (22) is connected to a support rod (3) through a connecting structure (4). The lower mold (12) is provided with a power mechanism (31) for driving the support rod (3) to move closer to the upper mold (11). The connecting structure (4) includes an installation hole (41), a locking sleeve (42), a first elastic element (43), a clamping plate (45), a top post (46), and a T-shaped plate (47). One end of the T-shaped plate (47) is fixed to the cutter (2). 2) The mounting hole (41) is opened at the upper end of the support rod (3). The middle part of the clamping plate (45) is hinged in the mounting hole (41) and the two clamping plates (45) are arranged opposite to each other. The top column (46) is fixed at the end of the mounting hole (41) and located between the two clamping plates (45). The two ends of the first elastic member (43) are fixedly connected to the two clamping plates (45) respectively. The top column (46) and the clamping plate (45) form a clamping area for clamping the T-shaped plate (47). The locking sleeve (42) is threaded to the outer wall of the support rod (3). The locking sleeve (42) moves away from the cutter (22) and the clamping plate (45) is pressed against the T-shaped plate (47) by the linkage assembly (5).

2. The plastic cover plate in-mold injection mold structure according to claim 1, characterized in that: The linkage component (5) includes a straight rod (51), an annular groove (52), a straight groove (53), and a pressure block (54). The straight groove (53) is opened on the support rod (3) and communicates with the mounting hole (41). The annular groove (52) is opened on the inner wall of the lock sleeve (42) and is coaxial with the lock sleeve (42). The straight rod (51) passes through the straight groove (53) and both ends are located in the annular groove (52). The pressure block (54) is fixed in the middle of the straight rod (51) and is used to abut against the end of the clamping plate (45) away from the T-shaped plate (47).

3. The plastic cover plate in-mold injection mold structure according to claim 1 or 2, characterized in that: The upper mold (11) has a knife storage groove (6) for placing the cutter (22) along its length. The cutter (22) is connected to the inner wall of the knife storage groove (6) through a limiting structure. The upper mold (11) has a connecting groove (81) communicating with the knife storage groove (6) on the side facing the lower mold (12). The connecting groove (81) is located in the middle of the knife storage groove (6). The cutter (22) passes through the connecting groove (81) and is placed in the knife storage groove (6). A sealing plate (82) is hinged to the end of the connecting groove (81) away from the knife storage groove (6). The sealing plate (82) is connected to the inner wall of the connecting groove (81) through a spring piece (83).

4. The plastic cover plate in-mold injection mold structure according to claim 3, characterized in that: The limiting structure includes a limiting groove (71) and a limiting strip (72). The limiting groove (71) is opened on the side wall of the cutter (22) and is arranged along the length direction of the cutter (22). The limiting strip (72) is fixed on the inner wall of the knife storage groove (6). The length direction of the limiting strip (72) is parallel to the length direction of the knife storage groove (6). The limiting strip (72) is slidably connected in the limiting groove (71). The limiting strip (72) is made of fluororubber. The two limiting strips (72) are arranged opposite to each other.

5. The plastic cover plate in-mold injection mold structure according to claim 3, characterized in that: The upper mold (11) has a sliding hole (91) on its side wall. A drive rod (92) is slidably connected in the sliding hole (91). The drive rod (92) moves along its own length and drives the locking sleeve (42) to rotate through the drive assembly (93).

6. The plastic cover plate in-mold injection mold structure according to claim 5, characterized in that: The drive assembly (93) includes a rack (931) and a toothed ring (932). The toothed ring (932) is fixed to the outer wall of the lock sleeve (42) and is coaxially arranged with the lock sleeve (42). The rack (931) is fixed to the outer wall of the drive rod (92) and is arranged along the length direction of the drive rod (92). The rack (931) is used to mesh with the toothed ring (932).

7. The plastic cover plate in-mold injection mold structure according to claim 6, characterized in that: The upper mold (11) is provided with a linkage groove (100). The two ends of the linkage groove (100) are connected to the sliding hole (91) and the knife storage groove (6) respectively. A linkage rod (101) is slidably connected in the linkage groove (100). The lower end of the linkage rod (101) is connected to the drive rod (92). The upper end of the linkage rod (101) abuts against the T-shaped plate (47) through the push structure (102).

8. The plastic cover plate in-mold injection mold structure according to claim 7, characterized in that: The pushing structure (102) includes a push plate (103), a stop block (104), and a second elastic member (105). The push plate (103) is hinged to the upper end of the linkage rod (101). The two ends of the second elastic member (105) are respectively connected to the push plate (103) and the drive rod (92). The stop block (104) is fixed to the upper end of the linkage rod (101) and is used to abut against the push plate (103). The push plate (103) is used to abut against the T-shaped plate (47).

9. The plastic cover plate in-mold injection mold structure according to claim 8, characterized in that: The end of the drive rod (92) is fixedly connected to a limiting plate (200), which is used to abut against the side wall of the upper mold (11).

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