Injection molding product punching device

Abstract

The present invention discloses a punching device for injection molded products, comprising a positioning mechanism, a punching mechanism, a driving mechanism, a bottom plate and a top plate, wherein the positioning mechanism is mounted on a side of the bottom plate facing the punching mechanism and is used to fix the injection molded part, the punching mechanism is mounted on a side of the top plate facing the positioning mechanism and is used to cut the injection molded part on the positioning mechanism, the top plate is slidably mounted on the bottom plate, and the driving mechanism is used to drive the top plate to move up and down with the punching mechanism; the positioning mechanism comprises a mounting plate and a positioning component, a positioning push plate and a driver arranged on the mounting plate, the mounting plate is fixed to the bottom plate, the positioning component is provided with a mounting position for mounting the injection molded part, the positioning push plate is slidably mounted on the mounting plate, and the driver is used to drive the positioning push plate to slide on the mounting plate to fix the injection molded part in the mounting position; the positioning component is provided with a first inclined surface at a punching opening close to the mounting position, and the inclination of the first inclined surface matches the inclination of the end of the material root, so as to position and punch the material root of the wedge-shaped design.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding processing, in particular to an injection molding product punching device. Background Art

[0002] Injection molding is a common product processing technology. Due to its high efficiency and precise molding capabilities, injection molding has important applications in the fields of automobiles, electronics, home appliances, etc. Products manufactured by injection molding usually have high precision and good physical properties, and can meet the needs of various complex shapes and functions.

[0003] like Figure 1 As shown, after the injection molding is completed, the injection molded part 200 includes a material root 210 and a plurality of products 220 connected to the material root 210. In order to obtain the final product 220, the material root 210 needs to be separated from the product 220. Currently, there are several common ways to separate the material root 210 from the product 220: using an injection mold, using an ordinary cutting mold, and ultrasonic nozzle cutting. However, it is difficult to perform in-mold root cutting in an injection mold; ordinary cutting molds waste tool consumables more seriously; once the nozzle size requirements of the product are relatively strict, ultrasonic nozzle cutting cannot be used.

[0004] For the injection molded part 200 whose product 220 is too small, containing glass fiber material, in order to facilitate injection molding, the end of the material root 210 close to the product 220 is usually wedge-shaped, that is, there is a certain slope at the end of the material root 210, so that there is a certain slope between the product 220 and the material root 210. Figure 1 The size of the product 220 is 3.5mmx0.95mmx0.1mm. The front end of the product 220 has a right angle of 0.2mm in length, and there is an angle of 8 degrees between the front end and the root 210, that is, the slope of the wedge-shaped design of the root 210 is 8 degrees, and the material of the product 220 contains 55% glass solder material. Since the dimensional accuracy requirements of the product 220 after punching are relatively high, ordinary punching devices cannot meet the requirements. Therefore, there is an urgent need for an injection molding product punching device that can cut the injection molding part 200 with a slope at the end of the product 220. Summary of the invention

[0005] In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide an injection molding product punching device to solve the problem that the existing punching devices in the prior art cannot cut the wedge-shaped material roots.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] The present invention provides an injection molding product punching device, comprising a positioning mechanism, a punching mechanism, a driving mechanism, a bottom plate and a top plate, wherein the positioning mechanism is installed on a side of the bottom plate facing the punching mechanism and is used to fix the injection molding part, the punching mechanism is installed on a side of the top plate facing the positioning mechanism and is used to cut the injection molding part on the positioning mechanism, the top plate is slidably installed on the bottom plate, and the driving mechanism is used to drive the top plate to move up and down with the punching mechanism;

[0008] The positioning mechanism includes a mounting plate, a positioning assembly, a positioning push plate and a driver arranged on the mounting plate. The mounting plate is fixed to the bottom plate. The positioning assembly is provided with a mounting position for mounting the injection molded part. The positioning push plate is slidably mounted on the mounting plate. The driver is used to drive the positioning push plate to slide on the mounting plate to fix the injection molded part in the mounting position.

[0009] The positioning component is provided with a first inclined surface at the punching cutout close to the installation position, and the inclination of the first inclined surface matches the inclination of the end of the material root.

[0010] Furthermore, the positioning assembly includes a fixed support block, a sliding support block and a first elastic member, the fixed support block is fixed to the mounting plate, the sliding support block is slidably mounted on the mounting plate, the first inclined surface is located on the sliding support block, the punching cut is located at the end of the sliding support block close to the positioning push plate, and the first elastic member is arranged between the fixed support block and the sliding support block and has an elastic force to drive the sliding support block to move toward the positioning push plate.

[0011] Furthermore, a second inclined surface is provided on the fixed support block, and the second inclined surface is located in a region of the installation position away from the first inclined surface, and the inclination of the second inclined surface matches the inclination of the end of the material root.

[0012] Furthermore, the positioning mechanism includes a flip cover pressing plate, which is rotatably connected to the mounting plate and cooperates with the second inclined surface to fix the injection molded part in the mounting position.

[0013] Furthermore, a slide rail is provided on the mounting plate, and a slider matching the slide rail is provided at the bottom of the positioning push plate, and the positioning push plate slides on the slide rail through the slider;

[0014] A limit block is arranged on the mounting plate, and a limit slot matching with the limit block is arranged on the positioning push plate. The limit block and the limit slot are used together to limit the sliding distance of the positioning push plate on the slide rail.

[0015] Furthermore, the positioning mechanism includes a material receiving box, and the mounting plate is provided with a receiving cavity communicated with the punching cut at the bottom of the punching cut. The material receiving box is installed in the receiving cavity and is used to collect the cut products.

[0016] Furthermore, the punching mechanism includes a cutter fixing plate, a cutter, a pre-pressing plate and a second elastic member, the cutter fixing plate is fixed to the top plate, the cutter is mounted on the cutter fixing plate and corresponds to the punching opening, the pre-pressing plate can move up and down relative to the cutter fixing plate, and the second elastic member has an elastic force driving the pre-pressing plate to move toward the positioning mechanism;

[0017] A pre-pressing knife and an avoidance hole are arranged on the pre-pressing plate, the end of the cutting knife extends out of the avoidance hole, the pre-pressing knife protrudes from the surface of the pre-pressing plate and is closer to the positioning mechanism than the cutting knife.

[0018] Furthermore, a positioning column is provided on the cutter fixing plate, and a positioning hole matching with the positioning column is provided on the mounting plate.

[0019] Furthermore, the bottom plate is provided with a guide column and a limit column on the side facing the top plate, the top plate is provided with a guide hole cooperating with the guide column, the top plate slides on the guide column through the guide hole, and the limit column is used to limit the minimum distance between the bottom plate and the top plate.

[0020] Further, the injection molded product punching device includes an upper mounting frame and a lower mounting frame, and the upper mounting frame is mounted above the lower mounting frame;

[0021] The upper mounting frame comprises a lower plate, an upper plate and a support frame located between the lower plate and the upper plate, the bottom plate is fixed to the side of the lower plate facing the upper plate, the driving mechanism is installed on the upper plate and the telescopic rod of the driving mechanism is connected to the top plate.

[0022] The beneficial effects of the present invention are as follows: by providing a first inclined surface at the punching opening near the installation position of the positioning component, and the inclination of the first inclined surface matches the inclination of the end of the material root, the wedge-shaped material root can be better installed in the installation position of the positioning component, and the injection molded part is fixed in the installation position by the positioning push plate to prevent the injection molded part from shaking during punching, so that the punching mechanism can cut the injection molded part in the installation position to ensure the dimensional accuracy of the product after punching. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the injection molded part.

[0024] Figure 2 It is a three-dimensional structural schematic diagram of the punching device for injection molded products in the present invention.

[0025] Figure 3 It is a three-dimensional structural schematic diagram of the upper mounting frame, positioning mechanism, punching mechanism, driving mechanism, bottom plate and top plate in the present invention.

[0026] Figure 4 It is a three-dimensional structural schematic diagram of the positioning mechanism, punching mechanism, bottom plate and top plate during punching in the present invention.

[0027] Figure 5 It is a three-dimensional structural schematic diagram of the positioning mechanism, punching mechanism, bottom plate and top plate in the present invention when taking and placing materials.

[0028] Figure 6 It is a three-dimensional structural schematic diagram of the positioning mechanism in the present invention.

[0029] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure at point A in the middle.

[0030] Figure 8 It is a schematic diagram of the three-dimensional structure of the positioning mechanism after the injection molded part is installed in the present invention.

[0031] Fig. 9 yes Figure 8 Schematic diagram of the enlarged structure at point B in the middle.

[0032] Fig.10 It is a schematic diagram of the split structure of the positioning mechanism in the present invention.

[0033] Fig.11 It is a schematic diagram of the structure of the punching mechanism and the top plate in the present invention when viewed from above.

[0034] Fig.12 It is a schematic diagram of the split structure of the punching mechanism and the top plate in the present invention when viewed from above.

[0035] In the figure: injection molding product punching device 100, positioning mechanism 10, mounting position 101, punching opening 102, receiving cavity 103, mounting plate 11, slide rail 111, limit block 112, positioning hole 113, positioning assembly 12, fixed support block 121, second inclined surface 1211, sliding support block 122, first inclined surface 1221, first elastic member 123, positioning push plate 13, slider 131, limit groove 132, driver 14, flip cover pressing plate 15, material receiving box 16 , punching mechanism 20, cutter fixing plate 21, positioning column 211, cutter 22, pre-pressing plate 23, pre-pressing knife 231, avoidance hole 232, sliding hole 233, second elastic member 24, driving mechanism 30, telescopic rod 31, bottom plate 40, guide column 41, limit column 42, top plate 50, guide hole 501, sliding column 51, upper mounting frame 60, lower plate 61, upper plate 62, support frame 63, lower mounting frame 70, injection molded part 200, material root 210, product 220. DETAILED DESCRIPTION

[0036] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the injection molding product punching device proposed by the present invention are described in detail as follows in combination with the accompanying drawings and preferred embodiments:

[0037] Figure 1It is a schematic diagram of the three-dimensional structure of the injection molded part. Figure 2 It is a three-dimensional structural schematic diagram of the punching device for injection molded products in the present invention. Figure 3 It is a three-dimensional structural schematic diagram of the upper mounting frame, positioning mechanism, punching mechanism, driving mechanism, bottom plate and top plate in the present invention. Figure 4 It is a three-dimensional structural schematic diagram of the positioning mechanism, punching mechanism, bottom plate and top plate during punching in the present invention. Figure 5 It is a three-dimensional structural schematic diagram of the positioning mechanism, punching mechanism, bottom plate and top plate in the present invention when taking and placing materials. Figure 6 It is a three-dimensional structural schematic diagram of the positioning mechanism in the present invention. Figure 7 yes Figure 6 Schematic diagram of the enlarged structure at point A in the middle. Figure 8 It is a schematic diagram of the three-dimensional structure of the positioning mechanism after the injection molded part is installed in the present invention. Fig. 9 yes Figure 8 Schematic diagram of the enlarged structure at point B in the middle. Fig.10 It is a schematic diagram of the split structure of the positioning mechanism in the present invention. Fig.11 It is a schematic diagram of the structure of the punching mechanism and the top plate in the present invention when viewed from above. Fig.12 It is a schematic diagram of the split structure of the punching mechanism and the top plate in the present invention when viewed from above.

[0038] like Figures 1 to 12 As shown, the present invention provides an injection molded product punching device 100, which includes a positioning mechanism 10, a punching mechanism 20, a driving mechanism 30, a bottom plate 40 and a top plate 50. The positioning mechanism 10 is installed on the side of the bottom plate 40 facing the punching mechanism 20 and is used to fix the injection molded part 200. The punching mechanism 20 is installed on the side of the top plate 50 facing the positioning mechanism 10 and is used to cut the injection molded part 200 on the positioning mechanism 10. The top plate 50 is slidably installed on the bottom plate 40. The driving mechanism 30 is used to drive the top plate 50 to move up and down with the punching mechanism 20 and is used to cut the injection molded part 200 on the positioning mechanism 10.

[0039] like Figures 4 to 9 As shown, the positioning mechanism 10 includes a mounting plate 11, a positioning assembly 12, a positioning push plate 13 and a driver 14 arranged on the mounting plate 11. The mounting plate 11 is fixed on the bottom plate 40, and the positioning assembly 12 is provided with a mounting position 101 for mounting the injection molded part 200. The positioning push plate 13 is slidably mounted on the mounting plate 11, and the driver 14 is used to drive the positioning push plate 13 to slide on the mounting plate 11 to fix the injection molded part 200 to the mounting position 101. The positioning assembly 12 is provided with a first inclined surface 1221 at the punching cutout 102 near the mounting position 101, and the inclination of the first inclined surface 1221 matches the inclination of the end of the material root 210, so that the wedge-shaped material root 210 can be better installed in the mounting position 101 of the positioning assembly 12.

[0040] The present application provides a first inclined surface 1221 at the punching opening 102 near the mounting position 101 of the positioning component 12, and the inclination of the first inclined surface 1221 matches the inclination of the end of the material root 210, so that the wedge-shaped material root 210 can be better installed in the mounting position 101 of the positioning component 12, and the injection molded part 200 is fixed in the mounting position 101 by the positioning push plate 13 to prevent the injection molded part 200 from shaking during punching, so that the punching mechanism 20 can cut the injection molded part 200 in the mounting position 101 to ensure the dimensional accuracy of the product 220 after punching.

[0041] like Figures 6 to 9 As shown, the positioning assembly 12 includes a fixed support block 121, a sliding support block 122 and a first elastic member 123. The fixed support block 121 is fixed on the mounting plate 11, the sliding support block 122 is slidably mounted on the mounting plate 11, the first inclined surface 1221 is located on the sliding support block 122, and the punching cutout 102 is located at the end of the sliding support block 122 close to the positioning push plate 13. The first elastic member 123 is arranged between the fixed support block 121 and the sliding support block 122 and has an elastic force that drives the sliding support block 122 to move toward the positioning push plate 13. The sliding direction of the positioning push plate 13 on the mounting plate 11 is the same as the sliding direction of the sliding support block 122 on the mounting plate 11, and both are along the front-to-back direction (reference Figure 2 The fixed support block 121 and the sliding support block 122 together form the mounting position 101 to support the injection molded part 200, that is, part of the root 210 of the injection molded part 200 is supported on the fixed support block 121, and the other part of the root 210 is supported on the sliding support block 122. By setting the sliding support block 122 and applying a certain elastic force to the sliding support block 122 using the first elastic member 123, the size of the mounting position 101 can be changed, so that the injection molded part 200 can be installed on the mounting position 101, and the root 210 can be removed from the mounting position 101 after punching. Moreover, the positioning component 12 can have a pre-fixing effect on the injection molded part 200, and then cooperate with the driver 14 to drive the positioning push plate 13 to slide on the mounting plate 11, so that the injection molded part 200 is stably fixed in the mounting position 101, which can improve the fixing accuracy and stability of the injection molded part 200 fixed to the mounting position 101. Optionally, both the fixed support block 121 and the sliding support block 122 are provided with card slots, and the branches of the material root 210 are carded in the card slots, so as to better card the material root 210 in the installation position 101.

[0042] Furthermore, the fixed support block 121 is provided with a second inclined surface 1211, which is located in an area of ​​the installation position 101 away from the first inclined surface 1221, and the inclination of the second inclined surface 1211 matches the inclination of the end of the material root 210. In order to improve the injection molding efficiency, the opposite sides of the material root 210 are provided with products 220 (refer to Figure 1 ), the first inclined surface 1221 is used to support the branch of the material root 210 on one side, and the second inclined surface 1211 is used to support the branch of the material root 210 on the other side.

[0043] Furthermore, the positioning mechanism 10 includes a flip cover pressing plate 15, which is rotatably connected to the mounting plate 11 and cooperates with the second inclined surface 1211 to fix the injection molded part 200 in the mounting position 101. By setting the flip cover pressing plate 15 to fix the branch of the material root 210 away from the punching opening 102, the injection molded part 200 can be further firmly fixed in the mounting position 101 to prevent the injection molded part 200 from shaking during punching. The flip cover pressing plate 15 rotates with the mounting plate 11 through the rotating shaft, and one flip cover pressing plate 15 cooperates with the second inclined surfaces 1211 on multiple fixed support blocks 121, so that multiple branches on one side of the material root 210 can be fixed.

[0044] In this embodiment, Fig.10 As shown, the mounting plate 11 is provided with a slide rail 111, and the bottom of the positioning push plate 13 is provided with a slider 131 that matches the slide rail 111, and the positioning push plate 13 slides on the slide rail 111 through the slider 131. The slide rail 111 is arranged along the front-to-back direction (reference Figure 2 The slider 131 is provided with a slide groove matched with the slide rail 111, so that the slider 131 can slide on the slide rail 111 in the front-rear direction. Optionally, the positioning push plate 13 can also be provided with an air hole (not shown) on the side facing the punching opening 102, and the air hole can be used for both blowing and absorbing, so as to absorb the product 220 and blow the punched product 220 into the receiving box 16.

[0045] Further, such as Fig. 9 As shown, the mounting plate 11 is provided with a limit block 112, and the positioning push plate 13 is provided with a limit groove 132 matched with the limit block 112, and the limit block 112 and the limit groove 132 are used together to limit the sliding distance of the positioning push plate 13 on the slide rail 111. The limit grooves 132 are provided on opposite sides of the positioning push plate 13, and the mounting plate 11 is provided with a limit block 112 on opposite sides of each positioning push plate 13, and the limit block 112 and the limit groove 132 are used together to limit the sliding distance of the positioning push plate 13 on the slide rail 111.

[0046] Further, such as Fig.10 As shown, the positioning mechanism 10 includes a material receiving box 16 , and the mounting plate 11 is provided with a receiving cavity 103 communicating with the punching opening 102 at the bottom of the punching opening 102 . The material receiving box 16 is installed in the receiving cavity 103 and is used to collect the cut products 220 .

[0047] In this embodiment, Fig.11 and Fig.12As shown, the punching mechanism 20 includes a cutter fixing plate 21, a cutter 22, a pre-pressing plate 23 and a second elastic member 24. The cutter fixing plate 21 is fixed on the top plate 50. The cutter 22 is mounted on the cutter fixing plate 21 and corresponds to the punching opening 102. The pre-pressing plate 23 can move up and down relative to the cutter fixing plate 21. The second elastic member 24 has an elastic force that drives the pre-pressing plate 23 to move toward the positioning mechanism 10. Optionally, a sliding column 51 is provided on the top plate 50, and a sliding hole 233 that cooperates with the sliding column 51 is provided on the pre-pressing plate 23. The second elastic member 24 is sleeved on the sliding column 51 and is located between the top plate 50 and the pre-pressing plate 23. The pre-pressing plate 23 is sleeved on the sliding column 51 through the sliding hole 233 and can slide up and down on the sliding column 51. Among them, the first elastic member 123 and the second elastic member 24 are both compression springs, that is, the springs are both in a compressed state in the initial state. Of course, in other embodiments, the sliding column 51 may also be disposed on the cutter fixing plate 21 .

[0048] Furthermore, the pre-pressing plate 23 is provided with a pre-pressing knife 231 and an avoidance hole 232, the end of the cutter 22 extends out of the avoidance hole 232, and the pre-pressing knife 231 protrudes from the surface of the pre-pressing plate 23 and is closer to the positioning mechanism 10 than the cutter 22. When cutting the injection molded part 200, the pre-pressing knife 231 on the pre-pressing plate 23 first presses the product 220 on the injection molded part 200, thereby further fixing the product 220; then the driving mechanism 30 continues to drive the top plate 50 to descend with the punching mechanism 20, so that the cutter 22 cuts the connection between the material root 210 and the product 220 at the punching opening 102, so as to cut off the product 220 on the material root 210.

[0049] In this embodiment, Figures 4 to 12 As shown, the cutter fixing plate 21 is provided with a positioning column 211, and the mounting plate 11 is provided with a positioning hole 113 that matches the positioning column 211. The cutter fixing plate 21 and the mounting plate 11 are cut and positioned through the positioning column 211 and the positioning hole 113, so that the cutter 22 can be accurately aligned with the connection between the material root 210 and the product 220 for cutting, so as to further improve the accuracy of punching.

[0050] In this embodiment, the bottom plate 40 is provided with a guide column 41 and a limit column 42 on the side facing the top plate 50 ( Figure 4 and Figure 5 ), the top plate 50 is provided with a guide hole 501 ( Fig.11 and Fig.12 ), the top plate 50 slides up and down on the guide column 41 through the guide hole 501, and the limit column 42 is used to limit the minimum distance between the bottom plate 40 and the top plate 50, so as to prevent the punching mechanism 20 from descending too far and causing the cutter 22 to damage the shape of the positioning mechanism 10.

[0051] In this embodiment, Figure 2 and Figure 3 As shown, the injection molded product punching device 100 includes an upper mounting frame 60 and a lower mounting frame 70 . The upper mounting frame 60 is mounted above the lower mounting frame 70 , and the lower mounting frame 70 supports and increases the height of the upper mounting frame 60 .

[0052] The upper mounting frame 60 includes a lower plate 61, an upper plate 62, and a support frame 63 located between the lower plate 61 and the upper plate 62. The bottom plate 40 is fixed to the side of the lower plate 61 facing the upper plate 62. The driving mechanism 30 is installed on the upper plate 62, and the telescopic rod 31 of the driving mechanism 30 is connected to the top plate 50. The driving mechanism 30 and the driver 14 both use telescopic cylinders. The driving mechanism 30 is placed vertically to be telescopic in the up-down direction; the driver 14 is placed horizontally to be telescopic in the front-back direction.

[0053] The working process of the injection molding product punching device 100 in this application is as follows:

[0054] refer to Figure 5 The driving mechanism 30 contracts and drives the top plate 50 to rise with the punching mechanism 20; the driver 14 contracts and drives the positioning push plate 13 away from the punching opening 102; the flip cover pressing plate 15 is manually opened, and the injection molded part 200 is placed in the mounting position 101 on the positioning component 12.

[0055] The driver 14 extends and drives the positioning push plate 13 to slide toward the punching opening 102, so that the positioning push plate 13 fixes the product 220, and also fixes the injection molded part 200 in the installation position 101; the flip cover pressing plate 15 is manually closed and fixes the multiple branches of the material root 210 away from the punching opening 102; the air holes on the positioning push plate 13 are converted into vacuum suction and adsorb the product 220.

[0056] After the placement is completed, the button is started, the driving mechanism 30 extends and drives the top plate 50 to descend with the punching mechanism 20, and the pre-pressing knife 231 on the pre-pressing plate 23 first presses the product 220 on the injection molded part 200, and pre-presses the product 220 under the action of the second elastic member 24; then the driving mechanism 30 extends and drives the top plate 50 to continue to descend with the punching mechanism 20, and the cutter 22 on the cutter fixing plate 21 extends out of the avoidance hole 232 and cuts the connection between the material root 210 and the product 220 until the top plate 50 descends to the top of the limit column 42, refer to Figure 4 .

[0057] After the cutting is completed, the driving mechanism 30 contracts and drives the top plate 50 to rise and reset with the punching mechanism 20, the driver 14 contracts and drives the positioning push plate 13 away from the punching opening 102, and the positioning push plate 13 brings the cut product 220 to the blanking area during the return process, and the air holes on the positioning push plate 13 are switched to the blowing state and blow the product 220 into the receiving box 16. After the punching mechanism 20 rises to the top, the flip cover pressing plate 15 is manually opened to take out the material root 210, and a cycle is completed.

[0058] In this document, the directional words such as up, down, left, right, front, and back are defined by the positions of the structures in the drawings and the positions of the structures relative to each other, just for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application. It should also be understood that the terms "first" and "second" used in this document are only used to distinguish names and are not used to limit quantity and order.

[0059] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to the technical contents disclosed above without departing from the scope of the technical solution of the present invention, which are equivalent embodiments of equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A punching device for injection molded products, characterized in that: The invention comprises a positioning mechanism (10), a punching mechanism (20), a driving mechanism (30), a bottom plate (40) and a top plate (50); the positioning mechanism (10) is mounted on a side of the bottom plate (40) facing the punching mechanism (20) and is used to fix the injection molded part (200); the punching mechanism (20) is mounted on a side of the top plate (50) facing the positioning mechanism (10) and is used to cut the injection molded part (200) on the positioning mechanism (10); the top plate (50) is slidably mounted on the bottom plate (40); and the driving mechanism (30) is used to drive the top plate (50) to move up and down with the punching mechanism (20) and to cut the injection molded part (200) on the positioning mechanism (10); The positioning mechanism (10) comprises a mounting plate (11), a positioning assembly (12), a positioning push plate (13) and a driver (14) arranged on the mounting plate (11); the mounting plate (11) is fixed on the base plate (40); the positioning assembly (12) is provided with a mounting position (101) for mounting the injection molded part (200); the positioning push plate (13) is slidably mounted on the mounting plate (11); and the driver (14) is used to drive the positioning push plate (13) to slide on the mounting plate (11) so as to fix the injection molded part (200) in the mounting position (101); The positioning component (12) is provided with a first inclined surface (1221) at the punching opening (102) close to the installation position (101), and the inclination of the first inclined surface (1221) matches the inclination of the end of the material root (210); The positioning assembly (12) comprises a fixed support block (121), a sliding support block (122) and a first elastic member (123); the fixed support block (121) is fixed on the mounting plate (11); the sliding support block (122) is slidably mounted on the mounting plate (11); the first inclined surface (1221) is located on the sliding support block (122); the punching cutout (102) is located at an end of the sliding support block (122) close to the positioning push plate (13); the first elastic member (123) is arranged between the fixed support block (121) and the sliding support block (122) and has an elastic force for driving the sliding support block (122) to move toward the positioning push plate (13).

2. The punching device for injection molded products according to claim 1, characterized in that: The fixed support block (121) is provided with a second inclined surface (1211), the second inclined surface (1211) is located in an area of ​​the installation position (101) away from the first inclined surface (1221), and the inclination of the second inclined surface (1211) matches the inclination of the end of the material root (210).

3. The punching device for injection molded products according to claim 2, characterized in that: The positioning mechanism (10) comprises a flip cover pressing plate (15), wherein the flip cover pressing plate (15) is rotatably connected to the mounting plate (11) and cooperates with the second inclined surface (1211) to fix the injection molded part (200) in the mounting position (101).

4. The injection molding product punching device according to claim 1, characterized in that: The mounting plate (11) is provided with a slide rail (111), the bottom of the positioning push plate (13) is provided with a slider (131) matched with the slide rail (111), and the positioning push plate (13) slides on the slide rail (111) through the slider (131); The mounting plate (11) is provided with a limit block (112), and the positioning push plate (13) is provided with a limit groove (132) matched with the limit block (112), and the limit block (112) and the limit groove (132) are used together to limit the sliding distance of the positioning push plate (13) on the slide rail (111).

5. The injection molding product punching device according to claim 1, characterized in that: The positioning mechanism (10) comprises a material receiving box (16); the mounting plate (11) is provided with a receiving cavity (103) at the bottom of the punching opening (102) and connected to the punching opening (102); the material receiving box (16) is installed in the receiving cavity (103) and is used to collect the cut products (220).

6. The injection molding product punching device according to claim 1, characterized in that: The punching mechanism (20) comprises a cutter fixing plate (21), a cutter (22), a pre-pressing plate (23) and a second elastic member (24); the cutter fixing plate (21) is fixed on the top plate (50); the cutter (22) is mounted on the cutter fixing plate (21) and corresponds to the punching opening (102); the pre-pressing plate (23) can move up and down relative to the cutter fixing plate (21); and the second elastic member (24) has an elastic force for driving the pre-pressing plate (23) to move toward the positioning mechanism (10); The pre-pressing plate (23) is provided with a pre-pressing knife (231) and an avoidance hole (232), the end of the cutting knife (22) protrudes from the avoidance hole (232), and the pre-pressing knife (231) protrudes from the surface of the pre-pressing plate (23) and is closer to the positioning mechanism (10) than the cutting knife (22).

7. The injection molding product punching device according to claim 6, characterized in that: The cutter fixing plate (21) is provided with a positioning column (211), and the mounting plate (11) is provided with a positioning hole (113) matched with the positioning column (211).

8. The injection molding product punching device according to claim 1, characterized in that: The bottom plate (40) is provided with a guide column (41) and a limit column (42) on a side facing the top plate (50); the top plate (50) is provided with a guide hole (501) matched with the guide column (41); the top plate (50) slides on the guide column (41) through the guide hole (501); and the limit column (42) is used to limit the minimum distance between the bottom plate (40) and the top plate (50).

9. The punching device for injection molded products according to any one of claims 1 to 8, characterized in that: The injection molded product punching device (100) comprises an upper mounting frame (60) and a lower mounting frame (70), wherein the upper mounting frame (60) is mounted above the lower mounting frame (70); The upper mounting frame (60) comprises a lower plate (61), an upper plate (62) and a support frame (63) located between the lower plate (61) and the upper plate (62); the bottom plate (40) is fixed to a side of the lower plate (61) facing the upper plate (62); the driving mechanism (30) is mounted on the upper plate (62) and the telescopic rod (31) of the driving mechanism (30) is connected to the top plate (50).

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