Automatic punching machine for water gap of plastic part

Abstract

The utility model relates to an automatic die-cutting machine for a water gap of a plastic part, which is provided with an operating platform, a lower die set capable of moving back and forth is arranged on the top surface of the operating platform, a support plate is erected on the top surface of the operating platform close to the rear end, a die-cutting machine capable of moving up and down is arranged on the support plate, and an upper die set is arranged at the bottom of the die-cutting machine. The upper die set can correspond to the lower die set moving to the rear end of the operation table in an up-down mode and can be matched with the lower die set in an up-down inserted mode, and water gap cutting work can be conducted on a plastic part placed on the lower die set through the upper die set. A vertically-communicated waste opening is formed in the position, corresponding to the bottom of the upper die set, of the top face of the operation table, and a waste box vertically corresponding to the waste opening is arranged in the operation table. According to the automatic punching machine for the water gap of the plastic part, the water gap can be completely cut off from the root through the cutter from top to bottom, a notch is uniform and flat, the appearance attractiveness of the plastic part after the water gap is removed is guaranteed, secondary correction is avoided, the cutting efficiency of the water gap can be effectively improved, and the use cost is low.

Description

Technical Field

[0001] The utility model relates to a nozzle cutting of an injection molded part, in particular to an automatic nozzle punching and cutting machine for a plastic part. Background Art

[0002] During the injection molding process, since the internal flow channel in the injection mold is interconnected with the injection cavity, after demolding, sprues similar to the shape of the internal flow channel will remain on the plastic part. These sprues remaining on the plastic part are of no use and therefore need to be removed.

[0003] At present, the nozzles remaining on the plastic parts are mainly cut off manually, using a utility knife or scissors to cut off the nozzles remaining on the plastic parts. However, when manually cutting off the nozzles, the root cutting is often not possible, that is, the nozzle cutting process is easy to be off-cut, and the root connecting the nozzle and the plastic part is not cut off, and the cutting is often crooked, which affects the appearance of the plastic parts, requires secondary processing, consumes time and manpower, and the processing efficiency is relatively slow, and the processing cost is also relatively high. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide an automatic plastic part water outlet punching machine which can ensure a regular incision and high plastic part water outlet cutting efficiency.

[0005] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0006] A plastic part sprue automatic punching machine has an operating table with a box-type structure, the top surface of the operating table is provided with a lower die group that can move forward and backward, a support plate is set up at the position of the top surface of the operating table near the rear end, a die-cutting machine that can move up and down is provided on the support plate, an upper die group fixedly connected to the die-cutting machine is provided at the bottom of the die-cutting machine, the upper die group can move up and down through the die-cutting machine, and the upper die group can correspond to the lower die group moved to the rear end of the operating table and be plugged in and matched up and down, and the sprue of the plastic part placed on the lower die group can be cut by the upper die group; a waste port that is connected up and down is provided at a position on the top surface of the operating table corresponding to the bottom of the upper die group, and a waste box that opens upward and corresponds to the waste port up and down is provided inside the operating table.

[0007] Furthermore, the lower die set is slidably connected to the operating table by a linear guide rail, which has two groups and is arranged in parallel on the left and right; the die-cutting machine has two groups, which correspond to the two groups of lower die sets respectively, and a group of upper die sets is arranged at the bottom of each group of die-cutting machines; a linear module is arranged in the operating table, and the linear module has two groups, which correspond to the two groups of lower die sets respectively; a connecting block is fixedly connected to the slide table of the linear module, and the upper end passes through the top of the operating table and is fixedly connected to the lower die set, and the operating table can drive the lower die set to move forward and backward along the linear guide rail through the connecting block.

[0008] Furthermore, the die-cutting machine includes a bracket, which is fixed on the top of the support plate, and a cutting cylinder fixedly connected to the bracket is arranged on the top surface of the bracket, and the piston rod of the cutting cylinder is vertically downward and passes through the top of the bracket and is fixedly connected to a connecting block arranged in the bracket; two symmetrical upper guide columns are arranged at the bottom of the connecting block near the left and right sides, and the upper guide columns pass through the upper guide sleeve preset on the support plate and are fixedly connected to the upper die base arranged under the support plate, and the upper die group is fixedly connected to the bottom surface of the upper die base.

[0009] Furthermore, the upper die seat is of a rectangular structure, and a vertically upward lower guide column is respectively arranged at the four corners of the top, and the lower guide column is upwardly passed through a preset lower guide sleeve on the support plate.

[0010] Furthermore, the lower mold assembly includes a lower template, a transition hole connected up and down is set in the center of the lower template, a lower pad fixedly connected thereto is set on the top surface, a waste hole connected up and down is set on the lower pad, the waste hole corresponds to the transition hole up and down, and a jig for placing plastic parts is set at the top surface of the lower pad near the waste hole; a support plate is set below the bottom of the lower template, the contour structure of the support plate is consistent with the contour of the transition hole, the support plate is suspended below the bottom surface of the lower pad by a suspension rod, the suspension rod is a threaded rod, which is threadedly connected to the lower pad, and a blanking port corresponding to the transition hole and the waste hole up and down is set on the support plate, the blanking port can correspond to the waste port up and down, and a top block is set on the top of the support plate, the top of which corresponds to the jig up and down and is embedded.

[0011] Furthermore, a material trough for placing plastic parts is provided on the top of the jig, and a lower connecting hole connected up and down is provided at the bottom of the material trough, and the upper end of the top block is embedded in the lower connecting hole with a clearance fit; a guide cutting groove connected up and down with the waste drop hole is provided on one side of the jig corresponding to the waste drop hole.

[0012] Furthermore, the upper mold assembly includes an upper mold plate, the bottom of which is suspended with a limit block by a spring pin, the center of the limit block is provided with a socket connected up and down, a pressure block is embedded in the socket and slides up and down with the pressure block, the top of the pressure block is fixedly connected to the bottom of the upper mold plate, a cutting knife with a cutting edge facing downward is provided on one side of the limit block, and the top of the cutting knife is fixedly connected to the bottom of the upper mold plate.

[0013] Furthermore, the bottom of the upper template is provided with vertically arranged positioning columns near the corners, and the lower mold assembly is provided with positioning sleeves corresponding to the number and positions of the positioning columns.

[0014] Furthermore, a material support rack is arranged on the front of the operating table, a material box is placed in the material support rack, and the material box corresponds to the lower mold assembly front to back.

[0015] Compared with the prior art, the advantages of the utility model are: this automatic plastic part sprue punching machine can place the plastic part with the sprue to be cut off in a jig that matches its contour, and the side of the plastic part with the sprue is close to the side of the jig. The sprue can be completely cut off from the root from top to bottom by the cutter, and the incision is symmetrical and smooth, ensuring the appearance of the plastic part after the sprue is removed, avoiding secondary correction, and the automated cutting method is more stable, and can effectively improve the sprue cutting efficiency, the use cost is relatively low, it is easy to promote in the industry, and it has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a three-dimensional structural diagram of an automatic plastic part water inlet punching and cutting machine of the utility model;

[0018] Figure 2 This is a schematic diagram of the top view of the structure of an automatic plastic part water inlet punching machine of the utility model;

[0019] Figure 3 yes Figure 2 Structural cross-section view of AA in the middle;

[0020] Figure 4 It is a schematic diagram of the top axis side when the upper die set and the lower die are combined in the utility model;

[0021] Figure 5 This is a schematic diagram of the bottom axis side when the upper die set and the lower die are combined in the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the upper die set and the lower die set when the upper die set is combined into a die in the utility model;

[0023] Figure 7 yes Figure 6 The structural cross-section view of the middle BB;

[0024] Figure 8 yes Figure 6 Structural cross-section view of CC;

[0025] Fig. 9 This is a schematic diagram of the top axial side of the upper die set in the utility model;

[0026] Fig.10 This is a schematic diagram of the bottom axial side of the upper mold assembly in the utility model;

[0027] Fig.11 This is a schematic diagram of the structure of the middle and lower modules of the utility model;

[0028] Fig.12 It is a schematic diagram of the structure of the fixture in the utility model.

[0029] In the figure: 1. operating table; 11. waste opening; 12. support plate; 13. linear guide rail; 14. material box; 15. bracket; 16. linear module; 161. connecting block; 2. die cutting machine; 21. bracket; 22. cutting cylinder; 23. connecting block; 231. upper guide column; 24. upper die seat; 241. lower guide column; 3. lower die set; 31. lower die plate; 311. transition hole; 32 , lower pad; 321, waste drop hole; 33, fixture; 331, lower connecting hole; 332, material trough; 333, guide cutting groove; 34, positioning sleeve; 35, support plate; 351, material drop port; 352, suspension rod; 36, top block; 4, upper mold assembly; 41, upper mold plate; 411, positioning column; 42, limit block; 421, socket; 43, pressure block; 44, spring pin; 45, cutter. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but only represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the utility model. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it is not necessary to further define and explain it in the subsequent drawings. In the description of the embodiments of the utility model, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship of the utility model product when used, it is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the utility model. Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal" and "vertical" do not mean that the components must be absolutely horizontal or vertical, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure or component must be completely horizontal, but can be slightly tilted.

[0033] In the description of the embodiments of the present invention, "multiple" means at least 2.

[0034] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Example

[0035] Please refer to the instruction manual Figure 1 and 2 As shown in the instruction manual, Figure 1 and 2The utility model is shown as an automatic punching and cutting machine for plastic parts, which is mainly used for cutting and processing the plastic parts of plate parts. The automatic punching and cutting machine for plastic parts has an operating table 1 of a box-type structure. The top surface of the operating table 1 is horizontal. The top surface of the operating table 1 is provided with a lower mold group 3 that can move forward and backward. Figure 7 , 8 As shown in Figure 11, the lower mold assembly 3 includes a lower mold plate 31, which is of a rectangular structure. A transition hole 311 connected up and down is arranged in the center of the lower mold plate 31. The transition hole 311 is a rectangular hole with a relatively large opening area. A lower pad 32 fixedly connected to the lower mold plate 31 is arranged on the top surface of the lower mold plate 31. The lower pad 32 is connected by bolts for easy disassembly and assembly. A waste drop hole 321 connected up and down is arranged on the lower pad 32 to facilitate the drop of waste material after cutting. The waste drop hole 321 corresponds to the transition hole 311 up and down to avoid interference with the drop of waste material. A fixture 33 for placing plastic parts is arranged on the top surface of the lower pad 32 near the waste drop hole 321. One side of the fixture 33 corresponding to the waste drop hole 321 can protrude from the waste drop hole 321; refer to the attached manual. Fig.12 As shown, the top of the jig 33 is provided with a trough 332 for placing plastic parts. After the plastic parts are placed in the trough 332, they can be limited in the horizontal direction by the four sides of the trough 332. The bottom of the trough 332 is provided with a lower connecting hole 331 connected up and down. The side of the jig 33 corresponding to the waste hole 321 is provided with a guide groove 333 connected up and down with the waste hole 321, and the top of the groove 333 is connected to the trough 332, which is convenient for the root cutting of the upper nozzle of the plastic part and the convenient for the cut nozzle waste to fall from the waste hole 321; refer to the attached manual Figure 5As shown, a support plate 35 is provided below the bottom of the lower template 31, and the contour structure of the support plate 35 is consistent with the contour of the transition hole 311, and the support plate 35 can at least be embedded in the transition hole 311, and the support plate 35 is suspended below the bottom surface of the lower pad 32 by a suspension rod 352. In order to facilitate the adjustment of the height of the support plate 35, the suspension rod 352 is a threaded rod with an inverted T-shaped structure, which is threadedly connected to the lower pad 32. The suspension rod 352 is rotated in conjunction with the threaded connection hole at the bottom of the lower pad 32 to adjust the distance between the support plate 35 and the bottom of the lower pad 32. The support plate 35 is provided with a blanking port 311 corresponding to the transition hole 311 and the waste drop hole 321. 51, the blanking port 351 can correspond to the waste port 11 up and down, so as to facilitate the cutting of the waste material from the water outlet to fall from the waste hole 321, the transition hole 311 and the blanking port 351, and the top of the support plate 35 is provided with a top block 36 whose top corresponds to the fixture 33 up and down and is embedded, and the upper end of the top block 36 is embedded in the lower connecting hole 331, and the upper end of the top block 36 is embedded in the lower connecting hole 331 with clearance fit, and the top block 36 can be used to assist in supporting the bottom surface of the plastic part placed in the material trough 332, and the height of the top block 36 in the lower connecting hole 331 can be adjusted by adjusting the height of the support plate 35 to accommodate plastic parts of different thicknesses.

[0036] In order to facilitate the horizontal movement of the lower die set 3 on the operating table 1, the lower die set 3 is slidably connected to the operating table 1 through a linear guide rail 13, and the linear guide rail 13 is composed of a sliding rail and a slider that slide together. The slide rail is longitudinally arranged on the top surface of the operating table 1, and the lower die set 3 is fixedly connected to the slider, and two groups of linear guide rails 13 are arranged at the bottom of the lower die set 3 near the left and right sides. The two groups of linear guide rails 13 are arranged in parallel on the left and right to ensure the stability of the lower die set 3. In order to improve the processing efficiency, the lower die set 3 has two groups, which are arranged in parallel on the top surface of the operating table 1 on the left and right, and can move staggered back and forth; in order to be able to drive the lower die set 3 to move back and forth on the operating table 1, refer to the attached manual Figure 3 As shown, a linear module 16 is provided in the operating table 1, and correspondingly, the linear module 16 has two groups, corresponding to two groups of lower modules 3 respectively; a connecting block 161 whose upper end passes through the top of the operating table 1 and is fixedly connected to the lower module 3 is fixedly connected to the slide table of the linear module 16, and a connecting groove which is connected up and down and whose length matches the length of the linear guide 13 is provided on the top of the operating table 1, and the connecting block 161 passes through the connecting groove and is connected to the lower module 3, and the operating table 1 can drive the lower module 3 to move forward and backward along the linear guide 13 through the connecting block 161; a support plate 12 is set on the top surface of the operating table 1 near the rear end, and the support plate 12 is set above the top of the linear guide 13 near the rear end, and a die-cutting machine 2 which can move up and down is set on the support plate 12, refer to the attached manual Figure 1As shown, the die-cutting machine 2 includes a bracket 21, which is fixed to the top of the support plate 12, and a cutting cylinder 22 fixedly connected to it is arranged on its top surface, and the piston rod of the cutting cylinder 22 is vertically downward and passes through the top of the bracket 21 and is fixedly connected to a connecting block 23 arranged in the bracket 21, and the cutting cylinder 22 can drive the connecting block 23 to move up and down through the piston rod; two symmetrical upper guide posts 231 are arranged at the bottom of the connecting block 23 near the left and right sides, and the lower ends of the upper guide posts 231 pass through the upper guide sleeves preset on the support plate 12 and are fixedly connected to the upper die seat 24 arranged below the support plate 12, and when the connecting block 23 moves up and down, the upper guide posts 231 can drive the upper die seat 24 to move synchronously up and down. In order to ensure the stability of the upper die seat 24 when it moves up and down, the upper die seat 24 is of a rectangular structure, and a vertically upward lower guide post 241 is arranged at each of the four corners of its top, and the lower guide posts 241 are upwardly penetrated and pre-set on the support plate 12. The lower guide sleeve is provided in the upper die holder 24, and the lower guide pillar 241 and the lower guide sleeve that slide up and down can ensure the stability of the horizontal position of the upper die holder 24 when it moves up and down; the bottom of the die cutting machine 2 is provided with an upper die set 4 fixedly connected to it, specifically, the upper die set 4 is fixedly connected to the bottom surface of the upper die holder 24, and the upper die set 4 can move up and down through the die cutting machine 2, that is, the upper die holder 24, and the upper die set 4 can correspond to the lower die set 3 moved to the rear end of the operating table 1 and be plugged in up and down. When the lower die set 3 with the plastic parts is moved to the rear end of the linear guide rail 13, the upper die set 4 corresponds to the lower die set 3 up and down, and the die-cutting machine 2 can drive the upper die set 4 downward to close the mold with the lower die set 3, and the cutter 45 on the upper die set 4 can cut the sprue of the plastic parts placed on the lower die set 3; in order to correspond to the lower die set 3 and improve the processing efficiency, the die-cutting machine 2 has two groups, corresponding to the two groups of lower die sets 3 respectively, and a group of upper die sets 4 is arranged at the bottom of each group of die-cutting machines 2; refer to the attached manual Figure 4 , 6As shown in Figure 10, the upper mold assembly 4 includes an upper mold plate 41, which is fixedly connected to the upper mold base 24 by bolts. The bottom of the upper mold plate 41 is suspended by a limit block 42 through a spring pin 44. The limit block 42 can be pushed upward by the bottom and can automatically reset downward in the absence of external force. The plastic part placed on the fixture 33 can be pre-pressed and limited by the limit block 42. The center of the limit block 42 is provided with a socket 421 connected up and down. The socket 421 is embedded with a pressure block 43 that slides up and down therewith, and the top of the pressure block 43 is fixedly connected to the bottom of the upper mold plate 41. The pressure block 43 moves with the upper mold plate 41 moves synchronously, and is used to position the top of the plastic part placed on the fixture 33 to ensure that the plate plastic part will not be deformed when cutting the water outlet. A cutter 45 with a downward blade is arranged on one side of the limit block 42. The blade of the cutter 45 protrudes downward below the bottom of the limit block 42 and the pressure block 43. The top of the cutter 45 is fixedly connected to the bottom of the upper template 41, and it moves synchronously with the upper template 41. When the lower mold 3 moves to the bottom of the upper mold 4, the bottom of the cutter 45 corresponds to the top of the guide groove 333, and the cross-sectional profile size is consistent, ensuring that the cutter 45 can be embedded in the guide groove 333 downward; refer to the attached manual Fig.10 As shown, in order to ensure the downward height distance of the upper mold assembly 4, the bottom of the upper mold assembly 41 near the corner has a vertically arranged positioning column 411, and the lower mold assembly 3 is provided with a positioning sleeve 34 corresponding to the number and position of the positioning column 411. Specifically, the positioning sleeve 34 is fixedly installed on the lower pad 32. When the lower mold assembly 3 moves to the bottom of the upper mold assembly 4, the positioning column 411 on the upper mold assembly 4 corresponds to the positioning sleeve 34 up and down and can be sleeved up and down. The position of the positioning column 411 is limited by the positioning sleeve 34, thereby limiting the height position of the upper mold assembly 4. In order to facilitate the falling and collection of the cut-off nozzle waste, the top surface of the operating table 1 is provided with a waste material connected up and down at a position corresponding to the bottom of the upper mold assembly 4. The material port 11 and the waste port 11 are between two parallel linear guide rails 13, and each group of upper mold groups 4 has a corresponding waste port 11 at the bottom. When the lower mold group 3 moves to the bottom of the upper mold group 4, the material port 351 on the lower mold group 3 corresponds to the waste port 11 up and down. In order to facilitate the collection of waste from the sprue, a waste box with an opening upward and corresponding to the waste port 11 up and down is arranged inside the operating table 1; in order to facilitate the removal and placement of the plastic parts from the lower mold group 3 after the sprue is cut off, a support rack 15 is arranged on the front of the operating table 1, and a material box 14 is placed in the support rack 15. The material box 14 is embedded in the support rack 15 for direct removal, and there are two material boxes 14, which correspond to the two groups of lower mold groups 3 in the front and back respectively.

[0037] The specific working principle is as follows: the plastic part to be cut is placed in the material groove 332 of the fixture 33, the nozzle on the plastic part is set on the top of the guide groove 333, the linear module 16 drives the corresponding lower module 3 to move backward to the position directly below the upper module 4, and then the corresponding cutting cylinder 22 on the upper module 4 drives the connecting block 23 downward through its piston rod, and the connecting block 23 pushes the upper die seat 24 connected to it downward, and the upper die seat 24 drives the upper die group 4 connected to its bottom to move downward synchronously. When the upper die group 4 moves downward, the bottom of its limit block 42 first contacts the top surface of the plastic part on the fixture 33, and the upper die group 4 continues to move downward until the pressure block 43 presses against the top surface of the plastic part, and the bottom surface of the plastic part is supported by the top block 36, and at the same time, the cutting edge of the cutter 45 cuts off the nozzle on the guide groove 333 downward until the cutter 4 5, the cutting edge enters downward into the guide cutting groove 333, and the bottom of the positioning column 411 receives the positioning resistance of the positioning sleeve 34 and stops, and the waste material of the sprue cut off from the material is sequentially passed through the waste hole 321, the transition hole 311, the material outlet 351 and the waste outlet 11 from top to bottom and falls into the waste box; after processing, the upper die set 4 is reset upward, and the lower die set 3 is moved forward again through the linear die set 16, so as to drive the cut plastic parts to move out, and synchronously, the other group of lower die sets 3 moves toward the corresponding upper die set 4 after placing the plastic parts to be cut, and the operator can take out the processed plastic parts moved to the front of the operating table 1 from the fixture 33 and place them in the corresponding material box 14 and place new plastic parts to be cut; the two groups of lower die sets 3 are used to cut materials alternately, which greatly improves the efficiency of sprue cutting.

[0038] This automatic cutting machine for plastic part sprue can place the plastic part with the sprue to be cut off in a jig 33 that matches its contour, with the side of the plastic part with the sprue close to the side of the jig 33. The sprue can be completely cut off from the root from top to bottom by the cutter 45, and the cut is symmetrical and smooth, ensuring the aesthetic appearance of the plastic part after the sprue is removed and avoiding secondary correction. The automated cutting method is more stable and can effectively improve the efficiency of sprue cutting. The cost of use is also relatively low, which is convenient for industry promotion and has strong adaptability.

[0039] It should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plastic part sprue automatic punching machine, having an operating table (1) of a box-type structure, characterized in that: The top surface of the operating table (1) is provided with a lower die set (3) that can move forward and backward. A support plate (12) is mounted at a position of the top surface of the operating table (1) near the rear end. A die-cutting machine (2) that can move up and down is provided on the support plate (12). An upper die set (4) fixedly connected to the die-cutting machine (2) is provided at the bottom of the die-cutting machine (2). The upper die set (4) can move up and down through the die-cutting machine (2). The upper die set (4) can correspond to and be plugged in with the lower die set (3) moved to the rear end of the operating table (1) up and down. The upper die set (4) can cut the water outlet of the plastic part placed on the lower die set (3). A waste opening (11) that is connected up and down is provided at a position of the top surface of the operating table (1) corresponding to the bottom of the upper die set (4). A waste box that opens upward and corresponds to the waste opening (11) up and down is provided inside the operating table (1).

2. The automatic die cutting machine for plastic parts according to claim 1, characterized in that: The lower die set (3) is slidably connected to the operating table (1) via a linear guide rail (13), which has two groups and is arranged in parallel on the left and right; the die-cutting machine (2) has two groups, which correspond to the two groups of lower die sets (3), and a group of upper die sets (4) is arranged at the bottom of each group of die-cutting machines (2); a linear module (16) is arranged inside the operating table (1), and the linear module (16) has two groups, which correspond to the two groups of lower die sets (3); a connecting block (161) is fixedly connected to the slide table of the linear module (16), the upper end of which passes through the top of the operating table (1) and is fixedly connected to the lower die set (3), and the operating table (1) can drive the lower die set (3) to move forward and backward along the linear guide rail (13) through the connecting block (161).

3. The automatic die cutting machine for plastic parts according to claim 1, characterized in that: The die-cutting machine (2) comprises a bracket (21), the bracket (21) being fixed on the top of a support plate (12), the top surface of which is provided with a cutting cylinder (22) fixedly connected thereto, the piston rod of the cutting cylinder (22) being vertically downward and passing through the top of the bracket (21) and being fixedly connected to a connecting block (23) arranged in the bracket (21); two symmetrical upper guide pillars (231) are arranged at the bottom of the connecting block (23) near the left and right sides, the upper guide pillars (231) passing through an upper guide sleeve preset on the support plate (12) and being fixedly connected to an upper die seat (24) arranged below the support plate (12), and the upper die assembly (4) is fixedly connected to the bottom surface of the upper die seat (24).

4. The automatic die cutting machine for plastic parts according to claim 3, characterized in that: The upper die seat (24) is of a rectangular structure, and each of the four corners of the top thereof is provided with a lower guide column (241) pointing vertically upwards. The lower guide column (241) is inserted upwards into a lower guide sleeve preset on the support plate (12).

5. The automatic die cutting machine for plastic parts according to claim 1, characterized in that: The lower mold assembly (3) comprises a lower mold plate (31), a transition hole (311) communicating with each other up and down is arranged at the center of the lower mold plate (31), a lower pad (32) fixedly connected to the lower mold plate (31) is arranged on the top surface, a waste drop hole (321) communicating with each other up and down is arranged on the lower pad (32), the waste drop hole (321) corresponds to the transition hole (311) up and down, and a fixture (33) for placing plastic parts is arranged at a position near the waste drop hole (321) on the top surface of the lower pad (32); a support plate (35) is arranged below the bottom of the lower mold plate (31), and the support plate (35) ) matches the contour of the transition hole (311), the support plate (35) is suspended below the bottom surface of the lower pad (32) by a suspension rod (352), the suspension rod (352) is a threaded rod, and is threadedly connected to the lower pad (32), the support plate (35) is provided with a drop opening (351) corresponding to the transition hole (311) and the waste drop opening (321) in upper and lower directions, the drop opening (351) can correspond to the waste opening (11) in upper and lower directions, and the top of the support plate (35) is provided with a top block (36) whose top corresponds to the jig (33) in upper and lower directions and is embedded in the jig (33).

6. The automatic die cutting machine for plastic parts according to claim 5, characterized in that: The top of the jig (33) is provided with a material trough (332) for placing plastic parts, the bottom of the material trough (332) is provided with a lower connecting hole (331) connected up and down, and the upper end of the top block (36) is embedded in the lower connecting hole (331) with clearance fit; and a guide groove (333) connected up and down with the waste drop hole (321) is provided on one side of the jig (33) corresponding to the waste drop hole (321).

7. The automatic die cutting machine for plastic parts according to claim 1, characterized in that: The upper die assembly (4) comprises an upper die plate (41), the bottom of the upper die plate (41) being suspended by a limit block (42) via a spring pin (44), the center of the limit block (42) being provided with a plug hole (421) communicating with each other up and down, a pressing block (43) being embedded in the plug hole (421) and being slidably matched with the plug hole (421), the top of the pressing block (43) being fixedly connected to the bottom of the upper die plate (41), a cutting knife (45) with a cutting edge facing downward being provided on one side of the limit block (42), the top of the cutting knife (45) being fixedly connected to the bottom of the upper die plate (41).

8. The automatic die cutting machine for plastic parts according to claim 7, characterized in that: The bottom of the upper mold plate (41) is provided with vertically arranged positioning columns (411) at a position close to the corner, and the lower mold assembly (3) is provided with positioning sleeves (34) corresponding in number and position to the positioning columns (411).

9. The automatic die cutting machine for plastic parts according to claim 1, characterized in that: A material support rack (15) is arranged on the front of the operating table (1), a material box (14) is placed in the material support rack (15), and the material box (14) corresponds to the lower mold assembly (3) in front and back.

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