An injection molding machine for producing plastic parts

Abstract

The application provides an injection molding machine for plastic part production and relates to the technical field of automotive interiors, and comprises a U-shaped base, a mounting table fixedly arranged at the top of the U-shaped base, four groups of supporting columns fixedly arranged at the top of the mounting table, and a top injection cavity fixedly arranged at the top of the supporting column; an injection channel is fixedly arranged in the middle of the top injection cavity; a sliding valve disc is fixedly arranged at the bottom of the injection channel; a sliding valve core is slidingly arranged in the sliding valve disc; a sealing plate is fixedly arranged at the bottom of the sliding valve disc; and an injection head is fixedly arranged at the bottom of the sealing plate; the sliding valve core is arranged to provide a valve control structure capable of being automatically opened, a driving lifting lead screw is rotated to make a movable injection port contact the injection head to be in abutment and docking, then a compound mold continues to rise, the top surface of the compound mold contacts a spring rod to push the spring rod upward, the sliding valve core is no longer blocked from the injection head, injection is performed, and the problem that existing equipment lacks an automatically opened and closed valve is solved.

Description

Technical Field

[0001] This invention relates to the field of automotive interior technology, and in particular to an injection molding machine for producing plastic parts. Background Technology

[0002] Plastic parts for automotive interiors are mainly manufactured using injection molding. Conventional injection molding equipment uses a combination of mobile injection molding machines or molds. The injection port is controlled by a separate valve, which is opened to allow injection when the injection head contacts the injection port of the mold.

[0003] The injection molding machines currently in use have the following disadvantages:

[0004] 1. Lack of a valve control structure that can automatically deploy during the injection molding process;

[0005] 2. It is inconvenient to automatically separate the mold and guide the workpiece out during the reset process;

[0006] 3. Lack of an active demolding structure that can effectively prevent mold jamming. Summary of the Invention

[0007] In view of the above, the present invention addresses the shortcomings of the prior art by providing an injection molding machine for producing plastic parts.

[0008] This invention provides an injection molding machine for producing plastic parts, specifically comprising: a U-shaped base, a mounting platform fixedly disposed on the top of the U-shaped base, four sets of support columns fixedly disposed on the top of the mounting platform, a top injection chamber fixedly disposed on the top of the support columns; an injection channel fixedly disposed in the middle of the top injection chamber; a sliding valve disc fixedly disposed at the bottom of the injection channel, a sliding valve core slidably disposed within the sliding valve disc; a sealing plate fixedly disposed at the bottom of the sliding valve disc, an injection head fixedly disposed at the bottom of the sealing plate; and four sets of vertical guide rods fixedly disposed between the mounting platform and the top injection chamber, the four sets of vertical guide rods sliding outwards. The system is equipped with a composite mold. The main body of the composite mold is a top mold, and both sides of the composite mold are downward-turned side plate structures. Side guide rods are fixedly installed on the inner side of the composite mold. Two sets of sliding side molds are slidably installed outside the side guide rods on both sides. The top of the sliding side molds matches the middle of the bottom of the composite mold. Springs are sleeved on the outside of the side guide rods. The two sets of sliding side molds are joined together by the springs outside the side guide rods. An extension structure is integrally installed in the middle of the outer side of the composite mold. Assembly wedges are fixedly installed on the outside and below the extension structure. A through hole is opened in the extension structure and the assembly wedge.

[0009] Optionally, the mounting platform has a discharge through hole in the middle, and an output channel is fixedly provided at the bottom of the through hole, with the output channel inclined downwards and outwards.

[0010] Optionally, two sets of trapezoidal trigger blocks are fixedly installed on the top middle sides of the mounting platform. When the assembly wedge descends, it can contact the trapezoidal trigger blocks, and the assembly wedge and the inclined surface of the trapezoidal trigger blocks are in contact.

[0011] Optionally, a spiral propeller is rotatably installed in the injection channel, and an injection motor is fixedly installed at the top of the injection channel, with the injection motor and the spiral propeller being connected in a transmission manner; two sets of trapezoidal buckets are connected to both sides of the injection channel, and the trapezoidal buckets are fitted into the top injection chamber, with the top of the trapezoidal buckets flush with the top of the top injection chamber; a heater is also installed between the outside of the injection channel and the top injection chamber; the heater is cylindrical, and a heat insulation layer is installed on the outside of the heater; two sets of positioning pins are fixedly installed at the bottom of the top injection chamber, with the bottom edge of the positioning pins having an arc structure, and the positioning pins can fit into the docking holes.

[0012] Optionally, the sliding valve core is integrally provided with four sets of support legs, and a spring rod is fixedly provided in the middle of each support leg. The upper end of the spring rod extends out of the sliding valve disc, and the bottom of the spring rod passes through the sealing plate, where a spring is sleeved and a baffle is installed.

[0013] Optionally, two sets of lifting screws are rotatably arranged between the mounting platform and the top injection chamber, and the two sets of lifting screws are respectively threaded to both sides of the composite mold; a drive motor is fixedly arranged in the U-shaped base, and the drive motor is connected to the bottom end of the two sets of lifting screws by a bevel gear set for transmission.

[0014] Optionally, the composite mold has a stepped through hole in the middle that is wider at the top and narrower at the bottom. A movable injection port is slidably disposed in the stepped through hole. The main body of the movable injection port has a T-shaped structure, and a spring is provided at the bottom of the movable injection port. An inner clamp is provided at the top inside the stepped through hole. When the injection head descends, it can fit into contact with the movable injection port.

[0015] Optionally, two sets of trigger pistons are fixedly installed at the bottom of the composite mold, and a demolding piston is fixedly installed inside the composite mold. The telescopic end of the demolding piston fits into the bottom of the composite mold; the trigger piston and the demolding piston are connected by a pipeline.

[0016] Optionally, two sets of trigger posts are fixedly installed on the top of the mounting platform, so that when the trigger piston descends, the telescopic end of the trigger piston can contact the trigger posts.

[0017] The beneficial effects are as follows:

[0018] 1. This invention is equipped with a sliding valve core, providing a valve control structure that can automatically open. It drives the lifting screw to rotate, stably raising the composite mold. The movable injection port contacts the injection head and mates with it. Then the composite mold continues to rise, and the top surface of the composite mold contacts the spring rod, pushing the spring rod upward and causing the sliding valve core to rise. At this time, the sliding valve core no longer blocks the injection head, and injection can be performed using the injection head. Conversely, it can automatically stop injection, acting as a one-way valve.

[0019] 2. The present invention has an automatically separating mold structure. When the composite mold descends, the assembly wedge block contacts the trapezoidal trigger block and automatically separates to both sides through the guide. Then the sliding molds on both sides separate, contacting the restriction on the workpiece, and the injection molded workpiece can fall naturally. The subsequent workpiece falls into the output channel and is guided out. Therefore, a carrying container can be set below the output channel to continuously collect the workpiece and realize fully automatic production.

[0020] 3. This invention has an active demolding function. To avoid workpiece sticking to the mold, during the separation of the two sliding mold sides, the trigger piston continues to descend and contacts the trigger post, generating a thrust to cause the trigger piston to contract. This inputs the air inside the trigger piston into the demolding piston, opening the demolding piston and pushing the workpiece downward to fall off, thus achieving automatic demolding and ensuring workpiece demolding. Attached Figure Description

[0021] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the present invention is shown;

[0022] Figure 2 A schematic diagram of the injection molding state structure of an embodiment of the present invention is shown;

[0023] Figure 3 A schematic diagram of the demolding state structure of an embodiment of the present invention is shown;

[0024] Figure 4 An embodiment of the present invention is shown. Figure 1 A schematic diagram of the side view structure;

[0025] Figure 5 An embodiment of the present invention is shown. Figure 3 Another structural diagram from a different angle;

[0026] Figure 6 This diagram shows a three-dimensional cross-sectional view of the injection channel in an embodiment of the present invention.

[0027] Figure 7 A three-dimensional disassembly diagram of the composite mold in an embodiment of the present invention is shown;

[0028] Figure 8 An embodiment of the present invention is shown. Figure 7 A schematic diagram of the tilting structure.

[0029] List of reference numerals in the attached diagram:

[0030] 1. U-shaped base; 101. Mounting platform; 102. Support column; 103. Top injection chamber; 104. Output channel; 105. Trapezoidal trigger block; 106. Vertical guide rod; 107. Trigger post; 108. Lifting screw; 109. Positioning post; 2. Injection channel; 201. Screw propeller; 202. Injection motor; 203. Trapezoidal hopper; 204. Sliding valve disc; 205. Sliding valve core; 206. Spring rod; 3. Sealing plate; 301. Injection head; 4. Drive motor; 5. Heater; 6. Composite mold; 601. Movable injection port; 602. Side guide rod; 603. Sliding side mold; 604. Assembly wedge; 605. Docking hole; 606. Trigger piston; 607. Demolding piston. Detailed Implementation

[0031] To make the objectives, solutions, and advantages of the technical solutions of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention.

[0032] Example 1: Please refer to the accompanying drawings in the instruction manual. Figures 1 to 8 As shown:

[0033] This invention proposes an injection molding machine for producing plastic parts, comprising: a U-shaped base 1, a mounting platform 101 fixedly mounted on the top of the U-shaped base 1, four sets of support columns 102 fixedly mounted on the top of the mounting platform 101, a top injection chamber 103 fixedly mounted on the top of the support columns 102; an injection channel 2 fixedly mounted in the middle of the top injection chamber 103; a sliding valve disc 204 fixedly mounted at the bottom of the injection channel 2, a sliding valve core 205 slidably mounted within the sliding valve disc 204; a sealing plate 3 fixedly mounted at the bottom of the sliding valve disc 204, an injection head 301 fixedly mounted at the bottom of the sealing plate 3; and four sets of vertical guide rods 106 fixedly mounted between the mounting platform 101 and the top injection chamber 103. A composite mold 6 is slidably mounted on the outside of the 106. The main body of the composite mold 6 is a top mold, and both sides of the composite mold 6 are downward-turned side plate structures. Side guide rods 602 are fixedly mounted on the inner side of the composite mold 6. Two sets of sliding side molds 603 are slidably mounted on the outside of the side guide rods 602. The top of the sliding side molds 603 matches the middle of the bottom of the composite mold 6. Springs are sleeved on the outside of the side guide rods 602. The two sets of sliding side molds 603 are joined together by the springs on the outside of the side guide rods 602. An extension structure is integrally mounted on the middle of the outer side of the composite mold 6. Assembly wedges 604 are fixedly mounted on the outside and below the extension structure. A mating hole 605 is opened through the extension structure and the assembly wedges 604.

[0034] The mounting platform 101 has a discharge through hole in the middle, and an output channel 104 is fixedly installed at the bottom of the through hole. The output channel 104 is inclined to the outside and downward.

[0035] Two sets of trapezoidal trigger blocks 105 are fixedly installed on the top middle sides of the mounting platform 101. When the assembly wedge 604 descends, it can contact the trapezoidal trigger blocks 105, and the assembly wedge 604 fits against the inclined surface of the trapezoidal trigger blocks 105.

[0036] The injection channel 2 is equipped with a rotating screw propeller 201, and an injection motor 202 is fixedly installed at the top of the injection channel 2. The injection motor 202 is connected to the screw propeller 201 for transmission. Two sets of trapezoidal buckets 203 are connected to both sides of the injection channel 2. The trapezoidal buckets 203 are installed in the top injection chamber 103, and the top of the trapezoidal buckets 203 is flush with the top of the top injection chamber 103. A heater 5 is also provided between the outside of the injection channel 2 and the top injection chamber 103. The heater 5 is cylindrical and has a heat insulation layer on the outside. Two sets of positioning pins 109 are fixedly installed at the bottom of the top injection chamber 103. The bottom edge of the positioning pins 109 has an arc structure and can be inserted into the docking hole 605.

[0037] The sliding valve core 205 is integrally provided with four sets of support feet. A spring rod 206 is fixedly installed in the middle of each support foot. The upper end of the spring rod 206 extends through the sliding valve disc 204, and the bottom of the spring rod 206 passes through the sealing plate 3, where a spring is sleeved and a baffle is installed. The spring rod 206 is slidably connected to the sealing plate 3 and the sliding valve disc 204. A silicone sealing ring with a melting point higher than that of plastic can be used to maintain the sealing performance.

[0038] Two sets of lifting screws 108 are rotatably arranged between the mounting platform 101 and the top injection chamber 103. The two sets of lifting screws 108 are respectively threaded to both sides of the composite mold 6. A drive motor 4 is fixedly installed in the U-shaped base 1. The drive motor 4 is connected to the bottom end of the two sets of lifting screws 108 by a bevel gear transmission.

[0039] Among them, the composite mold 6 has a stepped through hole in the middle that is wider at the top and narrower at the bottom. A movable injection port 601 is slidably arranged in the stepped through hole. The main body of the movable injection port 601 is T-shaped and a spring is provided at the bottom of the movable injection port 601. An inner clamp is provided at the top inside the stepped through hole. When the injection head 301 descends, it can fit into contact with the movable injection port 601.

[0040] Two sets of trigger pistons 606 are fixedly installed at the bottom of the composite mold 6, and a demolding piston 607 is fixedly installed inside the composite mold 6. The telescopic end of the demolding piston 607 matches the bottom of the composite mold 6. The trigger piston 606 and the demolding piston 607 are connected by a pipeline.

[0041] Two sets of trigger posts 107 are fixedly installed on the top of the mounting platform 101. When the trigger piston 606 descends, the telescopic end of the trigger piston 606 can contact the trigger post 107.

[0042] like Figure 1-8 As shown, before manufacturing, the injection molding material is put into the trapezoidal hopper 203, and the heater 5 is used to heat the injection channel 2 to melt the material; during injection, the screw propeller 201 is driven to rotate by the injection motor 202 to provide thrust.

[0043] The drive motor 4 is started to drive the lifting screw 108 to rotate, which stably lifts the composite mold 6. The movable injection port 601 contacts the injection head 301 and fits together. Then the composite mold 6 continues to rise. The top surface of the composite mold 6 contacts the spring rod 206 and pushes the spring rod 206 upward, which drives the sliding valve core 205 to rise.

[0044] At this time, the sliding valve core 205 no longer blocks the injection head 301. The liquid flows through the side of the sliding valve core 205 into the injection head 301, and injection is performed using the injection head 301. The side of the composite mold 6 is provided with micro venting grooves to ensure injection.

[0045] Example 2: Based on Example 1, after injection molding is completed, the reverse lifting screw 108 lowers the composite mold 6, and the movable injection port 601 is automatically reset by the spring; the sliding valve core 205 is automatically reset by the external spring of the spring rod 206, blocking the injection liquid;

[0046] When the composite mold 6 descends, the assembly wedge 604 contacts the trapezoidal trigger block 105 and automatically separates to both sides through the guide. Then, the sliding molds 603 on both sides separate, contacting the restriction on the workpiece, and the injection molded workpiece can fall naturally.

[0047] The shapes of the composite mold 6 and the sliding side mold 603 are made according to the shape of the workpiece and can be replaced as needed. The workpiece has a regular symmetrical structure and can be manufactured accordingly.

[0048] After demolding, the workpiece falls into the output channel 104 and is guided out. A carrying container is set below the output channel 104 to continuously collect the workpiece, realizing fully automatic production.

[0049] Example 3: Based on Example 2, after the two sliding side molds 603 are separated, some of the workpiece tops may be stuck or jammed under the composite mold 6;

[0050] Therefore, during the separation of the two sliding side molds 603, the trigger piston 606 continues to descend and contacts the trigger post 107, generating a thrust that causes the trigger piston 606 to contract, inputting the air inside the trigger piston 606 into the demolding piston 607, opening the demolding piston 607, and pushing the workpiece downward to fall off, thus achieving automatic demolding.

[0051] The specific usage and function of this embodiment are as follows: In this invention, when in use, the injection molding material is put into the trapezoidal hopper 203, and the heater 5 is used to heat the injection channel 2 to melt the material; during injection molding, the screw propeller 201 is driven to rotate by the injection motor 202 to provide thrust.

[0052] The drive motor 4 is started, which drives the lifting screw 108 to rotate and stably raise the composite mold 6. The movable injection port 601 contacts the injection head 301 for mating and docking. Then, the composite mold 6 continues to rise, and the top surface of the composite mold 6 contacts the spring rod 206, pushing the spring rod 206 upward and causing the sliding valve core 205 to rise. At this time, the sliding valve core 205 no longer blocks the injection head 301, and injection can be performed using the injection head 301. After injection is completed, the lifting screw 108 is reversed to lower the composite mold 6. The movable injection port 601 is automatically reset by the spring. The sliding valve core 205 is automatically reset by the external spring of the spring rod 206, blocking the injection liquid.

[0053] When the composite mold 6 descends, the assembly wedge 604 contacts the trapezoidal trigger block 105 and automatically separates to both sides through the guide. Then, the two sliding side molds 603 separate, removing the restriction on the workpiece, and the injection molded workpiece can fall naturally. However, the top of some workpieces sticks or gets stuck under the composite mold 6. Therefore, during the separation of the two sliding side molds 603, the trigger piston 606 continues to descend and contacts the trigger post 107, generating a thrust to cause the trigger piston 606 to contract. This inputs the air in the trigger piston 606 into the demolding piston 607, opening the demolding piston 607 and pushing the workpiece downward to fall off, thus achieving automatic demolding.

[0054] After demolding, the workpiece falls into the output channel 104 and is guided out. A carrying container is set below the output channel 104 to continuously collect the workpiece, realizing fully automatic production.

Claims

1. An injection molding machine for producing plastic parts, characterized in that, include: A U-shaped base (1) is provided with a mounting platform (101) fixedly mounted on top of the U-shaped base (1). Four sets of support columns (102) are fixedly mounted on top of the mounting platform (101). A top injection chamber (103) is fixedly mounted on top of the support columns (102). An injection channel (2) is fixedly mounted in the middle of the top injection chamber (103). A sliding valve disc (204) is fixedly mounted at the bottom of the injection channel (2). A sliding valve core (205) is slidably mounted inside the sliding valve disc (204). A sealing plate (3) is fixedly mounted at the bottom of the sliding valve disc (204). An injection head (301) is fixedly mounted at the bottom of the sealing plate (3). Four sets of vertical guides are fixedly mounted between the mounting platform (101) and the top injection chamber (103). The composite mold (6) is slidably mounted on four sets of vertical guide rods (106). The main body of the composite mold (6) is a top mold. Both sides of the composite mold (6) are downward-turned side plate structures. Side guide rods (602) are fixedly mounted on the inner side of the composite mold (6). Two sets of sliding side molds (603) are slidably mounted on the outside of the two side guide rods (602). The top of the sliding side molds (603) matches the middle of the bottom of the composite mold (6). Springs are sleeved on the outside of the side guide rods (602). The two sets of sliding side molds (603) are joined together by the springs outside the side guide rods (602). An extension structure is integrally mounted on the middle of the outer side of the composite mold (6). The extension structure is fixed on the outside and below. An assembly wedge (604) is provided; a connecting hole (605) is provided through the extension structure and the assembly wedge (604); a stepped through hole with a wider top and narrower bottom is provided in the middle of the composite mold (6), and a movable injection port (601) is slidably provided in the stepped through hole. The main body of the movable injection port (601) is T-shaped, and a spring is provided at the bottom of the movable injection port (601); an inner clamp is provided at the top inside the stepped through hole; when the injection head (301) descends, it comes into contact with the movable injection port (601); two sets of trigger pistons (606) are fixedly provided at the bottom of the composite mold (6), and a demolding piston (607) is fixedly provided inside the composite mold (6). The telescopic end of the demolding piston (607) fits into the bottom of the composite mold (6); Pipes are connected to the piston (606) and the demolding piston (607); two sets of trigger pins (107) are fixedly installed on the top of the mounting platform (101). When the trigger piston (606) descends, the telescopic end of the trigger piston (606) contacts the trigger pin (107); two sets of trapezoidal trigger blocks (105) are fixedly installed on both sides of the top middle of the mounting platform (101). When the assembly wedge (604) descends, it contacts the trapezoidal trigger block (105), and the inclined surface of the assembly wedge (604) fits against the trapezoidal trigger block (105); two sets of lifting screws (108) are rotatably installed between the mounting platform (101) and the top injection chamber (103). The two sets of lifting screws (108) are respectively threaded to both sides of the composite mold (6);A drive motor (4) is fixedly installed in the U-shaped base (1), and the drive motor (4) is connected to the bottom end of the two sets of lifting screws (108) by a bevel gear transmission.

2. The injection molding machine for producing plastic parts as described in claim 1, characterized in that, The mounting platform (101) has a discharge through hole in the middle, and an output channel (104) is fixedly installed at the bottom of the through hole. The output channel (104) is inclined to the outside and downward.

3. The injection molding machine for producing plastic parts as described in claim 1, characterized in that, A spiral propeller (201) is rotatably installed in the injection channel (2), and an injection motor (202) is fixedly installed at the top of the injection channel (2). The injection motor (202) is connected to the spiral propeller (201) for transmission. Two sets of trapezoidal buckets (203) are connected to both sides of the injection channel (2). The trapezoidal buckets (203) are installed in the top injection chamber (103) and the top of the trapezoidal buckets (203) are flush with the top of the top injection chamber (103). A heater (5) is also installed between the outside of the injection channel (2) and the top injection chamber (103). The heater (5) is cylindrical and has a heat insulation layer on the outside. Two sets of positioning piles (109) are fixedly installed at the bottom of the top injection chamber (103). The bottom edge of the positioning pile (109) is an arc structure and the positioning pile (109) is inserted into the docking hole (605).

4. The injection molding machine for producing plastic parts as described in claim 1, characterized in that, The sliding valve core (205) is integrally provided with four sets of support legs. A spring rod (206) is fixedly provided in the middle of each support leg. The upper end of the spring rod (206) passes through the sliding valve disc (204), and the bottom of the spring rod (206) passes through the sealing plate (3) to fit a spring and install a baffle.

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