A plastic injection molding apparatus

Abstract

This utility model provides a plastic injection molding device, relating to the field of plastic production technology. It includes a worktable, with a lower mold fixedly installed in the center of the upper surface of the worktable. The lower mold has several molding holes on its bottom surface. A bracket is fixedly installed on the upper surface of the worktable, and a hydraulic cylinder is fixedly installed on the upper surface of the bracket. The output end of the hydraulic cylinder passes through the bracket and is fixedly installed with an upper mold. In this utility model, after the plastic cools, the operator removes the molded part, thus completing the injection molding. After removing the molded part, the operator starts a motor, causing its output shaft to drive a lead screw to rotate. The rotating lead screw moves a slider and a bracket through a threaded connection. The operator then activates a guide rail, causing its moving end to move a right-angle tube. Subsequently, the operator starts an air pump, causing the right-angle tube to spray air and blow out plastic residue inside the molding holes for easy cleaning.

Description

Technical Field

[0001] This utility model relates to the field of plastic production technology, and more specifically, to a plastic injection molding apparatus. Background Technology

[0002] A plastic injection molding apparatus is an automated industrial device that injects thermoplastic or thermosetting plastics into a mold cavity through heating, melting, and high pressure, and then solidifies the plastic to form a finished product. An existing plastic pipe injection molding apparatus, with publication number CN217454820U, includes a lower mold cavity and an upper mold cavity. The lower mold cavity has multiple cylindrical grooves evenly distributed, and each cylindrical groove contains a cylindrical rod. The cylindrical grooves and the cylindrical rods are coaxial, and the height of the cylindrical rod is greater than the depth of the cylindrical grooves. The upper mold cavity has multiple cylindrical through holes corresponding to the positions of the cylindrical grooves, and the inner diameter of the cylindrical through holes is equal to the inner diameter of the cylindrical grooves. The upper mold cavity is located on the top surface of the lower mold cavity, and a cylindrical rod is inserted into a cylindrical through hole, with the top of the cylindrical rod flush with the top of the cylindrical through hole. A mold cavity fixing component is provided between the upper and lower mold cavities, and the upper and lower mold cavities are fixed together by the mold cavity fixing component.

[0003] However, in the above solution, after injection molding, a lot of plastic residue will remain inside the molding hole of the lower mold cavity. Since the internal space of the molding hole is small, the plastic residue inside is not easy to be cleaned by the staff, which will have an adverse effect on the molding quality during subsequent injection molding. Utility Model Content

[0004] The main objective of this invention is to provide a plastic injection molding device that can effectively solve the problem in the prior art where a large amount of plastic residue remains inside the molding hole of the lower mold cavity after injection molding. Since the internal space of the molding hole is small, the plastic residue inside is not easy to be cleaned by the workers, which has an adverse effect on the molding quality during subsequent injection molding.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A plastic injection molding apparatus includes a worktable, on which a lower mold is fixedly installed in the middle of the upper surface of the worktable, and a plurality of molding holes are formed on the bottom surface of the lower mold.

[0007] A bracket is fixedly installed on the upper surface of the workbench, and a hydraulic cylinder is fixedly installed on the upper surface of the bracket. The output end of the hydraulic cylinder passes through the bracket and is fixedly installed with an upper mold.

[0008] A cleaning component for cleaning plastic residue inside the molding hole is provided on one side of the workbench.

[0009] Preferably, the cleaning component includes a chute, which is formed on one side of the upper surface of the workbench. A slider is slidably disposed in the chute, and a movable frame is fixedly installed on the upper surface of the slider. A guide rail is provided at the upper end of the movable frame, and a right-angle tube is fixedly installed at the movable end of the guide rail through a mounting bracket.

[0010] One side of the slide is provided with a drive structure that can drive the slider to move.

[0011] Preferably, the drive structure includes a lead screw, which is rotatably mounted between the two sides of the inner wall of the slide groove. The slider is threaded on one side of the lead screw body, and a motor is fixedly mounted on one side of the worktable. One end of the lead screw passes through the worktable and is fixedly connected to the output shaft end of the motor.

[0012] Preferably, a cylinder is fixedly installed at the bottom of the movable frame, the output end of the cylinder passes through the movable frame and is fixedly installed with a connecting plate, and the upper surface of the connecting plate is fixedly connected to the guide rail.

[0013] Preferably, uprights are fixedly installed on both sides of the upper surface of the upper mold, and the two uprights are respectively slidably disposed inside the top two sides of the bracket.

[0014] Preferably, a base frame is fixedly installed on both sides of the lower surface of the workbench.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The staff connects the right-angle tube to the air pump through a hose. Then the staff starts the cylinder, which drives the upper mold to descend. After the upper mold and the lower mold are in contact, the staff injects the plastic through the injection port of the lower mold. After the plastic cools, the staff takes out the molded part, thus completing the injection molding. After taking out the molded part, the staff starts the motor, which drives the lead screw to rotate through the output shaft. The rotating lead screw drives the slider and the bracket to move through the threaded screw. The staff starts the guide rail, which drives the right-angle tube to move through the moving end. Then the staff starts the air pump, which sprays air through the right-angle tube and blows out the plastic residue inside the molding hole, making it convenient for the staff to clean. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a plastic injection molding device according to the present invention;

[0018] Figure 2 This is a top view of a plastic injection molding device according to the present invention;

[0019] Figure 3 This utility model relates to a plastic injection molding device. Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0020] Figure 4 This is a schematic diagram of the other side of a plastic injection molding device according to the present invention.

[0021] In the diagram: 1. Workbench; 2. Lower mold; 3. Forming hole; 4. Support; 5. Cylinder; 501. Upper mold; 502. Upright pole; 6. Cleaning assembly; 601. Slide groove; 602. Slider; 603. Moving frame; 604. Guide rail; 605. Mounting frame; 606. Right-angle tube; 607. Drive structure; 6071. Lead screw; 6072. Motor; 7. Cylinder; 8. Connecting plate; 9. Base frame. Detailed Implementation

[0022] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0023] like Figures 1-4 As shown, a plastic injection molding device includes a worktable 1, a lower mold 2 is fixedly installed in the middle of the upper surface of the worktable 1, and a plurality of molding holes 3 are opened in the bottom surface of the lower mold 2.

[0024] A bracket 4 is fixedly installed on the upper surface of the workbench 1, and a hydraulic cylinder 5 is fixedly installed on the upper surface of the bracket 4. The output end of the hydraulic cylinder 5 passes through the bracket 4 and is fixedly installed with an upper mold 501.

[0025] A cleaning component 6 for cleaning plastic residue inside the molding hole 3 is provided on one side of the workbench 1.

[0026] The cleaning component 6 includes a slide 601, which is opened on one side of the upper surface of the workbench 1. A slider 602 is slidably arranged in the slide 601. A movable frame 603 is fixedly installed on the upper surface of the slider 602. A guide rail 604 is provided at the upper end of the movable frame 603. A right-angle tube 606 is fixedly installed at the moving end of the guide rail 604 through a mounting bracket 605.

[0027] A drive structure 607 is provided on one side of the slide 601 to drive the slider 602 to move;

[0028] The drive structure 607 includes a lead screw 6071, which is rotatably mounted between the two sides of the inner wall of the slide groove 601. The slider 602 is threaded on one side of the lead screw 6071. A motor 6072 is fixedly mounted on one side of the worktable 1. One end of the lead screw 6071 passes through the worktable 1 and is fixedly connected to the output shaft end of the motor 6072.

[0029] The worker connects the right-angle tube 606 to the air pump using a hose. Then, the worker starts the cylinder 5, causing its output end to lower the upper mold 501. After the upper mold 501 fits into the lower mold 2, the worker injects the plastic through the injection port of the lower mold 2. After the plastic cools, the worker removes the molded part, thus completing the injection molding. After removing the molded part, the worker starts the motor 6072, causing its output shaft to rotate the lead screw 6071. The rotating lead screw 6071 moves the slider 602 and the bracket 4 by screwing in the thread. The worker starts the guide rail 604, causing its moving end to move the right-angle tube 606. Then, the worker starts the air pump, causing the right-angle tube 606 to spray air and blow out the plastic residue inside the molding hole 3, making it easy for the worker to clean.

[0030] In another embodiment of this utility model, a hydraulic cylinder 7 is fixedly installed at the bottom of the movable frame 603. The output end of the hydraulic cylinder 7 passes through the movable frame 603 and is fixedly installed with a connecting plate 8. The upper surface of the connecting plate 8 is fixedly connected to the guide rail 604.

[0031] The staff started the cylinder 7, which caused the output end to drive the connecting plate 8 and the guide rail 604 to rise and fall, so that the pipe opening of the right angle tube 606 could be closer to the forming hole 3, thus avoiding a large amount of gas loss.

[0032] In another embodiment of this utility model, two uprights 502 are fixedly installed on both sides of the upper surface of the upper mold 501, and the two uprights 502 are respectively slidably disposed on the top sides of the bracket 4.

[0033] By setting up the upright 502, the upper mold 501 can be raised and lowered stably.

[0034] In another embodiment of this utility model, a base frame 9 is fixedly installed on both sides of the lower surface of the workbench 1.

[0035] By setting up the base frame 9, it is able to support the worktable 1.

[0036] The working principle of this plastic injection molding device:

[0037] In use, the operator connects the right-angle tube 606 to the air pump using a hose. Then, the operator starts the cylinder 5, causing its output end to lower the upper mold 501. After the upper mold 501 and the lower mold 2 are in contact, the operator injects the plastic through the injection port of the lower mold 2. After the plastic cools, the operator removes the molded part, thus completing the injection molding. After removing the molded part, the operator starts the motor 6072, causing its output shaft to drive the lead screw 6071 to rotate. The rotating lead screw 6071 drives the slider 602 and the bracket 4 to move through the threaded screw. The operator starts the guide rail 604, causing its moving end to move the right-angle tube 606. Then, the operator starts the air pump, causing the right-angle tube 606 to spray air and blow out the plastic residue inside the molding hole 3, making it easy for the operator to clean.

[0038] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A plastic injection molding device comprising a worktable (1), characterized in that: A lower mold (2) is fixedly installed in the middle of the upper surface of the workbench (1), and a number of forming holes (3) are opened on the bottom surface of the lower mold (2). A bracket (4) is fixedly installed on the upper surface of the workbench (1), and a hydraulic cylinder (5) is fixedly installed on the upper surface of the bracket (4). The output end of the hydraulic cylinder (5) passes through the bracket (4) and is fixedly installed with an upper mold (501). A cleaning component (6) for cleaning plastic residue inside the molding hole (3) is provided on one side of the workbench (1).

2. A plastic injection molding apparatus as defined in claim 1, wherein: The cleaning component (6) includes a slide (601), which is opened on one side of the upper surface of the workbench (1). A slider (602) is slidably arranged in the slide (601). A movable frame (603) is fixedly installed on the upper surface of the slider (602). A guide rail (604) is provided at the upper end of the movable frame (603). A right-angle tube (606) is fixedly installed at the moving end of the guide rail (604) through a mounting bracket (605). A drive structure (607) is provided on one side of the slide (601) to drive the slider (602) to move.

3. A plastic injection molding apparatus as defined in claim 2, wherein: The drive structure (607) includes a lead screw (6071), which is rotatably mounted between the two sides of the inner wall of the slide groove (601). The slider (602) is threaded on one side of the lead screw (6071). A motor (6072) is fixedly mounted on one side of the worktable (1). One end of the lead screw (6071) passes through the worktable (1) and is fixedly connected to the output shaft end of the motor (6072).

4. A plastic injection molding apparatus as defined in claim 3, wherein: A cylinder (7) is fixedly installed at the bottom of the movable frame (603). The output end of the cylinder (7) passes through the movable frame (603) and is fixedly installed with a connecting plate (8). The upper surface of the connecting plate (8) is fixedly connected to the guide rail (604).

5. A plastic injection molding apparatus as defined in claim 4, wherein: The upper mold (501) has two uprights (502) fixedly installed on both sides of its upper surface. The two uprights (502) are respectively slidably installed on the top sides of the bracket (4).

6. A plastic injection molding apparatus as defined in claim 5, wherein: The workbench (1) has a base frame (9) fixedly installed on both sides of its lower surface.

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