In-mold automatic cutting device for pipe fittings

Abstract

The utility model discloses a kind of pipe fitting in-mold automatic cutting device, including successively assembled top plate, fixed mould, movable mould, movable mould fixed plate, movable mould bottom plate and bottom plate, movable mould bottom plate and bottom plate between being provided with side support plate, first ejector pin plate is provided below movable mould bottom plate, second ejector pin plate is provided on bottom plate, second ejector pin plate is provided with ejector pin;Pull plate is provided on fixed mould, for driving first ejector pin plate to move, forming cavity for accommodating runner bar and product is provided between fixed mould and movable mould, the device further includes cutter device assembly, the cutter device assembly includes cutter, cutter driving block and cutter guide block, for realizing the cutting separation of runner bar and product.The utility model device uses the cutter of cutter device assembly to punch out runner bar when mould opening, realizes the separation of runner bar and product, without secondary pruning process, greatly reduce artificial cost, reduce artificial damage rate, improve labor efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of molds, and specifically relates to an automatic in-mold cutting device for pipe fittings. Background Technology

[0002] After injection molding, conventional pipe fitting molds cannot separate the runner from the product, requiring secondary trimming. Typically, this is done manually or using robotic arms; however, these methods have the following drawbacks: Manual pruning increases labor costs, and there are deviations in the pruning position during the pruning process, resulting in low efficiency. Using a robotic arm for trimming: This requires adding a robotic arm, increasing injection molding costs; removing the robotic arm also increases the injection molding cycle; if the robotic arm is damaged during production, it needs to be repaired and maintained or replaced manually. Therefore, it is necessary to design and research an automatic in-mold cutting device for pipe fittings to solve the above problems. Utility Model Content

[0003] To address the aforementioned issues, this utility model provides an automatic in-mold cutting device for pipe fittings, which solves the problems of secondary trimming of the flow channel rod and the product required in traditional processes, as well as the defects caused by them.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An automatic in-mold cutting device for pipe fittings includes a top plate, a fixed mold, a moving mold, a moving mold fixing plate, a moving mold base plate, and a base plate assembled sequentially. A side support plate is provided between the moving mold base plate and the base plate. A first ejector plate is provided below the moving mold base plate, and a second ejector plate is provided on the base plate, with ejector pins provided on the second ejector plate. A pull plate is provided on the fixed mold to drive the first ejector plate to move. A molding cavity for accommodating the runner rod and the product is provided between the fixed mold and the moving mold. The device also includes a cutting device assembly, which includes a cutter, a cutter drive block, and a cutter guide block for cutting and separating the runner rod from the product.

[0005] Furthermore, the cutter is mounted on the cutter drive block, which is installed on the first ejector plate, and the cutter guide block is installed on the moving mold, with the cutter passing through the cutter guide block.

[0006] Furthermore, the tail of the cutter is I-shaped, and an inclined slide is provided in the cutter drive block and engages with the I-shaped structure at the tail of the cutter. The cutter moves laterally within the cutter guide block by moving the cutter drive block up and down, thereby separating the cutter from the flow channel rod and the product.

[0007] Furthermore, the pull plate is provided with a sliding groove, and the first ejector plate is provided with a positioning screw. The positioning screw is movably provided through the sliding groove, thereby enabling the pull plate to move and drive the first ejector plate to move.

[0008] Furthermore, a first limiting block is provided on the first ejector plate to limit the distance between the first ejector plate and the moving mold base plate, and a second limiting block is provided on the second ejector plate to limit the distance the ejector pins eject the product.

[0009] Furthermore, a moving mold insert is provided on the moving mold base plate for supporting the flow channel rod. A spring is provided between the moving mold base plate and the moving mold to avoid friction between the cutter and the moving mold insert. The spring passes through the moving mold fixing plate.

[0010] Furthermore, the position of the ejector pin corresponds to the position of the product and the flow channel rod.

[0011] Furthermore, a reset rod is provided on the first ejector plate to reset the device after the automatic cutting action is completed.

[0012] Furthermore, several guide pillars are provided between the moving mold base plate and the base plate to guide the movement of the first ejector plate and the second ejector plate.

[0013] The present invention has the following beneficial effects: 1. When the mold is opened, the cutting blade of the cutting device assembly punches the flow channel rod to separate the flow channel rod from the product. No secondary trimming process is required, which greatly reduces labor costs and reduces the rate of damage caused by human error. 2. The device of the present invention can realize automatic demolding of pipe fittings without the need for external equipment, which reduces the product molding cycle and improves production efficiency; 3. Injection molding workers can manage multiple machines, reducing staffing requirements. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the automatic in-mold cutting device for pipe fittings of this utility model; Figure 2 Figure 1 shows a partial structural detail of the automatic in-mold cutting device for pipe fittings of this utility model. Figure 3 Figure 2 shows a partial structural detail of the automatic in-mold cutting device for pipe fittings of this utility model. Figure 4 Figure 3 shows a partial structural detail of the automatic in-mold cutting device for pipe fittings of this utility model. Figure 5 This is a diagram showing the working state of the automatic in-mold cutting device for pipe fittings of this utility model - State 1; Figure 6This is a diagram showing the working state of the automatic in-mold cutting device for pipe fittings of this utility model - State 2; Figure 7 This is a diagram showing the working state of the automatic in-mold cutting device for pipe fittings of this utility model - State 3; Figure 8 This is a diagram showing the working state of the automatic in-mold cutting device for pipe fittings of this utility model - state 4; Figure 9 This is a schematic diagram showing the cooperation between the cutter and the cutter drive block of this utility model.

[0015] In the diagram: 1. Fixed mold; 2. Pull plate; 3. Moving mold; 4. Moving mold fixing plate; 5. Moving mold base plate; 6. First limiting block; 7. First ejector plate; 8. Positioning screw; 9. Second limiting block; 10. Second ejector plate; 11. Product; 12. Cutter guide block; 13. Runner rod; 14. Cutter; 15. Cutter drive block; 16. Spring; 17. Ejector pin; 18. Reset rod; 19. Moving mold insert; 20. Top plate; 21. Base plate. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] like Figures 1-4 As shown, an automatic in-mold cutting device for pipe fittings includes a top plate 20, a fixed mold 1, a moving mold 3, a moving mold fixing plate 4, a moving mold base plate 5, and a base plate 21 assembled sequentially. A side support plate 22 is provided between the moving mold base plate 5 and the base plate 21. A first ejector plate 7 is provided below the moving mold base plate 5, and a second ejector plate 10 is provided on the base plate 21. Ejector pins 17 are provided on the second ejector plate 10. A pull plate 2 is provided on the fixed mold 1 to drive the first ejector plate 7 to move. A molding cavity for accommodating a runner rod 13 and a product 11 is provided between the fixed mold 1 and the moving mold 3. The device also includes a cutting device assembly, which includes a cutter 14, a cutter drive block 15, and a cutter guide block 12 for cutting and separating the runner rod 13 and the product 11.

[0018] The cutter 14 is mounted on the cutter drive block 15, the cutter drive block 15 is mounted on the first ejector plate 7, the cutter guide block 12 is mounted on the moving mold 3, and the cutter 14 passes through the cutter guide block 12.

[0019] The tail of the cutter 14 is H-shaped, and the cutter drive block 15 is provided with an inclined slide that engages with the H-shaped structure at the tail of the cutter 14 (see reference). Figure 9 The cutter 14 moves laterally within the cutter guide block 12 by moving the cutter drive block 15 up and down, thereby separating the cutter 14 from the flow channel rod 13 and the product 11.

[0020] The pull plate 2 is provided with a sliding groove, and the first ejector plate 7 is provided with a positioning screw 8. The positioning screw 8 is movably disposed through the sliding groove, thereby enabling the pull plate 2 to move and drive the first ejector plate 7 to move.

[0021] A first limiting block 6 is provided on the first ejector plate 7 to limit the distance between the first ejector plate 7 and the moving mold base plate 5. A second limiting block 9 is provided on the second ejector plate 10 to limit the distance of the ejector pin 17 ejecting the product.

[0022] A moving mold insert 19 is provided on the moving mold base plate 5 to support the flow channel rod 13. A spring 16 is provided between the moving mold base plate 5 and the moving mold 3 to avoid friction between the cutter 14 and the moving mold insert 19. The spring 16 passes through the moving mold fixing plate 4.

[0023] The position of the ejector pin 17 corresponds to the position of the product 11 and the flow channel rod 13.

[0024] A reset rod 18 is also provided on the first ejector plate 7 to reset the device after the automatic cutting action is completed.

[0025] Several guide pillars are also provided between the moving mold base plate 5 and the base plate 21 to guide the movement of the first ejector plate 7 and the second ejector plate 10.

[0026] The technical solution of the automatic in-mold cutting device for pipe fittings of this utility model is as follows: Step 1: After injection molding is completed, the moving mold 3, moving mold fixing plate 4, cutting device assembly, and product 11 float upwards via spring 16 to prevent the cutting blade 14 from rubbing against the moving mold insert 19 and to prevent impurities generated by friction from entering the product. Therefore, the opening is made, which is 4mm. At this time, the distance between the cutting blade 14 and the runner rod 13 to be cut is the farthest (referred to as state 1, see reference). Figure 5 ); Step 2: Pull plate 2 is fixed on fixed mold 1. Fixed mold 1 continues to move under the action of injection molding machine. Pull plate 2 touches the positioning screw 8 of the first ejector plate 7. At this time, the fixed mold opens 150mm, leaving room for the product to fall (referred to as state 2, see reference). Figure 6 ); Step 3: The stationary mold 1 continues to move (approximately 50mm), driving the first ejector plate 7 to continue moving. Under the action of the first ejector plate 7, the cutter drive block 15 moves upward. The cutter 14 cuts towards the flow channel rod 13 under the action of the inclined slide within the cutter drive block 15 until it cuts through. At this time, the first limit block 6 on the first ejector plate 7 touches the moving mold base plate 5, and the first ejector plate 7 stops moving (recorded as state 3, see reference). Figure 7 ); Step 4: Driven by the ejector roller of the injection molding machine, the second ejector plate 10 begins to move, and the ejector pin 17 ejects the product 11 and the cut-off runner rod 13, causing them to fall. The entire action is completed. The fixed mold 1 begins to return to its original position. After encountering the reset rod 18, the cutter 14, the ejector plate, and other parts gradually reset, and the injection molding continues (referred to as state 4, see reference). Figure 8 ).

[0027] It should be noted that the number of guide rods, reset rods 18, and second limiting blocks 9 in this application are all four; the moving mold 3, moving mold fixing plate 4, moving mold base plate 5, and first ejector plate 7 of this invention are all provided with through holes for the corresponding guide rods, cutter drive blocks 15, and ejector pins 17 to pass through; the top plate 20 is provided with a sprue, and the space between the fixed mold 1 and the moving mold 3 is a casting cavity. Other matters not covered herein are all existing conventional technologies in the injection molding field and will not be elaborated here.

[0028] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An automatic in-mold cutting device for pipe fittings, characterized in that, The device includes a top plate (20), a fixed mold (1), a moving mold (3), a moving mold fixing plate (4), a moving mold base plate (5), and a base plate (21) assembled in sequence. A side support plate (22) is provided between the moving mold base plate (5) and the base plate (21). A first ejector plate (7) is provided below the moving mold base plate (5), and a second ejector plate (10) is provided on the base plate (21). An ejector pin (17) is provided on the second ejector plate (10). A pull plate (2) is provided on the fixed mold (1) to drive the first ejector plate (7) to move. A molding cavity for accommodating the runner rod (13) and the product (11) is provided between the fixed mold (1) and the moving mold (3). The device also includes a cutting device assembly, which includes a cutter (14), a cutter drive block (15), and a cutter guide block (12) for cutting and separating the runner rod (13) and the product (11).

2. The automatic in-mold cutting device for pipe fittings according to claim 1, characterized in that, The cutter (14) is mounted on the cutter drive block (15), the cutter drive block (15) is mounted on the first ejector plate (7), the cutter guide block (12) is mounted on the moving mold (3), and the cutter (14) passes through the cutter guide block (12).

3. The automatic in-mold cutting device for pipe fittings according to claim 2, characterized in that, The tail of the cutter (14) is I-shaped. The cutter drive block (15) is provided with an inclined slide and engages with the I-shaped structure at the tail of the cutter (14). The cutter (14) moves laterally within the cutter guide block (12) by moving the cutter drive block (15) up and down, thereby achieving the separation of the cutter (14) from the flow channel rod (13) and the product (11).

4. The automatic in-mold cutting device for pipe fittings according to claim 1, characterized in that, The pull plate (2) is provided with a sliding groove, and the first ejector plate (7) is provided with a positioning screw (8). The positioning screw (8) is movably passed through the sliding groove, thereby enabling the pull plate (2) to move and drive the first ejector plate (7) to move.

5. The automatic in-mold cutting device for pipe fittings according to claim 1, characterized in that, A first limiting block (6) is provided on the first ejector plate (7) to limit the distance between the first ejector plate (7) and the moving mold base plate (5). A second limiting block (9) is provided on the second ejector plate (10) to limit the distance of the ejector pin (17) from ejecting the product.

6. The automatic in-mold cutting device for pipe fittings according to claim 1, characterized in that, A moving mold insert (19) is provided on the moving mold base plate (5) for supporting the flow channel rod (13). A spring (16) is provided between the moving mold base plate (5) and the moving mold (3) to avoid friction between the cutter (14) and the moving mold insert (19). The spring (16) passes through the moving mold fixing plate (4).

7. The automatic in-mold cutting device for pipe fittings according to claim 1, characterized in that, The position of the ejector pin (17) corresponds to the position of the product (11) and the flow channel rod (13).

8. The automatic in-mold cutting device for pipe fittings according to claim 1, characterized in that, A reset rod (18) is also provided on the first ejector plate (7) to reset the device after the automatic cutting action is completed.

9. The automatic in-mold cutting device for pipe fittings according to claim 1, characterized in that, Several guide pillars are also provided between the moving mold base plate (5) and the base plate (21) to guide the movement of the first ejector plate (7) and the second ejector plate (10).

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