Mechanical part injection mold for mechanically cutting sprue

Abstract

The utility model belongs to the technical field of injection molds, and particularly relates to a mechanical part injection mold for mechanical sprue cutting, which comprises a lower injection mold, a push block is slidably connected to the top end of the lower injection mold, and the bottom end of the push block extends into the lower injection mold and is fixedly connected with a connecting rod. A working spring is fixedly connected to the connecting part of the connecting rod and the injection molding lower mold, a telescopic sliding block which is in sliding connection with the inner wall of the injection molding lower mold is fixedly connected to one end of the connecting rod, and a lifting sliding block is embedded in the top end of the telescopic sliding block. The connecting rod moves to drive the telescopic sliding block to slide along the inner wall of the injection molding lower mold, the telescopic sliding block slides to drive the lifting sliding block to vertically slide through the limiting strip, the lifting sliding block slides to drive the working cutter to move relative to the injection molding material, the injection molding material is cut, and therefore the injection molding material is separated from an injection molding part. And the finishing time of workers on the injection molding part is greatly shortened.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds, and in particular relates to an injection mold for mechanical parts with a mechanical gate cut. Background Art

[0002] Injection molding is a method of producing industrial products. Products usually use rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding and die casting. After the product is injected, the injection plastic will be attached to the outer wall of the product and needs to be cut by mechanical cutting gate.

[0003] For example, the patent with publication number CN213055823U discloses an automatic cutting structure of a mechanical gate of an injection mold, including a mold body, the mold body including a panel, a fixed mold plate, a movable mold plate, a square iron and a top plate, a panel is installed on the upper side of the fixed mold plate, a hot runner is opened between the panel and the fixed mold plate, a positioning ring is connected to the middle part of the upper side of the panel by screws, the positioning ring is located on the upper side of the fixed mold plate, a movable mold plate is installed on the lower side of the fixed mold plate, a square iron is placed on the outer edge of the lower side of the movable mold plate, the square iron and the movable mold plate are connected by bolts, the bottom of the square iron is connected to the top plate by bolts, a lower ejector plate is placed in the middle part of the upper side of the top plate, an upper ejector plate is placed on the upper side of the lower ejector plate, a limiting pull rod is installed on the right side between the lower ejector plate and the upper ejector plate, when the injection molding machine ejects, the upper ejector plate is first pushed by the ejector block, and the upper ejector plate pushes the cutting blade to cut off the gate through the cutting knife connecting rod.

[0004] The existing mechanical gate cutting mechanical parts injection mold needs to cut off the gate when in use, but the gate cutting position is far away from the injection molded part, resulting in residual injection material on the outer wall of the injection molded part, which requires manual trimming. In view of this, we propose a mechanical gate cutting mechanical parts injection mold. Utility Model Content

[0005] The utility model aims to solve the above-mentioned technical problems and provide a mechanical part injection mold with a mechanical gate cutter to avoid the problem of residual injection material on the outer wall of the injection molded part and the need for manual trimming.

[0006] In view of this, the utility model provides a mechanical part injection mold for cutting a gate, comprising an injection lower mold, the top end of the injection lower mold is slidably connected with a push block, the bottom end of the push block extends to the inside of the injection lower mold and is fixedly connected with a connecting rod, the connecting portion of the connecting rod and the injection lower mold is fixedly connected with a working spring, one end of the connecting rod is fixedly connected with a telescopic slider slidably connected with the inner wall of the injection lower mold, the top end of the telescopic slider is embedded with a lifting slider, the connecting portion of the lifting slider and the telescopic slider is provided with a limiting strip, the top end of the lifting slider extends to the top of the injection lower mold and is fixedly connected with a working cutter, the inside of the working cutter is penetrated by injection plastic, and one end of the injection plastic is fixedly connected with an injection molded part;

[0007] The injection molding component is located outside the lower injection mold and is used for performing injection molding operations on the injection molded part.

[0008] Based on the above structure, the movement of the push block drives the connecting rod to overcome the elastic force of the working spring, and the movement of the connecting rod drives the telescopic slider to slide along the inner wall of the lower injection mold. The sliding of the telescopic slider drives the lifting slider to slide vertically through the limit bar, and the sliding of the lifting slider drives the working cutter and the injection molded material to move relative to each other, cutting the injection molded material to separate the injection molded material from the injection molded part, thereby greatly reducing the time for staff to trim the injection molded part.

[0009] Preferably, the connection portion between the telescopic slider and the lifting slider is inclined.

[0010] Preferably, the cross section of the limiting strip is in a "T" shape.

[0011] Preferably, the working cutter has a ring-shaped shape, and the working cutter forms a telescopic structure with the lower injection mold through a telescopic slider and a lifting slider.

[0012] Preferably, the injection molding component comprises:

[0013] A limiting column, the outer wall of the injection lower mold passes through the limiting column, the bottom end of the limiting column is fixedly connected to a base, the top of the base is fixedly connected to an ejector seat, the top of the ejector seat is fixedly connected to an ejector body that fits the bottom end of the injection molded part, the connecting part between the ejector seat and the injection lower mold is fixedly connected to an ejector spring, the top of the injection lower mold is fitted with an injection upper mold that is slidably connected to the outer wall of the limiting column, the top of the injection upper mold is fixedly connected to an upper mold cover, the top of the upper mold cover is fixedly connected to a gate body, the bottom end of the gate body is threadedly connected to a cutting piece, and the outer wall of the cutting piece is fixedly connected to a cutting knife that fits the injection plastic.

[0014] Preferably, two groups of the cutting blades are provided, and the two groups of the cutting blades are centrally symmetrical about the cutting piece.

[0015] Preferably, the cutting knife has a spiral shape.

[0016] The beneficial effects of the utility model are:

[0017] 1. The mechanical accessory injection mold of the mechanical gate cutting device is provided with a working cutter. The movement of the push block drives the connecting rod to overcome the elastic force of the working spring. The movement of the connecting rod drives the telescopic slider to slide along the inner wall of the lower injection mold. The sliding of the telescopic slider drives the lifting slider to slide vertically through the limit bar. The sliding of the lifting slider drives the working cutter and the injection material to move relative to each other, and the injection material is cut to separate the injection material from the injection molded part, which greatly reduces the time for the staff to trim the injection molded part.

[0018] 2. The mechanical accessory injection mold of the mechanical cutting gate is provided with a cutting piece. The injection upper mold slides along the outer wall of the limit column and moves away from the injection lower mold. The movement of the injection upper mold drives the gate body to move synchronously. The gate body drives the cutting knife on the outer wall of the cutting piece to move relative to the injection plastic. The injection plastic is cut by the spiral cutting knife to prevent the injection plastic from clogging the gate body after hardening. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the overall three-dimensional unfolded structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the lower injection mold of the utility model;

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 It is a schematic diagram of the connection structure of the cutting piece of the utility model.

[0024] The symbols in the figure are:

[0025] 1. Injection lower mold; 2. Push block; 3. Connecting rod; 4. Working spring; 5. Telescopic slider; 6. Lifting slider; 7. Limiting strip; 8. Working cutter; 9. Injection plastic; 10. Injection molded part; 11. Limiting column; 12. Base; 13. Ejector seat; 14. Ejector body; 15. Ejector spring; 16. Injection upper mold; 17. Upper mold cover; 18. Gate body; 19. Cutting piece; 20. Cutting knife. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1 - Figure 5 This application is described in further detail.

[0027] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0028] The embodiment of the present application discloses a mechanical part injection mold for cutting a gate, comprising an injection lower mold 1, a push block 2 is slidably connected to the top of the injection lower mold 1, the bottom end of the push block 2 extends to the inside of the injection lower mold 1 and is fixedly connected to a connecting rod 3, a connecting portion of the connecting rod 3 and the injection lower mold 1 is fixedly connected to a working spring 4, one end of the connecting rod 3 is fixedly connected to a telescopic slider 5 slidably connected to the inner wall of the injection lower mold 1, a lifting slider 6 is embedded in the top of the telescopic slider 5, a limiting strip 7 is provided at the connecting portion of the lifting slider 6 and the telescopic slider 5, the top of the lifting slider 6 extends to the top of the injection lower mold 1 and is fixedly connected to a working cutter 8, an injection plastic 9 is penetrated inside the working cutter 8, and an injection molded part 10 is fixedly connected to one end of the injection plastic 9;

[0029] The injection molding component is located outside the lower injection mold 1 and is used to perform injection molding operations on the injection molded part 10 .

[0030] Based on the above structure, the movement of the push block 2 drives the connecting rod 3 to overcome the elastic force of the working spring 4, and the movement of the connecting rod 3 drives the telescopic slider 5 to slide along the inner wall of the injection lower mold 1. The telescopic slider 5 slides through the limit strip 7 to drive the lifting slider 6 to slide vertically. The sliding of the lifting slider 6 drives the working cutter 8 and the injection plastic 9 to move relative to each other, and the injection plastic 9 is cut to separate the injection plastic 9 from the injection molded part 10, thereby greatly reducing the time for the staff to trim the injection molded part 10.

[0031] In one embodiment, the connection portion between the telescopic slider 5 and the lifting slider 6 is inclined.

[0032] In this embodiment, by setting the connection part of the telescopic slider 5 and the lifting slider 6 to be inclined, it is beneficial for the telescopic slider 5 to slide through the limit bar 7 to drive the lifting slider 6 to slide vertically, thereby realizing the control operation of the vertical sliding of the lifting slider 6.

[0033] In one embodiment, the cross section of the limiting strip 7 is in a "T" shape.

[0034] In this embodiment, by providing a limiting strip 7 with a “T”-shaped cross section, it is beneficial to improve the stability of the connection between the telescopic slider 5 and the lifting slider 6.

[0035] In one embodiment, the working cutter 8 is annular in shape, and the working cutter 8 forms a telescopic structure with the lower injection mold 1 through the telescopic slider 5 and the lifting slider 6.

[0036] In this embodiment, the lifting slider 6 slides to drive the working cutter 8 and the injection plastic 9 to move relative to each other, cutting the injection plastic 9 to separate the injection plastic 9 from the injection molded part 10 , thereby greatly reducing the time for workers to trim the injection molded part 10 .

[0037] In one embodiment, the injection molding assembly includes:

[0038] The limiting column 11, the outer wall of the injection lower mold 1 passes through the limiting column 11, the bottom end of the limiting column 11 is fixedly connected with a base 12, the top of the base 12 is fixedly connected with an ejector seat 13, the top of the ejector seat 13 is fixedly connected with an ejector body 14 that fits with the bottom end of the injection molded part 10, the connecting part between the ejector seat 13 and the injection lower mold 1 is fixedly connected with an ejector spring 15, the top of the injection lower mold 1 is fitted with an injection upper mold 16 that is slidably connected to the outer wall of the limiting column 11, the top of the injection upper mold 16 is fixedly connected with an upper mold cover 17, the top of the upper mold cover 17 is fixedly connected with a gate body 18, the bottom end of the gate body 18 is threadedly connected with a cutting piece 19, and the outer wall of the cutting piece 19 is fixedly connected with a cutting knife 20 that fits with the injection plastic 9.

[0039] In this embodiment, the injection upper mold 16 slides along the outer wall of the limiting column 11 and moves away from the injection lower mold 1. The movement of the injection upper mold 16 drives the gate body 18 to move synchronously. The gate body 18 drives the cutting knife 20 on the outer wall of the cutting piece 19 to move relative to the injection plastic 9. The injection plastic 9 is cut by the spiral cutting knife 20 to prevent the injection plastic 9 from clogging the gate body 18 after hardening.

[0040] In one embodiment, two groups of cutting blades 20 are provided, and the two groups of cutting blades 20 are centrally symmetrical about the cutting piece 19 .

[0041] In this embodiment, the gate body 18 drives the cutting blade 20 on the outer wall of the cutting piece 19 to move relative to the injection plastic 9, thereby realizing the control operation of the relative movement of the cutting blade 20 and the injection plastic 9.

[0042] In one embodiment, the cutting blade 20 has a spiral shape.

[0043] In this embodiment, the injection plastic 9 is cut by a spiral cutting blade 20 to prevent the injection plastic 9 from clogging the gate body 18 after hardening.

[0044] When the mechanical part injection mold with mechanical gate cut in this embodiment is used, first, the staff fits the injection upper mold 16 with the injection lower mold 1, and then injects the injection material 9 through the gate body 18 between the injection upper mold 16 and the injection lower mold 1 to form an injection molded part 10.

[0045] Next, the injection upper mold 16 and the injection lower mold 1 are separated so that the injection upper mold 16 slides along the outer wall of the limiting column 11 and moves away from the injection lower mold 1. The movement of the injection upper mold 16 drives the gate body 18 to move synchronously. The gate body 18 drives the cutting knife 20 on the outer wall of the cutting piece 19 to move relative to the injection plastic 9. The injection plastic 9 is cut by the spiral cutting knife 20 to prevent the injection plastic 9 from clogging the gate body 18 after hardening.

[0046] Finally, the staff pushes the push block 2, and the movement of the push block 2 drives the connecting rod 3 to overcome the elastic force of the working spring 4, and the movement of the connecting rod 3 drives the telescopic slider 5 to slide along the inner wall of the injection lower mold 1, and the telescopic slider 5 slides through the limit strip 7 to drive the lifting slider 6 to slide vertically, and the sliding of the lifting slider 6 drives the working cutter 8 and the injection plastic 9 to move relative to each other, and the injection plastic 9 is cut to separate the injection plastic 9 from the injection molded part 10, which greatly reduces the staff's trimming time for the injection molded part 10.

[0047] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A mechanical part injection mold with a mechanical gate cut, characterized in that: include: An injection molding lower mold (1), wherein the top end of the injection molding lower mold (1) is slidably connected to a push block (2), the bottom end of the push block (2) extends to the inside of the injection molding lower mold (1) and is fixedly connected to a connecting rod (3), the connection portion between the connecting rod (3) and the injection molding lower mold (1) is fixedly connected to a working spring (4), one end of the connecting rod (3) is fixedly connected to a telescopic slider (5) slidably connected to the inner wall of the injection molding lower mold (1), the top end of the telescopic slider (5) is embedded with a lifting slider (6), the connection portion between the lifting slider (6) and the telescopic slider (5) is provided with a limit strip (7), the top end of the lifting slider (6) extends to the top of the injection molding lower mold (1) and is fixedly connected to a working cutter (8), the inside of the working cutter (8) is penetrated by an injection plastic (9), and one end of the injection plastic (9) is fixedly connected to an injection molded part (10); An injection molding component is located outside the lower injection mold (1) and is used to perform an injection molding operation on the injection molded part (10).

2. The mechanical part injection mold with mechanical gate cutting according to claim 1 is characterized in that: The connection portion between the telescopic slider (5) and the lifting slider (6) is inclined.

3. The mechanical part injection mold with mechanical gate cutting according to claim 1 is characterized in that: The cross section of the limiting strip (7) is in a "T" shape.

4. The mechanical part injection mold with mechanical gate cutting according to claim 1 is characterized in that: The working cutter (8) has a ring-shaped appearance, and the working cutter (8) forms a telescopic structure with the lower injection mold (1) through a telescopic slider (5) and a lifting slider (6).

5. The mechanical part injection mold with mechanical gate cutting according to claim 1 is characterized in that: The injection molding component comprises: A limiting column (11), the outer wall of the lower injection mold (1) passes through the limiting column (11), the bottom end of the limiting column (11) is fixedly connected to a base (12), the top end of the base (12) is fixedly connected to an ejector seat (13), the top end of the ejector seat (13) is fixedly connected to an ejector body (14) that fits the bottom end of the injection molded part (10), and the connection portion between the ejector seat (13) and the lower injection mold (1) is fixedly connected to an ejector spring (15) The top of the injection molding lower mold (1) is fitted with an injection molding upper mold (16) slidably connected to the outer wall of the limiting column (11), the top of the injection molding upper mold (16) is fixedly connected to an upper mold cover (17), the top of the upper mold cover (17) is fixedly connected to a gate body (18), the bottom of the gate body (18) is threadedly connected to a cutting piece (19), and the outer wall of the cutting piece (19) is fixedly connected to a cutting knife (20) fitted to the injection molding material (9).

6. The mechanical part injection mold with mechanical gate cutting according to claim 5 is characterized in that: The cutting blades (20) are provided in two groups, and the two groups of cutting blades (20) are centrally symmetrical with respect to the cutting piece (19).

7. The mechanical part injection mold with mechanical gate cutting according to claim 5, characterized in that: The cutting blade (20) has a spiral shape.

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