In-mold automatic sprue cutting structure

Abstract

The utility model provides an in-mold automatic sprue cutting structure and belongs to the technical field of molds. The problem that sprue cutting of an existing mold is troublesome is solved. A runner, a plurality of cavities and a containing cavity are formed in the mold, the runner is communicated with all the cavities, the sprue cutting structure comprises a mounting plate located in the containing cavity, a plurality of cutters fixedly connected to the mounting plate and a driver arranged outside the mold, and through holes are formed in the communicating positions of the runner and all the cavities. And the driver drives the mounting plate to move, so that the cutter penetrates out of the through hole or retracts into the through hole. The in-mold automatic sprue cutting structure has the advantage of improving the sprue cutting efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to an automatic gate cutting structure in a mold. Background Art

[0002] Injection molding is a method of producing industrial products. Products usually use rubber injection molding and plastic injection molding. Injection molding machines are the main molding equipment that use plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. Injection molding is achieved through injection molding machines and molds.

[0003] The injection molding machine passes thermoplastics or thermosetting plastics into the mold through the gate. When the plastic product is formed in the mold, the thermoplastics or thermosetting plastics at the gate will also solidify, and after solidification, they will be connected to the plastic product. Then the product and the gate are removed from the mold as a whole through the blanking structure. In order to obtain the plastic product, the gate needs to be cut off. The existing gate cutting method is usually done manually by operators. Manual gate cutting requires a lot of manpower and material resources, and the production cost is high. Manual gate cutting is affected by the operator's proficiency and fatigue, and the production efficiency is low. In addition, manual gate cutting also has problems such as uneven cutting and even cutting plastic products by mistake, resulting in reduced product quality. Summary of the invention

[0004] The utility model aims to solve the above problems existing in the prior art and proposes an in-mold automatic gate cutting structure, and solves the technical problem of how to improve the efficiency of gate cutting.

[0005] The purpose of the utility model can be achieved through the following technical solutions: an automatic in-mold gate cutting structure, the mold has a runner, a plurality of cavities and a receiving cavity, the runner is connected to all the cavities, and is characterized in that the gate cutting structure includes a mounting plate located in the receiving cavity, a plurality of cutters fixedly connected to the mounting plate and a driver arranged outside the mold, the connection between the runner and all the cavities has a through hole, and the driver drives the mounting plate to move so that the cutter passes through the through hole or retracts into the through hole.

[0006] During processing, the molten rubber is injected into the cavity through the runner. After the molten rubber cools and solidifies, the driver works to drive the mounting plate to move so that the cutter passes through the through hole. Since the through hole is located between the connecting part of the runner and the cavity, the cutter passes through the through hole to cut off the gate, and all the gates can be cut off at one time, thereby improving the efficiency of cutting the gate. After the gate is cut off, the driver drives the mounting plate to move so that the cutter retracts into the through hole.

[0007] In the above-mentioned in-mold automatic gate cutting structure, the through hole is located between the runner and the corresponding cavity, so that the space is reasonably utilized so that the cutter can better cut off the gate.

[0008] In the above-mentioned in-mold automatic gate cutting structure, all the cavities are divided into two groups, and the two groups of cavities are symmetrically arranged at the edges of both sides of the mold. There is a distance between two adjacent cavities in the same group, and there is a part of the flow channel and a pair of through holes between two adjacent cavities in the same group. Reasonable use of space allows the product to be unloaded from both sides of the mold after the gate is cut off, making it convenient to unload the product.

[0009] In the above-mentioned in-mold automatic gate cutting structure, the flow channel is located between the two groups of cavities. Reasonable use of space allows the molten rubber to flow more evenly to each cavity, making the product cooling time as consistent as possible and improving product quality.

[0010] In the above-mentioned in-mold automatic gate cutting structure, the two ends of the mounting plate are respectively protruded outside the two ends of the mold. This structure allows the driver to be better fixedly connected to the mounting plate, so that the position of the driver can be arranged more reasonably.

[0011] In the above-mentioned in-mold automatic gate cutting structure, the mold is also provided with a guide rod, the guide rod passes through the mounting plate, and the mounting plate moves along the guide rod. The setting of the guide rod improves the moving accuracy of the mounting plate, so that the cutter can cut the gate more accurately.

[0012] Compared with the prior art, the in-mold automatic gate cutting structure provided by the utility model has the following advantages:

[0013] 1. The automatic gate cutting structure installs multiple cutters on a mounting plate. By moving the mounting plate once, multiple cutters can cut the gate, thereby improving the efficiency of gate cutting.

[0014] 2. This mold arranges the positions of cavity, through hole and flow channel reasonably and makes rational use of space. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the internal structure of this mold.

[0016] Figure 2 It is a cross-sectional view of this mold.

[0017] Figure 3 This is a schematic diagram of the positions of the mold cavity, through holes and runners.

[0018] In the figure, 1, flow channel; 2, cavity; 3, accommodating cavity; 4, mounting plate; 5, cutter; 6, driver; 7, through hole; 8, guide rod. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] like Figure 1 , Figure 2 As shown, the mold has a runner 1, a cavity 2, a receiving cavity 3 and an in-mold automatic gate cutting structure, and the automatic gate cutting structure includes a mounting plate 4, a cutter 5, a driver 6, a through hole 7 and a guide rod 8.

[0021] All cavities 2 are divided into two groups, and the two groups of cavities 2 are symmetrically arranged at the edges of both sides of the mold, and the runner 1 is located between the two groups of cavities 2. There is a distance between two adjacent cavities 2 in the same group, such as Figure 3 As shown, there is a partial flow channel 1 and a pair of through holes 7 between two adjacent cavities 2 in the same group, and the connection between the flow channel 1 and all the cavities 2 has a penetrating through hole 7. The through hole 7 is located between the flow channel 1 and the corresponding cavity 2, and the flow channel 1 is connected to all the cavities 2.

[0022] The mounting plate 4 is located in the accommodating cavity 3, the guide rod 8 passes through the mounting plate 4, the mounting plate 4 moves along the guide rod 8, the two ends of the mounting plate 4 are respectively protruded outside the two ends of the mold, and the driver 6 is arranged outside the mold. In this embodiment, the driver 6 is a cylinder, and the output shaft of the driver 6 is fixedly connected to the end of the mounting plate 4. Eight cutters 5 are fixedly connected to the mounting plate 4. In actual production, the driver 6 can be an oil cylinder, and the number of the cutters 5 can be four or fourteen.

[0023] During processing, the molten rubber is injected into the cavity 2 through the runner 1. After the molten rubber is cooled and solidified, the driver 6 works to drive the mounting plate 4 to move so that the cutter 5 passes through the through hole 7. The cutter 5 passes through the through hole 7 to cut off the gate. Subsequently, the driver 6 drives the mounting plate 4 to move so that the cutter 5 retracts into the through hole 7, completing an automatic gate cutting.

[0024] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0025] Although the terms such as flow channel 1, cavity 2, accommodating cavity 3, mounting plate 4, cutter 5, driver 6, through hole 7, guide rod 8 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. An in-mold automatic gate cutting structure, wherein the mold has a flow channel (1), a plurality of cavities (2) and a receiving cavity (3), wherein the flow channel (1) is connected to all of the cavities (2), It is characterized in that The gate cutting structure comprises a mounting plate (4) located in the accommodating cavity (3), a plurality of cutters (5) fixedly connected to the mounting plate (4), and a driver (6) arranged outside the mold. The connection points between the flow channel (1) and all the cavities (2) are provided with through holes (7). The driver (6) drives the mounting plate (4) to move so that the cutters (5) pass through the through holes (7) or retract into the through holes (7).

2. According to claim 1, an in-mold automatic gate cutting structure, It is characterized in that The through hole (7) is located between the flow channel (1) and the corresponding cavity (2).

3. An in-mold automatic gate cutting structure according to claim 1 or 2, It is characterized in that All of the cavities (2) are divided into two groups. The two groups of cavities (2) are symmetrically arranged at the edges of both sides of the mold. There is a distance between two adjacent cavities (2) in the same group. There is a part of the flow channel (1) and a pair of through holes (7) between two adjacent cavities (2) in the same group.

4. The in-mold automatic gate cutting structure according to claim 3, It is characterized in that The flow channel (1) is located between the two groups of cavities (2).

5. An in-mold automatic gate cutting structure according to claim 1 or 2, It is characterized in that The two ends of the mounting plate (4) are respectively protruded outside the two ends of the mold.

6. An in-mold automatic gate cutting structure according to claim 1 or 2, It is characterized in that The mold also has a guide rod (8), which passes through the mounting plate (4), and the mounting plate (4) moves along the guide rod (8).

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