Demolding mechanism of injection mold

Abstract

The utility model discloses a demoulding mechanism of an injection mould, the injection mould comprises an upper mould and a lower mould, the bottom of the upper mould is provided with an upper mould cavity, and the top of the lower mould is provided with a lower mould cavity; the demolding mechanism comprises a vertical rack, a horizontal transmission rod, a vertical transmission rod and a core pulling piece; the vertical rack is fixedly connected to the bottom of the upper die; a mounting groove is formed in the top of the lower die, the horizontal transmission rod and the vertical transmission rod are rotationally connected into the mounting groove, a circular gear and a first bevel gear are arranged on the horizontal transmission rod, the circular gear is meshed with the vertical rack, a second bevel gear and a rotating disc are arranged on the vertical transmission rod, the second bevel gear is meshed with the first bevel gear, and the rotating disc is meshed with the first bevel gear. And the core pulling piece is of an arc rod-shaped structure, is connected with the rotating disc, penetrates through the groove wall of the mounting groove and extends into the lower mold cavity. According to the demolding mechanism of the injection mold, demolding is carried out through opening and closing actions of the mold, demolding work can be achieved without an oil cylinder or a motor, and the use and maintenance cost is low.

Description

Technical Field

[0001] The utility model relates to a demoulding mechanism of an injection mold. Background Art

[0002] Injection molds are widely used in the plastic product processing industry to utilize the extrudability and moldability of plastics to make molten plastic injected by an injection molding machine into plastic products with certain shapes and sizes. Among them, the injection mold usually includes a movable mold plate and a fixed mold plate. When the movable mold plate and the fixed mold plate are closed, a mold cavity for molding plastic products can be formed between them, and the obtained plastic products can be taken out when the mold is opened. In the prior art, the core pulling parts are usually pulled out from the obtained plastic products with the help of a cylinder or a motor to achieve demolding. However, the demolding mechanism in the prior art has the following problems: the high temperature of the movable and fixed mold plates is transferred to the cylinder or the motor, resulting in a high temperature, which is easy to cause damage to the cylinder or the motor. If an additional heat insulation design is performed inside the mold, the manufacturing cost will be high and subsequent maintenance will be more difficult. Summary of the invention

[0003] The utility model aims to provide a demoulding mechanism for an injection mold, which has a reasonable structure and can demould by opening and closing the mold, and can realize the demoulding work without using a cylinder or a motor, and has low use and maintenance costs.

[0004] To achieve the above-mentioned purpose, the technical solution of the utility model is to design a demoulding mechanism of an injection mold, wherein the injection mold comprises an upper mold and a lower mold, an upper mold cavity is provided at the bottom of the upper mold, and a lower mold cavity is provided at the top of the lower mold; the demoulding mechanism comprises a vertical rack, a horizontal transmission rod, a vertical transmission rod and a core pulling member;

[0005] The vertical rack is fixedly connected to the bottom of the upper mold;

[0006] The top of the lower mold is provided with a mounting groove located on one side of the lower model cavity, one end of the horizontal transmission rod is rotatably connected to the groove wall of the mounting groove, the other end of the horizontal transmission rod is provided with a first bevel gear, and the horizontal transmission rod is provided with a circular gear meshing with the vertical rack, the bottom end of the vertical transmission rod is rotatably connected to the groove bottom of the mounting groove, the top of the vertical transmission rod is provided with a second bevel gear meshing with the first bevel gear, and the vertical transmission rod is provided with a turntable, and a convex plate is provided on the outer circumferential surface of the turntable, the core pulling part is an arc rod-shaped structure, one end of the core pulling part is fixedly connected to the convex plate, and the other end of the core pulling part passes through the groove wall of the mounting groove and extends into the lower model cavity.

[0007] Preferably, a groove bottom of the mounting groove is provided with an avoidance hole for avoiding the vertical rack.

[0008] Preferably, a circular arc channel for the core pulling piece to pass through is provided on the groove wall of the installation groove, and a circular arc guide sleeve sleeved on the core pulling piece is fixed in the circular arc channel.

[0009] Preferably, the curvature of the circular arc guide sleeve matches the curvature of the core pulling member.

[0010] Preferably, four positioning columns arranged in a rectangular shape are provided at the bottom of the upper mold, and four positioning holes corresponding to the positioning columns one by one are provided at the top of the lower mold.

[0011] The advantages and beneficial effects of the utility model are: providing a demoulding mechanism for an injection mold, which has a reasonable structure, and can demould by opening and closing the mold, and can realize the demoulding work without using a cylinder or a motor, and has low use and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the lower mold in the utility model. Implementation

[0013] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0014] The technical solution specifically implemented in this utility model is:

[0015] like Figure 1 As shown, a demoulding mechanism of an injection mold, the injection mold comprises an upper mold and a lower mold 1, the bottom of the upper mold is provided with an upper mold cavity, and the top of the lower mold 1 is provided with a lower mold cavity 2; the demoulding mechanism comprises a vertical rack, a horizontal transmission rod 3, a vertical transmission rod 4 and a core pulling member 5;

[0016] The vertical rack is fixedly connected to the bottom of the upper mold;

[0017] The top of the lower mold 1 is provided with a mounting groove 6 located on one side of the lower model cavity 2, one end of the horizontal transmission rod 3 is rotatably connected to the groove wall of the mounting groove 6 through a bearing, the other end of the horizontal transmission rod 3 is provided with a first bevel gear 7, and the horizontal transmission rod 3 is provided with a circular gear 8 meshing with the vertical rack, the bottom end of the vertical transmission rod 4 is rotatably connected to the groove bottom of the mounting groove 6 through a bearing, the top of the vertical transmission rod 4 is provided with a second bevel gear 9 meshing with the first bevel gear 7, and the vertical transmission rod 4 is provided with a turntable 10, and a convex plate 11 is provided on the outer peripheral surface of the turntable 10, the core pulling member 5 is an arc rod-shaped structure, one end of the core pulling member 5 is fixedly connected to the convex plate 11, and the other end of the core pulling member 5 passes through the groove wall of the mounting groove 6 and extends into the lower model cavity 2.

[0018] Furthermore, a groove bottom of the mounting groove 6 is provided with an escape hole 12 for evading the vertical rack.

[0019] Furthermore, a circular arc channel for the core-pulling member 5 to pass through is provided on the groove wall of the installation groove 6, and a circular arc guide sleeve sleeved on the core-pulling member 5 is fixed in the circular arc channel.

[0020] Furthermore, the curvature of the circular arc guide sleeve matches the curvature of the core pulling member 5 .

[0021] Furthermore, four positioning columns arranged in a rectangular shape are provided at the bottom of the upper mold, and four positioning holes 13 corresponding to the positioning columns are provided at the top of the lower mold 1 .

[0022] The working principle of the demoulding mechanism of the injection mold of the utility model is as follows: when the upper mold and the lower mold 1 are in the process of closing the mold, the upper mold will drive the vertical rack to move in the direction of the lower mold 1, and the vertical rack will drive the horizontal transmission rod 3 to rotate through the meshing with the circular gear 8, and the horizontal transmission rod 3 will drive the first bevel gear 7 to rotate, so that the first bevel gear 7 drives the vertical transmission rod 4 to rotate through the meshing with the second bevel gear 9, and the vertical transmission rod 4 will drive the turntable 10 to rotate, so that the turntable 10 drives the core puller 5 fixed thereto to rotate, and then the core puller 5 is partially moved into the lower mold cavity 2 and participates in the molding of the plastic product. When the upper mold and the lower mold 1 are in the process of opening the mold, the upper mold will drive the vertical rack to move in the direction away from the lower mold 1, and drive the core puller 5 to be pulled out of the plastic product in linkage, thereby completing the demoulding action.

[0023] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A demoulding mechanism for an injection mold, the injection mold comprising an upper mold and a lower mold, the bottom of the upper mold is provided with an upper mold cavity, the top of the lower mold is provided with a lower mold cavity, characterized in that: The demoulding mechanism comprises a vertical rack, a horizontal transmission rod, a vertical transmission rod and a core pulling member; The vertical rack is fixedly connected to the bottom of the upper mold; The top of the lower mold is provided with a mounting groove located on one side of the lower model cavity, one end of the horizontal transmission rod is rotatably connected to the groove wall of the mounting groove, the other end of the horizontal transmission rod is provided with a first bevel gear, and the horizontal transmission rod is provided with a circular gear meshing with the vertical rack, the bottom end of the vertical transmission rod is rotatably connected to the groove bottom of the mounting groove, the top of the vertical transmission rod is provided with a second bevel gear meshing with the first bevel gear, and the vertical transmission rod is provided with a turntable, and a convex plate is provided on the outer circumferential surface of the turntable, the core pulling part is an arc rod-shaped structure, one end of the core pulling part is fixedly connected to the convex plate, and the other end of the core pulling part passes through the groove wall of the mounting groove and extends into the lower model cavity.

2. The demoulding mechanism of the injection mold according to claim 1, characterized in that: The bottom of the installation groove is provided with an avoidance hole for avoiding the vertical rack.

3. The demoulding mechanism of the injection mold according to claim 1, characterized in that: A circular arc channel for the core pulling piece to pass through is arranged on the groove wall of the installation groove, and a circular arc guide sleeve sleeved on the core pulling piece is fixed in the circular arc channel.

4. The demoulding mechanism of the injection mold according to claim 3, characterized in that: The curvature of the circular arc guide sleeve matches the curvature of the core pulling member.

5. The demoulding mechanism of the injection mold according to claim 1, characterized in that: The bottom of the upper mold is provided with four positioning columns arranged in a rectangular shape, and the top of the lower mold is provided with four positioning holes corresponding to the positioning columns one by one.

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