An inclined stripper device

Abstract

The utility model discloses a kind of oblique stripping devices, including front mould and back mould;The back mould is driven to move by the injection molding machine;The front mould and the back mould form cavity after mould closing;The top of the front mould is provided with forming mold opening mechanism, the top of the forming mold opening mechanism is fixed on the injection molding machine, the forming mold opening mechanism at least includes a oblique rod being arranged obliquely and extending to the cavity in the front mould, the inner wall of the oblique rod is always close to the hole wall of the front mould, the outer wall of the oblique rod is formed with the protruding block matched with product.The utility model has the beneficial effects of: by forming mold opening mechanism drive oblique rod moves, and then drive back mould moves, realize mold opening action;And gradually stripping in mold opening process, shorten stripping duration, improve work efficiency;And the oblique rod and back mould synchronous movement in mold opening and mould closing process, control simple and efficient and high stability;Stripping process does not need to pass through external equipment, reduce the cost and volume of overall device.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, and in particular relates to a slanted demolding device. Background Technology

[0002] In the field of injection molding, the demolding process for products with internal undercut structures often presents significant challenges. Traditional demolding methods (such as ejector pin demolding and slider demolding) are often ineffective in achieving complete demolding of internal undercut structures, which can easily lead to product deformation, tearing, or even damage, affecting production efficiency and product quality.

[0003] Existing patent CN210477644U, "A Plastic Injection Mold with an Internal Buckle," proposes a method of connecting a slanted ejector rod (i.e., the slanted rod in this application) to the mold top plate, and using an external lifting device to drive the slanted ejector rod to achieve demolding of the internal buckle structure. However, this solution has the following drawbacks:

[0004] 1. Reliance on external drive devices: The inclined ejector rod needs to cooperate with the lifting mechanism outside the mold, which increases the overall size of the equipment, makes the structure more complex, and increases the manufacturing cost and maintenance difficulty of the mold.

[0005] 2. Long drive stroke and low efficiency: Since the inclined ejector needs to transmit power through the external top plate, the response speed of the demolding action is slow, the demolding cycle is extended, and the production efficiency is affected.

[0006] 3. Insufficient stability and precision: Transmission errors in the external drive mechanism may cause deviations in the trajectory of the inclined ejector pin, affecting demolding quality and even causing product damage or mold wear.

[0007] Therefore, there is an urgent need for a compact, efficient, and stable inclined ejector demolding structure to optimize the demolding process of internally undercut products and improve production efficiency and product yield. Utility Model Content

[0008] The purpose of this invention is to solve the above-mentioned problems existing in the prior art and to provide a slanted demolding device.

[0009] The objective of this utility model is achieved through the following technical solution:

[0010] A slanted demolding device, mounted on an injection molding machine, includes a front mold and a rear mold. The rear mold is driven to move by the injection molding machine. After the front mold and the rear mold are closed, a cavity is formed. A molding and opening mechanism is provided above the front mold, the top end of which is fixed to the injection molding machine. The molding and opening mechanism includes at least one inclined rod that extends through the front mold into the cavity. The inner wall of the inclined rod is always in close contact with the hole wall of the front mold, and the outer wall of the inclined rod has a protrusion that matches the product. In the closed state, the bottom of the inclined rod is flush with the bottom of the front mold and abuts against the rear mold. In the half-open state, the bottom of the inclined rod is located below the front mold and abuts against the rear mold. In the fully open state, the injection molding machine drives the rear mold to move away from the front mold until the product is completely separated from the front mold. In the reset state, the injection molding machine drives the rear mold to move towards the front mold and moves the molding and opening mechanism synchronously until the front mold and the rear mold are closed.

[0011] Preferably, the molding and mold opening mechanism further includes at least one guide shaft, a pressure block and a spring sleeved on the outer periphery of the guide shaft; the first end of the guide shaft is fixedly connected to the injection molding machine, and the last end abuts against the upper surface of the rear mold; the two ends of the spring are respectively fixed to the injection molding machine and the pressure block; the top end of the inclined rod is pivotally connected to the pressure block, and the bottom end of the inclined rod penetrates the pressure block.

[0012] Preferably, the pressure block includes a screwed upper pressure block and a lower pressure block; both the upper pressure block and the lower pressure block have a limiting groove formed on them, and the width of the limiting groove on the upper pressure block is equivalent to the width of the inclined rod and smaller than the width of the limiting groove on the lower pressure block; the width of the limiting groove on the lower pressure block is equivalent to the width of the pivot penetrating the top of the inclined rod.

[0013] Preferably, a limiting hole is also formed on the lower pressure block, and the length of the limiting hole is greater than the thickness of the inclined rod; the inclined rod moves within the limiting hole during the mold opening or closing process.

[0014] Preferably, there are two guide shafts symmetrically arranged on the pressure block; each guide shaft is provided with a spring.

[0015] Preferably, the front mold has at least one mating concave-convex structure formed on the parting surface of the rear mold.

[0016] Preferably, at least one through hole is formed on the side wall of the rear mold, and the through hole is convex; each through hole corresponds to an insert that passes through the through hole, and the end of the insert extends into the cavity and abuts against the product contour.

[0017] The advantages of this utility model's technical solution are mainly reflected in:

[0018] The mold-opening mechanism drives the inclined rod to move, which in turn drives the rear mold to move, thus realizing the mold opening action. During the mold opening process, the mold is gradually demolded, shortening the demolding time and improving work efficiency. Moreover, the inclined rod and the rear mold move synchronously during the mold opening and closing process, making the control simple, efficient and highly stable. The demolding process does not require external equipment, reducing the cost and size of the overall device.

[0019] The injection molding machine, combined with the reaction force of the spring, drives the inclined rod to move to realize the opening action of the front mold and the rear mold. The structure is simple and compact, reducing the footprint of the overall device.

[0020] By inserting the insert into the product, the local wall thickness of the product is reduced, making the local wall thickness equivalent to the overall wall thickness of the product. This results in more uniform heating of the product during the molding process, avoiding hollow interiors and / or uneven outer walls after molding, and improving the yield rate of the molded products. Attached Figure Description

[0021] Figure 1 : A perspective view of a preferred embodiment of the present invention;

[0022] Figure 2 : A cross-sectional view of the mold-closed state of a preferred embodiment of this utility model;

[0023] Figure 3 : Cross-sectional view of the preferred embodiment of this utility model in the semi-open mold state;

[0024] Figure 4 : Cross-sectional view of the preferred embodiment of this utility model in the fully open mold state. Detailed Implementation

[0025] The purpose, advantages, and features of this utility model will be illustrated and explained through the following non-limiting description of preferred embodiments. These embodiments are merely typical examples of applying the technical solutions of this utility model, and all technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by this utility model.

[0026] In the description of the solution, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience and simplification of description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Also, in the description of the solution, with the operator as a reference, the direction closer to the operator is the proximal end, and the direction farther from the operator is the distal end.

[0027] This utility model discloses a slanted demolding device, installed on an injection molding machine. Since the specific structure of the injection molding machine is known technology and not the focus of this utility model, it will not be described in detail here. The specific slanted demolding device includes, for example: Figure 1 The front mold 1 and rear mold 2 are shown. The rear mold 2 is driven to move by the injection molding machine. The front mold 1 and the rear mold 2 form a cavity after being closed. The front mold 1 has at least one mating concave-convex structure 12 formed on the parting surface of the rear mold 2. The concave-convex structure 12 can quickly determine the assembly direction of the two and enhance the sealing performance of the mold after it is closed.

[0028] Furthermore, at least one through hole 20 is formed on the side wall of the rear mold 2, and preferably, the through hole 20 is designed to be convex. Each through hole 20 corresponds to an insert that penetrates the through hole, and the end of the insert extends into the cavity and abuts against the product contour. Even further, the end of the insert is preferably convex, so that the molded product has a matching groove structure. By extending the insert into the product, the local wall thickness of the product is reduced, making the local wall thickness comparable to the overall wall thickness of the product. This results in more uniform heating of the product during the molding process, avoiding hollow interiors and / or uneven outer walls after molding, and improving the yield rate of the molded product.

[0029] like Figure 1 As shown, a molding and mold opening mechanism 3 is provided above the front mold 1, and the top end of the molding and mold opening mechanism 3 is fixed to the injection molding machine. The molding and mold opening mechanism 3 includes at least one inclined rod 31 that is inclined and extends through the front mold 1 into the cavity. The inner wall of the inclined rod 31 is always in close contact with the hole wall of the front mold 1, that is, an inclined hole is formed on the front mold 1, and the size of the inclined hole is equivalent to the size of the inclined rod 1. The outer wall of the inclined rod 31 is formed with a protrusion that matches the product; further, the protrusion includes an upper protrusion and a lower protrusion, which are directly transitioned by a rounded arc, and the outer surface of the upper protrusion is inclined to facilitate demolding. A groove that matches the inner wall of the product is formed on the lower protrusion.

[0030] Specifically, such as Figures 2 to 4As shown, the molding and mold opening mechanism 3 further includes at least one guide shaft 32, a pressure block 33 and a spring 30 sleeved on the outer periphery of the guide shaft 32. The first end of the guide shaft 32 is fixedly connected to the injection molding machine, and the second end abuts against the upper surface of the rear mold 2. In this utility model, two guide shafts 32 are preferably provided and symmetrically arranged on the pressure block 33; and each guide shaft 32 is provided with a spring 30. The two ends of the spring 30 are respectively fixed to the injection molding machine and the pressure block 33. The top end of the inclined rod 31 is pivotally connected to the pressure block 33, and the bottom end of the inclined rod 31 penetrates the pressure block 33. The spring 30 drives the inclined rod 31 to move to realize the mold opening action of the front mold 1 and the rear mold 2. The structure is simple and compact, reducing the footprint of the overall device.

[0031] Furthermore, the pressure block 33 includes a screw-connected upper pressure block 331 and a lower pressure block 332. Both the upper pressure block 331 and the lower pressure block 332 have limiting grooves 330 formed on them. The width of the limiting groove 330 on the upper pressure block 331 is approximately equal to the width of the inclined rod 31 and smaller than the width of the limiting groove 330 on the lower pressure block 332. The width of the limiting groove 330 on the lower pressure block 332 is approximately equal to the width of the pivot penetrating the top of the inclined rod 31. Furthermore, the lower pressure block 332 also has a limiting hole, the length of which is greater than the thickness of the inclined rod 31. During mold opening or closing, the inclined rod 31 moves within the limiting hole. The pressure block 33 is configured as separate parts for quick installation.

[0032] like Figure 2 As shown, in the mold-closed state, the bottom of the inclined rod 31 is flush with the bottom of the front mold 1 and abuts against the rear mold 2; at this time, the spring 30 is in a compressed state. Figure 3 As shown, in the semi-open mold state, the injection molding machine releases pressure, while the spring 30 releases pressure and applies force to the pressure block 33, thereby causing the pressure block 33 to drive the inclined rod 31 to move synchronously; at this time, the bottom of the inclined rod 31 is located below the front mold 1 and abuts against the rear mold 2. Figure 4 As shown, in the fully open mold state, the injection molding machine drives the rear mold 2 to move away from the front mold 1 until the product is completely separated from the front mold 1. In the reset state, the injection molding machine drives the rear mold 2 to move towards the front mold 1, and drives the molding and opening mechanism 3 to move synchronously until the front mold 1 and the rear mold 2 are closed, and the spring 30 returns to the compressed state.

[0033] This utility model has many other embodiments. All technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A slanted demolding device, disposed on an injection molding machine, comprising a front mold (1) and a rear mold (2); wherein the rear mold (2) is driven to move by the injection molding machine; characterized in that: After the front mold (1) and the rear mold (2) are closed, a cavity is formed; a molding and mold opening mechanism (3) is provided above the front mold (1), the top of the molding and mold opening mechanism (3) is fixed on the injection molding machine, the molding and mold opening mechanism (3) includes at least one inclined rod (31) that is inclined and extends through the front mold (1) into the cavity, the inner wall of the inclined rod (31) is always in close contact with the hole wall of the front mold (1), and the outer wall of the inclined rod (31) is formed with a protrusion that matches the product; in the closed state, the bottom of the inclined rod (31) is flush with the bottom of the front mold (1) and abuts against the rear mold (2); In the semi-open state, the bottom of the inclined rod (31) is located below the front mold (1) and abuts against the rear mold (2); in the fully open state, the injection molding machine drives the rear mold (2) to move away from the front mold (1) until the product is completely separated from the front mold (1); in the reset state, the injection molding machine drives the rear mold (2) to move towards the front mold (1) and drives the molding and opening mechanism (3) to move synchronously until the front mold (1) and the rear mold (2) close together.

2. The inclined demolding device according to claim 1, characterized in that: The molding and mold opening mechanism (3) further includes at least one guide shaft (32), a pressure block (33) and a spring (30) sleeved on the outer periphery of the guide shaft (32); the first end of the guide shaft (32) is fixedly connected to the injection molding machine, and the end end abuts against the upper surface of the rear mold (2); the two ends of the spring (30) are respectively fixed to the injection molding machine and the pressure block (33); the top end of the inclined rod (31) is pivotally connected to the pressure block (33), and the bottom end of the inclined rod (31) penetrates the pressure block (33).

3. The inclined demolding device according to claim 2, characterized in that: The pressure block (33) includes a screwed upper pressure block (331) and a lower pressure block (332); both the upper pressure block (331) and the lower pressure block (332) have a limiting groove (330), and the width of the limiting groove (330) on the upper pressure block (331) is equivalent to the width of the inclined rod (31) and smaller than the width of the limiting groove (330) on the lower pressure block (332); the width of the limiting groove (330) on the lower pressure block (332) is equivalent to the width of the pivot penetrating the top of the inclined rod (31).

4. The inclined demolding device according to claim 3, characterized in that: A limiting hole is also formed on the lower pressure block (332), the length of which is greater than the thickness of the inclined rod (31); the inclined rod (31) moves within the limiting hole during the mold opening or closing process.

5. The inclined demolding device according to claim 2, characterized in that: There are two guide shafts (32) symmetrically arranged on the pressure block (33); each guide shaft (32) is provided with a spring (30).

6. The inclined demolding device according to claim 1, characterized in that: The front mold (1) has at least one mutually cooperating concave-convex structure (12) formed on the parting surface of the rear mold (2).

7. The inclined demolding device according to claim 1, characterized in that: At least one through hole (20) is formed on the side wall of the rear mold (2), and the through hole (20) is convex; each through hole (20) corresponds to an insert that passes through the through hole, and the end of the insert extends into the cavity and abuts against the product contour.

Images