Sliding block ejection mechanism and injection mold
By introducing the ejection structure and reset structure into the slider ejection mechanism, the problem of the slider being difficult to demould is solved, the product is safely demoulded, and the qualified rate of injection molding is improved.
Patent Information
- Application Number
- CN202422668072.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-01
AI Technical Summary
The slider mechanism in the existing injection mold is not easy to demould, which causes the product to be easily deformed or broken during the demoulding process, affecting the product qualification rate.
A slider ejection mechanism is designed, including an ejection structure, a driving structure, and a reset structure. The movement of the ejection structure between the ejection position and the initial position reduces the adhesion between the product and the slider, thereby assisting product demoulding.
It effectively prevents the product from deformation or breakage during the demoulding process and improves the success rate of product demoulding.
Smart Images
Figure CN223419980U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molds, in particular to a slider ejection mechanism and an injection mold. Background Art
[0002] Injection molds are used for product injection molding. Molten plastic is injected into the mold cavity, and after cooling, a plastic product with a shape that matches the cavity is produced. For some complex-shaped products, sliders are required to cooperate with the mold core to form a complex cavity. Some product structures are largely or completely encased in the sliders, resulting in strong adhesion between the molded product and the sliders, making demolding difficult. If forced demolding is attempted, the product risks deformation or breakage, reducing the yield rate of the injection molding process. Summary of the Invention
[0003] The purpose of the utility model is to provide a slider ejection mechanism and an injection mold to solve the problem that the slider mechanism of the existing mold is difficult to demould.
[0004] To achieve the above objectives, the technical solution of the present utility model includes:
[0005] A slider ejection mechanism includes a slider and an ejection assembly, the slider is provided with a molding surface for forming a portion of the side wall of a cavity, the ejection assembly includes an ejection structure, a driving structure and a reset structure, the ejection assembly is arranged on the slider, the ejection structure moves relative to the slider so that the ejection end of the ejection structure selectively protrudes from the molding surface of the slider, the position where the ejection end of the ejection structure protrudes from the molding surface is defined as the ejection position, and the position where the ejection end of the ejection structure is retracted to the slider is defined as the initial position, the ejection structure is connected to the driving structure and is switched to the ejection position under the action of the driving structure, and the ejection structure is also connected to the reset structure and is switched to the initial position under the action of the reset structure.
[0006] In one embodiment, the ejection structure is slidably connected to the slider and moves relative to the slider.
[0007] In one embodiment, the ejection structure is connected to the driving structure via a connecting structure, and the driving structure includes a fixed seat fixedly connected to the slider and an elastic member arranged between the fixed seat and the connecting structure. The movement direction of the ejection mechanism from the initial position to the ejection position is defined as the ejection direction. The elastic force direction of the elastic member is the same as the ejection direction or has an acute angle with the ejection direction. The elastic force of the elastic member indirectly acts on the ejection structure through the connecting structure, thereby driving the ejection structure to switch from the initial position to the ejection position.
[0008] In one embodiment, the ejection structure is a ejector rod, and the reset structure is a reset rod. The ejector rod and the reset rod are respectively connected to the connecting structure and form a linkage through the connecting structure. The end of the reset rod extends to the abutment surface of the slider for abutting with the reset drive member, so that the reset rod protrudes from the abutment surface as the ejector rod switches to the ejection position, and under the abutment action of the reset drive member, the reset rod switches from the ejection position to the initial position with the ejector rod, and the fixed seat forms a movement limit of the ejection structure against the ejection direction.
[0009] In one embodiment, the driving structure is a shovel provided on one side of the slider, the slider and the shovel form a relative sliding connection, the shovel is provided with a driving surface, and the shovel and the ejection mechanism form a relative sliding connection along the driving surface. The sliding direction of the slider relative to the shovel and the sliding direction of the ejection mechanism relative to the shovel form a certain angle, so that the ejection mechanism moves relative to the slider and switches to the ejection position as the slider slides.
[0010] In one embodiment, an elastic return member is provided between the slider and the ejection structure, and the movement direction of the ejection mechanism from the initial position to the ejection position is defined as the ejection direction. The elastic return member is provided on the side of the ejection structure facing the ejection direction, so that the elastic force of the elastic return member drives the ejection structure to move against the ejection direction and switch from the ejection position to the initial position.
[0011] In one embodiment, the slider is provided with a limiting pressure plate, and the limiting pressure plate abuts against the ejection structure on a side opposite to the ejection direction, thereby forming a movement limit of the ejection structure opposite to the ejection direction.
[0012] The technical solution of the utility model also includes:
[0013] An injection mold comprises two mold cores and the above-mentioned slider ejection mechanism. The slider ejection mechanism is arranged on one of the mold cores and cooperates with the other mold core to form a mold cavity.
[0014] The beneficial effects of the present invention are as follows: the present invention provides an ejection assembly on the slider, and by means of the movement of the ejection structure between the ejection position and the initial position, the product formed on the slider is ejected when necessary, thereby reducing the adhesion between the product and the slider and preventing the product from being deformed or broken during the demolding process. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional diagram of embodiment 1 of the present utility model.
[0016] Figure 2 It is a right side view of embodiment 1 of the present utility model.
[0017] Figure 3 yes Figure 2 AA cross-sectional view of the ejection structure in its initial position.
[0018] Figure 4 It is a cross-sectional view of Example 1 of the present utility model, wherein the ejection structure is in the ejection position.
[0019] Figure 5 It is a cross-sectional view of Example 2 of the present utility model, in which the ejection structure is in the initial position.
[0020] Figure 6 It is a cross-sectional view of Example 2 of the present utility model, in which the ejection structure is in the ejection position.
[0021] Wherein: 1 slider, 11 forming surface, 12 abutting surface, 2 ejection assembly, 21 ejection structure, 210 ejection end, 211 ejector rod, 212 ejector block, 22 driving structure, 221 fixing seat, 222 elastic member, 223 shovel, 2231 driving surface, 23 reset structure, 231 reset rod, 232 elastic reset member, 24 connecting structure, 3 limiting pressure plate, X ejection direction. DETAILED DESCRIPTION
[0022] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the disclosure of this invention and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will understand other possible implementations and the advantages of this invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.
[0023] Example 1
[0024] See Figures 1 to 4As shown, the utility model discloses a slider ejection mechanism, including a slider 1 and an ejection assembly 2. The slider 1 is provided with a molding surface 11 for forming a portion of the side wall of the cavity. The ejection assembly 2 includes an ejection structure 21, a driving structure 22 and a reset structure 23. The ejection assembly 21 is provided on the slider 1. The ejection structure 21 moves relative to the slider 1 so that the ejection end 210 of the ejection structure 21 selectively protrudes from the molding surface 11 of the slider 1. The position where the ejection end 210 of the ejection structure 21 protrudes from the molding surface 11 is defined as the ejection position. The position where the ejection end 210 of the ejection structure 21 retracts to the slider 1 is defined as the initial position. The ejection structure 21 is connected to the driving structure 22 and is switched to the ejection position under the action of the driving structure 22. The ejection structure 21 is also connected to the reset structure 23 and is switched to the initial position under the action of the reset structure 23.
[0025] The slider ejection mechanism of the present invention is used for an injection mold. The slider 1 is used to be slidably set on one of the mold cores of the injection mold, and cooperates with the mold core to form a part of the mold core. The space between the two mold cores forms the cavity of the injection mold, and the molding surface 11 of the slider 1 forms a part of the side wall of the mold cavity. The utility model provides an ejection component 2 on the slider 1, and ejects the product molded in the slider 1 when necessary by means of the movement of the ejection structure 21 between the ejection position and the initial position. When the ejection structure 21 switches to the initial position, the ejection end 210 retracts to the slider 1 and does not affect the product molded in the cavity. When the product is completed and ready for demolding, the ejection structure 21 switches to the ejection position, applying a thrust to the product to reduce the adhesion between it and the slider 1, which is beneficial to the subsequent demolding of the product and prevents the product from deforming or even breaking during demolding.
[0026] In this embodiment, the ejection structure 21 is connected to the slider 1 by relative sliding and translates relative to the slider 1. In other embodiments, the ejection structure 21 can also move relative to the slider 1 by swinging, but sliding friction is also generated between the ejection structure 21 and the slider 1. For example, the ejection mechanism 21 is configured as a rocker with the ejection end at the end of the rocker.
[0027] See Figure 3 and Figure 4As shown, the ejection mechanism 21 is connected to the driving structure 22 via a connecting structure 24. The driving structure 22 includes a fixing seat 221 fixedly connected to the slider 1 and an elastic member 222 provided between the fixing seat 221 and the connecting structure 24. The movement direction of the ejection mechanism from the initial position to the ejection position is defined as the ejection direction X. The elastic force direction of the elastic member 222 is the same as the ejection direction X. The elastic force of the elastic member 222 indirectly acts on the ejection structure 21 via the connecting structure 24, thereby driving the ejection structure 21 to switch from the initial position to the ejection position. The ejection structure 21 of this embodiment is a ejector pin 211, and the ejection end 210 is formed at the end of the ejector pin 211. The reset structure 23 is a reset rod 231. The ejector pin 211 and the reset rod 231 are respectively connected to the connecting structure 24 and form a linkage through the connecting structure 24. The end of the reset rod 231 extends to the abutment surface 12 of the slider 1 for abutting with the reset driving member, so that the reset rod 231 protrudes from the abutment surface 12 as the ejector pin 211 switches to the ejection position, and under the abutment action of the reset driving member, the ejector pin 211 is switched from the ejection position to the initial position. The fixed seat 221 forms a movement limit of the ejection structure against the ejection direction X, preventing the ejection structure 21, the reset structure 23 and the connecting mechanism 24 from excessively moving in the ejection direction X due to the elastic force of the elastic member 222. Among them, the reset driving member refers to a member that abuts against the slider and pushes the reset rod 231 to move in the direction required for reset as the distance between the reset driving member and the slider approaches. The reset driving member of this embodiment is a mold core without a slider. In other embodiments, the reset driving member can also be other structures of the mold.
[0028] The connection structure 24 is composed of two connection blocks. One end of the top rod 211 and the reset rod 231 are both arranged between the two connection blocks, thereby forming a relatively fixed connection with the connection structure 24. Figure 2 As shown, there are three reset rods 231 in this embodiment. The three reset rods 231 are arranged at intervals to form a larger and more uniform thrust on the connecting structure 24, thereby promoting the reset of the ejector rod 211.
[0029] The elastic member 222 of this embodiment is a spring. Two springs are arranged between the fixing seat 221 and the connecting structure 24. When the reset driving member moves away from the abutment surface 12 of the slider 1, the elastic force of the spring pushes out the ejection structure 21, the reset structure 23 and the connecting mechanism 24 at the same time, thereby moving the ejector rod 211 to the ejection position to assist in demoulding.
[0030] In the above embodiment, the elastic force direction of the elastic member 222 is the same as the ejection direction X. In other embodiments, it is also feasible that the elastic force direction of the elastic member 222 forms an acute angle with the ejection direction X, as long as the elastic force of the elastic member 222 has a certain component in the ejection direction X to drive the ejection mechanism 21 to switch to the ejection position.
[0031] Embodiment 2
[0032] The main same point between the present embodiment and Embodiment 1 is that the ejection structure 21 of both embodiments is relatively slidingly connected to the sliding block 1 and is in translation relative to the sliding block 1. But the driving structure 22 and the reset structure 24 for enabling the ejection structure 21 to translate are different in the present embodiment.
[0033] Referring to Figures 5 and 6 the driving structure 22 of the present embodiment is a shovel 223 arranged at one side of the sliding block 1, the sliding block 1 and the shovel 223 form a relatively sliding connection, the shovel 223 is provided with a driving surface 2231, the shovel 223 and the ejection structure 21 form a connection in relative sliding along the driving surface 2231, the sliding direction of the sliding block 1 relative to the shovel 223 forms a certain angle with the sliding direction of the ejection structure 21 relative to the shovel 223, so that the ejection structure 21 moves relative to the sliding block 1 and switches to the ejection position along with the sliding of the sliding block 1.
[0034] The ejection structure 21 of the present embodiment includes a top rod 211 and a top block 212 which are relatively fixedly connected, the top block 212 is relatively slidingly connected with the driving surface 2231 of the shovel 223, so that when the sliding block moves toward the demolding direction (i.e. the obliquely downward direction shown by the arrow in the middle of the figure), the top rod 211 and the top block 212 move relative to the sliding block 1 toward the ejection direction X. Figure 5
[0035] The reset structure 23 of the present embodiment is an elastic reset member 232 arranged between the sliding block 1 and the ejection structure 21, the elastic reset member 232 is arranged at the side of the ejection structure 21 facing the ejection direction X, so that the elastic force of the elastic reset member 232 drives the ejection structure 21 to move against the ejection direction X and switch from the ejection position to the initial position. The elastic reset member 232 of the present embodiment is a spring, one end of which abuts against the sliding block 1 and the other end of which abuts against the top block 212, so as to reset the ejection structure 21 to the initial position when it is not pressed by the shovel 223.
[0036] In order to prevent the ejection structure 21 from moving excessively when it is reset, the sliding block 1 is provided with a limiting pressing plate 3 which abuts against the ejection structure 21 at the side against the ejection direction X, so as to form a movement limiting of the ejection structure 21 against the ejection direction X.
[0037] Although the present utility model is specifically shown and introduced in combination with the preferred embodiments, those skilled in the art should understand that the remaining unexplained parts are prior art, and various changes made to the present utility model in form and details without departing from the spirit and scope of the present utility model defined by the appended claims, all fall within the protection scope of the present utility model.
Claims
1. A slider ejection mechanism, characterized in that: The present invention comprises a slider and an ejection assembly, wherein the slider is provided with a molding surface for forming a part of the side wall of the mold cavity, and the ejection assembly comprises an ejection structure, a driving structure and a reset structure. The ejection assembly is arranged on the slider, and the ejection structure moves relative to the slider so that the ejection end of the ejection structure selectively protrudes from the molding surface of the slider. The position where the ejection end of the ejection structure protrudes from the molding surface is defined as the ejection position, and the position where the ejection end of the ejection structure is retracted to the slider is defined as the initial position. The ejection structure is connected to the driving structure and is switched to the ejection position under the action of the driving structure. The ejection structure is also connected to the reset structure and is switched to the initial position under the action of the reset structure.
2. The slider ejection mechanism according to claim 1, characterized in that: The ejection structure is slidably connected to the slider and moves relative to the slider.
3. The slider ejection mechanism according to claim 2, characterized in that: The ejection structure is connected to the driving structure via a connecting structure. The driving structure includes a fixing seat fixedly connected to the slider and an elastic member arranged between the fixing seat and the connecting structure. The movement direction of the ejection mechanism from the initial position to the ejection position is defined as the ejection direction. The elastic force direction of the elastic member is the same as the ejection direction or has an acute angle with the ejection direction. The elastic force of the elastic member indirectly acts on the ejection structure through the connecting structure, thereby driving the ejection structure to switch from the initial position to the ejection position.
4. The slider ejection mechanism according to claim 3, characterized in that: The ejection structure is a push rod, and the reset structure is a reset rod. The push rod and the reset rod are respectively connected to the connecting structure and form a linkage through the connecting structure. The end of the reset rod extends to the abutment surface of the slider for abutting with the reset drive member, so that the reset rod protrudes from the abutment surface as the push rod switches to the ejection position, and under the abutment action of the reset drive member, the reset rod switches from the ejection position to the initial position with the push rod, and the fixed seat forms a movement limit of the ejection structure against the ejection direction.
5. The slider ejection mechanism according to claim 2, characterized in that: The driving structure is a shovel provided on one side of the slider, the slider and the shovel are in relative sliding connection, the shovel is provided with a driving surface, and the shovel and the ejection mechanism are in relative sliding connection along the driving surface. The sliding direction of the slider relative to the shovel and the sliding direction of the ejection mechanism relative to the shovel form a certain angle, so that the ejection mechanism moves relative to the slider and switches to the ejection position as the slider slides.
6. The slider ejection mechanism according to claim 5, characterized in that: An elastic return member is provided between the slider and the ejection structure. The movement direction of the ejection mechanism from the initial position to the ejection position is defined as the ejection direction. The elastic return member is provided on a side of the ejection structure facing the ejection direction, so that the elastic force of the elastic return member drives the ejection structure to move against the ejection direction and switch from the ejection position to the initial position.
7. The slider ejection mechanism according to claim 6, characterized in that: The slider is provided with a limiting pressure plate, and the limiting pressure plate abuts against the ejection structure on a side opposite to the ejection direction, thereby forming a movement limit of the ejection structure opposite to the ejection direction.
8. An injection mold, characterized in that: It comprises two mold cores and a slider ejection mechanism as described in any one of claims 1 to 7, wherein the slider ejection mechanism is arranged on one of the mold cores to form a part of the mold core, and the two mold cores cooperate to form a cavity.