Straight-ejection inclined core-pulling structure for demolding of product with inverted buckle
By adopting a straight-top inclined core pulling structure during the molding process of the inverted product, and using the coordination of the guide slide bar and the guide slide chute, the motion interference problem caused by the small inverted spacing is solved, and efficient inverted core pulling is achieved, which improves product accuracy and quality, and saves mold cost.
Patent Information
- Application Number
- CN202421582782.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-05
AI Technical Summary
During the mold output process with inverted products, the inverted spacing is small, and the existing inclined inverted core pulling structure is prone to motion interference, affecting the mold output efficiency, resulting in equipment damage and product accuracy and quality problems.
The straight-top inclined core pulling structure is adopted. Through the cooperation of the straight-top rod and the inclined head, the guide slider on the side wall of the inclined head and the guide groove in the mold are used to cooperate with the guide groove in the mold, so that the inclined head slides along the direction of the guide slider and the guide groove, and is decomposed into vertical and horizontal movements to achieve inverted core pulling.
It effectively solves the motion interference problem caused by small inverted spacing, and realizes normal mold output of small inverted products, reduces equipment damage and improves product accuracy and quality, while saving mold space, raw materials and processing costs.
Smart Images
Figure CN222959117U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of demolding structures, and specifically discloses a direct-top and inclined-core-pulling structure for demolding products with undercuts. Background Art
[0002] Processing by molds is a commonly used processing method in various industries at present. Generally, during the mold processing, the cavity shape formed by the closing between the upper mold and the lower mold is used to make the product form a specific shape. And during the demolding process of products with undercuts, a ejection mechanism is usually required to eject the products with undercuts. As Figure 1 shown, currently, an inclined ejector mechanism is commonly used to eject the products with undercuts, that is, the inclined ejector rod 5 is used to push the inclined ejector head 4, so that the inclined ejector head 4 moves obliquely to disengage from the undercut part of the product, thereby performing undercut core-pulling on the product with undercuts.
[0003] However, during the process of inclined ejector undercut core-pulling, when the undercut spacing on the product is small, as Figure 1 shown in part A of, movement interference is likely to occur between two inclined ejector rods and between the inclined ejector rod and its cooperating connecting components, which affects the normal progress of undercut core-pulling. At the same time, it is easy to cause damage to equipment components and affect the accuracy and quality of products. Therefore, in view of this, the inventor provides a direct-top and inclined-core-pulling structure for demolding products with undercuts to solve the above problems. Summary of the Utility Model
[0004] The purpose of the present utility model is to provide a direct-top and inclined-core-pulling structure for demolding products with undercuts, so as to perform undercut core-pulling on products with undercuts having a small undercut spacing.
[0005] To achieve the above purpose, the basic scheme of the present utility model provides a direct-top and inclined-core-pulling structure for demolding products with undercuts, including:
[0006] A direct ejector rod;
[0007] An inclined ejector head, a horizontal chute is provided at the bottom of the inclined ejector head, the top of the direct ejector rod is slidably connected in the chute, and at least one side wall of the inclined ejector head is provided with an inclined guide slide;
[0008] A guide chute, which is inclined in the mold for processing products with undercuts and is parallel to the guide slide, the number of the guide chutes corresponds to that of the guide slides, and the guide slides are slidably connected in the corresponding guide chutes.
[0009] Further, the included angle between the guide slide and the guide chute and the vertical plane is less than or equal to 20°.
[0010] Further, there are two guide slides, which are arranged on the opposite side walls of the inclined ejector head.
[0011] Furthermore, the cross-section of the sliding groove is dovetail-shaped or T-shaped.
[0012] Furthermore, an inclined end face is provided at one end of the inclined ejector pin away from the undercut of the product, and an inclined surface adapted to the inclined end face is provided in the mold for processing the product with an undercut.
[0013] Furthermore, the guiding slide bar is arranged on the inclined end face and is parallel to the inclined end face.
[0014] Furthermore, a guiding block is further included, and the straight ejector rod is vertically slidably connected to the guiding block.
[0015] The principle and effect of this solution are as follows:
[0016] Compared with the prior art, the utility model achieves the purpose of straight-top oblique core-pulling by setting a straight ejector rod and an inclined ejector pin, and through the cooperation of the guiding slide bar on the side wall of the inclined ejector pin and the guiding sliding groove in the mold for processing the product with an undercut. When the straight ejector rod vertically jacks up the inclined ejector pin, the inclined ejector pin slides along the direction of the guiding slide bar and the guiding sliding groove. The sliding in this inclined direction can be decomposed into vertical movement and horizontal movement, so that the undercut on the inclined ejector pin and the product with an undercut are disengaged from each other. That is, it can perform undercut core-pulling on the product when two (or more) undercuts are symmetrically arranged or the positions of the undercuts are staggered by a small amount and it is impossible to arrange two (or more) conventional inclined ejector structures. Moreover, the structure of straight-top oblique core-pulling does not require adjusting the angle of the straight ejector rod, nor does it require an inclined ejector seat, which saves mold space, mold raw material cost and processing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.
[0018] Figure 1 Shows a schematic diagram of an existing inclined ejector mechanism for ejecting a product with an undercut;
[0019] Figure 2 Shows an exploded view of a straight-top oblique core-pulling structure for ejecting a product with an undercut proposed in an embodiment of the present application;
[0020] Figure 3 Shows an exploded view of a partial structure of a straight-top oblique core-pulling structure for ejecting a product with an undercut proposed in an embodiment of the present application;
[0021] Figure 4Shows a schematic structural diagram of a direct-top and inclined-core-pulling structure for the demolding of products with undercuts proposed in an embodiment of the present application;
[0022] Figure 5 Shows a schematic diagram of the cooperation between the inclined core head and the product with undercuts in a direct-top and inclined-core-pulling structure for the demolding of products with undercuts proposed in an embodiment of the present application;
[0023] Figure 6 Shows a schematic diagram of a guide chute in the demolding of products with undercuts proposed in an embodiment of the present application;
[0024] Figure 7 Shows a schematic diagram of the motion state of a direct-top and inclined-core-pulling structure for the demolding of products with undercuts proposed in an embodiment of the present application. Detailed implementation manners
[0025] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present invention as follows.
[0026] The reference numerals in the accompanying drawings of the specification include: product with undercuts 1, lower mold 2, upper mold 3, inclined core head 4, inclined core rod 5, upper clamping plate 6, upper mold base 7, lower clamping plate 8, lower mold base 9, base 10, direct top rod 11, guide block 12, connecting block 13, guide slide bar 14, chute 15, undercut 16, guide chute 17.
[0027] The product with undercuts 1 is injection molded after the upper mold 3 and the lower mold 2 are closed. Correspondingly, an upper clamping plate 6 and an upper mold base 7 are sequentially provided at the top of the upper mold 3, and a lower clamping plate 8, a lower mold base 9 and a base 10 are sequentially provided at the bottom of the lower mold 2.
[0028] This embodiment discloses a direct-top and inclined-core-pulling structure for the demolding of the product with undercuts 1, as Figures 2 to 6 shown, including a direct top rod 11, an inclined core head 4 and a guide chute 14. Specifically as follows:
[0029] Direct top rod 11: A push plate is provided on the lower mold base 9. The bottom of the direct top rod 11 is connected to the push plate through a connecting block 13, and a guide block 12 is provided on the lower clamping plate 8. The direct top rod 11 is vertically slidably connected to the guide block 12 and passes through the lower clamping plate 8.
[0030] Angled ejector pin 4: A horizontal chute 15 is provided at the bottom of the angled ejector pin 4. The top of the straight ejector rod 11 is slidably connected within the chute 15. The cross-section of the chute 15 is dovetail-shaped or T-shaped to prevent the straight ejector rod 11 from disengaging from the angled ejector pin 4. Correspondingly, a cavity adapted to the angled ejector pin 4 is formed on the lower mold 2. A groove for forming the undercut 16 is formed between the angled ejector pin 4 and one of the cavities. The other sides of the angled ejector pin 4 are in close contact with the inner wall of the cavity. An inclined end face is provided on the side of the angled ejector pin 4 away from the undercut 16. Inclined guide strips 14 are symmetrically provided on two opposite side walls of the angled ejector pin 4. The guide strips 14 are parallel to the inclined end face, and the angles between the guide strips 14 and the inclined end face and the vertical plane are less than or equal to 20°. In another embodiment, corresponding guide strips 14 are also arranged on this inclined end face.
[0031] The guide chute 17 is arranged on the inner wall of the cavity of the lower mold 2. The quantity and position correspond to and are parallel to the guide strips 14. Each guide strip is in close contact with the inner wall of the corresponding guide chute 17 and is slidably connected to the inner wall of the guide chute 17.
[0032] During the implementation of the present utility model, through an external linear drive mechanism, such as a cylinder driving the push plate to move vertically, the straight ejector rod 11 can be driven to move vertically, thereby vertically lifting the angled ejector pin 4. As Figure 6 shown, the angled ejector pin 4 slides along the direction of the guide strips 14 and the guide chute 17. The sliding in this inclined direction can be decomposed into a vertical movement and a horizontal movement, so that the angled ejector pin 4 is disengaged from the undercut 16 on the product 1 with an undercut, that is, the purpose of straight-top angled core-pulling is achieved. It can be used for the undercut core-pulling of products when two (or more) undercuts 16 are symmetrically arranged or the positions of the undercuts 16 are staggered by a small amount and it is impossible to arrange two (or more) conventional angled ejector structures. Moreover, the straight-top angled core-pulling structural method does not require adjusting the angle of the straight ejector rod 11, nor does it require an angled ejector base, which saves mold space and also saves the mold raw material cost and processing cost.
[0033] The above is only a preferred embodiment of the present utility model and does not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to form an equivalent embodiment with equivalent changes within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.
Claims
1. A straight top oblique core pulling structure for demoulding products with undercuts, characterized in that: include: Straight top rod; An inclined ejector head, wherein a horizontal slide groove is provided at the bottom of the inclined ejector head, the top of the straight ejector rod is slidably connected in the slide groove, and at least one side wall of the inclined ejector head is provided with an inclined guide slide bar; The guide slide groove is obliquely arranged in a mold for processing products with undercuts and is parallel to the guide slide bar. The number of the guide slide grooves corresponds to that of the guide slide bars, and the guide slide bars are slidably connected in the corresponding guide slide grooves.
2. A straight top oblique core pulling structure for demoulding products with undercuts according to claim 1, characterized in that: An included angle between the guide slide bar and the guide slide groove and a vertical plane is less than or equal to 20°.
3. A straight top oblique core pulling structure for demoulding products with undercuts according to claim 1 or 2, characterized in that: The guide slide bars are in two pieces and are arranged on two opposite side walls of the inclined top.
4. A straight top oblique core pulling structure for demoulding products with undercuts according to claim 1, characterized in that: The cross section of the slide groove is dovetail-shaped or T-shaped.
5. The straight top oblique core pulling structure for demoulding products with undercuts according to claim 1 is characterized in that: The end of the inclined ejector head away from the undercut of the product is provided with an inclined end face, and a mold for processing the product with undercut is provided with an inclined surface adapted to the inclined end face.
6. A straight top oblique core pulling structure for demoulding products with undercuts according to claim 5, characterized in that: The guide slide is arranged on the inclined end surface and is parallel to the inclined end surface.
7. A straight top oblique core pulling structure for demoulding products with undercuts according to claim 1, characterized in that: It also includes a guide block, and the straight push rod is vertically slidably connected to the guide block.