Delayed core-pulling mold for forcibly releasing slide block
By using a slider-driven delayed core-pulling mold and the combined design of inclined guide pillars and delayed components, secondary core pulling of plastic products is achieved, solving the demolding problem of thin undercut parts and improving product quality and production efficiency.
Patent Information
- Application Number
- CN202423100013.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-16
AI Technical Summary
In the injection molding process of existing plastic products, especially the thin undercut portion on the winged protrusion, it is difficult to demold effectively, resulting in excessive core pulling force and affecting product quality.
A sliding block forced release delayed core-pulling mold is adopted. The main slider and the pull plate are driven to move by the inclined guide post. After the first core pulling, the delay part removes the restriction on the small slider. With the help of the pull plate, the small slider is driven to achieve the second core pulling, reducing the core pulling force of the slider.
This technology enables two core-pulling operations to be completed in a single mold-opening action, reducing the core-pulling force of the slider and improving the demolding effect and quality of the product.
Smart Images
Figure CN223590018U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an injection mold, and more particularly to a slider-driven delayed core-pulling mold. Background Technology
[0002] Plastic injection molds are tools used to produce plastic products and have a wide range of applications. In the injection molding of plastic products, the opening sequence of the mold parting surface is controlled to meet the needs of the molding process, such as... Figure 1 As shown, the plastic product 100 has a through hole 101 and a winged protrusion 102. The protrusion 102 has a thin undercut 103. The plastic part is thin and not easy to be injection molded. In order to reduce the core pulling force and ensure product quality, it is necessary to demold in stages. Utility Model Content
[0003] The purpose of this invention is to provide a simple structure that enables delayed core pulling by a secondary core-pulling slider.
[0004] To achieve the above objectives, the technical solution of this utility model is:
[0005] This utility model is a sliding block strong release delayed core pulling mold, including a fixed template, a moving template, an inclined guide post, a main slider, a shovel base, a small slider, a pull plate, and a delay component;
[0006] The fixed template and the moving template are joined together. The upper part of the inclined guide post is fixed to the fixed template, and the lower part of the inclined guide post is sequentially inserted into the inclined guide post hole of the main slider and the guide post hole of the pull plate. The main slider slides on the moving template, and the outer end of the main slider abuts against the shovel base. The upper end of the shovel base is fixed to the fixed template, and the inner end of the main slider extends into the cavity. The pull plate slides on the moving template, and the inner side of the small slider slides between the main slider and the moving template. The outer side of the small slider slides between the main slider and the pull plate, and the inner end of the small slider extends into the cavity. The outer end of the small slider has a downward protrusion, and the inner end of the pull plate has an upward pull block. The pull block of the pull plate can abut against the protrusion of the small slider. Driven by the inclined guide post, the pull block of the pull plate moves outward and can drive the small slider to move outward by cooperating with the protrusion of the small slider. The upper end of the delay component is fixed to the bottom surface of the main slider, and the lower end of the delay component abuts against the inner end of the limiting groove of the small slider to restrict the movement of the small slider.
[0007] This utility model also includes a panel, an upper pad, a square iron, and a bottom plate; the panel, the upper pad, and the fixed template are fixed together in sequence, and the movable template is fixed together with the bottom plate by the square iron, and there is an ejection space between the movable template and the bottom plate.
[0008] This utility model also includes a molded insert; the molded insert is fixed on the notch at the inner end of the small slider.
[0009] According to the above scheme, since the utility model discloses a mould, including fixed mould plate, movable mould plate, inclined guide pillar, main sliding block, shovel base, small sliding block, pull-out plate, delay piece, when opening the mould, the inclined guide pillar drives the main sliding block and pull-out plate to move outward, the main sliding block separates from the plastic product main body, realizes the first time core-pulling, continues to open the mould, the delay piece will move outward along with the main sliding block that moves outward, thereby cancels the restriction to the small sliding block, the pull-out plate pull block that moves outward drives the small sliding block to move outward through the cooperation with the small sliding block protruding block, realizes the second time core-pulling, since the utility model is sectional type core-pulling design, reduces the sliding block core-pulling strength, can realize the second time core-pulling in one time opening the mould action, has the advantages such as simple structure.
[0010] The utility model will be further explained in connection with the drawings and specific embodiments. DESCRIPTION OF DRAWINGS
[0011] Figure 1 It is the axonometric view of plastic product;
[0012] Figure 2 It is the axonometric view of plastic product convex column;
[0013] Figure 3 It is the section view of the utility model;
[0014] Figure 4 It is the plan view of the main sliding block part of the utility model;
[0015] Figure 5 It is Figure 3 It is the section view along B-B line;
[0016] Figure 6 It is the axonometric view of the main sliding block part of the utility model;
[0017] Figure 7 It is the axonometric view of small sliding block of the utility model. PREFERRED EMBODIMENT
[0018] As Figures 3-7 The utility model discloses a sliding block strong delay core-pulling mould, including panel 1, upper backing plate 2, fixed mould plate 3, movable mould plate 4, square iron 5, bottom plate 6, inclined guide pillar 7, main sliding block 8, small sliding block 9, shovel base 10, pull-out plate 20, delay piece 30, forming insert 40.
[0019] The panel 1, upper backing plate 2, fixed mould plate 3 are fixed in sequence, and the fixed mould plate 3 and movable mould plate 4 are close together, and the movable mould plate 4 is fixed together with the bottom plate 6 through the square iron 5, and there is a ejection space between the movable mould plate 4 and the bottom plate 6.
[0020] The upper part of the inclined guide pillar 7 is fixed on the fixed mold plate 3, the lower part of the inclined guide pillar 7 is sequentially movably arranged in the inclined guide pillar hole 81 of the main sliding block 8 and the guide pillar hole 201 of the pull-out plate 20, the main sliding block 8 is slidably connected on the movable mold plate 4, the outer end of the main sliding block 8 abuts against the base 10, the upper end of the base 10 is fixed on the fixed mold plate 3, the inner end of the main sliding block 8 extends into the cavity, the pull-out plate 20 is slidably connected on the movable mold plate 4, the inner side of the small sliding block 9 is slidably connected between the main sliding block 8 and the movable mold plate 4, the outer side of the small sliding block 9 is slidably connected between the main sliding block 8 and the pull-out plate 20, the inner end of the small sliding block 9 extends into the cavity, the outer end of the small sliding block 9 is provided with a downward protrusion 91, the inner end of the pull-out plate 20 is provided with an upward pull block 202, the pull block 202 of the pull-out plate 20 can abut against the protrusion 91 of the small sliding block 9, and the pull block 202 of the pull-out plate 20 driven to move outward by the inclined guide pillar 7 can drive the small sliding block 9 to move outward by cooperation with the protrusion 91 of the small sliding block 9, so that secondary core pulling is realized, the upper end of the delay element 30 is fixed on the bottom surface of the main sliding block 8, the lower end of the delay element 30 abuts against the inner end of the limiting groove 92 of the small sliding block 9, so that the movement of the small sliding block 9 is limited, and delayed core pulling is realized, and the delay element 30 moves outward along with the outward movement of the main sliding block 8, so that the limitation on the small sliding block 9 is cancelled.
[0021] The forming insert 40 is fixed on the missing groove 93 of the inner end of the small sliding block 9, the forming insert 40 is composed of a plurality of small inserts and is a joint insert design, air exhaust is increased, products are easy to form and demould, the small sliding block 9 is a switching type sliding block main insert, space is saved, and the small sliding block 9 is limited in a limited stroke.
[0022] The working principle of the utility model is as follows:
[0023] When the mold is opened, the inclined guide pillar 7 drives the main sliding block 8 and the pull-out plate 20 to move outward, the main sliding block 8 is separated from the main body of the plastic product 100, and the first core pulling is realized, at this time, the small sliding block 9 is abutted by the delay element 30 and cannot be simultaneously core-pulled; the delay element 30 moves outward along with the outward movement of the main sliding block 8, so that the limitation on the small sliding block 9 is cancelled, the pull block of the pull-out plate 20 moves outward and drives the small sliding block 9 to move outward by cooperation with the protrusion 91 of the small sliding block 9, and the second core pulling is realized.
[0024] The above is only the preferred embodiment of the utility model, and therefore cannot limit the range of the utility model, that is, equivalent changes and modifications made according to the patent range and content of the specification should still belong to the range covered by the utility model patent.
Claims
1. A slide knockout delay action mold characterized by: The application relates to a mould structure, which comprises a fixed mould plate, a movable mould plate, an inclined guide pillar, a main sliding block, a shovel base, a small sliding block, a pulling plate, a delay element, a panel, an upper cushion plate, a square iron and a bottom plate. The fixed mould plate and the movable mould plate are abutted together, the upper part of the inclined guide pillar is fixed on the fixed mould plate, the lower part of the inclined guide pillar is sequentially movably arranged in the inclined guide pillar hole of the main sliding block and the guide pillar hole of the pulling plate, the main sliding block is slidably connected on the movable mould plate, the outer end of the main sliding block is abutted against the shovel base, the upper end of the shovel base is fixed on the fixed mould plate, the inner end of the main sliding block extends into a cavity, the pulling plate is slidably connected on the movable mould plate, the inner side of the small sliding block is slidably connected between the main sliding block and the movable mould plate, the outer side of the small sliding block is slidably connected between the main sliding block and the pulling plate, the inner end of the small sliding block extends into the cavity, the outer end of the small sliding block is provided with a downward protruding block, the inner end of the pulling plate is provided with an upward pulling block, the pulling block of the pulling plate can abut against the protruding block of the small sliding block, the pulling block of the pulling plate which is driven to move outward by the inclined guide pillar can drive the small sliding block to move outward by cooperation with the protruding block of the small sliding block, the upper end of the delay element is fixed on the bottom surface of the main sliding block, and the lower end of the delay element abuts against the inner end of the limiting groove of the small sliding block to limit the movement of the small sliding block.
2. The slide-and-stay delayed action draw mold according to claim 1, wherein: The panel, the upper cushion plate and the fixed mould plate are sequentially fixed together, the movable mould plate is fixed together with the bottom plate through the square iron, and the movable mould plate and the bottom plate are provided with an ejection space.
3. The slide-and-stay delayed action draw mold according to claim 1, wherein: The mould structure further comprises a forming insert, and the forming insert is fixed on the inner end of the small sliding block. The mould structure further comprises a panel, an upper cushion plate, a square iron and a bottom plate.