Mould structure for demoulding EPP (Expanded Polypropylene) product

Abstract

The utility model discloses a mould structure for demoulding an EPP (Expanded Polypropylene) product, which comprises a mould part, a mould body, a plurality of movable cavities, a plurality of positioning parts, a plurality of positioning parts and a plurality of positioning parts, and is characterized in that the mould part comprises a mould body and movable cavities, the movable cavities are symmetrically formed in the center of the upper end part of the mould body; the demolding part comprises air cylinders, a main body sliding block, a limiting sliding way, a first limiting sliding block and a second limiting sliding block, the air cylinders are symmetrically arranged and connected to the position over the upper end of the mold body, the main body sliding block is arranged and connected to the position under the output ends of the air cylinders, and the main body sliding block is located in the middle of the movable cavity; the limiting sliding ways are symmetrically and slidably connected to the end of the main body sliding block, the first limiting sliding blocks are symmetrically and fixedly connected to the two sides of the center position of the upper end of the mold body, and the second limiting sliding blocks are symmetrically and fixedly connected to the end of the center position of the upper end of the mold body. According to the utility model, independent mold design is carried out on an EPP product with an inverted buckle structure exceeding 3mm, so that the risk of breakage and damage during demolding can be reduced, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field, in particular to a mold structure for demoulding an EPP product. Background Art

[0002] EPP products are objects formed by high-crystalline polypropylene foam materials and have excellent performance.

[0003] The existing EPP product has an undercut within 3mm, and the mold can be demoulded without special design. However, if the undercut exceeds 3mm, forced demoulding will cause the product to tear and become scrapped, increasing the actual cost of use. Therefore, it is necessary to provide a mold structure that can successfully demould when the undercut exceeds 3mm to solve the demoulding difficulty. Utility Model Content

[0004] The purpose of the utility model is to provide a mold structure for demoulding EPP products, so as to solve the problem raised in the above background technology that the existing EPP products have an undercut within 3mm, and the mold can be demoulded forcibly without special design, but if the undercut exceeds 3mm, forced demoulding will cause the product to tear, resulting in product scrapping, and increasing the actual cost of use.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model is a mold structure for demoulding an EPP product, comprising:

[0007] A mold part, the mold part includes a mold body and an active cavity, and the active cavity is symmetrically opened at the center of the upper end of the mold body;

[0008] The demolding part includes a cylinder, a main slider, a limit slide, a first limit slide, and a second limit slide. The cylinder is symmetrically arranged and connected to the top of the upper end of the mold body, and the main slider is arranged and connected to the bottom of the cylinder output end. The main slider is located in the middle of the active cavity. The limit slide is symmetrically slidably connected to the end of the main slider, and the first limit slide is symmetrically fixedly connected to both sides of the central position of the upper end of the mold body, and the second limit slide is symmetrically fixedly connected to the end of the central position of the upper end of the mold body.

[0009] Furthermore, the first limiting sliding block is attached to two sides of the limiting slideway.

[0010] Furthermore, a T-shaped protrusion is provided at the central position of the end of the main sliding block, and is sleeved and connected to a T-shaped groove opened in the middle of the inner side of the limiting slideway.

[0011] Furthermore, it also includes a connecting part, which includes a connecting frame and a connecting shaft. The lower end of the connecting frame is fixedly connected between the two longitudinal groups of the first limit sliders, and the ends of the connecting shaft are respectively fixed to the cylinder output end and the upper end of the main slider.

[0012] Furthermore, a through opening is provided through the middle portion of the upper end of the connecting frame, and the cylinder is threadedly connected to the middle portion of the upper end of the connecting frame, and the output end extends out of the through opening.

[0013] Furthermore, the connecting part also includes a buckle and a slot, the buckle is symmetrically fixedly connected to the opposite sides of the lower outer surface of the connecting shaft, and the slot is opened on the two inner side walls of the middle part of the upper end of the main slider, and the buckle is buckled and connected in the slot.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] The utility model adds a cylinder, a main body slider, a limit slide, a first limit slide and a second limit slide to the position of the undercut block. When demolding a mold within 3 mm, demolding can be smoothly carried out without special design. When demolding a mold exceeding 3 mm, a return force can be applied by a controlled cylinder, and the main body slider is linked to make the limit slide shrink inwardly along the first limit slide, thereby linking the connected undercut block to separate from the workpiece, and demolding is smoothly completed, reducing the probability of damage to the mold when demolding exceeds 3 mm, and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is the appearance diagram of the utility model;

[0018] Figure 2 For the utility model Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 For the utility model Figure 1 Enlarged view of point B in the middle;

[0020] Figure 4 It is a cross-sectional view of the cylinder of the utility model in the retracted state.

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0022] 11. Cylinder; 12. Main slider; 13. Limit slide; 14. First limit slider; 15. Second limit slider; 21. Connecting frame; 22. Connecting shaft; 23. Buckle; 24. Slot; 31. Mold body; 32. Active cavity; 4. Workpiece. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0025] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] See also Figure 1-4 As shown, this embodiment is a mold structure for demoulding an EPP product, comprising:

[0027] The mold part includes a mold body 31 and an active cavity 32. The active cavity 32 is symmetrically opened at the center of the upper end of the mold body 31;

[0028] The mold body 31 is a tool for processing and molding EPP products, and the movable cavity 32 satisfies the position movement of the main slider 12;

[0029] The demoulding part includes a cylinder 11, a main slider 12, a limiting slide 13, a first limiting slide 14, and a second limiting slide 15. The cylinder 11 is symmetrically arranged and connected to the top of the upper end of the mold body 31, and the main slider 12 is arranged and connected to the bottom of the output end of the cylinder 11. The main slider 12 is located in the middle of the movable cavity 32. The limiting slide 13 is symmetrically slidably connected to the ends of the main slider 12, and the first limiting slide 14 is symmetrically fixedly connected to the two sides of the central position of the upper end of the mold body 31. The second limiting slide 15 is symmetrically fixedly connected to the ends of the central position of the upper end of the mold body 31, and the lower end of the limiting slide 13 is fitted with the undercut position of the inner wall of the workpiece 4 arranged below;

[0030] The cylinder 11 provides the power required for the lifting of the connected structure. The main slider 12 is connected to the limit slide 13 and is used to transmit the lifting force. The first limit slide 14 guides the position of the limit slide 13 during lifting, and the second limit slide 15 determines the position of the limit slide 13 at the end of the stroke.

[0031] The first limiting slider 14 is attached to two sides of the limiting slideway 13;

[0032] The first limiting slider 14 fits with the limiting slideway 13 to guide the lifting position of the limiting slideway 13. After the limiting slideway 13 finishes its travel, it can fit with the second limiting slider 15 to limit its structure.

[0033] A T-shaped protrusion is provided at the center of the end of the main slide block 12, and is sleeved and connected to a T-shaped groove provided at the middle of the inner side of the limiting slideway 13;

[0034] It also includes a connecting part, which includes a connecting frame 21 and a connecting shaft 22. The lower end of the connecting frame 21 is fixedly connected between the two longitudinal groups of first limit sliders 14, and the ends of the connecting shaft 22 are respectively fixed to the output end of the cylinder 11 and the upper end of the main slider 12;

[0035] The connecting frame 21 is used to install the cylinder 11, and the connecting shaft 22 is used to install and fix the cylinder 11 and the main slide block 12;

[0036] A through hole is formed in the middle of the upper end of the connecting frame 21, and the cylinder 11 is threadedly connected to the middle of the upper end of the connecting frame 21, and the output end extends out of the through hole;

[0037] The opening satisfies the up and down movement of the output end of the cylinder 11 and provides movement space;

[0038] The connecting portion further includes a buckle 23 and a slot 24. The buckle 23 is symmetrically fixedly connected to opposite sides of the lower outer surface of the connecting shaft 22, and the slot 24 is provided on two inner side walls of the middle part of the upper end of the main slider 12. The buckle 23 is buckled and connected in the slot 24.

[0039] By snapping the buckle 23 into the slot 24, the connecting shaft 22 and the main body slider 12 can be installed and fixed, thereby satisfying the structural installation between the cylinder 11 and the main body slider 12 and facilitating subsequent disassembly;

[0040] Working principle: When demoulding EPP products with undercut structures within 3mm, forced demoulding can be performed without additional design;

[0041] When demoulding an EPP product with an undercut structure exceeding 3 mm, a separate mold treatment can be performed on the undercut structure, that is, the connected main body slider 12 is moved downward under the ejection effect of the controlled cylinder 11, and the linkage limit slide 13 is extended outward along the first limit slide 14 until it fits with the second limit slide 15, that is, it is in the mold cavity on the mold body 31, and then injection molding is performed, and after the workpiece 4 is formed, a reverse retraction force can be applied by the controlled cylinder 11, so that the limit slide 13 is contracted inward along the first limit slide 14;

[0042] This solution uses a separate mold for the undercut position of EPP products with an undercut structure exceeding 3mm, which can reduce the risk of breakage and damage during subsequent demolding, reduce usage costs, and meet usage needs.

[0043] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A mold structure for demoulding an EPP product, characterized in that: include: A mold part, the mold part comprising a mold body (31) and an active cavity (32), wherein the active cavity (32) is symmetrically arranged at a central position of an upper end portion of the mold body (31); A demoulding part, the demoulding part comprises a cylinder (11), a main slider (12), a limiting slideway (13), a first limiting slideway (14), and a second limiting slideway (15); the cylinder (11) is symmetrically arranged and connected to the top of the upper end of the mold body (31), and the main slider (12) is arranged and connected to the bottom of the output end of the cylinder (11); the main slider (12) is located in the middle of the movable cavity (32); the limiting slideway (13) is symmetrically slidably connected to the end of the main slider (12), and the first limiting slideway (14) is symmetrically fixedly connected to the two sides of the central position of the upper end of the mold body (31); the second limiting slideway (15) is symmetrically fixedly connected to the ends of the central position of the upper end of the mold body (31), and the lower end of the limiting slideway (13) is in contact with the undercut position of the inner side walls of the workpiece (4) arranged below.

2. The mold structure for demoulding an EPP product according to claim 1, characterized in that: The first limiting sliding block (14) is in contact with two sides of the limiting slideway (13).

3. The mold structure for demoulding an EPP product according to claim 1, characterized in that: A T-shaped protrusion is provided at the center of the end of the main sliding block (12), and is sleeved and connected in a T-shaped groove provided in the middle of the inner side of the limiting sliding track (13).

4. The mold structure for demoulding an EPP product according to claim 1, characterized in that: It also includes a connecting portion, which includes a connecting frame (21) and a connecting shaft (22). The lower end of the connecting frame (21) is fixedly connected between two longitudinal groups of the first limit sliders (14), and the ends of the connecting shaft (22) are respectively fixed to the output end of the cylinder (11) and the upper end of the main slider (12).

5. The mold structure for demoulding an EPP product according to claim 4, characterized in that: A through hole is formed in the middle of the upper end of the connecting frame (21), and the cylinder (11) is threadedly connected to the middle of the upper end of the connecting frame (21), with the output end extending out of the through hole.

6. The mold structure for demoulding an EPP product according to claim 4, characterized in that: The connecting portion further comprises a buckle (23) and a slot (24), wherein the buckle (23) is symmetrically fixedly connected to opposite sides of the lower outer surface of the connecting shaft (22), and the slot (24) is arranged on two inner side walls of the middle part of the upper end of the main slide block (12), and the buckle (23) is buckled and connected in the slot (24).

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