Demolding mechanism for injection mold

Abstract

The utility model belongs to the field of injection molds, and particularly relates to a demolding mechanism for an injection mold, the demolding mechanism is mounted on a fixed mold set, the fixed mold set comprises a bearing plate, a fixed mold seat is fixed at the upper end of the bearing plate, and a mold cavity with an open upper end is arranged in the middle of the fixed mold seat; at least two driving cylinders spaced in the left-right direction are arranged at the lower end of the bearing plate, each driving cylinder is provided with a power output end, a push plate arranged in the front-back direction is fixed to the upper end of each power output end, a plurality of ejector rods are arranged on each push plate in the front-back direction at intervals, and penetrating holes allowing the ejector rods to penetrate through are formed in the bottom of the mold cavity; in the direction from left to right, the strokes of the at least two driving cylinders are sequentially reduced, so that when the power output end extends to the longest, the heights of the upper ends of the ejector rods are sequentially reduced step by step; and the upper part of the fixed die holder is provided with a slideway for a product to slide downwards on the right side of the die cavity. According to the scheme, a plurality of independent driving cylinders are adopted, the ejector rod is controlled to move upwards to form a height difference, so that a product inclines and slides downwards, and finally, the product is automatically demoulded and taken out.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds, and particularly relates to a demoulding mechanism used on an injection mold. Background Art

[0002] Injection molds are usually installed on injection molding machines and are widely used in various industries, such as automobile manufacturing, electronic product manufacturing, medical device manufacturing, etc. The principle of injection molding is to inject liquid rubber into the mold cavity through pressure, and the rubber solidifies or solidifies to form a product. The product is taken out after the injection mold is opened.

[0003] The role of the demoulding mechanism in the injection mold is to quickly remove the molded product from the mold. Especially in the injection mold of the vertical injection molding machine, the demoulding method of the demoulding mechanism is mostly to set a push rod at the lower end of the fixed mold. After the injection is completed and the mold is opened, the push rod is controlled to eject the product from the fixed mold. The existing push rod demoulding method is to control the push rod to move upward synchronously at the same height to separate the product from the fixed mold cavity wall, and then take the product away manually or by a robot. The injection mold itself does not have an automatic blanking function. Utility Model Content

[0004] The utility model aims to provide an improved self-demolding mechanism, which is convenient for demoulding and taking out products from an injection mold by optimizing the ejection mode of an ejector pin.

[0005] A demoulding mechanism for an injection mold, which is installed on a fixed mold group, the fixed mold group includes a bearing plate, a fixed mold seat is fixed on the upper end of the bearing plate, and a mold cavity with an open upper end is arranged in the middle of the fixed mold seat; at least two driving cylinders spaced along the left and right directions are arranged at the lower end of the bearing plate, each driving cylinder has a power output end that can move up and down, a push plate arranged along the front and back directions is fixed to the upper end of the power output end, a plurality of ejector rods are spaced along the front and back directions on the push plate, and a through hole for the ejector rods to pass through is arranged at the bottom of the mold cavity; from left to right, the strokes of the at least two driving cylinders are reduced successively, so that when the power output end is extended to the longest, the height of the upper end of the ejector rod is reduced step by step; a slide for the product to slide down is arranged on the upper part of the fixed mold seat on the right side of the mold cavity.

[0006] Furthermore, the fixed mold base includes a first fixed mold base and a second fixed mold base arranged above the right end of the first fixed mold base, the slideway is formed between the first fixed mold base and the second fixed mold base, and a reinforcing plate is provided between the first fixed mold base and the second fixed mold base.

[0007] Furthermore, a plurality of supporting columns are provided at the lower end of the bearing plate, and a base is provided at the lower end of the supporting columns. The supporting columns leave a plurality of accommodating areas for installing driving cylinders between the bearing plate and the base, and the driving cylinders are installed on the base.

[0008] Furthermore, upper ends of multiple push rods on the same push plate are all connected to the same push plate.

[0009] Furthermore, a positioning groove for accommodating the top plate is provided at the bottom of the mold cavity.

[0010] Furthermore, the lower end of the slideway is open and is arranged on the side wall of the fixed mold base.

[0011] Furthermore, the driving cylinder is a pneumatic cylinder or an oil cylinder.

[0012] The beneficial effects of the utility model are as follows: in the utility model, the structure of the injection mold is optimized and designed, specifically, at least two driving cylinders are arranged at the lower end of the carrying plate, and the at least two driving cylinders are arranged at intervals from left to right below the mold cavity, each driving cylinder has a power output end that can move up and down, and a push plate arranged along the front-back direction is fixed on the upper end of the power output end, and a plurality of ejector rods are arranged on the push plate, and when the push plate is driven by the driving cylinder to move upward, the ejector rods are driven to move upward and lift the product in the mold cavity upward; and in the direction from left to right, the strokes of the at least two driving cylinders are reduced successively, and when working, the power output end of the driving cylinder is extended to the longest, and the height of the upper end of the ejector rod is gradually reduced in the direction from left to right, so that the product can be inclined with the left side higher and the right side lower, so that the product can slide downward under the action of gravity and slide down through the slideway for storage, so that there is no need to manually or use a robot to take the product out of the injection mold, the structure is reasonable, and it has good practicality.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the demoulding mechanism in the utility model (the power output shaft is shortened).

[0015] Figure 2 It is a structural schematic diagram of the demoulding mechanism of the utility model (when the power output shaft is extended).

[0016] Figure 3 It is a cross-sectional view of the demoulding mechanism in the utility model in the front-to-back direction.

[0017] The accompanying drawings are marked as follows:

[0018] DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1 to Figure 3 The demoulding mechanism of the utility model is installed on the fixed die set, which includes a carrying plate 1, a fixed die seat 2 is fixed on the upper end of the carrying plate 1, and a mold cavity 201 with an open upper end is arranged in the middle of the fixed die seat 2, and the mold cavity 201 is used for injection molding of the desired product; the lower end of the carrying plate 1 is provided with an ejection module 3 formed by at least two drive cylinders 301 spaced apart in the left and right directions, each drive cylinder 301 has a power output end that can move up and down, and a push plate 302 arranged in the front-to-back direction is fixed on the upper end of the power output end, and a plurality of ejector rods 303 are spaced apart in the front-to-back direction on the push plate 302, and a through hole for the ejector rod 303 to pass through is arranged at the bottom of the mold cavity 201; from left to right, the stroke of the at least two drive cylinders 301 is reduced successively, so that when the power output end is extended to the longest, the height of the upper end of the ejector rod 303 is reduced step by step; the upper part of the fixed die seat 2 is provided with a slideway 204 on the right side of the mold cavity 201 for the product to slide down.

[0021] In the present technology, at least two driving cylinders 301 are arranged at the lower end of the carrier plate 1, and the at least two driving cylinders 301 are arranged at intervals from left to right below the mold cavity 201. Each driving cylinder 301 has a power output end that can move up and down, and a push plate 302 arranged along the front-back direction is fixed on the upper end of the power output end. A plurality of push rods 303 are arranged on the push plate 302. When the push plate 302 is driven by the driving cylinder 301 to move upward, the push rods 303 are driven to move upward and can push the product in the mold cavity 201 upward; and from left to right, the strokes of the at least two driving cylinders 301 are reduced successively, such as Figure 2 As shown, when the demoulding mechanism is working, the power output end of the driving cylinder 301 is extended to the longest, and the height of the upper end of the push rod 301 is gradually reduced from left to right, so that the product can be tilted with the left side higher and the right side lower. In this way, the product can slide downward under the action of gravity and slide down through the slide 204 for storage. In this way, there is no need for manual labor or a robot to take the product out of the injection mold. The structure is reasonable and has good practicality.

[0022] Preferably, Figure 1 and Figure 2 As shown, the driving cylinders 301 are arranged in three groups, and the ejector rods 303 on the three groups of driving cylinders 301 are respectively displaced to the left side, the middle, and the right side in the mold cavity 201 .

[0023] Based on the above embodiments, Figure 1 and Figure 2 As shown, the fixed mold base 2 is designed to be configured as two parts, a first fixed mold base 202 and a second fixed mold base 203. The second fixed mold base 203 is disposed above the right end of the first fixed mold base 202. An inclined slideway 204 is left between the first fixed mold base 202 and the second fixed mold base 203. A reinforcing plate 205 is disposed between the first fixed mold base 202 and the second fixed mold base 203. The first fixed mold base 202 and the second fixed mold base 203 are fixed by the reinforcing plate 205 to space the first fixed mold base 202 and the second fixed mold base 203, and an inclined slideway 204 is formed therebetween. The slideway 204 is higher on the left and lower on the right. The slideway 204 is open at the left end of the mold cavity 201 for products to fall into the slideway 204. The slideway 204 is open at the right end away from the mold cavity 201 for products to slide out of the slideway 204. The injection mold is more suitable for injection molding products with a flat bottom, so that the products can slide more smoothly.

[0024] In order to facilitate the up and down movement of the push plate 302, an opening for moving the push plate 302 is provided on the fixed mold base 2 and the supporting plate 1. The opening is for the push plate 302 to move up and down. The opening is connected to the above-mentioned through hole, and the supporting plate 1 is attached to the lower end of the fixed mold base 2.

[0025] Combination Figures 1 to 3 As shown, in order to stably eject the product during the upward push of the ejector rod 303, the upper ends of the multiple ejector rods 303 on the same push plate 302 are all connected to the same ejector plate 304. The provision of the ejector plate 304 can increase the contact surface with the product, ensuring that the product is ejected and slides rightward into the slideway 204. At the same time, a positioning groove 206 for accommodating the ejector plate 304 is provided at the bottom of the mold cavity 201. The ejector plate 304 can fit in the positioning groove 206. After the power output end of the driving cylinder 301 is retracted, the ejector plate 304 falls into the positioning groove 206, and the top surface of the ejector plate 304 is flush with the inner bottom wall of the mold cavity 201, so as to prevent the ejector plate 304 from protruding from the mold cavity 201 and affecting the molding of the product.

[0026] In order to accommodate the installation of the drive cylinder 301, a plurality of support columns 101 are provided at the lower end of the supporting plate 1, and a base 102 is provided at the lower end of the support columns 101. The support columns 101 allow a plurality of accommodating areas 103 for installing the drive cylinders 301 to be left between the supporting plate 1 and the base 102. The drive cylinder 301 is installed on the base 102 and is located in the accommodating area 103 between the base 102 and the supporting plate 1.

[0027] The driving cylinder 301 in this embodiment is an air cylinder or an oil cylinder, and correspondingly, the power output end is an air cylinder rod or an oil cylinder rod.

[0028] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. A demoulding mechanism for an injection mold, the demoulding mechanism being mounted on a fixed mold assembly, Features: The fixed die assembly comprises a bearing plate (1), a fixed die seat (2) is fixed at the upper end of the bearing plate (1), and a die cavity (201) with an open upper end is arranged in the middle of the fixed die seat (2); at least two drive cylinders (301) are arranged at intervals along the left-right direction at the lower end of the bearing plate (1), each drive cylinder (301) has a power output end that can move up and down, a push plate (302) arranged along the front-back direction is fixed at the upper end of the power output end, a plurality of push rods (303) are arranged at intervals along the front-back direction on the push plate (302), and a through hole for the push rods (303) to pass through is arranged at the bottom of the die cavity (201); From left to right, the strokes of the at least two driving cylinders (301) are reduced in sequence, so that when the power output end is extended to the longest, the height of the upper end of the push rod (303) is reduced step by step; the upper part of the fixed mold base (2) is provided with a slideway (204) on the right side of the mold cavity (201) for the product to slide downward.

2. A demoulding mechanism for an injection mold according to claim 1, Features: The fixed mold base (2) comprises a first fixed mold base (202) and a second fixed mold base (203) arranged above the right end of the first fixed mold base (202), the slideway (204) is formed between the first fixed mold base (202) and the second fixed mold base (203), and a reinforcing plate (205) is provided between the first fixed mold base (202) and the second fixed mold base (203).

3. A demoulding mechanism for an injection mold according to claim 1, Features: A plurality of support columns (101) are provided at the lower end of the support plate (1), and a base (102) is provided at the lower end of the support columns (101). The support columns (101) allow a plurality of accommodating areas (103) for installing drive cylinders (301) to be left between the support plate (1) and the base (102), and the drive cylinders (301) are installed on the base (102).

4. A demoulding mechanism for an injection mold according to claim 1, Features: The upper ends of the plurality of push rods (303) on the same push plate (302) are all connected to the same top plate (304).

5. A demoulding mechanism for an injection mold according to claim 4, Features: The bottom of the mold cavity (201) is provided with a positioning groove (206) for accommodating the top plate (304).

6. A demoulding mechanism for an injection mold according to claim 1, Features: The lower end of the slideway (204) is open and is arranged on the side wall of the fixed mold base (2).

7. A demoulding mechanism for an injection mold according to claim 1, Features: The driving cylinder (301) is a pneumatic cylinder or an oil cylinder.

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