CN219028351U - Demolding mechanism for inverted buckle structure on product - Google Patents

Abstract

The utility model discloses a demoulding mechanism for a back-off structure on a product, which comprises a slide block main body, wherein a slide groove and a spring mounting cavity with central axes coincident are sequentially arranged on the lower surface of the slide block main body; the bottom of the sliding groove is provided with a fixed plate, a sliding cavity is defined by the fixed plate and the sliding groove, and a drag hook is movably arranged in the sliding cavity; a limiting wall space is arranged on one side wall of the sliding groove, a limiting block corresponding to the limiting wall space is detachably arranged at the inner end of the drag hook, and the limiting block is arranged in the limiting wall space to slide relatively; and a nitrogen spring is arranged in the spring mounting cavity, one end of the nitrogen spring props against the inner end of the drag hook, and the other end of the nitrogen spring is fixed with the slide block main body through the fixed block. The utility model has simple structure and reasonable arrangement, and when in demolding, the large side edge of the product is pulled outwards to deform by utilizing the pull hook, so that the product is separated from the mold core, and the inverted demolding of the product is completed by matching with the ejection structure in the mold, thereby ensuring the integrity of the whole product, improving the quality of the product and improving the production efficiency of injection molding.

Description

Demolding mechanism for inverted buckle structure on product

Technical Field

The utility model relates to the technical field of injection molds, in particular to a demolding mechanism for a back-off structure on a product.

Background

With the rapid development of the plastic industry, various tools and products used in daily production and life, such as ships, automobiles, screws, buttons and shells of various household appliances, are not closely related to plastic products. Injection molds are important process equipment for producing various plastic industrial products, and are also tools for endowing plastic products with complete structures and precise dimensions. Injection molding is a processing method used for mass production of parts with complex shapes; specifically, heated and melted plastic is injected into a die cavity formed by buckling a movable die and a fixed die through an injection molding machine under high pressure, and a formed product is obtained after cooling and solidification. However, according to the demand of product processing, the lower part of some plastic products is provided with the back-off, and the shaping of back-off structure often cooperates specific slider to accomplish corresponding moulding plastics in the mould, but simultaneously because the setting of back-off structure in the big side of product, more complicacy when leading to the product drawing of patterns, only carry out the damage that the drawing of patterns caused the back-off structure easily through traditional ejecting structure, destroy the product surface, influence the quality of whole plastic products, and then influence injection moulding's efficiency.

Disclosure of Invention

The utility model aims to solve the defects of the prior art and provides a demoulding mechanism for a back-off structure on a product.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a demoulding mechanism for back-off structure on product, includes the slider main part, the lower part of slider main part is equipped with sliding tray and spring installation cavity in proper order, the central axis coincidence of both. A fixed plate is fixedly arranged below the sliding groove, a sliding cavity with an opening at the left end is surrounded by the fixed plate and the sliding groove, and a drag hook is movably arranged in the sliding cavity; a limiting wall space is arranged on one side wall of the sliding groove, a limiting block is detachably arranged at the inner end of the drag hook and at one side corresponding to the limiting wall space, the limiting block is arranged in the limiting wall space to slide relatively, and a product forming gap is reserved between the outer end of the drag hook and the sliding block main body and extends out of the sliding cavity; and a nitrogen spring is arranged in the spring mounting cavity, one end of the nitrogen spring props against the inner end of the drag hook, and the other end of the nitrogen spring is fixed with the slide block main body through the fixed block.

Further, two slide block bodies are arranged oppositely, and drag hooks and nitrogen springs are arranged on the slide block bodies; the outside of slider main part is equipped with hydraulic cylinder, and the end of piston rod in the hydraulic cylinder is connected to the slider main part and drives its slip.

Further, the sliding groove is arranged on the sliding block main body at a position corresponding to the molding position of the product back-off structure.

Further, the drag hook comprises a pull rod and a drag hook main body which are fixedly connected and integrally formed, wherein the shape of the drag hook main body is matched with a molding die of a back-off structure on a product, and the upper end of the inner side of the drag hook main body is propped against the back-off position of the product to be pulled and deformed; and the outer side walls of the pull rods are respectively provided with an oil guide groove.

Further, the upper side wall of the sliding groove is provided with a limiting wall space consistent with the length direction of the sliding groove; the upper side wall of the pull rod in the drag hook is fixedly provided with a limiting block protruding upwards through a countersunk bolt, and the upper part of the limiting block is arranged in the limiting wall space.

Further, the setting length of the limiting wall space is equal to the interval distance between the outer side wall of the limiting wall space and the sliding block main body when the product is demolded; when the die is opened, the sliding block main body outwards moves to a certain distance under the driving of the corresponding hydraulic oil cylinder, and the sliding block main body hangs the drag hook to synchronously outwards move, so that the product is pulled and deformed.

Compared with the prior art, the utility model has the following beneficial effects: the utility model has simple structure and reasonable arrangement, the drag hook is arranged on the slide block main body, the drag hook is utilized to pull the back-off structure on the large side edge of the product to deform outwards during demolding, so that the product is separated from the injection mold, and then the ejection structure correspondingly arranged in the mold is matched, so that the demolding of the whole plastic product is completed, the integrity of the whole product is ensured, the product quality is improved, and the production efficiency of injection molding is improved.

Drawings

FIG. 1 is a schematic structural view of an injection molded product;

FIG. 2 is a diagram showing the relationship between the present utility model and a product;

FIG. 3 is a top view of the present utility model;

FIG. 4 is a cross-sectional view taken along the direction A-A in FIG. 3;

FIG. 5 is a bottom view of the slider body of the present utility model;

FIG. 6 is a diagram showing the relationship between the retractor and the nitrogen spring according to the present utility model;

FIG. 7 is a schematic diagram of the retractor of the utility model;

FIG. 8 is a schematic view of another embodiment of the retractor of the utility model;

in the figure: 1. left slider main part, 2, right slider main part, 3, hydraulic cylinder, 4, drag hook, 5, product, 6, back-off structure, 7, nitrogen spring, 8, fixed block, 9, fixed plate, 10, sliding tray, 11, spring installation cavity, 12, spacing wall is empty, 41, pull rod, 42, drag hook main part, 43, stopper, 44, oil guide groove.

Detailed Description

It should be noted that, in the description of the present utility model, terms such as "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and relational terms are merely determined for convenience in describing structural relationships of the components in the present utility model, and do not particularly denote that any one of the components of the present utility model must have a specific orientation, be configured and operated in a specific orientation, and should not be construed as limiting the present utility model.

It should be further noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and include, for example, either fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings:

as shown in fig. 1, when the automobile product 5 is injection molded, the inverted structure 6 is arranged on the inner side of the lower end of the product 5 due to the use or installation requirement, and the injection molding is completed by the relative buckling of the mold core side and the mold cavity side; after molding, the mold is opened, and the demolding operation is complicated because the inverted structure 6 is buckled on the mold, and the product 5 is not easy to separate from the mold, so the utility model provides a demolding mechanism for the inverted structure on the product, which is applicable to the large side of the product shown in fig. 1, has low hardness, and the surface of the product is not provided with too many ribs, so that the product can be deformed, and the demolding is performed.

Referring to fig. 2 to 4, a demolding mechanism for a back-off structure on a product comprises a left slider body 1 and a right slider body 2, which are oppositely arranged at the left side and the right side of a mold core side, and the inner side surface of the demolding mechanism is used for injection molding of the product. Corresponding to the setting position of the back-off structure 6 on the product 5, the lower surfaces of the left slider main body 1 and the right slider main body 2 are respectively provided with a sliding groove 10, as shown in fig. 5, the rear ends of the sliding grooves 10 are communicated with each other and are provided with spring mounting cavities 11, the central axes of the two are coincident, and the setting direction of the two is consistent with the sliding direction of the slider main body; the upper side wall of the sliding groove 10 is also provided with a concave limiting wall space 12, and the setting direction of the limiting wall space 12 is consistent with the length direction of the sliding groove 10. The bottom of the sliding groove 10 is fixedly provided with a fixed plate 9 through countersunk bolts, the fixed plate 9 and the sliding groove 10 enclose a sliding cavity, a drag hook 4 is slidably arranged in the sliding cavity, and the outer end of the drag hook 4 extends out of the sliding cavity and is positioned in an inner side product forming area of the sliding block main body.

Referring to fig. 6 to 8, the retractor 4 includes a pull rod 41 and a retractor body 42, which are sequentially and fixedly connected, and integrally formed; wherein the pull rod 41 is accommodated in the sliding cavity, a limiting block 43 protruding upwards is detachably fixed on the upper side surface of the pull rod corresponding to the limiting wall space 12 through a countersunk bolt, the size of the limiting block 43 is matched with that of the limiting wall space 12, and the upper end part of the limiting block is embedded and installed in the limiting wall space 12 and can slide relatively along the limiting wall space 12; the above-mentioned drag hook main body 42 is mainly configured according to the design of the corresponding back-off structure 6, and has a plurality of different specification models, as shown in fig. 7 and 8, only by taking the present utility model as an example, the drag hook 4 shown in fig. 7 is structurally adapted to be installed in the left slider main body 1, the drag hook 4 shown in fig. 8 is structurally adapted to be installed in the right slider main body 2, and the upper ends of the inner sides of the two drag hook main bodies 42 respectively support against the back-off positions of the corresponding side products 5 to be deformed by pulling. The nitrogen spring 7 is installed in the spring installation cavity 11, one end of the nitrogen spring 7 props against the inner end of the pull rod 41 in the drag hook 4, and the other end is fixedly installed on the corresponding slider main body through the fixed block 8 and the countersunk head bolt.

As a further optimized technical scheme of the utility model, the outer side walls of the pull rods 41 in the drag hooks 4 are respectively provided with a full oil guide groove for filling lubrication and reducing friction force.

The specific use principle is as follows: when the product 5 is subjected to injection molding and then is opened, the left slide block main body 1 and the right slide block main body 2 on the mold core side slide to two sides for a distance under the driving action of the hydraulic oil cylinder 3 arranged outside the mold core side, wherein the distance is the set length of the limiting wall space 12, so that a gap is formed between the inner side surface of the slide block main body and the outer side wall of the product 5; at this time, the drag hook 4 keeps still under the action of the top force of the nitrogen spring 7, and cannot synchronously slide outwards due to the friction force of the sliding block main body, so that the product 5 is prevented from being pulled out under the condition that the product 5 is not separated from the die. When the limiting block 43 arranged on the drag hook 4 slides in the corresponding limiting wall space 12 and abuts against one inner side wall, close to the inner side surface of the slide block main body, of the limiting wall space 12, limiting fixation is achieved, the slide block main body drives the drag hook 4 on the same side to synchronously move outwards, at the moment, the inner side upper end of the drag hook main body 42 in the drag hook 4 catches the inner side of the back-off structure 6 on the product 5, and the back-off structure pulls outwards to deform, so that the large side edge of the product 5 is separated from the mold core, and then the product 5 is demoulded by matching with the corresponding ejection structure. After the product 5 is taken out, the two slide block main bodies are reset under the drive of the corresponding side hydraulic oil cylinders 3, the drag hook 4 is contracted, and a product back-off forming space is reserved between the inner side of the drag hook main body 42 and the slide block main bodies; then the mold is abutted against the core, and the mold is closed to start the next injection molding.

The related technical features which are not described in the technical scheme of the utility model can be realized by adopting or referring to the prior art.

It should be understood that the above description is not intended to limit the utility model to the particular embodiments disclosed, but to limit the utility model to the particular embodiments disclosed, and that the utility model is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the utility model.

Claims (6)

1. A demoulding mechanism for back-off structure on product, its characterized in that: the sliding block comprises a sliding block main body, wherein a sliding groove and a spring mounting cavity are sequentially arranged at the lower part of the sliding block main body, and central axes of the sliding groove and the spring mounting cavity are coincident; a fixed plate is fixedly arranged below the sliding groove, a sliding cavity with an opening at the left end is surrounded by the fixed plate and the sliding groove, and a drag hook is movably arranged in the sliding cavity; a limiting wall space is arranged on one side wall of the sliding groove, a limiting block is detachably arranged at the inner end of the drag hook and at one side corresponding to the limiting wall space, the limiting block is arranged in the limiting wall space to slide relatively, and a product forming gap is reserved between the outer end of the drag hook and the sliding block main body and extends out of the sliding cavity; and a nitrogen spring is arranged in the spring mounting cavity, one end of the nitrogen spring props against the inner end of the drag hook, and the other end of the nitrogen spring is fixed with the slide block main body through the fixed block.

2. A release mechanism for a back-off structure on a product according to claim 1, wherein: the two sliding block main bodies are oppositely arranged, and are provided with a draw hook and a nitrogen spring; the outside of slider main part is equipped with hydraulic cylinder, and the end of piston rod in the hydraulic cylinder is connected to the slider main part and drives its slip.

3. A release mechanism for a back-off structure on a product according to claim 1, wherein: the sliding groove is arranged on the sliding block main body and corresponds to the molding position of the product back-off structure.

4. A release mechanism for a back-off structure on a product according to claim 1, wherein: the drag hook comprises a pull rod and a drag hook main body which are fixedly connected and integrally formed, wherein the shape of the drag hook main body is matched with a molding die of a back-off structure on a product, and the upper end of the inner side of the drag hook main body is propped against the back-off position of the product to be pulled and deformed; and the outer side walls of the pull rods are respectively provided with an oil guide groove.

5. The release mechanism for a back-off structure on a product of claim 4, wherein: the upper side wall of the sliding groove is provided with a limiting wall space consistent with the length direction of the sliding groove; the upper side wall of the pull rod in the drag hook is fixedly provided with a limiting block protruding upwards through a countersunk bolt, and the upper part of the limiting block is arranged in the limiting wall space.

6. A release mechanism for a back-off structure on a product according to claim 2, wherein: the setting length of the limiting wall space is equal to the interval distance between the outer side wall of the limiting wall space and the sliding block main body when the product is demoulded; when the die is opened, the sliding block main body outwards moves to a certain distance under the driving of the corresponding hydraulic oil cylinder, and the sliding block main body hangs the drag hook to synchronously outwards move, so that the product is pulled and deformed.

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