CN116080000A - Rib adhesion prevention mold and demolding process thereof - Google Patents

Abstract

The invention discloses an anti-rib adhesion mold, which comprises a mold cavity side and a mold core side, wherein an injection molding groove corresponding to a plastic product is formed in the front side of a large slide block on the mold core side, a plurality of lower slide block cavities are arranged side by side on the side surface facing the mold cavity side, and a plurality of containing grooves corresponding to the lower slide block cavities are arranged side by side on the side wall of the rib injection molding groove; the small sliding blocks are slidably mounted in the cavity of each lower sliding block and comprise a main body and injection molding blocks which are fixedly connected, the injection molding blocks are arranged in the containing grooves, and rib injection molding grooves are formed in the front sides of the injection molding blocks or not. The side of the die cavity is provided with a plurality of upper slide block cavities corresponding to the lower slide block cavities side by side, and the rear side wall of the upper slide block cavity is provided with a protruding column extending downwards. The invention has simple assembly structure, is beneficial to completely taking out plastic products in the mold opening and demolding process by the relative sliding of the small sliding blocks, effectively prevents the adhesion and fracture of the ribs, ensures the integrity of all the ribs and improves the quality of products.

Description

Rib adhesion prevention mold and demolding process thereof

Technical Field

The invention relates to the technical field of injection molds, in particular to a rib adhesion preventing mold and a demolding process thereof.

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; with the popularization and application of plastic products in the industries of aviation, aerospace, electronics, machinery, ships, automobiles and the like, the requirements on the plastic products are higher and higher, and the injection mold is important technological equipment for producing various plastic industrial products and is also a tool for endowing the plastic products with complete structures and accurate dimensions. The injection mold mainly comprises a pouring system, a temperature regulating system, a molding part and a structural part, and can be used for processing a series of plastic products with different shapes and different sizes. Injection molding is a processing method used in mass production of parts with complex shapes; the method specifically comprises the steps of injecting heated and melted plastic into a die cavity formed by buckling a movable die and a fixed die through an injection molding machine at high pressure, and cooling and solidifying to obtain a formed product; the shape of the mold determines the shape of the products and the quality and accuracy of the mold processing determines the quality of the products. Because the demand of product processing often has intensive rib on some plastic products, when the shaping die sinking, in movable mould and cover half separation process, the rib package produces the adhesion between easy and the injection mold slider in the shaping slider, leads to final plastic products inconvenient taking out, destroys product quality.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provides a rib adhesion preventing die and a demolding process thereof.

In order to solve the technical problems, the invention adopts the following technical scheme: the rib adhesion prevention die comprises a die cavity side and a die core side, wherein an inclined guide post is fixedly arranged on the die cavity side, a guide post hole corresponding to the inclined guide post is formed in a large sliding block on the die core side, and the inclined guide post is accommodated in the guide post hole and drives the large sliding block to slide relatively along the inclined guide post.

The front side of the large slide block in the mold core side is provided with an injection molding groove corresponding to a plastic product, the side surface of the large slide block facing the mold cavity side is provided with a plurality of lower slide block cavities side by side, the side wall provided with the rib injection molding groove is provided with a plurality of containing grooves corresponding to the lower slide block cavities side by side, and the rear end of the containing groove is communicated with the corresponding lower slide block cavity; the small sliding blocks are slidably mounted in the cavity of each lower sliding block and comprise a main body and injection molding blocks which are fixedly connected, the injection molding blocks are arranged in the corresponding accommodating grooves, and rib injection molding grooves are formed in the front sides of the injection molding blocks or not.

The side of the die cavity is provided with a plurality of upper slide block cavities corresponding to the lower slide block cavities side by side, and the rear side wall of the upper slide block cavity is provided with a protruding column extending downwards.

Further, the left side and the right side of the bottom of the lower sliding block cavity are respectively and fixedly provided with a fixed block, the fixed blocks are mutually symmetrical, and a sliding groove is formed between the fixed block and the bottom surface of the lower sliding block cavity; and a stop block is fixedly arranged at the rear side of the bottom of the lower sliding block cavity.

Further, the two sides of the lower end of the main body in the small sliding block are provided with side wings which are respectively correspondingly arranged in the sliding groove and can slide along the sliding groove; the front side of main part is equipped with the spring installation cavity in the little slider, internally mounted has compression spring, and compression spring's one end supports the inner wall in spring installation cavity, and the other end supports on the front side inner wall in slider chamber down.

Further, the top edge of the main body in the small sliding block is arranged in a chamfering way, the front edge and the rear edge are in a large C angle, and the lower part of the rear side wall of the main body in the small sliding block is arranged in a straight surface.

Further, the accommodating groove is in a front-wide and rear-narrow shape, and the injection molding block is matched with the accommodating groove and is in a front-wide and rear-narrow structure; the upper end face of the injection molding block is flush with the upper end face of the accommodating groove.

Preferably, the front side of the injection molding block is provided with at most 3 rib injection molding grooves.

Further, a detachable grinding and matching piece is arranged between the front side surface of the small sliding block main body and the inner wall of the front side of the lower sliding block cavity, and the small sliding block main body is detached during injection molding of a die; the thickness of the detachable lapping piece is 5 mm.

Further, the front side surface of the protruding column arranged at the die cavity side is a straight surface, and the bottom end of the protruding column is provided with a chamfer angle and can be adaptively inserted into an interlayer between the rear side surface of the main body in the small sliding block and the rear side wall of the lower sliding block cavity; the upper slider cavity accommodates the upper portion of the small slider middle body.

Further, an oil filling groove is further arranged at the bottom of the lower sliding block cavity.

The invention also claims an anti-adhesion demolding process, which adopts the rib adhesion preventing mold and comprises the following steps:

s1, during molding and die sinking, a die core side is separated from a die cavity side, a large sliding block is separated from the die cavity side backwards under the action of an inclined guide post, at the moment, a protruding column arranged on the die cavity side is still inserted into an interlayer between a small sliding block and the inner wall of the rear side of a lower sliding block cavity, a straight position surface at the front side of the protruding column is contacted with a straight surface at the rear side of a main body in the small sliding block, the small sliding block is pushed to be in situ, and the front side of an injection molding block in the small sliding block is still propped against a product; because a crack is reserved between the front side surface of the main body in the small slide block and the front side inner wall of the lower slide block cavity, the large slide block is separated from the injection molding product backwards relatively;

s2, separating the upper rib injection groove of the large slide block from the upper rib of the product;

s3, the large slide block continuously slides backwards, the protruding column at the mold cavity side slowly breaks away from the interlayer, the protruding column moves along the upper inclined plane of the main body in the small slide block, the small slide block slowly slides backwards under the action of the compression spring, the front side face of the injection molding block in the small slide block breaks away from a product, and demolding of the whole product is completed.

Compared with the prior art, the invention has the following beneficial effects: the invention has simple assembly structure, is beneficial to completely taking out plastic products in the molding, die opening and demolding process, effectively prevents the adhesion and fracture of the ribs, ensures the integrity of all the ribs and improves the quality of the whole product.

Drawings

FIG. 1 is a partial block diagram of a product of a plastic article;

FIG. 2 is a schematic view of a portion of the construction of a release mold of the present invention;

FIG. 3 is a top view of the structure of FIG. 2;

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

FIG. 5 is a schematic view of a portion of the side of a mold cavity in the present invention;

FIG. 6 is an enlarged bottom view of portion C of FIG. 5;

FIG. 7 is a schematic view of a large slider portion of the present invention;

FIG. 8 is a top view of the structure of FIG. 7;

FIG. 9 is a cross-sectional view in the direction B-B in FIG. 8;

FIG. 10 is an enlarged view of portion D of FIG. 7;

FIG. 11 is a schematic view of the structure of a small slider portion of the present invention;

FIG. 12 is a schematic view of the structure of FIG. 10 with the small slider removed;

in the figure: 1. the side of the die cavity comprises 2 parts of large slide blocks, 3 parts of plastic products, 4 parts of ribs, 5 parts of inclined guide columns, 6 parts of small slide blocks, 11 parts of upper slide block cavities, 12 parts of protruding columns, 21 parts of large slide block front ends, 22 parts of rib injection molding groove side walls, 23 parts of lower slide block cavities, 24 parts of fixed blocks, 25 parts of stop blocks, 26 parts of oil filling grooves, 27 parts of containing grooves, 28 parts of rib injection molding grooves, 61 parts of main bodies, 62 parts of injection molding blocks, 63 parts of compression springs, 64 parts of detachable grinding and matching sheets, 65 parts of large C-angle structures.

Detailed Description

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

It should be further noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, 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 invention will be understood in specific cases by those of ordinary skill in the art.

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

as shown in fig. 2 to 4, an anti-rib adhesion mold comprises a mold cavity side 1 and a mold core side, wherein an inclined guide pillar 5 is fixedly installed on the mold cavity side 1, a guide pillar hole corresponding to the inclined guide pillar 5 is formed in the rear end of a large slide block 2 in the mold core side, the inclined guide pillar 5 is accommodated in the corresponding guide pillar hole, and the large slide block 2 can be driven to slide along the inclined guide pillar 5, so that mold buckling and mold opening actions are completed. The mold is mainly used for producing and processing the plastic product 3 shown in fig. 1, wherein a plurality of ribs 4 are arranged at the E part of the plastic product 3 due to processing design, and rib injection grooves 28 arranged on the large slide block 2 are adopted for injection molding ribs 4, but adhesion phenomenon is easy to occur between the ribs 4 and the mold due to the fact that the ribs 4 are large in number and small in thickness, and demolding fracture occurs. In order to solve this problem, a plurality of small sliders 6 capable of sliding relatively are provided on the large slider front end 21 of the large slider 2, as shown in fig. 7.

As shown in fig. 7 to 12, the front end surface of the large slide block 2 is provided with a corresponding injection molding groove of the plastic product 3; the rib injection molding grooves 28 corresponding to the ribs 4 in the plastic product 3 are arranged on the rib injection molding groove side wall 22 above the front end 21 of the large slide block side by side, and a plurality of lower slide block cavities 23 are arranged at the back of the rib injection molding groove side wall 22 side by side and at equal intervals; the rib injection molding groove side wall 22 is provided with a corresponding accommodating groove 27 corresponding to the lower slide block cavity 23, and is communicated with the lower slide block cavity 23 at the corresponding position, and the accommodating groove 27 is arranged in a shape of being wide in front and narrow in back.

As shown in fig. 12, the cross section of the lower slider cavity 23 is in a convex shape, the left and right sides of the bottom surface of the lower slider cavity are respectively provided with a fixed block 24 through countersunk bolts, the fixed blocks 24 are symmetrical with each other, and a sliding groove is formed between the fixed block 24 and the bottom surface; the bottom of the lower slide block cavity 23 is fixedly provided with a high-force brass oil filling groove 26, and the rear side of the bottom surface of the lower slide block cavity 23 is fixedly provided with a stop block 25 through a countersunk bolt and positioned at a protruding position in a convex shape. A small slide block 6 is arranged in each lower slide block cavity 23, and referring to fig. 11, the small slide block 6 comprises a main body 61 and an injection molding block 62, the main body 61 and the injection molding block 62 are fixedly connected through a countersunk bolt, and the injection molding block 62 is positioned at the front side of the main body 61; simultaneously, two detachable grinding and matching pieces 64 are symmetrically arranged on the lower half part of the front side surface of the main body 61; the left and right sides of the bottom end of the main body 61 are respectively provided with protruding flanks, which are symmetrical to each other. When the small slide block 6 is arranged in the corresponding lower slide block cavity 23, according to actual assembly requirements, after the positions of all components are fixed in a matched manner, the two detachable grinding and matching pieces 64 are removed, and at the moment, two side wings arranged at the bottom end of the main body 61 in the small slide block 6 are respectively and slidably arranged in corresponding sliding grooves formed by the fixed block 24 and the bottom surface; the injection molding blocks 62 are accommodated in the corresponding accommodating grooves 27 on the rib injection molding groove side walls 22, and the upper end surfaces of the injection molding blocks are level with the upper end surfaces of the accommodating grooves 27; a gap of 5 mm is left between the front side surface of the main body 61 in the small slider 6 and the front side inner wall of the lower slider cavity 23. The front side of the main body 61 in the small slide block 6 is also provided with a spring mounting cavity, which is positioned below the injection molding block 62, a compression spring 63 is arranged in the small slide block, one end of the compression spring 63 props against the inner side wall of the spring mounting cavity, and the other end of the compression spring 63 props against the inner wall of the front side of the lower slide block cavity 23. The front end face of the injection molding block 62 in the small sliding block 6 is provided with a corresponding rib injection molding groove 28 or is not provided (when the width of the injection molding block 62 is just positioned in the middle of two adjacent ribs 4); and the number of the rib injection molding grooves 28 arranged on the small slide block 6 is not more than 3 at most so as to avoid adhesion between the small slide block 6 and the plastic product 3.

The top edges of the main body 61 in the small slide block 6 are all chamfered, wherein the upper front edge is in a large C-angle structure 65, and the upper rear edge is in a large inclined plane; the lower half of the main body 61 has a columnar structure, and the rear side surface is a straight surface. Corresponding to the top of the main body 61 and for adapting and accommodating, a plurality of upper slide cavities 11 corresponding to the lower slide cavities 23 are formed on the side surface of the mold cavity side 1 facing the large slide 2, as shown in fig. 5 and 6, protruding columns 12 extending downwards are arranged at the rear side edges of the upper slide cavities 11, wherein the front side surfaces of the protruding columns 12 are straight surfaces, and the bottom end edges of the protruding columns 12 are chamfered. During die assembly, the protruding column 12 is inserted into an interlayer formed by the small slide block 6 and the rear side inner wall of the lower slide block cavity 23, and the sliding of the small slide block 6 is limited.

The demolding process for the rib adhesion prevention mold comprises the following steps of:

first, when the injection mold is closed, the mold cavity side 1 and the mold core side are buckled, the small slide block 6 is accommodated in the lower slide block cavity 23 and the upper slide block cavity 11, the front side surface of the injection molding block 62 in the small slide block 6 is flush with the front side surface of the rib injection molding groove side wall 22, and then the injection molding is performed, the cooling molding is performed, and the demolding is performed.

During demolding, the mold core side is separated from the mold cavity side 1, the large slide block 2 moves backwards under the action of the inclined guide post 5, the front end 21 of the large slide block gradually breaks away from the plastic product 3, the side wall 22 of the rib injection molding groove is driven to be far away from the plastic product 3, and the rib 4 breaks away from the rib injection molding groove 28; at this time, since the stud 12 provided on the mold cavity side 1 is still inserted into the interlayer formed between the main body 61 in the small slide 6 and the rear inner wall of the lower slide cavity 23, the front straight surface of the stud 12 is in contact with the rear straight surface of the main body 61 in the small slide 6, and the small slide 6 is not slid backward along with the large slide 2, and the front side surface of the injection block 62 in the small slide 6 is still in contact with the plastic product 3; since a gap is left between the front side surface of the main body 61 of the small slide 6 and the front side inner wall of the lower slide cavity 23, only the large slide 2 moves backward to release the mold, thereby assisting the detachment of most of the ribs 4 from the rib injection molding groove 28.

Then, the large slide block 2 continues to slide backwards, the protruding column 12 on the die cavity side 1 slowly breaks away from the interlayer, moves along the inclined surface of the rear side of the upper half part of the main body 61, and after the small slide block 6 breaks away from the straight surface limiting function, slowly slides backwards under the action of the compression spring 63, so as to drive the injection molding block 62 to break away from the plastic product 3, and complete demolding of the ribs 4 on the whole plastic product 3.

When the injection molding die is closed for a new subsequent round, due to the arrangement of the large C-angle structure 65 at the top end of the main body 61 in the small slide block 6, the normal die closing under the condition that the compression spring 63 is invalid and the small slide block 6 cannot be reset can be avoided, at the moment, the front lower edge of the upper slide block cavity 11 can slide tightly against the large C-angle structure 65, the small slide block 6 is pushed backwards, the sliding distance of the small slide block 6 is limited by the stop block 25, and the small slide block 6 is accommodated in the lower slide block cavity 23 and the upper slide block cavity 11 again, so that the die closing is completed.

The arrangement of the small slide block structure in the mold can be also suitable for demolding the mold with more ribs 4 in the plastic product 3; meanwhile, the related technical characteristics which are not described in the invention 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 invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention 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 invention.

Claims (10)

1. The utility model provides an anti-sticking strip adhesion mould which characterized in that: the large slide block in the mold core side is provided with a guide column hole corresponding to the inclined guide column, and the inclined guide column is accommodated in the guide column hole and drives the large slide block to slide relatively along the inclined guide column;

the front side of the large slide block in the mold core side is provided with an injection molding groove corresponding to a plastic product, the side surface of the large slide block facing the mold cavity side is provided with a plurality of lower slide block cavities side by side, the side wall provided with the rib injection molding groove is provided with a plurality of containing grooves corresponding to the lower slide block cavities side by side, and the rear end of the containing groove is communicated with the corresponding lower slide block cavity; each lower slider cavity is internally provided with a small slider in a sliding manner, each small slider comprises a main body and an injection molding block which are fixedly connected, the injection molding blocks are arranged in the corresponding accommodating grooves, and rib injection molding grooves are arranged on the front sides of the injection molding blocks or not;

the side of the die cavity is provided with a plurality of upper slide block cavities corresponding to the lower slide block cavities side by side, and the rear side wall of the upper slide block cavity is provided with a protruding column extending downwards.

2. The rib adhesion preventing mold according to claim 1, wherein: the left side and the right side of the bottom of the lower sliding block cavity are respectively and fixedly provided with a fixed block, the fixed blocks are mutually symmetrical, and a sliding groove is formed between the fixed block and the bottom surface of the lower sliding block cavity; and a stop block is fixedly arranged at the rear side of the bottom of the lower sliding block cavity.

3. The rib adhesion preventing mold according to claim 2, wherein: the two sides of the lower end of the main body in the small sliding block are provided with side wings which are respectively correspondingly arranged in the sliding grooves and can slide along the sliding grooves; the front side of main part is equipped with the spring installation cavity in the little slider, internally mounted has compression spring, and compression spring's one end supports the inner wall in spring installation cavity, and the other end supports on the front side inner wall in slider chamber down.

4. The rib adhesion preventing mold according to claim 1, wherein: the top edge of the main body in the small sliding block is chamfered, the front edge and the rear edge are large C angles, and the lower part of the rear side wall of the main body in the small sliding block is in straight surface.

5. The rib adhesion preventing mold according to claim 1, wherein: the accommodating groove is in a front-wide and rear-narrow shape, and the injection molding block is matched with the accommodating groove and is in a front-wide and rear-narrow structure; the upper end face of the injection molding block is flush with the upper end face of the accommodating groove.

6. The rib adhesion preventing mold according to claim 1, wherein: the front side of the injection molding block is provided with at most 3 rib injection molding grooves.

7. The rib adhesion preventing mold according to claim 1, wherein: a detachable grinding and matching piece is arranged between the front side surface of the small slide block main body and the inner wall of the front side of the lower slide block cavity, and is removed during injection molding of the die; the thickness of the detachable lapping piece is 5 mm.

8. The rib adhesion preventing mold according to claim 1, wherein: the front side surface of the protruding column arranged at the die cavity side is a straight surface, and the bottom end of the protruding column is provided with a chamfer angle and can be adaptively inserted into an interlayer between the rear side surface of the main body in the small sliding block and the rear side wall of the lower sliding block cavity; the upper slider cavity accommodates the upper portion of the small slider middle body.

9. The rib adhesion preventing mold according to claim 1, wherein: and the bottom of the lower sliding block cavity is also provided with an oil filling groove.

10. An anti-adhesion demolding process, which adopts the rib adhesion preventing mold as claimed in any one of claims 1 to 9, and is characterized by comprising the following steps:

s1, during molding and die sinking, a die core side is separated from a die cavity side, a large sliding block is separated from the die cavity side backwards under the action of an inclined guide post, at the moment, a protruding column arranged on the die cavity side is still inserted into an interlayer between a small sliding block and the inner wall of the rear side of a lower sliding block cavity, a straight position surface at the front side of the protruding column is contacted with a straight surface at the rear side of a main body in the small sliding block, the small sliding block is pushed to be in situ, and the front side of an injection molding block in the small sliding block is still propped against a product; because a crack is reserved between the front side surface of the main body in the small slide block and the front side inner wall of the lower slide block cavity, the large slide block is separated from the injection molding product backwards relatively;

s2, separating the upper rib injection groove of the large slide block from the upper rib of the product;

s3, the large slide block continuously slides backwards, the protruding column at the mold cavity side slowly breaks away from the interlayer, the protruding column moves along the upper inclined plane of the main body in the small slide block, the small slide block slowly slides backwards under the action of the compression spring, the front side face of the injection molding block in the small slide block breaks away from a product, and demolding of the whole product is completed.

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