CN211941927U

CN211941927U - Mold demolding structure for products with inverted periphery

Info

Publication number: CN211941927U
Application number: CN202020174763.9U
Authority: CN
Inventors: 殷剑; 徐军; 张建
Original assignee: Suzhou Mobi Inton Intelligent System Co ltd
Current assignee: Suzhou Mobi Inton Intelligent System Co ltd
Priority date: 2020-02-17
Filing date: 2020-02-17
Publication date: 2020-11-17
Anticipated expiration: 2030-02-17

Abstract

The utility model provides a mold demoulding structure of a product with a periphery reverse buckle, which comprises an upper mold, a lower mold and an insert; the upper die is arranged above the lower die; the insert is arranged in the lower die; the implant comprises a main body part, wherein the main body part is provided with a first peripheral part and a second peripheral part, the second peripheral part is arranged on the inner side of the first peripheral part, and the first peripheral part and the second peripheral part form a step-shaped structure; the first peripheral part is embedded with the inner side of the peripheral inverted product; the second peripheral part inclines towards the inner side of the main body part and has a demoulding angle; the main body part is provided with a convex edge, and the convex edge is provided with a first guide pillar hole; a second guide pillar hole is formed in one side, opposite to the first guide pillar hole, of the main body part; the main body part and the convex edge are provided with a plurality of concave parts corresponding to the inverted buckling positions of the periphery of the formed product. The utility model discloses an add the son in the mould for border back-off product, can realize the drawing of patterns of mould through demolising the son after the mould die sinking, replaced the oblique top drawing of patterns mode of conventional back-off product, the drawing of patterns can be smooth to effectively reduce the deckle edge of product, promote product quality.

Description

Mold demolding structure for products with inverted periphery

Technical Field

The utility model relates to an injection mold field especially relates to a mold demoulding structure of border back-off product.

Background

The injection molding process is a process for manufacturing a product with a certain shape by pressurizing, injecting, cooling, separating and the like molten raw materials. The injection molding process of the plastic part mainly comprises the stages of mold closing, filling, pressure maintaining, cooling, mold opening, mold stripping and the like.

In the injection molding process, the demolding mechanism is mainly responsible for demolding a cooled and solidified plastic part from a mold, and is also called as an ejection mechanism, and the main modes include thimble demolding, push plate demolding, oblique ejection demolding and the like.

In the development process of an injection mold, for a product containing a reverse buckle, the conventional mold structure is used for performing inclined top demolding; as shown in fig. 1, in a mobile communication product such as a housing 5 of a smart phone or a personal digital assistant, in order to facilitate fixing and assembling of internal parts, a plurality of inverted buckle structures 51 are provided around the housing 5 and on the upper and lower surfaces of the housing, and for such products with inverted buckles on their circumferences, especially on their two surfaces, an inclined thimble (shoulder is called as inclined thimble) structure as shown in fig. 2 is generally adopted for molding and demolding; because the back-off is deeper and more, especially for the plastic shell forming part with smaller overall height like a Personal Digital Assistant (PDA) or a smart phone, although the size of the plastic shell is small, in order to ensure the demoulding, the length of the inclined top is longer, which causes the size of the mould to be larger, and the demoulding success is difficult to ensure by using the inclined top; in addition, from the angle of product molding, because the shell of the product is generally made of plastic and TPU (thermoplastic polyurethane) materials through double-color injection molding, the burr of the TPU is difficult to control through inclined top demolding, more burrs are likely to be generated on the product, the product quality is affected or the manual burr removing process during part molding is increased, and the processing cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that exists among the prior art, and the mould demoulding structure of a border back-off product that proposes can reduce the mould size, guarantees the shaping quality of product moreover.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a mold demoulding structure of a product with a periphery reversed buckle comprises an upper mold, a lower mold and an insert; the upper die is arranged above the lower die; the insert is arranged in the lower die; the implant comprises a main body part, wherein the main body part is provided with a first peripheral part and a second peripheral part, the second peripheral part is arranged on the inner side of the first peripheral part, and the first peripheral part and the second peripheral part form a step-shaped structure; the first peripheral part is embedded with the inner side of the peripheral inverted product; the second peripheral part inclines towards the inner side of the main body part and has a demoulding angle; the main body part is provided with a convex edge, and the convex edge is provided with a first guide pillar hole; a second guide pillar hole is formed in one side, opposite to the first guide pillar hole, of the main body part; the main body part and the convex edge are provided with a plurality of concave parts corresponding to the inverted buckling positions of the periphery of the formed product.

Preferably, the first guide post hole is provided at one end of the main body, and the second guide post hole is provided at the other end of the main body.

Preferably, a protrusion is disposed on a side surface of the main body portion close to the upper die, and the protrusion is disposed in the middle of the main body portion.

Preferably, the bump is provided with a first through hole; a plurality of second through holes are formed around the bump.

Compared with the prior art, the utility model has the advantages that the mold is demolded by removing the insert after the mold is opened by adding the insert into the mold of the product with the periphery reversed buckle, the oblique top demolding mode of the conventional product with the reversed buckle is replaced, the mold can be smoothly demolded, the burrs of the product are effectively reduced, and the product quality is improved; through the second peripheral part, the insert can be conveniently detached from the formed peripheral inverted product; the first guide post hole and the second guide post hole can guide the insert to be detached, and the insert is conveniently and stably detached.

Drawings

FIG. 1 is a schematic structural view of a part formed by a mold release structure of the present invention;

FIG. 2 is a schematic structural view of a conventional lifter demolding structure for forming a circumferential inverted product and a lifter;

fig. 3 is a schematic structural view of an insert of a mold release structure according to an embodiment of the present invention;

fig. 4 is a schematic structural view of an insert and a lower die of a die releasing structure according to an embodiment of the present invention;

wherein, the component names and the labels are as follows:

the mold comprises a mold insert 1, a lower mold 2, a first peripheral part 11, a second peripheral part 12, a main body part 13, a convex edge 14, a first guide pillar hole 141, a second guide pillar hole 142, a convex block 131, a first through hole 132, a second through hole 133, an inclined top 4 and a periphery reverse buckling product 5.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.

Referring to fig. 3 and 4, the present invention provides a mold stripping structure for a product with a periphery reversed buckle, which includes an upper mold (not shown), a lower mold 2 and an insert 1; the upper die is arranged above the lower die 2; the insert 1 is arranged in the lower die 2. The embodiment of the utility model provides an in, go up mould and 2 moulds earlier and put into lower mould 2 with going into son 1.

The insert 1 comprises a main body part 13, wherein the main body part 13 is provided with a first peripheral part 11 and a second peripheral part 12, the second peripheral part 12 is arranged inside the first peripheral part 11, and the two parts form a step-shaped structure; the first periphery 11 is embedded with the inner side of the periphery inverted product 5; the second peripheral part 12 inclines towards the inner side direction of the main body part 13 to form a demoulding angle, so that the insert 1 can be conveniently detached from the formed peripheral reverse-buckled product 5; the main body 13 is provided with a convex edge 14, and the convex edge 14 is provided with a first guide pillar hole 141; a second guide post hole 142 is provided on a side of the main body portion 13 opposite to the first guide post hole 141. The main body 13 and the flange 14 are provided with a plurality of recesses 135 at positions corresponding to the inverted portions of the circumference of the molded product.

Further, a first guide post hole 141 is provided at one end of the main body portion 13; the second guide post hole 142 is provided at the other end of the main body portion 13. The embodiment of the utility model provides an in, first guide post hole 141 and second guide post hole 142 can be for going into son 1 and demolish and do the direction, do benefit to and surely follow the lower mould and tear out with going into son 1.

Further, a side of the main body 13 close to the upper die is provided with a bump 131, and the bump 131 is provided in the middle of the main body 13. The embodiment of the utility model provides an in, through lug 131 with last mould gomphosis for it is accurate to fix a position when going up mould and 2 compound dies of lower mould.

Further, a first through hole 132 is disposed on the bump 131; a plurality of second through holes 133 are provided around the bump 131. In the embodiment of the present invention, the insert 1 is installed and removed through the first through hole 132 and the second through hole 133; and the exhaust is facilitated, the injection pressure and the injection time can be greatly reduced, and the product molding is facilitated.

The utility model discloses mold demoulding structure's of border back-off product working process: the insert 1 is placed into the lower die 2, the upper die and the lower die 2 are closed, the molten raw material is injected into the die, and the injection die is subjected to heat preservation, pressure maintaining and cooling; molding a periphery inverted product 5; the upper die and the lower die 2 are separated, and the insert 1 and the products 5 which are reversely buckled on the periphery of the insert 1 are taken out; and taking the products 5 with the inverted circles off the insert 1 to finish demoulding.

The utility model discloses an add the insert in the mould for the border back-off product, can realize the drawing of patterns of mould through demolising the insert after the mould die sinking, replaced the oblique top drawing of patterns mode of conventional back-off product, can demold smoothly to effectively reduce the deckle edge of product, promote product quality; through the second peripheral part, the insert can be conveniently detached from the formed peripheral inverted product; the first guide post hole and the second guide post hole can guide the insert to be detached, and the insert is conveniently and stably detached.

The present invention has been described in relation to the above embodiments, which are only examples for implementing the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, all changes and modifications which do not depart from the spirit and scope of the present invention are deemed to fall within the scope of the present invention.

Claims

1. A mold demolding structure of a product with a periphery reversed buckle is characterized by comprising an upper mold, a lower mold and an insert; the upper die is arranged above the lower die; the insert is arranged in the lower die; the implant comprises a main body part, wherein the main body part is provided with a first peripheral part and a second peripheral part, the second peripheral part is arranged on the inner side of the first peripheral part, and the first peripheral part and the second peripheral part form a step-shaped structure; the first peripheral part is embedded with the inner side of the peripheral inverted product; the second peripheral part inclines towards the inner side of the main body part and has a demoulding angle; the main body part is provided with a convex edge, and the convex edge is provided with a first guide pillar hole; a second guide pillar hole is formed in one side, opposite to the first guide pillar hole, of the main body part; the main body part and the convex edge are provided with a plurality of concave parts corresponding to the inverted buckling positions of the periphery of the formed product.

2. The mold release structure for a circumferential reverse buckle product of claim 1, wherein said first guide post hole is provided at one end of said main body portion and said second guide post hole is provided at the other end of said main body portion.

3. The mold release structure for a circumferential reversed product according to claim 1 or 2, wherein a projection is provided on a side surface of the main body portion adjacent to the upper mold, the projection being provided in a middle portion of the main body portion.

4. The mold release structure for a circumferential reverse-buckled product according to claim 3, wherein said projection is provided with a first through hole; a plurality of second through holes are formed around the bump.