阅读说明：本技术 一种注塑模具型腔弧弯斜顶抽芯机构 (Core-pulling mechanism for arc-bending inclined top of cavity of injection mold ) 是由 周国全 潘怡霖 徐泽开 李汉 于 2020-09-17 设计创作，主要内容包括：本发明公开一种注塑模具型腔弧弯斜顶抽芯机构,包括轨道槽块、连接杆和异形推块,轨道槽块固定安装在注塑模具的动模上,连接杆的一端通过轨道轴销滑动配合于轨道槽块的滑槽内,另一端穿过注塑模具中的斜顶块后与异形推块相连接；异形推块位于塑料成型产品的弧弯处。本发明中的注塑模具型腔弧弯斜顶抽芯机构,采用轨道块的正、反导槽引导连接杆做内抽和顶出运动来解决塑料制品外弧弯型腔处无法出模的成型问题,从而缩短产品的开发周期和降低产品的设计、制造成本。(The invention discloses an injection mold cavity arc-bending inclined ejection core pulling mechanism which comprises a track groove block, a connecting rod and a special-shaped push block, wherein the track groove block is fixedly arranged on a movable mold of an injection mold; the special-shaped push block is positioned at the arc bend of the plastic molding product. According to the injection mold cavity arc-bending inclined top core-pulling mechanism, the forward guide groove and the reverse guide groove of the track block are adopted to guide the connecting rod to perform inward pulling and ejecting movement so as to solve the problem that the outer arc-bending cavity of a plastic product cannot be subjected to mold stripping forming, so that the development period of the product is shortened, and the design and manufacturing cost of the product is reduced.)

1. The utility model provides an injection mold die cavity arc is bent to push up mechanism of loosing core to one side which characterized in that: the track groove block is fixedly arranged on a movable die of an injection mold, one end of the connecting rod is in sliding fit in a sliding groove of the track groove block through a track shaft pin, and the other end of the connecting rod penetrates through an inclined ejector block in the injection mold and then is connected with the special-shaped ejector block; the special-shaped push block is positioned at the arc bend of the plastic molding product.

2. The injection mold cavity arc-bend pitched roof core pulling mechanism according to claim 1, characterized in that: the track groove block is provided with a positive guide groove and a negative guide groove, the positive guide groove and the negative guide groove are communicated with each other to form a V-shaped groove, the lower section of the V-shaped groove is the positive guide groove, the upper section of the V-shaped groove is the negative guide groove, and the joint of the positive guide groove and the negative guide groove is a track reversal point.

3. The injection mold cavity arc-bend pitched roof core pulling mechanism according to claim 2, characterized in that: the vertical axis of the injection mold is used as a reference, the forward guide groove is obliquely arranged towards the direction close to the vertical axis, and the backward guide groove is obliquely arranged towards the direction far away from the vertical axis.

4. The injection mold cavity arc-bend pitched roof core pulling mechanism according to claim 1, characterized in that: the track groove block is fixedly installed on a movable die of the injection mold through a bolt, and the special-shaped push block is fixed at the other end of the connecting rod through a bolt.

5. The injection mold cavity arc-bend pitched roof core pulling mechanism according to claim 1, characterized in that: the connecting rod is provided with a guide sleeve, and the guide sleeve is in sliding fit with the through hole in the inclined ejector block.

6. The injection mold cavity arc-bend pitched roof core pulling mechanism according to claim 1, characterized in that: the bottom of the inclined ejector block is connected with an inclined ejector rod, and the other end of the inclined ejector rod penetrates through the movable die and then is hinged to a top plate of the injection mold.

7. The injection mold cavity arc-bend pitched roof core pulling mechanism according to claim 6, characterized in that: the inclined ejector rod is provided with a guide sleeve, and the guide sleeve is in sliding fit with the through hole in the movable die; an inclined ejection sliding seat is arranged on a top plate of the injection mold, and the other end of the inclined ejection rod is hinged to the inclined ejection sliding seat.

Technical Field

The invention relates to the technical field of injection molds, in particular to an injection mold cavity arc-bend inclined ejection core-pulling mechanism.

Background

In the existing injection mold forming method, the problem that the arc bending of the plastic product cannot be demoulded and formed is solved by mainly modifying the line clamping structure of the outer arc bending product of the plastic product or replacing the material with a metal plate and the like. These methods require redesign of the product structure, reduction of quality requirements or increase of manufacturing costs, resulting in extended development cycles and increased manufacturing costs.

Disclosure of Invention

The invention aims to provide an injection mold cavity arc-bending inclined top core-pulling mechanism, which aims to solve the problem that the outer arc-bending cavity of a plastic product cannot be subjected to demolding, so that the development period of the product is shortened, and the design and manufacturing cost of the product is reduced.

In order to achieve the purpose, the invention provides the following scheme: the invention provides an injection mold cavity arc-bending inclined ejection core pulling mechanism which comprises a track groove block, a connecting rod and a special-shaped push block, wherein the track groove block is fixedly arranged on a movable mold of an injection mold; the special-shaped push block is positioned at the arc bend of the plastic molding product.

Preferably, the track groove block is provided with a positive guide groove and a negative guide groove, the positive guide groove and the negative guide groove are communicated with each other to form a V-shaped groove, the lower section of the V-shaped groove is the positive guide groove, the upper section of the V-shaped groove is the negative guide groove, and the joint of the positive guide groove and the negative guide groove is a track reversal point.

Preferably, the vertical axis of the injection mold is used as a reference, the forward guide groove is obliquely arranged towards the direction close to the vertical axis, and the backward guide groove is obliquely arranged towards the direction far away from the vertical axis.

Preferably, the track groove block is fixedly installed on a movable die of the injection mold through a bolt, and the special-shaped push block is fixed at the other end of the connecting rod through a bolt.

Preferably, a guide sleeve is arranged on the connecting rod and is in sliding fit with the through hole in the inclined ejecting block.

Preferably, the bottom of the inclined ejector block is connected with an inclined ejector rod, and the other end of the inclined ejector rod penetrates through the movable die and then is hinged to a top plate of the injection mold.

Preferably, a guide sleeve is arranged on the oblique ejector rod and is in sliding fit with the through hole in the movable die; an inclined ejection sliding seat is arranged on a top plate of the injection mold, and the other end of the inclined ejection rod is hinged to the inclined ejection sliding seat.

Compared with the prior art, the invention has the following beneficial technical effects:

according to the injection mold cavity arc-bending inclined top core-pulling mechanism, the forward guide groove and the reverse guide groove of the track block are adopted to guide the connecting rod to perform inward pulling and ejecting movement so as to solve the problem that the outer arc-bending cavity of a plastic product cannot be subjected to mold stripping forming, so that the development period of the product is shortened, and the design and manufacturing cost of the product is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic view of a plastic molded product;

FIG. 2 is an enlarged view of a portion of FIG. 1 at D;

FIG. 3 is a structural assembly diagram of a cavity curved pitched roof core pulling mechanism;

FIG. 4 is an installation view of a core pulling mechanism for the arc-shaped top of the cavity;

FIG. 5 is a first operation diagram of the core pulling mechanism with the curved cavity and the inclined top;

FIG. 6 is a second operation diagram of the core pulling mechanism with the curved cavity and the inclined top;

FIG. 7 is a third operation diagram of the cavity arc bending inclined top core-pulling mechanism;

wherein, 1, the wire is clamped; 2, bending in an outer arc; 3, inner arc bending; 4, a track groove block; 5, reversely guiding the groove; 6 track inversion points; 7, a positive guide groove; 8, bolts; 9, a rail shaft pin; 10 connecting rods; 11, a guide sleeve; 12, a special-shaped push block; 13 moving the die insert; 14, a slanting top block; 15, a thimble; 16 a pitched roof slide; 17 a cavity; 18, moving a mold; 19 a guide sleeve; 20, an inclined ejector rod; 21, an upper top plate; 22 a lower top plate; 23 a base plate; 24, ejecting the block; 25 gate plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide an injection mold cavity arc-bending inclined top core-pulling mechanism, which aims to solve the problem that the outer arc-bending cavity of a plastic product cannot be subjected to demolding, so that the development period of the product is shortened, and the design and manufacturing cost of the product is reduced.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1 to 7, the embodiment provides an injection mold cavity arc bending inclined ejection core pulling mechanism, which includes a track groove block 4, a connecting rod 10 and a special-shaped push block 12, wherein the track groove block 4 is fixedly installed on a movable mold 18 of an injection mold, one end of the connecting rod 10 is slidably fitted in a sliding groove of the track groove block 4 through a track shaft pin 9, and the other end of the connecting rod is connected with the special-shaped push block 12 after passing through an inclined ejection block 14 in the injection mold; the special-shaped push block 12 is positioned at the arc bend of the plastic molding product. The mechanism is installed in two parts, one group is that the track groove block 4 is assembled and placed in a movable die 18 of an injection mold through a bolt 8, and the other group is that a connecting rod 10, a special-shaped push block 12 and a guide sleeve 11 are placed in an inclined ejector block 14; the two parts are connected by a rail shaft pin 9 to do inward drawing and outward pushing movement.

In this embodiment, the track groove block 4 is provided with a forward guide groove 7 and a backward guide groove 5, the forward guide groove 7 and the backward guide groove 5 are communicated with each other to form a V-shaped groove, the lower section of the V-shaped groove is the forward guide groove 7, the upper section of the V-shaped groove is the backward guide groove 5, the joint of the forward guide groove 7 and the backward guide groove 5 is a track inversion point 6, the axis of the injection mold is used as a reference, the forward guide groove 7 is obliquely arranged towards the direction close to the axis, and the backward guide groove 5 is obliquely arranged towards the direction far away from the axis. The track shaft pin 9 at one end of the connecting rod 10 can slide in the guide groove formed by the positive guide groove 7 and the negative guide groove 5.

In order to realize the connection and installation of all parts of the arc-bending inclined-ejection core-pulling mechanism of the cavity of the injection mold, in the embodiment, the track groove block 4 is fixedly installed on a movable mold 18 of the injection mold through a bolt 8, and the special-shaped push block 12 is fixed at the other end of the connecting rod 10 through the bolt 8. The guide sleeve 11 arranged on the connecting rod 10 is in sliding fit with the through hole on the inclined ejector block 14.

Further, the bottom of the inclined ejector block 14 is connected with an inclined ejector rod 20, and the other end of the inclined ejector rod 20 is hinged on an upper ejector plate 21 of the top plate of the injection mold after passing through the movable mold 18. A guide sleeve 19 is arranged on the oblique ejector rod 20, and the guide sleeve 19 is in sliding fit with a through hole in the movable die 18; an inclined top sliding seat 16 is arranged on an upper top plate 21 of the injection mold, and the other end of an inclined top rod 20 is hinged on the inclined top sliding seat 16.

The working principle of the injection mold cavity arc bending inclined top core pulling mechanism is as follows:

when the injection of the mold is finished, the injection molding machine ejects the ejection block 24 at the bottom plate 23, and the ejection block 24 pushes and pushes the lower top plate 22 and the upper top plate 21 and the cavity 17 to open the mold and to move in the Z direction; at the moment, the inclined ejector rod 20 pushes the inclined ejector block 14 to move upwards, so that the connecting rod 10 can move along with the track shaft pin 9 in the positive guide groove 7 of the track groove block 4 (as shown in fig. 3), at the moment, the plastic part inner arc bend 3 can be adhered to the inclined ejector block 14 and can be elastically deformed to be separated from the cavity outer arc bend 2 along with the inclined ejector movement (as shown in fig. 5), when the track inversion point 6 is reached, the ejection is stopped, and the cavity 17 is continuously opened to be separated from the plastic product (as shown in fig. 6).

When the mold cavity 17 is opened, the injection molding machine continues to eject the ejection block 24, the top plate is pushed to move upwards, the connecting rod 10 moves into the reverse guide groove 5 along with the track shaft pin 9 at the track reverse rotation point 6 of the track groove block 4, the special-shaped ejection block 12 moves to perform mold cavity arc-shaped inclined ejection core-pulling ejection motion, and at the moment, the plastic part adhered to the inclined ejection block 14 is ejected out along with the special-shaped ejection block 12 and separated from the inclined ejection block 14 until the ejection is finished, so that the molding and mold-ejection of the plastic part product are finished (as shown in fig. 6). When the mold is closed, the mold is kept in the original position, and the phenomenon of interference or collision cannot be generated when the original path of the action returns.

The injection mold cavity arc bending inclined top core pulling mechanism is applied to plastic products with high appearance requirement quality requirements, such as arc bending products without wire clamping 1, products needing secondary processing (electroplating or spraying), and the like, and is widely applied to household appliances and automobile injection molds.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.