CN218803667U

CN218803667U - Pressing device of double-color mold

Info

Publication number: CN218803667U
Application number: CN202222725569.7U
Authority: CN
Inventors: 孙超
Original assignee: Changchun Hengxing Group Co ltd
Current assignee: Changchun Hengxing Group Co ltd
Priority date: 2022-10-17
Filing date: 2022-10-17
Publication date: 2023-04-07
Anticipated expiration: 2032-10-17

Abstract

A pressing device of a two-color mold comprises a plurality of polyurethane springs fixed on a second color upper mold; the first color upper die and the first color lower die are matched to form a first color part of the product through injection molding; the second color lower die and the second color upper die are matched to form a second color cavity so as to form a second color part of the product through injection molding; the position of the polyurethane spring on the second color upper die corresponds to the position of the first color part, when the second color lower die and the second color upper die are closed, all the polyurethane springs are pressed to one side, close to the second color part, of the first color part, and the shape of the polyurethane spring is matched with the molded surface of the second color cavity. This is novel pushes down first color part through increasing polyurethane spring, prevents at the injection in-process that the ebonite product from receiving flexible glue injection pressure and producing and rock, improves the product surface and produces the indentation, improves product surface quality.

Description

Pressing device of double-color mold

Technical Field

The utility model relates to a technical field, especially a double-color mold's press device moulds plastics.

Background

In a two-color injection mold, a common processing method is to process a first color product, then place the first color product into a cavity of a second color product, and inject the second color product into the cavity.

For example, the mold-moving double-color mold forming is the most complex and representative one in multi-component injection molding, and the basic principle is as follows: after the first material is injected, the first material is taken out by a manipulator and put into a mold cavity of a second material, then the injection molding of the subsequent materials with the components is carried out, and finally the whole product is obtained by cooling and solidifying. The forming process is shown in fig. 6, and the step 1: closing the die; step 2: injecting a first color product; and 3, step 3: maintaining pressure, cooling and shaping; and 4, step 4: opening the mold; and 5: the thimble ejects the first color product; step 6: taking out the first color product by the mechanical arm; and 7: retracting the thimble; step 8; placing the first color product into the cavity of the second color product by a mechanical handle; step 9; closing the die; step 10: injecting a second color product; step 11: maintaining pressure, cooling and shaping; step 12: opening the mold, and taking out a product by a mechanical arm; the forming process has the advantages that: different from a common secondary injection molding form, the moving mold is double-colored on the same machine, and after a first-color product is shaped, the first-color product is placed into a second-color mold cavity after being grabbed by a manipulator, and then the second-color product injection molding is completed. The molding process effectively reduces the injection molding period and the production cost. For example, the product has the application number of CN202010219067.X, the application date of 2020 and 03 and 25, and the name of two-color mold molding equipment and two-color mold IMR molding method.

No matter how the first color product is processed, the first color product is finally subjected to injection molding of a second color material. In the injection molding stage of the second color product, the pressure during filling can push the first color product in the second color mold cavity to move and shake, and the surface of the product generates an indentation. The double-color product has indentation defects at the sealing position, namely the junction of the double-color product.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an improve double-colored mould's of double-colored product indentation press device.

In order to achieve the above object, the present invention provides the following technical solutions:

a pressing device of a two-color mold comprises a plurality of polyurethane springs fixed on a second color upper mold;

the first color upper die and the first color lower die are matched to form a first color part of the product through injection molding;

the second color lower die and the second color upper die are matched to form a second color cavity so as to form a second color part of the product through injection molding;

the polyurethane springs are located on the second color upper die and correspond to the first color part in position, when the second color upper die and the second color upper die are closed, all the polyurethane springs are pressed to one side, close to the second color part, of the first color part, and the shape of each polyurethane spring is matched with the molded surface of the second color cavity.

Furthermore, a circular groove for accommodating the polyurethane spring is formed in the second color upper die, a protrusion is arranged at the bottom of the circular groove, and a material is deducted from the top surface of the polyurethane spring to form a step matched with the protrusion in shape.

Further, the polyurethane spring is fixed on the second color upper die through a bolt.

In the technical scheme, the utility model provides a pair of press device has following beneficial effect:

by increasing the circumferential direction that the polyurethane spring presses the first color part and increasing the polyurethane spring on the upper die of the die to press the first color product, the appearance defect caused by the movement of the first color product during the injection molding of the second color product is eliminated.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.

Fig. 1 is a schematic structural view of a pressing device disclosed by the present invention;

fig. 2 is a schematic structural view of a first color part disclosed in the present invention;

FIG. 3 is a schematic structural view of a second color portion of the present disclosure;

fig. 4 is a schematic top view of the pressing device of the present invention;

fig. 5 is a schematic structural view of a polyurethane spring according to the present disclosure;

fig. 6 is a schematic structural diagram of a two-color mold according to the prior art.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 5, a pressing device of a two-color mold comprises a plurality of polyurethane springs 1 fixed on a second color upper mold 6;

the first color upper die and the first color lower die are closed to form a first color part 3 of the product through injection molding;

the second color lower die 5 and the second color upper die 6 are matched to form a second color cavity so as to injection mold a second color part 4 of the product;

the polyurethane spring 1 is located on the second color upper die 6 at a position corresponding to the position of the first color portion 3, in the circumferential direction of the first color portion 3, and near the boundary of the second color product. When the second color lower mold 5 and the second color upper mold 6 are closed, all the urethane springs 1 are pressed to the side of the first color portion 3 close to the second color portion 4, that is, to the vicinity of the sealing position. And the shape of the polyurethane spring 1 matches the profile of the second color cavity. That is, the side of the polyurethane spring 1 facing the second color cavity is formed by copying with reference to the shape of the product. The surface shape of the further polyurethane spring matches the shape of the first coloured part 3.

In the injection molding stage of the second color product, the pressure during filling can push the first color part 3 in the second color mold cavity to move and shake, and the surface of the product generates an indentation. Placing the polyurethane spring in the periphery of the first color part 3 in the second color mold cavity and compressing the first color part 3, when the second color part 4 is filled, the first color part 3 reduces and shakes under the clamping of the polyurethane spring and the mold cavity, eliminates the product appearance defect, and promotes the product yield. The first color portion 3 of the fender panel product shown in fig. 2 is elongated, and the second color portion 4 of the fender panel product shown in fig. 3 is a hollow annular structure, and the urethane springs 1 are disposed in the circumferential direction of the first color portion 3.

Preferably, the second color upper mold 6 is provided with a circular groove 2 for accommodating the polyurethane spring 1, the bottom of the circular groove is provided with a protrusion, and the top surface of the polyurethane spring 1 close to the circular groove deducts material to form a step matched with the shape of the protrusion. Namely, a round bottom surface of the polyurethane spring 1 which is integrally cylindrical and close to the second color upper die 6 is vertically cut along the axial direction of the cylinder; then, a knife is transversely cut on the side surface of the cylinder, and the material is deducted after the cutting directions of the two knives are intersected at 90 degrees. The bulge and the step form a similar concave spigot, the step is attached to the bulge, and the shape of the outer surface of the polyurethane spring 1 is irregular and needs to change along with the shape of the upper surface of a product. The design facilitates the rapid circumferential positioning of the polyurethane spring 1 and has the function of preventing reverse.

Preferably, the polyurethane spring 1 is fixed to the second color upper die 6 by bolts. The axis of the polyurethane spring 1 is provided with a bolt in a penetrating manner, and the polyurethane spring 1 is screwed on the second color upper die 6 by the bolt.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. A pressing device of a two-color mold is characterized by comprising a plurality of polyurethane springs fixed on a second color upper mold;

the polyurethane springs are located on the second color upper die and correspond to the first color part in position, when the second color lower die and the second color upper die are closed, all the polyurethane springs are pressed to one side, close to the second color part, of the first color part, and the surface shapes of the polyurethane springs are matched with the molded surface of the second color cavity.

2. The pressing device of the two-color mold according to claim 1, wherein the second color upper mold is provided with a circular groove for accommodating the polyurethane spring, a protrusion is arranged at the bottom of the circular groove, and a material is deducted from the top surface of the polyurethane spring close to the circular groove to form a step matching with the shape of the protrusion.

3. The pressing device of the two-color mold according to claim 2, wherein the polyurethane spring is fixed on the second upper color mold by a bolt.

4. The pressing device of a two-color mold according to claim 1, wherein the surface shape of the polyurethane spring matches the shape of the first color part.