A pre-embedded insert structure for open mold foam plastic parts

Abstract

The present invention relates to a pre-embedded insert structure for an open-mold foamed plastic part, comprising a plastic part, a ball, and a connector. The ball has an elliptical axial cross-section and a circular radial cross-section. The ball is fixed to the back of the plastic part, and one end of the ball is connected to the connector via an elastic member. The angle between the radial cross-section of the ball and the plane of the plastic part is 85 to 90 degrees. Compared with the prior art, the present invention avoids pre-embedded deviation of the plastic part due to installation problems by implementing a slidable insert, thereby resolving the problems of parts being damaged by the force of the cylinder's retreat and the short operating cycle.

Description

Technical Field

[0001] The invention relates to a foaming mold insert, in particular to a pre-embedded insert structure for an open mold foaming plastic part. Background Art

[0002] Foaming molds are divided into two types: one is open mold foaming and the other is closed mold foaming.

[0003] The foaming mold requires the plastic parts to be embedded in the mold in advance. For some main materials, before the parts are produced, the mold needs to be opened and the plastic parts embedded in advance. Figure 1 shown.

[0004] However, in the subsequent process, the following accidents often occur:

[0005] 1. When the cylinder retracts and the insert retreats, the parts are displaced in the mold cavity, causing the parts to be torn by the force of the cylinder retreat.

[0006] 2. There is foaming and overflowing liquid material between the plastic parts and the mold insert installation. After the liquid material solidifies, the material accumulates more and more, eventually requiring shutdown for maintenance. Summary of the Invention

[0007] The purpose of the present invention is to provide a pre-embedded insert structure for open mold foam plastic parts. By realizing a sliding insert, the pre-embedded deviation of the plastic parts caused by installation problems is avoided, thereby solving the problems of parts being torn by the backward force of the cylinder due to the plastic parts being embedded too tightly and the short operating cycle caused by the plastic parts being embedded too loosely.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] A pre-embedded insert structure for an open mold foam plastic part includes a plastic part, a marble and a connecting part. The axial cross-section of the marble is elliptical and the radial cross-section is circular. The marble is fixed to the back of the plastic part, and one end of the marble is connected to the connecting part via an elastic part. The angle between the radial cross-section of the marble and the plane where the plastic part is located is 85 to 90 degrees.

[0010] The connecting piece is a connecting column.

[0011] The connecting piece is a headless screw.

[0012] The elastic member is a spring.

[0013] The elastic member is a spring.

[0014] The ratio of the length of the major axis to the minor axis of the axial cross section of the marble is 1.5 to 3.

[0015] The ratio of the length of the major axis to the minor axis of the axial cross section of the marble is 2.

[0016] The marbles are welded to the plastic part.

[0017] The marbles are fixed on the plastic part through a connecting belt.

[0018] The angle between the radial cross section of the marble and the plane where the plastic part is located is 90 degrees.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) By making the inserts slidable, the pre-embedded deviation of the plastic parts caused by installation problems is avoided, thereby solving the problems of parts being torn by the force of the cylinder retreating and the short operating cycle.

[0021] 2) The elastic member is a spring having elasticity at multiple radial angles, which can better avoid the occurrence of the above problems.

[0022] 3) The angle between the radial cross section of the marble and the plane where the plastic part is located is 90 degrees, which can reduce the deformation under the same stress relief amount, thereby helping to reduce the size of the insert structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the foaming mold of the present invention;

[0024] Figure 2 for Figure 1 A magnified schematic diagram of area A in the middle;

[0025] Figure 3 is a schematic diagram of the insert structure of the present invention;

[0026] Among them: 1. Plastic parts, 2. Marbles, 3. Elastic parts, 4. Connectors, 5. Cylinders, 6. Lower die sliding inserts, 7. Lower die fixed inserts, 8. Lower die. DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0028] A molded foam plastic part embedded insert structure, such as Figure 2 and Figure 3As shown, it includes a plastic part 1, a marble 2 and a connecting part 4. The axial cross-section of the marble 2 is elliptical and the radial cross-section is circular. The marble 2 is fixed to the back of the plastic part 1, and one end of the marble 2 is connected to the connecting part 4 through an elastic part 3. The angle between the radial cross-section of the marble 2 and the plane where the plastic part 1 is located is 85 to 90 degrees, and the angle between the radial cross-section of the marble 2 and the plane where the plastic part 1 is located is 90 degrees.

[0029] The connecting member 4 is a connecting column. In this embodiment, the connecting member 4 is a headless screw.

[0030] The elastic member 3 is a spring, or in another embodiment, the elastic member 3 is a spring.

[0031] The ratio of the length of the major axis to the minor axis of the axial cross section of the marble 2 is 1.5 to 3. Preferably, the ratio of the length of the major axis to the minor axis of the axial cross section of the marble 2 is 2.

[0032] The marble 2 is fixed to the plastic part 1 via a connecting belt, or as in another embodiment, the marble 2 is welded to the plastic part 1.

[0033] In summary, through optimization Figure 1 The structure of the lower mold sliding insert 6 solves the problem of the plastic part 1 and the lower mold sliding insert 6 being too tight or loose. The marble 2 can be extended or retracted by the spring. This solves the problem of the plastic part and the sliding insert being too tight or loose.

[0034] After six months of controlled trials, the results are as follows:

[0035] Yield Number of downtimes Before improvement 92％ 6 shrapnel 95％ 1 spring 99％ 0

Claims

1. A molded foam plastic part embedded insert structure, comprising a plastic part (1), characterized in that: It also includes a marble (2) and a connecting piece (4), wherein the axial cross-section of the marble (2) is elliptical and the radial cross-section is circular, the marble (2) is fixed to the back of the plastic part (1), and one end of the marble (2) is connected to the connecting piece (4) through an elastic piece (3), and the angle between the radial cross-section of the marble (2) and the plane where the plastic part (1) is located is 85 to 90 degrees; the elastic piece (3) is a spring or a spring; the marble (2) is extended or retreated by connecting the elastic piece (3), thereby solving the problem of the assembly of the plastic part (1) and the lower mold sliding insert (6) being too tight or too loose; the ratio of the length of the major axis to the minor axis of the axial cross-section of the marble (2) is 1.5 to 3.

2. The pre-embedded insert structure of a molded foam plastic part according to claim 1, characterized in that: The connecting piece (4) is a connecting column.

3. The pre-embedded insert structure of an open mold foam plastic part according to claim 2, characterized in that: The connecting piece (4) is a headless screw.

4. The pre-embedded insert structure of an open mold foam plastic part according to claim 1, characterized in that: The ratio of the length of the major axis to the minor axis of the axial cross section of the marble (2) is 2.

5. The pre-embedded insert structure of an open mold foam plastic part according to claim 1, characterized in that: The marble (2) is welded to the plastic part (1).

6. The pre-embedded insert structure of an open mold foam plastic part according to claim 1, characterized in that: The marbles (2) are fixed to the plastic part (1) via a connecting belt.

7. The pre-embedded insert structure of an open mold foam plastic part according to claim 1, characterized in that: The angle between the radial cross section of the marble (2) and the plane where the plastic part (1) is located is 90 degrees.

Images