Packaging mold assembly for steering wheel switch PCBA

Abstract

The utility model discloses a packaging mould assembly for a steering wheel switch PCBA (printed circuit board assembly), which comprises an inner mould and an outer mould, the inner mould is I-shaped, the outer mould is U-shaped, the inner mould is provided with a one-step forming cavity for packaging and forming the PCBA, two sides of the one-step forming cavity are provided with pick-and-place openings, and the pick-and-place openings are communicated with the one-step forming cavity. The outer mold is detachably connected to the inner mold, and a secondary forming cavity used for PCBA packaging forming is formed between the outer mold and the inner mold. The inner mold and the outer mold are both made of soft materials.

Description

TECHNICAL FIELD

[0001] The utility model belongs to encapsulation mould technical field relates to a kind of encapsulation mould assembly for steering wheel switch PCBA. BACKGROUND

[0002] With the rapid progress of electronic technology, the integration of electronic products is constantly improving, and the packaging requirements of PCBA have become more stringent. Traditional packaging methods, such as epoxy resin pouring or silicone encapsulation, have problems such as complicated processing, low production efficiency, and easy thermal damage to electronic components. In addition, the production method using a single encapsulation mold also faces the challenge of difficult production. Therefore, it is necessary to design a packaging mold assembly for steering wheel switch PCBA to solve the above problems. SUMMARY

[0003] The utility model aims at the above problems existing in prior art, and provides a kind of encapsulation mould assembly for steering wheel switch PCBA.

[0004] To achieve the above object, the technical scheme of the utility model is: a kind of encapsulation mould assembly for steering wheel switch PCBA, characterized by including inner mould and outer mould, the shape of the inner mould adopts I-shaped, the shape of the outer mould adopts U-shaped, the inner mould is provided with a primary forming cavity for PCBA encapsulation forming, the two sides of the primary forming cavity are also provided with taking and placing opening, the outer mould is detachably connected on the inner mould, the outer mould and the inner mould form a secondary forming cavity for PCBA encapsulation forming between the two; The inner mould and the outer mould are made of soft material.

[0005] The two ends of the inner mould have outwardly protruding limiting portions, and the two ends of the outer mould have inwardly recessed groove portions, and the groove portions cooperate with the limiting portions.

[0006] The two sides of the lower part of the inner mould are also provided with long strip-shaped positioning notches, and the lower part of the outer mould is also provided with two long strip-shaped positioning ears, and the positioning ears cooperate with the positioning notches.

[0007] One end of the inner mould is also provided with a protection portion for PCBA protection.

[0008] By adopting the above technical scheme, the utility model has the beneficial effects that:

[0009] The utility model adopts the form of inner mould and outer mould, and the inner mould and the outer mould are made of soft material, so that the steering wheel switch PCBA can be two-step injection molding, which ensures the quality of the encapsulation and simplifies the processing difficulty of the mold. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1is the exploded view of the utility model.

[0011] Figure 2 is the three-dimensional structure schematic diagram of the inner mold in the utility model.

[0012] Figure 3 is the three-dimensional structure schematic diagram of the outer mold in the utility model.

[0013] Figure 4 is the sectional view of the utility model.

[0014] In the figure, 1, inner mold;1a, limiting portion;1b, positioning notch;1c, protection portion;2, PCBA;3, outer mold;3a, recess portion;3b, positioning ear;10x, primary forming cavity;10y, secondary forming cavity. DETAILED DESCRIPTION

[0015] In order to further explain the technical scheme of the utility model, the utility model is described in detail below through specific embodiments.

[0016] As Figures 1-4 Shown, the packaging mold assembly for steering wheel switch PCBA, including inner mold 1 and outer mold 3, the shape of inner mold 1 adopts I-shaped, the shape of outer mold 3 adopts U-shaped inner mold 1 has primary forming cavity 10x for the packaging of PCBA 2 Forming, the two sides of primary forming cavity 10x also have taking and placing mouth, outer mold 3 can be detachably connected on inner mold 1, and the secondary forming cavity 10y for the packaging of PCBA 2 Forming is formed between outer mold 3 and inner mold 1;Inner mold 1 and outer mold 3 are all made of soft material, and in the embodiment, inner mold 1 and outer mold 3 are made of prior art.

[0017] The two ends of inner mold 1 have outwardly protruding limiting portions 1a, the two ends of outer mold 3 have inwardly recessed recess portions 3a, and the recess portions 3a cooperate with the limiting portions 1a;The two sides of the lower part of inner mold 1 also have long strip-shaped positioning notches 1b, and the lower part of outer mold 3 also has two long strip-shaped positioning ears 3b, and the positioning ears 3b cooperate with the positioning notches 1b, using the structure, outer mold 3 can be accurately installed on inner mold 1, and then inner mold 1, outer mold 3 and PCBA 2 are tightly attached and limited to move.

[0018] One end of inner mold 1 also has a protection portion 1c for protecting PCBA 2, because low-pressure injection molding will appear bending, and the wire is easy to be broken, the protection portion 1c can wrap the wire harness, thereby protecting the wire harness.

[0019] The first encapsulation seals the area containing electronic components on PCBA 2, and only the edge of PCBA 2 without electronic component part is reserved;The second encapsulation covers the remaining part.

[0020] The specific process is:

[0021] 1. Preparation stage: accurately place the PCBA 2 component in the inner mold 1, ensure that all components are correctly installed and tested.

[0022] 2. Heat the hot melt glue: heat the thermoplastic polyamide resin hot melt glue to a molten state, and adjust to the appropriate injection temperature and pressure.

[0023] 3. Low pressure injection molding: this example uses a two-step encapsulation molding process, first accurately place the PCBA 2 component in the inner mold 1, then start the injection molding machine, melt the hot melt glue into the mold under low pressure; Strictly control the pressure and temperature parameters during the injection process to ensure that the hot melt glue can uniformly fill the mold and quickly solidify; After solidification, the semi-finished product is taken out and placed in the outer mold 3, and the injection molding machine is started to repeat the above process.

[0024] 4. Quality inspection: quality inspection and performance test of the encapsulated PCBA 2, to ensure that it meets the design requirements and industry standards.

[0025] In summary, the use of encapsulation mold assembly and low pressure injection molding process, using thermoplastic polyamide resin hot melt glue as the injection material, aims to improve the waterproof, moisture-proof, shock-resistant and chemical corrosion-resistant performance of electronic products.

[0026] The above components are all general standard components or components known to those skilled in the art, and their structure and principle can be known by technical personnel through technical manuals or through conventional experimental methods.

[0027] The above examples and drawings are not limited to the product form and style of the present application, and any appropriate changes or modifications made by those skilled in the art shall be considered as not departing from the scope of the present application.

Claims

1. A packaging mold assembly for a steering wheel switch PCBA, characterized in that, The application relates to a PCBA (2) packaging and molding mold, which comprises an inner mold (1) and an outer mold (3), the inner mold (1) is in the shape of an I-shaped section, the outer mold (3) is in the shape of a U-shaped section, the inner mold (1) is provided with a primary molding cavity (10x) for PCBA (2) packaging and molding, the primary molding cavity (10x) is further provided with taking and placing openings on both sides, the outer mold (3) is detachably connected to the inner mold (1), and a secondary molding cavity (10y) for PCBA (2) packaging and molding is formed between the outer mold (3) and the inner mold (1).

2. The packaging mold assembly for a steering wheel switch PCBA of claim 1, wherein, The inner mold (1) is provided with outwardly protruding limiting portions (1a) at both ends, the outer mold (3) is provided with inwardly recessed groove portions (3a) at both ends, and the groove portions (3a) are matched with the limiting portions (1a).

3. The packaging mold assembly for a steering wheel switch PCBA of claim 2, wherein, The inner mold (1) is further provided with positioning notches (1b) in the shape of long strips at both sides of the lower part, the outer mold (3) is further provided with two positioning ears (3b) in the shape of long strips at the lower part, and the positioning ears (3b) are matched with the positioning notches (1b).

4. The packaging mold assembly for a steering wheel switch PCBA of claim 1, wherein, One end of the inner mold (1) is further provided with a protection portion (1c) for PCBA (2) protection.

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