CN212707771U - Atmosphere lamp injection mold - Google Patents

Abstract

An atmosphere lamp injection mold comprises a front mold, a rear mold, a front mold core and a rear mold core, wherein the front mold core is positioned at the center of the front mold, the rear mold core is positioned at the center of the rear mold and is opposite to the front mold core, the atmosphere lamp injection mold is characterized in that the front mold core is provided with a front installation cavity for arranging a light screen, the rear mold core is provided with a rear installation cavity for arranging a PCB (printed circuit board) and a light guide plate and an injection pore, the injection pore is introduced into the rear installation cavity, and the front mold core is provided with a first positioning mechanism for positioning the light screen; and the rear mold core is provided with a second positioning mechanism for positioning the light guide plate and a top rod capable of jacking the light guide plate. The injection mold is formed by the front mold core and the rear mold core with the cavities, so that the investment cost of the mold is low, and the injection molding is convenient and quick.

Description

Atmosphere lamp injection mold

Technical Field

The utility model relates to a mould especially relates to an integrative mould of moulding plastics that is used for atmosphere lamp housing and light screen.

Background

People have higher and higher requirements on the individuality of the automotive interior, so that the application of the atmosphere lamp in the automotive interior is more and more common. The atmosphere lamps are generally disposed at positions such as an instrument panel, a door panel, a ceiling, and a step of an entry door.

Common atmosphere lamp basic structure includes casing, PCB board, light guide plate, reflective membrane, even membrane and light screen among the prior art, and in the installation cavity of casing was located to PCB board, light guide plate, reflective membrane, the light screen was located on the port of casing, and the back of light screen was located to even membrane, has the luminous LED of ability on the PCB board. The atmosphere lamp is connected to the circuit, and the signal is put through, and LED lights on the PCB, and light passes through the light guide plate conduction and forms the area that shines need luminous on the outward appearance face after reflecting on the reflection optical surface of light guide plate and reflective membrane to accomplish the pattern on the diaphragm and light.

Double-sided tape sticking and glue filling treatment are needed in the assembly of parts of the existing atmosphere lamp, so that the process is multiple and the time is long; the method comprises the steps of punching and forming the metal aluminum piece, and bonding the punched aluminum piece by using UV glue to form an assembly appearance piece; after being welded with a wire harness, the PCB and the wire harness are arranged at the corresponding position of the shell, and the accurate assembly position of the PCB is ensured through the positioning position on the shell; the light guide plate, the reflective film and the light homogenizing film are assembled and installed on the shell, and the relative position of the light guide plate is ensured to be accurate by utilizing the positioning on the shell; the appearance piece and the assembled rear shell are connected and sealed in a glue pouring mode, the wire outlet hole of the wire harness at the rear portion of the rear cover is sealed in a glue pasting mode, the appearance face of the product is mainly a metal piece, the manufacturing process is complex, and the manufacturing cost is high.

The shell and the light screen are integrally formed by injection molding, and the existing injection mold is required to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a mould that is fit for atmosphere lamp injection molding is provided to foretell technical current situation.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: an atmosphere lamp injection mold comprises a front mold, a rear mold, a front mold core and a rear mold core, wherein the front mold core is positioned at the center of the front mold, the rear mold core is positioned at the center of the rear mold and is opposite to the front mold core, the atmosphere lamp injection mold is characterized in that the front mold core is provided with a front installation cavity for arranging a light screen, the rear mold core is provided with a rear installation cavity for arranging a PCB (printed circuit board) and a light guide plate and an injection pore, the injection pore is introduced into the rear installation cavity, and the front mold core is provided with a first positioning mechanism for positioning the light screen; and the rear mold core is provided with a second positioning mechanism for positioning the light guide plate and a top rod capable of jacking the light guide plate.

Preferably, the first positioning mechanism comprises an air exhaust channel formed on the front mold core and an air exhaust part connected with the air exhaust channel, and the inner end of the air exhaust channel is communicated with the front mounting cavity. The front installation cavity is matched with the air exhaust channel to position the light screen.

Furthermore, the second positioning mechanism comprises at least one positioning column, and the positioning column is matched with the positioning hole of the light guide plate.

The rear die is provided with a sliding block on one side of the rear die core, the sliding block can position the wiring harness of the PCB on one side of the rear die core, the front die is provided with an oblique guide pillar, one end of the oblique guide pillar is connected with the sliding block, and the oblique guide pillar can drive the sliding block to be far away from the rear die core when the front die is separated from the rear die. The wiring harness of the PCB can be detached through the matching between the sliding block and the inclined guide post.

The rear mounting cavity is internally provided with a glue sealing part, the PCB is arranged in the rear mounting cavity, and the LED on the PCB is positioned in the glue sealing part. The glue sealing piece can ensure that the LED is not damaged by the raw materials for injection molding in the injection molding process.

Compared with the prior art, the utility model has the advantages of: the injection mold is formed by the front mold core and the rear mold core with the cavities, the mold is low in investment cost, the injection molding is convenient and fast, the wiring harness of the PCB can be detached through the matching between the sliding block and the inclined guide pillar, the arrangement is simple, and the operation is easy.

Drawings

FIG. 1 is a schematic view of a structure of an automotive interior atmosphere lamp.

FIG. 2 is an exploded view of an automotive interior mood light.

Fig. 3 is an enlarged sectional view taken along a-a in fig. 1.

FIG. 4 is a schematic view of an injection mold in the example.

FIG. 5 is an enlarged view of the front and rear mold cores of FIG. 4.

FIG. 6 is a schematic structural diagram of a PCB board after being disposed on a rear mold core.

Fig. 7 is an enlarged view of a portion a of fig. 6.

FIG. 8 is an enlarged view of the front and rear mold cores after injection molding.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1, 2 and 3, automotive interior atmosphere lamp includes casing 1, PCB 5 and light guide plate 2, and in the installation cavity of casing 1 was located to PCB 5 and light guide plate 2, had luminous LED52 and external pencil 51 of having on the PCB 5, this LED52 was close to the setting of light guide plate 2, and the integrative light screen 3 that has of injection moulding on the port of casing 1 has in this light screen 3 printing opacity pattern 31, and light screen 3 can adopt the IML abrasive disc. The light emergent surface of the light guide plate 2 is close to the shading plate 3. The back of the light guide plate 2 is provided with a reflective film 4.

The atmosphere lamp is connected to the circuit, and the signal is put through, and LED lights on PCB board 5, and light passes through light guide plate 2 conduction and forms the luminous region of shining on the outward appearance face after the reflection on light guide plate 2 reflection optical surface and reflective membrane 4 to accomplish the pattern on the light screen 3 and light.

As shown in fig. 4 to 8, the atmosphere lamp injection mold in the embodiment includes a front mold 10a, a rear mold 20a, a front mold core 1a and a rear mold core 2a, the front mold core 1a is located at the center of the front mold 10a, the rear mold core 2a is located at the center of the rear mold 20a and is opposite to the front mold core 1a, the atmosphere lamp injection mold is characterized in that the front mold core 1a has a front installation cavity for the light shielding plate 3 to be disposed, the rear mold core 2a has a rear installation cavity for the PCB and the light guide plate 2 to be disposed and an injection hole 7a, the injection hole 7a is introduced into the rear installation cavity, and the front mold core 1a is provided with a first positioning mechanism for positioning the light shielding plate; the rear mold core 2a is provided with a second positioning mechanism for positioning the light guide plate 2 and a top rod 5a capable of jacking the light guide plate 2.

The first positioning mechanism comprises an air exhaust channel 11a formed on the front die core 1a and an air exhaust piece connected with the air exhaust channel 11a, and the inner end of the air exhaust channel 11a is communicated with the front mounting cavity.

The first positioning mechanism comprises a first positioning column 6a and a second positioning column 61a, and the first positioning column 6a and the second positioning column 61a are respectively positioned at two ends of the light guide plate 2.

The rear die 20a is provided with a slide block 3a at one side of the rear die core 2a, the slide block 3a can position the wiring harness of the PCB at one side of the rear die core 2a, the front die 10a is provided with an inclined guide post 4a, one end of the inclined guide post 4a is connected with the slide block 3a, and the inclined guide post 4a can drive the slide block 3a to be far away from the rear die core 2a when the front die 10a is separated from the rear die 20 a.

And a glue sealing part 21a is arranged in the rear mounting cavity, and the LED on the PCB 5 is positioned in the glue sealing part 21a under the condition that the PCB is arranged in the rear mounting cavity.

Referring to fig. 4 to 8, the method for manufacturing the automotive interior atmosphere lamp includes the following steps:

placing the PCB 5 in the positioning groove of the rear mold core 2a, wherein the glue sealing piece 21a in the positioning groove just covers the LED 52; the PCB 5 is placed in the positioning groove of the rear die core 2a, the wiring harness 51 is placed on one side of the rear die core 2a and is pressed by the sliding block 3a, the sliding block 3a is arranged on the inclined guide post 4a of the front die core 1a to be connected, and during demoulding, the inclined guide post 4a drives the sliding block 3a to move, so that the limitation on the wiring harness 51 is cancelled.

The back of the light guide plate 2 is adhered with the reflective film 4, and the light guide plate 2 adhered with the reflective film 4 is placed in the inner cavity of the rear mold core 2a and is positioned by a first positioning mechanism;

the shading plate 3 is placed in the inner cavity of the front mold core 1a and is positioned by matching an air exhaust component with an air exhaust duct 11 a;

the ejector rod 5a pushes the light guide plate 2 to move, so that the light guide plate 2 is attached to the front mold core 1a, and meanwhile, the light guide plate 2 is attached to the LED52 and keeps still; the front mold core 1a and the rear mold core 2a are closed, injection molding is started, and injection molding is injected through injection molding holes (not shown in the figure) on the side edges of the rear mold core;

before the injection molding is finished and pressure maintaining is carried out, the ejector rod 5a is reset, and the space material is filled;

and (5) finishing injection molding and demolding.

First positioning mechanism includes first reference column 6a and second reference column 61a, and first reference column 6a and second reference column 61a are located light guide plate 2 both ends respectively, and the position that the post was removed after the drawing of patterns is formed with the through-hole, is provided with waterproof ventilated membrane 6 at the outer terminal surface of through-hole at last, prevents that the through-hole from causing to leak.

Through technical improvement, the manufacturing process is simplified, the scratch resistance of the surface of a product and the silk-screen printing of a diaphragm are mainly realized by using a shading plate, and the laser etching process is used for making textures similar to metal texture to replace metal stamping parts in similar products;

the sealing performance of the edge of the light screen is realized by using the insert injection molding of the light screen and the shell, so that the surface A of the lamp is sealed, and the assembly has better waterproof and dustproof functions;

the reflecting film, the light guide plate, the PCB assembly, the power supply connector and the shell insert are molded to realize back sealing of the lamp, meanwhile, sealant is saved, and cost is reduced.

Claims (5)

1. An atmosphere lamp injection mold comprises a front mold (10a), a rear mold (20a), a front mold core (1a) and a rear mold core (2a), wherein the front mold core (1a) is positioned at the center of the front mold (10a), the rear mold core (2a) is positioned at the center of the rear mold (20a) and is opposite to the front mold core (1a), the atmosphere lamp injection mold is characterized in that the front mold core (1a) is provided with a front installation cavity for arranging a light screen (3), the rear mold core (2a) is provided with a rear installation cavity for arranging a PCB (printed circuit board) and a light guide plate (2) and an injection pore (7a), the injection pore (7a) is communicated into the rear installation cavity, and the front mold core (1a) is provided with a first positioning mechanism for positioning the light screen (3); and a second positioning mechanism for positioning the light guide plate (2) and a top rod (5a) capable of jacking the light guide plate (2) are arranged on the rear mold core (2 a).

2. The atmosphere lamp injection mold according to claim 1, wherein the first positioning mechanism comprises an air exhaust channel (11a) formed on the front mold core (1a) and an air exhaust member connected with the air exhaust channel (11a), and the inner end of the air exhaust channel (11a) is communicated with the front installation cavity.

3. An atmosphere lamp injection mold according to claim 1, wherein the second positioning mechanism comprises at least one positioning post, which is adapted to a positioning hole of the light guide plate (2).

4. The atmosphere lamp injection mold according to claim 1, wherein the rear mold (20a) is provided with a slider (3a) at a side of the rear mold core (2a), the slider (3a) can position the wiring harness of the PCB board at a side of the rear mold core (2a), the front mold (10a) is provided with an inclined guide pillar (4a), one end of the inclined guide pillar (4a) is connected with the slider (3a), and the inclined guide pillar (4a) can drive the slider (3a) to be away from the rear mold core (2a) in a state that the front mold (10a) is separated from the rear mold (20 a).

5. The atmosphere lamp injection mold according to claim 1, wherein the rear mounting cavity is provided with a sealant (21a), the PCB is placed in the rear mounting cavity, and the LEDs on the PCB are located in the sealant (21 a).

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