Rear Mirror Mould

Rearview mirrors are an important part of automotive exterior parts. They are located on both sides of the car and are one of the most important exterior parts of the car. A car rearview mirror is a device used to allow drivers to observe road conditions while driving. It can be said to be the driver's eyes.

Rearview mirror products have strict appearance requirements. High-end mirrors generally have surface fine-grain treatment, and low-end mirrors generally have spray-painting treatments. Depending on the car model, rearview mirrors are divided into split and integral designs. Mid- to high-end cars adopt split designs, while low-end cars adopt integral designs.

The mould structure for a car rearview mirror housing typically consists of multiple components that come together to form the final product. Here is a general overview of the mould structure:

• Cavity and core inserts: These are the main components of the mould that create the shape and contour of the rearview mirror housing. The cavity insert forms the outer surface, while the core insert shapes the inner side of the housing.
• Sliders or lifters: Depending on the complexity of the design, sliders or lifters may be incorporated into the mould to create undercuts or complex features of the housing. These components enable the mould to release the finished part properly.
• Ejector pins: Ejector pins are used to push the completed part out of the mould once it has solidified. They are positioned strategically to ensure a smooth ejection without damaging the part.
• Cooling system: The mould includes channels or passages for cooling water or other cooling fluids to circulate. This helps in controlling the temperature during the moulding process, ensuring proper solidification and reducing cycle time.
• Alignment and assembly features: If the rearview mirror housing consists of multiple parts that need to be assembled, the mould may include alignment features or inserts to ensure precise positioning during the moulding process.

It's important to note that the specific mould structure can vary depending on the complexity of the rearview mirror housing design, materials used, and manufacturing requirements.

For car rearview mirror housing molds, attention should be paid to the following when designing:

The parting line of the plastic part comes out on R, and R comes out on the fixed and movable mold respectively. For this kind of mold with R half-open or 3-7 open, special attention should be paid to making the movable mold core smaller by 0.05-0.1mm in order to make the clamp line invisible during design to avoid step differences in the plastic parts.

The fixed and movable die stops must be designed for precise positioning. Avoid misalignment of fixed and movable mold cores and prevent step differences in plastic parts.

When the mirror housing undercut 5 of this mold is designed as a push block structure, the parts must be taken out manually, and there must be room for swinging when the plastic parts are taken out.

The edge of the fixed core of the mirror shell mold has sharp edges, so care must be taken to protect it during mold making. It is best to protect it with opaque tape to avoid gaps during transportation.

When designing an inclined slider that pulls the core along the up and down direction of the Z-axis, it is necessary to note that the slope of the bottom surface of the front end of the inclined slider must be greater than or equal to the angle of the bottom surface of the inclined slider seat to avoid undercuts.

The design of the cooling water, springs, etc. of the inclined slider must be parallel to the core pulling angle of the inclined slider to facilitate the processing of the inclined slider. 3. When ordering the oblique slider, you need to order the embryonic body along the tilt direction of the oblique slider to facilitate subsequent processing.

The bottom of the wear-resistant block at the bottom of the oblique slider should be designed to be straight, and the wear-resistant block should protrude to avoid interference with the B plate and the oblique slider travel stop when the oblique slider retreats.

Since the inclined slider needs to be installed together with the fixed mold core to save the clamping opening, the slider needs to be designed with a mushroom head positioning, and attention should be paid to the design of process screws to facilitate the installation of the fixed mold core and the inclined slider together to save the clamping opening.

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