Car Side Mirror Plastic Injection Mould

Focare manufactures car side mirror plastic injection moulds for automotive exterior plastic components, including mirror covers, bases, cover supports, swivel arms and mirror frames.

A side view mirror assembly contains several plastic components that must fit together accurately while maintaining good surface quality. For this reason, the mould design must consider material shrinkage, dimensional accuracy, slider movement, surface texture, draft angle, gating and melt flow from the beginning of the project.

Plastic Components of a Car Side Mirror

A typical automotive side mirror assembly may include a mirror cover, base, support structure, swivel arm, mirror frame, mounting components and other functional parts.

Different components require different plastic materials and mould structures depending on their appearance, strength and assembly requirements.

1. Car Mirror Cover

The mirror cover is one of the most visible parts of the assembly, so surface quality and dimensional consistency are particularly important.

>Plastic Material: ABS

>Cavity: 1R + 1L

>Gate: 1 hot runner tip transferred to cold runner

2. Car Mirror Base

The mirror base requires sufficient structural strength to support the mirror assembly and its connection to the vehicle.

>Plastic Material: PP + GF45

>Cavity: 1R + 1L

>Gate: Cold runner or side gate fed from one hot runner

3. Mirror Cover Support

The cover support must maintain dimensional accuracy to ensure proper assembly with the surrounding mirror components.

>Plastic Material: ABS

>Cavity: 1R + 1L

>Gate: 1 hot runner tip transferred to cold runner

4. Swivel Arm

The swivel arm is a functional component of the side mirror assembly and requires stable dimensions and accurate mould construction.

>Plastic Material: ABS

>Cavity: 1R + 1L

>Gate: 1 hot runner tip transferred to cold runner

5. Mirror Frame

The mirror frame must maintain consistent dimensions for proper assembly with the mirror glass and other components.

>Plastic Material: ABS

>Cavity: 1R + 1L

>Gate: 1 hot runner tip transferred to cold runner

Key Design Considerations for Car Side Mirror Moulds

Surface Quality and Assembly Accuracy

Surface quality is especially important for automotive exterior parts such as mirror housings and covers.

Material shrinkage and dimensional tolerances must be considered carefully during mould development so that the individual components can be assembled with consistent gaps and alignment.

For textured or coated exterior components, the mould surface and demoulding conditions must also be considered according to the required final appearance.

Slider Accuracy and Stability

Car mirror components often contain undercuts and complex geometries that require sliders or other side-action mechanisms.

The sliders should be precision-machined and move accurately and consistently during moulding. Stable slider positioning helps reduce the risk of flash, mismatch lines and dimensional variation on the finished component.

Draft Angle for Textured Surfaces

Insufficient draft can cause scratching or damage to textured surfaces during ejection.

For textured automotive components, sufficient draft should therefore be considered according to the texture depth and product geometry.

For some car mirror applications, a draft angle of approximately 5 degrees or more may be required to protect the textured surface during demoulding.

Runner, Gate and Melt Flow Design

The runner and gate design directly influence how the plastic material fills the cavity.

An appropriate gating system helps control filling behavior, weld lines and surface appearance while also affecting cycle time and material consumption.

The runner and gate arrangement should therefore be selected according to the geometry, material and cosmetic requirements of each car mirror component.

Materials Used for Car Side Mirror Plastic Parts

Different parts of a side view mirror may require different engineering plastics.

In this car mirror mould application, ABS is used for several exterior and structural components, while PP + GF45 is used for the mirror base where higher structural strength is required.

The final material selection should be confirmed according to the customer's product design, mechanical requirements, surface treatment and automotive specifications.

Car Side Mirror Injection Mould Manufacturer in China

Focare provides injection mould development for automotive plastic components from mould design and manufacturing to mould trial and sample evaluation.

For a new car side mirror, mirror housing or other automotive plastic part project, send us your 2D/3D part drawings and technical requirements. Our team can review the project and provide a mould solution and quotation.

Why choosing Focare Mould as your work partner?

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