Product

ETF-COATED DOOR BELT

As the exterior appearance of newly released vehicle models became more luxurious, there was a need to apply a glossy black color to the door belt's exterior for color consistency. This was achieved by attaching an Exterior Trim Film (ETF) to the exterior during the door belt extrusion process, successfully implementing the color without a separate plating process

Film Thickness

70µm

Expected Effect

Application of the film to the door belt's exterior to achieve a glossy black color

PVD-COATED DOOR BELT

Although the technology to apply a glossy black color to the door belt's exterior by attaching ETF was developed, problems such as wrinkling or cracking could occur depending on the door belt's design. To reduce these defects, a technology was developed to deposit a thin film directly onto the SUS material itself, allowing for the implementation of the black color without the need for plating or ETF.

PVD(Physical Vapor Deposition)

A technology that deposits solid particles onto a material in a vacuum state to form a thin film using physical methods.

Expected Effect

Achieving a glossy black color on the door belt's exterior, simplifying the process compared to the ETF specification.

ALUMINUM ROLL FORMING

With environmental issues becoming a concern in various countries including the USA, Europe, and Japan, the automotive industry is actively pursuing vehicle lightweighting to improve fuel efficiency. Using aluminum instead of steel can achieve a weight reduction of more than 60%.

Steel/Aluminum Density

7.75 / 2.68

Expected Effect

Weight reduction and cost saving, improved formability, minimized spring back effect, and increased recyclability

TRIPLE EXTRUSION

To comply with EU end-of-life vehicle recycling regulations, door belts are being developed using thermoplastic materials that are easy to recycle. As these do not incorporate a metal core, continuous sizing molds are arranged to prevent deformation and enhance the formability of the product.

Expected Effect

Cost reduction due to simplified manufacturing processes, component lightweighting, and enhanced recyclability

HIGH-GLOSS INJECTION MOLDING

To meet the trend of luxury enhancement and quality improvement in automobiles, high-gloss injection molding is applied to door frame garnishes. Unlike the conventional process requiring a painting process to achieve a glossy black color, the painting process is unnecessary when using PMMA for high-gloss injection.

PMMA

Often used as an alternative to glass, it is known for being lightweight, transparent, and durable.

Expected Effect

Process simplification, cost reduction, and reduced defect rates.

DLO MOLDING ALUMINUM EXTRUSION AND SURFACE TREATMENT

To improve the exterior color harmony of DLO molding, aluminum extrusion methods are being examined.

Aluminum Extrusion

A process where a billet is pushed through a die under high temperature and pressure, shrinking its cross-section to produce a profile.

Anodizing

A process that forms an oxide film on the surface of a product to prevent oxidation and enhance durability.

Expected Effect

Lightweight and high strength, able to maintain strict tolerances, and offers a variety of surface finishes

GAS INJECTION

Thin and long products are prone to defects such as sink marks and flow marks during injection molding, and warping or cracking due to residual stress after molding. To improve this, a new method has been developed

GAS INJECTION

A technique where gas is injected during molding to improve the flow of the resin, creating hollow spaces inside the molded item, which also aids in lightweighting

Expected Effect

Decreased rate of exterior quality defects, lightweighting due to gas channels, and cost reduction

VARIABLE EXTRUSION

Traditional molding could only extrude in a uniform cross-section, limiting the range of part applications. However, variable extrusion technology allows for up to three different shapes to be implemented, expanding the product's application range

RAIN GUTTER

A feature that prevents rainwater wiped by the front wipers from overflowing to the side windows, thus not obstructing the side view during rain

Expected Effect

Improved exterior aesthetics, application of rain gutter function to glass molding