Ergonomic black TPR insert molding on a yellow aluminum die cast pneumatic tool housing, providing superior grip and vibration absorption.

ISO 9001:2015 Certified Manufacturer

In-House
TPR Insert Molding

TPR grip molding within our facility, allowing complete brand customization without external suppliers. OEM customers receive finished, branded components from a single dependable source.

Solution

1 Stop

In-House Production

Expertise

38+

Years Experience

On-Time Delivery

99%

Reliable Delivery Rate

JoinCast provides in-house TPR insert moulding primarily for pneumatic tool handles and grips. We injection mould thermoplastic rubber directly onto die cast aluminum components, giving you improved slip resistance, ergonomic comfort, and enhanced product feel for end users. This capability is fully integrated within our production workflow.

Our in-house printing line applies custom logos and branding to aluminum components using single-color screen printing. You can specify your branding requirements, and we complete printing on-site before final inspection and shipment so there is no need to coordinate with separate finishing vendors.

We can offer custom finishes with different shore hardness to suit your particular applications and durability requirements. Our in-house expertise in TPR insert mold making allows us to handle complex shapes and ensure perfect molding results for your brand

What TPR hardness options are available for tool grips and handles?

We offer TPR durometers ranging from Shore A 40 (soft, cushioned feel) to Shore A 70 (firmer, more durable) depending on your application requirements.

Pneumatic tool handles typically use Shore A 50-60 for optimal grip comfort during extended use, while other applications may require firmer TPR for mechanical durability. We can provide samples at different harnesses for your evaluation.

How do you ensure the TPR bonds properly to the aluminum casting?

Aluminum surfaces undergo specific preparation including degreasing and primer application before TPR injection molding. The combination of mechanical interlocking (achieved through designed undercuts in the casting) and chemical adhesion creates permanent bonds that withstand tool operation stresses.

We can perform pull-testing on first articles to validate bond strength for your application.

Can you mold TPR over powder-coated or anodized aluminum surfaces?

TPR adhesion works best on bare aluminum or specifically formulated primers.

How durable is pad printing on parts that will be handled frequently or exposed outdoors?

Pad printing on properly prepared aluminum surfaces withstands normal handling, but high-wear areas like grip surfaces or frequently touched controls will show wear over time.

Can you match specific Pantone colors for printed logos on my products?

Yes, we can match Pantone colors for pad printing, though final appearance varies slightly based on substrate color and surface texture. We recommend providing physical color samples or approved parts for matching rather than relying solely on Pantone numbers.

First article samples will be submitted for your approval before production printing begins.

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ISO-Certified Quality & Advanced Inspection Component Inspection

JoinCast strictly adheres to the ISO 9001:2015 quality management system. We have invested in a dedicated 10 person QC team for stringent quality control from incoming material to right through to final shipment.

We use Keyence 3D Scanning Systems for dimensional verification and 3D CMMs for micron-level dimensional accuracy verification