Plastic Injection Overmolding

Description

Plastic Injection Overmolding is the injection molding process where one material (usually a TPE) is molded onto a second material (typically a rigid plastic). If properly selected, the overmolded TPE will form a strong bond with the plastic that is maintained in the end-use environment. The use of primers or adhesives is no longer required to achieve an optimum bond between the two materials.

Plastic Injection Overmolding can be used to enhance many features of product designs, including

-Vibration damping

-Increase in comfort level

-Water resistant seal

-Sound absorption

-Electrical insulation

Two injection molding processes dominate the manufacture of Plastic Injection Overmolding: insert molding and multi-shot injection molding.

-Insert Molding

The most widely used process for Plastic Injection Overmolding is insert molding, where a pre-molded insert is placed into a mold and the TPE is shot directly over it. The advantage of insert molding is that conventional single shot IM machines can be used (new machinery expenditures are not necessary), and the tooling costs associated with insert molding are lower than with multi-shot processing.

-Multiple Material Molding

Multiple material, also known as two-shot (or multi-shot) Plastic Injection Overmolding process, molding requires a special injection molding machine that is equipped with two or more barrels, allowing two (or more) materials to be shot into the same mold during the same molding cycle. A molder will choose multi-shot molding to reduce cycle times, achieve superior part quality and reduce labor costs.

For Plastic Injection Overmolding process selection, in general, insert molding is the process of choice when annual production volumes and local labor costs are low. For higher volume production programs (over 250,000 units annually) or areas with increased labor costs, multi-shot molding operations are the method of choice.  

Auwell offers both insert molding and multi material plastic injection overmolding process for clients’ option.

Advantages

-Rich Experience

More than 20 years of experience in Plastic Injection Overmolding product development and part production, especially to the European and North American markets, with solid understanding of the material, technical and quality standards worldwide.

-Fast Turnaround

Generally, we provide a quotation within 3 working days. Combining the latest manufacturing technologies and facilities, Auwell is able to deliver first sample in 6 weeks.

-Comprehensive Solution Provider

Auwell provides comprehensive services for Plastic Injection Overmolding projects starting from designing, through prototyping, tooling/fixture development, sampling, mass production, and to logistic and post-sale support.

-Rigid QC Policies

The most rigorous quality policy starts from material control, and is followed through to final pre-shipment inspection for Plastic Injection Overmolding orders. Material certificates include the mill certificate, 3rd party chemical components, and mechanical property reports, as well as RoHS and REACH reports upon request. We structure our processes, creating Flow Charts and Control Plans before production, making sure all QC processes are in accordance with ISO9001-2015 requirements and drawing specifications.

-Flexible Payment Term

For tooling, the general payment term is 50%-50%, meant 50% deposit, 50% after first sample free. For mass production, we offer flexible payment terms, reasonable credit terms will be given, the client only pays when they are happy with the product they received. For long-term projects, we offer call-off inventory services for fast delivery requirements.

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The following catalogues of plastic injection parts are the ones which Auwell has produced and supplied to our distinguished worldwide clients. Please click the relevant pictures for details. Please be advised, most of the products are for demonstration purpose only.