Injection Molding

Injection Molding MachinesFounded in 1970, DaMar Plastics is one of the oldest and most experienced Injection Molding companies in San Diego. From our humble beginnings, DaMar Plastics has grown in both knowledge and capabilities. As a result of our work in a broad array of industries, we have worked with a large selection of materials and resins and with that knowledge are equipped to assist you with a successful commercialization of your product.

What is Injection Molding?

Injection molding (British variant spelling: moulding) is a manufacturing technique for making parts from both thermoplastic and thermosetting plastic materials in production. Molten plastic is injected at high pressures into a mold, which is the inverse of the product’s shape. After a product is designed, usually by an industrial designer or an engineer, molds are made by a mold maker (or toolmaker) from metal, usually either steel or aluminum, and precision-machined to form the features of the desired part. Injection molding is widely used for manufacturing a variety of parts, from the smallest component to entire body panels of cars.

Blow Molding

Blow MoldingWe are a custom Blow Molding manufacturer servicing the automotive, household, construction, medical, chemical, cosmetic/personal care and water industries. With the ability to manufacture small and large parts as well as packaging products, we are a full service Blow Molding manufacture.

We develop distinctive Blow Molded products with our customers that enhance their product success and branding in the market place.

We also offer a wide variety of stock molds and tooling that includes wide mouth jars, canisters and plastic industrial rounds.

What is Blow Molding?

We use extrusion blow molding (EBM) technology, where plastic is melted and extruded into a hollow tube (a parison). This parison is then captured by closing it into a cooled metal mold. Air is then blown into the parison, inflating it into the shape of the hollow bottle, container, or part. After the plastic has cooled sufficiently, the mold is opened and the part is ejected. Continuous and Intermittent are two variations of Extrusion Blow Molding. In Continuous Extrusion Blow Molding the parison is extruded continuously and the individual parts are cut off by a hot knife