Rebling has over 20 years of experience in plastic injection molding each the homopolymer acetal (DELRIN®) and copolymer acetal (CELCON®). This extremely versatile materials is famous for wonderful abrasion resistance and low frictional coefficient which lends itself to applications such as gears, pulleys, bushings, and pumps. China mold maker of acetal plastic embrace wonderful creep resistance, high floor hardness, low moisture absorption and dynamic fatigue resistance.

The resistance of acetal thermoplastic material to a broad range of solvents together with aliphatic and aromatic hydrocarbons, alcohols, esters, glycols, ketones, detergents, gasoline and motor oils has resulted in it being the plastic injection molding materials of alternative for many automotive and plumbing purposes. Acetal should not be used if publicity to phenol, aniline, sulfuric acid, hydrochloric acid and nitric acid is anticipated. The copolymer of acetal (CELCON®) offers improved resistance to very sturdy bases when in comparison with the homopolymer version. Acetal is also very notch delicate, so sharp corners and notches needs to be prevented when designing for plastic injection molding.


Properties of Acetal
Acetal is a crystalline thermoplastic that maintains a considerable portion of its power and stiffness at temperatures approaching 200 °F. Rebling has participated in acetal injection molding tasks of all types. Rebling has, for example, plastic injection molded acetal in a variety of excessive gloss colors. As with most different thermoplastics, we mold numerous grades of acetal together with numerous concentrations of glass-filled compounds for improved power and stiffness, influence modified grades, put on resistant grades, ultraviolet resistant grades, and antistatic and electrically conductive grades.


Secondary Operations for Acetal elements
Rebling has provided acetal plastic injection molding parts that required publish molding operations similar to ultrasonic welding, secondary machining operations (including drilling and threading), and cold staking. Rebling routinely molds acetal with machined metallic components embedded in the plastic, generally referred to as insert molding.


Acetal Plastic Injection Molding Design
Due to the excessive degree of crystallinity in acetal, the shrinkage just isn't uniform in all material move directions. This anisotropic shrinkage of acetal makes close tolerance plastic injection molding difficult. Consequently, round components and features can incur some ovality if not gated appropriately, and warpage of flat, thin-walled components will be troublesome for plastic injection molding. Rebling has employed various gate configurations to reduce these plastic injection issues. As with all thermoplastic materials, part design is essential in acquiring a useful, aesthetic and optimum acetal plastic half. Using ribs, gussets, bosses and different coring methods ought to be integrated into the design in order to take care of a uniform wall thickness. Nook radii must be generous with a purpose to remove stress concentration elements. Rebling employees may be contacted concerning design and material specification issues for any plastic injection molded acetal product.