Injection Molding

Injection Molding Production Services

Plastic parts feature outstanding advantages including light weight, corrosion resistance, electrical insulation, easy forming, low production cost, and flexible color & shape customization. They are widely applied across nearly all sectors, such as consumer goods, industrial equipment, medical devices, military supplies and infrastructure construction.

DOTZENO boasts nearly 17 years of professional injection molding experience. We have accumulated extensive expertise in stable, mass-volume production of plastic molded components. Simply send your design drawings to our engineers, and we will promptly provide professional analysis and optimization solutions.

Our Services Include

Mold Manufacturing

DOTZENO supplies custom injection molds optimized for both prototype testing and massproduction requirements. Prior to mold fabrication, our engineers perform thorough moldflow analysis on your product designs. We simulate realworld injection conditions to spot common potential defects including shrinkage, warpage, air entrapment and weld marks. Corresponding optimizations on gating, cooling system and mold structure will be implemented upfront to minimize production risks. Combined with DFM feedback, we help improve mold durability and guarantee consistent quality for your plastic components.

Common General-Purpose Plastics for Injection Molding

Abbreviation	Full Name	Appearance & Texture	Core Advantages	Disadvantages	Typical Injection Molded Products
PE	Polyethylene	Milky white translucent, waxy hand feel, good toughness	Low temperature resistance, waterproof & corrosion resistant, acid & alkali resistant, extremely low cost	Low hardness, easy to scratch, poor high temperature resistance (<80℃), difficult to bond	Plastic bags, water buckets, bottle caps, pipes, turnover boxes
HDPE	High-Density Polyethylene	Harder, matte finish	Better rigidity and hardness than LDPE	Slightly poor low-temperature toughness	Chemical drums, plastic basins, pipelines
LDPE	Low-Density Polyethylene	Soft, easy to bend	Ultra soft, tear resistant	Low strength, easy to deform	Films, hoses, cling film, soft bottle caps
PP	Polypropylene	Translucent, lightweight, turns white when bent	Lightest plastic, resistant to 100℃ boiling water, chemical resistant, foldable, high cost-performance ratio	Brittle at low temperatures, poor UV resistance, low-temperature toughness	Meal boxes, water cups, home appliance housings, automotive interiors, woven parts
PVC	Polyvinyl Chloride	Transparent or matte finish	Flame retardant, weather resistant, low cost, easy to color	Releases harmful substances at high temperatures, requires additives for processing, brittle at low temperatures	Drainage pipes, profiles, wire sheaths, toys (eco-friendly modified PVC)
PS	Polystyrene	High transparency, hard & brittle, crisp sound when tapped	High light transmittance, easy to color, extremely easy to mold, low cost	Extremely brittle, cracks under slight impact, poor solvent resistance	Disposable lunch boxes, transparent lamp shades, accessories, home appliance liners
HIPS	High-Impact Polystyrene	Milky white, opaque	Modified PS, greatly improved toughness	Loss of transparency, average heat resistance	Refrigerator inner liners, toy housings, home appliance housings

Common Engineering Plastics for Injection Molding

Abbreviation	Full Name	Core Properties	Temperature Resistance	Advantages & Disadvantages	Typical Injection Molded Applications
ABS	Acrylonitrile Butadiene Styrene	Balanced rigidity and toughness, easy to electroplate and color	-20~85℃	Pros: Best comprehensive performance among general-purpose plastics; Cons: Poor resistance to organic solvents, average weatherability	Remote controls, keyboard keycaps, luggage, automotive exterior parts, home appliance housings
PC	Polycarbonate	Ultra-high impact resistance, high light transmittance	-40~120℃	Pros: High temperature resistant, shatterproof; Cons: Prone to stress cracking, poor alkali resistance, relatively high cost	Water cups, safety helmets, automotive lamp lenses, optical lenses, phone protective cases
PC/ABS	PC/ABS Alloy	Combines PC’s high temperature & impact resistance with ABS’s excellent processability	-35~110℃	Pros: Balanced comprehensive performance, cost between PC and ABS; Cons: Inherits partial limitations of both base materials	Automotive components, high-end electronic product housings
PA6/PA66	Polyamide 6 / Polyamide 66 (Nylon 6 / Nylon 66)	Wear-resistant, self-lubricating, high mechanical strength	PA6: 105℃; PA66: 125℃	Pros: Excellent wear resistance and fatigue strength; Cons: Highly hygroscopic, prone to dimensional deformation, strict drying requirements before processing	Gears, bearings, snap fits, automotive fasteners, zippers
POM	Polyoxymethylene (Acetal/Delrin®)	High hardness, low friction coefficient, excellent dimensional stability	-40~110℃	Pros: Outstanding dimensional stability and wear resistance; Cons: Poor resistance to strong acids and alkalis, easy to decompose at high temperatures	Precision gears, bearings, keypads, door lock structural parts
PMMA	Polymethyl Methacrylate (Acrylic)	Ultra-high light transmittance (92%), high gloss finish	-20~90℃	Pros: Excellent optical clarity, easy to polish and color; Cons: Extremely brittle, poor scratch resistance, low impact strength	Optical lenses, lamp shades, nameplates, decorative transparent parts
PBT	Polybutylene Terephthalate	Fast molding cycle, excellent dimensional stability, wear-resistant	Heat deflection temperature: 130℃	Pros: Fast crystallization, low warpage, good electrical insulation; Cons: Average mechanical strength without glass fiber reinforcement	Electronic connectors, automotive lamp skeletons, electrical plug-in components