Injection molding is one of the most cost-effective ways to manufacture plastic parts in high volume, with consistent quality regardless of volume. Wellink offers a wide selection of rigid plastics and resins to meet structural and cosmetic features. In addition to materials, injection-molded parts can use custom finishes, finishes, or surface texturing processes. Wellink provides high precision tool making and injection molding services.

Injection molding service

Ability Injection molding, insert molding, secondary molding	Lead time more than 10 working days	Tooling Rapid Tooling: Recommended for 100–10,000 parts / Production Tooling: Recommended for 10,000+ parts
Material Plastics and Resins	Available machines Single cavity molds, multi-cavity molds, multiple casting molds in one mold; 50 to 1,100+ punch tonnage; side operation includes manual core loading	Cavity Tolerance ± 0.1 mm for tooling, plus ± 0.05 mm for shrinkage
Part repeatability ±0.1 mm or less	Critical Feature Tolerance Tighter tolerances can be achieved upon customer request, but may increase tooling costs due to more spot checks and trimming. In terms of key features, Wellink will mill to conditions that are safe for steel.	Available mold types Steel (tool steel, carbon steel) and aluminum; production grades range from Type 105 (prototype tooling) to Type 101 (very high production volume tooling).

Wellink injection molding

	Fast delivery Our molds have a short delivery time: 10 working days for express tooling and up to 20 days for production tooling.
	Continuous production Ideal for production of more than 100 parts.
	Accurate Wellink offers tight tolerance options in accordance with ISO 16742, up to ±0,07 mm, depending on the precision of the tool and the dimensions of the part.
	Tooling Single-cavity mold, multi-cavity mold, one-mold multi-cast mold options.
	Material selection A wide selection of materials allows you to achieve the strength and surface quality you need.
	Quality Control Our Quality Assurance department implements a strict quality assurance process.

Wellink injection molding mold classification

Mold classification	Cycle	Production	Formwork	(BHN)Minimum hardness(BHN)	Description
101	>1 Million	High	Heat Treated Stainless Steel	280	Supports fast cycles for fast production
101	<1 Million	Mid-high	Heat Treated Tool Steel	280	Suitable for parts with abrasives and tight tolerances
103	<50,000	Middle	P20 steel	165	Widely used for low to medium production volume components
104	<10,000	Low	mild steel, aluminium or alloy	<165	Ideal for parts with limited production volumes, especially those using non-abrasive materials
105	<500	Very low	Soft aluminum, epoxy resin, casting material	<165	Typically used for prototyping

Injection molding material
Plastic
●  ABS | acrylonitrile butadiene styrene polymer
●  ASA | Acrylonitrile styrene acrylate polymer
●  CA | Cellulose acetate
●  COPO | Copolyester
●  HDPE | High density polyethylene
●  LCP | Liquid crystal polymer
●  LDPE | Low density polyethylene
●  PA 6 | Polyamide 6, nylon 6
●  PA 6/6 | polyamide 6/6, nylon 6/6
●  PARA | Polyacrylamide
●  PBT | Polybutylene terephthalate
●  PBT-PET | polyethylene terephthalate polyethylene terephthalate
● PC | Polycarbonate
●  PC-ABS | Polycarbonate acrylonitrile butadiene styrene
●  PC-PBT | Polycarbonate PBT
●  PC-PET | Polycarbonate polyethylene terephthalate
●  PCT | cyclohexanedimethanol and terephthalate
●  PE | Polyethylene
●  PE-PP | Polyethylene polypropylene
●  PE-PS | Polyethylene polystyrene
●  PEBA | Polyether block amide
●  PEEK | PEEK
●  PEI | Polyetherimide
●  PES | Polyethersulfone
●  PET | polyethylene terephthalate
●  PLA | Polylactic acid
●  PMMA | polymethyl methacrylate
●  POM | POM
●  PP | Polypropylene
●  PPA | Poly (phthalamide)
●  PPS | Polyphenylene sulfide
●  PS | Polystyrene
●  PS-PPE | Polystyrene polyphenyl ether
●  PSU | polysulfone
●  PVC | PVC (Shore D)
●  PVDF | polyvinylidene fluoride
●  SAN | Styrene acrylonitrile
●  TPO | Thermoplastic polyolefin
●  TPU | Thermoplastic polyurethane (Shore D)

Elastomers and Synthetic Rubber
●  EPDM | EPDM
●  MPR | Meltable processing rubber
●  POE | polyolefin elastomer
●  PVC | PVC (Shore A)
●  TPE | Thermoplastic Elastomer
● TPU | Thermoplastic polyurethane (Shore A)
●  TPV | Thermoplastic elastomer, vulcanized rubber

Silicone Rubber
●  LSR | Liquid silicone rubber

Injection Molding Finish Options
Maintain the original state after processing
Injection-molded parts leave visible tooling marks.

SPI Surface Treatment

A1: Diamond - Polish Level 3 (Highly Polished)	B1: Sandpaper 600 (moderate polish)
A2: Diamond - Polish Level 6 (Highly Polished)	B2: Sandpaper 400 (moderate polish)
A3: Diamond - Polish Grade 15 (Highly Polished)	B3: Sandpaper 320 (medium to low polish)
C1: Stone 600 (light polished)	D1: Dry Sandblasted Glass Beads
C2: Stone 400 (lightly polished)	D2: Dry Blast 240 Oxide
C3: Stone 320 (lightly polished)	D3: Dry blasting 24 oxide

EDM STD Surface Treatment

 ●   VDI 12
 ●   VDI 15
 ●   VDI 18
 ●   VDI 21
 ●   VDI 24
 ●   VDI 27
 ●   VDI 30
 ●   VDI 33
 ●   VDI 36
 ●   VDI 39
 ●   VDI 42
 ●   VDI 45