Precision Plastic Injection Molding Services
From DFM and mold design to tooling, trial production, and high-volume manufacturing, PartsMake helps transform plastic product concepts into reliable production parts.
50–800T
Machine range
1g–5kg
Part weight
±0.03mm
Precision capability
1M+
Production volume
Mold size
Up to 1000 × 800 mm
Response time
RFQ in 24–48 hours
Production platform
A molding capability built around repeatable production
Our facility supports engineering prototypes, bridge tooling, and sustained mass production. Mold construction can use P20, 718H, NAK80, S136, or H13 steel according to expected life, surface requirements, and production volume.
Typical project range
| Specification | PartsMake Capability |
|---|---|
| Molding tolerance | ±0.05–0.20 mm; precision down to ±0.03 mm |
| Recommended wall thickness | 1.0–3.0 mm; 0.5 mm minimum subject to geometry |
| Draft angle | 0.5°–2° depending on texture and depth |
| Mold life | 10,000 to 1,000,000+ cycles |
| Surface finish | SPI A1–D3, VDI, and custom textures |
| Mold base systems | LKM, DME, or equivalent systems |
Resin selection
Compare materials before the mold is cut
Material selection affects shrinkage, processing window, dimensional stability, wear, appearance, and total part cost. The values below are typical engineering ranges; the final recommendation depends on grade, filler content, geometry, tooling, and conditioning.
| Resin | Typical shrinkage | Typical wall | Melt temperature | Dimensional stability | Common applications |
|---|---|---|---|---|---|
| ABS | 0.4–0.7% | 1.5–3.0 mm | 220–260°C | Good; low moisture sensitivity | Housings, enclosures, consumer parts |
| PC | 0.5–0.7% | 1.5–3.5 mm | 280–320°C | Good; drying is critical | Transparent covers, guards, structural shells |
| PC/ABS | 0.4–0.7% | 1.5–3.0 mm | 240–280°C | Good balance of heat and impact | Automotive and electronics housings |
| PP | 1.0–2.5% | 1.0–3.0 mm | 200–240°C | Moderate; higher shrinkage | Consumer components, living hinges, containers |
| POM | 1.5–2.2% | 1.5–3.0 mm | 190–220°C | Good; low friction and creep | Gears, bushings, precision mechanisms |
| PA / Nylon | 1.0–2.5% | 1.0–3.0 mm | 240–290°C | Variable; moisture affects dimensions | Clips, bearings, structural components |
| PBT | 1.5–2.2% | 1.0–2.5 mm | 240–270°C | Good; stable electrical performance | Connectors, switches, electrical parts |
Defect prevention
Solve molding risks at the design stage
A strong DFM review connects plastic structure, flow behavior, cooling, and inspection requirements before tooling begins. Select a defect category to see the engineering response.
Core DFM checks
- 01 Wall thickness and transition control
- 02 Rib, boss, and draft review
- 03 Gate, vent, and cooling strategy
- 04 Shrinkage compensation and inspection datums
01 / Sink marks
Keep ribs and bosses from becoming thick spots
Maintain a nominal wall of 1.0–3.0 mm where possible, keep ribs near 40–60% of the adjoining wall thickness, and use coring to reduce local mass. Gate location, pack pressure, and cooling time are then tuned to control volumetric shrinkage.
02 / Warping
Balance cooling and material orientation
Balanced cooling channels, consistent wall transitions, suitable gate positioning, and material-specific shrinkage compensation help control distortion. Glass-filled grades require additional attention to fiber orientation and anisotropic shrinkage.
03 / Weld lines
Make melt fronts meet where strength and appearance allow
Gate placement and flow analysis are used to move weld lines away from high-load or cosmetic areas. Injection speed, melt temperature, venting, and local geometry can be adjusted so fronts meet at a stable temperature.
04 / Gas traps
Vent trapped air before it becomes burning or short shots
Strategic vents at end-of-fill locations, suitable vent depth, and controlled injection pressure reduce trapped gas and the localized burning known as the diesel effect. Overflow wells may be considered for difficult flow fronts.
Beyond standard molding
Build the finished component, not just the molded shell
Specialized molding and secondary operations can simplify assembly, improve product feel, and reduce the number of downstream suppliers.
01
Insert molding
Integrate brass or stainless steel threaded inserts during the molding cycle for strong pull-out performance and consistent positioning.
02
Overmolding
Combine a rigid substrate with a soft-touch TPU or TPE grip in a coordinated production sequence.
03
Secondary finishing
Add painting, laser marking, and full assembly so your parts arrive ready for integration.
Technical workflow
From CAD review to controlled production
DFM and feasibility
Review wall thickness, draft angles, ribs, bosses, parting lines, gate locations, and expected flow behavior.
Tooling strategy
Select steel, mold base, cavity count, cooling approach, and surface finish according to volume and product requirements.
Trial and correction
Validate first shots, dimensional results, cosmetic standards, and process settings before production approval.
Scale with confidence
Move from bridge molds for 100-part market trials to high-cavity tooling for sustained volumes above 1,000,000 units.
Quality assurance
Inspection tied to function and appearance
Dimensional verification is performed against technical drawings using precision metrology equipment. Cosmetic standards are managed against your specified SPI or VDI surface finish requirements.
Dimensional checks
Critical features and drawing datums
Cosmetic checks
Texture, gloss, marks, and flash
Material control
Resin grade and drying requirements
Production consistency
Process and batch verification
Start your project
Request a technical quote
Send your STEP or IGS files together with resin requirements, annual volume, and surface finish specifications. Our engineering team typically responds within 24–48 hours with a feasibility assessment and preliminary production plan.
PartsMake
Tell us about your molding requirements
Include the part material, expected quantity, critical dimensions, finish, and target launch timing in your inquiry.