1.How do you ensure quality control in plastic injection molding?

We are a ISO 9001 certificated company. We ensure quality control in plastic injection molding through a multi-faceted approach which includes material testing, precise machine calibration, meticulous mold design and maintenance, and stringent inspection processes.

2. How do the DFM report work?

A Design for Manufacturability (DFM) report is a crucial document that evaluates the manufacturability of a product's design, aiming to identify and address potential manufacturing issues before they arise. Reports help identify and address potential issues early in the design phase, preventing costly changes later. Cost Efficiency: By optimizing designs for manufacturability and testability, reports help reduce production costs and increase yield. Quality Assurance: Thorough testing ensures that the final product meets quality standards and performs reliably.

3. What is the typical lead time for injection molding?

Mold fabrication usually takes 4–8 weeks, while production lead time depends on part complexity and quantity.

4. What is the difference between a prototype mold and a production mold?

Prototype molds are faster and cheaper, often using aluminum; production molds use hardened steel for high-volume runs.

5. Can you do small batch injection molding?

Yes. With standardized tooling and soft molds, small batches (hundreds to thousands) are feasible.

Top Quality Plastic injection molding Supplier

Comprehensive Molding Capabilities

Injection molding is the main process for high-precision and large-scale plastic production. Based on different application needs, we classify plastic molds as follows:

Runner System

Rich experience in bothcold runnerandhot runnersystems, to balance mold and part costs effectively.

Cavity Count

Fromsingle-cavity(for small quantities) tomulti-cavitymolds designed for high-volume mass production with consistent quality.

Molding Process

Expertise in molding includingsingle-shot, two-shot/multi-shot, stack molding, and gas-assisted molding for complex parts.

Automation Level

Ranging frommanualtosemi-automaticandfully automaticproduction.

Special Processes

Specializedmolding process such asinsert moldingandover molding.

The Materials We Work With

You have a wide requirement for materialsininjection molding. Yixing Technology can supports a widely range of plastics and elastomers:

LDPE

HDPE

TPE

PA6

PA12

PA66

PA66+30GF

PP+30GF

TPU

TPR

ABS

EVA

PC/ABS

PLA

POM

ASA

PPS

PEEK

TEFLON

Industries We Serve

Delivering precision plastic components across diverse sectors.

Electronic Product

Automotive Component

Medical Device

Home Appliance

Building Materials Parts

Smartphone Accessories

Other Industrial Plastic Parts

General Tolerance for Injection Molding

Injection molding tolerances are essential for ensuring the quality and functionality of molded parts. They can be divided into commercial and fine tolerances, depending on the level of precision required, which also influences the cost level.

Commercial Tolerances

Commercial tolerances are less precise, involving lower-cost molds and producing more affordable parts.

Fine Tolerances (Precision)

Fine tolerances (precision tolerances) offer a tighter tolerance range, which increases the cost of both the mold and the parts. Normally for mating components and high-precision assemblies.

Note:Specific tolerance standards (such as ISO 2768 or DIN 16901) can be discussed based on your project requirements. All values are in millimeters (mm).

Table 1: Dimensional Tolerances (mm)

Dimensional tolerances for common engineering plastics across different size ranges.

Table 1: Dimensional Tolerances by Material
Material	Commercial Tolerance				Fine Tolerance
Material	1–20 mm	21–100 mm	101–160 mm	+20 mm beyond 160	1–20 mm	21–100 mm
ABS	0.100	0.150	0.325	0.080	0.050	0.100
ABS/PC	0.100	0.150	0.325	0.080	0.050	0.100
HDPE	0.125	0.170	0.375	0.100	0.075	0.110
LDPE	0.125	0.170	0.375	0.100	0.075	0.110
PA (Nylon)	0.075	0.160	0.310	0.080	0.030	0.130
PA GF 30%	0.060	0.120	0.240	0.080	0.030	0.100
PC	0.075	0.120	0.250	0.080	0.050	0.080
PMMA	0.075	0.120	0.250	0.080	0.050	0.070
POM	0.075	0.160	0.310	0.080	0.030	0.130
PP	0.125	0.170	0.375	0.100	0.075	0.110
SAN	0.100	0.150	0.325	0.080	0.050	0.100

Table 2: Straightness & Flatness Tolerances (mm)

Flatness and straightness specifications for precision-critical applications.

Table 2: Straightness/Flatness Tolerances
Material	Commercial Tolerance		Fine Tolerance
Material	0–100 mm	101–160 mm	0–100 mm	101–160 mm
ABS	0.380	0.800	0.250	0.500
ABS/PC	0.380	0.800	0.250	0.500
PA (Nylon)	0.300	0.500	0.150	0.250
PA GF 30%	0.150	0.200	0.080	0.100
PC	0.250	0.450	0.120	0.200
POM	0.300	0.500	0.150	0.250
PP	0.850	1.500	0.500	0.850
SAN	0.380	0.800	0.250	0.500

Table 3: Hole Diameter Tolerances (mm)

Precision hole tolerances for mating components and assemblies.

Table 3: Hole Diameter Tolerances by Size Range
Material	Commercial Tolerance				Fine Tolerance
Material	≤3	3.1–6	6.1–14	14–40	≤3	3.1–6	6.1–14	14–40
ABS	0.050	0.050	0.080	0.100	0.030	0.030	0.050	0.050
ABS/PC	0.050	0.050	0.080	0.100	0.030	0.030	0.050	0.050
HDPE	0.050	0.080	0.100	0.150	0.030	0.050	0.050	0.080
LDPE	0.050	0.080	0.100	0.150	0.030	0.050	0.050	0.080
PA (Nylon)	0.050	0.080	0.080	0.130	0.030	0.040	0.050	0.080
PA GF 30%	0.050	0.050	0.080	0.080	0.030	0.040	0.050	0.050
PC	0.050	0.050	0.080	0.080	0.030	0.040	0.050	0.050
PMMA	0.080	0.080	0.100	0.130	0.030	0.050	0.050	0.080
POM	0.050	0.080	0.080	0.130	0.030	0.040	0.050	0.080
PP	0.050	0.080	0.100	0.150	0.030	0.050	0.050	0.080
SAN	0.050	0.050	0.080	0.100	0.030	0.030	0.050	0.050

Our Quality Assurance

With 20 years of experience developing thousands of new injection molding products, here's what we do to ensure quality.

Reduce Shrinkage

Our engineers scientifically calculate shrinkage rates based on material properties, ensuring finished parts meet exact dimensional requirements.

Optimized Ejection Systems

We design reasonable draft angles and ejection mechanisms for smooth, damage-free part ejection. This improves surface quality.

Balanced Wall Thickness

Using Moldflow software to analyze thickness impacts, our mold designs reduce common defects such as sink marks for high-quality parts.

Reduce Weld Lines

Through reasonable injection gate location and venting layouts, the injection parts have a more beautiful surface appearance.

High-Efficiency Cooling

Excellent cooling channel designs achieve uniform and rapid cooling. This reduces cycle times and improves production efficiency.

Our Workflow

A transparent, step-by-step process from design to delivery.

Stage 1: R&D Support

We support customer R&D. Create the files or improve the design if needed (UG, SolidWorks, ProE, Auto CAD etc.)

Stage 2: Mold Process

Mold design (MDF report) → check/approve → approved → make mold → produce sample → sample confirmed → check final mold quality ready to export.

Stage 3: Sample Modification

If the first sample does not satisfy the customer, we can modify the mold to meet customers' requirements.

Stage 4: Sample Delivery

Produce the customer's requested quantity, free shipping.

Stage 5: Final Delivery

Deliver goods by sea or by air; special requirements can be accommodated based on customer demands.

Why Choose Yixing Technology?

Partner with a trusted leader in precision injection molding.

20+ Years Experience

More than 1500 new injection molds and parts have been successfully produced since 2006.

ISO9001 Certified

Strict quality control system, providing ROHS/CE certification for your peace of mind.

One Stop Service

More value-added operations provided to simplify your supply chain from design to delivery.

Industry Leading Plastic Injection Molding Services