Plastic Household Molding

Q: 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.

Q: 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.

Q: 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.

Q: 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.

Q: 5. Can you do small batch injection molding?

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

Injection Molding for Daily Consumer Goods

High volume, superior surface finish. We provide professional mold solutions for high-volume consumer goods such as hangers, cups, basins, kitchen parts, and storage boxes, with outstanding design focused on maximizing output, efficiency, and cosmetic surface quality.

Common Plastics for Daily-Use Products — Performance Comparison

Material	Heat Resistance (Long-term / Short-term)	Transparency	Food-Grade Compliance (FDA/EU/LFGB)	Typical Daily-Use Products
PP (Polypropylene)	Long-term 100–110°C, short-term up to 135–140°C	Translucent, glossy	FDA (21 CFR 177.1520), EU (10/2011), LFGB — all compliant	Microwave food containers, water cups, basins, bottle caps, food storage boxes
PE (Polyethylene)	Long-term 70–80°C, short-term max 100°C; HDPE up to 120°C	Translucent to opaque	FDA (21 CFR 177.1520), EU (10/2011), LFGB — all compliant	Plastic bags, cling film, shampoo bottles, medicine bottles, cutting boards
ABS	Long-term 75–80°C, short-term 90–100°C	Opaque (transparent grades can reach 92% light transmission)	FDA (21 CFR 180.22/181.32), EU, LFGB — food-grade grades required	Appliance housings, toys, luggage, razor housings, LEGO bricks
AS / SAN	Heat deflection temperature 82–105°C	High clarity, colorless transparent resin	Food-grade compliance depends on specific grade; confirm FDA/EU certificates	Clear water cups, cosmetic containers, toothbrush handles, refrigerator drawers
PET	Long-term 120°C (engineering grade); standard bottle grade deforms at 60–70°C	High clarity, up to 90% light transmission	FDA, EU, LFGB compliant (food-grade grades)	Mineral water bottles, beverage bottles, cooking oil bottles, clear storage boxes
Tritan	HDT 99–109°C (at 0.455 MPa)	High clarity, 91% light transmission	Mainstream grades FDA, EU compliant; LFGB — confirm specific grade	Sports water bottles, baby bottles, blender jars, space cups

Selection Guidelines

For microwave heating / hot water: Choose PP — highest heat resistance and the most established food-grade compliance.
For clarity + impact resistance: Tritan is the BPA-free alternative to PC, with excellent impact strength; AS offers high clarity but moderate toughness.
For ultimate clarity + low cost: PET dominates the bottle market, but note its heat resistance is only 60–70°C — not suitable for hot water or microwaving.
For structural strength / appearance parts: ABS offers the best overall balance, but food-grade grades must be selected for food contact.
Food-grade compliance note: "Food-grade" for any of these materials depends on the specific grade. Always request the corresponding FDA, EU 10/2011, or LFGB compliance statement from the supplier — never judge by material name alone.

Surface Finish Comparison & Recommended Daily-Use Plastic Parts

Surface Finish	SPI Grade / VDI Number	Surface Characteristics	Ra Reference (μm)	Typical Daily-Use Plastic Parts	Recommended Materials
High-Gloss Mirror	SPI A-1 / VDI 12	Mirror-grade high gloss; suitable for optical clear parts	0.012–0.025	Clear cups/storage boxes, cosmetic housings, display stands, LED lenses	Acrylic (PMMA), PC
High Gloss (General)	SPI A-3 / VDI 12–15	Standard high gloss; more forgiving than A-1	0.05–0.10	Remote control panels, small appliance housings, glossy toy parts	ABS, PS, Nylon, PC
Texture / Leather Grain	VDI 3400 Number / VDI 24–33	Fine to standard leather grain; excellent defect hiding	1.6–6.5	Toolbox housings, storage boxes, electronic device housings, faux leather products	ABS, PP, HDPE
Matte	SPI C-1 ~ C-3 / VDI 18–27	Satin/matte finish; low reflectivity	0.35–0.70 (Grade C)	Appliance panels, mouse/keyboard housings, industrial-style storage boxes	ABS, PP, PS, HDPE
Clear Part Defect-Free Polish	SPI A-1	No flow lines, bubbles, or inclusions	0.012–0.025	Clear water bottles, display windows, transparent filter housings, lenses	PC, Acrylic (PMMA)
Anti-Slip Texture	VDI 33–45 / SPI D-2~D-3	Coarse sand grain/deep grain feel; strong grip	4.5–18.0+	Tool handles, anti-slip pads, trash bin housings, outdoor equipment grips	PP, HDPE, TPU

Selection Guidelines

High-Gloss Mirror: A-1 is the most demanding in terms of material. Acrylic and PC are the top choices. PP and HDPE are generally not recommended because their flow and crystallization characteristics make true mirror finishes very difficult to achieve.

Clear Parts: Beyond proper polishing, the material itself must have high light transmission. PC offers good toughness, but mediocre scratch resistance; PMMA (acrylic) has the best optical properties but is brittle. Choose based on the application.
Texture / Leather Grain: The higher the VDI number, the coarser the texture. Draft angles must increase accordingly (≥3° recommended for VDI 33 and above), or the texture will be torn during ejection.
Anti-Slip Texture: TPU and soft PP are common choices for anti-slip parts, but the deeper the texture, the harder demolding. Both mold design and injection parameters need to match.

Molding Secondary Operations & Decoration Capabilities

Once the part comes out of the mold, there is a whole range of finishing and assembly options we can handle. Here is what we offer:

IMD / IML (In-Mold Decoration / In-Mold Labeling)

You place the graphic or label in the mold before injection. The resin flows behind it and fuses with the film, so the decoration becomes part of the part itself. No post-painting, no peeling off. Great for appliance panels, automotive interior trim, and consumer electronics housings.

Silk Screen Printing

Classic and reliable. We print directly onto the molded surface — logos, icons, text, whatever you need. Works well on flat or gently curved surfaces. Cost-effective, fast, and clean in appearance.

Hot Stamping (Foil Stamping)

For a shiny metallic or holographic look, hot stamping is the answer. A heated die presses foil onto the part surface, transferring the metallic layer. Ideal for premium branding, cosmetic packaging, and applications requiring a decorative finish.

Electroplating

For a true mirror-chrome or metallic finish, electroplating is the way to go. We plate the plastic part with a thin metal layer — usually copper, nickel, or chrome. Common on automotive grilles, bathroom fixtures, and high-end consumer products. Note that it is not the most economical option, and the part design needs to be plating-friendly.

Assembly & Kitting

We do not just mold parts — we can assemble them too. Ultrasonic welding, snap-fit, screw assembly, adhesive bonding — whatever the design calls for. If you need multiple parts packaged together as a kit, we can handle that as well. You receive one box, everything inside, ready for your production line or the shelf.

You do not need to juggle five different suppliers for molding, decorating, and assembly. We handle it all under one roof, which saves you time, freight, and a whole lot of headaches.

Our Workflow

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

Stage 1: R&D SupportWe support customer R&D. Create the files or improve the design if needed (UG, SolidWorks, ProE, AutoCAD, etc.).
Stage 2: Mold ProcessMold design (DFM report) → check/approve → make mold → produce sample → sample confirmed → check final mold quality ready to export.
Stage 3: Sample ModificationIf the first sample does not satisfy the customer, we can modify the mold to meet customer requirements.
Stage 4: Sample DeliveryProduce the customer's requested quantity, free shipping.
Stage 5: Final DeliveryDeliver goods by sea or by air; special requirements can be accommodated based on customer demands.

Why Choose Yixing Technology?

Multi-cavity molds for High-Volume Production – Using high-grade, long-life steels (such as S136, H13) to ensure flawless performance over tens of millions of cycles. We strategically select based on cost-effectiveness.
Material cost save – Using hot runner systems with robot arm, this injection molding process is ideal for fully automated production, maximizing the savings of materials and labor costs.
Expert in Achieving Cosmetic Surface Finishes – Excellent at getting the cosmetic surface for consumer products. Capabilities range from defect-free mirror polishing for transparent parts to precisely controlled texturing for anti-slip grip.
Reliable ejection design – By combining ejector pins, stripper plates, and air-assist methods, we guarantee reliable ejection, even for deep-cavity parts. We ensure a smooth surface.
Working with many kinds of materials – Expertise extends to materials like PP, PE, and ABS, etc. By precise venting design to eliminate gas traps and accurate shrinkage compensation, we ensure consistent dimensional stability and prevent common molding defects.

Our Comprehensive Mold Solution for Typical Products

Toothbrush Handles: Multi-cavities with hot runner injection molds with micro ejector pins for delicate, textured parts.
Cups & Containers: Mirror-polished cavities combined with efficient stripper plate ejection for cosmetic surface.
Hangers: Multi-cavity molds with integrated side-action cores for high-volume, cost-effective production.
Large Thin-Walled Parts (Basins/Trash Cans): Engineered with large hot runner systems, enhanced venting, and use a robot arm to eject, all of which can help minimize deformation and ensure sizes.

With a focus on mold solutions for many years, we provide cost-effective, long-life molds that help our customers achieve stable, high-quality production at the lowest cost.