Mold for plastic collars

We specialize in custom mold development for plastic collars, plastic collar component production, and optional assembly services—not finished product trading. Our molds are engineered to match plastic collars’ unique needs (e.g., precise inner hole fit, axial positioning stability, component protection) , with tailored designs, durable material compatibility, and optimized injection molding to deliver reliable plastic collar parts for machinery, electronics, plumbing, and automotive applications.

1. Custom Mold Structures: Tailored to Plastic Collar Requirements

Plastic collars (e.g., mechanical shaft collars, electronic component spacing collars, pipe insulation collars) demand high inner hole precision for shaft/pipe，structural stability for axial positioning, and often protective or sealing features—our mold structures are customized to address these key demands:

Cavity & Core: Machined via ultra-precision CNC turning/milling (tolerance as tight as ±0.005mm) to replicate critical features:

Inner hole precision (diameter tolerance ±0.008mm, roundness ≤0.005mm) to ensure seamless fit with shafts/pipes (e.g., 5–50mm diameter shafts for machinery)—prevents radial movement or wobbling during use.

Axial positioning structures (e.g., step-like shoulders with height tolerance ±0.01mm, anti-slip inner rings) to fix the collar’s position on shafts/pipes—critical for spacing collars (maintaining component gaps) or stop collars (preventing axial displacement).

Protective/insulating designs (e.g., thickened outer walls 1–3mm for impact protection, hollow structures for heat insulation) to shield underlying components (e.g., electronic sensors, pipe joints) from damage or temperature changes.

Installation-friendly features (e.g., split slots for easy assembly, screw holes with thread tolerance ±0.01mm for locking) to simplify on-site mounting without damaging shafts/pipes.

Gating System: Designed to avoid weakening inner hole precision and structural integrity:

Edge gates (positioned at non-functional outer edges) for small-to-medium collars (e.g., electronic spacing collars)—minimizes weld lines in inner hole areas, which would affect fit accuracy (a major risk for precision mechanical collars).

Hot runner systems (for large or multi-cavity collars, e.g., bulk pipe insulation collars) to maintain consistent melt temperature—reduces material waste by 18–25% and ensures uniform wall thickness (critical for maintaining structural stability and insulation performance).

Cooling System: Optimized for collars’ cylindrical/annular structures:

Concentric cooling channels (matching collar inner/outer diameters) to ensure even heat dissipation—prevents inner hole deformation (e.g., ovality) that ruins shaft/pipe fit and reduces cycle time by 30–40%.

Targeted cooling for step shoulders or thickened walls—avoids shrinkage that compromises axial positioning accuracy (e.g., shoulder height variation ≤0.01mm for spacing collars).

Ejection System: Calibrated to protect inner hole precision and cylindrical shape:

Ejector rings (for cylindrical collars) to distribute ejection force evenly—prevents inner hole scratching or outer surface deformation, ensuring the collar’s roundness and fit performance.

Stripper plates (for collars with complex step structures) to avoid damaging positioning shoulders—preserves the collar’s axial positioning function.

2. Suitable Plastic Materials: Matched to Plastic Collar Applications

Plastic collars face axial/radial stress, environmental exposure (moisture, temperature, chemicals), and component protection demands—we select materials based on fit stability, durability, and use scenarios:

PP (Polypropylene): Ideal for general-purpose collars (e.g., light-duty pipe spacing collars, home appliance component collars). Offers good chemical resistance (to water, mild detergents), moderate rigidity (Shore D 60–70), and cost-effectiveness—suitable for low-stress, indoor scenarios (axial load ≤50N).

ABS (Acrylonitrile Butadiene Styrene): Used for precision electronic collars (e.g., circuit board spacing collars, connector positioning collars). Boasts high dimensional stability (shrinkage 1.5–2.5%), good impact resistance (15–20 kJ/m²), and compatibility with electronic assembly processes—ensures consistent inner hole fit for small shafts (≤10mm diameter), ideal for indoor electronic devices.

PA66 + Glass Fiber (20–30% GF): Perfect for high-stress mechanical collars (e.g., industrial machine shaft collars, automotive drive shaft collars). Reinforced with glass fiber to boost tensile strength (up to 80 MPa) and heat resistance (up to 120°C)—supports axial loads ≤500N and withstands industrial temperatures, suitable for machinery and automotive use.

PVC (Polyvinyl Chloride): Great for pipe insulation/protection collars (e.g., plumbing pipe collars, HVAC duct collars). Features good weather resistance (no UV yellowing) and chemical resistance (to acids, alkalis)—insulates pipes from temperature changes and protects against corrosion, ideal for indoor/outdoor plumbing or HVAC systems.

POM (Polyoxymethylene): Suitable for low-friction, precision-fit collars (e.g., sliding mechanical collars, bearing spacing collars). Offers high dimensional accuracy (inner hole tolerance ±0.005mm) and low friction coefficient (0.15–0.3)—ensures smooth shaft sliding (when needed) and long-term fit stability, ideal for mechanical assemblies with moving parts.

3. Injection Molding Process: Optimized for Plastic Collar Quality

Our injection molding process is fine-tuned to meet plastic collars’ fit precision, structural stability, and protective demands, with key advantages:

Inner Hole Fit Precision:

Injection parameters (temperature 180–260°C, pressure 60–100 MPa) optimized to enhance material uniformity—no internal voids in inner hole walls, ensuring each collar’s inner diameter meets tight tolerance (variation ≤0.008mm), avoiding shaft/pipe binding or looseness.

Post-molding inner hole gauging (via precision plug gauges) to verify fit—defect rate for precision collars kept below 0.2%, critical for machinery or automotive applications where fit accuracy affects safety.

Structural & Protective Performance:

Axial load testing (for mechanical stop collars) to confirm they withstand 1.5× rated load without deformation—prevents collar failure and component displacement during operation.

Insulation/chemical resistance testing (for pipe collars) to ensure compliance with industry standards (e.g., ASTM D2240 for hardness, ISO 10366 for chemical resistance)—guarantees long-term protection of underlying components.

Efficient Production:

Multi-cavity molds (32–64 cavities for small collars, e.g., electronic spacing collars) maximize output—daily production reaches 80,000–120,000 components, meeting high-volume demands for automotive or electronics industries.

Automated sorting and inner hole inspection—reduces labor costs and ensures only collars with qualified fit precision enter the next process.

Cost Optimization:

Hot runner systems reduce material waste—especially for high-cost materials like PA66+GF or POM, cutting per-unit cost by 12–18% for large orders (100,000+ collars).

Integrated molding of step shoulders, screw holes, or split slots—eliminates post-processing (e.g., secondary drilling or slotting), reducing production time and costs.

4. Our Services: Beyond Molds—Plastic Collars & Assembly

We provide end-to-end solutions for plastic collar production, not just molds:

Plastic Collar Manufacturing: Produce custom collars in various sizes (inner diameter 3–50mm, outer diameter 8–80mm, height 2–20mm), designs (solid, split, stepped), and specifications (customized to your shaft/pipe dimensions). Supports custom colors (RAL/Pantone codes) and surface treatments (anti-corrosion coating for industrial collars, anti-static coating for electronic collars).

Value-Added Assembly: Optional assembly services for collar sub-assemblies—e.g., attaching rubber O-rings (for sealing pipe collars), assembling collar sets with locking screws (for mechanical shaft collars), or integrating foam insulation (for pipe temperature protection). Delivers ready-to-install sub-assemblies, saving your production time.

Custom Design Support: Offer 3D mold design and rapid prototyping (via injection molding or CNC machining). We can produce 30–50 prototype collars in 2–3 days for you to test inner hole fit, axial load resistance, and installation convenience—optimizing the mold design before mass production.components). Reinforced with glass fiber to enhance tensile strength (up to 60 MPa) and reduce shrinkage (1.0–1.5%)—suitable for load-bearing ABS parts requiring dimensional precision.

High-Gloss ABS: Suitable for aesthetic parts (e.g., cosmetic packaging, audio device panels). Features a polished surface finish (no post-processing needed)—leverages ABS’s ability to retain high gloss, ideal for consumer goods where appearance is critical.

3. ABS Injection Molding Process: Optimized for Performance

Our injection process is fine-tuned to maximize ABS’s properties, with key advantages:

Precision & Consistency:

Melt temperature control (220–260°C) to ensure ABS flows evenly—avoids cold slugs or burn marks.

Injection pressure (70–100 MPa) calibrated for ABS’s viscosity—ensures full cavity filling without excessive stress (which can cause part warping).

Dimensional tolerance control (±0.03mm for small parts) via servo-driven machines—critical for ABS components requiring tight fits (e.g., electronic connectors).

Surface Quality:

Mold cavity polishing (Ra ≤0.2μm for high-gloss parts) to eliminate defects—ABS’s excellent surface reproduction ensures no visible blemishes.

Weld line reduction (via gate placement and melt temperature optimization)—improves strength and appearance of ABS parts with complex geometries.

Efficiency:

Cycle time optimization (20–40 seconds per part) via targeted cooling—balances production speed with ABS’s cooling requirements.

Multi-cavity molds (8–32 cavities for small parts, e.g., buttons) to boost output—ABS’s good flow supports uniform filling across multiple cavities, with daily production up to 50,000 parts for standard designs.

Cost-Effectiveness:

Hot runner systems reduce material waste (15–20%)—minimizes scrap from cold runners, lowering per-unit costs for high-volume ABS parts.

Integrated molding of features (e.g., ribs, bosses) eliminates post-processing—cuts labor costs and ensures consistent quality.

4. Our Services: Beyond Molds—ABS Components & Assembly

We provide end-to-end solutions for ABS production, tailored to your needs:

ABS Component Manufacturing: Produce custom ABS parts in sizes (5×5mm to 500×300mm), shapes (complex geometries, thin walls down to 0.8mm), and finishes (glossy, matte, textured). Supports color matching (RAL/Pantone codes) and post-processing (painting, plating, printing) to enhance ABS’s aesthetic appeal.

Value-Added Assembly: Optional assembly services for ABS sub-assemblies—such as attaching metal inserts (for strength), bonding ABS parts with adhesives, or integrating non-ABS components (e.g., rubber gaskets, electronic modules). Delivers ready-to-integrate sub-assemblies, saving your production time.

Custom Design Support: Offer 3D mold design and ABS prototyping (via CNC machining or injection molding). We produce 10–50 prototype parts in 3–5 days to test ABS’s performance (impact resistance, fit) and optimize the mold design before mass production.

We are plastic mold maker and can provide custom mold service, we can make injection molds, blow molds, rotational molds and die-casting molds.

For custom injection molds, we can provide professional custom injection molding services. Usually Plastic injection mold manufacturing Molding are manufactured using injection molding technology. The mold materials for injection molds can be chosen from P20, 718, S136, H13 and so on. The mold material reflects the mold life and product material requirements.

For parts that require blow molding production, we can also provide professional custom blow molding services.

Plastic injection mold manufacturing Injection Mould making

1.We communicate product design according to samples/drawings and your requirements.

2.After the product design is confirmed, we carry out the mold design, we provide all kinds of injection molds, blow molds, silicone molds, die-casting molds services.

3.Material procurement, steel cutting and mold basic tools.

4.Mold assembly

5.Mold inspection, tracking and controlling mold processing.

6. We will inform you the date of mold trial and send you the sample inspection report and injection parameters together with the sample.

7.Your instruction and confirmation of shipment.

8.Prepare the mold before packing.

Plastic injection mold manufacturing molding Specification

1. Professional manufacturer, design, production injection mould and stamping mould quality control

2. rich export experience plastic injection mould and stamping mould

3. Reasonable price of design mould

4. Cavities: single or as per your requirements cavity

5. Treatment: S45C Pretreat>25Hrc,And Nitriding

6. Mould Steel: Cavity ,Core and slide: P20 ,2738,2136 available Moldbase :LKM available

7. Standard:DEM ,HUSKY,available

8. Hot runner: according to your demand

9. Life time: >300 Thousand Times

10. Package: Plywood case, anti-rust paint

Mold design：

Information you need to provide us

1. If you have drawings, 2D drawings, 3D drawings (preferably in STEP format).

2. If there are no drawings, you need to provide specific length, width, height and weight information. (It’s best to send us samples)

3. Should the mold be sent to your country, or leave the mold in our factory and we will help you produce the product.

4. Mold material requirements, cavity number requirements (you can tell us about the size of your injection molding machine)

5. Product material requirements and product quantity. (You can tell us about the use of the product and we can give you suggestions)

Transaction process:

Mold testing：

Once the mold is complete, I do a mold test. It usually takes about 3-5 days to complete. We need to assemble the mold, adjust the pressure data of the machine, and try production. We need to check whether there are problems during the normal production of the mold and make modifications.

Product packaging

Packaging according to your needs

1.By air ,it takes 3-7 days for delivery .The goods can be shipped by DHL ,Fedex ,UPS .

2.By sea ,the delivery time is based on your port .

To South East Asian Countries takes about 5-12 days

To Middle east countries takes about 18-25 days

To European countries takes about 20-28 days

To American countries takes about 28-35 days

To Australia takes about 10-15 days

To African countries takes about 30-35 days.

Factory

Video-1: (Factory Video)

Video-2: (Injection Molding)

Video-3: (Blow molding)

Video-4: (Blow molding)

Video-5: (Roll molding)

Customer satisfaction is our most important goal. We focus on communication and cooperation with our customers, always pay attention to their needs and provide quick response and quality customer service. Our injection production mold factory is committed to establishing long-term relationships and ensuring that our customers receive the best after-sales service during the purchase and use of our products, and we will definitely do our best to solve any problems for our customers.

FAQ

1. Who are we?

We are based in Zhejiang, China, start from 2014,sell to North America(30.00%),Southern Europe(10.00%),Northern.

Europe(10.00%),Central America(10.00%),Western Europe(10.00%),Mid East(10.00%),Eastern Europe(10.00%),South America(10.00%). There are total about 51-100 people in our office.

2. How can we guarantee quality?

Always a pre-production sample before mass production;

Always final Inspection before shipment.

3. What can you buy from us?

Mould,Plastic Product, Metal Product,Dental Product,CNC machining.

4. Why should you buy from us not from other suppliers?

Ningbo P&M Plastic Metal Product Co., Ltd. We main do all kinds of 3d design, 3d printing and plastic metal molds tooling and products. We have our own engineer and factory. One-stop supply:3d design - 3d printing - mold making - plastic injection.

5. What services can we provide?

Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA,DDP,DDU;

Accepted Payment Currency:USD,EUR;

Accepted Payment Type: T/T,L/C,PayPal,Western Union,Escrow;

Language Spoken:English,Chinese,Spanish,French,Russian.

6. What are the characteristics of your service?

1. Your inquiry related to our products or prices will be replied within 24hours.

2. Welltrained and experienced staffs to answer all your enquiries in fluent English.

3. Offering the support to solve the problem in the application or selling period.

4. Competitive prices based on same quality.

5. Guarantee samples quality same as mass production quality.