Mold for plastic spacers

We specialize in custom plastic spacer mold development, plastic spacer component production, and optional assembly services—not finished spacer trading. Our molds are engineered to match your spacer’s unique requirements (e.g., ultra-thin thickness, precise hole positioning, insulation/anti-slip functions) , with tailored structures, material compatibility, and optimized injection molding to deliver high-quality plastic spacer parts.

1. Custom Mold Structures: Tailored to Spacer-Specific Requirements

Plastic spacers are typically thin (0.2–5mm) with high demands for flatness and hole precision—our mold structures are customized to address these needs:

Cavity & Core: Machined via high-precision CNC grinding (tolerance as tight as ±0.02mm for thickness, ±0.01mm for hole diameter) to ensure uniform spacer thickness (no "waviness") and accurate hole positioning (critical for assembly with screws/bolts). For spacers with multiple holes, the mold’s hole core pins are calibrated to ±0.005mm to avoid misalignment.

Gating System: Designed for thin spacer filling—micro pin gates (diameter 0.5–1mm) or edge gates (positioned at non-functional edges) are used to minimize pressure loss and avoid sink marks. For ultra-thin spacers (≤0.5mm), hot runner systems are optional to maintain stable plastic flow, reducing material waste by 12–18%.

Cooling System: Optimized for thin, flat parts—parallel cooling channels (spaced 8–12mm apart) ensure even heat dissipation. This prevents warping (a major issue for thin spacers) and reduces cycle time by 20–30%, as thin parts cool faster with uniform temperature control.

Ejection System: Uses ultra-thin ejector pins (diameter 1–2mm) or stripper plates to avoid damaging delicate spacers. Ejector pins are arranged in a matrix (density based on spacer size) to ensure balanced force—preventing deformation during part removal.

2. Suitable Plastic Materials: Matched to Spacer Functions

Plastic spacers serve diverse roles (insulation, buffering, spacing, wear resistance)—we select materials based on your specific application:

PP (Polypropylene): Ideal for general-purpose spacers (e.g., electronics internal spacing, household appliance padding). Offers good chemical resistance (to oils/water), low cost, and excellent insulation—suitable for non-high-temperature, low-wear scenarios.

ABS (Acrylonitrile Butadiene Styrene): Used for structural spacers (e.g., automotive interior brackets, furniture assembly spacers). Provides moderate rigidity (Shore D 75–80), impact resistance, and easy post-processing (e.g., drilling additional holes)—supports load-bearing needs.

PC (Polycarbonate): Perfect for high-temperature or transparent spacers (e.g., LED light fixtures, industrial control panels). Features heat resistance (up to 130°C), high transparency (85–90% light transmittance), and shatterproof properties—suitable for harsh environments.

POM (Polyoxymethylene): Great for wear-resistant spacers (e.g., mechanical sliding parts, bearing spacers). Boasts low friction coefficient (0.15–0.3) and high dimensional stability—withstands repeated friction without deformation, extending service life.

TPU (Thermoplastic Polyurethane): Suitable for buffer or anti-slip spacers (e.g., phone case padding, tool handle spacers). Offers elastic feel (Shore A 60–80), good shock absorption, and anti-slip texture—reduces vibration or slippage.

FR-ABS/FR-PC (Flame-Retardant Grades): Used for electronic spacers (e.g., PCB board insulation, power supply components). Meets UL94 V-0 flame-retardant standards—prevents fire spread in electrical applications.

3. Injection Molding Process: Optimized for Thin Spacer Quality

Our injection molding process is fine-tuned to solve common thin spacer issues (filling difficulty, warping, sink marks) with these advantages:

Precise Filling Control: Low-temperature (180–240°C, material-dependent) and high-pressure (80–120MPa) parameters ensure full filling of thin cavities. Servo-driven injection units maintain stable flow rate—avoiding "short shots" (unfilled edges) in ultra-thin spacers (≤0.5mm).

Flatness Guarantee: Post-molding cooling is controlled via temperature-regulated conveyors (25–40°C) to relieve internal stress. This keeps spacer flatness within ±0.1mm per 100mm length—critical for assembly alignment.

High Efficiency: Multi-cavity molds (16–32 cavities, based on spacer size) maximize output. For standard 20×20mm spacers (1mm thick), daily production reaches 50,000–80,000 components. Automated sorting systems reduce labor and ensure consistent quality.

Low Defect Rate: Real-time monitoring of pressure, temperature, and cooling time detects anomalies (e.g., uneven filling) instantly. Defect rate is kept below 0.3%—common issues like burrs or sink marks are minimized via mold polishing (Ra ≤0.8μm surface finish).

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

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

Plastic Spacer Manufacturing: Produce custom spacers in various sizes (5×5mm to 200×200mm), thicknesses (0.2–5mm), and designs (single-hole, multi-hole, notched). Supports custom colors (RAL/Pantone codes) or surface treatments (matte, glossy, anti-fingerprint).

Value-Added Assembly: Optional assembly services for spacer sub-assemblies—such as attaching adhesive tapes (for easy installation), combining spacers with metal washers, or assembling spacers into modular components (e.g., electronic device internal brackets). Delivers ready-to-use sub-assemblies, saving your production time.

Custom Design Support: Offer 3D mold design and rapid prototyping (via SLA 3D printing). We can produce 20–50 prototype spacers in 2–3 days for you to test flatness, hole alignment, and functional fit (e.g., insulation, load-bearing)—optimizing 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.