Plastic Recycling Container Mould

 

Mould name	Plastic Recycling Container Mould
Container material	HDPE, plastic
Container Size	450X330X455mm
Container volume	40L
Mould material for cavity &. Core	P20, 718, 2738
Mould base	P20
Injection system	Cold/Hot runner
Suitable injection machine	600T
Mould size	700X580X690mm
Mould lifetime	more than 500,000pcs

 

 

 

>Key Advantages of PP (Polypropylene)

1. Chemical Resistance

Resists acids, alkalis, and most solvents, making it ideal for harsh waste (cleaning chemicals, industrial scraps).

Heat Resistance

Withstands temperatures up to 100–120°C (better than HDPE), suitable for hot climates or sterilizable bins.

Lightweight & Flexible

Less brittle than HDPE, reducing cracks from impacts (good for stackable containers).

Food-Safe & FDA-Compliant

Often used for kitchen compost bins or medical waste containers.

>Cons of PP

Lower UV resistance (requires additives for outdoor use).

Less rigid than HDPE (may deform under heavy loads).

>Key Advantages of HDPE (High-Density Polyethylene)

Superior Strength & Rigidity

Higher density makes it ideal for heavy-duty bins (construction waste, wheeled trash cans).

UV &. Weather Resistance

Naturally resists sunlight and rain (common for outdoor recycling bins without additives).

Impact-Resistant

Stays durable in cold temperatures (won't crack like PP in freezing conditions).

100% Recyclable

The #1 recycled plastic (e.g., milk jugs, detergent bottles), aligning with circular economy goals.

>Cons of HDPE

Less heat-resistant (softens above 80°C).

Harder to color uniformly (often seen in natural/opaque tones).

 

 

1. Design & Engineering

3D Modeling: CAD software (e.g., SolidWorks, UG/NX) creates the mould design based on container specifications.

DFM Analysis: Design for Manufacturability checks for draft angles, wall thickness, and ejection feasibility.

Moldflow Simulation: Software predicts plastic flow, cooling, and potential defects (sink marks, warpage).

Output: Finalized 3D drawings and technical specifications.

2. Material Selection

Choose mould steel based on:

Production Volume:

Low volume (<100K shots): P20/718 steel (cost-effective).

High volume (1M+ shots): H13/S136 (hardened for wear resistance).

Plastic Type: Abrasive materials (e.g., recycled PP/HDPE) require hardened steel.

3. CNC Machining

Mold Base Preparation: Standardized plates (A/B plates, ejector system) are machined.

Core & Cavity Cutting: CNC mills/lathes carve the mould's negative shape from steel blocks.

EDM (Electrical Discharge Machining): For intricate details (textures, logos).

Grinding/Polishing: Ensures smooth surfaces (SPI A1-A3 finishes).

4. Mould Trial (T0/T1 Samples)

First Shot (T0): Tests basic functionality.

T1 Samples: Adjustments made (e.g., gate size, cooling) for optimal quality.

Inspection: Measures dimensions, checks for flash, sink marks, or warping.

 

 

 

 

 

 

Mould Steel

 

Hot Runner System

 

Standard Parts

 

To get an accurate quote for a plastic recycling container mould, please provide the mould supplier with detailed specifications. Below is a checklist of essential information required for a precise quotation:

1. Product Design & Technical Details

3D CAD File (STEP, IGES, or PRT format preferred)

2D Drawings (PDF/DWG with dimensions, tolerances, and critical features)

Wall Thickness (affects cooling time and moulding cycle)

Part Weight (helps determine shot size and machine requirements)

Material Type (e.g., HDPE, PP, ABS, recycled plastic – some materials are more abrasive and require harder steel)

2. Mould Specifications

A. Mould Structure

Number of Cavities (single cavity, multi-cavity, or family mould)

Mould Base Material (standard: P20, 718; high-end: H13, S136)

Core & Cavity Steel (hardened steel for long runs, pre-hardened for cost savings)

Lifespan Expectation (e.g., 100K, 500K, or 1M+ shots)

B. Moulding System

Runner Type (cold runner vs. hot runner – hot runner is more expensive but reduces waste)

Ejection Mechanism (ejector pins, air ejection, stripper plate)

Cooling System (standard drilled channels vs. conformal cooling for faster cycles)

C. Surface Finish & Texture

Polish Level (SPI A1 mirror finish, textured finish, grit-blasted, etc.)

Custom Engravings/Logos (if needed).