Plastic Injection Rattan Chair Mould

 

Mould name	Plastic Rattan chair mould
Product material	Plastic, PP
Product Size	630x630x530mm
Product Weight	2.55kg
Mould material for cavity &. Core	718
NOs of cavity	1 cavity
Injection system	Hot runner, big gate
Suitable injection machine	1000T
Mould size	1000x960x1235mm
Mould Weight	8000kg
Mould lifetime	more than 500,000pcs
Delivery Time	50 days

 

 

 

 

Designing a mould for a rattan-style plastic chair involves a detailed process to replicate the intricate woven texture while ensuring functionality and durability. Here's a structured approach:

1. Chair Design &. 3D Modeling

- CAD Modeling: Use CAD software to create a detailed 3D model of the chair, incorporating the rattan weave pattern. Apply texture mapping or surface modeling to simulate the woven effect.

- Draft Angles: Integrate slight draft angles (1-2°) to facilitate ejection without distorting the texture.

- Shrinkage Allowance: Scale the model to account for plastic shrinkage (e.g., 1.5-3% depending on material).

Mould Type & Structure

-Two-Plate Mould: Suitable for simple designs. For complex undercuts, consider side sliders or collapsible cores.

- Parting Line: Position to minimize visibility, often along edges or non-textured areas.

3. Core &. Cavity Design

-Texture Application: Use laser engraving or chemical etching on the cavity surface to replicate the rattan pattern. Ensure alignment between mould halves.

-Material Selection: Opt for hardened steel (e.g., P20 or H13) for high-volume production; aluminum for prototypes.

4. Gating System

- Gate Placement: Position gates to ensure even flow into thin sections (e.g., near thick areas or multiple gates for large chairs).

- Gate Type: Use submarine or edge gates to minimize visible marks.

5. Cooling &. Venting

- Cooling Channels: Design conformal channels near high-mass areas to ensure uniform cooling and reduce warping.

- Vents: Place along parting lines or ejector pins to prevent air traps, especially in textured regions.

6. Ejection System

- Ejector Pin: Position on non-visible surfaces (e.g., chair underside) to avoid marring the texture.

- Alternative Methods: Consider air ejection or stripper plates for complex geometries.

 

 

The most suitable steel for making rattan chair moulds depends on various factors. Here is an analysis for different scenarios:

High - volume production with high - quality requirements

S136 steel is an excellent choice. It has outstanding corrosion resistance and polishing performance, which can ensure the mould's surface quality and dimensional accuracy during long - term use. This is crucial for producing a large number of rattan chairs with high - gloss and high - precision surface requirements.

2.Medium - volume production with certain quality requirements

718 steel is suitable. It has good hardness uniformity and better corrosion resistance than ordinary steel. It can meet the requirements of medium - sized production volumes and can maintain the stability of the mould and the quality of the molded parts.

3.General - purpose production with lower cost considerations

P20 steel can be used. It has acceptable machinability and polishing properties, which can meet the basic requirements of rattan chair injection moulds. It is a more cost - effective option for small - to - medium - sized production volumes where the quality requirements are not extremely high.

In conclusion, there is no one - size - fits - all answer. The most suitable steel needs to be determined based on specific production requirements, quality standards, and cost constraints.

 

 

1. Cleaning the Mould

Daily Post-Use Cleaning:
After each production cycle, remove residual plastic and debris from the mould using a soft brush or compressed air. Avoid sharp tools to prevent scratches.

Tip: Use a non-abrasive cleaner (e.g., soapy water) for stubborn residue. Rinse with water and dry thoroughly.

Deep Cleaning:
Every 1–2 weeks, disassemble the mould (if possible) and clean all components with a degreaser. Pay attention to intricate areas like cavities and vents to prevent buildup.

2. Lubrication

Moving Parts:
Apply a food-grade lubricant (e.g., silicone spray) to hinges, slides, and pins to ensure smooth operation. Avoid over-lubrication to prevent contamination.

Hydraulic Systems:
If the mould has hydraulic components, check and replace hydraulic fluid as needed to maintain pressure and prevent leaks.

3. Rust and Corrosion Prevention

Rust Inhibitors:
Coat the mould's metal surfaces with a rust-preventive spray (e.g., CRC 336 or WD-40 Specialist Rust Remover) after cleaning. This protects against moisture and oxidation.

Dry Storage:
Store the mould in a dry, climate-controlled environment to minimize humidity exposure. Use desiccant packs in storage areas if necessary.

4. Cooling System Maintenance

Check Water Channels:
Regularly inspect cooling channels for blockages (e.g., mineral deposits or debris). Use a mild acidic cleaner (e.g., vinegar) to dissolve buildup.

5. Structural Inspections

Visual Checks:
Perform daily visual inspections for cracks, dents, or warping. Address minor damage immediately to prevent further issues.

Alignment and Fit:
Ensure all parts align correctly. Misalignment can cause uneven wear or product defects. Adjust or replace misaligned components as needed.

6. Preventive Maintenance Schedule

Frequency	Tasks
Daily	Clean residual plastic, inspect for damage, lubricate moving parts.
Weekly	Deep clean with degreaser, check cooling channels, test hydraulic systems.
Monthly	Flush cooling system, inspect alignment, replace worn parts.
Quarterly	Full disassembly, thorough cleaning, and rust-prevention treatment.

7. Handling and Storage

Gentle Handling:
Avoid dropping or mishandling the mould to prevent physical damage. Use lifting equipment if the mould is heavy.

Protective Covering:
When not in use, cover the mould with a breathable fabric or plastic sheet to protect it from dust and moisture.

8. Documentation

Keep a log of maintenance activities, including dates, tasks performed, and any issues encountered. This helps track patterns and ensures consistency.

9. Professional Servicing

Schedule annual inspections by a qualified 模具 technician (mould technician) to identify hidden issues and perform advanced repairs.

By following these steps, you'll prolong the lifespan of your plastic rattan chair mould and ensure consistent, high-quality production. If you need further clarification or have specific questions, feel free to ask!

 

 

Mould Steel

 

Hot Runner System

 

Standard Parts