Precision Mold Manufacturing: Mold Design Details

author: Universe plastic

2024-03-21

The production of precision injection molds has very high design requirements and involves very complex mold structures and functional systems. Before processing and production, all design plans must be determined so as not to affect the quality of the final precision injection molding manufacturing.

How to control the design details of precision molds? The engineers of Universe Plastics will introduce the following points that you need to pay attention to:

Product design analysis

1. Detailed analysis of product size, shape and tolerance requirements.

2. Consider the properties of the materials used, such as shrinkage, flow and mechanical properties.

3. Understand the functional requirements of the product and ensure that the mold design meets these requirements.

Mold structure design

1. Choose the appropriate mold type, such as hot runner mold, multi-cavity mold, etc.

2. Determine the position and shape of the parting surface to ensure that the product is easy to demould.

3. Design the pouring system, including main channel, runner and gate, to ensure smooth flow of plastic melt.

4. Design an effective exhaust system to prevent blowholes and burns.

5. Design cooling water channels to ensure rapid and even cooling of the mold and improve production efficiency.

Precision design details

1. Compensate the mold size according to the shrinkage rate of the material.

2. Reasonably set fillets and chamfers in mold design to reduce stress concentration and product breakage risks.

3. Design stiffeners and ribs according to product needs to improve the rigidity and strength of the product.

4. Design appropriate demoulding mechanisms, such as ejector pins, push plates, inclined tops, etc., to ensure smooth demoulding of the product.

Mold material design selection

1. Choose appropriate mold steel, such as P20, H13, S136, etc., to ensure the wear resistance, corrosion resistance and service life of the mold.

2. Perform surface treatment such as chromium plating and nitriding on the mold to improve surface hardness and corrosion resistance.

Computer injection molding simulation

1. Use CAE software to conduct plastic flow analysis and optimize the design of the pouring system.

2. Conduct cooling analysis and optimize cooling water channel design to ensure rapid and even cooling of the mold.

3. Conduct structural stress analysis to ensure the strength and rigidity of the mold and prevent deformation and cracking.

Design document management

1. Completely record the design process and design drawings to facilitate subsequent maintenance and improvement.

2. Record each step and parameter of mold manufacturing and processing to ensure traceability.

Summarize

The above are the issues that need to be paid attention to when designing precision plastic molds. Designing precision molds is a very technical project, so you must find a professional mold manufacturing company.

Dongguan Universe Plastic Co., Ltd. has 15 years of experience in manufacturing injection molds and provides professional precision mold development, design and manufacturing services. We have a professional mold design team and advanced CNC and EDM manufacturing equipment.

If you have precision mold manufacturing needs and questions, please contact us to get the latest price.

Injection molding plastic material: TPU

Plastic manufacturing process: low pressure injection molding