Small Batch Medical Plastic Injection Molding Services

Medical plastic injection molding is a kind of mold specially used for producing plastic shells, which are commonly used in diagnostic equipment and so on. It is mainly composed of two parts: the moving mold and the fixed mold. Under the action of the injection molding machine, the molten plastic is injected into the cavity of the mold, and after cooling and curing, the mold is opened, and the final molded product is taken out.

Medical Injection Molding Services Process

1. Design

The first step of medical injection molding processing is design. According to the structure, function, and safety requirements of medical products, designers use CAD and other professional software for mold design. The design includes the mold structure, cavity layout, cooling system, and so on.

2. Material Selection

The material selection of medical injection mold is crucial because it directly affects the service life of the mold and product quality. Commonly used materials include stainless steel and alloy. Material selection needs to consider the production needs of small atch injection molding, the precision requirements of the equipment shell, and the chemical properties of the plastic to ensure that the mold can work stably for a long time.

3. Mold Base Preparation

According to the design drawings, select suitable materials and prepare the mold base through cutting, machining, and other processes to lay the foundation for subsequent machining.

4. Machining

Mechanical processing is the core link of medical injection mold processing, including the following steps:

a. Milling: Roughing and semi-finishing of the mold base using a CNC milling machine to form the basic shape.

b. Drilling: Machining cooling water channels, pilot holes, and other structures.

c. Grinding: Use a grinding machine to finish the surface to improve the dimensional accuracy and surface finish of the mold.

d. EDM: Used to process complex shapes and micro structures to ensure accuracy, especially suitable for the manufacture of precision medical plastic injection molding.

5. Surface treatment

For medical injection molds, surface treatment is particularly important. Commonly used chrome plating methods are used to improve the corrosion resistance and finish of the mold, ensuring that the shell is clean and accurate.

6. Assembly

The finished mold parts are assembled to ensure the best fit between each part.

7. Mold Testing

The assembled mold will be installed in the injection molding machine for mold trial. Through the mold trial, the operation of the mold and product molding effect are detected, and necessary mold repairs are made according to the actual situation.

8. Production

After the trial mold is confirmed to be correct, the mold is formally put into mass production to provide a high-quality production guarantee for medical plastic products.

Medical Injection Mold Processing Characteristics

1. High precision

Medical injection molding processing requires high-precision CNC machine tools and EDM equipment to ensure that the dimensional accuracy and surface finish meet the requirements of the medical industry for the use of products.

2. High complexity

Medical plastic part molds usually have a complex structure, and in the process of processing, it is necessary to consider a variety of factors, such as demolding slope, shrinkage, cooling system, and so on.

3. High material requirements

Medical injection molds need to work in a high-temperature and high-pressure environment, and the choice of materials needs to meet the requirements of high-temperature resistance and wear resistance to ensure long-term stable production.

4. High technical content

Medical injection mold processing involves a variety of advanced technology and equipment, and the technical level of the factory personnel has high requirements.

Injection molding is an important link in the production of medical plastic products, affecting product quality, production efficiency, and production costs. In the face of the market demand for small batch injection molds, manufacturers need to continuously improve the level of technology to meet the growing demand for precision and personalized production in the medical industry.