Advantages and Disadvantages for Compression molding Process

Compression molding Process- Advantages and Disadvantages
Compression molding is a well known technique to develop variety of composite products. It is a closed molding process with high pressure application. Heat and pressure is applied as per the requirement of composite for a definite period of time. The material placed in between the molding plates flows due to application of pressure and heat and acquires the shape of the mold cavity with high dimensional accuracy which depends upon mold design. Curing of the composite may carried out either at room temperature or at some elevated temperature. After curing, mold is opened and composite product is removed for further processing.

In principle, a compression molding machine is a kind of press which is oriented vertically with two molding halves (top and bottom halves). Generally, hydraulic mechanism is used for pressure application in compression molding.

What is a compression?
DEYING is a high-quality mold manufacturer, and provides solutions for various molds, such as thermoplastic molds, thermoset molds, glass reinforcement molds, carbon fiber molds, etc.

So what is a compression? Compression mold is a type of mold that forms a solidified material by compression. You can also call it a stamping die, or even use it as a tablet die.

Compression molds can be used for thermosetting plastics, thermoplastics and rubber materials. In other words, the mold material is plasticized and flows to fill the cavity, and then the resin is cured. Therefore, the pressure in the compression molding process is higher than other processes, which belongs to high-pressure forming. Die is also widely used in agriculture, transportation, electric power, chemical industry, construction, machinery and other fields. Based on our many years of experience, DEYING has better control of the molding temperature, material spreading method and the key method of producing high-quality compression molds.

We are responsible for the final molded products and are committed to creating high-precision products that meet customer requirements. The use of reinforced and hardened mold steel and precise processing technology can effectively prevent the product from sticking to the mold and ensure the product's performance and high-quality surface. DEYING's processing method can effectively improve production efficiency and extend mold life. Our team can effectively anticipate possible problems during the design stage and deal with them effectively, and we will do our best to deal with after-sales.

Application:

1. Method is equally applicable for both thermosetting and thermoplastic polymer based composites.

2. A very wide application spectrum ranging from kitchen goods to automobiles, toys, electrical items and aeroplane parts.

3. Typical products include automobile panels, roof, life gates, battery trays, fenders, hoods, bumpers, spoilers, air deflectors furniture kitchen bowls and trays, dinnerware, buttons, large containers, recreational vehicle body panels, medical equipments (ultrasound equipments).

Advantages of the Compression Molding Process

1. Production rate is high as the mold cycle time is in few minutes.

2. Good surface finish with different texture and styling can be achieved.

3. High part uniformity is achieved with compression molding process.

4. Good flexibility in part design is possible.

5. Extra features like inserts, bosses and attachment can be molded in during the processing.

6. Raw material wastage is minimum.

7. Maintenance cost is low.

8. Residual stresses are absent or negligible in the molded component.

9. Twisting and shrinkage in product is reduced therefore dimensional accuracy is good.

Disadvantages of compression molding process

1. Due to expensive machinery and parts, the initial capital investment associated with compression molding is high.

2. The process is suitable for high production volume. It is not economical for making a small number of parts or for prototyping applications.

3. It is a labour intensive process.

4. Sometimes secondary processing (trimming, machining) of product is required after compression molding.

5. Sometimes uneven parting lines are there.

6. There is limitation on mold depth.

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Post time: Jul-23-2021