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Thermosets and Thermoplastics

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Thermosets and Thermoplastics
Thermosets and Thermoplastics

① After being heated, the molecular structure of thermosetting plastics is converted into a network or body shape and solidified. After hardening, it cannot be softened again even if heated.

The characteristics of this material are hard texture, good heat resistance, relatively stable size, and insoluble in solvents. Common ones include phenolic resin (PF), epoxy resin (EP), unsaturated polyester (UP), etc.

② Thermoplastic plastic softens and melts under heated conditions, and is shaped after cooling. And it can be repeated many times and always has plasticity. What happens during processing is physical change.

Common ones include polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polystyrene (PS) and their modified varieties, ABS, nylon (PA), polyoxymethylene (POM), polycarbonate (PC), organic glass (PMMA), etc.

The molding process of this type of plastic is relatively simple under a certain plasticizing temperature and appropriate pressure, and its plastic products have different physical and mechanical properties.

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Five major links of plastic mold

Mold manufacturing process

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Five major links of plastic mold

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Mold manufacturing process

Basic knowledge of injection mold structure

Basic knowledge of injection mold structure

30

2023-08

Basic knowledge of injection mold structure

Basic knowledge of injection mold structure includes the following points

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2023-08

Five major links of plastic mold

Effective management of product data management, process data management, and drawing document management: Effective mold product data management, process data management, and drawing document management can ensure the comprehensiveness of the files and the consistency of the drawing versions; so that the drawings can achieve Efficient sharing and efficient query utilization.

30

2023-08

Thermosets and Thermoplastics

After being heated, the molecular structure of thermosetting plastics is converted into a network or body shape and solidified. After hardening, it cannot be softened again even if heated.

30

2023-08

Mold manufacturing process

The mold manufacturing process flow is as follows:

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2023-08

Current status and trends of technological development in the plastic mold industry

In recent years, with the continuous development of the modern new material industry, people's awareness of energy conservation and environmental protection has increased, and the injection mold processing industry has also undergone changes. On this basis, various new injection molding technologies have been developed, mainly including large-scale injection molding, precision injection molding and thin-wall injection molding.

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2023-08

Precautions for mold manufacturing

When some users develop products or trial-produce new products, they often only focus on product research and development in the early stage and ignore communication with plastic mold manufacturing units. After the product design plan is initially determined, there are two benefits of contacting the mold manufacturer in advance.

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2023-08

Understand the hot runner system in one article

Hot runner system, also known as hot runner system, mainly consists of hot runner sleeve, hot runner plate, and temperature control electrical box. Our common hot runner systems have two forms: single-point hot gate and multi-point hot gate. Single-point hot gate uses a single hot sprue sleeve to directly inject molten plastic into the mold cavity. It is suitable for plastic molds with a single cavity and a single gate; multi-point hot gate branches the molten material to various locations through a hot runner plate. The heat is divided into the sprue sleeve and then enters the mold cavity. It is suitable for single-cavity multi-point feeding or multi-cavity molds.

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2023-08

Development of plastic molds

The various tools and products we use in daily production and life, ranging from the base of machine tools and body shells to as small as a cup head screw, button and the shell of various household appliances, are all closely related to molds. The shape of the mold determines the appearance of these products, and the processing quality and precision of the mold also determines the quality of these products. Because the materials, appearances, specifications and uses of various products are different, molds are divided into non-plastic molds such as casting molds, forging molds, die-casting molds, and stamping molds, as well as plastic molds.