What causes the deformation of plastic parts?

The reason is that slender parts, thin-walled parts with large areas, or large finished products with asymmetrical structures are caused by uneven cooling stress or different ejection forces during molding.

The solution? 1.Correction of plastic molds: correction of thimbles.

Set up the tensioning pin and so on; If necessary, the male mold is adjusted by biting the flower.

2.Injection molding correction: adjust the mold temperature of the male and female molds, reduce the pressure and other adjustments to the deformation of small parts, mainly rely on the size of the pressure and time, and the adjustment of the deformation of large parts generally depends on the mold temperature.

From the perspective of plastic pvc sports floor glue, your question: our sports engineering department of Hunan Modern Kewen Company once found that some places were blistered and deformed in less than a day after the paving was completed when the PVC badminton plastic floor was constructed. We immediately organized the heads of the technical department and the engineering department to come to the scene to solve the problem, and finally found out that the plastic floor was drenched in rain and deformed by moisture during transportation.

We immediately used an exhaust fan to dry it, and turned the plastic floor over to dry for a day or two before resurging it. Since then, there has been no deformation.

The uneven cooling and excessive pressure residue during the molding process of injection molded parts will produce internal stress, which is formed by injection molded parts under certain environmental conditions.

The holding time is not enough, the material temperature is too cold and too hot, and the pressure is too large and too small, which will cause product deformation.

This is due to the internal stress in the plastic part.

Due to the large compression and permanent deformation of the rubber, the rubber strip can be straightened by soaking it in boiling water for a few minutes.

Introduction to rubber. Early rubber was a material made of elasticity, insulation, impermeability to water and air after processing from latex from rubber trees, rubber grass and other plants. Highly elastic polymer compounds. It is divided into two types: natural rubber and synthetic rubber.

Natural rubber is made from rubber trees, rubber grass and other plants after extracting gum; Synthetic rubber is obtained by polymerization of various monomers. Rubber products are widely used in all aspects of industry or life.

Types of rubber are divided into natural rubber and synthetic rubber according to raw materials.

According to the form, it is divided into bulk raw rubber, latex, liquid rubber and powder rubber. Latex is a colloidal aqueous dispersion of rubber; Liquid rubber is an oligomer of rubber, which is generally a viscous liquid before vulcanization; Powder rubber is processed into powder form of latex to facilitate batching and processing. Thermoplastic rubber, developed in the 60s of the 20th century, is formed by the processing method of thermoplastics without chemical vulcanization.

Rubber is divided into two categories: general type and special type according to use. It is an insulator that does not easily conduct electricity, but it may become a conductor if it gets wet or has a different temperature. Conductivity is a condition that concerns the conduction of electrons of molecules or ions inside a substance.

The cup should not be burned, but you have not used it well, it must be that the lid of the cup is tightened after pouring hot water, and the cup will suddenly deform when the lid is opened again.

There's really no way to recover.

Answer: Hello, I am glad to answer for you, it is generally difficult for plastic to return to its original shape after it is deformed. You can try to blow the deformed area with a hair dryer first, and then correct it by hand after the plastic becomes soft, and then cool it with cold water, and then slowly use this method to correct it until it can be used. But it's hard to get back to being exactly the same as before.

Moreover, after the plastic is deformed by heat, some toxic components will be emitted, which is harmful to the body. Plastic is a material with resin as the main component, which can be molded into a certain shape at a certain temperature and pressure, and can maintain a given shape at room temperature. Plastics are generally divided into two categories: thermoplastics and thermoset plastics

Thermoplastics refer to plastics that can be softened or even melted and flowed within a certain temperature range, and can be cured into a certain shape after cooling, such as PE, PP, PVC, PS, PA, PC, etc., accounting for more than 95% of the total amount of plastics. Thermosetting plastic refers to the chemical change of resin in the heating process, from linear polymer to body polymer structure, after which it will no longer melt when heated, and will not be soluble in organic solvents, such as phenolic plastics, urea-formaldehyde plastics, epoxy resins, unsaturated polyesters, etc.

There are 2 main aspects that affect the deformation of the product:

1. Product design, which is the main reason.

a, the product itself is too straight, easy to deform, if allowed to set up reinforcement to pull.

b, turning fillet or deep cavity, etc., the stress is too concentrated to cause deformation after ejection.

2. Injection molding process.

The quality of the injection molding process also greatly affects the generation and degree of deformation.

Remedies after deformation:

1. There is no possibility of improvement in the product.

2. Adjustment of injection molding process.

3. After injection molding, you can use a fixture to clamp the product, put it in hot water or an oven, and remove the fixture after removing the stress.

Hello dear. Plastics can easily deform after deforming once, for the following reasons. The stress generated in the shaping process is slowly released with aging, and the deformation in a short period of time is affected by the variable temperature, and the molecular chain segment receives energy to produce creep, and the deformation in a long time has many factors such as aging, chain breakage, and energy.

There is a chemical change, aging. Some causes of deformation of plastic products Warpage deformation refers to the distortion and uneven shape of injection molded products, which deviates from the shape accuracy requirements of the workpiece, and it is one of the common product defects that are difficult to solve in injection mold design and injection production. Dear, remember to pay attention to the real-time weather forecast in advance when you go out, take care of the protection to improve safety awareness, and protect yourself and your family.