Plastic for injection molding of mutual inductor shells

Abstract

The invention discloses a plastic for injection molding of mutual inductor shells, relating to the technical field of mutual inductor manufacturing. The plastic comprises the following raw materials in parts by weight: 60-75 parts of polypropylene, 1-3 parts of paraffin, 5-10 parts of anti-ageing agents, 3-8 parts of accelerants, 6-9 parts of adhesives and 10-15 parts of toughening agents. By taking the polypropylene as the main raw material, the plastic is light in weight, good in mechanical property, impact-resistant and good in molding property, has relatively high heat resistance, does not absorb water, does not react with most of chemicals, does not have toxicity and has good electric insulation property; by adding the anti-ageing agents, the plastic is durable and ageing-resistant; by adding the adhesives, the adhesiveness is high, so that the plastic is easy to be adhered to the surfaces of mutual inductors; and by adding the accelerants, the plastic is easier to mold.

Description

technical field [0001] The invention relates to the technical field of transformer manufacturing, in particular to a plastic used for injection molding of a transformer shell. Background technique [0002] Transformer, also known as instrument transformer, is a general term for current transformer and voltage transformer. It can change high voltage into low voltage and large current into small current. It is used for measurement or protection system. Its function is mainly to convert high The voltage or high current is converted into standard low voltage or standard small current in proportion to realize the standardization and miniaturization of measuring instruments, protection equipment and automatic control equipment. For safety, a very small transformer is practical on the circuit board of the air conditioner, and the mutual inductance current is extremely small, so the technical requirements for the production of this small transformer are very high, the variable contr...

AI Technical Summary

Problems solved by technology

[0002] Transformer, also known as instrument transformer, is a general term for current transformer and voltage transformer. It can change high voltage into low voltage and large current into small current. It is used for measurement or protection system. Its function is mainly to convert high The voltage or high current is converted into standard low voltage or standard small current in proportion to realize the standardization and miniaturization of measuring instruments, protection equipment and automatic control equipment. For safety, a very small transformer is practical on the circuit board of the air conditioner. Any changes in the transformer may lead to the use effect of the transformer, so it is necessary to put such a small transformer in a closed environment to improve its working stability. This kind of transformer is small in size and cannot be made of glass fiber board Packaging shell, the current method is to wrap a layer of plastic on the outside of the transformer. The current technical means is to put the finished transformer into the mold of the injection molding machine and inject it into the polypropylene package. The polypropylene is resistant to voltage and arc resistance. Good, but it has poor cold resistance, low low-temperature impact strength, and is susceptible to aging due to the effects of light, heat and oxygen during use.