Circulation pipe structure and manufacturing method thereof
AssigneesHyundai Motor Company, Kia Corporation
InventorsMin Gyun Chung, Hyeong Won Park
Life of this patent
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Abstract
A circulation pipe structure and a manufacturing method thereof are provided. The circulation pipe structure includes an upper member, a lower member coupled to the upper member to form the circulation pipe structure, and first coupling parts respectively provided on the upper member and the lower member. The first coupling parts are engaged with each other when the upper member and the lower member are coupled. The circulation pie structure also includes a second coupling part that couples the upper member and the lower member to each other by a coupling member.
Claims19
A circulation pipe structure comprising:
- an upper member;
- a lower member coupled to the upper member to form the circulation pipe structure;
- first coupling parts respectively provided on the upper member and the lower member and engaged with each other when the upper member and the lower member are coupled;
- and
- a second coupling part that couples the upper member and the lower member to each other by a coupling member.
A manufacturing method of a circulation pipe structure, the manufacturing method comprising:
- primarily injecting a first polymer material simultaneously into a first mold having a shape of an upper member and a second mold having a shape of a lower member;
- engaging the upper member and the lower member with each other while forming gaps therebetween by moving one of the first mold and the second mold;
- and
- secondarily injecting a second polymer material into the gaps,
- wherein
- in primarily injecting the first polymer material, the first mold and the second mold are spaced apart from each other;
- and
- in secondarily injecting the second polymer material, a temperature of the upper member and the lower member is 140° C. or higher, and an injection temperature of the second polymer material is 300° C. or higher.
Dependencies are inferred from the claim text.