In-mold piping filter

An in-mold piping filter comprising a joint, wherein:

• the joint is made by melting plastic particles into a liquid plastic material at high temperature, and then injecting the liquid plastic material into a mold cavity defined inside a mold, so that the joint is integrally formed in the mold and obtained by removal from the mold;
• wherein the joint has a tubular body and an opening at each end of the tubular body configured to allow fluid to pass therethrough;
• the joint has a filter member inside the tubular body comprising a dividing plate comprising a plurality of filtering holes and a peripheral edge of the partition plate integrally connected with the inner wall of the tubular body;
• the mold further comprises a first slide insert and a second slide insert for forming the pipe filter in the tubular body;
• wherein the mold has two dies each having a mold cavity at corresponding inner sides, and when the two dies are brought together, the first slide insert and the second slide insert are respectively placed from the two ends of the mold cavities, and the mold further has at least one injection port for accepting the liquid plastic material;
• and
• the first slide insert and the second slide insert are both smaller than the mold cavity such that when the first slide insert and the second slide insert are placed in the mold cavity, a circular space is formed between an inner wall of the mold cavity, the first slide insert and the second slide insert for forming the tubular body;
• an end of the first slide insert having a plurality of columns is inserted into the mold cavity and abutting against an end of the second slide insert in the mold cavity.