Inflation needle, its mold and method of manufacturing same

An inflation needle mold (100) comprising:

• a male half (101);
• a female half (102);
• at least one cores (103);
• at least one draw plates (1031);
• at least one seats (1021);
• and
• at least one internally threaded members (104);
• characterized in that
• the cores (103), the draw plates (1031), the seats (1021), and the internally threaded members (104) are sandwiched by the male half (101) and the female half (102);
• at least one exhaust gaps (105) each is provided between the internally threaded member (104) and the core (103);
• and
• at least one sprue (108) is provided in front of a smaller diameter portion of the cores (103) for introducing molten plastic material into the mold (100).

A method of manufacturing an inflation needle comprising the steps of:

• (A) joining a male half (101) and a female half (102) together to form a mold (100);
• (B) initially heating the mold (100) to a temperature between 50 and 80 degrees Celsius;
• (C) heating plastic granules to a temperature between 150 and 200 degrees Celsius until the plastic granules are molten;
• (D) introducing the molten material into the mold (100) through a sprue (108);
• (E) expelling hot air from the mold (100) through two exhaust gaps (105) each between an internally threaded member (104) and a core (103) until the mold (100) is about half vacuum, thereby facilitating flow of the molten material to completely fill the molten material in the mold (100), resulting in a half-finished inflation needle having uniform thickness;
• (F) cooling the mold (100) to shape the half-finished inflation needle;
• (G) removing the half-finished inflation needle from of the mold (100);
• and
• (H) cooling in water for the half-finished inflation needle at a temperature between 5 and 15 degrees Celsius for 5 to 15 minutes to produce a finished inflation needle (100) having a smooth outer surface and uniform thickness.