| 摘要 |
PURPOSE: To alleviate the distortion generated at a boundary between the highly crystallized part and the amorphous part of a tube end and to improve the impact strength of the connected part by melting and connecting the vicinity of the connecting part of the tube material by holding the vicinity at the melting point or lower of the material to connect the material. CONSTITUTION: The tube end faces of the tube materials P1 , P2 of a molded form of a polyphenylene sulfide(PPS) to be connected are formed perpendicular to the axial direction of the tube material, the materials P2 , P2 are disposed at clamps 1, 2 and fixedly positioned. In this case, the materials P1 , P2 are so positioned that the distances from the tube end faces to the ends of liners 11, 12 of the clamps are 1 to 2mm. The grips of the materials P1 , P2 are heated by liners 11, 12 for a predetermined time. The temperatures of the grips are held at the temperature lower than 270 deg.C of the melting point of PPS, e.g. 200 deg.C, heated and melted. Thus, it is held at the lower temperature by 70 deg.C than the melting point of the PPS, thereby raising the impact strength twice as large as the strength. |
