Infrared welding machine

An infrared welding machine that joins a first cylindrical member made of resin and a second cylindrical member made of resin together by heating and melting at least one of an annular end surface of the first cylindrical member and an annular end surface of the second cylindrical member and then butting and pressing the annular end surfaces together,

• the infrared welding machine comprising a heating device that heats and melts the at least one annular end surface, called a surface-to-be-heated, with infrared rays,
• the heating device including:
• a lamp that is disposed so as to face the surface-to-be-heated from an axial direction without coming into contact with the surface-to-be-heated and has an annular shape with a circular cross-section such that the lamp radiates infrared rays in all radially outward directions;
• an outside diameter-side reflective member that has a cylindrical shape and reflects infrared rays radiated from the lamp toward an outside diameter side of the surface-to-be-heated so as to direct the infrared rays toward the surface-to-be-heated;
• and
• an inside diameter-side reflective member that has a cylindrical shape and reflects infrared rays radiated from the lamp toward an inside diameter side of the surface-to-be-heated so as to direct the infrared rays toward the surface-to-be-heated.

An infrared welding machine that joins a first cylindrical member made of resin and a second cylindrical member made of resin together by heating and melting each of an annular end surface of the first cylindrical member and an annular end surface of the second cylindrical member and then butting and pressing the annular end surfaces together,

• the infrared welding machine comprising a heating device that heats and melts each of the annular end surface of the first cylindrical member and the annular end surface of the second cylindrical member with infrared rays,
• the heating device including a first unit that heats and melts the annular end surface of the first cylindrical member and a second unit that heats and melts the annular end surface of the second cylindrical member,
• the first unit including:
• a first lamp that is disposed so as to face the annular end surface of the first cylindrical member without coming into contact with the annular end surface of the first cylindrical member and has an annular shape with a circular cross-section such that the first lamp radiates infrared rays in all radially outward directions;
• a first outside diameter-side reflective member that reflects infrared rays radiated from the first lamp toward an outside diameter side beyond the annular end surface of the first cylindrical member so as to direct the infrared rays toward the annular end surface of the first cylindrical member;
• and
• a first inside diameter-side reflective member that reflects infrared rays radiated from the first lamp toward an inside diameter side beyond the annular end surface of the first cylindrical member so as to direct the infrared rays toward the annular end surface of the first cylindrical member,
• the second unit including:
• a second lamp that is disposed so as to face the annular end surface of the second cylindrical member without coming into contact with the annular end surface of the second cylindrical member and has an annular shape with a circular cross-section such that the second lamp radiates infrared rays in all radially outward directions;
• a second outside diameter-side reflective member that reflects infrared rays radiated from the second lamp toward an outside diameter side beyond the annular end surface of the second cylindrical member so as to direct the infrared rays toward the annular end surface of the second cylindrical member;
• and
• a second inside diameter-side reflective member that reflects infrared rays radiated from the second lamp toward an inside diameter side beyond the annular end surface of the second cylindrical member so as to direct the infrared rays toward the annular end surface of the second cylindrical member.