Abstract: A dampening water spraying device includes: a nozzle for spraying dampening water; a nozzle holder including, an end surface connectable to the nozzle, and an outer peripheral portion provided with at least one groove; and a nozzle fixing member including, an opening portion adapted to expose at least a spout of the nozzle, and an inner peripheral portion provided with a nozzle attachment/detachment moving portion opposed to and engageable with the groove, the nozzle fixing member being adapted to be fastened to the nozzle holder while clamping the nozzle between the nozzle fixing member and the nozzle holder; wherein the nozzle fixing member includes an outer peripheral portion provided with a handhold portion for making it possible to to manually rotate the nozzle fixing member, thereby allowing to rapidly and readily conduct replacement of the nozzle.

Abstract: A dampening water spraying device includes:

Abstract: An apparatus and method for producing a tank or a heat exchanger. The apparatus includes molds which form the tank such that it has an open end, an annular skirt about the entire periphery of the open end, and an annular groove in the annular skirt. A space in the molds receives the skirt, and a projection on one of the molds urges the outer and inner side surfaces of the skirt toward each other after a resin has been injected into the annular groove. A guide surface extends from the bottom of the projection to a position substantially even with a bottom surface of the annular groove to govern the amount of deformation of the side surface which is urged by the projection. A bubble removal element, such as a protuberance or groove, is formed in the annular groove at a position where opposite ends of the resin impinge on each other when injected from an injection gate, to prevent bubbles from forming in the resin.

Abstract: An apparatus and method for producing a tank for a heat exchanger. The apparatus includes molds which form the tank such that it has an open end, an annular skirt about the entire periphery of the open end, and an annular groove in the annular skirt. A space in the molds receives the skirt, and a projection on one of the molds urges the outer and inner side surfaces of the skirt toward each other after a resin has been injected into the annular groove. A guide surface extends from the bottom of the projection to a position substantially even with a bottom surface of the annular groove to govern the amount of deformation of the side surface which is urged by the projection. A bubble removal element, such as a protuberance or groove, is formed in the annular groove at a position where opposite ends of the resin impinge on each other when injected from an injection gate, to prevent bubbles from forming in the resin.