JPH02108510U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1: A front view of the entire mold for forming the elbow forming member 12, Fig. 2: A front view of the entire mold during the same formation, Fig. 3: An explanatory diagram of the order of forming the elbow forming member 12, Fig. 4 Figure: A perspective view of a square tube elbow 13 made from the elbow forming member 12 of the present invention, Figure 5: An explanatory diagram of the formation order of the elbow forming member of another embodiment of the present invention, Figure 6: Another embodiment FIG. 7 is a perspective view of a conventional square tube elbow 11. FIG. 1: Lower outer mold, 2: Upper outer mold, 3: Upper inner mold, 4: Lower inner mold, 5: Base, 6: Hydraulic or air cylinder pipe, 7: Hydraulic or air cylinder, 11
: Conventional square pipe elbow (Fig. 8), 12: Square pipe elbow forming member, 12a: Tip, 13: Square pipe elbow, 14: Joint line (Fig. 8), 112: Square pipe elbow forming member (Fig. 8). 6, 7), 112a: first bent part, 112b: second bent part, 113: square tube elbow,
p: Raw material.

Claims (1)

[Claims for Utility Model Registration] A member for forming a desired rectangular tube elbow by vertically opposing each other, which is characterized in that its cross section is a shape with one of the four sides of a quadrilateral open. A member that forms a pipe elbow. 2. The square tube elbow forming member according to claim 1, which has a U-shaped cross section. 2. The square tube elbow forming member according to claim 1, wherein the bent portions on both sides having a U-shaped cross section are further bent inward to face each other.