JPH0591939A - Method for manufacturing plate-like hollow buddhist alter fittings - Google Patents

Abstract

PURPOSE:To prevent other portions from the influence of welding by supersonic welding of a welding pin to a downware projecting edge of an upper blank to determine the height of a cavity, while providing a fin making intimate contact with a upward projecting edge of a lower blank to press and weld the welding pin with a supersonic welder. CONSTITUTION:Two upper and lower thermoplastic resin blanks 2, 3 have respectively center holes 5, 9 with annular walls 10 mated with each other by joining. The lower blank 2 is formed on the peripheral edge with an upward projecting outside edge 6 so that a downward projecting edge 11 of the upper blank 3 overlaps horizontally with the inside of the upward projecting edge 6 of the lower blank 2. Welding pins 7 welded previously to the blanks 2, 3 by a supersonic welder to determine the height of a cavity 13 are provided projectingly on the outer peripheries of the center holes 5, 9, and fins 12 are provided on the downward projecting edge 11 of the upper blank 3 to determine the height of the cavity 13 ion the welding pins 7. Thus, in vibration welding by the supersonic 13 in the welding pins 7. Thus, in vibration welding by the supersonic welder, the overlapping portions of the annular walls 10 of the center holes, the upward projecting edge 6 and fins 12 are prevented from the welding action of the welder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a plate-shaped hollow Buddhist altar fitting, and in a method of welding upper and lower two materials by an ultrasonic welder, burrs are formed on the inner circumference of the center hole of each material, and inner and outer circumferences Another object of the present invention is to provide a manufacturing method which prevents the formation of a gap in the overlapping portion of the above and which saves unnecessary work for removing the burr and finishing.

[0002]

2. Description of the Related Art Molding of Buddhist altar fittings is generally performed by using a thermoplastic resin, and as shown in FIG. 7, ring walls e having joints are provided with central holes c and d having one or both of them and further lower portions. Two upper and lower thermoplastic resin materials formed by forming an upper protruding edge f on the outer side of the material a and a lower protruding edge g overlapping on the inner side of the upper protruding edge on the upper material b are welded by an ultrasonic welder. It is also practiced to manufacture plate-shaped hollow Buddhist altar fittings. The hollow is formed to reduce the weight while increasing the thickness of the plate-shaped Buddhist altar. Since the above-mentioned welding is performed by abutting the ring walls of the center hole of the plate-shaped hollow Buddhist altar fittings, or the center hole hole edge and the ring wall, welding burrs project inward from the center hole to make it unsightly, and to remove the unsightly Cumbersome deburring is required, and there is a gap between the upper protruding edge of the lower material and the lower protruding edge of the upper material.

[0003]

According to the method of the present invention, either one of the lower material and the upper material can be used without welding the ring walls of the center holes or the edges of the center hole and the ring wall as in the prior art. Protruding a welding pin around both center holes, preferentially applying a welding to determine the height of the hollow by the pin so that the welding does not easily affect other parts, and the above-mentioned It is an object of the present invention to solve a problem that eliminates a defect having a horizontal gap between a protruding edge and a lower protruding edge.

[0004]

In the method for manufacturing a plate-shaped hollow Buddhist altar fitting according to the present invention, two upper and lower thermoplastic resin materials 2 having central holes 5 and 9 in which one or both ring walls 10 are joined by joining are provided. 3, an upper protruding edge 6 that is an outer side is formed on the periphery of the lower material 2, and a lower protruding edge 11 that is horizontally overlapped with the upper protruding edge 6 of the lower material 2 is formed on the upper material 3. In the structure, several welding pins 7 which are preferentially welded to one or both of the materials 2 and 3 by an ultrasonic welder to determine the height of the hollow 13 are projected to the outer periphery of the center holes 5 and 9. Provided on the lower protruding edge 11 of the upper material 3 is ultrasonic vibration welding for determining the height of the hollow 13 of the welding pin 7, and also provided with a fin 12 for press-contacting on the upper protruding edge 6 of the lower material 2. The ultrasonic wave by pressing Subjected to vibration welding by Ruda, it is characterized in that as the overlapping portion of the ring wall 10 of the central hole, and the welding action of the welder upwardly protruding edge 6 and fins 12 do not span.

[0005]

According to the method of the present invention, the lower material 2 and the upper material 3 are conventionally welded by the ultrasonic welder, but the welding pin 7 which determines the height of the hollow by welding the outer periphery of the center hole 5 or 5, 9 Is provided in an annular shape, and a jig or the like is applied so that the pins are preferentially ultrasonically vibrated and welded, and subjected to the action of a welder, the ring walls 10 of the center holes 5 and 9 or one center hole. The vibration action of the ultrasonic welder does not act on 5 or 9 and the ring wall 10. The ultrasonic vibration is stopped at the moment when it is determined that the welding pin 7 has welded the lower material 2 or the upper material 3 or the welding pins 7 of the counterpart. At that time, the ring walls 10 or one of the center holes 5 or 9
Since the ring wall 10 and the ring wall 10 are joined to each other somewhat strongly, they are not welded, so no burr due to welding appears outside, no troublesome polishing finish is applied, no traces are left by polishing, and the fin 12 protrudes upward. Since it adheres to the rim 6 in a non-welded state, it does not collect dust during long-term use by covering the space between the upper ridge 6 and the lower ridge 11 which is inevitably overlapped in the horizontal direction. The fin 12 can be easily wiped clean even if dust on the fin 12.

[0006]

1 to 6 of the accompanying drawings illustrate the method of the present invention, and FIG. 1 is a front view showing a wheel stand using a plate-shaped hollow Buddhist altar fitting 1 welded by the method of the present invention. Figure, Figure 2
Is a plan view of the lower material 2, FIG. 3 is a plan view showing the upper material 3 upside down, FIG. 4 is a side view of a vertical cross section of the lower material 2 and the upper material 3 facing each other, and FIG. FIG. 6 is a vertical sectional side view of the central portion in the joined state, and FIG. 6 is a vertical sectional side view of the central portion after the welding.

The plate-shaped hollow Buddhist altar fitting 1 has a lower material 2 and an upper material 3.
And a frame-shaped pedestal 4 is joined to the lower surface of the Buddhist fitting 1 to form a wheel stand. The lower material 2 is a hexagonal plate having a center hole 5, is formed of a thermoplastic resin and has an upper projecting edge 6 on its periphery, and several welding pins lower than the upper projecting edge are provided on the outer periphery of the center hole 5. 7 is provided in an annular shape, and a protrusion 8 is provided at the center of the upper surface of the welding pin. The welding pin 7 is formed on the lower material 2 and the upper material 3 with a height that determines the height of the hollow 13,
Alternatively, it may be provided on the upper material 3.

The upper material 3 is formed of the same resin material as the lower material 2 and descends from the lower surface of the center hole 9 to form the lower material 2.
A ring wall 10 having a triangular cross-section that contacts the outer peripheral edge of the center hole 5 is provided on the lower surface, and a lower projecting edge 11 that partially overlaps the inner surface of the upper projecting edge 6 in the horizontal direction is formed on the outer periphery. In addition, as shown in FIG. 6, when the welding pin 7 is welded to the lower surface of the upper material 2, there is provided a fin 12 which comes into close contact (not welding) with the upper protruding edge.

[0009]

The method for manufacturing a plate-shaped hollow Buddhist altar fitting according to the present invention is as described in detail in the section of the operation, and is a welding pin which is preferentially welded by an ultrasonic welder to determine the height of the hollow 13. 7 and the lower protruding edge 1 so as to be in close contact with the upper protruding edge 6 with the height of the hollow 13 determined by the welding pin.
It is manufactured by the materials 2 and 3 in which the fin 12 is provided on the 1 and by providing this method, it is possible to give a unique effect which cannot be produced by the conventional plate-shaped hollow Buddhist altar fittings.

[Brief description of drawings]

1 to 6 of the accompanying drawings are explanatory views of the method of the present invention, and FIG. 7 is a longitudinal sectional view of a conventional lower material and upper material after welding.

FIG. 1 is a front view showing a wheel stand using a plate-shaped hollow Buddhist altar fitting 1 welded by the method of the present invention.

FIG. 2 is a plan view of the lower material 2.

FIG. 3 is a plan view of the upper material 3 viewed upside down.

FIG. 4 is a vertical sectional side view of a central portion in which a lower material 2 and an upper material 3 are vertically opposed to each other,

FIG. 5 is a vertical sectional side view of the central portion in the same joined state.

FIG. 6 is a vertical sectional side view of the central portion after the welding.

FIG. 7 is a vertical cross-sectional view of a conventional lower material and upper material after welding.

[Explanation of symbols]

1 hollow plate, 2 lower material, 3 upper material,
4 wheel stand, 5 center hole, 6 upward projecting edge, 7 welding pin, 8 protrusion, 9 center hole, 10 ring wall, 1
1 downward protruding edge, 12 fins, 13 hollow,

Claims (1)

[Claims] 1. An upper and lower thermoplastic resin material having a central hole in one or both of which an annular wall matched by joining is formed, and an upper protruding edge which is an outer side is formed at a peripheral edge of the lower material, and the upper portion is formed. In a structure in which a lower protruding edge that overlaps in the horizontal direction is formed inside the upper protruding edge of a lower material in the material, one or both materials are weld pins that determine the height of the hollow by welding with an ultrasonic welder. Is provided so as to project to the outer periphery of the center hole, and a fin that joins to the upper protruding edge of the lower material together with ultrasonic welding that determines the hollow height of the welding pin is provided on the lower protruding edge of the upper material,
The welding pin is pressed by a jig or the like to perform welding by an ultrasonic welder so that the welding action of the welder does not reach the overlapping portion of the ring wall of the central hole, the upper protruding edge and the fin. A method for producing a plate-shaped hollow Buddhist altar fitting.