Stamping and filling type dumbbell and manufacturing method

Abstract

The invention relates to a stamping and filling type dumbbell and a manufacturing method thereof, wherein the stamping and filling type dumbbell can be manufactured without casting. The stamping and filling type dumbbell comprises a dumbbell. Two dumbbell balls and a handle connecting two dumbbell balls are constituted of two halves of two metal stamping dumbbell ball shells and the mixed slurry is filled into the dumbbell cavity formed thereby. The dumbbell and the manufacturing method have the advantages that: firstly, the dumbbell made by stamping, welding and filling is high in strength as well as good in toughness, thus greatly reducing the production cost; secondly, the texture distribution in the dumbbell body is even and stable and cannot move along with the movement of the dumbbell, thus satisfying the requirements of training; and thirdly, defects that a large amount of coal is consumed in the production of casting dumbbells and environment is polluted are resolved basically, thus realizing pollution-free production.

Description

Technical field [0001] The invention relates to a stamping-filled dumbbell capable of completing dumbbell manufacturing without casting and a manufacturing method thereof, belonging to the field of dumbbell manufacturing. Background technique [0002] 1. CN2526038Y, the name "filled dumbbell", which includes two accommodating bodies made of soft materials, and a handle, wherein the center of the accommodating body is provided with a shaft hole in the axial direction, and the two ends of the handle It is positioned through the shaft holes of the two accommodating bodies, and a tapered filling hole is provided at a predetermined position on the peripheral surface of the accommodating body. The tip of the filling hole penetrates the hollow part of the accommodating body, and the tip of the filling hole is The pores are almost completely closed. When the weight sand A is introduced through the filling hole, it can be prevented from leaking. Each container of the present invention is ...

AI Technical Summary

Problems solved by technology

Its shortcoming: one, because the head of the dumbbell is made of flexible material, it can neither form an integral structure with the filling in it, nor can it ensure the stability of the weight distribution per unit volume in the dumbbell head. The filler still exists in the process of training and moves, which directly affects the effect of training; the second is that the structure is complex and the manufacturing cost is high; Breakable

Its shortcomings: First, because the dumbbell shaft and the dumbbell piece are integrally connected and communicated plastic hollow bodies, no matter whether it is filled with sand or filled with water, it cannot form an integral structure with it. The filler inside is easy to move, which directly affects the effect of training; second, because the shaft of the dumbbell and the dumbbell weight are made of plastic, their strength is poor, and they are easy to break during training.

Its shortcomings: one is that the filling material filled in the head of the flexible dumbbell cannot form an integral structure with it, and the filling in the dumbbell head is easy to move during the training process, which directly affects the training effect; the other is that the two dumbbells The handle bar between the heads is a plug-in structure, which does not conform to the standard design of dumbbells, and it is easy to cause the separation of the two dumbbell heads

[0005] 4. The dumbbells produced by the above-mentioned background technology have not been produced and exported because they cannot reach the technical indicators stipulated by international standards; at present, almost all dumbbells in the world come from China, and they are all cast. Domestic sales of hundreds of millions of tons not only causes a waste of coal resources, but more importantly, causes serious pollution to the environment

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