CN110732115A

CN110732115A - method for making dumbbell barbell disc

Info

Publication number: CN110732115A
Application number: CN201911008020.2A
Authority: CN
Inventors: 李浩炜
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-01-31

Abstract

The invention discloses a manufacturing method of dumbbell barbell discs, which comprises the steps of preparing a preformed filler, preparing a shell and performing injection molding to obtain a finished product of the dumbbell barbell disc, wherein the preformed filler is prepared by adding an adhesive material into a fixed-shape mold, pouring the filler after molding, and pouring the filler in a shape of a ring disc with a through hole in the middle, the shell is prepared by pouring a plastic raw material into a shell molding mold and performing injection molding to form a shell shape and putting the preformed filler into the molded shell, and the injection molding is performed by performing hot injection molding to fix and seal the joint of the shell filled with the preformed filler.

Description

method for making dumbbell barbell disc

Technical Field

The invention relates to the field of manufacturing of fitness equipment, in particular to a manufacturing method of dumbbell barbell discs.

Background

The dumbbell and the barbell are common fitness equipment, the barbell or the dumbbell in the prior art is generally in a structure that barbell bars or barbell plates are fixed at two ends of the barbell bars or the dumbbell bars, the traditional dumbbell barbell plates or barbell plates are directly formed into discs in a casting mode, however, the casting mode needs to consume a large amount of energy and causes large environmental pollution, the dumbbell or the barbell plates in the prior art are generally formed by adopting a shell structure and filled ingredients, the filled concrete is mainly adopted, the mode causes poor processing environment and more labor consumption, the filler is not solidified concrete with small density, the size is large under the condition of equal weight, the final disc is large in size, more space is occupied during placement and transportation, the filler needs to be cleaned after processing, the environmental pollution is caused by , the prior art also adopts a stamping forming method that a metal shell is stamped along with the filler , the method needs to adopt metal stamping materials with high cost, equipment needs to stamp , and the metal shell is easy to be stamped and used for a long time.

Disclosure of Invention

The invention aims to provide dumbbell barbell disc manufacturing methods which can effectively save labor cost, reduce product volume and improve product texture.

In order to solve the technical problems, the invention adopts the technical scheme that dumbbell barbell disc manufacturing methods are used for obtaining finished dumbbell barbell disc products through preformed filler manufacturing, shell manufacturing and injection molding;

preparing preformed filler: molding the filler of the barbell dumbbell sheet by a pressing device, wherein the preformed filler is an annular disc with a through hole in the middle;

manufacturing a shell: pouring plastic raw materials into a shell forming mold to be molded into a shell shape, and putting preformed fillers into the formed shell;

injection molding: and (4) performing hot injection molding on the joint of the shell filled with the preformed filler for fixing and sealing.

, in the process of preparing the preformed filler, the preformed filler is dried after being poured out of the die.

, in the manufacturing step of the shell, the preformed filler and the shell are packaged by -body injection molding, the preformed filler is firstly put into a mold cavity, molten plastic is poured into the mold, and the dumbbell barbell disc with the preformed filler coated by the shell is formed after cooling and mold opening.

At step , the preformed filler is shaped and then subjected to a surface smoothing process by coating the surface of the preformed filler with a tacky smoothing filler.

, in the manufacturing process of the shell, the upper shell and the lower shell are respectively injection molded, the molded upper shell and the molded lower shell respectively comprise an outer edge and an inner edge, the outer edge is spliced to form the outer edge of the shell, and the inner edge is spliced to form the mounting hole for mounting the rod.

And , after the upper shell and the lower shell are spliced, covering and fixing the joint of the upper shell and the lower shell in a hot injection molding mode.

, respectively injecting rubber sleeves covering the outer edges and the central assembly through holes of the dumbbell barbell disc after the injection molding step by putting the dumbbell barbell disc into a mold.

By adopting the technical scheme, the body is subjected to thermoplastic molding by adopting the plastic shell, the filling material is formed by presetting in a pre-molding mode and then is fixed in the shell, the density of the pre-molded filling core is greater than that of the filled material, the volume of the final disc is smaller, the occupied space is saved, the storage and the transportation are convenient, the filling process is not needed, and the cost is saved.

Drawings

FIG. 1 is a flow chart of a method of the present invention;

fig. 2 is a schematic structural diagram of a finished product manufactured in the invention.

Detailed Description

The following provides a detailed description of the present invention, which is provided to help understand the present invention but not to limit the present invention, and the technical features of the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

Referring to fig. 1, the present embodiment discloses methods for manufacturing dumbbell barbell discs, which are manufactured by performing filler fabrication, shell fabrication, and injection molding to obtain the final product.

The manufacturing method of the pre-formed filler comprises the steps of pouring the filler of the barbell dumbbell sheet into a trough of a hydraulic press, and pressing the filler into a disc shape through a pressing rod of the hydraulic press, wherein the filler can be iron sand or common sand and the like, sand mixed with annual scrap iron and other materials can be used as the filler in other specific embodiments of the invention, the filler density is increased in aspect, and waste materials can be recycled.

Manufacturing a shell: pouring plastic raw materials into a shell forming mold to be molded into a shell shape, and putting preformed fillers into the formed shell; in this embodiment, the casing is formed by injection molding the upper and lower casings separately, and then the preformed packing is put into the upper and lower casings to be split into disks. In the manufacturing process of the shell, the upper shell and the lower shell are respectively subjected to injection molding, the molded upper shell and the molded lower shell respectively comprise outer edges and inner edges, the outer edges are spliced to form the outer edges of the shell, and the inner edges are spliced to form mounting holes for mounting the rods. In the injection molding process, molten plastic is poured into the mold cavities of the upper shell and the lower shell, the upper shell and the lower shell are taken out after the molten plastic is cooled, the whole process can be carried out on a mold machine, the heating temperature of the plastic in the mold machine is determined according to the type of the selected plastic, and for example, the temperature of about 220 ℃ can be selected when PVC is adopted. The connecting part of the upper shell and the lower shell is covered and fixed in a hot injection molding mode after the shell and the lower shell are spliced, namely, the spliced shell and the lower shell are placed in a mold cavity, a gap is reserved at the corresponding position of the mold cavity of the connecting part, the side edge is a flow channel, plastic for sealing the connecting part is injected through the flow channel, and a finished product is obtained after mold opening. The position of the specific hot injection molding is the connecting position of the inner edge and the outer edge.

Preferably, the dumbbell barbell disc after the injection molding step is put into a mold to respectively inject and cover the rubber sleeve in the outer edge and the central assembly through hole, the mode of the connection part is the same as that of injection molding, the difference is that plastic adopted by injection molding is a softer material after thermoplastic molding, materials such as a silica gel sleeve can also be adopted, the material is feasible, materials such as PU can also be adopted, the shell of the product is protected after molding, the friction force can also be increased, the attractiveness of the product can be enhanced, and the mode of body injection molding is adopted, the rubber sleeve cannot be loosened in the using process, the body feeling is strong, and the product is good in texture.

Example 2

The specific embodiment discloses a manufacturing method of dumbbell barbell discs, and the finished dumbbell barbell disc products are obtained through preformed filler manufacturing, shell manufacturing and injection molding.

The method comprises the steps of manufacturing a shell, wherein the preformed filler and the shell are packaged in an body injection molding mode, the preformed filler is firstly placed in a mold cavity, molten plastic is poured into the mold, the dumbbell barbell disc with the preformed filler coated by the shell is formed after the mold is cooled and opened, the body forming mode is adopted, the formed disc is free of a connecting port, the overall shape is body forming, no gap exists in the disc forming, the phenomenon that the filler shakes in the disc forming is avoided, the damage rate is low, the product texture is strong, the preformed filler block is feasible, in order to prevent the preformed filler block from being damaged by the mold due to burrs and the like, the surface smoothing treatment is carried out after the preformed filler forming, the viscous smoothing filler is covered on the surface of the preformed filler block, the filler block can be immersed into resin or other balanced viscous materials, the surface of the preformed filler block can also be covered with a high-temperature-resistant thick plastic film, for example, the filler block can be suspended and quickly immersed into the viscous paint or the resin material.

The dumbbell barbell disc after the injection molding step is put into a mold to respectively mold a rubber sleeve covering the outer edge and the center assembly through hole, the mode of the injection molding connection part is the same as that of the injection molding connection part, the difference is that plastic adopted by injection molding is softer after being thermoplastic, materials such as a silica gel sleeve and the like can also be adopted, the rubber sleeve is used for protecting a shell of a product after being molded, the friction force can also be increased, the attractiveness of the product can be enhanced, the mode of body injection molding is adopted, the rubber sleeve cannot be loosened in the using process, the body feeling is strong, and the texture of the product is good.

Referring to fig. 2, the structure of the barbell dumbbell disk manufactured according to the present invention includes an upper casing 1, a lower casing 2 and a preformed filling core 3, wherein the upper casing 1 and the lower casing 2 are respectively formed by bodies through plastic injection molding, the upper casing 1 and the lower casing 2 are combined to form a casing for filling the preformed filling core 3, the preformed filling core 3 is fixed in the casing in a limited manner, an assembling hole for assembling a rod is formed in the center of the upper casing 1 and the lower casing 2, the preformed filling core 3 is a filler formed by pre-pressing, and the shape of the preformed filling core 3 is matched with the casing.

The upper shell 1 and the lower shell 2 respectively comprise an outer edge and an inner edge which form a surrounding block, the outer edge 11 of the upper shell 1 is matched with the outer edge 21 of the lower shell 2 in size, the outer edge 21 of the lower shell 2 is inserted into the inner side of the outer edge 11 of the upper shell 1, the inner edge 12 of the upper shell 1 is matched with the inner edge 22 of the lower shell 2 in size, and the inner edge 12 of the upper shell 1 is inserted into the inner edge 22 of the lower shell 2 to form an assembly hole for an assembly rod.

The body has outer hot plastic cover 5 all around the casing, promptly at the outer fringe plastic cover of moulding plastics of casing, this gum cover can be materials such as resin, plastics or silica gel, and outer hot plastic cover 5 carries out hot plastic forming with the casing fixed, and outer hot plastic cover 5 is soft material, conveniently places and increases frictional force.

Example 3

The specific embodiment discloses a manufacturing method of dumbbell barbell discs, and particularly relates to improvement methods in embodiment 1, wherein based on the discs in embodiment 1, the discs are connected through hot molding after the upper and lower shells are clamped, the discs are placed in a mold, injection molding materials are poured into the mold, and the outer shell is formed through injection molding, and the injection molding materials can be plastics or resin or silica gel.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.

Claims

The method for manufacturing dumbbell barbell discs is characterized in that a finished product of the dumbbell barbell disc is obtained by performing filler manufacturing, shell manufacturing and injection molding;

preparing preformed filler: molding the filler of the barbell dumbbell sheet by a pressing device, wherein the preformed filler is an annular disc with a through hole in the middle;

manufacturing a shell: pouring plastic raw materials into a shell forming mold to be molded into a shell shape, and putting preformed fillers into the formed shell;

injection molding: and (4) performing hot injection molding on the joint of the shell filled with the preformed filler for fixing and sealing.
2. The method for manufacturing dumbbell barbell discs as claimed in claim 1, wherein in the step of manufacturing the case, the pre-formed filler and the case are molded by -body injection molding to complete the packing, the pre-formed filler is put into a mold cavity, molten plastic is poured into the mold, and the dumbbell barbell disc with the pre-formed filler covered by the case is formed after the mold is cooled and opened.
3. The method of manufacturing dumbbell barbell discs as claimed in claim 2, wherein the preformed filler is subjected to surface smoothing treatment after molding, and the surface of the preformed filler is covered with an adhesive smoothing filler.
4. The method of dumbbell barbell discs as defined in claim 1, wherein the manufacturing process of the shell comprises injection molding the upper and lower shells respectively, the upper and lower shells after molding comprise an outer edge and an inner edge respectively, the outer edge is spliced to form the outer edge of the shell, and the inner edge is spliced to form the mounting hole for mounting the rod.
5. The method of claim 4, wherein the upper and lower shells are assembled and then bonded together by injection molding to cover the joint between the upper and lower shells.
6. The method of manufacturing dumbbell barbell discs as claimed in claim 4, wherein the outer case is injection molded on the outer surface by -body injection molding after the upper and lower cases are assembled.
7. The method of claim 1, wherein the injection molded dumbbell disc is placed in a mold to be injection molded with rubber covers covering the outer edges and the central through hole.