A kind of celluloid-free table tennis of injection mo(u)ldingTechnical field
The invention belongs to the table tennis technology field, be specifically related to a kind of celluloid-free table tennis of injection mo(u)lding.
Background technology
It is that raw material is made that existing table tennis all adopts celluloid, adopting celluloid is that raw material making table tennis exists following disadvantage: the one, and celluloid is a kind of extremely incendive material, it is not only being stored with regard to it as feed stage, production phase, is having inflammable potential safety hazard in the transportation, and become behind the table tennis product same exist store, inflammable potential safety hazard in the transportation.The 2nd, make table tennis with celluloid, need first punching, and there is the disadvantage of became uneven in the celluloid sheet material, so that its Weight control makes it reach the Tchnical Leaflet T3 of International Table Tennis Federation standard difficulty is larger.In order to overcome above-mentioned disadvantage, International Table Tennis Federation encourages various countries to adopt new raw material to make table tennis, after this people have also proposed several and have made the technical scheme of table tennis of new raw material, as: number of patent application 01126885.9, publication number: CN 1410250 " a kind of table tennis and its preparation method ", this technical scheme table tennis material adopts low-pressure polyethylene, modified polyphenyl alkene and Merlon; Its new preparation method be plastics first through the barrel heating, then save head through the angle hollow mould and carry out the extrusion molding hollow mould and save, raw material becomes the strip of hollow, carries out progressive die twice through the secondary progressive die machine again, pipe is saved air inlet for the first time, for the second time the spherical cavity moulding.But low-pressure polyethylene loss of properties on aging; And polystyrene is a kind of brittle plastic, though its fragility of modified polyphenyl alkene has improvement, but still undesirable; And Merlon scratch resistance trace is poor, still has its limitation so make table tennis with above-mentioned material, and in addition, its weight of its forming method also is difficult to control.Number of patent application: 200680034220.X and for example, the technical scheme of publication number: CN 101272830 " table tennis of celluloid-free ", it only discloses making " table tennis of celluloid-free " main component, and unexposed making " table tennis of celluloid-free " submember, and for a kind of chemical products, not only submember is very important, the identical component different proportion is also most important, so present patent application exists inadequate disadvantage is disclosed, therefore so far yet without this table tennis listing.Number of patent application and for example: 90103206.9, publication number: CN 101850170A " modified polystyrene table tennis ball " technical scheme, MPS namely is hips, and the hips impact property is lower in engineering plastics, the most basic and require it shock-resistant for table tennis, though so this technical scheme has been applied for patent in 1990-06-26, do not adopted by people so far.Also has number of patent application: 200910038310.1, publication number: CN 101850170A " a kind of table tennis of integral seamless structure ", this table tennis is the Integratively rotational forming, because wall thickness is difficult to control, so there is too the problem of the wall thickness inequality of table tennis.Above statement shows, provide a kind of potential safety hazard few, quality can reach the Tchnical Leaflet T3 of International Table Tennis Federation standard, and the table tennis that fabrication cycle is short, cost is low and the technical scheme of preparation method are still very necessary.
Summary of the invention
The objective of the invention is to provide a kind of potential safety hazard few, quality can reach International Table Tennis Federation (Tchnical Leaflet T3) standard, the celluloid-free table tennis of a kind of injection mo(u)lding that fabrication cycle is short, cost is low.
Above-mentioned goal of the invention is achieved through the following technical solutions: a kind of celluloid-free table tennis of injection mo(u)lding, its main points are that it is by following material: BS, acrylonitrile-butadiene-styrene copolymer, cellulose acetate, colouring agent are that raw material is made; And make with following method:
A, with BS, acrylonitrile-butadiene-styrene copolymer, acetate fiber
Element, colouring agent are that raw material melts under 200～220 ℃ of temperature, and then the atmospheric pressure take pressure as 65～75Pa carries out injection moulding with the above-mentioned raw materials of fusing, and the above-mentioned raw materials that is about to fusing injects hemispherical table tennis mould;
B, will the demoulding from hemispherical table tennis mould after the moulding of hemispherical table tennis;
C, with binding agent two hemispherical tablees tennis are bonded to whole ball;
D, whole ball is put into temperature is that 100～120 ℃ swollen ball machine carries out swollen ball, and the diameter that makes it ball meets the Tchnical Leaflet T3 of International Table Tennis Federation standard;
E, with the table tennis behind the swollen ball clean, polishing, polishing.
The celluloid-free table tennis of above-mentioned a kind of injection mo(u)lding, one of its technical scheme is that described material forms by following parts by weight: 55～65 parts of BSs, 30～35 parts of acrylonitrile-butadiene-styrene copolymers, 5～10 parts of cellulose acetates, 0.1～0.5 part of colouring agent.
Because that its raw material of the present invention has is nonflammable, tough and tensile, good luster, melt fluidity are good, be difficult for the advantages such as aging, make table tennis so substitute celluloid with it, once, not only it is stored, is not had inflammable potential safety hazard in the transportation as feed stage, and can not have potential safety hazard inflammable in storage, the transportation equally after becoming the table tennis product; Two, there is not the existing disadvantage of many alternative celluloid making table tennis raw material in the background technology; Three, its preparation method is the raw material injection hemispherical table tennis mould with fusing, so the relevant table tennis diameter in International Table Tennis Federation (the Tchnical Leaflet T3) standard or title circularity, weight, center of gravity or title rollability index can be controlled by the precision of the table tennis mould in hemispherical table tennis mould, the swollen ball machine fully; Four, its production efficiency with adopt celluloid to make table tennis to compare and will improve about 20 times because adopt celluloid to make table tennis, moulding needs 28 procedures, repeatedly maintenance, arrive finished product need 60 day time again; And the present invention from raw material inject hemispherical table tennis mould, again from the demoulding of hemispherical table tennis mould, two hemispherical tablees tennis are bonded to whole ball, put swollen ball machine and carry out swollen ball, clean, polish, polish out only need 3 days of finished product to table tennis.Five, the raw material good fluidity of fusing, easy-formation processing; Raw material are difficult for aging, so the life-span of table tennis is long.
The specific embodiment
It is comprised of this example following material and parts by weight: 60 parts of BSs, and 32 parts of acrylonitrile-butadiene-styrene copolymers, 8 parts of cellulose acetates, 0.2 part of colouring agent, and make with following method:
A, with BS, acrylonitrile-butadiene-styrene copolymer, acetate fiber
Element, colouring agent are that raw material melts under 200～220 ℃ of temperature, and then the atmospheric pressure take pressure as 65～75Pa carries out injection moulding with the above-mentioned raw materials of fusing, and the above-mentioned raw materials that is about to fusing injects hemispherical table tennis mould;
B, will the demoulding from hemispherical table tennis mould after the moulding of hemispherical table tennis;
C, with binding agent two hemispherical tablees tennis are bonded to whole ball;
D, whole ball is put into temperature is that 100～120 ℃ swollen ball machine carries out swollen ball, and the diameter that makes it ball meets the Tchnical Leaflet T3 of International Table Tennis Federation standard;
E, with the table tennis behind the swollen ball clean, polishing, polishing.