SE191848C1

SE191848C1 -

Info

Publication number: SE191848C1
Authority: SE
Publication date: 1964-01-01

Description

Uppfinnare: B Swanstein Dentin uppfinning avser ett salt for framstallning av bowlingkaglor, Hittills ha bowlingkaglor i allmanhet tillverkats av Ira och ha betingat ett tamligen Mgt pris dels pa grund av de h8ga kray, som stains pa traets kvalitet och forbehandling (torkning), dels genom arbetskostnaderna for svarvning och ytbehandling av kaglorna. Dar-till konnner, att dessa Unda kaglor av tra ha relativt kort livslangd och att spelet armed är atfoljt av ett kraftigt ovasen. Man har gjort en ansats att forminska dessa se-flare olagenheter genom att forse kaglorna med en plastbelaggning, men detta har helt naturligt medfort en ytterligare kostnadsokRing. Inventor: B Swanstein Dentin's invention relates to a salt for the production of bowling balls. To date, bowling balls have generally been manufactured by Ira and have been subject to a rather high price partly due to the high crayons, which are based on the quality and pre-treatment (drying) of the wood, and partly by the labor costs for turning and surface treatment of the cones. Dar-till konnner, that these Unda kaglor of tra have a relatively short lifespan and that the game armed is followed by a powerful oasis. An attempt has been made to reduce these seperate inconveniences by providing the cones with a plastic coating, but this has naturally led to a further cost reduction.

Uppfinningen liar till andamal att astadkomma bowlingkaglor, vilka aro billigare, stabilare till formen och hallbarare an trakaglor och med vilka bowlingspelet kan bedrivas tystare an med trakaglor, i varje fall med obelagda sadana. The invention has for its object to provide bowling balls, which are cheaper, more stable in shape and more durable than tracheal balls and with which the bowling game can be conducted more quietly than with tracheal balls, at least with uncoated ones.

Detta andamal har uppnatts genom att bowIlingkaglan framstatles enligt patentanspraket. This object has been achieved by producing the bowling ball according to the patent claim.

I det fOljande beskrives uppfinningen narmare Tried hanvisning till bifogade ritningar. Fig. 1 visar en •enligt uppfinningen frau], stãlid bowlingkagla i langdsektion. Fig. 2 ãr en projektion fran sidan av en gjutform for framstallning av bowlingkaglan. Fig. 3 fir en tvarsektion efter linjeni fig. 2. In the following, the invention is further described with reference to the accompanying drawings. Fig. 1 shows a steel bowling cone in longitudinal section according to the invention. Fig. 2 is a side elevational view of a mold for making the bowling alley. Fig. 3 shows a cross section along the line in Fig. 2.

Fig. 4 visar schematiskt en maskin for framstallning av bowlingkaglor i gjutformar medelst ett rotationsgjutningsforfarande. Fig. 4 schematically shows a machine for producing bowling cones in molds by means of a rotational molding process.

Den i fig. 1 visade bowlingkaglan bestar av en halkropp 1 av ett fast och stelt plastmaterial. Detta kan vara en term.oplast, I. ex. polyvinylklorid, ett vinylklorld-sampolymerisat sasom polyvinylkloridacetat eller en styv polyeten, eller ocksa en hardplast, t. ex. en fenoplast, en omatta.d esterplast eller en epoxiplast. Halkroppen 1, som utvandigt bar DupL kL 89 a2: 5/04 det for bowlingkdglor numera vedertagna utseendet och uppfyller allmant tillampade regler i fraga om sina matt, har en vaggtjocklek, som ar lika stor overallt utom vid bottnen av kaglan, dar denna uppvisar en massiv del 2 strackande sig ett stycke uppat i densamma for att sanka kaglans tyngdpunkt. Fran bottnen av kaglan stracker sig ett pinnhal 3 vertikalt upp genom denna del 2 fiir att tjana till instiekning av en av de pinnar, medelst vilka kaglorna placeras pfl ratt stalle vid resningen. The bowling ball shown in Fig. 1 consists of a sliding body 1 of a solid and rigid plastic material. This can be a term.oplast, I. ex. polyvinyl chloride, a vinyl chloride copolymer such as polyvinyl chloride acetate or a rigid polyethylene, or also a hard plastic, e.g. a phenoplastic, an omatta ester plastic or an epoxy plastic. The hollow body 1, which externally bore DupL kL 89 a2: 5/04 the appearance now accepted for bowling balls and meets generally applied rules in respect of its mats, has a cradle thickness which is the same everywhere except at the bottom of the cone, where it has a solid part 2 stretching a piece upwards in it to lower the center of gravity of the kaglan. From the bottom of the cone a pin haul 3 extends vertically up through this part 2 to serve for insertion of one of the pins, by means of which the cones are placed on a straight stall during the erection.

Vid iframstallningen av den ovan beskrivna bowlingkaglan anvandes ett rotationsgjutningsforfarande, varvid en gjutform sadan som den. i fig. 2 och 3 visade kan. anvandas. Denna gjutform 4 bestar av tva halvor, som kunna sammanhallas genom vilka medel soul heist fOr bildande av ett hell slutet formrum, vilket Or avpassat efter kaglans yttre kontur. Fore sammansattningen av gjutformen inlagges en pa. forhand tillverkad kropp av plast eller annat material for att bilda den Inassiva delen 2 samt infores en avpassad mangd plast, som kan vara flytande, pastaformig eller pulverformig, och den sammansatta for-men kringvrides darefter far att astadkomma en avsattning av plasten pa alla delar av formvaggen i ett vasentligen jamntjockt lager, som successivt stelnar, varefter kaglan ar fardig. In the manufacture of the bowling ball described above, a rotational molding process was used, in which a mold such as the one. shown in Figs. 2 and 3. used. This mold 4 consists of two halves, which can be held together by means of a soul lift to form a completely closed mold space, which Or is adapted to the outer contour of the cone. Before the composition of the mold, a pa is inserted. prefabricated body of plastic or other material to form the Inassive part 2 and a suitable amount of plastic is introduced, which may be liquid, pasty or powdered, and the composite mold is then twisted to cause a deposit of the plastic on all parts of the mold wall in a substantially evenly thick layer, which gradually solidifies, after which the cone is finished.

Utfiirandet av gjutningsfarfarandet, sadant det har i sina huvuddrag beskrivits, blir ollka alltefter arten av den anvanda plasten. Out .denna ar en termoplast sadan som polyvinylklorid, infores den i gjutformen sasom en plastisol. Gjutformen kringvrides relativt langsamt pa sadant satt, att den. efter vartannat intager alla rymdlagen, varvid den samtidigt Mlles uppvarmd, tills plasten hunnit avsatta sig i ett jainntjockt lager pa. formvaggen och fardiggelatinerats. Fig. 4 visar en lamplig maskin for utforande av denna 2- s. k. rotationsgjutning. I ett slutet holje 5 är en horisontal axel 6 lagrad," vars ena ande skjuter ut -ur holjet och är drivbart forbunden med en elektrisk driVmotor 7 genom en remtransmission 8, en kuggvaxel 9 och en andra remtransmission 10. Axeln 6 har ph mitten en med densamma fast sammanhangande rotorkropp 11, vilken genomgas av en mot axeln 6 vinkelrat horrning, i vilken en -axel 12 ãr vridbart lagrad. Pt sistnamnda axel är fast ett koniskt kugghjul 13, som ingriper med ett ph holjets ,ena sidovagg anbringat fast kuggdrev 14, varigenom axeln 12 medbringas i rotation, nar axeln 6 roterar. PA var och en av de ur rotorkroppen 11_ utskjutande andarna av axeln. 12 är fast en rund bord.skiva 15, som är avsedd for 11ppbdrande av ett antal lasbart fastsatta gjutforrnar 16 i en kraus runt medelpunkten och med sina langdaxlar riktade radiellt. Holjet _5 är inkopplat i en luftcirkulationskrets sa ,att (let genomgds av en. uppdtriktad varmJuftstrbm, som bestryker gjutformarna 16 for att astadkomma vannebehandlingen av den i dessa innesIutna plasten. I cirkulations,kretsen ingd ett utanfor haljet anordnat varrnebatteri 17 for uppvanuning foretradesvis _medelst anga eller elektrisk strom samt tva. flak-tar 18 drivna av elektriSka motorer 19. ,Genom en medeIst en lucka 20 tillslutbar Oppning .21 i holjets ena sidovagg kan_ den ena dnden *V- en horisontal itransportbana 22 _skjutas in i holjet for att mottaga. gjutformania 16, -nar gjutningen Or fardig. Transportbanan tjanar till att OverfOra gjutfor-mania till en kylkammare 23, i vilken de ky- - Om man i stallet for polyvinylkIorid an-Vander polyeten som pIastmaterial fOr Li- 'gelframstallningen, infOres den i gjutfor, marna i form av ett pulver, men i ovrigt kan huvudsakligen samma rotationsgjutningsforfarande som ovan beskrivits komma till anvandning. The execution of the casting process, as described in its main features, will be different depending on the nature of the plastic used. Out .this is a thermoplastic such as polyvinyl chloride, it is introduced into the mold as a plastisol. The mold is rotated relatively slowly in such a way that it. after every second, all the layers of space occupy, whereby it is simultaneously Mlles heated, until the plastic has had time to settle in an evenly thick layer on. the mold cradle and finished gelatinized. Fig. 4 shows a suitable machine for performing this 2- so-called rotational casting. In a closed housing 5 a horizontal shaft 6 is mounted, one end of which projects out of the housing and is drivably connected to an electric drive motor 7 by a belt transmission 8, a gear shaft 9 and a second belt transmission 10. The shaft 6 has a ph with the same fixedly connected rotor body 11, which is traversed by a horn perpendicular to the shaft 6, in which a shaft 12 is rotatably mounted. , whereby the shaft 12 is brought into rotation when the shaft 6 rotates, PA each of the spirits of the shaft projecting from the rotor body 11 is fixed to a round table top 15, which is intended for supporting a number of loosely attached molds 16 in a crust around the center and with its longitudinal axes directed radially. The housing 5 is connected in an air circulation circuit so that the light is passed through an inverted hot juxtaposed stream which coats the molds 16 to effect water treatment. n of the plastic contained in these. In circulation, the circuit includes an external battery 17 for heating, preferably by means of an electric or electric current and two. flats 18 driven by electric motors 19. Through an opening 20 which can be closed by a door 20 in one side cradle of the housing, one end * V - a horizontal transport path 22 can be pushed into the housing to receive. casting mold 16, -nar casting Or finished. The conveyor belt serves to transfer casting molds to a cooling chamber 23, in which they are used in the form of polyvinyl chloride using polyethylene as a plastic material for the gel production, it is introduced into castings in the form of a powder, but otherwise, essentially the same rotational molding method as described above can be used.

Vid anvandning .av hardplaster som material i 1141°n:a tillampar man ett rotations' gjutningsforfarande, vid vilket gjutforanen fOrsattes i en mycket hastig rotation omkring sin egen langdaxel, far att den flytande hardplasten skall a-vsatta sig janint ph' formvaggen och darpd. overga i fast hardat tillstand. When using hard plastics as a material in 1141 ° n: a, a rotational casting process is applied, in which the casting furnace is subjected to a very rapid rotation about its own longitudinal axis, causing the liquid hard plastic to abut the janint ph 'mold wall and darpd . surrender in solid hard state.

Claims

1. Patent ans p rak: Salt for -framstallning av bowlingkaglor, som besta av en. halkropp av plast, vilken utvdndigt bur den for bowlingkaglor vedertagna formen, kannetecknat clarav, att i en till formning av ett skal av plast tjanande rotationsgjutform inlagges forst vid bottnen av formhdlrummet en ph forhand tillverkad kropp av plast eller annat material och in-flares sedan plastmaterial i flytande form, pastaform eller pulverform, varefter gjutformen sa kringvrides omluing tvd. inbbrdes vinkelrata axlar, att plastmaterialet avsatter sig och stelnar p0 alla delar av formvdggen och ph den namnda kroppen, som ddrvid forenas med det av plastrnaterialet bildade skalet. AnfOrda publikationer: Patentskrifter Iran Sverige 121597; Schweiz 253 036; Tyskland 196351; USA. 1 583 824, 1 603 880.1. Patent application: Salt for the production of bowling balls, which consists of a. plastic body, which externally bears the shape accepted for bowling balls, can be clarified that in a rotational mold serving to form a plastic shell, a pre-made body of plastic or other material is first inserted at the bottom of the mold cavity and then plastic material is inflated. in liquid form, paste form or powder form, after which the mold is then twisted to enclose tvd. At right angles, the plastic material settles and solidifies on all parts of the mold wall and on the said body, which is thereby joined to the shell formed by the plastic material. AnfOrda Publications: Patent Papers Iran Sweden 121597; Switzerland 253,036; Germany 196351; USA. 1,583,824, 1,603,880.