DE3021543A1 - METHOD FOR THE PRODUCTION OF PLASTIC FOOTWEAR, FOOTWEAR INSERT USED IN THIS PROCESS, AND FOOTWEAR PRODUCED BY THE PROCESS - Google Patents

Description

France SVALTFRI, Via Tranoesco Crispi ^, 91? 25 Marsala Vraranl ", Italy

V = rfehren for the production of plastic footwear, at dl-seir. Method used foot cavity insert and well jr. i-rr. Footwear manufacturing process "

The invention relates to a method of production vcn Schuhv.'erk made of plastic, one in this process used foot cavity.ieiniage and according to the. Process manufactured Footwear. More precisely, the invention relates to the manufacture of footwear, particularly high-heeled footwear. haok: .- ■: -η boots, made of plastic in a two-stage Injection molding process in which In a first work stage the "berl ~ der" and the brands are not made in one zw-it-r. Work stage the outsole and the heel on; 'V-rl el - :: · is attached.

ü-erartiga two-stage injection molding process ζ ., r production of Sohu '-. v: Erk are known. ^ the disadvantage of this known method ":" - rn is that it is difficult to install a reinforcing insert for the T-Vissi: "nier.v-'c'lbung in the rr. shoe and to support the heel rr.itein. So far this has been done in such a way that the reinforcement insert

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temporarily on the bottom plate of the Scri ~ "used to make the Cberleders mold with screws. ie usually a screw · = ^1, has been anchored, which was screwed into a heel support of the reinforcing insert, urr. to connect them to the bottom plate of Spritzgussfcrm. This method However, it can only be used for the manufacture of shoes with a relatively wide heel, in which a heel support with a relatively large diameter can be attached In addition, screwing in and unscrewing the connecting screw requires a considerable amount of time.

It is the object of the present invention to create a method which simplifies the anchoring the reinforcement insert on the bottom plate of the injection mold enables. Another object of the invention is to provide a reinforcement insert that can be manufactured of footwear with a thinner heel than was possible with the known methods.

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BAD ORiGiNAL

According to the invention, this is achieved by creating a Process for the production of footwear from plastic achieved, in which initially in a first injection molding rr.it shaft and sole part made the upper leather and the insole and then the outsole and the Heel on the upper leather in a second injection mold be attached, this procedure thereby distinguishes that for injection molding of the upper leather on the 5 ~ r.ler.part of the first injection mold one at least Reinforcement insert partly made of ferrous material hung up and by the attraction of at least one embedded in the sole part Permanent magnets held in contact with the rail part wiri, wecei the attraction of the permanent magnet like this terr.-ssen that after pouring the reinforcement insert this is detachable from the permanent magnet.

The reinforcement insert used can be advantageous a curved stable is made with one end is embedded in a rigid plastic body that has a flat horizontal surface from which a vertical heel pin extends at right angles.

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Fin ce united execution example of the inventive device Process, the reinforcement insert and the one produced with it Footwear is shown below with the aid of the drawings described in more detail, Fs lines:

Fig. I ^ ir.e side view of the in the erfindurigsgemässen V-rfahr ^ ri verv; ended reinforcement insert;

Fig. 2 - an underside view of the reinforcement unit;

F'ii *. A longitudinal section through the v; e sent borrowed T ^ iI the cei of the first stage of the invention device Procedure for H-r £ *: -> llung of footwear used Injection flow forrr. and

Fib · "- - ^ a longitudinal section through the v; esentli jnen part one after the inventions ^ e.T. a process herb "- £ tellten Women's boots.

v; ie a; ö d ^ :::: ^ lg. 1 to 3 can be seen isr., Tectehr die ce- d -> :: ■. 'rr-find ^ ngsgeniässen procedures verv; ende "oe 7erstäri-rungs-rinia ^ e essentially from a ^ = i ^v ^ ebc ^^ nen bar IC ₅ preferably made of steel'. i -: - r other ferrous '.'.'ervistcff, which is pinned by a longitudinal rib 12 and provided on a tünde rr.it through the '"open holes in the openings 14, the purpose of which is given below

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will be explained in more detail. The opposite The end of the curved bar 10 is in a heel support embedded, whose main body 16 is made of rigid: plastic, preferably acryinitrile-butadiene-styrene resin and has a lower flat horizontal surface 17, which is at right angles integral with the main body Ic manufactured vertical Acsatzstift 18 goes off, which is preferably has a thin cylindrical shape and turns into a kenic Tip 2C runs out.

^ ig. 5 Eigt the injection molding form used in the first stage of the Y-rfahr-rs according to the invention: n. 3er in Fig. 3 - t bez-i him- = th shaft part of the injection mold. is used for. Injection molding of the upper leather of a high-heeled boot. Ter '.- "emt-il the injection molding is marked with 24 · and the sleeve part rr.it 2o. Between the Kernten 2.K and the shaft part 22, is SiCN a gap 2J5, is injected into the plastic for the production of the vamp wherein the term "Upper" is of course not to be taken literally, since there is in this case made of plastic. Between the core part 24 and the splint ii 26 there is another gap 25, which is used for the one-piece production of a lightweight insole with the

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Upper serves. The gap-25 has a wider part 27 for producing a thickening in the insole, which later on with the finished footwear in a corresponding one Recess of the outsole is visible from the outside.

The rail part 26 is provided with a bearing for receiving the in the? Ig. 1 and 2 shown reinforcement insert provided. This mounting consists of a recess 26 for receiving the steel strip 10 <äer reinforcing insert and of a hole 30 for receiving the shoulder pin 18 of the reinforcing insert. Several indentations 29 are provided in the recess 28 in order to produce corresponding bulges in the injected plastic, by means of which the anchoring of the reinforcing insert vr.iz of the insole is improved. The hole J> C has an upwardly widening part 32 with a lower flat horizontal connecting surface JA, which serves as an impact surface for the shoulder formed between the main body ΐβ and the shoulder pin 18 of the reinforcement insert.

Below the recess 28 are two permanent magnets ^> 6,

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BAD ORIGUNAL

j) 8 for receiving the steel strip 10 of the reinforcement insert embedded in the part 2o of the injection mold. the Taper of part j52 of the bearing to accommodate the reinforcement insert in the sole part 26 of the injection mold is much larger than the.! wheel of main body rejuvenation the reinforcement insert, so that the during the Spritzvorgar.gs Injected plastic can penetrate into the space surrounding the main body Ic, but through the stop surface 34 on Weiterf Hessen along the heel pin lS is hindered, otherwise it would be difficult would remove the reinforcement insert from its storage in the To solve the rail part 2o of the injection mold.

The device described is normally used on turntable injection molding machines in which the sole part of the injection mold is arranged to be pivotable in the vertical direction. In the first stage of the injection molding process, the reinforcement insert is inserted into its mounting on the rail part 2.6 of the injection mold, where it is held by the permanent magnets 36, 38. Then “the sling part of the injection mold becomes the shaft part

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22 pivoted to close the injection mold. The attraction of the permanent magnets 36, 38 is such that they hold the reinforcing insert during the pivoting movement of the sole part 26 to the remaining part of the injection molding: back and forth during the subsequent injection of the plastic, but not sufficient to separate the Prevent the reinforcement insert from the insole, which is cast in one piece with the upper leather, after the end of the first stage of the Spr it ζ ν or gangs ζ λ . If the injection mold is therefore opened after the plastic has been injected, the reinforcement insert is released. the socket part of the injection mold and remains; firmly connected to the molded injection-molded part of the semi-finished footwear. Then the sole and the heel are produced in a separate injection molding process and connected to the upper leather. This separate injection molding form is not specifically shown in the drawings as it is known as ".", And does not form part of the present invention.

■ ^ ig. k shows, in longitudinal section, a skinny boot 39 produced by the method described above.

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The "outsole" cast onto the insole is shown in FIG. 4 .τιit 4c and the paragraph, in the der-Absatsstift 1 & cast is denoted by 42. How out? - It can be seen, enables the special shape of the reinforcement insert a particularly slim design of the paragraph 42.

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summary

In an injection molding process for the production of high-heeled plastic footwear using a foot cavity reinforcement insert (10), the upper leather and the insole are first produced in a first injection mold with shaft part (22) and splint part 26), the reinforcement insert (lo) with heel pin (18) is held in place by permanent magnets O6j 38) embedded in the sole part (26). The reinforcement insert engages in a bearing recess 23) provided in the sole part (26) and is cast into the insole. The attraction of the permanent magnets (36, 38) is such that the upper leather with the insole and the reinforcement insert attached to it can be detached from the permanent magnets after the plastic has been injected. By using the permanent magnets, screwing in the shoulder pin (18) can be omitted and thinner shoulders can be produced. In a second stage of the process, the outsole and the heel are cast on the insole, covering the reinforcement insert and the heel pin.

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Claims (8)

DlPL-ING. H. FINK PATENTANWALT - D 7300 ESSLINGEN NEAR STUTTGART · HINDENBURGSTRASSE PofrntanwoB FINK-D 7300 briingm (Ntdmr), HliKtenburBitrafl «44 6. JUIll 1 9 P 6622 Franco STALTERI, Via Francesco Crispi 44, 91025 Marsala fTrapani) / Italy "Process for the production of footwear made of plastic, foot cavity insert used in this process and footwear manufactured according to the process" Patent claims: 1. A method of manufacturing plastic footwear, initially in a first injection mold The upper leather and the insole are made with the shaft and sole part, and then the outsole and the heel attached to the upper leather in a second injection mold are, characterized in that for injection molding of the upper leather onto the sole part (26) the first injection mold at least partially Reinforcing insert (10) made of ferrous material is placed on top and by the attraction of at least one permanent magnet (36, 38) embedded in the sole part (26) in contact with the sole part is held, the attraction force of the permanent magnet is dimensioned so that after pouring the -1-130019 / 0624 Reinforcement insert this detachable from the permanent magnet 2. The method according to claim 1, characterized in that that the reinforcement insert (IO) improve their Anchoring with the injected plastic is provided with holes '14). J5. Method according to claim 1 or 2, characterized in that the reinforcement ^{insert 'lo) has a heel support r} l6) from which a thin cylindrical heel pin (18) extends in the direction of the heel of the footwear to be produced. 4. The method according to any one of the preceding claims, characterized in that the sole part (26) -der first injection mold for receiving the reinforcement insert (10) has a bearing (23), the shape of which corresponds to the shape of the Reinforcing insert is adapted and the additional indentations (29) to improve the anchoring of the reinforcing insert in the plastic to be injected later in the second injection mold. 5 »Reinforcement insert for use in the process according to the preceding claims 1 to 4, characterized 130019/0624 characterized in that it consists of a curved steel strip (10) consists of a: ^ nde in a rigid plastic body (16) is embedded, which has a flat horizontal surface (17), of which a vertical one at right angles Paragraph pen 'IS) comes off. " 6. Reinforcing insert according to claim 5j, characterized in that the curved steel strip (lc) -it
a stiffening rib Γ12) extending in the longitudinal direction of the same is provided. 7. Reinforcement insert according to claim 5 cdsr 6, characterized in that the curved steel strip ilG) is provided at -Ihrem free ".ende with several holes 14 ^N to improve the anchoring with the plastic. 8. By the method according to claims 1 to manufactured footwear. 1: "; 0 Q 1 9/0 6 2 4 8AD OBiQlNAU