DE2033547C - Device for the continuous production of small parts by injection molding - Google Patents

Claims (1)

The invention relates to a device zippers in the webs, which the individual for the continuous production of small parts, in particular to separate mold halves from one another, one, given ien- special link chains of zippers, if necessary also two recesses, one of which Injection molding processes, in particular made of plastic. the bead of the textile carrier tape receives the It is known (German Offenlegungsschrift 5 other in special cases a later removed strand 1435 780), small plastic parts, in particular those used to produce undercut receptacles for Link chains of zippers, in injection molding the hook links of the counter chain of the zipper, drive in a machine where two The roller conveyors and support belts have two endless edgewise circumferential steel belts with tasks, namely once the profile belts on the complementary mold halves are provided, an io largest part of their surfaces and exclusively there Go through the injection chamber, in which the mold halves are pressed together, in the remaining part of the belts are supplemented to molds open on one side and with which the molds can only be held against the casting pressure, plastic made plasticized by heat filled with a compression of the profile strips in the ..w. J _... ITHipilUUllLllCIl, iUIIIItIllia5 «.llifc.ii Dwiw ·». «· · .-. ni ^ kli. Il The form holders must be removed from the bands. worked out. Dits can - in the case of hard steel - The drawing shows, for example, a schematic un-.l tapes and the required high accuracy - partly in section an embodiment of the Vornur with expensive and time-consuming processes such. B. direction of the invention for the production of a ripping spark erosion done. The recess locking coupling link chain is also
gen, in which according to the proposal of the USA patent specification ac F i g. 1 a cross-section through the band package,
3 454 984 interchangeable molds can be used that could not be produced otherwise. Cut-out from a mold carrier tape in opposite In the case of riveting, soldering or welding on the scale enlarged in FIG. 1,
Shapes these burst when the belt circulates around Fig. 3, a section along line IH-III of Fig. 4, the drive and deflection pulleys off regularly. As Fig. 4 is a plan view of a portion of the ·. This phenomenon is based on the fact that the strips and mold carrier strips The Invention Figure 5 shows a single link divided in half The underlying task is to use the known endless slide fastener chain. circumferential pairs of steel strips that:: it each other as shown in Fig. 1 of the drawing, are complementary mold halves are provided, this mold 30, the two profile strips 2, 2 'and the two support halves interchangeably and permanently on the steel strips 3, 3' to fasten upright, possibly with the underneath. The solution to this problem is a support belt on a roller conveyor 4.
lingt, if the mold carrier tapes with smooth The tape package 3, 2, 2 ', 3' runs between two Steel bands are deposited. In this case over roller conveyors 5, 5 '. The surface of the profile strips take the mold carrier bands (profile bands) 35 2, 2 'is designed so that the bands with the outside supporting smooth steel belts the whole tension surfaces 6, 6 'against each other and from the roller force and carry the profile strips with them. lanes 5, S 'there, but also only there, together- They can now be depressurized by the support belts. The surfaces 7, 7 'are unloaded Profile strips in an edge recess a gene and serve to accommodate the textile strip 18. Wear strips of easily deformable material in 40 The narrow strips 8, 8 'protrude from the surfaces 7. which the mold halves are embedded. 7 'out, but not as high as the This strip is a surface 6, 6 'in the edge recess. They are used to build the textile belt 18, for. B. soldered or glued flush. Also to be clamped, which then needs to be used as a seal against the casting material penetrating the molds, as is the case with experiments. In the shows, the mold carriers, which are hard to deform, hardened steel, are no longer made up of the particularly 45 recesses 9, 9 ', strips 10 are soldered in or glued in. The soldering or rather you can also use adhesive layer for these tapes is denoted by 11,
malleable materials such as phosphor bronze, the mold carrier strips 2, 2 'are z. B. from phos- turn. Even if the actual mold halves are phorom bronze or some other easily deformable material, according to the invention, no longer made in the profile band itself, 50 material. The mold carrier strips 10 but in a mold strip z. B. from subsequent - are best made of hard chrome-plated copper, which is hard-lent after deformation, so chrome-plated copper is made,
the cross-section of the profile bands is still not The webs 12, between the forms 13, have a smooth, but variously stepped. ₍ Recess 14 for receiving the bead 17 The two profile strips in the working 55 of the textile strip 18 and a recess 15 for the area with the largest part of their surfaces must lie smoothly on each other, receiving a strand 16 to be removed later, in order to be able to move from the roller conveyors over the , Brace straps to be pressed together; but where the strand 16 was in the mold, they have a hole 19, for example in the manufacture of zippers (Fig. 5), in which the projections engage link chains over the rest of their surfaces each 60 20 of the opposite row when closing. Such zipper clubs recess for storage of the textile carrier key are known from the USA patent 3 487145 tape for the zipper chain each one from the strip (corresponding to the post-published German recess for the clamp-in patent 1 610322),
men of the tape and finally the edge recesses for inserting the molding strip. 63 claims: Dk soldered or glued strips into the 1st device for continuous production the mold halves of the small parts are embedded, of small parts, such as link chains in particular have in the production of coupling elements for zippers, in the injection molding process, in particular made of plastic, in which two endless, edgewise circumferential, backed with smooth support strips support mold halves, which complement each other in an injection chamber that runs through the strip package together to form molds filled with GuB material, characterized in that the support belts (3 , 30 tension-relieved profile strips (2, 2) ir. An edge recess (9) carry a strip (1Θ) made of easily deformable material into which the mold halves (13) are embedded. 2. Device according to claim 1, characterized in that the Strips (10) into which the mold halves (13) are embedded are soldered or glued flush into the edge recesses (9, Ψ) of the profile strips (2, 2). 3. Apparatus according to claim 1 or 2, characterized in that the profile strips (2, 2 ') consist of phosphor bronze. 4 Device according to one of the preceding claims, characterized in that the Strips (10) into which the mold halves (13) are embedded, made of subsequently hard chrome-plated Made of copper. 1 sheet of drawings