CS267265B1 - Modular strand condenser for opener open-end spinning units - Google Patents

Abstract

The modular fiber strand densifier for the unifying device of a spindleless spinning unit consists of a plastic support body, which is provided with at least one locating protrusion with pins for fixation holes in a stainless steel sliding surface in the form of an insert, as well as two lateral retaining points for attaching a sheet metal prestressed yoke, which tightly surrounds the plastic funnel-shaped densifier body.

Description

HOBERLAND HERBERT,

MAŠEK VÁCLAV, JABLONEC NAD NISOU

267 265 (11 1 (51)

Int. Cl. ⁴

D 01 H 5/72 J

Modular fiber strand compactor for spindle spinning unit unifying device (57) The modular fiber strand compactor for spindle spinning unit unifying device consists of a plastic sliding body which is provided with at least one adjusting projection with pins for fixing holes in a stainless steel insert. , and two side holding points for holding a sheet metal prestressed yoke, which tightly encloses the plastic funnel - shaped body of the compactor.

CS 267265 Bl

267 265

The invention relates to a fiber strand compactor for a single yarn spinning unit which comprises a combing roller and an associated feeding device. The feed device consists of either a pair of feed rollers or a. of the feed roller and the pressure flap, between which the strand emerging from the compactor is compressed. The compactor makes it possible to achieve an even distribution of the fibers across the width of the strand in the clamping zone of the feeding device.

The fibers of the strand coming out of the feeding device are separated by a combing roller and further transported to a rotating unit - a spinning chamber, where yarns are formed from them. In order for the fibers in the feeder to be held reliably and for the active width of the combing roller to be fully utilized, the strand must be in the compactor! shaped so as to have a rectangular cross-section with evenly distributed fibers and a width corresponding to the working width of the combing roller before entering the clamping zone. If the fibers are not evenly distributed in the feeder, they are held only at the point of highest density and the other fibers are combed in larger clumps. This unevenness causes defects in the spinning space and thus poor yarn quality.

It follows that the quality of the yarn is directly derived from the design and function of the compactor and is inseparable from the correct spinless spinning technology.

The complex of factors acting on the strand of fibers passing through the compactor has already been sufficiently modeled in practice, so that the geometry and material arrangement of the compactor of the strand are. The compactor consists of a metal support body with a sliding surface with legs, a hole and a stirrup, which secures the plastic compactor itself. The metal support body is produced by the technology of precise casting from steel as a semi-finished product, which is then machined around the entire circumference, including the hole. Machining is expensive and demanding on accuracy. High surface quality is required, especially for the hole and the slip surface.

After machining, the support body is provided with an abrasion-resistant layer of chromium and polished again.

-2 267 265

The geometry of the metal support body with a sliding surface with legs, hole and caliper is very demanding for its articulation. s oh 1 o d um na oh ráhoi i í. The condition of the good function of the whole compactor assembly is the highly polished sliding surface, the polishing lotion is considerably affected by the exceeding geometry of the yoke, which completely excludes the possibility of longitudinal polishing of the sliding surface and legs. Transverse polishing disturbs the geometry of the sliding surface and the feet tear the polishing wheels. The caliper of the metal support body is formed by a non-removable fixed frame. The plastic compactor is then pushed into the yoke of the metal support body, for which it is necessary to use machinery. During the operation of the compactor in the spinning unit, the slotted outlet is sometimes damaged and the damaged part is subsequently replaced, which again requires special equipment. ’

It follows from the above description of the known embodiment of the compactor that the most demanding part of the construction is the metal support body. This causes the previously described problems in production and operation.

Said drawbacks are eliminated by the arrangement of the modular compactor according to the invention, the essence of which consists in that the support body is made of plastic and is provided on the sides with holding points for a prestressed yoke surrounding the plastic cylindrical body.

The advantages of the construction of the modular strand compactor of the invention lie in the elimination of the previously described drawbacks. They significantly simplify the production of the plastic support body and the sliding surface in the form of a stainless steel insert by completely eliminating machining, galvanic hard chrome plating and reducing the weight of the entire assembly. They eliminate the possibility of micro-corrosion between the setting pin of the spinning unit and the supporting plastic body of the compactor, thus eliminating the possibility of immobilizing the compactor. The funnel-shaped plastic body of the compactor can be easily replaced directly at the machine without the use of special equipment.

Execution of a practical example of a structural arrangement

Fig. 265 is a FIG. len spinning units, fig. 2 plastic carrier? body of a modular compactor, Fig. 3 a stainless steel sliding surface in the form of an insert, Fig. 4 a sheet metal prestressed yoke of a modular compactor,

The plastic support body 1 with the opening 2 is provided, for example, with a locating projection 3 and two pins 4 for fixing the shapes 5 of the stainless steel sliding surface 6 in the form of an insert, which is thus fixed in a position ^ secured for further manipulation. The sides of the plastic support body 1 and 1 are provided with gripping points 7 in the manner of pockets, grooves or half-grooves for fitting a pre-sprung sheet metal bracket 8, which then encircles the plastic funnel body of the compactor, thus simultaneously securing the stainless steel slide surface .

In addition, the entire assembly is secured by a securing part 10, FIG. The securing part 10 can be formed as a pin or as a screw located in the supporting plastic body 1 and extending by a hole in the plastic funnel-shaped body 9 of the compactor.

Claims (2)

A modular fiber sliver compactor for a spindleless spinning unit separator comprising a plastic funnel-shaped body with a slotted outlet for a densified fiber sliver with a continuous sliding surface in the form of an insert arranged together with a plastic funnel-shaped body on a support body which extends transversely to the fiber strand is provided with an opening for its pivotal mounting on the pin, the support body made of plastic being provided with at least one adjusting projection for fixing holes in the sliding wall and a securing part for the plastic funnel-shaped body, characterized in that the support body (1) is provided on the sides retaining points (7) for the prestressed yoke (8) enclosing the plastic funnel-shaped body (9). 2 drawings