CN1928172B

CN1928172B - Press roller support for drafting mechanism and method for producing press roller support

Info

Publication number: CN1928172B
Application number: CN2006101513772A
Authority: CN
Inventors: P·布兰肯霍尔恩; T·乌诺尔德; N·布伦克; W·勒纳; M·哈特曼; K·施蒂姆普夫伦
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2005-09-08
Filing date: 2006-09-08
Publication date: 2010-09-29
Anticipated expiration: 2026-09-08
Also published as: DE102005044081A1; CN1928172A

Abstract

The invention relates to a pressure roller support for fixing double pressure rollers in a drafting mechanism, which comprises a spring for pressing the double pressure rollers and a fixing frame for the double pressure roller shafts. The holder is a die-cast or injection-molded part, wherein the holder is cast onto the spring. Furthermore, the invention relates to a method for producing the pressure roller support, in which the spring is inserted into the mold at least in a partial region so that the holder is connected to the spring during the casting process.

Description

The pressing roller holder and the method that is used to make pressing roller holder that are used for drafter

Technical field

The present invention relates to a kind of pressing roller holder that is used for twin pressure roller is fixed on drafter, it comprises a spring and a fixed mount that is used for fixing the roll shaft of twin pressure roller that twin pressure roller is compressed, and wherein this fixed mount is poured into a mould as die casting or moulding.

In addition, the invention still further relates to a kind of method that twin pressure roller is fixed on the pressing roller holder of drafter that is used for making, one of them is connected the spring that twin pressure roller compresses with the fixed mount that is used for the twin pressure roller roll shaft, and wherein this fixed mount is poured into a mould in a mould as die casting or moulding.

Background technology

A kind of like this pressing roller holder is disclosed in DE 38 23 872 A1.On this disclosed pressing roller holder, make fixed mount with known method as aluminium diecasting, and by riveted and fixed on spring.The connection procedure of riveted joint has very high tolerance.Therefore, be necessary the fixed mount of spring utilization riveted joint is fixed in the device, and afterwards fixedly the zone of the roll shaft of twin pressure roller fixed mount is carried out smear metal processing.Process and guarantee that the drafter lower roll of twin pressure roller under accurately being parallel to later on positions by fixed mount being carried out smear metal.At this, the shortcoming of this disclosed pressing roller holder is, its manufacture process is very bothersome and comprise a lot of different operations.

Summary of the invention

Task of the present invention provides a kind of pressing roller holder and a kind of method about its manufacturing that starts described type, and the easy a lot of and included step of this method still less.

This task is being solved by fixed mount is cast on the spring aspect the pressing roller holder.Aspect method, solve this task by at least one regional area of spring being put into mould and fixed mount being connected with spring at casting process.

By in compression mod or injection mould, fixed mount being cast directly on the spring, just can save subsequently and fixed mount is fixed on this step on the spring by riveted joint.Just can get rid of the operation that on the finished product pressing roller holder, causes maximum allowance thus.Fixed mount is fixed on the spring with high precision thus, thereby can save afterwards afterwards the smear metal processing of in the fixing zone of the roll shaft of twin pressure roller fixed mount being carried out in most cases.The processing of pressing roller holder is simplified therefrom.In addition, its manufacturing cost is more economical.

Be to improve the positioning accuracy of fixed mount on spring, advantageously in casting process, the location contact pin that is provided with for duty of spring is carried out orientation with respect to mould.

In organization plan of the present invention, advantageously a retaining element that is used for the twin pressure roller roll shaft is integrated in fixed mount.This integrated can being undertaken by a semielliptic spring by above-mentioned prior art riveted joint is cast directly in the fixed mount.Semielliptic spring can be put into mould equally, thus Connection Bracket in casting process thus.

But with the organization plan advantageous particularly of retaining element as chuck.Because chuck produces in the casting process of fixed mount by the moulding of corresponding mould, so just can save this additional member of semielliptic spring.

In addition advantageously, fixed mount is made such as aluminium, zinc, magnesium or its alloy by the good material of casting character.Especially can stipulate that fixed mount is made of plastics at least to a great extent.Can realize easily that thus especially retaining element is as the organization plan of chuck.Also can stipulate at this, add the material that is used to gain in strength to plastics to a great extent, such as glass fibre.

Description of drawings

Other advantage of the present invention and feature are drawn by following description to several embodiment.

Accompanying drawing illustrates:

Fig. 1 is a side view in partial cross-section that is fixed on the pressing roller holder on the load arm;

Fig. 2 is the partial sectional view of pressing roller holder on the arrow II of Fig. 1 direction;

Fig. 3 is the view that another organization plan of pressing roller holder is similar to Fig. 1.

The specific embodiment

Part illustrates especially load arm 1 that is used for the drafter of ring spinner of a drafter in Fig. 1 and Fig. 2.Load arm 1 has a U-shaped profile 2.On a cramp bar, this cramp bar is parallel to the lower roll of drafter to this load arm at its unshowned end upper support, at one of them lower roll 9 this illustrate.Load arm 1 is guided and rigid construction on cramp bar, makes it to swing in a plane perpendicular to lower roll 9.Load arm 1 is supporting a plurality of top rolls of twin pressure roller 6 forms, and a twin pressure roller 6 wherein only is shown, and these twin pressure rollers are with corresponding quantity dispensing lower roll.Twin pressure roller 6 comprises two roller axle core rollers (Loswalze) that are bearing on the common roll shaft 7, and this roll shaft is clamped between these two roller axle core rollers.Fiber strip 10 is operation between each top roll of twin pressure roller 6 and lower roll 9, and fiber strip is drawing to desired fineness in drafter.For drafter and this fibrous material are complementary, be necessary on the traffic direction of fiber strip 10, just load arm 1 vertically on can regulate twin pressure roller 6.In addition, as far as possible accurately to carry out parallel orientation also very important with lower roll 9 to make twin pressure roller 6.

The roll shaft 7 of twin pressure roller 6 is arranged in the fixed mount 8, and this fixed mount 8 has one and is roughly semi-cylindrical recess.By means of a retaining element 11 roll shaft 7 is fixed in this recess, this retaining element is semielliptic spring 25 in the embodiment of being described.

The fixed mount 8 of roll shaft 7 is fixed on the spring 12, and this spring 12 is leaf spring preferably.Scheme as an alternative, spring 12 also can be a helical spring in another embodiment.By the present invention's regulation, fixed mount 8 is manufactured die casting or moulding, wherein fixed mount 8 casts directly on the spring 12.Spring 12 is before casting process or entirely put into mould, or puts into mould with a regional area 13 at least, and is surrounded by this material when spraying into material in the mould.At this advantageously, this regional area 13 of spring 12 has recess 27 or aperture 28, fixedlys connected thereby produce between fixed mount 8 and spring 12.At this, semielliptic spring 25 is put into mould equally, and is connected with fixed mount 8 in die casting or injection moulding process.

Spring 12 has the section of hairpin shape bending in the zone of fixed mount 8 dorsad, spring 12 is fixed in the spring(-supported) mount 15 in this section, and spring(-supported) mount 15 itself also is clamped in the profile 2 of load arm 1.Spring(-supported) mount 15 have equally U-shaped towards lower roll 9 open profiles.Screw in screw element 19 in its transversal web 16, screw element 19 then passes the transversal web 3 of profile 2 in a longitudinal slot, thus can load arm 1 vertically on spring(-supported) mount 15 is moved and fixes.

Spring 12 is furnished with two contact pin opposite each other 22,23 on a supporting leg 14 of hairpin shape section, these two contact pin be inserted into spring(-supported) mount 15 the edge of a

wing

17,18 in the slot-shaped fixed mount 29 of under shed.In the scope of these two

contact pin

22 and 23, arranged a clamp 30 in the bottom of the supporting leg 14 of spring 12, this clamp 30 pushes in the edge of a

wing

17 and 18 corresponding recess 32 of spring(-supported) mount 15 from the side.This clamp 30 is furnished with a half-cylindrical rib 31, and the latter extends transverse to load arm 1, and upwards loads to

location contact pin

22 and 23 towards the end direction of fixed mount 29.

The size of

location contact pin

22,23 leans on the inwall of the supporting leg 4 of the profile 2 of

load arm

1 and 5 it, and guides on these two inwalls.The free end of the supporting leg 14 of spring 12 is furnished with two other

location contact pin

20 and 21, they load arm 1 vertically on the outstanding spring(-supported) mount 15 that surpasses, and correspondingly with

location contact pin

22,23 on the inner surface of the supporting

leg

4,5 of profile 2, guide equally.Therefore spring 12 directly guides on the inner surface of the supporting

leg

4,5 of the profile 2 of load arm 1 in the horizontal by

location contact pin

20,21,22,23, this means that it has nothing to do with spring(-supported) mount 15.Unclamping and moving of spring(-supported) mount 15 do not exert an influence to this orientation between spring 12 and the load arm 1.For the free end of the supporting leg 14 in the hairpin shape zone of spring 12 sets the loading element of cam pin 36 forms, this cam pin is furnished with two eccentric surfaces that scabble 37 and 38, and these two surfaces selectively touch supporting leg 14.According to the radius of

eccentric surface

37 or 38, spring 12 is carried out pretension.

For another supporting leg 24 in the hairpin shape zone of spring 12 sets a backstop, this backstop is configured to the form of a pin 35 between the edge of a

wing

17,18 that is arranged in spring(-supported) mount 15.When load arm 1 when lower roll 9 breaks away from, this pin 35 has limited the possible stroke of the supporting leg 24 of spring 12.

Determined location under spring 12 in working order by location contact pin 20 to 23 thus.Therefore advantageously in the die casting of fixed mount 8 or injection moulding process, utilize these location contact pin 20 to 23 equally, so that spring 12 is navigated in the mould.Thus, can further improve the positioning accuracy of twin pressure roller 6 with respect to load arm 1.

A kind of flexible program of the fixed mount 8 of pressing roller holder shown in Figure 3.Identical member all is furnished with same Reference numeral, thereby can save again explanation at this.Fixed mount 8 casts directly on the spring 12 once more, and method is to put into mould to major general's regional area 13 in the die casting of fixed mount 8 or injection moulding process.Prevent that the retaining element 11 that the roll shaft 7 of twin pressure roller 6 comes off is integrated in the fixed mount 8 as chuck 26 in this embodiment.The advantage of doing like this is to save independent manufacturing semielliptic spring 25 these steps.When fixed mount 8 is made of plastics to a great extent, can realize this organization plan of fixed mount 8 especially well.In order to make plastics indeformable in time on the roll shaft 7 that pressure is delivered to twin pressure roller from spring 12, the material that can gain in strength for the plastics fusion to a great extent is such as glass fibre.Do not have influence on the machinability in injection moulding process thus, but very prevented " creep " of plastics effectively.

Claims

1. be used for twin pressure roller (6) is fixed on the pressing roller holder of drafter, comprise a spring (12) and the fixed mount (8) that is used for twin pressure roller (6) roll shaft (7) that twin pressure roller (6) is compressed, wherein this fixed mount (8) is poured into a mould as die casting or moulding, it is characterized in that described fixed mount (8) is cast on the spring (12).

2. by the described pressing roller holder of claim 1, it is characterized in that described fixed mount (8) is made of plastics at least to a great extent.

3. by claim 1 or 2 described pressing roller holders, it is characterized in that integrated retaining element (11) that is used for twin pressure roller (6) roll shaft (7) in described fixed mount (8).

4. be used for making the method that twin pressure roller is fixed on the pressing roller holder of drafter, wherein, the spring that compresses described twin pressure roller is connected with the fixed mount that is used for the twin pressure roller roll shaft, and wherein said fixed mount is cast in the mould as die casting or moulding, it is characterized in that, described spring is put into mould with a regional area at least, and described fixed mount is connected with this spring in casting process.

5. by the described method of claim 4, it is characterized in that described spring carries out orientation with the location contact pin that it is duty is provided with respect to mould in casting process.

6. by claim 4 or 5 described methods, it is characterized in that, in casting process, a retaining element that is used for the twin pressure roller roll shaft is integrated in fixed mount.