US3698614A - Godet for yarn transport and stretching apparatus - Google Patents

Godet for yarn transport and stretching apparatus Download PDF

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Publication number
US3698614A
US3698614A US37824A US3698614DA US3698614A US 3698614 A US3698614 A US 3698614A US 37824 A US37824 A US 37824A US 3698614D A US3698614D A US 3698614DA US 3698614 A US3698614 A US 3698614A
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US
United States
Prior art keywords
godet
chromed
yarn
bands
glossy
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US37824A
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English (en)
Inventor
Bernhard Mohr
Heinz Engel
James Watt Ijsbrand Heijnis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Akzona Inc
Original Assignee
Akzona Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19691925210 external-priority patent/DE1925210C3/de
Application filed by Akzona Inc filed Critical Akzona Inc
Application granted granted Critical
Publication of US3698614A publication Critical patent/US3698614A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/225—Mechanical characteristics of stretching apparatus
    • D02J1/226—Surface characteristics of guiding or stretching organs

Definitions

  • a godet is a cylindrical roller or drum which can be rotatably driven on its axis and which is especially useful in stretching or texturizing devices.
  • the yarn or thread is normally conveyed or transported on the godet while being wrapped several times around its yarn contacting surface, often in conjunction with other rollers so that the yarn or thread can be stretched under predetermined conditions.
  • the general arrangement of feed rolls, draw rolls and other apparatus in combination with one or more godets is very well known in the production of synthetic filamentary materials, and the present invention is primarily concerned only with the surface structure of the godet itself.
  • godets are usually made of metals or metal alloys such as aluminum, copper, brass or steel. In many instances, such godets are heated in order to facilitate or properly carry out the stretching or texturizing treatment of the filaments.
  • the frequency at which these filamentary winders occur can be substantially reduced if the godet is provided with a so-called matte-chromed surface. This is accomplished by sand blasting the running or yarn contacting surface of the godet to a predetermined depth of roughness and then hard-chroming this roughened surface.
  • the depth of roughening of such matte-chromed surfaces generally amounts to about 1.5 to 40 microns, preferably about 3 to 10 microns.
  • the use of such godets having a matte-chromed surface has the draw-back, however, that there is a substantially increased slippage of the thread or yarn on the godet surface so that a complete stretching can be achieved only if the thread or yarn is wrapped a large number of times around the godet.
  • the glossy-chromed portion amounts to about 50 to percent of the total peripheral surface serving as a guide or transporting means for the yarn or thread.
  • At least three such matte-chromedstrips are required in the yarn contacting surface parallel to the axis of the godet. It was believed that such a godet would reduce the amount of thread breakage, but it has been found that such a godet does not avoid the formation of filamentary winders.
  • One object of the present invention is to provide an improved godet for use in combination with conventional yarn stretching and transporting apparatus whereby the number of turns of the yarn or thread around the godet can be minimized so as to achieve a complete stretching effect while at the same time substantially avoiding the formation of any filamentary winders.
  • Another object of the invention is to provide a specific surface structure on such godets using conventional materials and methods of forming the surface, but in such a way as to avoid the above-mentioned problems of properly stretching the thread or yarn while eliminating thread breakage and filamentary winders.
  • the cylindrical outer yarn contacting surface of the godet consists essentially of a matte-chromed surface interrupted around its circumference by two gloss-chromed surface bands running substantially parallel to each other with each point on the center line of one band being approximately diametrically opposed to a point on the center line of the other band, these bands having a substantially constant and equal width such that the are formed by a plane perpendicular to the godet axis and extending from one side to the other of the same band has a radian measurement of about 11'/ l 0 up to 11/4.
  • the two glossy-chromed surface bands can extend longitudinally on the godet cylindrical surface such that their center lines are parallel to the godet axis of rotation, i.e. such center lines being formed by the cylindrical surface and a plane passing through the godet axis of rotation.
  • the glossy-chromed portion of the godet yarn contacting surface is only about to 25 percent of the total peripheral surface.
  • FIG. 1 is a side elevational view of one godet according to the invention in which two glossy-chromed bands extend longitudinally or axially on the cylindrical yarn contacting surface;
  • FIG. 2 is a circular cross-sectional view taken on line A-A of FIG. 1;
  • FIG. 3 is a side elevational view of a preferred embodiment of the godet in which two glossy-chromed bands extend in a helical path on the cylindrical yarn contacting surface;
  • FIG. 4 is a circular cross-sectional view taken on line 8-8 of FIG. 3;
  • FIG. 5 is a developed view, reduced in size, of the cylindrical yarn contacting surface of the godet shown in FIGS. I and 2;
  • FIG. 6 is a developed view, reduced in size, of the cylindrical yarn contacting surface of the godet shown in FIG. 3 and FIG. 4;
  • FIG. 7 is a developed view, reduced in size, of the cylindrical yarn contacting surface of still another godet in which the helical path of the two glossychromed strips extends only partially around the circumference of the godet over its axial length.
  • the predominantly matte-chromed yarn contacting surface 1 of the cylindrical godet contains two glossy-chromed and very smooth bands or strips 2 and 3 extending axially of the godet such that their center lines are on diametrically opposite points of the godet circumference. Both bands or strips have the same width, and as shown in FIG. 2, the arc a formed by the cross-sectional plane between the sides 2a and 2b of band 2 and also between the sides 3a and 3b of the band 3 corresponds to only a small proportion of the entire circumference. The best results are achieved when using such a godet in accordance with the invention in which the arc or angle a amounts to approximately 1r/8.
  • this table presents the results obtained with other godets having a surface structure different from that required by the present invention even though a matte-chromed surface is combined with a glossy-chromed surface.
  • Godet No. 1 has a yarn contacting or running surface which is entirely glossy-chromed, i.e. using a conventional smooth surface having a depth of roughness of less than 0.5 microns.
  • Godet No. 2 has has two glossy-chromed bands or strips arranged axially and at diametrically opposed portions of the cylindrical yarn contacting surface as shown in FIGS. 1 and 2, but with the radian measurement of the are a amounting to 1r/2.
  • Godet No. 3 has 16 axially arranged and uniformly distributed glossy-chromed bands with a radian measurement of the arc a being 1r/ 16 for each band.
  • FIGS. 1 and 2 are constructed in accordance with the invention as shown in FIGS. 1 and 2 with the axially arranged bands or strips being diametrically opposed to each other and having a radian measurement of the are a of 1r/4 for godet No. 4 and 'n/ 8 for godet No. 5.
  • Godet No. 6 likewise has two diametrically opposed and axially arranged glossy-chromed bands, but in this instance, the radian measurement of the are a amounts to only 1r/l6.
  • godet No. 7 has a completely matte-chromed yarn contacting surface, i.e. without any glossychromed portions.
  • an especially preferred embodiment of the godet according to the invention is one in which the two diametrically opposed glossy-chromed strips or bands 4 and 5 extend in a heIi cal or spiral path around the circumference of the predominantly matte-chromed yarn contacting surface 1.
  • each point on the center line of one band is always diametrically opposed to a point on the center line of the other band.
  • the arc a between the sides 4a and 4b of one band 4 will always be diametrically opposed to the are a between the sides 5a and 5b of the other band 5.
  • the radian measurement of this arc should fall between about 1r/I0 up to a maximum of about 1r/4. Also, it is again preferred to provide these bands in such a manner that this arc has a radian measurement of approximately ar/ 8. Especially good results have been achieved when each of the glossy-chromed bands follows a helical path which generates in an angle of approximately 360 over the axial length of the godet yarn contacting surface. In other words, it is especially preferred to provide these helical bands in such a manner that they wind once around the godet over its axial length.
  • the bands can then be covered while the remaining portion of the godet surface is sand blasted to achieve a roughened surface of the desired depth. After uncovering the strips or bands which remain with a very smooth surface, the godet can then be hard-chromed to provide a very wear-resistant surface in which the roughened portions are interrupted or separated by the two individual smooth-surfaced bands.
  • Other equivalent constructions in terms of materials and wear-resistant surface layers can be employed without departing from the spirit andscope of the present invention.
  • godets constructed in accordance with the invention When operating with godets constructed in accordance with the invention, very large production runs can be obtained with practically no occurrence of filamentary winders and a very efficient stretching of the individual filaments of the yarn or thread.
  • the godets of the invention are also quite useful when it is necessary to heat or texturize the yarn or thread in the course of textile operations.
  • a rotatable godet having a substantially cylindrical outer yarn contacting surface consisting essentially of a matte-chromed surface mterrupted around its circumference by two glossy-chromed surface bands running substantially parallel to each other with each point on the center line of one band being approximately diametrically opposed to a point on the center line of the other band, each of said bands following a helical path which generates an angle of up to about 360 over the axial length of the godet yarn contacting surface and said bands having a substantially constant and equal width such that the arc formed by a plane perpendicular to the godet axis and extending from one side to the other of the same band has a radian measurement of about rr/ 1 0 up to 1r/4.
  • each of said glossy-chromed surface bands follows a helical path which generates an angle of approximately 360 over the axial length of the godet yarn contacting surface.
  • An apparatus as claimed in claim 1 wherein said are between the two sides of each band as formed by a plane perpendicular to the godet axis has a radian measurement of approximately ar/ 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Ropes Or Cables (AREA)
US37824A 1969-05-17 1970-05-15 Godet for yarn transport and stretching apparatus Expired - Lifetime US3698614A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19691925210 DE1925210C3 (de) 1969-05-17 Galette
DE2006235A DE2006235C3 (de) 1969-05-17 1970-02-12 Galette für Förder- oder Streckwerke

Publications (1)

Publication Number Publication Date
US3698614A true US3698614A (en) 1972-10-17

Family

ID=25757406

Family Applications (1)

Application Number Title Priority Date Filing Date
US37824A Expired - Lifetime US3698614A (en) 1969-05-17 1970-05-15 Godet for yarn transport and stretching apparatus

Country Status (10)

Country Link
US (1) US3698614A (de)
AT (1) AT314065B (de)
BE (1) BE748360A (de)
CH (1) CH504554A (de)
DE (1) DE2006235C3 (de)
ES (1) ES378350A1 (de)
FR (1) FR2048459A5 (de)
GB (1) GB1282386A (de)
LU (1) LU60926A1 (de)
NL (1) NL7004153A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4851172A (en) * 1984-08-21 1989-07-25 Allied-Signal Inc. Process for high speed, multi-end polyester high performance tire and industrial yarn
US5230456A (en) * 1989-08-30 1993-07-27 De La Rue Giori, S.A. Draw-roller unit for a web-printing machine
US5967395A (en) * 1996-07-04 1999-10-19 Sumitomo Wiring Systems Ltd. Terminal belt guiding mechanism to be used with a terminal crimping unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4851172A (en) * 1984-08-21 1989-07-25 Allied-Signal Inc. Process for high speed, multi-end polyester high performance tire and industrial yarn
US5230456A (en) * 1989-08-30 1993-07-27 De La Rue Giori, S.A. Draw-roller unit for a web-printing machine
US5967395A (en) * 1996-07-04 1999-10-19 Sumitomo Wiring Systems Ltd. Terminal belt guiding mechanism to be used with a terminal crimping unit

Also Published As

Publication number Publication date
ES378350A1 (es) 1973-02-01
LU60926A1 (de) 1970-07-16
CH504554A (de) 1971-03-15
AT314065B (de) 1974-03-25
DE2006235C3 (de) 1980-03-20
DE2006235A1 (de) 1971-08-19
NL7004153A (de) 1970-11-19
GB1282386A (en) 1972-07-19
DE2006235B2 (de) 1979-07-12
FR2048459A5 (de) 1971-03-19
BE748360A (fr) 1970-09-16

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