CA1168816A - Method of manufacturing a slide fastener stringer - Google Patents
Method of manufacturing a slide fastener stringerInfo
- Publication number
- CA1168816A CA1168816A CA000366814A CA366814A CA1168816A CA 1168816 A CA1168816 A CA 1168816A CA 000366814 A CA000366814 A CA 000366814A CA 366814 A CA366814 A CA 366814A CA 1168816 A CA1168816 A CA 1168816A
- Authority
- CA
- Canada
- Prior art keywords
- tape
- holes
- stringer
- series
- horn
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 230000008878 coupling Effects 0.000 claims abstract description 13
- 238000010168 coupling process Methods 0.000 claims abstract description 13
- 238000005859 coupling reaction Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000012209 synthetic fiber Substances 0.000 claims abstract description 4
- 229920002994 synthetic fiber Polymers 0.000 claims abstract description 4
- 238000002844 melting Methods 0.000 claims abstract description 3
- 230000008018 melting Effects 0.000 claims abstract description 3
- 238000001746 injection moulding Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims 2
- 238000004873 anchoring Methods 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 2
- 239000012768 molten material Substances 0.000 description 2
- OWNRRUFOJXFKCU-UHFFFAOYSA-N Bromadiolone Chemical compound C=1C=C(C=2C=CC(Br)=CC=2)C=CC=1C(O)CC(C=1C(OC2=CC=CC=C2C=1O)=O)C1=CC=CC=C1 OWNRRUFOJXFKCU-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D5/00—Producing elements of slide fasteners; Combined making and attaching of elements of slide fasteners
- B29D5/02—Producing elements of slide fasteners; Combined making and attaching of elements of slide fasteners the fasteners having separate interlocking members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
- B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
- B29C65/086—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary anvil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
- B29C66/137—Beaded-edge joints or bead seals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/729—Textile or other fibrous material made from plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
- B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
- B29C66/81419—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled and flat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
- B29C66/81429—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth comprising a single tooth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
- B29C66/8181—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
- B29C66/81811—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws
- B29C66/81812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws the welding jaws being cooled from the outside, e.g. by blowing a gas or spraying a liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
- B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
- B29C66/83411—Roller, cylinder or drum types
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
- B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
- B29C66/83411—Roller, cylinder or drum types
- B29C66/83415—Roller, cylinder or drum types the contact angle between said rollers, cylinders or drums and said parts to be joined being a non-zero angle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2005/00—Elements of slide fasteners
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Slide Fasteners (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Treatment Of Fiber Materials (AREA)
- Making Paper Articles (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A series of equally spaced holes are formed in a slide fastener stringer tape including synthetic fiber by thrusting and melting away tape portions spaced along a marginal edge of the tape on and between an ultrasonically vibrating horn and an endless series of anvil teeth successively pressable against the horn. The stringer tape is then moved away from the horn so as to be cooled for thereby setting the holes. Thereafter, a series of coupling elements are injection-molded onto the stringer tape over the holes. The advance in the art is in that by using solely the melting-away procedure, the holes are dimensionally stable. The threads are prevented from fraying in the holes, with the resulting improved anchoring of the elements on the tape.
A series of equally spaced holes are formed in a slide fastener stringer tape including synthetic fiber by thrusting and melting away tape portions spaced along a marginal edge of the tape on and between an ultrasonically vibrating horn and an endless series of anvil teeth successively pressable against the horn. The stringer tape is then moved away from the horn so as to be cooled for thereby setting the holes. Thereafter, a series of coupling elements are injection-molded onto the stringer tape over the holes. The advance in the art is in that by using solely the melting-away procedure, the holes are dimensionally stable. The threads are prevented from fraying in the holes, with the resulting improved anchoring of the elements on the tape.
Description
BACKGROUND OF THE INVENTION
.. . . . .
Field of the Invention:
- - .
The present invention relates to a method of manufacturing a slide fastener stringer including coupling elements injection-molded on a stringer tape over holes in a marginal edge thereof.
Prior Art:
Slide fastener stringers of the type described are produced "by perforating a striner tape and then injection molding coupling elements on the tape over the hol~s. The holes have been formed by a p~nch or pointed pin which is however disadvantageous in ,that the punched holes tend to be enlarged and cause the strands 'of the tape to fray when the tape is tensioned, and the tape strands spread by the pin are likely to come back soon and at worst close off the holes.
U. S. patents 2,041,848 and 2,735,139 patented on ~ay 26, ~1936 and February 21, 1956, respectively, disclose solutions to 'the problems. According to the former patent, holes are pierced ; ,through the tape outside mo~ding dies and coupling elements are ;injection-molded one at a time in the dies over the hole. Such 'an arrangement is therefore quite poor in efficiency. The latter ;~ ~patent discloses a pin which passes through the tape in the dies and is withdrawn as the hole is filled with molten material on ~injection-molding. The disclosed dies are relatively complicated in structure because of the necessity of coordinated movement ' ,between the dies and the pin. A common difficulty with the prior patents is that one-by-one formation of holes tends to result in ~irregularities in size and pitch of the holes.
.; , ~.
, . 1 . -- 1 , It is arl o~ject of the present invention to provide a method of manufacturing a slLde fastener stringer having a series of equally spaced holes at which a series of coupling elements are disposed,respectively.
Another o~ject of the present invention is to provide a method of manufacturing slide fastener stringer having such holes that are dimensionaLly stable and have edges set for preventing tape fiber ox threads from fraying.
S-till another. object of the present invention is to provide a me~hod of manufacturing a sllde fastener stringer successively at a hlgh rate of production.
In general terms, the present invention provides a method of manufacturing a slide fastener stringer, comprising the steps of: (a) successively forming a series of holes in and along a marginal edge of a stringer tape including s~nthetic fiber by ultrasonically melting away tape portions at equal intervals; (b) cooling said stringer tape to set said holes;
and (c) injection-molding a series of coupling elements at a time on said tape respectively over said holes.
Many other advantases, features and additional obJects of the present lnvention will become manifest to those versed in ~the art upon maki ng reference to the detai~ed description and the accompanying drawings in ~hich a prelerred embcdiment incorporating the principles of the present invention is sno~
by way of illustrative exalnple.
sRIEF DESCRIPTION OF THE DRAWINGS
_ . .
FIG. 1 is a fragmentary plan view showing the manner in ! which a slide fastener stringer is successively formed according to a method of the present invention;
, FIGS. 2 is an enlarged cross~sectional view taken along ,;line II - II of FIG. l;
FIGS. 3 ~on the sheet of Fig. 1) is a side elevational view of an ; apparatus for carrying out the method of the present invention;,and FIG. 4 is an enlarged vert:Lcal cross-sectional view of a device for forming holes in a str:inger tape.
DETAILED DESCRIPTION
As shown in FIG. 1, a continuous substan-tially endless stringer tape 10 made up of synthetic yarns or blended yarns ; lincluding synthetic fiber including a beaded edge 11 is first provided with a series of holes 12 in and along a longitudinal marginal tape edge adjacent to the beaded edge 11, the holes 12 l,being equally spaced an interval or pitch P from each o-ther. A
.. - i series of coupling elements 13 of synthetic resin are injection-imolded around the beaded edge 11 and respectively over the holes 12. As best shown in FIG. 2, each of the coupling elements 13 includes a pair of legs 13a, 13b one on each side of the stringer ltape 10 which are interconnected by an integral bridge 15 extend-ing through one of the holes 12, the bridge 15 being formed by a mass of molten material flowed into the hole 12 during injection-molding. With the bridges 15 extending across and through the stringer tape 10, the coupling elements 13 are securely anchored in position on the stringer tape 10. A slide fastener stringer 14 is thus formed.
FIG. 3 illustrates an apparatus 16 for carrying out a method of manufacturing such slide fastener stringer 14.
.'`
, ~ ~t~
'I The apparatus 1.6 comprises at one end a pair of upper and lower feed rolls 17,18.for feeding.the stringer tape lO.which is then .tensioned to a suitable degree by a tension roll lg before being .. directed by a guide.20 on a ba~e frame 21 toward a device 22 for . forming the holes 12 in the .tape 10.
The device .22.comprises an ultrasonically vibratable horn 23 which projects upwardly through an opening 24 in the base frame ~ 21, and a circular anvil 25.rotatably mounted by a shaft 26 on i' a bracket 28 on the base frame.'21, the .shaft 26 be.ing dr.iven by I a motor (not shown). The horn 23 may be of any kno.wn structure !l employed in ultrasonic welding. The circular anvil 25 has a ¦I series of teeth or projections 29 around the circumference thereof ¦I which extend rad;ally outwardly, the tee'th 29 being circumferential-ly spaced from each other by the interval or pitch P. ..The téeth 29 are held perpendicularly against the horn 23 as the anvil , 25 rotates. As the stringer tape 10 moves forwardly in the idirection of the arrow 30,.it is sandwiched between .the horn 23 while the latter is ~eing ultrasonically vibrated and the -teeth 29 as they are brought into.contact with.the'horn 23 upon rotation ~ ~lof the anvil 25.in theldirection of the arrow.31. When the tape lllO passes between.the horn 23 and the anvil 25, the:teeth 29 are l'thr.ust .into the tape 10 against the horn-23 as tape portions ; registering with the teeth 29 are melted away by the heat generat-~ed by the ultrasonically vibrating horn 23. The edges o~ the holes 12 thus formea are fused and set while.the tape 10 is carried on the anvil 25 with the teeth 29 in the. holes 12 away I ~rom the horn 23 in an arcuate path or region 32 where the tape : llo is cooled forcibly or by natural convection of air.
Accordingly, the holes 12 are free of fraying and more .stable dimensionally than would be formed by mere piercing or spreading of the .strands of the tape 10.
A scraper 33 is mounted on the bracket ~8 and has a tip end 27. located adjacent to the:cir.cumference o~.the anvil 25 and substantially diametrically opposite to the horn.23. The scraper 33 has a nozz.Ie 34 for blowing ai.r at a.room temperature to the anvil 25 to cool.the latter. The .tape 10, which has adher.ed at the holes 12 to the.teeth .29., is detached reliably by the scraper 33 and.is caused to travel around a roll 36 rotatably mounted on a shaft 37 on a support 28 mounted on.the base frame .
As shown in FIG. 3, the.stringer tape 10 with the holes l¦12 formed therein goes:through a pitch gauge 40.and then is lidriven forwardly by a pair of upper and lower feed rolls 41,42 for being stored in a suitable container (not.shown). The stringer tape lO.is.then retrieved from the container so as to be intermittently fed into a injection-molding device 43. Such ~storage-and-retrieval is necessary since the in]ection-molding is performed on the tape 10 in an intermittent manner as described below. The injection-molding device 43 has a pair of upper and lower dies 44,45 which coact with each other to sandwich a unit length of the stringer tape lO.and to injection-mold a number of coupling elements 13 at a time on the tape lO.in registration with.the holes 12, thereby-producing a unit length of slide fastener stringer 14. The injection-molding device 43 can be operated repreatedly on the intermittently fed stringer tape 10 to injection-mold as many successive series of coupling elements 13 as desired, so that any desired lengths of the stringer 14 which are increments of.the,unit stringer can be produced. The slide fastener stringer 14 thus completed is discharged by a pair of withdrawal rolls 46,17 for storage.
Although various minor modificatiOnS might be suggested . by.those versed in the art, it should be understood that we wish to embody within.the .scope of the patent warranted hereon, all . such embodiments as reasonably and properly come within the scope of our contribution to the art.
. .
, . ,, ' ' , !
. .
i, .: .' ''.
~ .' .'~ - i, .`~. ~ .`
~ .
~ , - 6 -.'~ .
.. . . . .
Field of the Invention:
- - .
The present invention relates to a method of manufacturing a slide fastener stringer including coupling elements injection-molded on a stringer tape over holes in a marginal edge thereof.
Prior Art:
Slide fastener stringers of the type described are produced "by perforating a striner tape and then injection molding coupling elements on the tape over the hol~s. The holes have been formed by a p~nch or pointed pin which is however disadvantageous in ,that the punched holes tend to be enlarged and cause the strands 'of the tape to fray when the tape is tensioned, and the tape strands spread by the pin are likely to come back soon and at worst close off the holes.
U. S. patents 2,041,848 and 2,735,139 patented on ~ay 26, ~1936 and February 21, 1956, respectively, disclose solutions to 'the problems. According to the former patent, holes are pierced ; ,through the tape outside mo~ding dies and coupling elements are ;injection-molded one at a time in the dies over the hole. Such 'an arrangement is therefore quite poor in efficiency. The latter ;~ ~patent discloses a pin which passes through the tape in the dies and is withdrawn as the hole is filled with molten material on ~injection-molding. The disclosed dies are relatively complicated in structure because of the necessity of coordinated movement ' ,between the dies and the pin. A common difficulty with the prior patents is that one-by-one formation of holes tends to result in ~irregularities in size and pitch of the holes.
.; , ~.
, . 1 . -- 1 , It is arl o~ject of the present invention to provide a method of manufacturing a slLde fastener stringer having a series of equally spaced holes at which a series of coupling elements are disposed,respectively.
Another o~ject of the present invention is to provide a method of manufacturing slide fastener stringer having such holes that are dimensionaLly stable and have edges set for preventing tape fiber ox threads from fraying.
S-till another. object of the present invention is to provide a me~hod of manufacturing a sllde fastener stringer successively at a hlgh rate of production.
In general terms, the present invention provides a method of manufacturing a slide fastener stringer, comprising the steps of: (a) successively forming a series of holes in and along a marginal edge of a stringer tape including s~nthetic fiber by ultrasonically melting away tape portions at equal intervals; (b) cooling said stringer tape to set said holes;
and (c) injection-molding a series of coupling elements at a time on said tape respectively over said holes.
Many other advantases, features and additional obJects of the present lnvention will become manifest to those versed in ~the art upon maki ng reference to the detai~ed description and the accompanying drawings in ~hich a prelerred embcdiment incorporating the principles of the present invention is sno~
by way of illustrative exalnple.
sRIEF DESCRIPTION OF THE DRAWINGS
_ . .
FIG. 1 is a fragmentary plan view showing the manner in ! which a slide fastener stringer is successively formed according to a method of the present invention;
, FIGS. 2 is an enlarged cross~sectional view taken along ,;line II - II of FIG. l;
FIGS. 3 ~on the sheet of Fig. 1) is a side elevational view of an ; apparatus for carrying out the method of the present invention;,and FIG. 4 is an enlarged vert:Lcal cross-sectional view of a device for forming holes in a str:inger tape.
DETAILED DESCRIPTION
As shown in FIG. 1, a continuous substan-tially endless stringer tape 10 made up of synthetic yarns or blended yarns ; lincluding synthetic fiber including a beaded edge 11 is first provided with a series of holes 12 in and along a longitudinal marginal tape edge adjacent to the beaded edge 11, the holes 12 l,being equally spaced an interval or pitch P from each o-ther. A
.. - i series of coupling elements 13 of synthetic resin are injection-imolded around the beaded edge 11 and respectively over the holes 12. As best shown in FIG. 2, each of the coupling elements 13 includes a pair of legs 13a, 13b one on each side of the stringer ltape 10 which are interconnected by an integral bridge 15 extend-ing through one of the holes 12, the bridge 15 being formed by a mass of molten material flowed into the hole 12 during injection-molding. With the bridges 15 extending across and through the stringer tape 10, the coupling elements 13 are securely anchored in position on the stringer tape 10. A slide fastener stringer 14 is thus formed.
FIG. 3 illustrates an apparatus 16 for carrying out a method of manufacturing such slide fastener stringer 14.
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'I The apparatus 1.6 comprises at one end a pair of upper and lower feed rolls 17,18.for feeding.the stringer tape lO.which is then .tensioned to a suitable degree by a tension roll lg before being .. directed by a guide.20 on a ba~e frame 21 toward a device 22 for . forming the holes 12 in the .tape 10.
The device .22.comprises an ultrasonically vibratable horn 23 which projects upwardly through an opening 24 in the base frame ~ 21, and a circular anvil 25.rotatably mounted by a shaft 26 on i' a bracket 28 on the base frame.'21, the .shaft 26 be.ing dr.iven by I a motor (not shown). The horn 23 may be of any kno.wn structure !l employed in ultrasonic welding. The circular anvil 25 has a ¦I series of teeth or projections 29 around the circumference thereof ¦I which extend rad;ally outwardly, the tee'th 29 being circumferential-ly spaced from each other by the interval or pitch P. ..The téeth 29 are held perpendicularly against the horn 23 as the anvil , 25 rotates. As the stringer tape 10 moves forwardly in the idirection of the arrow 30,.it is sandwiched between .the horn 23 while the latter is ~eing ultrasonically vibrated and the -teeth 29 as they are brought into.contact with.the'horn 23 upon rotation ~ ~lof the anvil 25.in theldirection of the arrow.31. When the tape lllO passes between.the horn 23 and the anvil 25, the:teeth 29 are l'thr.ust .into the tape 10 against the horn-23 as tape portions ; registering with the teeth 29 are melted away by the heat generat-~ed by the ultrasonically vibrating horn 23. The edges o~ the holes 12 thus formea are fused and set while.the tape 10 is carried on the anvil 25 with the teeth 29 in the. holes 12 away I ~rom the horn 23 in an arcuate path or region 32 where the tape : llo is cooled forcibly or by natural convection of air.
Accordingly, the holes 12 are free of fraying and more .stable dimensionally than would be formed by mere piercing or spreading of the .strands of the tape 10.
A scraper 33 is mounted on the bracket ~8 and has a tip end 27. located adjacent to the:cir.cumference o~.the anvil 25 and substantially diametrically opposite to the horn.23. The scraper 33 has a nozz.Ie 34 for blowing ai.r at a.room temperature to the anvil 25 to cool.the latter. The .tape 10, which has adher.ed at the holes 12 to the.teeth .29., is detached reliably by the scraper 33 and.is caused to travel around a roll 36 rotatably mounted on a shaft 37 on a support 28 mounted on.the base frame .
As shown in FIG. 3, the.stringer tape 10 with the holes l¦12 formed therein goes:through a pitch gauge 40.and then is lidriven forwardly by a pair of upper and lower feed rolls 41,42 for being stored in a suitable container (not.shown). The stringer tape lO.is.then retrieved from the container so as to be intermittently fed into a injection-molding device 43. Such ~storage-and-retrieval is necessary since the in]ection-molding is performed on the tape 10 in an intermittent manner as described below. The injection-molding device 43 has a pair of upper and lower dies 44,45 which coact with each other to sandwich a unit length of the stringer tape lO.and to injection-mold a number of coupling elements 13 at a time on the tape lO.in registration with.the holes 12, thereby-producing a unit length of slide fastener stringer 14. The injection-molding device 43 can be operated repreatedly on the intermittently fed stringer tape 10 to injection-mold as many successive series of coupling elements 13 as desired, so that any desired lengths of the stringer 14 which are increments of.the,unit stringer can be produced. The slide fastener stringer 14 thus completed is discharged by a pair of withdrawal rolls 46,17 for storage.
Although various minor modificatiOnS might be suggested . by.those versed in the art, it should be understood that we wish to embody within.the .scope of the patent warranted hereon, all . such embodiments as reasonably and properly come within the scope of our contribution to the art.
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Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method of manufacturing a slide fastener stringer, comprising the steps of:
(a) successively forming a series of holes in and along a marginal edge of a stringer tape including synthetic fiber by ultrasonically melting away tape portions at equal intervals;
(b) cooling said stringer tape to set said holes; and (c) injection-molding a series of coupling elements at a time on said tape respectively over said holes.
(a) successively forming a series of holes in and along a marginal edge of a stringer tape including synthetic fiber by ultrasonically melting away tape portions at equal intervals;
(b) cooling said stringer tape to set said holes; and (c) injection-molding a series of coupling elements at a time on said tape respectively over said holes.
2. A method according to claim 1, including the step of scraping said stringer tape off said teeth after said cooling step.
3. A method according to claim 1, said holes being formed addititionally by thrusting said stringer tape at said tape portions.
4. A method of manufacturing a slide fastener stringer, comprising the steps of:
(a) sandwiching a stringer tape including synthetic fiber between an ultrasonically vibrating horn and an endless series of teeth successively pressable against said horn along a marginal edge of said tape to melt away tape portions registering with said teeth to form a series of holes at equal intervals in said marginal edge of the tape;
(b) carrying said stringer tape on said teeth away from said ultrasonically vibrating horn to cool said tape, thereby setting said holes; and (c) injection-molding a series of coupling elements at a time on said tape respectively over said holes.
(a) sandwiching a stringer tape including synthetic fiber between an ultrasonically vibrating horn and an endless series of teeth successively pressable against said horn along a marginal edge of said tape to melt away tape portions registering with said teeth to form a series of holes at equal intervals in said marginal edge of the tape;
(b) carrying said stringer tape on said teeth away from said ultrasonically vibrating horn to cool said tape, thereby setting said holes; and (c) injection-molding a series of coupling elements at a time on said tape respectively over said holes.
5. A method according to claim 1, including the step of scraping said stringer tape off said teeth after said carrying step.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54-168626 | 1979-12-25 | ||
| JP54168626A JPS6058004B2 (en) | 1979-12-25 | 1979-12-25 | Method for manufacturing stringers for slide fasteners |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1168816A true CA1168816A (en) | 1984-06-12 |
Family
ID=15871537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000366814A Expired CA1168816A (en) | 1979-12-25 | 1980-12-15 | Method of manufacturing a slide fastener stringer |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS6058004B2 (en) |
| AU (1) | AU522126B2 (en) |
| BE (1) | BE886636A (en) |
| BR (1) | BR8008442A (en) |
| CA (1) | CA1168816A (en) |
| DE (1) | DE3048713A1 (en) |
| ES (1) | ES8202480A1 (en) |
| FR (1) | FR2472355B1 (en) |
| GB (1) | GB2066143B (en) |
| IT (1) | IT1129490B (en) |
| NL (1) | NL8006754A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6319102A (en) * | 1986-07-11 | 1988-01-26 | 広島化成株式会社 | Production of shoes having double sole |
| US4747895A (en) * | 1986-08-20 | 1988-05-31 | American White Cross Laboratories, Inc. | Continuous ultrasonic perforating system and method |
| WO1996014191A1 (en) * | 1994-11-08 | 1996-05-17 | Minnesota Mining And Manufacturing Company | Method of aperturing thin sheet materials |
| US5879494A (en) * | 1996-09-23 | 1999-03-09 | Minnesota Mining And Manufacturing Company | Method of aperturing thin sheet materials |
| CN103182778B (en) * | 2011-12-30 | 2015-02-25 | 福建浔兴拉链科技股份有限公司 | Circuit control method of rubber press machine, and circuit control device |
| CN112482011B (en) * | 2020-11-09 | 2021-11-30 | 武汉富之文防护用品有限公司 | Auxiliary processing system for non-woven fabric clothing fabric |
-
1979
- 1979-12-25 JP JP54168626A patent/JPS6058004B2/en not_active Expired
-
1980
- 1980-12-08 GB GB8039288A patent/GB2066143B/en not_active Expired
- 1980-12-12 BE BE0/203153A patent/BE886636A/en not_active IP Right Cessation
- 1980-12-12 NL NL8006754A patent/NL8006754A/en not_active Application Discontinuation
- 1980-12-15 CA CA000366814A patent/CA1168816A/en not_active Expired
- 1980-12-16 AU AU65411/80A patent/AU522126B2/en not_active Ceased
- 1980-12-19 BR BR8008442A patent/BR8008442A/en not_active IP Right Cessation
- 1980-12-22 FR FR8027262A patent/FR2472355B1/en not_active Expired
- 1980-12-23 DE DE19803048713 patent/DE3048713A1/en not_active Withdrawn
- 1980-12-23 ES ES498106A patent/ES8202480A1/en not_active Expired
- 1980-12-24 IT IT68989/80A patent/IT1129490B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6058004B2 (en) | 1985-12-18 |
| AU522126B2 (en) | 1982-05-20 |
| BR8008442A (en) | 1981-07-14 |
| GB2066143B (en) | 1984-03-14 |
| BE886636A (en) | 1981-04-01 |
| IT8068989A0 (en) | 1980-12-24 |
| GB2066143A (en) | 1981-07-08 |
| DE3048713A1 (en) | 1981-10-01 |
| ES498106A0 (en) | 1982-02-16 |
| IT1129490B (en) | 1986-06-04 |
| AU6541180A (en) | 1981-07-02 |
| FR2472355B1 (en) | 1985-08-30 |
| NL8006754A (en) | 1981-07-16 |
| FR2472355A1 (en) | 1981-07-03 |
| ES8202480A1 (en) | 1982-02-16 |
| JPS5689917A (en) | 1981-07-21 |
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| MKEX | Expiry |