EP0366747A1 - Procede de fabrication de courroies d'entrainement en forme de collier et courroies d'entrainement en forme de collier ainsi fabriquees - Google Patents
Procede de fabrication de courroies d'entrainement en forme de collier et courroies d'entrainement en forme de collier ainsi fabriqueesInfo
- Publication number
- EP0366747A1 EP0366747A1 EP19890904514 EP89904514A EP0366747A1 EP 0366747 A1 EP0366747 A1 EP 0366747A1 EP 19890904514 EP19890904514 EP 19890904514 EP 89904514 A EP89904514 A EP 89904514A EP 0366747 A1 EP0366747 A1 EP 0366747A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive belt
- plastic
- winding
- thread
- glass fiber
- 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.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims description 5
- 238000004804 winding Methods 0.000 claims abstract description 23
- 239000003365 glass fiber Substances 0.000 claims abstract description 16
- 239000004033 plastic Substances 0.000 claims abstract description 13
- 229920003023 plastic Polymers 0.000 claims abstract description 13
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 239000004760 aramid Substances 0.000 claims abstract description 9
- 229920003235 aromatic polyamide Polymers 0.000 claims abstract description 9
- 229930182556 Polyacetal Natural products 0.000 claims abstract description 7
- 229920002457 flexible plastic Polymers 0.000 claims abstract description 7
- 229920006324 polyoxymethylene Polymers 0.000 claims abstract description 7
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 4
- 238000001125 extrusion Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 3
- 239000011324 bead Substances 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 239000002991 molded plastic Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 241000287531 Psittacidae Species 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000007921 spray Substances 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
- B29D29/00—Producing belts or bands
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G1/00—Driving-belts
- F16G1/28—Driving-belts with a contact surface of special shape, e.g. toothed
Definitions
- the invention relates to a method for producing a spherical cord drive belt, which consists of an endless strand formed by glass fiber reinforcing threads and therefore encapsulated flexible plastic, as well as driver balls molded onto it at regular intervals. Furthermore, the invention relates to a ball cord drive belt produced in this way.
- Spherical cord drive belts of the aforementioned type are known from US Pat. No. 3,540,301, the core threads consisting of glass fiber being extrusion-coated by a polymer material, in particular nylon, and carrier balls molded at regular intervals.
- the glass fiber core threads are to be produced here in accordance with known manufacturing methods in order to achieve the desired embedding.
- Such a known method for the production of ball cord Driving belt is shown in US Pat. No. 3,517,565, in which a strand of finite length provided with a reinforcing core thread is assumed, which is finally joined at its two ends and connected here by plastic fusion.
- the reinforcement strand made of nylon is spliced on at both ends and then connected to one another by one of the numerous drive balls made of plastic material.
- a ball cord drive belt produced by joining its ends in this way has no significant tensile strength.
- a thread is assumed which is wound around a single drum insert and with its free end on the Adjacent winding winding is welded.
- the drum wrapped in this way is then inserted into an open injection mold, in which the plastic forming the actual drive belt strand is injected around the thread winding thus formed.
- the finished drive belt can be removed from the mold. Since the winding roll and thus also the injection mold taking it on must have a large diameter corresponding to the circumference of the drive belt, this requires a considerable amount of material and space.
- the inside of the thread winding is only partially covered by the plastic.
- the invention has for its object to produce a ball-cord drive belt of the type mentioned, which is easy to manufacture and has a greater tensile strength and is therefore particularly suitable for larger or stronger drives.
- this object is achieved in that a thread of a certain length consisting of low-stretch glass fiber is often wound around two winding axes arranged at a distance from one another in the circumference of the drive belt, the thread end winding thus obtained being loosened into a loosened form Injection mold designed in accordance with the desired ball strand is encapsulated therein with flexible plastic.
- the method according to the invention is therefore essential that the glass fiber reinforcement thread is wound around two winding axes located at the distance corresponding to the drive belt circumference and then the core thread strand removed from the two winding axes in a loosened and thus also, for example, in multiple corrugated form can be brought into an injection mold of a correspondingly more compact design, in which the endless winding of the core thread receives its complete plastic encapsulation both inside and outside, the spherical cord drive belt thus produced having great tensile strength.
- the production method according to the invention results in an all-round spray plastic covering of the glass fiber thread winding, that is to say also on the inside thereof.
- the multi-layer wound glass fiber thread advantageously consists of macaw and the plastic to be extrusion-coated from polyacetal.
- a ball cord drive belt manufactured and procured in this way is surprisingly highly stressable. It can also be used for energy-intensive drives instead of standard drive chains.
- Extrusion plastic forming extrudate is not able to slide on the aramid thread windings under the corresponding tensile load.
- a ball cord drive belt designed in this way is characterized above all by the fact that, with sufficient flexibility, it has practically no longitudinal expansion, can also be used for high-energy drives.
- Fig.l shows the top view of the drive belt
- Fig.2 shows a section along the line II-II
- Fig.3 shows a section along the line III-III of Fig.l each in an enlarged view
- the illustrated spherical cord drive belt consists of the endlessly rotating strand 1 and the carrier balls 2 arranged thereon at uniform intervals corresponding to the tooth gap distance of the gears to be used for this purpose embedded, which preferably consists of a multiply wound fine aramid threads, the individual ultra-fine winding threads 4 are shown more clearly in FIGS. 2 and 3.
- Such aramid threads of a certain length are often wrapped around two winding axes arranged at a distance from one another in the desired drive belt circumference, then inserted in a loosened form into an appropriately designed injection mold and overmolded therein with flexible plastic, in particular polyacetal.
- the spherical cord drive belt thus produced, with sufficient flexibility, has a comparatively high tensile strength with only very little longitudinal expansion, so that the drive belt obtained in this way also easily satisfies higher requirements.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
Des courroies d'entraînement en forme de collier peuvent se composer d'un fil sans fin (1) formé par des fibres de verre de renforcement (3) entourées par injection de plastique flexible, ainsi que de perles d'entraînement (2) injectées à des intervalles réguliers avec le plastique. Afin de pouvoir fabriquer aisément de telles courroies présentant une forte résistance à la traction, on enroule un fil (3) composé de fibres de verre à extensibilité réduite et de longueur déterminée plusieurs fois autour de deux axes d'enroulement mutuellement écartés d'une distance correspondant à la circonférence de la courroie d'entraînement, on pose l'enroulement sans fin (3) ainsi obtenu lâchement dans un moule de coulage par injection de forme correspondant au collier que l'on veut obtenir et on l'entoure par injection avec du plastique flexible (1'). Dans les courroies d'entraînement en forme de collier ainsi fabriquées, les fibres de verre (3) enroulées plusieurs fois peuvent se composer d'aramide et la matière plastique (1') qui les entoure peut être du polyacétal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3814704 | 1988-04-30 | ||
| DE19883814704 DE3814704A1 (de) | 1988-04-30 | 1988-04-30 | Kugelschnur-treibriemen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0366747A1 true EP0366747A1 (fr) | 1990-05-09 |
Family
ID=6353298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19890904514 Withdrawn EP0366747A1 (fr) | 1988-04-30 | 1989-04-14 | Procede de fabrication de courroies d'entrainement en forme de collier et courroies d'entrainement en forme de collier ainsi fabriquees |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0366747A1 (fr) |
| DE (1) | DE3814704A1 (fr) |
| WO (1) | WO1989010500A1 (fr) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4020380A1 (de) * | 1990-06-27 | 1992-01-02 | Esjot Antriebstech Gmbh & Co | Verfahren und vorrichtung zum herstellen eines kugelschnur-treibriemens |
| DE4339540C2 (de) * | 1993-11-19 | 2000-05-18 | Keiper Gmbh & Co | Antrieb für eine mechanische Verstelleinrichtung eines Fahrzeugsitzes |
| DK111396A (da) * | 1996-10-09 | 1998-04-10 | Echberg Foderanlaeg As | Transportwire samt fremgangsmåde til fremstilling af sådan transportwire |
| EP3517805B8 (fr) | 2018-01-29 | 2022-04-13 | Auto-Motion Shade Inc. | Chaîne pour un dispositif écran |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1108374A (fr) * | 1954-07-03 | 1956-01-12 | Organe de transmission | |
| US2838946A (en) * | 1954-10-22 | 1958-06-17 | Elmer C Kiekhaefer | Power transmission system |
| FR1160170A (fr) * | 1955-11-07 | 1958-07-08 | Singer Mfg Co | Courroie d'entraînement |
| US3026737A (en) * | 1960-07-22 | 1962-03-27 | Pic Design Corp | Belt transmission system |
| US3517565A (en) * | 1968-01-02 | 1970-06-30 | Roland C Smith | Universal belt drive |
| US3540301A (en) * | 1968-07-01 | 1970-11-17 | Dow Chemical Co | Timing belt |
| DE2227335A1 (de) * | 1971-06-11 | 1973-02-15 | Cigala & Bertinetti S A S Di C | Treibriemen und verfahren zu seiner herstellung |
| CH621177A5 (en) * | 1973-09-01 | 1981-01-15 | Walter Huegin | Device for fastening a spacer cord on the vertical lamellae of a window hanging |
| US4214488A (en) * | 1977-10-27 | 1980-07-29 | Dynaloc Corporation | Positive drive system |
| JPH06192333A (ja) * | 1992-12-25 | 1994-07-12 | Toray Ind Inc | 光学用樹脂の製造方法 |
-
1988
- 1988-04-30 DE DE19883814704 patent/DE3814704A1/de not_active Withdrawn
-
1989
- 1989-04-14 EP EP19890904514 patent/EP0366747A1/fr not_active Withdrawn
- 1989-04-14 WO PCT/DE1989/000228 patent/WO1989010500A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8910500A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1989010500A1 (fr) | 1989-11-02 |
| DE3814704A1 (de) | 1989-11-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19900119 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT |
|
| 17Q | First examination report despatched |
Effective date: 19910205 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19910717 |