BE542359A - - Google Patents
Info
- Publication number
- BE542359A BE542359A BE542359DA BE542359A BE 542359 A BE542359 A BE 542359A BE 542359D A BE542359D A BE 542359DA BE 542359 A BE542359 A BE 542359A
- Authority
- BE
- Belgium
- Prior art keywords
- pressure frame
- heated edge
- edge
- heated
- pressure
- Prior art date
Links
- 239000004809 Teflon Substances 0.000 claims description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 229920001328 Polyvinylidene chloride Polymers 0.000 claims description 2
- 239000003779 heat-resistant material Substances 0.000 claims description 2
- 229920001169 thermoplastic Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000000717 retained Effects 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- 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
- B29C66/84—Specific machine types or machines suitable for specific applications
- B29C66/861—Hand-held tools
-
- 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
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
-
- 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
- B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
- B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
- B29C66/0044—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined using a separating sheet, e.g. fixed on the joining tool
-
- 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
-
- 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
- B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
- B29C66/822—Transmission mechanisms
- B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
-
- 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
- B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
- B29C66/822—Transmission mechanisms
- B29C66/8227—Transmission mechanisms using springs
-
- 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
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8324—Joining or pressing tools pivoting around one axis
-
- 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
- B29C66/812—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
- B29C66/8122—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Treatment Of Fiber Materials (AREA)
Description
<Desc/Clms Page number 1>
EMI1.1
De ui tvincrïug neeft oetrekk:t1!ó .....y gen apparaat voor het met behulp van warmte door een naad aan elkaar verbinden van thermoplastische kunststoffen of daarmede bedekte voorwerpen, in het bijzonder in blad of filmvorm, zoals polyaethyleen pliofilm, saran, e.d.
Dergelijke apparaten bestaan in het algemeen uit een rand, welko onder tussenlegging van de te verbinden bladen of films op een ondergrond wordt gedrukt, waarbij
EMI1.2
de Vtl'h i t tLng van de rand en de duur van hEt draken van vele omstandigheden (,t'li':tnlc0lijlr zijn.
<Desc/Clms Page number 2>
Een probleem hierbij is dat het verhitte kunststof - materiaal aan de verhitte rand blijft plakken, terwijl de naad in verhitte toestand geen krachten op kan nemen en afscheuren door uitwendige belasting in die toestand het effect van de naad illusoir maakt.
De uitvinding beoogt hiervoor een oplossing te geven en daartoe is volgens de'uitvinding om de verhitte rand een in de ruimte'tussen de verhitte rand en de ondergrond tegen veerdruk in beweegbaar drukraam aangebracht.
Volgens de uitvinding is dit drukraam bij voor- keur bespannen met.teflon of een ander hittebestendig mate- riaal, dat geen affiniteit met de te verbinden kunststof- fen vertoont, terwijl de ruimte tussen het drukraam en de verhitte rand omgeven is door een met het drukraam verbon- den scherm, van teflon of ander materiaal.-
Volgens de uitvinding kunnen nog openingen. aan- gebracht zijn, waardoorheen koellucht voor de bespanning van het drukraam en voor de verhitte rand door de beweging van het drukraam onafhankelijk van de verhitte rand wordt aangezogen.
De uitvinding wordt hieronder nader toegelicht met behulp'van een tekening van een uitvoeringsvoorbeeld volgens de uitvinding.
Fig. 1 toont een handapparaat in langsdoorsnede;
Fig. 2 toont de kop van het apparaat, wanneer de verbinding van de bladen tot stand komt ;
Fig. 3 toont dezelfde kop tijdens het koelen van de naad;
Fig. 4 toont een vooraanzicht van de kop in ge- opendé stand.
In de tekening-'vormt een bovenarm 1 met een onder-
<Desc/Clms Page number 3>
EMI3.1
arm 2 met behulp van een scharnier en jen vc'jr 01J]'] nor- ii:ai;1 openstaande t 4n. Op de V'il1 het scrurnj er :cí';ekcerwrae einde van de armen zijn resp. @en bovenlcop 5 en een onderkop 6 aangebracht. In de bovenkop 5 bevindt; Zich een met behulp
EMI3.2
van een electrisch verhittingselement 7 te verwarli1c:n in dwarsdoorsnede T-vormige uitwisselbare verhitte rand 8. In de @@erkop 6 is een met teflon beklede ondergrond 9 aange- bracht tegenover genoemde rand 8 maar met een grotere breed- te.
Tussen beide armen is een om het .scharnier 3 draaibare beugel 10 aangebracht, welke een drukraam 11 draagt dat ruim om de verhitte rand 8 past. Het uiteinde van de beugel 10 is omgezet tot een veer 12, die het drukraam 11 op een afstand van de bovenkop 5 tracht te houden. Deze af- stand wordt echter bepaald door een scherm 13 van teflon, .dat een voortzetting is van de bespanning 14 van het druk- raam, en waarin openingen 15 zijn aangebracht, waardoorheen met de rand 8 verbonden pennen 16 steken.
Wanneer de tang open staat wordt het scherm 13 dus uitgespannen en omgeeft de verhitte rand. Bij het inbrengen van te verbinden bladen 17 en 18. kan dus nooit door een fout liet materiaal direct met de rand 8 in aanraking komen en daardoor worden beschadigd.
Zodra de bladen 17 en 18 op de ondergrond 9 zijn gelegd, worden de armen 1 en 2 met de hand tegen de druk van de veer 4 in naar elkaar toe bewogen. Eerst komt daarbij het drukraam 11 met de bespanning 13 met ae bladen in con- tact en de veer 12 draagt hierbij zorg voor een vlakke aan- drukking van de bladen op de ondergrond. Wanneer de bladen een deel van een gevuld zakje vormen kan op dit moment, overigens .afhankelijk van de veerdrulc, het zakje losgelaten
<Desc/Clms Page number 4>
worden omdat het op de ondergrond 9 geklemde drukraam 11 de gewichtsbelasting overneemt.
Bij verder samendrukken van de armen 1 en 2 komt de kop 5 met de verhitte rand 8 naar beneden, waarbij het scherm 13 grotendeels 'binnen deze kop verdwijnt en de pennen
16 in de openingen 15 bewegen. Zodra de verhitte rand 8 op de bespanning 14 drukt wordt de warmte via het teflon op de te verbinden bladen overgebracht en smelten deze aaneen tot een naad.
Nadat de verbinding tussen de bladen is gemaakt dient de naad te worden'gekoeld teneinde belasting op te kunnen nemen. Wanneer nu door net opheffen van de druk op de armen de koppen van elkaar bewegen komt eerst de rand 8 los van de bespanning 14 en ontstaat binnen de door het scherm 13 afgesloten ruimte een onderdruk. Doordat er nu openingen 15 in dit scherm zijn aangebracht kan de buiten- lucht met grote snelheid in de ruimte treden en strijkt daar- bij langs de. bespanning 14 en langs de verhitte rand 8.'
De bespanning 14 wordt dus snel gekoeld en daarmede de nog steeds door het drukraam 11 vastgehouden bladen met ae hete zwakke naad.
De door ae luchtstroom snel gekoelae en verstijven- de naad kan dan losgelaten worden en bij het verder openen van de koppen 5 en 6 wordt door de pennen 16 het drukraam 11 van de bladen gelicht en de nu door de naad stevig met el- kaar verbonden bladen komen vrij.
De door de openingen '15 toestromende lucht strijkt eveneens langs de verhitte rand 8 en.neemt daarbij de warmte . op; die niet'meer door de bladen opgenomen kan worden, zodat voor oververhitting van de rand minder te vrezen valt en de verwarming niet men behulp van een intermitterend werkend
<Desc/Clms Page number 5>
verwarmingselement 7 maar met een veel eenvoudiger contin@ werkend element kan plaatsvinden.
Uiteraard kan de vinding niet alleen worden toc- gepast bij een handapparaat waarbij een rechte naad worat gevormd, maar ook bij grotere apparaten waarbij anders ge- vormde of een groot aantal naden tegelijk worden aangebracht.
Teneinde aan de wisselende behoefte aan te kunnen passen is overigens ook in dit getoonde eenvoudige apparaat de ver- hitte rand 8 uitwisselbaar bevestigd en door een anders geprofileerde te vervangen.
<Desc / Clms Page number 1>
EMI1.1
The product also has a useful device for connecting thermoplastics or objects coated therewith by means of heat through a seam, in particular in sheet or film form, such as polyaethylene pliofilm, saran. , ed
Such devices generally consist of an edge, which is printed on a substrate with the sheets or films to be joined interposed, whereby
EMI1.2
the Vtl'h i tLng of the edge and the duration of the dragons of many circumstances (, t'li ': tnlc0lijlr be.
<Desc / Clms Page number 2>
A problem here is that the heated plastic material sticks to the heated edge, while the seam cannot absorb forces in the heated state and tearing off by external load in that state makes the effect of the seam illusory.
The object of the invention is to provide a solution for this, and according to the invention, according to the invention, a pressure frame is arranged around the heated edge in the space between the heated edge and the substrate against spring pressure.
According to the invention, this pressure frame is preferably covered with teflon or another heat-resistant material, which shows no affinity with the plastics to be joined, while the space between the pressure frame and the heated edge is surrounded by a pressure frame bonded screen, made of Teflon or other material.
Openings are still possible according to the invention. through which cooling air for the covering of the pressure frame and for the heated edge is drawn in by the movement of the pressure frame independently of the heated edge.
The invention is further elucidated below with the aid of a drawing of an exemplary embodiment according to the invention.
FIG. 1 shows a hand-held device in longitudinal section;
FIG. 2 shows the head of the device when the connection of the blades is made;
FIG. 3 shows the same head during the cooling of the seam;
FIG. 4 shows a front view of the head in the open position.
In the drawing-'forms an upper arm 1 with a lower
<Desc / Clms Page number 3>
EMI3.1
arm 2 with the help of a hinge and jen vc'jr 01J] '] nor- ii: ai; 1 open t 4n. On the V'il1 the scrurnj er: cí '; ekcerwrae end of the arms are resp. @ and upper head 5 and a lower head 6 are provided. Located in the upper head 5; Themselves a using
EMI3.2
of an electric heating element 7 to be confused in cross-section T-shaped exchangeable heated edge 8. In the @@ er head 6, a Teflon-coated substrate 9 is arranged opposite said edge 8 but with a larger width.
A bracket 10, which is rotatable about the hinge 3, is arranged between the two arms and carries a pressure frame 11 which fits comfortably around the heated edge 8. The end of the bracket 10 is converted into a spring 12 which tries to keep the pressure frame 11 at a distance from the upper head 5. However, this distance is determined by a screen 13 of Teflon, which is a continuation of the covering 14 of the pressure frame, and in which openings 15 are provided through which pins 16 connected to the edge 8 protrude.
When the tongs are open, the screen 13 is thus stretched and surrounds the heated edge. Thus, when inserting sheets 17 and 18 to be joined, material can never come into direct contact with the edge 8 through an error and be damaged as a result.
As soon as the blades 17 and 18 have been placed on the base 9, the arms 1 and 2 are moved towards each other by hand against the pressure of the spring 4. First, the pressure frame 11 comes into contact with the covering 13 with the blades, and the spring 12 ensures that the blades are pressed flat on the ground. When the leaves form part of a filled bag, at this moment, depending on the force of the spring, the bag can be released.
<Desc / Clms Page number 4>
because the pressure frame 11 clamped on the base 9 takes over the weight load.
On further compression of the arms 1 and 2, the head 5 with the heated edge 8 comes down, the screen 13 disappearing for the most part within this head and the pins
16 move in the openings 15. As soon as the heated edge 8 presses on the covering 14, the heat is transferred via the Teflon to the sheets to be joined and these fuse together to form a seam.
After the connection between the blades has been made, the seam must be cooled in order to take load. When the heads now separate from each other by just releasing the pressure on the arms, the edge 8 is first released from the covering 14 and an underpressure is created within the space closed off by the screen 13. Because openings 15 have now been made in this screen, the outside air can enter the room at great speed and sweeps past the room. spanning 14 and along the heated edge 8. '
The covering 14 is thus rapidly cooled and with it the sheets still retained by the pressure frame 11 with a hot, weak seam.
The seam, which is rapidly cooled and stiffened by the airflow, can then be released and when the heads 5 and 6 are opened further, the pressure frame 11 is lifted from the blades by the pins 16 and the pressure frame 11 is now firmly connected to each other by the seam. blades are released.
The air flowing in through the openings 15 likewise streaks along the heated edge 8, taking the heat. on; which can no longer be absorbed by the blades, so that there is less to fear of the edge overheating and the heating is not effected by means of an intermittent
<Desc / Clms Page number 5>
heating element 7, but with a much simpler continuous operating element.
Of course, the invention can be applied not only to a handheld device in which a straight seam is formed, but also to larger devices in which differently shaped or a large number of seams are applied simultaneously.
In order to be able to adapt to changing requirements, the heated edge 8 is also interchangeably fastened in this simple device shown and replaced by a differently profiled one.
Claims (1)
Publications (1)
Publication Number | Publication Date |
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BE542359A true BE542359A (en) |
Family
ID=171058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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BE542359D BE542359A (en) |
Country Status (1)
Country | Link |
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BE (1) | BE542359A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4565916A (en) * | 1981-11-25 | 1986-01-21 | Matsushita Electric Works, Ltd. | Electric hair curling iron with rotatable power cord |
US5142123A (en) * | 1990-04-12 | 1992-08-25 | Chou Shu Hui | Electric heat sealer energizable by internal battery set or external AC adapter |
FR2690377A1 (en) * | 1992-04-22 | 1993-10-29 | Windmoeller & Hoelscher | Device for welding strips of sheet of thermoplastic material. |
-
0
- BE BE542359D patent/BE542359A/nl unknown
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4565916A (en) * | 1981-11-25 | 1986-01-21 | Matsushita Electric Works, Ltd. | Electric hair curling iron with rotatable power cord |
US5142123A (en) * | 1990-04-12 | 1992-08-25 | Chou Shu Hui | Electric heat sealer energizable by internal battery set or external AC adapter |
FR2690377A1 (en) * | 1992-04-22 | 1993-10-29 | Windmoeller & Hoelscher | Device for welding strips of sheet of thermoplastic material. |
BE1006317A5 (en) * | 1992-04-22 | 1994-07-19 | Windmoeller & Hoelscher | Sealing device sheets synthetic thermoplastic. |
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