DE844063C - Welding of plastics - Google Patents
Welding of plasticsInfo
- Publication number
- DE844063C DE844063C DEF2808D DEF0002808D DE844063C DE 844063 C DE844063 C DE 844063C DE F2808 D DEF2808 D DE F2808D DE F0002808 D DEF0002808 D DE F0002808D DE 844063 C DE844063 C DE 844063C
- Authority
- DE
- Germany
- Prior art keywords
- plastic
- plastics
- welding
- ultra
- seams
- 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
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
- 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
- B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
- B29K2711/12—Paper, e.g. cardboard
Description
Schweißen von Kunststoffen Das Schweißen von thermoplastischen Kunststoffen begegnet im Vergleich zu dem von Metallen deshalb so großen Schwierigkeiten, weil die Kunststoffe ihrer Natur nach schlechte Wärmeleiter sind, die Schweißwärme also nur sehr langsam hinein geleitet werden kann. Man hat sich dadurch zu helfen gewußt, daß man Schweißnähte in viele kleine Raupen unterteilte und diese aus dünnen, von außen erwärmten Kunststoffstäbchen bildete. Es ist aber unmöglich, auf diese Weise große Flächen zweier Kunststoffkörper zuverlässig miteinander zu verschweißen. Es wurde nun gefunden, daß diese Aufgabe in einwandfreier Weiße gelöst wird, wenn die für die Überführung der Kunststoffe in plastischen schweißfähigen Zustand erforderliche Erwärmung durch Ultrakurzwellen erfolgt, denn diese haben die Fähigkeit, beim Durchstrahlen von Körpern in deren Innern wie auch an ihren Oberflächen Wärme zu erzeugen. Es ist also nur nötig, die zu verschweisenden Körper aus Kunststoff mit den zu verbindenden Flächen aufeinanderzulegen und zu durchstrahlen, wobei zweckmäßig nach Erreichen der nötigen Temperatur ein gewisser Druck ausgeübt wird, der die Verbindung der Körper miteinander bewirkt. So werden z. B. starke Platten aus Kunststoff benötigt, die aus dünnen, aus dem Walzvorgang stammenden Lamellen zusammenzaschweißen sind. Man versuchte das bisher auf Pressen mit geheizten Platten und kam, trotzdem man diese lange auf die zwischen ihnen liegenden Stapel von Kunst- stofflareellen einwSiirh elt zu keinem zuverlässi: gen Ergebnis. Mit Ultrakurzwelle'n gelingt die Durchwärmung wesentlich schneller und völlig zuverlässig, weil die Strahl gleichzeitig jede einzelne der Lamellen, dabei untereinander noch völlig gleichmäßig, erwärmen. Wärmeverluste durch Abstrahlung können dadurch vermieden werden, daß man die Elektroden als die am meisten hiervon tetroffenen Teile mit normalen und bekannten Mitteln heizbar macht und/oder isoliert. Ultrahinwellen bieten aber auch Vorteile beim Schweißen von Nähten. Statt sie, wie oben geschildert, aus einzelnen Schweißstäbchen zu bilden, ist es möglich, die Nähte aus Überlappungen zu bilden, diese mit beiderseitig angelegten Elektroden zu durchstrahlen und den gedoppelten Werkstoff nach Erreichen des plastischen Zustandes auf einfache Materialstärke zusammenzudrücilcen oder die Nähte aus beiderseits ausgeschärften Teilen zu bilden und diese dann mittels der beiden Elektroden zu verschweißen. Die Elektroden können zu diesem Zweck handbeweglich ausgebildet sein. Es wurde weiter festgestellt, daß sich nach dem geschilderten Verfahren nicht nur Kunststoffteile gleicher Art miteinander verschweißen 1 passen, sondern auch Teile aus Sunststoffen verschiedener Art, und daß man auf diese Weise Teile aus thermoplastischem Kunststoff mit Teilen aus beliebigem anderem Werkstoff, wie Holz oder Metall, verbinden kann, vor*usgesetzt, daß der Kunststoff in erwärmtem Zustand die erforderliche Adhäsion an dem anderen Werkstoff aufweist.Welding of plastics The welding of thermoplastics encounters great difficulties compared to that of metals because By their nature, plastics are poor conductors of heat, i.e. the heat of welding can only be fed into it very slowly. You knew how to help yourself that one divided weld seams into many small beads and these from thin, of outside heated plastic rods formed. But it is impossible that way Reliably weld large areas of two plastic bodies together. It it has now been found that this problem is solved perfectly if the required for the transformation of the plastics into a plastic, weldable state Heating by ultra-short waves takes place, because these have the ability to radiate through to generate heat from bodies inside as well as on their surfaces. It it is only necessary to connect the plastic body to be welded to the one to be connected Place surfaces on top of each other and irradiate them, which is useful after reaching the necessary temperature a certain pressure is exerted that the connection of the Body causes each other. So z. B. strong plastic sheets are required, which are welded together from thin lamellas from the rolling process. Up until now you tried to do this on presses with heated plates and came anyway this long on the stacks of art fabric fairies This does not lead to a reliable result. With ultra-short waves that succeed Heating through much faster and completely reliable, because the beam is simultaneous Heat each of the lamellas completely evenly among themselves. Heat losses through radiation can be avoided by removing the electrodes than the parts most affected by it by normal and known means heatable and / or insulated. However, ultra-high waves also offer advantages in welding of seams. Instead of forming them from individual sweat sticks, as described above, it is possible to form the seams from overlaps, these with applied on both sides To irradiate electrodes and the doubled material after reaching the plastic To compress the state to a simple material thickness or the seams from both sides to form skived parts and then to close them by means of the two electrodes weld. For this purpose, the electrodes can be designed so that they can be moved by hand. It was further found that after the process described, not only Weld plastic parts of the same type to one another 1, but also parts made of plastics of various kinds, and that in this way parts made of thermoplastic Connect plastic with parts made of any other material, such as wood or metal can, provided that the plastic has the required adhesion when heated on the other material.
PATENTANSPROCHE: I. Verfahren zum Verschweißen von thermoplastischen Kunststoffen, dadurch gekennzeichnet, daß die zu verschweißenden Kunststoffkörper aufeinandergelegt und durch Ultrakurzwellen gleichzeitig durch denselben Strahlengang so erwärmt werden, daß sie in einen plastischen, schweiß fähigen Zustand geraten. PATENT CLAIM: I. Process for welding thermoplastic materials Plastics, characterized in that the plastic bodies to be welded placed on top of one another and simultaneously through the same beam path by ultra-short waves be heated so that they get into a plastic, weldable state.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF2808D DE844063C (en) | 1943-08-29 | 1943-08-29 | Welding of plastics |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF2808D DE844063C (en) | 1943-08-29 | 1943-08-29 | Welding of plastics |
Publications (1)
Publication Number | Publication Date |
---|---|
DE844063C true DE844063C (en) | 1952-07-17 |
Family
ID=7083487
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEF2808D Expired DE844063C (en) | 1943-08-29 | 1943-08-29 | Welding of plastics |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE844063C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE949991C (en) * | 1952-07-29 | 1956-09-27 | Walter Kunik | Closure for container with snap-on lid and method and device for closing the container provided with it |
DE1132327B (en) * | 1955-10-06 | 1962-06-28 | Gen Motors Corp | Process for the production of lining material |
DE1279320B (en) * | 1963-11-12 | 1968-10-03 | Herfurth Gmbh | Ultrasonic welding device for welding thermoplastics |
-
1943
- 1943-08-29 DE DEF2808D patent/DE844063C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE949991C (en) * | 1952-07-29 | 1956-09-27 | Walter Kunik | Closure for container with snap-on lid and method and device for closing the container provided with it |
DE1132327B (en) * | 1955-10-06 | 1962-06-28 | Gen Motors Corp | Process for the production of lining material |
DE1279320B (en) * | 1963-11-12 | 1968-10-03 | Herfurth Gmbh | Ultrasonic welding device for welding thermoplastics |
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