GB2053083A - Heating plate for joining together parts of thermoplastic material - Google Patents

Heating plate for joining together parts of thermoplastic material Download PDF

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Publication number
GB2053083A
GB2053083A GB7922164A GB7922164A GB2053083A GB 2053083 A GB2053083 A GB 2053083A GB 7922164 A GB7922164 A GB 7922164A GB 7922164 A GB7922164 A GB 7922164A GB 2053083 A GB2053083 A GB 2053083A
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GB
United Kingdom
Prior art keywords
heating plate
parts
joining together
thermoplastic material
elevation
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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.)
Granted
Application number
GB7922164A
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GB2053083B (en
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Tudor AB
Original Assignee
Tudor AB
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Filing date
Publication date
Application filed by Tudor AB filed Critical Tudor AB
Publication of GB2053083A publication Critical patent/GB2053083A/en
Application granted granted Critical
Publication of GB2053083B publication Critical patent/GB2053083B/en
Expired legal-status Critical Current

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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
    • B29C66/81—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
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • 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
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • B29C65/2007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by the type of welding mirror
    • B29C65/203—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by the type of welding mirror being several single mirrors, e.g. not mounted on the same 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
    • B29C66/01—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
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1226—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least one bevelled joint-segment
    • B29C66/12261—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least one bevelled joint-segment the two joint-segments being bevelled, e.g. the two joint-segments forming a V
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
    • B29C66/12463—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being tapered
    • B29C66/12464—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being tapered being V-shaped
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • 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
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • B29C65/2092—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" and involving the use of a facer
    • 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
    • B29C66/81417—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 being V-shaped
    • 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
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

A heating plate 1 for joining together parts 3, 4 formed from a thermoplastic material by heat sealing comprises one planar contact surface 6 and one contact surface 7 with an elevation or rib 2 thereon, by means of which a groove is obtained in the portion 5 of the part 4 heated against the surface 7. The groove serves to guide the part 3 to be joined thereto to its central point and also serves to collect molten material, so that a strong join is obtained. In cross-section, the elevation 2 may be triangular, as shown, or part-circular. The heating plate of the invention is of particular use in the joining of lids to accumulator cells and batteries and may comprise two parts (1a, 1b, Fig. 1) which form an open rectangle. <IMAGE>

Description

SPECIFICATION Heating plate for joining together parts of thermoplastic material The present invention concerns a heating plate for use in joining together parts formed from a thermoplastic material by means of heat sealing. Heat sealing implies that the surfaces which are to be joined are fused by direct contact with a hot heating plate. The heat-sealing method is especially suitable for joining together thinwalled thermosplastic parts, for example, vessels and lids. In certain applications it can also be used for joining together tubular parts. A special area of application is the joining of vessels and lids to electrical accumulator cells and batteries, which are increasingly made of polyethylene and polypropylene.The advantages of the present invention are particularly apparent in an application of this kind, in which a lid with a welding surface of 2 to 5 mm in width is attached to a vessel wall with a thickness of about 1 to 3 mm.
Using heat sealing, heat is transferred from the heated plate to the plastic parts which are to be joined together. In this connection one can distinguish between a low temperature process and a high temperature process. This means in the case of polypropylene that with the low temperature process the temperature of the heating plate does not exceed 200 C, whereas it exceeds 200on with the high temperature process. In the case of polyethylene the boundary lies some ten or more degrees lower, and in the case of other thermoplastic materials this boundary must be adapted to their qualities. The low temperature process involves a relatively long contact time between the heating plate and the plastic material, and in the case of material with a wall thickness of several mm., the contact time will usually be at least 10 seconds.In order to prevent the plastic material from sticking to the heating plate, the heating plate is provided with a special outer layer, for example, of polytetrafluoroethylene. With the high temperature process, the contact time is usually under 5 seconds, provided the same conditions prevail. Because of the high tempera.
ture of the heating plate, the special coating of its surfaces is unnecessary, as any sticky material is burned off directly. With the high temperature process, melting or softening of the plastic material is obtained to a considerably lesser depth than with the low temperature process.
In connection with the joining together of a vessel and a lid, where the vessel walls have only a slight thickness (0.53 mm) in relation to its depth, difficulties may arise in adjusting the vessel's wall against the lid in the intended manner, along its entire length. This may be partly due to the fact that the vessel wall itself is not sufficiently straight and partly due to the fact that the wall changes its form and loses its rigidity because of the heating.
With the previously mentioned application to batteries and accumulator cells, it has been attempted to solve this problem by placing a number of guiding fins along the edges of the lid on which the welding against the vessel is to occur. The welding edges on the lid generally consist of elevations, 2 to 3 mm wide, from the level surface. Against these the edges of the battery walls are fixed, the walls generally having a thickness of 1 to 2 mm. As the guiding fins must be placed wholly outside the welding edges of the lid, only a rough control or guiding of the vessel wall is obtained by means of the fins. Between the guiding fins relatively great deviations may occur in the adjustment between the vessel and the lid.
Another problem is the risk of so-called cold welding, which arises when the parts to be joined together are compressed too strongly.
In this connection it may found that all of the fused or molten material is pressed against the sides and outside the area where the joining is to take place. Because of remnants of molten material and the softness in the underlying material, joining together of the parts is usually obtained in spite of this. The material, however, acquires poor qualities and endures only very slight mechanical stress.
We have now developed a heating plate and a method of using the heating plate, which overcomes the aforementioned problems and which provides a joint of the desired qualities.
Accordingly the present invention provides a heating plate for use in joining together parts of a thermoplastic material by means of heat sealing, whereby the surfaces that are to be joined are fused by direct contact with the heating plate, which heating plate has one level contact surface and one contact surface with an elevation thereon, by means of which a groove is obtained in the thermoplastic part heated against the surface.
The elevation preferably is of triangular cross-section, the triangle having a base which is greater than its height.
The present invention will be further described in detail below with reference to the accompanying drawings, in which:~ Figure 1 shows a heating plate according to the invention; Figure 2 shows a cross-section through the heating plate of Fig. 1 and parts a vessel and a lid which are to be joined together; Figure 3 shows the parts of the vessel and lid after the union.
The heating plate illustrated in Fig. 1 consists of two parts, 1A and 1 B. Together these two parts form an open rectangle. On the upper side of the rectangle there is an elevation 2 of triangular cross-section. The eleva tion is placed in such a way on the heating plate that its central line coincides with the central line of the plastic part to be heated.
Fig. 2 shows a cross-section through the same heating plate and parts of a vessel (3) and a lid (4) which are to be joined together. The joining surface (5) of the lid is wider than the corresponding surface of the vessel, and in this case one therefore chooses to turn the joining surface of the lid against or towards the elevation 2 of the heating plate. A partial melting down of the lid surface occurs and, there is formed in it a notch or groove which serves to guide the vessel's wall toward the central point of the groove as well as to collect the molten material, so that a strong weld join is obtained. Fig. 3 shows the vessel and the lid parts after being joined together, the seam of join between the two parts is indicated by a dotted line.
The invention is not limited, of course, to the abovementioned specific embodiment.
The elevation on the heating plate, for example, may have a different cross-section, such as a segment of a circle or a triangle with a different angle. The heating plate of the invention can also be combined with a lid which is provided with guiding fins to correct greater deviations between the vessel and the lid. The surface of the heating plate, which in the above-mentioned example is level, may have notches or grooves with a cross-section corresponding to the elevations.

Claims (7)

1. A heating plate for use in joining together parts of a thermoplastic material by means of heat sealing, whereby the surfaces that are to be joined are fused by direct contact with the heating plate, which heating plate has one level contact surface and one contact surface with an elevation thereon, by means of which a groove is obtained in the thermoplastic part heated against the surface.
2. A heating plate as claimed in claim 1 wherein the elevation is of triangular crosssection.
3. A heating plate as claimed in claim 2 wherein the triangle has a base which is greater than its height.
4. A heating plate as claimed in any one of the preceding claims which is in the form of an open rectangle.
5. A heating plate as claimed in claim 1 substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
6. A method of joining together parts of a thermoplastic material, which method comprises fusing the surfaces which are to joined by direct contact with the surfaces of a heating plate as claimed in any one of the preceding claims and bringing the fused surfaces together to form a join therebetween.
7. A method as claimed in claim 6 substantially as hereinbefore described.
GB7922164A 1979-06-18 1979-06-26 Heating plate for jiuning together parts of thermoplastic material Expired GB2053083B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792924930 DE2924930A1 (en) 1979-06-18 1979-06-18 DEVICE FOR WELDING CONNECTING PARTS THAT ARE MADE OF THERMOPLASTIC MATERIAL IN THE WAY OF MIRROR WELDING

Publications (2)

Publication Number Publication Date
GB2053083A true GB2053083A (en) 1981-02-04
GB2053083B GB2053083B (en) 1983-07-20

Family

ID=6073701

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7922164A Expired GB2053083B (en) 1979-06-18 1979-06-26 Heating plate for jiuning together parts of thermoplastic material

Country Status (2)

Country Link
DE (1) DE2924930A1 (en)
GB (1) GB2053083B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113540495A (en) * 2021-07-09 2021-10-22 刘学军 Flow frame structure of flow battery and side surface packaging method thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5188697A (en) * 1987-03-18 1993-02-23 Agru Alois Gruber Gmbh Process and device for welding of tubular plastic parts
DE3708705A1 (en) * 1987-03-18 1988-10-06 Gruber Alois & Sohn Agru METHOD AND DEVICE FOR WELDING TUBULAR PLASTIC PARTS
DE10059452B4 (en) * 2000-11-30 2004-03-11 Kunststoff-Zentrum in Leipzig gemeinnützige Gesellschaft mbH Method and device for producing a separation effect on heating element welding tools

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1779103A1 (en) * 1968-07-06 1971-08-19 Ver Deutsche Metallwerke Ag Process for welding plastic bodies and the resulting weld seam

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113540495A (en) * 2021-07-09 2021-10-22 刘学军 Flow frame structure of flow battery and side surface packaging method thereof

Also Published As

Publication number Publication date
DE2924930A1 (en) 1981-01-22
GB2053083B (en) 1983-07-20

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