EP4005339A1 - KONTAKT-SCHWEIßWERKZEUG UND VERFAHREN ZUM BETREIBEN DESSELBEN - Google Patents
KONTAKT-SCHWEIßWERKZEUG UND VERFAHREN ZUM BETREIBEN DESSELBENInfo
- Publication number
- EP4005339A1 EP4005339A1 EP19752918.3A EP19752918A EP4005339A1 EP 4005339 A1 EP4005339 A1 EP 4005339A1 EP 19752918 A EP19752918 A EP 19752918A EP 4005339 A1 EP4005339 A1 EP 4005339A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating element
- welding tool
- contact
- heating
- contact welding
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/0033—Heating devices using lamps
-
- 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
- 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
- B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
- B29C65/245—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool the heat transfer being achieved contactless, e.g. by radiation
-
- 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
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/0033—Heating devices using lamps
- H05B3/0038—Heating devices using lamps for industrial applications
- H05B3/0057—Heating devices using lamps for industrial applications for plastic handling and treatment
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
-
- 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
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
- B29C65/60—Riveting or staking
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/017—Manufacturing methods or apparatus for heaters
Definitions
- the present invention relates to a contact welding tool which has at least one heating element provided for contacting a workpiece and at least one heating source for heating the heating element.
- the present invention also relates to a method for operating a contact welding tool, in which a heating element of the contact welding tool is heated and then the heating element is brought into contact with a workpiece to be reshaped.
- the present invention is particularly useful for hot riveting, e.g., plastic rivets.
- thermoplastics which have been manufactured as milled parts from metal such as aluminum, aluminum-bronze alloy, brass, steel or stainless steel.
- Heating cartridges with electrical resistance heating elements are mounted in these milled parts, the heat of which is transferred to the respective milled part through contact.
- the heating of the heating element can disadvantageously take a long time. Heating times of up to an hour to reach temperatures of over 300 ° C are not uncommon.
- One object of the invention is to use means that are as simple as possible in terms of construction
- contact welding tool which is characterized on the one hand by a short heating time and on the other hand also by rapid cooling.
- the contact welding tool can in particular be suitable for plasticizing and reshaping thermoplastics.
- a contact welding tool has at least one heating element provided for contacting a workpiece and at least one heating source for heating the heating element, at least one heating source being an IR radiation source emitting infrared (IR) radiation in the short-wave infrared range.
- IR infrared
- the use of short-wave IR radiation as a heat source for warming the heating element has the advantage of high efficiency, high energy density and responsive controllability.
- a cycle or cycle time reduction can advantageously be achieved through faster heating and faster cooling of heating elements, for example with hot contact riveting.
- Another advantage is that a reduction in energy consumption can be achieved by reducing the mass and improving the efficiency of heating elements.
- An expansion of the suitability of hot contact riveting for semi-crystalline materials e.g. semi-crystalline high-performance polymers such as polyamides, etc.
- the IR radiation source or IR radiator is in particular set up (that is, designed and arranged) to heat the heating element to an operating temperature that is sufficient for joining a workpiece.
- the heating element has at least one contact set up which is intended to be brought into contact with a region of a workpiece to be reshaped by the action of heat.
- the heating element can be designed as a shaping body. It can also be referred to as a forming tool.
- the contact welding tool can therefore have one or more heating elements. At least one IR radiation source can be assigned to each heating element.
- the heating element can be heated to an operating temperature of 150 ° C. or more, in particular of 200 ° C. or more, in particular of 250 ° C. or more, in particular of 300 ° C. or more, by means of the assigned at least one heating source .
- the heating element can be moved towards the workpiece and pressed onto it, or vice versa. This can be done manually or automatically. If necessary, the workpiece can be reshaped at the same time, for example to create a non-positive connection between two workpieces, as is known from the riveting of thermoplastics, for example.
- two or more thermoplastic workpieces melted by means of the contact welding tool can be joined to one another by a press stroke following the heating, as is known e.g. from hot element welding.
- the heating source is an IR radiation source which emits short-wave infrared radiation in a wavelength range between 0.78 pm and 3.0 pm. This wavelength range is also referred to as the NIR range, so that the IR heating source can also be referred to as a NIR radiation source or NIR radiator.
- the IR radiation source predominantly in the NIR wavelength range (eg with a power component of 50% or more, in particular 70% or more, in particular 80% or more), specifically only in the NIR wavelength range, useful IR radiation emitted.
- the heating source is an IR-A heating source, that is to say an IR radiation source emits infrared radiation in the IR-A wavelength range between 0.78 square meters and 1.4 square meters.
- the use of the IR-A range is characterized by a particularly high degree of efficiency, a particularly high energy density and particularly responsive controllability.
- the IR radiation source predominantly in the IR-A wavelength range (e.g. with a power component of 50% or more, in particular 70% or more, in particular 80% or more), especially only in the IR-A wavelength range, IR radiation emitted.
- the IR radiation source can be a point-like or flat heating source radiating IR radiation.
- the heating element that can be heated by means of the IR radiation source can be manufactured as a turned part, milled part, sintered part, pressed part or by means of other shaping processes.
- the heating element can be made of metal or of another highly thermally conductive and thermally resistant material such as ceramic, etc.
- metal for example, aluminum, brass or steel can be used as metals.
- V2A steel is particularly advantageous.
- the heating element has a thin-walled area (hereinafter referred to as "deformation area” or base without loss of generality), which has at least one contact surface on the front for contacting the workpiece and on the rear by means of the IR radiation source with IR Radiation can be irradiated.
- deformation area or base without loss of generality
- the deforming area has a metal sheet, in particular as a basis for at least one contact projection.
- a wall thickness of the metal sheet is advantageously in the range [0.5 mm; 3 mm], especially in the [0.75 mm; 2 mm]. This enables a sufficiently high level of stability, while a heat capacity and thus an inertia during heating and cooling is kept low.
- the contact welding tool has at least one cooling device for cooling the heating element. This has the advantage that the heating element can be actively cooled and consequently can be cooled particularly quickly. This enables particularly fast cycle times when using the contact welding tool.
- the cooling device is set up to apply cooling medium to the heating element.
- the cooling medium can be gaseous and / or liquid cooling medium, e.g. compressed air, dry ice, cooled nitrogen, etc.
- the cooling device can have at least one Peltier element, etc., which is in particular thermally connected to the heating element.
- One embodiment is that between the IR radiant heater or its IR emission surface of the IR radiant heater and the heating element there is an intermediate space that can be acted upon by a cooling medium.
- the heating element can be cooled particularly quickly using inexpensive means. Particularly rapid cooling can be achieved especially in that the heating element represents a wall of the intermediate space.
- a rear side of the heating element facing away from the contact areas can represent a wall of the space.
- the IR radiant heater is thermally isolated from the space, e.g. by means of an IR-permeable window. In this way, thermal stress on the IR radiant heater is advantageously reduced, in particular in relation to cyclical thermal alternating stresses.
- the cooling space is designed as a flow space with at least one inlet opening for the cooling medium and at least one outlet opening for the cooling medium.
- the flow space can otherwise be sealed.
- the object is also achieved by a method for operating a contact
- a heating element of the contact welding tool is heated by means of short-wave infrared radiation and then - The heating element is brought into contact with a workpiece to be formed.
- the method can be designed analogously to the contact welding tool and produces the same advantages.
- the heating element can be heated by means of NIR radiation, especially IR-A radiation.
- the heating element when it is brought into contact with the workpiece to be reshaped, is pressed against the workpiece. This means that the heating element can also be used as a forming tool.
- the workpiece is made of plastic, at least in its intended contact area with the contact welding tool, in particular of thermoplastic, possibly partially crystalline, plastic.
- the heating element while it is still in contact with the then reshaped workpiece, is cooled by means of a cooling medium to at least a demolding temperature. It can then be released from the workpiece.
- the heating element is no longer irradiated with IR radiation while it is being cooled.
- the cooling medium is passed through an intermediate space between the heating element and an IR radiation source or IR radiator.
- a wall of the space corresponds to a wall of the heating element.
- the cooling medium for example compressed air
- pressure for example under a pressure of approx. 6 bar
- a pipeline cooling pipe
- Figure 1 shows as a sectional representation in sectional view a sketch of a contact
- Welding tool 1 in the form of a hot riveting tool in the area of its heating element 2.
- the heating element 2 has a contact area (hereinafter referred to as “bottom” 3) for contacting a workpiece (not shown).
- the base 3 here has a thin wall of thickness or wall thickness d as the base 3a, on which at least one suitably shaped contact projection 4 protrudes on the front side.
- This arrangement can also be referred to as a rivet cap base.
- the workpiece can only be contacted with the contact projection 4, additionally in further areas of the front side of the base 3, in particular with the entire front side of the base 3.
- At least the bottom 3 consists of metal (alternatively, e.g., ceramic), for example brass, aluminum or steel, in particular stainless steel.
- metal alternatively, e.g., ceramic
- the use of V2A steel is particularly advantageous, as V2A steel has both a fast heating curve and short cooling time as well as high resistance to mechanical damage, e.g. due to a glass fiber filling in the plastic of the workpiece, and also good chemical resistance.
- the base 3a can in particular be designed as a sheet metal or formed from a sheet metal part.
- the heating element 2 can be moved against the workpiece (or vice versa) and pressed against the workpiece, as indicated by the arrow F.
- the workpiece can then be reshaped.
- the workpiece can consist of thermoplastic, possibly partially crystalline, plastic and can be, for example, a rivet or rivet head.
- a rear side of the base 3 or base 3a facing away from the contact projection 4 serves as a wall or delimitation of a space 5 between the base 3 and an IR-A radiator 6 arranged at a distance therefrom.
- the IR-A radiator 6 is designed to To irradiate the back of the bottom 3 with brief IR radiation IR in order to heat the bottom 3 including its front side and the contact projection 4, for example to an operating temperature of more than 250 ° C, for example to 280 ° C. Since the base 3a is designed as a thin wall, its heat capacity is low, so that the heating or heating of the floor 3 to the desired operating temperature can be achieved very quickly by absorbing the IR radiation IR.
- the cooling of the bottom 3 to or below a desired demolding temperature can also be achieved particularly quickly, namely by flushing the intermediate space 5 with compressed air DL after switching off or deactivating the IR-A radiator 6.
- the space 5 thus serves as a passage space.
- the compressed air DL can, for example, be introduced into the intermediate space 5 via a cooling pipe 7, for example with a pressure between 4 bar and 8 bar, e.g. with approx. 6 bar.
- the diameter of the cooling pipe 7 can for example be between 2 mm and 4 mm, for example 3 mm.
- At least one outlet opening in the form of a vent hole 8 is provided for venting the intermediate space 5.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/DE2019/200089 WO2021018326A1 (de) | 2019-07-26 | 2019-07-26 | KONTAKT-SCHWEIßWERKZEUG UND VERFAHREN ZUM BETREIBEN DESSELBEN |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4005339A1 true EP4005339A1 (de) | 2022-06-01 |
Family
ID=67620238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19752918.3A Pending EP4005339A1 (de) | 2019-07-26 | 2019-07-26 | KONTAKT-SCHWEIßWERKZEUG UND VERFAHREN ZUM BETREIBEN DESSELBEN |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US12296540B2 (de) |
| EP (1) | EP4005339A1 (de) |
| CN (1) | CN114175850B (de) |
| WO (1) | WO2021018326A1 (de) |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4243368A (en) * | 1978-07-31 | 1981-01-06 | Armen Garabedian | Apparatus for making a stress-free plastic article |
| FR2182410A6 (de) * | 1972-04-26 | 1973-12-07 | Holweg Const Mec | |
| US3804691A (en) * | 1972-05-12 | 1974-04-16 | Western Electric Co | Method of bonding using an infrared heating lamp |
| US4029935A (en) * | 1975-05-20 | 1977-06-14 | Blaine G. Greenwell | Tools for applying heat in edge banding operations |
| FI83489C (sv) * | 1988-05-13 | 1991-07-25 | Mekrapid | Förfarande och anordning för sammanfogning av termoplastmaterial |
| US5249410A (en) * | 1992-04-27 | 1993-10-05 | Bakker William J | Device for heat shrinking film onto an open-topped container |
| US5562796A (en) * | 1994-05-24 | 1996-10-08 | Dorner Mfg. Corp. | Heat press for joining the spliced ends of a conveyor belt |
| US6298533B1 (en) * | 1998-12-02 | 2001-10-09 | Sony Corporation | Assembling device for disc cartridge |
| KR100629723B1 (ko) * | 2003-06-12 | 2006-10-04 | 연일화섬공업(주) | 방수공사의 근적외선 융착공법 및 그 장치 |
| DE102004057453B3 (de) * | 2004-11-25 | 2006-04-27 | Maschinenfabrik Spaichingen Gmbh | Verfahren und Vorrichtung zum Verbinden von Gegenständen mittels wenigstens eines plastifizierbaren Verbindungselements |
| DE102011115841A1 (de) * | 2010-11-19 | 2012-05-24 | Heraeus Noblelight Gmbh | Bestrahlungsvorrichtung |
| DE102013216021A1 (de) * | 2013-08-13 | 2015-02-19 | Branson Ultraschall Niederlassung Der Emerson Technologies Gmbh & Co. Ohg | Wärmestrahler, Vorrichtung zum Infrarotschweißen und Verfahren zum Erwärmen von Kunststoffbauteilen |
| DE102013217996B3 (de) * | 2013-09-09 | 2014-08-07 | Rovema Gmbh | Laserbeheizte Siegelvorrichtung |
| DE202014003925U1 (de) * | 2014-05-06 | 2014-06-18 | Technische Universität Chemnitz | Thermoplastischer flächiger Körperverbund und Einrichtung zum Fügen flächiger Körper |
| CN104441620A (zh) * | 2014-12-14 | 2015-03-25 | 芜湖新宝超声波设备有限公司 | 一种红外线辐射焊接单元 |
| PL3156506T3 (pl) * | 2015-10-15 | 2019-06-28 | Automation, Press And Tooling, A.P. & T Ab | Sposób częściowego ogrzewania promieniowaniem do wytwarzania części hartowanych w procesie tłoczenia i układ do takiego wytwarzania |
| CN205184088U (zh) * | 2015-12-17 | 2016-04-27 | 浙江晶科能源有限公司 | 红外焊接设备 |
| WO2017130064A1 (en) * | 2016-01-29 | 2017-08-03 | Magna Exteriors Inc. | Infrared welded exterior panel assembly and process of making same |
| EP3453813B1 (de) * | 2017-09-11 | 2021-07-07 | Woertz Engineering AG | Handlaufinstallation mit notbeleuchtung |
-
2019
- 2019-07-26 WO PCT/DE2019/200089 patent/WO2021018326A1/de not_active Ceased
- 2019-07-26 CN CN201980098243.4A patent/CN114175850B/zh active Active
- 2019-07-26 US US17/614,343 patent/US12296540B2/en active Active
- 2019-07-26 EP EP19752918.3A patent/EP4005339A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN114175850A (zh) | 2022-03-11 |
| CN114175850B (zh) | 2025-04-15 |
| WO2021018326A1 (de) | 2021-02-04 |
| US20220227064A1 (en) | 2022-07-21 |
| US12296540B2 (en) | 2025-05-13 |
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