DE3110159A1 - Hand welding device for joining plastic pipes and/or plastic fittings - Google Patents

Abstract

The invention relates to a hand welding device for joining plastic pipes and/or plastic fittings. To provide an easy-to-handle device without expensive hydraulic adjustment equipment for adjusting the clamping apparatuses, the invention provides for the heating device to be firmly attached to a device frame, for a sliding carriage to be adjustable to a limited extent on guides fixed on the frame, for the clamping apparatuses to be adjustable to a limited extent, transversely to the adjustment direction of the carriage, on guides fixed to the carriage, for the guides fixed to the frame and fixed to the carriage to be arranged and designed in such a manner that the clamping apparatuses are arranged on both sides of the contact elements, with the greatest distance between the clamping apparatuses and one limit position of the sliding carriage, and with the centre axes of their receptacles for the plastic parts aligned with the centre axes of the contact elements and are adjustable with respect to the latter, and, in the other limit position of the sliding carriage, for the clamping apparatuses to be located outside the contact elements of the heating device and to be adjustable towards one another until they come into contact.

Description

Hand welding device for joining plastic

Pipes and / or plastic fittings The invention relates to a Hand welding device for connecting plastic pipes and / or plastic fittings with an electric heater that works on the connecting surfaces of each other has matching, heatable contact elements to be connected to plastic parts, and with two tensioning devices adjustable in relation to each other and in the direction of the contact elements, in which the plastic parts to be connected can be fixed.

Welding devices of this type are known which have actuating devices for which clamping devices are provided. To operate the actuating devices usually a hydraulic system with a pump and hydraulic cylinder provided what a entails additional effort and weight. The welding machines of this type are therefore preferred in the sanitary sector and pipeline construction. For laying a pipeline network for underfloor heating, such a system is required Welding machine not suitable.

It is the object of the invention to provide a hand welding device of the type mentioned at the beginning To create kind that is manageable and lightweight, can be built on its own Adjusting devices waived, but nevertheless all work that goes to Butt welding of plastic pipes or for welding in a plastic pipe in a plastic molding are required, made possible solely by manual measures.

This object is achieved according to the invention in that the heater is firmly attached to a device frame that a slide on guides fixed to the frame is limited adjustable that the clamping devices on slide fixed guides limited transversely to the direction of adjustment of the slide are adjustable that the frame fixed and slide fixed guides are arranged and designed so that at the largest Distance between the clamping devices and the one end position of the slide the clamping devices arranged on both sides of the contact elements and with the central axes of their receptacles for the plastic parts. aligned with the central axes of the contact elements and are adjustable against this, and that in the other end position of the slide the clamping devices are outside the contact elements of the heater and can be adjusted against each other until they are in mutual contact. Through this coordinate-like The plastic pipe and / or the plastic molded piece can adjust the clamping devices without interference from the permanently mounted heater in the clamping devices be determined.

If you then bring the slide into one end position, they are Clamping devices with the plastic parts fixed in them and to be connected to one another necessarily aligned so that the clamping devices against the contact elements can be adjusted.

The contact elements come with the connecting surfaces of the plastic parts in contact and plasticize them. After plasticizing the connecting surfaces the slide is brought into the other end position in which the clamping devices can be adjusted against each other up to the system. The plasticized Connection surfaces when butt welding plastic pipes to one another and when Welding a plastic pipe into a Plastic molding guided into each other and kept under pressure until the cooling and solidification of the Connecting surfaces has occurred.

With the device frame designed in this way and the ones made possible by it Adjustment movements becomes a light and easy-to-use hand welding device created, which can preferably be used on construction sites.

The weight of the hand welder can be reduced by a simple design Reduce the equipment rack in that the equipment rack has two angle profile sections has, which form the standing surface with one leg that the other legs rigidly connected to one another with two guides designed as guide rods are and that on an angle profile section a clamp with two clamping legs is attached in which the heater is attached.

The correct assignment of the contact elements of the heater to the Clamping devices can be achieved according to one embodiment that the Heater with a thermally conductive support in the area of the guides fixed to the frame protrudes and that the contact elements are attached to both sides of the carrier, which are directed perpendicular to the adjustment plane of the guides fixed to the frame.

The shape of the contact elements depends on the shape of the Plastic parts to be connected to one another. According to one embodiment, it is provided that that for butt welding of two plastic pipes the contact elements as discs are designed while for welding a plastic pipe into a plastic molding the one contact element is designed as a mandrel, the outer diameter of which on the Inner diameter of the receptacle of the plastic molding is designed while the other contact element is designed as a pot, the inner diameter of which the outer diameter of the plastic pipe is matched.

A universal use of the hand welding device according to the invention is achieved in that the contact elements are releasably attached to the support of the heater are attached and that the connection of an ion of the central axis of the contact elements arranged connecting element is executed. If one puts differently shaped and contact elements of different sizes are ready, then both types of welding can be used (Butt welding and welding) for plastic parts with different diameters with one and the same hand welder.

The exact alignment of the clamping devices and the contact elements in one end position of the slide is particularly important when welding. This is achieved according to a simple embodiment in that the with the frame fixed Guides connected legs of the angle profile sections as stops the end positions of the slide and that the vertical distance between the central axes of the contact elements to these legs of the angle profile sections equal to the vertical distance of the Center axes of the recordings for the plastic parts in the clamping devices corresponds to the side of the slide facing the heater.

In order to have sufficient adjustment options on both sides of the heater to have for the clamping devices, which is very important when welding according to one embodiment provided that the clear distance between the clamping devices in their end positions on the slide-fixed guides by at least twice as much Connection depth between a plastic pipe and a plastic fitting is greater is the outer dimension of the contact elements in the direction of adjustment of the clamping devices and that the carrier with the contact elements approximately in the middle between the in the End positions placed on the slide fixed guides clamping devices arranged is.

So that the clamping devices in the other end position of the slide are safely out of the area of the contact elements and up to mutual contact can be adjusted against each other, is provided according to a further embodiment, that the adjustment path of the slide on the guides fixed to the frame is at least the 2 to 3 times the width of the carriage in its adjustment direction.

The adjustment of the slide and the clamping devices is according to a development facilitated and improved in that the carriage by means of Bearing bushes inserted in bores or the like.

is performed on the fixed guides that with the ends of the Slide bearing plates are connected, in which the slide fixed, as guide rods trained guides are set and that two-part clamping devices are releasable are attached to cross slide, which by means of the same inserted into holes Bearing bushes or the like. Are guided on the slide fixed guides.

This configuration also has the advantage that, depending on the diameter of the plastic parts, different clamping devices are connected to the cross slide can be.

As the plastic pipes and / or plastic molded parts to be connected to one another but can have certain tolerances, provides a further design, that at least one clamping device with its base part on the associated cross slide is attached so that it can be adjusted and locked on all sides. In this way, the Central axes of the plastic parts fixed in the clamping devices against each other adjust and lock. This ensures that, especially when welding in, the contact elements, which are clearly aligned on the carrier of the heater, are also correct pushed onto the plastic pipe or into the receptacle of the plastic molded piece be inserted.

The invention is based on an embodiment shown in the drawings explained in more detail. It shows: FIG. 1 a side view of a hand welding device according to FIG Invention and FIG. 2 shows the top view of the hand welding device according to FIG. 1.

The side view of Fig. 1 clearly shows the structure of the device frame and recognize the fixed attachment of the heater 10. The equipment rack includes two Angle profile sections 22 and 23, each of which a leg forms the base. The other legs of the angle profile sections 22 and 23 are, as shown in FIG is seen, at their ends by means of the two designed as guide rods Guides 24 and 25 fixed to the frame are rigidly connected to one another. At the angle profile section 22 a plate 21 is attached, on the vertically aligned a clamp 17 is arranged with its two clamping legs 18 and 19. The clamp 17 forms a clamping receptacle for the heater 10, to which the heating current via the power cable 11 is fed. The radiator is embedded in an insulating body 12 over which the heater 10 is fastened in the clamp 17. A clamping screw 20 connects the ends of the clamping legs 18 and 19, so that the heater 10 are fixed can.

The carrier 13 is over the heater embedded in the insulating body 12 heatable. The end of the carrier 13 extends beyond the angled profile section 22 in the area of the guides 24 and 25 fixed to the frame. On the sides of the carrier 13, which are perpendicular to that formed by guides 24 and 25 fixed to the frame Adjustment plane are directed, the contact elements 14 and 16 are attached. That Contact element 16 is designed as a pot in the embodiment, the inner diameter of which the outer diameter of the plastic pipe is designed, which in the clamping device 38 is stretched. The contact element 14 is designed as a mandrel with an end collar 15, the outside diameter of which is the inside diameter of the receptacle of a plastic molding is designed, which is set in the span in direction 31.

The carriage 26 is limited to the guides 24 and 25 which are fixed to the frame adjustably guided, the legs 24 and 25 connected to these guides the angle profile sections 22 and 23 act as stops and the end positions of the slide 26.

In this case, bores of the carriage 26 bearing bushes or the like.

record the adjustment of the slide 26 on the guides 24 and 25 to facilitate and improve.

At the ends of the carriage 26 bearing plates 29 are attached, such as the connection points 30 indicate. These bearing plates 29 take over the carriage 26, the two guides 27 and 28 fixed to the slide, which are transverse to the fixed to the frame Tours 24 and 25 run. The clamping devices 31 and 38 for receiving the Plastic parts to be connected are releasably connected with cross slide 39, those on the guides 27 and 28 fixed to the slide up to the stop on the bearing plates 29 are adjustable. The bearing plates 29 therefore also determine the end positions of the clamping devices 31 and 38 connected to the cross slide 39, like the top view according to Fig. 2 can be seen.

The clamping devices 31 and 38 are in two parts. There is at least In the case of a clamping device, e.g. 31, the base part 32 on all sides adjustable and attached to the associated cross slide 39 in a lockable manner. It is sufficient if the locking means 36 is guided in a larger bore in the base part 32. The upper part 33 of the clamping device 31 is on the base part via the joints 34 32 hinged and can by means of the clamping nut 35, which is on a clamping screw of the Base part 32 is adjustable, can be braced against the base part 32. It will the plastic part introduced into the receptacle 37 cannot be rotated and cannot be displaced held. In the exemplary embodiment, the receptacle 37 is the clamping device 31 Designed to accommodate a plastic sleeve while in the clamping device 38 the recording of the outside diameter of the plastic pipe to be fixed in it is equivalent to.

The arrangement and design is now such that the vertical distance the central axes of the contact elements 14 and 16 to that through the legs of the angle profile section 22 the vertical distance between the central axes of the receptacles 37 the span in directions 31 and 38 to the heater 10 facing side of the Carriage 26 corresponds. In addition, the clear distance between the clamping devices 31 and 38 in the end positions according to FIG. 2 by at least twice the connection depth the plastic parts to be connected are larger than the external dimensions of the contact elements 14 and 16 in the direction of adjustment of the clamping devices 31 and 38.

Finally, the adjustment path of the slide 26 is fixed to the frame Guides 24 and 25 at least 2 to 3 times larger than the width of the slide 26 in its direction of adjustment.

The workflow with a hand welder should now be carried out according to the Invention will be explained when a plastic pipe is welded into a plastic sleeve shall be. The plastic sleeve is in the receptacle 37 of the clamping device 31 set, being flush with the one facing the heater 10 Inside of the clamping device 31 closes. The plastic tube is in the receptacle the clamping device 38 clamped, with it on the heater 10 facing Inside protrudes by at least the connection depth. Are the plastic sleeve and the plastic pipe so set, then the clamping devices 31 and 38 brought into the end positions shown in Fig. 2 and the carriage 26 on the Fixed guides 24 and 25 up to the stop on the angle profile section 22 adjusted.

The clamping devices 31 and 38 are moved via the cross slides 39 on the slide fixed guides 27 and 28 manually in the direction of the contact elements 14 and 16 moved on the carrier 13, the plastic tube by the connection depth pushed into the contact element 16, which is designed as a pot, and the plastic sleeve pushed onto the contact element 14 designed as a mandrel by the connection depth will. The heated contact elements 14 and 16 plasticize the connecting surfaces of the two plastic parts. Once the plasticization has been carried out, the Clamping devices 31 and 38 on their cross slide 39 on the slide fixed Guides 27 and 28 set back in their end positions. Thereby the contacts lifted with the contact elements 14 and 16, so that the carriage 26 on the frame fixed Guides 24 and 25 in the fixed by the stop on the angle profile section 23 End position can be moved. The clamping devices 31 and 38 are with the clamped plastic parts on their cross slide 39 on the slide fixed Guides 27 and 28 adjusted against each other, with the outside plasticized end of the plastic pipe in the plastic sleeve inside is inserted. After the cooling and solidification phase is the plastic pipe welded into the plastic sleeve and the interconnected plastic parts can be released from the clamping devices 31 and 38 and removed.

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Claims (12)

Claims II Hand welding device for connecting plastic pipes and / or plastic moldings with an electric heater that clicks on the connecting surfaces Heatable contact elements that are matched to the plastic parts to be connected has, and adjustable with two against each other and in the direction of the contact elements Clamping devices in which the plastic parts to be connected can be fixed are, characterized in that the heater (10) is fixed to a device frame is attached that a slide (26) is limited to guides (24, 25) fixed to the frame it is adjustable that the clamping devices (31,38) are on guides fixed to the slide (27,28) can be adjusted to a limited extent transversely to the direction of adjustment of the slide (26), that the guides (24, 25 and 27, 28) fixed to the frame and fixed to the slide are arranged in such a way and are designed that at the greatest distance between the clamping devices (31,38) and the an end position of the carriage (26) the clamping devices (31,38) on both sides the contact elements (14,16) arranged and with the Central axes their receptacles (37) for the plastic parts on the central axes of the contact elements aligned and adjustable against this, and that in the other end position of the slide (26), the clamping devices (31, 38) outside the contact elements (14,16) of the heater (10) and up to mutual contact against each other are adjustable. 2. Hand welding device according to claim 1, characterized in that the Equipment frame has two angled profile sections (22,23) with one leg form the standing surface that the other legs are designed as two guide rods Guides (24,25) are rigidly connected to one another and that on an angle profile section (22) a clamp (17) with two clamping legs (18,19) is attached in which the heater (10) is attached. 3. Hand welding device according to claim 1 or 2, characterized in that that the heater (10) with a thermally conductive support (13) in the area of the frame fixed Guides (24,25) protrudes and that the contact elements (14,16) on both sides of the carrier (13) are attached perpendicular to the adjustment plane of the frame-fixed Guides (24,25) are directed. 4. Hand welding device according to one of claims 1 to 3, characterized in that that for the butt welding of two plastic pipes the contact elements as washers are trained. 5. Hand welding device according to one of claims 1 to 3, characterized in that that for welding a plastic pipe into a plastic molding the one Contact element (14) is designed as a mandrel, the outer diameter of which corresponds to the inner diameter the recording of the plastic molding is designed, while the other contact element (16) is designed as a pot, the inner diameter of which is equal to the outer diameter of the plastic pipe is matched. 6. Hand welding device according to one of claims 3 to 5, characterized in that that the contact elements (14,16) are detachably attached to the carrier (13) of the heater (10) are and that the connection of one in the central axis of the contact elements (14,16) arranged connecting element is executed. 7. Hand welding device according to one of claims 2 to 6, characterized in that that the legs of the angle profile sections connected to the guides (24, 25) fixed to the frame (22,23) as stops set the end positions of the carriage (26) and that the perpendicular distance between the central axes of the contact elements (14,16) and these legs the angle profile sections (22,23) equal to the vertical distance between the central axes the receptacles (37) for the plastic parts in the clamping devices (31,38) corresponds to the side of the carriage (26) facing the heater (10). 8. Hand welding device according to one of claims 1 to 7, characterized in that that the clear distance between the clamping devices (31,38) in their end positions on the slide fixed guides (27,28) by at least twice the connection depth between a plastic pipe and a plastic fitting is larger than the outer dimension of the contact elements (14, 16) in the direction of adjustment of the clamping devices (31, 38). 9. Hand welding device according to one of claims 1 to 8, characterized in that that the carrier (13) with the contact elements (14,16) approximately in the middle between the clamping devices brought into the end positions on the guides (27, 28) fixed to the slide (31,38) is arranged. 10. Hand welding device according to one of claims 1 to 9, characterized in that that the adjustment path of the slide (26) on the guides (24, 25) fixed to the frame at least 2 to 3 times the width of the carriage (26) in its direction of adjustment is equivalent to. 11. Hand welding device according to one of claims 1 to 10, characterized in that that the carriage (26) by means of bearing bushes or the like inserted into bores. is guided on the fixed guides (24,25) that with the ends of the carriage (26) Bearing plates (29) are connected, in which the slide fixed, as guide rods trained guides (27,28) are set and that two-part clamping devices (31,38) are releasably attached to the cross slide (39), which by means of bores the same inserted bearing bushes or the like. On the slide-fixed guides (27,28). 12. Hand welding device according to claim 11, characterized in that at least one clamping device (31) with its base part (32) on the associated The cross slide (38) is attached so that it can be adjusted and locked on all sides.