CN114846906A - Portable multipurpose melting appliance and equipment with same - Google Patents

Abstract

The present invention relates to a portable multipurpose melting appliance (110, 300, 350, 450, 650, 850) having at least one inductively heatable heating tip (152) for melting molten metal formed from different meltable materials Melting cartridge (130), wherein at least one heating element (170, 264, 274, 284, 294, 296, 370, 410) connected to said heating tip (152) and/or said heating tip (152) Heating only up to the specified maximum temperature.

Description

Portable Multipurpose Melting Appliances and Equipment With Portable Multipurpose Melting Appliances

technical field

The present invention relates to a portable multipurpose melting appliance having at least one inductively heatable heating tip for melting melting cartridges formed of different meltable materials. Furthermore, the invention relates to an apparatus having at least one such portable multipurpose melting appliance and having a base station.

Background technique

Inductively heatable, cordless, and therefore mobile multipurpose melting appliances in the form of glue pens are known from the prior art, the heating of the glue pens in each case being carried out in an associated base station. At least in the base station, complex adjustment electronics are required in order to avoid overheating of the hot-melt pens temporarily inserted into the base station for heating, respectively. If the hot-melt glue pen has an additional heating device independent of the base station to prolong the service time, active electronic components, such as complex temperature-regulating electronics and an electrical energy storage device, are likewise arranged inside the hot-melt glue pen, thereby further improving the complexity of the entire system.

SUMMARY OF THE INVENTION

The invention first relates to a portable multipurpose melting appliance having at least one inductively heatable heating tip for melting melting cartridges formed of different meltable materials. The at least one heating element and/or the heating tip connected to the heating tip can only be heated to a predetermined maximum temperature.

It should be noted that, within the scope of the present invention, the term "portable multipurpose melting appliance" refers to a hand-held multipurpose melting appliance. The multipurpose melting appliance can preferably be operated cordless or cordless and is therefore mobile.

The invention thus enables an improved self-regulation of the heating tip of the multipurpose melting device, structurally and/or predeterminable by a corresponding material selection. At a predeterminable maximum temperature, an application-appropriate plasticization of the material of the melting cartridge is preferably ensured. Therefore, complex and therefore expensive electronic adjustment devices inside the multipurpose melting appliance and/or in the base station are dispensable. A particularly simple structure can be achieved in the case where the heating tip simultaneously functions as a heating element. Contrary to this, the provision of additional heating elements enables the heating tip to be constructed from any metal, such as aluminium alloys or aluminium, which has a good heat storage capacity maximizing service life. In principle, the at least one heating element fixedly connected to the heating tip can have any desired shape.

Preferably, the at least one heating element connected to the heating tip and/or the heating tip has a ferromagnetic alloy assigned a defined Curie temperature of between approximately 75°C and 750°C.

In this way, by means of the multipurpose melting device, various materials or substances can be melted and subsequently processed.

Preferably, a pen-shaped housing is provided with a supply section, an interior space for receiving at least one melting cartridge, and a gripping section near the heating tip for gripping on the user's side , wherein preferably the gripping section at least partially surrounds the heating tip for thermal isolation. The pen-shaped housing is preferably substantially rotationally symmetrical with respect to the longitudinal center axis.

As a result, the multipurpose melting device has a manual operation according to the usual writing tools and can thus be used intuitively, variously, flexibly and creatively by the user.

According to a preferred configuration, the heating tip is embodied as a nozzle with a nozzle chamber and a reduced diameter discharge opening for the molten material of the melting cartridge.

Thereby, the multipurpose melting appliance can be used as a universal application appliance for applying different meltable materials such as plastics, waxes or food products to workpieces. If the heating tip of the multipurpose melting device is not embodied as a hollow nozzle with a discharge opening, but as a solid body, completely new application possibilities are opened up, such as brazing, thermal cutting of plastics, on wood of burning decorations and more.

Preferably, the nozzle is connected to at least one heating element which is approximately hollow cylindrical, hollow frustoconical, cylindrical shell, frustoconical shell and/or bar-shaped.

As a result, different options are obtained with regard to the heat transfer between the heating element and the nozzle and the location of the heat introduction into the nozzle. The heating element is preferably fixedly connected to the nozzle body of the nozzle in order to achieve as little resistance to heat transfer as possible.

Preferably, the nozzle has a self-closing and spring-loaded ball valve. The ball of the ball valve is preferably axially preloaded by means of a frustoconical compression spring.

Thereby, the coating results can be further improved by means of the multipurpose melting device. Furthermore, the molten material of the melting cartridge is reliably prevented from dripping out of the nozzle of the multipurpose melting appliance. Furthermore, the ball valve, which is rotatably received in the nozzle, makes it easier for the user to guide the nozzle on the surface of the workpiece, since only a significantly reduced rolling resistance has to be overcome.

Preferably, the heating element of the nozzle is arranged between the shoulder of the nozzle and a metal ring which is fixedly connected to the nozzle, preferably pressed or heat-shrunk.

This simplifies the manufacture of the multipurpose melting appliance. In particular, by axial movement of the heating element relative to the central plane of the coils of the induction heating device prior to the final fixation of the metal ring, during the manufacturing process in the base station or the manufacturing aid co-functioning with the base station, the Simple adjustment of the temperature is possible.

Preferably, the heating element is spring-loaded axially in the direction of the outlet opening of the nozzle by means of a spring element supported between the shoulder and the metal ring. The metal ring and the nozzle are preferably made of the same metal and/or the same metal alloy in order to avoid thermal stress.

In this way, tolerances caused by the manufacturing technique, alloy-induced fluctuations in the Curie temperature of the heating element and thermal stresses can also be compensated for after the metal ring is attached to the nozzle.

Preferably, the heating element has a plurality of rectangular, trapezoidal or V-shaped and axially non-penetrating recesses, preferably arranged uniformly spaced from one another on the circumferential side, on the end section facing away from the outlet opening of the nozzle.

This opens up another possibility to adjust the temperature of the heating element and thus the achievable temperature of the nozzle of the multipurpose melting appliance in question.

According to an advantageous development of the multipurpose melting device, the multipurpose melting device is assigned a feed device for the melting cartridge, wherein the melting cartridge is axially preloaded in the direction of the nozzle by means of a compression spring, and The feed device has at least one actuating element spring-loaded radially outward with an integral cutting clamp.

As a result, the melting cartridge for plasticizing the additional material inside the nozzle of the multipurpose melting device is moved comfortably and ergonomically for the user. Thus, continuous and at least almost fatigue-free work with the pen-shaped multipurpose melting device is also possible if necessary (besides changing the melting cartridge).

In one configuration, the melting cartridge is held axially by means of the associated cutting clamp when the at least one actuating element is released on the user side. The cutting clamp is preferably formed by a chamfered plane and a cutting edge.

This provides a robust and structurally simple feeding device which reliably prevents the melting of the melting cartridge when the operating element is not actuated.

Preferably, the melting cartridge can be released by pressing the at least one actuating element pointing radially inward on the user side and can be fed in the direction of the nozzle by means of a pressure spring.

Thereby, the user of the multipurpose melting appliance can single-handedly dose additional material to the nozzle for melting and coating onto the workpiece.

Furthermore, the present invention provides a device with at least one portable multipurpose melting appliance and with an external base station with at least one receiving well with induction heating, wherein at least locally in the at least one receiving well can be ground receiving at least one heating tip of at least one multipurpose melting appliance for induction heating by means of an induction heating device.

Accordingly, the present invention can provide an apparatus having said at least one portable multipurpose melting appliance and a base station, in which apparatus a controllability of the heating tip of the multipurpose melting appliance can be achieved in construction and/or by corresponding material selection. Improved self-regulation of a predetermined temperature.

Preferably, the base station has at least two receiving wells each for one portable multipurpose melting appliance.

Thereby, a number of simple and thus cost-effective multipurpose melting appliances can be used to use melting cartridges made of different materials on a single compact base station.

Preferably, the receiving wells of the base station are each formed inclined at an angle preferably between 0° and 60° with respect to the vertical of the base. This angle can be variable if necessary.

Therefore, the ergonomics of the device can be further optimized for the user.

Description of drawings

In the following description, the invention is explained in more detail with the aid of the exemplary embodiments shown in the drawings. The attached figure shows:

Fig. 1 is a schematic longitudinal section of an apparatus according to the invention with a multipurpose melting appliance received in a base station,

Figure 2 is an enlarged longitudinal section of the multipurpose melting appliance of Figure 1,

Figure 3 is an enlarged longitudinal section of the nozzle of the multipurpose melting appliance of Figure 1,

Figure 4 is a schematic view of the nozzle of Figure 3 with a heating element according to another embodiment,

Figure 5 is a schematic diagram of the nozzle of Figure 4 with an alternative heating element,

Figure 6 is a schematic view of the nozzle of Figure 4 with a heating element according to another embodiment,

Figure 7 is a schematic diagram of the nozzle of Figure 4 with an alternative heating element,

Figure 8 is a partial longitudinal section of another embodiment of the multipurpose melting appliance with the nozzle of the ball valve in the closed state,

FIG. 9 is a longitudinal section of the nozzle of FIG. 8 in the open state of the ball valve,

Figure 10 is a schematic partial longitudinal section of another embodiment of a multipurpose melting appliance insertable into the apparatus of Figure 1,

Figure 11 is a schematic perspective view of the heating element of the nozzle of the multipurpose melting appliance of Figure 10,

Figure 12 is a schematic diagram of another embodiment of a heating element for the nozzle of the multipurpose melting appliance of Figure 10,

Figure 13 is a schematic partial top view of an alternate embodiment of a multipurpose melting appliance with an embodiment of a feeder,

Figure 14. Longitudinal section of the multipurpose melting appliance of Figure 13,

Fig. 15 is a schematic longitudinal section of another embodiment of the feed device of the multipurpose melting appliance of Fig. 13,

Fig. 16 is a schematic longitudinal section of another embodiment of the feeding device of the multipurpose melting appliance of Fig. 13,

Figure 17 is a schematic longitudinal section of another embodiment of the feeding device of the multipurpose melting appliance of Figure 13,

FIG. 18 is a longitudinal section of the multipurpose melting appliance in an alternative embodiment with another embodiment of the feeding device,

Figure 19 is a longitudinal cross-sectional view of the multipurpose melting appliance of Figure 18, with another embodiment of the feeding device,

Figure 20 is a longitudinal cross-sectional view of the multipurpose melting appliance of Figure 18, with an alternate embodiment of the feeder,

Figure 21 is a longitudinal cross-sectional view of the multipurpose melting appliance of Figure 18, with another embodiment of the feeding device,

Figure 22 is a longitudinal section of a multipurpose melting appliance in another embodiment,

Fig. 23 is an enlarged view of part A of Fig. 22, and

FIG. 24 is an enlarged view of part B of FIG. 22 .

In the figures, elements having the same or similar functions are provided with the same reference numerals and are described exactly once only.

Detailed ways

FIG. 1 shows an exemplary apparatus 100 having an exemplary portable multipurpose melting appliance 110 received in a base station 104 . The base station 104 includes at least one receiving well 106 having an induction heating device 150 as shown. In the at least one receiving well 106 , the heating tip 152 of the at least one multipurpose melting appliance 110 can be received at least partially by means of an induction heating device 150 for induction heating, as shown. The base station 104 may have two or any more structurally identical receiving wells 106 for receiving additional portable multipurpose melting appliances 110, not shown. In this case, an induction heating device 150 is preferably assigned to each receiving well.

The at least one receiving well 106 may preferably work with respect to the vertical 180 and the base 182 or at an angle a preferably between 0° and 60° (as shown with the dash-dot outline and at an angle a of 45°) The plane is configured obliquely on which the device 100 is placed. The at least one induction heating device 150 is preferably capable of supplying the electrical energy required for operation without galvanic isolation using at least one grid component 210 , which is preferably constructed according to the type of clocked, low-loss voltage converters.

The portable multipurpose melting appliance 110 preferably has an approximately pen-shaped housing 120, which preferably has a supply section 122, an interior space 124 for receiving at least one thermoplasticizable melting cartridge 130, The gripping section 126 that the user grasps near the heating tip and the end section 128 pointing away from the gripping section 126 . The pen-shaped housing 120 is preferably constructed substantially rotationally symmetrical with respect to the longitudinal center axis 140 , which, when the angle α of the receiving well 106 is adjusted here, which is approximately 0° with respect to the vertical 180 , is relative to the longitudinal center axis 140 . Vertical lines coincide. The heating tip 152 is preferably at least partially surrounded by a sealing element 132 which, together with the stop 108 of the receiving well 106 , constitutes an axial insertion boundary for the multipurpose melting device 110, thereby ensuring that the inductive heating device 150 and the heating tip 152 are in contact with each other. suitable orientation in between for the desired heating result for a specific application. For thermal isolation, the heating tip 152 is preferably at least partially surrounded by the gripping section 126 of the multipurpose melting device 110 .

The heating tip 152 is preferably designed as a hollow nozzle 154 for the focused discharge of the material of the melting cartridge 130 that can be plasticized by means of the induction heating device 150 and the heating tip 152 . The heating tip 152 may be formed of a metallic material, which may be directly induction heated to a predetermined maximum temperature by the induction heating device 150 . Alternatively, the heating tip 152 can be heated indirectly by means of a heating element ( 170 in FIG. 2 ) made of an inductively heatable metallic material, wherein at least one heating element is arranged locally on the heating tip 152 and is fixedly connected therewith to improve heat transfer. Additionally, the heating tip 152 may be implemented with a solid body formed from an inductively heatable material, and may, for example, have a chisel-like, thorn-like or blade-like shape.

The multipurpose melting device 110 can thus be used as a general-purpose applicator for applying widely different meltable or plasticizable materials such as plastics, hot melts, waxes, low melting metals or food products to the workpiece 176 superior. Other applications are, for example, the manufacture of 3D filaments comprising polylactide (PLA), which consists of many lactic acid molecules chemically bonded to each other, or from acrylonitrile-butadiene-styrene (ABS) . Melting cartridges made of, for example, natural waxes, sealing waxes, synthetic waxes, hard waxes, coloured waxes or lipsticks can likewise be processed by means of the multipurpose melting device 110 . Furthermore, coatings with powder paint and plastic coatings in granular and/or stick form can be provided. In addition, melting cartridges made of food are processable. Here, melting cartridges with chocolate, gelatin, cheese, sugar, caramel, icing, spreads, spices, flavors, and nut flours can be placed into the multipurpose melting appliance 110 . Additionally, melting cartridges made of metals such as tin or other low melting point metal alloys can be processed so that the multipurpose melting appliance 110 can also be used like a conventional brazing appliance. If the heating tip 152 of the multipurpose melting device 110 is not embodied as a hollow nozzle 154 but as an inductively heatable solid body, completely new fields of application are opened up, for example (soldering), thermal cutting of thermoplastics , burning decoration on wood or plastic, etc. The heating tip 152 can essentially only be heated to a predetermined maximum temperature.

If the base station 104 has more than one receiving well 106 and the multi-purpose melting device 110 is received therein, the heating tips 152 can respectively reach different predetermined maximum temperatures, so that the user can use the device 100 and a plurality of multi-purpose melting tools Use The melting appliance handles melting cartridges with different materials or raw materials, which respectively have different melting or plasticizing temperatures, in a simple and comfortable manner.

FIG. 2 shows the multipurpose melting appliance 110 of FIG. 1 and illustrates its construction. The melting cartridge, not shown in FIG. 2 , can preferably be fed by a user by means of a feed device 190 with an operating element 192 in the direction of the heating tip 152 configured as a nozzle 154 and can thus be melted or plasticized on the front side. For this purpose, the feed device 190 preferably has a cutting clamp 200 which presses or bites into the melting cartridge slightly at the surface and which, in the unactuated state of the actuating element 192 , keeps the melting cartridge at Fixed position in axial position reached at one time. The nozzle 154 is preferably surrounded radially on the outside by a heating element 170 which can be heated inside the base station (see FIG. 1 , reference numeral 150 ) by means of an induction heating device 150 (not shown here) up to a predetermined maximum temperature.

The heating element 170 may be formed of a ferromagnetic alloy having a defined Curie temperature preferably between 75°C and 750°C. Therefore, the heating tip 152 preferably cannot be heated above the Curie temperature specified by the manufacturer, as the material loses its magnetic properties at higher temperatures. Due to this autonomous temperature regulation nature of the heating tip 152 or nozzle 154, electronic control and/or regulation of the induction heating device 150 within the base station may be omitted. By providing a plurality of multipurpose melting appliances of the type of the described multipurpose melting appliance 110, each of whose heating tips 152 are formed of ferromagnetic alloys with different Curie temperatures, it is possible to utilize the same apparatus (see FIG. 1 , appendix ). Reference numeral 100) allows the user to process melting cartridges made of different materials or raw materials at the same time in a simple and comfortable manner.

Alternatively, the heating tip 152 of the multipurpose melting appliance 110 may be constructed entirely of a ferromagnetic alloy, thereby resulting in a structurally simplified construction. Additionally, the heating tip 152 may be constructed of preferably food grade stainless steel, stainless steel alloys, other metals or other metal alloys that do not have a defined Curie temperature. In this case, it may be necessary to electronically control and/or regulate the induction heating device 150 of at least one receiving well of the base station according to a predetermined maximum temperature of the heating tip 152 . Such adjustment mechanisms are familiar to those skilled in the art of electric heating appliances, such as hot glue pens or multi-purpose melting appliances, so that further technical descriptions can be dispensed with within the scope of this description.

FIG. 3 shows the heating tip 152 of the multipurpose melting appliance 110 of FIG. 1 , which is illustratively implemented as a nozzle 154 . In the region of the gripping section 126 , the nozzle body 156 and the sealing element 132 preferably adjoin one another in the axial direction, preferably abutting. According to one embodiment, the nozzle body 156 includes a cylindrical section 160 to which a tapered section 162 axially engages, which in turn transitions axially into a hollow cylindrical thin section of reduced diameter in tube 164. The cylindrical section 160 and/or the conical section 162 preferably form a nozzle chamber 158 in which the material of the melting cartridge is first plasticized. The thin tube 164 has a cylindrical nozzle channel 166 with a discharge opening 168 for the plasticized or melted material of the melting cartridge. The nozzle 154 of the heating tip 152 is at least partially coaxially surrounded by the heating element 170 as shown.

FIG. 4 shows the nozzle 154 of FIG. 3 constructed in accordance with another embodiment 250 . In addition to the thin tube 164 , the nozzle 250 is preferably surrounded almost completely on the peripheral side by a heating element 264 , which is preferably hollow truncated-conical and hollow-cylindrical. This can result in the highest possible heat transfer between the induction heated heating element 264 and the nozzle 250 .

FIG. 5 shows the nozzle 250 of FIG. 4 with a heating element 274 according to another embodiment. The preferably hollow frustoconical heating element 274 preferably completely surrounds the conical section 162 of the nozzle 250 , whereby the heat transfer between the heating element 274 and the nozzle 250 takes place mainly in the most relevant region.

FIG. 6 shows the nozzle 250 of FIG. 4 with an alternate heating element 284 . According to a further embodiment, the preferably hollow-cylindrical heating element 284 comprises only the cylindrical section 160 of the nozzle 250 , thereby resulting in a simplified and cost-effective production of the heating element 284 .

FIG. 7 shows the nozzle 250 of FIG. 4 having preferably two substantially identically sized, approximately bar-shaped or half-shell-shaped heating elements 294 , 296 . The two half-shell-shaped heating elements 294 , 296 are preferably arranged uniformly on the cylindrical section 162 at a circumferential distance from one another and are preferably fixedly connected thereto. Two narrow longitudinal gaps 298 extend between the heating elements 294 , 296 , of which only one longitudinal gap 298 in front is visible here. The longitudinal gaps 298 here preferably extend parallel to the longitudinal center axis 140 and are located approximately diagonally with respect to each other on the peripheral side.

In contrast to the illustration of FIG. 7 with two approximately half-shell-shaped heating elements 294 , 296 , three or more heating elements may also be provided, leaving a corresponding number of longitudinal gaps 298 . The longitudinal gap 298 may also have a circumferential width of approximately zero, so that the heating elements directly abut each other on the circumferential side or bear against each other. Furthermore, the heating element can also be configured in a C-shape. The heating elements 264 , 274 , 284 , 294 , 296 are preferably formed using the above-described ferromagnetic alloys with a defined Curie temperature, but alternatively can also be used that can be heated by means of the induction heating device 150 to a predetermined temperature. The highest temperature metal or metal alloy is formed.

FIG. 8 illustrates another embodiment of the nozzle 306 of the portable multipurpose melting appliance 300 that can be used in place of the nozzle 154 in the multipurpose melting appliance 110 of FIG. 1 . The nozzle 306 preferably has a ball valve 320, wherein the ball valve 320 is shown in a closed state in FIG. 8 . The nozzle 306 preferably includes the heating element 274 of FIG. 5 configured for indirect heating. According to an alternative embodiment, the nozzle 306 can be assigned an indirect or direct-acting resistance heating device.

The gripping section 126 of the preferably pen-shaped housing 120 of the multipurpose melting device 300 is preferably connected to the nozzle 306 by means of the sealing element 132 . The nozzle 306 particularly preferably comprises a conical section 310 with a discharge opening 312 which, in cooperation with a ball 314 and a frustoconical compression spring 316 , forms a ball valve 320 . A cylindrical section 322 adjoins the conical section 310 of the nozzle 306 . The sleeve 324 , which is coaxially included by the cylindrical section 322 of the nozzle 306 , preferably likewise has a cylindrical section 326 and a radially outwardly directed circumferential flange 328 or flange-like projection. The cylindrical section 322 of the nozzle 306 is preferably non-releasably fastened to the cylindrical section 326 of the sleeve 324, for example by means of a press fit, by heat shrinking or the like, and the flange 328 of the sleeve 324 is connected to the pen-shaped housing. The gripping section 126 of the body 120 is fixedly connected. The ball 314 is spring-loaded by means of a frustoconical compression spring 316 , preferably axially in the direction of the outlet opening 312 of the nozzle 306 . The compression spring 316 is supported between the ball 314 and the end 330 of the cylindrical section 326 of the sleeve 324 .

In the closed state of the ball valve 320 shown in FIG. 8 , the material melted by the heating element 274 , preferably without the melting cartridge 130 , can be discharged from the discharge opening 312 of the nozzle 306 , which is hermetically closed by the ball 314 . Alternatively, the balls 314 may be supported directly on the seal 132 so that the sleeve 324 may be omitted.

FIG. 9 shows the ball valve 320 of FIG. 8 in an open state. In this case, the ball 314 is moved axially in the direction of the gripping section 126 of the housing 120 against the force of the compression spring 316 , so that the conical section 310 of the nozzle 306 is reduced in size while achieving a narrow annular gap 336 . The discharge opening 312 is released on a predetermined circumference. Through the annular gap 336 , the material of the melting cartridge 130 , which is melted or plasticized by means of the heating element 274 , as shown by the flow lines 338 , can be discharged in the direction of the workpiece (not shown here). Axial movement of the balls 314 in the direction of the gripping section 126 is achieved by the mechanical contact of the balls 314 with the workpiece surface.

In the open state of the ball valve 320 of FIG. 9 , preferably the majority of the effective opening cross-section of the discharge opening 312 (except for the annular gap 336 ) remains closed. Reliable guidance of the ball 314 and the compression spring 316 in the conical section 310 of the nozzle 306 is ensured by the compression spring 316 , which tapers frustoconically in the direction of the outlet opening 312 . At the same time, the compression spring 316 is at least largely adapted to the inner geometry of the nozzle 306 . The ratio of the diameter of the outlet opening 312 , which is not indicated for a better drawing overview, to the ball diameter D is preferably between 0.5 and 0.95. In the case where the melting material of the melting barrel 130 is hot melt adhesive, the ball diameter D is preferably about 3 mm, so that the hot melt adhesive can be reliably conveyed through the ball valve 320 regardless of its high viscosity. For other materials that can be melted or plasticized by means of the nozzle 306, such as plastics, waxes, low melting metals, metal alloys or food products, the diameter D of the balls 314 is preferably greater than 1.0 mm. If desired, the balls 314 may also be formed of an inductively heatable metal or ferromagnetic alloy having a defined Curie temperature, thereby supporting the discharge process of the molten material of the melting barrel 130 . Alternatively, the balls 314 may also be formed from preferably food grade stainless steel or from a stainless steel alloy.

Based on the ball valve 320, the coating results by means of the multipurpose melting appliance 300 can be further improved. The molten material of the melting cartridge 130 is reliably prevented from dripping from the nozzle 306 of the multipurpose melting appliance 300 . Furthermore, the ball 314 rotatably received within the nozzle 306 facilitates guiding the nozzle 306 along the workpiece surface due to the reduction in rolling resistance. In addition, the automatic feeding of the melting cartridge 130 can be realized by the ball valve 320 which opens automatically.

FIG. 10 shows another embodiment of a portable multi-purpose melting appliance 350 having a nozzle 154 and a modified heating element 370 preferably coaxially surrounding the nozzle 154, which is preferably compatible with the The apparatus 100 is used together and is constructed similarly to the multipurpose melting appliance 110 of FIG. 1 . The nozzle 154 with the discharge opening 168 can be heated to a predetermined maximum temperature by means of a heating element 370 which can be heated by the induction heating device 150 of the base station 104 for reliably melting or plasticizing the material of the melting cartridge. The selection of materials for the heating element 370 and the nozzle 154 is based on the already mentioned inductively heatable feedstocks or materials and material combinations for the nozzles and heating elements, similar to the criteria previously described in the context of the description of FIGS. 1 to 9 . conduct.

The nozzle 154 as shown has a larger diameter cylindrical section 160 , a smaller diameter cylindrical section 374 and a conical section 162 adjoining the larger diameter cylindrical section in the direction of the discharge opening 168 . As shown, the shoulder 378 extends in a circumferential direction between the larger diameter cylindrical section 160 and the smaller diameter cylindrical section 374, and the metal ring 380 is axially spaced from the shoulder 378 to The smaller diameter cylindrical section 374 is secured axially by means of a press fit. An optional sealing element 132 may be provided between the gripping section 126 of the housing 120 and the cylindrical section 160 of the nozzle 154 .

The spring element 384 , which is embodied as a disc spring, or the spring element 386 , which is embodied as a cylindrical spring, is clamped axially in the axial direction between the shoulder 378 and the metal ring 380 . The nozzle 154 and the metal ring 380 are preferably formed from the same ferromagnetic metal alloy with a suitable Curie temperature (eg, inductively heatable) so that the nozzle 154 and the metal are always maintained regardless of the predetermined maximum temperature of the nozzle 154 Press fit between rings 380 . Manufacturing tolerances can be compensated for by the spring elements 384 , 386 and (even if the heating element 370 is lifted at least partially from the cylindrical section 374 of the nozzle 154 with a smaller diameter) always ensures that the heating element 370 is at the nozzle 154 . A defined axial position on the smaller diameter section 374 of .

By moving the metal ring 380 axially over the smaller diameter cylindrical section 374 of the nozzle 154 by an adjustment distance z prior to securing the metal ring 380 to the nozzle 154 in the manufacture of the multipurpose melting appliance 350, this can be achieved The corresponding desired axial orientation of the heating element 370 with respect to the central plane 142 of the induction heating device 150 and, as a result, a precise calibration of the maximum temperature of the nozzle 154 to be specified can thus be achieved. Furthermore, compensation of manufacturing tolerances of the heating element 370 can be achieved. Furthermore, possible thermal stresses between the heating element 370 , the shoulder 378 , the press-fitted metal ring 380 and the cylindrical section 374 of the nozzle 154 of smaller diameter can be compensated by the spring elements 384 , 386 .

During the calibration process, the current temperature of the nozzle 154 when the induction heating device 150 is switched on is detected by means of a thermometer with or without contact and the axial adjustment distance z is adapted accordingly. By introducing the nozzle 154 into the receiving well 106 of the base station 104 , without the pen-shaped housing 120 , a calibration process of the predetermined maximum temperature of the multipurpose melting device 350 is achieved, which base station thus simultaneously acts as a manufacturing aid. kick in. Thus, instead of the stop 108 , for example, the upper surface 388 of the base station 104 is used to determine the defined axial position of the nozzle 154 relative to the induction heating device 150 of the receiving well 106 of the base station 104 . Instead of the base station 104 , a specially designed manufacturing aid can also be used for the calibration process of the predetermined temperature of the nozzle 154 of the multipurpose melting device 350 .

FIG. 11 shows an alternative embodiment of the heating element 370 of FIG. 10 . Here, the preferably approximately hollow-cylindrical heating element 370 has a cutout section 392 , which in the installed state points away from the nozzle 154 . The cut-out section 392 preferably has three cut-outs 398 , 400 , 402 , which are arranged uniformly spaced apart from one another on the circumferential side, which are each embodied in a substantially rectangular shape. The axial height H of the recesses 398 , 400 , 402 preferably corresponds approximately to half the axial height of the overall height H of the heating element 370 . The three cutouts 398 , 400 , 402 here, by way of example, ensure that the heating effect of the induction heating device 150 is substantially concentrated in the hollow cylindrical section 424 of the heating element 370 that is free of cutouts, near the nozzle. Furthermore, the calibration process for the predetermined maximum temperature of the heating element 370 is simplified since the cutout section 392 does not make any significant contribution to the heating of the heating element 370 . Thus, a larger axial adjustment distance (see Figure 10) first produces a relative change in the predetermined maximum temperature, which generally improves the accuracy of the calibration process. Instead of the three cutouts 398 , 400 , 402 shown here only by way of example, two or more than three cutouts can also be provided in the heating element 370 .

FIG. 12 shows a further embodiment 410 of the heating element 370 for the nozzle 154 of FIG. 10 , which likewise has three recesses 418 , 420 , 422. The cut-out section 414 of the heating element 410 points away from the nozzle 154 in the assembled state on the nozzle 154 . In contrast to the heating element 370 of FIG. 10 , the heating element 410 or the recesses 418 , 420 , 422 here respectively only have an approximately triangular or trapezoidal shape. The heating element 410 may be formed of a ferromagnetic alloy having a defined Curie temperature. Alternatively, heating element 410 may be formed of any inductively heatable metal, metal alloy, preferably food grade stainless steel or stainless steel alloy. Furthermore, the heating element 410 may also be configured as an ohmic resistance heating element. The corresponding situation applies to all heating elements according to FIGS. 1 to 11 .

FIG. 13 shows another embodiment of a portable multipurpose melting appliance 450 that is constructed similarly to the multipurpose melting appliance 110 of FIG. 1 , but with an alternative feeding device 474 that can It is applied in place of the feeding device 190 of FIG. 1 . In the region of the gripping section 126 , preferably ergonomically advantageously placed feed devices 474 for the melting cartridges, by means of which the melting cartridges can be fed by the user in a controlled manner Feed or convey in the direction of the nozzle 154 . For this purpose, the feed device 474 preferably has a rocker-type or button-type operating element 480 which cooperates with a spring element 482 , which is shown here only in dashed outline.

FIG. 14 shows the multipurpose melting device 450 of FIG. 13 , wherein the melting cartridge 130 of FIG. 1 is preferably loaded axially in the direction of the nozzle 154 by means of a compression spring 470 , as indicated by arrow 472 . The rocker-type operating element 480 of the feed device 474 is spring-elastically attached to the housing 120 by means of a spring element 482 , as shown, approximately centrally. The spring element 482 of the actuating element 480 in the form of a housing web is preferably formed integrally with the housing 120 . On the end of the rocker-type operating element 480 facing the nozzle 154 , for example, an operating surface 484 for the user is integrally formed, and on the end of the operating element 480 facing away from said operating surface, a radial direction is integrally formed, for example. Inwardly oriented cutting grip 486 having a wedge-shaped cross-sectional geometry.

In the unactuated state of the actuating element 480 , the cutting clamp 486 is spring loaded in the direction of the rotation arrow 490 , preferably due to the torsion spring action of the spring element 482 , and bites into the melting cartridge 130 on the surface. Therefore, the melting cartridge 130 is reliably fixed in position in the axial direction. By pressing the actuating surface 484 of the actuating element 480 on the user side, the melting cartridge 130 is preferably released by the cutting clamp 486 and is fed or conveyed further axially in the direction of the nozzle 154 due to the force of the compression spring 470 .

FIG. 15 shows the multipurpose melting appliance 450 of FIG. 13 with a feeding device 500 according to another embodiment, which can also be used instead of the feeding device 190 of FIG. 1 . In contrast to the embodiment of FIG. 14 , the feed device 500 has two actuating elements 506 , 508 designed as double-sided levers, which can be tilted and are supported opposite one another in the region of the gripping section 126 . on the housing 120 . In the interior space 124 of the supply section 122 , preferably axially preloadable, axially preloadable in the direction of the nozzle 154 (as indicated by arrow 472 ) by means of a compression spring (not shown here) is received in an axially advanceable manner. Melt cartridge 130. Wedge-shaped cutting clamps 510 , 512 are preferably formed on the ends of the actuating elements 506 , 508 , which are not shown for a better drawing overview, respectively. As shown, the first actuating element 506 is preloaded radially outwards by means of the first spring element 514 and the second actuating element 508 by means of the second spring element 516 , so that the cutting clamps 510 , 512 are positioned between the actuating elements 506 , 508 . In the respectively unactuated state, the surface is slightly pressed or bited into the melting cartridge. Thus, the melting cartridge 130 is axially fixed in position in a manner that does not damage its axial preload in the direction of the nozzle 154 .

By the user pressing the two lever-like operating elements 506 , 508 pointing radially inward in the direction of the arrow 518 , the cutting grips 510 , 512 and the melting cartridge 130 are disengaged, allowing the melting cartridge 130 to move autonomously towards multiple Feed in the direction of the nozzle 154 of the use melting device 450 . After the release of the two operating elements 506 , 508 on the user side, the two cutting clamps 510 , 512 are again slightly embedded in the melting cartridge 130 at the surface, so that the melting cartridge is again fixed in the current axial position, And no other materials or other raw materials are melted and can be discharged.

FIG. 16 shows the multipurpose melting appliance 450 of FIG. 13 with an alternative feeder 550 that can be used in place of the feeder 190 of FIG. 1 . The axially movable melting cartridge 130 is again preloaded axially in the direction of the nozzle 154 or in the direction of arrow 472 . The push-button actuating element 552 of the feed device 550 is preferably realized by a hinged lever 554 which is tiltably received in the bearing point 556 to the housing 120 of the multipurpose melting device 450 to a predetermined extent. . The end of the crank rod 554, which is not indicated for better drawing overview, has a cutting clamp 558 with an approximately wedge-shaped geometry. A U-shaped spring element 562 , which is preferably formed in one piece with the crank lever 554 and is supported against the housing 120 , is preferably formed on the end of the crank lever 554 facing away from this. By means of the spring element 562 , the crank lever 554 , which is not actuated by the user, is spring-loaded, preferably radially inward with respect to the longitudinal center axis 140 , so that the cutting clamp 558 is pressed or cut into the melting cartridge 130 slightly at the surface. and the melting cartridge is axially fixed in position.

If the operating element 552 is pressed radially inward by the user against the force of the U-shaped spring element 562 , the cutting clamp 558 releases the melting cartridge 130 so that the melting cartridge can be moved towards the nozzle 154 by the force of the pressure spring. Axial feed in direction. By releasing the actuating element 552 on the user's side, the cutting clamp 558 is pressed into the melting cartridge 130 again at the surface due to the force of the spring element 562, so that its axial feed is reliably stopped and no further material is aided by the nozzle. 154 is melted or plasticized.

17 shows the multipurpose melting appliance 450 of FIG. 13 with another alternative feeding device 600 that can be applied in place of the feeding device 190 of FIG. Axial preload in the direction of arrow 472 . The frame-shaped actuating element 602 of the feed device 600 preferably has an upper web 604 , a lower web 606 extending parallel to and spaced from it, and two side webs 608 , 610 extending parallel and spaced apart, preferably on the peripheral side Adjoining each other at approximately right angles and thus enclosing only by way of example quadrangular openings 612 , through which the melting cartridges 130 are guided.

The actuating element 602 is preferably acted radially outward with respect to the longitudinal center axis 140 of the multipurpose melting device 450 by means of a spring element 618 , which is embodied by way of example in the form of a cylindrical compression spring. The spring element 618 is preferably supported between the lower tab 606 of the multipurpose melting tool 450 and the housing 120 . The upper tab 604 preferably forms a control surface 614 for the user. A cutting clip 620 , which is directed in the direction of the melting cartridge 130 , is integrally formed on the lower web 606 and is embodied in the form of teeth 622 or flutes.

In the unactuated state of the actuating element 602 of the feed device 600 of FIG. 17 , the cutting gripper 620 bites slightly at the surface into the melting cartridge 130 or slightly cuts into the melting cartridge, so that the melting cartridge is axially displaced Fixed position. By pressing the operating element 602 on the user side, the cutting clamp 620 releases the melting cartridge 130 so that it can be advanced further in the direction of the nozzle 154 due to the force of the back-side pressure spring 618 . When the actuating element 602 is released again by the user, the spring element 618 presses the actuating element 602 and thus presses the cutting clamp 620 formed by the lower web 606 radially inwardly in the direction of the melting cartridge 130 . In this case, the cutting clamping element 620 is pressed back into the advancing melting cartridge 130 slightly at the surface, and the melting cartridge is thus securely fixed axially.

FIG. 18 shows another embodiment of a portable multi-purpose melting appliance 650 that is constructed similarly to the multi-purpose melting appliance 110 of FIG. In one embodiment, the feeding device may be applied in place of the feeding device 190 of FIG. 1 . In the region of the supply section 122 , a feed device 670 , which preferably operates according to the so-called “clamping feed principle”, is provided for the user and has a slider-like operating element 672 . The operating element 672 , which has a concave or rounded operating surface 674 for the user as shown, preferably has a cutting grip 678 oriented radially inward or in the direction of the melting cartridge 130 on the underside, said The cutting clamp is realized by the structure of the underside teeth 680 or the grooves. The actuating element 672 , which is designed to be slightly resilient in the radial direction, is preferably received and guided in the housing 120 in a displaceable manner parallel to the longitudinal center axis 140 by means of a guide 682 .

By feeding the actuating element 672 axially on the user side in the direction of the nozzle 154, the actuating force F acts slightly obliquely on the actuating element 672, which is fed axially and at the same time slightly radially inwards squeezed. As a result, the teeth 680 of the cutting jaws 678 bite into the melting cartridge 130 at the surface, so that the melting cartridge can be fed a short distance in the direction of the nozzle 154 by means of the actuating element 672 which is moved in the direction of the nozzle 154 . , for melting on the front side. The melting cartridge 130 can be introduced into the interior space 124 of the supply section 122 through the rear opening 690 of the end section 128 of the pen-shaped housing 120 .

A tension spring (not shown) can be provided in order to automatically pull the slider-like actuating element 672 back to the initial position shown in FIG. 18 after feeding by the user. The operating element 672 preferably springs radially outward about the longitudinal center axis 140 due to its inherent elasticity in the unactuated state, so that the teeth 680 of the cutting clamp 678 and the melting cartridge 130 slide back at the operating element 672 disengagement, wherein the melting cartridge 130 remains in the axial position achieved. In the normal operating position of the multipurpose melting apparatus 650, the longitudinal center axis 140 is inclined at an angle greater than 30° with respect to the horizontal, so that the self-weight of the melting cartridge 130 helps to maintain the axial position attained at once and maintain its In contact with the front side of the nozzle 154 . Unlike the embodiment of the feeding device of FIGS. 13 to 17 , preferably no compression springs are provided for axially feeding the melting cartridge.

FIG. 19 shows the multipurpose melting appliance 650 of FIG. 18 with an alternative feeding device 700 that can be used in place of the feeding device 190 of FIG. 1 , the multipurpose melting appliance having an operating element 702 , the The operating elements work according to the so-called "pump principle". The toggle lever 704 of the actuating element 702 preferably comprises first and second sides 706 , 708 which are connected at a hinge point 710 , wherein the semi-cylindrical actuating body 712 for the user is preferably arranged in the hinge point 710 . Preferably, the cutting clamps 718 or clamp blocks are hinged on the unshown end of the first edge 706 . The clamps 718 are axially movable within the housing 120 in longitudinal guides 722 (eg, elongated holes, etc.). The unmarked end of the second edge 708 is preferably pivotably hinged to the housing 120 at a pivot point 724 . The cutting clamp 718 preferably has a wedge-shaped or serrated projection 726 , directed radially inward with respect to the longitudinal center axis 140 or on the underside, with a cutting edge 728 and a front surface 730 and a sliding bevel 732. In this case, the sliding ramp 732 is preferably inclined such that it only opposes an axial movement of the cutting clamping element 718 in the direction of the end section 128 along the melting cartridge 130 or the melting cartridge 130 with relatively little mechanical resistance. Movement in the feed direction 734 relative to the cutting clamp 718 . The front surface 730 of the wedge-shaped protrusion 726 is preferably substantially perpendicular to the longitudinal center axis 140 and points in the direction of the nozzle 154 . Furthermore, the cutting clamp 718 is preferably loaded by means of a spring element 736 in the direction of the end section 128 of the housing 120 .

By pressing the actuating body 712 of the toggle lever 704 of the actuating element 702 , the cutting clamp 718 is first moved slightly radially inward against the force of the spring element 736 and then in the direction of the nozzle 154 . In this case, the wedge-shaped projection 726 with the cutting edge 728 and the associated front surface 730 bites into the melting cartridge 130 at the surface and feeds it axially in the direction of the nozzle 154 . Due to the vertical front surface 730 , the wedge-shaped projections 726 of the cutting jaws 718 reliably feed the melting cartridge 130 in the direction of the nozzle 154 .

If the user releases the actuating body 712 of the actuating element 702 again, the cutting clamp 718 is moved back due to the force of the spring element 736 in the direction of the end section 128 of the housing 120 , the wedge-shaped projection 726 being assisted by The sliding ramp 732 is lifted out of the melting cartridge 130, thereby retaining the melting cartridge in the occupied axial feed position. In the case of this further embodiment of the feed device 700 , it is also generally not necessary to load the melting cartridge 130 on the rear side by means of compression springs or the like.

FIG. 20 shows the multipurpose melting appliance 650 of FIG. 18 having another embodiment of a feeding device 750 that may be used in place of the feeding device 190 of FIG. 1 . The multipurpose melting device 650 has an end section 128 which, in contrast to FIGS. 18 , 19 , is provided with a releasable, rearward closing element 754 . As a further difference from FIGS. 18 and 19 , the melting cartridge 130 is axially preloaded in the direction of the nozzle 154 by means of a rear-side pressure spring 756 , wherein the pressure spring 756 is supported between the melting cartridge 130 and the closing element 754 . between.

The feed device 750 operates according to the so-called “braking principle” and preferably furthermore comprises a braking device 760 which can be actuated by the user by means of the operating element 752 . The braking device 760 preferably has a pot-shaped braking element 762 which is accommodated in the housing 120 so as to be laterally displaceable and which is radially inwards with a spring element 764 embodied as a cylindrical compression spring. Preloaded against the melting cartridge 130 . As a result, the melting cartridge 130 is loaded radially outward against the inner wall 770 of the interior space 124 , whereby the melting cartridge 130 is axially fixed against the force of the rearward compression spring 756 . The resulting inclination of the melting cartridge 130 with respect to the longitudinal center axis 140 is shown exaggerated here.

By actuating the actuating element 752 on the user's side (for example, by tilting the actuating element 752 about the pivot axis 772 , by moving it axially, etc.), the radially inwardly directed pre-elasticity of the pot-shaped braking element 762 is cancelled, or the braking element 762 is lifted slightly from the inner wall 770 and the braking device 760 is released. The frictional fit between the melting cartridge 130 and the inner wall 770 is removed, so that the melting cartridge 130 can be fed into the nozzle 154 for melting due to the force of the compression spring 756 . The axial feed of the melting cartridge 130 is stopped again by reactivating the braking device 760 on the user side.

FIG. 21 shows the multipurpose melting appliance 650 of FIG. 18 with another embodiment of a feeder 800 that can be used in place of the feeder 190 of FIG. 1 . The feeding device 800 for the multipurpose melting appliance 650 is preferably based on the so-called "jetting principle". The actuating element 802 of the feed device 800 is accordingly embodied as a preferably one-piece punch 804 , which comprises a cylindrical piston 806 , which is only by way of example, and a mushroom-shaped actuating button 808 on the end for the user. The piston 806 can preferably be introduced axially into the interior space 124 of the housing 120 through the rear opening 810 until the axial position of the piston 806 of FIG. Stick to.

By pushing the piston 806 further into the interior space 124 of the housing 120, the user can feed the melting cartridge 130 through the cylindrical interior space 124 in the direction of the nozzle 154 for continuous melting on the front side as desired The material of the barrel 130 is melted. To ensure the necessary sealing action and shock-free, slight axial movability, there is at most a slight press fit between the inner wall 814 of the interior space 124 of the housing 120 of the multipurpose melting appliance 650 and the piston 802 .

FIG. 22 shows another embodiment of a portable multipurpose melting appliance 850 constructed similarly to the multipurpose melting appliance 110 of FIG. 1 , with another embodiment of a feeder 870 that can be substituted for FIG. 1 . The feeding device 190 is applied. In the region of the supply section 122 there is preferably provided a feed device 870 with operating elements 872 acting according to the so-called "valve principle", which enables the automatic feeding of the melting cartridge 130 . The operating element 872 preferably has a slightly convex foil-like operating surface 874 for the user. Furthermore, preferably, a backside opening 880 for introducing the melting cartridge 130 is provided in the end 128 of the housing 120 . As shown, part A is marked in the area of the nozzle 154 and part B is marked in the area of the supply section 122 .

FIG. 23 shows part A of FIG. 22 , wherein the feed device 870 includes a valve unit 884 as the induction heatable nozzle 154 in the region of the gripping section 126 of the housing 120 of the multipurpose melting appliance 850 , in particular as shown. structural components. The valve housing 886 of the valve unit 884 is preferably arranged axially between the focusing nozzle section 888 having a thin tube 890 with an approximately hollow-cylindrical heating chamber 894 with a discharge opening 892 for the heating chamber. For melting or plasticizing the material of the melting barrel 130 .

Furthermore, the valve housing 886 preferably has an input channel 898 for the inflow of the material of the melting cartridge 130 that is melted or plasticized in the heating chamber 894 , and the valve housing has opening into the nozzle section 888 of the nozzle 154 . The output channel 900 is used to discharge the plasticized material of the melting barrel 130 . Preferably, a substantially cylindrical valve body 906 is movably received in a cylindrical bore 910 of the valve housing 886 transverse to the longitudinal center axis 140, the valve body having a circumferentially extending annular shape Slot 908. The valve body 906 is loaded radially outwards with respect to the longitudinal center axis 140 by means of a spring element 912 , which is preferably realized by means of a compression spring. The valve body 906 preferably forms a radially outwardly directed tappet 914 which is acted upon radially outwards by the force of the spring element 912 and forms the actuating surface 874 of the actuating element 872 .

In the state of FIG. 23, the valve unit 884 is closed because the cylindrical valve body 906 interrupts the connection between the input channel 898 and the output channel 900, so that the plasticized material of the melting barrel 130 cannot be discharged from the heating chamber 894 to the nozzle area in paragraph 888. By pressing the operating surface 874 of the operating element 872 on the user's side in the direction of the arrow 916, the valve body 906 is moved against the force of the spring element 912 until the input channel 898 and the output channel 900 coincide with the annular groove 908 and melt the Material melted within heating chamber 894 may flow into thin tube 890 having discharge opening 892 via nozzle section 888 . To open the valve unit 884 , the radial push-in of the valve body 906 is preferably carried out by means of a tappet 914 , which is actuated on its part by a membrane-like elastic actuating surface 874 as the actuating element 872 . If the user releases the operating element 872 again, the valve body 906 moves radially outwards autonomously by the force of the spring element 912 until the valve unit 884 reaches the closed position shown in FIG. 23 again.

FIG. 24 shows part B of FIG. 22 . In the region of the end section 128 , the housing 120 preferably has an approximately hollow-cylindrical outer sleeve 922 , which can be twisted about the longitudinal center axis 140 by the user, for example in the direction of the rotation arrow 920 , as shown in the figure. The inner sleeve 924 is coaxially surrounded and is temporarily connected to the inner sleeve in a rotationally fixed manner. An internal thread 930 is preferably formed on the inner sleeve 924 , which on its part interacts with a feed slide 932 , which can preferably be carried out by means of a pressure which is preferably implemented in accordance with the type of cylindrical spring. The spring 934 is preloaded axially in the direction of the supply section 122 or the nozzle (not shown here). The compression spring 934 is preferably supported between the feed slide 932 and the inner shoulder 936 of the inner wall 938 of the inner space 124 of the end section 128 of the pen-shaped housing 120 , which is only indicated in the figures. The axially freely displaceable tensioning pliers 944 , which can preferably be received at least in sections in the feed slide 932 , preferably have at least two radially inwardly directed and diagonally arranged tips 946 , which tips It can bite into the melting cartridge 130 . In particular, the internal thread 930 , the feed slide 932 , the compression spring 934 and the at least two tensioning jaws 944 with two tips 946 are further structural components of the feed device 870 of the multipurpose melting appliance 850 .

By twisting the outer sleeve 922 on the user's side (this is for example only possible in the direction of the rotation arrow 920 ), the feed slide 932 is preferably shafted in the opposite direction to the feed direction 950 of the melting cartridge 130 by means of the internal thread 930 Moves within the interior space 124 towards the ground. This rearward displacement movement of the feed slide 932 preferably takes place against the force of the compression spring 934 . Once the compression spring 934 is fully tensioned or the user releases the outer sleeve 922 again, the engagement of the feed slide 932 in the inner thread 930 of the inner sleeve 924 is again cancelled. The melting cartridge 130 can be clamped by means of axially freely movable tensioning jaws 944 engaging in sections into the feed slide 932 . The feed slide 932 is loaded in the feed direction 950 by the compression spring 934 acting against the feed slide 932 . The tensioning jaws 944 are therefore pressed into the feed slide 932 at least in sections, whereby the diameter of the tensioning jaws 944 , which is not shown for a better drawing overview, is due to the subsequent formation of the feed slide 932 . and the radially inwardly directed ends 946 of the tensioning jaws 944 bite into the melting cartridge 130 at the surface.

When a sufficient amount of molten material of the melting cartridge 130 flows out of the discharge opening 892 of the nozzle 154 by the opening of the valve unit 884, the melting cartridge 130 so clamped and the feed loaded by the fully tensioned pressure spring 934 The slides 932 are fed together in the discharge or feed direction 950 so that a corresponding axial push of the melting cartridge 130 is made possible by the force of the axially prestressed compression spring 934 of the feed device 870 . As a result, the feed device 870 thus allows the melting cartridge 130 to be fully pre-tensioned only by actuating the operating element 872 of the valve unit 884 on the user side and by fully pre-tensioning the compression spring 934 by means of the twistable outer sleeve 922 . Automatic, on-demand feeding (see especially FIG. 23, reference numerals 154, 872, 884, 892).

Claims (15)

1. A portable multipurpose melting appliance (110, 300, 350, 450, 650, 850) having at least one inductively heatable heating tip (152) for melting melts formed from dissimilar meltable materials Cartridge (130), characterized by at least one heating element (170, 264, 274, 284, 294, 296, 370, 410) connected to said heating tip (152) and/or said heating tip (152) ) can only be heated up to a predetermined maximum temperature. 2. The portable multipurpose melting appliance of claim 1, wherein at least one heating element (170, 264, 274, 284, 294, 296, 370, 410) is connected to the heating tip (152) And/or the heating tip (152) has a ferromagnetic alloy assigned a defined Curie temperature between about 75°C and 750°C. 3. The portable multipurpose melting appliance according to claim 1 or 2, characterized in that a pen-shaped housing (120) is provided with a supply section (122) for receiving at least one melt The inner space (124) of the cartridge (130) and the gripping section (126) close to the heating tip for gripping on the user's side, wherein the gripping section (126) preferably at least partially surrounds The heated tip (152) is used for thermal isolation. 4. The portable multi-melting device according to any of the preceding claims, wherein the heating tip (152) is embodied as a nozzle (154, 250, 306) having a nozzle chamber (158) and Reduced diameter discharge opening (168) for molten material of melting barrel (130). 5. The portable multipurpose melting appliance of claim 4, wherein the nozzle (154, 250, 306) is associated with an approximately hollow cylindrical, hollow frustoconical, cylindrical shell, or frustoconical shell. At least one heating element (170, 264, 274, 284, 294, 296, 370, 410) shaped and/or strip shaped is connected. 6. The portable multipurpose melting appliance of claim 4 or 5, wherein the nozzle (154, 306) has a self-closing and spring-loaded ball valve (320). 7. The portable multipurpose melting appliance according to any one of claims 4 to 6, wherein the heating element (370) of the nozzle (154) is arranged on a shoulder (378) of the nozzle (154) ) and a metal ring (380), which is fixedly connected to the nozzle (154), preferably by pressing or heat shrinking. 8. The portable multipurpose melting appliance of claim 7, wherein the heating element (370) is supported by a spring element between the shoulder (378) and the metal ring (380) ( 384 , 386 ) are spring-loaded axially in the direction of the discharge opening ( 168 ) of the nozzle ( 154 ). 9. The portable multipurpose melting appliance of claim 7 or 8, wherein the heating element (370) is in a cut-out section (392) directed away from the discharge opening (168) of the nozzle (154) ) has a plurality of rectangular, trapezoidal or V-shaped recesses ( 398 , 400 , 402 , 418 , 420 , 422 ) which are preferably uniformly spaced apart from each other on the circumferential side and which do not pass through in the axial direction. 10 . The portable multipurpose melting appliance according to claim 6 , wherein a feeding device ( 190 , 474 , 500 , 550 , 600 ) is assigned to the melting cartridge ( 130 ). 11 . , the melting barrel (130) is axially preloaded in the direction of the nozzles (154, 250, 306) by means of a pressure spring (470), and the feeding device (190, 474, 500, 550, 600) ) with at least one actuating element (192, 480, 506, 508, 552, 602, 672, 702) spring-loaded radially outwards, said actuating element having an integral cutting clamp (200, 486) , 510, 512, 558, 620, 678. 11. The portable multipurpose melting appliance according to claim 10, characterized in that the melting cartridge (130) is at least one operating element (192, 480, 506, 508, 552, 602, 672, 702) at the With the user side released, it is held axially by means of the associated cutting clips ( 200 , 486 , 510 , 512 , 558 , 620 , 678 , 718 ). 12. Portable multipurpose melting appliance according to claim 10 or 11, characterized in that the melting cartridge (130) is capable of pressing the at least one operating element (192) directed radially inwardly on the user side , 480, 506, 508, 552, 602) are released and can be fed in the direction of the nozzles (154, 250, 306) by means of the pressure spring (470). 13. An apparatus (100) having at least one portable multipurpose melting appliance (110, 300, 350, 450, 650, 850) according to any of the preceding claims and having an external base station (104) , the base station has at least one receiving well (106) with an induction heating device (150), wherein in the at least one receiving well (106) the at least one multipurpose melting appliance (110, 300, 350 , 450, 650, 850) at least one heating tip (152) can be received at least locally for induction heating by means of said induction heating device (150). 14. The apparatus (100) of claim 13, wherein the base station (104) has at least two portable multipurpose melting appliances (110, 300, 350, 450, 650, 850) each the receiving well (106). 15. The device (100) according to claim 14, characterized in that the receiving wells (106) of the base stations (104) are respectively relative to the base (106) at an angle (α) preferably between 0° and 60° 182) of the vertical line (180) is constructed obliquely.

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