DE2744914A1 - DEVICE FOR DISTRIBUTION OF NORMALLY SOLID, HEAT LIQUID MATERIAL - Google Patents

Description

Device for the distribution of

usually solid, through

Heat liquefiable material

Applicant:
PLASTITHERM LIMITED
28, Queen Anne's Gate London SWlH 9ΛΒ
England

Domestic representative according to § 16 PatG: Dipl.-Ing. Willi Schickedanz Langener Str. 70
6050 Offenbach

809819/0604

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The invention relates to a device according to the preamble of Claim 1.

In devices for distributing normally solid, through Heat liquefiable materials are typically used as hot melt adhesives or as thermoplastic adhesives Solder are known.

There are already known adhesive dispensers in which a mechanical Force or compressed air is used to move solid, heat-liquefiable materials past an electric heater to move an opening closed (GB-PSs No. 14 55 139, 14 54 971, 14 55 and 13 14 614). These known devices are all related to relatively complex and mechanically complex devices for the industrial use, but hardly usable for the do-it-yourselfer because they require electrical energy and compressed air storage as well as electrical connections.

Although there are also numerous hand-held glue guns or for the do-it-yourselfer

Handheld solder guns are available, they are too expensive built or too awkward to use. They all use a built-in electrical heating element to melt the glue or of the solder, which means that they have to be connected to the electricity network that is not always available or that batteries need to be replaced but can be very cumbersome at times. Usually some type of heating control, usually a thermostat, is also considered Safety device provided, which increases the cost. Some known devices are "one-handed"; H. they are for right handers or not equally comfortable to handle for left-handers. Other devices, e.g. B. an adhesive dispenser that can be operated with a thumb press, are specified for use with a cylindrical block of adhesive Laid out length, d. H. the block must have the normal length of the user's spread hand (GB-PS 10 99 003). These devices so cannot be used with glue chips or granules. They also need electrical heating elements to melt

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thermoplastic adhesives, which are poor conductors of heat, initially a lot of time. However, after prolonged use, such devices with integrated heating elements and a handle in the immediate vicinity of these heating elements creates an unpleasant heat build-up for the user. Another glue dispenser requires that the glue rod be toothed is so that it engages in a corresponding mechanical assembly device (GB-PS 12 52 772). This will reduce the production cost increases and limits the number of adhesives that can be used, since many of them have insufficient strength and / or considerable tack at room temperature in order to be inserted into the device in this way.

Finally, a plastic welding device is known (US-PS 25 56 609), in which a thermoplastic filler is heated in a first container by means of an integrated electrical heating element and then is pressed out by hand by means of a plunger while a second electrical heating element in a second container adjacent to the first container heats a heatable noble gas so that the filler is forced into the path of the heated gas.

The invention is based on the object of a relatively simple and To create inexpensive handheld and portable glue gun that is suitable for home use by the DIY enthusiast. These Glue gun should also be particularly suitable for distributing or spraying adhesives that are in the form at room temperature of blocks or granules are solid and which liquefy when exposed to heat, and it should preferably be replaced with easily exchangeable, Commercially available gas cartridges, such as those used for lighters, have to be equipped.

This object is achieved according to the invention according to the characterizing part of the claim solved.

The invention consists essentially in the fact that a device

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for the distribution of normally solid, heat-liquefiable Materials are provided that have a device for receiving or releasably connecting a gas container, as well as a container, which consists of a material that conducts heat well and which is intended to accommodate the normally solid material, and also a chamber which occupies part of said container and serves to melt said normally solid material, furthermore a dispensing cannula, which is in communication with the mentioned chamber and discharges the molten material, further a pressure device which is located in and move relative to the container and forcing the normally solid material into said chamber, said chamber Device with one of the mentioned containers and one of the mentioned Pressure devices are connected, furthermore a gas burner which can be connected to the fuel container and which has a flame outlet, further actuating means so that the container and the printing device can be moved relative to one another, as well as means to the To direct the burner so that its flame outlet is outside and in the vicinity of the mentioned part of the container.

The means for aligning the burner preferably exist from a movable arm, which causes the burner and the container between a rest position in which the burner is removed from the combustion chamber removed, and a working position in which the burner with its flame outlet is outside and close to the melting chamber, can move.

In an advantageous embodiment of the invention, the burner rotatably mounted on an arm attached to the device and extending sideways from it, thereby enabling it to move the burner rotates about a vertical axis parallel to or coincident with the vertical axis of symmetry of said container.

When using commercially available cartridges for gas lighters, it is required that they be pierced and provided with a valve.

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27AA9U

In addition, the burner is preferably secured with suitable fasteners Sealants are provided so that it can be used with the interior the cartridge is in communication to allow gas flow, while a gas-tight seal is attached to the holder remains.

The device can be by any suitable and known, simple and quick-release fastening connected to the bottom of the gas container and held in the rest position by a spring.

During use, the device is connected to the gas cartridge _#, and it is located the container in the device, wherein the container with adhesive is filled. The flame is then ignited and the burner is brought into a position adjacent to the container. Then the user takes the cartridge and the operating handle and squeezes both together, much like pulling the trigger of a rifle, so that the flame of the burner is immediately on the outer wall of the part of the container which is divided as a chamber around the inside to melt the adhesive.

In certain more complicated forms of application, the device can still have means by means of which the hydraulic pressure of the molten Adhesive can be determined, the determined pressure then serving as a control pressure to the burner nozzle accordingly to regulate.

The exterior of the container can be ribbed to aid cooling speed after removing the flame to accelerate.

The advantage achieved with the invention consists in particular in that a dispenser for normally solid, heat-liquefiable Materials is available that works in conjunction with a container (e.g. rifle, cartridge, etc.), which container is associated with an im Commercially available flammable gas filled, such as the small butane gas cartridges for lighters.

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8 274Α9Ί4

Two embodiments of the invention are shown in the drawing and are described in more detail below. Show it:

Fig. 1 shows a device according to the invention, in the adhesive container and gas cartridge are fixedly connected to one another; Fig. 2 shows a device according to the invention, in the adhesive container and gas cartridges are movable relative to one another.

Referring to the drawings, like parts have like reference numerals have a commercially available gas container, i. H. a butane cartridge, used as a heat source to liquefy normally solid thermoplastic adhesives.

In Fig. 1 is a conventional butane gas container 10, as it is for Lighters are on the market, at its bottom with a snow-releasing and spring-loaded version 11, z. B. a snap ring connected, which in turn is extended to the lower end of a Support rod 12 is connected. The upper end of the support rod 12 ends in a fork joint which is in an annular recess 13 in the Container 14 engages a dispensing device, which is generally designated. A central part of the support rod 12 has one end a J-shaped bent operating lever 15 connected, the other The end is connected to a pressure piston 16. The actuating lever 15 can be a leaf spring. The plunger 16 in the container 14 is designed to slide back and forth snugly with the assistance of sealants not included in the Fig. 1 are shown.

The container 14 is made of metal or some other good heat conductor and is essentially a cylindrical, round component which ends in a conical taper in the form of a nozzle-shaped outlet opening 17. The interior of the container 14 is cylindrical and hollow and open at the rear to allow the container to be loaded with a heat-melting charge of glue, no matter whether it is a block, a rod or a granulate

809819/06 (H.

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delt. That part of the container 14 which is adjacent to the outlet opening 17 forms a melting chamber 18.

The support rod 12 carries a laterally extending arm 20, at the free end of a downwardly directed vertical axis 21 is attached. A burner set 22 is arranged on the axis 21 and can rotate about the vertical axis 21 in the horizontal plane. The kit 22 contains a gas valve in a housing 23, which can be adjusted by means of a flame regulator screw 24 can, further a burner arm 25, which leads away from the housing 23, a burner outlet opening 26 and an adjusting lever 27, which with the housing 23 is connected, whereby it is possible that the Burner 26 can be rotated about the axis 21, between a rest position in which it is removed from the device 30, and a working position in which the flame is directed from the burner against the outer wall of the melting chamber 18 during operation. A suitable one is located between the housing 23 and the container 10 Fastening / sealing, which is not shown in detail.

If the device is in use, the burner will, after assembly, be the Charge and the ignition of the device pivoted into its working position, the setting of which is supported by a stop, not shown can be. Then the container 10 is gripped with the four fingers of one hand and the stop lever 15 with the thumb of the same hand withdrawn so that the plunger 16 pushes the solid adhesive into the melting chamber 18.

As you can see, the rear part of the still solid adhesive works, which is pushed forward by the plunger 16 as a piston to transmit the pressure from the plunger 16, thereby liquefied Adhesive is conveyed to the outlet opening 17.

If the operation of the device is to be interrupted, the Trigger stopped and the burner swiveled into its rest position and extinguished.

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274491A

Referring to FIG. 2, those parts will now be described which are differ from the embodiment shown in FIG. Here is the device 11 with one end of an elongated operating lever 15 connected, the other end of which is connected directly to the pressure piston 16. The plunger 16 is designed to be good slides appropriately in the container 14 using sealing means 28 which are only indicated schematically in FIG.

The underside of the container 14 is provided with a counter bearing 29,

to prevent the canister from moving towards the torch assembly. To operate the device, after having loaded the container 14 and lit the burner 26, the user simply has to grab the container 10 and the operating lever 15 and pull the lever 15 from left to right, as indicated by a dashed line Arrow in Fig. 2 is shown. As a result, the lever around the device 11, for. B. a bracket, pivoted until the counter bearing 29 engages in the housing 23. In this position, the chamber 18 is located directly above the burner flame. During this movement the pressure piston 16 does not move relative to the container If the lever 15 continues to be pulled in the same direction, the plunger 16 slides to the right into the container 14 in order to convey the molten adhesive mass into the outlet opening and the To distribute mass. The distribution process can be stopped practically on the spot by releasing the lever 15, which by means of the resilient connection 11 causes the pressure piston 16 first slides in the container 14 to the left and then both the The plunger and the container are removed from the flame.

It should be noted that in both embodiments of the invention Heating a good conductor of heat with gas results in rapid heat transfer and rapid melting, while vice versa an interruption of the heating process a rapid cooling down and causes a non-drip delivery of the adhesive.

The loading of the container is done simply by the fact that the pressure

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27U9U

piston is removed or fully withdrawn.

In a further embodiment not shown in the drawing According to the invention, the pistol 30 can be equipped with a part dimensioned so that it has a cartridge or fuel space which is filled with a cartridge in the same way as v / ie lighters for smokers. With this configuration the pistol could be equipped with two / one containers, one container serving to hold the adhesive, as it is in the embodiments described above is explained, and wherein the second container can accommodate the burner. The Brenner can do anything have a suitable construction for this.

In another embodiment, also not shown, there are there is no movement of the burner and the container towards each other. The means to fasten the burner on the fuel cartridge make sure that the burner is arranged below the melting chamber is. The beginning and end of the distribution process v / ground alone controlled by igniting or extinguishing the flame.

809819/0604

Claims (6)

2 7 4 4 claims 1. Apparatus for the distribution of normally solid, heat-liquefiable.1 material, which has a container with an inlet opening for the normally solid material, which also has a melting chamber in the container which is in communication with the mentioned inlet opening also includes a dispensing device in communication with said melting chamber for conveying out the molten material, further comprising pusher means moving in and relative to said container to push the normally solid material into the melting chamber, which ultimately is actuating means which cause the container and the pressure generating means to be moved relative to one another, characterized in that the material is melted by the flame of a gas burner (26) which can be connected to a fuel container (10), this device being connected to one of the Container (14), one of the pistons ( 16) and means (27, 29) for aligning the burner (26) is arranged outside and in the vicinity of the melting chamber (18), said container (14) being made of a material of good thermal conductivity. 2. Apparatus according to claim 1, characterized in that the means for aligning the burner (26) is a movable arm (27) which causes the burner (26) and the container (14) to be moved relative to one another, namely between a rest position in which the burner (26) is removed from the melting chamber (18) and a working position in which the burner (26) is arranged with its flame outlet opening outside and in the vicinity of the melting chamber (18). -2- 809819/0604 3. Device according to claims 1 or 2, characterized in that a spring lever arm (15) is provided as the actuating means, which connects the device (11, 12) with a sliding means designed as a piston (16). 4. Device according to one of the preceding claims, characterized in that the burner (26) is rotatably mounted on an arm (20), wherein it extends laterally from the device (11, 12) and is attached to this so that the burner (26) can rotate about the vertical axis (21) during normal use. 5. The device according to claim 1, characterized in that the actuating means (15) is physically operable to move the container (14) and the piston (16) without relative movement to each other from the mentioned rest position to the mentioned working position, with a further Actuation causes the piston (16) moves into the combustion chamber (18) relative to the container (14), around the molten material into the exit opening (17) to press. 6. Apparatus according to claim 5, characterized in that an adjustment abutment (29) is provided on the container (14) as adjusting means for the burner, which engages in a part (23) of the burner (16) to the melting chamber (18) to be adjusted above the flame outlet opening of the burner (26). -3- 809819/0604