Apparatus for extruding a fillet.

MEMORY

-1 There are occasions in various trades in which it is desired to form a string of pulp material between two surface joints, which may be the parts of a surface, for example regions limiting a crack in a surface, or parts of adjacent or coincident separate surfaces. .

By "cord" is meant an elongated filler between the surface parts which may be coplanar, parallel and spaced, or inclined at any angle and which may be joined or have pointed edges. The cord can be formed, in ·. · Between the edges of the surface parts or superimposed on a marginal region of one or both. The most commonly used materials used to produce these cords are formulated to harden into a solid or quasi-solid state some time after their application, but the invention does not remain limited to the use of such materials. The "cords" in question tend to have a simply didactic function, but sometimes they are necessary to form a "magnetic" closure between superficial parts and sometimes they can exert a mechanical function, for example to distribute the superficial parts to maintain a correct relationship. An example is the formation of a sealing bead between the wall of a room, for example a kitchen or bathroom, and a surface of an appliance or the edge of a sink, laundry or bathroom, butted against a wall, for prevent water from flowing between the sink, etc, and the wall and to hide and improve the appearance of the joint. Several manufacturers have produced sealing materials for this purpose in the form of pastes contained in adhesive tubes or cartridges from which the materials can be exempted. However, the difficulty of the user of such a 6-tube tube has been generally recognized. for example, to distribute the surface parts to maintain a correct relationship. An example is the formation of a sealing bead between the wall of a room, for example a kitchen or bathroom, and a surface of an appliance or the edge of a sink, laundry or bathroom, butted against a wall, for prevent water from flowing between the sink, etc, and the wall and to hide and improve the appearance of the joint. Several manufacturers have produced sealing materials for this purpose in the form of pastes contained in adhesive tubes or cartridges from which the materials can be exempted. However, the difficulty of the user of such a 6-tube tube has been generally recognized. for example, to distribute the surface parts to maintain a correct relationship. An example is the formation of a sealing bead between the wall of a room, for example a kitchen or bathroom, and a surface of an appliance or the edge of a sink, laundry or bathroom, butted against a wall, for prevent water from flowing between the sink, etc, and the wall and to hide and improve the appearance of the joint. Several manufacturers have produced sealing materials for this purpose in the form of pastes contained in adhesive tubes or cartridges from which the materials can be exempted. However, the difficulty of the user of such a 6-tube tube has been generally recognized. for example a kitchen or bathroom, and a surface of an appliance or the edge of a sink, laundry or bathroom, butt against a wall, to prevent water from flowing between the sink, etc, and the wall and to hide and improve the appearance of the union. Several manufacturers have produced sealing materials for this purpose in the form of pastes contained in adhesive tubes or cartridges from which the materials can be exempted. However, the difficulty of the user of such a 6-tube tube has been generally recognized. for example a kitchen or bathroom, and a surface of an appliance or the edge of a sink, laundry or bathroom, butt against a wall, to prevent water from flowing between the sink, etc, and the wall and to hide and improve the appearance of the union. Several manufacturers have produced sealing materials for this purpose in the form of pastes contained in adhesive tubes or cartridges from which the materials can be exempted. However, the difficulty of the user of such a 6-tube tube has been generally recognized. Several manufacturers have produced sealing materials for this purpose in the form of pastes contained in adhesive tubes or cartridges from which the materials can be exempted. However, the difficulty of the user of such a 6-tube tube has been generally recognized. Several manufacturers have produced sealing materials for this purpose in the form of pastes contained in adhesive tubes or cartridges from which the materials can be exempted. However, the difficulty of the user of such a 6-tube tube has been generally recognized.

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-2- cho, particularly the man of your house or the enthusiast of the bricolage who may not have experience, to produce a cord that forms a hermetic seal against the two surfaces and presents an ultra and attractive appearance.

A common practice, in forming the pasty material cords, is to bring the nozzle of the extrusion apparatus along the junction between the surfaces approximately in the opposite direction to the flow direction of the pasty material passing through the orifice of the former. nozzle. The material, ex ·. · Brought simply deposited in the union while the nozzle is brought back more or less at the same speed ..

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· · · With which the cord extracted from pasty material leaves the nozzle. The shape of the bead is determined by the • · · · shape of the nozzle hole and the surfaces adjacent to • ··.

· the Union. However, it is difficult to maintain by hand the necessary force against the nozzle and the two surfaces * and the uniform speeds of nozzle movement and the extrusion of pasty material necessary to produce a section cord. constant cross Any lateral movement of the nozzle produces transverse nerves in the cord. Furthermore, simply depositing the cord in the joint in this way, it is difficult to be sure of getting a full contact of the cord with both surfaces, as is necessary if the seal is the main object. If the cord does not adhere safely, it may move later.

A higher quality bead, pressed against the surfaces and therefore adhered with greater security, can be obtained by bringing the nozzle forward in the same direction as the extrusion of the material, while pressing against both surfaces next to the joint. With a mouthpiece of /

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Normal circular cross section, this cord has a concave outer surface defined in cross section by> the outer edge of the nozzle. However, considerable experience is needed to regulate the extrusion of the material, pasty and move the extrusion nozzle to maintain an adequate amount of extruded material in front of the nozzle to form the condom, but not in such an amount as the matte. Rial flows on the surface outside of the joint points of the nozzle rim and surfaces. The latter will occur * ·. · Frequently when an inexperienced person tries to perform this operation, oroducing an unpresentable result.

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The pasty material that has flowed on the surface presents great difficulties if you try to eliminate it without disturbing the cord. The invention makes it possible to obtain a cord of higher quality • · · »more easily.

• • • • often pasty material to form it. *

cord is applied using a mass of material by hand ό, τησ-τ through the. use of manual tools. An example is the tile grout, whose usual method is to work the pasty material of the grout in the separation spaces between the tiles using a sponge or cloth and then compressing it in the thick of separation with a tool. trecha. The grout material remaining on the surface of the tiles has to be removed later, which neccesarily limits the kinds of materials that can be used to cover the joints, since any material that has a tendency to adhere strongly to the Tile surface can not be removed later with ease. Therefore,

-4baldoses and do not contribute significantly to the general solides of the tiled or tiled surface. In addition, the appearance of a grout-tiled surface depends to a considerable degree on the skill of the person applying the grouting material and frequently is unsatisfactory or unpleasant.

For example, the application of pasty material by hand, to form a cord, is the glazing of windows. .Trk traditionally the putty is worked by hand in the recess d'el * •

the window frame and against the margins of the glass and is then compressed and smoothed at an angle of approximately 45 ° with the surface of the glass by means of the use of a caulking spatula. Although an expert glazier can perform this operation in a short period of time.

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get a neat result, less expert operations *.

• · · As DIY enthusiasts, they find it a slow and difficult "t * a • • • • • •. In addition, due to the need to remove excess putty from the glass and parts of the window frame that are not recessed, it is not convenient to use fillers that have strong adhesive characteristics. Therefore, after a period of service, the putty is usually separated from the glass and / or the frame of the window, admitting water that promotes the development of algae, putrefaction of the frame or, when frosts occur, they can break the crystal or leave the putty.of the recess.

This invention relates to an apparatus for extruding pasty materials and forming cords, which have application not only in those circumstances in which the method commonly employed is extrusion, but also in certain circumstances in which the pasty material is usually applied

-5th hand using manual tools and a dough.

Due to the restrictions that have been mentioned, and to similar restrictions in other circumstances, various pasty materials having sides that would make them convenient if they could be used to form cords between parts of surfaces have not been used prior to this invention except, perhaps by expert operators and in particular circumstances. For example, the putties used to glaze, as mentioned, usually have · .poea

· · Adhesion to the glass or to the materials used in the window frames, zero pasty materials are available "· · · • •. · I that can adhere strongly to such surfaces present a great resistance to the action of water. If an intruder • • • breaks a window glazed in a traditional way, the • ··.

fragments of the broken glass are usually easily removed from the window because they are not held by the mask. The present invention allows the use of abrasive fillers that maintain the fragments of the glass. in its place after having broken the window and make the intrusion in a building much more difficult than when traditional putties are used.

Two separation spaces between two-leaf doors or windows and their frames have been filled in to avoid air corners or for fire protection purposes by applying a pasty material to the frame with the door or window open and then closing the door or Ten-I tana. and allowing the pasty material to harden. By this method it is difficult to be sure that the spaces of se-!

I between the door or window and the frame, which usually have a variable width, fill completely. When the separation space is narrow, the excess material is \

-6prime when closing the door or window and has to be removed, but when the space of separation is large it may be that the amount of material applied is inadequate so that a hermetic seal is not achieved. The present invention allows the formation of sealing cords with a closed door or window and without waste of material. According to this invention, the apparatus for applying a pasty material and forming a bead in a region between two parts of surfaces comprises guide means, dd, which are used in conjunction with an extrusion nozzle directed towards the said region and located adjacent thereto and moving along said region while extruded. * &lt;31 • · ..

pasty material through the nozzle, the guiding means comprising a rubbing part to be brought into contact with uqa • • • of the parts of the surfaces, adjacent to the region of «« '· .. · tion, and excluding the material dough extruded an excess and a part of cord formation on the region of application to form the desired cord with the extruded pasty material.

The guide means preferably comprise rubbing portions to contact both parts of the surfaces adjacent to the region of application. The rubbing parts can make a line or surface contact with the parts of the respective surfaces, as they are placed. The parts of the surfaces can be edges of surfaces.

The guide means preferably form an integral part of the extrusion die, for example an integral molding in plastic material, but they can be formed by being stopped and then mounted on the nozzle. For use with a collapsible tube or other extruder equipped with a nozzle, the extrusion nozzle and the guide means may be

-7 molded forming an integral part with a tubular part that fits snugly in the nozzle of the extrusion device and can be automatically retained.

The rubbing part or parts will preferably be flexible so that they can flex in intimate contact with the part or parts of the surfaces.

It is known that extrusion nozzles can be enabled with guide means to help place them in relation to the surfaces on which or between which the pasty material is to be built.

The British patent specification 27,222 of 1.10o, • · * describes a collapsible tuba for liquid or semi-liquid material in which the discharge end of the tube or a cap mounted on the discharge end has a cavity with a septum * which is It can perforate to form a nozzle and a projection ·, · · · · · · · · mainly on one side of the cavity. 31 projection has groove urn aligned with one side of the cavity, forming uh. channel for the material squeezed from the nozzle and ending on a sloping or chamfered face at whose ends there are lugs or cursors having curved edges and projecting slightly above the chamfered face. When the tube is inverted and applied to a surface on which it is desired to deposit the contents of the tube, the cursors rest on the surface and keep the chamfered face slightly separated from the surface. When pressure is applied to the tube to force a binder from its contents through the outlet orifice, the binder is placed on the surface and extends across the chamfered face. The cursors that rest on the surface limit the dispersion of the current and cause them to be deposited in a thin strip or tape of uniform width with edges pe

-8ffectively defined. The shape of the cursors makes it possible to raise or lower the chamfered face in relation to the surface by varying the inclination of the tube, thereby varying the thickness of the strip or tape.

In the embodiment described in the British patent, cited the cursors are very small and make a tangential contact with the surface on short side lines practically in line with the point at which the stream of the extruded material joins the surface. Its effect of confinement * n * · · t on the current is scarce and if excess material is extruded from the tube, it will easily flow out of the curscre

*. · '· · · And falling on the surface.

The US patent specification 3 · 133-300 * * · "describes the deformation of a cap of a collapsible tube that is used as an applicator of the extruded material from Je'L * · · tube. The cap includes a nozzle and extrusion is not used. The material is extruded from the normal nozzle of the tube after the cap has been removed. The cap is then placed back to be used as an applicator, the tube then being used as a handle. The cap has four sheets with different shapes to help the user form ribbons of the extruded material with a different texture and width.

US Patent Specification 3,594-089 discloses an applicator nozzle for a flexible bottle containing a fluid sealant for joining the edges of the sheets of floor covering material. The applicator nozzle has a narrow-shaped configuration next to its end

I with four fins placed perpendicularly and extending longitudinally, each with the same size and shape. In practice, a fin directed downwards is inserted i

-9between the edges joined to the top of two plates that have to be joined, thus opening a gap between them. The two adjacent fins are on the surface. of the two plates, controlling the depth with which the first fin penetrates the separation space. The sealant fluid is sprung from the bottle by squeezing it and the bottle is drawn back, ie, in the opposite direction to the flow of sealant fluid through the nozzle along the junction of •

the songs attached to the top. The squeezed sealing fluid thus permeates the open gap as it flows along the margins of the two plates next to the spacing apart. The gap is progressively closed as the nozzle is passed along it. The degree to which the sealing fluid flows over the margins of the surfaces and the shape and thickness of the tape or cord of the so-formed cord is determined only by the shape of the cord. •

nozzle, the flowability of the fluid sealant and the quantity expired from the bottle in relation to the speed with which it moves. It will be easy to see that if too much fluid is squeezed out, it will flow out of the margins of the plate on its surfaces or, if it has a higher viscosity, it will remain as a raised rib over the closed space, probably with an irregular height if they have not. uniformly controlled the compression and movement of the bottle.

Contrasting with these previous discoveries, the invention offers an apparatus with which an inexperienced person can easily produce a neat and uniform cord, whose shape is effectively defined by the cord forming part that, passing over the application region, effectively presents a lace forming opening. I

In the attached drawings, the invention is illustrated only by way of example, wherein:

Figure 1 is a perspective view of a nozzle and guide means for extruding a cord between surfaces practically at right angles.

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Figure 2 is a front view. ....

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Figure 3 is a side view.

Figure 4 is a schematic perspective view illustrating parts of two intersecting surfaces * and illustrates the use of the nozzle and guide means illustrated in Figures 1 to 3.

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The nozzle and guiding means illustrated * in • • • • • • Figures 1 to 4, are molded integrally, using • • • • a resilient flexible plastic material and designed to be adaptable to a collapsible tube or another device for extruding pasty material. The nozzle 1 is a conical tube having at its widest end a bushing 2 to adapt to the extrusion device and its narrow end 3 forms the extrusion orifice. The guide means molded integrally with the nozzle comprises a pair of fin-like rubbing elements 4 extending from opposite sides of the narrow end 3 of the nozzle where they are joined to a collar 5 which extends around the perimeter of the nozzle between them. The'

Fig. 4 illustrates the mouthpiece 1 mounted on the front of a collapsible tube 9 containing the pasty material, to form in practice a cord of the material between a tiled wall 10 and another surface 11, joining at an angle straight at the junction 12. The nozzle 1 is directed towards the junction 12 • · or * · · · · at an angle of approximately 45 to the joint and to the surface 10 • · and 11 and positioned so that the outer rubbing edges of the rubbing elements of the guide means make contact with the respective surface 10 and 11. A slight pressure is applied as necessary so that the fin elements 4 flex so that their edges 7 make a line contact • · · .

"With the surfaces practically the entire length of the * •" • • • • • • edges. The pasty material is squeezed out of the tube to form * 'an or · · «♦

reservoir 13 of the material in the region of the junction, immediately in front of the nozzle 1 and between the finning-like rubbing elements 4. The nozzle is then brought forward, in the direction of the arrow A, along the the union while continuing to squeeze material from the tube 9 and maintaining the slight pressure against the surfaces 10 and 11. The extruded pasty material passes from the reservoir 13 through the forming opening defined between the surface by the forming edge 8 of the collar 5 the union between them. The material is then firmly compressed in contact with the surfaces and forms a clean bead 14 with a concave outer surface with 7 formed by the forming edge 8. The line contact of the can

Rubbing with the surfaces 7 avoids the pasty materialial escape from the formed tank, keeping edges perfectly defined with the bow 14 and keeping the adjacent pairs of the surfaces 10 and 11 clean.

The cross section of the cord 14 can be re.

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guide within certain limits by varying the angle between the axis of the nozzle and the union 12.

With this simple device an inexperienced user can produce a neat cord with very little practice.

The cord, compressed in contact with both surfaces, will

a good seal between them as well as an attractive appearance of the union. ^σ·· '

The invention is not restricted to fashion • •_β illustrative nature that has been described. Guiding means can be produced with rubbing portions and formation of various configurations to form cords with the desired shapes p * a * fa * * * particular circumstances.

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Having sufficiently described the nature of the event, as well as the manner in which it is carried out in practice, it should be noted that the aforementioned provisions are susceptible to modifications of detail insofar as they do not alter its fundamental principle.

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