MXPA99006452A - Device for protecting a large-volume receptacle and method for the production thereof - Google Patents

Abstract

The invention relates to a device for protection of a large-volume receptacle during storage and transport of liquid, semiliquid, viscous, powdered and granular filling materials, consisting of a pallet-like support member which supports the receptacle on the underside, and a casing member connected (8) to the support member (7) and laterally enclosing the receptacle. In order to make such a device, which is easy and cheap to produce, is largely chemically rust-free and in which there is no danger that the casing element can detach itself from the support element, while having good optical appearance and affording a better protection of the receptacle, the support members and the casing members are formed from a single piece made of synthetic material with a three layer wall consisting of a compact outer layer (11), a compact inner layer and a foamed intermediate layer (13).

Description

DEVICE TO PROTECT A LARGE VOLUME CONTAINER AND METHOD FOR THE MANUFACTURE OF THE SAME DESCRIPTION OF THE INVENTION: The invention relates to a device for the protection of a large volume container during the storage and transportation of liquid, viscous, powder and granular fillers, consisting of a shaped carrier body. of pallet, which supports the container on the underside and a box body joined to the carrier body and which surrounds the container laterally, as well as to a process for its manufacture. For the transportation and storage of liquid, viscous, powder and granular materials, large volume containers are used, which generally have a filling volume of 500 to 1000 liters and which are produced from synthetic material. a blowing procedure. Thus, these containers have a lockable inlet opening, while in the area of the floor there is an exit opening with a locking armature. In order to be able to transport and store such containers without damage, the same is supported with its rectangular base surface on a carrier body in the form of a pallet made of wood, metal or synthetic material, on which a laterally surrounding box body is placed. made of vertical and horizontal bars welded together. A metal box body is especially REF .: 30713 in the chemical industry and in the field of the food industry disadvantageous and therefore undesirable, Such pallet container can be considered as the device formed by the carrier body and the body of box or shirt as disadvantageous, because on the one hand its manufacture is complicated and on the other hand there is always the danger that the box body can be released from the carrier body. Furthermore, damage to the container by the sleeve body can not be completely eliminated. Therefore, the present invention proposes the task of creating a device for the protection of a large-volume container for storing and transporting, filling material, liquid, viscous, in the form of powder or grain, which is easily manufactured and at a good price, which is also chemically free of corrosion and does not present the danger, of being able to be released from the body of the carrier body. In addition the device must present a good optical appearance and give a better protection to the container. In order to solve this task according to the invention, it is proposed in a device of the aforementioned type that the carrying body and the body of the sleeve or box form a single piece made of synthetic material with a three-layer coating consisting of of a compact outer layer, a compact inner layer and an intermediate layer of foam, which form a wall.

Such a device can be manufactured quickly and inexpensively. It offers the container there a particularly high security and has a good appearance. The danger of the sleeve body separating from the carrier body does not exist. The weight of such a device is relatively low. Other features of the device according to the invention as well as the method for its manufacture are indicated in claims 2-10. The invention will now be described in detail in an exemplary embodiment shown in the drawings, where: Figure 1 shows a presentation in cutting of a device according to the invention with a container placed; Figures 2 to 9 show an arrangement for manufacturing the device of Figure 1 in the individual steps of the process; Figure 10a a section through the wall of the device of Figure 1; Figures 10b and 10c the conformation of different thicknesses of the wall layers of a hose-shaped formation; Figures 10 and 10 show the wall of a device from the previous formation of Figures 10b and 10 c. Figure 10 shows a section through the wall of the device of Figure 1 in the area of an observation strip. In Figure 1 a pallet container 1 is shown, which on the one hand consists of a container 2 made of synthetic material, which receives a liquid, viscous filling material, in the form of powder or grain. This container 2 is provided with a lockable filling opening 3 which is only indicated, which is in the upper area of the container 2. In its lower region the container 2 has a drain opening 4, in which a valve is placed. 5. The container 2 is now placed in a device according to the invention 6,. which ensures good transport and storage. This device 6 consists of a carrier body 7 in the form of a vane, on which the container 2 rests. In the carrier body 7, a casing body made in one piece is joined to it 8, which surrounds the container laterally. By means of special cap elements, which are not shown very closely in FIG. 1 and by means of a connecting arc 9 only indicated in the upper region of the wall 10 of the sleeve body 8, they stop, leaving the container 2 secured in the device 6. The wall 10 of the sleeve body 8 but also the wall of the carrier body 7 are constructed in three layers and consist of a compact outer layer 11 made of a synthetic material of one color and resistant to UV radiation (Fig. 10a). Furthermore, the wall 10 of the sleeve body 8 and the carrier body 7 have an equally compact inner layer 12 made of synthetic material and at a certain distance from the outer layer 11, which for example can be made transparent. Here the inner layer 12 is separated from the outer layer 11 by an intermediate layer 13, which consists of foam material. With this intermediate layer 13 an extremely stable device 6 with a relatively low weight is achieved. In the illustrated embodiment, the sleeve body 8 has an opening 14, through which the blocking valve 5 protrudes, so that emptying of the container is possible without problems. Furthermore, the outer surface of the sleeve body 2, as indicated in FIG. 1, can be provided with internal and external patterns 15. The intermediate layer formed with foam material 13 can, if necessary, have a different density in different areas, what can be achieved without problems in the manufacture of the device 6 or of the pre-molding. Here, it is only necessary to extrude the individual layers 11, 12, 13 with different thicknesses. As the material for the device 6, for example, a compact polyethylene and provided with a foaming agent can be used. The device 6 explained by means of Figure 6 is manufactured by an installation, which is represented in Figures 2 to 9 in a simple manner and in different steps of its operation. This installation, which is arranged below an extruder, consists first of a mold 20 (Figure 9) which is formed of mold halves 20a, 20b and a mold core 231. Here each mold half 20a, 20b is taken by a mold carrier 22a, 22b, which in a manner known per se by means of an impeller (not shown) are movable or displaceable in the direction of the arrow 23 from its position in FIG. 2 to the position shown in FIG. 8. The mold core 21 is below the plane of movement of the mold halves 20a, 20 b and can be lifted by an impeller 24 from its location in Figure 2 to the position in Figure 7. Each mold half 20a, 20b it has a removable or openable upper part 25 (FIG 20 and two laterally mountable parts 26 (Fig. 3) which are drawn here in their starting position.) By means of a known impeller, which is not shown, both parts can be higher 25 as well as the p lateral gears 26 are pivoted in their positions of FIGS. 8 and 9. At the four corners of an approximately rectangular cross-section presenting the molding core 21, a corresponding extension element 27 is provided., which each time complements the cross section of the molding core 21, but nevertheless they are independently movable. Each extension element 27 is carried by a tilting lever 28, which is pivotable below the molding core 21 around an axis 29. As Figure 3 shows, two neighboring levers 28 with their expansion elements are coordinated each time. 27 of a common tilt axis 29. For the movement of the tilt lever 28 and thus of the expansion elements 27, impellers are used, known per se but not shown in the drawings, by means of which the tilt levers 28 and with this the expansion elements 17 can be moved from their starting position in Figure 3 to the position according to Figure 5 and likewise back off. Additionally, it is coordinated to each axis 29, around which tilting levers 29 can be tilted each time, a lifting impeller 30, by means of which the tilting levers 29 and thereby the extension elements 27 can be lifted from their position. in Figure 2 to that of Figure 4. The lifting impellers 30 and 24 are placed, for example, in a recess 31 of a foundation 32. Finally, two tightening elements 33 are located above the mold 20, which by means of impellers not shown are tilted from their position in Figure 2 to the position in Figure 6. The pivot axes of these tightening elements 33 are not shown in the drawings. In the manufacture of a device 6 according to the invention, it is now starting, that all the parts of the installation take the position represented in Figures 2 and 3. Now, first of all, the four extension elements 27 are lifted by their impellers. lifting 30 from its position in Figure 2 and just as much, that they are between the two mold halves 20a, 29b as can be recognized by Figure 4. This means that the extension elements 27 leave their position next to the mold core 21, which retains its inferior position (Figure 4). As soon as the extension elements 27 carried by the tilting levers 28 remain above the mold core 21 at the height indicated in Figure 4, their impellers are connected and with this the extension elements 27 are tilted against each other so much that , they reach the recognizable position clearly in Figure 5. The extension elements 27 in this position have also been drawn in Figure 4. Now, a hose-shaped premolding 34 is supplied to the installation from above, thus from the aforementioned extruder, which in the presented embodiment has a circular ring-shaped cross-section, as can be seen from Figure 5. This pre-molded 34 already has a wall 10 composed of three layers, as already explained in relation to Figure la. The premolded 34 also already has an outer layer 11 and an inner layer 12 made of a compact synthetic material, where the synthetic material of these two layers 11 and 12 can be the same or different. It is advantageous for the outer layer a synthetic material of a single color resistant to UV radiation, for example polyethylene, while the inner layer 12 is made of a colorless synthetic material, for example polyethylene, the intermediate layer 13 consists of a foamed synthetic material, for example polyethylene, to which a foam retarding agent is added, which ensures that the intermediate layer 13 of the wall 10 of the pre = molding 34 will not foam first or not at a measure of importance. The pre = molding 34 is extruded from a predetermined length and at a recognizable length in the open mold 20 and thus between the two mold halves 20a, 20b. With this, the four extension elements 27 of hose-shaped pre-molding extension 27 are closed. As soon as the pre-molding 34 has reached the required final position in the mold 20, this is crushed by the tightening elements 33, as can be seen in Figure 6. With this the extruded length of the pre-molded 34 can no longer be varied. Now the extension elements 27 are retracted again to their starting position of the Figure 3, where in any case they maintain their upper position between the two mold halves 20a, 20b and with this inside the pre-mold 34. In this movement of the extension elements 27 the pre-mold 34 is widened, as it is recognized in Figure 6 With this the clamping elements 33 sink a certain amount until they are in the position shown in Figure 7. The broadening is carried out to such an extent that now the mold core 21 which is located below the premolded 34 is lifted by its and can be introduced into the pre-mold 34. If now the mold core 21 has taken its extreme position according to Figure 7, the extension elements 27 remain again next to the mold core 21 and form together with it the so-called internal mold body. The mold 20a, 20b can now be closed by remaining in the closed position shown in Figure 8. Then the two upper parts 25 and the four side parts 26 are moved equally to their closed position, as can be seen in Figure 9. In this movement the pre-molding 34 is separated from a cape 35. Pre-molding 34 is now exclusively found in a hollow mold space which is internally limited by the mold core 21 with the extension elements 27 and externally by the mold halves. 20a, 20b with the upper parts 25 and the side parts 26. Now the foaming process of the intermediate layer 13 capable of foaming can be carried out. By means of this foaming process, the outer layer 11 and the inner layer 12 are carried, consisting of synthetic material to be supported on the wall of the mold hollow space. The inner layer 12 lies next to the mold core 21 and rests on the extension elements 27, while the outer layer 11 rests on the mold halves 20a, 20b with the upper parts 25 and the lateral parts 26. In such conformation of the installation and with the form of the described procedure is guaranteed, that the wall 10 of the finished device 6 will always have a wall thickness exactly equal to the predetermined one. To facilitate and accelerate the support of the outer layer 11 and the inner layer 12 to the wall of the so-called hollow space of the mold, it is possible to apply a vacuum to the hollow space. To this end, mold openings 21a and mold halves 20a, 20b with the upper parts 25 and the side parts 26 can be used to produce the corresponding vacuum and are generally known. By means of a corresponding shaping of the side parts 26, the recess 14 can be produced simultaneously with the closing of the mold 20. As soon as the device 6 prepared in this way from the premolding 34 is sufficiently cold-in case of need, the core can be mold 21 and the mold halves 20a, 20b cool down with the tops 25 and the side parts 26, the mold 20 can be opened and the finished device removed. Here first the upper parts 25 and the side parts 26 are tilted back to their starting position according to FIGS. 2 and 3. Then the two mold halves 20a, 20b are pushed back to their starting position according to FIG. Figure 2. Now the finished device 6 is still only on the mold core 21 with the extension elements 27. Now the lower edge of the finished device 6 can, for example by means of a surrounding stop strip, be fixed and the The mold core 21 together with the extension elements 27, is returned to its starting position according to Figure 2. Now the device 6 is completely free and can be removed from the installation. To obtain different densities in the foamed intermediate layer 13, it is possible, to build the thicknesses of the individual layers 11, 12, 13 of the wall 10 of the preformed 34 different during the extrusion, in the manner shown in Figures 10b and 10c. Figure 10b shows the wall 10 of a pre-shaped hose 34, in which the intermediate layer 12 as well as the outer layer 11 and the inner layer 12 are extruded by a predetermined path of their length with greater thickness. The wall of the finished device 1 is then formed according to Figure 10Od. Here the intermediate layer 13 presents a contraction, in which zone it is more strongly compressed. Contrary to this, Figure 10c shows the wall of a pre-shaped hose 34, wherein the intermediate layer 13 as well as the outer layer 11 and the inner layer 12 are extruded in their less thick path. This achieves that the intermediate layer 13 in the closed mold 20 with a given thickness of the wall 10 can be foamed more strongly, as can be seen in Figure 10, where the wall 10 of the finished device 1 is shown. it is possible, to the device 6 in the area of its shirt body 8 to provide it with a window or observation strip running vertically 12a, as seen in Figure lb. This can be done in such a way that a narrow longitudinal strip of a transparent synthetic material is extruded during the extrusion of the pre-molding 34 in the extrusion of the pre-molding 34 therein. In case the inner layer consists of a transparent synthetic material, thus not colored, it is possible, that observation strip make it of the material of which the inner layer 12 is made, as indicated in Figure 10Of. An observation strip or window in the sleeve body 8 gives the opportunity to recognize the degree of filling of the container 2. This establishes in all cases, that the container 2 is made of transparent material or also presents an observation strip, which has to be be aligned with the observation strips of the shirt body 8.

It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims (11)

1. Having described the invention as above, the content of the following claims is claimed as property: l.- Device for the protection of a large volume container during the storage and transportation of liquid, viscous powder and granular filling materials, consisting of a carrier body in the form of a pallet supporting the container in its lower part and a body of jacket or cover joined to the carrier body and laterally surrounding the container, characterized in that: the carrier body and the body of the shirt are made in a piece in synthetic material with a wall that is composed of 'three layers, a compact outer layer, a compact inner layer and a foamed intermediate layer.
2. Device according to claim 1, characterized in that the sleeve body is provided with an observation strip or window running vertically.
3. 3. Device according to claim 1 or 2, characterized in that the inner layer is formed of transparent synthetic material and the observation strip is formed of the material of the inner layer.
4. 4. Device according to claim 1-3, characterized in that the outer layer is constructed of a synthetic material of color resistant to UV radiation.
5. 5. Device according to one of claims 1-4, characterized in that the inner layer and the external layer have different wall thicknesses and the intermediate layer has a different density in that field.
6. Method for the manufacture of a device according to at least one of claims 1-5, in which a pre-shaped hose with a three-layer wall is extruded from synthetic material in a predetermined length in a mold The pre-molding and the pre-molding by corresponding movements of the extension elements are broadened to a predetermined extent by introducing from the bottom in the enlarged pre-molding a mold core which, together with the clamped mold, limits a mold space and the mold is closed and the compact inner layer and the compact outer layer of the wall of the pre-molding are brought to rest on the wall of the hollow space of the mold by the foaming of the intermediate layer.
7. 7. Method according to claim 6, characterized in that the extension elements move in the pre-cast extruded from below. 8. - Method according to claim 6 or 7, characterized in that the mold space and / or the mold core is acted upon in the hollow space of the mold with vacuum. 9. - Method according to at least one of claims 6 or 8 characterized in that the mold core and / or the mold are subjected to a cooling medium. 10. - Method according to at least one of claims 6 a, characterized in that the extension elements during the molding process form a part of the core of the mold. 11. - Method according to at least one of claims 6-10, characterized in that the premolded is extruded with a strip or observation window.