EP1136213A2 - Process and installation for automatic production of hollow bodies out of a mixture - Google Patents

Abstract

The invention relates to a method for the automated production of hollow bodies from mixed material, in particular concrete, in which a mold assembled from a mold core (10) with vibrators (11), a mold jacket (9) and a base sleeve is positioned in a molding station, unconsolidated bulk material, Fresh concrete in particular, is evenly introduced into the mold space between the mold core and the mold jacket, the mix is compacted by shaking, an upper centering is formed by pressing an upper sleeve (7) into the fresh concrete column and then the molded soft body thus formed is removed by pulling it off and into one Drying station is transported. According to the invention, before changing the mold, at least some of the molded parts are automatically assembled in a set-up station and transported to the molding station as a preassembled assembly. Depending on the production process, the molded parts are automatically separated. Before another mold change, they are reassembled into an independent assembly in the molding station for removal. The invention also relates to a plant for the production of hollow bodies from solidifiable mixture, in particular concrete. <IMAGE>

Description

The invention relates to a method for the automated production of hollow bodies from a mix, in particular from concrete, in which unconsolidated Bulk material, especially fresh concrete, in the mold space between a core and a molded jacket is filled in an even distribution, which is in the molding space located mix is compacted by shaking, an upper centering of the forming molded body is formed by pressing in an upper sleeve and the Molded bodies formed by vertical pulling off the molded parts and removed vertically is transported to a drying station. The invention also relates to an installation for carrying out this process.

For the production of concrete pipes for ducts and pipes, shaft linings or other relatively large-volume hollow molded articles made of concrete Molded parts, i.e. the inner mostly hollow cylindrical mandrel, which in the interior of the Formkerns installed jogger, the bottom sleeve and also the outer Shaped jacket, individually transported to the molding station and through in this molding station suitable clamping or connecting means assembled to the overall shape. If after the completion of the manufacture of a first product series, the manufacture of another Product series to be tackled, the previously used must Moldings completely removed and with corresponding moldings for the new product series be replaced. So far, it was necessary to individually remove the molded parts from the To expand and remove the molding station of the system and then the individual molded parts for the new product series also individually in the molding station to bring in, align and fix each other there exactly. In particular With large-volume molded parts, this conversion work required a considerable amount Labor and time expenditure. Because the production naturally occurs during this conversion must be interrupted, there are considerable dead times in the manufacturing process and correspondingly reduced throughput rates.

From WO98 / 57786 it is already known for the simultaneous production of at least two concrete pipes parallel to the outer sheaths of the molds to arrange a supporting frame with the help of detachable coupling devices and together with these support arms vertically or laterally in or out of the forming station to move. Through these measures, the positioning and alignment of two or more form shells opposite the respective fixed form core facilitated. Effects on the conversion when converting the production of one product series to another does not result.

The object of the invention is, in particular when changing from a product series reduce to another required work and time and to simplify the entire conversion.

This object is achieved in that before a change in shape at least some of the molded parts in a set-up station by means of releasable connecting means assembled and transported to the molding station as a pre-assembled assembly whereupon the molded parts in the molding station according to the production needs are automatically separated and for a new change of shape the molded parts are reassembled in the molding station and assembled as an assembly from the Forming station are removed.

Automatically operable as connecting means for the molded parts are expedient Clamping devices used, which are installed directly on the respective molded parts and whose tendons are motorized, e.g. be actuated by pressure medium.

The individual molded parts can expediently also be in one in the set-up station So-called change frame installed and together with this change frame in the Forming station are positioned, in which the clamping device between the individual Molded parts and the change frame according to the production requirements solved and reactivated before removing the module.

The invention also relates to a plant for producing hollow bodies Mixed material, especially concrete, with a supporting structure inside and above a pit, with a vertically movable outer shell, with a hollow Mold core, with at least one vibrating device arranged in the mold core, with a bottom sleeve and an upper sleeve, with a filling device for Introducing the fresh concrete into the mold space, with handling devices for Moving and positioning the molded parts as well as with a control system for the Manufacturing processes, this system being characterized according to the invention in that that at least part of the moldings required for a product type by means of Clamping devices to form an independent assembly outside of the supporting structure is pre-assembled, this assembly in the mold position within the support structure is transportable and the clamping means for separating the molded parts accordingly the respective production requirements can be solved in the molding station, whereby the removal of the molded parts as an assembly after actuation of the clamping device he follows.

A practical embodiment of the system according to the invention is characterized by this from that the molding agent has its own clamping device for direct assembly feature.

Another expedient variant of the system according to the invention has a mobile one Interchangeable frame for the secure reception of the molded parts, which during the Production process in a secured parking position within the supporting structure remains.

The aforementioned system expediently contains motor-operated clamping means Detachable separate connection of the removable frame with the molded jacket, the Mold core, the vibrating device and possibly at least one of the mold sleeves.

One of the essential advantages of the invention in practice is that the for a new product line needed molds while still producing a first one Product series can be assembled into a more or less complete form can. The same applies to the molded parts for the manufacture of first product series used mold, which is also still in the molding station after Completion of the production process assembled into an independent assembly can be, with the help of automated clamping or Lanyards. This reduces the changeover processes when changing products on the expansion of the previous assembly and the insertion of the new assembly into the forming station. The pre-assembly of the new form on a separate Set-up station outside the forming station, in particular by providing the automated one Tensioning and connecting means lead to a considerable simplification and relief assembly work especially for large and heavy molded parts, the production of the first product series being undisturbed during this pre-assembly work can continue to run. The use of automated clamping devices for releasable connection of the molded parts with each other or with the removable frame also a quick and easy assembly of the molded parts for Production of the first product series required mold within the molding station. All in all this saves a considerable amount of time as a complete changeover process in a fraction of the time previously required.

Fig. 1a, 1b

schematisch die wesentlichen Bestandteile einer Anlage zur Herstellung von Betonrohren in Vorder- und in Seitenansicht;

Fig. 2a, 2b

die in ein Wechselgestellt eingebauten Formteile in schematischer Vorder- und Seitenansicht;

Fig. 3a, 3b

die einzelnen Formteile mit einem Wechselgestell in Vorder- und in Seitenansicht; und

Fig. 4a-d

verschiedene Phasen eines Formenwechsels.

Further advantages and special features of the invention result from the following description of a preferred exemplary embodiment with reference to the drawing. Show it.

1a, 1b

schematically the essential components of a plant for the production of concrete pipes in front and in side view;

2a, 2b

the molded parts installed in a removable rack in schematic front and side views;

3a, 3b

the individual molded parts with an interchangeable frame in front and side view; and

4a-d

different phases of a change of form.

The system shown in Fig. 1 has a main frame 1 made of stable vertical beams 2, which extend with their lower part into a pit and through lower and the upper cross struts are connected to a highly rigid supporting structure. On Vertical guides, not shown, within the main frame 1 is a press head 4 movable, which carries a smoothing rod 5 on its underside and connecting means 6 for holding an upper mold sleeve 7. In the shown in Fig. 1 The basic position is located below a side feed and discharge device 8 the actual shape consisting of the outer shell 9, the inner Mold core 10, a vibrating device arranged within the hollow mold core 10 11, which can be connected to the core wall via suitable clamping means, and an interchangeable frame 12 according to the invention, each via locking bolts is separately connectable to the mandrel 10 and the vibrating device 11. How from 1b, there is a core substructure 13 under the mandrel 10, the is supported on the lower cross member 3 anchored in the pit foundation. The Shaped jacket 9 is with its upper end portion on a vertically in the main frame 1 movable mold frame 14 releasably attached.

As can be seen from Fig. 2, the square interchangeable frame consists of four vertical struts 15a-d, which are also at their lower ends by four cross struts 16a, 16b are firmly connected to each other, the vertical struts 15a, 15b at their upper Have ends two cross beams 17a, 17b and through the vertical struts 15c, 15d Cross struts 18 are interconnected.

The mandrel 10 is supported on cross members 20, the locking bolts at both ends 21a, 21b with suitable locking receptacles 22a, 22b in the lower corners of the change frame or frame 12 can be brought into engagement. On the underside of this cross member 20 are vertical locking bolts 23a, 23b mounted (see also Fig. 3).

The vibrating device 11 is designed as a separate structural unit and has on it lower end of a vibratory drive 11a, on the underside of two vertical locking bolts 24a, 24b are mounted.

Locking receptacles are located at the upper ends of the vertical struts 15c, 15d 25a, 25b are provided, in which inclined support brackets 26a, 26b via locking bolts can engage that attached to the upper mold frame 14 for the mold jacket 9 are. The mode of operation, in particular of the locking members or locking bolts of the individual molded parts with the receiving parts of the interchangeable frame can be seen from Fig. 3a, 3b.

4 shows four phases of a removal process of a complete form jacket, Mold core and vibrating device as well as the change frame according to the invention Shown form. Since every single molded part, i.e. the formant, the Mold core and also the vibrating device, each via separate locking elements is detachable with the removable frame, there is the possibility, only in each case to couple and fit or remove individual molded parts with the interchangeable frame. This choice, depending on the operational circumstances, increases the flexibility of the entire manufacturing and changeover process.

In state 4a, the press head 4 is in relation to the basic position according to FIG. 1 in a lowered operating position and the shape inside the pit below ground level. In this position, the mold frame and the change frame 12 coupled and the conventional clamps of the mold shell, the mold core and the vibrator is released. Furthermore, the locking bolts of the mandrel inserted and locked in the corresponding receptacles of the interchangeable frame. In a corresponding manner, the vibrating device is locked with the mold core. After loosening the smoothing bar clamp, a vertical upward movement takes place of the plunger in the position shown in Fig. 4b, in which the now locked with the change frame to an assembly parts in one Position immediately above the discharge device 8. In this raised Position becomes a support member 28 of the discharge device 8 in the main frame 1 retracted laterally, on the in the position of FIG. 4c, the change frame 12 with the mold jacket 9, the mold core 10, the vibrating device 11 and the Smoothing rod 5 is deposited. Through a lateral movement or shifting movement is the assembly of the mold jacket 9, mold core 10, smoothing rod 5 and vibrating device 11 moved out of the main frame 1 onto the platform of the discharge station 8.

The invention is not restricted to the exemplary embodiment shown. So can may also be dispensed with the removable frame 12 shown. In this case Locking and clamping devices are to be arranged on the individual molded parts mutual intervention can be brought and thus the assembly of the enable individual molded parts to form an independently transportable assembly.

Claims (8)

Process for the automatic production of hollow bodies from mixed material, in particular from concrete, in which unconsolidated bulk material, in particular fresh concrete, is poured into the mold space between a mold core and a mold jacket in a uniform distribution, the mix is compacted in the molding room by shaking, an upper centering is formed by pressing an upper sleeve into the fresh concrete column, and the formed body is demolded by vertical pulling and is transported upright to a drying station, characterized in that Before changing the mold, at least some of the molded parts are assembled in a set-up station using releasable connecting means and transported to the molding station as a pre-assembled assembly, the molded parts are automatically separated according to the production requirements in the molding station and For a new mold change, the molded parts are reassembled in the molding station and removed as an assembly from the molding station. A method according to claim 1, characterized in that automatically operable clamping means are used for the assembly of the molded parts, which are installed directly on the respective molded parts and the tendons of which are actuated by a pressure medium. Method according to claim 2, characterized in that the individual molded parts are installed in a change frame in the set-up station and are positioned together with this change frame in the mold station, in which the clamping means between the individual molded parts and the change frame are automatically released as required in accordance with the production requirements and before the removal of the module can be reactivated. Plant for the production of hollow bodies from mixed material, in particular from concrete, with a supporting structure (1) inside and above a pit, a vertically movable outer mold jacket (9), a hollow mandrel (10), at least one vibrating device (11) arranged in the mandrel, a bottom sleeve and an upper shaped sleeve, a filling device for introducing the fresh concrete into the molding space, Handling devices for moving and positioning the molded parts as well a control system for the manufacturing processes, characterized in that at least some of the molded parts (9, 10, 11) required for a product type can be preassembled into an independent assembly outside of the supporting structure (1) by means of clamping means (21, 22, 25, 26), that this assembly can be transported into the mold position within the supporting structure (1), that the clamping means (21 to 26) for separating the molded parts can be released in accordance with the production processes in the molding station, the molded parts being removed again as an assembly after actuation of the clamping means. System according to claim 4, characterized in that the molded parts (9, 10, 11) have clamping means arranged thereon for direct assembly. System according to claim 4 or 5, characterized by a mobile interchangeable frame (12) in which the respective molded parts can be mounted by means of separate clamping means and which remains in a secured storage position within the supporting structure (1) during the production process. System according to claim 6, characterized in that separate motorized or mechanically actuated clamping means (21a - 26b) for the detachable connection of the interchangeable frame (12) to the molded casing (9), the molded core (10), the vibrating device (11) and possibly at least one of the molded sleeves are provided. System according to one of claims 4, 6 or 7, characterized in that the clamping means contain locking bolts which automatically snap into corresponding locking receptacles due to vertical movements of the individual molded parts.

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