Apparatus for the production of molded concrete parts

Abstract

An apparatus for the production of concrete molded parts in a molding machine includes an upper mold part having a pressure plate arrangement having multiple pressure plates, each facing an opening of a mold insert, wherein each of the pressure plates is screwed onto an intermediate plate, wherein the intermediate plate is connected with a punch plate on the upper mold part on the side facing the upper mold part, by way of at least one pressure punch. The intermediate plate is braced against the punch plate, in that at least one bolt that can be screwed on is passed through an accommodation on the intermediate plate, which bolt releasably engages into the punch plate and has a hollow body that encloses the bolt, between the intermediate plate and the punch plate.

Claims

1. An apparatus for producing concrete molded parts in a molding machine, the apparatus comprising: (a) a mold insert having an opening; (b) an intermediate plate; (c) an upper mold part having at least one pressure punch and a pressure plate arrangement comprising a plurality of pressure plates, each pressure plate facing the opening of the mold insert and screwed onto the intermediate plate, the at least one pressure punch comprising at least one threaded bolt and a hollow body enclosing the at least one threaded bolt; and (d) a punch plate disposed on the upper mold part; wherein the intermediate plate is connected with the punch plate on a side of the intermediate plate facing the upper mold part by way of the at least one pressure punch; wherein the intermediate plate is braced against the punch plate in that the at least one threaded bolt is passed through an accommodation on the intermediate plate; wherein the at least one threaded bolt releasably engages into the punch plate; and wherein the hollow body encloses the at least one threaded bolt between the intermediate plate and the punch plate.

2. The apparatus according to claim 1, wherein the accommodation is formed as a depression having a step-shaped cross-section along a direction perpendicular to a surface of the intermediate plate.

3. The apparatus according to claim 2, wherein the step-shaped cross-section is on a side of the intermediate plate facing the punch plate and has a first inside dimension that corresponds to an outside dimension of the bolt.

4. The apparatus according to claim 3, wherein the step-shaped cross-section has a second inside dimension on a side of the intermediate plate that faces the pressure plate, said second inside dimension being selected to be greater than the first inside dimension.

5. The apparatus according to claim 4, wherein a screw head affixed to the bolt is introducible in a region of the second inside dimension in the intermediate plate, said screw head being disposed on the side that faces the pressure plate, below the surface of the intermediate plate.

6. The apparatus according to claim 4, further comprising a nut that engages into an outside thread of the bolt and introduced in a region of the second inside dimension in the intermediate plate, said nut being disposed on the side that faces the pressure plate, below the surface of the intermediate plate.

7. The apparatus according to claim 1, wherein the hollow body is configured as a hollow cylinder having an upper edge and a lower edge aligned plane-parallel to one another in an axial direction.

8. The apparatus according to claim 1, wherein the at least one threaded bolt is configured with a circular cross-section.

9. The apparatus according to claim 8, wherein the at least one threaded bolt is provided with an outside thread in a region of an end of the at least one threaded bolt that faces the punch plate.

10. The apparatus according to claim 1, further comprising a plurality of intermediate plates and a plurality of bolts and hollow bodies provided for each intermediate plate.

11. The apparatus according to claim 1, wherein the intermediate plate comprises openings for receipt of attachment elements in order to make a screw connection with the pressure plate.

12. The apparatus according to claim 1, wherein the intermediate plate is configured in one piece.

13. The apparatus according to claim 1, wherein the intermediate plate has a plurality of accommodations and openings and an outside circumference forming a closed curve, together with inner surfaces of the accommodations and the openings.

14. The apparatus according to claim 13, wherein the accommodations and the openings in the intermediate plate are offset inwardly from an outer edge of the intermediate plate, wherein the accommodations and the openings have recesses that face toward the outer edge.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Other objects and features of the invention will become apparent from the following detailed description considered in connection with the accompanying drawings. It is to be understood, however, that the drawings are designed as an illustration only and not as a definition of the limits of the invention.

(2) In the drawings,

(3) FIG. 1 is a perspective side view of an apparatus for the production of molded concrete parts according to an embodiment of the invention;

(4) FIG. 2 is a further perspective side view of the apparatus from FIG. 1;

(5) FIG. 3 is a perspective side view of parts of the apparatus from FIG. 1;

(6) FIG. 4 is a further perspective side view of parts of the apparatus from FIG. 1;

(7) FIG. 5 is a further perspective side view of parts of the apparatus from FIG. 1;

(8) FIG. 6 is a further perspective side view of parts of the apparatus from FIG. 1;

(9) FIG. 7 is a perspective side view of a pressure punch for use in an apparatus for the production of molded concrete parts according to the state of the art; and

(10) FIG. 8 is a perspective side view of the pressure punch from FIG. 5 with a pressure plate screwed on.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

(11) In the figures, components that are similar or functionally the same are provided with the same reference symbols.

(12) In FIG. 1, an apparatus VO is shown, which is suitable for the production of molded concrete parts in a molding machine. The apparatus VO has a mold disposed in replaceable manner. The mold is formed by a lower mold part and an upper mold part FB, not shown in FIG. 1. The lower mold part has a mold insert, in a manner usual in technology, which insert has a correspondingly selected number of openings, so that molded concrete parts can be produced in the desired number or size, using the apparatus VO. The upper mold part FB has a plurality of pressure plates DP, wherein each pressure plate DP corresponds with one of the openings. The pressure plates DP are connected with a punch plate ST by way of a plurality of pressure punches DS, in each instance.

(13) Above the punch plate ST, a top-load device AE is provided, which can compress a concrete mixture introduced into the openings of the mold insert as a fill material, by way of the pressure punches DS. An intermediate plate ZW is disposed between the pressure plate DP and the pressure punches DS, on which intermediate plate the pressure plates DP are releasably attached, so that if necessary, the corresponding pressure plate can easily be replaced.

(14) In FIG. 2, the apparatus VO is shown once again in a further perspective side view, from a different viewing angle, wherein now, the apparatus is no longer shown as in FIG. 1, from the underside, with the pressure plates DP disposed there, but rather the view is at a slant from above, onto the intermediate plates ZW. Attachment elements BE are provided for attachment of the pressure plates DP to the intermediate plates ZW. These elements are releasably screwed on, for example by a nut and a threaded rod, which is passed through the intermediate plate ZW and is connected with the pressure plate DP at its other end. As will still be explained below, multiple attachment elements BE can be provided for an individual pressure plate DP in this regard. On its top, the top-load element AE has attachment rails BS, which, together with further elements, which are not, however, an object of the present invention, allow accommodation of the top-load elements in a molding machine.

(15) The pressure punches DS are disposed between the punch plate ST and the intermediate plate ZW; their structure will be explained in greater detail below, making reference to FIG. 3.

(16) In FIG. 3, the attachment of the pressure punches DS on the intermediate plate ZW is shown in a perspective side view. In the exemplary embodiment shown, the intermediate plate ZW is provided with four pressure punches DS. Each pressure punch DS is structured from a bolt BO and a hollow body HO that surrounds the bolt BO. In the example shown, the hollow bodies HO are structured as hollow cylinders, the inside diameter of which is adapted to the circular cross-section of the bolt BO, in such a manner that the hollow bodies HO can be passed over the bolts BO.

(17) In the axial direction, between its upper edge OK and its lower edge UK, the hollow body HO is structured with a length that is selected to be shorter than that of the bolt BO. Accordingly, it is possible that the bolt projects beyond both the upper edge OK and also the lower edge UK, so that an outside thread AG affixed there can be utilized for a screw connection with the punch plate ST or the intermediate plate ZW, respectively.

(18) Accordingly, in the embodiment of FIG. 3 the pressure punches DS are formed by the hollow bodies HO, which, together with the bolts BO, create an attachment both in the direction of the upper mold part FB and downward in the direction of the pressure plates DP.

(19) In order to be able to transfer the pressure forces to the pressure plates DP as uniformly as possible during lowering of the upper mold part FB, it is particularly provided that the side surfaces of the hollow bodies HO are structured to be plane-parallel to one another in the region of the upper edge OK and the lower edge UK, so that a force that acts perpendicularly, introduced from above by way of the top-load unit AE, is transferred to the pressure plates DP without stress.

(20) In FIG. 4, the embodiment shown in FIG. 3 is shown once again, wherein the hollow body HO has been removed for a better explanation. It can be seen that the outside thread AG does not necessarily have to be passed over the entire outside on the bolt BO. Furthermore, it can be seen from FIG. 4 that the intermediate plate ZW has an accommodation AN (see FIG. 6) on the side facing the pressure punches DS, which accommodation is configured with a first inside dimension IA1, which is adapted to the outside dimension of the bolt BO, so that the bolt BO can be introduced into the intermediate plate ZW through the accommodation AN. As will be explained below, support of the bolt BO in the accommodation AN can take place from the side facing the pressure plate DP.

(21) In FIG. 5, the apparatus according to the invention is shown, in which the pressure plate DP is connected with the intermediate plate ZW by way of the attachment element BE. The parts of the outside thread AG of a bolt BO that project in the region of the upper edge OK can engage into corresponding attachments on the punch plate ST, so that bracing of the intermediate plate ZW relative to the punch plate ST can be carried out by way of the bolts BO. The distance between the punch plate ST and the intermediate plate ZW and consequently also relative to the pressure plate DP can be established by way of the hollow bodies HO, so that the apparatus according to the invention can be retrofitted without greater effort both in the event of wear and in the case of retrofitting of a molding machine. Furthermore, it is evident from FIG. 5 that the attachment of the pressure plate DP takes place by way of the attachment element BE, which is formed by a threaded rod GS and a nut MU in the example shown.

(22) In FIG. 6, a view of the intermediate plate ZW is shown from the side facing the pressure plate DP. It can be seen that not only the accommodations AN provided for attachment of the intermediate plate ZW with the bolts BO but also the opening OE, which serves for passing the threaded rod GS through, are provided with recesses AU, in each instance. Accordingly, the intermediate plate ZW is formed with an outside circumference, which, together with the inner surfaces of the accommodations AN and the openings OE, forms a closed curve. Thereby it is possible to produce the intermediate plate ZW shown in FIG. 6 from a planar block, using a single cutting line.

(23) A correspondingly pre-machined metal body, in particular, can be used for this purpose. This body has corresponding plane-parallel main surfaces and is provided with the corresponding accommodations AN or the openings OE in a single work step, using a laser cutting method. In a finishing step, the step-shaped cross-section of the accommodation AN is subsequently formed in the intermediate plate ZW, so that a second inside dimension IA2 occurs on the side of the intermediate plate ZW that faces the pressure plate DP, which dimension is selected to be greater than the first inside dimension IA1. Thereby a screw head or a nut can be introduced in the region of this step-shaped depression, with which the bolt BO is screwed together on its outside thread AG, in order to brace the intermediate plate ZW against the hollow bodies HO.

(24) In comparison with this arrangement, a pressure punch according to the state of the art is shown once again in FIG. 7. Here, the pressure punch DS is usually introduced as a tubular connection between an upper screw-on plate AP1 and a lower screw-on plate AP2, into an opening provided there, and is permanently connected with the screw-on plates AP1 and AP2 by means of a weld seam SW. The upper screw-on plate AP1 in turn has corresponding openings, by way of which the screws SC can engage into the punch plate ST. The screw connection of the pressure plates DP takes place analogous to the manner provided within the scope of the invention, by way of attachment elements BE, as shown in FIG. 8.

(25) As long as the hole pattern of the upper screw-on plate AP1 through which the screw SC is passed agrees with the position of the bolts BO according to the invention, an already existing molding machine can also be retrofitted with the solution according to the invention.

(26) The characteristics that are indicated above and in the claims, as well as that are evident in the figures, can advantageously be implemented both individually and in various combinations. The invention is not restricted to the exemplary embodiments described, but rather can be modified in many different ways, within the scope of the ability of a person skilled in the art.

(27) Thus, although only some exemplary embodiments of the present invention have been shown and described, it is to be understood that many changes and modifications may be made thereunto without departing from the spirit and scope of the invention.