FR2695061A1 - Dosing device for a formwork machine for concrete slabs. - Google Patents

Abstract

The metering device for filling facing concrete mixtures of molding forms open upwards for plate formwork machines intended for the manufacture of concrete slabs, comprises a tank comprising a flat bottom plate provided with several openings bottom and a drawer plate arranged on the underside of the bottom plate and which has metering chambers corresponding in number and arrangement to the bottom openings. The sliding movement of the drawer plate 4 is linear and the number and arrangement of the discharge openings 10 over the entire bottom surface of the molding formwork form a network of regularly distributed points. Application to the rapid filling of mechanical formwork for concrete slabs.

Description

ASSAY DEVICE FOR A PLATE FORMWORK MACHINE

OF CONCRETE

  The present invention relates to a metering device for filling, with the aid of facing concrete mixtures, upward-opening pressing forms in plate presses for the production of coating plates.

concrete or the like.

  Such metering devices for feeding a layer of facing concrete into the various pressing forms for the manufacture of plates of all types and intended for all uses, are in practice known by the term "concrete batchers". These devices comprise a tank intended to receive concrete mix facing, and whose flat bottom has, depending on the size of the molding forms to be filled, from one to four (and for very large molds also up to six ) openings

background.

  Bottom openings are opened or closed by means of a rotary slide For this purpose, a slide plate is rotated about a vertical axis of rotation, whereby dosing chambers are provided in the plate. in number and arrangement corresponding to those of the bottom openings of the tank, are brought in correspondence with the openings of the bottom (that is to say that the bottom openings are open), or the closed separation surfaces of the drawer rotary shut off the bottom openings (ie

  that the bottom openings are closed).

  The dosing chambers integrated in the drawer

  have a structure in which their underside

  is attached to a rigidly fastened closure plate, which has correspondingly to the number and arrangement of dosing chambers or bottom openings

  of the tank, discharge openings which are

  of the entire surface of the tank bottom openings so that the dosing chambers are open upwards or

  down by the rotational movement of the rotary slide.

  The dosing principle previously described using a dosing chamber, guarantees the quantity supply in volume

  exactly measured in facing material in each cof-

  In mold formwork, the facing material must be evenly distributed before the so-called back or inner concrete layer is introduced into the molding formwork and the facing concrete layer with the inner concrete layer

  or back is molded into the formwork.

  The regular distribution of the facing material

  produced in the molding form in the form of individual heaps is made by vibrating the molding formwork This ensures, depending on the consistency of the facing material, times of distribution or implementation

  more or less long vibrations which delay the subsequent

  the inner or rear concrete layer.

  modern and more powerful installations for the molding of concrete slabs, such as for example very short rotary table formwork machines

  cycle time, is thus hindered.

  The object of the invention is therefore to provide a metering device for the filling of concrete forms for facing the formwork molds of plate forming machines, which leads to substantially shorter distribution times, while ensuring the division

  of the facing material introduced into the cof-

moldings.

  The object of the invention is embodied in a device

  of the type previously described, in which the displacement

  slide sliding plate is linear and the number and arrangement of the discharge openings over the entire bottom surface of the casting form

  is planned to form a network of regularly

  with more than six discharge openings, preferably thirteen discharge openings, for

normal format.

  It has been common practice to use rotary dosing chambers with dosing chambers, which are rotated in the form of sectors and in sequence around a

  Vertical axis of rotation Inside a circular sector

  The possibility of arrangement for bottom openings, metering chambers and discharge openings is limited. It is probably for this reason that the development of the dosing members is limited, depending on the size of the one-piece molding casing. number between one and four for bottom openings, dosing chambers

and the discharge openings.

  According to the teachings of the invention which exceed the existing state of development, provision is made for the first time a linear displacement drawer with chambers of

  integrated assays, which cover substantially better

  are the common rectangular formats of the concrete slabs to be manufactured or the molding forms used for this purpose Thus the achievement of the other characteristics of

  the invention makes it possible to provide a regular network of points

  distributed or distributed for the arrangement of a plurality

  discharge openings of the dosing member.

  According to the state of the art,

  tooth, for example the arrangement of at most four casing discharge openings for a concrete plate size 50 x 50 cm, according to the teaching of the invention, there are now thirteen discharge openings that are provided for the same format and that ensure immediately

  after the discharge of the necessary facing material,

  that is to say, immediately after the fall of the facing material on the bottom of the molding form, a layer of concrete facing relatively good and regularly distributed, without it being necessary to provide for it long periods of vibration for the distribution of the material of

siding in the molding mold.

  According to the tests, the cycle times of the molding plants which operate with a dosing member according to

  the invention can be substantially reduced.

  Other goals, features and benefits will appear

  when reading the description of an embodiment

  of the invention, made in a non-limiting manner and with reference to the accompanying drawing: FIG. 1 represents the network of points for the number and the arrangement of the discharge openings of the new metering member; Figures 2 and 3 each show a sectional view of the

  new concrete dosing device for

  in two typical positions of the drawer for the linear drawer according to the invention. FIGS. 2 and 3 show the basic structure of a siding concrete dosing unit. This metering member consists of a tank 1, which comprises a flat bottom plate 2, provided with a plurality of Background openings 3 The bottom openings are each formed in the form of bushing sleeves, in which an agitator (not shown) disposed inside the tank

  matching facing material.

  Below the bottom plate 2 provided with the bottom openings 3 is the linear spool 4, which is arranged on the fixed closure plate 5 and which can be moved linearly on this sheet with the aid of FIG. 'a cylinder

hydraulic 6.

  The closing plate 5 is retained in the frame 7, which is capable of being positioned in height with the aid of at least two vertical displacement pins 8, so that the force of application between the closure plate 5, the linear spool 4 and the bottom plate 2, is adjustable. The linear spool 4 comprises metering chambers 9 open upwards and downwards and which, in the sliding position of the linear spool shown in FIG. 2, are brought into correspondence with the bottom openings 3 of the reservoir, such that way they can be fulfilled

  For this purpose, the openings

  the dosing chambers are closed by

bottom closure 5.

  FIG. 3 shows the sliding position of the linear spool, in which the metering chambers 9 are slidably displaced above the discharge openings, which are provided in correspondence with the number and the arrangement of the metering chambers and the bottom openings. 3 of the reservoir in the closing plate, but are however shifted over their entire surface relative to the bottom openings, so that by the sliding movement of the linear slide 4, the metering chambers 9 are open upwards (FIG. 2) or downwards (FIG. 3) The entire dosing member with its components mentioned above is pivotally suspended on a tubular bracket 11, so that this member can pivot above the molding forms in an installation of molding and be brought exactly above the formwork of

corresponding molding.

  FIG. 1 is a fragmentary representation in plan view of the turntable 12 of a turntable formwork machine provided with mold frames 13 which surround two molding forms 14. The tip network can be recognized for the arrangement and the regular distribution of all of the thirteen discharge openings 10 above each of the two square molding forms shown, of normal size and whose edge lengths are for example

50 cm.

  Of course, the present invention is not limited to the embodiments described and shown, but it may have many variants accessible to humans.

  art, as long as one does not deviate from the spirit of the invention.

Claims (1)

  1. Dosing device for filling concrete mixes with facing molding forms   open to the top of plate formwork machines des-   for use in the manufacture of concrete slabs or the like, comprising a tank having a flat bottom sheet having a plurality of bottom openings, a drawer sheet disposed on the underside of the bottom sheet and having a plurality of metering chambers and in an arrangement corresponding to the bottom openings, these chambers being closed upwards by the bottom plate and being open in correspondence with the bottom openings, and a closure plate fixedly mounted on the underside of the metering chamber and has discharge openings in number and in arrangement corresponding to that of the dosing chambers, these openings being arranged offset over their entire surface with respect to the bottom openings of the sheet metal;   in such a way that, as a result of the displacement of   slidably, the metering chambers are open either upwards or downwards, characterized in that the slide displacement of the slide plate (4) is linear and in that the number and the arrangement of the discharge openings (10) over the entire bottom surface of the   molding form, form a regular network of   distributed and having more than six discharge openings, preferably thirteen discharge openings, for plates of normal size.