DE1005243B - Tamping machine with mobile or self-moving tamper for foundry purposes - Google Patents

Description

The invention relates to a tamping machine for tamping the molding sand in or tightly in molding boxes for foundry purposes. Similar ramming machines with movable or movable ones Stampfwerk belong to the state of the art.

However, these are consistently more or less complex and bulky Acting devices with mobile or movable or standing on the floor of the work place Molding boxes. This is disadvantageous insofar as strong vibrations are expected in the former case must, which do not allow a sufficiently firm crushing, but in the other cases a very uncomfortable one and confusing work by the person operating the machine.

The ramming machines that have also become known with mobile ramming units also have no device for locking the ramming unit in its In use or out of use; but this is for a safe and precise stamping as very essential to look at.

The aim of the invention is to eliminate the deficiencies. It is made by using a pounding machine for Foundry purposes achieved, which consists essentially of a frame with a fixed, rigid stamping table and a stamping mechanism, which can be determined in its working or non-working position and in itself is carried in a known manner by a movable trolley on the frame.

The drawing shows the subject matter of the invention, for example. It shows

Fig. 1 a ramming machine for foundry purposes with partially shown storage rack in the out-of-use position and front view,

Fig. 2 the ramming tools in working position,

Fig. 3 the ramming machine according to Fig. 1 seen in a side view from the right,

Fig. 4 the representation of a single ramming tool, which via a corresponding linkage of an eccentric shaft is controlled, also in side view,

Fig. 5 a top view of a guide housing that is also used for the ramming tools,

Fig. 6 a single ramming tool in conjunction with the guide housing on a larger scale from. seen above,

Fig. 7 shows the ramming tool shown in Fig. 6 in a partial representation seen from the side and

Fig. 8 a front view of a trolley carrying the ramming tools etc.

According to the invention, a ramming machine is now used, which is formed, for example, from several ramming tools a, a trans-ramming machine

with moveable or in itself moveable
Stamping mill for foundry purposes

Applicant:

Edmund Oehrwald,
Vlotho / Weser, Galgenkamp 26

Edmund Oehrwald, Vlotho / Weser,
has been named as the inventor

port car b, a frame c, a shape d and a drive motor e.

The ramming tools are, for example, narrow, elongated plates which are supported in a frame-like manner by strips a ² connected by cross pieces a ¹ . In the middle at the top between the cross pieces, ^{hinged to a pin α 3} , is a rod α ⁴ . This rod and a transmission lever a ^s are connected by an articulated arm a ^e which is pivotably arranged on a bearing b ¹ attached to the transport carriage plate b. A further articulated lever a ⁷ engages at the top of the transmission lever a ^{5 and} is pivotable in a bearing b ^{2 carried by the trolley plate.}

This toggle a ⁷ has a nose-like acting, free ausragendes outlet end which is in engagement with a f on a drive shaft mounted eccentric ^f1.

All ramming tools (there are five, for example, according to the drawing) are arranged side by side so that that the panels located at the lower end of the same work as seamlessly as possible.

Together they overlap a housing g lying in the transverse direction to them , which is provided with corresponding grooves g ¹ in a vertical plane and is used to guide them.

The ramming tools work elastically, for example with the aid of tension springs h, which are each carried in pairs, carried by the cross pieces a ¹ , on the top wall of the guide housing g , so that when the ramming tools are brought into the working position ■ - dem the lowering of the guide housing in the lower position shown in Fig. 2 of the drawing precedes, with the same on the

609 856/191

Base plate b ^{3 of} the trolley is supported - the tension springs are tensioned individually or in pairs or alternately and, with appropriate control by the eccentric disks, suddenly snap downwards. The ramming tools together with the guide housing and all the means used to drive the ramming machine or the drive transmission are carried by the transport carriage b , which essentially consists of a bucket support plate.

After the mold has been filled with sand, the switching lever o ^s is first pivoted by hand into the reverse position indicated by dash-dotted lines in Fig. 3 of the drawing, whereby the eccentric pins I ₁ I ¹ , leaving their clamping position, assume a disengaged position with respect to the rails. The trolley or carriage b

stands on which at the top in bearings b ^l two barrel io is now pulled forward so far that all

wheels b ⁵ and fo ⁶ and a wilt bearing the eccentric disks Z, a drive motor e and bearings & ² for the transmission linkage α ⁵ , α ⁷ are arranged, below which, however, a frame serving to store the ramming tools; located.

The trolley is movably arranged within the storage rack c so that it is hung with the two pairs of running wheels on rails k, k ¹ tamping tools are located exactly above the filled form. The trolley is now locked by pulling the switch lever forward, the eccentric pins in turn assuming their clamping position on the rails and thus pressing the trolley plate against the lower support surface of the running rails k, k ¹ .

In this, ie the working position, by pivoting the hand crank u into the out

the ramming tools in or out of engagement with the form d or the molding box, its. Support frame with the storage frame c is firmly connected to be able to spend.

However, if necessary also the complete one is regarded as lying within the scope of the invention The ramming mechanism cannot be moved into the frame, but the mold or the molding table can be installed in a mobile manner.

To now the mobile trained. Stamping works both in the working position and in the non-working position to be able to determine, the same is equipped with a special safety device.

. This securing means consists in einfachster way of two eccentric I, I ^1, m b in also by the transport carriage plate blocks carried in each case guided pivot pins are mounted η and via a linkage is 0, o ^1, o ^s

and from front to back in the horizontal plane 20 Fig. 2 of the drawing, the position shown by the ramming back or let it move. This is necessary to put tools in their working position, the drive motor put into operation and started tamping, with the juxtaposed Tamping tools continuously first the two outer ones, then the two inner ones and finally that one middle of the same alternately and rhythmically performing the required stomping work. The invention is the first time in a very reliable way a comfortable, very fast and 30 achieved proper work or compaction of the sand in molding boxes for foundry purposes.

In addition, the production costs of ramming machines within the meaning of the invention are lower than those of the previously known type. 35 It is also easily possible to combine molding machines already in use, whose hand rammers, for example, are unusable, with a ramming machine according to the invention. After working using the means of a hand lever o ³ in a clamping position 40 according to the invention, models can no longer warp as shown in Figs. 1 and 3 or in an out-of-clamp position, because the molding sand is always evenly displaced as indicated in Fig. 3 by dash-dotted lines - and is firmly compressed, what can be done with the previous ones, whereby in the former case the eccentric working method was not the case. pin the trolley plate clamping against the
the lower support surface of the rails k, k ¹ so tightly 45
press so that the trolley is unable to move. Bringing the ramming tools into the working or non-working position
happens, as already mentioned, by raising or lowering the guide 50 accordingly
housing g, for example with the aid of a rod p which passes through the housing g, in
In the longitudinal direction of the same passed, with their
protruding sideways at both ends, is mounted in pedestal supports q, q ¹ arranged in the frame j .

In the areas of its end, the rod has eccentric arms r, r ¹ firmly connected to it, which act via articulated levers s, s ¹ on pivot pins t, t ¹ carried by the guide housing g , in such a way that, for example when turning a hand crankHi, the guide housing is turned into a Lowered position (working position) according to Fig. 2 of the drawing, when turning the crank by 180 °, on the other hand, one from Fig. 1

Claims (8)

Patent claims: and 2 emerging superscript (non-working position) is assumed. The plates of the ramming tools should be designed to be exchangeable and also adjustable or longitudinally and transversely displaceable in order to be able to either replace them with new ones, for example, or to be able to adjust them to the molding box. 1. Tamping machine with tamping mechanism, which moves by means of a trolley or carriage or in itself is movable, characterized in that the same consists essentially of a frame (c) with a fixed ramming table and one in its working and non-working position lockable ramming mechanism (α). 2. ramming machine according to claim 1, characterized in that the detection of the ramming mechanism in its in-. and the out-of-work position while securing the trolley (b), which carries the ramming mechanism in a manner known per se and is movable on the frame (c), and with the aid of two eccentric pins (/ and Z ¹ ), each of which is mounted on trestles (m ) guided pivot pin (s) are stored and can be brought into a clamped or non-clamped position via a rod (0, o ¹ and o ² ) which is connected by a common rod (o ⁴ ), with the trolley plate in the clamping position rests immovably on the undersurface of the running rails (k, k ^l ). 55 60 3. ramming machine according to claims 1 and 2, characterized in that the transport carriage (b) carrying the ramming mechanism is suspended from running rails (k, k ¹ ) arranged in the center of the storage frame. 4. ramming machine according to claims 1 to 3, characterized in that the transport carriage (b) down to a frame (; '), in which apart from ramming tools (α) to this to be attacked upward articulated levers (α ⁴ to α ⁷ ) are stored, which form a unified whole and only serve the movement of the tamper in their commonality, whereby the tamping tools in the working position are each controlled individually via the linkage or the articulated lever of a shaft (/), which with one of the number the tamper is equipped with the appropriate number of eccentric disks (Z ^1). 5. ramming machine according to claims 1 to 4, characterized in that of a frame-shaped part (σ ¹ , α ² ) of the tamper (a) a guide housing (g) is received with a cover plate, which can be moved up and down for lifting all ramming tools in an out-of-use position (raised position) or when the guide housing is lowered into the use position. 6. tamping machine according to claims 1 to 5, characterized in that the tamping tools (a) in od a known manner under the action of springs. Like. Are that (α ¹⁾ with their upper ends to the cross pieces, the lower their · The ends, on the other hand, are attached to the top plate of the guide housing (g). 7. ramming machine according to claims 1 to 6, characterized in that the ramming tools (a) , which operate alternately and rhythmically in a known manner, arrive each time they go up under the tensioning action of springs Qi) , when the rammers are reversed they suddenly snap down. 8. ramming machine according to claims 1 to 7, characterized in that the up and down movements of the guide housing (g) with the aid of on a rod (p) mounted eccentric arms (r, r ¹ ) occurs, which via articulated levers (s, s ¹ ) with are connected to a pivot pin (t, t ¹ ) mounted on the guide housing. Considered publications:
German patent documents No. 458 872, 571 777, 827. 1 sheet of drawings © 609 866/191 3.57