DE20218428U1 - Press shield guide for bale press, comprises guide beams guided by rails above press plate - Google Patents

Abstract

Guide beams (12) are mounted on the upper side of the press plate (11) in the press shield (10). The two rear guide beams have their inner sides (13), which face the press chamber door (7), guided by rails (15) above the press plate and the working region (H) of the press shield. The press shield can be moved vertically up and down inside a press chamber, preferably using a hydraulic cylinder which is connected to the press shield in an articulated manner. After the press chamber door has been opened, the bale can be tied with cord and then removed.

Description

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Strautmann Umwelttechnik GmbH u. Co KG

49326 miles

Guide of the press shield on a baler

The invention relates to the guidance of the pressing plate on a baling press for recyclable materials according to the preamble of claim 1.

Balers of this type preferably process voluminous and bulky residual and waste products into space-saving, cuboid-shaped pressed bales that are easy to transport and store.

The pressing chamber is filled with the press shield raised through a lockable opening, such as a flap or door, in the upper part of the pressing chamber. Bulky material introduced is pressed in the usual way in several pressing passes until the desired bale shape is achieved.

The pressed bales are ejected through the door, which is opened at least 90°. In the known baling presses of this type, tensions and tilts arise when the door is opened - the pressing plate must remain in its pressing position until the lacing of the pressed bale is complete in order to maintain the pressed density and shape of the pressed bale. The latter arise because the pressed bale, which is covered on all sides and under tension due to the pressing process, expands towards the now free front when the door is opened. This creates a convex curvature on the open front. The pre-swollen material forming the curvature causes the tension in the material in the front area, below the pressing plate, to drop.

The press plate, which is still under pressure and is hinged to a hydraulic cylinder, adapts to the sloping surface of the bale caused by the drop in pressure. This causes the guide bars to tip forwards so that the upper front ends of the guide bars can tip relatively far out of the press chamber. In addition, lateral pressure is exerted on the hydraulic cylinder, which can lead to damage and leaks.

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The tendency of the press plate to tip is noticeably increased by the fact that the material to be pressed is distributed unevenly, for example, when the rear part of the press chamber is filled with more material than the front. This results in greater compaction in the rear area, which leads to uneven bale density during pressing and to the tendency to tip, which contributes to considerable pressure from the guide rails on the side walls and door and increases wear and deformation of the slideways.

In order to obtain precise guidance and to avoid the press plate tipping over when the door is opened, the invention provides that the guidance of the press plate is improved by additional rails, while at the same time the pressure of the guide rails on the side walls and door is reduced or largely avoided during the pressing process.

The invention is described below by way of example and illustrated in the drawings.

Fig. 1 shows the section through a baler with raised press plate and closed

Fig. 2 shows a cross-section of a baler with the press plate lowered and the door open. Fig. 3 shows a top view of the baler.

The baler essentially consists of a frame 1) which includes the side walls 2) and 3), the rear wall 4) and the door 7) pivoted on hinges 6) at the front and together with these forms a square or rectangular pressing chamber 9). The bottom of the pressing chamber 9) is formed by the floor 5). On the top, between the side walls 2) and 3), a cross member 17) is attached which carries a hydraulic cylinder 14) which is connected via a joint 18) to the pressing plate 10), which essentially consists of the pressing plate 11) and the guide bars 12).

The guide rails 12) carry sliding strips 19) which slide along the sliding tracks of the door 7), the side walls 2) and 3) and the rear wall 4). To prevent the press plate 10) from tipping over and to relieve the sliding tracks, rails 15) fitted with sliding strips 20) are fixed to the cross member 17). To further relieve the sliding tracks of the side walls 2) and 3), holders 22) fitted with sliding strips 21) which are part of the guide rails 12) are attached to the latter.

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The pressing chamber 9) is filled with the pressing plate 10) raised (position A) through the raised flap 8) in the upper area of the door 7). Once the pressing chamber 9) is full, the pressing plate 10) is lowered with the flap 8) closed in order to compact the introduced material. This process is generally repeated several times until a sufficiently solid density and size of the pressed bale to be produced is achieved. The pressing plate 10) performs approximately the stroke H) (see position B).

After opening the door 7), the pressed bale is tied up in the usual way with the press plate 10 lowered. By supporting the guide bars 12) on the rails 15), the press plate 11) cannot tip over. After raising the press plate 10), the pressed bale is removed from the press chamber 9) in the usual way.

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Claims (3)

1. Guide for the press shield on a baler for recyclable materials, in which the press shield is moved vertically in a press chamber, preferably by a hydraulic cylinder which is articulated to the press shield, up and down, and from which, after the door of the press chamber is opened, the pressed bale is first tied up and then discharged, characterized in that guide bars 12 ) are firmly attached to the upper side of the press plate 11 ) of the press shield 10 ), of which at least the two rear ones, on their inner sides 13 ) directed towards the door 7 ), are guided by rails 15 ) which are arranged above the press plate 11 ) and the lifting area H). 2. Guide of the pre-shield on a baler according to claim 1, characterized in that all guide bars (12 ) are guided on their inner sides (13 ) by rails (15 ). 3. Guide for the press shield of a baler according to claims 1 and 2, characterized in that at least two guide bars (12 ) are also guided on the lateral inner sides ( 16 ) of the rails (12 ).