JPH106087A - Flat belt for press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a belt core wire from flying away during using or stripping between belt members and to improve the durability of the belt by providing notches on the upper side faces of a flat belt for pressing in the case of pressing a cake such as a strained draff of beer malt juice and coffee grounds. SOLUTION: This endless flat belt is produced by arranging reinforcing layers 5, 6 on the upper and lower of a core wire layer 4 of burying a core wire 2 with high strength and low extension inside an elastomer 3 and more lapping upper and lower cover rubber layers 7, 8. Notches 9, 10 are provided at least one side of these rubber layers 7, 8, preferably at the both sides on the upper face of the pressing side, even if the upper cover layer 7 is swelled with the liquid of a malt juice, etc., during pressing, the load of applying on the belt 1 from canvas inserting a cake is reduced and its braking is prevented. Further, the notches 9, 10 are shaped at the time of vulcanizing the belt, or these are formed by cutting or grinding after vulcanizing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cake press for removing residue such as squeeze after squeezing out wort and extracting slag after extracting coffee from ground coffee beans when producing beer by a press. More particularly, the present invention relates to a belt having a long life in which peeling and abrasion of the belt are prevented.

[0002]

2. Description of the Related Art In the production of beer, residues such as squeezed residue of beer obtained by squeezing barley and extracted scum after grinding coffee beans and extracting coffee when extracting coffee are further removed. It is used for other purposes such as squeezing liquids such as wort and coffee contained in foods and then feeding them to livestock.

[0003] The residue is squeezed using a squeezing machine, and the residue of the squeezing machine is squeezed by pulling the residue (cake) 21 sandwiched between canvases 20 as shown in FIG.
And a plurality of (20 to 30) flat belts 23 and a process called a cake press.

[0004] As a belt attached to a squeezing machine used for cake pressing the residue, a core layer 14 in which a core wire 12 as shown in FIG.
A flat belt 11 made of an elastomer such as a vulcanized rubber or a resin in which reinforcing layers 15 and 16 such as a woven fabric or a scum are buried above and below, and cover rubber layers 17 and 18 are further laminated. This belt is manufactured by cutting a sleeve of a wide endless flat belt at a predetermined width at the time of manufacture, and has a rectangular cross section.

[0005]

Such a belt is used in a cake press part of a squeezing machine, and the belt is used for cake beer scum and coffee scum during cake pressing. Used when exposed to liquids containing water.

[0006] When rubber or resin is constantly in contact with liquid such as wort, that portion swells, and the cover rubber layer of the belt attached to the squeezing machine also has a long period of time. When exposed to a liquid such as wort, it swells as shown in FIG.

When the cover rubber layer on the belt surface swells, the cover layer adheres to the cover layer and the like in the width direction, so that swelling is suppressed and the rate of change is small, but swelling occurs in the thickness direction. Therefore, the rate of change increases. And
In particular, the swelling in the thickness direction at the side end of the belt increases. On the other hand, the speed of the belt and the speed of the cake are not necessarily the same, and friction occurs between the belt and the canvas, so that the belt is subjected to a shearing force in the longitudinal direction of the belt.

In such a state, if the squeezing machine is continuously used, the pressure applied from the canvas sandwiching the cake to the belt during the cake press is large, especially at the side edge of the swollen belt, and both side edges sandwich the cake. In addition to the problem of rubbing against the canvas and abrasion, the shearing force applied to the belt causes a large shearing force to be applied to the bonding portion between the upper cover rubber layer and the core layer in which the core is buried, so that delamination may occur. Or peeling between the core wire. Also,
When the liquid such as wort soaks into the separated gap, the separation further proceeds. In such a case, there is a problem that the core wire jumps out or the belt is damaged. Therefore, an object of the present invention is to provide a flat belt for a squeezing machine which is less likely to peel between members of the belt even when used in an environment such as a squeezing machine in which rubber easily swells.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is applied to a pressing machine or the like, and covers a core layer extending in the longitudinal direction of a belt spirally embedded in an elastomer. What is claimed is: 1. A flat belt for a pressing machine, comprising: a flat belt for a pressing machine in which a rubber layer is laminated; It is preferable to provide notches at both ends of the upper surface and the lower surface of the belt for reasons to be described later.

[0010]

According to the present invention, since notches are provided at least on both side edges of the upper surface of the belt, even if the cover rubber layer is swollen by a liquid such as wort squeezed by a squeezing machine, the side edges are not covered by canvas. The belt is not subjected to pressure and does not become as large as conventional belts.This prevents wear on the belt side end, peels the cover rubber layer from the core layer in which the core is embedded, and removes rubber and core. Is less likely to occur, and it is possible to prevent the cord from jumping out or being broken, so that the life of the belt can be extended.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional perspective view of a main part of an endless flat belt according to the present invention. In the endless flat belt 1 according to the present invention, a high-strength low-stretch core wire 2 is embedded in an elastomer 3. The reinforcing layers 5 and 6 are arranged above and below the core layer 4 and the upper and lower cover layers 7 and 8 are further laminated.

As the cord 2, a cord obtained by twisting yarns made of polyester fiber, polyamide fiber, glass fiber, aramid fiber, or the like is used. As the elastomer 3 for embedding the core 2 in the core layer 4, natural rubber (N
R), styrene-butadiene rubber (SBR), butyl rubber (IIR), chloroprene rubber (CR), hydrogenated nitrile rubber (H-NBR), and the like.

Examples of the reinforcing layers 5 and 6 include polyester fibers, polyamide fibers, and aramid fibers alone, as well as woven or sewn fabrics formed by blending or twisting. As the upper and lower cover rubber layers 7 and 8, N
Rubber such as R, SBR, IIR, CR, H-NBR is used. In the belt of the present invention, notches 9 and 10 are provided at both ends of at least one of the two cover rubber layers, and when the belt is used in a pressing machine, the upper cover rubber layer 7 is formed by a liquid such as wort. Even when swollen, it can be applied with little or no pressure from the canvas sandwiching the cake. This prevents wear and peeling of the belt side end.

The notches 9 and 10 may be formed by providing predetermined projections on a mold used for vulcanizing the belt, or by shaping, or by cutting or polishing both ends of the cover rubber layer after vulcanization. Obtained by Notches 9, 10
May be a tapered surface as shown in FIG. 1 or may be cutouts 9 and 10 of a round surface as shown in FIG.
Further, as shown in FIGS. 3 and 4, notches may be provided on both side edges not only on the upper surface but also on the lower surface of the belt. By doing so, the pressure received from the pulley is almost nil or can be reduced.
The shearing force applied between the lower cover rubbers 7 and 8 and the core layer 4 in which the core is embedded is also small.

Usually, the flat belt 1 has a width of 50 m.
m, a belt having a thickness of about 8 mm, and the thickness of the cover rubber layers 7 and 8 is 1 to 1.5 mm, so that the height L and the width D of the cutouts 9 and 10 are limited in size. .

The height L of the notches 9, 10 is 0.6 to 1 mm in the thickness direction from the side edge of the upper surface of the belt, and the width D of the notch 9 is the width D from the side edge of the upper surface of the belt. A notch 9 is formed by cutting out a portion of 2 to 8 mm into a tapered shape or a round shape. If the height L of the cutouts 9 and 10 is less than 0.6 mm from the side edge of the belt upper surface in the belt thickness direction, pressure may be applied, and strong contact may be made with the canvas sandwiching the cake. Problems are more likely to occur. On the other hand, if it is larger than 1 mm, the thickness of the cover rubber layer 7 at the side end becomes too thin, which is not preferable.

If the width D of the cutouts 9 and 10 in the belt width direction is less than 2 mm from the side edge of the upper surface of the belt, the effect of preventing peeling is small, and if it exceeds 8 mm, the area of the upper surface of the belt becomes small. It is not preferable because the pressing ability is too low. Next, a comparison was made between the flat belt for a press of the present invention and a flat belt used for a conventional press.

Next, an experiment was conducted to confirm that the belt according to the present invention has a longer life than the conventional belt. The belts used in Examples 1 to 3 used a cord whose core wire was made of polyester, and used a reinforcement made of polyester as a reinforcing layer. Also, chloroprene rubber was used as the elastomer layer for embedding the core wire, and chloroprene rubber was used for the upper and lower cover rubber layers, similarly to the elastomer layer. The belt had a width of 50 mm and a thickness of 8 mm. The notch is provided in both the upper and lower cover rubber layers, and the size thereof is 0.8 mm in the belt thickness direction.
And the width of the notch in the belt width direction is 2 to 6 mm
Has changed between.

The belts used in Comparative Examples 1 and 2 were all the same as the belts used in Examples 1 to 3 except for the size of the notch. As a comparative example 2, the height of the notch was 0.8 mm, which was common to Examples 1 to 3, and the width was 8 mm.

Examples 1 to 3 and Comparative Examples 1 to 2
The belts were operated by pressing them with a squeezing machine, and the time required to reach the end of the life was expressed as an index when Comparative Example 1 which is a conventional belt was set to 100, and compared. Table 1 shows the results. Table 1 also compares the squeezing ability of each belt.

[0021]

[Table 1]

As can be seen from Table 1, Examples 1 to 3, which are examples of the present invention, have a squeezing ability at a practical use level while maintaining the squeezing ability at about 30 to 40% as compared with Comparative Example 1. Has been realized. In addition, the life is shorter than that of Comparative Example 2, but the squeezing ability is at a level that can be used sufficiently.

[0023]

As described above, in the flat belt for a squeezing machine of the present invention, the notches are provided at both ends of the upper cover rubber layer, so that the flat belt is exposed to liquid such as wort or coffee for a long time. Even if the side of the belt swells, the pressure received from the canvas sandwiching the cake is negligible or can be reduced, so that the cover rubber layer can be prevented from abrasion and peeling, and as a result, the core body jumps out Of the belt can be prevented, and the life of the belt can be extended.

[Brief description of the drawings]

FIG. 1 is a sectional perspective view of a main part of a flat belt for a pressing machine.

FIG. 2 is a cross-sectional perspective view of a main part of another embodiment of a flat belt for a pressing machine.

FIG. 3 is a cross-sectional perspective view of a main part of still another embodiment of the flat belt for a pressing machine.

FIG. 4 is a cross-sectional perspective view of a main part of still another embodiment of the flat belt for a pressing machine.

FIG. 5 is a sectional perspective view of a main part of a flat belt used in a conventional pressing machine.

FIG. 6 is a cross-sectional perspective view of a main part showing a state in which the belt of FIG. 3 has swollen.

FIG. 7 is a side view of a main part of a part where the squeezing is performed in the squeezing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flat belt for presses 2 Core wire 3 Elastomer 4 Core wire layer 5 Reinforcement layer 6 Reinforcement layer 7 Cover rubber layer 8 Cover rubber layer 9 Notch 10 Notch 20 Canvas 21 Cake 22 Pulley 23 Flat belt L Height D Width

Claims (2)

[Claims] 1. A flat belt for a pressing machine used for a cake press of a pressing machine in which a cord extending in the longitudinal direction of the belt is spirally buried in an elastomer. A flat belt for a squeezing machine characterized by having a notch. 2. The flat belt for a press according to claim 1, wherein notches are provided at both side ends of the upper and lower surfaces of the belt.