JPS647B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for compressing a bone-in meat mass loaded into a cylindrical press chamber between a pressure plunger and an opposing plunger of a press to separate bones and meat. A bone and meat separating device for poultry meat parts such as turkey carcasses,
There is a port in the wall of the press chamber, and the meat that has been turned into a paste state by pressurizing force can pass through the port, but the bones are held back, and both plungers can move in the axial direction of the press chamber, and the opposing plunger is the pressurizing plunger. When the plunger moves in the opposite direction, it opens an outlet for discharging the compressed bones from the press chamber, and the opposing plunger has a sealing part with a larger diameter than the press chamber and a separate port for pasty meat. A filter part of small diameter extends into the press chamber when the counter plunger is in the closed position, the circumferential surface of which is separated from the wall of the press chamber by an annular chamber.

When using a bone and meat separator, the meat part of the pressed material
It often accounts for 60%, and sometimes more. It is therefore naturally desirable to obtain this high meat content as completely as possible, but it has been found that this can only be achieved to an insufficient extent with the known devices. In particular, when pressing poultry meat parts, such as the body (the bird's body from which the wings and legs have been removed), the ring filter that has been commonly used can cause blockages, especially from the skin of the pressed material, resulting in a lower yield. and even functional impairment. Attempts have been made to address this drawback by providing a pointed head on the opposing plunger. This is because it was thought that this configuration would increase the pressure acting on the material to be pressed in the radial direction of the press chamber. However, it was found that the filter was still blocked and the desired yield could not be achieved.

The object of the invention is to eliminate the above-mentioned disadvantages and to improve a device of the type mentioned at the outset, in order to be able to press the pressed material at a low cost and with little functional impairment, resulting in an increased meat yield. It is. To achieve this objective, the present invention forms the wall of the press chamber with a porous filter at least in the area of the opposing plunger, the filter portion is also a porous filter, and the outer diameter of the filter portion is made the same over the entire length of the porous filter of the filter portion. Achieved by For the time being, in the area of opposed plungers, the ring filter commonly used in the known design is replaced by a porous filter. Ring filters have slit-like ports formed around the circumference of the ring between adjacent rings, whereas porous filters have only ports of primarily circular cross-section, especially radial holes. Surprisingly, this port was found to be less prone to becoming obstructed by skin than if a slit was left between adjacent rings.
The same applies to the filter section of the opposing plunger, which also discharges meat inwardly from the press chamber. In this case, the material can reach all ports of the filter part by means of the annular chamber existing between the filter part and the inner wall of the press chamber, so that the filter part works over its entire axial length. This increases yield.

In one preferred embodiment of the invention, the filter section is constructed from a ring having ports on its circumference, the ports communicating with main passages extending tangentially and radially within the ring. The porous filter can also consist of a ring. However, the ports in the ring are formed by holes in the annular jacket rather than by slit-like openings bordered by the interfaces of two adjacent rings as in conventional ring filters. Preferably, according to the invention, each ring with a central opening is retained by a stop plate which is fitted onto a mandrel passing through the ring of the counter-plunger and which is secured to the mandrel and forms the front surface of the counter-plunger.
This facilitates cleaning of the porous filter formed by the ring. According to one development of the invention, all rings have the same outer diameter and preferably the same shape, facilitating correct installation.

The port of the filter part can be connected to a discharge channel provided in the sealing part, through which the pasty meat continuously obtained from the perforated filter of the opposing plunger can be discharged.

Within the scope of the invention, the porous filter, which is preferably arranged at least in the area of the opposing plunger and forms the wall of the press chamber, consists of a thin-walled jacket with circular holes, the axis of which is arranged on a plurality of circles spaced apart in the axial direction of the filter, each of the circles being coaxial with the axis of the porous filter, and an annular reinforcing rib arranged on the outer surface of the jacket between each two said circles; . The reason for this is that the pore diameter of the porous filter is generally very small, mainly about 1.2 to 2.0 mm.
However, holes with such a diameter cannot be reliably or rationally drilled in thick-walled materials. Therefore, it is necessary to use a thin jacket material as the porous filter, but then there is a risk that the thin porous filter material will not be able to withstand the pressure generated. This danger is dealt with by reinforcing ribs. In this case, although it would be possible to construct the porous filter of the opposed plunger from a suitably irregular ring in the manner described above, it is preferable to construct the porous filter in one piece.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to drawings schematically illustrating embodiments of the present invention.

As shown in FIG. 1, the device has a frame 1 in which a press chamber 2 having a horizontal axis is arranged. Bone-in meat to be pressed can be charged into the press chamber through the potper 3. A pressurizing plunger 4 and an opposing plunger 5 are installed in the press chamber 2.
are movable in the axial direction of the press chamber 2, and both plungers 4, 5 seal both front ends of the press chamber 2. When the opposing plunger 5 is in its fully retracted position, it opens the compressed bone outlet 6, and the compressed bone fragments are discharged from the outlet by the pressure plunger 4. Both plungers 4, 5 are preferably actuated hydraulically by hydraulic cylinders 7 or 8 fixed in the frame 1. When the pressurizing plunger 4 is in the completely retracted position, the opening leading from the popper 3 to the press chamber 2 is opened, and the pressed material loaded into the popper 3 can reach the press chamber 2 without any hindrance. Two porous filters 9, 10 are provided one after the other to form the walls of the press chamber 2 and are held between two fixed walls 11, 12 of the frame 1. One side 9 of the porous filter is shown in an enlarged view in FIG. Both porous filters 9 and 10 are surrounded by a meat collecting cylinder 13 brought into a base state by applying pressure, and a connection port 14 for connecting a hose (not shown) is bored in the collecting cylinder. The hose allows the meat to be fed into a container, for example a transport vehicle 15.

The porous filter 9 (FIG. 6) is constructed in one piece and has a relatively thin jacket 16. The jacket forms a mounting flange 17 at one end of the porous filter 9. A number of ports 18 are provided in the jacket 16 through which the pasty meat can pass, but the bones are held back. Each port 18 is formed by drilling holes in the jacket 16. However, the hole diameter of the porous filter 9 closer to the hopper 3 is somewhat larger than the hole diameter of about 1.2 to about 1.5 mm provided in the porous filter 10 farther from the hopper 3, preferably about 1.5 mm to about 2.0 mm. mm. The ports 18 are concentric with the axis of each porous filter 9, 10 and are arranged on a plurality of equally spaced circles.
The ports 18 are evenly distributed along each circle. An annular rib 20 is provided on the outer surface of the jacket 16 between each of the two circles, and the rib strengthens the jacket which receives the pressing force generated in the press chamber 2. In this way, the required strength is imparted to the integrated porous filter 9 or 10.

The counter-plunger 5 (FIGS. 4 and 5) has two parts, a sealing part 21 and a filter part 22, which communicate with each other via a conical surface 23. This conical surface 2
3 has an opposing plunger 5 as a kind of valve cone,
When the right end position in FIG. 2 is reached, the discharge port 6 is sealed. In this position, the filter section 22 is in the press chamber 2.
and extends over substantially the entire axial length of the porous filter 10 surrounding the filter portion 22 on the wall of the press chamber. However, the filter section 22 is separated from the wall of the press chamber by an annular chamber 24 formed by making the outer diameter of the filter section 22 smaller than the diameter 6 of the press chamber 2. This filter section 22 is configured as a porous filter by combining a plurality of rings 25 (FIGS. 4 and 5). Said rings each have an aperture 26 in the center and a mandrel 2 passing through all the rings 25.
It is fitted in 7. The mandrel is screwed into the sealing part 21 of the counter-plunger 5. The circumference of each ring 25 is provided with a number of radial ports 31 for pasted meat, the diameter and configuration of which can be identical to those of the ports 18 of the porous filter 10. The ports 31 communicate with main passages 32 provided within the ring along the circumference of the ring, which main passages are interconnected by a main passage 33 bored axially into the ring wall. Every main passage 33 communicates with a collection chamber 34 between the final ring and the seal 21 , and a discharge passage 35 in the seal 21 connects with said collection chamber 34 . Pipe fitting 3
A hose (not shown) can be connected to the discharge path by 6, and the collected pasty meat can be sent to the transport vehicle 15 via the hose.

In order to prevent the ring 25 from rotating around the axis of the mandrel 27, the mandrel 27 is provided with a wedge-shaped longitudinal projection (not shown), and this projection is engaged with a centering groove formed in the ring accordingly. desirable. The ring can therefore only be fitted onto the mandrel 27 when it is in position. ring 25
It is desirable that they all have the same size and shape so that the order in which they are fitted onto the mandrel 27 does not matter. This prevents assembly errors.

A chute 37 is provided below the discharge port 6, and the compressed bone fragments discharged from the discharge port 6 by the pressurizing plunger 4 are dropped into another transport vehicle 38 through the chute.

The operation of this device is as follows. The pressurizing plunger 4 is completely retracted, the opposing plunger 5 is moved to the position where the discharge port 6 is closed, and the press chamber 2 is filled with the material to be pressed, such as the carcass of a chicken or turkey, from the hopper 3. After that, the pressurizing plunger 4 is moved toward the opposing plunger 5.
As a result, the pressure generated in the press chamber 2 turns the meat attached to the bones into a paste state, and the meat advances from the press chamber 2 through the ports 18 of the porous filters 9 and 10 and the port 31 of the filter section 22 of the opposing plunger 5. do. After the compression is completed, the opposing plunger 6 is moved backward, and the pressurizing plunger 4 is further advanced to discharge the residue from the discharge port 6. After squeezing the first charge, the pressing plunger 4 can be moved back until the next charge can be loaded from the hopper 3 into the press chamber 2 while leaving the opposing plunger 5 in the closed position. This second charge is then pressed together with the residue of the first charge. This process can be repeated several times. The residual cake in front of the opposing plunger 5 becomes larger with each charge. After completion of these steps, the collected residue is discharged in the manner described above.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of the device, Fig. 2 is an enlarged vertical sectional view of the press chamber and both plungers, Fig. 3 is a sectional view taken along the - line in Fig. 2, and Fig. 4 is a cross-sectional view of the opposing plunger. Axial enlarged sectional view showing the configuration, No. 5
The figure is a sectional view taken along the - line in FIG. 4, and FIG. 6 is an axial sectional view of the porous filter. 2... Press chamber, 4... Pressurizing plunger, 5...
...Opposed plunger, 6...Discharge port, 9, 10...
Porous filter, 18... Port, 21... Sealing part, 22... Filter part, 24... Annular chamber, 31
……port.

Claims (1)

[Scope of Claims] 1. A method for separating meat from bones by compressing a bone-in meat mass charged in a cylindrical press chamber between a pressure plunger and an opposing plunger of a press, especially for the carcass of chicken or turkey. This is a bone and meat separating device for poultry meat parts, which has a port in the wall of the press chamber, and the meat that has become pasty due to pressure can pass through the port, but the bones are held back, and both plungers move in the axial direction of the press chamber. When the opposing plunger moves in the opposite direction to the pressurizing plunger, it opens the outlet for discharging the compressed bones from the press chamber, and the opposing plunger opens the outlet for discharging the compressed bones from the press chamber, and the opposing plunger connects the closed part with a larger diameter than the press chamber to the pasty. It has a separate port for the meat and a filter portion having a smaller diameter than the press chamber, and the filter portion reaches into the press chamber when the opposing plunger is in the closed position.
In the case where the peripheral surface is separated from the wall of the press chamber by an annular chamber, the wall of the press chamber 2 is formed of porous filters 9 and 10 at least in the area of the opposing plunger 5, and the filter portion 22 is also a porous filter. A device characterized in that the outer diameter of the portion 22 is the same over the entire length of the porous filter of the filter portion. 2. The filter section 22 is constructed from a ring 25 having a port 31 on its circumferential surface, and main passages 32 and 33 are provided within the ring 25 and extend in the tangential and radial directions.
2. The device of claim 1, wherein the port is in communication with the port. 3. Each ring 25 having a central opening 26 is fitted onto a stem 27 passed through the ring 25 of the opposing plunger 5, and all rings are held by a stop plate 29 that is fixed to the stem 27 and forms the front surface of the opposing plunger 5. A device according to claim 2, characterized in that: 4. The device according to claim 2 or 3, characterized in that all rings 25 have the same shape. 5 At least one of the porous filters 9 and 10 is composed of a thin jacket 16 having a circular hole, and the axis of the circular hole is arranged on a plurality of circles spaced apart in the axial direction of the porous filter, and each of the circles corresponds to the diameter of the porous filter. The jacket 16 is coaxial with the axis 19 of the jacket 16, and an annular reinforcing rib 20 is disposed on the outer surface of the jacket 16 between each of the two circles. The device described. 6. The device according to claim 5, characterized in that the porous filters 9 and 10 are integrally constructed.