CN212065541U - Cutting device for cutting shrunk artificial casing loop bar - Google Patents

Abstract

The utility model relates to a cutting device for cutting the artificial casing loop bar that the cover contracts, cutting device includes: two blades radial and symmetrical with respect to the longitudinal axis; a drive case of the blade, the drive case having a circular shape and having a central hole for passing the spindle therethrough; wherein the blade has a longitudinal shape and has a first end portion having a semi-circular concave shape portion and a sharp edge, and an opposite second end portion, arranged adjacent to the spindle; and fixing means for fixing the second ends of the blades to the drive box so that both blades have a first rest position in which the first ends are located at a distance from the mandrel and a second cutting position in which the first ends are located on the mandrel and are in contact with the mandrel through the casing nested around the mandrel.

Description

Cutting device for cutting shrunk artificial casing loop bar

Technical Field

The utility model belongs to the technical field of by the tubular casing book production artificial casing loop bar of span several meters length, this artificial casing loop bar is folded and is compressed in high-speed machine, and the utility model particularly relates to be used for the cutting device of loop bar.

Background

Currently, in the production of sausages using collagen casings or cellulose casings, the casings are subjected to preferential preparation to obtain the appearance of the casing, which is dry and rolled up into rolls.

The casing is collected or shrunk in a high speed machine, which shapes a so-called casing bar. The casing stem is formed by a flexible section of flat casing drawn from the roll, which is several metres long and has been folded and compressed in the direction of its axis to form a hard hollow tube of several centimetres long. The walls of the stem are formed by the gathered and compressed folds of casing and thus have rough inner and outer surfaces.

The purpose of forming the loop bars is to provide the sausage maker with a casing that is easy to fill using a machine. It is desirable for sausage makers to have the casing with the greatest rice count on each stem to reduce the number of spare parts and increase the efficiency of the filling process.

The telescoping process forces each sausage casing length unit to produce a number of folds at extremely high speeds. During the collapsing process, the flat casing is first restored to its tubular shape to be longitudinally nested on a straight mandrel. The rollers with serrated contact surfaces press on the outer wall of the casing rotating at high speed in the same direction, while the inner surface of the casing rests on a suitably polished metal mandrel along which the casing slides at high speed under the pulling action of the set of rollers.

A sleeve traveling in the same direction at a smaller controlled speed slows the movement of the casing, creating wrinkles in the wall of the casing on the mandrel.

The rollers are external with respect to the spindle, the rollers being independently operated and constituting groups of three or more rollers arranged radially with respect to the spindle. The arrangement and geometry of the rollers form a drive ring around the casing so that when the rollers rotate, the rollers pull and drag the casing in the direction of rotation and in the direction of the axis of the mandrel.

The simultaneous rotation of the rollers on the outer surface of the casing generates sufficient driving force both for unwinding and dragging the casing to the inlet of said rollers and for folding and compressing the casing simultaneously against the braking means at the outlet of the rollers. Thus, due to the severe compression of the folds between casings, considerable meters of casing can be gathered into the shape of a straight and stiff folded tube measuring several centimeters long. These tubes are called loop bars.

Although the shrink-wrapping operation comprises a perfectly coordinated complex sequence of automated steps, the shrink-wrapping operation is relatively fast, in which the action for each of the steps of the casing must be precise and repeatable to ensure correct execution of each of the steps.

Since the collapsing units or the telescopic rods are independent from each other, one of the steps of the collapsing process comprises separating one collapsing section from the next. The separation takes place by cutting the casing at a distance of a few centimeters from the end of the previous telescoping section. In this way, the stem may have an unsheathed length of casing of between 15cm and 20 cm, which has the function of allowing the casing to be closed by this end by means of sealing, clamping, knotting or the like, which is an essential aspect for future use of the stem in sausage filling machines.

In order to ensure both a proper closure of the loop bars to be output and a proper appearance of the loop bars during the filling process, the cuts to separate the loop bars must be perfect, transverse and performed at high speed.

Examples of prior art include reference US5407382 which defines a cutting system based on a pointed blade, the cutting edge of which is located on the opposite part to the mandrel. The tip pierces the expanded casing and cuts it from the initial cutting position and from the inside to the outside by rotating around the circumference of the casing.

The cutting device is mounted on an annular portion that is rotated about the mandrel and the expanded casing by a drive belt connected to a motor, and has a small piston mechanism that drives the blade up and down. Since the cutting edge is held in a position where it cannot contact the spindle, no damage is caused to either of the cutting edge and the spindle.

This system improves upon similar systems previously found in the soviet patent, in which a recess on the spindle receives the blade in the cutting area. This recess may have the following disadvantages: the recesses provide a friction point or joint with the casing as it passes through it, which may cause possible damage.

However, even if the utility model solves this particular problem, it still presents certain drawbacks, such as the fact that a mechanism for expanding the casing is required to effect the cutting, which complicates the machine and slows down the process. In addition, the blade must rotate a full turn around the casing, and this, together with the possibility that the casing may move because it is swollen and not in contact with any support, leads to inaccurate and irregular cuts, and thus to variable cuts in each case.

These irregularities in the cut cause difficulties in subsequent processing of the loop bars, as well as significant variations in the end result of the cut between loop bars.

In the prior art, there is no system or device that is capable of cutting the ends of the loop bars accurately, quickly, and efficiently, and capable of cutting all the loop bars in a uniform manner.

SUMMERY OF THE UTILITY MODEL

The cutting device for a telescoped artificial casing loop bar proposed herein is provided as a telescoping mechanism for said loop bar and comprises: a straight longitudinal mandrel for casing from a first end of the casing, at least two rollers having serrated surfaces in contact with the casing placed on the mandrel, and a stop sleeve on the first end of the casing.

The device also includes: two blades arranged radially and symmetrically with respect to the longitudinal spindle; a drive housing for the two blades, the drive housing having a circular shape with a central aperture sized to allow a longitudinal spindle to pass therethrough; and a fixing device for fixing the second end of the blade to the driving box.

The blades have a longitudinal shape and have a first end disposed adjacent to the longitudinal spindle, the first end having a semi-circular concave shape and a sharp edge, and a second end opposite the first end.

In another aspect, the fixing means fixing the second ends of the blades to the drive case are such that both blades have a first rest position in which the first ends of the blades are located at a distance from the longitudinal mandrel, and a second cutting position in which said first ends are located on and in contact with the longitudinal mandrel, so that the first ends form a closed circumference through the casing nested around the mandrel.

The cutting device for a telescoped artificial casing sleeve rod presented herein provides a significant improvement over the prior art.

This is achieved by providing an automated cutting device for telescoping casings for separating the loop bars, which achieves better performance by a loop bar processing machine.

In addition, the device significantly improves the cutting of the casing, due to: the increase in speed and precision of the cutting eliminates the risk of defective cutting, which in turn avoids problems in the subsequent processing steps of the loop bar.

The shape and arrangement of the blades is such that even with elements having a plurality of corrugations, a uniform cut along the entire circumference of the cutting portion of the shank is provided.

This is therefore a very efficient device which ensures a clean and fast cut and avoids the above mentioned disadvantages.

Drawings

In order to facilitate a better understanding of the characteristics of the invention according to its preferred embodiments, a set of drawings is provided as an integral part of the description, presenting by way of illustration and not of limitation:

fig. 1 shows a schematic view of a cutting device for a shrunk artificial casing sleeve rod in a preferred embodiment of the invention.

Detailed Description

Based on the provided drawings, it is clear how, in a preferred embodiment of the present invention, the cutting device 1 for a shrink-fitted artificial casing loop bar 2 presented herein is used in a shrink-fitting mechanism of said loop bar, comprising: a straight longitudinal mandrel 3 for casing from a first end 4 of the casing, at least two rollers 5 having a serrated surface in contact with the casing placed on the mandrel 3, and a stop sleeve 6 on the first end 4 of the casing.

As shown in fig. 1, the device 1 comprises two blades 7 arranged radially and symmetrically with respect to the longitudinal spindle 3. These blades 7 have a longitudinal shape and have a first end 7.1 arranged adjacent to the spindle 3 and a second end 7.2 opposite to the first end 7.1, the first end 7.1 having a semicircular concave shape and a sharp edge.

The device 1 further comprises a drive housing 8 for the two blades 7, which drive housing 8 has a circular shape with a central hole of such a size that it allows the longitudinal spindle 3 to pass through it.

The device 1 further comprises fixing means for fixing the second ends 7.2 of the blades 7 to the drive housing 8, so that both blades 7 have a first rest position, in which the first ends 7.1 of the blades 7 are located at a distance from the longitudinal spindle 3, and a second cutting position, in which said first ends 7.1 are located on the longitudinal spindle 3 and in contact with the longitudinal spindle 3, so that the first ends 7.1 form a closed circumference through the casing applied around the spindle 3.

Thus, when the two first ends 7.1 of the blades 7 meet each other, the two first ends 7.1 exert a shearing action on the casing as it traverses it. In the path of the two blades 7 from the first rest position to the second cutting position, the casing is caught between the sharp edge and the concave shape of the first end 7.1 of the two blades 7, so that the casing is cut off with a very clean cut.

Once the cut is completed, both blades 7 return to the first rest position.

In this preferred embodiment of the invention, the fixing means fixing the second end 7.2 of the blades 7 to the drive housing 8 comprise sliding guides guiding each of the blades 7 in both radial directions with respect to the spindle 3.

The above-described embodiments are merely examples of the present invention and therefore, specific details, terms, and phrases used in the specification should not be construed as limiting, but merely as a basis for the claims and as a representative basis for providing an understandable description and sufficient information to enable those skilled in the art to practice the invention.

Claims (2)

1. A cutting device (1) for cutting a jacketed artificial casing bar (2), the cutting device (1) being for a mechanism of the bar, the mechanism comprising: -a straight longitudinal mandrel (3), said longitudinal mandrel (3) being intended to nest said casing from its first end (4); at least two rollers (5), said at least two rollers (5) having a serrated surface in contact with said casing placed on said mandrel (3); and a stop sleeve (6), said stop sleeve (6) being located on said first end (4) of said casing, characterized in that said cutting device (1) comprises:

-two blades (7), said two blades (7) being arranged radially and symmetrically with respect to said longitudinal spindle (3);

-a drive case (8) of the two blades (7), the drive case (8) having a circular shape with a central hole of such dimensions that it allows the passage of the longitudinal spindle (3) through it;

-wherein the blade (7) has a longitudinal shape, the blade (7) having a first end (7.1) arranged adjacent to the longitudinal spindle (3) and a second end (7.2) opposite to the first end (7.1), the first end (7.1) having a semicircular concave shape and a sharp edge; and

-fixing means which fix the second ends (7.2) of the blades (7) to the drive box (8) so that the two blades (7) each have a first rest position in which the first ends (7.1) of the blades (7) are located at a distance from the longitudinal mandrel (3) and a second cutting position in which the first ends (7.1) are located on the longitudinal mandrel (3) and in contact with the longitudinal mandrel (3) so that the first ends (7.1) form a closed circumference through the casing applied around the mandrel (3).

2. The cutting device (1) for cutting a telescoped artificial casing bar (2) according to claim 1, characterized in that the fixing means fixing the second end (7.2) of the blade (7) to the drive box (8) comprise sliding guides guiding each of the blades (7) in both radial directions with respect to the mandrel (3).

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