JPS6363172B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an edible tube dryer.

Edible tubes have recently been used for sausage casings, etc., but it is quite difficult to maintain a uniform diameter during manufacturing. In the production of collagen tubes by the wet method, animal fibrous tissue, which is a collagen substance, is used as a raw material for molding, and the raw material is processed by a known method.

A conventional edible tube manufacturing apparatus will be described below with reference to FIG. The film forming stock solution is sent from a tank (not shown) to an annular nozzle 12 via a gear pump 11, and this annular nozzle 12 has an inner cap 12A and an outer cap 12B in order to increase the bursting strength of the tube to be molded. They are rotated in opposite directions to give orientation to the fibers in the stock solution. Inner cap 1
2A is rotated by a pulley 14 connected to an electric motor 13 via a belt 15, and the outer cap 13B is rotated by a gear 16 connected to the electric motor 13.

The coagulating liquid discharged by the pump 18 from the tank 17 storing the coagulating liquid consisting of a concentrated salt aqueous solution is
It rises between the inner periphery of the inner mouthpiece 12A and the outer periphery of the return pipe 19, then rises in contact with the inner periphery of the tube 20 flowing out from the annular nozzle 12, and circulates from the inside of the return pipe 19 to the tank 17. Coagulating liquid in the upper tank 21 (same as the coagulating liquid in tank 17 described above)
is sent from the pump 22 to the liquid tank 23 and comes into contact with the outer periphery of the tube 20, then overflows the liquid tank 23 and circulates from the receiver 24 to the tank 21.
The tube 2 exiting the annular orifice 12 in this way
0 is the inner and outer surfaces of the inner and outer coagulating liquids 25 and 2.
At this time, low pressure air is sent to the upper air chamber 27 above the inner coagulating liquid 25 through a pipe 30 connected from a low pressure air source 28 via a valve 29, and the tube 20
It is designed to keep it in a predetermined shape.

The tube 20 folded above the air chamber 27 is supported and conveyed by a conveyor 31, and enters a tank 33 containing a coagulating liquid 32 equivalent to the above-mentioned inner and outer coagulating liquids 25 and 26, where it is sufficiently heated to be in a stable state. solidified. Next, the tube is washed with water in a desalination washing tank 34, and in order to give flexibility to the tube, a glycerin aqueous solution is sprayed with a sprayer 35, and then the tube is sent to a dryer 3.
It was dried to a specified moisture content in step 6, and then wound up in winder 37.

The diameter D of tubes made with such manufacturing equipment is often about 15 to 30 mm, and the diameter error after drying is required to have an accuracy of ±0.5 mm or more.
However, it has been extremely difficult to maintain such precision continuously over a long period of time with conventional manufacturing equipment. The reason for this is due to the nature of the raw materials and unfavorable conditions peculiar to the molding method. For example, the tube immediately after initial solidification has a moisture content of 90%, that is, most of it is water. Therefore, fluctuations in the discharge amount of the stock solution from the inner and outer mouthpieces 12A and 12B in the circumferential direction and running direction, non-uniformity in the dispersibility and viscosity of the fiber structure in the stock solution, fluctuations in the rotational speed of the inner and outer mouthpieces 12 and 12B, and fluctuations in the flow rate of the stock solution. Flow fluctuations, internal and external coagulation liquids 25 and 26
There are various causes such as fluctuations in the level difference of , fluctuations in the air pressure in the upper air chamber 27, and even if the hardly soluble collagen in the stock solution is swollen with an acid solution and disassembled mechanically, it will not be in a uniform state. , each individually or in conjunction with each other causes the shape asymmetry of the tube. In addition, fluctuations in tube running speed in the secondary coagulation tank 33 and washing tank 34 and uneven concentration of the secondary coagulation liquid are affected by inappropriate conditions in the dryer 36, resulting in tube shape asymmetry. do.

The present invention eliminates such drawbacks, and its purpose is to provide a dryer for edible tube production equipment that can finish tubes with a uniform diameter even if the tubes have uneven diameters during molding. .

The details of the present invention will be explained below with reference to FIGS. 2 to 5 showing one embodiment. In FIG. 2, a heater 103 whose temperature is controlled to be approximately constant by a temperature sensor 102 is provided above the furnace body 101, and the heated air is passed through a duct 106 from a blower 105 driven by an electric motor 104, as shown in FIG. The tube 110 exiting the washing tank 34 and sprayed with the glycerin aqueous solution by the sprayer 35 is heated and dried. This tube 110 is held between a pair of upper and lower cloth belts 60 and 61 which are hung over pulleys 53, 54 and 57, 58. Note that the air humidity inside the furnace body is measured by a temperature sensor 10.
7, and when this exceeds a predetermined value, an exhaust fan 109 driven by an electric motor 108 exhausts the air to the outside.

The details of the fabric belts 60 and 61 described above will be described below. In FIG. 3, the upper two belts 51 and 52 with projections
The lower two belts 55 and 56 with protrusions are placed on pulleys 57 and 58, and the pulleys 54 and 58 are connected to a drive source (not shown). Belts with protrusions 51, 52 and 5
5 and 56 are tubes 5 after adjusting the interval between the belts.
Fabric belts 60 and 61 made of textile or knitted fabric with good air permeability are adhered to each other, the diameter of which is approximately equal to the diameter of tube 59, and the width of which is half the outer circumference of tube 59 after shaping. .

The cloth belts 60 and 61 overlap each other to restrict their position when traveling, so a bracket 62 is provided.
The projections of the projection belts 51, 52, 55, and 56 are inserted into the grooves of guides 64 to 67 fixed to the belts 64 and 63. Here, the tube 110 enters between the two cloth belts 60 and 61 at the pulleys 53 and 57 and exits to the outside at the pulleys 54 and 58. When tube 110 is between fabric belts 60 and 61, it is nipped by two sets of nipper rollers 68 and 69. The lower nip roller is fixed, but the upper nip roller is movable up and down by appropriate means.

When nipping the tube 110, the nip roller 68 is closed, the nip roller 69 is opened, and a hose (not shown) is inserted from the end of the tube 110 to supply air until the internal pressure of the tube 110 reaches a predetermined pressure. At that point, the hose is removed and the nip roller 69 is closed. This injected air is held by nip rollers 68 and 69 for a long time. Further, the tube 110 is inflated into a predetermined shape by the injected air. As shown in FIG. 5, the pulleys 54 and 58 are driven by engaging a grooved pulley 75 fixed to the shaft 74 of the pulley 58 with a belt 76 driven by an electric motor (not shown), and transmitting this rotational force to the gears. It is transmitted to the pulley 54 by 77 and 78.

As described above, in the edible tube dryer of the present invention, a glycerin aqueous solution is sprayed onto the tubes which have been desalted and washed with water, and the tubes are inserted between two cloth belts driven by a pair of pulleys. The position of this cloth-like belt is regulated by a guide while running, and its width is set to 1/2 of the outer circumference of the tube after shaping, and air is fed into the tube from its end and held by a nip roller. It is configured to do so. Therefore, although the tube into which air is blown swells, the fabric belt prevents the tube from swelling beyond a certain value. Therefore, the tube dried under this condition always swells to a constant diameter, so its quality is stable.

FIG. 6 shows another embodiment of the present invention,
In this example, the tube that is inflated and shaped by air between two sets of nip rollers has a means for returning it to a constant pressure when the air pressure decreases during long-term operation, and also has a means for heating it for shaping. This differs from the first example in that preheating is performed before the heating.

The tube 110 sent out from the desalination washing tank 34 of FIG. 1 and sprayed with the glycerin aqueous solution is
It enters the furnace body 81 for preliminary drying, is wound around rolls 82 and 83, and then exits the furnace body 81. Furnace body 81
Relatively low temperature heaters 84 and 85 are installed inside, and the air heated by these heaters 84 and 85 is sent from blowers 86 and 87 to duct 8.
8 and 89 to preheat the tube 110. The tube 110 that has exited the roller 83 is transferred to the roller 9.
After passing through 0, a glycerin aqueous solution is sprayed by a spraying machine 91, and then enters a furnace body 92 for shaping and drying. It includes a belt transport mechanism having two cloth belts 60 and 61. However, since pre-drying has already been carried out in this example, the drying time is short and the only difference from the first embodiment is that the distance traveled by the belt is shorter and that the nip rollers 68 and 69 are not provided. Therefore, detailed explanation of this part will be omitted.

The tube 110, whose outer diameter has been shaped to a constant size by cloth belts 60 and 61 (not shown) inside the furnace body 92, moves in the same direction and at the same speed as the tube 110 when it exits the furnace body 92. It is pressed down by a pair of upper and lower belts 93 and 94. The fixed belt 94 is a fixed pulley 9
5 and 96, and the moving belt 93 is wound around a pulley 98 attached to one side of the swing arm 97.
and 99, and a heavy shaft 100 is provided on the other side of the swing arm 97.
can be fixed at any height. The belts 93 and 94 are driven by pulleys 96 and 99 by an electric motor (not shown). Behind the belts 93 and 94 are a pair of upper and lower nip rollers 121, followed by a take-up roller 122.

To introduce air into the tube 110, press the nip roller 105, and with the nip roller 121 open, insert a hose (not shown) from the end of the tube 110 to inject air. When the air reaches a predetermined pressure, press the nip roller 105. is removed and the nip roller 121 is pressed.

In this state, operate the entire device including Figure 1,
Tube 110 that is nipped after a long period of time
When the air pressure of the tube 110 decreases and becomes lower than a predetermined pressure, the belt 93 is pressed downward via the swing arm 97, and the tube 110 is clamped by the belts 93 and 94. As a result, tube 11
Since the air pressure at 0 rises again, the moving belt 93 is placed at that position and the operation continues. In the above description, the belts 93 and 94 were provided on the outlet side of the furnace body 92, but they may be provided between the nip roller 105 and the sprayer 91.

In this way, in this embodiment, even if the internal pressure of the tube 110 drops, there is no need to insert the platform from the end of the tube 110, so long tubes can be manufactured continuously, and tubes of stable constant quality can be obtained. It also has the advantage of saving time and effort in operation.

[Brief explanation of drawings]

FIG. 1 is a side view of the entire edible tube manufacturing apparatus, FIGS. 2 to 5 show an embodiment of the present invention, FIG. 2 is a side view, FIG. 3 is a perspective view of the main parts, and FIG.
The figures are a cross-sectional view taken along the line -- in FIG. 2, FIG. 5 is a cross-sectional view taken along the line -- in FIG. 2, and FIG. 6 is a side view of another embodiment of the present invention. 60, 61...fabric belt, 64, 65, 6
6, 67...Guide, 68, 69, 105, 12
1... Nippuro roller, 92, 101... Furnace body, 1
03...Heater, 105...Blower, 110...
Tube.

Claims (1)

[Scope of Claims] 1. A furnace body, a heater installed in the furnace body, a blower that sends air heated by the heater, and two tubes that dry the inside of the furnace body in synchronization with the tube. A cloth belt that moves in a shape that wraps around the tube and has a width that is half the outer circumference of the tube after drying, a guide that regulates the running path of the cloth belt, and two pieces of the cloth belt. An edible tube dryer consisting of two sets of Nitsu rollers installed near each end with overlap. 2. A furnace body, a heater placed in the furnace body, a blower that sends air heated by the heater, and two sheets that move in a shape that wraps around the tube in synchronization with the tube being dried inside the furnace body. At the same time, a cloth belt whose width is 1/2 of the outer circumference length of the tube after drying, a guide for regulating the running path of the cloth belt, and a guide for regulating the running path of the tube on the inlet side or the outlet side of the furnace body. a fixed belt installed on one side of the road and driven by a pair of pulleys; a movable belt provided opposite to the fixed belt and moving toward or away from the tube; An edible tube dryer consisting of two sets of rollers installed on the exit side of the belt.