JPS5850986A - Method and apparatus for heat treatment of cotton - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cotton heat treatment method and apparatus for heat treating mixed cotton used for quilting and quilting at a required temperature so that the cotton does not fall apart.

Heat treatment of cotton here refers to cotton that is a mixture of synthetic fibers with different melting points, or cotton that is a mixture of natural fibers, fibers, and synthetic fibers, and is heated to a required temperature to soften and melt the cotton that has a lower melting point. In addition to partially connecting the cotton to prevent it from coming apart,
This refers to heat-setting cotton into a desired shape or size. Conventionally, the method of heat-treating cotton is to place the cotton on a slat conveyor equipped with a perforated slat plate and heat it from above while passing through a hot air chamber. The cotton is heat-treated by blowing hot air at a temperature that melts cotton, which has a low melting point, and passing the cotton through a porous slat plate, but in the conventional method, the cotton is not pressed down, so the hot air passes through it. (a) The density of the cotton becomes sparse in the upper part and denser in the lower part, producing cotton with uneven density. It shrinks and becomes small, and because the lower part is in close contact with the slat plate, it becomes trapezoidal, which is approximately the same size as before heat treatment, and it has to be cut into rectangles before being shipped as a product, resulting in poor yield.

(c) The bottom surface that is in close contact with the slat plate is smooth, but
The upper surface had some flaws, such as being fluffy because it was not pressed down.

In addition, since the shape of the slab plate of the above-mentioned slide conveyor is the shape shown in Fig. 5, when passing through sprocket 9, the slat plate is in the shape shown in Fig. 6 at the conveyor inlet section A'. The cotton ' bits into the gap 1 between the boards 10 and the groove 2 ,
In this state, when it reaches position B', the gap closes and the cotton is pinched and compressed, and when the conveyor moves further and passes through the hot air chamber D', the cotton is heat treated, and then the conveyor carries out the discharge section C'.
When removing the cotton from the slat plate, the sandwiched cotton is difficult to separate from the slat plate and adheres to the slat plate. This method has disadvantages in that it causes streaks in the horizontal direction, lowering the commercial value, and requires frequent cleaning of the cotton adhering to the slats, which impedes productivity.

The present invention supports a second conveyor that can be raised and lowered and operated at the same speed in parallel above the first conveyor,
By sandwiching the cotton between both conveyors and passing hot air through it, and by improving the shape and mounting of the slat plates on both conveyors, we have created a cotton that eliminates the various drawbacks mentioned above. The object of the present invention is to provide a heat treatment method and an apparatus therefor.

The method and apparatus for heat treatment of cotton according to the present invention include a heat treatment chamber provided to circulate air heated by a heater by converting air heated by a heater into hot air by a blower and sending it to a hot air path, and a heat treatment chamber provided to circulate the hot air; A first conveyor equipped with a perforated slat plate and a second conveyor equipped with a perforated slat plate arranged in parallel above the first conveyor are supported vertically movably by an elevating device. The structure is such that the first conveyor and the second conveyor can be operated at the same speed.

Furthermore, the first and second conveyors are equipped with porous slat plates that allow hot air to pass through, with both ends overlapping and mounted so that they go around the conveyor at equal intervals, thereby controlling the thickness of the cotton to be heat treated. The second conveyor is adjusted according to the degree of shrinkage, untreated cotton is inserted and pressed between the first conveyor and the second conveyor, and hot air is passed through it for heat treatment. be.

Embodiments of the present invention will be described below based on the accompanying drawings.

As shown in Fig. s1 and Fig. 2, the cotton heat treatment equipment E is arranged so that the first conveyor H passes through the hot air path G of the heat treatment chamber F, and its carry-in section A and discharge section C are exposed to the outside. A second conveyor J is installed in parallel above the first conveyor.
are supported on a frame 11 so that they can be moved up and down independently on the inlet and outlet sides of the second conveyor H by a sieving device K, and the first conveyor H and the second conveyor are supported by a speed synchronization device. It is configured to have the same speed as J.

Next, details of each device and chamber will be explained.

As shown in FIG. 2, in the heat treatment chamber F, the air sent by the blower 12 is evenly distributed by the air direction adjusting plate 14, passed through the heater 15, and turned into hot air. The suction section 1 of the blower 12 is disposed on the right side in FIG.
It is structured so that it can be guided and circulated to 7.
The air inlet 19 provided in the upper duct 18 of the blower 12 is provided so that a required amount of dry air can be supplied.

The first conveyor H includes a shaft 22 supported by a bearing 21 on the frame 11, a sprocket 23 fitted and fixed to the shaft, shafts 24 and 25 supported by bearings (not shown), and respective An endless chain 28 that fits into sprockets 26 and 27 that are fitted and fixed to the shaft, and a shaft 22
The sprocket 29 fitted and fixed to the variable speed motor 30
The sprocket 31 and the endless chain 32 that are fitted and fixed to the
The endless chain 28 of the conveyor H is configured to be movable.Furthermore, the endless chain 28 has a long and narrow slab with many ventilation holes (2), whose both ends overlap each other as shown in FIG. They are formed in a five-figure shape and are attached to the endless chain 28 at equal intervals.

The reason why the slat plates N are shaped and combined as described above is that when cotton is placed on the first conveyor H, adjacent slats are placed at the cotton loading section A of the first conveyor H as shown in FIG. Since there is no gap between the plates N, the cotton does not dig in, and furthermore, since there is no cotton biting in at the cotton carry-out section C position of the first conveyor H and at the carry-in section A position, there is little cotton attached to the slat plate N. As shown on the left side of FIG. 4, the slat plate N at the unloading portion C is a good type for the purpose of making it easier to remove the cotton because it flips up the cotton.

In addition, if suction prevention plates 34 shown in FIGS. 1 and 2 are fixed to the back surface of both lengthwise ends of the slat plate N of the first conveyor H, cooling will occur from both sides of the first conveyor H. It can prevent air from being sucked in and allow uniform hot air to penetrate through the cotton.

As shown in FIGS. 1 and 2, the second conveyor J has bearings 41 at both lengthwise ends of a frame 40, shafts 43 and 44 which are also supported by bearings (not shown), and are fitted into the respective shafts. The endless chain 47 is fitted to the sprockets 45 and 46 that are fixed together, and in order to facilitate the loading and unloading of cotton, a shaft 48. which is supported by a bearing (not shown) is installed at a position slightly in front of both ends of the frame 40. 49 and sprockets 50 and 51 that are fitted and fixed to the shaft are engaged with the endless chain 47.

In addition, the endless chain 47 is equipped with a slat plate N' formed in such a shape that both ends thereof overlap each other, almost the same as the slat plate N attached to the first conveyor H.
It is installed so that it goes around at equal intervals along the line 7.

The conveyor lifting device K includes a screw shaft 55 rotatably supported by a bearing on a conveyor support frame 54 mounted on the frame 11 of the first conveyor H (7), and a nut 56 screwed onto the screw shaft. It is fixed to the frame 40 of the second conveyor J and supports the second conveyor J at four locations.

Further, a worm wheel 57 is fitted and fixed to the upper end of the screw shaft 55, and the worm wheel 57 is fitted with a worm 59 rotatably supported on a support plate 58 fixed to the upper part of the conveyor support frame 54. A handle 60 is fixed to the shaft end of the worm, and when the handle is rotated, the worm 59 - the worm wheel 57 - the threaded shaft 5
5 - Nut 56 - Conveyor support frame 54 - This acts to move the second conveyor J up and down. It is necessary to independently adjust the distance between the first conveyor H- and the second conveyor J on the inlet side and the outlet side, and therefore, by properly adjusting it, cotton of uniform thickness and uniform density can be produced. be able to.

The speed tuning device is installed on the right sprocket 2 shown in Figure 1.
A gear 63 is fitted and fixed to one end of the shaft 24 to which the gear 6 is fitted and fixed, and an arm 64 is rotatably fitted and supported on the shaft by a bearing or the like, and the gear 63 is fitted to the tip of the arm. Another gear 65 that engages with the gear 65 is rotatably mounted.

Further, a sprocket and a drawer are fitted and fixed to a shaft 66 fixed to the gear 65 so as to rotate integrally with the gear 65.

A rotatable arm 68 is rotatably fitted and supported on the shaft 66 by a bearing or the like.

The shaft 44 has a sprocket 4 that drives an endless chain 47.
A sprocket 69 is fitted and fixed separately from the sprocket 6, and the sprocket 67 and the sprocket are engaged with each other by an endless chain 70.
By operating the variable speed motor 30, the endless chain 28 of the first conveyor H and the slat plate N attached to the endless chain are moved, and the rotation of the sprocket 26 and shaft 24, which are engaged with the endless chain 28, is controlled by the gears 63 to 30. The sprocket 69 - the shaft 44 - the sprocket 46 is rotated through the gear 65 - the sprocket 67 - the endless chain 70, and the endless chain 47 of the second conveyor J which is engaged with the sprocket 46 and the endless chain 9 are connected. The speed of the second conveyor J can be made the same as that of the first conveyor H by moving the attached slat plate.

Note that the conveyor lifting device K allows the second. When the conveyor (2) is raised or lowered, the arm 64 makes a planetary motion with the gear 65 using the shaft 24 as a fulcrum, and along with the planetary motion, the arm 64
The arm 68 is also moved to allow operation from the first conveyor H to the second conveyor at the same speed (speed synchronization).

The operation will be explained using the above configuration.

As mentioned above, cotton used for quilting, pine tresses, futons, etc. can be a mixture of synthetic fibers or a mixture of natural fibers and synthetic fibers, and it is a mixture of cottons with different melting points. After adjusting the second conveyor J according to the thickness and shrinkability, untreated cotton is placed on the first conveyor H from the loading section A position shown in FIG. Since the cotton is overlapped, the cotton is conveyed without being bitten, and the cotton reaches the entrance position of the vJ2 conveyor J, and the cotton is transferred to the first conveyor.
Slat plates N, N between conveyor H and second conveyor J
', and is carried into the hot air path G of the heat treatment chamber F.

17) At the time of 12 conveyor J slat plate N/, N/
Since the slat plates N and N of the first conveyor H have substantially the same shape and attachment, the cotton will not bite into the slat plates.

Further, since the speeds of the first conveyor H and the second conveyor J are synchronized, there is no misalignment between the upper and lower surfaces of the sandwiched cotton.

In the hot air path G, the temperature of the heater 15 is controlled to blow hot air at a temperature that can melt cotton with a low melting point from the upper surface of the perforated slat plate N' of the second conveyor J, through the chain holes, through the cotton, and onto the first conveyor. Heat treatment is performed while the cotton passes through the hot air path G through the holes in the perforated slat plate N of H and is circulated by the hot air. That is, cotton with a low melting point is melted, the mixed cotton is partially connected to prevent it from sagging, and the cotton is heat-fixed to a uniform thickness between the first conveyor H and the second conveyor J. be done. - This production of cotton is generally carried out continuously for the purpose of improving productivity, and therefore the cotton is continuously heat-treated in the hot air path G.

The cotton that has passed through the hot air path G separates from the second conveyor J, but at the time of separation, the slat plate N is shaped and installed as described above, so the cotton is brushed off and there is no adhesion of cotton.
Subsequently, the $1 conveyor H performs the action of transporting the material from the discharge section C to the next process position without any cotton adhesion.

Here, the results of experiments using the conventional device and the device of the present invention will be compared.

Materials: Cotton mixed with 70% natural fibers (wool) and 30% synthetic fibers (polyester melting point 120°C). Dimensions before heat treatment: Thickness 24 mm, width 240 mm.

Gap between the first conveyor and the second conveyor: 101 on the entrance side
The first exit side is 551 and the second conveyor is inclined. (However, the conventional device does not have a second conveyor.) ゛ Peripheral speed of both conveyors: 1 ml/min 0 Hot air temperature: 150°C.

The results shown in the table above were obtained.

In the case of a mixture of synthetic fibers and synthetic fibers, the shrinkage rate during the treatment is very large, and the difference between the two is significant, so the effects of the apparatus of the present invention can be expected to be great.

In addition, in the embodiments of the present invention, a method and an apparatus for heat treating mixed cotton have been described, but using the apparatus of the present invention, resin can be sprayed onto cotton on the slat plates of the first conveyor and the second conveyor. It is also possible to produce cotton of uniform size by sandwiching and pressing the cotton and passing it through a hot air path at the same speed to weld the resin to the cotton.

With the above-described structure and operation, the cotton heat treatment method and apparatus of the present invention heat-treats cotton by sandwiching the cotton between the first conveyor and the second conveyor set at a required interval and pressing at the same speed. By doing this, it is possible to ensure uniform thickness and width dimensions, as well as smooth surface conditions and uniform cotton density, which improves product yield and provides high-quality cotton. can do.

Furthermore, by configuring and attaching both ends of the adjacent slat plates in the first and second conveyors to overlap, the digging and adhesion of cotton to the slat plates, which conventionally occurred, is eliminated, and cotton streaks are eliminated. This eliminates the need to remove cotton from the slats, increasing product value and increasing productivity.

[Brief explanation of the drawing]

FIG. 1 shows a cross-sectional side view of an apparatus according to an embodiment of the present invention,
FIG. 2 shows a front view of FIG. 1 taken along the line XX. FIG. 3 shows the shape of the slat plate according to the embodiment of the present invention, and the fourth
The figure shows a partially enlarged view of the first conveyor section in FIG. 1. FIG. 5 shows the shape of the slat plate according to the embodiment of the present invention, and FIG. 6 is a side view showing the cotton loading and unloading sections of the conventional two-layer machine. In the figure, F: heat treatment chamber, G: hot air path,
H...First conveyor, J...Second conveyor, K...Elevating device, N, N'・
...Slat plate, 12...Blower,
15... Heater.

Claims (1)

[Scope of Claims] 1. A first conveyor that is provided to allow ventilation and is disposed through the hot air path of the heat treatment chamber, and is supported so as to be movable up and down in parallel at a position above the first conveyor? The distance between the slat plates and the second conveyor, which is provided to allow ventilation, is adjusted to the required dimension, both conveyors are operated at the same speed, and the cotton is sandwiched and pressed between the slat plates of both conveyors to reach the desired temperature. A heat treatment method for cotton, characterized by heat treatment by passing it through a set hot air path. 2. A heat treatment chamber provided so that hot air can be circulated by arranging a blower, a heater, and a hot air path in one circuit, and a first conveyor that is installed to pass through the hot air path of the heat treatment chamber, and a first conveyor that also extends through the hot air path. A second conveyor is passed through the conveyor and is parallel to the conveyor at a position above the first conveyor.
A heat treatment apparatus for cotton, characterized in that a conveyor is supported so as to be movable up and down by an elevating device, and both conveyors are configured to be able to operate at the same speed. 6. The cotton heat treatment apparatus according to claim 2, wherein the first conveyor and the second conveyor are made of porous slat plates with their adjacent ends overlapping each other so as to circulate at equal intervals.