JPS6010928B2 - How to pack mineral fiber matte - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for packing mineral fiber mats such as glass fiber mats so as to prevent them from collapsing.

Glass fiber mats, an example of mineral fiber mats, are made by depositing glass fibers on a belt and spraying a binder on it.
It is compressed to a predetermined high density, hardened, and continuously produced as a wide strip, and then cut to a predetermined size to absorb sound.
Widely used as insulation material.

Since glass fiber mats have a low bulk density, they become bulky when packaged and transported, requiring a large amount of space and cost. ) will be awarded. However, since mats are soft and easily deformed, compressed packages are prone to buckling during handling and transportation, and this tendency is particularly noticeable when the mats are cut into smaller sizes. For example, if a glass fiber mat is cut into about 280 pieces per desk, then compressed, and then packed in a roll, the center part will protrude and form a tree, which may cause complications. The reason for this is not clear, but it seems that when the mats are cut to a small size, they tend to slip along the contact surfaces of the rolled up mats, causing the load to collapse. This causes the mat to buckle easily, and therefore, the mat is compressed and packed in a large size that prevents slipping between the contact surfaces, and after unpacking, the mat must be cut into smaller pieces on site. In order to solve these difficulties, the present inventor has devised the following method. Namely, the mineral fiber mat is raised and lowered from the nozzle to the lowest pressure necessary to completely cut the mineral fiber mat. The fibers are ejected along the cutting line of the mat, cutting most of the fibers of the mat, compressing the mat with a few scattered uncut fibers that are still in a loose state with a roll, and then rolling it into a roll. It has been found that the following favorable results can be obtained if the material is rolled up and then packaged.

In other words, most of the fibers that make up the mat have been cut along the entire length of the cutting line, and although the mat appears to have been completely cut, there are some scattered uncut fibers that remain. The mats on both sides along the cut line are weakly bonded due to the fibers that are attached to them.

This bond is extremely weak and can be easily separated by hand during use, and since most of the fibers have already been cut at the cutting line after separation, a sharp cut without fluff can be made. If a small-sized mat bonded with such cut fibers is compressed and packed without being separated along the cut line, the small-sized mat will be bonded with extremely weak force. Similar to when compressing and packing small-sized mats that are not cut, the load does not collapse.
It has been found that the presence of the above-mentioned scattered uncut fibers is extremely effective in preventing load shifting. The method of the present invention is useful as a method for cutting sound-absorbing and heat-insulating mats made of mineral woven material. As mineral fibers, not only glass fibers but also rock wool, birch cotton, silica fibers, kaolin fibers, alumina fibers, etc. can be used, and the method of the present invention can also be carried out on mats using the above-mentioned various mineral fibers. Note that similar effects to the method of the present invention can be obtained by compressing and packing a mat that has been cut discontinuously (incompletely cut) such that parts cut with a cutter alternate with parts that are not cut. If the uncut part of the mat after the check rail is separated by hand, this part tends to become fluffy, which is a problem. . Furthermore, the method using a cutter has the following drawbacks.

In other words, mats are often backed by asphalt waterproof paper, etc., adhered to the bottom surface of the mat with asphalt, but in order to completely prevent the compressed mat from shifting, the mat is lined after unpacking. Incomplete cutting that allows paper to be easily separated even with a smooth cut surface requires delicate technical control, and asphalt adheres to the cutter blade and contaminates the cut surface, which often results in It is necessary to stop work and clean the blade. The method of the present invention does not have the above-mentioned difficulties, and it is possible to cut most of the backing paper, and the mats that are incompletely cut and compressed and packaged by the method of the present invention do not cause any sagging. Moreover, the mat after being unpacked can be easily separated by hand along the cutting line without any fuzz or the like and with a beautiful and smooth cut surface. The packing method for mineral fiber mats according to the present invention involves raising and lowering the pressure of the liquid vertically around the minimum pressure necessary to completely cut the mineral fiber mat, while passing the cutting line of the mineral fiber mat from a nozzle to the cutting line of the mineral fiber mat. squirt along the
This is a method in which most of the fibers of the mat are cut, and the mat, which is still in a different state with a few scattered uncut fibers, is compressed with a roll, and then this is wound into a roll and then packed.

Although the effect of the present invention is not fully clear, the uncut fibers are not concentrated in one place as in the case of mechanical incomplete cutting using a cutter, but a small number of cut fibers are scattered over a wide area. It is thought that this part acts effectively to prevent the load from collapsing. Even after cutting, most of the liquid has a large amount of energy and flows downward through the mat, and a small portion remains within the mat, but this amount is small and does not pose a problem to the work. Next, to explain the present invention more specifically, by jetting high-pressure liquid of about 1000 to several thousand k9 / yen from a nozzle and directing it perpendicularly to the mineral fiber mat, and moving the mat along the cutting line. Most of the fibers constituting the mat are cut along the entire length of the cutting line, a few cut fibers are scattered, and the mats on both sides along the cutting line are compressed and packed while being weakly bonded by the uncut fibers. Do the following.

The liquid pressure in the nozzle required to completely cut such mats depends on the working conditions (for glass fiber mats the main variables are thickness, density, line speed, etc.), the material of the mat, The minimum value determined by the fiber structure (
If the mat is cut only with the liquid pressure below this minimum value, a cut line will be formed with a large number of fibers remaining uncut along the entire length of the cut line, and therefore,
The compressed and packed mat cannot be easily separated by hand along this cutting line after unpacking. Therefore, it is not possible to form a beautiful and smooth cut surface. However, when cutting the mat by ejecting the liquid from the nozzle while raising and lowering the pressure of the liquid around this minimum cutting pressure, most of the fibers that make up the mat are cut along the entire length of the cutting line, as described above. After being cut, a few fibers remain scattered in an uncut state, and the mats on both sides along the cutting line are weakly bonded by the cut fibers, making compression packaging extremely suitable for preventing cargo from collapsing. be able to.

The amount of pressure fluctuation is determined by the working conditions, but it is appropriate that the pressure be fluctuated within a range of 2 to 20%, preferably 4 to 10%, of the minimum cutting pressure.

Note that conditions such as the minimum cutting pressure and pressure fluctuation vary depending on the material and fiber structure of the mat to be cut, and are determined experimentally.

The method of the present invention has the above-mentioned effects, so that the mats compressed and packed by the method of the present invention have a small amount of uncut fibers scattered between the mats on both sides of the cutting line, which is effective in preventing the load from collapsing. There is no risk of the load collapsing in the same way as when compressing and packing large mats that are not cut.Moreover, even if the mats after the cross section are lined with asphalt waterproof paper, the outer appearance is completely cut. It looks like this, is easy to separate by hand, and has the advantage of being able to obtain a beautiful and smooth cut surface.

Next, an example of implementation of the present invention will be shown.

Example: Glass fiber mat manufactured using a centrifugal glass fiber manufacturing device [fiber thickness 6 mm, flat cut thickness 80 mm/skin, medium 1 total 0 skins/machine (6 x 280 kites/machine)] A heat-insulating sound-absorbing board with a protective layer made of paper glued to it with asphalt is heated to 280 m
The kite was cut into pieces of about 16 m/m, which were then compressed to a thickness of about 16 m/kite and wound into a roll.

If the liquid pressure is 2100k9/kg, the mat will be completely cut, streaks will appear when the mat is rolled up and packed while being compressed, and the mat will often become loose during transportation.

Claims (1)

[Claims] 1. While raising and lowering the pressure of the liquid up and down around the minimum pressure necessary to completely cut the mineral fiber pine, the liquid is ejected from the nozzle along the cutting line of the mineral fiber pine, and most of the pine is cut. A mineral fiber mat characterized by cutting the fibers, compressing the mat which is still connected with a few scattered uncut fibers with a roll, and further winding it into a roll and packing it. Packing method.