JPS61245362A - Apparatus for applying foam composition to fiber knitted cloth - 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 [Industrial Field of Application] The present invention relates to a rotary screen type foaming device having a novel squeezing structure.

This skeg is closed on all four sides, and a part of it is opened and connected to a slit section, and the foam material is passed through the slit section through the screen mesh, and the foam composition is applied to the fiber woven or knitted fabric. The structure is such that it can be coated with

[Conventional technology]

Rotary screen foam applicators consisting of a squaging device and a screen are known and are also commonly referred to as slit doctors or box doctors. Further, a coating device in which a coating mechanism is provided in a closed container is also known.

Furthermore, it is also known to supply dyes and chemicals in the form of foam, and various methods have been proposed as shown below.

(Apparatus for applying fiber woven or knitted fabric by directly contacting the foam-like substance ejected from 11 slots (Japanese Patent Laid-Open No. 53-143797)
).

(2) A device that coats foamy substances with a doctor knife.

(3) A method in which foam is applied to a certain thickness on an endless belt, then a fiber woven or knitted fabric is bonded to the endless belt, wound around a drum, and the pressure is reduced from inside to absorb the foam (Japanese Patent Laid-Open No. 56-58057 ).

(4) A method of applying foam onto a rubber roll using a doctor knife and wrapping the object to be treated over the foam to absorb the foam (Japanese Patent Laid-Open No. 56-37361).

(5) A method in which foam is placed on a horizontal padder and the object to be treated is passed through it.

Among the above methods, in methods (1) and (2), since the foam and the object to be treated come into direct contact, the applicability depends on the water absorption of the object, and it is impossible to freely adjust the amount of application. It is. On the other hand, with methods (3) and (4), it is difficult to uniformly coat the belt or roll. This means that the bubbles are at least 10
This is because it has a diameter of 0μ or more, making it difficult to apply a thin layer, resulting in uneven coating due to repellency, and decomposition in a short period of time. Furthermore, the method (4) is not a versatile method because it causes problems with loose bubbles and is limited to thick objects.

Furthermore, in method (5), if the foam is not quite stable,
Cannot be applied uniformly. Furthermore, it is influenced by the liquid absorption capacity of the treated fiber material. Furthermore, in the coating method, it is difficult to uniformly apply the foam due to its behavior as a plastic fluid.

In contrast, a rotary screen method has been proposed in which the bubbles are forcibly applied under pressure through a screen (Japanese Patent Laid-Open No. 110359/1983). This method is ideal considering the behavior of bubbles as a plastic fluid.

The injection of bubbles allows for good liquid penetration, and the screen mesh can be expected to make the application more uniform. Furthermore, the foam from the foaming machine is consumed immediately without stagnation.
Unless the feeding control method of the foaming machine, the structure of the skeg, etc. are devised, it is difficult to uniformly coat the fiber material to be treated in the width direction, length direction, and even thickness direction. In addition, the frictional force of the skeg against the screen is large, and it vibrates during operation, resulting in disadvantages such as the inability to apply the skeg regularly. Further, if there is a dead space inside the cage, there is a problem that the amount of applied foam is increased due to drainage of bubbles.

[Problem that the invention seeks to solve]

The present invention aims to solve the problems of the above-mentioned rotary screen type foam application apparatus, and therefore provides a foam application apparatus including a scouring device having a novel structure.

[Means for solving problems]

Specifically, the present invention provides a rotary screen type foaming device for applying a foam composition to a textile fabric, which comprises a squaging device and a screen. a slit that communicates with the foam container and is configured such that the opening is in sliding contact with the screen; The present invention is characterized by comprising a foam supply device disposed so as to penetrate the container in the width direction thereof.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view schematically showing one embodiment of the foaming device according to the present invention. The foam supplied from the foaming machine (not shown) passes through the supply pipe (5), The foam container (3) is filled with approximately equal amounts in the direction, and the screen (2
) is press-fitted into the fiber woven or knitted fabric. During this time, the bubble pressure is not released and the process is carried out in a closed system. Second
As shown in the figure, the foam supply device (5) has a tubular structure and is made of metal such as stainless steel or plastic material such as polyvinyl chloride. Its structural feature is that it has a large number of holes (6) with a diameter of 11 or less, and its distribution changes continuously from coarse to dense from the foam supply side to the exit side. The maximum distance between them is 100 cranes or less, and the minimum distance is 1n or more. Note that the arrow in FIG. 2 indicates the direction of travel of the bubbles.

A specific method for adjusting this supply device is as follows. 520 holes of 0.6n are drilled at 2.5fi intervals over a length of 130cm in a polyvinyl chloride pipe with an outer diameter of 21mm. To adjust the amount of foam discharged in the width direction,
Fill half of the holes while measuring the foam discharge amount for 1 minute at 10aa intervals, and the error in the discharge amount in the width direction is ±lθ%.
Make sure that it is within the range.

FIG. 3 is a graph showing the measurement results of the discharge amount when the liquid supply amount was 750 m1/min and the foam was expanded 10 times.

FIG. 4 is an enlarged sectional view showing the features of the slit portion of the device shown in FIG. The slit portion (4) is composed of two elastic members (7) and (8), and has an opening with a width of 3 to 15 squares relative to the inner circumference of the screen.

As the material of these elastic members, for example, a stainless steel plate having a thickness of 0.25 mm is used. 7 is a portion that performs a bubble sealing action, and 8 is a portion that performs a scaping action. This scaping member (8) is supported by a fixing mechanism (9) that uses air pressure, and the scaping member is supported from its back by a reinforcing member Ql, the length of which occupies more than half of the scaping member. There is. The reinforcing member is made of epoxy resin, urethane resin, metal, etc., and is selected from a material that is thicker and more elastic than the scaping member.

When the foam application device is operated without using a reinforcing member, the skeg tends to cause knocking due to the frictional force with the screen, and the foam is not uniformly applied, resulting in a step-like defect. By using the reinforcing member, the scaping pressure can be increased and the recovery ability of the scaping material from deformation can be increased, thereby eliminating the above-mentioned drawbacks. Another advantage is that the penetration of the bubbles into the thickness of the treated fiber material is improved.

A feature of the skeg according to the present invention is that there is no foam dead space. As shown in Figure 5, the foam container (3) in the cage is separated at both ends of the working width of the slit.
The arm part for mechanically supporting the skeg is removably screwed, and there is no foam in this part, and the foam supplied from the foam supply device (5) is passed through the hole (6).
The foam is guided into the foam container (3) and extruded through the slit (4). The foam container (3) is divided by the width of the slit as a limit, and is detachably supported by an arm portion that mechanically supports the skeg and a screw fastening mechanism Ql). That is, in this method, the time from foam generation to consumption is short, and it is possible to prevent the formation of spots due to foam drainage.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view schematically showing one embodiment of a foam supply device according to the present invention, FIG. 2 is a schematic diagram showing an example of a foam supply device, and FIG. 3 is a measurement of the amount of foam discharged from the foam supply device. A graph showing the results, FIG. 4 is an enlarged sectional view schematically showing the staking part of the device shown in FIG. 1, and FIG. 5 is a schematic diagram for further explaining the configuration of the staking device of the device shown in FIG. be. 1...Scage device, 2...Screen, 3...
... Foam container, 4... Slit, 5... Foam supply device, 6... Hole, 7.8-... Elastic member,
9...Scage fixture, 10...Reinforcement member.

Claims (1)

[Scope of Claims] 1. A rotary screen type foam applying device for applying a foam composition to a fiber knitted fabric, which is composed of a scage device and a screen, wherein the scage device is configured to apply a foam whose surroundings are sealed. a slit communicating with the foam container, opening only in the direction of the screen, and configured such that the opening is in sliding contact with the screen, and a slit inside the foam container extending in the width direction of the foam container. A device comprising: a foam supply device disposed so as to penetrate through the device. 2. The foam supply device consists of a tubular body with an inner diameter of 10 mm or more, and the hole diameter is 1 mm in a range longer than the working width of the slit.
The following large number of pores are formed, and these pores are distributed in such a way that they change continuously from coarse on the foam supply side to dense on the opposite side, and the maximum distance between adjacent pores is is 1
00 mm or less, and the minimum distance is 1 mm or more. 3. When the foam composition is supplied from the foam supply side of the foam supply device, the fluctuation in the amount of foam discharged per minute measured every 10 cm in the length direction of the foam supply device is within ±10%. 2. A device according to claim 1, wherein the device is located in: