JPH0618605Y2 - Liquid impregnation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a liquid impregnation apparatus for open-cell foams.

(Prior Art) As a liquid impregnation device for impregnating an open-cell foam with a liquid, for example, a device as shown in FIGS. 3 and 4 is used. The liquid impregnation device 15 shown in FIG.
A liquid impregnation tank 7 containing the above, a roll 14 provided on an upper portion of the liquid impregnation tank 7 on the foam loading side, and two sets of impregnating upper rolls 12 for dipping the foam 9 in the liquid. The lower roll 13 for impregnation and the fixed amount squeezing rolls 5 and 5 provided on the upper portion of the liquid impregnation tank 7 on the foam discharge side. The device 15
In, the foam 9 contacts the roll 14 provided on the upper part of the impregnation layer 7, enters the impregnation liquid, and passes between the impregnation upper roll and the impregnation lower roll provided in the impregnation liquid. , Out of the impregnating liquid, and is carried out of the apparatus through the gap between the fixed-quantity squeezing rolls 5 and 5. The foam 9 is impregnated with the liquid while passing through the impregnating liquid 8 and is squeezed between the fixed amount squeezing rolls 5 and 5 to adjust the liquid impregnation amount.

The liquid impregnation device 18 shown in FIG. 4 includes a liquid impregnation tank 7 and a roll 14 provided above the liquid impregnation tank 7 on the foam loading side.
An impregnating roll 16 provided in the impregnating liquid, and a fixed-quantity squeezing roll provided at the upper part of the liquid impregnation tank 7 on the foam discharge side.
5a, 5b ... And rolls 17, 17 provided further on the carry-out direction side than the fixed-amount squeezing rolls 5a, 5b. The fixed-quantity squeezing roll is composed of a large roll 5a provided on the lower side and four small rolls 5b, 5b ... Provided on the upper side. In the apparatus, the foam 9 is impregnated with the liquid while coming into contact with the lower surface of the roll 16 and passing through the impregnating liquid, and after exiting the impregnating liquid, it is squeezed by passing between the quantitative squeezing rolls 5a and 5b. The amount of impregnation is adjusted and then conveyed between the rolls 17 and 17 to the outside of the apparatus.

(Problems to be solved by the invention) However, the commonly used open-cell foams are
Density 0.02g / cm ³ or less, tensile strength 0.5kg / cm ² or less, width 800m
When the foam is transported by being supported only by rolls, as in the case of liquid impregnation with the above-mentioned impregnating device, a strong tensile force acts on the foam to easily break it. Foams, especially in the case of materials such as soft urethane foam, swell and become brittle by an organic solvent,
Since the impregnation with the liquid increases the weight, it becomes more liable to break and continuous processing becomes difficult.

In this way, if the foam breaks in the middle, the operation must be interrupted, and the processing efficiency is greatly reduced. Further, when the human body is impregnated with a harmful liquid, the worker is exposed to the harmful liquid during the repair work, which is a problem in terms of safety. In addition, as described above, in a device that supports and conveys the foam only by the rolls, when the angle of the foam to be conveyed becomes large,
Since the foam slips and spins idle, the conveying angle is small, and it must be preferably 20 degrees or less. For this reason, the apparatus becomes large in size, and there are problems in terms of equipment cost and space saving.

Therefore, conventionally, in an apparatus for treating an open-cell foam by passing it through an impregnating liquid, the foam does not break during liquid impregnation, and the foam does not run idle even if the conveying angle is increased. An impregnation device was desired.

(Means for Solving the Problems) In order to solve the above problems, the liquid impregnation apparatus for an open-cell foam according to the present invention is configured to pass the open-cell foam through the impregnating liquid using a plurality of rolls. In a liquid impregnation device for impregnating an impregnating liquid, a net-shaped belt is hung on a part between the rolls, and the foam is conveyed while being in contact with the surface of the belt.

The roll is preferably an upper roll for impregnation and a lower roll for impregnation for sandwiching and dipping the foam in an impregnating liquid, a fixed squeezing roll for adjusting the liquid impregnation amount of the foam, and optionally another roll. Consists of.

The belt may be hung on a lower roll for impregnation and a roll on the lower side of the quantitative squeezing roll, and one or more belt rolls may be provided in the vicinity of the quantitative squeezing roll,
It may be applied to the belt roll and the impregnating lower roll.

Other desired rolls may be provided at appropriate positions to facilitate the transfer of the foam.

A net-shaped belt is used. This is because the impregnating liquid usually has a high viscosity, and when a plate-shaped belt is used, the impregnating liquid accumulates between the foam and the belt, the foam becomes slippery, and the device spins idle. As a net-shaped belt, for example, based on a net woven of tough fibers such as aramid fiber, glass fiber, polyamide fiber,
It is possible to use those coated with a resin having excellent chemical resistance such as Teflon / polyethylene. Depending on the structure of the roll, a thin net such as stainless steel may be used.

The position of the quantitative squeezing roll, and the position of the roll provided in the vicinity of the quantitative squeezing roll are appropriately determined for the convenience of driving the belt and conveying the foam. The angle of the net belt for transportation up to 6
It is desirable to configure it to be 0 degrees or less.

(Operation) In the liquid impregnation apparatus of the present invention, the foam is conveyed while being in contact with the net-shaped belt hung between the rolls, so that the tensile force applied to the foam is buffered by the belt. Further, in the belt, since the impregnating liquid does not fall from the mesh of the net and is not accumulated between the foam and the belt, the foam does not slip due to the impregnating liquid, and there is no gap between the foam and the belt. It does not spin around because it has an appropriate frictional force.

(Embodiment) FIG. 1 shows an embodiment of the present invention. 1 is a sectional view showing a liquid impregnation apparatus 1 for liquid impregnation of an open cell foam.

The liquid impregnation apparatus 1 includes a liquid impregnation tank 7, an impregnation upper roll 2 and an impregnation lower roll 3 which are provided in the impregnation liquid 8 in the liquid impregnation tank 7 at intervals of about 50 mm, and liquid impregnation. Quantitative squeezing rolls 5, 5 provided on the upper side of the tank 7 on the foam discharge side
And belt rolls 6 and 6 provided in the vicinity of the quantitative squeezing roll 5, an impregnating lower roll 3, and a belt 4 wound around the belt rolls 6 and 6.

The impregnating upper roll 2 has a structure in which it can be pressed by a spring, an air cylinder, or the like, or fixed at a fixed clearance.

The constant-amount squeezing roll and the belt 4 are structured so that they can be simultaneously driven by gears, chains, and the like.

As shown in the enlarged view of the surface of the belt 4 in FIG. 2, the belt 4 has a base net 10 coated with Teflon 11 so that a reaction curable liquid will not cause any problem.

In the liquid impregnation apparatus 1 of this embodiment, the impregnating upper roll 2
And the foam 9 pinched by the impregnating lower roll 3,
The belt 4 is conveyed in contact with the belt 4, and when the belt 4 is driven, the impregnating liquid 8 is automatically impregnated, and is squeezed by the fixed amount squeezing rolls 5 and 5 to a fixed amount of liquid impregnation, and is carried out of the apparatus. It In the device 1, the foam did not break or slip and idle during the treatment.

(Effects of the Invention) In the liquid impregnation device of the present invention, the foam is conveyed while contacting the net-shaped belt hung between the rolls, so that the foam does not break during the processing and the processing efficiency is remarkably high. improves. Further, even when the impregnating liquid is harmful to the human body, the human body is not exposed to the impregnating liquid during the treatment, which is very preferable for safety. Further, even if the conveying angle is increased, the foam does not run idle, so that the apparatus can be downsized, which is also preferable in terms of equipment cost and space saving.

[Brief description of drawings]

FIG. 1 is a sectional view showing a liquid impregnating apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged view showing a surface of a belt portion of the liquid impregnating apparatus shown in FIG. 1, and FIGS. FIG. 3 is a cross-sectional view showing the liquid impregnation device. 1,15,18 …… Liquid impregnation device, 2 …… Impregnation upper roll 3 …… Impregnation lower roll, 4 …… Belt 5 …… Quantitative squeezing roll, 7 …… Liquid impregnation tank 9 …… Open-cell foam

Claims (1)

[Scope of utility model registration request] 1. A liquid impregnation apparatus for impregnating an impregnating liquid by passing the open-cell foam into the impregnating liquid using a plurality of rolls, wherein a net-shaped belt is hung on a part between the rolls to form a foam. A liquid impregnation apparatus for open-cell foams, wherein the liquid is impregnated while being brought into contact with the surface of the belt.