JPS5845084Y2 - Foam manufacturing equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to an apparatus for continuously producing a synthetic resin foam that can be cured by reacting resin raw materials such as synthetic resin, especially epoxy resin, phenol resin, and urethane resin at room temperature. .

An endless band of rubber, synthetic resin, cloth, or metal forms a mold member that also serves as a conveyor, and these are arranged vertically facing each other to form a mold that moves in one direction while facing each other in turn. Equipment for making them is known.

When using such equipment to manufacture cold-curing synthetic resin foams produced by condensation reactions using liquid raw materials, especially composite materials that combine foams and coating layers, the prescribed intervals are In this case, it becomes a problem to smoothly feed the raw material being foamed and the coating layer into the mold in which the mold members face each other.

In general, synthetic resin foams that harden at room temperature are produced during the mixing stage of the liquid raw materials, the cream stage when foaming begins in a fine manner, the tuff-free stage when foaming begins and the tackiness decreases, and the foaming stage when full-fledged foaming occurs and reaches its maximum level. It is made through five stages: a rise stage until it expands, and a set stage until the surface hardens and forms the molding stage.The time from the mixing stage to the stage before molding is extremely short, and when heated That time is further reduced.

Furthermore, heat insulating panels for building construction are often manufactured using hard plates made of metal, plaster, synthetic resin, etc. as a coating layer that covers at least one of the upper and lower surfaces.

When such a hard plate is stacked on the lower mold member and a liquid raw material is supplied on top of it and fed into the mold while foaming, the setting period is completed and taken out, the leading edge of the hard plate hits the entrance of the mold. In particular, in the case of a mold in which endless band mold members are arranged on both the left and right sides and the four sides are closed, it is difficult to feed the mold smoothly.

The present invention is intended to solve these problems, and an embodiment thereof will be described below with reference to the drawings. Two mold members 1 and 2, which are vertically opposed to each other and are made of endless steel belts commonly called steel belts, are used to solve these problems. A mold 5 whose four sides are closed is formed by two mold members 3 and 4, which are also made of steel and are made of endless bands, and which are arranged to face each other on the left and right sides.

These four mold members 1, 2, and 3°4 are respectively wound around reversing wheels 6, 7, and 8°9 on the inlet side of the mold 5, and a driving wheel 10 driven by a prime mover (not shown) on the outlet side. 11, 12, and 13, and the part that forms the mold 5 contacts the auxiliary wheels 14, 15, 16, 17, and is sequentially moved facing each other in the same direction at the same speed.

The upper and lower mold members 1 and 2 define the thickness before molding, and the left and right mold members 3 and 4 define the width before molding. It is sandwiched between the left and right end edges of members 1 and 2.

Liquid raw materials for the foam and additives such as flame retardants are supplied from respective feeders 18 and 19 placed in front of the inlet of the mold 5 onto the lower mold member 2 or the coating layer superimposed thereon, and the foaming process is carried out. It is fed into the mold 5 while expanding and sent out as a molded product of predetermined dimensions.Hot air is blown from 20.21 toward the upper and lower mold members 1 and 2, which heats it. The mold members 1 and 2 complete foaming expansion in a short time.

According to the present invention, at least the upper mold member 1 and the left and right mold members 3, 4 are moved from the reversing wheels 6, 8.9, respectively, toward the mold 5 obliquely with respect to the upper surface and the left and right surfaces of the mold 5, whereby the mold 5 In the front part of the entrance of the mold 5, the interval between the upper and lower mold members 1 and 2 and the interval between the left and right mold members 3 and 4 gradually decrease, and the left and right interval reaches the specified interval of the mold 5 in front of the upper and lower intervals. It is supposed to reach.

The embodiment of FIGS. 1 to 5 has four mold members 1° 2.3.
4 is moved obliquely at the front part of the entrance of the mold 5, and the mold members 1° 2.3.
4 is moved diagonally until it reaches the guide wheels 22, 23, 24, 25 at the entrance of the mold 5 and then moved in parallel defining the four sides of the mold 5 until it reaches the exit.

The left and right guide wheels 24.25 are arranged forward of the upper and lower guide wheels 22.23 and rearward of the upper and lower reversible wheels 6, 7.

A long hard metal plate constituting one coating layer 31 is preheated and sent to the mold 5 on a roller conveyor 26, onto which liquid raw material 32 and additives are fed from feeders 18 and 19. Ru.

A soft and flexible covering layer 33.34 made of paper, synthetic resin film, metal foil, or a laminate thereof is supplied to the inner surfaces of the left and right mold members 3.4, and the hard covering layer 31
In front of the entrance of the mold 5, the left and right positions are first regulated by the left and right mold members 3 and 4, and both left and right sides are covered.

A soft and flexible covering layer 35 similar to that described above is provided along the lower surface of the upper mold member 1, and the hard covering layer 31 has its vertical position regulated by the upper and lower mold members 1 and 2, and also covers both upper and lower surfaces. The foam 36 is covered by the covering layers 31, 33, 34, 35, and is fed into the mold 5, which is closed on four sides, and taken out after completing foaming. There is.

The embodiment of FIGS. 6 to 10 has three mold members 1° 3.4
is moved diagonally at the front part of the entrance of the mold 5, and the guide grooves 24 and 25 of the left and right mold members 3 and 4 are moved forward of the guide wheel 22 of the upper mold member 1 and behind the reversal wheel 6. The lower mold member 2 extends in front of the mold 5.

The hard plates constituting the upper and lower coating layers 31 , 35 are conveyed parallel to the mold 5 on the roller conveyor 27 and the lower mold member 2 , from between them onto the lower coating layer 31 in the feeder 18 . A liquid raw material 32 and additives are supplied from 19.

A soft and flexible coating layer 3 is provided on the inner surfaces of the left and right mold members 3 and 4.
3.34 are supplied, and the upper and lower hard coating layers 31.
35 is the artificial front of the mold 5, and first, the left and right positions are regulated by the left and right mold members 3 and 4, and both left and right sides are covered, and then the vertical position is regulated by the upper and lower mold members 1 and 2, and the upper and lower The foam 36 is fed into a mold 5 covered on both sides and closed on four sides, and taken out after completing foaming.
It is covered by 35.

As mentioned above, this design has endless bands arranged on the top and bottom, left and right, and these form a mold with four sides closed.
In front of the entrance of the mold, an endless band is placed diagonally and spread out, and the liquid raw material for the foam is first regulated in its horizontal position and covered on both the left and right sides, and then its vertical position is regulated and covered in both the upper and lower sides. Because it was designed to be fed into the mold with
Even when manufacturing a composite material of a foam and a hard coating layer, the coating layer is caught by the mold member moving diagonally toward the mold, and is smoothly fed into the mold without causing problems such as bumps. It is.

In addition, even if the liquid raw material rapidly expands and expands depending on the ambient temperature and reaches a specified thickness in front of the mold, after covering both the left and right sides, the upper mold member moves diagonally and gradually suppresses it, so that it is not exposed to the outside. It is possible to feed the foam into the mold without overflowing, and therefore it is possible to continuously produce a homogeneous foam with an accurate predetermined shape.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing an embodiment of the present invention, Fig. 2 is a partially cutaway plan view thereof, and Figs. 3, 4, and 5 are Fig. 1 A-A. 6 is a partially cutaway side view showing a different embodiment of the present invention, FIG. 7 is a partially cutaway plan view thereof, and FIG. Figures 8, 9 and 10 are taken from line D-D in figure 6 and line E-E.
FIG. 1.2, 3.4... Mold member, 5... Mold, 6, 7, 8.9... Reversing wheel, 22, 23, 2
4.25...Guide wheel.

Claims (1)

[Scope of utility model registration request] A mold member 1 consisting of endless bands arranged vertically and horizontally,
2, 3.4 form a mold 5 closed on four sides, in which mold parts 1, 2, 3.4 are moved in one direction and a foam is produced therein. In the foam manufacturing apparatus, at least an upper mold member 1 and left and right mold members 3,
4 is spread diagonally in front of the entrance of the mold 50, and the mold 5
A method for producing a foam, in which the left and right mold members 3 and 4 are reduced to a specified interval, and then the upper and lower mold members 1 and 2 are reduced to a specified interval.