KR20230056970A - Apparatus for polyurethane forming - Google Patents

Abstract

Polyol and ISO are respectively supplied to a mixer through an auxiliary tank, such that a sufficient amount of polyol and ISO can be stored in advance in the auxiliary tank, thereby expanding the size of polyurethane foam which can be foamed and molded at once. In particular, the polyol and ISO are supplied to the mixer which moves up and down within a mold through a supply means installed to move around the mold, such that a sufficient amount of polyol and ISO are supplied at once according to the size of the polyurethane foam to the auxiliary tank of the supply means, thereby enabling mixing and foaming In addition, the supply means is configured to receive the polyol and ISO using a pump by mounting the auxiliary tank on a stand with an adjustable height on a base, such that the supply amount of polyol and ISO can be easily supplied to the mixer while having a simple structure.

Description

Polyurethane foam molding device {APPARATUS FOR POLYURETHANE FORMING }

The present invention relates to a polyurethane foam molding apparatus, and more particularly, to a polyol and diisocyanate (hereinafter referred to as 'ISO'), which are mixed when molding polyurethane foam, are stored in separate auxiliary tanks, respectively, and polyol and By configuring the pump to supply more polyol and ISO than when directly supplying polyol and ISO within the cream time when ISO reacts by foam molding, it is possible to increase the amount of mixture input, thereby increasing the size of polyurethane foam, improving productivity and yield that made it possible to improve

Polyurethane foam is a sponge-like porous material made of polyol and diisocyanate, and is widely used as a cushion and insulation material because of its high insulation properties and excellent electrical insulation efficiency. Such polyurethane foam can obtain various performances depending on the mixing ratio of polyol and diisocyanate, and is manufactured in various ways, as shown in (Patent Document 1) to (Patent Document 3) below.

(Patent Document 1) Korea Patent Registration No. 10-2205059

A polyol component containing a polyisocyanate component containing bis(isocyanatomethyl)cyclohexane, a low molecular weight polyol having a number average molecular weight of 400 or less, and a high molecular weight polyol having a number average molecular weight of 2,500 or more and 4,000 or less, In a method for producing a polyurethane resin by reacting in the presence of a bismuth catalyst to obtain a primary product (reaction step) and then heat-treating the primary product to obtain a polyurethane resin (heat treatment step), the polyurethane resin The bismuth catalyst content is 0.1 ppm or more and 1,000 ppm or less, and the heat treatment conditions in the heat treatment step are 50 ° C. or more and 100 ° C. or less, and 3 days or more and 10 days or less.

(Patent Document 2) Korean Patent Publication No. 10-2020-0103055

(i) applying one or more layers of reinforcing fibers onto the core layer and applying a moisture-curable polyurethane adhesive to the layers of reinforcing fibers, (ii) placing the part from (i) into a mold and pressing in the mold and curing the moisture-curable polyurethane adhesive; and (iii) removing the molding from (ii) from the mold and optionally subjecting it to further operation, wherein: The curable polyurethane adhesive is applied before or after application of the layer of reinforcing fibers onto the one or more core layers and for curing the moisture curable polyurethane adhesive is contacted with water or a solution containing water. The invention also relates to a polyurethane sandwich molding obtainable by this method and to the use of the polyurethane sandwich molding in a vehicle.

(Patent Document 3) Korean Patent Publication No. 10-2021-0085732

It relates to a hybrid polyurethane foam capable of shielding electromagnetic waves using a mold carrier and a method for manufacturing the same, using a mold carrier capable of shielding electromagnetic waves, which is light in weight, excellent in insulation and heat dissipation, as hard and soft components are arranged in a sandwich manner It relates to a hybrid polyurethane foam capable of shielding electromagnetic waves and a method for manufacturing the same.

As such, the method of mixing polyol and diisocyanate is, as shown in [Fig. 1] and [Fig. 2], using the mixer 20 in the mold 10 manufactured in the shape of the polyurethane foam to be molded, and diisocyanate are mixed, and the mixed solution mixed in the mixer 20 is put into the mold 10 to form a polyurethane foam in the shape of the mold 10. To explain this in more detail, as shown in [Fig. 3], ISO is dropped into the mixer 20 and polyol is dropped and mixed. At this time, before mixing the polyol and ISO, depending on the performance of the polyurethane foam, functional materials, For example, a mixture of ISO and polyol is made by adding and mixing graphite to give functionality to polyurethane foam, and then mixing polyol therein. The mixture obtained in this way is poured into the mold 10 within a cream time in which a chemical reaction occurs in the mixture, and a polyurethane foam is formed in the shape of the mold 10.

Korean Patent Registration No. 10-2205059 (registration date: 2021.01.14) Korean Patent Publication No. 10-2020-0103055 (published date: 2020.09.01) Korean Patent Publication No. 10-2021-0085732 (published date: 2021.07.08)

However, the foam molding apparatus for molding polyurethane foam by injecting a mixture obtained by mixing polyol and diisocyanate (hereinafter referred to as 'ISO') in a mixer into a mold has the following problems.

(1) The addition of polyol should be completed during the cream time, which is the time for mixing polyol and ISO. This is a limited time cream time, usually about 15 seconds when mixing 35 to 40 kg of stock solution (mixture of polyol and ISO) with a mixing ratio of polyol and ISO of 1:1.43, within this time the polyol and ISO Mixing should be finished.

(2) However, in mixing polyol and ISO in the conventional method, there is a limit to the stock solution that can be supplied in a limited creaming time as the stock solution is supplied using a pump.

(3) The limit of such a stock solution also causes a limit to the capacity of the mixture for mixing polyol and ISO. Accordingly, the size at which the polyurethane foam can be molded at one time is also limited according to the capacity of the mixture.

(4) In other words, as polyol and ISO are supplied using a pump with a limited capacity as in the past, there is a limit to the amount of polyol and ISO that can be supplied for a given creaming time, so there is a limit to manufacturing a large polyurethane foam. there is.

The present invention takes this point into consideration, and is configured to supply polyol and ISO through an auxiliary tank to a mixer that supplies a polyol and ISO mixture to a mold to form polyurethane foam, so that a sufficient amount of polyol and ISO can be supplied to the auxiliary tank in advance. An object of the present invention is to provide a polyurethane foam molding device capable of storing polyol and ISO and thus forming a large size of polyurethane foam that can be expanded and molded at one time.

In particular, the present invention is configured to supply polyol and ISO to a mixer that moves up and down in the mold through a supply means movably installed around the mold, so that sufficient amount according to the size of the polyurethane foam is provided through a supply means equipped with an auxiliary tank. Another object is to provide a polyurethane foam molding apparatus capable of mixing and foaming by supplying an amount of polyol and ISO at once.

In addition, the present invention is configured so that the supply means can receive polyol and ISO with a pump by mounting an auxiliary tank on a stand whose height is adjusted on a base moving by casters, so that the structure is simple and the supply amount of polyol and ISO is easily mixed. Another object is to provide a polyurethane foam molding device that can be supplied to.

Polyurethane foam molding apparatus according to the present invention for achieving this object includes several molds 100 configured according to the size of a polyurethane foam block; A mixer 200 for receiving and mixing polyol and diisocyanate (hereinafter referred to as 'ISO') at a predetermined ratio; Supply means 300 is configured to supply the polyol and ISO to the mixer 200, respectively. The supply means 300 includes a base 310 having casters 311; a stand 320 installed on the base 310 and capable of height adjustment in the longitudinal direction; an auxiliary tank 330 installed on an arm 331 extending from the stand 320 and positioned above the mixer 200; and a pump 340 supplying a certain amount of polyol and ISO using a pump.

In particular, the mixer 200 is arranged to drop a mixture of polyol and ISO supplied through the supply means 300 onto the mold 100 while moving up and down in the middle of the mold 100. to be characterized

The polyurethane foam molding apparatus according to the present invention has the following effects.

(1) It is possible to supply a large amount of polyol and ISO to the auxiliary tank in advance by supplying them through the auxiliary tank instead of directly supplying polyol and ISO to the mixer using a pump.

(2) This makes it possible to manufacture a larger polyurethane foam because a larger amount of polyol and ISO can be supplied to the mixer during the time when the polyurethane reaction occurs while the polyol and ISO undergo a chemical reaction.

(3) Accordingly, polyurethane foams having various sizes may be foam-molded by selecting a mold having an appropriate size according to the amount of polyol and ISO supplied to the auxiliary tank.

(4) Therefore, polyurethane foams of different sizes can be molded through a simple process of exchanging molds of different sizes and shapes, and a sufficient amount of polyol and ISO can be supplied for a limited time, thereby producing polyurethane foam. can increase

(5) On the other hand, the auxiliary tank can store polyol and ISO by a predetermined capacity through a pump and drop the amount required for polyurethane foam molding at once according to the mold size, and after dropping, the pump again as needed. Since it is supplemented, polyurethane foam of a desired size can be easily and conveniently foamed and molded.

[Figure 1] is a perspective view showing the configuration of a polyurethane foam molding machine composed of a conventional mold and a mixer.
[Figure 2] is a schematic diagram showing the configuration of a polyurethane foam molding machine consisting of a conventional mold and a mixer.
[Figure 3] is a block diagram showing a process of foam molding a polyurethane foam with a polyurethane foam molding machine consisting of a conventional mold and a mixer.
[Figure 4] is a side view showing the configuration of a polyurethane foam molding apparatus according to the present invention.
5 and 6 are operational state diagrams showing examples of supplying polyol to the polyurethane foam molding apparatus according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Prior to this, the terms or words used in this specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventors should properly define the concept of terms in order to best explain their invention. According to the principle that it can be interpreted as meaning and concept consistent with the technical spirit of the present invention.

Therefore, since the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention, various equivalents that can replace them at the time of this application It should be understood that there may be variations.

[Configuration of polyurethane foam molding equipment]

The polyurethane foam molding apparatus according to the present invention includes a mold 100, a mixer 200, and a supply means 300, as shown in [Figs. 4] to [6].

In particular, the supply means 300 is for supplying polyol and ISO to the mixer 200, respectively, and by having an auxiliary tank 330, by adjusting the polyol and ISO stored in the auxiliary tank 330, the mold 100 Depending on the size, it is configured to drop an appropriate amount of polyurethane foam at once for foam molding, so that a sufficient amount of polyol and ISO are mixed during the cream time in which the polyurethane reaction occurs. It is possible to increase productivity by supplying polyurethane foam with a larger size.

At this time, the supply means 300 enables the auxiliary tank 330 to be adjusted through the height-adjustable stand 320 on the rollable base 310, and to supply polyol and ISO through the pump 340. By configuring, while the structure is simple, it is possible to easily and conveniently foam and mold polyurethane foam of various sizes according to the capacity of the auxiliary tank 330.

Hereinafter, this configuration will be described in more detail with reference to the accompanying drawings.

go. Mold

As shown in [Figs. 4] to [Fig. 6], the mold 100 maintains a constant shape as the mixture of polyol and ISO mixed through the mixer 200 to be described later is dropped, so that the polyurethane foam is foamed and molded. It is a kind of framework to make it happen. Since the mixture is in a liquid state, the mold 100 is preferably manufactured so that the mixture dropped from the mixer 200 can easily flow in a predetermined shape and can be molded into a polyurethane foam having a desired shape.

In addition, in a preferred embodiment of the present invention, although not shown in the drawing, the mold 100 is preferably composed of several different sizes, and among them, a mold of a desired size can be used. This makes it possible to adjust the amount of polyol and ISO that can be introduced into the mixer 200 at a time by configuring the auxiliary tank 330 in the supply means 300 for supplying polyol and ISO to the mixer 200 to be described later. Therefore, the amount of polyol and ISO that varies depending on the size of the polyurethane foam can be easily and conveniently manipulated, while the amount of polyol and ISO required for molding the polyurethane foam of the desired size can be quickly supplied during the cream time when the polyurethane reaction occurs. because it can

In the mold 100 formed as described above, polyol and ISO are mixed through a mixer 200 as shown in [FIG. 4] to [FIG. 4], and the mixed mixture is dropped into the mold 100 to foam the polyurethane foam. make molding happen.

me. mixer

As shown in [Figs. 4] to [Fig. 6], the mixer 200 evenly spreads the mixture obtained by mixing the polyol and ISO supplied through the supply means 300 to be described later into the mold 100 and drops the mold ( 100) allows polyurethane foam to be foamed and molded.

As shown in FIGS. 4 to 6, the mixer 200 is installed to have a volume capable of receiving the maximum amount of polyol and ISO supplied through a supply means 300 to be described later and mixing them into a mixture. desirable.

In addition, the mixer 200 drops the mixture of polyol and ISO mixed in the mixer 200 into the mold 100 through a manual or automatic valve on the floor to foam and mold the polyurethane foam, so that the mixer 200 It is preferable to arrange and use such a mixture in the central part of the mold 100 so that it can drop down. Of course, when the mixer 200 molds the polyurethane foam having the same shape as a cuboid, it is preferable to foam and mold the polyurethane foam by allowing the mixture to drop downward while moving upward from the center of the bottom of the mold 100. However, when the polyurethane foam has a shape other than a rectangular parallelepiped, the polyol and ISO mixture must be dropped at a position where the mixture dropped through the mixer 200 can be filled while spreading evenly throughout the mold 100 along the inner shape of the mold 100. It will be easily known to anyone skilled in the art to which the present invention belongs.

To the mixer 200 configured as described above, polyol and ISO are supplied through the supply means 300, respectively, as shown in [FIG. 4] to [FIG. 6].

all. means of supply

As shown in FIGS. 4 to 6, the supply means 300 supplies the polyol and ISO to the mixer 200 described above, and in the mixer 200, a mixture of these polyols and ISO is mixed with the mold 100. ) to cause polyurethane reaction. At this time, the supply means 300 may be composed of two, respectively, so that polyol and ISO can be separately supplied to the mixer 200, and two auxiliary tanks 330 to one supply means 300 It may be configured to supply polyol and ISO to the mixer 200 using a different line for each auxiliary tank 330 by installing.

The supply means 300 includes a base 310, a stand 320, an auxiliary tank 330, and a pump 340, as shown in FIGS. 4 to 6.

1. Base

The base 310, as shown in [Figs. 4] to [Fig. 6], is equipped with casters 311 on the floor to be movable along the floor. At this time, the base 310 is for supporting another configuration to be described later, and is configured to sufficiently support the load so as not to fall. While the base 310 moves along the bottom surface on which the mold 100 is placed, the auxiliary tank 330, which will be described later, supplies polyol and ISO to the mixer 200, so that polyurethane foam having a desired size can be foamed and molded. let it be

2. stand

The stand 320 is installed on the base 310, as shown in [FIG. 4] to [FIG. 6]. At this time, the stand 320 is configured so that the height can be adjusted in the longitudinal direction, so that the auxiliary tank 330 installed on the stand 320 is positioned on the mixer 200 described above, so that the desired amount of polyol or ISO to be supplied to the mixer 200. It is preferable to use a stand 320 that can be stretched in the longitudinal direction, such as a cylinder, but is not limited thereto, and a configuration in which rotational motion is changed into a straight line using a rack-pinion or the like is also possible.

3. Auxiliary tank

The auxiliary tank 330 is mounted on the above-described stand 320, as shown in FIGS. 4 to 6. At this time, the auxiliary tank 330 is the polyol or ISO filled in the auxiliary tank 330 on the mixer 200 through the above-described rolling operation of the base 310 and the above-described vertical height adjustment of the stand 320. is formed in a position where it can be dropped into the mixer 200. Accordingly, the auxiliary tank 330 has a flow control valve that operates manually or automatically at the bottom, and when the auxiliary tank 330 is located in the mixer 200, polyol or ISO at a predetermined flow rate is supplied through the flow control valve. It is preferable to configure so that it can be supplied into the mixer 200.

At this time, between the auxiliary tank 330 and the stand 320, as shown in [Figs. 4] to [6], by connecting through an arm 331, the mixer 200 usually placed at the center of the mold 100. ) It is preferable to configure the position adjustment to be made easily so that the auxiliary tank 330 can be located above.

In a preferred embodiment of the present invention, the auxiliary tank 330 is preferably manufactured in a size capable of accommodating the flow rate of polyol and ISO required when molding the polyurethane foam having the largest size among the molds 100 described above. do. This is because when the mold 100 is selected according to the size of the polyurethane foam to be molded, the amount of polyol and ISO required in the selected mold 100 is dropped and mixed into the mixer 200 at once to react with polyurethane. This is to ensure that a sufficient amount of polyol and ISO can be supplied before the end of the process.

4. Pump

The pump 340 is for supplying polyol or ISO to the auxiliary tank 330, as shown in [FIGS. 4] to [FIG. 6]. The pump 340 uses a capacity capable of sufficiently supplying the amount of polyol and ISO required for molding the largest polyurethane foam in the mold 100 within a predetermined time. As described above, when the auxiliary tank 330 has a capacity to store a sufficient amount of polyol and ISO, the required amount of polyol and ISO according to the size of the mold 100 can be supplied to the mixer 200 at once. in order to have

As described above, the present invention prepares several molds to mold polyurethane foam of different sizes, prepares a mixer capable of mixing polyol and ISO with a capacity to mold polyurethane foam of the largest size, and then , By configuring the auxiliary tank to supply the desired amount of polyol and ISO to the mixer at once, it is possible to supply more polyol and ISO at once for a set time (cream time) required for polyurethane foam molding, resulting in a larger Polyurethane foam can be molded (approximately 40% more stock solution can be supplied from the existing stock solution of 35 to 40 kg, so a larger polyurethane foam can be molded by that much).

100: mold
200: mixer
300: supply means
310: base
320: stand
330: auxiliary tank
340: pump

Claims (2)

Several molds 100 configured according to the size of the polyurethane foam block; In a polyurethane foam molding machine including a mixer 200 for receiving and mixing polyol and diisocyanate (hereinafter referred to as 'ISO') at a predetermined ratio,
The supply means 300 is configured to supply the polyol and ISO to the mixer 200, respectively,
The supply means 300,
base 310 with casters 311;
a stand 320 installed on the base 310 and capable of height adjustment in the longitudinal direction;
an auxiliary tank 330 installed on an arm 331 extending from the stand 320 and positioned above the mixer 200; and
Polyurethane foam molding apparatus comprising a; pump 340 for supplying a certain amount of polyol and ISO using a pump.
In paragraph 1,
The mixer 200,
Polyurethane foam molding apparatus, characterized in that arranged to drop a mixture of polyol and ISO supplied through the supply means 300 to the mold 100 while moving up and down in the middle position of the mold 100.

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