JPH0699509A - Producing equipment for silicone foam - Google Patents

Abstract

PURPOSE:To provide a producing equipment for a silicone foam wherein a main agent and a hardening agent are uniformly mixed in a short time without foaming at a time for mixing and also the mixture is easily foamed in a short time when it is heated in the case of foaming. CONSTITUTION:A producing equipment for a silicone foam is constituted of a tank 1 for a main agent and a tank 2 for a hardening agent. These tanks are provided with motors 3, 4. After the main agent and the hardening agent are uniformly agitated respectively, the liquid of prescribed amount is weighed respectively by the automatically measuring discharge pumps 5, 6 and introduced into a mixer 10 through hoses 7, 8. The liquid is agitated in the mixer 10 and cooled by a cooler 11 and then passed through a liquid feed hose 23 and discharged from a nozzle 13. At this time, the liquid feed hose 23 is heated by a preheater 12. Temperature is controlled-by a temperature controller.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing a silicone foam, and more specifically, a base material and a curing agent are uniformly mixed in a short time without foaming during stirring and mixing, and moreover, they are heated during foaming. The present invention relates to an apparatus for producing a silicone foam which can be easily foamed in a short time and which does not require cleaning of the apparatus even if the processing is intermittent.

[0002]

2. Description of the Related Art Conventionally, a foam has been formed in a sealing portion in order to achieve air-tightness and liquid-tightness with the outside such as a lid for various electric equipment parts and various other containers, a waterproof case for automobiles, and the like. For example, as shown in FIG. 11, the lid 31 of the dustproof or waterproof case has a gasket foam 32 formed around the lid. FIG. 12 shows the cross-sectional view of FIG. 11, and the gasket foam 32 has dense closed cells.

There are various kinds of devices for forming such a foam. For example, in Japanese Patent Laid-Open No. 3-94876, a rotor having grooves formed on its surface is provided inside, and a nozzle is formed at a lower portion. A foamable polysiloxane composition consisting of two liquids of a main agent and a curing agent is separately sent to the mixed chamber to mix the two liquids, and the resulting mixed liquid is discharged from a nozzle to a sealing portion of a coated object, An apparatus for foaming and curing to form a gasket foam is described. When a foam is manufactured using such an apparatus, a long pot life of 30 seconds to 10 minutes causes gelation or increase in the mixing chamber. It is stated that the risk of sticking is low and that the curing time is as short as 3 to 30 minutes to obtain the final product in a short time, so that no curing space is required.

[0004]

However, when the apparatus described in the above publication is used, the pot life of the non-heatable expandable polysiloxane composition consisting of two liquids of the main agent and the curing agent is from 30 seconds. Since it is 10 minutes, there is a serious drawback in terms of work efficiency that the inside of the mixing chamber and nozzle of the coating apparatus must be washed with a solvent every time this mixture is applied to the member to be coated once.

That is, when the apparatus described in the above publication is used with a non-heated expandable polysiloxane composition,
During the cycle in which the composition is mixed in the mixing chamber and discharged from the nozzle to the member, the setting of the member, the movement of the mixing chamber to the coating position, the lowering of the mixing chamber, the start of tracing,
Trace completion-rise of the mixing chamber-return to the origin of the mixing chamber-waiting until the next member is set-there is a mixed composition remaining in the mixing chamber and in the nozzle before moving to the next cycle. May be foamed, and in order to prevent this, it has to be removed by solvent washing every cycle.

Even if the above-mentioned one cycle is carried out within the pot life, there is a composition that stays beyond the pot life during several cycles, so that the step of solvent cleaning for each cycle is carried out. The reality is that we cannot omit it. Especially when there is a problem in the coating process or when it is necessary to adjust the device, it is necessary to wash from the mixing chamber to the nozzle,
Therefore, there is a problem that the loss of the coating liquid is large and the working efficiency is poor in terms of time.

Furthermore, when the non-heated expandable polysiloxane composition of the above publication is used, it is necessary to keep the time from mixing to discharging for a short time because the pot life is short. It is necessary to directly attach the discharge nozzle to the bottom of the mixing chamber, and therefore, in the actual coating operation, for example, when the NC operation is used, the mixing chamber with the discharge nozzle should be fixed and the member to be coated. Since it is necessary to move and apply the material, the member mounting table must be large in size, let alone with a plurality of nozzles pulled out from the mixing chamber, it is not possible to simultaneously perform the coating work on two or more member mounting tables. Absolutely impossible.

Therefore, the inventors of the present invention can control the length of the pot life of the foamable mixture as needed, and once the foam is to be formed, it quickly and densely foams to easily foam. As a result of studying a foam manufacturing apparatus including the steps from the sending of the main agent and the curing agent to the formation of the foam by using the mixture having the function of forming the body, the use of the heat-foamable mixture and the dynamic By adding a cooling device to the mixer or using a static mixer, and further combining a pre-heating device for the mixture before discharge, the heat-foamable mixture as in the former is agitated and mixed by a dynamic mixer with a cooling device, or a static mixer is used. Since it is mixed with a mixer, the main agent and the curing agent are uniformly mixed in a short time without foaming at the time of mixing,
Moreover, since the preheating device such as the latter is introduced, it has been found that the foaming can be easily performed in a short time when the foaming is heated, and the present invention has been completed based on this finding.

[0009]

The object of the present invention is to uniformly mix the main agent and the curing agent in a short time and without foaming during mixing.
Moreover, it is an object of the present invention to provide an apparatus for producing a silicone foam that can easily foam in a short time when heated during foaming.

[0010]

The above objects of the present invention can be achieved by the inventions (1) to (3) below.

(1) A tank into which a main agent and a curing agent are separately introduced, an automatic metering discharge pump for delivering a predetermined amount of each of the main agent and the curing agent, and a mixture of the main agent and the curing agent. Of the mixer, a liquid feed hose extending from the mixer, and a discharge nozzle at the tip of the liquid feed hose, and further, these are in communication with each other, and the discharge nozzle is passed through the respective devices. In a silicone foam manufacturing apparatus having a heating device for heating a heat-foamable silicone mixture of a discharged main agent and a curing agent, a preheating device is provided around the liquid supply hose leading from the mixer to the discharge nozzle. An apparatus for producing a silicone foam, which is provided.

(2) The mixer comprises a dynamic mixer, a cooling device is provided on the outer periphery of the dynamic mixer, a projection is provided on the inner wall of the dynamic mixer, and a central portion of the dynamic mixer is provided. An agitating device having at least two agitating blades that are arranged and have a blade extending in a cross direction on the axis, and the agitating blade is disposed between the protrusions in the height direction and rotated. An apparatus for producing a silicone foam according to (1) above.

(3) The apparatus for producing a silicone foam according to (1) above, wherein the mixer is a static mixer.

The present invention will be described in more detail below. The present invention obtains a heat-foamable silicone composition in which a main agent and a curing agent are agitated in a mixer to be uniformly mixed. However, even when mixing by such agitation, substantially no foaming occurs, followed by preheating. By heating with a device (hereinafter referred to as a preheating device), foaming is performed in a short time to obtain a foam.

In the present invention, when a static mixer is used as a mixer, a cooling device is not required,
A heat-foamable silicone composition was obtained by uniformly mixing the main agent and the curing agent with a mixer, but the foaming did not substantially occur during mixing by such stirring, and the composition was then heated with a preheating device. To foam in a short time to obtain a foam.

Further, in the present invention, when a dynamic mixer is used as a mixer, a cooling device is attached to the dynamic mixer, and a preheating device is provided on at least a part of the liquid feeding hose from the dynamic mixer to the nozzle. And the curing agent can be uniformly mixed in a short time without foaming at the time of mixing, and further, it is possible to easily foam in a short time when heated during foaming. .

The foamable silicone composition used in the present invention is one that foams by heat. The silicone foam obtained from this is excellent in heat resistance, cold resistance, insulation properties, and also excellent in weather resistance, water resistance, and safety and hygiene, and is therefore preferably used. The silicone foam is composed of an organopolysiloxane compound, which is formed by the reaction of a base material and a curing agent.

As the main agent used in the present invention, it is preferable to use an organopolysiloxane having a substituent such as a silanol group or an alkenyl group in the molecule. As an example of the main agent, a composition containing a polyalkyl (C 1 to C 20) siloxane as a main component, silicon dioxide, a platinum compound, and carbon black is used.

The curing agent used in the present invention is preferably organohydrogenpolysiloxane. An example of the curing agent is polyalkyl (having 1 to 20 carbon atoms).
A mixture of siloxane, polyalkyl (C1-18) hydrogen siloxane, and silicon dioxide is used. As the curing catalyst, generally known platinum-based catalysts, organotin-based catalysts,
A curing catalyst such as an aminoxy-based catalyst is used.

In the present invention, the mixing ratio of the main agent and the curing agent is used in a wide range, but preferably the addition amount of the curing agent is 3 to 100 equivalents per equivalent of the reactive group (eg alkenyl group) in the main agent. Yes, more preferably 20 to 70 equivalents.

The mixer used in the apparatus for producing a silicone foam of the present invention is not particularly limited, and both a dynamic mixer and a static mixer can be used. Preferably a dynamic mixer,
More preferably, a cooling device is provided on the outer periphery of the dynamic mixer. Various types of stirring blades are used for the mixer, for example, Maruzen issue,
"Kirk-Osmer Dictionary of Chemistry", 506, supervised by Jiro Shiokawa
Those described in the right column of the first page, line 1 to the right column of page 508, line 10 are used.

Further, the dynamic mixer is provided with a protrusion on the inner wall, and the dynamic mixer is
A stirring device having at least two stirring blades each having a shaft extending in the cross direction on its axis is arranged in the center thereof, and the stirring blades are arranged in the height direction between the protrusions so as to be rotated. ing. In the present invention, the mixer is cooled at the time of mixing the main agent and the curing agent, and the temperature of this cooling device is 0 ° C, although it depends on the type of the foamable composition.
-25 ° C, preferably 5 ° C-15 ° C.

As the static mixer used in the present invention, those usually used in the technical field of mixing are used. In this static mixer, the turbulent flow-generating elements are stacked in several stages in series. The present invention is characterized in that the liquid to be mixed is allowed to pass therethrough, and because the mixing portion is in a stationary state, power for mixing is not necessary and heat is not generated by mixing. It is preferably used for.

As the above-mentioned element, for example, multi-stage shelves or spiral blades are connected in point contact to each other, and a mixture to be mixed while the two liquids flow down or plates perforated alternately are provided in multi-stage. There are those in which the two liquids are mixed while passing through the holes, and those in which the two liquids are applied and mixed to a disc that rotates slowly.

Specifically, Japanese Patent Publication No. 44-8290, JP-A Nos. 58-128134, 59-166232, 60-139324, 62-42728 and 62.
-27029, 62-57634, 62-87.
No. 232 and No. 62-140631.

The mixture of the main agent and the curing agent, which is mixed while being cooled by the mixer, is guided to a nozzle through a liquid feeding (hereinafter also referred to as liquid feeding hose) hose, and the mixture is discharged from the nozzle. At this time, the mixture is heated by a preheating device, and then the mixture is discharged from a nozzle and applied to a member to be coated.

As a heating device in the preheating device, a heating body is wrapped around a liquid feeding hose and a temperature control device is attached, and the temperature is determined in consideration of the pot life of the foamable composition. Therefore, the heating is controlled so that the foaming temperature of the foamable composition is not exceeded.

In the nozzle, it is preferable that the liquid discharge surface at the tip of the nozzle is composed of at least two discharge holes, that is, pinholes. The number of pinholes depends on the size of the gasket at the application site. Is 2 to 8, preferably 3 to 5.

The liquid feed hose connected to the fixed mixing chamber may have an appropriate length, and the nozzle connected to the tip of the liquid feed hose is free by the length of the liquid feed hose. It can be operated conveniently, especially when performing NC operation.

The foamable mixture thus discharged is applied to a desired shape by, for example, NC operation. The applied foamable mixture takes a considerably long time to foam as it is, but foams with time to form a foam. However, in the present invention, since the foamable mixture to which this is applied requires a long time to foam in this state, it is heated to promote foaming, whereby foaming occurs in a short time to form a foam. To be done. The heating temperature is, for example, at least 60 ° C. within 5 minutes,
Further, at 80 ° C., it is preferable to foam within 3 minutes.

There are various conceivable heating modes, but there are a method of applying heated air, a method of passing or placing in a heated room, a method of passing through a dome having a heating device, and the like. Includes direct heating using a heater for nichrome wire, infrared rays, far infrared rays, and indirect heating for sending heated air.

The apparatus for producing a silicone foam of the present invention comprises:
Applied to various fields, such as packing for gas water heaters, water heaters, waterproof cases for electrical equipment, seals for required parts of automobiles, waterproof aluminum sashes for construction, isolation walls, soundproofing, prevention of sound generation, Used to form foam for sealing, such as for vibration prevention.

[0033]

The present invention will be described in more detail below with reference to examples, but the present invention is not limited thereto.

Example 1 FIG. 1 is a flow sheet showing a method for producing a silicone foam using the apparatus for producing a silicone foam of the present invention. The main agent tank A contains a main agent and a curing agent tank. A curing agent is put in B. Both are slowly stirred so that each liquid becomes homogeneous. For this stirring, it is preferable to use a stirring blade having a plurality of through holes in the blade.

The homogeneous base resin and curing agent thus obtained were weighed with a metering pump, and a predetermined amount (amount sufficient for coating) of the mixture (cooling) indicated by C at a ratio of 1: 1. It is sent to a mixing chamber where it is mixed so that the main component and the curing agent are sufficiently uniform. At this time, in the mixing chamber, the mixture is water-cooled in order to prevent a temperature increase due to stirring.

Then, this mixture is sent to a liquid feed hose (preheat) indicated by D and discharged from a discharge nozzle indicated by E attached to the tip of the liquid feed hose 4. Air is mixed into the mixture immediately after being discharged from the discharge nozzle E. The inclusion of this air results in a better foam. The mixture thus discharged is applied to the member to be coated.

The liquid feed hose D keeps a length that does not hinder the movable range of the discharge nozzle E, and the discharge nozzle E traces a previously read trajectory by interlocking with a control device. The mixture cooled by the mixture C is preheated while moving in the liquid feed hose D so that it easily foams when heated.

At the time of coating indicated by H, the members are aligned by F, and G is set at the coating position. The member to be coated applied by the application H is set in the heating furnace J, then introduced into the heating furnace J, and heated as indicated by K to obtain a foam. After the foaming is completed L, the member is taken out M. The foam thus obtained is not only dense and uniform, but also is sufficiently foamed due to the inclusion of air.

In the present invention, the above-mentioned silicone foam is manufactured using the manufacturing apparatus shown in FIG. 2.
1 is a schematic of a series of systems including the manufacturing apparatus of the present invention. Reference numeral 1 is a main agent tank, 2 is a curing agent tank, and these tanks are provided with motors 3 and 4, and uniformly stir the main agent and the curing agent, respectively.

Further, automatic metering and discharging pumps 5 and 6 are provided in the lower part of the tank, and a predetermined amount of the uniformly stirred liquid is introduced into the mixer 10 through the hoses 7 and 8.
Next, these liquids are agitated by the mixer 10, cooled by the cooler 11, and then discharged from the nozzle 13 through the liquid feed hose 23. At this time, the liquid feeding hose 23 is heated by the preheating device 12. The temperature control is performed by the temperature controller 27.

The apparatus for producing a silicone foam of the present invention comprises:
In particular, it is characterized in that the mixing device, that is, the mixing device 10 and the preheating device 12 are combined, and the mixing device 10 is more specifically shown in FIG. 3 is a perspective view of the mixing apparatus in the manufacturing apparatus of the present invention, FIG. 4 is a sectional view of a main part of the mixing apparatus, and FIG. 5 is a sectional perspective view in which a part of FIG. 3 is cut away. The figure is shown.

The main part of the manufacturing apparatus of the present invention is the mixer 10.
And a cooling device 11 and a preheating device 12. In FIGS. 4 and 5, the mixer 10 is arranged in the center of the cooler 11, and the outer surface of the mixer 10 and the inner surface of the cooler 11 are in close contact with each other to cool the mixer 10.

The mixing machine 10 mixes the main ingredient entered from the main ingredient injection port 104 with the stiffening blade 103 and the hardener entered from the hardener injection inlet 105, in order to make the mixing sufficiently and uniform. Protrusions 102 are provided on the inner wall of the mixer 10, and the stirring blades 103 are arranged in the height direction between the protrusions so as to rotate. The protrusion 102 is arranged on the inner wall by the stirring blade 10.
It may be arranged at any position as long as it does not come into contact with 3, but it is preferably arranged in a line in the height direction.

When the mixer 10 is not used for a long time, it has a cleaning liquid inlet 18 for preventing the base material and the curing agent from reacting and foaming. (See FIG. 3) From the cleaning liquid inlet 18, the cleaning liquid and air are introduced simultaneously or alternately to clean the inside of the mixer.

In the case of producing a silicone composition in which a base material and a curing agent are mixed and foamed by heating, when vigorously agitated by a mixer having the above-mentioned protrusions, frictional heat is generated at the time of agitation. A cooler 11 is placed over the mixer 10 for removal. The cooler 11 has a double structure having a cylindrical shape, and water is allowed to flow as a cooling medium in the space. The container body of the mixer 10 is arranged in this central portion.

The cooler 11 enters from the cooling water inlet 111 and cools the outer periphery of the mixer 10 and is discharged from the upper cooling water outlet. The foamable silicone composition thus mixed in the mixer 10 having the cooler 11 moves from the lower portion to the discharge nozzle through the liquid feed hose. Since the foamable silicone composition has been cooled, when it is applied to the object to be coated as it is, it takes time to foam, which is not preferable in terms of work efficiency. Therefore, it is preheated so as to easily foam. FIG. 6 shows a perspective view of the preheating device 12.

In the preheating device 12, the nichrome wire 25 is provided on the tape-shaped elongated object 26, and the nichrome wire 25 may be installed on the surface or inside thereof. As shown in FIG. 7, this preheating device 12 is used by being wound around a liquid feeding hose 23, and is further connected with a temperature controller 27. (See FIG. 2) There are various forms of the preheating device 12, and the preheating device 12 is not limited to this example.
Besides, a heater for high frequency heating, far infrared ray, or the like may be used.

Example 2 In FIG. 3, cooling water was not circulated through the cooler 11,
A foam was formed in the same manner as in Example 1. Since the heat-foamable silicone composition was used, a slight amount of foaming was observed due to the generation of heat during stirring, but foaming to this extent did not hinder the execution of the process, and the mixture was sufficiently stirred.
Therefore, it was preheated before being discharged from the nozzle to be sufficiently foamed, and a good foamed body was obtained in a short time.

Example 3 In FIG. 3, foaming was performed in the same manner as in Example 1 except that the static mixer described in JP-A-58-128134 was used in place of the mixer 10 with the cooler 11. Formed body. The static mixer used had the structure shown in FIGS. 8, 9 and 10.

That is, FIG. 8 is a plan view of the static mixer, and the mixer 40 is one in which spiral blades 41 are integrally formed in a short passage pipe 42. FIG. 9 is a sectional view taken along line I-II of the mixer 40. In this mixer 40, six are stacked as shown in the sectional view of FIG. 10 to form a static mixer while axially displacing the contact edges of adjacent blades 41 to form a predetermined angle. used.

Liquid feed hoses (not shown) were connected to the inlet and outlet of this static mixer. The foamable silicone composition was mixed with this static mixer and preheated before being discharged from the nozzle to produce a foam. Since a static mixer was used as a mixer of this foaming device and preheating was performed before discharging from the nozzle, a good foam was obtained in a short time.

[0052]

According to the present invention, the heat-expandable silicone composition is used, and the foaming device in which the dynamic mixer and the cooler are combined is used. Therefore, the heat generated during mixing can be immediately cooled. Therefore, foaming during mixing can be suppressed. Further, since the preheating is performed before the ejection from the nozzle, there is an excellent effect that good foaming can be performed in a short time. Further, since the foaming apparatus of the present invention uses the heat-foamable silicone composition and combines the static mixer and the preheating device provided before discharging from the nozzle, economically favorable foaming can be performed in a short time. It has an excellent effect.

Further, since the foaming apparatus of the present invention uses the heat-foamable silicone composition and combines the dynamic mixer, the cooler, and the preheating device provided before discharging from the nozzle, the silicone composition is easily foamed by heat. It is possible to sufficiently control the substance, that is, the main agent and the curing agent are uniformly mixed in a short time without foaming at the time of mixing, and easily and shortly when heated during foaming after coating on the object to be coated. Can be foamed in time.

[Brief description of drawings]

FIG. 1 is a flow sheet showing a method for producing a foam.

FIG. 2 is a perspective view showing an outline of an apparatus for producing a silicone foam according to the present invention.

FIG. 3 is a perspective view showing a mixing device which is a main part of the present invention.

FIG. 4 is a cross-sectional view showing a mixing device which is a main part of the present invention.

FIG. 5 is a cross-sectional perspective view showing a mixer which is an essential part of the present invention.

FIG. 6 is a perspective view showing a preheating device which is a main part of the present invention.

FIG. 7 is a perspective view showing a place where a preheating device, which is a main part of the present invention, is installed.

FIG. 8 is a plan view showing a static mixer used in the present invention.

FIG. 9 shows the static mixer shown in FIG.
It is sectional drawing cut | disconnected along the I-II line.

FIG. 10 is a cross-sectional view showing a static mixer used in the present invention.

FIG. 11 is a perspective view showing a gasket foam provided on the lid.

FIG. 12 is a cross-sectional view of a gasket foam provided on the lid of FIG.

[Explanation of symbols]

1 Main Agent Tank 27 Temperature Controller 2 Curing Agent Tank 31 Lids 3, 4, 9 Motor 32 Gasket Foam 5, 6 Automatic Metering Discharge Pump 40 Mixer 7, 8 Liquid Feed Hose 41 Spiral Blade 10 Mixer 42 Short Length Passage pipe 11 Cooler 43 Fluid passage 12 Preheating device 101 Mixing container 13 Discharge nozzle 102 Protrusion 14 Nozzle needle 103 Stirring blade 15 Painted material 104 Main agent injection port 16, 17 Cooling hose 105 Hardener injection port 18 Cleaning liquid hose 111 Cooling water inlet 19 Painted object 112 Cooling water outlet 20, 21, 22 Cock I-II Cutting line 23 Liquid feed hose A Main agent tank 24 Motor shaft B Hardener tank 25 Nichrome wire a, b Fluid 26 Tape-like long object

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[Procedure amendment]

[Submission date] November 10, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

The present invention will be described in more detail below.
The present invention obtains a heat-foamable silicone composition in which a main agent and a curing agent are agitated in a mixer to be uniformly mixed. However, even when mixing by such agitation, substantially no foaming occurs, followed by preheating. The formation of the foam is promoted by heating with a device (hereinafter referred to as a preheating device), and the foam is obtained by foaming in a short time during heating after coating .

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

Further, in the present invention, when a static mixer is used as a mixer, a heat-foamable silicone composition in which a main component and a curing agent are agitated by the mixer and uniformly mixed without using a cooling device. However, substantially no foaming occurred even during such mixing by stirring, and the subsequent heating with a preheating device promoted the formation of the foamed product, and
When heated after the cloth is foamed, a foam is obtained in a short time.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0022

[Correction method] Change

[Correction content]

Further, the dynamic mixer has a projection provided on the inner wall thereof, and the dynamic mixer has a stirring device having at least two stirring blades each having a blade extending in a cross direction on a shaft center and arranged in a central portion thereof. ,
The stirring拌羽roots is adapted to rotate is disposed between the protrusion and the protrusion in the height direction. In the present invention, the mixer is cooled when mixing the main agent and the curing agent, and the temperature of this cooling device depends on the type of the foamable composition.
The temperature is 0 ° C to 25 ° C, preferably 5 ° C to 15 ° C. ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] November 12, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0040

[Correction method] Change

[Correction content]

Further, automatic metering and discharging pumps 5 and 6 are provided at the lower part of the tank, and a predetermined amount of the uniformly stirred liquid is carried into the mixer 10 through the hoses 7 and 8. Next, these liquids are agitated by the mixer 10, cooled by the cooler 11, and then discharged from the nozzle 13 through the liquid feed hose 23. At this time, the liquid feeding hose 23 is heated by the preheating device 12. The temperature control is performed by the temperature controller 27. Nozzle 13 is NC
Operates freely by operation, but when nozzle 13 is fixed
If it is necessary, it is necessary to move the coating material 15 by NC operation.
is there. Therefore, the nozzle 13 is moved or the application 1
Whether to move 5 should be done depending on the size of the installation location.
You can

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B29L 31:26 4F

Claims (3)

[Claims] 1. A tank into which a main agent and a curing agent are separately introduced, an automatic metering discharge pump for delivering a predetermined amount of each of the main agent and the curing agent, and a mixture for mixing the main agent and the curing agent. It has a mixer, a liquid feed hose extending from the mixer, and a discharge nozzle provided at the tip of the liquid feed hose. Further, these are in communication with each other and discharged from the discharge nozzle through the respective devices. In a manufacturing apparatus of a silicone foam having a heating device for heating a heat-foamable silicone mixture of a main ingredient and a curing agent, a preheating device is provided around a liquid feed hose leading from the mixer to a discharge nozzle. An apparatus for producing a silicone foam, which is characterized in that 2. The mixer comprises a dynamic mixer, a cooling device is provided on the outer periphery of the dynamic mixer, a protrusion is provided on the inner wall of the dynamic mixer, and the protrusion is provided at the center of the dynamic mixer. And a stirring device having at least two stirring blades each having a blade extending in a cross direction on its axis, the stirring blades being disposed between the protrusions in the height direction and being rotated. The apparatus for producing a silicone foam according to claim 1, which is characterized in that. 3. The apparatus for producing a silicone foam according to claim 1, wherein the mixer is a static mixer.