JP3651940B2 - Horizontal mixer - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a horizontal mixer of a curable polymer composition comprising a main agent and a curing agent that can be downsized without damaging a seal portion.
[0002]
[Prior art]
In general, in a horizontal mixer of a two-component reaction type material in which a stirring blade shaft is placed horizontally, a supply port for the main agent and a curing agent to the mixing chamber is provided on the side where the bearing portion of the stirring blade shaft is provided, and after mixing The liquid mixture outlet is provided at the end opposite to the bearing portion. However, the bearing portion of the stirring blade shaft is provided with a seal portion to prevent the supply liquid from entering, and this seal portion generates frictional heat, so that the mixed liquid supplied to the mixing chamber is caused by the frictional heat. There was a problem that the curing reaction was accelerated and the sealing function of the seal portion was lowered.
[0003]
As a countermeasure to solve this problem, the main solution and the hardener supply port for the mixing chamber are largely separated from each other with respect to the axial direction of the stirring blade shaft so that the mixed liquid after mixing does not come into contact with the seal portion. That's fine. However, if the main agent supply port and the curing agent supply port are separated from each other in the axial direction of the stirring blade shaft, useless space increases.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide a horizontal type mixer comprising a main component and a curing agent which are compact in structure and do not damage the seal portion of the stirring blade shaft in a horizontal mixer in which the stirring blade shaft is placed horizontally. It is to provide a mixer.
[0005]
[Means for Solving the Problems]
The present invention that achieves the above-mentioned object is characterized in that a stirring blade shaft placed horizontally in a mixing chamber is pivotally supported on a bearing portion provided on one side of the mixing chamber via a seal portion, and the main component is provided at the end of the mixing chamber on the bearing portion side. In the horizontal mixer provided with two supply ports for respectively discharging the curing agent and the mixing chamber end opposite to the bearing portion side, one of the two supply ports The discharge direction is inclined toward the bearing portion with respect to the direction perpendicular to the stirring blade axis, and the other discharge direction is inclined toward the discharge port with respect to the direction perpendicular to the stirring blade axis. It is what.
[0006]
Thus, of the two supply ports of the main agent and the curing agent, one discharge direction is inclined to the bearing side with respect to the direction perpendicular to the stirring blade shaft, and the other discharge direction is perpendicular to the stirring blade shaft. The mixing position of the two liquids of the main agent and the curing agent is the seal part even if both supply ports are made in a compact arrangement close to the axial direction of the stirring blade axis by inclining the mixed liquid to the discharge port side with respect to the direction. Can be away from As a result, the liquid mixture does not come into contact with the seal portion, so that the seal portion is not damaged and the seal function can be maintained for a long time.
[0007]
Further, in the above configuration, a forced biasing mechanism that directs the supply liquid to the discharge port side in the vicinity of the supply port on the side where the discharge direction is inclined to the mixed solution discharge port side with respect to the direction perpendicular to the stirring blade axis If this is provided, the above-described effect of preventing damage to the seal portion can be further improved.
In addition, when a hard filler such as fine powder silica is contained in one of the main agent and the curing agent, the supply liquid on the side containing the hard filler is added to the direction perpendicular to the stirring blade axis. By discharging from the supply port whose discharge direction is inclined toward the liquid discharge port side, the hard filler will not enter the seal part, and the seal part and stirring blade shaft will not be scraped off. Allows long-term maintenance of functions.
[0008]
【Example】
Hereinafter, the present invention will be described with reference to embodiments shown in the drawings.
FIG. 1 shows a horizontal mixer according to an embodiment of the present invention, in which 1 is a cylindrical mixing chamber and 2 is a stirring blade shaft. The stirring blade shaft 2 is cantilevered by a bearing portion 3 so that the stirring blade 2a is placed horizontally in the mixing chamber 1 and the other end is connected to a drive source (not shown). A seal portion 4 is provided at the boundary between the mixing chamber 1 and the bearing portion 3 so that the liquid in the mixing chamber 1 does not enter the bearing portion 3.
[0009]
On the outer peripheral wall of the cylindrical mixing chamber 1 on the bearing portion 3 side, supply ports 5 and 6 for the main agent and the curing agent are provided via check valves 8 and 9, respectively. Further, a mixed liquid discharge port 7 is provided at the end of the mixing chamber 1 on the side opposite to the bearing portion 3. The main agent is supplied to one of the two supply ports 5 and 6, and the curing agent is supplied to the other. One supply port 5 is inclined toward the bearing portion 3 with respect to a direction in which the discharge direction is perpendicular to the stirring blade shaft 2, and the other supply port 6 is a direction in which the discharge direction is perpendicular to the stirring blade shaft 2. In contrast to the discharge port 7 side.
[0010]
As described above, the two supply ports 5 and 6 are arranged such that the discharge directions are away from each other in the opposite directions, so that both the supply ports 5 and 6 are disposed close to each other in the axial direction of the stirring blade shaft 2. Even if it is made, the position where the two liquids of the main agent and the curing agent are first mixed can be a position that is considerably separated from the seal portion 4 on the downstream side in the axial direction.
Therefore, not only the mixed liquid of the main agent and the curing agent does not contact the seal portion 4, but also the curing reaction is promoted by the frictional heat of the seal portion 4, and the sealing function of the seal portion 4 is not deteriorated. Further, since the positions of both supply ports 5 and 6 are arranged as close as possible to the axial direction of the stirring blade shaft 2, the axial length is shortened, and the apparatus can be made very compact. .
[0011]
Further, the main agent and the curing agent supplied to the mixer of the present invention may contain a hard filler having polishing properties such as wet silica as an extender in either one of them. Thus, when an abrasive hard filler is blended in the supply liquid, the supply liquid on the side where the filler is blended may be discharged from the supply port 6. By discharging the supply liquid from the supply port 6 side inclined to the discharge port 7 in this way, the supply liquid containing the hard filler does not enter the seal portion 4, and the seal portion 4 and the stirring blade The shaft 2 is not scraped off by the abrasive and the sealing function is not deteriorated at an early stage.
[0012]
In the horizontal mixer of the present invention described above, if a forcible urging mechanism for forcibly directing the supply liquid discharged from the supply port 6 inclined toward the mixed solution discharge port 7 to the discharge port 7 is provided, the seal The damage prevention effect of the part can be further improved.
2 to 6 exemplify a horizontal mixer according to the present invention provided with such a forced biasing mechanism.
[0013]
The forced urging mechanism shown in FIG. 2 forms a bowl-shaped inclined surface 20 a on a disc 20 on the stirring blade shaft 2 provided close to the discharge port of the supply port 6, and this inclined surface 20 a is used as the discharge port 7. It is comprised so that it may face. The inclined surface 20a acts to prevent the supply liquid discharged from the supply port 6 from flowing into the seal portion 4 and to urge the supply liquid toward the discharge port 7.
[0014]
The forced urging mechanism shown in FIG. 3 forms a vertical surface 21 a on the disc 21 on the stirring blade shaft 2 provided close to the discharge port of the supply port 6, and this vertical surface 21 a faces the discharge port 7. It is comprised as follows. This vertical surface 21a also acts to prevent the supply liquid discharged from the supply port 6 from flowing into the seal portion 4 and to urge it toward the discharge port 7 side.
[0015]
The forced urging mechanism shown in FIG. 4 forms the inner peripheral wall of the mixing chamber 1 on a conical inclined surface 22 whose radius decreases toward the seal portion 4 at a portion close to the discharge port of the supply port 6. In addition, the outer peripheral surface of the disk 23 facing the conical inclined surface 22 is formed in a conical shape. This forcible urging mechanism urges the supply liquid in the outer peripheral direction by the centrifugal force by the disc 23 and performs the action of forcibly urging the supply liquid toward the discharge port 7 by the conical slope 22.
[0016]
The forced biasing mechanism shown in FIG. 5 has the same inclined surface 22 as in the embodiment of FIG. 4, but this inclined surface 22 is limited to the inner peripheral wall surface on the side where the supply port 6 opens. Is.
Further, the forced urging mechanism shown in FIG. 6 is provided with a screw 23 a on the outer periphery of a disk 23 provided on the stirring blade shaft 2 so as to correspond to the supply port 6. By this screw mechanism, the liquid mixture can be directed toward the discharge port 7 and can be prevented from flowing into the seal portion 4.
[0017]
The horizontal mixer according to the present invention described above is particularly effective when applied to a relatively small mixer having a small mixing capacity of 500 cc or less. In particular, it is effective when applied as a mixing means for a curable silicone rubber composition containing fine powdered silica. Moreover, when mixing the curable polymer composition which made the mixing ratio of a main ingredient and a hardening | curing agent substantially 1: 1, a remarkable effect can be exhibited. Moreover, it is more effective when mixing the thing of the range of 10-50000 centipoise as a viscosity of a main ingredient and a hardening | curing agent.
[0018]
The curable polymer composition comprising the main agent and the curing agent used in the present invention is a mixture of the main agent and the curing agent, which is left at room temperature, or when heated, the crosslinking reaction proceeds to increase the viscosity. A composition that cures and cures. Either a room temperature curable polymer composition or a thermosetting polymer composition may be used, and either a rubber-like one after curing or a hard resin-like one may be used.
[0019]
Typical examples of such curable polymer compositions include curable silicone compositions, polyurethane resin compositions, epoxy resin compositions, unsaturated polyester resin compositions, silane-modified polyether compositions, polysulfide compositions, and the like. . Among these, a curable silicone composition is particularly preferable.
The curable silicone composition includes (A) (a) an organopolysiloxane having two or more alkenyl groups in one molecule, (b) a reinforcing filler, and (c) a main component mainly composed of a platinum-based catalyst. And (B) (d) an organohydrogenpolysiloxane containing two or more silicon-bonded hydrogen atoms in one molecule, and a curing agent mainly composed of the reinforcing filler (b), The composition which can be hardened | cured if this mixture (A) and (B) both components are mix | blended and this mixture is heated, and becomes a rubber-like elastic body, ie, a thermosetting silicone rubber composition, can be mentioned.
[0020]
Such a thermosetting silicone rubber composition is known in the art as an addition reaction curable silicone rubber composition. When such a thermosetting silicone rubber composition is heated to 50 ° C. or higher, curing is accelerated and a silicone rubber molded article such as a silicone rubber gasket is obtained.
When the thermosetting silicone composition is such as to form a foam, the above-mentioned main agent or curing agent may be a foaming component known as a foaming imparting component of a silicone rubber foam, for example, two or more foams per molecule. An organopolysiloxane having a silanol group and other organic foaming agents can be used.
[0021]
In addition, as the alkenyl group-containing organopolysiloxane of component (a) in the main agent, dimethylpolysiloxane blocked with dimethylvinylsiloxy groups at both ends, dimethylsiloxane-methylphenylsiloxane copolymer blocked with dimethylvinylsiloxy groups at both ends, Examples thereof include a dimethylsiloxane-methylphenylsiloxane-methylvinylsiloxane copolymer blocked with a terminal dimethylvinylsiloxy group, and a dimethylsiloxane-methylvinylsiloxane copolymer blocked with both ends of a trimethylsiloxy group. The viscosity of these components (a) is preferably 100 to 100,000 centipoise at 25 ° C.
[0022]
The reinforcing filler of component (b) is blended to increase the mechanical strength of the cured product of the thermosetting silicone rubber composition. For example, fine powder silica such as dry silica, wet silica, Examples thereof include carbon black and colloidal calcium carbonate.
Examples of the platinum-based catalyst as component (c) include chloroplatinic acid, chloroplatinic acid dissolved in alcohol or ketones, and soot compounds of chloroplatinic acid and alkenylsiloxane, diketone and the like.
[0023]
Further, as the organohydrogenpolysiloxane of component (d) in the curing agent, methylhydrogenpolysiloxane blocked with both ends trimethylsiloxy group, dimethylsiloxane-methylhydrogensiloxane copolymer blocked with both ends trimethylkiloxy group, Examples thereof include a dimethylsiloxane-methylhydrogensiloxane copolymer having both ends of a methylhydrogensiloxy group blocked. The viscosity of the component (d) is preferably 1 to 10,000 centipoise at 25 ° C.
[0024]
The blending amount of the component (d) is such that the molar ratio of the total amount of silicon-bonded hydrogen atoms in the component (d) and the total amount of all alkenyl groups in the component (a) is (0.5 to 1). ) :( 20: 1) is preferred. When this ratio is smaller than (0.5: 1), it is difficult to obtain good curing, and when this ratio exceeds (20: 1), the curing speed is too high and handling becomes difficult.
[0025]
Furthermore, as the curable silicone composition, (A ′) (e) an organopolysiloxane blocked with both ends of a silatyl group, (b) a reinforcing filler, (c) a main agent mainly composed of a condensation reaction accelerating catalyst; B ') (f) comprising a hydrolyzable group-containing organosilane or organosiloxane oligomer, and (b) a curing agent comprising a reinforcing filler as a main component. These (A') and (B ') both components Examples of the composition which can be cured and become a rubbery elastic body by mixing and leaving this mixture at room temperature, that is, a room temperature curable silicone rubber composition. Such room temperature curable silicone rubber compositions are well known in the art.
[0026]
【The invention's effect】
As described above, in the horizontal mixer according to the present invention, one of the two supply ports of the main component and the curing agent of the curable polymer composition has one discharge direction on the bearing side with respect to the direction perpendicular to the stirring blade axis. Since the other discharge direction is inclined to the mixed solution discharge port side with respect to the direction perpendicular to the stirring blade shaft, both supply ports may be arranged close to each other in the axial direction of the stirring blade shaft. The two liquids can be prevented from mixing in the vicinity of the seal portion. As a result, the seal portion is prevented from being damaged by the adhesion of the hardened liquid mixture, so that the seal function can be maintained for a long time.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a horizontal mixer according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of a horizontal mixer according to another embodiment of the present invention.
FIG. 3 is a longitudinal sectional view of a horizontal mixer according to still another embodiment of the present invention.
FIG. 4 is a longitudinal sectional view of a horizontal mixer according to still another embodiment of the present invention.
FIG. 5 is a longitudinal sectional view of a horizontal mixer according to still another embodiment of the present invention.
FIG. 6 is a longitudinal sectional view of a horizontal mixer according to still another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mixing chamber 2 Stirring blade axis | shaft 2a Stirring blade 3 Bearing part 4 Sealing part 5,6 Supply port 7 Outlet port 20,21,23 Disc 21a Vertical surface 20a, 22 Inclined surface

Claims (7)

Two stirring blade shafts placed horizontally in the mixing chamber are pivotally supported on a bearing portion provided on one side of the mixing chamber via a seal portion, and the main agent and the curing agent are respectively discharged to the mixing chamber end portion on the bearing portion side. In the horizontal mixer in which a supply port is provided and a mixed solution discharge port is provided at the end of the mixing chamber opposite to the bearing portion side, one of the two supply ports has a discharge direction as the stirring blade shaft. A curable polymer composition comprising a main agent and a curing agent that are inclined to the bearing portion side with respect to a vertical direction and the other discharge direction is inclined to the discharge port side with respect to a direction perpendicular to the stirring blade axis. Horizontal mixer. 2. The horizontal mixer according to claim 1, further comprising a forcible urging mechanism that urges the discharged supply liquid toward the discharge port in the vicinity of the supply port inclined in the discharge direction toward the discharge port. The horizontal mixer according to claim 2, wherein the forcible urging mechanism is configured by providing an inclined surface or a plane for directing the supply liquid toward the discharge port on a disk fixed to the stirring blade shaft. The horizontal mixer according to claim 2, wherein the forcible urging mechanism is configured by providing an inclined surface for directing a supply liquid toward the discharge port on an inner peripheral surface of the mixing chamber. The horizontal mixer according to claim 2, wherein the forcible urging mechanism is constituted by a screw mechanism for directing a supply liquid toward the discharge port. Either one of the main agent or the curing agent contains a hard filler, and the supply liquid containing the hard filler is inclined to the discharge port side with respect to the direction perpendicular to the stirring blade axis. The horizontal mixer according to claim 1, wherein the horizontal mixer is discharged from the supply port. The horizontal mixer according to any one of claims 1 to 6, wherein the thermosetting polymer composition comprising the main agent and the curing agent is a curable silicone composition containing a hard filler.

Images