JP5652213B2 - Dynamic mixer - Google Patents

Description

The present invention is used for agitation of the resin, in particular fiber-reinforced resin regarding (F iber R einforced P lastics, hereinafter referred to as FRP.) Suitable dynamic mixers to resin used for molding.

  A dynamic mixer is known as an apparatus that mixes two or more kinds of liquids in-line. This mixing apparatus has a structure in which the liquid flowing from two or more flow paths is passed through one casing, and the liquid is stirred and mixed by a stirring blade connected to a rotating shaft. This rotating shaft passes through a hole provided in the casing and is connected to a rotation drive source provided outside, and a sealing mechanism is provided between the rotating shaft and the hole in the casing to maintain airtightness inside the casing. It is common that When the liquid to be used is of a type that cures by mixing, if the liquid mixture stays and adheres to the seal part of this seal mechanism, the resin hardens at the seal part and lubricates the sliding surface of the seal. There is a problem that the supply of the liquid serving as the agent is interrupted and the sliding surface of the seal portion is damaged, resulting in a seal failure.

  As a countermeasure against this, a method of filling the periphery of the sealing mechanism with gas so that the mixed solution does not adhere to the portion of the sealing mechanism can be considered. However, when the resin is injected into the mold at a high pressure, such as injection molding of a thermosetting resin, the space in the casing is also compressed by the high pressure, and the resin is filled. In order to prevent air bubbles from being mixed, when the resin is injected and molded after the inside of the mold and the casing of the mixing apparatus are in a vacuum state, the casing is completely filled with the resin when the resin is injected at a high pressure. For this reason, it was difficult to avoid the mixture from adhering to the seal mechanism.

  Therefore, in order to remove the resin adhering to the seal mechanism, a method has been proposed in which the inside of the casing including the seal portion is cleaned with a cleaning liquid such as an organic solvent at an appropriate timing. As a result, the liquid serving as the lubricant on the sliding surface of the seal is lost, and eventually the sealing function is deteriorated in a short period of time.

  In order to solve this problem, Patent Document 1 divides the flow path of the main agent and the curing agent so that the mixed solution does not reach the seal member, and the curing agent inlet is disposed at a position where the curing agent does not reach the seal portion during stirring. A mixer is disclosed. The structure of the mixer impeller and casing is shaped so that the cleaning liquid can easily flow in, and a technique that enables cleaning in a short time is disclosed. However, after being used once, the casing is empty by cleaning. Therefore, when used again, the curing agent flows backward and reaches the seal portion and adheres. Furthermore, since the inside of the casing is washed after use, when it is reused, if it is stirred so that the main agent and the curing agent do not mix, the seal portion is dry and there is a problem that the seal function is deteriorated due to wear. .

Japanese Patent Laid-Open No. 2003-144887

  An object of the present invention is to use a dynamic mixer that supplies thermosetting resin, etc., stably without any trouble of poor sealing over a long period of time, even if the sealing mechanism in the device is in a severe usage environment. It is to provide a possible dynamic mixer.

In order to achieve the above object, the present invention employs the following means:
(1) at least a casing;
A rotating shaft rotatably fitted to one end of the casing via a sliding member;
One or a plurality of stirring blades detachably attached to the rotating shaft;
Multiple inlets,
An outlet provided at the other end opposite to one end of the casing;
A dynamic mixer consisting of
A first flow path forming member is attached to an inner wall of the casing, and a second flow path forming member is attached to the rotating shaft, and an outer edge portion of the second flow path forming member is the first flow path forming. Provided outside the outer edge of the member and on one end side of the casing,
The first flow path forming member and the second flow path forming member are detachably attached,
At least one of the inflow ports is provided on one end side of the casing from the outer edge of the first flow path forming member, and the other inflow port is provided on the other side of the casing from the outer edge of the first flow path forming member. A dynamic mixer characterized in that it is provided on the end side.
(2) at least a casing;
A rotating shaft rotatably fitted to one end of the casing via a sliding member;
One or a plurality of stirring blades detachably attached to the rotating shaft;
Multiple inlets,
An outlet provided at the other end opposite to one end of the casing;
A dynamic mixer consisting of
A first flow path forming member is attached to an inner wall of the casing, and a second flow path forming member is attached to the rotating shaft, and an outer edge portion of the second flow path forming member is the first flow path forming. Provided outside the outer edge of the member and on one end side of the casing,
At least one of the inflow ports is provided on one end side of the casing from the outer edge of the first flow path forming member, and the other inflow port is provided on the other side of the casing from the outer edge of the first flow path forming member. Is provided on the end side of the
The cleaning liquid is introduced from at least one inlet of the other inlet provided so as to be positioned between the outer edge of the second flow path forming member and the casing.
A dynamic mixer characterized by that.
( 3 ) The dynamic mixer according to ( 2 ), wherein an inlet of the cleaning liquid is installed facing an outer edge of the second flow path forming member.
( 4 ) Any of (1) to (3) above, wherein the flow path formed by the first flow path forming member and the second flow path forming member is substantially S-shaped . Dynamic mixer described in 1.
( 5 ) The ( 1 ), wherein the second flow path forming member is attached to one end side of the casing from the stirring blade attached to one end side of the casing. The dynamic mixer according to any one of to (4) .
( 6 ) The dynamic mixer according to ( 5 ), wherein an outer edge portion of the second flow path forming member has a bent portion toward the first flow path forming member.
( 7 ) The dynamic mixer according to any one of (1) to ( 6 ), wherein one end portion of the casing is an upper surface of the casing and the rotation shaft is provided substantially vertically.
( 8 ) The dynamic mixer according to any one of (1) to ( 7 ), wherein the fluid flowing into the dynamic mixer is a main component of a reactive curable resin, a curing agent, and a cleaning liquid.
( 9 ) The dynamic mixer as described in ( 8 ) above, wherein the main agent flows in from the inflow port provided on one end side of the casing from the outer edge of the first flow path forming member.
(1 0 ) The dynamic mixer according to any one of (1) to ( 9 ), wherein a temperature control device is attached to the casing.
(1 1 ) The dynamic mixer according to any one of (1) to (1 0 ), wherein the sliding member is a mechanical seal.

  According to the present invention, in a dynamic mixer for supplying a thermosetting resin or the like, even if the sealing mechanism in the apparatus is in a harsh usage environment, it can be used stably for a long time without occurrence of a sealing failure. A possible dynamic mixer can be obtained.

It is a schematic sectional drawing of embodiment of the dynamic mixer in this invention. It is a schematic sectional drawing in other embodiment of the dynamic mixer in this invention. It is a schematic sectional drawing in other embodiment of the dynamic mixer in this invention.

  Hereinafter, preferred embodiments of the dynamic mixer of the present invention will be described with reference to the drawings. Specifically, the case where a reaction curable resin is mixed using a dynamic mixer will be described. In addition, this invention is not restrict | limited at all by the following description.

  FIG. 1 is a schematic sectional view showing an embodiment of the dynamic mixer of the present invention. The apparatus mainly includes a casing 10, a sliding member 20, a rotating shaft 30, a stirring blade (40a to 40e), an inlet (50a to 50c), an outlet 60, a first flow path forming member 70, a second. The flow path forming member 80. Hereinafter, the details of each part will be described.

  The casing 10 mainly serves as a container for retaining the reaction curable resin.

  When the rotary shaft 30 is used in the casing 10, the sliding member 20 serves as a seal for sliding the rotary shaft 30 to lubrication and preventing the liquid mixture in the casing 10 from leaking out.

  The rotating shaft 30 fixes a stirring blade for mixing the main agent 55 and the curing agent 56, and has one end connected to the motor 31, and serves to transmit the rotation of the motor to the stirring blade.

  The stirring blades (40a to 40e) serve to mix the main agent 55 and the curing agent 56, and one or a plurality of stages are fixed to the rotating shaft.

  The inflow ports (50a to 50c) serve to cause the main agent 55, the curing agent 56, and the cleaning liquid 57 to flow into the casing 10, and the inflow ports (50a to 50c) are supplied from a tank that supplies the main agent 55, the curing agent 56, and the cleaning liquid 57. 50c) is provided with valves (51a to 51c) for opening and closing the flow channel and pumps (52a to 52c) for feeding each liquid, and the flow rate is adjusted as necessary. Adjust and turn on / off each liquid.

  One of the inflow ports 50a is provided on one end side (the side on which the sliding member 20 is provided) of the casing 10 from the outer edge of the first flow path forming member 70, and the other inflow port 50b. , 50c is provided on the other end side of the casing 10 (side on which the outflow port 60 is provided). By specifying the position of the inflow port in this way, the fluid flowing in from the inflow port 50a is retained in the region 71 formed by the first flow path forming member 70 and the second flow path forming member 80. In addition, the liquid flowing in from the other inflow port can be prevented from easily flowing into the region 71, and unexpected mixing can be prevented in the casing 10 (particularly in the region 71 from the vicinity of the liquid level 58 described later). it can. As a result, it is possible to prevent occurrence of a sealing failure caused by curing due to adhesion of the mixed liquid to the sliding member 20.

  The outflow port 60 serves to send out the mixed liquid stirred by the stirring blades (40a to 40e) in the casing 10 to the outside of the casing 10, and a flow path is connected to the flow path connected to the outflow port 60. A valve (51d) for opening and closing is provided.

  The first flow path forming member 70 plays a role of forming a region 71 in which the main agent 55 that has flowed into the casing 10 is filled with only the main agent, and a flow path for feeding the mixed region 81 of the main agent and the curing agent. Become. The first flow path forming member 70 is attached to the inner wall of the casing 10 and has a structure that can be freely attached and detached.

  The second flow path forming member 80 serves to keep the main agent 55 that has flowed into the casing 10 in the region 71 filled with only the main agent, and the flow at the time of feeding into the mixing region 81 of the main agent and the curing agent. It becomes a road. The second flow path forming member 80 is attached to the rotary shaft 30 and has a structure that can be freely attached and detached. The positional relationship between the first flow path forming member 70 and the second flow path forming member 80 is such that the outer edge of the second flow path forming member 80 is outside the outer edge of the first flow path forming member 70. And it is located in the sliding member 20 side in the casing 10. As a result, a substantially S-shaped flow path is formed, and when the region 71 is filled with the main agent 55, the main agent 55 is discharged to the outlet on the mixed region 81 side of the main agent 55 and the curing agent 56 of the substantially S-shaped flow channel. A liquid level 58 is formed. The liquid level 58 becomes a lid when the curing agent 56 flows backward, and plays a role of preventing the mixed liquid from reaching the sliding member 20. Further, since the region 71 filled only with the main agent 55 can be filled with the flow passage formed by the first flow passage forming member 70 and the second flow passage forming member 80, the sliding member 20 is always lubricated. It is possible to leave.

  As for the material of the casing 10 and the stirring blade 40, those which are not affected by corrosion or deterioration depending on the kind of the mixed liquid or the cleaning liquid are preferable. For the stirring blade 40, stainless steel, iron, aluminum or the like is preferable. It is also preferable that a plating process is performed. In the casing 10, it is preferable that the material is the same as the material of the stirring blade 40, and glass is also preferable because the state during stirring can be confirmed.

  In the dynamic mixer, it is preferable that the rotation shaft 30 is provided substantially vertically. As described above, in order to form the liquid level 58 of the main agent 55 by the first flow path forming member 70 and the second flow path forming member 80, if the rotary shaft 30 is substantially vertical, the liquid level 58 is It is formed substantially uniformly, and the main agent 55 can be prevented from flowing out to the mixing region 81. Further, if the rotating shaft 30 is substantially vertical when flowing the mixed liquid, the mixed liquid can flow naturally by gravity without providing an extra mechanism.

  The reaction curable resin is stirred as follows by the dynamic mixer having the above-described parts. First, the inside of the casing 10 is depressurized by connecting a flow path downstream from the valve (51d) to a vacuum line (not shown) so that bubbles do not remain in the reaction curable resin. When a certain degree of vacuum is reached, the motor 31 is started and the rotating shaft 30 and the stirring blades (40a to 40e) are rotated. At the same time, the pumps (52a, 52b) are started, and the main agent 55 and the curing agent 56 flow into the casing 10 from the inflow ports (50a, 50b). The inflowed main agent 55 flows through the flow path formed by the first flow path forming member 70 and the second flow path forming member 80 and flows into the main agent / curing agent mixing region 81, and the stirring blades (40 a to 40 e). ) And the hardener 56. The stirred mixed liquid is discharged through the outlet 60 and the valve (51d). After a certain amount of the main agent 55 and the curing agent 56 are agitated and discharged as a mixed liquid, the flow path downstream from the valve (51d) is switched to a waste line, the valves (51a, 51b) are closed, and the valve (51c ) Is opened, and the cleaning liquid 57 is caused to flow into the casing 10 from the inlet (50c) by the pump (51c). At that time, the stirring blades (40a to 40e) are kept rotated. After completion of the cleaning, the valve (51c) is closed. Then, the cleaning liquid in the casing 10 flows down due to gravity, air flows in from the waste line side, and the mixing region 81 is filled with air. However, the liquid level 58 of the main agent 55 formed by the first flow path forming member 70 and the second flow path forming member 80 is unchanged during the cleaning operation, that is, the region 71 is maintained in a state filled with the main agent 55. doing. Thereafter, the inside of the casing 10 is again evacuated, the valves (51a, 51b) are opened, and the main agent 55 and the curing agent 56 are introduced again. Even after restarting, since the region 71 remains filled only with the main agent 55, the curing agent 56 does not enter the region 71, and the sliding member 20 is also kept lubricated by the main agent 55. This also prevents the sealing function from deteriorating.

  In the form shown in FIG. 1, the inlet (50 a) of the main agent 55 is provided laterally with respect to the casing 10, but on the sliding member 20 side from the outer edge of the first flow path forming member 70. Any orientation is acceptable. However, in view of the flow and the like when flowing into the casing 10, it is preferably downward or sideways. Further, the main agent 55 is introduced from the inlet (50a), but it may be opposite to the curing agent 56.

  The stirring blades (40a to 40e) preferably have a structure in which the main agent 55 and the curing agent 56 can be mixed quickly and uniformly. Specifically, a propeller type, a paddle type, a flat paddle type, and a turbine type are preferable. The number of steps and the shape are not limited to this, and can be appropriately set depending on the shape of the casing.

  The sliding member 20 is preferably a member that slides with the rotating shaft and does not leak liquid in the casing 10. A mechanical seal is more preferable.

  The inlet 50c of the cleaning liquid 57 is preferably directed downward from the casing so that the mixed liquid of the main agent 55 and the curing agent 56 can be cleaned without leakage. When the inflow port 50c is provided so as to be positioned between the outer edge portion of the second flow path forming member and the casing, the inside of the casing 10 can be efficiently cleaned. In particular, when the inflow port 50 c is installed so as to face the outer edge of the second flow path forming member 80, it is formed by the first flow path forming member 70 and the second flow path forming member 80. When the resin adhering to the peripheral portion of the liquid surface 58 of the main agent 55 (the resin adhering to the main agent 55 and the curing agent 56 is fixed) can be reliably removed, and when the mixing of the main agent 55 and the curing agent 56 is resumed. In addition, the main agent 55 can be supplied in a predetermined amount without clogging. Further, if the inflow port 50c is installed so that the cleaning liquid 57 is not mixed with the main agent 55, when the mixing of the main agent 55 and the curing agent 56 is resumed, a desired mixed liquid can be supplied immediately after the supply, It is more preferable from the point that the amount of waste can be reduced.

  Although not shown, it is also preferable that a temperature control function is attached to the casing. When a reaction curable resin is stirred, if the temperature rises, the curing of the resin is promoted during the stirring, so the temperature is set appropriately according to the properties of the stirred reaction curable resin and the molded product to be supplied. Preferably it can be done. In addition, when there is an injection valve or the like after stirring, it is possible to shorten the temperature increase time of the injection valve by raising the temperature in advance. There is no restriction | limiting in particular in an attachment method, It is possible to wrap around the casing outer periphery or to embed. It is preferable that the temperature of the entire casing can be adjusted uniformly.

  FIG. 2 shows a schematic cross-sectional view of a casing in another embodiment of the dynamic mixer according to the present invention. As in FIG. 1, the first flow path forming member 70 and the second flow path forming member 80 have a positional relationship capable of forming a liquid surface that can keep the main agent 55 in the region 71 filled with only the main agent. That's fine. In particular, when the flow of the curing agent 56 to the region 71 filled only with the main agent is extremely prevented or when the viscosity of the curing agent is very low and easily flows, the first flow path forming member 70 as shown in FIG. When the flow path formed by the second flow path forming member 80 has a labyrinth shape, inflow is easily prevented. More preferably, the first flow path forming member 70 and the second flow path forming member 80 are configured with the minimum number of bendings.

  Further, as in another embodiment shown in FIG. 3, the inflow port (50b) for the curing agent 56 and the cleaning liquid 57 can be made common. Even if the apparatus is simplified in this manner according to the properties of the fluid to be introduced, the same effect as that of the dynamic mixer as shown in FIG. 1 is exhibited.

The present invention can be applied to all mixers in which a plurality of liquids, powders, and the like are mixed in addition to the two types of reaction curable resins.

10 Casing 20 Sliding member 30 Rotating shaft 31 Motors 40a, 40b, 40c, 40d, 40e Stirring blades 50a, 50b, 50c Inlet 51a, 51b, 51c, 51d Valve 52a, 52b, 52c Pump 55 Main agent 56 Curing agent 57 Cleaning fluid 58 Liquid level 60 Outflow port 70 First flow path forming member 71 Area filled only with main agent 80 Second flow path forming member 81 Mixed area of main agent and curing agent

Claims (11)

At least the casing,
A rotating shaft rotatably fitted to one end of the casing via a sliding member;
One or a plurality of stirring blades detachably attached to the rotating shaft;
Multiple inlets,
An outlet provided at the other end opposite to one end of the casing;
A dynamic mixer consisting of
A first flow path forming member is attached to an inner wall of the casing, and a second flow path forming member is attached to the rotating shaft, and an outer edge portion of the second flow path forming member is the first flow path forming. Provided outside the outer edge of the member and on one end side of the casing,
The first flow path forming member and the second flow path forming member are detachably attached,
At least one of the inflow ports is provided on one end side of the casing from the outer edge of the first flow path forming member, and the other inflow port is provided on the other side of the casing from the outer edge of the first flow path forming member. A dynamic mixer characterized in that it is provided on the end side. At least the casing,
A rotating shaft rotatably fitted to one end of the casing via a sliding member;
One or a plurality of stirring blades detachably attached to the rotating shaft;
Multiple inlets,
An outlet provided at the other end opposite to one end of the casing;
A dynamic mixer consisting of
A first flow path forming member is attached to an inner wall of the casing, and a second flow path forming member is attached to the rotating shaft, and an outer edge portion of the second flow path forming member is the first flow path forming. Provided outside the outer edge of the member and on one end side of the casing,
At least one of the inflow ports is provided on one end side of the casing from the outer edge of the first flow path forming member, and the other inflow port is provided on the other side of the casing from the outer edge of the first flow path forming member. Is provided on the end side of the
The cleaning liquid is introduced from at least one inlet of the other inlet provided so as to be positioned between the outer edge of the second flow path forming member and the casing.
A dynamic mixer characterized by that. 3. The dynamic mixer according to claim 2, wherein an inlet of the cleaning liquid is installed facing an outer edge of the second flow path forming member. The dynamic mixer according to any one of claims 1 to 3, wherein a flow path formed by the first flow path forming member and the second flow path forming member is substantially S-shaped. The said 2nd flow-path formation member is attached to the one end part side of a casing from the said stirring blade attached to the one end part side of the said casing, The any one of Claims 1-4 characterized by the above-mentioned. dynamic mixer according to any. The dynamic mixer according to claim 5 , wherein an outer edge portion of the second flow path forming member has a bent portion toward the first flow path forming member. Dynamic mixer according to any one of claims 1 to 6, one end of the casing is a casing upper surface, wherein the rotation axis is provided substantially vertically. The fluid flowing into the dynamic mixer, dynamic mixer according to any one of claims 1 to 7, base and curing agent in the reaction-curable resin, characterized in that the cleaning liquid. The dynamic mixer according to claim 8 , wherein the main agent flows from the inflow port provided on the one end side of the casing from the outer edge portion of the first flow path forming member. Dynamic mixer according to any one of claims 1 to 9, characterized in that temperature control device is attached to the casing. Dynamic mixer according to any one of claims 1 to 1 0, characterized in that said sliding member is a mechanical seal.

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