JP2008155476A - Vacuum injection method of two-liquid mixed resin material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum injection method of two-liquid mixed resin material capable of suppressing the influence of problem in cleaning with a solvent. <P>SOLUTION: In the vacuum injection method of the two-liquid mixed resin material, the two-liquid mixed resin material is respectively supplied and mixed in a mixer for performing agitation and mixing by a power transmission from a power mixer unit 1, and injected in the inside of a vacuum chamber 9 in a vacuum state through a mixer nozzle 5 having an opening/closing valve. A non-cleaning mixer 2 is set in a disposable material shape, and the non-cleaning mixer 2 is exchanged with non-cleaning when cleaning a device with the solvent. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention belongs to the technical field of a vacuum injection method for a two-component mixed resin material by a non-cleaning method.

2. Description of the Related Art Conventionally, a valve opening / closing mechanism has an injection port for injecting resin into a mold disposed in a vacuum vessel, a valve for opening / closing a resin flow passage to the injection port, and a valve opening / closing mechanism for driving the valve. However, it is provided in a vacuum vessel to prevent a vacuum leak that occurs during resin injection (see, for example, Patent Document 1).
JP 2004-122471 A (page 2-6, full view)

  Conventionally, when the device stops, it is necessary to discharge the resin so that it does not harden in the device. If the stop time is short, it can be dealt with by throwing away, When the time is long or depending on the physical properties of the resin material, washing with a solvent is necessary to prevent curing in the apparatus. However, there was a problem with solvent cleaning.

This point will be described in detail.
In solvent cleaning, the effects on the human body due to handling cleaning liquids such as organic solvents and the environmental effects associated with waste liquid treatment are problems.
Further, in the solvent cleaning, there is a problem that the cost loss such as the discharge of the resin material, the purchase cost of the cleaning liquid, the processing cost of the waste liquid is large due to the cleaning.
Furthermore, since the backing that the cleaning liquid can be completely removed from the inside of the apparatus cannot be removed, there is a possibility that the cleaning liquid may be mixed into the resin material, and the influence on the quality cannot be completely denied.
Furthermore, if the resin material is hardened in the apparatus due to insufficient cleaning, it takes a long time to restore, and cost loss is a serious problem.
Thus, there was a problem with solvent cleaning.
Further, in the case of the two-component mixed resin, the handling inside the apparatus becomes complicated, and this problem has become more serious.

  The present invention has been made paying attention to the above-mentioned problems, and an object of the present invention is to provide a vacuum injection method of a two-component mixed resin material capable of suppressing the influence of the problem in solvent cleaning. .

  In order to achieve the above object, in the present invention, the two liquid resin materials are respectively supplied and mixed into a mixer that performs stirring and mixing by power transmission from the apparatus main body, and is brought into a vacuum state via a nozzle having an on-off valve. In the vacuum injection method of the two-component mixed resin material to be injected into the container, the mixer is set in a disposable material shape, and the mixer is replaced without washing when the apparatus is solvent-washed. Features.

  Therefore, in this invention, the influence of the problem in solvent cleaning can be suppressed.

  Hereinafter, an embodiment for realizing a vacuum injection method of a two-component mixed resin material of the present invention will be described based on Examples 1 to 4 corresponding to the inventions according to claims 1 and 2.

First, the configuration will be described.
FIG. 1 is a partial cross-sectional explanatory view of a two-liquid mixed injection apparatus for carrying out a vacuum injection method for a two-liquid mixed resin material of Example 1. FIG.
As shown in FIG. 1, the two-component mixing / injecting apparatus of Example 1 includes a power mixer unit 1, a non-washing mixer 2, a mixer nozzle joining holder 3, a seal packing 4, a mixer nozzle 5, a valve unit 6, a mixer guide 7, An O-ring 8, a vacuum chamber 9, a work 10, a seal rubber 11, and a mount 12 are the main components.

The power mixer unit 1 takes in two types of resin materials to be mixed, agent A and agent B separately, supplies them to the non-cleaning mixer 2, and supplies power for mixing the two liquids to the non-cleaning mixer 2. .
The non-cleaning mixer 2 has a mixer body 21 having a space inside, a wide opening at the top, and a narrow opening at the bottom. Further, the mixer body 21 has a rotating shaft 22 extending vertically and a stirring blade 23 provided on the rotating shaft 22, and the stirring blade 23 is rotated by power transmission from the power mixer unit 1. The internal space is agitated.
Furthermore, it is desirable that the non-cleaning mixer 2 is made of a material that is disposable. An example is made of resin such as PP.

The mixer nozzle joining holder 3 includes a fastening portion 31 having an annular lower surface and a tubular side portion, a mixer attachment portion 32 attached to the lower outer periphery of the non-cleaning mixer 2, and a nozzle attachment portion 33 attached to the upper end portion of the mixer nozzle 5.
The fastening portion 31 is further fastened to the mixer attachment portion 32 attached to the lower outer periphery of the non-cleaning mixer 2 by screwing, so that the lower surface of the fastening portion 31 is attached to the lower surface of the non-cleaning mixer 2 at the upper end of the mixer nozzle 5. In addition, the upper surface of the nozzle mounting portion 33 is pressed against and fastened.

The seal packing 4 seals the contact surface when the upper surface of the nozzle mounting portion 33 attached to the mixer nozzle 5 is pressed against the lower surface of the non-cleaning mixer 2 by the mixer nozzle joining holder 3. .
The mixer nozzle 5 has a shape that extends downward from the lower end of the non-cleaning mixer 2 and has a shape that engages the lower end against the mixer guide 7. The inside is provided with a liquid path for sending the mixed liquid from the non-cleaning mixer 2 into the vacuum chamber 9. Further, the internal liquid path of the mixer nozzle 5 is provided with an on-off valve that operates with an external driving force.

The valve unit 6 is a control unit that operates the open / close valve of the mixer nozzle.
The mixer guide 7 is provided in the upper hole portion of the vacuum chamber 9, contacts the lower end of the mixer nozzle 5, determines the lower end position of the mixer nozzle 5, and guides the mixed liquid from the mixer nozzle 5 into the vacuum chamber 9. .

The O-ring 8 seals the contact portion between the mixer guide 7 and the vacuum chamber 9.
The vacuum chamber 9 covers the upper surface of the gantry 12 and has a space inside. The internal space is evacuated by a vacuum pump or the like (not shown) to bring the internal space into a vacuum state.

The workpiece 10 is a workpiece that is placed inside the vacuum chamber 9, receives a mixed liquid from above, and is subjected to vacuum injection such as filling a necessary part with a mixed liquid of two liquids.
The seal rubber 11 seals the contact portion between the vacuum chamber 9 and the upper surface of the gantry 12.
The gantry 12 is an operation part for performing the vacuum injection, and the vacuum chamber 9 is provided on the plane that is the upper surface, the workpiece 10 is installed, and the vacuum injection operation is performed.

Next, the structure of the mixer nozzle joining holder 3 portion of the mixer nozzle 5 will be described in more detail.
FIG. 2 is an explanatory view of a mixer nozzle joining holder portion. FIG. 3 is a cross-sectional explanatory view of a mixer nozzle joining holder portion.

As shown in FIGS. 2 and 3, the upper portion of the mixer attachment portion 32 of the mixer nozzle joining holder 3 is substantially C-shaped, that is, has a structure with a slit in the circumference, and is tightened in the radial direction by fastening screws. Thus, the structure is attached to the lower outer periphery of the non-cleaning mixer 2.
A screw groove is provided on the outer periphery of the lower portion of the mixer mounting portion 32, and the tubular side portion of the fastening portion 31 of the mixer nozzle joining holder 3 is fastened thereto by screwing.
Further, a nozzle mounting portion 33 having a tubular and wide bowl-shaped upper surface is screwed to the upper end portion of the mixer nozzle 5.
An annular groove is provided on the upper surface, and the seal packing 4 is disposed. When the fastening portion 31 is fastened, the annular lower surface of the fastening portion 31 presses the upper surface of the nozzle mounting portion 33 attached to the mixer nozzle 5 upward to contact the lower surface of the non-cleaning mixer 2, and the seal packing 4 is compressed. It is a structure that seals in a state.

The operation will be described.
[Conventional two-component mixed injection device]
A conventional two-component mixed injection device will now be described.
FIG. 4 is an explanatory view of a conventional two-component mixed injection apparatus.
In the conventional two-liquid mixing and injection apparatus, the mixer 50 is made of metal as the apparatus main body, and has a structure in which the liquid mixture is sent to the inside of the vacuum chamber by the liquid feeding hose 51.

[Two liquid mixture injection action]
In the two-liquid mixing / injecting apparatus of Example 1, first, two liquid resin agents, for example, the A agent and the B agent are sent to the power mixer unit 1 and the non-washing mixer 2 by a pump mechanism (not shown). Agitated and mixed by the agitating blades 23 inside the non-cleaning mixer 2 by driving, and is quantitatively discharged by the power mixer unit 1.
The discharged mixed liquid is sent to the open / close valve of the mixer nozzle 5. The on-off valve controlled by the valve unit 6 is interlocked with the discharge operation of the power mixer unit 1, opens simultaneously with the discharge of the power mixer unit 1, and discharges the liquid mixture to the workpiece 10 in the vacuum chamber 9. In addition, at the same time when the discharge of the power mixer unit 1 is finished, the valve is closed and the discharge of the mixed liquid is stopped.

[Non-cleaning action of mixer]
In the first embodiment, when washing with a solvent is performed due to a long time operation stop or due to the physical properties of the resin agent, the non-cleaning mixer 2 is made disposable, the mixer nozzle joining holder 3, the seal packing 4, the mixer nozzle 5, the valve unit 6, the mixer guide 7, and the O-ring 8 may be washed.

In the power mixer unit 1 shown in FIG. 1, that is, the apparatus main body side, if the non-cleaning mixer 2 is made disposable, it is not necessary to perform cleaning.
Therefore, the influence and loss by solvent cleaning can be greatly suppressed. In addition, regarding the response when the resin material is cured in the device, the problem can be solved by replacing the non-cleaning mixer 2 in the device body, so the cured resin is removed by disassembling the mixer portion of the device body as in the past. Therefore, it is possible to prevent a large loss from being reassembled.

Next, the effect will be described.
In the vacuum injection method of the two-component mixed resin material of Example 1, the effects listed below can be obtained.

(1) Mixer nozzle 5 having an open / close valve by supplying and mixing two liquid resin materials into a mixer for stirring and mixing by power transmission from the power mixer unit 1
In the vacuum injection method of the two-component mixed resin material injected into the vacuum chamber 9 through the vacuum, the non-cleaning mixer 2 is set in a disposable material shape, and no cleaning is performed when the device is solvent-cleaned. Since the mixer 2 is replaced without washing, the influence of problems in solvent washing can be suppressed.

Further, detailed operational effects for suppressing the influence of problems in solvent cleaning will be described below.
The vacuum injection method of the two-component mixed resin material of Example 1 has the effect of reducing the initial cost, which reduces the manufacturing cost of the apparatus by eliminating the cleaning mechanism on the apparatus main body side. Conventionally, a solvent is required as a large amount of cleaning liquid. However, in Example 1, it is not necessary to clean the mixer portion, and only a small amount of resin material attached to the components is removed. This reduces running costs.

  Conventionally, since a solvent is used as a large amount of cleaning liquid, it is necessary to treat the waste liquid. However, in Example 1, since the amount is small, generation of the waste liquid can be suppressed. This also reduces the running cost. Moreover, it is preferable that the amount of the solvent used is small because the influence on the human body and the environment can be greatly reduced.

  Furthermore, conventionally, when the mixed solution is cured inside the apparatus, it takes a long time to restore, but in Example 1, it can be restored in a short time for replacing the non-cleaning mixer 2. This reduces running costs. When further explaining here, in the mixer part which mixes and stirs two liquids, the case where a continuous process is stopped by hardening tends to occur. In that case, in Example 1, it can restore | restore only by replacement | exchange of the non-washing mixer 2, and the other part can respond by discarding. This point is very advantageous.

  Conventionally, when cleaning the inside of the apparatus, particularly the mixer part, it is difficult to confirm whether or not the cleaning liquid and the melted residue of the resin material have been completely removed. 1 can be dealt with by exchanging the non-cleaning mixer 2, so there is no influence on the quality and the quality of the vacuum injection can be improved.

  (2) A mixer nozzle joining holder 3 for connecting the non-cleaning mixer 2 and the mixer nozzle 5 in a sealed state, and a mixer guide 7 for connecting the mixer nozzle 5 and the vacuum chamber 9 in a sealed state are provided. When cleaning the solvent, the solvent can be easily cleaned, preventing incomplete cleaning. If the resin hardens, it can be easily removed, and the entire device can be disassembled and reassembled. It is easy to suppress the influence of problems in solvent cleaning.

Example 2 is an example in which the O-ring is used as the sealing method for the non-cleaning mixer 2 and the nozzle attachment portion 33 of the mixer nozzle joining holder 3 in the vacuum injection method of the two-component mixed resin material.
FIG. 5 is a cross-sectional explanatory view of a mixer nozzle joining holder portion of the second embodiment.
The configuration will be described.
In the second embodiment, the seal of the contact surface between the lower surface of the non-cleaning mixer 2 and the upper surface of the nozzle mounting portion 33 of the mixer nozzle joining holder 3 is changed from the seal packing 4 to the O-ring 41.
Since other configurations are the same as those of the first embodiment, description thereof is omitted.

The operation will be described.
The O-ring 41 is a variety of commercially available products, has good availability, and is inexpensive. Compared with the seal packing 4, the sealing performance is slightly inferior, but there are cases where the specification is established by selection of the material and dimensions, and there is a possibility of use for injection with a particularly low degree of vacuum.

Explain the effect.
The second embodiment has the following effects in addition to the effects (1) and (2).
(3) Since the O-ring 41 is used for sealing the nozzle mounting portion 33 of the non-cleaning mixer 2 and the mixer nozzle joining holder 3, the cost can be further suppressed and the influence of problems in solvent cleaning can be suppressed.
In this respect, it is advantageous to reduce the cost effect when the non-cleaning mixer 2 used by disposable is discarded together when the O-ring is stuck and separation is difficult.
Since other functions and effects are the same as those of the first embodiment, description thereof is omitted.

Example 3 is an example in which the O-ring is used as the sealing method of the non-cleaning mixer 2 and the mixer nozzle joining holder 3 in the vacuum injection method of the two-component mixed resin material, and sealing is performed in the radial direction.
FIG. 6 is a cross-sectional explanatory view of a mixer nozzle joining holder portion of the third embodiment.
The configuration will be described.
In the third embodiment, the mixer nozzle joining holder 3 is configured integrally as shown in FIG. 6, an annular groove is provided on the inner peripheral surface, and the O-ring 42 is disposed.
The inner periphery of the mixer nozzle joining holder 3 and the outer periphery of the non-cleaning mixer 2 are sealed with an O-ring 42.
Since other configurations are the same as those of the first embodiment, description thereof is omitted.

The operation will be described.
As in the third embodiment, the mixer nozzle joining holder 3 may have an integral structure. In this case, this radial seal is advantageous if the vertical position of the non-cleaning mixer 2 is allowed.
Further, similarly to the second embodiment, the O-ring 42 is a variety of commercially available products, has good availability, and is inexpensive. Compared with the seal packing 4, the sealing performance is slightly inferior, but there are cases where the specification is established by selection of the material and dimensions, and there is a possibility of use for injection with a particularly low degree of vacuum.

Explain the effect.
Example 3 has the following effects in addition to the effects (1) and (2).
(4) Since the O-ring 42 is used while the seal between the non-cleaning mixer 2 and the mixer nozzle joining holder 3 is used as a radial seal, the cost can be further suppressed and the influence of problems in solvent cleaning can be suppressed.
The third embodiment is advantageous in that it is easy to separate the O-ring of the non-cleaning mixer 2 that is used disposable and the mixer nozzle joining holder 3 that performs cleaning.
Since other functions and effects are the same as those of the first embodiment, description thereof is omitted.

Example 4 is an example in which the sealing method of the non-cleaning mixer 2 and the mixer nozzle joining holder 3 in the vacuum injection method of the two-component mixed resin material is an O-ring, and sealing is performed on both the outer periphery and the bottom surface of the non-cleaning mixer 2. It is.
FIG. 7 is a cross-sectional explanatory view of the mixer nozzle joining holder portion of the fourth embodiment.
The configuration will be described.
In the fourth embodiment, the mixer nozzle joining holder 3 is configured integrally as shown in FIG. 7, an annular groove is provided on the inner peripheral surface, and the O-ring 42 is disposed.
Further, an annular groove is provided in an annular flat surface portion that contacts the lower surface of the non-cleaning mixer 2, and the seal packing 43 is disposed (see FIG. 7A). Or you may arrange | position the O ring 44 (refer FIG.7 (b)).
The inner periphery of the mixer nozzle joining holder 3 and the outer periphery of the non-cleaning mixer 2 are sealed with an O-ring 42, and the annular surface of the mixer nozzle joining holder 3 and the bottom surface of the non-cleaning mixer 2 are sealed with a seal packing 43 or an O-ring 44. It is a structure to seal with.
Since other configurations are the same as those of the first embodiment, description thereof is omitted.

The operation will be described.
In Example 4, it can be set as a junction part with high sealing performance by sealing in two places. This is particularly effective for injection with a high vacuum degree.

Explain the effect.
The fourth embodiment has the following effects in addition to the effects (1) and (2).
(5) Since the seal between the non-cleaning mixer 2 and the mixer nozzle joining holder 3 is provided at two locations on the contact surface in the radial direction and the axial direction, it is possible to perform sealing with a higher degree of sealing, and vacuum injection with a higher degree of vacuum. It can be carried out.
Since other functions and effects are the same as those of the first embodiment, description thereof is omitted.

Here, the sealing method of the non-cleaning mixer in the vacuum injection method of the two-component mixed resin material described in Example 2 to Example 4 will be supplementarily described.
In the vacuum injection method of the two-component mixed resin material, in order to carry out this, it is important to ensure the sealing performance at each connecting portion. Especially for the mixer part (non-cleaning mixer), since the general fixed connection method such as screw fastening connection wrapped with a seal tape is structurally difficult, the sealing methods shown in Examples 2 to 4 are the same. Advantageous effects can be obtained.

When the seal is insufficient, problems such as inability to maintain the degree of vacuum in the vacuum chamber, suction of outside air from the seal portion, and bubbles in the material occur, and vacuum injection cannot be established.
The vacuum degree in the vacuum injection is set to the minimum necessary vacuum degree depending on the viscosity of the material and the conditions of the workpiece to be injected. Therefore, the sealing method may be properly used depending on the degree of vacuum.

  As mentioned above, although the vacuum injection method of the two-component mixed resin material of the present invention has been described based on Examples 1 to 4, the specific configuration is not limited to these Examples, Design changes and additions are permitted without departing from the spirit of the invention according to each claim of the scope.

It is a partial cross section explanatory drawing of the 2 liquid mixing injection apparatus which enforces the vacuum injection method of the 2 liquid mixing resin material of Example 1. FIG. It is explanatory drawing of a mixer nozzle joining holder part. It is sectional explanatory drawing of a mixer nozzle joining holder part. It is explanatory drawing of the conventional 2 liquid mixing injection apparatus. It is sectional explanatory drawing of the mixer nozzle joining holder part of Example 2. FIG. FIG. 6 is a cross-sectional explanatory view of a mixer nozzle joining holder portion of Example 3. It is a cross-sectional explanatory drawing of the mixer nozzle joining holder part of Example 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power mixer unit 2 Unwashed mixer 21 Mixer main body 22 Rotating shaft 23 Stirring blade 3 Mixer nozzle joining holder 31 Fastening part 32 Mixer attachment part 33 Nozzle attachment part 4 Seal packing 5 Mixer nozzle 6 Valve unit 7 Mixer guide 8 O ring 9 Vacuum Chamber 10 Workpiece 11 Seal rubber 12 Base 41 O-ring 42 O-ring 43 Seal packing 44 O-ring 50 Mixer 51 Liquid feed hose

Claims (2)

Two-component resin material is supplied to and mixed in a mixer that performs agitation and mixing by power transmission from the main body of the apparatus, and injected into a vacuumed container through a nozzle having an open / close valve. In the vacuum injection method of
The mixer was set in a disposable material shape, and the mixer was replaced without washing when the device was solvent-washed.
A vacuum injection method for a two-component mixed resin material. In the vacuum injection method of the two-component mixed resin material according to claim 1,
A first connecting member for connecting the mixer and the nozzle in a sealed state;
A second connecting member for connecting the nozzle and the container in a sealed state;
Provided,
When cleaning equipment with solvent, it was easy to perform solvent cleaning.
A vacuum injection method for a two-component mixed resin material.

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