JP2014226581A - Dry type cleaning device performance evaluation device and cleaning medium selection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dry type cleaning device performance evaluation device capable of qualitatively evaluating performance of a dry type cleaning device, and enabling an optimal cleaning medium to various cleaning objects to be easily selected.SOLUTION: The dry type cleaning device performance evaluation device 50 includes a dry type cleaning device 2, a tape-like film 52 as a substitution model of the cleaning object, a support base 54 and an air slider 56 as tension means. Cleaning operation by the dry type cleaning device 2 is performed while predetermined tension is imparted to the film 52. Time up to rupturing the film 52 from a start of the cleaning operation is set as an evaluation value. The cleaning medium suitable for the various cleaning objects can be easily selected by finding correlation between the evaluation value of each kind of cleaning medium and cleaning ability of the cleaning medium with respect to an actual cleaning object.

Description

  The present invention relates to a dry cleaning apparatus performance evaluation apparatus and a cleaning medium selection method for evaluating the performance of a dry cleaning apparatus.

In the production and recycling of products, a cleaning process is indispensable, and cleaning using a cleaning liquid such as a solvent or a surfactant is generally performed.
However, a large amount of solvent and cleaning liquid are consumed, and there are problems such as an adverse effect on the global environment due to the waste liquid and a heavy load on the worker due to the use of the chemical liquid.
In order to cope with such a problem, Patent Document 1 proposes a dry cleaning apparatus that performs cleaning by causing a lamellar cleaning medium to fly and collide with an object to be cleaned without using a cleaning liquid.

This dry cleaning apparatus has a configuration in which the inside of the housing is negatively pressured by a suction means to generate a swirling airflow, and the lamellar cleaning medium is circulated and flying by the swirling airflow.
The housing is provided with an opening and a vent, and when the opening contacts and closes an object to be cleaned, external air flows from the vent (inlet) at a high speed and turns. The cleaning medium flies with the airflow.
The cleaning medium circulating and flying repeatedly collides with the object to be cleaned at the opening, so that the dirt is removed and cleaning is possible.
Since the swirling airflow is generated by the negative pressure generated by the suction, even when the opening is separated from the object to be cleaned, the cleaning medium is held in the casing and is not scattered outside.

According to the dry cleaning device described in Patent Document 1, since a liquid such as a solvent or a cleaning liquid is not used, it is excellent in workability and environmental performance.
By the way, there are various types of objects to be cleaned by this type of dry cleaning device, such as those with dirt such as toner attached thereto, and those with flux accumulated and solidified.
Taking flux as an example, a jig for masking areas other than the area to be soldered is often used in a soldering process using a flow solder bath in printed circuit board manufacturing.
Such a mask jig (referred to as a dip pallet or carrier pallet) needs to be periodically cleaned in order to reduce the accuracy of the mask by depositing and fixing flux on the surface as it is used repeatedly.

In the dry cleaning apparatus, dirt is removed by using the collision energy of the cleaning medium against the object to be cleaned. However, depending on the type of the object to be cleaned, that is, the type of dirt, the cleaning medium for obtaining a good cleaning function is used. It is known that the types are different.
The type of cleaning medium is the shape, thickness, material, hardness, etc., but when deciding what type of cleaning medium is suitable for a certain dirt so far, actually change the type of cleaning medium. The only way to do this was to build up an empirical rule based on the results.
For this reason, wasted time due to trial and error was spent until the optimum cleaning medium was determined.

  If the performance of the dry cleaning device can be qualitatively evaluated, the optimum cleaning medium can be easily obtained by acquiring data with different types of cleaning media and correlating this data with the actual types of objects to be cleaned. Can be selected.

  The present invention was devised in view of such a current situation, and can provide a dry cleaning device that can qualitatively evaluate the performance of a dry cleaning device and can easily select an optimal cleaning medium for various cleaning objects. The main purpose is to provide an apparatus performance evaluation apparatus.

  In order to achieve the above object, the present invention creates a swirling airflow in the housing to fly the cleaning medium, and repeatedly applies the cleaning medium to the object to be cleaned at the opening blocked by the object to be cleaned. A dry cleaning apparatus performance evaluation apparatus for evaluating the performance of a dry cleaning apparatus for cleaning an object to be cleaned, and holding a tape-like film as an alternative model of the object to be cleaned and one end of the film A holding means for fixing, and a pulling means for holding the other end of the film and applying a predetermined tension to the film, and the dry-type film in a state where the film to which the tension is applied is covered with the opening. A cleaning operation is performed by a cleaning device, and a time from the start of the cleaning operation until the film breaks is used as an evaluation value.

  According to the present invention, the cleaning performance of the dry cleaning apparatus can be objectively grasped in advance, so that the optimal cleaning condition (cleaning medium) according to the type of the object to be cleaned can be selected, and unnecessary trial and error are repeated. Therefore, it is possible to remove the dirt without fail.

1 is a schematic side view of a dry cleaning device performance evaluation device according to an embodiment of the present invention, showing a state before a suction force of the dry cleaning device rises. FIG. It is a top view which shows the positional relationship of the opening part and film of a dry cleaning apparatus. It is a general | schematic side view of the dry-type cleaning apparatus performance evaluation apparatus during the washing | cleaning operation | movement of a dry-type cleaning apparatus. It is a general | schematic side view of a dry-type cleaning apparatus performance evaluation apparatus when a film fractures | ruptures. It is sectional drawing which shows the structure of a dry cleaning apparatus. It is a figure explaining the washing | cleaning operation | movement of a dry-type cleaning apparatus. 3 is a graph showing the film breaking time in Example 1. FIG. 1 is a photographic image diagram showing an overview of a fractured film in Example 1. FIG. It is a photograph image figure which shows the general appearance after washing | cleaning of the washing | cleaning target object in Example 1. FIG. 3 is a graph showing the breaking time of the film in Example 2. 6 is a photographic image view showing an overview of a fractured film in Example 2. FIG. It is a photograph image figure which shows the general appearance after washing | cleaning of the washing | cleaning target object in Example 2. FIG. 6 is a graph showing the break time of a film in Example 3. 6 is a photographic image view showing an overview of a fractured film in Example 3. FIG. FIG. 6 is a photographic image diagram illustrating an overview after cleaning of an object to be cleaned in Example 3. It is a photograph image figure which shows the general appearance after washing | cleaning of the washing | cleaning target object in the comparative example 1. It is a photograph image figure which shows the surface state of the film which was not fractured in Comparative Example 3. It is a photograph image figure which shows the surface state of the film which was not fractured in Comparative Example 4.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
First, the configuration and function of the dry cleaning apparatus according to this embodiment will be described.
5A and 5B are schematic views of the configuration of the handy type dry cleaning device 2, in which FIG. 5A is a transverse sectional view taken along the line AA, and FIG. 5B is a longitudinal sectional view taken along the line BB.
The dry cleaning device 2 includes a dry cleaning housing (hereinafter simply referred to as “housing”) 4 having a flying space for the cleaning medium 5 therein, and a suction means 6 for reducing the pressure inside the housing 4. .
The casing 4 is configured integrally with a cylindrical upper casing 4A as a casing main body and an inverted conical lower casing 4B. Here, the upper part and the lower part are convenient names on the drawing, and are not necessarily related to the upper and lower sides on the actual machine.

The lower housing 4B is integrally provided with an intake port 8 at the top of the cone, and functions as a suction duct.
The suction means 6 includes a flexible suction hose 10 having one end connected to the air inlet 8 and a suction device 12 connected to the other end of the suction hose 10.
As the suction device 12, a household vacuum cleaner, a vacuum motor, a vacuum pump, or a device that indirectly generates a low pressure or a negative pressure by pumping fluid can be used as appropriate. Note that the positional relationship between the upper and lower surfaces of the member is merely a reference on the drawing.

The bottom surface of the upper housing 4A is a fitting recess 4A-1 that joins the upper end of the lower housing 4B, and the upper housing 4A and the lower housing 4B are separable. The upper surface 4A-2 of the upper housing 4A is sealed.
A porous separation plate 14 is provided as a porous means at the boundary between the bottom surface of the upper housing 4A and the lower housing 4B.
The separation plate 14 is a plate-like member having holes such as punching metal. The separation plate 14 prevents the cleaning medium 5 from moving toward the lower housing 4B when sucked.
In FIG. 5A, the display of the separation plate 14 is partially omitted. The size of the cleaning medium 5 is exaggerated for easy understanding.

The porous means may be a porous shape having many pores having a size that allows air and dust (removed material removed from the object to be cleaned) to pass through without passing through the cleaning medium 5.
Therefore, a slit plate or a net may be used, and a resin or metal may be freely selected as long as the material has a smooth surface.
The porous means is arranged as a plane orthogonal to the central axis of the swirling airflow. By being orthogonal to the central axis of the swirling airflow, the airflow flows in a direction along the porous means, thereby preventing the cleaning medium 5 from staying.
In order to suppress the attenuation of the swirling airflow, it is desirable that the inner surface of the housing is smooth without steps and irregularities.

The porous means is arranged on the surface along the swirling airflow, so that the cleaning medium adsorbed on the surface can be re-flighted.
The material of the housing 4 is not particularly limited, but is preferably made of metal such as aluminum or stainless steel in order to prevent wear due to adhesion of foreign matter or friction with the cleaning medium, but a resinous material may be used. it can.

A cylindrical channel restricting member 16 is provided as a part of the casing at the center of the upper casing 4A so that the cylindrical axis of the upper casing 4A is a common axis. The lower end is fixed to the separation plate 14.
The channel restricting member 16 is provided for the purpose of improving the flow velocity by reducing the channel cross-sectional area of the swirling airflow. A ring-shaped swirling airflow movement space (cleaning medium flying space) having a smooth wall surface is formed in the upper housing 4A by the flow path restriction member 16.
Depending on the shape of the upper casing 4A, the central axis of the flow path restricting member 16 and the central axis of the upper casing 4A do not necessarily have to be common, and may be eccentric if a ring-shaped space can be secured. good.

An opening 18 is formed in a part of the side surface of the upper housing 4A to allow the cleaning medium 5 flying with a swirling airflow to contact or collide with an object to be cleaned.
The upper housing 4A has a cylindrical shape whose height is extremely small with respect to the diameter, and an opening 18 is provided in a part of a side surface forming the height.
Thereby, as shown in FIG. 5B, the entire casing 4 has a layout in which the outer peripheral portion other than the opening 18 largely escapes (separates) from the cleaning target 20.
For this reason, the local contact | abutting with respect to the washing | cleaning target 20, ie, the freedom degree of pinpoint cleaning, is raised.
The opening 18 has a shape obtained by cutting the side surface of the upper housing 4A by a flat cross section parallel to the cylindrical axis, and has a rectangular shape when viewed from a direction orthogonal to the cylindrical axis.

An air inflow port 22 is formed on the side surface of the upper housing 4A. An inlet 24 serving as a swirling air flow generating means and a ventilation path is connected to the air inflow port 22 from the outside of the upper housing 4A. It is integrally fixed to the housing 4A.
The inlet 24 is set substantially parallel to the separation plate 14, and the ventilation direction thereof is inclined with respect to the radial direction of the upper housing 4 </ b> A, and the extension line at the center of the ventilation path is positioned so as to reach the opening 18. Yes.
The inlet 24 has a width extending in the height direction of the upper housing 4A. One inlet 24 having a diameter or width smaller than the height of the upper housing 4A may be arranged, or a plurality of single inlets may be arranged in the height direction.

As shown in FIG. 5, when the opening 18 is in contact with the object 20 to be closed, the inside of the housing 4 becomes a closed space, and outside air flows from the inlet 24 at high speed.
The high-speed air flow accelerates the cleaning medium 5 toward the opening 18 and generates a swirl air flow 30 as a swirl air flow.
The swirling airflow generated when the closed space is formed has the effect of blowing away the cleaning medium adsorbed on the separation plate 14 and re-flighting.

When the opening 18 is opened, the opening 18 has an area large enough to set the internal pressure at the air inlet 22 to atmospheric pressure or the vicinity thereof. Further, the air inlet 22 is also arranged at a position where the atmospheric pressure or the vicinity thereof tends to be reached when the opening 18 is opened.
By providing such a configuration, while the dry cleaning device 2 is not applied to the object to be cleaned, the air inlet 22 approaches the atmospheric pressure, so that the differential pressure with the outside decreases, and the airflow that flows in as a result. Is dramatically reduced.
On the other hand, since the airflow flowing in from the opening 18 increases, the cleaning medium 5 can be prevented from leaking out of the housing 4.
In addition, when the opening 18 is opened, the total amount of airflow flowing in is 2 to 3 times as compared with when the opening 18 is closed, so that the lamellar cleaning medium is adsorbed on the porous means. , Do not leak out of the case without flying again.
This is called a cleaning medium adsorption effect when the opening is opened.

Although the cleaning medium 5 is a collection of flaky cleaning pieces, it is also used herein as a single flaky cleaning piece.
The flaky cleaning medium is a thin piece having an area of 1 mm ² or more and 200 mm ² or less. The material of the cleaning medium is a film made of a durable material such as polycarbonate, polyethylene terephthalate, acrylic, or cellulose resin, and the thickness is 0.02 mm or more and less than 0.1 mm.
However, depending on the object to be cleaned, it may be effective to change the thickness, size, and material of the cleaning medium, and the conditions are not limited to the above-described cleaning medium conditions.
The cleaning media is not limited to resin, but it is thin, lightweight, and easy to fly even with thin pieces such as paper and cloth, or with minerals such as mica, ceramics, glass, and metal foil. Can be used.

The ring-shaped internal space 26 of the upper housing 4 </ b> A is a space that has a function of causing the cleaning medium 5 to fly by the swirling airflow and contacting the cleaning target object 20 facing the opening 18.
The internal space 34 of the flow path restriction member 16 is a space where the swirling air current does not act.

A cleaning operation (hereinafter referred to as a cleaning operation) by the dry cleaning apparatus 2 configured as described above will be described with reference to FIG.
In FIG. 6, the thickness of the member is omitted, and the internal space 34 as a static space is hatched for easy understanding.
FIG. 6B shows a state where the opening 18 is separated from the object 20 to be cleaned and the opening 18 is opened to perform intake, and FIG. 6A shows the state where the opening 18 is applied to the object 20 to be cleaned. Indicates a blocked state.
Prior to the cleaning operation, the cleaning medium 5 is supplied into the housing 4. The cleaning medium 5 supplied into the housing 4 is sucked by the separation plate 14 and held in the housing 4 as shown in the lower diagram of FIG.
Since the inside of the housing 4 is in a negative pressure state due to intake air, air outside the housing flows into the housing 4 through the inlet 24.
Since the flow in the inlet 24 at this time is small in both the flow velocity and the flow rate, the swirling airflow 30 generated in the housing 4 does not reach the strength for causing the cleaning medium 5 to fly.

When the cleaning medium 5 is supplied and held in the housing 4, as shown in FIG. 6A, the opening 18 is put in a closed state by hitting the surface of the cleaning object 20 to be cleaned.
When the opening 18 is closed, intake from the opening 18 stops, so the negative pressure in the housing 4 increases at a stretch, and the amount of air sucked through the inlet 24 and the flow velocity increase and are rectified in the inlet 24. The
Thereafter, a high-speed air flow is blown out from the inlet outlet (air inlet 22) into the housing 4.
The blown air flow causes the cleaning medium 5 held on the separation plate 14 to fly toward the surface of the cleaning object 20 facing the opening 18.

The air flow becomes a swirling air flow 30 and flows in an annular shape along the inner wall of the housing 4, and a part of the air flow is sucked by the suction means 6 through the hole of the separation plate 14.
When the swirling airflow 30 that has flowed annularly in the housing 4 in this way returns to the outlet portion of the inlet 24, the airflow entering from the inlet 24 is accelerated while joining the swirling airflow 30. In this way, a stable swirling airflow 30 is formed in the housing 4.

The cleaning medium 5 swirls within the housing 4 by the swirling airflow and repeatedly collides with the surface of the cleaning target 20. Due to the impact caused by the collision, the dirt is separated from the surface of the cleaning object 20 in the form of fine particles or powder.
The separated dirt is discharged to the outside of the housing 4 by the suction means 6 through the hole of the separation plate 14.
The swirling airflow 30 formed in the housing 4 has its swirling axis orthogonal to the surface of the separation plate 14, and the swirling airflow 30 becomes an airflow parallel to the surface of the separation plate 14.
For this reason, the swirling air flow 30 is sprayed from the lateral direction onto the cleaning medium 5 sucked on the surface of the separation plate and enters between the cleaning medium 5 and the separation plate 14, and the cleaning medium 5 sucked on the separation plate 14 is absorbed. An effect of peeling off from the separation plate 14 and flying again occurs.

Further, since the opening 18 is blocked and the negative pressure in the upper housing 4A increases and becomes close to the negative pressure in the lower housing 4B, the force for sucking the cleaning medium 5 against the surface of the separation plate 14 is also reduced. As a result, the cleaning medium 5 can fly more easily.
Since the swirling airflow 30 is accelerated in a certain direction, a high-speed airflow is easily generated, and a high-speed flying motion of the cleaning medium 5 is also facilitated.
The cleaning medium 5 that swivels at high speed is difficult to be sucked by the separation plate 14, and the dirt attached to the cleaning medium 5 is easily separated from the cleaning medium 5 by centrifugal force.
When the inside of the housing is sucked from the air inlet of the housing, that is, when the opening of the housing is directed to the object to be cleaned, negative pressure is generated inside the housing, and external air is sucked into the housing through the air passage. .

A dry cleaning device performance evaluation apparatus according to this embodiment will be described with reference to FIGS. 1 to 4.
As shown in FIG. 1, the dry cleaning apparatus performance evaluation apparatus 50 includes a dry cleaning apparatus 2, a tape-like film 52 as an alternative model of the object to be cleaned, a support base 54, an air slider 56 as a pulling means, and the like. have.
Most of the film 52 is placed on the support base 54 and one end thereof is fixed on the support base 54 by the holding means 58.
The other end of the film 52 is held by a holding member 60, and a hook 56 a of an air slider 56 is hooked on the holding member 60.
A three-way valve 62 is provided between the suction hose 10 </ b> A on the housing 4 side of the dry cleaning device 2 and the suction hose 10 </ b> B on the suction device 12 side.

The housing 4 of the dry cleaning device 2 is installed so that a part of the film 52 in the length direction on the support base 54 is covered with the opening 18.
As shown in FIG. 2, the width w of the film 52 is set to a size that can be covered by the opening 18.
In a state where a predetermined tension is applied to the film 52 by the air slider 56, the cleaning operation by the dry cleaning device 2 is performed.
In other words, this cleaning operation is a damage imparting operation on the film 52.
As shown in FIG. 1, the three-way valve 62 is initially communicated with the atmosphere side and the suction side, and the opening 18 of the housing 4 is pressed against the film 52.

After the suction force of the suction device 12 is stabilized and reaches a steady state, the three-way valve 62 is switched so that the housing side and the suction side communicate with each other as shown in FIG.
This switching time is the start time of the cleaning operation of the dry cleaning device 2.
As time passes, the surface of the film 52 is scraped by the collision of the cleaning medium 5, and eventually breaks as shown in FIG.
By manually or automatically measuring the time from the start of the cleaning operation until the film 52 breaks and using this as an evaluation value, the cleaning performance of the dry cleaning device 2 can be objectively grasped.
This evaluation value varies depending on the cleaning medium used. Therefore, by obtaining the evaluation value by changing the type of the cleaning medium, the cleaning performance for each type of the cleaning medium can be grasped as a numerical value.

For thick and hard dirt such as flux and fixed toner, a film having close to the physical properties of the dirt is prepared, and the time until the film breaks is measured, and this is a prior evaluation for dirt removal.
This makes it possible to know in advance which cleaning medium is suitable for what kind of dirt.

[Example 1]
A polyimide (PI; pencil hardness F) film having a thickness of 50 μm and a width of 6 mm was set, and a tension of 20 N was applied by an air slider.
As the cleaning medium, a predetermined amount of triacetyl cellulose (TAC; pencil hardness 2H) having a thickness of 250 μm and a size of 6 × 3 mm was used.
Therefore, the hardness of the film is smaller than that of the cleaning medium.
When the cleaning operation is started, the cleaning medium (TAC) is introduced into the internal space and flies. The PI film is worn by repeated collision of the TAC cleaning medium with the PI film at the opening.
The time until the PI film breaks is measured. FIG. 7 shows the result of the experiment repeated seven times, and FIG. 8 shows the appearance of the broken film.

As is clear from FIG. 7, the variation in the cleaning performance is small, and a stable cleaning function can be obtained with a cleaning object in which this cleaning medium is effective.
FIG. 9 shows the result of performing the cleaning operation on the object to be cleaned as a metal mask to which a flux residue is attached, which is known in advance that the cleaning medium under the above conditions is effective.
The central part is intentionally an unwashed part in order to show the adhesion state of the flux residue. It can be confirmed that the cleaned part is well cleaned.
Conventionally, it took a long time to select an appropriate cleaning medium by trial and error, but by using a performance evaluation device that has been evaluated in advance, it is possible to remove dirt on the surface to be cleaned in a short time. (Same in other examples below).

The dry cleaning apparatus performance evaluation apparatus 50 obtains an evaluation value (time until breakage) for each type of cleaning medium, and creates a correlation table that can perform good cleaning with the actual type of cleaning object.
That is, a correlation table is created by associating the obtained evaluation value for each type of cleaning medium with the actual type of cleaning object.
After creating the correlation table, it becomes clear at a glance which type of cleaning medium is optimal for the type of dirt on the object to be cleaned.
Even when a new cleaning medium not included in the correlation table is used, if the performance is evaluated in advance by the dry cleaning apparatus performance evaluation apparatus 50, it is possible to know what kind of dirt can be handled and avoid wasted time. can do.
Here, the type of cleaning medium (shape, thickness, material, area, etc.) is correlated with the film, but data such as the flow velocity of the swirling airflow may also be considered.

[Example 2]
In the same manner as in Example 1, the cleaning conditions are selected by the dry cleaning apparatus performance evaluation apparatus.
The film set in the apparatus is polyimide black (PIB; pencil hardness B) having a thickness of 50 μm and a width of 12 mm, and a tension of 30 N is applied by an air slider.
A melamine shot material (pencil hardness 6H) having a particle size of 2 mm was weighed and used as a cleaning medium.
The time until the PIB film breaks is measured. FIG. 10 shows the result of the experiment repeated seven times, and FIG. 11 shows the appearance of the broken film.
As is clear from FIG. 10, the variation in the cleaning performance is small, and a stable cleaning function can be obtained with an object to be cleaned in which this cleaning medium is effective.
The object to be cleaned is a baked paint plate (Misumi; surface melamine paint, groundwork; cationic resin electrodeposition coating; total coating thickness of about 40 μm), which is known in advance to be effective for the above-mentioned cleaning media. Peeling was performed.
The result of the cleaning operation is shown in FIG.

[Example 3]
In the same manner as in Example 1, the cleaning conditions are selected by the dry cleaning apparatus performance evaluation apparatus.
The film set in the apparatus is polyimide black (PIB) having a thickness of 75 μm and a width of 12 mm, and a tension of 20 N is applied by an air slider.
A predetermined amount of acrylic (pencil hardness 2H) having a thickness of 250 μm and a size of 12 × 12 mm was used as a cleaning medium.
The time until the PIB film breaks is measured. FIG. 13 shows the result of the experiment repeated seven times, and FIG. 14 shows the appearance of the broken film.
As is clear from FIG. 13, the variation in the cleaning performance is small, and a stable cleaning function can be obtained with an object to be cleaned in which this cleaning medium is effective.
The object to be cleaned was a polyimide residue on a mold of a polyimide belt transferred and formed from a mold, which has been known in advance that the cleaning medium under the above conditions is effective.
The result of the cleaning operation is shown in FIG.

[Comparative Example 1]
A baked coated plate as a cleaning object was weighed by a predetermined amount of a TAC cleaning medium having a size of 6 × 3 mm, and the coating was removed.
That is, the cleaning object is determined and cleaned without knowing the performance of the cleaning medium under the above conditions.
Since the performance evaluation of the dry cleaning device has not been carried out, it is impossible to predict in advance the peeling performance with the TAC cleaning medium for removing the coating film. As a result, as shown in FIG. I couldn't.

[Comparative Example 2]
A flux residue on a metal mask as a cleaning object was weighed in a predetermined amount of a melamine shot material having a particle diameter of 2 mm, and the flux residue was removed.
Since the performance evaluation of the dry cleaning apparatus was not performed, the peeling performance by the melamine cleaning medium for removing the coating film could not be predicted in advance, and as a result, the flux residue could not be completely removed.
Not only this, but dents were formed on the surface of the metal mask, making it difficult to use as a metal mask.

[Comparative Example 3]
In the same manner as in Example 1, the cleaning conditions are selected by the dry cleaning apparatus performance evaluation apparatus.
The film to be set in the apparatus is polyimide (PI; pencil hardness F) having a thickness of 100 μm and a width of 12 mm, and a tension of 20 N is applied by an air slider.
A predetermined amount of polyimide black (PIB; pencil hardness B) having a thickness of 50 μm and a size of 6 × 3 mm was used as a cleaning medium.
As shown in FIG. 17, the PI film was not broken. Therefore, the evaluation value was not obtained.
This result means that since the hardness of the film is high, data for creating a correlation table cannot be obtained unless a cleaning medium corresponding to the film is used.
Moreover, it means that dirt cannot be removed even if a cleaning medium having the above conditions is used for the object to be cleaned corresponding to this film.

[Comparative Example 4]
In the same manner as in Example 1, the cleaning conditions are selected by the dry cleaning apparatus performance evaluation apparatus.
The film set in the apparatus is polyimide black (PIB) having a thickness of 100 μm and a width of 12 mm.
At this time, no tension was applied to the film.
A predetermined amount of PMMA (acrylic resin) having a thickness of 250 μm and a size of 12 × 12 mm was used as a cleaning medium.
As shown in FIG. 18, the PIB film did not break. Therefore, the evaluation value was not obtained.
This result means that since the hardness of the film is high, data for creating a correlation table cannot be obtained unless a cleaning medium corresponding to the film is used.
Moreover, it means that dirt cannot be removed even if a cleaning medium having the above conditions is used for the object to be cleaned corresponding to this film.

  In the above-described embodiment, the width of the film 52 is set to a size that can be covered with the opening 18. However, the film 52 may be covered and cleaned to be broken.

DESCRIPTION OF SYMBOLS 2 Dry cleaning apparatus 4 Case 5 Cleaning medium 6 Suction means 18 Opening part 30 Swirling airflow 52 Film 56 Air slider as a tension means 58 Holding means 62 Three-way valve

JP 2012-050973 A

Claims (5)

The performance of a dry cleaning device that cleans an object to be cleaned by causing a swirling airflow in the housing to fly the cleaning medium and repeatedly applying the cleaning medium to the object to be cleaned at the opening blocked by the object to be cleaned A dry cleaning device performance evaluation device for evaluating
Tape-like film as an alternative model of the object to be cleaned,
Holding means for holding and fixing one end of the film;
A pulling means for gripping the other end of the film and applying a predetermined tension to the film;
A cleaning operation is performed by the dry cleaning device in a state in which the film to which the tension is applied is covered with the opening, and the time from the start of the cleaning operation to the breaking of the film is used as an evaluation value. Dry cleaning device performance evaluation device. In the dry cleaning apparatus performance evaluation apparatus according to claim 1,
The dry cleaning apparatus performance evaluation apparatus, wherein the dry cleaning apparatus has a configuration in which a swirling airflow is generated by generating a negative pressure in the housing by suction by a suction unit. In the dry cleaning apparatus performance evaluation apparatus according to claim 2,
A three-way valve is provided between the suction means and the housing;
The dry cleaning apparatus performance evaluation apparatus, wherein after the suction force by the suction means reaches a steady state, the negative pressure in the housing is started to perform a cleaning operation. In the dry cleaning apparatus performance evaluation apparatus according to any one of claims 1 to 3,
A dry cleaning apparatus performance evaluation apparatus, wherein the pulling means is an air slider. Uses a dry cleaning device that creates a swirling airflow in the housing, causes the cleaning medium to fly, and repeatedly cleans the cleaning object by repeatedly applying the cleaning medium to the object to be cleaned at the opening blocked by the object to be cleaned. A method of selecting a cleaning medium in dry cleaning,
An evaluation value for each type of cleaning medium obtained by the dry cleaning apparatus performance evaluation apparatus according to any one of claims 1 to 4, and a correlation table is created in association with the actual type of cleaning object, A method of selecting a cleaning medium, wherein the type of cleaning medium for the object to be cleaned is determined based on the correlation table.

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