JP2007132550A - Vacuum drying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To dry a object to be dried in a short period of time with a simple constitution. <P>SOLUTION: This vacuum dryer for drying an object to be dried received in a basket 31, comprises: a sealable container (vacuum chamber 10); an exhaust system 12 for applying a vacuum to the container; a vertical rotating shaft 13 for spin inserted into the container in the vertical direction; a mechanical chuck 21 gripping the basket 31 and fixing the same to the vertical rotating shaft 13 for spin; a driving mechanism 14 for spin, rotating and driving the basket 31 gripped by the chuck 21 on a vertical axis by rotating the vertical rotating shaft 13 for spin, an optically-transparent window 41 formed on a wall of the container, and a heating lamp 42 mounted outside of the container for radiation heating the object to be dried received in the basket 31 through the optically-transparent window 41. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vacuum drying apparatus, and more particularly to a vacuum drying apparatus that uses both spin drying and radiation heating drying in vacuum.

Conventionally, a heated inert gas is introduced into a vacuum drying chamber to contribute to drying, and then the inert gas is cooled to separate the liquid, and the inert gas is heated again and introduced into the vacuum drying chamber. There has been proposed a method of drying a work (an object to be dried) using a technique (see, for example, Patent Document 1).
JP-A-6-213562

However, in the conventional method, since the apparatus is complicated and it takes time to dry, there is room for improvement.
An object of the present invention is to provide a vacuum dryer capable of solving the above-described problems of the prior art and drying an object to be dried in a short time with a simple configuration.

1st invention is a vacuum dryer which dries to-be-dried material accommodated in the basket, Comprising: The container which can be sealed, the exhaust system which evacuates the said container, and a vertical direction is inserted in the said container A vertical rotation shaft for spin, a guide provided on the vertical rotation shaft for spin and positioning the basket at a predetermined position in the container, and the vertical rotation shaft for spin by gripping the basket positioned by the guide A mechanical chuck that is fixed to the spinner, a spin drive mechanism that rotates the vertical rotation shaft for spin to rotate the basket held by the chuck around the vertical axis, and a light transmission window provided on the wall of the container And a heating lamp that is provided outside the container and radiantly heats an object to be dried accommodated in the basket through the light transmission window. That.
According to the present invention, since vacuum, spin, and heating are simultaneously performed, an object to be dried in the basket can be dried in a short time. According to the present invention, since the basket is fixed by the mechanical chuck, unlike a vacuum chuck, it can be used even in a vacuum and can handle heavy objects.

According to a second aspect, in the first aspect, the chuck includes a gripping portion including a pair of arms for fixing the basket, and an elastic member that biases the gripping portion in a direction of gripping the basket. A vacuum dryer comprising: a cylinder that urges the grip portion in a direction to release the grip of the basket against the urging force of the elastic member.
Since the basket is held by the elastic member, the basket can be stably fixed against spin, and a heavy object to be dried can be dried in a short time.

3rd invention is a vacuum dryer which dries to-be-dried material accommodated in the basket, Comprising: The container which can be sealed, the exhaust system which evacuates the said container, and a vertical direction is inserted in the said container A spin vertical rotation shaft, a spin drive mechanism for rotating the spin vertical rotation shaft to rotate the rotating basket around the vertical axis, and a rolling vertical rotation shaft penetrating through the spin vertical rotation shaft; A pair of rollers disposed in the horizontal direction on the upper part of the vertical rotating shaft for rolling, a transmission means for transmitting rotational motion between the vertical rotating shaft for rolling and the pair of rollers, and the vertical for rolling A rolling drive mechanism that rotates a rotating shaft and rolls a basket placed on the pair of rollers via the transmission means about a horizontal axis, a light transmission window provided on the wall of the container, and an outer side of the container Provided in the light A vacuum dryer and a heating lamp for radiating heat of the material to be dried to be received within the basket through over the window. Here, spin means a motion that rotates about the vertical axis, and rolling means a motion that rotates about the horizontal axis.
Spinning and rolling are applied to the basket by two-axis rotation that uses both the vertical rotation axis for spinning and the vertical rotation axis for rolling. Can be dried.

A fourth aspect of the present invention is the vacuum dryer according to the first or second aspect, wherein a bearing having a rotation seal is used in the insertion portion of the container wall into which the spin vertical rotation shaft is inserted. It is.
In the normal sealing means using a normal O-ring and vacuum grease for the shaft seal of the insertion portion, there is a problem that resistance increases with rotation and overload tends to occur. However, according to the present invention, the rotation seal Can be used to solve such problems.

A fourth invention is the vacuum dryer according to any one of the first to third inventions, wherein the light transmission window is tempered glass.
When tempered glass is used, heat resistance, pressure resistance, and high transmittance can be obtained, and an object to be dried can be dried in a shorter time.

According to a fifth invention, in the first to fourth inventions, the chuck includes a gripping portion including a pair of arms for fixing the basket, and an elastic force for biasing the gripping portion in a direction for fixing the basket. A vacuum dryer comprising: a member; and a cylinder that urges the grip portion in a direction to release the basket against the urging force of the elastic member.
Since the basket is held by the elastic member, the basket can be stably fixed against spin, and a heavy object to be dried can be dried in a short time.

  According to the present invention, an object to be dried can be dried in a short time with a simple configuration.

Embodiments of the present invention will be described below.
FIG. 1 is a schematic longitudinal sectional view of a vacuum dryer according to an embodiment. This vacuum dryer can select either a spin mode or a combination mode of spin and rolling. In the drawing, the rotation indicated by the arrow A means spin, and the rotation indicated by the arrow B means rolling.

The vacuum dryer includes a vacuum chamber 10 as a sealable container, an air supply system 11 for introducing gas into the vacuum chamber 10, an exhaust system 12 for evacuating the vacuum chamber 10, and a vertical direction inside the vacuum chamber 10. The spin vertical rotation shaft 13 inserted in the machine, the mechanical chuck 21 for fixing the basket 31 for storing the object to be dried to the spin vertical rotation shaft 13, and the spin vertical rotation shaft 13 are rotated to rotate the spin vertically. A spin drive mechanism 14 that rotationally drives the basket 31 around the shaft 13, a light transmission window 41 provided on the wall of the vacuum chamber 10, and a light transmission window 41 provided outside the vacuum chamber 10 and accommodated in the basket 31. And a heating lamp 42 that radiates and heats an object to be dried.
The basket 31 is positioned at a predetermined position by a guide (not shown), and then fixed by the chuck 21. The basket 31 is fixed by the chuck 21 only in the spin mode. In the combined mode, the basket 32 (indicated by a two-dot chain line) is not fixed by the chuck 21.

  The basket is composed of a net-like basket that accommodates an object to be dried, and has various shapes. Different types of baskets are used in the spin mode and the combined mode. Examples of the basket 31 used in the spin mode include a square basket 31 with a handle called a square basket as shown in FIG. 2A and a round with a handle 31a called a round basket in FIG. 2B. There is a mold basket 31 '. The basket 32 used in the combined mode includes, for example, a rotation-only round basket called a rotary basket as shown in FIG. This rotation-only round basket has circular ridges at both ends, and has a net-like hexagonal cylinder at the center between the ridges. In FIG. 1, the description of the handle 31a of the basket 31 is omitted.

  The vacuum chamber 10 is formed of a cylindrical body whose bottom is closed and whose top is open. A flange is formed in the upper opening, and a lid 8 that covers the upper opening is attached to the flange via an O-ring 9 so as to be opened and closed.

  The air supply system 11 introduces a gas for returning to the atmosphere, such as air or an inert gas, into the vacuum chamber 10. The air supply system 11 includes an introduction pipe 11a connected to the vacuum chamber 10, an open / close valve 11b provided in the introduction pipe 11a, and a high-performance filter 11c that filters gas flowing through the introduction pipe 11a.

  The exhaust system 12 evacuates the vacuum chamber 10. The exhaust system 12 includes an exhaust pipe 12a connected to the vacuum chamber 10, an open / close valve 12b provided in the exhaust pipe 12a, and a vacuum exhaust unit 12c including a vacuum pump and the like.

  The spin vertical rotating shaft 13 is inserted into the vacuum chamber 10 via the bearing 50 and is centered on a vertical axis (vertical axis) passing through the center of gravity of the basket 31 (32) on the extension line of the spin vertical rotating shaft 13. The basket 31 (32) is rotated.

  The chuck 21 fixes the basket 31 to the spin vertical rotation shaft 13. As described above, the chuck 21 is used only in the spin mode and is not used in the combination mode.

  The spin drive mechanism 14 includes a spin motor 14 a and rotates the spin vertical rotation shaft 13 to spin the basket 31 (32) in the vacuum chamber 10 around the vertical axis.

  The rolling vertical rotation shaft 15 applies a rotational force that causes the basket 32 indicated by a dotted line to roll about a horizontal axis passing through its center of gravity. The rolling vertical rotating shaft 15 is inserted into the vacuum chamber 10 by passing the rolling vertical rotating shaft 15 through the spin vertical rotating shaft 13. The spin vertical rotation shaft 13 and the rolling vertical rotation shaft 15 constitute a concentric biaxial rotation shaft.

  A pair of rollers 17 is disposed on the upper part of the rolling vertical rotation shaft 15 so as to face the horizontal direction. The basket 32 indicated by a dotted line is provided so as to roll by being supported across the pair of rollers 17.

  A gear mechanism 60 is provided between the rolling vertical rotating shaft 15 and the pair of rollers 17 as a transmission means for transmitting the rotation of the rolling vertical rotating shaft 15 to the rotation of the pair of rollers 17. 15 rotations are transmitted to the pair of rollers 17 via the gear mechanism 60.

  In the gear mechanism 60, a plurality of pairs of bevel teeth are used to transmit rotational motion between the rolling vertical rotating shaft 15 and the rolling horizontal rotating shaft 19 that intersect at a right angle, and the rolling horizontal rotating shaft 19 that intersects at a right angle Rotational motion is transmitted between the roller shaft 18 and the roller shaft 18.

  The rolling drive mechanism 16 vertically rotates the rolling vertical rotation shaft 15 by the rolling motor 16a, converts the vertical shaft rotation to horizontal axis rotation by the gear mechanism 60, and rolls the basket 32 indicated by the dotted line in the vacuum chamber 10. Move.

  The light transmission window 41 transmits light emitted from the outside of the vacuum chamber 10 and takes it into the vacuum chamber 10. The light transmission window 41 is provided in an opening provided in a side wall portion facing the basket 31 (32) of the vacuum chamber 10 and hermetically closes the opening through an O-ring 7. In the embodiment, the light transmission window 41 is tempered glass. This is because when tempered glass is used, infrared transmittance is high and inexpensive while having heat resistance and pressure resistance. The tempered glass has heat resistance of about 150 ° C. in vacuum.

  The heating lamp 42 is provided outside the vacuum chamber 10 and radiates and heats an object to be dried accommodated in the basket 31 (32) through the light transmission window 41. For the heating lamp 42, for example, a near infrared light bulb such as a halogen lamp is used. The heating lamp 42 is covered and protected by a lamp box 43.

Next, a mechanism for attaching and detaching the basket 31 (32) to the vacuum chamber 10 will be described. 3 and 4 show an attaching / detaching mechanism applied to the square basket 31, FIG. 3 shows when the basket is mounted, and FIG. 4 shows after the basket is detached. The basket 31 has a handle 31a.
A basket support guide 30 is provided on the upper part of the spin vertical rotation shaft 13 in accordance with the basket shape via a member (not shown). Here, the guide 30 is configured by a frame having a rectangular parallelepiped shape in accordance with the shape of the square basket 31. Each of the lower parts of the four vertical members 30a out of the twelve frame members is provided with a locking portion 30b in which the four corners of the rectangular bottom surface of the basket 31 are locked. The basket 31 is inserted into the guide 30 from above the guide 30, guided to the guide 30 and locked by the locking portion 30 b, and positioned (attached) at a predetermined position in the vacuum chamber 10.
The guide for the round basket 31 ′ is preferably provided in the guide 30 so as to be detachable.

  When the spin mode is selected, when the basket 31 positioned in the guide 30 closes the mechanical chuck 21, the pair of gripping portions 21a advance in the direction of the arrow to grip both sides of the basket 31, so that the vertical rotation for spin It is fixed to the shaft 13 (FIG. 3). When the chuck 21 is opened and the pair of gripping portions 21a are retracted in the direction of the arrow, the basket 31 is released from the chuck 21, can be detached, and is removed from the guide 30 (FIG. 4).

  When the combination mode is selected, the chuck 21 is not used to allow the basket 32 to roll. Further, the guide 30 is not particularly required. This is because the basket 32 is positioned on a pair of rollers provided with stoppers (not shown) for preventing dropping at both ends.

  The above is the schematic configuration of the vacuum dryer according to the embodiment. Next, detailed configurations of the vacuum exhaust unit, the rotation mechanism unit, and the roller / chuck unit will be described.

(1) Vacuum exhaust unit FIG. 5 shows an embodiment of the vacuum exhaust unit.
The vacuum exhaust unit is configured so that two types of exhaust methods, a vacuum pump type and an ejector type, can be selected. This is because it can be used properly depending on the type of cleaning liquid adhering to the object to be dried and the demand of the client.

  FIG. 5A shows a vacuum pump type, and the vacuum pump 121 used for this may be a rotary pump or a dry pump. The advantage of exhausting by the vacuum pump 121 is that it can be evacuated to a lower pressure than the ejector type. The disadvantage is that the liquid contained in the exhaust gas is discharged out of the vacuum chamber as it is.

  FIG. 5B shows an ejector type, which is a liquid pump 124, an ejector 122 that sucks exhaust gas discharged from the vacuum chamber by the liquid pump 124, and an exhaust gas sucked by the ejector 122. The condenser 123 is used to cool the refrigerant, and cooling water or refrigerant is allowed to flow through the condenser 123 to cool the exhaust gas sucked by the ejector 122, and the liquid contained in the exhaust gas is condensed and discharged to the solution reservoir 125. The merit of exhaust by this method is that the liquid contained in the exhaust gas can be condensed and discharged. The disadvantage is that it requires a higher pressure than the vacuum pump type.

(2) Rotation Mechanism Unit As shown in FIG. 6, the spin vertical rotation shaft 13 is inserted into the vacuum chamber 10 in the vertical direction from an insertion hole 10b as an insertion portion provided at the center of the bottom wall 10a of the vacuum chamber 10. Is done. A bearing 50 having a rotation seal 51 is used in the insertion hole 10b in the center of the bottom wall 10a into which the spin vertical rotation shaft 13 is inserted.

  The reason why the rotation seal 51 is used for the bearing 50 that supports the spin vertical rotation shaft 13 is as follows. If the bearing is a combination of a normal O-ring and vacuum grease, the resistance of the shaft seal portion is large, and if the vertical rotation shaft for spinning 13 is spun at a high speed, the O-ring has heat and the resistance increases to increase the bearing. Overload. The crushing allowance was adjusted many times, but it took time to balance the vacuum seal and spin rotation. It is also possible to use a magnetic seal or a fluid bearing. In the present embodiment, a normal O-ring 52 is used in part, but a rotation seal 51 is mainly used.

  The spin drive mechanism 14 includes a spin motor 14a, a pulley 14b provided on the motor shaft, a pulley 14c provided below the spin vertical rotation shaft 13, and a belt 14d connecting the pulleys 14b and 14c. Thus, the rotation of the spin motor 14a is transmitted to the spin vertical rotation shaft 13.

  The rolling vertical rotation shaft 15 penetrates the spin vertical rotation shaft 13 formed in a hollow shape, thereby forming a biaxial rotation shaft with the spin vertical rotation shaft 13. An upper portion and a lower portion of the rolling vertical rotation shaft 15 are drawn out from the spin vertical rotation shaft 13, and a bevel gear 61 constituting a part of the gear mechanism 60 is a bevel gear above the rolling vertical rotation shaft 15. It is provided with the tooth surface facing up.

  The rolling drive mechanism 16 includes a rolling motor 16a, a pulley 16b provided on the motor shaft, a pulley 16c provided below the rolling vertical rotary shaft 15 drawn out from the spin vertical rotary shaft 13, and A belt 16d connecting both pulleys 16b and 16c is provided to transmit the rotation of the rolling motor 16a to the rolling vertical rotating shaft 15, and the bevel gear 61 is rotated around the rolling vertical rotating shaft 15. ing.

  Air is supplied to the cylinder 22 that drives the chuck 21 via the rolling vertical rotation shaft 15. A high-speed rotation air introduction joint 55 is provided at the lower end of the rolling vertical rotation shaft 15, and cylinder drive air (indicated by an arrow) is introduced therefrom (FIG. 7B). The air introduced into the rolling vertical rotating shaft 15 from the high-speed rotating air introducing joint 55 passes through the air passage 56 provided in the rolling vertical rotating shaft 15 and is integrally attached to the upper portion of the rolling vertical rotating shaft 15. Further, the air is led out by being branched into two from the air lead-out joint 57 (FIG. 7A).

(3) Roller part A roller part is demonstrated using FIG.8 and FIG.11. 8 is a front view of a main part of the vacuum dryer focusing on the roller, and FIG. 11 is a cross-sectional view taken along the line BB of FIG.
A pair of horizontal rotating shafts 19 for rolling perpendicular to the spin vertical rotating shaft 13 are opposed to the bevel gear 61 above the bevel gear 61 provided below the basket 31 and above the vertical rotating shaft 13 for spinning. And provided on the same straight line. A bevel gear 62 that meshes with the bevel gear 61 provided on the upper part of the spin vertical rotation shaft 13 is provided at one end of each rolling horizontal rotation shaft 19, and the other end is provided at the center of the pair of roller shafts 18. A bevel gear 63 that meshes with the bevel gear 64 is provided. Each roller shaft 18 is provided so as to be orthogonal to the pair of rolling horizontal rotation shafts 19 in the same plane, and the pair of rollers 17 described above are provided at both ends thereof so as to rotate around the roller shaft 18. ing.
As a result, the vertical rotation of the spin vertical rotation shaft 13 is transmitted to the rolling horizontal rotation shaft 19 and the roller shaft 18, and the pair of rollers 17 attached to the roller shaft 18 rotates horizontally together with the roller shaft 18.

(4) Chuck part The chuck part will be described with reference to FIGS. FIG. 9 is a side view of the main part of the vacuum dryer focusing on the chuck, and FIG. 10 is a sectional view taken along line AA in FIG.
The mechanical chuck 21 resists the urging force of the spring 23 as a gripping part 21a composed of a pair of arms for gripping the basket 31, a spring 23 as an elastic member that urges the gripping part 21a in the closing direction. The cylinder 22 is configured to urge the gripping portion 21a in the opening direction, and the supply / discharge pipe 25 communicates with the inside of the rolling vertical rotation shaft 15 to supply and discharge fluid such as air to the cylinder 22.
The chuck 21 normally clamps and fixes the basket 31 with the biasing force of the spring 23, releases the pinching and fixing of the basket 31 against the biasing force of the spring 23 with the rod pushing force of the cylinder 22, and holds the basket 31 in the chuck 21. It is supposed to be released from. If the chuck 21 is configured such that the basket 31 is fixed by the spring 23 and the basket 31 is released by the cylinder 22, there is an advantage that the basket 31 can be fixed even when the air is cut off.
Thus, in the embodiment, the basket 31 is fixed by the mechanical chuck 21 at the time of spin drying.

  A semiconductor substrate such as a silicon wafer is known as an object to be dried for which spin drying is exclusively employed. The semiconductor substrate is at most about several 10 to 100 g, and when spin drying is performed in the air, it is generally fixed with a vacuum chuck. On the other hand, the objects to be dried which are mainly targeted by the present embodiment are precision press parts, plastic molded products, metal die cast parts, various metal cutting parts, printed circuit boards, module products, glass, lenses, etc. In addition, it is heavier than a silicon wafer. When the basket 31 is included, the weight is on the order of kg. If this is spun in vacuum, the vacuum chuck will not work. Therefore, in the chuck 21 of the embodiment, a mechanical chuck that functions effectively in a vacuum is used instead of a vacuum chuck. Moreover, the basket 31 is firmly clamped and fixed by the urging force of the spring 23 in order to withstand the weight as described above and spin.

  In addition, in order to spin heavy objects, it is necessary to consider the load resistance and vibration suppression of a frame (not shown) that houses the vacuum dryer. In the embodiment, the frame is reinforced by adding a plurality of support columns.

In addition, it is as follows if the specification, drying conditions, etc. of the vacuum dryer of this Embodiment are illustrated. The material of the vacuum chamber 10 is SUS304, and the size is □ 400 to 500 mm in the square tube chamber and φ400 to 600 mm in the cylindrical chamber. The material of the lid 8 is aluminum or an acrylic plate. The basket material is SUS304, and the basket size is φ200 to 300 mm for a cylindrical shape and □ 200 to 300 mm for a rectangular tube shape. The material of the chuck 21 is aluminum or SUS304, and the fixing force is 30 to 60 kgf / cm ² . Examples of the material of the light transmission window 41 include tempered glass, heat-resistant glass, quartz glass, germanium glass, and the like, but tempered glass or heat-resistant glass is preferable in terms of procurement and price.

  The heating lamp 42 is a near-infrared light bulb (R type or straight tube type), electric power is 2 to 10 kW (total electric power), and a heating temperature range is 50 to 150 ° C. The vacuum pump pressure of the vacuum exhaust unit 12c is 133 to 2660 Pa (1 to 20 Torr) in the vacuum type, and 133 Pa to 101.08 kPa (1 to 760 Torr) in the ejector type. The spin speed is 60 to 1000 rpm.

Next, the operation of the above-described configuration will be described separately for spin mode selection and combined mode selection.
[Spin mode selection]
Air is introduced into the cylinder 22 from the vertical rotating shaft 15 for rolling through the supply / discharge pipe 25, the chuck 21 is pushed open, and the basket 31 can be received. The object to be dried after washing is placed in the basket 31. The cleaning liquid used for the object to be dried is, for example, water, hydrocarbon (petroleum), or the like.

  The lid 8 is opened, the basket 31 is placed in the vacuum chamber 10 with the handle 31 a, positioned by the guide 30, and placed at a predetermined position in the vacuum chamber 10. The air in the cylinder 22 is exhausted to release the chuck 21, and the basket 31 is clamped and fixed by the chuck 21 by the biasing force of the spring 23.

  After closing the lid 8, the inside of the vacuum chamber 10 is evacuated by the vacuum exhaust unit 12 c of the exhaust system 12. This evacuation continues until atmospheric return.

  The heating lamp 42 is turned on, and radiation (radiation) heating of the object to be dried in the basket 31 is started through the light transmission window 41. Infrared rays should not hit the handle of the basket 31.

The spin driving mechanism 14 is operated to spin the basket 31 around the vertical axis. As a result, a continuous radiation vacuum spin state is created, and the object to be dried is dried.
When the ejector type is adopted, the exhaust gas sucked by the ejector 122 is cooled during this drying, and the liquid contained in the exhaust gas is condensed and taken out.

When drying is completed, evacuation by the evacuation unit 12c is stopped, and air is introduced from the air supply system 11 into the vacuum chamber 10 through the high performance filter 11c to return the inside of the vacuum chamber 10 to the atmosphere.
Air is injected into the cylinder 22 to release the chuck 21 from the basket 31, and the clamping and fixing by the chuck 21 is released.

  The lid 8 is opened, and the basket 31 is taken out from the vacuum chamber 10 by grasping the handle 31a. At this time, since the handle 31a is not heated, when the lid 8 is opened, the basket 31 can be immediately taken out from the vacuum chamber 10 without cooling.

As described above, according to the embodiment, there are the following effects.
Since vacuum, radiant heating, and spin are performed simultaneously, the object to be dried is dried in a short time of 2 to 3 minutes compared to the conventional heater heating in vacuum in the semiconductor industry. be able to.

  Further, by introducing the mechanical chuck 21 into the vacuum, the basket 31 can be fixed in the vacuum, and vacuum and spin can be realized. Further, since the basket 31 is firmly fixed with the simple structure of the spring 23, it is possible to realize vacuum spin drying of a heavy object of a maximum of 20 kg, preferably about 15 kg, while maintaining high-speed spin.

  In addition, the heating method is light (radiant heat) emitted from the heating lamp 42, and local heating can be performed, and the handle 31a of the basket 31 is not heated. Further, since spin is used in addition to the heating lamp 42, the object to be dried can be reliably heated.

  In addition, since the vacuum is in a vacuum, the boiling point of the cleaning liquid adhering to the object to be dried is low, and the temperature of the object to be dried does not increase so much. Moreover, since rapid heating can be performed in the absence of oxygen, an object to be dried washed with a hydrocarbon-based (petroleum-based) cleaning liquid can be safely dried. In addition, since it is carried out in a vacuum chamber, secondary contamination from the outside to the material to be dried can be suppressed, and clean drying can be achieved, which can be adapted to the era of environmental purification.

  In the embodiment, the chuck is configured to fix the basket with the spring and release the basket with the cylinder. However, the basket is fixed with the cylinder by reversing the relationship between the spring and the cylinder. You may make it accelerate | release releasing fixation of a cylinder as assistance.

[Use mode selection]
The lid 8 is opened, the basket 32 is placed in the vacuum chamber 10, and placed on the pair of rollers 17. The chuck 21 is held in an open state.

  The spinning drive mechanism 14 and the rolling drive mechanism 16 are operated to spin the basket 32 around the vertical axis, and the basket 32 is rolled around the horizontal axis by the roller 17. As a result, a continuous radiation vacuum spin / rolling state is created, and the material to be dried is dried. The spin speed is preferably 60 to 120 rpm. In this combined mode, since the basket 32 is not fixed by the chuck, it is necessary to suppress the spin rotation speed as compared with the spin mode. The rolling rotation speed is 0 to 30 rpm.

  When drying is completed, evacuation by the evacuation unit 12c is stopped, and air is introduced from the air supply system 11 into the vacuum chamber 10 through the high performance filter 11c to return the inside of the vacuum chamber 10 to the atmosphere.

  The lid 8 is opened and the basket 32 is taken out from the vacuum chamber 10 by grasping the handle.

  In the combined mode in which the rolling is combined with the spin, it is necessary to suppress the spin rotation speed as compared with the spin mode. However, since the rolling motion is added to the basket, the object to be dried can be heated more reliably. Rolling may be used in combination as needed, and the drying time can be sufficiently shortened by spin alone, but it is particularly effective for shortening the drying time for objects to be dried that are effective in rolling. Can be expected to do.

It is a general | schematic front sectional view of the vacuum dryer in embodiment. It is a perspective view which shows the various baskets in embodiment. It is a perspective view of the attachment / detachment mechanism at the time of basket mounting in an embodiment. It is a perspective view of the attachment / detachment mechanism after basket removal | desorption in embodiment. It is explanatory drawing which shows the vacuum exhaust unit in embodiment. It is an enlarged view of the principal part of the vacuum dryer in embodiment. FIG. 7 is a detailed explanatory diagram of a part A and a part B shown in FIG. 6. It is a front sectional view explaining the roller part of the vacuum dryer in an embodiment. It is a sectional side view explaining the chuck | zipper part of the vacuum dryer in embodiment. It is an AA arrow line view of FIG. It is a BB line arrow line view of FIG.

Explanation of symbols

10 Vacuum chamber (container)
12 Exhaust System 13 Spin Vertical Rotating Shaft 14 Spin Driving Mechanism 15 Rolling Vertical Rotating Shaft 16 Rolling Driving Mechanism 21 Chuck 30 Guide 31 Basket 32 Basket 41 Light Transmitting Window 42 Heating Lamp

Claims (5)

A vacuum dryer for drying an object to be dried contained in a basket,
A sealable container;
An exhaust system for evacuating the container;
A vertical rotation axis for spin inserted into the container in a vertical direction;
A guide provided on the vertical rotation shaft for spinning, and positioning the basket at a predetermined position in the container;
A mechanical chuck that holds the basket positioned by the guide and fixes the basket to the vertical rotation axis for spinning;
A spin driving mechanism that rotates the vertical rotation axis for spin to rotate the basket held by the chuck around the vertical axis;
A light transmissive window provided on the wall of the container;
A vacuum dryer comprising a heating lamp provided outside the container and radiatively heating an object to be dried accommodated in the basket through the light transmission window. The chuck includes a gripping portion including a pair of arms for fixing the basket, an elastic member that biases the gripping portion in a direction of gripping the basket, and the gripping against the biasing force of the elastic member. The vacuum dryer according to claim 1, further comprising a cylinder that urges the portion in a direction to release the grip of the basket. A vacuum dryer for drying a material to be dried contained in a basket,
A sealable container;
An exhaust system for evacuating the container;
A vertical rotation axis for spin inserted into the container in a vertical direction;
A spin drive mechanism for rotating the spin vertical rotation axis to rotate the rotary basket around the vertical axis;
A rolling vertical rotation shaft penetrating through the spin vertical rotation shaft;
A pair of rollers arranged in the horizontal direction on top of the vertical rotating shaft for rolling;
A transmission means for transmitting rotational movement between the rolling vertical rotation shaft and the pair of rollers;
A rolling drive mechanism that rotates the vertical rotating shaft for rolling and rolls a basket placed on the pair of rollers via the transmission means around a horizontal axis;
A light transmissive window provided on the wall of the container;
A vacuum dryer comprising a heating lamp provided outside the container and radiatively heating an object to be dried accommodated in the basket through the light transmission window.   The vacuum dryer according to any one of claims 1 to 3, wherein a bearing having a rotation seal is used at an insertion portion of the container wall into which the spin vertical rotation shaft is inserted.   The vacuum dryer according to any one of claims 1 to 4, wherein the light transmission window is tempered glass.

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