阅读说明：本技术 一种铝合金铸造模盘的高效节能加热装置及其使用方法 (Efficient energy-saving heating device for aluminum alloy casting die disc and application method thereof ) 是由 汪明东 郭章军 钟其新 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种铝合金铸造模盘的高效节能加热装置及其使用方法,涉及铝合金铸造模盘相关领域,为解决现有技术中的无法解决现有烘干工艺的烘干效率较为低下的问题,所述烘干箱的内部设置有第二安装块,所述第二安装块上设置有电机转轴,所述电机转轴上设置有转动板,所述转动板上设置有烘干器,所述转动板的后端设置有第二电机,所述烘干箱的外侧设置有密封垫条,所述烘干箱的下端设置有主体模盘,所述主体模盘的内部设置有铸造模槽,所述铸造模槽的下端设置有存砂层,所述存砂层的下端设置有加热电阻丝层,所述烘干箱的上端设置有固定柱,所述固定柱的上端设置有固定板,所述固定板的上端设置有第二电动推杆。(The invention discloses a high-efficiency energy-saving heating device of an aluminum alloy casting die disc and a using method thereof, relating to the related field of aluminum alloy casting die discs and solving the problem that the prior drying process cannot solve the problem of lower drying efficiency in the prior art, wherein a second mounting block is arranged in a drying box, a motor rotating shaft is arranged on the second mounting block, a rotating plate is arranged on the motor rotating shaft, a dryer is arranged on the rotating plate, a second motor is arranged at the rear end of the rotating plate, a sealing gasket is arranged on the outer side of the drying box, a main die disc is arranged at the lower end of the drying box, a casting die groove is arranged in the main die disc, a sand storage layer is arranged at the lower end of the casting die groove, a heating resistance wire layer is arranged at the lower end of the sand storage layer, a fixing column is arranged at the upper end of the drying box, and a fixing plate is arranged at the upper end of the fixing column, and a second electric push rod is arranged at the upper end of the fixed plate.)

1. The utility model provides an energy-efficient heating device of aluminum alloy casting die disc, includes stoving case (8), its characterized in that: the inside of stoving case (8) is provided with second installation piece (37), be provided with motor shaft (36) on second installation piece (37), be provided with rotor plate (34) on motor shaft (36), be provided with drying apparatus (35) on rotor plate (34), the rear end of rotor plate (34) is provided with second motor (38), the outside of stoving case (8) is provided with sealing gasket strip (9).

2. The efficient and energy-saving heating device for the aluminum alloy casting die disc as claimed in claim 1, wherein: the lower extreme of stoving case (8) is provided with main part die disc (10), the inside of main part die disc (10) is provided with casting die cavity (11), the lower extreme of casting die cavity (11) is provided with deposits sand bed (12), the lower extreme of depositing sand bed (12) is provided with heating resistance wire layer (13).

3. The efficient and energy-saving heating device for the aluminum alloy casting die disc as claimed in claim 1, wherein: the drying box is characterized in that a fixing column (7) is arranged at the upper end of the drying box (8), a fixing plate (6) is arranged at the upper end of the fixing column (7), and a second electric push rod (5) is arranged at the upper end of the fixing plate (6).

4. The efficient and energy-saving heating device for the aluminum alloy casting die disc as claimed in claim 3, wherein: the upper end of second electric putter (5) is provided with fixed strip (4), be provided with first electric slider (3) on fixed strip (4), be provided with first electric slide (1) on first electric slider (3), the lower extreme of first electric slide (1) is provided with first electric putter (2).

5. The efficient and energy-saving heating device for the aluminum alloy casting die disc as claimed in claim 1, wherein: the sealing structure is characterized in that a first sealing plate (22) is arranged at the upper end of the rotating plate (34), a second sealing plate (23) is arranged at the rear end of the first sealing plate (22), connecting blocks (24) are arranged at the lower ends of the second sealing plate (23) and the first sealing plate (22), a third electric push rod (25) is arranged on the connecting blocks (24), and a connecting sheet (26) is arranged on the third electric push rod (25).

6. The efficient and energy-saving heating device for the aluminum alloy casting die disc as claimed in claim 5, wherein: the upper end of first closing plate (22) is provided with connecting roller (29), be provided with brush hair (30) that absorb water on connecting roller (29), the upper end of connecting roller (29) is provided with second adapter sleeve (28), the upper end of second adapter sleeve (28) is provided with fourth electric putter (27), one side of fourth electric putter (27) is provided with hydrojet (31), the upper end of hydrojet (31) is provided with first installation piece (32), the opposite side of fourth electric putter (27) is provided with heater (33).

7. The efficient and energy-saving heating device for the aluminum alloy casting die disc as claimed in claim 6, wherein: the upper end of the fourth electric push rod (27) is provided with a rotating wheel (18), the rotating wheel (18) is fixedly connected with the fourth electric push rod (27), the rotating wheel (18) is provided with a fixed disc (17), the fixed disc (17) and the rotating wheel (18) are set to be in rotating connection, the rear end of the fixed disc (17) is provided with a fixed bar (16), the fixed bar (16) is set to be in an inverted L shape, the fixed bar (16) is fixedly connected with the fixed disc (17), the lower end of the fixed bar (16) is provided with a second electric slide block (15), the second electric slide block (15) is fixedly connected with the fixed bar (16), the lower end of the second electric slide block (15) is provided with a second electric slide way (14), the second electric slide way (14) and the second electric slide block (15) are set to be in electric connection, the front end of the fixed disc (17) is provided with a first connecting sleeve (19), first adapter sleeve (19) and rotation wheel (18) fixed connection, the front end of first adapter sleeve (19) is provided with first motor (20), be provided with the drive pivot on first motor (20), and the drive pivot passes through the coupling joint with first motor (20), the lower extreme of first motor (20) is provided with motor cabinet (21), motor cabinet (21) passes through bolted connection with first motor (20), motor cabinet (21) and second electric slider (15) fixed connection.

8. An application method of an energy-efficient heating device of an aluminum alloy casting die disc is realized based on the energy-efficient heating device of the aluminum alloy casting die disc of any one of claims 1 to 7, and is characterized by comprising the following steps:

the method comprises the following steps: a user can adjust the position of the fixing strip (4) through the first electric slide way (1) and the first electric slide block (3) which are electrically connected, so that the sealing gasket strip (9) can be attached to the outer side of the casting die cavity (11), the connecting block (24) is driven to move through the third electric push rod (25), and the first sealing plate (22) and the second sealing plate (23) can be separated;

step two: a user drives the connecting roller (29) to move through the fourth electric push rod (27), meanwhile, the first connecting sleeve (19) is driven to rotate through the first motor (20) to rotate the rotating wheel (18), pendulum type rotation of the connecting roller (29) is achieved through rotation of the rotating wheel (18), moisture and accumulated water in the casting die cavity (11) are absorbed, after absorption is completed, the connecting roller (29) is retracted through the fourth electric push rod (27), and drying treatment is conducted on the connecting roller (29) through the heater (33);

step three: after the connecting roller (29) finishes working, the third electric push rod (25) is used for driving the connecting block (24) to move, so that the first sealing plate (22) and the second sealing plate (23) can be attached again, the second motor (38) is used for driving the rotating plate (34) to rotate, the dryer (35) on the rotating plate (34) can absorb moisture in the casting die cavity (11) again, and heating treatment of the heating device can be achieved.

Technical Field

The invention relates to the field of aluminum alloy casting mold plates, in particular to a high-efficiency energy-saving heating device for an aluminum alloy casting mold plate and a using method thereof.

Background

The casting of the mould is to form the structural shape of the part by using other easily-formed materials in advance, then put the mould into a sand mould, so that a cavity with the same structural size as the part is formed in the sand mould, pour a fluid liquid into the cavity, and form the part with the same structural shape as the mould after the liquid is cooled and solidified. The casting mold plate is an important part in the casting process, and moisture often remains on the mold plate when the existing aluminum alloy casting is cast, so the aluminum alloy casting needs to be baked on the surface of the mold plate before casting, and the moisture on the surface of the mold plate is dried.

The existing heating process of the aluminum alloy casting die plate is to dry and heat the moisture on the die plate by holding a heating spray gun by a user, so that the drying process of the die plate can be finished only by using long-time work, and further the heating process greatly depends on the working experience of workers; therefore, the market urgently needs to develop an efficient energy-saving heating device of the aluminum alloy casting die disc to help people to solve the existing problems.

Disclosure of Invention

The invention aims to provide an efficient and energy-saving heating device for an aluminum alloy casting die disc, which aims to solve the problem that the drying efficiency of the existing drying process is low.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an energy-efficient heating device of aluminum alloy casting die disc, includes the stoving case, the inside of stoving case is provided with second installation piece, be provided with motor shaft on the second installation piece, the last rotor plate that is provided with of motor shaft, be provided with the drying apparatus on the rotor plate, the rear end of rotor plate is provided with the second motor, the outside of stoving case is provided with sealed filler strip.

Preferably, the lower extreme of stoving case is provided with the main part die disc, the inside of main part die disc is provided with the casting die cavity, the lower extreme of casting die cavity is provided with deposits the sand layer, the lower extreme of depositing the sand layer is provided with the heating resistance silk layer.

Preferably, the upper end of stoving case is provided with the fixed column, the upper end of fixed column is provided with the fixed plate, the upper end of fixed plate is provided with second electric putter.

Preferably, the upper end of the second electric push rod is provided with a fixing strip, the fixing strip is provided with a first electric slide block, the first electric slide block is provided with a first electric slide way, and the lower end of the first electric slide way is provided with a first electric push rod.

Preferably, the upper end of the rotating plate is provided with a first sealing plate, the rear end of the first sealing plate is provided with a second sealing plate, the lower ends of the second sealing plate and the first sealing plate are both provided with a connecting block, the connecting block is provided with a third electric push rod, and the third electric push rod is provided with a connecting sheet.

Preferably, the upper end of the first sealing plate is provided with a connecting roller, the connecting roller is provided with water-absorbing bristles, the upper end of the connecting roller is provided with a second connecting sleeve, the upper end of the second connecting sleeve is provided with a fourth electric push rod, one side of the fourth electric push rod is provided with a liquid sprayer, the upper end of the liquid sprayer is provided with a first mounting block, and the other side of the fourth electric push rod is provided with a heater.

Preferably, a rotating wheel is arranged at the upper end of the fourth electric push rod, the rotating wheel is fixedly connected with the fourth electric push rod, a fixed disc is arranged on the rotating wheel, the fixed disc and the rotating wheel are rotatably connected, a fixed rod is arranged at the rear end of the fixed disc, the fixed rod is arranged in an inverted L shape, the fixed rod is fixedly connected with the fixed disc, a second electric slider is arranged at the lower end of the fixed rod, the second electric slider is fixedly connected with the fixed rod, a second electric slideway is arranged at the lower end of the second electric slider, the second electric slideway is electrically connected with the second electric slider, a first connecting sleeve is arranged at the front end of the fixed disc, the first connecting sleeve is fixedly connected with the rotating wheel, a first motor is arranged at the front end of the first connecting sleeve, and a driving rotating shaft is arranged on the first motor, and the driving rotating shaft is connected with the first motor through a coupling, the lower end of the first motor is provided with a motor base, the motor base is connected with the first motor through a bolt, and the motor base is fixedly connected with the second electric sliding block.

The use method of the high-efficiency energy-saving heating device of the aluminum alloy casting die disc comprises the following steps:

the method comprises the following steps: a user can adjust the position of the fixing strip through the first electric slide way and the first electric slide block which are electrically connected, so that the sealing gasket strip can be attached to the outer side of the casting die cavity, the connecting block is driven to move through the third electric push rod, and the first sealing plate and the second sealing plate can be separated;

step two: a user drives the connecting roller to move through the fourth electric push rod, and simultaneously drives the first connecting sleeve to rotate through the first motor so as to rotate the rotating wheel, the pendulum type rotation of the connecting roller is realized through the rotation of the rotating wheel, so that the moisture and accumulated water in the casting die cavity are absorbed, after the absorption is finished, the connecting roller is retracted through the fourth electric push rod, and the connecting roller is dried through the heater;

step three: after the work of connecting roller is accomplished, can drive the connecting block through third electric putter and remove to make first closing plate and second closing plate laminate again, rethread second motor drives the rotor plate and rotates, thereby make the drying apparatus on the rotor plate can absorb the inside moisture of casting die cavity once more, can realize the heat treatment to this heating device.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, through the arrangement of the second motor, the rotating plate and the dryers, when a user uses the high-efficiency energy-saving heating device, the user can drive the rotating plate to rotate through the second motor, so that the moisture in the casting die cavity is dried through the arrangement of the dryers, and the drying efficiency of the whole high-efficiency energy-saving heating device can be greatly improved;

2. according to the invention, through the arrangement of the fourth electric push rod, the first motor, the liquid sprayer and the heater, when a user uses the high-efficiency energy-saving heating device, the user can adjust the height of the connecting roller through the arrangement of the fourth electric push rod, and simultaneously can realize that the connecting roller can rotate in a pendulum manner through the arrangement of the first motor, and through the arrangement of the liquid sprayer, cleaning liquid is sent to the connecting roller to realize the subsequent cleaning of a casting mold slot, and finally, through the arrangement of the heater, the heating and drying treatment of the connecting roller after moisture absorption is finished can be realized, so that the use pressure of the user can be greatly relieved;

3. according to the invention, through the arrangement of the sand storage layer and the heating resistance wire layer, when a user uses the high-efficiency energy-saving heating device, the user can heat the sand storage layer through the arrangement of the heating resistance wire layer, and can store heat through the physical properties of the sand storage layer, so that the phenomenon that the heat in the casting die cavity is rapidly dissipated can be prevented, the use pressure of the user can be relieved to a certain extent, and the energy consumed by the dryer during drying can be further reduced to a certain extent.

Drawings

FIG. 1 is a schematic cross-sectional structural view of a drying box of the present invention;

FIG. 2 is a schematic structural view of a drying box of the present invention;

FIG. 3 is a rear view of the drying box of the present invention;

FIG. 4 is a partial cross-sectional structural schematic of the present invention;

fig. 5 is a schematic top view of the present invention.

In the figure: 1. a first electrically powered slide; 2. a first electric push rod; 3. a first electric slider; 4. a fixing strip; 5. a second electric push rod; 6. a fixing plate; 7. fixing a column; 8. a drying box; 9. a sealing gasket strip; 10. a main body mold; 11. casting a mold cavity; 12. storing a sand layer; 13. heating the resistance wire layer; 14. a second motorized slide; 15. a second electric slider; 16. fixing the rod; 17. fixing the disc; 18. a rotating wheel; 19. a first connecting sleeve; 20. a first motor; 21. a motor base; 22. a first sealing plate; 23. a second sealing plate; 24. connecting blocks; 25. a third electric push rod; 26. connecting sheets; 27. a fourth electric push rod; 28. a second connecting sleeve; 29. a connecting roller; 30. water-absorbing bristles; 31. a liquid sprayer; 32. a first mounting block; 33. a heater; 34. a rotating plate; 35. a dryer; 36. a motor shaft; 37. a second mounting block; 38. a second motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-5, an embodiment of the present invention is shown: the utility model provides an energy-efficient heating device of aluminum alloy casting die disc, including stoving case 8, the inside of stoving case 8 is provided with second installation piece 37, second installation piece 37 is provided with a plurality ofly, second installation piece 37 and stoving case 8 fixed connection, be provided with motor shaft 36 on the second installation piece 37, motor shaft 36 sets up to rotate with second installation piece 37 and is connected, be provided with rotor plate 34 on the motor shaft 36, rotor plate 34 and motor shaft 36 fixed connection, be provided with drying apparatus 35 on the rotor plate 34, drying apparatus 35 passes through bolted connection with rotor plate 34, the rear end of rotor plate 34 is provided with second motor 38, second motor 38 passes through the coupling joint with motor shaft 36, the outside of stoving case 8 is provided with sealing gasket strip 9, sealing gasket strip 9 sets up to the rectangle strip, sealing gasket strip 9 sets up to paste with stoving case 8 and is connected.

Further, the lower extreme of stoving case 8 is provided with main part template 10, and the inside of main part template 10 is provided with casting die cavity 11, and casting die cavity 11 is provided with a plurality ofly, and the lower extreme of casting die cavity 11 is provided with deposits sand layer 12, and the inside of depositing sand layer 12 sets up to the grit, and the lower extreme of depositing sand layer 12 is provided with heating resistance wire layer 13, and the inside of heating resistance wire layer 13 is provided with heating resistance wire.

Further, the upper end of stoving case 8 is provided with fixed column 7, fixed column 7 sets up to the rectangle column, fixed column 7 is provided with a plurality ofly, fixed column 7 and 8 fixed connection of stoving case, the upper end of fixed column 7 is provided with fixed plate 6, fixed plate 6 sets up to the rectangular plate form, fixed plate 6 and fixed column 7 fixed connection, the upper end of fixed plate 6 is provided with second electric putter 5, the quantity of second electric putter 5 sets up to unanimous with the quantity of fixed plate 6, second electric putter 5 sets up to fixed connection with fixed plate 6.

Further, the upper end of second electric putter 5 is provided with fixed strip 4, fixed strip 4 sets up to the rectangle strip, fixed strip 4 is provided with a plurality ofly, fixed strip 4 and 5 fixed connection of second electric putter, be provided with first electric slider 3 on the fixed strip 4, first electric slider 3 and fixed strip 4 fixed connection, be provided with first electric slide 1 on the first electric slider 3, first electric slide 1 sets up to electric connection with first electric slider 3, the lower extreme of first electric slide 1 is provided with first electric putter 2, first electric putter 2 is provided with four, first electric putter 2 and 1 fixed connection of first electric slide.

Further, the upper end of the rotating plate 34 is provided with a first sealing plate 22, the first sealing plate 22 is arranged to be rectangular plate-shaped, the first sealing plate 22 is arranged to be attached to the drying box 8, the rear end of the first sealing plate 22 is provided with a second sealing plate 23, the shape and size of the second sealing plate 23 are arranged to be consistent with those of the first sealing plate 22, the second sealing plate 23 is provided with a connecting block 24 with the lower end of the first sealing plate 22, the connecting block 24 is provided with a plurality of connecting blocks, the connecting block 24 is arranged to be L-shaped, a third electric push rod 25 is arranged on the connecting block 24, the number of the third electric push rod 25 is arranged to be consistent with that of the connecting blocks 24, the third electric push rod 25 is fixedly connected with the connecting block 24, a connecting sheet 26 is arranged on the third electric push rod 25, the connecting sheet 26 is arranged to be rectangular plate-shaped, and the connecting sheet 26 is fixedly connected with the third electric push rod 25.

Further, a connecting roller 29 is arranged at the upper end of the first sealing plate 22, water-absorbing bristles 30 are arranged on the connecting roller 29, the water-absorbing bristles 30 are fixedly connected with the connecting roller 29, a second connecting sleeve 28 is arranged at the upper end of the connecting roller 29, the second connecting sleeve 28 is rotatably connected with the connecting roller 29, a fourth electric push rod 27 is arranged at the upper end of the second connecting sleeve 28, the fourth electric push rod 27 is fixedly connected with the second connecting sleeve 28, a liquid sprayer 31 is arranged on one side of the fourth electric push rod 27, a first mounting block 32 is arranged at the upper end of the liquid sprayer 31, the first mounting block 32 is connected with the liquid sprayer 31 through bolts, a heater 33 is arranged on the other side of the fourth electric push rod 27, and the heater 33 is connected with the drying box 8 through bolts.

Further, a rotating wheel 18 is arranged at the upper end of a fourth electric push rod 27, the rotating wheel 18 is fixedly connected with the fourth electric push rod 27, a fixed disc 17 is arranged on the rotating wheel 18, the fixed disc 17 is rotatably connected with the rotating wheel 18, a fixed rod 16 is arranged at the rear end of the fixed disc 17, the fixed rod 16 is arranged in an inverted L shape, the fixed rod 16 is fixedly connected with the fixed disc 17, a second electric slider 15 is arranged at the lower end of the fixed rod 16, the second electric slider 15 is fixedly connected with the fixed rod 16, a second electric slideway 14 is arranged at the lower end of the second electric slider 15, the second electric slideway 14 is electrically connected with the second electric slider 15, a first connecting sleeve 19 is arranged at the front end of the fixed disc 17, the first connecting sleeve 19 is fixedly connected with the rotating wheel 18, a first motor 20 is arranged at the front end of the first connecting sleeve 19, a driving rotating shaft is arranged on the first motor 20, and the driving rotating shaft is connected with the first motor 20 through a coupler, the lower extreme of first motor 20 is provided with motor cabinet 21, and motor cabinet 21 passes through bolted connection with first motor 20, motor cabinet 21 and the electronic slider 15 fixed connection of second.

The use method of the high-efficiency energy-saving heating device of the aluminum alloy casting die disc comprises the following steps:

the method comprises the following steps: a user can adjust the position of the fixing strip 4 through the electrically connected first electric slideway 1 and the electrically connected first electric slider 3, so that the sealing gasket strip 9 can be attached to the outer side of the casting mold cavity 11, and the third electric push rod 25 drives the connecting block 24 to move, so that the first sealing plate 22 and the second sealing plate 23 can be separated;

step two: a user drives the connecting roller 29 to move through the fourth electric push rod 27, and simultaneously drives the first connecting sleeve 19 to rotate through the first motor 20 so as to rotate the rotating wheel 18, and the pendulum type rotation of the connecting roller 29 is realized through the rotation of the rotating wheel 18, so that the moisture and accumulated water in the casting mold cavity 11 are absorbed, and after the absorption is finished, the connecting roller 29 is retracted through the fourth electric push rod 27, and the connecting roller 29 is dried through the heater 33;

step three: after the connecting roller 29 finishes working, the third electric push rod 25 drives the connecting block 24 to move, so that the first sealing plate 22 and the second sealing plate 23 can be attached again, and the second motor 38 drives the rotating plate 34 to rotate, so that the dryer 35 on the rotating plate 34 can absorb moisture inside the casting mold cavity 11 again, and the heating treatment of the heating device can be realized.

The working principle is as follows: when the device is used, the high-efficiency energy-saving heating device of the whole aluminum alloy casting die disc is firstly checked, the device can be used, a user can adjust the position of the fixing strip 4 through the first electric slide way 1 and the first electric slide block 3 which are electrically connected, so that the sealing gasket strip 9 can be attached to the outer side of the casting die groove 11 and can drive the connecting block 24 to move through the third electric push rod 25, the first sealing plate 22 and the second sealing plate 23 can be separated, the user can drive the connecting roller 29 to move through the fourth electric push rod 27 and simultaneously drive the first connecting sleeve 19 to rotate through the first motor 20, so that the rotating wheel 18 can rotate, the clock rotation of the connecting roller 29 is realized through the rotation of the rotating wheel 18, the moisture and accumulated water in the casting die groove 11 can be absorbed, and after the absorption is completed, the connecting roller 29 is retracted by the fourth electric push rod 27, the connecting roller 29 is dried by the heater 33, after the connecting roller 29 finishes working, the connecting block 24 is driven by the third electric push rod 25 to move, so that the first sealing plate 22 and the second sealing plate 23 can be attached again, the rotating plate 34 is driven by the second motor 38 to rotate, so that the moisture in the casting mold cavity 11 can be absorbed again by the dryer 35 on the rotating plate 34, and the heating device can be heated, and meanwhile, in the process of using the high-efficiency energy-saving heating device, a user can drive the rotating plate 34 to rotate by the second motor 38, so that the moisture in the casting mold cavity 11 can be dried by the arrangement of the dryers 35, and the drying efficiency of the whole high-efficiency energy-saving heating device can be greatly improved, meanwhile, the height adjustment of the connecting roller 29 can be realized through the arrangement of the fourth electric push rod 27, the connection roller 29 can rotate in a pendulum mode through the arrangement of the first motor 20, cleaning liquid is sent to the connecting roller 29 through the arrangement of the liquid sprayer 31 so as to realize the subsequent cleaning of the casting die cavity 11, finally, the heating and drying treatment of the connecting roller 29 after moisture absorption is finished can be realized through the arrangement of the heater 33, the use pressure of a user can be greatly relieved, the heating of the sand storage layer 12 can be realized through the arrangement of the heating resistance wire layer 13, the storage of heat can be realized through the physical performance of the sand storage layer 12, the phenomenon that the heat in the casting die cavity 11 is rapidly dissipated can be prevented, and the use pressure of the user can be relieved to a certain extent, further, the energy consumed for drying by the dryer 35 can be reduced to some extent.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.