CN1068769A - A kind of apparatus and method with producing articles with waste mineral wool - Google Patents

Abstract

The invention belongs to mineral wool (containing mineral wool slag, rock wool, glass wool, aluminium silicate wool etc.) lagging material production of articles technical field.It is made up of major equipments such as opener A, wadding machine B, rolling machine C or laminator D.The production technique of this equipment belongs to dry technology for production.It is to have utilized opener to add the opener method of wind-force with the waste cotton shredding, through in the process of cotton fibre in natural subsidence of shredding through the machinery of multistage different modes, after the tackiness agent that fully atomizes of glue spraying head ejection mixes, make the cotton carpet veneer of desired thickness again by wadding machine.

Description

A kind of apparatus and method with producing articles with waste mineral wool

The present invention relates to a kind of production equipment and production method that is used to produce mineral wool (containing slag wool, rock wool, glass wool, aluminium silicate wool etc.) lagging material goods, specifically mineral waste cotton (the cotton and irregular raw cotton of the shape that looses) can be made the production equipment and the method for the lagging material goods of different varieties and specification exactly through reprocessing.

At present, the mineral wool lagging material goods of selling on the market all are that the uniform cotton felt that adopts the cotton fibre of being made by glass wool making machine directly to be deposited on the settling pocket foraminous conveyer is done.And the production equipment and the method (dry method) that do not adopt the cotton regeneration of mineral waste to produce the lagging material goods.Now existing people begins to utilize manual operations to produce above mineral waste cotton is carried out some and utilizes (belonging to wet type method for producing) to process simply again, but the quality product extreme difference, labor condition and environment are abominable.

The object of the present invention is to provide a kind of new production equipment and method (belonging to dry method production process), above mineral waste cotton is reprocessed, for the utilization again of mineral waste cotton provides a practicable new way, also provide supporting production equipment and method for existing production of producing mineral wool enterprise.

The present invention is achieved in that the machinery that has adopted multistage different modes adds the opener production equipment and the method for wind-force, and it provides possible prerequisite for utilizing again of mineral waste cotton.Make released cotton fibre have an opportunity in settled process, to add tackiness agent equably, and make uniform cotton felt through wadding machine and use for next procedure.Be attached thereto the insulating pipe goods that the rolling machine that connects can become cotton felt auto reeling all size.If change rolling machine into laminator, just can make goods such as the insulation quilt of different thickness and warming plate.

The present invention is owing to installed the matching used with it facility that gathers dust, and the operating system of little negative pressure recirculating air, and machine is in the condition of little negative pressure and works.Make production environment improve greatly, the operator can wait for the machine side more like a cork and produce.

Fig. 1 is the structural representation of opener A of the present invention;

Fig. 2 is the structural representation of wadding machine B of the present invention;

Fig. 3 is the structural representation of rolling machine C of the present invention;

Fig. 4 is the structural representation of laminator D of the present invention;

Fig. 5 is the Facad structure synoptic diagram of cotton roller 5;

Fig. 6 pulls cotton roller 2 and flute profile guipure 12 work synoptic diagram;

Fig. 7 is stripping roller 22 and flute profile guipure 12 work synoptic diagram;

Fig. 8 is travelling screen 14 local schematic top plan view;

Fig. 9 is overall schematic of the present invention and the little negative pressure recirculating air principle of operation figure that gathers dust;

Figure 10 is the partial top view of foraminous conveyer 28;

Figure 11 is the antiseized structural representation of roller 35;

Figure 12 is screen belt 28 gap bridge synoptic diagram;

Figure 13 is grooved guide roller 38 and steel band 28 work synoptic diagram.

Embodiments of the invention mainly are made up of equipment such as opener A, wadding machine B and rolling machine C or laminator D.

As shown in Figure 1, opener A is by feeding part, go up cotton part, the opener part, the air-supply part, travelling screen 14 and electric motor 24 are formed, feeding part is by hopper 8, conveying belt 9, sealing curtain 10 and sprocket wheel 11 formation that links together, last cotton part is by cotton roller 5, tightening pulley 6, pull cotton roller 2 and flute profile guipure 12 formation that is close together, the opener part leans against stripping roller 22 by flute profile guipure 12, form on the following stripping roller 19, the air-supply part is by blast pipe 1, windsheild 3, blast inlet 4 and casing 7 constitute, travelling screen 14 is by axle 15, sprocket for main drive 16, following row's axle 17, last row's axle 18 constitutes, and electric motor 24 drives sprocket for main drive 16 simultaneously through sprocket wheel 23, following stripping roller 19, sprocket wheel 11, tightening pulley 6, cotton roller 5, pull cotton roller 2, sprocket wheel 25, last stripping roller 22 rotates together.

Its production method is: hopper 8 is put into waste cotton to be processed wherein, by sprocket wheel 11 drive conveying belt 9 waste cotton being transported process sealing curtain 10 enters in the casing, and arriving flute profile guipure 12 places that drive by sprocket wheel 25, the main effect of guipure 12 is openers, secondly is to carry cotton.By it most of waste cotton is inserted in crown place band upward, the unnecessary cotton-wool of not plugging comes back on the foraminous conveyer 9.The things such as bits that be mingled with this moment in cotton are partly isolated, and discharge by deslagging bucket 13.The cotton that falls above and add the summation that material bin transports the cotton that comes and should cotton amount greater than flute profile guipure 12 total, unnecessary like this cotton can play an additional effect in cotton insufficient place on flute profile guipure 12, make the crown on the guipure 12 can overwork cotton.Because the density of this waste cotton is bigger, and fiber is very crisp, tooth on the flute profile guipure 12 is difficult for inserting the inside of cotton-wool, so be provided with a cotton roller 5 here, pressing plate above it adopts flexible materialss such as rubber plate or soft plastic board, the cross-sectional shape of pressing plate is the shape of gear involute urve, and the front is a discontinuous form, but the every equal free bend activity of soft board K as shown in Figure 5.Roller 5 clockwise rotates under the effect of chain tightening pulley 6, and it can be finished and will hang over the root that cotton on flute profile guipure 12 crowns is pressed into tooth.Pulling cotton roller 2 also clockwise rotates, many draw points are housed on roller, the cross section draw point system of roller adopts the curved shape of gear involute urve, its bending direction is opposite with pressing plate on the roller 5, effect is that too much cotton (promptly being exposed at the outer cotton of flute profile guipure tooth) is shut down, and guarantees that the cotton amount of going up of flute profile guipure 12 is certain value.Pull cotton roller 2 course of action, as shown in Figure 6, for fear of the damage of cotton fibre, the tooth on the flute profile guipure 12 is designed to a curved shape, and it is similar to a section an of circular arc line.Crown movement locus on the guipure be straight line upwards, and what pull that the tip of draw point on the cotton roller 2 does is that circumference rotatablely moves, and is a curve.For inserting cotton-wool (with the master that is inserted as at draw point tip) earlier mutually, promptly two power F1 and F2 equal and opposite in direction, direction are opposite at 0 relative movement orbit for both.When turning over after 0, the directed force F 1 at draw point tip turns to the direction of F3 gradually, forms the strength of a garnetting, and cotton-wool is ripped from the centre, has kept the integrity of fiber effectively.When flute profile guipure 12 overworks cotton position when forwarding last stripping roller 22 places that do to be rotated counterclockwise to, because of last stripping roller 22 many draw points also are housed all around, the draw point direction in roller cross section all with the axis normal of roller 22.The tip of draw point intersects with tooth on the flute profile guipure 12 inserts certain distance, but staggers mutually in the direction along axis, should guarantee not bump when relative movement.So peel off down one deck near stripping roller 22 on the cotton-wadded quilt at crown place.Here owing to adopted the tooth of curved flute profile guipure and the stripping method that matches with the draw point of axis normal, as shown in Figure 7, when both relative movement, the crown of guipure 12 has a power F1 of deflection left, stripping roller draw point point then has a power F2 of deflection to the right, and the action of draw point is to insert cotton layer inside earlier, and then pulls to the right, so when peeling off, only peel surperficial one deck, and can all not take out of.The cotton that is peeled is thrown to the below through charging guide plate 20.Supporting roll 21 is the shakes that are used for alleviating flute profile guipure 12, avoids stripping roller isodont guipure to collide.By the wind of airduct 1 in blast inlet 4 enters guipure 12, (form many slotted holes because all leave certain distance between every block of carrier bar of guipure 12, account for the guipure total area 1/2nd), so under the effect of windsheild 3, wind is from after one deck cotton that the slotted hole on the guipure 12 will remain forward in flute profile guipure 12 roots blows to crown, by the following stripping roller doing to be rotated counterclockwise 19 it is all stripped out again, roller 19 is identical with the action of roller 22, effect is the same, and just the degree of depth of tooth is more more on the draw point intersection insertion flute profile guipure 12.All fall in the travelling screen 14 of opener bottom through the cotton that peels off for twice, pass to sprocket for main drive axle 16 through sprocket wheel 23 by chain by motor 24, by several groups of geartransmissions, some that drive in the travelling screen 14 have the upward row axle 18 of many draw points and arrange axle 17 down again.Wherein each two adjacent axles turn to difference, rotating speed is also different.Therefore, can play effect,, fall into the wadding machine B of travelling screen below by travelling screen 14 with the cotton-wool garnetting.As shown in Figure 8, the draw point a of row's axle in correspondence with each other on the travelling screen 14, be mainly used in the garnetting cotton-wool, the draw point b of following row's axle 17 and the interlaced insertion of last row axle 18 draw points, mainly be that the fiber that is wrapped on row's axle 18 is shut down, secondly can also play the effect that stops the cotton-wool that leaked by last row's axle.Because last row axle 18 and organic cooperation of row's axle 17 down make travelling screen 14 can stop that cotton-wool plays the effect of sieve, can play the cotton-wool of shredding of failing that to be blocked simultaneously again and continue the purpose of shredding.

The blast of supplying with opener and wadding machine comes from same wind circulating system, as shown in Figure 9.By blower fan 93 wind in the wadding machine is drawn by air outlet 31, get in the air expansion case 89, trunk for expansion is provided with a dust-precipitator 90, also be provided with an air outlet 91, by adjusting valve 92 control air quantity, air outlet 91 is connected with the blast pipe 1 of opener, and the wind that enters opener A is extracted out by blower fan 93 through wadding machine B, blast height when adjusting valve 92 is used for adjusting equipment work that is to say that the negative pressure in the equipment is to realize by the resistance of adjusting valve.Opener A and wadding machine B should often be in the situation of little negative pressure to be operated.In works better, have only seldom wind through dust-precipitator 90 emptyings, because of the poorly sealed air quantity that bleeds, promptly equipment was by the air quantity of inspiration beyond the wind circulating system when its exhaust air rate equaled equipment work.

As shown in Figure 2, wadding machine B is made of casing 27, glue spraying head 26, foraminous conveyer 28, defeated slag guipure 30, compaction part, guipure wash section and motor 44.Glue spraying head 26 is fixed on the inwall of casing 27, has air suction inlet 31 on the casing 27 and draws cinder notch 33.Foraminous conveyer 28 is enclosed within on holder axle 29, main driving axle 42, grooved guide roller 38, guide roller 48, the grooved guide roller 51 and constitutes.Defeated slag guipure 30 is enclosed within on main drive roller 32 and the carrying roller 29, and compaction part is made of rocking arm 34, roller 35, guipure 36 and roll shaft 37.The guipure wash section is made of cleaning water pond 49, transmission chain 47, brush beaming roller 50.Electric motor 44 drives sprocket wheel 40 respectively by sprocket wheel 45, chain 43 and chain 46 and main driving axle 32 rotates, and drives brush beaming roller 50 by pair of sprocket through chain 47 by main driving axle 32 and rotates.Its production method is: in the fiber that travelling screen 14 falls enters casing 27, in the process that falls with fully atomizing of one or two glue spraying head 26 ejections tackiness agent mix.In above process, still there are some littler slag balls when descending, to be separated by the resistance of air.Little slag ball drops on earlier on the foraminous conveyer 28, because foraminous conveyer 28 is made up of the ring-like steel band of some sealings, leave certain spacing between every, it is netted to form the stripe shape sieve, as shown in figure 10, so little slag ball can waltz through and fall on the defeated slag guipure 30, under the drive of chain 46 and main drive roller 32, bits are sent to draws cinder notch 33 places.The fiber that is mixed with tackiness agent is tackled on guipure 28 under the suction function of air suction inlet 31 quickly and effectively, and guipure 28 is driven guipure main drive roller sprocket wheel 40 by the sprocket wheel on the motor 44 45 by chain 43 and drags, and the continuously and smoothly travels forward.Because the glue fiber that contains that descends is a certain value, so on guipure 28, just can form layer of even carpet veneer (thickness of carpet veneer is to rely on the opener amount of opener A to decide, and the opener driving motor is a buncher).In order to make guipure 28 smooth, some carrying rollers 29 below guipure, have been added.The cotton layer that is deposited on the guipure 28 is held out wadding machine by guipure 28 after 35 compactings of compacting lock wind roller.Roller 35 is spacing by rocking arm 34, fluctuates.Pony roll axle 37 and little guipure 36 prevention felts are bonded on the roller 35 and establish.Little guipure 36 is made up of the nylon fake of many sealings, leave certain interval between every circle, on roller 35 and roller 37, all process ring groove at interval by this along axis direction, every nylon rope all moves in groove separately, as shown in figure 11, they can strip down the felt that is bonded on the roller 35.Between main driving axle 42 and rolling machine C live roll 41 or laminator D live roll 41, be provided with the transition guipure and pass a bridge 39, as shown in figure 12, the transition guipure is to be rearranged by many steel wires, it is spaced apart the interval of every steel band of steel mesh belt 28, promptly insert a steel wire 39 in per two gap, a wherein end of steel wire is fixed on the support 94, and the other end rides on the roller 41.It can make carpet veneer successfully carry out the transition on the guipure 54 of rolling machine C from the guipure 28 of wadding machine B.Continue to recycle under the effect of grooved guide roller 38 and grooved guide roller 51 and flat guide roller 48 with the abortive haul band 28 after the carpet veneer disengaging, repeat above-mentioned working process.The main effect of grooved guide roller 38 and grooved guide roller 51 is to prevent moving vertically of guipure 28, and as shown in figure 13, they are to have many ring groove roll shafts of slightly being wider than steel band along uniform on the direction of axis, and every steel band all moves in ring shaped slot separately.Guipure 28 below be provided with a clear water dishwashing 49, and one is done continuously to clean with the 50 pairs of guipures of brush beaming roller 28 that rotate by transmission chain 47.

As shown in Figure 3, rolling machine C is by being sleeved on main drive roller group 55, paying the moulding guipure 54 on main drive roller 53, main forming roller 58, main forming roller 59, deflector roll 62, roller 65 and the counterweight roller 67, driving removable with the chain 43 that is enclosed within on the main drive roller group 55, in a side near pair live roll 53, clutch coupling 52 is housed, and the side that movable tube core 60 leans against main forming roller 58 and main forming roller 59 constitutes jointly.Because the cotton fibre of the raw material that this production method is used is shorter, the carpet veneer tensile strength of making is lower, so adopted mandatory full packaging type extruding filament winding process to produce insulating pipe at this.The characteristics of this method are all to be surrounded by insulating pipe 61 and tube core 60 that moulding guipure 54 will twine, the guipure of moulding simultaneously 54 is also being born the effect of transporting cotton felt, making the squeeze that is subjected to around the insulating pipe 61 is uniformly, also all is isostatic for the cotton felt of each layer institute applied pressure of sending into continuously and being wrapped on the tube core 60.Its concrete working process is achieved in that the power of rolling machine C comes from the motor on the wadding machine B, promptly with shared same the motor of wadding machine B, to guarantee the synchronous operation of two guipures.Transmit by chain 43, set up clutch coupling 52(betwixt and only be used for pipe crimping), when reaching dimensional requirement, pipe crimping unsnaps, interrupt the felt that supplies of wadding machine B.In order to make rolling machine guipure 54 obtain enough working pulling forces, except main drive roller group 55, also increased an auxiliary driving roller 53 at the main transmission position.Driving chain 43 is roller rest 55 tensioners.Under the drive of major and minor live roll, guipure 54 is asking carpet veneer 56 to advance along the direction of arrow, and under the effect of guipure 54, cotton felt is connect one by a circle and encloses the land to be wrapped in and give on the tube core of placing earlier 60 through main format roll 58 and main format roll 59 backs.Abortive haul band 54 is sent through roller 59, again through deflector roll 62 and adjustment roller 65, to main drive roller 55 places, when roller 65 is used to process different tube diameters, adjusts the length of guipure.When insulating pipe 61 reaches thickness requirement, 64 pairs of insulating pipes 61 of slide unit 63 and pressure roller are extruded to shape, the roller 58 that typing will be fixed on after finishing on the Rocker arm 57 is moved from right to left along arrow, at this moment insulating pipe 61 and tube core 60 are hauled out from the working position under the effect of rocking arm 66 that is added with counterweight and counterweight roller 67, finish the processing whole process.Insulating pipe 61 diameter in winding process changes from small to big, and it is to rely on fluctuating of rocking arm 66 and counterweight roller 67 to realize that the automatic compensation of guipure length changes, and it also is to obtain by it that the squeeze size of insulating pipe in winding process adjusted.

The structure of device for board manufacture D of the present invention as shown in Figure 4, middle at the lower casing 84 that has blast inlet 80 with the upper casing 72 that has air outlet, the lower tooth wheel shaft of gear unit 67 is housed, can driving down by chain 88 and closed chain 81, guipure 83 moves along carrying roller group 82, the axle that cogs of gear unit 67, can driving upward by closed chain 75 and last pressure roller group 77, guipure 74 moves, distance between guipure can be regulated by two on the last guipure 74 adjustment screw rod group 76 up and down, and shut-off device 78 is equipped with at their rear portion.Its working process is: carried the cotton felt (gum sprayed cotton) of coming by wadding machine B, pass a bridge through the transition guipure and 39 to carry out the transition under the device for board manufacture D on the guipure 83, by chain 88 transmission of power of motor is given roller the end sprocket wheel and drive this roller and rotate together, and then by 82 rotations together of some closed chains 81 drive carrying roller groups, trailing guipure 83 is being with cotton felt to move forward together, behind the position of guipure 74, upper and lower guipure applies certain pressure to cotton felt in the arrival, continues to be fed forward.The motion of last guipure 74 relies on gear unit 67 to realize.Having driven the sprocket wheel 68 that is attached thereto after gear rotates also rotates together, sprocket wheel 68 rotates together through pressure roller group 77 on the last guipure 74 of some closed chains 75 drives, cotton felt is under the clamping of upper and lower guipure, send into the tackiness agent of forming by upper casing 72 and lower casing 84 and solidify section, by blast inlet 80 send into from the hot blast of hotblast stove under the effect of baffle plate 73, in cotton felt, come and go and pass, after the exhaust outlet discharge.The cotton felt that is cured is cut into desired size through shut-off device 78, is sent by foraminous conveyer 79.Upper and lower guipure has all adopted the dead front type steel band identical with wadding machine guipure 28, and in order to prevent laterally moving of steel band, the spy has added spacing grooved roller 71 of a pair of steel band and roller 85, and every steel band all moves in groove separately.Also be provided with oil brushing roller 69 and following oil brushing roller 86 at the left end of every group of steel band, and oil groove 87 and oil leakage bucket 70, upper and lower guipure brushed continuously execute oil, can make the unlikely and guipure adhesion in the solidified process of cotton felt, the strength that cotton felt is pressurizeed realizes by adjusting screw rod group 76 as required.

Through on probation, advantage of the present invention is obvious: (one), the present invention utilize the cotton insulation material of making of abandoned mine, have all satisfied industrial needs such as cotton felt, insulating tube, warming plate etc., have saved the mineral wool resource; (2), enhance productivity, the present invention raises the efficiency more than 10 times than manual work, and has improved product quality, improves a grade than manual product, has also improved working environment, is conducive to the producer's health; (3), equipment price of the present invention is low, the article of manufacture cost is also low, only is equivalent to 1/2nd of existing mines cotton products cost; (4), production method is easy, easy operating. In a word, the present invention is suitable for the needs of producing articles with waste mineral wool.

Claims (4)

1, a kind of device with producing articles with waste mineral wool, it is characterized in that because cotton machine A, wadding machine B, rolling machine C and device for board manufacture D constitute, opener A is by feeding part, go up cotton part, the opener part, the air-supply part, travelling screen 14 and electric motor 24 are formed, feeding part is by hopper 8, conveying belt 9, sealing curtain 10 and sprocket wheel 11 formation that links together, last cotton part is by cotton roller 5, tightening pulley, pull cotton roller 2 and flute profile guipure 12 formation that is close together, the opener part leans against stripping roller 22 by flute profile guipure 12, form on the following stripping roller 19, the air-supply part is by blast pipe 1, windsheild 3, blast inlet 4 and casing 7 constitute, travelling screen 14 is by axle 15, sprocket for main drive 16, following row's axle 17, last row's axle 18 constitutes, electric motor 24 drives sprocket for main drive 16 simultaneously through sprocket wheel 23, following stripping roller 19, sprocket wheel 11, tightening pulley 6, cotton roller 5, pull cotton roller 2, sprocket wheel 25, last stripping roller 22 rotates together, wadding machine B is by casing 27, glue spraying head 26, foraminous conveyer 28, defeated slag guipure 30, compaction part, guipure wash section and motor 44 constitute, glue spraying head 26 is fixed on the inwall of casing 27, have air suction inlet 31 on the casing 27 and draw cinder notch 33, foraminous conveyer 28 is enclosed within holder axle 29, main driving axle 42, grooved guide roller 38, guide roller 48, constitute on the grooved guide roller 51, defeated slag guipure 30 is enclosed within on main drive roller 32 and the carrying roller 29, compaction part is by rocking arm 34, roller 35, guipure 36 and roll shaft 37 constitute, the guipure wash section is by cleaning water pond 49, transmission chain 47, brush beaming roller 50 constitutes, electric motor 44 is by sprocket wheel 45, chain 43 and chain 46 drive sprocket wheel 40 respectively and main driving axle 32 rotates, driving brush beaming roller 50 by pair of sprocket through chain 47 by main driving axle 32 rotates, rolling machine C is by being sleeved on main drive roller group 55, pay main drive roller 53, main forming roller 58, main forming roller 59, deflector roll 62, moulding guipure 54 on roller 65 and the counterweight roller 67, driving removable with the chain 43 that is enclosed within on the main drive roller group 55, in a side near pair main drive roller 53, clutch coupling 52 is housed, the side that movable tube core 60 leans against main forming roller 58 and main forming roller 59 constitutes jointly, the structure of device for board manufacture D is middle with the upper casing 72 that has air outlet at the lower casing 84 that has blast inlet 80, the lower tooth wheel shaft of gear unit 67 is housed, can driving down by chain 88 and closed chain 81, guipure 83 moves along carrying roller group 82, the axle that cogs of gear unit 67, can driving upward by closed chain 75 and last pressure roller group 77, guipure 74 moves, distance between guipure can be regulated by two on the last guipure 74 adjustment screw rod group 76 up and down, and shut-off device 78 is equipped with at their rear portion.

2, a kind of method with producing articles with waste mineral wool, it is characterized in that the abandoned mine cotton is put into the hopper 8 of opener A, bring profile of tooth guipure 12 places into by conveying belt 9, by cotton roller 5, pulling cotton roller 2 is transported to the abandoned mine cotton on stripping roller 22 and the following stripping roller 19 jointly with flute profile guipure 12, continue shredding with delivering on the travelling screen 14 after the cotton shredding of abandoned mine, and send in the casing 27 of wadding machine B, in the cotton dropping process of the abandoned mine of shredding, spray into tackiness agent and drop on jointly to form on the foraminous conveyer 28 and contain the glue carpet veneer uniformly by glue spraying head 26, simultaneously, the slag ball fallen on the defeated slag guipure 30 send, owing to make casing 27 bottoms form negative pressure from the draft effect of suction opening 31, abandoned mine cotton among the opener A is promptly sent in the wadding machine B continuously, after 35 compactings of compacting lock wind roller, sent into rolling machine C inner rolling tube or send into making sheet among the device for board manufacture D.

3, according to the pipe crimping method of claim 1 and 2, it is characterized in that being an end of the carpet veneer 56 on the moulding guipure 54, be wrapped on the tube core 60, moulding guipure 54 with the rotation of main forming roller 58 and main format roll 59 with carpet veneer on tube core 60, and progressively increase thickness, when reaching thickness requirement, clutch coupling 52 is unsnaped, stop to twine, take pipe crimping.

4, according to the production method of the mineral wool panels of claim 2 and 3, it is characterized in that the power of electric motor is passed to gear unit 67, through driving up and down guipure and being transported to the cotton felt of guipure intermediary up and down, under the pressurization situation, move, the hot blast that blows through blast inlet passes cotton felt and obtains drying, being solidified into cotton plate, when the cotton plate of oven dry reached specified dimension, shut-off device cut off cotton plate and makes.

Images