CN1178498A - Roll, machine and method for forming a thin-film sheet - Google Patents
Roll, machine and method for forming a thin-film sheet Download PDFInfo
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- CN1178498A CN1178498A CN 97190067 CN97190067A CN1178498A CN 1178498 A CN1178498 A CN 1178498A CN 97190067 CN97190067 CN 97190067 CN 97190067 A CN97190067 A CN 97190067A CN 1178498 A CN1178498 A CN 1178498A
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- sheet moulding
- urceolus
- roller
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Abstract
A thin sheet forming roll includes a metallic elastic external cylinder (102) comprising a metal tube capable of elastic deformation, a shaft portion (103) for closing both ends of the metallic elastic external cylinder (102), and a cooling fluid (104) filled under an internal pressure into the metallic elastic external cylinder (102). When a melt resin from a die of an extruder is pinched between the roll and an opposite roll, that part of the metallic elastic external cylinder (102) which is pressed against the melt resin changes into a shape adapted to the outer diameter of the opposite roll, because the metal tube of the metallic elastic external cylinder (102) is elastically deformable against the pressure of the cooling fluid. Thus, a smooth thin sheet free from bank marks is formed.
Description
The present invention relates to sheet moulding roller, sheet forming machine and plate manufacturing process, it can form the thin plate with uniform outer surface fineness effectively.
Figure 18 represents to be used to form the sketch map of the sheet forming machine of thermoplastic resin board.
In Figure 18, label 11 is represented an extruder, and label 12 is represented a mould, and label 13 to 15 is represented metallic roll, and label 16 is represented a cutter.
As shown in the drawing, be directed to a plurality of metallic roll 13 to 15 from the molten resin 17 of mould 12 extruding of extruder 11.Two surfaces of molten resin 17 are oppressed by roll surface and are cooled off, and make molten resin 17 form thin plate 18.Then, thin plate 18 is cut into predetermined length by cutter 16, perhaps, if desired, is rolled by the coiler device (not shown).
As everybody knows, when the molten resin 17 from mould 12 is pressed into thin plate 18 by above-mentioned ester moulding machine, sheet moulding takes place, side slope (bank) appears in occlusal area between roller simultaneously.
Technology before using when thin plate 18 has the thickness of preparing to obtain (for example, 300 μ m or bigger) greatly, is easier to control side slope, makes its uniformity in the horizontal.The molten resin of thickness has cushioning effect, even thereby side slope inhomogeneous slightly in the horizontal, the resin of thickness also can be suppressed by roll surface on its whole width almost evenly.Therefore, can obtain smooth plate.
On the other hand, when thin plate 18 has the very little thickness that preparation is formed by rigid metal roller 13 and 14, for example, during 200 μ m, the buffering character of motlten metal 17 is then very low.Therefore, motlten metal 17 has those parts of side slope to be suppressed by the metal roll surface, does not have the compacting that the side slope part then is not subjected to the metal roll surface.Therefore, the plate face inhomogeneous unanimity of innings cloth that becomes in the horizontal.
Therefore, prior art once proposed the surface of one of metallic roll and was made by elastomeric material such as rubber, made the elastic force of elastomeric material prevent to occur the side slope feature when sheet moulding.
But, the minute surface of elastomeric material as the surface of rubber can not be made into to be similar to the metallic roll surface, thus make the surface smoothness of thin plate unsatisfactory.
Another problem is to form the transparent panel that two surfaces are necessary for minute surface.
The somebody proposes one of metallic roll for mirror roller in addition, covers a metal tube (seeing that Japan Patent discloses text No. 124425/90 and No. 100960/95) elastomeric material outside.
The purpose of such scheme is to make the resin sheet with fine surface smoothness.For this purpose, compacting under the elastic force of elastomeric material (for example rubber) layer of the molten resin of preparation formation thin plate in being placed on metal tube, thereby elasticity can adapt to the uneven gauge of molten resin.
But can cause following problems by the conventional method of using elastomeric material such as rubber to form the thin plate with satisfied fineness: elastomeric material such as rubber are heat-insulating materials, even thereby when cooling off with cooling water or analog from roller is inside and outside, the cooling effect of elastomeric material such as rubber is also minimum.On the contrary, rubber surface heating under the molten resin heat, thereby can not form gratifying plate.
The roller that is covered with metal tube outside elastomeric material also can cause following problems: the cooling effectiveness of elastomeric material is very low, thereby the outer surface of metal tube need be used water quench.
In addition, equipment size strengthens and is complicated, and cooling effectiveness is not very high, also is difficult to from the draining fully of metal tube surface.
The present invention makes in view of the above problems.The purpose of this invention is to provide a kind of being convenient to and carry out temperature control, can form sheet moulding roller, sheet moulding machine and the sheet moulding method of the thin plate that has gratifying surface smoothness for cooling.
The first sheet moulding roller of the present invention that addresses the above problem is a kind of by suppressing heat plastic resin between at least two rollers, simultaneously to its cooling and the sheet moulding roller of shaping thin plate.This sheet moulding roller comprises a metallic elastic urceolus that is made of the metal tube of elastically deformable, and the axial region that is used for closed metal elasticity urceolus two ends.
According to the above-mentioned first sheet moulding roller, use the compacting of sheet moulding roller from the molten resin of extruder mold with urceolus that the metal tube by elastically deformable constitutes.When the molten resin pressurized, the metallic elastic urceolus becomes and is adapted to the shape of molten resin as the uneven gauge that exists, and this is the reason owing to the metal tube elastically deformable of urceolus.When such change shape, the metallic elastic urceolus is pressed on the motlten metal, thereby can form the uniform thin plate of the surface smoothness that does not have the side slope feature.
The second sheet moulding roller of the present invention be a kind of between at least two rollers the suppressing heat plastic resin simultaneously to its cooling and the sheet moulding roller of shaping thin plate.This sheet moulding roller comprises the metallic elastic urceolus that is made of the elastically deformable metal tube, the axial region that is used for closed metal elasticity urceolus two ends, and the resilient roller that is located at interior elastically deformable of metallic elastic urceolus and rotation.
According to the above-mentioned second sheet moulding roller, use from the molten resin of extruder mold to have the metallic elastic urceolus that constitutes by metal tube that can strain and the sheet moulding roller that is located at rotating resilient roller in the urceolus is suppressed.When the molten resin pressurized because the resilient roller elastically deformable in the metal tube of urceolus and the urceolus, if thereby the metallic elastic urceolus become the shape that is adapted to the uneven gauge that molten resin exists.When such change shape, the metallic elastic urceolus is pressed on the molten resin, thereby can form the thin plate that does not have the surface smoothness of side slope feature uniformity.
The 3rd sheet moulding roller of the present invention be the first or second sheet moulding roller the axial region periphery be provided with can strain lip ring, its be engaged in the metal outer cylinder with the watertight state and axial region on.
By above-mentioned lip ring is set, metallic elastic urceolus two ends can be out of shape owing to lip ring.Comprise two ends axially on, the uniformity that becomes of the deflection on whole roll surface.Therefore can form the better thin plate of surface smoothness.
The 4th sheet moulding roller of the present invention is any sheet moulding roller in the first to the 3rd, and it comprises a cooling fluid pressurized delivered device, and it is used for cooling fluid is sent into the metallic elastic urceolus by axial region under pressure.
By above-mentioned cooling fluid pressurized delivered device is set, predetermined internal pressure can be delivered to the metallic elastic urceolus, can improve cooling effectiveness, and can carry out in the suitable cooling that needs under the temperature.
The the of the present invention the 5th and the 6th sheet moulding roller is any in the first to fourth sheet moulding roller, and wherein, the metallic elastic urceolus has the jointless structure that does not have weld seam.
Jointless structure can form a kind of gratifying thin plate, and it is not delivered to the weld seam on it in the compacting molten resin.
The 7th sheet moulding roller of the present invention is any in first to the 6th sheet moulding roller, and wherein, the metallic elastic urceolus comprises at least two metal tubes that are combined together.
By the metal tube body plan metallic elastic urceolus that is combined together by at least two, the thickness of every pipe can reduce, thereby prolongs the life-span when having repeated deformation.
The 8th sheet moulding roller of the present invention is the first sheet moulding roller, and it comprises the inner core of an external diameter less than the urceolus internal diameter, thereby cooling fluid injects the space between inner core and the urceolus under pressure.
By above-mentioned inner core is set, under pressure, cooling fluid injected the space between urceolus and the inner core, as long as and to make cooling fluid flow into inner core inner, need not to be provided with the above-mentioned cooling fluid pressurized delivered device ad hoc to apply internal pressure in the roller outside.
The 9th sheet moulding roller of the present invention is the 8th sheet moulding roller, and it comprises a cooling fluid conveying device, and it is used for cooling fluid is sent into inner core.
By the cooling fluid conveying device is set, need not to apply high pressure and just can carry cooling fluid by independent pipeline.
The first sheet moulding machine of the present invention is a kind of thermoplastic resin sheet forming machine, it is used for and will guides at least two metallic roll from the molten resin of extruder mold extruding, two surfaces of compacting motlten metal between roll surface, cool off molten resin simultaneously, so that formation thin plate, wherein, at least one metallic roll is any in first to the 9th sheet moulding roller.
According to the invention described above sheet moulding machine, the molten resin that pushes from extruder mold guides between a metallic elastic urceolus and a metallic roll, but described metallic elastic urceolus comprises the metal tube of bullet distortion, is marked with cooling fluid in it and has the character of automatic recovery.Then, molten resin is pressurized between metallic elastic urceolus and metallic roll, cools off simultaneously, so that form the thin plate with gratifying surface smoothness.
The second sheet moulding machine of the present invention is in the first sheet moulding machine, and any in first to the 9th sheet moulding roller is longer than relative metallic roll in the axial direction.
Because said structure, on whole forming rolls,, thereby make resin sheet have high surface smoothness to the pressing pressure of the molten resin more uniformity that becomes.
The 3rd sheet moulding machine of the present invention is in above-mentioned sheet moulding machine, and sheet moulding roller and relative metallic roll are driven by a kind of drive unit, so that suppress molten resin betwixt.
With compare by dragging of relative metallic roll, the molten resin that is undertaken by sheet moulding roller and relative metallic roll is compressed on the part that contacts with molten resin and with between the part that molten resin contacts does not cause and less reverse or be out of shape.Therefore, use thin metallic elastic urceolus can form the stabilized resins thin plate.
Sheet moulding method of the present invention comprises and will introduce first to the 9th sheet moulding roller occlusal area between any and the metallic roll from the molten resin of extruder mold extruding, between sheet moulding roller and metallic roll, suppress molten resin, cooling simultaneously is to form the thin plate of minute surface.
Brief Description Of Drawings is as follows:
Fig. 1 is the schematic sectional view of the sheet moulding roller of first embodiment of the invention;
Fig. 2 is the schematic diagram of the sheet moulding relevant with first embodiment of the invention;
The schematic of Fig. 3 is shown in the compacting state in the sheet moulding relevant with first embodiment of the invention;
Fig. 4 is the schematic sectional view of the sheet moulding roller of second embodiment of the invention;
Fig. 5 is the schematic sectional view of the sheet moulding roller of third embodiment of the invention;
Fig. 6 is the schematic sectional view of the sheet moulding roller of fourth embodiment of the invention;
Fig. 7 is the schematic sectional view of the sheet moulding roller of fifth embodiment of the invention;
Fig. 8 is the schematic sectional view of the sheet moulding roller of sixth embodiment of the invention;
Fig. 9 is the schematic diagram that the sheet moulding roller of the axial elongation of seventh embodiment of the invention contacts with a metallic roll;
Figure 10 represents the surface pressure distribution of sheet moulding roller of the present invention;
Figure 11 is the schematic sectional view of the sheet moulding roller of eighth embodiment of the invention;
The schematic of Figure 12 is shown in the compacting state in the sheet moulding relevant with eighth embodiment of the invention;
The schematic diagram of Figure 13 is represented the sheet moulding state relevant with eighth embodiment of the invention;
The schematic diagram of Figure 14 is represented the sheet moulding state relevant with ninth embodiment of the invention;
Figure 15 is the schematic sectional view of the sheet moulding roller relevant with first example of the present invention;
Figure 16 is the schematic sectional view of the sheet moulding roller relevant with the present invention's second example;
Figure 17 is another schematic sectional view of the sheet moulding roller relevant with second embodiment of the invention; And
Figure 18 is the schematic sectional view of sheet moulding machine.
The contrast accompanying drawing is described embodiments of the invention now.(first embodiment)
Fig. 1 is the schematic diagram that is used in the sheet moulding roller relevant with first embodiment of the invention in the sheet moulding machine shown in Figure 180.
As shown in Figure 1, the sheet moulding roller 101 relevant with the present invention (sheet moulding roller hereinafter referred to as) comprises thick a metallic elastic urceolus 102 that is enough to strain, an axial region 103 that is used for closed metal elasticity urceolus 102, and cooling fluid pressurized delivered device (not shown), it is used for cooling fluid 104 pressurized delivered of introducing from the outside by the axial region 103 of metallic elastic urceolus 102 are gone into urceolus 102, so that give urceolus 102 1 predetermined pressure.
Fig. 2 represents to use the sketch map of a shaped portion of the forming rolls relevant with the present invention.
In Fig. 2, be similar to conventional roll, the metallic roll 105 with smooth surface is oppositely arranged with sheet moulding roller 101.Metallic roll 105 and sheet moulding roller 101 will be pressed into thin plate 18 from the molten resin 17 of mould 12.
In the illustrated embodiment, relative roller 101,105 is that the present invention is not limited thereto for example, and two or more rollers (for example three rollers that are provided with as shown in Figure 18) can be set.
According to the present invention, as illustrated in fig. 1 and 2, when using 101 compactings of sheet moulding roller from the molten resin 17 of extrusion die 12, the elastic part of metallic elastic urceolus 102 is pressed on the molten resin 17, and is adapted to the shape of molten resin 17 and changes shape.In this deformation state, molten resin 17 (see figure 3) that under pressure, contacts with elastic part.
Therefore, can not resemble and in sheet moulding, produce side slope the sort of ordinary elasticity roller that for example rubber is made.In addition, the surface of metallic elastic urceolus 102 is minute surfaces, and cooling internally effectively.Therefore, can easily form the thin plate 18 of highly transparent efficiently.
In sheet moulding roller 101 of the present invention, preferably be approximately 0.1 to 1.5mm as the thickness of the metal tube of the elastically deformable of metallic elastic urceolus 102.
If the thickness of metal tube is less than 0.1mm, the intensity of its tolerance internal pressure will be not enough.On the other hand, if this thickness greater than 1.5mm, so, the degree of strain will be too low when metal tube responded the scrambling on molten resin surface neatly in the sheet moulding process.
The material of metal tube does not have any restriction, but the example of recommending is spring steel, stainless steel and nickel.
When metallic elastic urceolus 102 is provided with weldless jointless structure, can form gratifying thin plate, it is the weld seam of transfer printing on it when the compacting molten resin not.
When metallic elastic urceolus 102 was made of at least two metal tubes that are combined together, the thickness of each metal tube can reduce, thus can be when having repeated deformation life-saving.
Figure 10 is the schematic diagram of an expression design, and its expression is according to the surface pressure distribution of above-mentioned sheet moulding roller of the present invention.
As shown in figure 10, introducing inner water, cooling fluid 104 gives the metallic elastic urceolus 102 1 predetermined pressure.
In sheet moulding roller 101 of the present invention, the metal tube of metallic elastic urceolus 102 is elastically deformables, is subjected to fluid pressure.Therefore, the surface pressure distribution figure of roller 101 almost is uniform from the contact starting point to contacting end point.
Therefore, the scope that roller 101 can be pressed on the molten resin under predetermined surface pressing is extended, thereby the fineness that makes resin sheet surface uniformity more.
Can easily form resin sheet highly bright and clean, highly transparent according to sheet moulding roller 101 of the present invention, its thickness can be from being as thin as 200 μ m or thinner up to the thick 300 μ m or thicker that reach.
The cooling of the metallic elastic urceolus of sheet moulding roller of the present invention is carried out as cooling water internally by circulating cooling fluid 104.
That is to say that the urceolus of sheet moulding roller is a metal, the conductivity of heat height, this helps internally it being cooled off with cooling fluid 104.Therefore, the outer surface of the surface of metallic elastic urceolus, sheet moulding roller can always remain on the predetermined temperature.Even in the process of continued operation, the sheet moulding roller also can form gratifying thin plate, and does not reduce cooling effectiveness and cooling effect, does not also reduce quality and productivity ratio.
When using traditional rubber rollers, employed material behavior is the elastic force of rubber, and therefore, when the surface pressing that prepare to change on thin plate, roller need be changed by the roller of other different material of surface pressing.In situation of the present invention, the cooling fluid supply pressure is that predetermined amounts changes, thereby the surface pressing on thin plate is changed, and has removed the sort of roll change burden that resembles when using conventional roll.
In the present invention, cooling fluid can be cooling agent such as water or the oil of using always.
For example, cooling fluid 104 is to be undertaken by supply orifice 103a by being arranged on outside cooling fluid pressurized delivered device (not shown) to the supply of inside, and this hole is axially to be drilled in the axle center of axial region 103.
With the cooling fluid cooling is to carry out under predetermined pressure.Therefore, in the present invention, the metallic elastic urceolus 102 of sheet moulding roller 101 is under the watertight state with the part that is arranged on the axial region 103 at metallic elastic urceolus 102 two ends.
In the embodiment shown in fig. 1, O shape circle 106 is located on the circumference of axial region 103, and the axial region 103 that has an O shape circle 106 is assemblied in the metallic elastic urceolus 102 so that sealing, thereby keeps the watertight state.
In the present embodiment, sheet moulding roller 101 is normally dragged by relative metallic roll 105, and molten resin 17 is suppressed between these two rollers.Perhaps, axial region 103 can be driven individually, thereby makes sheet moulding roller 101 according to the rotational speed identical with relative metallic roll 105, thereby makes molten resin 17 pressurized between roller.
Therefore, compare with the situation that drags by relative metallic roll 105, this by drag separately sheet moulding roller 101 and relatively the situation of metallic roll 105 compacting molten resins at the part that contacts with molten resin with between the part that molten resin contacts do not cause at sheet moulding roller 101 two ends and little reverse or be out of shape.Therefore, the thickness of metallic elastic urceolus 102 can further reduce, and internal pressure need not very high.Formation resin sheet that can be more stable also prolongs life-span of sheet moulding roller 101.
As for drive unit, sheet moulding roller 101 can be driven by independent drive unit, perhaps can drive by the drive unit of drive transmission by one.The rotating speed of metallic roll 105 and sheet moulding roller 101 can suitably be regulated, and two rollers are rotated with peripheral speed much at one.(second embodiment)
Contrast Fig. 4 describes the second embodiment of the present invention now.
In the present embodiment, as shown in Figure 4, between axial region 103 and metallic elastic urceolus 102, use the seal 107 of an elastically deformable, thereby guarantee water-stop by conical surface 103b and the 107a that on axial region 103 and seal 107, forms respectively.
Roller shown in Figure 4 uses lip ring 107 to replace the O shape circle 106 of roller shown in Figure 1.Therefore, the distortion at metallic elastic urceolus 102 two ends is allowed by seal 107.Deflection becomes evenly in the axial direction, comprises the both ends of metal outer cylinder 102, therefore, can form the thin plate with better surface smoothness.
The lip ring 107 of elastically deformable can be any material that can keep the watertight state and allow the urceolus distortion, and the example is EPDM (EP rubbers) and neoprene.(the 3rd embodiment)
Contrast Fig. 5 describes the third embodiment of the present invention now.
In the present embodiment, as shown in Figure 5, a fixture 108 comprises the pressing accessory 108b of fixture shown in Fig. 4 108, and a circumference pressures partially 108c, and it depresses the circumference of metallic elastic urceolus 102 every ends.
Because the circumference of metallic elastic urceolus 102 every ends is depressed, thereby metallic elastic urceolus 102 will never be subjected to displacement.(the 4th embodiment)
Contrast Fig. 6 describes the fourth embodiment of the present invention now.
In the present embodiment, as shown in Figure 6, be provided with an inner core 109 in metallic elastic urceolus 102, its external diameter is less than the internal diameter of urceolus.Cooling fluid 104 injects the space between inner core 109 and the urceolus 102 under internal pressure.In inner core 109, cooling fluid 104a sends into from the outside by path 10 3a.Therefore, special cooling fluid pressurized delivered device needn't externally be set.
Therefore, inner core 109 is inner only by the coolant supply cooling that separates.Inner core 109 is made of metal, and thermal conductivity is good.Different with last embodiment, need not to apply high pressure, just be enough to carry cooling fluid.(the 5th embodiment)
Contrast Fig. 7 describes the fifth embodiment of the present invention now.
In the present embodiment, as shown in Figure 7, fluid injects the space between urceolus 102 and the inner core 109 under internal pressure.Fluid 104b is sent into this space by the path 10 3c that is located in the axial region by the external pressurized conveying device.
When preparing the internal pressure that reaches predetermined, even in manipulation process, also can change internal fluid pressure by path 10 3c.(the 6th embodiment)
Contrast Fig. 8 describes the sixth embodiment of the present invention now.
In the present embodiment, as shown in Figure 8, internal pressure needn't change in operating process.In the sidewall of axial region 103, form path 10 3d fluid 104d before operation and carry, so open seal channel 103d in internal pressurization.In this manner, compare with embodiment illustrated in fig. 7, can simplified structure.(the 7th embodiment)
Contrast Fig. 9 describes the seventh embodiment of the present invention now.
In the present embodiment, as shown in Figure 9, between a sheet moulding roller 201 and a common relative metallic roll 105, be pressed from two surfaces of the molten resin 17 of the mould of extruder extruding.In the axial direction, sheet moulding roller 201 is grown than metallic roll 105, thereby molten resin 17 is incited somebody to action not pressurized in the end of the axle of two rollers.
Because this structure can become more even at the pressing pressure on the molten resin 17, thereby make resin sheet have high surface smoothness on whole forming rolls 201.
In the embodiment shown in fig. 9, can use sheet moulding roller 101 as shown in Figure 5, it uses a fixture 108 that comprises the circumference pressures partially 108c that depresses metallic elastic urceolus 102 every end circumference.This use even in operation, also can guarantee the watertight state when having displacement.(the 8th embodiment)
Contrast Figure 11 describes the eighth embodiment of the present invention now.
Figure 11 is used in the sheet moulding machine shown in Figure 180, the schematic diagram of the sheet moulding roller relevant with eighth embodiment of the invention.
As shown in figure 11, the sheet moulding roller relevant with present embodiment has a resilient roller 111, and it is arranged in the metallic elastic urceolus 102 that resembles the sort of sheet moulding roller of first embodiment shown in Figure 1.
That is to say, sheet moulding roller 101 of the present invention comprises thick a metallic elastic urceolus 102 that is enough to take place strain, an axial region 103 that is used for closed metal elasticity urceolus 102 two ends, be arranged on axial region 103 circumference can strain lip ring 110, one can strain and rotation, be located at the resilient roller 111 in the metallic elastic urceolus 102, and a coolant supply (not shown), it is used for fluid 104 being sent into the space that limits between resilient roller 111 and the metallic elastic urceolus 102 by the axial region 103 of metallic elastic urceolus 102.
According to the present invention, as shown in figure 12, when using 101 compactings of sheet moulding roller from the molten resin 17 of extrusion die 12, roller 101 carries out following actions: metallic elastic urceolus 102 and resilient roller 111 are pressed on the molten resin, when exerting pressure, become the shape that is adapted to molten resin 17 shapes thereon.
At this moment, as shown in figure 13, metallic roll 105 and sheet moulding roller 101 are pressed on the molten resin 17 in molten resin interlock contact zone 115.Except molten resin interlock contact zone 115, on the circumferencial direction of sheet moulding roller 101, owing to flow in the space of cooling fluid 104 between metallic elastic urceolus 102 and resilient roller 111, metallic elastic urceolus 102 is effectively cooled off.At this moment, resilient roller 111 is rotated with identical peripheral speed with metallic elastic urceolus 102 together in trailing mode.But the rotating speed of resilient roller 111 is higher than the rotating speed of metallic elastic urceolus 102.
The sheet moulding roller 101 relevant with present embodiment has the inner resilient roller 111 that is provided with, thereby when by resilient roller 111 compressing molten resins 17, keeps press power on relative metallic roll 105.Therefore, different with the sheet moulding roller of aforementioned first embodiment, fluid can be only mobile for cooling purpose, thereby can further reduce pressure.
Therefore, the cooling fluid pressurized delivered device of internal pressure needn't be externally be provided for applying, thereby the manufacturing cost of sheet moulding roller can be reduced.
As the ordinary elasticity roller that uses rubber for example to make, the sheet moulding roller of present embodiment the side slope feature can not occur yet in the process of shaping thin plate.In addition, the surface of metallic elastic urceolus 102 is minute surfaces and can carries out the inside cooling effectively.Therefore, can be easily and form thin plate 18 effectively with best bright finish and transparency.
The urceolus of sheet moulding roller 101 does not preferably have the jointless structure of weld seam.
The elastomeric material 114 of resilient roller 111 is not limited to a kind of specific material, and the example of its material is EPDM (EP rubbers), neoprene and silicon rubber.The hardness of elastomeric material 114 is preferably 30 ° to 90 ° according to rubber hardness.
According to sheet moulding roller of the present invention, can form resin sheet very bright and clean, the high grade of transparency, its thickness range is from being as thin as 200 μ m or thinner until the thick 400 μ m or thicker that reach.
In the present embodiment, shown in the partial enlarged drawing of Figure 11, metallic elastic urceolus 102 comprises two or more metal material pipes that are assembled together (in the present embodiment, three pipes are assembled together).Compare with the situation of a pipe with same thickness, this compound tube has the bending strength that is approximately 1/3rd reduction, thereby has prolonged the life-span of metallic elastic urceolus 102 in having the situation of repeated deformation.In this case, the thickness of each pipe can be identical, also can be different.(the 9th embodiment)
Contrast Figure 14 describes the ninth embodiment of the present invention now.
In the present embodiment, as shown in figure 14, the resilient roller 111 that is located in the metallic elastic urceolus 102 in the 8th embodiment is setovered towards relative metallic roll 105.Therefore, compare with the 8th embodiment, when molten resin 17 was pressed, the press power on relative metallic roll 105 was kept by resilient roller 111, burden not on the seal at the two ends of metallic elastic urceolus 102.Therefore, on metallic elastic urceolus 102, do not bear, and can simplify the sealing mechanism at its two ends, so just can reduce the manufacturing cost of sheet moulding roller.
As mentioned above, use sheet moulding roller 101 of the present invention, can easily form thin plate with uniform outer surface fineness.In addition, according to the present invention, on the surface of the metallic elastic urceolus 102 of sheet moulding roller 101, can be provided with irregularly shaped, thereby on the surface of thin plate, can form any decorative pattern.
Be used for keeping other enforcement of watertight state to fall, metallic elastic urceolus 102 and axial region 103 can combine by means such as welding.Example
The contrast accompanying drawing is described preferred embodiment of the present invention now, and still, the present invention is not restricted to these examples.(first example)
Figure 15 represents the sketch map with sheet moulding roller of the present invention.In Figure 15, label 101 is represented the sheet moulding roller, and label 102 is represented the metallic elastic urceolus, label 103 is represented axial region, and label 104 is represented cooling fluid, and label 110 is represented elastic sealing element, label 121 is represented first change, label 122 is represented second change, and label 123 is represented journal bearing, and label 124 is represented thrust bearing, label 125 is represented second journal bearing, rotary seal is shown in label 126 representatives, and label 127 is represented pressurizing nut, and label 128 is represented last item spare.
As shown in figure 15, metallic elastic urceolus 102 and elastic sealing element 110 usefulness adhesives are glued together.The elastic sealing element 110 and first change 121 be at water, that is, under the hydraulic pressure of cooling fluid from movable sealing.
Even under the rotating speed of axial region 103, when the peripheral speed of relative metallic roll 105 and the peripheral speed of metallic elastic urceolus 102 were not quite identical, metallic elastic urceolus 102, elastic sealing element 110 and first change 121 were also integrally rotated and are not produced any nonconforming power.
There is small difference at the external diameter of metallic elastic urceolus 102 with between the internal diameter of the mating part of second change 122 of periphery compressing urceolus end.Therefore, between the metallic elastic urceolus 102 and second change 122, cause speed discrepancy.But second change 122 is free to rotate by the journal bearing 125 that is arranged on last item spare 128 peripheries.Therefore, second change 122 can be rotated independently, not effect power backward on metallic elastic urceolus 102.
HOPP MER 0.8 (molding condition)
240 ℃ of mold temperatures (metallic elastic urceolus specification)
External diameter 300mm
Length 1,200mm
Sheet thicknesses 0.4mm
18 ℃ of cooling water temperatures (inlet)
Cooling water pressure 5kg/cm
2G
Resulting thin plate is a kind of film, but does not have the sort of side slope feature in the conventional art, is a kind of minute surface thin plate with the sort of gratifying fineness of common slab.(second example)
Figure 16 and 17 is sketch maps of the sheet moulding roller relevant with the present invention.
In Figure 16 and 17, label 101 is represented the sheet moulding roller, and label 102 is represented the metallic elastic urceolus, label 103 is represented axial region, and label 104 is represented cooling fluid, and label 110 is represented elastic sealing element, label 111 is represented resilient roller, label 131 is represented change, and label 132 is represented journal bearing, and label 133 is represented thrust bearing, label 114 is represented rotary seal, label 135 is represented pressurizing nut, and label 137 is represented journal bearing, and label 138 is represented rotary seal.
Shown in Figure 16 and 17, metallic elastic urceolus 102 and elastic sealing element 110 usefulness adhesives are glued together.Elastic sealing element 110 and change 131 are from movable sealing at water under the hydraulic pressure of fluid.
The internal diameter of the external diameter of resilient roller 111 and metallic elastic urceolus 102 guarantees to be in contact with one another in a zone.Therefore, when sheet moulding roller 101 during at this areal pressure contacting metal roller 105, metallic elastic urceolus 102 is hardly at reverse top offset.
In this example, resilient roller 111 is eccentric with respect to axial region 103, thereby axial region 103 does not rotate.
HOPP MER 0.9 (molding condition)
Mold temperature: 235 ℃ (metallic elastic urceolus specification)
External diameter: 315mm
Length: 1,200mm
Sheet thicknesses: 0.2mm
Cooling water temperature (inlet): 18 ℃
Cooling water pressure: 2kg/cm
2G
Resulting thin plate is a kind of film, but does not resemble the sort of side slope feature of the prior art, and is to have the minute surface thin plate that resembles the sort of gratifying fineness of common slab.In addition, water flows as long as be used for cooling under low hydraulic pressure.Therefore, externally need not to be provided for applying the cooling fluid pressurized delivered device of internal pressure.Therefore, can successfully realize reducing the manufacturing cost of sheet moulding roller.
According to the present invention, molten resin is to use sheet moulding roll-in system with the urceolus that comprises metal tube that can strain.When the compacting molten resin, metal tube is partly resisted the pressure strain of cooling fluid.Therefore, the urceolus of pressure contact molten resin changes over the shape of the external diameter that accords with opposed roller.When such change shape, urceolus is pressed on the molten resin.Therefore, this sheet moulding roller is suitable for being shaped does not have the bright and clean of side slope feature, the thin plate of minute surface.
In addition, be to use sheet moulding roller from the molten resin of extruder mold and be arranged on the resilient roller compacting that to rotate in the urceolus with the urceolus that comprises metal tube that can strain.When the compacting molten resin, because the metal tube and the resilient roller elastically deformable of urceolus, thereby the metallic elastic urceolus is adapted to the uneven gauge change shape that molten resin may exist.When such distortion, the metallic elastic urceolus is pressed on the molten resin.Therefore, this sheet moulding roller is suitable for forming the even thin plate of any surface finish that does not have the side slope feature.
Claims (13)
1. sheet moulding roller, it is by suppressing heat plastic resin between at least two rollers, simultaneously to its cooling to form thin plate, described sheet moulding roller comprises:
A metallic elastic urceolus, it comprise one can strain metal tube, and axial region that is used for closed metal elasticity urceolus two ends.
2. sheet moulding roller, it is by suppressing heat plastic resin between at least two rollers, simultaneously to its cooling to form thin plate, described sheet moulding roller comprises:
Metallic elastic urceolus that comprises metal tube that can strain, axial region that is used for closed metal elasticity urceolus two ends and one can strain and rotation be arranged on resilient roller in the metallic elastic urceolus.
3. sheet moulding roller according to claim 1 and 2 is characterized in that: on the periphery of described axial region, be provided with can strain lip ring, thereby be assemblied in the watertight state in the two ends of metallic elastic urceolus and on the described axial region.
4. according to each described sheet moulding roller in the claim 1 to 3, it is characterized in that: it comprises cooling fluid pressurized delivered device, and it is used for by described axial region cooling fluid being sent in the metallic elastic urceolus.
5. according to each described sheet moulding roller in the claim 1 to 4, it is characterized in that: described metallic elastic urceolus has the jointless structure that does not have weld seam.
6. sheet moulding roller according to claim 5 is characterized in that: described metallic elastic urceolus is produced by electrical forming, has jointless structure.
7. according to each described sheet moulding roller in the claim 1 to 6, it is characterized in that: described metallic elastic urceolus comprises at least two metal tubes that are assembled together.
8. sheet moulding roller according to claim 1 is characterized in that: it comprises the inner core of an external diameter less than the urceolus internal diameter, thereby cooling fluid injects the space between inner core and the urceolus under internal pressure.
9. sheet moulding roller according to claim 8 is characterized in that: it comprises the cooling fluid conveying device that is used for cooling fluid is sent into inner core.
10. sheet moulding machine, it is used at least two metallic roll of molten resin guiding that will extrude from extruder mold, and between the surface of roller two surfaces of compacting molten resin, cool off molten resin simultaneously; Wherein:
In the described metallic roll at least one is according to each described sheet moulding roller in the claim 1 to 9.
11. sheet moulding machine according to claim 10 is characterized in that: the sheet moulding roller of claim 1 metallic roll than relative in the axial direction is long.
12. according to claim 10 or 11 described sheet moulding machines, it is characterized in that: described sheet moulding roller is driven by drive unit with relative metallic roll, so that suppress molten resin betwixt, simultaneously to its cooling, to form the thin plate of minute surface.
13. a sheet moulding method, it comprises:
To lead according to the occlusal area between each a described sheet moulding roller and the metallic roll the claim 1 to 9 from the motlten metal that the mould of extruder is extruded, and
Between sheet moulding roller and metallic roll, suppress molten resin, simultaneously to the thin plate of its cooling with the formation minute surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97190067 CN1178498A (en) | 1996-02-09 | 1997-01-17 | Roll, machine and method for forming a thin-film sheet |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23586/96 | 1996-02-09 | ||
| CN 97190067 CN1178498A (en) | 1996-02-09 | 1997-01-17 | Roll, machine and method for forming a thin-film sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1178498A true CN1178498A (en) | 1998-04-08 |
Family
ID=5178615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97190067 Pending CN1178498A (en) | 1996-02-09 | 1997-01-17 | Roll, machine and method for forming a thin-film sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1178498A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100546800C (en) * | 2005-12-27 | 2009-10-07 | 东芝机械株式会社 | Thin slice or film form roll, thin slice or film former and the control method that arches upward |
| CN101472725B (en) * | 2006-04-19 | 2011-09-28 | 富士胶片株式会社 | Cellulosic resin film and process for producing the same |
| CN102785346A (en) * | 2011-05-20 | 2012-11-21 | 株式会社日本制钢所 | Roller for sheet forming and sheet forming method |
-
1997
- 1997-01-17 CN CN 97190067 patent/CN1178498A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100546800C (en) * | 2005-12-27 | 2009-10-07 | 东芝机械株式会社 | Thin slice or film form roll, thin slice or film former and the control method that arches upward |
| CN101472725B (en) * | 2006-04-19 | 2011-09-28 | 富士胶片株式会社 | Cellulosic resin film and process for producing the same |
| CN102785346A (en) * | 2011-05-20 | 2012-11-21 | 株式会社日本制钢所 | Roller for sheet forming and sheet forming method |
| CN102785346B (en) * | 2011-05-20 | 2016-03-16 | 株式会社日本制钢所 | Sheet shaping roller and sheet manufacturing process |
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