CN104507651B - There is the extrusion die of flexure plane - Google Patents

Abstract

The invention provides the flow device of main body including being arranged in extrusion equipment.Described main body is along planes bound, and has the first side and the second side.Second side is positioned opposite with the first side.Flow device also includes first formed on the first side and forms second on the second side.Described main body has the thickness being limited between first and second.Between the first side and the second side, main body defines multiple guide hole.Additionally, at least one of first or second is formed from the outward extending curvature of plane.

Description

There is the extrusion die of flexure plane

Cross reference to related applications

The application is according to 35 U.S.C. § 120, it is desirable to the US application serial that on May 29th, 2012 submits to The priority of the 13/482nd, No. 408, herein based on this application and by the most incorporated herein by reference for its full text.

Technical field

The present invention relates to extrusion die, in particular it relates to have the extrusion die of flexure plane.

Background

Expressing technique can create the object with complex section.In common process, batch material is inserted and squeezes Go out in the room of machine barrel.Once be positioned in room, by pressure mechanism (such as, pump, piston, screw rod or its His usual manner) material is pressurizeed.Indoor pressure must be sufficiently high, to overcome material for flowing Resistance, this resistance be by be arranged in indoor die head produce.Once overcome the resistance for flowing, Pressure forces material to arrive die head from the entrance of extruder barrel.Material can by be limited to entrance and die head it Between whole passage in arrange plate in limit opening or passage.Along with material arrives die head, it is squeezed Go out by one or more guide holes being limited in die head and drain tank, to be formed, there is required geometry Extrudate (such as, honeycomb ceramics).

Regular die is designed to produce required form (such as, the profile of honeycomb ceramics and the duct formula of extrudate Sample), but to this end, die head also must tolerate the interior extreme pressure produced of extruder chamber.Form such as thin-walled honeybee Thin drain tank needed for nest body requires the high pressure in extruder chamber.If designing incorrect, may be by from pressure The plate benging of power causes die head deformation or ruptures.Therefore, the thickness of die head is generally increased with the indoor foundation of tolerance High pressure.This is also identical for may be arranged at other elements of the restrictive opening of indoor.By In for any plate bending problem, along with the increase of board diameter, plate thickness also must increase, to meet material Yield limit.Therefore, along with the increase of die head thickness, flow through the impedance of opening in die head and resistance not Desirably increase.

Accordingly, there exist the demand for the die head improved, the die head of this improvement reduces flowing by die head Impedance and resistance.Also want to increase the production capacity of expressing technique, reduce the stress being applied on die head simultaneously.

General introduction

In an exemplary embodiment of the present invention, installation plate in extrusion equipment.Described plate includes edge The main body of planes bound, and there is the first side and the second side.Second side is positioned opposite with the first side.Described Plate also includes first formed on the first side and forms second on the second side.Described main body has It is limited to the thickness between first and second.Between the first side and the second side, define in main body Multiple openings.Additionally, at least one of first or second is formed from the outward extending curvature of plane.

An aspect preferably, the plurality of opening can be parallel to each other respectively be limited to the first side and Between second side.Extend additionally, the plurality of opening can be basically perpendicular to plane respectively.In yet another aspect, Described curvature can be oval, cone, torispherical or hemispherical.

In yet another aspect, described plate can include first area, second area and the 3rd region.First area Can be limited to the center near main body, and have and be perpendicular to the substantially invariable thickness of in-plane.Secondth district Territory can be limited to the edge near main body, and is suitable to be connected with extrusion equipment.3rd region can be limited to first Between region and second area.First area can include the first radial thickness and the second radial thickness, Qi Zhong One radial thickness is limited to the center near first area and the second radial thickness is limited near the 3rd region. First radial thickness can be more than the second radial thickness.

In another embodiment, it is provided that extrusion equipment is used for forming extrudate.Equipment can include cylinder, institute State cylinder, in its one end, there is entrance, in opposite end, there is outlet.Cylinder defines between entrance side and outlet side Room.Pressure mechanism is disposed adjacent to the entrance of cylinder, for being pressurizeed in room, and be arranged so that material from Entrance moves to outlet.Defining flow path between indoor entrance and exit, this flow path limits Flow direction.Described equipment also includes the die head that the outlet with cylinder is connected.Described die head can include main body, Entrance side and outlet side, described main body is along the planes bound being basically perpendicular to flow direction.The thickness of main body It is limited between entrance side and outlet side.Die head may also include be limited between entrance side and outlet side multiple Guide hole, the plurality of guide hole is suitable to receive material and at outlet side extruded material at entrance side.Additionally, at least The entrance side of a part or outlet side are formed from the outward extending curvature of plane.

An aspect preferably, the plurality of guide hole is substantially parallel to one another.The plurality of guide hole is also Can be limited in main body substantially along flow direction.In yet another aspect, described curvature can be oval, Cone, torispherical or hemispherical.In yet another aspect, described die head can include first area, second Region and the 3rd region.First area can be limited to the center near main body, and has at flow direction basic Constant thickness.Second area can be limited to the edge near main body, and is connected with extrusion equipment.3rd district Territory can be limited between first area and second area.Additionally, first area can include maximum radial thickness and Smallest radial thickness, described maximum radial thickness is essentially defined in the flowing side at the center near first area It is limited near first and the 3rd interface in region to, described smallest radial thickness.The plurality of guide hole can limit Determine in the first region.

In a related aspect, extrusion equipment can include being arranged in homogenizing between indoor entrance and die head Device.Described homogenizer can include interior part and outer portion.Outer portion can be connected with cylinder, and described interior part The first side towards entrance and second side positioned opposite with described first side can be included.Multiple openings can limit In interior part between the first side and the second side, and it is basically parallel to flow direction.First side and second At least one had bending sections of side.Or, the first side and the second side all can have bending sections.

Extrusion equipment may also include the plate between the entrance and the die head that are arranged in indoor.Described plate can have and cylinder The outer portion being connected and the interior part comprising Web materials.Described interior part can have at least one bending Face.Or, described interior part can have the first flexure plane and the second flexure plane, wherein said first flexure plane Towards entrance, the second flexure plane is towards die head.

In a different embodiment, it is provided that for the method forming extrudate in extrusion equipment.Institute State extrusion equipment and can include cylinder (described cylinder has entrance in its one end, has outlet in opposite end), limit The room between entrance and exit in cylinder, be disposed adjacent to cylinder entrance pressure mechanism, and with cylinder The die head that outlet is connected, described die head has entrance side and outlet side.Described method can include passing through material Entrance inserts in room, pressurizes room by pressure mechanism, is moved from the entrance of cylinder by material along flow direction To outlet, the entrance side at die head receives material so that material flowing is many by being limited in bending sections Individual guide hole, described bending sections is formed at entrance side or the outlet of die head, and extrudes from the entrance side of die head Material is to form extrudate.

An aspect preferably, described method can include so that material is along the axis substantially parallel to flowing Multiple guide holes are passed through in the direction in direction.In yet another aspect, described method can include so that material passes through to be formed Opening in the bending sections of homogenizer or band plate (stip plate), described homogenizer or band plate are arranged in cylinder Between entrance and exit.

Brief Description Of Drawings

By referring to the description of hereinafter illustrative embodiments and combine accompanying drawing, aforementioned aspect of the present invention with And the mode obtaining them becomes apparent from visible, and claimed invention self is easier to understand.

Fig. 1 is the schematic diagram of extruder；

Fig. 2 is the schematic diagram of conventional extruders and flat die；

Fig. 3 is the schematic diagram of the extruder according to the present invention with bending die head；

Fig. 4 is the partial isometric view of the oval bending die head with multiple region；

Fig. 5 is the part axial symmetry sectional view of the die head of Fig. 4；

Fig. 6 is the first embodiment party of the bending die design with the constant thickness being perpendicular to outside sweep surface Formula；

Fig. 7 is the second embodiment of the constant thickness bending die design with extrusion direction；

Fig. 8 is the guide hole in bending die head and the partial section view of slot type sample；

Fig. 9 is the oval figure with basic size；

Figure 10 is the partial section view of the bending die head having and applying load；

Figure 11 is curvature and the thickness action diagram for die head stress；

Figure 12 shows that the thickness of bending die head declines production capacity figure；

Figure 13 shows that the die pressure declined corresponding to die head thickness declines figure；

Figure 14 shows that die head thickness declines affects figure to extruded velocity；

Figure 15 is the side view of the homogenizer with flexure plane；And

Figure 16 is the side cross-sectional view of the homogenizer of Figure 15, and its display has the concave surface of passage of restriction and convex Face.

In the drawings, corresponding reference is used for representing appropriate section.

Detailed Description Of The Invention

Hereinafter described embodiment is not intended to be exhaustive or limits the invention to precise forms as described below. On the contrary, select and describe these embodiments so that those skilled in the art will appreciate that and understand herein The principle of the present invention for required protection and practice.

The invention provides the extrusion equipment of a kind of improvement, and be used in process manufacturing extrudate (such as Porous ceramics base material) method.The ceramic material of batch material form is provided, and it is crowded to be passed to twin screw Go out equipment, so that batch material to mix, screen, deaerates, transmits and to be forced through die head assembly.

For purposes of the present invention, terms used herein " extrusion phase " or " extrusion " refer to batch of material Transmission of materials or the conveying cylinder by extruder, and force batch material to pass through die head assembly.Term " flowing Direction " and " extrusion direction " be used interchangeably, and represent that batch material transmission is by cylinder and be forced through mould The direction of head assembly.Additionally, term " extruder " and " extrusion equipment " are used interchangeably.

Terms used herein " batch material " can be dry ceramic raw material (such as, clay, Talcum, Aluminium oxide and mullite, binding agent/plasticiser (such as polyvinyl alcohol) and/or water) wet mixture. Such as, in batch material, the dry ingredients of about 50-75 weight % and about 25-50 weight % can be there is Wet composition.When, after reaction, batch material can form ceramic material, such as carbide or refractory oxide.

See Fig. 1, it is shown that the illustrative embodiments of double screw extruder 100.Extruder 100 includes Shell or cylinder 102, which defines interior chamber 106.By funnel 104, batch material 130 can be inserted In extruder 100, described funnel 104 is disposed adjacent to the entrance 108 of extruder 100.Work as batch material During 130 entrance extruder 100, a pair screw rod 110,112 that batch material 130 is disposed in room 106 Pickup.Screw rod 110,112 is arranged in cylinder 102 in a longitudinal direction.Longitudinal direction also referred to as extrusion Direction, it represents with arrow 114 in FIG.

Screw rod 110,112 can form pressure mechanism in cylinder 102, to pressurize and room 106 along extrusion Direction 114 forces batch material 130.Screw rod 110,112 can be with rotating Vortex or reverse rotation, mutually nibble Close or non-engagement.In one embodiment, screw rod 110,112 is rotating Vortex, engages each other and oneself The screw rod of cleaning.In this embodiment, display screw rod 110,112 is machine-processed as a type of pressure, It can be used for pressurizeing room 106.But, in other embodiments, can extrude out in plunger type During use piston, with along extrusion direction 114 force batch material.Can use in extrusion Pressure mechanism known to other.

Rotate along with screw rod 110,112 and the pressure in room 106 is increased, can be along being limited to cylinder Flow path between entrance 108 and the outlet 128 of 102 forces batch material 130.Pressure in room 106 Power also can force the material through other flow devices one or more in cylinder 102, and described flow device changes Or the stream limiting batch material 130 leaves the end of mixing screw 110,112.Such as, this type of stream Dynamic device is static plate (static plate) 118, and it can include one or more restricted opening.One Or the size and dimension of multiple restricted opening can be depending on the flowing needed for application and batch material 130 or Pressure curve.The example of flow device (such as static plate 118) is shown in the U.S. submitted on November 24th, 2010 The open series number 2011/0291319 of state is it is further described that it is the most incorporated herein by reference.

In FIG, static plate 118 can include net materials or Web materials, to filter batch material 130. One or more flow devices (including static plate 118) can have multiple opening or a passage, screw rod 110, 112 force batch material 130 by the plurality of opening or passage.In one embodiment, one or Multiple flow devices may also include another plate 120, its for promote batch material 130 local mixing and Homogenizing.Due to part batch material 130 can have different viscosities, plate 120 can by material mixing together, To improve extrusion flow velocity.As it is shown in figure 1, plate 120 can include the flexure plane 122 promoting flowing.This will be It is described more particularly below.

Once being forced through plate 120, the pressure in room 106 forces batch material 130 to arrive extrusion die 124 Another flow device of form.Die head 124 is disposed adjacent to the outlet 128 of cylinder 102 so that along arrow The product of required form is left cylinder 102 by die head 124 extrusion by the extrusion direction shown in 132.Although not Figure 1 illustrates, but die head 124 can include being limited between entrance side and the outlet side of die head 124 Multiple guide holes and groove.In FIG, the entrance side of die head 124 can have towards screw rod 110,112 Face 126.The outlet side of die head 124 can have exit face, the outlet 128 of its corresponding cylinder 102.As indicated, The bending inlet face 126 of die head 124 can be the effect needed for extrusion provides, and its part is as described below. Although the exit face of die head is shown as substantially flat, but can form uneven exit face (such as, bag Include curvature).

See Fig. 2, it is shown that conventional extrusion equipment 200.Equipment 200 includes shell or cylinder 202, by institute State shell or batch material is extruded by cylinder 202.Batch material enters cylinder 202 by entrance (not shown), And by regular die 204 in outlet 212 extrusion.Material flows along the extrusion direction shown in arrow 206 By cylinder 202, and it is extruded through die head 204 along the direction shown in arrow 214.In cylinder 202 defines Room, portion, is pressurizeed to this interior chamber by pressure mechanism.The pressure of indoor formation is to cylinder 202 and die head 214 Apply active force, as illustrated with arrow 208.

In fig. 2, regular die 204 includes flat entrance face 210 and smooth exit face 212.Exit face The outlet of 212 the most corresponding cylinders 202.The thickness of die head 204 is limited between two faces.As it has been described above, room In pressure can apply obvious active force to die head 204 so that must increase the thickness of die head 204 with Avoid deformation or tear.But, along with the thickness of die head 204 increases, for extruding the flowing in direction 206 Impedance and resistance also can be departing from hopefully increasing.

One illustrative embodiments of the extrusion equipment 300 improved is as shown in Figure 3.Outside equipment 300 includes Shell or cylinder 302, batch material is entered by described shell or cylinder 302 and is extruded.Cylinder 302 is included in one end Entrance (not shown) and outlet 312 in opposite end.Die head 304 is arranged in the outlet of cylinder 302.Cylinder 302 also define interior chamber, are carried out this interior chamber by pressure mechanism (such as extrusion screw rod or piston) Pressurization.Pressure applies active force, as indicated by arrow 308 to cylinder 302 and die head 304.Batch material along Extrusion direction flowing shown in arrow 306, and it is extruded through die head exit along the direction shown in arrow 314 312.Being different from the tabular surface of regular die 204 as shown in Figure 2, the die head 304 in Fig. 3 includes curved Bent inlet face 310 and bending exit face 312.Although display inlet face 310 and exit face 312 are both Bending, but in an alternative embodiment, only having one in two faces is bending.

See Figure 4 and 5, show an illustrative embodiments of bending die head 400 in greater detail.Mould 400 can form the first flexure plane or surface 408 and the second flexure plane or surface 410.First bending table Face 408 defines convex curvature, and the second curved surface defines concave curvature.Die head 400 may be arranged at extrusion In machine, the most as shown in Figure 3, the first curved surface 408 forms the outlet side of die head 400, the Two curved surfaces 410 form its entrance side.In different configurations, the first curved surface 408 can be formed The entrance side of die head 400, the second curved surface 410 can form its outlet side.So, die head 400 is curved Curved shape can make die head 400 can more effectively resist the pressure applied in extrusion such that it is able to Higher pressure or there is the thickness of reduction in tolerance extruder.It is similar to shown in Fig. 3, extrudes direction court To by the thickness of die head, and can be either direction (that is, die head be considered recessed or Convex).

As shown in Figure 4, die head 400 can form circular cross-section, and this circular cross-section has and is limited to central point 412 And the radius between outward flange 414.Depend on that extruder, die head 400 can have different cross section.Therefore, The circular cross-section of the die head 400 in Figure 4 and 5 is exemplary, and can be formed in other embodiments Square, rectangle, ellipse or polygonal cross-section.

Die head 400 may also include the region of multiple restriction.In the embodiment of Figure 4 and 5, die head 400 It is divided into 3 different regions.First area 402 is limited to the center near die head 400.In first area In 402, the die head feature forming honeycomb shape, such as guide hole and groove (seeing Fig. 8) can be limited wherein. First area 402 can include the region being limited between central point 412 and the first transition point 500.Additionally, First area 402 can be referred to as " bending area ", because that includes at least one of song of die head 400 Rate.

Being moved radially outward from the first transition point 500 is second area 404.Second area 404 can be referred to as " turn Become region " because the clamping/connecting portion which defines the curvature in first area 402 and die head 400 divides it Between the region of transformation.Second area 404 can be also that the first area 402 of die head 400 increases support and knot Structure integrity.Second area 404 can include solid material, in described solid material, limits the most wherein Determine guide hole or groove.Or, can limit in the second area 404 of die head 400 one or more guide hole and Groove.The region of second area 404 can be limited between the first transition point 500 and the second transition point 502.

Region between second transition point 502 and outward flange 414 is defined to the 3rd region 406.3rd region 406 can be used for die head 400 for the flange of extruder and connection.3rd region 406 can be substantially flat , and generally do not include any guide hole or groove.

One feature of the bending die head 400 in Figure 4 and 5 is first area 402 and the secondth district of a part The curved shape in territory 404.3rd region 406 can limit plane, and axle A-A is by this plane.First area 402 and part the bending of second area 404, nonplanar shape can be oval, conical, accurate Spherical, hemispherical or general bending.This shape can be changed according to application.Although in Figure 5, The second area 404 of one region 402 and a part forms nonplanar curved shape, but implements at other In mode, only first area 402 forms curved shape.In this case, second area 404 and the 3rd district Territory 406 can be substantially flat and be limited in same level.

Another aspect of bending die head is as shown in Figures 6 and 7.In figure 6, display bending die head 600 has There is the first radius R1 starting restriction from central point 606.First curvature 602 is radially disposed at from central point 606 beginnings, distance are equivalent to the position of the first radius R1.Die head 600 can include torsion 604, institute State that torsion 604 is radially disposed at from the beginning of central point 606, distance is equivalent to the position of the second radius R2 Put.As shown in Figure 6, die head thickness t, is constant on the direction vertical relative to torsion 604. But, in extrusion direction (that is, on the direction that arrow 608 represents), thickness t is only being perpendicular to second Being constant on one point of curvature 604, this point aligns with central point 606.

In order to realize flow the more balance by die head and uniform impedance, die head thickness can be in extrusion direction Substantially constant is kept in (i.e. vertical direction).Such a embodiment is as shown in Figure 7.Here, curved Bent die head 700 can include first curvature 702 and torsion 704.Die head thickness t is in first curvature 702 And be constant on the extrusion direction (direction shown in arrow 706) between torsion 704.Although changing It is apt to batch material and extrudes the flow behavior by die head 700 that flows on direction 706, but close to die head The vertical thickness of the edge of 700 is close to zero.Therefore, second area 404 as shown in Figure 4 can be mould 700 structural intergrities increasing these positions, it is done so that if, vertical thickness (such as, extrusion side To) become non-constant.

See Fig. 8, it is shown that an exemplary bending die head 800.Die head 800 can include being similar to Fig. 4 With 5 first area 802, second area 804 and the 3rd region 806.Bending die head 800 can include First curved side 810 and the second curved side 812.First curved side 810 can be entrance, the second curved side 812 can be outlet, so that with the material of (shown in arrow 814) extrusion direction flowing by the One curved side 810 enters die head 800, and leaves die head 800 from the second curved side 812.Crowded in order to be formed Going out cross section or style, die head 800 can include being limited to multiple guide hole therein and groove 808.As indicated, it is many Individual guide hole and groove 808 are basically parallel to extrude direction 814 and align.The degree of depth of the plurality of guide hole 808 can set Count into less than the conventional guide hole degree of depth, like this, it is possible to reduce the plurality of guide hole of machining and groove 808 The required time.

Bending die head can be manufactured according to known elongation method.It is, for example possible to use direct metal laser Sintering (DMLS) method produces bending die head.Z axis may be needed to regulate for boring and fluting method.Example As, can be by being poured into electro-discharge machining (plunge electrical discharge machining) (EDM) to groove Carry out machining.Several methods, such as computer numerical control (CNC) (CNC), compacting, machine can be passed through Tool processing or hot forming form die head blank.

First case study embodiment

See Fig. 9-14, formed and be similar to such as Fig. 4, the basic semiellipse die head 1000 of the die head shown in 5 and 8. Die head 1000 includes being disposed adjacent to the first area 1002 at its center, around the second of first area 1002 Region 1004 and for the 3rd region 1006 that is connected with extruder.First area 1002 can include first Curvature 1010 and torsion 1012, wherein the thickness of die head 1000 is limited to first curvature 1010 and Between two curvature 1012.As shown in Figure 10, first curvature 1010 is entrance side or the part of die head 1000, In this position, pressure 1008 applies active force to die head 1000.So, batch material is by being limited to Multiple guide holes in die head 1000 and groove from entrance side (i.e. first curvature 1010) to outlet side (i.e. second Curvature 1012).

The design of the first area 1002 of die head 1000 is similar to shown in Fig. 7 and 8.In other words, guide hole and Groove (not shown) is basically parallel to extrude direction alignment.In this case study, major variable interested It is curvature measure and the die head thickness " t " of the die head shown in short axle ellipse radii " b " of oval 900, as Shown in Fig. 7 and 9.In analysis, other numerical value maintains substantially constant.

In this embodiment, also a diameter of 11.5 inches and regular die that thickness is 2.4 inches are carried out point Analysis.Regular die includes flat entrance face and exit face, as shown in Figure 2.By this research, increase to mould The inlet face of head and the curvature of exit face cause the energy declining or tolerating more large inner pressure of die head thickness Power.

Relatively bending die head peace face mould head, analyzes the observation confirming several key.First, die head is Large deflection (deflection) occurs at the center near die head.Secondly there are two and be likely to become stress restriction The design section of feature.First design section is centrage 1014, and it is arranged along the axle C-C of Figure 10. Accordingly, it may be desirable to make peak value Feng-meter Sai Si (Von-Mises) stress of this position minimize.Compared to Two region 1004 and the 3rd regions 1006, most first area 1002 is exposed to higher stress, but It is that maximum defluxion and maximum stress occur at this centrage 1014 or near this centrage 1014.Also want to Rational stress level is maintained in the joint of second area 1004 or fillet fillet part 1016.

In this case study, curvature measure (the short axle ellipse radii " b " of i.e. oval 900) changes, To be more fully understood that the effect compared to conventional planar die head of the bending die head.See Figure 11, Figure 110 0 to show Curvature is for the impact of the peak value Feng-meter Sai Si stress of the centerline of die head.First curve 1102 be for Thickness is about first die head of 1.4 inches, the second curve 1104 be about for thickness 2.4 inches second Die head.In fig. 11, the first data point 1106 represents the first die head being configured to conventional plane die head.Change Yan Zhi, short axle ellipse radii " b " is zero.Similarly, the second data 1108 expression is configured to conventional plane Second die head of die head.Expection is due to difference in thickness, and the first regular die has in the first data point 1106 Being about the higher peak stress of 2.8, comparatively speaking, the second regular die is in the second data point 1108 about It is 1.

But, along with the change of radius " b ", result confirms that peak stress or die head thickness decline about 42%. Such as, the 3rd data point 1110 is shown relative to the first die head curve 1102.Herein, at the center of die head The constant stress that line applies realizes the thickness of the die head that radius is about 3.5 inches and declines 42% (i.e., about 1.4 Inch, corresponding to second, the second data point 1108 of relatively thin die head).Second die head curve 1104 4th data point 1112 represents that thickness is about the bending die head of 2.4 inches.Herein, thickness keeps constant, in Stress decrease at heart line about 42% (such as, in fig. 11 from 1.0 to 0.58).Therefore, by design Make die head have flexure plane, thickness can be reduced or the stress being applied on die head can be reduced.

Figure 12 confirms that die head thickness declines result.In fig. 12, Figure 120 0 shows conventional planar die head 1202 and bending die head 1204.The diameter of the first die head 1202 and the second die head 1204 may each be about 11.5 English Very little.As indicated, the thickness of the first die head 1202 is about 2.4 inches, and when being exposed to constant stress, Maintain its structural intergrity.When being exposed to the constant stress identical with the first die head 1202, the second die head 1204 maintain its structural intergrity, but the thickness of the second die head 1204 is than the first die head 1202 (such as, Thickness about 1.4 inches) have dropped about 42%.

Second case study embodiment

Second case study embodiment analyzes die head curvature further for pressure and the impact of extruded velocity. In this study, heavy type, stainless steel mold head dummy NG that thickness is about 2.37 inches are used.By this first Regular die (i.e. having flat entrance face and exit face) and gross thickness and guide hole and groove depth decline about 40% Second bending die head compare.Cordierite composition rheological parameters is used for this analysis, and selects The extruded velocity of about 1.0 inch per seconds is as baseline case.

The die pressure of the calculating of regular die is about 2099psi.For bending die head, the die head pressure of calculating Power declines close to 23% to about 1618psi.This is shown as Figure 130 0 in fig. 13.First data point 1302 Represent that thickness is about 2.37 inches and die pressure is about the regular die of 2099psi.Second data point 1304 Represent that thickness and guide hole and groove depth decline the bending die head of 40%.Extrusion speed at 1 identical inch per second Under degree, bending die head has the die pressure of calculating of 1618psi, and this is less close to 23% than regular die.

In this second embodiment, the impact for extruded velocity is also analyzed.To this end, increase bending die head Extruded velocity input parameter, until die pressure is equal to the regular die die pressure when 1 inch per second (i.e. 2099psi).So, for bending die head, the extruded velocity during die pressure of 2099psi Increase to about 3.3 inch per seconds, thus cause the increase of the production capacity more than three times.This is also illustrated as Figure 14 Figure 140 0.In Figure 140 0, the first data point 1402 represents the extrusion of 1.0 inch per seconds of regular die Speed.Second data point 1404 represents bending die head 3.3 under identical die pressure (i.e. 2099psi) The extruded velocity of the increase of inch per second.Herein, by increase die head curvature, thus reduce its thickness and Guide hole and groove depth, by the improvement of the extruded velocity of die head more than three times.

Homogenizer and other extrusion boards

Seeing described in Fig. 1, extruder can include extra flow device, such as static plate 118 and homogenizer Plate 120.Conventional homogenizer plate includes flat entrance surface and flat outlet surface, similarly as described above Regular die.But, in Figure 15 and 16, different homogenizer plate 1500 comprises the steps that inlet face 1506 The curvature of the restriction at the curvature of the restriction at place and exit face 1602.Homogenizer plate 1500 can include for The outward flange element 1502 that extruder is connected.Flange component 1502 is round the net forming homogenizer plate 1500 Shape material 1504.Flange component 1502 may be arranged in plane so that inlet face 1506 from plane to Outside sweep.This is as best shown in Figure 15.But, in different homogenizer plate, inlet face and exit face One can face directly.

Web materials 1504 can limit multiple passage or guide hole 1600.Batch material can be by described many Individual passage 1600 arrives outlet side 1602 from entrance side 1506.In this case, batch material can be along Flow by homogenizer 1500 in extrusion direction shown in arrow 1508.As indicated, multiple passages 1600 are basic It is parallel to extrude direction 1508 align.In a different embodiment, extrusion direction can be with Figure 15 Shown is in opposite direction, so that entrance exports corresponding to face 1506 corresponding to face 1602.

It is similar to the design of homogenizer plate 1500, static plate or layout other streams any in an extruder Dynamic device can include at least one flexure plane.Flexure plane can be towards the entrance side of extruder or outlet side. Flexure plane can reduce the pressure drop by flow device and improve the batch material flow behavior by extruder.

Although the principle already in connection with the present invention for required protection discloses illustrative embodiments above, but It is to the invention is not restricted to disclosed embodiment.On the contrary, it is contemplated that contain use as herein described Arbitrarily the changing, apply or change of the present invention for required protection of general principle.It addition, the application is intended to Contain and belong to of the art known or conventional practice and fall into the restriction of appended claims Interior deviates part with the present invention.

Claims (19)

1. a flow device, described flow device includes:

Being suitable to the main body being arranged in extrusion equipment, described main body is along planes bound, and described plane is basic Being perpendicular to the flow direction by described flow device, described main body has the first side and the second side, wherein, Described second side is relative with described first side, and described main body has first area, second area and the 3rd region, Wherein, described second area is limited between described first area and the 3rd region；

Forming first on the first side and form second on the second side, wherein said main body has There is the thickness being limited between described first and second；And

The multiple guide holes being limited in the main body between the first side and the second side, the plurality of guide hole is suitable to Described first side joint receives material and at described second side extruded material；

Wherein, first area includes the center of described main body, and first of the most described first area Or second and at least one of second area are formed from the outward extending curvature of plane, described first area At flow direction, there is substantially invariable thickness, and described second area has at flow direction the most permanent Fixed thickness.

2. flow device as claimed in claim 1, it is characterised in that the plurality of guide hole is the most flat Row is limited between the first side and the second side.

3. flow device as claimed in claim 2, it is characterised in that:

The plurality of guide hole is basically perpendicular to plane respectively and extends；And

Honeycomb texture is formed by the plurality of guide hole.

4. flow device as claimed in claim 1, it is characterised in that described curvature is oval, circular cone Shape, torispherical or hemispherical.

5. flow device as claimed in claim 1, it is characterised in that described 3rd region is suitable to and extrusion Equipment is connected.

6. flow device as claimed in claim 5, it is characterised in that described first area includes the first footpath To thickness and the second radial thickness, described first radial thickness is limited to the center near first area, described Second radial thickness is limited near second area；

Being further characterized in that, described first radial thickness is more than described second radial thickness.

7., for forming an extrusion equipment for extrudate, described extrusion equipment includes:

Cylinder, described cylinder has entrance in its one end, has outlet in opposite end, and described cylinder defines Room between entrance and exit；

For the pressure mechanism pressurizeing room, described pressure mechanism is arranged so that material moves from entrance To outlet；

Being limited to the flow path between the entrance and exit of indoor, described flow path defines flowing side To；

The die head being connected with the outlet of cylinder, described die head includes:

Along the main body of planes bound, described plane is basically perpendicular to flow direction, and described main body includes One region, second area and the 3rd region, wherein, described second area is limited to described first area and Between three regions；

Entrance side and outlet side, the thickness of wherein said main body is limited between entrance side and outlet side；

The multiple guide holes being limited between entrance side and outlet side, the plurality of guide hole is suitable at entrance side joint Receive material and at outlet side extruded material；

Wherein, first area includes the center of described main body, and the entrance side of the most described first area Or outlet side and at least one of second area are formed from the outward extending curvature of plane, described first area At flow direction, there is substantially invariable thickness, and described second area has at flow direction the most permanent Fixed thickness, and

Wherein, described curvature is oval, torispherical or hemispherical.

8. extrusion equipment as claimed in claim 7, it is characterised in that the plurality of guide hole is the most flat OK.

9. extrusion equipment as claimed in claim 7, it is characterised in that the plurality of guide hole with substantially along Flow direction is limited in main body.

10. extrusion equipment as claimed in claim 7, it is characterised in that described 3rd region includes institute State the edge of main body, and wherein, described 3rd region is connected with extrusion equipment.

11. extrusion equipments as claimed in claim 10, it is characterised in that described first area includes:

First radial thickness, described first radial thickness is essentially defined in the flowing at the center near first area Direction；And

Second radial thickness, described second radial thickness is limited to the interface of first area and second area, its In, described second radial thickness is less than described first radial thickness.

12. extrusion equipments as claimed in claim 10, it is characterised in that the plurality of guide hole is limited to In first area.

13. extrusion equipments as claimed in claim 7, described extrusion equipment also include being arranged in entrance and Indoor homogenizer between die head, described homogenizer includes:

Interior part and outer portion, described outer portion is connected with cylinder, and first included towards entrance is divided in described inside Side and second side positioned opposite with described first side；And

Being limited to the multiple openings in the interior part between the first side and the second side, the plurality of limited opening is It is basically parallel to flow direction；

Wherein, at least one of the first side and the second side has bending sections.

14. extrusion equipments as claimed in claim 13, it is characterised in that the first side and the second side all have There is bending sections.

15. extrusion equipments as claimed in claim 7, described extrusion equipment also include being arranged in entrance and Indoor plate between die head, described plate has the outer portion being connected with cylinder and the inside comprising filter Point, described interior part has at least one flexure plane.

16. extrusion equipments as claimed in claim 15, it is characterised in that described interior part has first Flexure plane and the second flexure plane, wherein said first flexure plane towards entrance the second flexure plane towards die head.

17. 1 kinds of methods forming extrudate in extrusion equipment, described extrusion equipment includes: cylinder, institute State cylinder there is in its one end entrance and there is in opposite end outlet, limit in cylinder between the inlet Room, pressure mechanism, and die head, described method includes:

Material is inserted indoor by entrance；

By pressure mechanism, is pressurizeed in room；

Material is made to move to outlet along flow direction from the entrance of cylinder；

Entrance side at die head receives material, and described die head includes:

Main body, described main body is along being perpendicular to the planes bound of flow direction, and described main body has the firstth district Territory, second area and the 3rd region, wherein, described second area is limited to described first area and the 3rd district Between territory, wherein, the thickness of described main body is limited between described entrance side and outlet side；

Multiple guide holes being limited between described entrance side and outlet side；

Wherein, first area includes the center of described main body, and the entrance side of the most described first area Or outlet side and at least one of second area are formed from the outward extending curvature of plane, described first area At flow direction, there is substantially invariable thickness, and described second area has at flow direction the most permanent Fixed thickness, and

Wherein, described curvature is oval, torispherical or hemispherical；

Force the material through the plurality of guide hole；And

Material is extruded from the outlet side of die head, to form extrudate.

18. methods as claimed in claim 17, described method also includes so that material is along substantially parallel In the direction of flow direction by the plurality of guide hole.

19. methods as claimed in claim 17, described method also includes so that material is by being formed at all Change the opening in the bending sections of device or band plate, described homogenizer or band plate be arranged in cylinder entrance and exit it Between.