CN203680782U

CN203680782U - Transition ring for connecting plastic extruder with die head

Info

Publication number: CN203680782U
Application number: CN201420031503.0U
Authority: CN
Inventors: 查安平; 蒋标; 马群柱; 潘雯; 周汉生
Original assignee: TONGLING GREAT EXTRUSION TECHNOLOGY CO LTD
Current assignee: TONGLING GREAT EXTRUSION TECHNOLOGY CO LTD
Priority date: 2014-01-17
Filing date: 2014-01-17
Publication date: 2014-07-02
Anticipated expiration: 2024-01-17

Abstract

The utility model relates to a transition ring for connecting a plastic extruder with a die head. A plurality of shunting channels are arranged in the transition ring, the shunting channels comprise external shunting channels which are slant from inside to outside along the axial direction and internal shunting channels which are slant from outside to inside along the axial direction, and the internal and external shunting channels are sequentially distributed on the transition ring along the peripheral direction in a staggered manner. According to the transition ring for connecting the plastic extruder with the die head, an internal material flow and external material flow of melted material interchange with each other, the melted material is further mixed and pressurized in the internal and external slant shunting channels and then the plastication of the melted material is improved, and thus the material entering into the die head is uniformly plasticized, the material flow is stable, and the physical performance of sectional material can be improved.

Description

The transition rings of connecting plastic extruder and die head

Technical field

The utility model relates to the transition rings of a kind of connecting plastic extruder and die head.

Background technology

In plastic material process, conventionally extruder is connected by an annular transition rings with die head, has runner in the middle of transition rings, and fused materials passes through after extruding machine barrel, Screw Extrusion, by the runner in the middle of circular transition rings, directly clamp-on in extrusion die runner.Because of the plasticizing of fused materials ectonexine in runner of extruding machine barrel, Screw Extrusion not necessarily very even, particularly old extruder, barrel, screw clearance change, can not ensure the good plasticizing of fused materials ectonexine, material fluidity also there are differences, flow velocity inequality, and in runner, fusion pressure is inconsistent everywhere, cause product physical property there are differences, when serious, can make the physical property of section bar not reach national standard.

In order to address the above problem, transition rings is arranged to porous plate to technical staff or employing has spirality compared with the milling device of large through-hole runner.The patent No. be the Chinese patent of ZL201020539262.2 disclosed be exactly a kind of like this transition rings as milling device.Porous plate only, to extruded material pressurization, can not make mixing of materials, restructuring.And spirality milling device is because being subject to processing restriction, in the time making, can only open the mixing chamber of a small amount of spirality (being generally 5～8), in less mixing chamber, little to increasing flowpath pressure effect, the mixing of ectonexine material is not fully, accurately.Therefore, all can not improve well the physical property of extrusion profile.

Summary of the invention

For the deficiencies in the prior art part, the utility model provides the transition rings of a kind of connecting plastic extruder and die head, can make fused materials when by transition rings, mix plasticizing evenly, and material levelling is steady, can improve section bar performance.

The utility model has adopted following technical scheme: in the middle of transition rings, be provided with multiple flow manifolds, described flow manifold comprises the external shunt runner tilting from inside to outside vertically and the interior flow manifold that ecto-entad tilts vertically, and described inside and outside flow manifold is along the circumferential direction interspersed successively in transition rings.In the time that the fused materials from extruder passes through transition rings, interior flow manifold imports outer field fused materials the centre of die head feeding mouth, external shunt runner imports middle fused materials the skin of die head feeding mouth, make ectonexine material occur to exchange and further mix, and material increases because cross section of fluid channel reduces to make pressure when by transition rings, and when the runner that process is obliquely installed, pressure further increases, and can improve plasticizing effect.

Further, described inside and outside flow manifold cross sectional shape is fan-shaped.Adopt the runner of sector crosssection, can make full use of the end face of transition rings, expand total overflow section of transition rings upper runner, thereby improve conveyance capacity.

Further, inside and outside flow manifold sectional area is constant vertically.Material pressure when by inside and outside flow manifold is even, can steadily pass through.

Further, the symmetrical centre of the import and export of described inside and outside flow manifold distributes with one heart vertically respectively on the end face of transition rings both sides.This structure is not only convenient to processing flow channel, and the shunting of inside and outside flow manifold evenly, and material stream can be steadily by overcurrent ring.

Further, in transition rings, be disposed radially several layers of inside and outside flow manifold.By the inside and outside flow manifold of multilayer is set, runner quantity is further increased, when fused materials is when a point multilayer is passed through transition rings vertically, material is separated and merges by multiple flow manifolds at import and export end, and with layered material stream inside and outside exchange under the effect of inside and outside flow manifold, can improve further plasticizing effect, can also reduce the slope of inside and outside flow manifold, convenient processing.

Preferably, transition rings center is provided with axial center flow channels.By center flow channels, all can there be to internal layer material in the inside and outside portion of outer material being imported to by interior flow manifold in die head, can further improve its mixing, plasticizing effect.

Preferably, transition rings center is provided with to the spreader of both sides projection, by guiding and the shunting of spreader, makes material more steady into and out of transition rings.

As shown from the above technical solution, the utility model exchanges the inside material stream of fused materials and outside material stream, fused materials obtains further mixing, supercharging and raising plastication in the process of inside and outside flow manifold by tilting, the material inside and outside that enters die head is plastified evenly, material levelling is steady, can improve the physical property of section bar.

Brief description of the drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is along P-P line profile in Fig. 1;

Fig. 3 is along M-M line cutaway view in Fig. 1;

Fig. 4 is along M-M line cutaway view in another embodiment Fig. 1;

Fig. 5 is the structural representation that the utility model adopts two-layer inside and outside flow manifold embodiment;

Fig. 6 is along N-N line profile in Fig. 5;

Fig. 7 is the utility model fundamental diagram.

Detailed description of the invention

As shown in Figure 1 to Figure 3, transition rings 1 is a disk, and centre is provided with the external shunt runner 3 tilting from inside to outside vertically and the interior flow manifold 2 that ecto-entad tilts vertically, and inside and

outside flow manifold

2,3 is along the circumferential direction interspersed successively in transition rings 1.

Inside and

outside flow manifold

2,3 cross sectional shapes are fan-shaped, and the length of side of interior flow manifold 2 sector crosssections is successively decreased to outlet 22 gradually by import 21, and arc length increases progressively gradually, and its sectional area is remained unchanged; 3 of external shunt runners are contrary, and the length of side of sector crosssection is increased progressively to outlet 32 gradually by import 31, and arc length is successively decreased gradually, and its sectional area is remained unchanged equally.In this example, the overflow section of inside and

outside flow manifold

2,3 is long-pending identical, the evenly inside and

outside flow manifold

2,3 of turnover of material stream while making to shunt, and also in the time being connected with die head with extruder, transition rings both ends of the surface can be exchanged use.

The overflow section of above-mentioned inside and

outside flow manifold

2,3 is long-pending also can be reduced vertically gradually, and when material is passed through, pressure further increases, and is conducive to mixingly, but total conveyance capacity of transition rings declines.

The symmetrical centre of the import and

export

21,31 and 22,32 of inside and outside flow manifold distributes with one heart vertically respectively on transition rings 1 both sides end face, and the import and export of inside and

outside flow manifold

2,3 is distributed on donut.At transition rings entrance point, the import 21 of interior flow manifold 2 is positioned on the annulus of outside, and the import 31 of external shunt runner 3 is positioned on the annulus of inner side.At the transition rings port of export, the outlet 22 of interior flow manifold 2 is positioned on the annulus of inner side, and the outlet 32 of external shunt runner 3 is positioned on the annulus of outside.

The import and

export

21,31 and 22,32 of inside and outside flow manifold can arrange chamfering, so that material supercharging while entering runner, and can spread rapidly while flowing out runner.

Runner quantity is too much, and single cross section of fluid channel is long-pending little, processing inconvenience, and quantity is very few, and the effect of the supercharging of material, mixing, plasticizing, shunting declines.Therefore, the quantity of inside and

outside flow manifold

2,3 is more suitable with 20～40.

Transition rings 1 center is provided with axial center flow channels 4.Also can be as shown in Figure 4, the spreader 5 to both sides projection is set, be used for to material guiding and shunting into and out of transition rings 1.

The inside and outside flow manifold of multilayer radially can be set in transition rings 1.Fig. 5 and Figure 6 shows that the embodiment that two-layer inside and outside flow manifold is set, the inside and outside flow manifold of

internal layer

2,3 outsides, are provided with the inside and outside flow manifold 2a of the second layer, 3a.

Its operation principle as shown in Figure 7, the screw rod of extruder 6 by fused materials in the time that the inside and outside flow manifold of transition rings 1 is delivered to the runner in die head 7, outer material 81 flow into internal layer along interior flow manifold 2, and internal layer material 82 imports skin through external shunt runner 3, mid portion material 82 flow to the runner center of die head 7 through the center flow channels 4 at transition rings center.After transition rings 1, inside and

outside layer material

82,81 carries out mixing and plasticizing when exchange, and the material inside and outside that enters die head is plastified evenly, and fusion pressure is more consistent, and material stream is more steady.

Claims

1. the transition rings of connecting plastic extruder and die head, in the middle of transition rings (1), be provided with multiple flow manifolds, it is characterized in that: described flow manifold comprises the external shunt runner (3) tilting from inside to outside vertically and the interior flow manifold (2) that ecto-entad tilts vertically, and described inside and outside flow manifold (2,3) is along the circumferential direction interspersed successively in transition rings (1).

2. the transition rings of connecting plastic extruder according to claim 1 and die head, is characterized in that: described inside and outside flow manifold (2,3) cross sectional shape is fan-shaped.

3. the transition rings of connecting plastic extruder according to claim 2 and die head, is characterized in that: inside and outside flow manifold (2,3) sectional area is constant vertically.

4. the transition rings of connecting plastic extruder according to claim 2 and die head, it is characterized in that: the symmetrical centre of the import and export (21,31,22,32) of described inside and outside flow manifold distributes with one heart vertically respectively on the end face of transition rings both sides.

5. the transition rings of connecting plastic extruder according to claim 4 and die head, is characterized in that: in transition rings, be disposed radially several layers of inside and outside flow manifold.

6. according to the connecting plastic extruder described in claim 1 or 2 or 3 or 4 or 5 and the transition rings of die head, it is characterized in that: transition rings center is provided with axial center flow channels (4).

7. according to the connecting plastic extruder described in claim 1 or 2 or 3 or 4 or 5 and the transition rings of die head, it is characterized in that: transition rings center is provided with to the spreader of both sides projection (5).