CN201432400Y

CN201432400Y - Extrusion molding die head

Info

Publication number: CN201432400Y
Application number: CN200920070590XU
Authority: CN
Inventors: 王朝生; 李敏; 王华平; 李健武; 赵万金; 王维中; 金剑明
Original assignee: Donghua University
Current assignee: Donghua University
Priority date: 2009-04-17
Filing date: 2009-04-17
Publication date: 2010-03-31
Anticipated expiration: 2019-04-17

Abstract

The utility model relates to an extrusion molding die head, in particular to an extrusion molding die head applicable to high efficiently processing mushy materials by extrusion molding, which comprises a cavity of the die head, wherein the cavity of the die head is divided into a first class lead-in area, a first class die orifice compression area, a second class lead-in area, a second class dieorifice compression area and a capillary area, wherein the first class lead-in area is cylindrical, the first class die orifice compression area is turbinate, the bottom of the turbination is connected with the cylindrical first class lead-in area, an extrusion hole is arranged on the conic node of the turbinate first class die orifice compression area, a plurality of extrusion holes are arrayed on the inclined plane of the turbinate first class die orifice compression area, the extrusion holes consist of the second class lead-in area, the second class die orifice compression area and the capillary area, the second class lead-in area 3 is a cylindrical small hole, the capillary area is a cylindrical micropore, and the second class die orifice compression area is a turbinate hole which communicates the second class lead-in area and the capillary area. The utility model solves the problem of high efficient and uniform extrusion of the mushy materials, thereby making up the deficiency that the prior technology for manufacturing the die head is difficult.

Description

A kind of extrusion molding die head

Technical field

The utility model relates to a kind of extrusion molding die head, particularly relates to a kind of extrusion molding die head that is applicable to the efficient evenly extrusion molding processing of pastes.

Background technology

The hole count that increases on the spinning extrusion mould-outlet is an effective way that increases production capacity and enhance productivity.But for special pasty state macromolecule and low-molecular-weight agent mixture,, rely on traditional simple increase spinneret orifice number, in the process of extruding, can cause the delay of material in die orifice because its flowability does not have melt or solution good.And this has a strong impact on uniformity and stability that gained is extruded product, and then adds after making and be difficult to high-quality carrying out.

Present open source information is discussed few with document to relevant mode and means, patent application 200710069976.4 discloses a kind of by the die head intersection is designed to wedge angle, realize extruding smoothly of polytetrafluoroethylene (PTFE) thickener, but the difficulty of processing of this die head is big, is difficult to extensive use.

Summary of the invention

The purpose of this utility model provides a kind of extrusion molding die head, a kind of extrusion molding die head that is applicable to the high efficiency extrusion molding processing of pastes particularly is provided, provide a kind of extrusion die of simple and feasible, make extruding of pastel to carry out smoothly; Simple in structure, easily manufactured, realize easily, and economic benefit is obvious.The utility model has solved the efficient problem of evenly extruding of pastes, has remedied the big deficiency of prior art die head manufacture difficulty.

A kind of extrusion molding die head of the present utility model, die cavity is divided into the one-level Lead-In Area, one-level die orifice compressional zone, the secondary Lead-In Area, five parts in secondary die orifice compressional zone and capillary district, the one-level Lead-In Area is cylindrical, one-level die orifice compressional zone is a turbination, obconic bottom and one-level Lead-In Area are cylindrical joining, the vertex of a cone of obconic one-level die orifice compressional zone has an extrusion cavities, arrange at least one extrusion cavities on the inclined-plane of obconic one-level die orifice compressional zone, described extrusion cavities is by the secondary Lead-In Area, secondary die orifice compressional zone and capillary district form, the secondary Lead-In Area is cylindrical aperture, the capillary district is cylindrical micropore, and secondary die orifice compressional zone is the turbination hole that is communicated with secondary Lead-In Area and capillary district.

As optimized technical scheme:

Wherein, aforesaid a kind of extrusion molding die head considers that the one-level Lead-In Area is cylindrical, so the extrusion cavities of arranging on the inclined-plane of described one-level die orifice compressional zone 2 is equidistantly to distribute by concentric circles.Can guarantee the pressure unanimity of different secondary Lead-In Areas like this, get the material of same amount in the extrusion, realize evenly extruding of porous.

Aforesaid a kind of extrusion molding die head, the draw ratio of the cylindrical micropore in described capillary district 5 is 4～20: 1.Because the molecule of pasty material all is to be in constrained state, is difficult for obtaining the higher degree of orientation in extrusion, so the draw ratio in proper extension capillary district helps improving the degree of orientation of extruding product.But if draw ratio is excessive, then required extrusion pressure also increases, and destroys established rock-steady structure on the contrary, causes discontinuous extruding.

A kind of extrusion molding die head of the present utility model, nib is set up in die orifice shrinking zone at extrusion die, from top to bottom successively by the one-level Lead-In Area, one-level die orifice compressional zone, the secondary Lead-In Area, secondary die orifice compressional zone, the capillary district forms, such design can be avoided the platform between nib, thereby effectively eliminates the trapping phenomena of material.

The beneficial effects of the utility model are: a kind of extrusion molding die head of the present utility model, the utility model compared with prior art have easy, effective advantage, and production efficiency is extruded in raising by a relatively large margin, for good basis is laid in the back processing of extruding product.

Description of drawings

The generalized section of a kind of extrusion molding die head that Fig. 1 provides for the utility model;

The schematic top plan view of a kind of extrusion molding die head that Fig. 2 provides for the utility model.

The specific embodiment

Below in conjunction with the specific embodiment, further set forth the present invention.

As shown in Figure 1, it is a kind of extrusion molding die head of the present utility model, it is a kind of extrusion molding die head that is applicable to the high efficiency extrusion molding processing of pastes, die cavity is divided into one-level Lead-In Area 1, one-level die orifice compressional zone 2, secondary Lead-In Area 3,5 five parts in secondary die orifice compressional zone 4 and capillary district, one-level Lead-In Area 1 is cylindrical, one-level die orifice compressional zone 2 is turbinations, obconic bottom and one-level Lead-In Area 1 are cylindrical joining, the vertex of a cone of obconic one-level die orifice compressional zone 2 has an extrusion cavities, arrange some extrusion cavities on the inclined-plane of obconic one-level die orifice compressional zone 2, described extrusion cavities is by secondary Lead-In Area 3, secondary die orifice compressional zone 4 and capillary district 5 form, secondary Lead-In Area 3 is cylindrical apertures, capillary district 5 is cylindrical micropores, and secondary die orifice compressional zone 4 is the turbination holes that are communicated with secondary Lead-In Area 3 and capillary district 5.

Wherein, the extrusion cavities of arranging on the inclined-plane of described one-level die orifice compressional zone 2 is to distribute by concentric circles, and the draw ratio of the cylindrical micropore in described capillary district 5 is 4～20: 1.

As illustrated in fig. 1 and 2, on the same circumference on the inclined-plane of the one-level compressional zone of extrusion die, set up eight nibs.

After thickener enters extrusion die, because the interaction energy of Lead-In Area keeps the type of flow of horizontal sliding streaming, in constricted zone, material also is extruded in the middle of the process of advancing, but because the transfer function of the power of one-level Lead-In Area makes each secondary Lead-In Area can both guarantee entering of a certain amount of material.Material is again through the secondary compressional zone afterwards, and structure arrangement effect capillaceous further guarantees to obtain the slice of even structure, thereby realizes that porous is even, stable extrusion.

The circular cone drift angle angle of one-level compressional zone is 60～90 degree, and the circular cone drift angle angle of secondary compressional zone is 30～90 degree, and the draw ratio in capillary district is 4～20: 1.

Through evidence, a kind of extrusion molding die head of the present utility model has solved the efficient problem of evenly extruding of pastes really, has remedied the big deficiency of prior art die head manufacture difficulty.

Claims

1. extrusion molding die head, it is characterized in that: die cavity is divided into one-level Lead-In Area (1), one-level die orifice compressional zone (2), secondary Lead-In Area (3), (5) five parts in secondary die orifice compressional zone (4) and capillary district, one-level Lead-In Area (1) is cylindrical, one-level die orifice compressional zone (2) is a turbination, obconic bottom and one-level Lead-In Area (1) are cylindrical joining, the vertex of a cone of obconic one-level die orifice compressional zone (2) has an extrusion cavities, arrange at least one extrusion cavities on the inclined-plane of obconic one-level die orifice compressional zone (2), described extrusion cavities is by secondary Lead-In Area (3), secondary die orifice compressional zone (4) and capillary district (5) are formed, secondary Lead-In Area (3) is cylindrical aperture, capillary district (5) is cylindrical micropore, and secondary die orifice compressional zone (4) is the turbination hole that is communicated with secondary Lead-In Area (3) and capillary district (5).

2. a kind of extrusion molding die head as claimed in claim 1 is characterized in that the extrusion cavities of arranging on the inclined-plane of described one-level die orifice compressional zone (2) is to distribute by concentric circles.

3. a kind of extrusion molding die head as claimed in claim 1 is characterized in that the draw ratio of the cylindrical micropore in described capillary district (5) is 4～20: 1.