CN202029373U

CN202029373U - Asymmetric compound head for flow channel of a wide-film extruder

Info

Publication number: CN202029373U
Application number: CN2011200408370U
Authority: CN
Inventors: 陈杰; 闫普选; 欧安林
Original assignee: CHINA CHEMICAL GUILIN ENGINEERING Co Ltd
Current assignee: CHINA CHEMICAL GUILIN ENGINEERING Co Ltd
Priority date: 2011-02-17
Filing date: 2011-02-17
Publication date: 2011-11-09
Anticipated expiration: 2021-02-17

Abstract

The utility model discloses an asymmetric compound head for flow channel of a wide-film extruder, which comprises a plurality of extrusion heads arranged side by side. Flow channel intersections among flow channel cavities of adjacent extrusion heads are connected through mixers or flow separators; the flow channel cavity of the extruder heads on the outmost side adopts an asymmetrical structure; and the flow channel cavities of the extruder heads in the middle adopt symmetrical structures. The asymmetrical structure of the flow channel cavity adopts a mode that the top of the flow channel cavity is deviated outwards and is extruded from the extrusion center line, and an angle between the open direction of the inner side flow channel of the flow channel cavity and the extrusion center line is larger than that between the open direction of the outer side flow channel of the flow channel cavity and the extrusion center line. By adopting the asymmetrical flow channel structure, the extruder head realizes that two or more flow channels are connected in parallel for extrusion, thus skillfully enlarging the width specifications of producible films, improving the maximal production efficiency, reducing the manufacture cost and the machining difficulty, and guaranteeing the compound strength and the film quality under sufficient pressure and space.

Description

Broad-amplitude film extruder runner asymmetric compound head

(1) technical field:

The utility model relates to the broad-amplitude film production equipment, specifically is a kind of broad-amplitude film extruder runner asymmetric compound head.

(2) background technology:

The broad-amplitude film extruder is to adopt extrusion calendaring to produce the capital equipment of broad-amplitude film, adopts extrusion calendaring to produce the product quality that broad-amplitude film can significantly improve film, can overcome the deficiency of traditional processing technology, and can significantly improve the production efficiency of film.

The broad-amplitude film extruder mainly is made up of pin cold feed extruder and broad-amplitude film head, and extruder has determined the maximum production capacity of equipment, and head has determined the fertile goods specification of equipment.The maximum production capacity of the pin cold feed extruder of present domestic maximum specification is about 4000kg/h, and the width specifications of broad-amplitude film routine is about 600～2500mm.

Adopt an extruder configuration balance runner formula broad-amplitude film extruder head, can carry out the broad-amplitude film production of small dimension in the routine, relatively be fit to produce the film of 1000～1600mm width, and produce width is the film of 600～800mm, and the flow channel domestic demand is installed huge fill block, operation inconvenience, and the formed actual runner unreasonable structure of this large-scale fill block and runner plate, be not easy to sizing material and flow, cause the glue temperature too high, influence film quality.For the broad-amplitude film of width more than 1800mm, the production capacity deficiency of an extruder, line speed is low, particularly for the film more than the thickness 6mm, when width reaches certain limit, because of line speed is low excessively, even can not satisfy the ordinary production requirement.

For addressing the above problem, application number is ZL200820113449.9's " broad-amplitude film is extruded unit " utility model patent, provide and adopted two or two above extruder while feed in a two-chamber or multi-cavity composite machine head, satisfy simultaneously and can produce separately by an extruder, solution that also can two or several extruder co-productions.

But this utility model patent does not specifically describe the version of composite machine head runner, and flow passage structure is the key point place that this scheme realizes.

(3) utility model content:

The purpose of this utility model has provided and a kind ofly can satisfy single chamber and extrude production, can satisfy the broad-amplitude film extruder runner asymmetric compound head that two-chamber or multi-cavity are extruded production jointly again.

Can realize the broad-amplitude film extruder runner asymmetric compound head of above-mentioned purpose, comprise a plurality of extruder heads side by side, flow passage chamber intersection between adjacent extruder head is provided with mixed flow device or materials flow separator, the flow passage chamber of outermost that different is (about two) extruder head adopts unsymmetric structure, and the flow passage chamber of middle each extruder head adopts symmetrical structure.

The unsymmetric structure of described flow passage chamber departs from respect to the integral body of extruding center line for flow passage chamber on the one hand, promptly the flow passage chamber top laterally (opposite direction of the compound side of film) depart from and extrude center line.

The runner open form that is flow passage chamber on the other hand is asymmetric, and sizing material need carry out the conveying of the runner emphasis consideration sizing material of a compound side, and runner open form direction needs bigger with the angle of extruding center line; Do not need to carry out how steadily compound outer side runner emphasis considers be build-up pressure, extruded velocity with sizing material in balance two side runners, guarantee sizing material width extrude uniform and stable, so this side runner direction needs less with the angle of extruding center line.

Be that flow passage chamber inboard (the compound side of film) runner open form direction and the angle of extruding center line are greater than outer side runner open form direction of flow passage chamber and the angle of extruding center line in sum.

According to the variation that runner is extruded the difference and the extruder specification of width, the flow passage chamber top depart from extrude center line span between 30mm～50mm; Side runner open form direction and the angle span of extruding center line are between 53 °～57 ° in the flow passage chamber, and the best is 53 °, 54 °, 55 °, 56 °; The outer side runner open form direction of flow passage chamber and the angle span of extruding center line are between 45 °～50 °, and the best is 45 °, 46 °, 47 °, 48 °.

(choosing dress) runner embedded block can be set at the runner mouth of flow passage chamber, change the film width specification by the width that changes runner and runner exit.

Arc transition is adopted in the side of described runner embedded block and flow passage chamber and junction, bottom surface.

Advantage of the present utility model:

1, the extruder head of the utility model broad-amplitude film extruder runner asymmetric compound head is by adopting asymmetric runner structure, realized that two or more runner parallel connections extrude, the various advantages that extrusion calendaring is produced broad-amplitude film have not only been inherited, and strengthened the width specifications that to produce film dexterously, improve maximum production capacity, and greatly reduced manufacturing cost and difficulty of processing.

2, asymmetric runner structure has well solved the compound problem that different runners are extruded film, and under enough pressure and composite space, combined strength bination and film quality all are guaranteed.

3, the runner embedded block after the optimization more meets the rule that sizing material flows under the molten condition, helps flowing of sizing material, prevents to produce dead glue.

(4) description of drawings:

Fig. 1 is the perspective view of a kind of embodiment of the utility model.

Fig. 2 is the planar structure schematic diagram of Fig. 1 embodiment, shows the flow passage chamber asymmetry parameter.

Fig. 3 is shown in flow passage chamber arranged outside runner embedded block among Fig. 1.

Fig. 4 is shown in the flow passage chamber inboard runner embedded block is set among Fig. 1.

Fig. 5 is the structural representation of runner embedded block among Fig. 3, Fig. 4.

Figure number sign: 1, extruder head; 2, flow passage chamber; 3, mixed flow device; 4, materials flow separator; 5, runner embedded block; 6, side; 7, bottom surface.

(5) specific embodiment:

The utility model broad-amplitude film extruder runner asymmetric compound head is made of side by side the extruder head 1 of two different models or same model, as Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, two extruder head 1 horizontal Tiles, the outlet of two extruder heads 1 is in a straight line.

1, connect by the mixed flow device 3 that is provided with between two extruder heads 1, carry out two productions of extruding:

As shown in Figure 3, mixed flow device 3 is connected the intersection in two extruder heads, 1 adjacent channels chamber 2, when two extruder heads 1 are extruded sizing material simultaneously, can produce the film of wide specification, when producing the smaller slightly film of width, the minimum range that can be provided with respectively between runner embedded block 5, the two runner embedded blocks 5 in the flow passage chamber 2 runner mouths outside of two extruder heads 1 is the width specifications of extruding film.

2, need singly extrude when producing, materials flow separator 4 is set between two extruder heads 1:

As shown in Figure 4, materials flow separator 4 is connected the intersection in two extruder heads, 1 adjacent channels chamber 2, when the independent material extrusion of two extruder heads 1, can produce the film of different in width specification; In the time of will producing the film of littler width specifications respectively, flow passage chamber 2 runner mouth inboards at two extruder heads 1 are provided with runner embedded block 5 (unsymmetric structure in balanced runner chamber 2), and the minimum range of runner embedded block 5 between the flow path boundary of the outside of each extruder head 1 is the width specifications of producing film when extruding sizing material separately.

1, the structure of the embedded block of runner described in 25 more helps flowing of sizing material by optimal design, and the side 6 and the bottom surface 7 that are specially runner embedded block 5 adopt arc transition to flow passage chamber 2, as shown in Figure 5.

As shown in Figure 2, described flow passage chamber 2 adopts unsymmetric structure:

1, the top of each flow passage chamber 2 is departed from laterally and is extruded center line 30mm～50mm.

2, the interior side runner open form direction of each flow passage chamber 2 is 53 °～57 ° with the angle of extruding center line, and the best is 53 °, 54 °, 55 °, 56 °; The outer side runner open form direction of flow passage chamber 2 is 45 °～50 ° with the angle of extruding center line, and the best is 45 °, 46 °, 47 °, 48 °.

Claims

1. broad-amplitude film extruder runner asymmetric compound head, comprise a plurality of extruder heads (1) side by side, flow passage chamber (2) intersection between the adjacent extruder head (1) is provided with mixed flow device (3) or materials flow separator (4), it is characterized in that: the flow passage chamber (2) of outermost extruder head (1) adopts unsymmetric structure, and the flow passage chamber (2) of middle each extruder head (1) adopts symmetrical structure.

2. broad-amplitude film extruder runner asymmetric compound head according to claim 1 is characterized in that the unsymmetric structure of described flow passage chamber (2) is: the top of flow passage chamber (2) is departed from laterally and is extruded center line.

3. broad-amplitude film extruder runner asymmetric compound head according to claim 2 is characterized in that: the interior side runner open form of flow passage chamber (2) direction and the angle of extruding center line are greater than the outer side runner open form of flow passage chamber (2) direction and extrude the angle of center line.

4. broad-amplitude film extruder runner asymmetric compound head according to claim 3 is characterized in that: the top of flow passage chamber (2) is departed from and is extruded center line 30mm～50mm; The interior side runner open form of flow passage chamber (2) direction is 53 °～57 ° with the angle of extruding center line; The outer side runner open form of flow passage chamber (6) direction is 45 °～50 ° with the angle of extruding center line.

5. according to any described broad-amplitude film extruder runner asymmetric compound head in the claim 1～4, it is characterized in that: the runner mouth of described flow passage chamber (2) is provided with the runner embedded block (5) that changes runner and runner exit width.

6. broad-amplitude film extruder runner asymmetric compound head according to claim 5 is characterized in that: the side (6) of described runner embedded block (5) and bottom surface (7) adopt arc transition to flow passage chamber (2).