CN2407922Y

CN2407922Y - Plastic multilayer co-extruder head device

Info

Publication number: CN2407922Y
Application number: CN 00227270
Authority: CN
Inventors: 马镇鑫
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-01-31
Filing date: 2000-01-31
Publication date: 2000-11-29
Anticipated expiration: 2010-01-31

Abstract

The utility model relates to a plastic multilayer coextrusion machine head device. The utility model is characterized in that the defect of existence of material pressure difference between a position near a material inlet and a position away from the material inlet inside a machine head of a traditional type can be overcome by using multiple passages or changing the structure and the shape of the passage as entering the machine head. The utility model is suitable for a multilayer coextrusion machine head, for example, the fabrication of a film with three layers of different functions.

Description

The multi-layer co-extruded frame head apparatus of a kind of plastics

The utility model relates to a kind of multi-layer co-extruded frame head apparatus of plastics of modified form.

Traditional device exists the pressure of charging in groove inhomogeneous because the feeding-passage of its plug is the annular recess shape of inclination, and it usually causes charging few owing to feed pressure is low away from the charging aperture place, even fracture.

The purpose of this utility model is to provide the uniform plastics of a kind of feed distribution multi-layer co-extruded frame head apparatus.

The utility model is achieved in that the multi-layer co-extruded frame head apparatus of a kind of plastics, and it comprises charging runner (1) more than two and the multi-layer co-extruded head corresponding with it, it is characterized in that: runner (1) is communicated with the passage that enters head (2) more than two.Since after the material that enters head from runner (1) is shunted respectively from nearly material porch with depress simultaneously away from the material porch, overcome the above-mentioned low defective of pressure away from the porch material.

The utility model can be specific like this: passage (2) is at the recessed Y-shaped groove (4) that forms in plug (3) surface.The damping ring (5) that annular projection is arranged in the below of groove (4).The shunting action of Y-shaped groove (4) cooperates the improvement in performance of having finished pan feeding uniform distribution blanking pressure with all pressures effect of damping ring (5).

The utility model also can adopt another kind of structure to realize the function of the described device of a kind of claim 1, it is characterized in that: plug (3) cross section parallel and the mutual decentraction of groove (4) root section with the lip-deep groove of plug (3) (4) root section, and groove (4) corresponding to the groove depth at feeding mouth place greater than groove depth away from the feeding mouth place.Because groove depth place pan feeding flow is big, pressure is low, and the little pressure height of the shallow place of groove flow; It is big and away from the little defective of pan feeding place pressure that this structure has just in time been offseted the nearly pan feeding of traditional structure place pressure.

Said structure is if add the damping ring (5) of the annular projection of establishing in the below of groove (4).Effect can be better.

The utility model can also do on the above-mentioned basis following perfect: runner (1) can be divided into the runner (A) more than two, is provided with flow divider valve (6) between runner (1) and runner (A).Control pull bar (7) is connected with the core rod (8) of head.

Adopt runner (A) to enter head from diverse location further with the material shunting, the pressure that the order material flows in head is more even, and distributing valve (6) can adjust, the even flow of each runner (A).The upper and lower adjustment pulling of bar (7) can be adjusted the speed of discharging, if adopt computer control, can accurately control discharging.

The utility model is owing to adopted the charging runner to be connected or the interior single channel of head with the interior split channel of the head more than two, but this passage is nearly pan feeding place groove depth, away from the shallow annular shape of pan feeding place groove, thereby it is even to have reached feed distribution, the purpose of extruded product thickness unanimity.

Fig. 1 is a kind of product structure schematic diagram of the present utility model.

Fig. 2 is the split channel structural representation that a kind of product of the present utility model is connected with runner.

Fig. 3 is the another kind of split channel structural representation that is connected with runner of a kind of product of the present utility model.

Fig. 4 is two runners that are connected with runner and the flow divider valve structural representation thereof of a kind of product of the present utility model.

1 kilogram of bottle blowing machine of the three-layer co-extruded two-shipper head of embodiment 1 2SPZADIII-1 type

Three-layer co-extruded bimodulus head by three independently extruder will plastify material and be sent in the branching block separately sprue (1) respectively, then, flow control valve (6) by each sprue (1) is divided into two uniform runners of flow velocity (A), enter in core rod (3) the table groove (4), on core rod (3) surface, have two grooves that vary in size (2) and a damping ring (5) and make plasticizing expect uniformity before compound.Drive adjusting rod (7) realization core rod (8) by 10 type embryo controllers simultaneously and do upper and lower fine motion, thereby get required goods.

10 type embryo controllers mainly are thick by the type germ wall of artificial setting, after the core rod positional information that sensor is sent here, drive the oil cylinder knee-action by servo valve controlled pressure oil and realize.

Fluid enters in core rod (3) groove (2), and little groove (2) is to expect that away from formed the closing of feeding end pressure is set inadequately at it in order to compensate big groove (2).

Embodiment 2

As embodiment 1 described machine, enter the plasticizing material of core rod (3), one the 10 oblique annular groove (4) about degree is arranged on core rod (3) surface, its degree of depth, nearly charging place ratio is away from the dark 2mm of charging place.Then, pass through damping ring.Remaining is identical with embodiment 1.

Claims

1, the multi-layer co-extruded frame head apparatus of a kind of plastics, it comprises charging runner (1) more than two and the multi-layer co-extruded head corresponding with it, it is characterized in that: runner (1) is communicated with the passage that enters head (2) more than two.

2, device according to claim 1 is characterized in that: passage (2) is at the recessed Y-shaped groove (4) that forms in plug (3) surface.

3, device according to claim 2 is characterized in that: the damping ring (5) that annular projection is arranged in the below of groove (4).

4, the described device of a kind of claim 1, it is characterized in that: plug (3) cross section parallel and the mutual decentraction of groove (4) root section with the lip-deep groove of plug (3) (4) root section, and groove (4) corresponding to the groove depth at feeding mouth place greater than groove depth away from the feeding mouth place.

5, device according to claim 4 is characterized in that: the damping ring (5) that annular projection is arranged in the below of groove (4).

6, according to claim 1,2,3 or 4 described devices, it is characterized in that: runner (1) can be divided into the runner (A) more than two, is provided with flow divider valve (6) between runner (1) and runner (A).

7, according to claim 1,2,3 or 4 described devices, it is characterized in that: control pull bar (7) is connected with the core rod (8) of head.