JPS60199627A - Molding die adaptor for multilayer plastic film or the like - Google Patents

Abstract

PURPOSE:To enable the adjusting of the slit setting member position from outside an adaptor as desired by arranging a plurality of slit setting members continuously along a passage for guiding a supply resin while mounted movably at the right angle to the direction of a convergence resin passage. CONSTITUTION:Resins A, B and C fed from resin introduction paths 6, 7 and 8 reach passages 9, 10 and 11 from slit setting members 2 and 3 and the resins A and B of the passages 9 and 10 with the slit setting member 2 converge and flow to a convergence path 12 forming a layer A-B. The resin layer A-B of the convergence path 12 and the resin C of the passage 11 converges with a slit setting member 3 continuously having proper angles of convergence and reach a convergence path 13 forming a layer A-B-C. Thus, the slit setting members 2 and 3 moved at the right angle to the convergence path 13 to adjust the widths of the passages 9, 10 and 11 thereby enabling the changing of the flow velocities of the resins A, B and C.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in die adapters for forming multilayer plastic films or sheets.

Conventional die adapters for molding multilayer plastic films or sheets merely perform the function of merging a plurality of resin flows and guiding them to a die. For this reason, it is necessary to mold resins with extremely different viscosities adjacent to each other, and to obtain products with extremely different thicknesses of adjacent layers.
Freely adjust the pressure and shear rate of the resin in each layer without adjusting the supply source, and continuously limit
It has been impossible to create an internal structure that is easy to stack without any problems and allows for adjustment of the cross-sectional area of the flow path.

The present invention was made in order to solve the above problem, and the present invention is to guide a plurality of supplied resins from both sides or one side by sandwiching a converging resin flow path, to separate the flow of each supplied resin, and to separate the supplied resins from each other to the confluent part. The structure is such that a plurality of slit setting members that form a flow path can be installed in a continuous line along the merging resin flow path, and the slit setting member can be moved in a direction perpendicular to the direction of the merging resin flow path. The position of the slit setting member can be adjusted arbitrarily from the external force of the adapter)↓
Its feature is that it is structured as follows.

Hereinafter, preferred embodiments of the present invention will be described based on the accompanying drawings.

Fig. 1 is a longitudinal sectional view of the Gui adapter according to the present invention, Fig.
The figure is a sectional view taken along the line Z--Z in FIG.

In the figure, reference numeral 1 denotes an adapter body, and on the top and bottom of this, three resin introduction passages 6, 7°8 are formed at a predetermined distance apart from each other in the direction perpendicular to the plane of the paper. Resin introduction path 6, 7.8
The slit setting members 2, 3 are connected to the resin introduction paths 6, 7, .
The adapter body 1 has flow passages 9, 10 and 11, respectively, and a confluence passage 12 of the flow passages 9 and 10. ,
The confluence path 12. Merging channels 13 of the flow channels 11 are continuously formed in the same direction.

On the other hand, a plate 5 is fixed to one side of the adapter main body 1 as shown in the figure, and two upper and lower adjustment ports 4, 4 are inserted into the plate 5, and each adjustment bolt 4, 4 is inserted into the plate 5. The slit setting members 2 and 3 are respectively screwed to one end, and the nuts 14 and 14 are screwed to the other end. Thus, the slit setting members 2 and 3 are pushed and pulled in a direction perpendicular to the direction of the merging channel 13 by operating the adjustment bolts 4 and 4 and nuts 14 and 14'e from outside the adapter body 1. It is adjustable.

Next, the function of this die adapter will be explained.

Resin introduction passages 6, 7. Resin A supplied by El- et al.

B and C are guided by the slit setting members 2 and 3 to flow paths 9, 10, and 11, respectively, and reach the flow paths 9, 10, and 11. ，
The resins A and B of No. 10 are merged to form layers A-Bk, flow into the merge path 12, and are continuously passed through the slit setting member 3 having an appropriate merge angle to flow into the merge path 12. Resin A in channel 11
-B (layers) and C merge to form layers A-B-Ct, and reach the merging path 13.

In the above, if the slit setting members 2 and 3 are moved in a direction perpendicular to the direction of the merging channel 13, each channel 9, 10.
The width of 11 can be adjusted, and each resin A,
The flow rates of B and C can be changed.

In addition, when the resin pressures of each layer are different or when resins with extremely different viscosities are placed adjacent to each other, disturbances occur at the interface between the layers, but by adjusting the slit setting member 2.3, an optimal balance can be achieved. Since all confluence points can be selected, it is possible to form a boundary surface with almost no disturbance.
It becomes possible to obtain a product with uniform thickness of each layer.

Furthermore, since it is possible to reduce the layer thickness of expensive resins to the limit, it is possible to significantly reduce costs without reducing product value, and there is a slit for making these adjustments. It becomes possible to operate the setting members 2 and 3 from the outside of the adapter main body 1 while driving.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of a die adapter according to the present invention, and FIG.
The figure is a sectional view taken along line z-2 in FIG. In the drawing, 1 is an adapter main body, 2.3 is a slit setting member, 4 is an adjustment bolt, 5 is a plate, 6.7.8 is a supply resin introduction path, 9.10.11 is each 1 resin flow path, 12.13 is a confluence path, 14 is a nut, and A, B, and C are resins. Patent applicant Modern Machinery Kashiki Company Representative Patent Attorney Hikaru, Shibu Ishi (and 1 other person)

Claims (1)

[Claims] In a die adapter that merges multiple resins supplied from multiple sources and guides them to a die for molding into a multilayer plastic film or sheet, the multiple resins are fed from both sides or one side with the merged resin flow path in between. A plurality of slit setting members for guiding and separating the flows of each supplied resin and forming all independent flow paths leading to the merging part have a structure that can be installed in a continuous line along the entire merging resin flow path, and the slit setting member A multilayer plastic film, etc., characterized in that the member is mounted so as to be movable in a direction perpendicular to the direction of the merging resin flow path, and the position of the slit setting member can be arbitrarily adjusted from outside the adapter. Die adapter for molding.