JPH065145Y2 - Introductory metal fittings for compound extrusion - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is an apparatus for manufacturing a plastic thin film body, and in particular, a combination of different kinds of plastic materials (hereinafter referred to as resin materials) sent from a plurality of extruders, and pressure bonding. The present invention relates to an introduction metal fitting applied to an apparatus for manufacturing a plastic thin film body to be laminated.

(Prior Art) FIGS. 3 and 4 show a conventional apparatus for manufacturing a plastic laminated thin film body, and 21 is a metal fitting for distribution which is melted and kneaded by different extruders (not shown). There are attached conduits 22 to 24 for introducing a resin material of a kind. Reference numeral 25 is an introduction fitting for introducing the resin material introduced into the distribution fitting 21 from the conduits 22 to 24 into the pressure equalizing lateral holes 29 to 31 via the resin passages 26 to 28, respectively. The equalizing lateral holes 29 to 31 are provided in the width direction of the introduction metal fitting 25 substantially at right angles to the flow of the resin material and corresponding to the number of the conduits 22 to 24, and are caused by the flow of the melted resin material. In addition to relieving distortion and the like, the length in the width direction is expanded in the width direction in a desired laminated state after the resin material laminated in the introduction metal fitting 25 enters the die 42,
The width of the outlet 35 that is suitable for being discharged from the slit-shaped outlet 43 is secured. 32 to 34 are the horizontal holes for pressure equalization
A resin flow rate adjusting piece provided in the middle of the resin passages 36 to 38 communicating from 29 to 31 to the outlet 35 of the introduction fitting.
They are provided at appropriate intervals over the entire widths of 36 to 38, and push and pull bolts 39 to 41 respectively to adjust the flow rate of the resin material passing through the resin passages 36 to 38.

With the above configuration, the following operational effects are obtained.

(1) The distribution of each resin layer in the laminated thin film body can be made accurate by the introduction metal fitting 25, and the resin material is introduced between the conduits 22 to 24 for transferring the resin material and the introduction metal fitting 25 in the introduction metal fitting 25. Distributing metal fitting 21 for distributing to the resin passages 36 to 38 of
Therefore, even when the arrangement of the resin layers of the molded product is changed, or when it is desired to stop the flow of a certain resin layer, it is only necessary to replace the distribution metal fitting 21 to replace the resin passages 36 of the introduction metal fitting 25. By adjusting the flow rates of Nos. 38 to 38, the arrangement of each layer can be easily changed and the discharge of a certain layer can be stopped, the thickness of each layer can be controlled, and it is not necessary to replace the expensive die 42 or the introduction fitting 25.

(2) Since the outlet shape of the introduction fitting 25 is relatively wide, after the resin enters the die 42 from the introduction fitting 25, it does not change abruptly while going to the wide slit-shaped exit of the die 42, Laminar flow is not disturbed, distortion does not occur in molded products, and products with excellent physical properties can be made.

(3) The distribution state of the laminated resin at the introduction fitting outlet 35 can be changed by the resin flow rate adjusting pieces 32 to 34 of the resin passages 36 to 38 provided in the introduction fitting 25.

(Problems to be solved by the invention) On the other hand, in addition to the above-mentioned effects, in the above-mentioned conventional device, as is clear from FIGS.
The width of 35 parts cannot be made sufficiently large due to the structure.Therefore, in order to widen the width and make each layer thickness of the resin laminate discharged from the die slit outlet 43 uniform, It is necessary to adjust the laminated state (distribution of thickness of each layer in the width direction) at the outlet 35 of the metal fitting 25 according to the layer configuration, the viscosity difference of each layer resin, each layer thickness ratio, the width expansion ratio, and the like.

However, in the adjusting pieces 32 to 34 having a constant cross-sectional shape in the entire cross section as shown in FIG. 3, sufficient flexibility cannot be obtained in the width direction of the resin passage due to the narrow piece width. , It is difficult to sufficiently adjust the laminated state of the resin at the location of the outlet 35 of the introduction metal fitting 25, if necessary, so that each layer thickness of the laminated body at the die slit outlet 43 is made uniform, and a good ratio with each predetermined layer thickness is obtained. Obtaining a laminate is extremely difficult.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an introduction metal fitting that has sufficient flexibility even with a narrow piece width and can easily partially adjust the cross section of the resin passage in the width direction. is there.

(Means for Solving the Problems) Therefore, the present invention is arranged between the conduits of a plurality of extruders and the molding-like die, and joins a plurality of resin passages from each extruder to separate each resin material. In the introduction metal fitting which is sent to the die in a laminated state, a resin flow rate adjusting piece having a plurality of notches in the width direction and screw holes provided at the ridges between the notches is provided in each of the resin passages. In order to solve the problem, bolts that are inserted over the width and screwed into the threaded holes of each of the crests, and that can rotate but do not move in the axial direction are supported by the introduction metal fittings. Is the means of. (Operation) When it is desired to reduce or increase the resin flow rate at a certain portion of the slit S in the resin flow path in the introduction metal fitting, the bolt at that portion is rotated right or left, so that the resin flow rate adjusting piece Since the rigidity of the cut portion is small, the lower part of the bolt of the resin flow rate adjusting piece is pushed or pulled up toward the slit S with the cuts on both sides of the bolt as boundaries. Therefore, the gap distribution in the width direction of the slit S can be appropriately adjusted, and the flow rate distribution of the resin can be easily adjusted to a desired state. This makes it possible to adjust the thickness ratio of each layer at the die exit and the thickness distribution in the width direction to a predetermined state even if the flow changes due to the difference in the multilayer resin raw material.

(Embodiment) The present invention will be described below with reference to embodiments of the drawings. FIGS. 1 and 2 show first and second embodiments of the present invention. First, in FIG. 1, 25 is disposed between the conduits of a plurality of extruders (not shown) and the molding die, and a plurality of resin passages 3 from each extruder (36, 37, 38 shown in FIG. 3). Is a lead-in metal fitting for sending the resin materials in a laminated state to the die. The resin flow rate adjusting piece 1 is inserted into the resin passage 3 over the entire width of the passage 3, and the lower surface and the resin passage A slit S serving as a resin flow path is formed between the wall surfaces of 3.

Further, the resin flow rate adjusting piece 1 has a plurality of notches F in the width direction.
And in the screw hole of the mountain portion 4 between the notches F,
The screw portion of the bolt 39 is screwed. The large diameter portion 39 'of the bolt 39 is inserted into the hole 5 of the holding portion 25' integrated with the introduction fitting 25 so that it can rotate but cannot move in the axial direction. The present invention is based on A-A shown in FIG.
It is applied to BB and CC parts.

Next, the operation will be described. First, when the bolt 39 of a certain portion is rotated, the bolt 39 cannot move in the axial direction. Therefore, the lower surface of the ridge portion 4 of the adjusting piece 1 at that portion has cuts F, F on both sides of the ridge portion 4 on both sides. Has a low rigidity, so that it is pushed or pulled up toward the slit S.
This makes it possible to appropriately adjust the gap distribution of the slit S in the width direction.

That is, in the above structure, the adjusting piece 1 is adjusted by the bolt 39.
Is adjusted to adjust the total flow rate in the slit S, and the adjustment piece 1 is partially adjusted by an arbitrary bolt 39.
The push-pull adjustment is performed to appropriately adjust the gap distribution in the width direction of the slit A. In this way, by adjusting the flow rate distribution of the resin in the slit S, the laminated state (thickness ratio in the width direction of each layer) of the resin laminated body at the outlet 35 of the introduction fitting 25 shown in FIG. A desired state can be set according to the thickness ratio, the width expansion ratio, etc., and the layer thickness is made uniform in the width direction at a predetermined layer thickness ratio at the die slit outlet 43 shown in FIG. To enable.

In the above-mentioned embodiment, the resin passage surface of the adjusting piece 1 is formed flat, but in the other embodiment shown in FIG. 2, the resin passage surface of the adjusting piece 2 has a curved surface or a combination of a flat surface and a curved surface. By appropriately processing into a special shape such as, the adjustment for obtaining a predetermined laminated state at the inlet fitting outlet 35 shown in FIG. 3 is made easier.

(Effect of the Invention) As described in detail above, in the present invention, when it is desired to reduce or increase the resin flow rate in a certain portion of the slit S in the resin flow path in the introduction fitting, the bolt in that portion is set to the right. Or, when rotated to the left, the rigidity of the cut portion of the resin flow rate adjusting piece is small, so the lower part of the bolt of the resin flow rate adjusting piece is pushed toward the slit S with the notches on both sides of the bolt as boundaries. It will be pulled up. Therefore, the gap distribution in the width direction of the slit S can be appropriately adjusted, and the flow rate distribution of the resin can be easily adjusted to a desired state. This makes it possible to adjust the thickness ratio of each layer at the die exit and the thickness distribution in the width direction to a predetermined state even if the flow changes due to the difference in the multilayer resin raw material.

[Brief description of drawings]

FIG. 1 is a sectional view of a composite extrusion introducing fitting showing a first embodiment of the present invention, FIG. 2 is a sectional view of a composite extrusion introducing fitting showing a second embodiment of the present invention, and FIG. The cross section of the introduction metal fitting for composite extrusion is shown, and the II-II cross section of FIG. 4 and FIG.
It is a partial cross section top view of a figure. Description of the main parts of the figure 1,2 …… Adjustment piece 25 …… Introduction fitting 35 …… (Introduction fitting) Outlet 36 to 38 …… Resin passage 42 …… (For molding) Die F …… Incision S …… Slit

Claims (1)

[Scope of utility model registration request] 1. An introduction fitting disposed between conduits of a plurality of extruders and a molding die, joining a plurality of resin passages from each extruder, and sending each resin material in a laminated state to the die. In, the resin flow rate adjusting piece having a plurality of notches in the width direction and having screw holes in the crests between the notches is inserted over the entire width of each of the resin passages, and A composite extrusion introducing metal fitting, wherein a screw portion is screwed into a screw hole of the portion, and a bolt that can rotate but does not move in the axial direction is supported by the introducing metal fitting.