JPS5887022A - Die for molding multi-colored film - Google Patents

Abstract

PURPOSE:To obtain a titled die through which a dappled sheet can be efficiently obtained and the position or arrangement of the dapple can be readily changed, by providing a merging guide die between double concentric cylinder resin channel and a single circular merging resin channel that is positioned downstream of the concentric cylinder resin channel. CONSTITUTION:Inner and outer resin channels 11, 12 are concentrically arranged, and a merging resin channel 15 that is concentrical with the channels 11, 12 is positioned downstream of the channels 11, 12 and is formed with an annular outlet 16. A merging guide die 17 in the shape of a toroidal disc is positioned between the inner and outer resin channels 11, 12 and the merging resin channel 15, and the resin channels 11, 12 are in communication with the resin channel 15 through a group of inner communication small bores 18 and a group of outer communication small bores 19.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a die for producing a film having two or more different colors (including transparency) in a linear form when producing a film strip by an inflation method.

In particular, it is used for manufacturing sheets for mask decoration, imitation bamboo leaves and leaf orchids used for sushi, valve cylinders, etc.

Conventionally, in the above-mentioned imitation bamboo leaves and between leaves, 2 to 3 i
A monochromatic green sheet with a linear pattern for each +w is used by punching it into the shape of a bamboo leaf or interleaf shape.

However, these natural plants are not monochromatic (they are variegated in pale green or ivory color, or have a highly prized IlA color), and imitation decorative leaves are also produced at restaurants. This is a long-awaited product in the catered lunch box industry, but in the past, monochromatic imitation decorations had to be used due to the lack of processing technology.

This invention was made in response to the above-mentioned demands of customers in the food and beverage industry, etc., and has the efficiency of manufacturing multi-layer single-color sheets, the ability to easily manufacture variegated sheets with almost no problems, and The objective is to provide the market with a die that can be easily changed in the location of variegation and in the placement.

This invention consists of at least two inner and outer cylindrical resin paths connected to the discharge ports of separate extruders, and an annular blowout port on the downstream side of these channels and an upstream end of the blend flow resin path. In the middle of the end, there is a donut-shaped merging guide die or other die members that can be exchanged with other die parts. Therefore, 96 holes are made in any one of the resin paths of No. 1, and the downstream ends are all opened on the same circle of the merging resin path. Groups of holes are arranged in a ring shape, approaching each other as appropriate over the entire circumference. This is a die for molding multi-color films that is difficult to use.

The present invention will now be described based on the exemplary implementation order shown in the drawings.

In the figure, numeral 10 is a die for manufacturing a film by the inflation method, and double cylindrical resin paths 11.12 are provided on the inner and outer concentric circles (6), and both of these resin paths 11.12 are Each has a feed 013.14 which can be connected to the outlet of an independent extruder (not shown). 15 is the inner and outer resin path 1'
1, 12 is a single convergent resin passage of the same shape, the most downstream end thereof forming an annular outlet 16, and this confluence resin passage 15 is also connected to the inside and outside. It is a concentric circle with the 2X resin path 11.12. This merging resin path 15 is such that the resin does not become a turbulent flow and maintains a no-flow state (
Something that flows is better.

A merging guide die 17 in the shape of a donut scale is provided at a position between the two inner and outer resin paths 11, 12 and the merging resin path 15, and the outer diameter of this merging guide die 17 is larger than that of all the resin paths. , that is, it has a larger diameter than the position of the outer resin passage 12, and the inner diameter is smaller than all the resin passages, that is, the inner diameter
11 has smaller dimensions than the MFi path 11.

The upstream end face of this merging guide die 17 is made of inner and outer resin Nr11.
．． 12, and the downstream end surface is provided in contact with the upstream end of the confluent resin path 15, and the upstream end of the flow guide die 17 opens to the inner resin i$11, and the downstream end The inner communicating small hole group 18 penetrates the merging guide die which opens into the merging resin passage 15, and the merging system inner die whose upstream end opens into the outer fat-falling passage 12 and whose downstream end opens into the merging resin passage 15. A penetrating outer communicating hole #19 is drilled, so that the inner and outer communicating hole groups 18.19 are arranged on the same circle as the merging resin path 15 over the entire circumference on the downstream side. The upstream end of the inner communicating small hole group 18 is formed at the same radial position as the inner resin passage 11.

In the illustrated example, each of the above-mentioned internal and external communication small hole groups 18 and 19 has the same diameter, but it is possible to provide holes with partially different diameters, or to have elongated holes in the circumferential direction. Even if they were set up, there would be no change in this idea.

The inner and outer communication holes W18, 19 may be arranged regularly every two or every six, or may be arranged irregularly. Several merging guide dies 17 with different arrangement of these two types of connecting hole groups 18 and 19 and the same inner and outer diameter and thickness are prepared.

The method of using the device of this invention includes the following steps:
When the discharge ports of independent extruders are connected to the extruders and synthetic resins of different colors are supplied to each extruder, bath-resins of different colors are supplied to the resin paths 11 and 12 of 2 m inside and outside. , the resin supplied to the inner resin path 11 passes through the inner connecting hole group 1B and enters the merging resin path 15, and the resin in the outer resin path 12 passes through the outer connecting hole #19 to the merging resin path 15. The two types of molten resins with different colors that flowed in sequentially merged with the adjacent resin flow, formed a tube without being disturbed in the circumferential direction, and then exited from the outlet 16 to become a variegated tube. The film is extruded and inflated.

When it is desired to change the arrangement of the variegation, the extruder is stopped, the merging guide die 17 is removed from the die 10, the merging guide die 17 of a different arrangement is assembled, and the extruder is operated again.

In the case of this inflation tube constructed as described above, it is possible to manufacture one inflation tube partially or entirely with variegation, for example, if each series is made of 2°5 shoulder The width of the streaks of variegation when exiting the air outlet 16 can be manufactured to a minimum of about 2.5 mm (dimension at the air outlet position).

Further, by using a merging guide die 17 whose arrangement, width of the mottled line, and interval are different, other mottled lines can be manufactured. In particular, those with a regular arrangement of internal and external communication holes, mis, 19, will have a circular pattern, and those with irregular ones will be processed into imitation decorative leaves.

It exhibits an appearance that is more similar to natural plant leaves, and it is possible to produce a film that meets these purposes.

In the illustrated example, resin f! 11.12 explained the 2M model, but the 3M model uses 6 extruders at 3N, and the merging guide die 17 can also communicate with each resin path.
A variegated film with 3 colors can be produced by using a J hole group.

In this device, it is preferable to use resins supplied to the extruder that are the same in terms of particle quality, with only pigments or fillers of different colors mixed in (7), but resins with different transparency, It is also possible to use one in which one of the resins is completely transparent.

If all the communicating small hole groups 18.19 have the same diameter, which one of the inner and outer connecting small hole groups 18.19 will result in zero strength distribution on the merging guide die 1 or uniform thermal deformation over the entire circumference. If one of the holes is made larger or has a longer hole, it is easier to remove the resin that is clogging the IC with the larger hole diameter when cleaning the merging guide die 17, and it is also possible to change the color or change to single color molding. In some cases, the steps involved in the setup are simplified.

[Brief explanation of drawings]

The figures show things according to the present invention, and Figure 111 is a half-cut longitudinal vertical sectional side view of an inflation die;
Figure 5 is an fR view showing an example of a variegated imitation leaf used for bento boxes, sushi, etc. In the diagram, 10... Inflation dice, 11...
...Inner resin path, 12...Outer resin path,
(8) 13.14... Supply port, 15... Merging resin path, 16... Air outlet, 17...
...merging guide die, 18...inner contact/J%
Hole group, 19...Outer communication/j% hole group. Patent applicant Gufco Co., Ltd. New Kansai Chemical Industry Co., Ltd.

Claims (7)

[Claims] (1) At least double inner and outer cylindrical resin paths connected to the discharge ports of separate extruders, and a concentric circle with the plurality of inner and outer resin paths downstream from these and connected to an annular outlet. A cylindrical confluent resin channel is provided,
A doughnut-shaped merging/inner die or other die member is provided between the downstream end of the plurality of inner and outer resin paths and the upstream end of the merging resin path, and the merging guide die has a merging guide die. The groups of communication holes, which are opened either at the upstream end or in the plurality of resin paths, and at the downstream end, are all opened on the same circle of the merging resin path, are arranged in an appropriate order over the entire circumference, and are very close to each other. A multi-color film forming die characterized by being arranged in an annular shape. (2) The multi-color film molding diamond according to claim 1, wherein the connecting hole groups are arranged in a particularly regular order for each of the plurality of cylindrical resins. (3) The multi-color film molding die according to claim 1, wherein the connecting hole groups are arranged in an irregular order for each of the plurality of cylindrical resins. (4) The multi-color film forming die according to item 1 of the Patent FF claim, wherein the shapes of the small hole groups are all the same hole diameter. (5) The multi-color film forming die according to claim 1, wherein the shape of the front ID small hole screen includes an arc-long hole in the circumferential direction. (6) The multi-color film molding die as set forth in claim 4, wherein the inner and outer multiple resin paths are one of 2N and 3. (7) The die for forming a multi-color film according to claim 1, wherein the donut-shaped merging guide die is formed by a combination of several wide-spread split dies.