WO2016056519A1

WO2016056519A1 - Triple-layer rubber manufacturing apparatus and manufacturing method

Info

Publication number: WO2016056519A1
Application number: PCT/JP2015/078243
Authority: WO
Inventors: 稔齊藤; 智史山崎
Original assignee: 株式会社ロッテ
Priority date: 2014-10-08
Filing date: 2015-10-05
Publication date: 2016-04-14
Also published as: JP6489518B2; JP2016073251A; KR20170066383A

Abstract

　Provided are a manufacturing apparatus and a manufacturing method with which triple-layer rubber can be manufactured efficiently. This triple-layer rubber manufacturing apparatus is provided with an external nozzle 14 and an internal nozzle 15. The external nozzle 14 has an outer layer mouth 17 which is provided at the distal end in the output direction, and which demarcates an outer layer internal space 16 of flattened rectangular shape having a prescribed length in the output direction, and being relatively wide in the width direction orthogonal to the output direction, and relatively thin in the thickness direction. The internal nozzle 15 has an inner layer mouth 20 which demarcates an inner layer internal space 19 of flattened cuboid shape having a prescribed length in the output direction, having a dimension in the width direction orthogonal to the output direction equal to that of the outer layer internal space 16, and having a dimension in the thickness direction substantially equal to one-third that of the outer layer internal space 16. The inner layer mouth 20 is arranged in a central portion of the outer layer mouth 17 in the vertical direction, in such a way that within the outer layer internal space 16 demarcated by the outer layer mouth 17, the internal space is divided into an outer layer upper internal space 16U and an outer layer lower internal space 16D.

Description

Three-layer gum manufacturing apparatus and method

This invention relates to a manufacturing apparatus and a manufacturing method of a three-layer gum.

As an apparatus for producing a three-layer gum, for example, an apparatus disclosed in Patent Document 1 is known. As shown in FIG. 1, the three-layer gum manufacturing apparatus disclosed in Patent Document 1 includes a die 8 attached to the outlet side of the base 25 and a shaping provided in the die 8. When the discharge port 9 and the shaping cylinder 10 are viewed from the front side A side, they have the shape shown in FIG.

Another example of the discharge port is shown in FIG.
Patent Document 2 shows an example of the shape of the nose portion 26 and the opening 34 of the extrusion device in FIGS. 3 and 4.

Japanese Patent No. 2796425 Japanese Patent No. 4951519

When trying to produce a three-layer gum using a conventional production device, it is difficult to produce a three-layer gum with a desired width, or when the three-layer gum is cut into a desired width, an excessive surplus There was a problem that the production efficiency was poor.

The present invention has been made to solve such a problem, and has as its main object to provide a manufacturing apparatus and a manufacturing method capable of efficiently manufacturing a three-layer gum.

Also, an object of the present invention is to provide a manufacturing apparatus and a manufacturing method for efficiently manufacturing a particularly small three-layer gum.

The invention according to claim 1 for achieving the above object is an apparatus for producing a three-layer gum in which a middle-layer gum is sandwiched between a pair of outer-layer gums, and the first gum composition which is a raw material of the outer-layer gum A first path for supplying to the external nozzle, and a second path for supplying the second gum composition, which is a raw material for the middle-layer gum, to the intermediate nozzle, the external nozzle at the tip in the output direction For outer layer that is provided and has a predetermined length toward the output direction, the width direction orthogonal to the output direction is relatively wide, and the thickness direction is relatively thin. The intermediate nozzle has a reduced diameter portion whose inner diameter is narrowed in the output direction, and a distal end of the reduced diameter portion, and has a predetermined length in the output direction. The width direction orthogonal to the direction is the same dimension as the inner space for the outer layer, and the thickness direction is the outer An inner layer mouth portion defining a flat rectangular parallelepiped inner space having a size approximately one third of the inner space, and the inner layer mouth portion is formed by the outer layer inner portion. In the space, the three-layer gum is characterized in that the inner space is arranged at the center in the vertical direction of the outer layer mouth portion so as to divide the inner space into an upper inner space for the outer layer and a lower inner space for the outer layer. Device.

According to a second aspect of the present invention, the middle layer mouth portion has a flat rectangular parallelepiped shape in which an inlet side and an outlet side are opened, and an upper wall, a lower wall, and left and right side walls are partitioned by a metal plate, and the left and right side walls are The apparatus for producing a three-layer gum according to claim 1, wherein the three-layer gum manufacturing apparatus is engaged with an inner surface of the outer layer mouth portion.

According to a third aspect of the present invention, a concave groove for receiving a side wall of the middle layer mouth portion is formed on the inner side surface of the outer layer mouth portion, and the inner side surface of the outer layer mouth portion and the middle layer mouth The apparatus for producing a three-layer gum according to claim 2, wherein the apparatus is flush with an inner side surface of the portion.

The invention according to claim 4 is characterized in that, compared to the outer layer mouth portion, the middle layer mouth portion is located rearward by a certain dimension when viewed in the output direction. It is a manufacturing apparatus of the triple layer gum as described in any one.

According to a fifth aspect of the present invention, the first path is linearly connected to the external nozzle, and an extruder is provided in the first path, and the second path is connected to the middle nozzle in an orthogonal direction. The apparatus for producing a three-layer gum according to any one of claims 1 to 4, wherein an extruder is provided therein.

The invention according to claim 6 includes a plurality of roll pairs for rolling the strip-shaped three-layer gum, and the roll pair on the upstream side in the transport direction of the strip-shaped three-layer gum is a roll as compared with the roll pair on the downstream side in the transport direction. The rotation speed of the peripheral surface is set to be relatively slow, and while the plurality of roll pairs are transferred, the belt-like three-layer gum is given a tension in the transfer direction and the thickness thereof is reduced. An apparatus for producing a three-layer gum according to any one of claims 1 to 5.

The invention according to claim 7 is a linear guide surface that is provided on the downstream side of the plurality of roll pairs and guides one side surface of the rolled belt-like three-layer gum as viewed in the transfer direction of the belt-like three-layer gum. When the width of the rolled strip-shaped three-layer gum is wider than a predetermined width, the strip-shaped three-layer gum is provided at a certain interval in the direction orthogonal to the transfer direction of the strip-shaped three-layer gum with respect to the guide surface. It has a cutter which cut | disconnects the other side surface of this, It is a manufacturing apparatus of the three-layered gum of Claim 6 characterized by the above-mentioned.

In the invention according to claim 8, the strip-shaped three-layer gum provided in the guide surface and the downstream surface side of the cutter and adjusted in width as viewed in the transport direction of the strip-shaped three-layer gum has a constant dimension in the transport direction. The apparatus for producing a three-layer gum according to claim 7, further comprising means for producing a long plate-like semi-product before cutting into a long plate shape to make a final product.

The invention according to claim 9 is a method for producing a three-layer gum, wherein the outlet has a flat rectangular shape that is long in the lateral direction and the center in the vertical direction of the outer layer mouth. A step of preparing an inner layer middle layer mouth portion provided with a predetermined dimension from the outer layer mouth portion and defined by a pair of upper and lower straight lines extending in the lateral direction; and the first gum composition and the second gum composition as the outer layer And a step of co-extruding from the mouth part for the mouth and the mouth part for the middle layer, and a method for producing a three-layer gum comprising a middle layer gum sandwiched between a pair of outer layer gums.

In the invention according to claim 10, the method further comprises a step of rolling a strip-shaped three-layer gum formed by coextrusion, and the other side surface is guided while guiding one side surface of the rolled strip-shaped three-layer gum. The method for producing a three-layered gum according to claim 9, comprising a step of cutting.

The invention described in claim 11 is characterized in that the method further includes a step of cutting the strip-shaped three-layer gum into a plate-shaped three-layer gum semi-finished product having a predetermined length after the cutting step. 10. A method for producing a three-layer gum according to 10.

According to the present invention, a three-layer gum manufacturing apparatus with improved production efficiency can be obtained. Particularly in a small plate-like gum, it is possible to provide a production apparatus and production method suitable for producing a three-layer gum.

FIG. 1 is a perspective view of a three-layer gum 1 according to an embodiment of the present invention. FIG. 2 is a flowchart showing the manufacturing process of the three-layer gum 1 according to one embodiment of the present invention. FIG. 3 is a perspective view showing a state in which a long strip-shaped three-layer gum 12 is output from the nozzle of the main extruder 10 and is conveyed by a plurality of rollers 13. FIG. 4 is a view of the nozzle 11 shown in FIG. 3 as viewed from the front side (output direction side). FIG. 5 is a perspective view showing a state in which the nozzle 11 shown in FIG. 4 is disassembled into an external nozzle 14 and an intermediate nozzle 15. FIG. 6 is a schematic longitudinal sectional view centering on the nozzle 11 portion of the main extruder 10. FIG. 7 is a partial vertical cross-sectional view in side view for explaining the positional relationship between the outer layer mouth portion 17 and the middle layer mouth portion 20. FIG. 8 is a partial longitudinal sectional view in front view for explaining the arrangement and attachment relationship between the outer layer mouth portion 17 and the middle layer mouth portion 20. It is a figure which shows the structural example of the rolling apparatus 40 for performing the rolling process demonstrated as step S7 in FIG. FIG. 10 is a diagram for explaining the thickness sensor 48 and the width sensor 49. FIG. 11 is a diagram schematically showing a configuration of an apparatus for realizing the width adjustment described as step S8 in FIG. FIG. 12 is an illustrative view showing a configuration of the II portion in FIG. FIG. 13 is an illustrative view showing a configuration of a II-II portion in FIG. FIG. 14 is a schematic diagram showing the configuration of the III-III portion in FIG. FIG. 15 is a diagram showing the three-layered gum semi-finished product 6 that has been cut as the semi-finished product described as step S9 in FIG.

Hereinafter, with reference to the drawings, a three-layer gum manufacturing apparatus and method according to an embodiment of the present invention will be described in detail.

FIG. 1 is a perspective view of a three-layer gum 1 according to an embodiment of the present invention. The three-layer gum 1 according to this embodiment is provided as a small plate-like gum as shown in FIG. The present invention provides a manufacturing apparatus and a manufacturing method for manufacturing a small plate-like gum as a three-layer gum.

In FIG. 1, the three-layer gum 1 has, for example, a length L ₀ of 42 mm, a width W ₀ of 12 mm, and a thickness T ₀ of 3 mm.

FIG. 2 is a flowchart showing the manufacturing process of the three-layer gum 1 according to one embodiment of the present invention.
Referring to FIG. 2, in Step S <b> 1, the raw material of the outer layer gum 3 is mixed by a mixer to prepare a first gum composition.

The mixed first gum composition is given to the pre-extruder as step S2, mixed and kneaded, and outputted as a rope-like elongated continuous body. The output rope-like first gum composition is passed through a cooling device (step S3) and cooled to a predetermined temperature, for example, about 40 ° C., and the temperature is stabilized. Then, it is given to one input path (first path) of the main extruder (step S4).

In parallel with the above manufacturing process, the raw material for the middle-layer gum 2 is mixed with a mixer (step S5). The raw materials mixed in the mixer in step S5 are output as the second gum composition and cut into blocks (step S6). The material cut in step S6 is supplied to the other input path (second path) of the main extruder (step S4).

In the main extruder, the first gum composition to be the outer layer gum 3 supplied to the first path is mixed and kneaded using, for example, a biaxial extruder and output from the external nozzle. Simultaneously, the 2nd gum composition used as the middle-layer gum 2 supplied to a 2nd path | route is mixed and knead | mixed, for example with a uniaxial extruder, and it outputs from a middle nozzle.

Specific configurations of the external nozzle and the intermediate nozzle provided in the main extruder will be described later.
From the main extruder, a strip-shaped three-layer gum in which the second gum composition (middle layer gum 2) is sandwiched between a pair of first gum compositions (outer layer gum 3) is output.

The band-shaped three-layer gum is extended to a predetermined thickness in the rolling process (step S7), and the width is adjusted so as to have a width corresponding to the length of the final product in the width adjusting process (step S8).
And the strip | belt-shaped three-layered gum in which the width | variety was adjusted is cut | disconnected to the board shape of a fixed dimension in the transfer direction, and is made into the semi-finished product before making it into a final product (step S9).

Since the width of the semi-finished product is the length L ₀ of the final product, the semi-finished product is cut into a plurality of pieces so as to have the width W _{0 of the} final product in the length direction (step S10). .
The three-layer gum 1 that has been cut and completed is individually packaged (step S11), and the three-layer gum 1 that has been individually packaged is housed in a carton and packaged in a carton (step S12).

FIG. 3 is a perspective view showing a state in which a long strip-shaped three-layer gum 12 is output from the nozzle 11 of the main extruder 10 and is conveyed by a plurality of rollers 13.
FIG. 4 is a view of the nozzle 11 shown in FIG. 3 as viewed from the front side (output direction side). The nozzle 11 includes an external nozzle 14 and an intermediate nozzle 15.

FIG. 5 is a perspective view showing a state in which the nozzle 11 shown in FIG. 4 is disassembled into an external nozzle 14 and an intermediate nozzle 15.
4 and 5, the external nozzle 14 is provided at the distal end portion in the output direction, has a predetermined length toward the output direction, and the width direction orthogonal to the output direction is relatively wide. It has an outer layer mouth portion 17 that divides a flat rectangular parallelepiped outer layer inner space 16 whose thickness direction is relatively thin.

The medium nozzle 15 is disposed in the external nozzle 14. The intermediate nozzle 15 is provided at a reduced diameter portion 18 whose inner diameter is narrowed toward the output direction, and a tip of the reduced diameter portion 18, has a predetermined length toward the output direction, and is orthogonal to the output direction. It has a middle layer mouth portion 20 defining a flat rectangular parallelepiped middle layer inner space 19 whose width direction is the same as that of the outer layer inner space 16 and whose thickness direction is approximately one third of the outer layer inner space 16. .

The middle layer mouth portion 20 is formed in the outer layer mouth portion 17 so as to divide the inner space 16 into an outer layer upper space 16U and an outer layer lower space 16D within the outer layer inner space 16 defined by the outer layer mouth portion 17. It is arranged at the center in the vertical direction.

FIG. 6 is a schematic longitudinal sectional view centering on the nozzle 11 portion of the main extruder 10. Referring to FIG. 6, the main extruder 10 includes a first path 21 for supplying the first gum composition to be the outer layer gum 3 to the external nozzle 14 and the second gum composition to be the middle layer gum 2. And a second path 22 for supplying to the middle nozzle 15.

The first path 21 is linearly connected to the external nozzle 14 and includes, for example, a biaxial extruder 23 therein. The 2nd path | route 22 is connected with the middle nozzle 15 in the orthogonal direction, and is provided with the 1 axis | shaft extruder 24 in the inside, for example. The extruder 24 may be biaxial.

FIG. 7 is a partial longitudinal sectional view in side view for explaining the positional relationship between the outer layer mouth portion 17 and the middle layer mouth portion 20. FIG. 8 is a partial longitudinal sectional view in front view for explaining the arrangement and attachment relationship between the outer layer mouth portion 17 and the middle layer mouth portion 20.

Referring to FIGS. 5 to 8, the middle layer mouth portion 20 has a flat rectangular parallelepiped shape in which an inlet side and an outlet side are opened, and an upper wall 25, a lower wall 26, a left side wall, and a right side wall 28 are partitioned by a metal plate. I am doing. The left side wall and the right side wall 28 of the middle layer mouth portion 20 are engaged with the right inner side surface 30 and the left inner side surface defined by the outer layer inner space 16 of the outer layer mouth portion 17, respectively. More specifically, a concave groove 31 that receives the right side wall 28 of the middle layer mouth portion 20 is formed on the right inner side surface 30 of the outer layer mouth portion 17, and the right side of the middle layer mouth portion 20 is formed in the concave groove 31. The wall 28 is engaged. For this reason, the right inner surface 30 of the outer layer mouth portion 17 and the right inner surface 32 of the middle layer mouth portion 20 are flush with each other (see FIG. 8).

The left side surfaces of the outer layer mouth portion 17 and the middle layer mouth portion 20 have the same configuration.
Further, the front end of the middle layer mouth portion 20 is located rearward by a fixed dimension x as compared with the front end of the outer layer mouth portion 17 as viewed in the output direction (see FIG. 7). The constant dimension x is, for example, 12 mm in this embodiment. By making the middle layer mouth portion 20 slightly rearward, the outer layer and the middle layer of the co-extruded three-layer gum can be brought into close contact and output.

By configuring the outer layer mouth portion 17 and the middle layer mouth portion 20 as described above, the middle layer gum 2 output from the middle layer mouth portion 20 is sandwiched between the pair of outer layer gums 3 output from the outer layer mouth portion 17. The resulting three-layer gum has the effect of being able to output well.

FIG. 9 is a diagram showing a configuration example of the rolling device 40 for executing the rolling process described as step S7 in FIG.

The rolling apparatus 40 includes a plurality of roll pairs, for example, seven roll pairs 41 to 47 for rolling the strip-shaped three-layer gum 12 output from the nozzle 11 of the main extruder 10. Seven pairs of rolls 41 to 47 are arranged along the transfer direction of the strip-shaped three-layer gum 12, and sequentially nip the strip-shaped three-layer gum 12 to transfer from the upstream side to the downstream side.

The rotational speeds of the seven pairs of rolls 41 to 47 are set such that the roll pair on the upstream side in the transfer direction has a relatively low rotation speed on the peripheral surface of the roll as compared with the roll pair on the downstream side in the transfer direction.

For example, assuming that the seven roll pairs 41 to 47 have the same diameter, the rotation speed of the roll pair 41 is V1, the rotation speed of the roll pair 42 is V2, and the rotation speed of the roll pair 43 is Is V3, the rotational speed of the roll pair 44 is V4, the rotational speed of the roll pair 45 is V5, the rotational speed of the roll pair 46 is V6, and the rotational speed of the roll pair 47 is V7.
V1 <V2 <V3 <V3 <V4 <V5 <V6 <V7
It is said that.

In this way, by gradually increasing the rotational speed of the roll pairs 41 to 47 along the transfer direction, the strip-shaped three-layer gum 12 is transferred in the transfer direction while the plurality of roll pairs 41 to 47 are transferred. A tension is applied, and the thickness is gradually reduced.

Referring to FIG. 10, the thickness and width of the strip-shaped three-layer gum 12 output from the nozzle 11 of the main extruder 10 are arranged on the upstream side of the rolling device 40 as viewed in the transfer direction of the strip-shaped three-layer gum 12. A thickness sensor 48 and a width sensor 49 for measurement are provided. The thickness sensor 48 and the width sensor 49 can be realized by a laser sensor using laser light, for example.

Further, a width sensor 59 for measuring the width of the rolled strip-shaped three-layer gum 12 is provided on the downstream side of the rolling device 40 as viewed in the transfer direction of the strip-shaped three-layer gum 12. The width sensor 59 is also realized by a laser sensor.

In the apparatus of this embodiment, the discharge amount of the outer layer gum 3 pushed out from the main extruder 10 is controlled on the basis of the outputs of the thickness sensor 48 and the width sensor 49 provided on the upstream side, and thereby output from the nozzle 11. The thickness and width of the strip-shaped three-layer gum 12 are adjusted to a desired value.

Further, the output of the width sensor 59 provided on the downstream side may be reflected in the control of the discharge amount of the outer layer gum 3 pushed out from the main extruder 10.

Further, based on the output of the width sensor 59, the ratio of the rotational speeds of the seven pairs of rolls 41 to 47 can be controlled to control the final width of the band-shaped three-layer gum 12. Is possible.

FIG. 11 is a diagram schematically showing a configuration of an apparatus for realizing the width adjustment described as step S8 in FIG.
FIGS. 12, 13, and 14 are schematic diagrams showing the configurations of portions II, II-II, and III-III in FIG. 11, respectively.

11 to 14, the width adjusting device is realized by a one-side side cutting device 50. The one-side-side cutting device 50 has a linear guide surface 51 that guides along one side of the rolled strip-shaped three-layer gum 12. The guide surface 51 includes a pair of transport rollers 52 arranged on the upstream side in the transfer direction of the band-shaped three-layer gum 12 and another pair of transport rollers 53 disposed on the downstream side thereof. . The rolled strip-shaped three-layer gum 12 is fed in a state of extending linearly from the pair of transport rollers 52 toward the pair of transport rollers 53. At that time, one side surface of the band-shaped three-layer gum 12 is guided by the guide surface 51, and the position of the one side surface is a predetermined position when viewed in the width direction.

Between the transport roller 52 and the transport roller 53, a receiving roller 57 and a rotary blade 55 that rotates about the rotary shaft 54 are arranged. The rotary blade 55 is spaced from the guide surface 51 by a gap W (the gap W is a dimension equal to the width W required as the width of the rolled belt-like three-layer gum 12), and the belt-like three-layer along the transfer direction. It is provided so that the other side surface side of the gum 12 can be cut.

More specifically, a rotary shaft 54 extends in a direction perpendicular to the guide surface 51, and a rotary blade 55 that extends in a direction orthogonal to the rotary shaft 54 is attached. Therefore, when the other side surface side of the strip-shaped three-layer gum 12 to be conveyed is out of the width W required for the strip-shaped three-layer gum 12 (when the width of the strip-shaped three-layer gum 12 is wider than the required width W), This is a mechanism in which the other side surface is cut by the rotary blade 55.

By controlling the width of the outer layer mouth portion 17 and the middle layer mouth portion 20, the rolling amount of the rolling device 40, and the width of the strip-shaped three-layer gum 12 detected by the width sensor 59, as the overall system design. It is theoretically possible to control the width of the rolled strip-like three-layer gum 12 to the required constant width W. However, in actual production, the width W ′ of the rolled strip-like three-layer gum 12 tends to be wider or narrower than the required predetermined width W. Therefore, the one-side side cutting device 50 functions as necessary, the other side surface of the band-shaped three-layer gum 12 is cut by the

rotary blades

55 and 57, and the width of the band-shaped three-layer gum 12 is adjusted to a predetermined width W. . Specifically, the width W ′ of the band-shaped three-layer gum 12 is intentionally made wider, and the other side surface side of the band-shaped three-layer gum 12 is cut by the one-side side surface cutting device 50 to adjust to the predetermined width W.

FIG. 15 shows the three-layered gum semi-finished product 6 that has been cut as the semi-finished product described as step S9 in FIG. 2 (step S9).

As shown in FIG. 15, the three-layered gum semi-finished product 6 has a dimension W in the short direction that is the length L ₀ of one final product. The dimension L in the longitudinal direction of the three-layer gum semi-finished product 6 is a length (L = W) in which the semi-finished product 12 is cut into, for example, n (n is an arbitrary natural number) final product (three-layer gum 1). ₀ × n).

By cutting the strip-shaped three-layer gum 12 rolled in this way into a semi-finished product as an intermediate stage of production, the yield in the cutting of the final product, individual packaging and carton packaging is improved, and the efficient three-layer gum Can be manufactured.

In the description of the above embodiment, the production apparatus has been described with respect to the production of the three-layer gum. However, the rolling device 40 and the one-side-side cutting device 50 in the production apparatus are not limited to the production of the three-layer gum, It can also be applied to the production of plate gum.

The present invention is not limited to the contents of the embodiment described above, and various modifications can be made within the scope of the claims.

DESCRIPTION OF SYMBOLS 1 Three-layer gum 2 Middle-layer gum 3 Outer-layer gum 6 Three-layer gum semi-finished product 10 Main extruder 11 Nozzle 12 Strip-shaped three-layer gum 13 Roller 14 External nozzle 15 Medium nozzle 16 Inner space for outer layer 16U Upper inner space for outer layer 16D For outer layer Lower inner space 17 Outer layer opening 18 Reduced diameter portion 19 Middle layer inner space 20 Middle layer opening 21 First path 22 Second path 23 Two-axis extruder 24 Single-axis extruder 25 Upper wall 26 Lower wall 28 Right wall 30 Right inner surface 31 Concave groove 32 Inner surface 40

Rolling device

41, 42, 43, 44, 45, 46, 47 Roll pair 48 Thickness sensor 49 Width sensor 50 The device is realized by a one-side side cutting device 50.
51

Guide surface

52, 53, 57 Conveying roller 54 Rotating shaft 55 Rotating blade 59 Width sensor

Claims

An apparatus for producing a three-layer gum in which a middle-layer gum is sandwiched between a pair of outer-layer gums,
A first path for supplying a first gum composition that is a raw material of the outer layer gum to an external nozzle;
A second path for supplying the second gum composition, which is a raw material of the middle-layer gum, to the middle nozzle,
The external nozzle is provided at the distal end in the output direction, has a predetermined length in the output direction, is a flat rectangular parallelepiped having a relatively wide width direction orthogonal to the output direction and a relatively thin thickness direction. Having an outer layer mouth portion that divides the inner space for the outer layer,
The middle nozzle is provided with a reduced diameter portion whose inner diameter is narrowed toward the output direction, and a width direction that is provided at a tip of the reduced diameter portion, has a predetermined length toward the output direction, and is orthogonal to the output direction. Has the same dimension as the inner space for the outer layer, and has a middle layer mouth portion that defines a flat rectangular parallelepiped inner space for the inner layer whose thickness direction is approximately one third of the inner space for the outer layer,
The middle layer mouth portion is arranged in the vertical direction of the outer layer mouth portion so as to divide the inner space into an outer layer upper inner space and an outer layer lower inner space in the outer layer inner space defined by the outer layer mouth portion. An apparatus for producing a three-layer gum, characterized in that it is arranged in the center.
The middle layer mouth portion has a flat rectangular parallelepiped shape in which an inlet side and an outlet side are opened, and an upper wall, a lower wall, and left and right side walls are partitioned by a metal plate,
The apparatus for producing a three-layer gum according to claim 1, wherein the left and right side walls are engaged with an inner surface of the outer layer mouth portion.
On the inner side surface of the outer layer mouth portion, a concave groove for receiving the side wall of the middle layer mouth portion is formed,
The apparatus for producing a three-layer gum according to claim 2, wherein an inner side surface of the outer layer mouth portion and an inner side surface of the middle layer mouth portion are flush with each other.
The three-layer mouth portion according to any one of claims 1 to 3, wherein the middle-layer mouth portion is located rearward by a certain dimension in the output direction as compared with the outer-layer mouth portion. Layer gum production equipment.
The first path is linearly connected to the external nozzle, and includes an extruder inside thereof.
The three-layer gum production according to any one of claims 1 to 4, wherein the second path is connected to the middle nozzle in an orthogonal direction and includes an extruder inside the second path. apparatus.
It is provided with a plurality of roll pairs for rolling the strip-shaped three-layer gum, and the roll pair on the upstream side in the transport direction of the strip-shaped three-layer gum has a relative rotational speed of the roll peripheral surface as compared with the roll pair on the downstream side in the transport direction. Is set to late,
The belt-like three-layer gum is tensioned in the transport direction and the thickness thereof is reduced while the plurality of roll pairs are transported, according to any one of claims 1 to 5. Three-layer gum manufacturing equipment.
A linear guide surface that guides one side surface of the rolled strip-shaped three-layer gum provided on the downstream side of the plurality of roll pairs as seen in the transport direction of the strip-shaped three-layer gum;
When the width of the rolled strip-like three-layer gum is wider than a predetermined width, the guide-face is provided with a certain interval perpendicular to the transport direction of the strip-like three-layer gum. A cutter for cutting the other side surface;
The apparatus for producing a three-layer gum according to claim 6, wherein
The strip-shaped three-layer gum provided on the downstream side of the guide surface and the cutter as viewed in the transport direction of the strip-shaped three-layer gum and having a width adjusted is cut into a long plate shape having a fixed dimension in the transport direction. The apparatus for producing a three-layer gum according to claim 7, further comprising means for creating a long plate-shaped semi-finished product before making it into a final product.
A method for producing a three-layer gum comprising:
The outlet is an outer layer mouth portion having a flat rectangular shape that is long in the lateral direction,
A step of preparing an inner layer middle layer mouth portion provided at a center in the vertical direction of the outer layer mouth portion by a certain distance from the outer layer mouth portion and defined by a pair of upper and lower straight lines extending in the lateral direction;
Co-extruding the first gum composition and the second gum composition from the outer layer mouth portion and the middle layer mouth portion;
A method for producing a three-layer gum comprising a middle-layer gum sandwiched between a pair of outer-layer gums.
The method further comprises:
Rolling a strip-shaped three-layer gum formed by coextrusion;
Cutting the other side as needed while guiding one side of the rolled strip-shaped three-layer gum; and
The method for producing a three-layer gum according to claim 9, comprising:
The method further comprises:
The method for producing a three-layer gum according to claim 10, comprising a step of cutting the strip-shaped three-layer gum into a plate-shaped three-layer gum semi-finished product having a predetermined length after the cutting step.