KR101251122B1 - Extrusion dies and pipes are made thereof - Google Patents

Abstract

PURPOSE: An extrusion dice and a pipe manufactured thereby are provided to improve the fragile part of the side surface due to a torpedo line being generated to a step type and not to a linear type. CONSTITUTION: A torpedo(56) of an extrusion dice is a crossed duplex-type form. A cross section of a protrusion part is a step type. A starting point is different to be divided while an extrudant material in the melting state passes through the torpedo and the meeting point is different. One introduction part and a deduction part are formed with a layer structure where both sides of the using surface contacted to the extrusion fluid correspond to each other.

Description

Extrusion dies and pipes are made thereof

The present invention relates to an extrusion die and a tubular body manufactured therefrom, and more particularly, to a point where the molten extruded material is different from and meets the starting point where the molten extruded material splits in the topedo without being interfered with each other. Extrusion die and tubular body manufactured therefrom which can improve the tensile strength by improving the side weakness of the pipe by combining the stepped extruded materials by installing a multi-layered toffee diagram that is crossed up and down to smoothly improve the flow. It is about.

Extruder is a molten state by heating the molding material, and then presses the molding material in the molten state by using a screw and passes it through a die of a specific shape, thereby continuously forming products having the same cross-sectional shape as the extrusion flow path of the die. A die, which is one of the components of an extruder, refers to a mold used for plastic processing of molding materials during extrusion.

The die is spaced between the outer die (die) and the inner die (內 die) to form an extrusion flow path to form an extrusion flow path therein as shown in Figure 1, wherein the extrusion flow path between the outer die and the inner die To be formed, a component called torpedo 56 must be installed as a configuration to allow these dies to be spaced apart. The toffee is disadvantageous to the rigidity of the molded product by forming a boundary line in the extruded material in the course of the molten extrusion material passes through the toffee. However, since it is not possible to remove the toffee from the dice, it is necessary to increase the binding speed of the boundary portion generated by the toffee in the state where the toffee is installed, but this has not been conventionally done.

In the related art, as shown in Patent Application No. 10-0703864 (March 29, 2007), as shown in FIG. 2A, the introduction portion 560 of the toffee 56 of the extrusion die 10 is gradually toward the rear. It is gradually expanded form, the lead portion 570 includes a form that is gradually reduced toward the rear, the introduction portion 560, at least any one of the lead portion 570 is in contact with the extruded fluid Extrusion dies are disclosed, characterized in that they have a layered structure in which the surfaces are opposed to each other, but after the molten extruded material is separated from the topido tip, which is the same starting point, the rear end of the topido which is the same end point. 에서) in the meeting, the interference between the extruded materials when the meeting occurs, the phenomenon that the extruded material passing through the topido is disturbed. As a result, the side portions of the thus formed tubular body became fragile, causing problems such as poor tensile yield strength.

Therefore, there is a need for the development of a technology for a new extrusion die and a tube manufactured therefrom to improve the above problems.

The present invention has been made to solve the above-described problems, and the topedo (torpedo) has a top and bottom staggered structure of the two-layer structure, the difference between the starting point where the molten extruded material is different from the starting point where it splits in the topido It is an object of the present invention to provide an extrusion die and a tubular body produced therefrom for smoothly improving the flow without being interfered with each other.

The present invention for solving the technical problem of the present invention

The introduction portion of the toffee 56 is gradually enlarged toward the rear, and the lead portion has a form that gradually decreases toward the rear, wherein the introduction portion, at least one portion of the lead portion is in contact with the extrusion fluid In the extrusion die 10 having a corresponding layered structure, the toffee 56 provides an extrusion die, characterized in that the upper and lower layers are staggered with each other.

In another aspect, the present invention provides an extrusion die, characterized in that the cross section of the protrusion of one side of the use surface of the introduction portion and the lead portion is stepped.

Finally, the present invention provides a tubular body characterized in that it is manufactured to have a stepped string 66 by the extrusion die.

The extrusion die according to the present invention and the tubular body produced therefrom,

First, the molten extruding material passes through the top and bottom of the multi-layered toffee layer to improve the fragile side of the side by generating the line by the toffee line in the extruded tube without the straight line. can do.

Second, by improving the bonding strength of the molten extrusion material, the tensile yield strength and hot break pressure creep resistance of the molded tube can be improved to improve the reliability of the product.

1 is a block diagram of an extrusion die according to the prior art
2A is a perspective view of a toffee diagram in accordance with an embodiment of the prior art
Figure 2b is a plan view of a toffee diagram according to an embodiment of the prior art
Figure 2c is a cross-sectional view of the tube formed of a line topido line by topido in accordance with an embodiment of the prior art
3A is a perspective view of a toffee diagram according to an embodiment of the present invention;
3B is a plan view of a toffee island in accordance with an embodiment of the present invention.
3C is a side view of a toffee diagram according to an embodiment of the present invention;
Figure 3d is a cross-sectional view of the tube formed of a line topido line by topido in accordance with an embodiment of the present invention

The present invention is an extrusion die in the configuration of the extruder, the molten state of the extruded material is different from the starting point of the splitting in the torpedo (torpedo) to meet the difference between the up and down so as to smoothly improve the flow without interference Extrusion dies and pipes manufactured therefrom that can improve the physical properties such as tensile yield strength and hot-pressure creep resistance by improving the lateral weakness of the pipe by combining the extruded materials in a staircase shape by installing a multi-layered toffee diagram. It is about.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Extrusion die according to the present invention is different from the configuration of the extrusion die of the prior art [FIG. 1] only the toffee 56, the remaining configuration is the same as [FIG. 1], the extrusion die 10 according to the present invention ), The front dice 20, the intermediate dice 30, and the rear dice 40 are connected in-line as in the prior art [FIG. 1].

The front die 20 is composed of a front outer die 22 and a front inner die 24, and an outer shell for extruding the outer shell 62 of the tubular body 60 between the front outer die 22 and the front inner die 24. A flow passage 26 is formed, and an endothelial flow passage 28 for extruding the endothelial 64 of the tubular body 60 is formed inside the front inner die 24.

The intermediate die 30 is composed of an intermediate outer die 32 and an intermediate inner die 34, and the sheath flow passage 26 and the endothelial flow passage 28 are joined between the intermediate outer die 32 and the intermediate inner die 34. A joining flow passage 36 is formed.

The tip of the intermediate inner die 34 is provided with a cone (without reference numeral) for branching the endothelial flow passage 28 formed inside the front inner die 24.

When the position of the second variable external die is variable, the inner shell 64 of the tubular body 60 can adjust the thickness of the conduit passage 36 to be wider or narrower, and the thickness of the outer shell 62 can be adjusted. If the position of the first variable outer die in the die 20 is variable, it is possible to adjust the spacing of the outer skin channel 26 to be wide or narrow. That is, since the outer shell 62 is already controlled in the front die 20, when the confluence passage 36 is adjusted, the thickness of the inner shell 64 is relatively adjusted. The intermediate dice 30 and the rear dice 40 are connected by a topido assay 50, and the topido assay 50 connects the intermediate dice 30 and the rear dice 40. It has a topido body 52, the inside of the topido body 52 is formed in the annular communication passage 54 in communication with the confluence passage 36, the interior of the communication passage 54 Toffee 56 for maintaining the spacing of the communication flow path is formed integrally with the topido body 52.

As shown in FIG. 3A, the introduction portion 560 of the toffee 56 is gradually enlarged toward the rear, and the lead portions 570 and 570 ′ are gradually reduced toward the rear. The introduction parts 560 and 560 'and the lead-out parts 570 and 570' have a multilayer structure that is connected to each other up and down.

Accordingly, the introduction portions 560 and 560 'and the lead portions 570 and 570' of the toffee 56 according to the present invention are different from the one in which the prior art has one layer structure as shown in [FIG. 2A] [FIG. 3A. ], As shown in Fig. 3c], a two-layered structure in which the upper and lower two are coupled, which differs in that the upper one is staggered to the right than the lower one.

3A is a perspective view of a toffee diagram according to an embodiment of the present invention, FIG. 3B is a plan view of a toffee diagram according to an embodiment of the present invention, FIG. 3C is a side view according to an embodiment of the present invention, and FIG. 3D is The cross-sectional view of the tubular body in which a line is formed in a toffee line by the toffee degree of this invention is shown.

As shown in FIGS. 3A to 3C, the multilayered toffee diagram of the exemplary embodiment is a multilayered toffee diagram in which the introduction portions 560 and 560 'and the lead-out portions 570 and 570' are connected up and down. The upper portion 580 is formed to be staggered to the right than the lower portion at which the fixing surface 580 ′ is formed.

This multi-layered topido is formed by the step 66 of the stepped topido line in the tubular body 60 as the molten extrusion material is introduced through the introduction parts 560 and 560 ', as shown in FIG. 3D. Derived through the derivation unit (570, 570 ') is a line 66 by the stepped topido line is compacted. In this way, the molten extruded material is different from the starting point where the splitting passes through the toffee degree 56, and the meeting point also has a difference so that the flow does not interfere with each other and flows smoothly.

As described above, a synthetic resin (PVC) tube was manufactured using an extruder having a multilayered topido, and as shown in FIG. 3d, a string 66 was not generated in the tube body passing through the extrusion die 10, and it occurred in a stepped shape. There is an advantage that the weak part of the side is improved.

[Comparative Example]

As shown in Figure 1, a conventional resin (PVC) pipe was manufactured using an extruder installed with a single crank topido.

[Test Example]

Tensile yield strength of each of the tubes manufactured in Examples and Comparative Examples was tested according to KS M ISO 6259-1, and the hot break pressure creep test was performed according to KS M ISO 1167, and the results are shown in Table 1. Indicated.

Test results unit Example Comparative example Tensile Yield Strength MPa 45 43 Hot Pressure Creep Resistance
(Test stress 42 MPa) time 1.3 1.0

As can be seen from the above [Table 1], the tube according to the embodiment of the present invention is superior in tensile yield strength and hot-pressure creep resistance than the tube according to the comparative example of the prior art can improve the reliability of the product.

In addition, the specimens cut in the transverse direction based on the longitudinal direction of the PVC pipe produced according to the embodiment was found to have the same effect as the Topido line was diluted than the specimen cut in the longitudinal direction.

10: extrusion die 20: front die
22: front outer die 24: front inner die
26: outer skin 28: inner skin
30: middle die 32: middle die
34: Middle Nadai 36: Confluence
40: rear die 50: topido assembly
52: topido body 56: topido
560, 560 ': introduction part 570, 570': derivation part
580, 580 ': fixed surface 60: tube
62: outer shell 64: inner shell
66: line

Claims (3)

The introduction portion of the toffee 56 is gradually enlarged toward the rear, and the lead portion has a form that gradually decreases toward the rear, wherein the introduction portion, at least one portion of the lead portion is in contact with the extrusion fluid In the extrusion die 10 of the corresponding layered structure,
The toffee 56 is a multi-layered top and bottom of each other, the cross-section of the protrusions of the use surface of one side of the inlet and outlet portion is stepped, so that the molten state of the extruded material passes through the toffee 56 different from the starting point Extrusion die, characterized in that the difference between the point of meeting.

delete  A tubular body produced by the extrusion die of claim 1 to have a stepped string (66).

Images