KR101725131B1 - Mixing type extruder head for sheet forming - Google Patents

Abstract

The present invention relates to a head of an extruder (10) which molds rubber or plastic boards continuously, in which an upper plate (20) and a lower plate (30) are joined together to form a cavity inside the head, and multiple spindle-shaped mixing blocks (60) are formed in alternating manner so that a fluidic molded article discharged from the extruder (10) passes through the multiple mixing blocks (60) and thus gets mixed together to be discharged. Accordingly, the present invention can form flat extrusion-molded articles having enclosed and stable structures and maintain consistent strength and properties in the central and peripheral portions of the flat molded articles, and can keep all of the materials uniformly distributed throughout the product during the formation of a flat extrusion-molded articles having mutually different materials mixed therein.

Description

TECHNICAL FIELD [0001] The present invention relates to a mixing type extruder head for producing a sheet-

The present invention relates to a head of an extruder (10) for continuously molding a rubber or a synthetic resin plate and is characterized in that a cavity is formed inside the head by joining the upper plate (20) and the lower plate (30) Shaped mixed flow block 60 of the extruder 10 so that the fluidized product discharged from the extruder 10 is mixed and discharged while passing through the plurality of mixed flow blocks 60 It is.

An extruder 10 for continuously molding a rubber or synthetic resin molded article having the same cross section continuously produces various types of continuous molded articles such as a bar body, a tube body and a body, ) Is mounted on the end of a cylinder body having a built-in pressure-feeding means such as a die.

The extruder 10 for extruding a plate-shaped molding such as a rubber sheet or a sheet made of a synthetic resin is provided with a die in which a long hole coinciding with the cross section of the plate body to be manufactured is mounted, Patent No. 1521115 can be mentioned.

A conventional plate-shaped extruder 10 including the patent No. 1521115 is equipped with a die having a slit slit coinciding with the cross-section of the plate body to be manufactured, and a semi-solid semi-solid Semi-solid semi-solid material) is molded into a plate while passing through the slit of the die.

That is, in the prior art, a general molded article such as a tubular body or a tubular body in which the width of the finished product does not greatly differ from the discharge diameter of the extruder 10, and a plate in which the width of the finished product dramatically increases compared to the discharge diameter of the extruder 10, The following problems are caused.

First, in the process of discharging the plate-shaped product, a deviation occurs in the material density of the central portion and the material density of the outer peripheral portion, resulting in an imbalance in the structure of the finished product.

This is a phenomenon that the pressing force applied by the screw 19 or the like of the die after-extruder 10 during the process of passing the molded product through the die having the enlarged slit formed is concentrated on the center portion but not sufficiently transmitted to the outer portion, Not only defective molding, but also defects such as shortage of strength and early deterioration of the outer frame part.

Further, when additives or various kinds of raw materials are applied, poor material mixing or material separation is caused.

In order to satisfy physical properties required according to the use of the finished product, the plate-shaped products such as a rubber-made plate or a synthetic resin-made plate can be supplied with various additives together with the main raw material or mixed with different kinds of raw materials into the extruder 10 In this case, the fluidized molding passes through the simple-cut die and is expanded and molded into the plate, which causes the heterogeneous raw material to be separated and biased.

For extrusion molding of various raw materials, metal or mineral powders may be added to raw materials such as rubber or synthetic resin, synthetic resins of different physical properties may be mixed or applied, or micro-bubbles may be formed in the molding by injecting a blowing agent or compressed air In the case of applying various raw materials, there are differences in the feeding speed and the spreading speed in the feeding process through the die due to the difference in physical properties such as the specific gravity or the viscosity between the different raw materials.

Such unbalanced conveying or diffusing material is inevitably exacerbated in the extrusion molding of a plate-shaped article in which the cross-sectional enlargement is considerable as compared with other extrusion molding. This unevenness is also parallel to the unbalance of the above- It will be a serious drawback that deteriorates the quality.

Disclosure of the Invention The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a head for ejecting a plate-like molded product mounted on the tip of an extruder, wherein the upper plate and the lower plate are joined to form a head, A cavity is formed which gradually expands in the direction of conveying the molding, an inlet 51 connected to the extruder 10 for supplying the molding is formed at the rear end of the head, A plurality of mixing blocks 60 connecting the bottom surface of the upper plate 20 of the inner cavity of the head and the upper surface of the lower plate 30 are formed and the mixing block 60 is formed in a plane And a joining face 62 and a joining face 62 which form an upper spindle shape and which form a slope with respect to the advancing direction of the molding on both sides are formed and the fluidized shaped articles discharged from the extruder 10 are mixed The flow path between the separation surface 61 and the joining surface 62 of the block 60 The oil is mixed flow (混流) is plate-shaped molded product for making the horn-flow extruder head, characterized by discharged from the exhaust vent 52 as pressure feed.

A transverse recessed portion 56 is formed on the upper surface of the lower plate 30 between the uppermost mixed block 60 and the outlet 52 in the head so as to intersect with the traveling direction of the molded product. (23) is formed on the bottom surface of the discharge port (20) to press the molded article behind the discharge port (52).

According to the present invention, it is possible to produce a plate-like extrudate having a tight and stable structure and to maintain the strength and physical properties between the center portion and the outer portion of the plate-shaped product uniformly.

In addition, in a plate-like extruded product in which a heterogeneous material is mixedly applied, it is possible to prevent biasing or separation of a specific material.

1 is a perspective view of an extruder to which the present invention is applied.
2 is a perspective view of the present invention
3 is an exploded perspective view of the present invention
4 is a longitudinal sectional view of the mounting state of the present invention
Figure 5 is a representative cross-sectional view of the operating state of the present invention
FIG. 6 is a perspective view of a cut-away perspective view of an embodiment of the present invention in which a movable curved-
Fig. 7 is an explanatory diagram of an operation method of the embodiment of Fig. 6

The detailed configuration and principle of the present invention will be described with reference to the accompanying drawings.

1 is a perspective view showing an outline of an extruder 10 equipped with a head of the present invention. As shown in the figure, the present invention is mounted on the tip of the extruder 10, that is, the tip of the cylinder of the extruder 10, The fluidized-bed molding discharged from the cylinder of the apparatus 10 is discharged and discharged to produce a plate-shaped molding.

1 and 2, the head for the extruder 10 of the present invention is formed by joining an upper plate 20 and a lower plate 30, and a flange is provided at the rear end of the upper plate 20 and the lower plate 30 And mounted at the tip of the cylinder.

1 and 2, a discharge slit 41 having a shape conforming to the cross section of the thin plate shaped article is formed on the front end of the head composed of the upper plate 20 and the lower plate 30 The cut front plate 40 is attached so that the molded product discharged from the head is formed into a thin plate while passing through the discharge slit 41 in the front plate 40 again.

As shown in FIG. 3, a plurality of mixing blocks 60 are formed in the inner space of the head, to which the upper plate 20 and the lower plate 30 are joined, The fluidized molding passing through the head repeats the division flow and the mixed flow, and the pressing pressure of the molding is also repeatedly branched and combined.

1 to 4, the head is a head which is attached to the tip of the extruder 10 and discharges a plate-like molded product. The upper plate 20 and the lower plate 30 are joined to form a head, A cavity is formed which gradually expands in the direction of conveying the molding, an inlet 51 connected to the extruder 10 for supplying the molding is formed at the rear end of the head, A plurality of mixing blocks 60 connecting the bottom surface of the upper plate 20 of the inner cavity of the head and the upper surface of the lower plate 30 are formed and the mixing block 60 is formed in a plane (61) and a joining surface (62) which form an upper spindle shape and which are inclined with respect to the advancing direction of the molding on both sides thereof.

As shown in FIG. 3, the top plate 20 and the bottom plate 30 constituting the head have the same outer shape in plan view, and a plurality of screws are fastened to each other at a point where the mixing block 60 is formed inside the outer shell and inside, At least one of the upper and lower plates 20 and 30 is protruded so that a cavity is formed inside the head when the upper plate 20 and the lower plate 30 are joined to each other. A cavity may be formed inside the head when the upper plate 20 and the lower plate 30 are joined to each other. However, if the cavity can be formed inside the head, the outer surface of the upper plate 20 may protrude, Various extensions are possible, such as protruding outlines of all.

3 and 4, the mixed block 60 is protruded upward from the upper surface of the lower plate 30 and the upper surface of the mixed block 60 is closely attached to the lower surface of the upper plate 20 The mixing block 60 is provided in the cavity of the head but the mixing block 60 may protrude from the upper plate 20 toward the lower plate 30.

The head of the present invention in which the upper plate 20 and the lower plate 30 are joined to each other is mounted on the cylinder end of the extruder 10 in a manner such as a flange connection or the like, The fluidized-bed molding is introduced into the cavity between the upper plate 20 and the lower plate 30 through the inlet 51 formed at the rear end of the head and then discharged through the discharge ports 52, respectively.

3 and 5, a plurality of mixing blocks 60 disposed in the inner cavity of the head are formed in such a manner that the inlet 51 side of the front mixing block 60 is connected to the rear mixing block 60, Of the discharge port (52).

5, the mixed-flow block 60 is formed into a fusiform shape having apices at the front end and the rear end based on the advancing direction of the molding on the plane, A joining surface 62 which is also an inclined surface is formed on the side of the discharge port 52 of the head and the front side attachment of the mixed block 60 positioned rearward with respect to the molding progress path is formed forward So as to be positioned more forward than the rear side attachment of the mixed block 60 located at the rear end of the mixing block.

3 and 5, the number of the mixed flow block 60 increases from the inlet 51 to the outlet 52, but the size of the mixed flow block 60 is gradually reduced, As described above, the inner cavity of the head is formed so that its width gradually increases in the advancing direction of the molded article. On the upper surface of the cavity bottom plate 30, an end inclined surface 55 gradually rising toward the discharge port 52 is formed , The moldings are led so that the width in the plane is enlarged while the upper and lower thicknesses are reduced.

Accordingly, the fluidized shaped article discharged from the extruder 10 flows into the cavity in the head, the planar width gradually increases, the upper and lower thickness gradually decreases, And flows into the outlet 52 through the flow path passing through the confluent surface 62 and the confluent surface 62.

The flow path of the fluidized-bed forming material passing through the mixed flow block 60 is branched (branched) through the arrangement of the plural mixed flow blocks 60 and the formation of the dendritic or meshed flow path. The pressure distribution and the tissue density can be uniformized over the entire point of the cross section of the molded article while repeating the combination of the press-feeding pressure of the molded article and the branching, and in addition, The entire material can be uniformly distributed and the biasing of the additives or the material separation can be suppressed when mixing the additives or mixing the dissimilar materials.

3 to 5, on the upper surface of the lower plate 30 between the foremost mixing block 60 and the discharge port 52 in the head, a transverse recessed portion 56 intersecting with the traveling direction of the molding is formed, A protruded curved pressing portion 23 is formed on the bottom surface of the upper plate 20 on the upper portion of the recess 56 to form a tightly sealed structure in the molded article by pressing the molded article just behind the outlet 52 after discharge.

5, a curved pressing part 23 curved and projected downward is formed on the bottom of the rear part of the discharge port 52 of the upper plate 20 constituting the head, and the curved pressing part 23 The transverse concave portion 56 is formed on the upper surface of the lower lower plate 30 so that the transverse concave portion 56 and the curved urging portion 56 just before the fluidized molding pressurized and fed via the mixing block 60 are discharged to the discharge port 52, 23, the entire cross-section is pressed uniformly while passing through the bending-deflecting flow path (gradual bending flow path).

6 and 7 show an embodiment in which the curvature-pressing portion 23 is movable, and the curvilinear-pressing portion 23 is configured to be movable up and down, whereby the shape of the above- So that the degree of compression of the molding immediately before discharge can be controlled.

6, the active block 24 having the curved pressing portion 23 formed at the lower end thereof is installed so as to be vertically movable up and down from the bottom surface of the front end portion of the upper plate 20 The position of the curvature-pressing portion 23 can be adjusted.

6 and 7, a plane-shaped rectangular passenger compartment 26 is formed in the rear portion of the discharge port 52 of the upper plate 20 constituting the head, and the passenger- An active block 24 having a longitudinal width corresponding to the front and rear width of the passenger compartment 26 is inserted into the passenger compartment 26, The threaded hole 25 is drilled and the lower end of the adjusting screw 28 inserted in the insertion hole 27 is fastened to the screw hole 25 of the active block 24, 20 so that the active block 24 is moved up and down in a state of being coupled to the passenger compartment 26 as the adjusting screw 28 is rotated.

As shown in FIG. 6, the active block 24 can be installed in a plurality of sections for dividing the entire cross section of the head, thereby applying a different pressing force to each section divided in the cross section of the molded article.

10: extruder
19: Screw
20: Top plate
23:
24: Activity Block
25:
26:
27: Insertion ball
28: Adjustment screw
30: Lower plate
40: front plate
41: Discharge slit
51: inlet
52: Outlet
55: end slope
56: transverse recess
60: mixed block
61; Classification plane
62: joining face

Claims (2)

A head which is mounted on the tip of the extruder 10 and discharges a plate-like molded product is composed of a head composed of an upper plate 20 and a lower plate 30 joined to each other. Inside the head, And an inlet port 51 connected to the extruder 10 for supplying a molding is formed at the rear end of the head and a long hole outlet 52 for discharging the molded product is formed at the front end of the head, A plurality of mixing blocks 60 are formed to connect between the bottom surface of the upper plate 20 of the inner cavity and the upper surface of the lower plate 30. The mixing block 60 has a planar spindle shape, And a mixing plane (61) and a joining plane (62), which are inclined, are formed in the extruder head
A plurality of mixing blocks 60 disposed in the inner cavity of the head are formed so that the front end of the front mixing block 60 on the inlet 51 side is connected to the outlet 52 side of the rear mixing block 60, ≪ / RTI >
The number of the mixed flow blocks 60 increases from the inlet port 51 toward the outlet port 52, but is reduced in size;
The fluidized shaped articles discharged from the extruder 10 are mixed and flowed while being fed through the flow path between the flow dividing surface 61 and the joining surface 62 of the multiple mixing block 60, (52). ≪ / RTI >
A transverse concave portion 56 is formed on the upper surface of the lower plate 30 between the forefront side mixing block 60 and the discharge port 52 in the head to intersect with the traveling direction of the molding;
A projected curved pressing portion 23 is formed on the bottom surface of the upper plate 20 on the upper portion of the transverse concave portion 56;
Wherein the extruder head pushes the molding behind the discharge port (52).

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