KR101314243B1 - Molding screw shaft support device of r.p.f injection molding machine - Google Patents

Abstract

PURPOSE: A molding screw axis supporting apparatus of a recycled plastic fuel (RPF) molder is provided to prevent abrasion and lifetime reduction caused by friction separation of molding screws, and to facilitate repair by allowing replacement by joining an extension axis at a rear end of the molding screw. CONSTITUTION: A molding screw axis supporting apparatus of a recycled plastic fuel (RPF) molder comprises a molder for manufacturing RPF; a cylinder (3); an extrusion dice (14); a pair of molding screws (5,6); extension axes (31,32); a supporting block (51); bushes (55,56); axis bearings (33,34); and end parts (31a,32a) of the extension axes. The cylinder is installed in the molder. The extrusion dice is installed at a rear end of the cylinder. The molding screws are installed in the cylinder and are rotated by a driving unit and a power transmission unit. The extension axes are connected to rear ends of the molding screws. The supporting block is installed on a top surface of a frame (2a) of the molder. The buses and the axis bearings are each respectively combined at both sides of the supporting blocks. The end parts of the extension axes are combined to the bushes and the axis bearings.

Description

Shaft Support for Molding Screws of RF Molding Machines {MOLDING SCREW SHAFT SUPPORT DEVICE OF R.P.F INJECTION MOLDING MACHINE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding screw shaft support apparatus of an RPF (recycled plastic fuel, RDF) forming machine that makes a combustible waste such as paper, wood, fiber, plastic, vinyl, etc. into a solid fuel of a predetermined size.

Due to the development of the industry and the improvement of living standards, various industrial products and daily products made of synthetic resins such as plastics and vinyls are used.They are not easily recycled as they are disposed of with general waste after use. There is a problem that pollutes.

Therefore, waste plastics, waste vinyls, waste woods, waste papers, waste fibers, etc., classified as combustible wastes, are sorted and then crushed, dried, molded, etc. "Solid fuel manufacturing apparatus using waste plastics" to prevent the environmental pollution and environmental pollution by using as a fuel by using the same) as the Republic of Korea Patent Publication No. 10-0976340 There is a bar.

Fig. 1 shows the conventional RF molding machine 1, in which a long cylinder 3 is installed on a base 2, and a hopper 4 for raw material input is placed on the top of the cylinder 3. And a pair of front and rear molding screws 5 and 6 are arranged in parallel in the longitudinal direction of the cylinder 3, and a helical gear with a 1: 1 gear ratio is provided at the front end shaft portion of the molding screws 5 and 6. (7) (8) are fixed to each other and engaged with each other, the output shaft 10 of the reducer 9 is connected to the leading shaft portion of one side forming screw 5, the motor 12 to the input shaft 11 of the reducer 9 ) Is connected to the power transmission means 13 is installed to reduce the rotational power is transmitted to one side of the forming screw (5), a pair of forming screws (5) (6) by the helical gears (7) (8) engaged. ) Rotates in the opposite direction to discharge the raw material introduced into the hopper 4 to the extrusion hole 15 formed in the extrusion die 14 while grinding and dehydrating.

The speed reducer 9 is constituted by a plurality of gears and shaft rods and a pulley or a timing pulley or a chain gear is coupled to the rotary shaft of the input shaft 11 of the speed reducer 9 and the motor 12, And the power is transmitted.

Screw-shaped crimping edges 17 and 18 positioned in the dehydration chamber 21 are formed at the front end of the molding screws 5 and 6, respectively, and at the rear end of the molding screw 5 and 6, the molding chamber. Screw-type pressing blades 19 and 20 positioned at 22 are respectively formed.

The molding chamber 22 is moved by the pressing blades 17 and 18 to the raw material having a predetermined size (for example, a raw material cut into a size of 10 mm to 30 mm) introduced into the dehydration chamber 21 through the hopper 4. While pressurized and dewatered, the dewatered water is discharged to the outside of the cylinder 3 through the water extraction hole 23 formed in the side and the bottom of the cylinder 3, the raw material transferred to the molding chamber 22 is the rear end of the cylinder (3) The molten raw material is melted by the heat transfer heater 24 installed on the outer circumferential surface, and the melted raw material is pressurized by the screw-type pressure blades 19 and 20 in the direction of the extrusion port 15 and then solidified while being extruded through the extrusion hole 15. Fuel (RPF) is obtained.

The forming screw (5) (6) is configured such that the outer diameter is gradually increased as the hopper 4 is installed toward the outlet 15 in the inlet direction is greatly improved dewatering and molding efficiency, forming screw (5) In consideration of the rotational direction of (6), the pressing blades 17 and 18 and the pressing blades 19 and 20 are dewatered and molded and discharged while transferring the input raw material to the extrusion port 15.

Non-screw type transfer inhibitors 25 and 26 are formed on the molding screws 5 and 6, respectively, to delay the transfer of raw materials, thereby greatly improving the dehydration and molding efficiency of the raw materials. The transfer inhibiting portions 25 and 26 are spaced apart from the cylinder 3 by a predetermined distance so that the raw materials are efficiently transported without being overloaded, and the cost is reduced by performing dehydration and molding as a single device. It is configured to increase productivity.

The ends of the forming screws (5) and (6) into which the helical gears (7) and (8) are engaged are supported by the shaft support parts (27) and (28) provided with the shaft bearings. However, the gap is prevented, but the rear end of the forming screw (5) (6) is a structure that rotates inside the cylinder (3) without axial support has a problem of severe wear and short life.

That is, the press blades 19 and 20 are easily worn because the tails (back ends) of the molding screws 5 and 6 are rotated while contacting and rubbing against the inner surface of the cylinder 3 by the raw material being extruded. , The inner surface of the cylinder (3) is also easily worn by friction, there was a problem that the overall life is shortened.

This base has a lot of moisture due to the extrusion die 14 and the extrusion port 15, and even if the shaft bearing is installed by the heat of fusion, not only easily oxidized, but also due to reasons such as not able to oil (lubricating oil), Therefore, not only the life of the molding machine 1 is shortened, but also the increase in the rotational load of the forming screws 5 and 6 increases the power consumption and frictional noise of the motor 12, dehydration and molding efficiency are reduced, Metal powder is mixed into the raw material, and there are various problems such as lower combustion efficiency of the final fuel.

As a patent document, Korean Patent Registration No. 10-0976340 (published on Aug. 16, 2010) entitled " Solid Fuel Production Apparatus Using Waste Plastics "

The present invention is configured so that the forming screw of a pair of recycled plastic fuel (RDF) forming machine is axially supported, thereby preventing wear and shortening of life due to the spreading and friction of the forming screws, and at the same time, power consumption. The purpose is to prevent waste and deterioration of molding efficiency.

The RPF molding machine of the present invention is a molding machine 30 for producing RF, a cylinder 3 provided in the molding machine 30, an extrusion die 14 provided at the rear end of the cylinder 3, and the cylinder 3. A pair of molding screws (5) and (6) installed in the rotating shaft by the driving means and the power transmission means, and the extension shafts (31) and (32) fastened to the rear ends of the molding screws (5) and (6); Support blocks 51 installed on the upper surface of the base 2a of the molding machine 30, bushes 55, 56 and shaft bearings 33, 34 coupled to both sides of the support block 51, respectively. And shaft ends 31a and 32a of the extension shafts 31 and 32 coupled to the bushes 55 and 56 and the shaft bearings 33 and 34.

Bushings 65, 66, 67, 68 coupled to the outer circumferential surface of the extension shafts 31, 32, and extrusion dice 15 in which the bushes 65, 66, 67, 68 are installed. And both cutters 49 and 50 fastened to the outer surfaces of the extension shafts 31 and 32.

The fastening structure of the molding screws (5) 6 and the extension shafts (31) (32) includes a first recessed groove (35) 36 formed in the rear end of the molding screws (5) (6), Second concave grooves 37 and 38 formed in the center of the first concave grooves 35 and 36 and a plurality of screw holes formed in the bottom surface of the first concave grooves 35 and 36 ( 39) 40, first protrusions 41 and 42 of extension shafts 31 and 32 coupled to the first recessed grooves 35 and 36, and first protrusions 41 and 42. The second protrusions 43 and 44 formed at the center of the second protrusions 37 and 38, and formed in the first protrusions 41 and 42 and the screw holes 39. And a plurality of holes 47 and 48 through which bolts 45 and 46 which are fastened to 40 are penetrated and the heads of the bolts 45 and 46 are locked.

The present invention can be easily repaired by fastening the extension shafts 31 and 32 to the rear end of the molding screws 5 and 6 of the molding machine 30 for manufacturing RPF, and the extension shafts 31 and 32. The ends of the shafts are supported by the shaft bearings 33 and 34, respectively, to prevent spreading of the forming screws 5 and 6, and also to prevent friction or wear between the cylinder 3 and the forming screws 5 and 6. It is prevented to greatly extend the service life, and the stable rotation and dewatering and molding efficiency of the forming screw (5) (6) is greatly improved and the power consumption is reduced.

The present invention has the effect that the solid fuel discharged through the extrusion port 15 by the plate-shaped cutter 49, 50 provided on the outer surface of the extension shaft 31, 32 is cut to a predetermined length.

According to the present invention, the extruded die 14 can be easily moved and detached / attached from the cylinder 3 by a switch operation. This short effect has an effect of greatly improving productivity.

In the present invention, since the combination of the forming screws (5) 6 and the extension shafts (31) (32) is a fastening structure, the forming screws (5) (6) and / or the extension shafts (31) (32) due to abrasion or failure, etc. ) Is a very useful invention that can be easily replaced when necessary.

1 is a cross-sectional view of a conventional RFP molding machine.
2 is a cross-sectional view of an RRP molding machine shown as an example of the present invention.
3 is a plan view of a molding screw shown as an example of the present invention.
Figure 4 is a cross-sectional view of the shaft support state of the forming screw shown as an example of the present invention.
5 is a longitudinal cross-sectional view of the shaft support state of the molding screw shown as an example of the present invention.
6 is a side cross-sectional view of an RRP molding machine shown as an example of the present invention.
7 is a cross-sectional view of the extrusion die of the RRP (RPF) molding machine shown as an example of the present invention separated.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the embodiments of the present invention, the same components as in the drawings are denoted by the same reference numerals as possible, and detailed descriptions of known configurations and functions are omitted so as not to obscure the gist of the present invention.

Refuse Derived Fuel (RDF) and Refuse Plastic Fuel (RPF), which are solid fuels, are new and renewable energy produced by burning combustible wastes through solidification processes such as screening, crushing, drying and molding. RDF is a non- , Organic matter, PVC, etc., and separates only combustible materials. RPF refers to fuel made by using waste plastic by more than 60% by weight.

The wastes to be used as raw materials in the present invention may be selected from combustible wastes such as municipal wastes, industrial wastes and construction wastes such as paper, wood, fibers, plastic, vinyl and the like and then subjected to crushing, And a solid fuel of a predetermined size and shape is obtained.

2 and 3 are cross-sectional views of the RPF (including RDF) molding machine 30 shown as an example of the present invention, FIG. 3 is a partial cross-sectional view of the molding screws 5 and 6, and FIG. 4 is a forming screw 5 (6) is a cross-sectional view of the shaft support portion, the extension shafts 31, 32 are fastened to the rear end of the forming screw (5) (6) to be replaced, and the ends of the extension shafts (31) (32). The shafts are supported by the shaft bearings 33 and 34, respectively, to prevent spreading of the forming screws 5 and 6, and to prevent friction and wear between the cylinder 3 and the forming screws 5 and 6, respectively. As a result, the service life is greatly extended, and stable rotation and dewatering and molding efficiency of the molding screws 5 and 6 are greatly improved and power consumption is reduced.

In the present invention, the first recessed grooves 35 and 36 having a large inner diameter are formed at the rear end of the molding screws 5 and 6, and the small inner diameters are formed at the center of the first recessed grooves 35 and 36. Two recessed grooves 37 and 38 are formed, respectively, and a plurality of screw holes 39 and 40 are formed in the bottom surface of the first recessed grooves 35 and 36.

First protruding portions 41 and 42 coupled to the first recessed grooves 35 and 36 are formed at the distal ends of the extension shafts 31 and 32 having a smaller diameter than the molding screws 5 and 6, In the center of the first protrusions 41 and 42, second protrusions 43 and 44 coupled to the second recessed grooves 37 and 38 are formed, and in the first protrusions 41 and 42, respectively. A plurality of holes 47 and 48 through which the bolts 45 and 46 which are respectively fastened to the screw holes 39 and 40 penetrate and the heads of the bolts 45 and 46 are engaged are formed. 1 The outer diameters of the protrusions 41 and 42 are larger than the outer diameters of the extension shafts 31 and 32 to secure a region in which the holes 47 and 48 are formed.

Accordingly, the first and second protrusions 41 and 42 of the extension shafts 31 and 32 are respectively coupled to the first and second recessed grooves 35 and 36 of the forming screws 5 and 6, respectively. When the bolts 45 and 46 are fastened, the extension shafts 31 and 32 are firmly fastened to the rear ends of the molding screws 5 and 6, and since they are fastened to each other, the molding screws 5 and 6 or the extension shafts are fastened. (31) (32) can be easily replaced.

On the outer surface of the extension shafts 31 and 32, the bent portions of the cutters 49 and 50, which are configured in the form of plates, are fastened so that they can be replaced by pieces, so that they rotate along the extension shafts 31 and 32, thus extruding. Solid fuel discharged through the sphere 15 is cut to a predetermined length.

A support block 51 having a structure parallel to the extrusion die 14 is provided on an upper surface of the base 2a having an extended length, and the shafts of the extension shafts 31 and 32 are provided on both sides of the support block 51. Shaft bearings 33 and 34 are provided with end portions 31a and 32a coupled to each other, so that the rear ends of the forming screws 5 and 6 are axially supported, and the spreading of the forming screws 5 and 6 is prevented. Friction and abrasion between the cylinder (3) and the forming screw (5) (6) is prevented, the service life is greatly extended, stable rotation and dewatering and molding efficiency of the forming screw (5) (6) is greatly improved, The rotational load of the forming screws 5 and 6 is reduced, so that the power consumption of the motor 12 is reduced.

Since the extension shafts 31 and 32 support the rear ends of the molding screws 5 and 6, they are smaller than the molding screws 5 and 6. As shown in FIG. That is, even if the diameter (or outer diameter) of the extension shafts 31 and 32 is formed to be about 3/5 to 2/5 smaller than the diameter (or outer diameter) of the molding screws 5 and 6, sufficient shaft support is achieved. Therefore, the material waste can be reduced, and the size of related parts including the shaft bearings 33 and 34 can also be configured in a small size, thereby reducing manufacturing costs and weight.

Of course, the extension shafts 31 and 32 may be formed by integrally processing the rear end of the molding screw (5) (6).

The upper and side portions of the extension shafts 31 and 32 may be covered with a cover (not shown) and then fastened with a plurality of bolts to protect the cutters 49 and 50, and the raw materials may be discharged to the extrusion holes 15. Is not discharged to the top or side, but to the discharge chute and / or vessel at the bottom.

The support block 51 is fixed by welding to the upper portion of the base (2a) extending to one side of the base (2), or is firmly fastened and fixed by a fastening member such as the fixing member 52 and the bolt 53, In the pair of shaft holes formed in the support block 51, the bushes 55, 56 and the shaft bearings 33, 34 are respectively coupled to the shaft ends 31a and 32a of the extension shafts 31 and 32, respectively. And the oil seal covers 57 and 58 are installed on the outer side of the support block 51 so as to be kept airtight, and the shaft bearings 33 and 34 and the oil seal cover 57 are provided. Oil chambers (59) and (60) are formed between the (58) so that oil (lubricating oil) is lubricated (supplyed) to the shaft bearings (33) and (34). The oil inlets 61 and 62 provided with each are configured.

In the present invention, bushes 65, 66, 67 and 68 are installed on both sides of the through hole of the extrusion die 15 through which the extension shafts 31 and 32 pass. do.

That is, the bushings 65, 66, 67 and 68 are coupled to the outer circumferential surface of the extension shafts 31 and 32 so that the extension dies 31 and 32 pass through. The bushes 65, 66, 67, and 68 are provided at both sides of the through hole to shorten the life of the extension shafts 31 and 32 by preventing the extension shafts 31 and 32 from contacting the extrusion die 14. Is prevented. The bushes 65, 66, 67, and 68 are coupled to the through holes of the extrusion die 14 so as to be replaced, and then fastened by bolts 69 and 70 so as to be separated / combined.

Contact between the extension shafts 31 and 32, which are the rotating body, and the extrusion die 15, which is the fixed body, is prevented. The bushes 65, 66, 67, and 68 may be slidly coupled to the outer circumferential surfaces of the extension shafts 31 and 32, or may be spaced apart from the outer circumferential surfaces of the extension shafts 31 and 32.

The present invention is easy to replace and repair by fastening so as to detach / combine the extension shafts 31 and 32 at the rear end of the forming screws 5 and 6.

That is, when the extension shafts 31 and 32 are to be replaced, the bolts 45 and 46 are not required to be separated from the cylinder 3 by the long, large and heavy molding screws 5 and 6. It is sufficient to separate and replace the extension shafts 31 and 32 fastened by

For example, the support block 51 is separated from the base 2a, and the shaft ends 31a, 32a, bushes 55, 56, and bearings 33, 34 of the extension shafts 31, 32, respectively. And extruded dies 14 fastened to the fixed portion 73 of the cylinder 3 so as to expose the molding screws 5 and 6 and the extension shafts 31 and 32, Loosen the bolts 45 and 46 and repair the extension shafts 31 and 32 from the forming screws 5 and 6, or replace the new extension shafts 31 and 32 with the forming screws 5 and 6. And then tightening and fixing with a plurality of bolts 45 and 46, and fastening and separating the extruded dice 14 separated from the fixing portion 73 of the cylinder 3, and repairing or replacing the extended shaft ( The shaft ends 31a, 32a, bushes 55, 56, and bearings 33, 34 of 31, 32 are engaged, and the separated support blocks 51 are fastened to the base 2a. You can fix it. Of course, the replacement process is described as an example, and the order may be changed in part.

FIG. 6 is a front view of the extrusion die 14. Extrusion openings 15 are formed around the extension shafts 31 and 32 at predetermined intervals, and the upper and lower portions of the extrusion die 14 and Electrothermal heaters 71 and 72 are installed on both sides to maintain constant temperature at a predetermined temperature, thereby effectively extruding and forming RPF solid fuel well.

The solid fuel discharged to the extrusion hole 15 is a long circular shape by the shape of the extrusion hole 15, the cutter is installed on the extension shafts 31 and 32 and rotates along the extension shafts 31 and 32. It cuts to predetermined length by (49) (50).

Meanwhile, RDF (Refuse Derived Fuel) and RPF (Refuse Plastic Fuel), which are solid fuels, are renewable energy that is produced as a solid fuel through the process of sorting, crushing, drying and molding flammable waste. It is a fuel made by removing heavy combustibles, organic matter, PVC, etc. and separating only flammables, and RPF means fuel made by using about 60% or more of waste plastics by weight. Various types of combustible wastes from industrial wastes, construction wastes, etc., such as paper, wood, fiber, plastics, vinyl, etc. do.

The extrusion die 14 is configured to be detachable / attachable by a simple moving method by the guide means and the drive means.

That is, the fixing portion 73 protruding outwardly at the end of the cylinder 3, the extrusion die 14 is fastened to the fixing portion 73 by fastening members such as bolts 74 nuts 75, and the Drive means for easily moving the extrusion die 14 by the operation of the switches 79 and 80 of the controller 76, guide means for guiding the movement of the extrusion die 14, and excess of the extrusion die 14 It is composed of a detection switch 79, 80 to block the movement.

The extruded die 14 guide means includes a plurality of LM blocks 81 and 82 fixed to an edge portion of the bottom surface of the extruded die 14 and a sliding motion under the plurality of LM blocks 81 and 82. And a pair of LM rails 83 and 84 coupled to each other, and pedestals 85 and 86 fixed to the bottom surfaces of the LM rails 83 and 84 and installed on the frame 2, The extrusion die 14 is attached to or detached from the cylinder 3 while moving along the LM rails 83 and 84.

On both sides of the one side pedestal 85, a pair of detection switches 79 and 80 are installed to detect and interrupt (control) excessive movement of the extrusion die 14.

The pair of sensing switches 79 and 80 are connected to an input of the controller 76 to transmit a sensing signal to the controller 76, and the extrusion die 14 which is moved to a detachable position or an attached position by a moving means. Is excessively moved, is sensed and / or switched to the sense switch (79) (80) is input to the controller 76, the controller 76 is a sense signal from the sense switch (79) (80) When input, the power applied to the geared motor 87 is cut off so that the geared motor 87 is stopped and the movement of the extrusion die 14 is stopped, thereby preventing excessive movement or deviation of the extrusion die 14. .

Between the main body of the sensing switches 79, 80, the operation between the protruding, respectively, the operation between the shaft is mounted on the main body of the sensing switch (79) (80) and supported, by the external pressure of the extrusion die 14 It is a configuration that detects when the operation is pivoted.

When the extrusion die 14 is detached / attached, the driving means for moving to the detached position or the attachment position includes a pair of blocks 88 and 89 spaced apart and parallel to the bottom surface of the extrusion die 14; A pair of racks 90 and 91 fastened to the longitudinal bottom surfaces of the blocks 88 and 89, respectively, and a pinion 92 to be geared to the pair of racks 90 and 91, respectively. 93, a rod body 94 into which the pinion 92 and 93 are fitted and fixed, shaft bearings 95 and 96 fixed to the frame 2 and axially supporting both ends of the rod body 94, The first chain gear 97 is fitted to one side of the rod body 94 and is fixed to the end of the drive shaft 98 connected to the rotating shaft of the inverter motor or geared motor 87 installed in the frame 2 and capable of forward and reverse rotation, It is composed of a chain 100 for transmitting the rotational force to the pinion (92) (93) by connecting the second chain gear (99) fixed and the first and second chain gears (97, 99).

The geared motor 87 is installed in the frame (2), the drive shaft 98 is connected to the rotary shaft of the geared motor 87 by the coupler 101 is the shaft bearing on the bracket 102 is installed on the frame (2) 103, 104 is installed.

The geared motor 87 is controlled by a controller 76 having a forward rotation switch 77 and a reverse rotation switch 78.

That is, in the case where the extruded die 14 is to be detached and moved for cleaning or repairing, the bolt 74 and the nut 75 fastened to the extruded die 14 and the fixing part 73 are loosened or removed. In this case, when the operator presses the reverse switch 78, the controller 76 drives the geared motor 87, and thus the drive shaft 98 and the first and second chain gears 97 and 99 of the geared motor 87 ), The chain 10 and the pinion 92, 93 is reversely rotated, the rack 90, 91 is moved by the pinion 92, 93 in the opposite direction to the fixing portion 73, the LM rail The extrusion die 14 is moved to the detachable position opposite to the fixing part 73 by the guide of the LM guide composed of the 83 and 84 and the LM blocks 81 and 82, as shown in FIG. ) Is maintained, if excessively moved past the removable position is detected by the detection switch 80 to prevent further excessive movement.

Since the plurality of extruded holes 15 are completely exposed in the state in which the extruded die 14 is detached, the plurality of extruded holes 15 can be easily cleaned, cleaned, or repaired.

On the other hand, when the washing, cleaning or repair of the extrusion die 14 is completed, the extruded die 14, which has been detached, is moved to the fixing portion 73, and the coupling groove of the extrusion die 14 is placed on the engaging protrusion of the cylinder 3. Attaching and then firmly tightening with a plurality of bolts 74 and nuts 75 achieve attachment of the extrusion die 14.

That is, when the operator presses the forward rotation switch 77 in the state where the extrusion die 14 is detached as shown in FIG. 7, the controller 76 drives the geared motor 87, and thus, the drive shaft of the geared motor 87 98, the first and second chain gears 97 and 99, the chain 100 and the pinion 92 and 93 rotate forward, and the rack 90 and 91 are driven by the pinion 92 and 93. As shown in FIG. 5, the extrusion die 14 is fixed by the guide LM guide including the LM rails 83 and 84 and the LM blocks 81 and 82 as shown in FIG. 5. It is moved (attached) to the attachment position in the direction and is sensed by the detection switch 79 to prevent further excessive movement.

When the extrusion die 14 is coupled to the fixing portion 73 and fastened with a plurality of bolts 74 and nuts 75 which have been relaxed and separated, the extrusion die 14 is firmly attached to the cylinder 3, It is only necessary to operate the F manufacturing system to produce and manufacture the solid fuel.

In the present invention, since a pair of blocks 88 and 89 are installed on both bottom surfaces of the extrusion die 14, the heat transfer heaters 71 and 72 are installed to maintain an appropriate extrusion temperature of the extrusion die 14. It is provided in both sides of the extrusion die 14, and is comprised so that favorable heat_generation | fever can be achieved.

That is, as shown in FIG. 6, the plurality of heat transfer heaters 71 and 72 are disposed in parallel at predetermined intervals on both sides of the extrusion die 14 so as to surround the extrusion hole 15, and the heat transfer heaters positioned at the upper and lower portions thereof ( 71 is configured to be long enough to touch each other, thereby uniformly generating heat in the extrusion die 14.

According to the present invention, the extrusion die 14 having a weight of several tons by the guide means and the driving means is easily detached or attached from the end portion or the fixing portion 73 of the cylinder 3 by the operation of the switches 77 and 78. 3 to 4 workers are unnecessary as in the prior art, and the detachment / attachment of the extrusion die 14 can be achieved quickly and easily, and cleaning, cleaning and repairing are also easy.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, It is self-evident to those of ordinary skill.

(1) (30)-molding machine (2) (2a)-expectation
(3)-cylinder (5) (6)-molding screw
(12)-Motor (14)-Extrusion Dice
(15)-Extrusion (31) (32)-Extension shaft
(31a) (32a)-Axle end (33) (34)-Axle bearing
(35) (36)-First Concave Groove (37) (38)-Second Concave Groove
(39) (40)-Screw Hole (41) (42)-First Protrusion
(43) (44)-Second protrusion (45) (46) (53) (69) (70) (74)-Bolt
(47) (48)-hole (49) (50)-cutter
(51)-support block (52)-fixing member
(55) (56) (65) (66) (67) (68)-Bush (57) (58)-Oil Seal Cover
(59) (60)-Oil Room (61) (62)-Oil Injection
(71) (72)-Electric Heater (73)-Paving Government
(75)-Nut (76)-Controller
(77) (78)-Switch (79) (80)-Sense Switch
(81) (82)-LM Block (83) (84)-LM Rail
(85) (86)-Base (87)-Geared Motor
(88) (89)-Block (90) (91)-Rack
(92) (93)-Pinion (94)-Sewing
(95) (96) (103) (104)-Axle Bearing (97)-First Chain Gear
(98)-Drive Shaft (99)-Second Chain Gear
(100)-Chain (101)-Couple
(102)-Bracket

Claims (3)

RF molding machine 30;
A cylinder (3) installed in the molding machine (30);
An extrusion die 14 installed at the rear end of the cylinder 3;
A pair of forming screws (5) (6) installed in the cylinder (3) and rotating by a driving means and a power transmission means;
Extension shafts 31 and 32 fastened to rear ends of the forming screws 5 and 6;
A support block 51 installed on an upper surface of the base 2a of the molding machine 30;
Bushes 55 and 56 and shaft bearings 33 and 34 coupled to both sides of the support block 51, respectively;
Shaft ends 31a and 32a of the extension shafts 31 and 32 coupled to the bushes 55 and 56 and the shaft bearings 33 and 34;
Molding screw shaft support device of the RF molding machine comprising a. The method of claim 1,
Bushes 65, 66, 67 and 68 coupled to the outer circumferential surface of the extension shafts 31 and 32;
Both through holes of the extrusion die 15 in which the bushes 65, 66, 67, 68 are installed;
Cutters 49 and 50 fastened to outer surfaces of the extension shafts 31 and 32;
Molding screw shaft support device of the RF molding machine comprising a. The method according to claim 1 or 2,
The fastening structure of the forming screw (5) (6) and the extension shaft (31) (32),
First recessed grooves 35 and 36 formed at rear ends of the forming screws 5 and 6;
Second recessed grooves 37 and 38 formed in the center of the first recessed grooves 35 and 36;
A plurality of screw holes 39 and 40 formed on the bottom surface of the first recessed grooves 35 and 36;
First protrusions 41 and 42 of extension shafts 31 and 32 coupled to the first recessed grooves 35 and 36;
Second protrusions 43 and 44 formed at the center of the first protrusions 41 and 42 and coupled to the second recessed grooves 37 and 38;
A plurality of holes formed in the first protrusions 41 and 42 and through which the bolts 45 and 46 which are fastened to the screw holes 39 and 40 pass, and which the heads of the bolts 45 and 46 are locked; (47) (48);
Molding screw shaft support device of the RF molding machine comprising a.

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