KR920000364B1 - Cutting method and apparatus for foaming articles - Google Patents

Abstract

The apparatus continuously cuts plate-type foam material, formed from an extruding/foaming equipment, by melting the cutting face with an electric heating wire, so the cutting face gets smoothe and precise. The apparatus comprises a cutter (3) moving along a guide road (2) equipped near a vertical foam (1), an actuator (4) moving the cutter (3) up/down by using shafts (42,44,44') and bevel gears (43,45,46) geared with the shafts, and a feeder (5) feeding cut workpieces to a wanted position. The cutter (3) has 4 electric heating wires fixed at fixtures.

Description

Method and apparatus for cutting extruded foam

1 is a perspective view showing the appearance of the present invention.

Figure 2 is a perspective view showing a separate cutting machine installed in the present invention.

3 is a plan view of FIG.

4 is a bottom view of FIG.

5 is a detailed view of portion A of FIG.

6 is a detailed view of portion B of FIG.

Figure 7 is a cross-sectional view showing the operating relationship of the cutter and the up and down operating mechanism installed in the present invention.

8 is a partially omitted perspective view showing the main portion of the transfer mechanism installed in the present invention.

9 is a schematic diagram illustrating a cutting collection mechanism installed in the present invention.

10 is an operational flowchart of the present invention.

* Explanation of symbols for the main parts of the drawings

1: Vertical Frame 2: Guide Rod

3: cutter 1a, 1b: crossbar

4: up and down operating mechanism 5: transfer mechanism

6: Cutting collection mechanism 11,11 ′: Species

12,12 ': width 13: support

14,14 ′, 15,15 ′, 60: Hot wire 16,17: Tangier fixture

40: wheel case 41,41 ', 41 ”, 52,53,55: sprocket wheel

42: working shaft 43,43 ', 45,45', 46,46 ': bevel gear

50: frame 51: feed roll

54,56: Chain 61: Expectations

62: feeding fan 63: open space

64: feeding passage 65: suction duct

The present invention relates to a method and apparatus for cutting an extruded foam, which enables to cut quickly and accurately a continuous plate-shaped foam molded through an extrusion foam molding apparatus to an appropriate size.

In general, foams that are extruded using thermoplastic resins such as styrene or polyurethane mixed with a blowing agent are extruders or methods as described in Patent Publications Nos. 83-1231 to 1237,2740,2741,85-1875 and 1876. The molded product is molded using the foam and the foamed foam is continuously drawn out along the conveyor line, and the foam can be released as a finished product only when the foam is cut to an appropriate size.

As the cutting method as described above, a cutting method using a rotary saw and a method by cutting a rotary cutting edge have been mainly used. Cutting method by the rotary saw has the advantage that can be cut according to the speed at which the foam is conveyed because the cutting is made by high-speed rotation, but the cutting surface is not smooth and the straightness is almost impossible to maintain due to the mechanical characteristics of the rotary saw. It is difficult to obtain accurate product after cutting because it is difficult to obtain accurate dimension after cutting because cutting is performed during transfer. The cutting method by cutting the rotary cutting blade has the disadvantage that productivity is decreased due to the slow cutting speed and particles are dropped during processing due to the foam characteristics, and the surface texture is not good after processing. This method also has difficulties in tolerance management because it is difficult to have accurate straightness after cutting and the size of the product is not constant after cutting.

The present invention has been researched and developed to solve the above-mentioned conventional problems, and has the following objects.

The first object of the present invention is to achieve a smooth and accurate straightness of the cut surface by adopting a melt cutting method by a heating wire, rather than by a rotary saw or a rotary cutting blade unlike the prior art extruded foam to have the correct dimensions after cutting To provide a method and apparatus for cutting.

It is a second object of the present invention to provide a method and apparatus for cutting an extruded foam which can improve productivity by making a continuous cut at a time in a state where a plurality of foams cut to a predetermined size are stacked.

It is a third object of the present invention to provide a cutting method and apparatus for cutting an extruded foam which can be cut at any time when the cutter is raised or lowered, which can be conveniently used according to the user's intention.

The fourth object of the present invention is to provide a method and apparatus for cutting an extruded foam which can easily adjust the cutting size of the foam and is made of a precise size cutting having straightness, which makes the tolerance management easy and improves the product quality. It is.

It is a fifth object of the present invention to provide a method and apparatus for cutting an extruded foam which can be recycled by providing a means for cutting the excess or slurry remaining after the cutting operation to a predetermined size or smaller and collecting it.

The present invention provides a cutting machine using a hot wire as a cutting method using a hot wire in view of the basic principle that the extruded foam is melted at an appropriate temperature or more in order to achieve the above object, and provides a material that is an extruded foam material It adopts the method of cutting the extruded foam to be cut to a predetermined size by moving the cutter to the right position, and the cutting machine is arranged with the heating wire to the appropriate size, and the up and down mechanism for raising or lowering the cutter. Provided is a device consisting of a combination of a conveying mechanism for conveying the prepared foam to an appropriate position before and after cutting, and a cutting collecting mechanism for processing excess left after cutting.

First, the present invention will be described in more detail with reference to the accompanying drawings.

First, the device of the present invention, as shown in FIG. 1, ascending or descending the cutter 3 and the cutter 3 made to move up and down on a guide rod 2 installed adjacent to the vertical frame 1. It consists of a combination of the upper and lower operating mechanism (4), the transfer mechanism (5) for transferring the foam to the proper position before and after cutting, and the cutting collecting mechanism (6) for processing the excess remaining after the cutting operation.

As shown in FIGS. 1 to 7, the cutter 3 has a quadrangular shape in which two longitudinals 11, 11 ′ and two transverses 12, 12 ′ are attached to the support 13 of the corner portion. Heat wires 14 and 14 '(15 and 15') are respectively installed between the longitudinal sections 11 and 11 'and the transverse sections 12 and 12' that are fixed to each other and face each other. (15, 15 ') both ends of the support (11, 11') and the transverse (12, 12 ') is fixed to the fixed anchorage fixture (16, 17) is fixed.

Here, the support 13 is a rod hole 18 is drilled in the center, respectively, slidably fitted to the guide rod 2, respectively, and both ends of the chain 19 is fixed to the upper and lower sides, respectively.

The tungsten fixture 16 has a bracket 21 for fixing the heating wires 14 'and 15 on one side of the insulator 20 and a terminal 22 for connecting the heating wires 14' and 15 to the center and a power source. ) Is installed and the other side of the tanji rod (3) is made of a combination fixed, but the one side hole of the fastener body 24 fixed to the upper section (11, 11 ') and the lower section of the transverse (12, 12') (23) is slidably fitted and the spring 25 is supported on one side of the support rod 23 so that the heating wires 14 'and 15 can be firmly pulled from both sides, and the fixture body 24 is fixed. The rods 27 of the adjusting mechanism 26 may be fixed to the fixing body 24 by adjusting the cutting size by horizontally moving the heating wires 14 and 15 between the longitudinal lines 11 and 11 'and the transverse lines 12 and 12'. ) Can be combined.

The fixing mechanism 26 is the same shape as each other is installed on the upper one side of the longitudinal section (11, 11 ') and the lower one side of the transverse section (12, 12'), the longitudinal section (11, 11 ') or transverse section 12, 12 ') is installed between the fixing brackets (28, 28') of both sides fixedly rotatable without moving the screw rod 27 is screwed to the fixing sphere body 24 as described above and the screw rod ( A bevel gear 29 is arranged at one end of the bevel gear 27, and a bevel gear 31 is formed at the same time as the bevel gear 31 is engaged with the bevel gear 29 by fixing the bracket 28 at one side and the bearing 30 at the adjacent part. (32) of the end of the shaft (32) is provided with a control end (32a) formed of a hexagonal or quadrilateral and the like through the bevel gears (29, 31) engaged with each other by the rotation operation by the wrench of the screw rod (27) The horizontal movement of the fixture body 24 by rotation is attained.

The stopper fixture 17 is the same as the above described stopper fixture 16, except that the fastener body 24 has no configuration in which the screw rods 27 of the adjustment mechanism 26 are screwed together. Do.

The upper and lower actuating mechanisms 4 have sprocket wheels 41 and 41 'on both inner sides of the wheel case 40 fixed to the upper part of the vertical frame 1 and the upper part of the guide rod 2, respectively. Both ends of the support 13 are divided into upper and lower sides, and the chains 19 fixedly installed are engaged with each other, and the sprocket wheels 41 ″ are built on the lower part of the vertical frame 1 so that the chains 19 are formed. The sprocket wheel 41 ”is meshed with both sides of the operating shaft 42 embedded in the lower part of the vertical frame 1 on both sides, and bevel gears 43 and 43 'are respectively formed at one end of the sprocket wheel 41 ″. Bevel gears (45,45 ') (46,46') are formed at both ends of the intermediate shaft (44,44 ') installed on the bearing, and beveled with one bevel gear (43,43') and at the same time, the other bevel gear ( 45 ', 46') defined yen reversing motor (before freezing on both sides via a reduction gear 47 which is connected to the drive shaft and a chain of ₁ M) This is able to be.

At this time, the operation that the forward and reverse of the motor M ₁ is performed is a limit installed inside the vertical frame 1 which is operated by the pressing operation of the support 13 according to the raising and lowering operation of the cutter 3 described above. Changes can be made by switches LS ₁ and LS ₂ .

Next, the transfer mechanism 5 will be described.

The transfer mechanism 5 is to be operated by the rotation of a plurality of transfer rolls 51 arranged on the frame 50, these transfer rolls 51 are sprocket wheels 52, 53 arranged at the end ) and is the engaged with the power transmission by the chain (54) done, the sprocket wheel 53 chukseol at the ends of the feed rolls 51 located at the front end is a chain and a sprocket wheel 55 chukseol the drive motor (M ₂₎ By 56, the power transmission can be made, and the limit switch LS ₃ is installed at one end so that the extruded foam to be cut can be stopped at an appropriate position.

The cutting collection mechanism (6) is installed between the lower portion of the vertical frame (1) crossbars (1a, 1b) on the four periphery and between the crossbars (1a, 1b) a small cutting section arranged in a zigzag between And a feeding fan 62 on one side, an open space 63 in the center, a feeding passage 64 on the other side, and a suction duct 65 respectively provided below the base 61.

Thus, the extruded foam is cut off and the excess remaining falls on the heating wire 60 while falling to the lower portion, and the cut excess 66 is melted by self-weight, and the cut excess 66 falls into the open space 63 of the fan 62. In accordance with the driving, the suction duct 65 can be collected at a predetermined position via the rapid passage 64 while moving in one direction (see arrow in FIG. 9).

Unexplained 70 represents the exhaust duct.

Next, the present invention will be described with reference to a detailed description of the above-described apparatus and the flowchart shown in FIG. 10.

A method of cutting the extruded foam to be cut to a predetermined size by providing a cutter in which a heating wire is arranged in an appropriate range and adjusting the heating wire will be described in detail according to an operation procedure.

[First Embodiment]

With the cutter 3 positioned at the bottom, the drive motor M ₂ rotates while the feed-in material, which is roughly cut and laminated in a predetermined number, enters the drive motor, and a plurality of feed rolls 51 rotate to the inside of the apparatus. As the material proceeds and is transferred to the proper distance, the limit switch LS ₃ senses and at the same time stops the rotation of the drive motor M _{2 to} precisely position the extruded foam material to be cut to a predetermined size.

(See step 101 to step 103)

By the forward rotation of the forward and reverse motor (M ₁ ), the reduction gear 47, the bevel gears 45 'and 46', the intermediate shafts 44 and 44 ', the bevel gears 43 and 43', the working shaft 42, As the sprocket wheels 41, 41 ', 41 "and the chain 19 are driven, the cutter 3 rises, and the heating wires 14, 14', 15, 15 'installed inside the cutter 3 are molded. As the foam material comes into contact with each other, the molded foam material is melted. As the cutter 3 rises, the hot wires 14, 14 ', 15, and 15' also rise together, and the melt cutting of the material is completed. When 3) reaches the limit switch LS ₂ , the rise of the cutter 3 is stopped. (See steps 104 to 106)

At this time, the remaining excess 66 is cut by the cutting collecting mechanism 6 is discharged through the open space 63, the feeding passage 64 and the suction duct (65).

Next, the drive motor (M ₂ ) is rotated and the new laminated extruded foam material to be cut is introduced while the extruded foam material cut by the transfer roll 51 is introduced to the outside, and the limit switch (LS) is transported to an appropriate distance. ₃ ) detects this and at the same time the rotation of the drive motor (M ₂ ) is stopped to position the extruded foam material to be cut. (See steps 107 to 112)

Cutter 3 is the reverse rotation of the forward and reverse motor (M ₁ ) is started, the upper and lower operating mechanism (4) is lowered and the melt cutting of the extrusion molded foam material is made in accordance with the falling speed and the material is completely cut after the cutter (3) is lowered in the limit switch when the leads to the (LS _1), the limit switch (LS ₁₎ is to detect this reverse information cutter motor (3), while the reverse rotation of the (M ₁₎ is still stopped. (See steps 113 to 115)

At this time, the remaining excess 66 is cut and collected by the cutting collecting mechanism (6).

The driving motor (M ₂ ) is rotated and the new laminated extruded foam material to be cut again and again is repeatedly entered while discharging the foam cut by the feed roll 51 to the outside, and the limit switch LS ₃ detects this. After the rotation of the drive motor (M ₂ ) is stopped, the work to be cut is placed in an exact position, and then the repetitive operation is continued. (See steps 116 to 118)

Second Embodiment

As already described in the first embodiment, the extruded foam material to be cut enters and is set in position, and then the cut and cut of the extruded foam material by raising the cutter 3 Unlike the first embodiment described above, after the operation of steps 101 to 108 where discharge is performed, the cutter 3 is lowered by the reverse rotation of the forward and reverse motor M ₁ as shown in FIG. 10B (step 201). ), The lowering stop of the cutter 3 (step 202) by the detection of the limit switch LS ₁ , and the entry of the extruded foam material to be cut (step 204), the driving of the motor M ₂ again occurs. The repetitive operation is followed by step 101, which is the first operation that takes place.

Although not shown separately in addition to the above-described embodiment, an embodiment in which the cutting is not made when the cutter 3 is raised, but only when the cutter 3 is cut, may be considered.

As described above, the extrusion-molded foam material is melt-cut when the cutter 3 is raised or lowered, and the cutter 3 includes four rod holes 18 formed at the center of the support 13. Extruded foam material is transported along with heating wires 14, 14 ', 15, and 15', which are firmly pulled by the spring 25, because the constant speed movement of the chain 19 is carried out and maintains the correct vertical state. The melt-cut surface while in contact with can maintain accurate straightness and smooth surface texture.

In addition, the cutting size of the material in the extruded foam formed by the intersection of the heating wires 14, 14 ', 15, and 15' can be made by horizontally moving the heating wires 14 'and 15 using the adjusting mechanism 26. When the bar 32 is inserted into the adjusting end 32a using a conventional wrench and the shaft 32 is rotated, the screw rod 27 is rotated through the bevel gear 31 and the bevel gear 29 to the screw rod 27. The fixed fastener main body 24 is horizontally moved by the screw rod 27. Accordingly, the heating wires 14 'and 15' are horizontally moved while the heating wires 14 and 15 'are fixed. It is possible to have a cross size of the heating wire (14, 14 ', 15, 15') having a desired cutting size.

Therefore, the present invention extruded foam cutting method and apparatus adopts a melt cutting method by the insulated wire to form a smooth and straight cut surface is excellent quality and accurate dimensions after cutting, easy to manage tolerance, a large amount of As the laminated body is cut, productivity can be improved and at the same time, it can be easily made at the time of raising and lowering the cutter according to the method of use, so it is easy to use and the extra processing generated after the cutting operation can be easily performed by the cutting collecting mechanism. It has such an excellent effect.

Finally, the present invention can be variously modified as shown in various embodiments as already mentioned, but when such various changes are consistent with the technical spirit of the present invention, various modifications as described above will be described later. It is intended that it be within the scope of the claims.

Claims (8)

Cutter (3) made to be able to move on the guide rod (2) installed adjacent to the vertical frame (1), the chain 19 is fixed to the upper and lower ends of the support 13, the working shaft 42 and the intermediate shaft (44, Upper and lower actuating mechanisms 4 and extruded foams for raising and lowering the cutter 3 by means of bevel gears 43, 43 '(45, 45') (46, 46 ') that are permanently fitted to 44'). In the cutting device of the extruded foam consisting of a conveying mechanism (5) for transporting to a suitable position before and after cutting, the cutter (3) is a longitudinal section (11, 11 ') and transverse (12, 12') support 13 And the heating wires (14, 14 ') (15, 15') so that both ends of the ends (11, 11 ') and transverse (12, 12') are supported and fixed to the anchorage fixtures (16, 17). These are respectively installed, the transfer mechanism 5 is rotatably installed a plurality of isol roll 51 arranged on the frame 50 and the transfer roll 5 is sprocket wheel 52, 53 arranged on one side end ) And the chain (54) engaged with Rocket chain 53 has a drive motor (M ₂₎ of the sprocket wheel 55, and power is provided so as to pass the yirwoji by the chain 56, the bar between the lower portion of the vertical frame (1), (1a, 1b) chukseol in On the circumference of four sides and arranged between the crossbars (1a, 1b) zigzag between the heating wires 60, a feeding fan 62 on the lower side of the base 61, the open space 63 in the center Cutting device for cutting an extruded foam, characterized in that comprises a cutting collecting mechanism (6) provided with a feed passage (64) and a suction duct (65) of the other side, respectively. The support 13 of the cutter 3, the rod hole 18 is drilled in the center to be slidably fitted to the guide rod 2, the upper and lower ends of the chain 19 is fixed The fastener 16 is fixed to a bracket 21 for fixing the heating wires 14 'and 15 on one side of the insulator 20, and a terminal for connecting the heating wires 14' and 15 to the center and a power source ( 22) is installed and the other side of the tanji rod 23 is fixedly coupled to the other side of the upper (11, 11 ') and the lower side of the transverse (12, 12') is a fastener body 24 is installed in the hole of the rod (23) is slidably fitted and the spring 25 is supported on one side of the support rod 23 to pull the heating wires 14 ', 15 firmly on both sides and the fixed body 24 is adjusted to the interval ( 11, 11 ') and transverse (12, 12') cutting device of the extruded foam, characterized in that the screw rod 27 of the adjustment mechanism 26 is made to be screwed to the fastener body (24). The fixing mechanism (26) according to claim 1 or 2, wherein the adjusting mechanism (26) is identical in shape to each other between the fixing brackets (28, 28 ') fixed to the longitudinal sections (11, 11') and the transverse sections (12, 12 '). Screw rods 27 installed to be rotatably inserted without moving in position are screwed to the fixture body 24, and bevel gears 2 are formed at one end of the screw rods 27 and adjacent to one bracket 28 '. The bevel gear 31 which is engaged with the bevel gear 29 is fixed by fixing the yen bearing 30, and at the same time, an adjusting end 32a is provided at the end of the shaft 32 of the bevel gear 31. Apparatus for cutting extruded foam, characterized in that the operation can be made. 4. The extruded foam according to claim 3, wherein the stopper fixture 17 is the same as the stopper fixture 16, but the fastener main body 24 is not screwed with the screw rods 27 of the adjustment mechanism 26. Cutting device. It is characterized in that the hot wire is provided with a cutter disposed in an appropriate range, the extruded foam material is placed in position, and then the cutter is moved to melt-cut the foam material to a predetermined size while the foam material is in contact with the hot wire. Cutting method of the extrusion molded foam. (1) The laminated foam material is positioned at a predetermined position by the drive motor M ₂ , the transfer roll 51, and the limit switch LS ₃ , and (2) the cutter 3 is raised to raise the heating wire 14, 14 ', 15, 15') and the foam material is in contact with the melt is cut and the rise of the cutter (3) is stopped by the limit switch (LS ₂ ), (3) the foam cut by the feed roll (51) The new laminated foam material to be discharged to the outside and cut again is inserted into the predetermined position by the limit switch LS ₃ , and then (4) the cutter 4 is lowered to heat the wires 14, 14 ′ and 15. , 15 ′) is melted and the lowering of the cutter 3 is stopped by the limit switch LS ₁ , and (5) the foam cut by the feed roll 51 is discharged to the outside and cut again. by entering a new laminated foam material when the limit switch position to a predetermined position by (LS ₃₎ A method of cutting an extrusion molded foam which comprises a series of repeatable successive batch processes. The method of claim 6, wherein the laminated foam material is positioned in a predetermined position by the transfer roll 51 and the limit switch LS ₃ and the cutter 3 is raised to heat the wires 14, 14 ', 15, 15'. Melt cutting is carried out by the limit switch LS ₂ stops the rise of the cutter 4 and discharges the foam cut by the feed roll 51 to the outside, and then lowers the cutter 4 to limit the switch ( LS ₁ ) extrusion molding characterized in that it consists of a series of repetitive continuous batch processes for entering a new laminated foam material to be cut with a stop motion by LS ₁ ) and positioning it to a predetermined position by a limit switch LS ₃ . Cutting method of the foam. 8. The spare 66 is opened by the hot wire 60 after the melt cutting of the foam material by the hot wires 14, 14 ', 15, 15' of the cutter 3 is made. A method of forming an extruded foam, characterized in that the melt 63 is cut into the space 63 in a small size and can be discharged via the quick passage 64 and the suction duct 65 according to the driving of the fan 62.

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