Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/30—Extrusion nozzles or dies
  • B29C48/3001—Extrusion nozzles or dies characterised by the material or their manufacturing process
  • B29C48/3003—Materials, coating or lining therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B28—WORKING CEMENT, CLAY, OR STONE
  • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
  • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
  • B28B11/14—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/001—Combinations of extrusion moulding with other shaping operations
  • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
  • B29C48/07—Flat, e.g. panels
  • B29C48/08—Flat, e.g. panels flexible, e.g. films
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/92—Measuring, controlling or regulating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2793/00—Shaping techniques involving a cutting or machining operation
  • B29C2793/0027—Cutting off
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2793/00—Shaping techniques involving a cutting or machining operation
  • B29C2793/0063—Cutting longitudinally
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92009—Measured parameter
  • B29C2948/9218—Weight
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92323—Location or phase of measurement
  • B29C2948/92438—Conveying, transporting or storage of articles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92504—Controlled parameter
  • B29C2948/92609—Dimensions
  • B29C2948/92628—Width or height
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92504—Controlled parameter
  • B29C2948/92609—Dimensions
  • B29C2948/92638—Length
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92504—Controlled parameter
  • B29C2948/92609—Dimensions
  • B29C2948/92647—Thickness
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92504—Controlled parameter
  • B29C2948/92676—Weight
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92504—Controlled parameter
  • B29C2948/92685—Density, e.g. per unit length or area
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92819—Location or phase of control
  • B29C2948/92923—Calibration, after-treatment or cooling zone
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2003/00—Use of starch or derivatives as moulding material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
  • B29K2105/26—Scrap or recycled material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
  • B29K2995/0037—Other properties
  • B29K2995/0072—Roughness, e.g. anti-slip
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2007/00—Flat articles, e.g. films or sheets
  • B29L2007/002—Panels; Plates; Sheets

Definitions

• the invention relates to a method and an apparatus for cutting a sheet of composition for a starch bowl in a fixed quantity.
• the invention relates to a method and an apparatus for cutting a sheet of composition for a starch bowl in a fixed quantity, wherein the method and the apparatus can be served as an automatic and mass-production process for making a sheet of gelatinated composition for a starch bowl and cutting the sheet in a fixed quantity to have predetermined size and mass, and in particular a density of produced unit sheets is uniform and a mass difference between the unit sheets is reduced significantly.
• composition for forming a starch bowl is subject to a foaming process when formed. Accordingly, even when an amount of the composition becomes different a little, a bowl in a mold is not formed properly so that it is treated as inferior products.
• the gelatinated composition for starch bowl should be quantified and then supplied to the mold. If the mass difference between the quantified unit amounts is getting smaller, then the higher formability and quality of the starch bowl is obtained.
• the quantifying process has been manually conducted. That is, typically, an operator personally kneads a source material of composition for a starch bowl and divides it into unit amounts.
• the invention is for solving the problems, and an object of the invention is to provide an automatic and mass-production method and apparatus for cutting a composition sheet for a starch bowl in a fixed quantity which are capable of quantifying a composition for a starch bowl and supplying the quantified composition into forming, wherein cutting an extruded sheet in a fixed quantity is easy and smooth, and an overall density of the cut unit sheets is uniform, and a mass difference between the unit sheets can be reduced significantly.
• a method for cutting a composition sheet for a starch bowl in a fixed quantity comprising steps of: providing a source material of composition for a starch bowl (Sl); extruding the source material to produce a sheet (S2); introducing the sheet into a pressing roll and rolling the sheet to uniformalize a density of the sheet (S3); cutting the sheet of uniform density, which has passed the pressing roll, in a longitudinal direction, thereby providing an intermediate unit sheet (S4); and cutting the intermediate unit sheet in a transverse direction, thereby providing a final unit sheet (S5).
• the method further comprises a step of measuring a mass of the final unit sheet and delivering the final unit sheet to an arrangement device when the measured mass meets a set criterion (S6-1); and measuring a mass of the final unit sheet and returning the final unit sheet to the extruder when the measured mass does not meet a set criterion (S6-2).
• a Teflon coating is carried out so as to provide a slipping property to an outlet of the extruder.
• step S3 rollings are carried out 2-5 times.
• the number of the pressing rolls is adjusted to correspond to a gelatinated degree of the composition constituting the sheet.
• the sheet in the step S3, the sheet is introduced in the pressing roll while both sides of the sheet are guided with side rolls so as to reduce a density deviation of the both sides of the sheet.
• step S3 side plates are provided to both sides of the pressing roll and the sheet is rolled between the side plates of the both sides, so as to reduce a density deviation of the both sides of the sheet when the sheet is introduced in the pressing roll.
• the sheet is cut in the longitudinal direction with a rotary cutting knife.
• the sheet in the step S4, is guided by guide conveyor belts, the number of which is the same as the number of the intermediate unit sheets to be cut in the longitudinal direction, before the sheet is cut in the longitudinal direction.
• the sheet in the step S4, is subject to a further rolling process with a pressing rod while it is guided by the guide conveyor belt.
• the rotary cutting knife is Teflon-coated so as to prevent the composition for a starch bowl having an adhesive propery from being attached to the rotary cutting knife.
• the intermediate unit sheet is cut in the transverse direction with a flat cutting knife.
• step S5 repeated is a process wherein the flat cutting knife descends vertically, moves at a same speed as a delivery speed of the intermediate unit sheet by a predetermined distance under state that it is inserted in the intermediate unit sheet, ascends vertically, moves backward and then again descends vertically.
• the flat cutting knife is Teflon-coated so as to prevent the composition for a starch bowl having an adhesive propery from being attached to the flat cutting knife.
• step S6-1 when the final unit sheet meets the set mass measurement criterion after the mass measurement, the final unit sheet is moved to the arrangement device with riding on the conveyor belt.
• step S6-2 when the final unit sheet does not meet the set mass measurement criterion after the mass measurement, the final unit sheet is removed from the conveyor belt through an air injection, and the removed final unit sheet is passed to a guide case, moved to a return belt and then delivered to the extruder using the return belt.
• an apparatus for cutting a composition sheet for a starch bowl comprising a device for providing a source material of the composition for the starch bowl; a device for extruding the source material provided from the device for providing a source material into a sheet; a rolling device having a pressing roll for uniformalizing a density of the sheet extruded from the extruding device; a longitudinal cutting device for cutting the sheet of uniform density rolled in the rolling device in a longitudinal direction, threreby providing an intermediate unit sheet; and a transverse cutting device for cutting the intermediate unit sheet in a transverse direction.
• the apparatus further comprises a device for measuring a mass of the final unit sheet; and a non-quantified final unit sheet return device for returning the non-quantified final unit sheet to the extruding device when the final unit sheet does not meet a set criterion.
• the extruding device comprises an extruder for extruding the sheet and an outlet of the extruder is Teflon- coated.
• the number of the pressing rolls of the rolling device is 2-5.
• the number of the pressing rolls of the rolling device is adjusted to correspond to a gelatinated degree of the composition constituting the sheet.
• the rolling device is further provided with side rolls for introducing the sheet into the pressing roll while guiding both sides of the sheet, so as to reduce a density deviation of the both sides of the sheet.
• the rolling device is further provided with side plates to both sides of the pressing roll and the sheet is rolled between the side plates of the both sides, so as to reduce a density deviation of both sides of the sheet.
• a longitudinal cutting knife of the longitudinal cutting device is a rotary cutting knife.
• the longitudinal cutting device is further provided with guide conveyor belts, which is for guiding the sheet before the longitudinal cutting and mounted to have the same number as the number of intermediate unit sheets to be cut.
• the longitudinal cutting device is further provided with a pressing rod for rolling the sheet while the sheet is guided by the guide conveyor belts.
• the rotary cutting knife is
• Teflon-coated so as to prevent the composition for the starch bowl having an adhesive property from being attached to the rotary cutting knife.
• a transverse cutting knife of the transverse cutting device is a flat cutting knife.
• repeated is a process wherein the flat cutting knife descends vertically, moves at a same speed as a delivery speed of the intermediate unit sheet by a predetermined distance under state that it is inserted in the intermediate unit sheet, ascends vertically, moves backward and then again descends vertically.
• the flat cutting knife is
• Teflon-coated so as to prevent the composition for a starch bowl having an adhesive propery from being attached to the flat cutting knife.
• the device for measuring a mass of the final unit sheet and the non-quantified final unit sheet return device comprises a device for measuring a mass of the final unit sheet; an air injection device for removing a non-quantified final unit sheet which does not meet the set criterion from the conveyor belt after the mass measurement; a guide case to which the the non- quantified final unit sheet removed by the air injection passes; and a return belt for returning the non-quantified final unit sheet having passed to the guide case to the extruder.
• the extruded sheet can be easily and smoothly cut in a fixed quantity and the overall density of the cut unit sheet is uniform. Further, there is little or no mass difference between the unit sheets. As a result, it is possible to significantly reduce the inferior products in forming.
• FIG. 1 is a flow chart for showing a procedure of the method for cutting a composition sheet for a starch bowl in a fixed quantity according to an embodiment of the invention
• FIG. 2 is a schematic view showing an apparatus for cutting a composition sheet for a starch bowl in a fixed quantity according to an embodiment of the invention
• FIG. 3 is an enlarged view showing a rolling device of FIG. 2;
• FIG. 4 is an enlarged view showing a front side part of a longitudinal cutting device of FIG. 2;
• FIG. 5 is an enlarged view showing a rear side part of a longitudinal cutting device of FIG. 2;
• FIG. 6 is a schematic view showing an operating principle of a flat cutting knife of a transverse cutting device. Mode for the Invention
• a longitudinal cutting is meant by cutting a composition sheet for a starch bowl in a direction parallel to an advancing direction of the sheet when the sheet is advanced with riding on a conveyor belt.
• a transverse cutting is meant by cutting the sheet in a direction perpendicular to the advancing direction of the sheet.
• an intermediate unit sheet is meant by a sheet obtained by extruding composition for a starch bowl from an extruder to make a sheet and cutting the sheet in a longitudinal direction.
• a final unit sheet is meant by a unit sheet having a rectangular shape after cutting the intermediate unit sheet in a transverse direction finally.
• a rolling is meant by rolling the composition sheet for the starch bowl with a pressing roll or pressing rod when the sheet is advanced with riding on the conveyor belt.
• a gelatinated composition for a starch bowl is made to be a sheet and the sheet is rolled with a pressing roll, so that an overall density of the sheet, including both sides thereof, is made to be uniform, the sheet is cut in longitudinal and transverse directions, a mass of the cut final unit sheet is measured and then the sheet is passed to a next process only when the sheet meets a predetermined criterion. Accordingly, it is possbile to increase a work efficiency and a productivity and to significantly decrease a rate of inferior products because a density of the unit sheet is uniform and there is little or no mass difference between the unit sheets.
• Fig. 1 is a flow chart for showing a procedure of a method for cutting a composition sheet for a starch bowl in a fixed quantity according to an embodiment of the invention.
• a source material of composition for a starch bowl is provided so as to form a starch bowl (Sl), and then extruded using an extruder, thereby forming a sheet (S2).
• source materials of starch, pulp and necessary additives are stored and mixed with water. Further, the mixture are kneaded so as to be mingled evenly, and then gelatinated. The mixing is carried out in a double jacket mixer and a temperature is adjusted to be 70- 100 0 C.
• the extruding is carried out to make a sheet of the source material. Using the extruder, the gelatinated composition is formed into a sheet having uniform thickness and width.
• the sheet is introduced to be rolled in a pressing roll so that a density of the sheet becomes uniform (S3).
• the number of the rolling can be changed to correspond to the gelatinated degree of the composition.
• the composition is gelatinated within a typical range (water content: 30-80 wt%), it is preferred to carry out the rolling process 2-5 times.
• an overall density of the sheet is not uniform.
• a process line of the apparatus is prolonged and thus an exposure time to the air is extended, so that the water content of the gelatinated composition is highly lowered.
• a formability is deteriorated in manufacturing the starch bowl.
• the rolling is carried out 2-5 times, there occurs no mass deviation between the cut unit sheets. Accordingly, there is no problems in the mass production and forming.
• the rolling is carried out 3 times or more, highly uniform density can be ensured.
• a rotary cutting knife is preferably used to carry out the longitudinal cutting.
• the reason is as follows: in the case that a flat cutting knife is used, a contact surface between the cutting knife and the gelatinated composition sheet is large or a contact time is long, which are disadvantageous after the cutting.
• the flat cutting knife is used to carry out the longitudinal cutting, the gelatinated composition is not smoothly removed from the cutting knife, so that the composition is partially attached to the cutting knife. Accordingly, the cutting process is not smoothly carried out or there is a large mass deviation between the cut sheets. In light of this, it is not proper to use the flat cutting knife to carry out the longitudinal cutting. Therefore, in the quantified cutting method of the invention, it is particularly advantageous to use the rotary cutting knife when carrying out the longitudinal cutting.
• the intermediate unit sheet of uniform density which is longitudinally cut, is cut in a transverse direction, thereby providing a final unit sheet (S5).
• the transverse cutting is carried out to cut the intermediate unit sheet to have a desired length, which is longitudinally cut with riding on the conveyor belt.
• a flat cutting knife having a size of sheet width is used as a cutting knife. The reason is as follows: since the cutting direction is perpendicular to the process advancing direction, the knife itself should not be rotated or moved. If a rotary cutting knife is used to carry out the transverse cutting, the conveyor belt which moves the sheet should be stopped for the cutting and then get into work again, which is not efficient with regard to a non-stop process and a mass- production.
• the flat cutting knife carries out the transverse cutting in a manner of repeating following operations: it descends vertically to cut the intermediate unit sheet and moves at a same speed as the speed of the conveyor belt by a predetermined distance for which the cutting is carried out under state that it is inserted in the intermediate unit sheet, ascends vertically, moves backward and then descends vertically.
• measured is a mass of the final unit sheet of uniform density, which is cut in the longitudinal and transverse directions.
• the final unit sheet is delivered to the arrangement device (S6-1), and when the measured mass does not meet the set criterion, the final unit sheet is returned to the extruder (S6-2).
• the mass thereof is measured by a mass measuring device such as mass measuring sensor.
• a removal device such as air injector so that the non-quantified final unit sheet is not advanced to a next process.
• the non-quantified final unit sheet which is removed from the conveyor belt, is returned.
• the non-quantified final unit sheet is sent to the a guide case, it is delivered on a return belt through the guide case and then returned to the extruding device, which is in the first process, with riding on the return belt. Since the mass measuring device and the non-quantified final unit sheet return device are provided, it is possible to further reduce the rate of the inferior products in the final forming.
• FIG. 2 is a schematic view showing an apparatus for cutting a composition sheet for a starch bowl in a fixed quantity according to an embodiment of the invention.
• the apparatus 100 for cutting a composition for a starch bowl in a fixed quantity comprises a device 100 for providing a source material of composition for the starch bowl and an extruding device 120 for extruding the source material supplied from the device 100 to form a sheet.
• the extruding device 120 is provided with an outlet 121 in its exit part. If the outlet 121 is poor in a slipping property, the gelatinated composition sheet is non-uniformly discharged. Accordingly, in order to provide a slipping property, a Teflon coating is carried out for the outlet 121.
• the extruded sheet is sent to a rolling device 140 having a pressing roll 141.
• the sheet having passed to the rolling device 140 is delivered to a longitudinal cutting device 150 having a plurality of rotary cutting knifes 151 mounted to a rotating axis 152, through a conveyor belt 130.
• the intermediate unit sheet having passed to the longitudinal cutting device 150 is delivered to a transverse cutting device 160 haivng a flat cutting knife 161 which is moved by a front and rear and vertical delivery device 162.
• the final unit sheet having passed to the transverse cutting device 160 is mass- measured in a mass measuring device 170 and then delivered to a non-quantified final unit sheet delivery device 180 having an air injection device 182, a guide case 181 and a delivery belt 183.
• FIG. 3 is an enlarged view showing a rolling device of Fig. 2.
• side rolls 143 for guiding both sides of the sheet so as to reduce a density deviation of the both sides of the sheet are provided before the pressing roll 141 of the rolling device 140.
• the side rolls 143 guide the both sides of the sheet to reduce the density deviation of the both sides of the sheet.
• both sides of the pressing roll 141 are provided with side plates 142 so as to reduce the density deviation of the both sides of the sheet. Since the sheet is rolled between the side plates 142, the density deviation of the both sides of the sheet contacting the side plates 142 is reduced.
• the surface of the pressing roll 141 should not be formed with a pattern so as not to give a mass deviation.
• an embossing roll gives a mass deviation.
• the number of rolling (or number of pressing rolls) can be adjusted to correspond to a gelatinated degree of the composition as described above, and is preferably 2-5 times. For the adjustment, it is preferred to mount 2-5 pressing rolls.
• FIG. 4 is an enlarged view showing a front side part of a longitudinal cutting device having a rotary cutting knife of Fig. 2
• Fig. 5 is an enlarged view showing a rear side part of the device.
• the longitudinal cutting device 150 cuts the sheet in the longitudinal direction, i.e., sheet advancing direction, thereby obtaining a desired width.
• the longitudinal cutting device 150 is provided with plural rotary cutting knifes 151 to the rotating axis 152.
• the number and interval of the rotary cutting knifes 151 are adjusted to correspond to the number and width of the sheet to be cut.
• the longitudinal cutting device 150 is provided with guide conveyor belts 154 before the longitudinal cutting so that there occurs no shaking of the sheet when the sheet is cut.
• the number of the guide conveyor belts 154 corresponds to the number of the intermediate unit sheets to be cut in the longitudinal direction. Accordingly, required are the guide conveyor belts 154 as many as the sheets to be cut in the longitudinal direction.
• the width of the guide conveyor belts 154 is slightly narrower than that of the intermediate unit sheet to be cut in the longitudinal direction. That is, although the width of the guide conveyor belts 154 is made to approximately same as that of the intermediate unit sheet so as to prevent the shaking of the sheet as much as possible, if the two widths are same, there may occur friction between the guide conveyor belts 154. Accordingly, in order to prevent the friction from occurring, the width of the guide conveyor belts 154 is made to be slightly narrower than that of the intermediate unit sheet.
• a small pressing rod 153 is provided so as to further roll the sheet during the advancing of the guide conveyor belt 154.
• the rotary cutting knife 151 is made of stainless steel (STS).
• the stainless steel is preferably Teflon-coated to give a releasing property from the composition.
• the rotary cutting knife is preferably rotated at a same speed as that of the conveyor belt moving the sheet. The reason is that when it is rotated at a speed faster or slower than that of the conveyor belt, the gelatinated composition constituting the sheet is attached to the cutting knife.
• FIG. 6 is a schematic view showing an operating principle of a flat cutting knife of a transverse cutting unit of Fig. 2.
• the intermediate unit sheet (S) which has been cut in the longitudinal direction with riding on the conveyor belt is cut into a desired front and rear length in the transverse cutting device.
• the flat cutting knife 161 vertically descends, is inserted in the intermediate unit sheet (S) and then moves in the process advancing direction at the speed same as that of the conveyor belt. Then, when the cutting knife 161 is moved as the desired length, the cutting knife 161 vertically ascends and moves in the opposing direction to the sheet advancing direction by a desired length, and repeats the vertical descending and ascending operations.
• the flat cutting knife 161 is also made of stainless steel (STS) as the rotary cutting knife 151.
• the Teflon coating is carried out to give a releasing property from the composition in the intermediate unit sheet (S).
• Table 1 shows a mass deviation measurement result of the comparative example.
• Table 2 shows a mass deviation measurement result of the example 1.
• Table 3 shows a mass deviation measurement result of the example 2.
• Table 4 shows a mass deviation measurement result of the example 3.
• the invention relates to a method and an apparatus for cutting a sheet of composition for a starch bowl in a fixed quantity, wherein the method and the apparatus can be served as an automatic and mass-production process for making a sheet of gelatinated composition for a starch bowl and cutting the sheet in a fixed quantity to have predetermined size and mass, and in particular a density of produced unit sheets is uniform and a mass difference between the unit sheets is reduced significantly.

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• 2005
  • 2005-06-29 KR KR1020050057063A patent/KR100689583B1/ko active IP Right Grant
  • 2005-12-16 WO PCT/KR2005/004362 patent/WO2007001110A1/en active Application Filing

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