WO1995006557A1 - Procede et appareil de moulage par extrusion - Google Patents
Procede et appareil de moulage par extrusion Download PDFInfo
- Publication number
- WO1995006557A1 WO1995006557A1 PCT/JP1993/001906 JP9301906W WO9506557A1 WO 1995006557 A1 WO1995006557 A1 WO 1995006557A1 JP 9301906 W JP9301906 W JP 9301906W WO 9506557 A1 WO9506557 A1 WO 9506557A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- extrusion
- back pressure
- die
- extrusion molding
- change
- Prior art date
Links
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
- B29C48/03—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
- B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
-
- 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
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92085—Velocity
-
- 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
- B29C2948/92514—Pressure
-
- 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
- B29C2948/92571—Position, e.g. linear or angular
-
- 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
- B29C2948/9258—Velocity
-
- 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
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
-
- 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
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
-
- 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
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
-
- 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
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
-
- 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
- B29C2948/92933—Conveying, transporting or storage of articles
Definitions
- the present invention relates to an extrusion molding method for obtaining a good molded product having no dimensional error or variation in quality with respect to an extruded product whose cross-sectional shape changes with the length.
- Extrusion molding is used to manufacture long rubber products. Extrusion molding is performed by kneading molding materials such as rubber, PP (polypropylene), PVC (polychlorinated vinyl), etc. with a screw while plasticizing them, and extruding from an extrusion die having an opening corresponding to the product shape. This is a molding method in which a desired shape is obtained by extruding.
- the molding material may be continuously extruded from a fixed die having an opening of a certain shape, but the cross-sectional shape of the molded product increases with the length.
- it is necessary to change the shape and area of the die opening in accordance with the cross-sectional shape of the product.
- extruded product examples include user strips for automobile pods shown in FIGS. 9 ((), 9 (B), 9 (C) and 10.
- the weather strip 50 is attached to the periphery of the windshield 42 of the vehicle body 40, and has side portions 5 2 along both sides of the windshield 42.
- the upper part 54 along the upper edge of the windshield 42 is extruded as a single piece, as shown in FIG.
- the side part 52 has a cross-section in which a partition wall 52a is provided in the middle in order to prevent rainwater from flowing to the side surface of the automobile body 140. It has a shape.
- the upper portion 54 does not have this partition, and has a smaller cross-sectional shape than the side portion 52. Therefore, in the extrusion molding of the laser strip 50, the molding process for one product (one cycle) ), It is necessary to change the cross-sectional shape as shown in FIG.
- a movable die 208 capable of changing the shape of the die opening 210 is provided on the die 204 of the extruder 201.
- the movable die 208 is composed of two movable dies that can move in directions orthogonal to each other.
- the vertical dimensions in Figs. 9 ( ⁇ ) and 9 (C) are defined by the positions of the 10,000 movable dies, and the positions of the other excitable dies determine Figs. 9 ( ⁇ ) and 9 ((). C)
- the shape of the constriction in the left-right direction is specified.
- the structure of the extrusion contact having such two movable dies is the same as that described in, for example, Japanese Patent Application Laid-Open No. 4-356612 / 1996.
- the position of the movable die 208 is moved by a control mechanism (not shown) in synchronization with the extrusion of the extrusion screw S, and the shape of the die opening 210 is changed to the cross-sectional shape 52 in FIG. 9 ( ⁇ ). It changes between the cross-sectional shapes 54 of 9 (C).
- the movable die 208 moves in accordance with the cross-sectional profile of the molded product, and the area of the die opening 210 changes, so that it is added to the extruded molding material.
- the pressure inside the fixed die hereinafter referred to as “back pressure”
- the discharge amount from the die opening city 210 fluctuate.
- the increase or decrease of the screw rotation speed is not always controlled so that the obtained back pressure is constant, but is controlled so as to be an optimum back pressure according to the cross-sectional shape of each part.
- FIG. 12 (A) shows how the back pressure near the die opening 210 and the head pressure near the tip of the extrusion screw S change with the operation of the movable die 208 in FIG.
- FIG. 12 (B) is a diagram showing a state of a change in the pressure and a head E with a change in the rotation speed of the extrusion screw S.
- the back pressure is set by a pressure sensor 206 installed near the die opening 210 of the extrusion molding set 201 shown in Fig. 11, and the head pressure is set near the tip of the extrusion screw SO.
- the pressure is measured by the pressure sensors 228 respectively.
- the screw rotation speed 66 is controlled after a change 68 in the back pressure 62 is measured near the die opening due to a change in the die opening area 60, so that the time delays T ss , T s «exists.
- the time delays T S6 and T 5 S occur, and the back pressure 62 cannot be kept constant. For this reason, there has been a problem that in the back pressure fluctuation portions 70 and 72, errors in the cross-sectional dimensions of the compact and variations in quality occur.
- the present invention proposes an extrusion molding method capable of stably obtaining a good extruded product having a predetermined cross-sectional shape and having no variation in quality without wasting a molding material.
- the first invention provides a die capable of changing the shape of the opening, An extrusion device having an extrusion device for extruding a molding material into the die, a preliminary step of determining an allowable value of a physical quantity relating to the molding material in the die in advance corresponding to the shape of the opening of the die, and An extrusion molding method characterized by having an extrusion molding step of performing extrusion molding while controlling an extrusion device so as to obtain an allowable value.
- an allowable value for a physical quantity relating to a molding material in a die is determined in advance in a preparatory step prior to extrusion molding.
- This physical quantity serves as a chandelier that the quality of the extruded product obtained by extrusion is within an appropriate range. Then, the extrusion apparatus is controlled so that the allowable value is obtained, and the extrusion is performed.
- the second invention is characterized in that, in the extrusion method according to the first invention, the capability of the extrusion device is adjusted to increase or decrease prior to the timing of changing the shape of the opening of the die.
- the third invention is characterized in that, in the extrusion molding method according to the first invention or the second invention, the extrusion device is controlled by changing the rotation speed of the extrusion screw in the extrusion device. .
- the extrusion conditions of the extrusion device can be quickly and precisely controlled, so that more precise control is possible.
- the fourth invention is the extrusion method according to the third invention, wherein the physical quantity is measured while changing the rotational speed of the extrusion screw in advance at a predetermined timing, and the change in the screw rotational speed and the physical quantity are measured.
- the method is characterized in that the difference in timing of the change is determined in advance, and the extruder is controlled in advance of the difference in timing.
- the extruder since the extruder is controlled earlier by the timing difference between the change in the rotational speed of the screw and the change in the physical quantity, which is obtained in advance, the physical quantity changes at an appropriate timing. A molded article can be obtained stably.
- the fifth invention is the extrusion method according to the first, second, third, or fourth invention, wherein the pressure inside the die as a physical quantity (hereinafter, also referred to as “back pressure J”).
- This back pressure is an amount that changes in response to a change in the discharge amount of the molding material.
- the sixth invention is the extrusion molding method according to the first, second, third, fourth or fifth invention, wherein the allowable value of the physical quantity corresponds to a change in the shape of the opening. It features changing.
- the allowable value may be different for each portion where the shape of the opening changes. Therefore, by changing the allowable value of the physical quantity in accordance with the change in the opening shape, it is possible to perform more accurate ⁇ ⁇ control.
- the seventh invention is the extrusion molding method according to the first invention, wherein a physical quantity is measured in an extrusion molding step, and a control condition of the extruder is set so that the measured physical quantity becomes an allowable value. It is characterized in that a step of correcting the above has been added. As a result, even when the physical quantity slightly deviates from the allowable value, it can be controlled accurately within the allowable range, and more precise control can be performed.
- the eighth invention is an extrusion molding apparatus having a die capable of changing the shape of an opening, and an extrusion apparatus for extruding a molding material into the die, wherein the opening of the die is previously formed.
- Allowable value setting means for setting the allowable value of the physical quantity of the molding material in the die determined according to the shape, and controlling the extruder so that the allowable value set in the allowable value setting means is obtained.
- This is an extrusion molding apparatus characterized by having an extrusion device control means.
- an allowable value for the physical quantity of the molding material in the die is set in advance by the allowable value setting means. This physical quantity serves as an evaluation index that the quality of the extruded product obtained by extrusion is within an appropriate range.
- the extrusion device is controlled by the extrusion device control means so as to obtain this allowable value, and extrusion is performed.
- FIG. 1 is a diagram showing a configuration of an extruder used in a first embodiment of an extrusion method according to the present invention.
- FIG. 2 is a diagram showing the contents of control according to the first embodiment of the extrusion molding method.
- FIG. 3 is a flowchart showing a procedure of a process for determining extrusion molding conditions in the first embodiment of the extrusion molding method.
- FIG. 4 is a diagram showing the contents of control by the second embodiment of the extrusion molding method according to the present invention.
- FIG. 5 is a diagram showing a configuration of an extruder used in the second and third embodiments of the extrusion molding method.
- FIG. 6 is a flowchart showing the procedure of the second embodiment of the extrusion molding method.
- FIG. 7 is a diagram showing the contents of control according to the third embodiment of the extrusion molding method.
- FIG. 8 is a flowchart showing the procedure of the third embodiment of the extrusion molding method.
- 9 (A), 9 (B), and 9 (C) are views showing a weather strip as an example of an extruded product whose cross-sectional shape changes with length.
- FIG. 10 is a diagram showing a change in the profile of the weatherstrip.
- FIG. 11 is a sectional view showing the internal structure of the extrusion molding machine.
- FIGS. 12 (A) and 12 (B) are diagrams showing the state of propagation of pressure fluctuation in the extrusion method of the conventional example.
- FIG. 13 is a diagram showing the fluctuation of the back pressure by the conventional extrusion molding method.
- the extrusion molding machine 101 mainly includes a molding raft main body 102 having a built-in extrusion screw and a fixed die 104 installed in front of the main body.
- a screw driving device 103 provided with a rotating motor, a rotating force transmission mechanism and the like is provided.
- the extruder screw (not shown) in the molding machine main body 102 is rotated by the screw driving device 103, and the molding material filled in the molding machine main body 102 is extruded while being kneaded.
- the fixed die 104 is provided with an opening 110 for narrowing and extruding the molding material into a predetermined cross-sectional shape.
- the fixed die 104 is provided with a movable die 108 for changing the shape and area of the opening 110 and a drive mechanism 112 for moving the movable die 108. ing.
- the movable die 108 is composed of two movable dies movable in directions orthogonal to each other.
- the detailed structure is the same as that described in the above-mentioned Japanese Patent Application Laid-Open No. 4-3566216.
- the cooling tank 11.4 is a device for passing the extruded molded body W to cool and solidify the molded body W heated due to mixing and the like during extrusion.
- the take-up device 118 is a device in which two pairs of take-up belts provided to face each other are driven by a plurality of rollers.
- the extruded molded body W comes out of the die opening 110, it is released from the pressurization and tries to expand from the die size (die squeezing).
- a predetermined cross-sectional dimension is maintained by adding and trapping. That is, the tensile force applied to the compact W by the take-off device 118, the back pressure applied to the molding material when the molding material is extruded from the die opening 110, the extrusion speed, and the die opening
- the final cross-sectional shape and dimensions of the extruded product W are determined by the dimensions of the part 110.
- the pulling force or the pulling speed of the pulling device 118 can be changed, in this embodiment, the pulling force of the pulling device 118 is constant.
- the dimensional accuracy of the product W is controlled by controlling the position of the movable die 108, controlling the rotation speed of the extrusion screw by the screw driving device 103, and the like. However, depending on the shape and material of the product, control to change the take-up speed at each part of the product or between products may be performed.
- a pair of encoders 116 is provided in front of the take-off device 118.
- the encoder 1 16 is a device that rotates the rotor by bringing it into contact with the side surface of the compact W, and monitors the take-up speed of the compact W from the number of rotations of the rotor.
- the molded product W is extruded in the direction perpendicular to the paper plane of FIG. 1 in the direction in which the cross-sectional dimension of the molded product W changes, and the width of the molded product W changes Therefore, the distance between the encoder 1 16 and the take-up device 1 18 can be kept constant.
- a cutting machine 120 is provided in front of the take-off device 118.
- the cutting machine 120 cuts the formed body W at predetermined lengths based on a signal of the take-up length of the formed body W measured by the encoder 1 16, and shown in FIG.
- the weather strip product 50 having a predetermined length is used.
- the take-off speed is constant, if the cutting timing is adjusted at the start of cutting by the cutting machine 120, only the signal of the take-up length by the encoder 116 will be obtained. Based on the above, it may be cut at a fixed length. However, when performing control for changing the take-off speed, it is necessary to link the cutting timing of the cutting machine 120 with the moving timing of the movable die 108.
- a back pressure sensor 106 is inserted into the fixed die 104 of the extruder 101 at the back of the movable die 108.
- the back pressure sensor 106 is a pressure sensor for measuring the pressure (back pressure) applied to the molding material inside the fixed die 104.
- the output signal line 106a is taken out and the central processing Unit (calculation hiding :) 1 24
- a control signal taper 124a is taken out and connected to the screw speed control unit 126.
- an electric motor 126 a is taken out from the screw speed control unit 126, and is connected to the screw driving device 103.
- two output signal lines 1 16a and 1 16b are taken out from the encoder 1 16 and the movable die control unit 1 22 and the cut-off T 1 It is connected to a drive mechanism (not shown).
- the movable die control unit 122, the central processing unit 124, and the screw speed control unit 126 are computer systems centered on a CPU (central processing unit) and RAM and ROM memory devices.
- the CPU, RAM, ROM, and the like are connected to each other by a data bus so that data can be transferred therebetween.
- these CPUs, RAM, ROM, etc. are connected to external output signal lines 116a, etc., external control signal lines 122a, 122b, etc., and to the input / output interface. Is connected.
- the two control signal lines 122 a and 122 b taken out from the movable die control unit 122 are connected to the central processing unit 124 and the movable die cleaning mechanism 112, respectively.
- the movable die of the extrusion molding machine 101 is based on the shape of the laser strip product 50 of FIG.
- the movement pattern DA of 108 is determined.
- preliminary extrusion is performed to determine the optimum value of the screw rotation speed, that is, the screw rotation speed at which the extruded product has a predetermined cross-sectional dimension.
- the movable die 108 is moved to the opening corresponding to the side portion 52 of FIGS. 9 (A), 9 (B), 9 (C), and 10 (DA 1 of FIG. 2 (A)).
- the screw rotation speed is variously changed.
- the extruded compact is taken off at a prescribed take-up speed by It is.
- the screw rotation speed and the back pressure value B measured by the back pressure sensor 106 are stored in the RAM of the central processing unit 124. Then, the value of the back pressure BP when the extruded cross-sectional dimension becomes the predetermined cross-sectional dimension of the side portion 52 is determined as the appropriate back pressure BP 0 for the side portion 52. ⁇
- the movable die 108 is moved to a position to be an opening (DA 2 in FIG. 2A) corresponding to the upper portion 54. Then, in the same manner, the back pressure BP and the shape of the extruded product are measured while performing continuous extrusion, and an appropriate back pressure for the upper portion 54 is determined.
- the pattern of the proper back pressure BP0 for the weatherstrip product 50 is determined as shown in FIG. 2 (B).
- This BP0 pattern is used as an index for obtaining an appropriate extruded product.
- the proper back pressure is measured only at the two parts, the rhinoceros and the upper part, but if the proper back pressure is also measured at the connection between them, more precise control can be performed. it can.
- This initial setting pattern R1 is a pattern obtained by connecting the values of the screw rotation speed R when the appropriate back pressure BP0 of each part is obtained.
- the change timing of the initial setting pattern R1 is determined by the movable timing of FIG. 2 (A).
- relative change timing of the die moving pattern DA are time T u, T 1 2, T J 3. as soon settings.
- the extruder 101 extrudes several cycles while changing the rotational speed of the extruding screw according to the thus determined screw rotational speed initial setting pattern R 1. At this time, the extruded compact is taken up by the take-up device 118 at the same take-up speed as that of the pre-extrusion.
- the actual bow removal speed is measured by the encoder 1 16 in FIG. Even if the take-up speed is set to the same value, it will shift depending on the state of the extruder 101 This is due to the fact that there may be cases. If the actual take-off speed is different from the take-up speed during pre-extrusion, the movable die movement pattern shown in (2) in Fig. 2 is modified to match this measured value.
- the value of the back pressure BF is continuously monitored by the back pressure sensor 106 similarly to the preliminary extrusion.
- the change in back pressure measured in this way is indicated by BP 1 in FIG. 2 (D).
- the obtained back pressure change pattern BP 1 matches at the side part but becomes excessive at the upper part. I have. That is, the back pressure difference ⁇ 1 between the side portion and the upper portion is larger than the appropriate value ⁇ 0.
- the change timing of each unit are both in the direction of late for the movable die moving pattern DA, time T 21, T 22, T 2S , are offset each by T 24. Based on this result, the screw rotation speed pattern R1 is modified.
- the screw rotation speed in the part of the head is reduced in order to keep the rise of the back pressure ⁇ ⁇ ⁇ ⁇ ⁇ 1 in the part of the upper part small and to match the appropriate back pressure BP0.
- the reduction width AR2 is made larger than the reduction width 1 in (C) of Fig. 2.
- the screw rotation speed change time is set earlier than the initial setting value, and the time T S1 , ⁇ 2, ⁇ 38 is set for the movable die movement pattern DA. , ⁇ Increase by 34 .
- the change pattern of the back pressure ⁇ ⁇ obtained by similarly performing the extrusion molding for several cycles is shown as ⁇ 2 in FIG. 2 (F).
- This back pressure pattern BP 2 almost coincides with the appropriate back pressure pattern B P 0 in FIG. 2 (B) and the size of the back E of each part and the change time.
- the conditions obtained by the pre-extrusion are reproduced, and a proper extruded product having a predetermined cross-sectional shape should be obtained. Accordingly, it is determined that the target extrusion molding conditions have been obtained, and extrusion molding is subsequently performed under these conditions to manufacture a product.
- FIG. 3 is a flowchart showing a procedure of a process for determining extrusion molding conditions in the extrusion molding method of the present embodiment.
- the control program shown in the flowchart of FIG. 3 is executed on the CPU and RAM of the central processing unit 124 of FIG.
- step S100 of FIG. 3 When the control is started in step S100 of FIG. 3, first, an initial value of a take-up speed, a movable die moving pattern, a proper back pressure pattern, and an initial setting pattern of a screw rotation number are input (step S100). S102). Then, a control signal is sent from the central processing unit in FIG. 1 to the screw rotation speed control unit, the screw control device 103 is operated, the extrusion screw is rotated, and extrusion molding is started. (Step S104).
- step S106 measurement data of the actual take-up speed of the molded body W by the encoder 116 is input (step S108).
- step S110 it is determined whether or not this take-up speed substantially coincides with the initial value (that is, the take-up speed at the time of preliminary extrusion) (step S110). If the determination is YES, then the change pattern of the back pressure BP (BP 1 in (D) of FIG. 2) measured by the back pressure sensor 106 is input (step S 112). This measured back pressure change pattern is compared with the previously input appropriate back pressure pattern BP 0 to determine whether the back pressure value and the change time of each part match (step S 1). 16).
- step S 1 18 it is determined whether or not it is necessary to modify other conditions, and if not, the processing is terminated (step S122), and the extrusion is performed according to the obtained conditions. .
- step S110 determines whether the movable die movement pattern DA is corrected in accordance with the actual take-off speed as described in the description of FIG. S 1 1 4). Then, the process proceeds to the back pressure measurement process in step S112.
- step S116 determines whether or not to end as it is.
- step SI 18 If it is not necessary to check the result of extrusion using the corrected screw rotation speed pattern, it is determined YES in step SI 18 and the arithmetic processing is terminated as it is (step S 122), and it is necessary to make corrections. In some cases, the determination is NO, and the processing of step S108 and subsequent steps is executed again.
- extrusion molding is performed under conditions where the appropriate back pressure is constant over the entire length of the extruded body.
- the extrusion molding method of the present embodiment is performed in an extrusion molding machine 1 shown in FIG.
- the extrusion molding machine 1 includes a molding machine main body 2 provided with an extrusion screw (not shown in FIG. 5) for kneading and extruding a molding material, and a fixed machine installed in front of the extrusion screw.
- the die 4 is mainly configured.
- the fixed die 4 has an opening of a predetermined shape for extruding the molded body in a predetermined shape. 10 is provided.
- the movable die 8 for changing the shape of the opening 10 and the drive unit 12 for moving the movable die 8 are attached to the fixed die 4.
- a cooling tank 14 is provided in front of the opening 10.
- the cooling tank 14 is a device for cooling and solidifying the extruded compact W by passing it.
- a take-up device 18 is provided in front of the cooling tank 14, and an encoder 16 is provided in front of the take-up device 18.
- the molded body W is extruded in a direction in which the cross-sectional dimension changes in a direction sandwiched by the take-off device 18.
- the encoder 16 and the take-up device 18 are provided with a mechanism whose interval changes in accordance with the width of the compact W.
- the pulling speed of the pulling device 18 is fixed, and the dimension control of the product W is performed by controlling the position of the movable die 8 and the inside of the molding machine main body 2. This is performed by controlling the rotation speed of the extrusion screw.
- a cutting machine 20 is provided in front of the take-up device 18.
- the molded body W is cut by the predetermined length measured by the encoder 16 by the cutting machine 20 to form a weather strip product 50 of a predetermined length.
- a head pressure sensor 28 is inserted in front of the extrusion screw (not shown) in the molding machine body 2.
- the head pressure sensor 28 measures a pressure in front of a screw in the molding machine main body 2, that is, a head pressure.
- the back pressure sensor 6 is inserted into the fixed die 4, but unlike the first embodiment, is provided at a position near the opening 10.
- the back pressure sensor 6 measures the back pressure near the die opening 10.
- Output signals di 6 a and 28 a are extracted from these pressure sensors 6 and 28, and are connected to a screw rotation speed control unit 24. From the screw speed control unit 24, a control signal line 24a is taken out and connected to the molding machine operation unit 26. Further, from the molding machine operation unit 26, the force line 26 1 oa is taken out and connected to a screw rotation motor (not shown) of the molding machine main body 2.
- two output signals di 16 a.16 b are taken out from the encoder 16, which are connected to the control unit 22 and the drive mechanism (not shown) of the lil-cut 20, respectively. .
- the control unit 22 and the screw speed control unit 24 are computer systems centered on a CPU (central processing unit) and a memory device g of RAM and ROM. They are connected to each other by a data bus so that they can transfer data.
- CPU, RAM, ROM and the like are connected to external output signal lines 16a and the like and external control signal lines 22a and 22b and the like at input / output interfaces.
- the two control signal lines 22a and 22b taken out of the control unit 22 are connected to the screw speed control unit 24 and the pivoting mechanism 12 respectively.
- the screw rotation speed is controlled so that the back pressure is constant in each part of the molded body.
- the value of the appropriate back pressure obtained for each of the sections having different cross-sectional shapes of the molded body in the same manner as in the first embodiment is substantially constant. That is, the proper back pressure in the present embodiment is a pattern that is constant over the entire length of the molded body, and the screw rotation speed SP is controlled as described below so that this pattern is realized.
- the position of the movable die 8 of the extruder 1 is fixed at the neutral position, and the screw rotational speed SP is changed to a predetermined value shown in FIG. 4 (B).
- One cycle of extrusion is performed by changing the pattern.
- the value of the rate of change of the rotation speed of the extrusion screw for canceling the fluctuation of the back pressure due to the change of the die opening area is predetermined. Based on the rate of change, the change pattern of the screw rotation speed S ⁇ ⁇ shown in Fig. 4 ( ⁇ ) is determined.
- the screw rotation speed SP is changed by changing the die opening area by actually moving the movable die. Extrusion is performed by changing the pattern.
- t lag time described above, by the amount of ⁇ t 4 is controlled so as to advance the timing for changing the rotational speed SP of the extrusion screw. Then, the change of the back pressure at this time is measured.
- the change timing of the screw speed SP is further adjusted accordingly. That is, as the back pressure P 12 in FIG. 4 (E), the if the change time of the screw rotation speed SP is too early, control lines to slow down the amount corresponding change timing of the premature time t 12, t 32 Will be The change timing as back pressure PM in FIG 4 (E) is the case yet slow, further hasten controlling only the change timing min this time delay t 14, t "is executed.
- the screw speed is increased by the actual time delay before the change in the rotation speed SP of the extrusion screw appears as a change in the back P, —The rotation speed SP is increased or decreased.
- the back pressure is reliably controlled to be constant without fluctuation of the back pressure due to the time delay.
- Fig. 4 shows an example in which the change in the screw speed SP is corrected once to eliminate the fluctuation in the back pressure Fx. If it remains, the timing of the change will be further corrected.
- the back pressure P can be reliably prevented from fluctuating without wasting molding material, and a homogeneous extruded product can be obtained.
- FIG. 6 is a flowchart showing a procedure for suppressing the fluctuation of the back pressure at the die opening in the extrusion molding method of the present embodiment.
- the control program shown in the flowchart of FIG. 6 is repeatedly executed at short time intervals on the CPU and RAM of the control unit 22 of FIG.
- step S10 of FIG. 6 When the control is started in step S10 of FIG. 6, first, it is determined whether or not there is data on the control timing of the optimum screw rotation speed for each change in the cross section of the compact (step S1). 2) If the data is stored in the memory unit (RAM or ROM) of the control unit 22, the determination in step S12 is YES, and the flow advances to step S14 to proceed to step S14. The evening is read into the RAM of the control unit 22 and the process proceeds to step S22 described later.
- step S12 determines whether the data is stored. If the data is not stored, the determination in step S12 is NO, and the flow advances to step S16 to perform an overnight measurement process of the optimal screw rotation speed control timing. .
- the movable die is set to the neutral position (step S16), and one cycle of extrusion is performed while changing the screw rotation speed at a predetermined extrusion speed (step S18). This is performed by measuring the time delay of the change in the back pressure with respect to the change in the rotational speed (step S20). The result of this processing, time delay t in FIG. 4 (C), the value of ⁇ t 4 sought.
- step S22 proceed to step S22 and use the control timing data read in step S14 or the time delay data measured in steps S16 to S20.
- Te as shown in FIG. 4 (D)
- an amount corresponding control to advance the change timing of the screw rotation speed of the time delay t ⁇ ⁇ t 4 is performed.
- extrusion is performed while moving the movable die.
- step S26 the control unit 22 waits for a movable die control start signal to be output from the control unit 22 to the drive mechanism 12, and then moves the movable die 8 to a predetermined program, that is, FIG. Extrusion is performed while moving in the pattern of (Step S2 8) 0
- step S30 the change in the back pressure Pi is measured by the back pressure sensor 6 as shown in FIG. 4 (E), and synchronization is confirmed (step S30). If the synchronization is not sufficient as shown in FIG. 4 (E), NO is determined in step S32, and the change period is corrected in step S3.
- step S32 becomes YES, and the process proceeds to step S36.
- step S36 determines whether the extrusion molding is terminated (step S38). ). If the molding end signal has not been input, the process returns to step S26, and the back pressure control is repeated.
- the extrusion molding method of the present embodiment is also performed in the extruder 1 shown in FIG. 5, as in the second embodiment. Also in the present embodiment, the screw rotation speed is controlled so that the back pressure measured near the die opening is constant over the entire length of the compact.
- the specific contents of the control in this embodiment will be described with reference to FIG.
- FIG. 7 (A) also in the extrusion molding method of this embodiment, the position MD of the movable die is fixed to the neutral position, and the screw rotation speed SP is adjusted to the predetermined pattern shown in FIG. 7 (B). And perform one cycle of extrusion molding.
- Pie in FIG. 7 (E) shows a case where the back pressure has become larger than an appropriate value because the amount of increase in the screw speed SP is too large.
- P in Fig. 7 (E) indicates the case where the increase in the screw speed SP is too small and the back pressure is smaller than the appropriate value.
- a correction process is performed to eliminate the inappropriate change amount of the screw rotation speed SP.
- the optimal amount of change S P i of the predetermined screw speed is predetermined. This should prevent back pressure fluctuations.
- the pressure distribution in the extrusion die and the like may fluctuate due to various factors. Even in such a case, according to the extrusion molding method of the present embodiment, the fluctuation of the back pressure is reliably prevented from remaining.
- the back pressure can be more precisely uniformed, and a more uniform molded body can be obtained.
- control program shown in the flowchart of FIG. 8 is also executed repeatedly on the CPU and RAM of the control unit 22 of FIG. 5 at short time intervals, as in the second embodiment.
- steps S62, S64, S66, S68, S70, S72, S74, S76 are shown in FIG. Same as steps S10 to S12, S14, S16, S18, S20, S22, S24, S26 in the second embodiment shown. Therefore, the description is omitted.
- step S78 as in the second embodiment, the movable die 8 is extruded while moving it according to a predetermined program, that is, the pattern of FIG. 7A, and at this time, the back pressure P, Is measured. Then, it is determined whether or not the fluctuation of the back pressure is within an allowable range, that is, whether or not the amount of change in the screw rotation speed is appropriate (steps S80 and S82).
- step S82 if the fluctuation of the back pressure exceeds the allowable range as shown in FIG. 7 (E), it is determined as NO in step S82, and in step S84, the amount of change in the screw rotational speed is determined. Modifications are made.
- step S86 a signal indicating the end of molding is input to the molding contact unit 26 of the extrusion molding machine 1
- the determination in step S86 is YES, and the extrusion molding is completed (step S888).
- the process returns to step S76, and the back pressure control is repeated.
- the appropriate back pressure is almost constant even if the cross-sectional shape changes in a material with low viscosity such as water. Also, when the product shape has a substantially circular cross section instead of profile extrusion, or when the cross sectional area of each product changes very little, the appropriate back pressure hardly changes.
- control for correcting the screw rotation speed change pattern is performed so as to simultaneously correct the back pressure value and the change timing.
- Control that sequentially corrects the back pressure value and the timing of change one step at a time.
- the change in the screw speed may be corrected in accordance with the method of the third embodiment after the timing of the change in the screw speed is first synchronized according to the method of the second embodiment, or vice versa. It may be controlled.
- the change timing of the screw rotation speed is synchronized according to the method of the second embodiment, and then the screw rotation speed is changed according to the method of the third embodiment.
- the amount of change may be corrected, or control may be performed in the reverse procedure.
- the extrusion molding method ⁇ for carrying out the extrusion molding method of the present invention is not limited to the structure described in each of the above embodiments, but includes any type of screw, extrusion die and the like.
- an extruder having two movable dies which are orthogonal to each other and movable in all directions has been described, but the number of the movable dies may be one or three. There may be more than one, and their arrangement is not limited at all.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94903080A EP0672515B1 (en) | 1993-08-31 | 1993-12-27 | Method of and apparatus for extrusion molding |
CA002148083A CA2148083C (en) | 1993-08-31 | 1993-12-27 | Method of and apparatus for extrusion molding |
US08/424,352 US5567368A (en) | 1993-08-31 | 1993-12-27 | Extrusion molding method and extrusion molding apparatus |
AU57166/94A AU5716694A (en) | 1993-08-31 | 1993-12-27 | Method of and apparatus for extrusion molding |
DE69332271T DE69332271T2 (de) | 1993-08-31 | 1993-12-27 | Verfahren und vorrichtung zum strangpressen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21614593 | 1993-08-31 | ||
JP5/216145 | 1993-08-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995006557A1 true WO1995006557A1 (fr) | 1995-03-09 |
Family
ID=16683987
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1993/001906 WO1995006557A1 (fr) | 1993-08-31 | 1993-12-27 | Procede et appareil de moulage par extrusion |
Country Status (8)
Country | Link |
---|---|
US (1) | US5567368A (ja) |
EP (1) | EP0672515B1 (ja) |
JP (1) | JP2768832B2 (ja) |
AU (1) | AU5716694A (ja) |
CA (1) | CA2148083C (ja) |
DE (1) | DE69332271T2 (ja) |
ES (1) | ES2181708T3 (ja) |
WO (1) | WO1995006557A1 (ja) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3677831B2 (ja) * | 1995-09-29 | 2005-08-03 | アイシン精機株式会社 | 異形押出成形品の製造装置及びその製造方法 |
US5764521A (en) * | 1995-11-13 | 1998-06-09 | Stratasys Inc. | Method and apparatus for solid prototyping |
US5792405A (en) * | 1996-08-02 | 1998-08-11 | Katayama Kogyo Kabushiki Kaisha | Machine and method for producing an automobile windshield molding |
US6113841A (en) * | 1998-11-17 | 2000-09-05 | Pechiney Plastic Packaging, Inc. | Multiple in-line parison control |
DE10014507A1 (de) * | 2000-03-23 | 2001-09-27 | Krupp Elastomertechnik Gmbh | Verfahren und Vorrichtung zur Regelung von Extrusionsanlagen |
EP1908568A1 (en) * | 2006-10-02 | 2008-04-09 | Quadrant Epp Ag | Production of UHMWPE panels |
DE602007007087D1 (de) * | 2006-07-21 | 2010-07-22 | Quadrant Epp Ag | Herstellung von uhmwpe-platten |
US7803450B2 (en) * | 2006-07-21 | 2010-09-28 | Quadrant Epp Ag | Production of UHMWPE sheet materials |
US7758797B2 (en) * | 2006-07-21 | 2010-07-20 | Quadrant Epp Ag | Production of UHMWPE sheet materials |
US7736579B2 (en) * | 2006-07-21 | 2010-06-15 | Quadrant Epp Ag | Production of UHMWPE sheet materials |
US7758796B2 (en) * | 2006-07-21 | 2010-07-20 | Quadrant Epp Ag | Production of UHMWPE sheet materials |
DE102012019737A1 (de) * | 2012-10-09 | 2014-04-10 | Klaus Peter Jakob | Verfahren zur Antriebsregelung einer Ziehvorrichtung Ziehvorrichtung sowie Steuereinrichtung |
HUE037158T2 (hu) * | 2014-04-25 | 2018-08-28 | Rolan Invest Oue | Összeállítás és eljárás mûanyag termék reciklált kevert mûanyaghulladékból történõ gyártására |
EP4403334A1 (en) * | 2023-01-20 | 2024-07-24 | Rolan Investment OÜ | A system and a method for controlling an extrusion line of mixed plastics |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6398412A (ja) * | 1986-10-15 | 1988-04-28 | Mazda Motor Corp | 合成樹脂シ−ト幅可変押出装置 |
JPH05104604A (ja) * | 1991-10-14 | 1993-04-27 | Toyo Tire & Rubber Co Ltd | ウエザストリツプの製造方法ならびに装置 |
JPH05104605A (ja) * | 1991-10-14 | 1993-04-27 | Toyo Tire & Rubber Co Ltd | ウエザストリツプの製造方法 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51134752A (en) * | 1975-05-16 | 1976-11-22 | Sekisui Chemical Co Ltd | Method of extrusion molding resin molded article with different thicknesses |
DE3526050C2 (de) * | 1985-07-20 | 1994-11-17 | Krupp Ag Hoesch Krupp | Verfahren zum Betreiben eines Extruders |
JPS6382707A (ja) * | 1986-09-29 | 1988-04-13 | Japan Steel Works Ltd:The | パリソン肉厚制御方法 |
JP2727446B2 (ja) * | 1990-09-06 | 1998-03-11 | 東海興業株式会社 | 車両用ウインドモールディング |
US5174623A (en) * | 1990-09-06 | 1992-12-29 | Tokai Kogyo Kabushiki Kaisha | Automobile windshield molding |
JP2854430B2 (ja) * | 1991-03-29 | 1999-02-03 | 東海興業株式会社 | 装飾モールディングおよびその製造方法 |
JPH05154890A (ja) * | 1991-12-05 | 1993-06-22 | Toyo Tire & Rubber Co Ltd | ウェザストリップの製造方法 |
US5395563A (en) * | 1992-02-05 | 1995-03-07 | Toyoda Gosei Co., Ltd. | Manufacturing method and apparatus for forming an elongate body having thickness change |
EP0568014B1 (en) * | 1992-04-28 | 1998-10-21 | Asahi Glass Company Ltd. | Method of making a window panel with a synthetic resin frame |
EP0586073B1 (en) * | 1992-07-31 | 1997-03-26 | Tokai Kogyo Kabushiki Kaisha | A hollow extrudate and the production method thereof |
US5445780A (en) * | 1992-08-26 | 1995-08-29 | Tokai Kogyo Kabushiki Kaisha | Assembly of a windshield glass and a weather strip having a partly modified cross section and method of manufacturing same |
JP2797864B2 (ja) * | 1992-10-30 | 1998-09-17 | 豊田合成株式会社 | 厚み変化を有するウインドモールの製造方法 |
US5447670A (en) * | 1993-04-28 | 1995-09-05 | Toyoda Gosei Co., Ltd. | Method of and apparatus for forming weather strip by extrusion |
-
1993
- 1993-12-27 US US08/424,352 patent/US5567368A/en not_active Expired - Lifetime
- 1993-12-27 WO PCT/JP1993/001906 patent/WO1995006557A1/ja active IP Right Grant
- 1993-12-27 JP JP7508032A patent/JP2768832B2/ja not_active Expired - Lifetime
- 1993-12-27 EP EP94903080A patent/EP0672515B1/en not_active Expired - Lifetime
- 1993-12-27 ES ES94903080T patent/ES2181708T3/es not_active Expired - Lifetime
- 1993-12-27 CA CA002148083A patent/CA2148083C/en not_active Expired - Fee Related
- 1993-12-27 AU AU57166/94A patent/AU5716694A/en not_active Abandoned
- 1993-12-27 DE DE69332271T patent/DE69332271T2/de not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6398412A (ja) * | 1986-10-15 | 1988-04-28 | Mazda Motor Corp | 合成樹脂シ−ト幅可変押出装置 |
JPH05104604A (ja) * | 1991-10-14 | 1993-04-27 | Toyo Tire & Rubber Co Ltd | ウエザストリツプの製造方法ならびに装置 |
JPH05104605A (ja) * | 1991-10-14 | 1993-04-27 | Toyo Tire & Rubber Co Ltd | ウエザストリツプの製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0672515A4 * |
Also Published As
Publication number | Publication date |
---|---|
AU5716694A (en) | 1995-03-22 |
CA2148083A1 (en) | 1995-03-09 |
DE69332271T2 (de) | 2003-05-15 |
EP0672515A4 (en) | 1996-12-27 |
EP0672515A1 (en) | 1995-09-20 |
US5567368A (en) | 1996-10-22 |
CA2148083C (en) | 2005-04-12 |
JP2768832B2 (ja) | 1998-06-25 |
DE69332271D1 (de) | 2002-10-10 |
ES2181708T3 (es) | 2003-03-01 |
EP0672515B1 (en) | 2002-09-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO1995006557A1 (fr) | Procede et appareil de moulage par extrusion | |
EP0197647B1 (en) | Control apparatus for extruders | |
US7595012B2 (en) | Injection molding machine and method of adjusting control condition for reverse rotation of screw in injection molding machine | |
JPS60178019A (ja) | プラスチツク管を押出成形する方法および装置 | |
JPH04219221A (ja) | バリヤスクリュ | |
RU2420402C2 (ru) | Способ и устройство для изготовления изделия трубчатой формы из термопластичного материала | |
WO1991013743A1 (fr) | Procede de commande de l'injection pour machines de moulage par injection | |
JP5989387B2 (ja) | 円筒状ゴム部材の成形方法 | |
US7648658B2 (en) | Alternate polymer extrusion method with reduced drool | |
KR102226560B1 (ko) | 고무 압출 장치 및 고무 압출물의 제조 방법 | |
JPH0446797A (ja) | 押出材料の裁断方法 | |
JP3273190B2 (ja) | ウェザストリップの製造方法ならびに装置 | |
JP3317007B2 (ja) | 押出成形装置及び押出成形方法 | |
JP2601645B2 (ja) | 連続混練機の混練制御装置 | |
JP3297616B2 (ja) | 発泡成形機の移動ダイプレート停止位置制御方法とその装置 | |
JPS6247696B2 (ja) | ||
JP3252185B2 (ja) | ウェザストリップの製造方法ならびに装置 | |
JP4140801B2 (ja) | ゴムの押出し成形装置 | |
JP2002321532A (ja) | ガラスランチャンネルの製造方法および装置 | |
CN114851520A (zh) | 一种可消除型坯长度偏差的吹瓶机及其控制方法 | |
JPH0716996B2 (ja) | 外径寸法が均一なオレフィン系樹脂発泡体の製造方法 | |
EP1549477B2 (en) | Method and apparatus for feeding an expanding agent | |
JPH06320605A (ja) | 筒状成形品の押出成形方法 | |
JPS63104802A (ja) | パリソン長さ自動調節方法 | |
JPH0760822A (ja) | 押出成形体の製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AU CA DE GB JP KR US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 08424352 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2148083 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1994903080 Country of ref document: EP |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWP | Wipo information: published in national office |
Ref document number: 1994903080 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
WWG | Wipo information: grant in national office |
Ref document number: 1994903080 Country of ref document: EP |