JP6629516B2 - Extrusion molding equipment - Google Patents

Description

  The present invention relates to an extrusion molding device for extruding an inorganic molding material to obtain a molded product.

  An extruder that supplies an inorganic molding material, an extruder that has a flow passage through which the inorganic molding material supplied by the extruder flows, and an extrusion port that is provided at a downstream end of the flow passage and through which the inorganic molding material is extruded In the above, it is desirable to detect movement information indicating the movement state of the inorganic molding material flowing in the flow passage, and to control each part of the extrusion molding apparatus based on the detection result.

  Patent Document 1 discloses an example of an extrusion molding apparatus in which a pressure gauge is provided in a raw material supply pipe through which a raw material flows, and the pressure gauge detects a flow state of the raw material in the raw material supply pipe.

  This extrusion apparatus adjusts the supply amount of the lubricant into the raw material supply pipe based on the flow state of the raw material detected by the pressure gauge, and controls the flow resistance of the raw material flowing in the raw material supply pipe. Is configured.

JP-A-8-309832

  However, the extrusion molding apparatus can detect the flow state of the raw material flowing in the raw material supply pipe, but cannot accurately detect the movement information of the raw material. It is also conceivable to determine the moving speed using an electromagnetic flow meter. However, this electromagnetic flowmeter has a relatively high water content (for example, 75% or more) to be detected, and ceramic materials having a relatively low water content (for example, about 50%) cannot be detected.

  Therefore, the extrusion molding apparatus for ceramic materials has a problem that it is not possible to accurately control each part of the apparatus based on the movement information of the ceramic materials before extrusion.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to accurately control an extrusion molding apparatus for ceramic materials and to obtain a molded product having more stable quality.

The extrusion molding apparatus of the present invention includes an extrusion molding apparatus main body, and control means for controlling the extrusion molding apparatus main body. The extrusion molding apparatus main body is supplied by an extruder that supplies an inorganic molding material, and is supplied by the extruder. An extrusion molding apparatus having a flow passage through which the formed inorganic molding material flows, and an extrusion opening provided at a downstream end of the flow passage and through which the inorganic molding material is extruded, wherein the inorganic molding material has a skin. Material and a core material having a lower specific gravity than the skin material, wherein the extrusion molding device main body has a plurality of extruders for supplying the skin material and the core material, respectively, and the flow passage is provided with each of the extruders. A plurality of branch passages through which the inorganic molding material supplied from each of the plurality of branch passages is provided, provided at the downstream end of the plurality of branch passages, communicates with the extrusion port, and the plurality of branch passages The supplied the skin material and the core material, and a combined channel to send to the extrusion port overlapping the core material between the skin material, speed or movement of the mineral molding material of the respective branch passages Presence or absence, or further comprising a movement information detecting means for detecting movement information indicating a movement state comprising a speed ratio of the skin material and the core material in the plurality of branch flow paths , each of the branch flow paths A light transmitting part, and the movement information detecting means irradiates the inorganic molding material flowing through the branch flow path from the outside through the transmitting part with the detection light, reflected on the inorganic molding material flowing through the road receives the reflected light transmitted through the transmissive portion, it between the skin material and the core material of said plurality of branch flow paths based on these detection light and the reflected light Detecting the movement information of Le, the control means, based on said detected by the movement information detecting means, each of the movement information of the plurality of said skin material of the branch flow path and the core material, said extrusion port The extruders are controlled such that the ratio of the thickness of the skin material and the thickness of the core material extruded from the extruder falls within a preset range.

In the extrusion molding apparatus, it is preferable that the movement information detecting means is a laser Doppler velocimeter .

  Further, in this extrusion molding apparatus, it is preferable that the transmission portion is made of tempered glass that closes an opening provided on a side wall of the flow passage.

  ADVANTAGE OF THE INVENTION According to the extrusion molding apparatus of this invention, it can be controlled accurately and a molded product of more stable quality can be obtained.

1 is a schematic plan view showing an entire extrusion molding apparatus according to an embodiment of the present invention. It is a perspective view of a connecting pipe of an extrusion molding device concerning one embodiment of the present invention. It is sectional drawing of the die apparatus of the extrusion molding apparatus which concerns on one Embodiment of this invention. It is sectional drawing of the molded article manufactured by the extrusion molding apparatus which concerns on one Embodiment of this invention. It is a block diagram of an extrusion molding device concerning one embodiment of the present invention. FIG. 9 is a control block diagram of an extrusion molding device according to a first modification. FIG. 9 is a control block diagram of an extrusion molding device according to a second modification. It is an outline top view showing the whole extrusion molding device concerning other embodiments.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  The extrusion molding apparatus according to the present embodiment is an apparatus for extruding an inorganic molding material such as a cement molding material to produce a molded article 9. This extrusion molding apparatus includes an extrusion molding apparatus main body 1, movement information detecting means 7, and control means 8 for controlling the extrusion molding apparatus main body 1 based on the detection result of the movement information detecting means 7 (hereinafter, referred to as a control apparatus 8a). Described). In the present embodiment, the movement information detecting means 7 is constituted by a speed detecting device 7a for detecting a speed as movement information of the inorganic molding material. In the present embodiment, a material in a state before extrusion molding is referred to as an inorganic molding material, an extruded material is referred to as a molded body 93, and a material cut by the cutter 65 after extrusion molding is a molded product. 9

  The extrusion molding apparatus of the present embodiment produces a molded article 9 as shown in FIG. The molded article 9 has a three-layer structure including a core layer 91 and skin layers 92 laminated on both sides of the core layer 91 in the thickness direction. The skin layers 92 also exist on both sides of the core layer 91 in the width direction, and are configured to surround the core layer 91.

  In the present embodiment, a core material for forming the core layer 91 and a skin material for forming the skin layer 92 are used as the inorganic molding materials. The core material and the skin material are different from each other in the content components and the content of each component.

  The inorganic molding material is composed of, for example, a cement molding material. Specific examples of the cement-based molding material include a mixture in which cement, silica, reinforcing fibers, water, and the like are blended. Known cements such as Portland cement, blast furnace cement, alumina cement and fly ash cement can be used as the cement. Examples of the reinforcing fibers include natural fibers such as pulp fibers, synthetic fibers such as vinylon and polypropylene, and inorganic fibers such as glass fibers, rock wool, and carbon fibers. The cement-based molding material may include only one of the above-listed reinforcing fibers, or may include two or more of the reinforcing fibers. In addition, the cement-based molding material may include an aggregate, a lightweight aggregate, a water reducing agent, a thickener, and other additives. The mixing ratio and mixing method of each component constituting the cement molding material are not particularly limited. The inorganic molding material used in the extrusion molding apparatus of the present embodiment is not limited to a cement-based molding material, but may be any other water-curable inorganic material, a ceramic material, or a fired material such as clay. .

  The extrusion molding device main body 1 extrudes the inorganic molding material supplied by the extruder 4 to obtain a molded product 9. As shown in FIG. 1, the extrusion molding apparatus main body 1 includes a molding machine 10 for molding a molded body 93 by extrusion molding, and a conveying unit 6 for pulling out and conveying the molded body 93 (hereinafter, described as a conveyor 6a). , A patterning roll 5, and a cutting machine 65 for cutting the molded body 93.

  The molding machine 10 includes two extruders 4, a mold apparatus 2 for extruding the inorganic molding material supplied from each extruder 4, and a connection pipe 3 for connecting each extruder 4 and the mold apparatus 2. And

  Each extruder 4 supplies an inorganic molding material toward the mold apparatus 2. Each extruder 4 has an input port 44, through which the inorganic molding material is input. Each extruder 4 includes, for example, a pug section in which a biaxial screw is installed, an auger section in which a uniaxial screw is installed, and a vacuum section provided between the pug section and the auger section. The inorganic molding material charged from the charging port 44 is kneaded and sent to the pug portion, the vacuum portion, and the auger portion in this order, and is sent to the mold apparatus 2 by the auger portion.

  One of the two extruders 4 is a first extruder 41 that sends the skin material to the mold device 2, and the other is a second extruder that sends the core material to the mold device 2. 42.

  The connecting pipe 3 is connected to the downstream end of each extruder 4. The connection pipe 3 connects and connects the outlet of each extruder 4 and the inlet of the mold apparatus 2. As shown in FIG. 2, the connection pipe 3 includes a cylindrical connection pipe main body 30 and a transmission section 31 provided on the connection pipe main body 30. The transmission unit 31 is configured to transmit light. Thereby, it is possible to irradiate the inorganic molding material flowing inside the connecting pipe main body 30 with the detection light emitted from the speed detecting device 7a described later. The transmission part 31 is constituted by a transmission window 31 a in which an opening part 32 provided on a side wall of the connection pipe main body 30 is closed with a tempered glass 33. That is, the transmission part 31 of the present embodiment is made of tempered glass 33.

  The opening 32 has a substantially rectangular shape and is formed, for example, to be 70 mm long × 30 mm wide.

  The tempered glass 33 is a transparent glass, and can transmit light. The tempered glass 33 is a glass having a strength about 3 to 5 times that of a general float plate glass, and can withstand at least the pressure (about 2 MPa) of the inorganic molding material flowing inside the connection pipe main body 30. It is formed in a size of about. The tempered glass 33 of the present embodiment is formed, for example, to be 70 mm long × 30 mm wide × 10 mm thick. The inner surface of the tempered glass 33 is formed flush with the inner surface of the connection pipe main body 30 so that the flowing inorganic molding material does not stay.

  The mold apparatus 2 shapes the inorganic molding material sent from the extruder 4 into a predetermined shape to produce a molded body 93. As shown in FIG. 1, the mold apparatus 2 includes a plurality of inflow portions 20 to which the connection pipes 3 are connected, and one extrusion port 29. Each inflow section 20 is provided with an inflow port. Here, the inlet into which the skin material flows is called skin material inlet 20a, and the inlet into which the core material flows is called core material inlet 20b. The skin material inlet 20 a communicates with the outlet of the first extruder 41 via the connection pipe 3. The core material inlet 20 b communicates with the outlet of the second extruder 42 via the connection pipe 3.

  The mold device 2 includes an upper mold 21, a lower mold 22, and a core 23, as shown in FIG. The upper mold 21 and the lower mold 22 are vertically opposed to each other. A cavity for accommodating the core 23 is provided between the upper mold 21 and the lower mold 22, and the core 23 is arranged in the cavity. Inside the core 23, a flow path 23a for a core material is formed.

  Between the upper die 21 and the core 23, a first skin material flow path 23b for flowing the skin material is formed. In addition, a second skin material flow path 23c through which the skin material flows is formed between the lower mold 22 and the core 23. Between the upper mold 21 and the lower mold 22, a joining channel 28 is formed at a position where the downstream end of the core material channel 23 a is located.

  The merging channel 28 includes a downstream end of the first skin material flow channel 23b, a downstream end of the second skin material flow channel 23c, and a downstream end of the core material flow channel 23a. The downstream end of the flow path communicates with the extrusion port 29. At the upstream end of the joining channel 28, the downstream end of the core material channel 23 a is connected to the downstream end of the first skin material channel 23 b and the second skin material channel. It is located between the downstream end of the road 23c.

When the first extruder 41 to supply the skin materials, the skin material, the outlet of the first extruder 41, fed in the order of the connecting tube 3 and the skin material for inlet 20a, then, the first skin material The fluid diverges into a flow channel 23b and a second skin material flow channel 23c, and then reaches a merge channel 28. When the second extruder 42 supplies the core material, the core material is sent in the order of the outlet of the second extruder 42, the connecting pipe 3, and the inlet 20b for the core material. It circulates through the path 23a and reaches the junction 28.

  Here, the inside of the connection pipe 3, which is a flow passage through which the skin material circulates, and the flow passage 24 including the first skin material flow passage 23 b and the second skin material flow passage 23 c are connected to the first branch passage 26. That. In addition, the flow path 24, which is the flow path 24 through which the core material circulates and which is formed of the inside of the connection pipe 3 and the flow path 23 a for the core material, is called a second branch path 27. The first branch path 26 and the second branch path 27 may be collectively referred to as a plurality of branch paths 25. The downstream ends of the plurality of branch channels 25 join at a junction channel 28.

  The skin material and the core material that have reached the merging channel 28 are sent toward the extrusion port 29 with the core material superposed between the skin materials, formed into a predetermined shape by the extrusion port 29, and continuously extruded. It is. Thus, a molded body 93 having a three-layer structure is formed.

  The molded body 93 extruded by the mold apparatus 2 having such a configuration is drawn out and transported by the transporting device 6a as shown in FIG. The transport device 6a is configured such that a first conveyor 61, a second conveyor 62, and a third conveyor 63 are arranged in order from the upstream side. Each of the conveyors 61, 62, 63 is configured to be driven by a motor 64, and the conveyance speed can be controlled by changing the rotation speed of the motor 64.

  A patterning roll 5 is provided between the mold apparatus 2 and the first conveyor 61. The patterning roll 5 is pressed against the molded body 93 immediately after being extruded from the extrusion port 29, thereby forming a pattern or the like on the molded body 93. The patterning roll 5 is configured to be rotationally driven by, for example, a roll driving device 51 (see FIG. 7).

  A cutting machine 65 is provided on the second conveyor 62. The cutting machine 65 cuts the molded body 93 moving on the second conveyor 62 into a predetermined size to form the molded article 9.

  The extrusion molding device main body 1 having such a configuration is controlled by the control device 8a. The control device 8a of the present embodiment is configured to control each part (for example, the extruder 4, the transport device 6a, the emboss roll 5, etc.) of the extrusion molding device main body 1 based on the detection value of the speed detection device 7a. ing.

  The speed detection device 7a is a device that irradiates the detection target object with the detection light, receives reflected light reflected from the detection target object, and detects the moving speed of the detection target object based on the detection light and the reflected light. is there. The speed detection device 7a is configured by, for example, a laser Doppler velocimeter that irradiates laser light as detection light. By using a laser Doppler velocimeter, even low-speed movement such as an inorganic molding material can be detected.

As shown in FIG. 1, the speed detection device 7a includes two detectors 71 and 72 provided for each branch flow path 25 (detectors corresponding to the first branch path 26). Is referred to as a first detector 71, and a detector corresponding to the second branch path 27 is referred to as a second detector 72). That is, the first detector 71 detects the moving speed of the skin material (surface speed of the skin material). The second detector 72 detects the moving speed of the core material (surface speed of the core material). When detecting the moving speed of each of the inorganic molding materials flowing through the plurality of branch channels 25, the speed detecting device 7a outputs the detected data (speed information) to the control device 8a, as shown in FIG.

  The control device 8a is configured by, for example, a computer having a microprocessor as a main component. The control device 8a according to the present embodiment includes a signal processing unit 81 and an extruder control unit 83, and controls two extruders 4 and the like.

  When the speed information is input from the first detector 71, the signal processing unit 81 determines whether the flow velocity value of the skin material flowing through the first branch path 26 is within a preset range, The determination information is output to the extruder control unit 83. When the speed information is input from the second detector 72, the signal processing unit 81 determines whether or not the flow velocity value of the core material flowing through the second branch 27 is within a preset range. Then, the determination information is output to the extruder control unit 83.

  The extruder control unit 83 controls the first extruder 41 based on the input of the determination information about the first branch 26 from the signal processing unit 81 based on the determination information. That is, when the determination information about the moving speed of the skin material is input from the signal processing unit 81, the extruder control unit 83 sets the flow speed of the skin material flowing through the first branch passage 26 to a flow speed within a preset range. The motor 43 of the first extruder 41 is feedback-controlled so as to obtain a value.

  Further, when the judgment information on the second branch 27 is input from the signal processing unit 81, the extruder control unit 83 controls the second extruder 42 based on the judgment information. That is, when the determination information about the moving speed of the core material is input from the signal processing unit 81, the extruder control unit 83 sets the flow speed of the core material flowing through the second branch 27 to a flow speed within a preset range. The feedback control of the motor 43 of the second extruder 42 is performed so as to obtain the value.

  Note that the extruder control unit 83 controls the extruders 41 and 42 so that the ratio of the thickness of the core layer 91 and the thickness of the skin layer 92 of the molded article 9 falls within a preset range even when the extrusion speed of each material changes. Feedback control. Therefore, the extruder control unit 83 may feedback-control the motor 43 of the second extruder 42 based on the determination information about the moving speed of the skin material input from the signal processing unit 81, or The motor 43 of the first extruder 41 may be feedback-controlled based on the determination information about the moving speed of the core material input from the processing unit 81. Further, the extruder control unit 83 determines that the speed difference between the moving speed of the core material and the moving speed of the skin material is constant based on the judgment information on the moving speed of the skin material and the judgment information on the moving speed of the core material. Or the same), the motor 43 of the first extruder 41 and the motor 43 of the second extruder 42 may be feedback-controlled.

  Here, in order to reduce the weight of the molded article 9, the specific gravity of the core material may be lower than that of the skin material. In this case, since the skin material has a higher specific gravity than the core material, extrusion control is relatively easy. Therefore, when the moving speed of the core material does not deviate from the predetermined range, the extruder control unit 83 performs feedback control of the motor 43 of the first extruder 41 based on the input from the signal processing unit 81. Is preferred.

  Thereby, the skin material and the core material can be supplied to the extrusion port 29 at an appropriate ratio. In particular, in the case of the molded body 93 having a structure in which the core layer 91 is wrapped by the skin layer 92 as in the present embodiment, it is determined whether or not the core layer 91 and the skin layer 92 are molded at an appropriate ratio. It is difficult to judge the body 93 from the outside. For this reason, whether or not the core layer 91 and the skin layer 92 are laminated at an appropriate ratio is often determined by looking at the cross section of the molded article 9 after the cutting machine. On the other hand, if the skin material and the core material can be supplied to the extrusion port 29 at an appropriate ratio, the yield can be improved and the high-quality molded article 9 can be stably manufactured.

  Further, the control device 8a may be configured to control the transport device 6a as shown in FIG. 6 (hereinafter, the example of FIG. 6 is referred to as a first modification). The control device 8a of the first modification includes a signal processing unit 81a and a motor control unit 82.

  When the speed information is input from the first detector 71 and the second detector 72, the signal processing unit 81a adds a preset coefficient to the detection value of the first detector 71 and the detection value of the second detector 72. To calculate the moving speed (extrusion speed) of the molded body 93 at the outlet of the extrusion port 29. After calculating the extrusion speed of the compact 93, the signal processing unit 81a outputs the calculation information to the motor control unit 82.

  When the calculation information of the extrusion speed of the molded body 93 is input from the signal processing unit 81a, the motor control unit 82 drives and controls the motor 64 of the conveyance device 6a based on the information, thereby controlling the conveyance speed. It is configured to Specifically, the motor control unit 82 controls the transport device 6a such that the extrusion speed of the molded body 93 and the transport speed match.

  According to the extrusion molding apparatus of the first modification, it is possible to prevent the molded body 93 from being deformed by the transport device 6a. That is, if the extrusion speed of the molded body 93 is different from the transport speed of the molded body 93 by the transport device 6a, the molded body 93 may be elongated or wrinkled. On the other hand, according to the extrusion molding apparatus of Modification 1, since the extrusion speed of the molded body 93 and the conveyance speed of the molded body 93 can be synchronized, the deformation of the molded body 93 can be suppressed, and the shape can be maintained. It can be conveyed by the conveyance device 6a.

  The control device 8a may be configured to control a driving device (a roll driving device 51) of the patterning roll 5 as shown in FIG. 7 (hereinafter, the example of FIG. ). The control device 8a of the second modification includes a signal processing unit 81b and a roll control unit 84.

  When the speed information is input from the first detector 71 and the second detector 72, the signal processing unit 81b adds a preset coefficient to the detection value of the first detector 71 and the detection value of the second detector 72. To calculate the moving speed (extrusion speed) of the molded body 93 at the outlet of the extrusion port 29. After calculating the extrusion speed, the signal processing unit 81b outputs the calculation information to the roll control unit 84.

  When the calculation information of the extrusion speed is input from the signal processing unit 81, the roll control unit 84 controls the drive of the roll driving device 51 based on the information. Thereby, the speed on the outer peripheral surface of the patterning roll 5 and the extrusion speed of the molded body 93 can be matched.

  For this reason, according to the extrusion molding device of the second modification, it is possible to suppress the formation of the pattern of the patterning roll 5 on the molded body 93 from shifting in the transport direction.

  Regarding the control by the control device 8a, the first embodiment and the first and second modifications may be appropriately combined, or may be configured by only one of them.

  As described above, the extrusion molding apparatuses of the present embodiment and Modifications 1 and 2 include the extrusion molding apparatus main body 1 and the control unit 8 that controls the extrusion molding apparatus main body 1. The extrusion molding apparatus main body 1 includes an extruder 4 for supplying an inorganic molding material, a flow passage 24 through which the inorganic molding material supplied by the extruder 4 flows, and an inorganic material provided at a downstream end of the flow passage 24. An extrusion port 29 through which a molding material is extruded. The flow passage 24 is provided with a transmission portion 31 that can transmit light. The extruder further includes a movement information detector 7. The movement information detecting means 7 irradiates the inorganic molding material flowing through the flow passage 24 with the detection light through the transmission portion 31, and reflects the inorganic molding material flowing in the flow passage 24 and transmits the transmission light through the transmission portion 31. The light is received, and movement information indicating the movement state of the inorganic molding material is detected based on the detection light and the reflected light. The control means 8 controls the extruder 4 based on the moving speed of the inorganic molding material detected by the movement information detecting means 7. The movement information refers to, for example, information indicating the movement state of the inorganic molding material, such as speed, presence or absence of movement, and speed ratio.

  For this reason, according to this extrusion molding device, since the moving speed of the inorganic molding material in the flow passage 24 can be detected, the extrusion molding device main body 1 can be accurately controlled, and a molded product 9 with more stable quality can be obtained. be able to.

  Further, the extrusion molding apparatuses of the present embodiment and Modifications 1 and 2 have the following additional configurations. In this extruder, the extruder main body 1 includes a plurality of extruders 4. The flow passage 24 includes a plurality of branch passages 25 through which the inorganic molding material supplied from each extruder 4 flows, and a joining passage 28 provided at a downstream end of each of the plurality of branch passages 25 and communicating with an extrusion port 29. And The transmission part 31 is provided in each branch channel 25. The movement information detecting means 7 detects a moving speed of each of the inorganic molding materials flowing through each branch flow path 25. The control means 8 controls at least one of the plurality of extruders 4 based on the moving speed detected by the movement information detecting means 7.

  For this reason, according to this extrusion molding apparatus, in the molded body 93 on which a plurality of inorganic molding materials are stacked, it is possible to perform extrusion molding while controlling the moving speed of each inorganic molding material, so that more stable quality molding is performed. Article 9 can be obtained.

  Further, the extrusion molding apparatuses of the present embodiment and Modifications 1 and 2 have the following additional configurations. This extrusion molding apparatus is provided with a transporting unit 6 for transporting the molded body 93 extruded from the extrusion port 29 by the extrusion molding apparatus main body 1. The control means 8 controls the transport speed of the transport means 6 based on the moving speed detected by the movement information detecting means 7.

  For this reason, according to this extrusion molding device, the deformation of the molded body 93 can be suppressed by the conveying means 6 and the molded body 93 can be conveyed by the conveying means 6 while maintaining the shape. As a result, a more stable quality molded article 9 can be obtained.

  Further, the extrusion molding apparatuses of the present embodiment and Modifications 1 and 2 have the following additional configurations. The transmission section 31 of the extrusion molding apparatus is made of tempered glass 33 that closes an opening 32 provided on the side wall of the flow passage 24.

  As described above, in the extrusion molding apparatus, since the transmission section 31 is formed of the tempered glass 33, it is possible to suppress the transmission section 31 from being damaged by the pressure inside the mold apparatus 2.

  In the above embodiment, the control device 8a controls each part of the extrusion molding device main body 1 based on the moving speed of the skin material and the core material in the branch flow path 25 detected by the speed detecting device 7a. The present invention is not limited to this, and the control may be performed based on information indicating the movement state of the skin material and the core material in the branch channel 25. For example, the control device 8a may perform the control based on the moving speed ratio between the skin material and the core material, instead of controlling based on the moving speeds of the skin material and the core material.

  In addition, although the extrusion molding apparatuses of the present embodiment and Modifications 1 and 2 include two extruders 4, in the present invention, for example, one (see FIG. 8) or three or more extruders 4 may be used.

  In addition, in the extrusion molding apparatuses of the present embodiment and Modifications 1 and 2, the transmission window 31a is provided in the connection pipe 3 connected to the molding apparatus 2, but for example, the molding apparatus 2 and the extruder 4 May be provided in at least one of the mold device 2 and the extruder 4. Further, the transmission section 31 is not limited to the transmission window 31a, and may be any as long as the detection light of the movement information detection means 7 can be transmitted.

  In the present embodiment, the molded article 9 refers to a molded article 9 that has been cut by a cutting machine 65 after extrusion molding. However, if there is no cutting machine 65, the molded article 9 may be the one immediately after extrusion molding. .

DESCRIPTION OF SYMBOLS 1 Extrusion molding apparatus main body 2 Die apparatus 24 Flow path 25 Branch flow path 26 First branch path 27 Second branch path 28 Joint flow path 29 Extrusion port 3 Connection pipe 30 Connection pipe main body 31 Transmission part 31a Transmission window 32 Opening Reference Signs List 33 tempered glass 4 extruder 41 first extruder 42 second extruder 5 patterning roll 6 transfer means 6a transfer device 65 cutting machine 7 movement information detection means 7a speed detection device 71 first detector 72 second detector Reference Signs List 8 control means 8a control device 9 molded article 93 molded article

Claims (3)

An extrusion molding device main body;
Control means for controlling the extrusion molding device main body,
The extrusion molding device body,
An extruder for supplying an inorganic molding material,
A flow passage through which the inorganic molding material supplied by the extruder flows,
An extrusion port provided at an end on the downstream side of the flow passage and through which the inorganic molding material is extruded,
The inorganic molding material is a skin material and a core material having a lower specific gravity than the skin material,
The extrusion molding device body,
Having a plurality of extruders for supplying the skin material and the core material, respectively.
The flow passage,
A plurality of branch channels through which the inorganic molding material supplied from each of the extruders respectively flows,
The skin material and the core material provided at the downstream end portions of the plurality of branch flow paths, communicating with the extrusion port, and supplied from the plurality of branch flow paths, the core material is provided between the skin materials. Having a merging flow path for stacking materials and sending the material to the extrusion port,
The information processing apparatus further includes a movement information detecting unit configured to detect speed or presence / absence of movement of the inorganic molding material in each of the branch channels , or movement information including a speed ratio between the skin material and the core material in the plurality of branch channels. And
In each of the branch flow paths, a transmission portion that can transmit light is provided,
The movement information detecting means irradiates the inorganic molding material flowing in the branch flow path from the outside via the transmission portion with detection light, and reflects the inorganic molding material flowing in the branch flow path to transmit the detection light. Receiving the reflected light passing through the portion, detecting the movement information of each of the skin material and the core material of the plurality of branch channels based on the detected light and the reflected light,
The control means, based on the movement information of the skin material and the core material of the plurality of branch channels detected by the movement information detection means, based on the movement information of the skin material and the skin material extruded from the extrusion port. An extrusion molding apparatus, wherein each of the extruders is controlled so that the ratio of the thickness of the core material is within a preset range. 2. The extrusion molding apparatus according to claim 1, wherein the movement information detecting means is a laser Doppler velocimeter. 3. The extrusion molding apparatus according to claim 1, wherein the transmission unit is made of tempered glass that closes an opening provided on a side wall of the flow passage. 4.

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