CN202079769U - Device for automatically controlling extruder to uniformly discharge - Google Patents

Device for automatically controlling extruder to uniformly discharge Download PDF

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Publication number
CN202079769U
CN202079769U CN2011201860562U CN201120186056U CN202079769U CN 202079769 U CN202079769 U CN 202079769U CN 2011201860562 U CN2011201860562 U CN 2011201860562U CN 201120186056 U CN201120186056 U CN 201120186056U CN 202079769 U CN202079769 U CN 202079769U
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China
Prior art keywords
hopper
extruder
shell
feed
controller
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Expired - Lifetime
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CN2011201860562U
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Chinese (zh)
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王根乐
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Individual
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    • 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
    • B29C2948/9218—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
    • B29C2948/92504—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
    • B29C2948/92819—Location or phase of control
    • B29C2948/92828—Raw material handling or dosing, e.g. active hopper or feeding device

Abstract

A device for automatically controlling an extruder to uniformly discharge comprises a controller and a weighing device, wherein the weighing device comprises a raw material hopper, a rack, a weighing hopper and a feed hopper, the raw material hopper and the feed hopper are respectively arranged on the upper end and the lower end of the rack, and a gate is arranged at an outlet of the lower end of the raw material hopper; the weighing hopper is arranged between the raw material hopper and the feed hopper, one side of the weighing hopper is connected with one end of a lever, the other end of the lever penetrates through a bracket and is provided with a counter weight, and the fulcrum of the lever is articulated on the rack; a supplement sensor is arranged beside the lever; and a discharge sensor is arranged at an outlet of the lower end of the weighing hopper. An evening device is arranged at a feeding port of the extruder, and the lower end of the feed hopper is communicated with the lower end of a shell of the evening device by an oblique tube. The device has the advantages of simplifying the structure, lowering the manufacturing cost, being simple in control principle, and easy to operate, leading the precision to be capable of meeting production needs, being easy to maintain and debug, as well as greatly improving the length, color and thickness uniformity of a product.

Description

Automatically control the device of the even discharging of extruder
Technical field
The present invention relates to the device of the even discharging of a kind of automatic control extruder, be used on inflation film manufacturing machine, drawbench, plastics wrapping machine and spray silk (bar) machine the uniformity of length, thickness and the color of discharging is controlled.
Background technology
Prior art adopts electronic scale to measure charging rate, then according to the extruding screw of charging rate control extruder or the rotating speed of carry-over pinch rolls, the rotating speed of charging rate and described extruding screw is inversely proportional to, or is directly proportional, keep film thickness even with the rotating speed of carry-over pinch rolls.Its shortcoming is a complex structure, and the cost height is difficult for maintenance and debugging; And the flow of employing solid flow sensor measurement particulate material can only be suitable for specific raw material, in case change raw material or adopt mixed material, must readjust the output of processor, owing to relate to the very strong technology of specialty row, the user is difficult to finish, can only adjust by the manufacturer, very trouble; In addition, in production practices, often the raw material mixed material of several different-grain diameters and material need be used (as adding color masterbatch and other additives), because (often the particle diameter of additive is less for the particle diameter of various raw materials and the difference of proportion, but proportion is bigger), cause mixed raw material from former hopper to the process that enters extruder the uneven phenomenon of various materials, inhomogeneous (uniformity of the uniformity of length direction, the uniformity of thickness and color is bad) of causing extruded product.
Summary of the invention
Purpose of the present invention just provides the device of the even discharging of a kind of automatic control extruder, and to solve the complex structure that prior art exists, the cost height is difficult for maintenance and debugging; And use compound to cause the uniformity of the length direction of extruded product, the uniformity of thickness and the bad problem of uniformity of color.
Technical scheme of the present invention is: the device of the even discharging of a kind of automatic control extruder, comprise controller, frame and meausring apparatus, meausring apparatus is installed on the frame, the input of this controller is connected with meausring apparatus, the output of this controller is connected with the motor of the extruding screw of extruder or the drive motors of carry-over pinch rolls, it is characterized in that: described meausring apparatus comprises former hopper, scale hooper and feed hopper, former hopper and feed hopper are installed in the top and bottom of this frame respectively, and the lower end outlet of this feed hopper is connected with the charging aperture of extruder; In the outlet of the lower end of this former hopper former hopper gate is housed, this former hopper gate is connected with first drive unit; Described scale hooper is installed between former hopper and the feed hopper, and this scale hooper and a lever and a counterweight constitute the balance-type type weighing mechanism; Between the lower end of this feed hopper and the charging aperture of extruder even distributor is housed.
One side of this scale hooper is connected with an end of lever, and the other end of this lever passes frame and counterweight is installed, and the fulcrum of this lever is hinged on this frame.
Be provided with up and down position-limit mechanism on this lever and be used for being in when the next and send the feed supplement sensor that stops feed supplement information to described controller at scale hooper; The blowing sensor that is used for sending to controller blowing information is housed in the lower end of described feed hopper; In the outlet of the lower end of described scale hooper blowing gate and connected second drive unit are housed, controlled end, feed supplement sensor and the blowing sensor of this first drive unit and second drive unit are connected with described controller respectively.
Described even distributor comprises shell, spiral and refining motor, and shell is cylindric, at an end of this shell the refining motor is installed, coaxial installation spiral in this shell, and an end of helical axis is connected with the output shaft of this refining motor is coaxial; The other end of this shell is connected with described feed hopper by feed conduit.
Be provided with the flange-interface corresponding with the charging aperture of extruder in the shell lower end of described even distributor, the axle center of this shell is coaxial with the charging aperture of extruder; Described feed conduit is obliquely installed, and the lower end of this feed conduit is connected with the lower side of this shell, and the upper end of this feed conduit is connected with the lower end of described feed hopper.
The upper end of described feed conduit is connected with the lower end of described feed hopper, is provided with the flange-interface corresponding with the charging aperture of extruder in the lower end of this feed conduit, and this feed conduit is coaxial with the charging aperture of extruder; The shell of described even distributor is obliquely installed, and the lower end of this shell is connected with the side of this feed conduit bottom.
Described first drive unit and second drive unit all adopt fluid cylinder, cylinder or electric device.
The speed probe that is used to detect the carry-over pinch rolls rotating speed is housed on described carry-over pinch rolls, and is connected with described controller.
Described controller adopts microcomputer or Programmable Logic Controller.
Described counterweight is by being threaded on the lever.
Advantage of the present invention is: control principle is simple, and operation simplifies the structure easily, has reduced manufacturing cost, and precision can satisfy the production needs, easily maintenance and debugging; Be applicable to various single raw materials or compound; When using compound, stir through on the screw of even distributor, make raw material enter before the extruder in even distributor mixing from bottom to up, improved the uniformity of various raw materials greatly, color, the length of product, the uniformity of thickness are greatly improved.
Description of drawings
Fig. 1 is the general structure schematic diagram that the present invention is applied in an embodiment on the extruder;
Fig. 2 is the general structure schematic diagram that the present invention is applied in another embodiment on the extruder.
The specific embodiment
Referring to Fig. 1 and Fig. 2, the device of the even discharging of a kind of automatic control extruder of the present invention, comprise controller 18, frame 2 and meausring apparatus, meausring apparatus is installed on the frame 2, the input of this controller 18 is connected with meausring apparatus, and the output of this controller 18 is connected with the motor 14 of the extruding screw of extruder 15 or the drive motors of carry-over pinch rolls 16.Described meausring apparatus comprises former hopper 1, scale hooper 7 and feed hopper 8, and former hopper 1 and feed hopper 8 are installed in the top and bottom of this frame 2 respectively, and the lower end outlet of this feed hopper 8 is connected with the charging aperture of extruder 15 by feed conduit 5.In the outlet of the lower end of this former hopper 1 former hopper gate 3 is housed, this former hopper gate 3 is connected with first drive unit 4.Described scale hooper 7 is installed between former hopper 1 and the feed hopper 8, and this scale hooper 7 and a lever 11 and a counterweight 12 constitute the balance-type type weighing mechanism.Between the lower end of this feed hopper 8 and the charging aperture of extruder even distributor is housed.
One side of this scale hooper 7 is connected with an end of lever 11, and the other end of this lever 11 passes frame 2 and counterweight 12 is installed, and the fulcrum of this lever 11 is hinged on this frame 2.
Be provided with up and down position-limit mechanism 10 and feed supplement sensor 13 on this lever 11, this feed supplement sensor 13 is used for being in when the next at scale hooper 7 and sends the information that stops feed supplement to described controller, closes former hopper gate 3 by controller 18.In the lower end of described feed hopper 8 blowing sensor 19 is housed, is used for sending blowing information to controller 18.In the outlet of the lower end of described scale hooper 7 blowing gate 22 and connected second drive unit 5 are housed, controlled end, feed supplement sensor 13 and the blowing sensor 19 of this first drive unit 4 and second drive unit 5 are connected with described controller 18 respectively.
Described first drive unit 4 and second drive unit 5 all adopt fluid cylinder, cylinder or electric device.
The speed probe 20 that is used to detect carry-over pinch rolls 16 rotating speeds is housed on described carry-over pinch rolls 16, and is connected with described controller 18.
Described controller 18 adopts microcomputer or Programmable Logic Controller.
Described counterweight 12 is by being threaded on the lever 11.
Described even distributor comprises shell 25, spiral 26 and refining motor 24, shell 25 is cylindric, end at this shell 25 is installed refining motor 24, coaxial installation spiral 26 in this shell 25, and the end that spiral is 26 is connected with the output shaft of this refining motor 24 is coaxial; The other end of this shell 25 is connected with described feed hopper 8 by feed conduit 5.
Among the embodiment shown in Figure 1, be provided with the flange-interface corresponding 21, the axle center of this shell 25 and the charging aperture of extruder 15 coaxial (vertically) with the charging aperture of extruder 15 in shell 25 lower ends of even distributor.Described feed conduit 5 is obliquely installed, and the lower end of this feed conduit 5 is connected with the lower side of this shell 25, and the upper end of this feed conduit 5 is connected with the lower end of described feed hopper 8.
Among another embodiment shown in Figure 2, the upper end of described feed conduit 5 is connected with the lower end of described feed hopper 8, be provided with the flange-interface corresponding 21 in the lower end of this feed conduit 5, this feed conduit 5 and the charging aperture of extruder coaxial (vertically) with the charging aperture of extruder.The shell 25 of described even distributor is obliquely installed, and the lower end of this shell 25 is connected with the side of these feed conduit 5 bottoms.
The course of work of the present invention and control principle are described as follows (is example to produce plastic sheeting):
At first set every meter weight A of input product on controller 18, as 1 gram/rice, and fill raw material in former hopper 1, the weight of counterweight 12 is configured (for example the weight W of counterweight 12 be equivalent to the former hopper 1 interior 1000g of dress raw material) according to designing requirement.After system started working, owing to do not have raw material in the original state scale hooper 7, so that counterweight 12 1 ends of lever 11 are under the effect of gravity is the next, scale hooper 7 was in upper.
The course of work is:
1) blowing: along with the operation of extruder, the level of filler material in the feed hopper 8 constantly descends, and when blowing sensor 19 detection material levels were lower than setting value (blowing sensor 19 positions), blowing sensor 19 sent blowing information to controller 18; Controller 18 is opened blowing gate 22 material in the scale hooper 7 all is discharged in the feed hopper 8, closes blowing gate 22 subsequently.
2) feed supplement: then, controller 18 is opened former hopper gate 3 and replenish material in scale hooper 7, adopt balance weighing mode to limit the weight W of each scale hooper raw material, when feed supplement reaches setting weight W, scale hooper 7 is moved down into the next, trigger feed supplement sensor 13 simultaneously, feed supplement sensor 13 sends the feed supplement information that stops to controller 18, and controller 18 cuts out former hopper gate 3.
3) repeat blowing: repeat above-mentioned steps 1 to step 2 always.
4) unit of account time feed supplement amount: controller 18 calculates the period T of adjacent twice blowing step at any time, promptly is the used duration of raw material of every charging one scale hooper of extruder, and calculates unit interval feed supplement amount B, B=W/T.
If period T is steady state value (as 50 seconds), then controller 18 is controlled carry-over pinch rolls 16 according to certain rotation speed operation according to the product parameters of setting (every meter weight A).According to the above-mentioned product parameters that provides, extruder per second load (that is unit interval feed supplement amount) is B=W/T=1000/50=20g/s.
5) calculate the rotating speed of extruder carry-over pinch rolls: with extruder per second load B(20g/s) divided by every meter weight A(1g/m of product), the rotating speed that promptly obtains carry-over pinch rolls 16 should be 20m/s.
6) rotating speed of adjustment carry-over pinch rolls: controller 18 is adjusted into 20m/s according to the rotating speed of the carry-over pinch rolls 16 that revolution counter 20 detects to it.
When the rotating speed of extruder 15 because a variety of causes (as the variation of voltage pulsation or internal structure etc.) when reducing, make charging rate slack-off, above-mentioned period T prolongs (as 55s), the degree that this moment, controller 18 prolonged according to this period T calculates the rotating speed (1000/55/1=18.18m/s of carry-over pinch rolls 16, reduce rotating speed), or improve the rotating speed of extruder motor 14, to satisfy every meter weight A(1g/m) requirement, keep the thickness of membrane even.
If the rotating speed of extruder accelerates, then charging rate improves, cause period T to shorten (as 45s), the degree that this moment, controller 18 shortened according to this period T calculates the rotating speed (1000/45/1=22.22m/s of carry-over pinch rolls 16, improved the rotating speed of carry-over pinch rolls 16), or reduce the rotating speed of extruder motor 14, to satisfy every meter weight A(1g/m) requirement, automatically adjust film thickness thereby reach, make it keep uniform purpose.
In entire work process, even distributor is turning round always, the direction of rotation of spiral 26 makes progress, the material that enters into bottoms in the shell 25 through inclined tube 5 does not directly enter into the charging aperture of extruder 15, but move upward on the following rotation of the drive limit of spiral 26, in the motion process that makes progress, some materials skid off from the outer of spiral 26 and the gap between the shell 25 and fall into extruder, like this, in even distributor, formed the dynamic equilibrium of material, realized the abundant mixing of material from the downward outflow that moves up and down.The operation principle of this even distributor is different from common agitating device (not mix up and down function), utilizes from bottom to up longitudinally, downward mixing process again, has obtained than the common more significantly mix uniformly effect that mixes.

Claims (10)

1. automatic device of the even discharging of control extruder, comprise controller, frame and meausring apparatus, meausring apparatus is installed on the frame, the input of this controller is connected with meausring apparatus, the output of this controller is connected with the motor of the extruding screw of extruder or the drive motors of carry-over pinch rolls, it is characterized in that: described meausring apparatus comprises former hopper, scale hooper and feed hopper, former hopper and feed hopper are installed in the top and bottom of this frame respectively, and the lower end outlet of this feed hopper is connected with the charging aperture of extruder; In the outlet of the lower end of this former hopper former hopper gate is housed, this former hopper gate is connected with first drive unit; Described scale hooper is installed between former hopper and the feed hopper, and this scale hooper and a lever and a counterweight constitute the balance-type type weighing mechanism; Between the lower end of this feed hopper and the charging aperture of extruder even distributor is housed.
2. the device of the even discharging of automatic control extruder according to claim 1 is characterized in that: a side of this scale hooper is connected with an end of lever, and the other end of this lever passes frame and counterweight is installed, and the fulcrum of this lever is hinged on this frame.
3. the device of the even discharging of automatic control extruder according to claim 2 is characterized in that: be provided with up and down position-limit mechanism on this lever and be used for being in when the next at scale hooper and send the feed supplement sensor that stops feed supplement information to described controller; The blowing sensor that is used for sending to controller blowing information is housed in the lower end of described feed hopper; In the outlet of the lower end of described scale hooper blowing gate and connected second drive unit are housed, controlled end, feed supplement sensor and the blowing sensor of this first drive unit and second drive unit are connected with described controller respectively.
4. the device of the even discharging of automatic control extruder according to claim 1, it is characterized in that: described even distributor comprises shell, spiral and refining motor, shell is cylindric, end at this shell is installed the refining motor, coaxial installation spiral in this shell, an end of helical axis is connected with the output shaft of this refining motor is coaxial; The other end of this shell is connected with described feed hopper by feed conduit.
5. the device of the even discharging of automatic control extruder according to claim 4 is characterized in that: be provided with the flange-interface corresponding with the charging aperture of extruder in the shell lower end of described even distributor, the axle center of this shell is coaxial with the charging aperture of extruder; Described feed conduit is obliquely installed, and the lower end of this feed conduit is connected with the lower side of this shell, and the upper end of this feed conduit is connected with the lower end of described feed hopper.
6. the device of the even discharging of automatic control extruder according to claim 4, it is characterized in that: the upper end of described feed conduit is connected with the lower end of described feed hopper, be provided with the flange-interface corresponding with the charging aperture of extruder in the lower end of this feed conduit, this feed conduit is coaxial with the charging aperture of extruder; The shell of described even distributor is obliquely installed, and the lower end of this shell is connected with the side of this feed conduit bottom.
7. the device of the even discharging of automatic control extruder according to claim 3 is characterized in that: described first drive unit and second drive unit all adopt fluid cylinder, cylinder or electric device.
8. the device of the even discharging of automatic control extruder according to claim 1 is characterized in that: the speed probe that is used to detect the carry-over pinch rolls rotating speed is housed on described carry-over pinch rolls, and is connected with described controller.
9. the device of the even discharging of automatic control extruder according to claim 1 is characterized in that: described controller adopts microcomputer or Programmable Logic Controller.
10. the device of the even discharging of automatic control extruder according to claim 1 is characterized in that: described counterweight is by being threaded on the lever.
CN2011201860562U 2011-06-03 2011-06-03 Device for automatically controlling extruder to uniformly discharge Expired - Lifetime CN202079769U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201860562U CN202079769U (en) 2011-06-03 2011-06-03 Device for automatically controlling extruder to uniformly discharge

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Application Number Priority Date Filing Date Title
CN2011201860562U CN202079769U (en) 2011-06-03 2011-06-03 Device for automatically controlling extruder to uniformly discharge

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CN202079769U true CN202079769U (en) 2011-12-21

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102285094A (en) * 2011-06-03 2011-12-21 王根乐 Device for automatically controlling extruder to discharge material uniformly
WO2020173704A1 (en) * 2019-02-28 2020-09-03 Aim3D Gmbh Charging system and method for feeding processing material to an extruder screw

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102285094A (en) * 2011-06-03 2011-12-21 王根乐 Device for automatically controlling extruder to discharge material uniformly
CN102285094B (en) * 2011-06-03 2013-08-07 王根乐 Device for automatically controlling extruder to discharge material uniformly
WO2020173704A1 (en) * 2019-02-28 2020-09-03 Aim3D Gmbh Charging system and method for feeding processing material to an extruder screw

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