CN113232269A - Filtering device for plastic extruder and method for replacing filtering net - Google Patents
Filtering device for plastic extruder and method for replacing filtering net Download PDFInfo
- Publication number
- CN113232269A CN113232269A CN202110635883.3A CN202110635883A CN113232269A CN 113232269 A CN113232269 A CN 113232269A CN 202110635883 A CN202110635883 A CN 202110635883A CN 113232269 A CN113232269 A CN 113232269A
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- Prior art keywords
- placing
- control system
- placing plate
- filter screen
- plastic extruder
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- 239000004033 plastic Substances 0.000 title claims abstract description 79
- 229920003023 plastic Polymers 0.000 title claims abstract description 79
- 238000001914 filtration Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims description 8
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims description 39
- 238000009434 installation Methods 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000002994 raw material Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229920000459 Nitrile rubber Polymers 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 229920001973 fluoroelastomer Polymers 0.000 description 4
- 229920002379 silicone rubber Polymers 0.000 description 4
- 239000004945 silicone rubber Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000003000 extruded plastic Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Images
Classifications
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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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/69—Filters or screens for the moulding material
- B29C48/692—Filters or screens for the moulding material in the form of webs displaceable for using adjacent areas consecutively
-
- 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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/802—Heating
-
- 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
- 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
- B29C48/96—Safety devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a filtering device for a plastic extruder, which comprises a filtering net and also comprises: the mesh baffle plate comprises a placing plate, a mesh baffle plate, a fixed seat and a power device, wherein the placing plate is rectangular, two placing grooves are formed in the front end face of the placing plate, and the two placing grooves are sequentially arranged along the left and right directions; a first circular through hole for molten plastic to pass through is formed in the bottom wall of the groove for placing the groove; the mesh baffle and the filter screen are both placed in the placing groove, and material through holes are formed in the mesh baffle; the fixed seat is connected with a machine barrel of the plastic extruder, a second round through hole for molten plastic to pass through is formed in the fixed seat along the front-back direction, and a rectangular through hole for the placing plate to pass through is formed in the fixed seat along the left-right direction; the power device is connected with the placing plate and is used for driving the placing plate to move along the left and right directions; the invention can replace the filter screen without shutdown, so that the plastic extruder can continuously and normally produce, and the production efficiency of the plastic extruder can be effectively ensured.
Description
Technical Field
The invention relates to the field of plastic extruders, in particular to a filtering device for a plastic extruder and a method for replacing a filtering net.
Background
The plastic raw materials used by the plastic extruder need to be subjected to production processes such as mixing and banburying, and impurities such as stones, iron slag, iron wires and the like can be mixed in the production process of the plastic raw materials, so that the plastic raw materials entering the plastic extruder are impure, and the quality of extruded plastic products is influenced. When the raw material used for the plastic raw material is recycled plastic, the produced plastic raw material contains more impurities, and therefore, a filtering device is required to be arranged in front of a forming die of a plastic extruder for filtering the impurities contained in the molten plastic.
The filter element of the filter device is a filter screen, and after a period of use, the meshes of the filter screen are blocked, so that the filter screen needs to be replaced. When the filter screen of the existing filter device is replaced, the filter screen needs to be stopped firstly, so that the replacement of the filter screen can be carried out, and the continuous production and the production efficiency of the plastic extruder are influenced.
Disclosure of Invention
The invention aims to provide a filtering device for a plastic extruder, which can replace a filtering net without shutdown, so that the plastic extruder can continuously and normally produce, and the production efficiency of the plastic extruder can be effectively ensured. Another object of the present invention is to provide a method for replacing a filter screen of a filter device for a plastic extruder, which can automatically replace the filter screen when the filter screen is clogged.
The invention is realized by the following steps: the utility model provides a filter equipment for plastic extruder, includes the filter screen, still includes:
the placing plate is rectangular, two placing grooves are formed in the front end face of the placing plate, and the two placing grooves are sequentially arranged along the left direction and the right direction; a first circular through hole for molten plastic to pass through is formed in the bottom wall of the groove for placing the groove;
the mesh baffle and the filter screen are both placed in the placing groove, the mesh baffle is positioned on the rear side of the filter screen, and material through holes for molten plastic to pass through are formed in the mesh baffle;
the fixed seat is connected with a machine barrel of the plastic extruder, a second circular through hole for molten plastic to pass through is formed in the front-back direction of the fixed seat, and a rectangular through hole for a placing plate to pass through is formed in the left-right direction of the fixed seat;
and the power device is connected with the placing plate and is used for driving the placing plate to move along the left and right directions.
Furthermore, power device includes mounting bracket, actuating cylinder and control system, actuating cylinder horizontal installation is on the mounting bracket, the piston rod of actuating cylinder with place the board and link to each other.
Further, the driving cylinder is a hydraulic cylinder or an electric cylinder, and when the driving cylinder is a hydraulic cylinder, the control system is a hydraulic control system; when the driving cylinder is an electric cylinder, the control system is an electric control system.
Further, the mounting bracket includes mounting panel and L shaped plate, driving cylinder horizontal installation is on the mounting panel, the L shaped plate links to each other with the frame of plastics extruder, the vertical installation slot that is provided with on the up end of the vertical portion of L shaped plate, the lower extreme of mounting panel is inserted and is located in the installation slot, all be provided with the screw thread through-hole that accesss to the installation slot on the lateral wall of the vertical portion of L shaped plate and the diapire, and respectively install a fixing bolt in these screw thread through-holes.
Furthermore, the device also comprises two proximity switches, wherein the two proximity switches are electrically connected with the power device; when the two first circular through holes of the placing plate and the second circular through hole of the fixing seat share the same central axis, the placing plate is respectively positioned at a first station and a second station, and the two proximity switches are respectively used for detecting whether the placing plate is positioned at the first station or the second station.
Further, the upper end of the left side wall of the placing plate and the upper end of the right side wall of the placing plate are respectively provided with a threaded hole, an adjusting bolt is installed in each threaded hole, one proximity switch is arranged on the left side of the adjusting bolt installed at the upper end of the left side wall of the placing plate, the other proximity switch is arranged on the right side of the adjusting bolt installed at the upper end of the right side wall of the placing plate, when the left proximity switch detects the left adjusting bolt, the placing plate is located at the first station, and when the proximity switch on the right side detects the right adjusting bolt, the placing plate is located at the second station.
Furthermore, the placing groove is of a cylindrical groove structure, the first circular through hole and the placing groove share the same central axis, and the diameter of the placing groove is equal to the aperture of the second circular through hole of the fixing seat and is larger than the aperture of the first circular through hole; the outer side of each placing groove is provided with a first annular placing groove respectively on the front end surface and the rear end surface of the placing plate, and a first sealing ring is arranged in each first annular placing groove.
Furthermore, the device also comprises a pressure sensor, wherein the pressure sensor is used for detecting the pressure of the molten plastic in the machine barrel connected with the front end surface of the fixed seat, and the pressure sensor is electrically connected with a control system of the power device.
Furthermore, pressure sensor has the alarm through power device's control system electric connection, the alarm is provided with two, two the alarm send different alarm signal.
Furthermore, the pressure sensor is electrically connected with a heating device through a control system of the power device, and the heating device is used for heating the placing plate, the mesh baffle and the filter screen.
A method for replacing a filter screen of a filter device for a plastic extruder comprises the following steps:
1) setting two pressure thresholds with different pressure values in a control system of the power device, wherein the pressure thresholds are F1 and F2 respectively, and F1 is less than F2;
2) when the pressure value transmitted to the control system by the pressure sensor reaches F1, the control system controls the heating device to heat the mesh baffle plate to be replaced, the filter screen and the partial placing plate for mounting the mesh baffle plate and the filter screen, and the heating temperature is the same as the control temperature of the machine barrel connected with the front end surface of the fixed seat;
3) when the pressure value that the pressure sensor transmitted for control system reached F2, control system control heating device stopped heating, and the control actuating cylinder starts simultaneously, drives and places the board motion, and mesh baffle and the filter screen that will treat to change move to the fixing base in.
Compared with the prior art, the invention has the beneficial effects that:
1. the filter screen can be replaced without shutdown, so that the plastic extruder can continuously and normally produce, and the production efficiency of the plastic extruder can be effectively ensured.
2. Be provided with two proximity switches, through two proximity switches's setting, can carry out the automatic shutdown location to the shift position of placing the board for when placing the board and stopping, the filter screen always can be changed and install and target in place.
3. The adjusting bolt is arranged, so that allowance is reserved for the installation position of the proximity switch, the positioning and installation difficulty of the proximity switch is reduced, and the proximity switch is convenient to adjust when the installation position of the proximity switch is improper.
4. The pressure sensor is arranged, so that the blocking condition of the filter screen can be known through the arrangement of the pressure sensor, and the filter screen can be more reasonably replaced.
5. The pressure sensor is electrically connected with two alarms through a control system of the power device, and the two alarms send different alarm signals. Two pressure thresholds with different pressure values are set in a control system of the power device, wherein the pressure thresholds are respectively F1 and F2, F1 is less than F2, and F2 is the pressure threshold required by replacing a filter screen. When the pressure value transmitted to the control system by the pressure sensor reaches F1, the control system controls a first alarm to give an alarm, which is an early warning signal for replacing the filter screen; when the pressure value transmitted by the pressure sensor to the control system reaches F2, the control system controls a second alarm to give an alarm, namely an alarm signal for replacing the filter screen. So set up, the staff of being convenient for can be more timely carry out the change of filter screen.
6. The pressure sensor is electrically connected with a heating device through a control system of the power device, and the heating device is used for heating the placing plate, the mesh baffle and the filter screen. The heating temperature is the same with the control temperature of the machine barrel connected with the front end face of the fixing seat, so that after the filter screen is replaced, the quality problem of a plastic product caused by too large temperature difference of the filter screen, the placing plate and the mesh baffle before and after replacement can be avoided.
7. The invention provides a method for replacing a filter screen of a filter device for a plastic extruder, which can automatically replace the filter screen when the filter screen is blocked.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of a placing board in a first station according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a placing board in a second station according to an embodiment of the present invention;
FIG. 3 is a block diagram of an electrical control structure according to a first embodiment of the present invention;
FIG. 4 is a perspective view of the placement board of the present invention;
FIG. 5 is a schematic perspective view of a mesh baffle of the present invention;
FIG. 6 is a perspective view of the anchor block of the present invention;
FIG. 7 is a schematic perspective view of the L-shaped plate of the present invention;
FIG. 8 is a schematic structural view of a second embodiment of the present invention when the placing board is located at the first station;
FIG. 9 is a schematic structural view of a second embodiment of the present invention when the placing board is located at the second station;
fig. 10 is a block diagram of an electrical control structure of a second embodiment of the present invention;
fig. 11 is a schematic structural diagram of a heating apparatus according to a second embodiment of the present invention.
In the figure: 1. a filter screen; 2. placing the plate; 201. placing a groove; 202. a first circular through hole; 203. a first annular placing groove; 3. a mesh baffle plate; 4. a fixed seat; 401. a second circular through hole; 402. a rectangular through hole; 403. a second annular placement groove; 5. a drive cylinder; 6. mounting a plate; 7. an L-shaped plate; 701. installing a slot; 8. fixing the bolt; 9. a proximity switch; 10. adjusting the bolt; 11. a first seal ring; 12. a pressure sensor; 13. an alarm; 14. and a second seal ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The first embodiment is as follows:
the utility model provides a filter equipment for plastic extruder, includes filter screen 1, still includes: place board 2, mesh baffle 3, fixing base 4 and power device.
The fixed seat 4 is connected with a machine barrel of the plastic extruder, the front end and the rear end of the fixed seat are respectively connected with a machine barrel, and a molding neck mold is arranged in the machine barrel at the rear end. Referring to fig. 6, a second circular through hole 401 is formed in the fixing base 4 along the front-rear direction for passing molten plastic, the molten plastic in the barrel at the front end of the fixing base 4 flows into the barrel at the rear end of the fixing base 4 through the second circular through hole 401, and a rectangular through hole 402 is formed in the fixing base 4 along the left-right direction. The holder 4 can be welded together with the front and rear barrels to form a single unit, which contains the holder 4. When the fixing seat 4 is connected with the front end cylinder and the rear end cylinder through bolts, as shown in fig. 1 and fig. 6, a second annular placing groove 403 is respectively arranged on the front end surface and the rear end surface of the fixing seat 4, a second sealing ring 14 is respectively placed in each second annular placing groove, and the problem of material leakage between the fixing seat 4 and the cylinder can be prevented under the action of the second sealing ring 14. The second seal ring 14 is made of a heat-resistant rubber material such as silicone rubber, fluororubber, or nitrile rubber.
Referring to fig. 1 and 4, the placing plate 2 is rectangular, and two placing grooves 201 are formed on a front end surface of the placing plate 2, and the two placing grooves 201 are sequentially formed along a left-right direction. Placing recess 201 is cylindrical groove structure, is provided with the first circular through-hole 202 that supplies the molten plastic to pass through on the groove diapire wall of placing recess 201, first circular through-hole 202 with place recess 201 and be the central axis altogether, the diameter of placing recess 201 equals the aperture of the second circular through-hole 401 of fixing base 4 and is greater than the aperture of first circular through-hole 202. The placing plate 2 is disposed in the rectangular through hole 402 of the fixing base 4 and can slide along the rectangular through hole 402.
Referring to fig. 1 and 5, the mesh baffle 3 is provided with material through holes for molten plastic to pass through, the mesh baffle 3 and the filter screen 1 are both placed in the placing groove 201, and the mesh baffle 3 is located at the rear side of the filter screen 1. The material in the machine barrel of the plastic extruder enters the second round through hole 401 of the fixed seat 4, is filtered by the filter screen 1 and then flows out of the material penetrating holes of the mesh baffle 3 to enter the machine barrel of the mounting and forming die. A first annular placing groove 203 is provided on each of the front and rear end surfaces of the placing plate 2 outside each placing groove 201, and the first seal ring 11 is provided in the first annular placing groove 203. Under the effect of first sealing washer 11, can prevent to place and take place the hourglass material problem between board 2 and the fixing base 4. The first seal ring 11 is made of a heat-resistant rubber material such as silicone rubber, fluororubber, or nitrile rubber.
Referring to fig. 1 and 7, the power device includes a mounting frame, a driving cylinder 5 and a control system, and a piston rod of the driving cylinder 5 is connected to the placing plate 2. The mounting bracket includes mounting panel 6 and L shaped plate 7, and 5 horizontal installations of actuating cylinder are on mounting panel 6, and L shaped plate 7 links to each other with the frame of plastics extruder or other fixed bolster, and the vertical installation slot 701 that is provided with on the up end of the 7 vertical portions of L shaped plate, and the lower extreme of mounting panel 6 is inserted and is located in the installation slot, all is provided with the screw through-hole that accesss to installation slot 701 on the lateral wall of the 7 vertical portions of L shaped plate and the diapire, and respectively installs a fixing bolt 8 in these screw through-holes. Through the setting, can highly adjust mounting panel 6 and actuating cylinder 5, the actuating cylinder 5 of being convenient for more highly can keep unanimous with the high position of placing board 2, has reduced the counterpoint installation degree of difficulty after the later stage maintenance.
The driving cylinder 5 uses an electric cylinder, the control system is an electric control system for controlling the electric cylinder to move, a single chip microcomputer controller or a PLC (programmable logic controller) can be selected as a main control element of the electric control system, and the driving cylinder 5 drives the placing plate 2 to move left and right. As shown in fig. 1, when the driving cylinder 5 drives the placing plate 2 to move to the center axis of the first circular through hole 202 on the right side of the placing plate 2 and the second circular through hole 401 of the fixing base 4, the placing plate 2 is located at the first station. As shown in fig. 2, when the driving cylinder 5 drives the placing plate 2 to move to the central axis of the first circular through hole 202 on the left side of the placing plate 2 and the second circular through hole 401 of the fixing base 4, the placing plate 2 is located at the second station.
The working principle of the invention is as follows: two placing grooves 201 of the placing plate 2 are respectively provided with a mesh baffle plate 3 and at least one layer of filter screen 1. Assuming that the plastic extruder is in production, the laying plate 2 is in the first station, as shown in fig. 1. When filter screen 1 needs to be changed, start driving cylinder 5, driving cylinder 5 drives and places board 2 and remove right, drives and places board 2 and remove to the circular through-hole 401 of second of placing board 2 left first circular through-hole 202 and fixing base 4 when the central axis is altogether, stop moving when driving cylinder 5 drives, places board 2 and is located the second station this moment, has accomplished filter screen 1's change promptly. The filter net 1 blocked in the placing groove 201 on the right side of the placing plate 2 is then replaced, and the next replacement is waited.
Therefore, use the filter equipment for plastic extruder that this application provided, can carry out filter screen 1's change under the circumstances of not shutting down for plastic extruder can last normal production, can effectively guarantee plastic extruder's production efficiency.
Referring to fig. 1, 2 and 3, the device is further provided with two proximity switches 9, and the two proximity switches 9 are electrically connected with a control system of the power device. Of the two proximity switches 9, one proximity switch 9 is provided on the left side of the placement board 2, and the other proximity switch 9 is provided on the right side of the placement board 2. When the left proximity switch 9 detects the placing plate 2, the left proximity switch 9 transmits a signal to the control system, the control system controls the electric cylinder to stop moving, and at the moment, the placing plate 2 is located at the first station. When the proximity switch 9 on the right side detects the placing plate 2, the proximity switch 9 on the right side transmits a signal to the control system, the control system controls the electric cylinder to stop moving, and at the moment, the placing plate 2 is located at the second station. Therefore, through the arrangement of the two proximity switches 9, the moving position of the placing plate 2 can be automatically stopped and positioned, so that the filter screen 1 can be always replaced and installed in place when the placing plate 2 stops.
In order to leave allowance for the installation position of the proximity switch 9, reduce the positioning installation difficulty of the proximity switch 9, and facilitate adjustment when the installation position of the proximity switch 9 is improper, so that the placing plate 2 can be correctly stopped at the first station and the second station, the upper end of the left side wall and the upper end of the right side wall of the placing plate 2 are respectively provided with a threaded hole, and an adjusting bolt 10 is respectively installed in each threaded hole in the two threaded holes in a threaded manner, as shown in fig. 1 and 2. The left proximity switch 9 is provided on the left side of an adjusting bolt 10 mounted on the upper end of the left side wall of the placing plate 2, such as on the mounting plate 6. The proximity switch 9 on the right side is arranged on the right side of an adjusting bolt 10 arranged at the upper end of the right side wall of the placing plate 2, and a fixing frame can be additionally arranged for installation. The two proximity switches 9 do not directly detect the placing plate 2, but indirectly detect the placing plate 2 by detecting the two adjusting bolts 10. The distance between the head of the adjusting bolt 10 and the placing plate 2 can be adjusted by screwing the adjusting bolt 10, namely, the distance between the adjusting bolt 10 and the proximity switch 9 can be adjusted. After proximity switch 9 installs the completion, when proximity switch 9 detected adjusting bolt 10, when electronic jar did not can accurately stop on first station or second station, the accessible was twisted adjusting bolt 10 and is carried out suitable adjustment to when proximity switch 9 detected adjusting bolt 10, electronic jar can accurately stop at first station or second station.
Example two:
the utility model provides a filter equipment for plastic extruder, includes filter screen 1, still includes: place board 2, mesh baffle 3, fixing base 4 and power device.
The fixed seat 4 is connected with a machine barrel of the plastic extruder, the front end and the rear end of the fixed seat are respectively connected with a machine barrel, and a molding neck mold is arranged in the machine barrel at the rear end. Referring to fig. 6, a second circular through hole 401 is formed in the fixing base 4 along the front-rear direction for passing molten plastic, the molten plastic in the barrel at the front end of the fixing base 4 flows into the barrel at the rear end of the fixing base 4 through the second circular through hole 401, and a rectangular through hole 402 is formed in the fixing base 4 along the left-right direction. The holder 4 can be welded together with the front and rear barrels to form a single unit, which contains the holder 4. When the fixing seat 4 is connected with the front end cylinder and the rear end cylinder through bolts, as shown in fig. 8 and 6, the front end surface and the rear end surface of the fixing seat 4 are respectively provided with a second annular placing groove 403, each of which is provided with a second sealing ring 14, and under the action of the second sealing rings 14, the problem of material leakage between the fixing seat 4 and the cylinder can be prevented. The second seal ring 14 is made of a heat-resistant rubber material such as silicone rubber, fluororubber, or nitrile rubber.
Referring to fig. 8 and 4, the placing plate 2 is rectangular, and two placing grooves 201 are formed on the front end surface of the placing plate 2, and the two placing grooves 201 are sequentially formed along the left-right direction. Placing recess 201 is cylindrical groove structure, is provided with the first circular through-hole 202 that supplies the molten plastic to pass through on the groove diapire wall of placing recess 201, first circular through-hole 202 with place recess 201 and be the central axis altogether, the diameter of placing recess 201 equals the aperture of the second circular through-hole 401 of fixing base 4 and is greater than the aperture of first circular through-hole 202. The placing plate 2 is disposed in the rectangular through hole 402 of the fixing base 4 and can slide along the rectangular through hole 402.
Referring to fig. 8 and 5, the mesh baffle 3 is provided with material through holes for molten plastic to pass through, the mesh baffle 3 and the filter screen 1 are both placed in the placing groove 201, and the mesh baffle 3 is located at the rear side of the filter screen 1. The material in the machine barrel of the plastic extruder enters the second round through hole 401 of the fixed seat 4, is filtered by the filter screen 1 and then flows out of the material penetrating holes of the mesh baffle 3 to enter the machine barrel of the mounting and forming die. A first annular placing groove 203 is provided on each of the front and rear end surfaces of the placing plate 2 outside each placing groove 201, and the first seal ring 11 is provided in the first annular placing groove 203. Under the effect of first sealing washer 11, can prevent to place and take place the hourglass material problem between board 2 and the fixing base 4. The first seal ring 11 is made of a heat-resistant rubber material such as silicone rubber, fluororubber, or nitrile rubber.
Referring to fig. 8 and 7, the power device comprises a mounting frame, a driving cylinder 5 and a control system, wherein a piston rod of the driving cylinder 5 is connected with the placing plate 2. The mounting bracket includes mounting panel 6 and L shaped plate 7, and 5 horizontal installations of actuating cylinder are on mounting panel 6, and L shaped plate 7 links to each other with the frame of plastics extruder or other fixed bolster, and the vertical installation slot 701 that is provided with on the up end of the 7 vertical portions of L shaped plate, and the lower extreme of mounting panel 6 is inserted and is located in the installation slot, all is provided with the screw through-hole that accesss to installation slot 701 on the lateral wall of the 7 vertical portions of L shaped plate and the diapire, and respectively installs a fixing bolt 8 in these screw through-holes. Through the setting, can highly adjust mounting panel 6 and actuating cylinder 5, the actuating cylinder 5 of being convenient for more highly can keep unanimous with the high position of placing board 2, has reduced the counterpoint installation degree of difficulty after the later stage maintenance.
The actuating cylinder 5 uses the pneumatic cylinder, and control system is the hydraulic control system of control hydraulic cylinder motion, and single chip microcomputer controller or PLC controller can be chooseed for use to hydraulic control system's main control component for electric elements such as control oil pump, valve, actuating cylinder 5 drives and places board 2 and remove. As shown in fig. 8, when the driving cylinder 5 drives the placing plate 2 to move to the center axis of the first circular through hole 202 on the right side of the placing plate 2 and the second circular through hole 401 of the fixing base 4, the placing plate 2 is located at the first station. As shown in fig. 9, when the driving cylinder 5 drives the placing plate 2 to move to the position where the first circular through hole 202 on the left side of the placing plate 2 is coaxial with the second circular through hole 401 of the fixing base 4, the placing plate 2 is located at the second station.
Referring to fig. 8, 9 and 10, the device is further provided with two proximity switches 9, and the two proximity switches 9 are electrically connected with the control system of the power device. Of the two proximity switches 9, one proximity switch 9 is provided on the left side of the placement board 2, and the other proximity switch 9 is provided on the right side of the placement board 2. When the left proximity switch 9 detects the placing plate 2, the left proximity switch 9 transmits a signal to the control system, the control system controls the hydraulic cylinder to stop moving, and at the moment, the placing plate 2 is located at the first station. When the proximity switch 9 on the right side detects the placing plate 2, the proximity switch 9 on the right side transmits a signal to the control system, the control system controls the hydraulic cylinder to stop moving, and at the moment, the placing plate 2 is located at the second station. Therefore, through the arrangement of the two proximity switches 9, the moving position of the placing plate 2 can be automatically stopped and positioned, so that the filter screen 1 can be always replaced and installed in place when the placing plate 2 stops.
The left proximity switch 9 is provided on the left side of an adjusting bolt 10 mounted on the upper end of the left side wall of the placing plate 2, such as on the mounting plate 6. The proximity switch 9 on the right side is arranged on the right side of an adjusting bolt 10 arranged at the upper end of the right side wall of the placing plate 2, and a fixing frame can be additionally arranged for installation. The two proximity switches 9 do not directly detect the placing plate 2, but indirectly detect the placing plate 2 by detecting the two adjusting bolts 10.
Referring to fig. 10, the apparatus further includes a pressure sensor 12, the pressure sensor 12 is mounted on the barrel connected to the front end surface of the fixed base 4 and is used for detecting the pressure of the molten plastic in the barrel connected to the front end surface of the fixed base 4, the pressure sensor 12 may use a high-temperature melt pressure sensor of PT124G series, and the pressure sensor 12 is electrically connected to the control system of the power unit. The pressure change of the molten plastic in the machine barrel connected with the front end surface of the fixed seat 4 can reflect the blocking condition of the filter screen 1, and during normal production, the larger the pressure detected by the pressure sensor 12 is, the more serious the blocking condition of the filter screen 1 is. Therefore, the clogging of the filter screen 1 can be known by the installation of the pressure sensor 12, and the filter screen 1 can be replaced more appropriately.
Referring to fig. 10, the pressure sensor 12 is electrically connected to two alarm devices 13 through a control system of the power device, and the two alarm devices 13 send different alarm signals. For example, one alarm 13 emits an acoustic signal, or two alarms 13 emit different acoustic signals, etc. Two pressure thresholds with different pressure values are set in a control system of the power device, wherein the pressure thresholds are respectively F1 and F2, F1 is less than F2, and F2 is the pressure threshold required by replacing the filter screen 1. When the pressure value transmitted to the control system by the pressure sensor 12 reaches F1, the control system controls the first alarm 13 to give an alarm, which is an early warning signal for replacing the filter screen 1; when the pressure value transmitted by the pressure sensor 12 to the control system reaches F2, the control system controls the second alarm 13 to alarm, which is an alarm signal for replacing the filter screen 1. So set up, the staff of being convenient for can be more timely carry out the change of filter screen 1.
Referring to fig. 10, the pressure sensor 12 is electrically connected to a heating device through a control system of the power device, and the heating device is used for heating the placing plate 2, the mesh baffle 3 and the filter screen 1. The heating device can be in a structure as shown in fig. 11, and the vertical electric cylinder drives the U-shaped heating plate to form a structure, and two groups of heating devices are arranged to respectively heat the placing plate 2 of the first station and the placing plate 2 of the second station. During heating, the vertical electric cylinder drives the U-shaped heating plate to move upwards, so that the placing plate 2 is positioned in the U-shaped heating. The heating device can also be a structural form of hot air blowing heating, comprises heating wires, a temperature control system, a fan, pipelines, valves and the like, and also comprises two groups, at least two air outlet pipe openings are arranged, and the two groups of heating devices respectively heat the placing plate 2 at the first station and the placing plate 2 at the second station. No matter what kind of structural style's heating device, all should control its heating temperature, heating temperature is the same with the control temperature of the barrel that the terminal surface is connected before the fixing base 4 for after having changed filter screen 1, can not because the too big quality problems that leads to the plastics product of temperature difference of filter screen 1, placing board 2 and mesh baffle 3 before changing around having changed.
The filtering device for the plastic extruder provided by the embodiment can automatically replace the filter screen 1, and the replacement method comprises the following steps:
1) setting two pressure thresholds with different pressure values in a control system of the power device, wherein the pressure thresholds are F1 and F2 respectively, and F1 is less than F2;
2) when the pressure value transmitted to the control system by the pressure sensor 12 reaches F1, the control system controls the heating device to heat the mesh baffle 3 to be replaced, the filter screen 1 and the partial placing plate 2 for installing the mesh baffle 3 and the filter screen 1, and the heating temperature is the same as the control temperature of the machine barrel connected with the front end surface of the fixed seat 4;
3) when the pressure value transmitted to the control system by the pressure sensor 12 reaches F2, the control system controls the heating device to stop heating, and controls the driving cylinder 5 to start, so as to drive the placing plate 2 to move, and move the mesh baffle 3 to be replaced and the filter screen 1 to the fixed seat 4.
When the pressure value transmitted to the control system by the pressure sensor 12 reaches F1, the mesh baffle 3 and the filter screen 1 to be replaced and the partial placing plate 2 for installing the mesh baffle 3 and the filter screen 1 are heated, so that the energy is saved. After the filter screen 1 is replaced, the control system simultaneously controls the second alarm 13 to give an alarm to remind a worker to replace the blocked filter screen 1, so that the filter screen 1 can be replaced next time.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. The utility model provides a filter equipment for plastic extruder, includes the filter screen, its characterized in that still includes:
the placing plate is rectangular, two placing grooves are formed in the front end face of the placing plate, and the two placing grooves are sequentially arranged along the left direction and the right direction; a first circular through hole for molten plastic to pass through is formed in the bottom wall of the groove for placing the groove;
the mesh baffle and the filter screen are both placed in the placing groove, the mesh baffle is positioned on the rear side of the filter screen, and material through holes for molten plastic to pass through are formed in the mesh baffle;
the fixed seat is connected with a machine barrel of the plastic extruder, a second circular through hole for molten plastic to pass through is formed in the front-back direction of the fixed seat, and a rectangular through hole for a placing plate to pass through is formed in the left-right direction of the fixed seat;
and the power device is connected with the placing plate and is used for driving the placing plate to move along the left and right directions.
2. The filtering device for plastic extruder according to claim 1, wherein: the power device comprises an installation frame, a driving cylinder and a control system, the driving cylinder is horizontally installed on the installation frame, and a piston rod of the driving cylinder is connected with the placing plate.
3. The filtering device for plastic extruder according to claim 2, wherein: the driving cylinder is a hydraulic cylinder or an electric cylinder, and when the driving cylinder is the hydraulic cylinder, the control system is a hydraulic control system; when the driving cylinder is an electric cylinder, the control system is an electric control system.
4. The filtering device for plastic extruder according to claim 2, wherein: the mounting bracket includes mounting panel and L shaped plate, driving cylinder horizontal installation is on the mounting panel, the L shaped plate links to each other with the frame of plastics extruder, the vertical installation slot that is provided with on the up end of the vertical portion of L shaped plate, the lower extreme of mounting panel is inserted and is located in the installation slot, all be provided with the screw thread through-hole that accesss to the installation slot on the lateral wall of the vertical portion of L shaped plate and the diapire, and respectively install a fixing bolt in these screw thread through-holes.
5. The filtering device for plastic extruder according to claim 2, wherein: the two proximity switches are electrically connected with the power device; when the two first circular through holes of the placing plate and the second circular through hole of the fixing seat share the same central axis, the placing plate is respectively positioned at a first station and a second station, and the two proximity switches are respectively used for detecting whether the placing plate is positioned at the first station or the second station.
6. The filtering device for plastic extruder according to claim 5, wherein: the upper end of placing the board left side wall and the upper end of right side wall respectively are provided with a screw hole, and each screw thread installs an adjusting bolt in these two screw holes, and among two proximity switch, a proximity switch sets up in the left side of placing the adjusting bolt of board left side wall upper end installation, and another proximity switch sets up in the right side of placing the adjusting bolt of board right side wall upper end installation, when left proximity switch detected left adjusting bolt, place the board and be located first station, when the proximity switch on right side detected the adjusting bolt on right side, place the board and be located the second station.
7. The filtering device for plastic extruder according to claim 6, wherein: the placing groove is of a cylindrical groove structure, the first circular through hole and the placing groove share the same central axis, and the diameter of the placing groove is equal to the aperture of the second circular through hole of the fixing seat and is larger than the aperture of the first circular through hole; the outer side of each placing groove is provided with a first annular placing groove respectively on the front end surface and the rear end surface of the placing plate, and a first sealing ring is arranged in each first annular placing groove.
8. The filtering apparatus for plastic extruder according to any one of claims 2 to 7, wherein: the pressure sensor is used for detecting the pressure of the molten plastic in the machine barrel connected with the front end face of the fixed seat, and the pressure sensor is electrically connected with a control system of the power device.
9. The filtering device for plastic extruder according to claim 8, wherein: the pressure sensor is electrically connected with an alarm through a control system of the power device, and the alarm is provided with two alarms which send out different alarm signals.
10. The filtering device for plastic extruder according to claim 9, wherein: the pressure sensor is electrically connected with a heating device through a control system of the power device, and the heating device is used for heating the placing plate, the mesh baffle and the filter screen.
11. A method for replacing a filter screen of a filter device for a plastic extruder is characterized by comprising the following steps: the filter unit for a plastic extruder of claim 10, for replacing a filter net, comprising the steps of:
1) setting two pressure thresholds with different pressure values in a control system of the power device, wherein the pressure thresholds are F1 and F2 respectively, and F1 is less than F2;
2) when the pressure value transmitted to the control system by the pressure sensor reaches F1, the control system controls the heating device to heat the mesh baffle plate to be replaced, the filter screen and the partial placing plate for mounting the mesh baffle plate and the filter screen, and the heating temperature is the same as the control temperature of the machine barrel connected with the front end surface of the fixed seat;
3) when the pressure value that the pressure sensor transmitted for control system reached F2, control system control heating device stopped heating, and the control actuating cylinder starts simultaneously, drives and places the board motion, and mesh baffle and the filter screen that will treat to change move to the fixing base in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110635883.3A CN113232269A (en) | 2021-06-08 | 2021-06-08 | Filtering device for plastic extruder and method for replacing filtering net |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110635883.3A CN113232269A (en) | 2021-06-08 | 2021-06-08 | Filtering device for plastic extruder and method for replacing filtering net |
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| CN113232269A true CN113232269A (en) | 2021-08-10 |
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| CN202110635883.3A Pending CN113232269A (en) | 2021-06-08 | 2021-06-08 | Filtering device for plastic extruder and method for replacing filtering net |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2058879U (en) * | 1989-11-04 | 1990-07-04 | 北京化工学院 | Hydraulic two-working-position filting converting device |
| EP0925904A1 (en) * | 1997-12-23 | 1999-06-30 | BACHER, Helmut | Method and device for changing the screen of a filtering apparatus |
| CN102229236A (en) * | 2011-06-02 | 2011-11-02 | 张家港市同创机械有限公司 | Filter device in breathing mask production line |
| CN102896762A (en) * | 2012-11-01 | 2013-01-30 | 柳州市华工百川橡塑科技有限公司 | Device for full-automatically replacing rubber filtering net |
| CN206884135U (en) * | 2017-06-30 | 2018-01-16 | 温州银润包装有限公司 | A kind of plastic extruder for being conveniently replaceable filter screen |
| CN206967908U (en) * | 2017-05-27 | 2018-02-06 | 山东隆昌塑业有限公司 | Plastic extruder having filter screen replaced without shutdown |
| CN211194860U (en) * | 2019-11-08 | 2020-08-07 | 常州市晨光机械制造有限公司 | Double-station inserting plate type screen changer |
| CN211752878U (en) * | 2020-03-25 | 2020-10-27 | 廊坊市中油嘉昱防腐技术有限公司 | Molten state anticorrosive material filter equipment |
-
2021
- 2021-06-08 CN CN202110635883.3A patent/CN113232269A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2058879U (en) * | 1989-11-04 | 1990-07-04 | 北京化工学院 | Hydraulic two-working-position filting converting device |
| EP0925904A1 (en) * | 1997-12-23 | 1999-06-30 | BACHER, Helmut | Method and device for changing the screen of a filtering apparatus |
| CN102229236A (en) * | 2011-06-02 | 2011-11-02 | 张家港市同创机械有限公司 | Filter device in breathing mask production line |
| CN102896762A (en) * | 2012-11-01 | 2013-01-30 | 柳州市华工百川橡塑科技有限公司 | Device for full-automatically replacing rubber filtering net |
| CN206967908U (en) * | 2017-05-27 | 2018-02-06 | 山东隆昌塑业有限公司 | Plastic extruder having filter screen replaced without shutdown |
| CN206884135U (en) * | 2017-06-30 | 2018-01-16 | 温州银润包装有限公司 | A kind of plastic extruder for being conveniently replaceable filter screen |
| CN211194860U (en) * | 2019-11-08 | 2020-08-07 | 常州市晨光机械制造有限公司 | Double-station inserting plate type screen changer |
| CN211752878U (en) * | 2020-03-25 | 2020-10-27 | 廊坊市中油嘉昱防腐技术有限公司 | Molten state anticorrosive material filter equipment |
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Application publication date: 20210810 |
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