CA2050139A1 - Method and apparatus for feeding pourable material into an inlet opening of a processing machine - Google Patents
Method and apparatus for feeding pourable material into an inlet opening of a processing machineInfo
- Publication number
- CA2050139A1 CA2050139A1 CA002050139A CA2050139A CA2050139A1 CA 2050139 A1 CA2050139 A1 CA 2050139A1 CA 002050139 A CA002050139 A CA 002050139A CA 2050139 A CA2050139 A CA 2050139A CA 2050139 A1 CA2050139 A1 CA 2050139A1
- Authority
- CA
- Canada
- Prior art keywords
- storage container
- filling
- outlet opening
- intermediate storage
- conveying means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000000463 material Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000003860 storage Methods 0.000 claims abstract description 45
- 238000012432 intermediate storage Methods 0.000 claims abstract description 30
- 239000008187 granular material Substances 0.000 claims abstract description 18
- 229920002994 synthetic fiber Polymers 0.000 claims abstract description 6
- 238000005303 weighing Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
- B29C31/02—Dispensing from vessels, e.g. hoppers
-
- 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
- B29B7/60—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
- B29B7/603—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material in measured doses, e.g. proportioning of several materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material
- G01G13/02—Means for automatically loading weigh pans or other receptacles, e.g. disposable containers, under control of the weighing mechanism
- G01G13/022—Material feeding devices
- G01G13/024—Material feeding devices by gravity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material
- G01G13/24—Weighing mechanism control arrangements for automatic feed or discharge
- G01G13/247—Checking quantity of material in the feeding arrangement, e.g. discharge material only if a predetermined quantity is present
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
-
- 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
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/286—Raw material dosing
-
- 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
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Robotics (AREA)
- Basic Packing Technique (AREA)
Abstract
Abstract This invention refers to a method for feeding pourable material, preferably granulated material, into an inlet open-ing of an extruder for synthetic material, with a storage container provided with a conveying means for the filling thereof and with a closable outlet opening at the bottom, and with an intermediate storage container supported on a weighing means or provided with a filling level measuring means, said intermediate storage container being filled with material in correspondence with its filling weight or the filling level and provided with a bottom-side outlet opening leading into the inlet opening. For the solution of this problem to further develop such a method in a manner that a storage container arrangement of a lower overall height and with a simpler con-trol can be used, the storage container is discharged complete-ly or partially in dependency on the filling ratio of the intermediate storage container thereinto by opening of its outlet opening, and after closing the outlet opening the storage container is again filled up with granulated material with a predeterminable filling ratio.
Description
205~139 NETHOD AND APPARATUS FOR FEEDING POUR~BLE MATERIAL INTO AN
INLET OPENING OF A PROCESSING MACHINE
BACKGROUND OF THE INVENTION
Field of the Invention This invention refers to a method for feeding pourable material, preferably granulated material, into an inlet opening of a processing machine, preferably an extruder for synthetic material, with a storage container provided with a conveying means for the filling thereof and with a closable outlet opening at the bottom, and with an intermediate storage container supported on a weighing means or provided with a filling level measuring means, said intermediate storage container being filled with material in correspondence with its filling weight or the filling level and provided with a bottom-side outlet opening leading into the inlet opening.
Description of Prior Art The correct and troublefree functioning of machines processing pourable material often depends on said material being supplied uniformly, i.e. under a substantially constant pressure. In principle, an extruder for synthetic material only then works satisfactorily, when the granulated synthetic materials and, if necessary, materials added thereto are fed to the extruder at a constant rate. This can for instance be ensured by the fact that in the feeding hopper or in an intermediate storage container corresponding to the feeding hopper or substituting it, a sufficient amount of material is constantly maintained which ensures a continuous feeding of the material into the extruder.
On the basis of Fig. 1 and 2 of the drawings, a known method as well as a known apparatus will be described in the 2051~39 following, by means of which granulated material or any other pourable material can be fed to an extruder for synthetic material such that it can be uniformly drawn in. Above the inlet opening 2 of a part of an extruder 1 (only schematically shown) a lower intermediate storage container 3 being designed as a proportioning weigher is arranged in a hanging position. Said lower intermediate storage container 3 is carried by a supporting arm 4 which is connected to the machine frame in the shown manner and which has an extensometer 5. Above the lower intermediate storage container 3 designed as a proportioning weigher there is arranged a further funnel-shaped upper intermediate storage container 6 with the bottom outlet 7 thereof being provided with a slide closing means 8 by which the outlet 7 can be closed and opened. On the cover of said further upper intermediate storage container 6 there is arranged a storage container 9 the cover of which carries an extractor 10. The funnel-shaped outlet 11 of said storage container 9 can be closed by a pivotally supported flap 12 provided with a tension spring 13 acting upon said flap in closing direction.
In its upper part the storage container 9 is provided with a filling level measuring means 14 detecting the upper filling limit for the suctioned granulated material in the storage container 9. The granulated material 15 is supplied to the storage container 9 via a suction pipe 16.
In Fig. 1 there is shown the condition in which the extractor 10 is turned on and the flap 12 closed so that to the storage container 9 granulated material is supplied via the suction pipe 16 up to a filling level height predetermined by the filling level measuring means 14. When the granulated material reaches at the filling level measuring means 14, the extractor 10 is turned off by a switch operated by the filling level measuring means.
Z05(~39 When the storage container 9 has been filled with granulated material up to the height predetermined by the filling level measuring means 14 and when then the extractor is turned off, the flap 12 is pressed open by the weight of the granulated material stored in the storage container 9, since the closing spring 13 is designed to have approximately that strength as to being able to close the flap when there is no filling pressure or only a minor filling pressure exerted thereon.
During the filling of the storage container 9 the flap 12 is kept in its closing position due to the negative pressure existing in the storage container.
During the filling of the storage container 9 with granulated material, the slide 8 can be pulled open in dependency on the filling weight detected by the proportioning weigher so that the granulated material flows from the further intermediate storage container 6 into the lower storage container 3. The slide 8 is again brought into its closing position as soon as the proportioning weigher detects a sufficient filling amount in the lower intermediate storage container 3. The command for pulling the slide 8 open comes from a signal derived from the extensometer 5.
In Fig. 2 there is shown the condition in which the extractor 10 has been turned off after reaching the filling height detected by the filling level measuring means 14 and the storage container 9 is discharged into the upper intermediate storage container 6 by the fact that the flap 12 is pressed open due to the weight of the filling load. However, when the upper intermediate storage container 6 is filled in the manner according to Fig. 2, the flap 12 can no longer be closed since it is blocked by the material piled up in the _ 4 _ 20S~39 upper intermediate storage container. The closing spring 13 can only then move the flap 12 again in its closing position when the upper intermediate storage container 6 has been dis-charged into the lower intermediate container 3 after pulling the slide 8 open so that the flap 12 is no longer blocked by the piled up material.
In the known apparatus described on the basis of Fig. 1 and 2, the extractor 10 is always turned on when the flap 12 is closed. The filling of the storage container 9 is then terminated by turning off the extractor 10, when the filling level has reached the level of the filling level measuring means 14. Independent of the control of the filling of the storage container 9, the opening movement and closing movement of the slide 8 is controlled by the proportioning weigher or the extensometer S such that the slide 8 is opened when a lower filling level is reached and closed again when an upper filling level is detected due to the corresponding weight.
The apparatus explained on the basis of Fig. 1 and 2 does not only have a considerable overall height due to the arrangement of the three containers one on top of the other, but due to the two control means being operated independently of each other for filling and discharging the three containers it is also of a relatively high technical expenditure.
Summary of the Invention Therefore it is the ob~ect of the invention to provide a method and an apparatus which enable a storage container arrangement of a lower overall height and with a simpler con-trol.
20S~39 According to the invention this problem is solved for a method of the kind mentioned hereinbefore in that the storage container is discharged completely or partially in dependency on the filling ratio of the intermediate storage container thereinto by opening of its outlet opening, and after closing the outlet opening, the storage container is again filled up with granulated material with a predetermined filling ratio.
The method according to the invention enables the constant supply of material to a processing machine with only one storage container and one intermediate container, the closing means of the storage container and the conveying means filling it only being controlled in dependency on the filling weight or the filling ratio of the lower intermediate storage container. In addition, the conveying means filling the upper storage container are controlled by its upper filling level, which provides an upper threshold for stopping the converging means. Thus, the apparatus operating according to the inventive method consists of only two containers and one control means controlling the filling as well as the opening action for discharging and the closing of the upper storage container.
The filling ratio of the intermediate storage container is the filling weight relating to the upper and lower thresholds. When the weight reaches the lower threshold, the gate is opened when the filling weight reaches the upper threshold, the gate is closed.
An apparatus for carrying out the method according to the invention is characterized according to the invention in that the closing means of the outlet opening are provided with a switch means turning on the conveying means during or after the closing of the outlet opening, and that the weighing or filling level measuring means generates a signal after .
205~3139 reaching the predetermined filling ratio, said signal turning off the conveying means.
The conveying means filling the storage container with material can be a suction conveying means.
Advantageously, a conveying pipe leads into the upper portion of the portion of the storage container, the storage container being closed by a cover provided with an extractor fan.
In an alternative embodiment, the filling levels may be used to trigger opening and closing of the gate, but the filling weight is preferred.
The intermediate storage container can be carried by a supporting arm connected with the machine frame, which can be provided with at least one extensometer for the detection of the filling weight. Thus the intermediate storage container has the function of a proportioning weigher, the closing means of the storage container being opened and closed in correspondence with the filling weight by signals generated by the proportioning weigher.
one embodiment of the invention will now be described in the following with reference to Fig. 3 of the drawing.
Detailed DescriPtion of Preferred Embodiment The structure and the mounting of the lower intermediate container 3' correspond to the structure and the mounting of the lower intermediate container 3 according to Fig. 1 and 2.
The lower intermediate container 3' has a funnel-like form in its lower section and is provided with an outlet leading into 2(~50139 the inlet opening 2' of the extruder 1'. The lower intermediate container 3' is connected with the machine frame by a supporting arm 4' provided with at least one extensometer 5', so that it shows the function of a proportioning weigher.
Above the lower intermediate container 3' there is arranged an upper storage container 9' of greater volume than the lower intermediate container 3' and with its lower outlet 7' being closable by a slide or gate 8'. Into the upper section of the storage container 9' there leads a conveying pipe designed as a suction pipe 16'. The cover of the storage container 9' is provided with an extractor lo' by the operation of which granulated material can be suctioned in through the suction pipe 16'. The storage container 9' is provided with a filling level measuring means 14' which detects the maximum admissible filling level height in the storage container 9'.
In the operating state as shown in Fig. 3, the slide 8' is opened so that granulated material can flow into the lower intermediate container 3' constituting a proportioning weigher. By opening the slide 8' there is simultaneously produced a signal which prevents the extractor 10' from being turned on. The slide 8' is closed as soon as a signal derived from the extensometer 5' indicates that in the lower ^~
intermediate storage container 3' there is a sufficient weight of material or that the filling ratio of the lower intermediate storage container 3' is not increasing. On closing the slide 8' there is directly produced a signal which turns on the extractor 10'. The extractor 10' remains turned on until by the suction pipe 16' such an amount of granulated material has been suctioned into the intermediate storage container 9' that the filling level measuring means -8- ~05~39 14' is activated by the increasing filling level. As soon as the filling level measuring means 14' detects the upper filling level in the container 9', the extractor 10' is turned off. Discharging and filling of the lower intermediate storage container 3' and of the storage container 9' is carried out during operation in the described manner.
In an alternative embodiment the closing of the slide 8' can be triggered by the filling level in the lower intermediate container 3'.
A further inventive embodiment is the subject of independent claim 6.
In contrast to the apparatus described on the basis of Fig. 1 and 2, the apparatus according to the invention shows the advantage that the overall height of the filling apparatus is reduced by approximately 1/3 and that the control of the apparatus is considerably simplified.
INLET OPENING OF A PROCESSING MACHINE
BACKGROUND OF THE INVENTION
Field of the Invention This invention refers to a method for feeding pourable material, preferably granulated material, into an inlet opening of a processing machine, preferably an extruder for synthetic material, with a storage container provided with a conveying means for the filling thereof and with a closable outlet opening at the bottom, and with an intermediate storage container supported on a weighing means or provided with a filling level measuring means, said intermediate storage container being filled with material in correspondence with its filling weight or the filling level and provided with a bottom-side outlet opening leading into the inlet opening.
Description of Prior Art The correct and troublefree functioning of machines processing pourable material often depends on said material being supplied uniformly, i.e. under a substantially constant pressure. In principle, an extruder for synthetic material only then works satisfactorily, when the granulated synthetic materials and, if necessary, materials added thereto are fed to the extruder at a constant rate. This can for instance be ensured by the fact that in the feeding hopper or in an intermediate storage container corresponding to the feeding hopper or substituting it, a sufficient amount of material is constantly maintained which ensures a continuous feeding of the material into the extruder.
On the basis of Fig. 1 and 2 of the drawings, a known method as well as a known apparatus will be described in the 2051~39 following, by means of which granulated material or any other pourable material can be fed to an extruder for synthetic material such that it can be uniformly drawn in. Above the inlet opening 2 of a part of an extruder 1 (only schematically shown) a lower intermediate storage container 3 being designed as a proportioning weigher is arranged in a hanging position. Said lower intermediate storage container 3 is carried by a supporting arm 4 which is connected to the machine frame in the shown manner and which has an extensometer 5. Above the lower intermediate storage container 3 designed as a proportioning weigher there is arranged a further funnel-shaped upper intermediate storage container 6 with the bottom outlet 7 thereof being provided with a slide closing means 8 by which the outlet 7 can be closed and opened. On the cover of said further upper intermediate storage container 6 there is arranged a storage container 9 the cover of which carries an extractor 10. The funnel-shaped outlet 11 of said storage container 9 can be closed by a pivotally supported flap 12 provided with a tension spring 13 acting upon said flap in closing direction.
In its upper part the storage container 9 is provided with a filling level measuring means 14 detecting the upper filling limit for the suctioned granulated material in the storage container 9. The granulated material 15 is supplied to the storage container 9 via a suction pipe 16.
In Fig. 1 there is shown the condition in which the extractor 10 is turned on and the flap 12 closed so that to the storage container 9 granulated material is supplied via the suction pipe 16 up to a filling level height predetermined by the filling level measuring means 14. When the granulated material reaches at the filling level measuring means 14, the extractor 10 is turned off by a switch operated by the filling level measuring means.
Z05(~39 When the storage container 9 has been filled with granulated material up to the height predetermined by the filling level measuring means 14 and when then the extractor is turned off, the flap 12 is pressed open by the weight of the granulated material stored in the storage container 9, since the closing spring 13 is designed to have approximately that strength as to being able to close the flap when there is no filling pressure or only a minor filling pressure exerted thereon.
During the filling of the storage container 9 the flap 12 is kept in its closing position due to the negative pressure existing in the storage container.
During the filling of the storage container 9 with granulated material, the slide 8 can be pulled open in dependency on the filling weight detected by the proportioning weigher so that the granulated material flows from the further intermediate storage container 6 into the lower storage container 3. The slide 8 is again brought into its closing position as soon as the proportioning weigher detects a sufficient filling amount in the lower intermediate storage container 3. The command for pulling the slide 8 open comes from a signal derived from the extensometer 5.
In Fig. 2 there is shown the condition in which the extractor 10 has been turned off after reaching the filling height detected by the filling level measuring means 14 and the storage container 9 is discharged into the upper intermediate storage container 6 by the fact that the flap 12 is pressed open due to the weight of the filling load. However, when the upper intermediate storage container 6 is filled in the manner according to Fig. 2, the flap 12 can no longer be closed since it is blocked by the material piled up in the _ 4 _ 20S~39 upper intermediate storage container. The closing spring 13 can only then move the flap 12 again in its closing position when the upper intermediate storage container 6 has been dis-charged into the lower intermediate container 3 after pulling the slide 8 open so that the flap 12 is no longer blocked by the piled up material.
In the known apparatus described on the basis of Fig. 1 and 2, the extractor 10 is always turned on when the flap 12 is closed. The filling of the storage container 9 is then terminated by turning off the extractor 10, when the filling level has reached the level of the filling level measuring means 14. Independent of the control of the filling of the storage container 9, the opening movement and closing movement of the slide 8 is controlled by the proportioning weigher or the extensometer S such that the slide 8 is opened when a lower filling level is reached and closed again when an upper filling level is detected due to the corresponding weight.
The apparatus explained on the basis of Fig. 1 and 2 does not only have a considerable overall height due to the arrangement of the three containers one on top of the other, but due to the two control means being operated independently of each other for filling and discharging the three containers it is also of a relatively high technical expenditure.
Summary of the Invention Therefore it is the ob~ect of the invention to provide a method and an apparatus which enable a storage container arrangement of a lower overall height and with a simpler con-trol.
20S~39 According to the invention this problem is solved for a method of the kind mentioned hereinbefore in that the storage container is discharged completely or partially in dependency on the filling ratio of the intermediate storage container thereinto by opening of its outlet opening, and after closing the outlet opening, the storage container is again filled up with granulated material with a predetermined filling ratio.
The method according to the invention enables the constant supply of material to a processing machine with only one storage container and one intermediate container, the closing means of the storage container and the conveying means filling it only being controlled in dependency on the filling weight or the filling ratio of the lower intermediate storage container. In addition, the conveying means filling the upper storage container are controlled by its upper filling level, which provides an upper threshold for stopping the converging means. Thus, the apparatus operating according to the inventive method consists of only two containers and one control means controlling the filling as well as the opening action for discharging and the closing of the upper storage container.
The filling ratio of the intermediate storage container is the filling weight relating to the upper and lower thresholds. When the weight reaches the lower threshold, the gate is opened when the filling weight reaches the upper threshold, the gate is closed.
An apparatus for carrying out the method according to the invention is characterized according to the invention in that the closing means of the outlet opening are provided with a switch means turning on the conveying means during or after the closing of the outlet opening, and that the weighing or filling level measuring means generates a signal after .
205~3139 reaching the predetermined filling ratio, said signal turning off the conveying means.
The conveying means filling the storage container with material can be a suction conveying means.
Advantageously, a conveying pipe leads into the upper portion of the portion of the storage container, the storage container being closed by a cover provided with an extractor fan.
In an alternative embodiment, the filling levels may be used to trigger opening and closing of the gate, but the filling weight is preferred.
The intermediate storage container can be carried by a supporting arm connected with the machine frame, which can be provided with at least one extensometer for the detection of the filling weight. Thus the intermediate storage container has the function of a proportioning weigher, the closing means of the storage container being opened and closed in correspondence with the filling weight by signals generated by the proportioning weigher.
one embodiment of the invention will now be described in the following with reference to Fig. 3 of the drawing.
Detailed DescriPtion of Preferred Embodiment The structure and the mounting of the lower intermediate container 3' correspond to the structure and the mounting of the lower intermediate container 3 according to Fig. 1 and 2.
The lower intermediate container 3' has a funnel-like form in its lower section and is provided with an outlet leading into 2(~50139 the inlet opening 2' of the extruder 1'. The lower intermediate container 3' is connected with the machine frame by a supporting arm 4' provided with at least one extensometer 5', so that it shows the function of a proportioning weigher.
Above the lower intermediate container 3' there is arranged an upper storage container 9' of greater volume than the lower intermediate container 3' and with its lower outlet 7' being closable by a slide or gate 8'. Into the upper section of the storage container 9' there leads a conveying pipe designed as a suction pipe 16'. The cover of the storage container 9' is provided with an extractor lo' by the operation of which granulated material can be suctioned in through the suction pipe 16'. The storage container 9' is provided with a filling level measuring means 14' which detects the maximum admissible filling level height in the storage container 9'.
In the operating state as shown in Fig. 3, the slide 8' is opened so that granulated material can flow into the lower intermediate container 3' constituting a proportioning weigher. By opening the slide 8' there is simultaneously produced a signal which prevents the extractor 10' from being turned on. The slide 8' is closed as soon as a signal derived from the extensometer 5' indicates that in the lower ^~
intermediate storage container 3' there is a sufficient weight of material or that the filling ratio of the lower intermediate storage container 3' is not increasing. On closing the slide 8' there is directly produced a signal which turns on the extractor 10'. The extractor 10' remains turned on until by the suction pipe 16' such an amount of granulated material has been suctioned into the intermediate storage container 9' that the filling level measuring means -8- ~05~39 14' is activated by the increasing filling level. As soon as the filling level measuring means 14' detects the upper filling level in the container 9', the extractor 10' is turned off. Discharging and filling of the lower intermediate storage container 3' and of the storage container 9' is carried out during operation in the described manner.
In an alternative embodiment the closing of the slide 8' can be triggered by the filling level in the lower intermediate container 3'.
A further inventive embodiment is the subject of independent claim 6.
In contrast to the apparatus described on the basis of Fig. 1 and 2, the apparatus according to the invention shows the advantage that the overall height of the filling apparatus is reduced by approximately 1/3 and that the control of the apparatus is considerably simplified.
Claims (6)
1. Method for feeding pourable material, preferably granulated material, into an inlet opening of a processing machine, preferably an extruder for synthetic material, having an upper storage container provided with a conveying means for the filling thereof and with a closable outlet opening at the bottom, and a lower intermediate storage container supported on a weighing means or provided with a filling level measuring means, said lower intermediate storage container being filled with material in correspondence with its filling weight or the filling level and provided with a bottomside outlet opening leading into the inlet opening, wherein the upper storage container is discharged completely or partially in dependency on the filling ratio of the lower intermediate storage container thereinto by opening of its outlet opening and after closing the outlet opening the storage container is again filled up with granulated material with a predeterminable filling ratio.
2. Apparatus for carrying out the method according to claim 1, wherein the closing means (8') of the outlet opening (7') of the upper storage container (9') are provided with a switch means turning on the conveying means (10', 16') during or after the closing of the outlet opening (7'), and wherein the weighing or filling level measuring means (5') generates a signal after reaching the predetermined filling ratio, said signal turning off the conveying means.
3. Apparatus according to claim 2, wherein the conveying means is a suction conveying means (10', 16').
4. Apparatus according to claim 2 or 3, wherein a conveying pipe (16') leads into the upper portion of the upper storage container (9'), the upper storage container (9') being closed by a cover provided with an extractor fan (10').
5. Apparatus according to any one of claims 2 through 4, wherein the lower intermediate storage container (3') is carried by a supporting arm (4') connected to the machine frame, which is provided with at least one extensometer (5') for the detection of the filling weight.
6. Apparatus for carrying out the method according to claim 1, comprising an upper storage container (9') which is provided with a suction conveying means (10') for the filling of the storage container (9') and with a closable, bottomside outlet opening (7').
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4027319A DE4027319A1 (en) | 1990-08-29 | 1990-08-29 | METHOD AND DEVICE FOR FEEDING GIANT CAPABILITY IN A INLET OPENING OF A PROCESSING MACHINE |
| DEP4027319.9 | 1990-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2050139A1 true CA2050139A1 (en) | 1992-03-01 |
Family
ID=6413158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002050139A Abandoned CA2050139A1 (en) | 1990-08-29 | 1991-08-28 | Method and apparatus for feeding pourable material into an inlet opening of a processing machine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0472924A3 (en) |
| CA (1) | CA2050139A1 (en) |
| DE (1) | DE4027319A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105922509A (en) * | 2016-06-07 | 2016-09-07 | 联塑科技发展(武汉)有限公司 | Online pelleting material weighing device |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5450984A (en) * | 1994-04-29 | 1995-09-19 | K-Tron Technologies, Inc. | Material feeding apparatus |
| DE19736979C1 (en) * | 1997-08-25 | 1999-04-08 | Windmoeller & Hoelscher | Process for feeding plastic granulate into the inlet opening of a plastic extruder |
| IE980079A1 (en) * | 1998-02-06 | 1999-08-11 | Athlone Extrusions Dev Ltd | Production of Plastics Sheet Material |
| AT500330B1 (en) * | 2001-10-24 | 2006-11-15 | Mann & Hummel Protec Gmbh | HANDLING EQUIPMENT |
| US8067318B2 (en) * | 2002-04-15 | 2011-11-29 | Invista North America S.A.R.L. | Elastic nonwoven sheet |
| DE102016119596A1 (en) | 2016-10-14 | 2018-04-19 | Plast-Control Gmbh | Method for filling a weighing container for plastic granules |
| CN110525742B (en) * | 2019-08-28 | 2021-08-27 | 上海卫岚电子科技股份有限公司 | Method for realizing multi-channel efficient continuous counting and subpackaging |
| CN113321168B (en) * | 2021-06-01 | 2021-12-21 | 江苏森沃包装有限公司 | Dosing unit is used in canned fruit production |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3036335A (en) * | 1959-06-11 | 1962-05-29 | Nat Rubber Machinery Co | Apparatus and method for extruding thermoplastic material |
| FR2154893A5 (en) * | 1971-09-29 | 1973-05-18 | Bonnet Robert | Automated hopper loading system - using a pneumatic venturi conveyor to maintain a constant head in a secondary hopper |
| JPS5872013A (en) * | 1981-10-27 | 1983-04-28 | Ee & D:Kk | Weighing device for raw material provided with prediction control function |
| FR2572520A1 (en) * | 1984-10-31 | 1986-05-02 | Cellier Sa | Installation for continuous metering by weighing by weight loss of a loose product |
| DE3617200A1 (en) * | 1986-05-22 | 1987-11-26 | Inoex Gmbh | SCALE FOR MEASURING THE FLOW RATE IN THE INLET OF AN EXTRUDER |
| DE3914925C3 (en) * | 1988-05-06 | 1996-02-15 | Karl Veit Holger Prof Dr Ing P | Flow meter |
| JPH02107426A (en) * | 1988-10-17 | 1990-04-19 | Shikoku Maruyasu Kk | Method and apparatus for supply of material to molding machine |
-
1990
- 1990-08-29 DE DE4027319A patent/DE4027319A1/en not_active Withdrawn
-
1991
- 1991-07-26 EP EP19910112615 patent/EP0472924A3/en not_active Withdrawn
- 1991-08-28 CA CA002050139A patent/CA2050139A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105922509A (en) * | 2016-06-07 | 2016-09-07 | 联塑科技发展(武汉)有限公司 | Online pelleting material weighing device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0472924A2 (en) | 1992-03-04 |
| EP0472924A3 (en) | 1992-09-09 |
| DE4027319A1 (en) | 1992-03-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |