US3245110A - Plasticizing rolling mills for synthetic substances - Google Patents

Plasticizing rolling mills for synthetic substances Download PDF

Info

Publication number
US3245110A
US3245110A US238198A US23819862A US3245110A US 3245110 A US3245110 A US 3245110A US 238198 A US238198 A US 238198A US 23819862 A US23819862 A US 23819862A US 3245110 A US3245110 A US 3245110A
Authority
US
United States
Prior art keywords
wall
drum
plasticizing
rolling mill
substances
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.)
Expired - Lifetime
Application number
US238198A
Inventor
Daubenfeld Jean Joseph Gerard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3245110A publication Critical patent/US3245110A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/50—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with rotary casing
    • 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
    • B29C48/361—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die with the barrel or with a part thereof rotating
    • 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
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • 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

Definitions

  • the known method for working the PVC plastic in rolling mills is unsatisfactory for at least two reasons: it is relatively expensive, entailing high costs for wages; and it is not suitable for producing large quantities of material in a given period of time.
  • the object of the invention is to devise a continuous and uniformly operating plasticizing rolling mill which can work large and small quantities of material in a given period of time and with which mill it is possible to obtain any desired degree of plasticization. With heretofore known machines it has not been possible to obtain such a. variety of plasticization of material being worked.
  • the plasticizing rolling mill comprises essentially a heatable drum rotatable about its axis and at least one roll also rotatable about its axis, extending parallel to the axis of the drum, and cooperating with the inner wall of the drum.
  • a gap or space separates the drum inner wall from the roll or rollers.
  • Relative movement between the inner wall of the drum and the periphery of the roll or rolls can be regulated as desired within certain limits.
  • the number of revolutions of the drum and of the roll or rolls can be infinitely regulated independently of one another. As a result it is possible to adjust the plasticizing effect as desired.
  • theroll or rolls can rotate in either direction in relation to the drum and to each other.
  • the roll or rolls may be provided with a shallow screwthread which may be right or left-handed and exerts a feeding elfect on the plasticized skin of synthetic substance forming on the inner wall of the drum.
  • a scraper may be provided for detaching the skin of synthetic substance trom the wall of the drum and guiding it into the space between the pair of rolls.
  • the scraper is preferably pivotable about an axis parallel to the axis of the rolling mill. In this manner the skin of synthetic substance can be completely or partly scraped off the inner wall of the drum and conducted between the rolls by the blades of the scraper for further working of the material.
  • the rolling mill may also be combined with a screw press connected up in series so that the plasticized synthetic material is fed from the rolling mill into the screw press.
  • FIG. 1 is a longitudinal section of a plasticizing rolling mill followed by a screw press
  • FIG. 2 is a section through the plasticizing rolling mill taken on line 11-11 of FIG. 1.
  • the plasticizing rolling mill illustrated in the drawing consists of a rotary and heatable drum 1 and two heatable rolls 2 arranged side by side axially parallel to the drum and in the interior thereof, which rolls are rotatable about their axes.
  • the drum is driven by means which include a worm wheel 4 fixed on the drum and engaged by a driven worm 5..
  • the drive of the rolls 2 is not shown.
  • the rolls 2 are mounted in a support which is only indicated in the drawing and which can be adjusted so that a space remains between the periphery of the rolls and the inner wall of the drum.
  • the adjustability of the support can also be extended to the space between the two rolls.
  • the rolls are provided with shallow square screw-threads. They leave a space between their facing peripheries.
  • the screw-threads of the rolls can interengage slightly.
  • a scraper 3 is arranged between the two neighbouring rolls 2 and the inner wall of the drum 1.
  • This scraper is of a length corresponding to that of the operating inner wall of the drum. Its purpose is to scrape off the skin of plasticized synthetic material forming on the inner Wall of the drum. With it the skin can be completely or partly peeled off the inner wall of the drum.
  • the scraper is pivotally mounted on a shaft 6 extending parallel to the axis of the drum. The scraper is so shaped that it conducts the peeled off skin into the space between the two rolls 2.
  • the directions of rotation of the drum land of the rolls 2 are indicated 'by the arrows 7 and 8 respectively. It is evident that these directions can be changed. Thus, for example, the rolls 2 can rotate in the opposite direction to the drum. The two rolls 2 can also rotate in directions opposite to each other.
  • a single screw press 10 is coordinated to the plasticizing rolling mill.
  • This single or multiple screw press can follow the plasticizing rolling mill in horizontal direction or be arranged as shown, perpendicularly below the plasticizing rolling mill.
  • the number of revolutions of the screw press is adapted to the speed of feed and capacity of the plasticizing rolling mill and is infinitely adjustable for this purpose.
  • the arrow 11 indicates thedirection in which the material coming from the plasticizing rolling mill drops into the hopper 12 of the screw press.
  • the screw press can be coupled with the plasticizing rolling mill.
  • the screw press may be of relatively short length as compared with the conventional screw presses, the cylinders of which are about eight to thirty times as long as the diameter of the screw.
  • This construction is possible because in the arrangement according to the invention the screw press is not required to carry out kneading, mixing and plasticizing work but serves primarily for the constant and uniform feeding of the plastic mass. Because of this its construction can be simpler, the cylinder length shorter, and the screw diameter larger than in screw presses which serve primarily to knead and mix.
  • the rolling mill according to the invention can also be used for other goods, e.g., for chocolate and the like.
  • a rolling mill for plasticizing synthetic substances comprising a rotatable drum having an inner wall, at least one operating roller within the drum, the lengthwise axis of the roller lying parallel to the axis around which the drum rotates, said roller lying adjacent said inner wall and having an operative relation therewith for kneading and mixing said substances therebetween, the position of said roller relative to said inner Wall being adjustable, and a scraper lying adjacent the length of said inner wall for shaving said' substances off said inner wall and for redirecting said substances for further kneading, and mixing as they emerge from between said inner wall and said roller.
  • a rolling mill according to claim 1 wherein there are at least two operating rollers lying adjacent said inner wall having an operative relation with said wall and with each other for kneading and mixing said substances between said rollers and between each roller and saidinner Wall, the lengthwise axis of each of said rollers lying parallel to the axis around which the drum rotates, the position of said rollers relative to said inner wall being adjustable, whereby improved kneading and' mixing of said substances not only between said rollers and" said inner wall, but also between said rollers themselves, is achieved.
  • a rolling mill according to claim 2 wherein said operating rollers are provided with shallow screw threads which engage one another and serve toconvey said substances axially.
  • a rolling mill for plasticizing synthetic substances comprising a rolling mill according to claim 2 in combination With a mass-deforming worm type press for additional' working of said substances.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Description

April 1966 J. J. G. DAUBENFELD 3,245,110
PLASTICIZING ROLLING- MILLS FOR SYNTHETIC SUBSTANCES Filed Nov. 16, 1962 //V l/E/V 7 0/ e m/d Daub enfe/d 6 W m J n w J By/ws affomeys MA M M United States Patent 3,245,110 PLASTICIZING ROLLING MILLS FOR SYNTHETIC SUBSTANCES Jean Joseph Grard Daubenfeld, 12 Rue Astrid, Luxembourg, Luxembourg Filed Nov. 16, 1962, Ser. No. 238,198 Claims priority, application Luxembourg, Nov. 25, 1961,
40,864 7 Claims. (Cl. 18-2) It is known that a very high quality material with uniform gelatinization can be obtained by working synthetic substances, such as PVC plastic, in rolling mills and that better finished products can be obtained from this material by thereafter working it in screw presses.
The known method for working the PVC plastic in rolling mills is unsatisfactory for at least two reasons: it is relatively expensive, entailing high costs for wages; and it is not suitable for producing large quantities of material in a given period of time.
The object of the invention is to devise a continuous and uniformly operating plasticizing rolling mill which can work large and small quantities of material in a given period of time and with which mill it is possible to obtain any desired degree of plasticization. With heretofore known machines it has not been possible to obtain such a. variety of plasticization of material being worked.
The plasticizing rolling mill according to the invention comprises essentially a heatable drum rotatable about its axis and at least one roll also rotatable about its axis, extending parallel to the axis of the drum, and cooperating with the inner wall of the drum. A gap or space separates the drum inner wall from the roll or rollers.
Appropriate, known feed and discharge means are associated with the rolling mill and its drum.
Relative movement between the inner wall of the drum and the periphery of the roll or rolls can be regulated as desired within certain limits. Thus the number of revolutions of the drum and of the roll or rolls can be infinitely regulated independently of one another. As a result it is possible to adjust the plasticizing effect as desired.
In addition, theroll or rolls can rotate in either direction in relation to the drum and to each other.
It is also advisable to provide means for displacing the roll or rolls which means allow the gap between the inner wall of the drum and the periphery of the roll or rolls to be adjusted and regulated.
l The roll or rolls may be provided with a shallow screwthread which may be right or left-handed and exerts a feeding elfect on the plasticized skin of synthetic substance forming on the inner wall of the drum.
If several rolls are provided they are separated one from another by a space or gap. In the case of rolls with screw-threads, these screw-threads can interengage slightly.
It is likewise possible to provide screw-threads on the inner wall of the drum in order to effect a feeding of the skin of plasticized synthetic substance in the course of its formation.
Between neighbouring rolls arranged in pairs and the inner wall of the drum, a scraper may be provided for detaching the skin of synthetic substance trom the wall of the drum and guiding it into the space between the pair of rolls.
The scraper is preferably pivotable about an axis parallel to the axis of the rolling mill. In this manner the skin of synthetic substance can be completely or partly scraped off the inner wall of the drum and conducted between the rolls by the blades of the scraper for further working of the material.
The rolling mill may also be combined with a screw press connected up in series so that the plasticized synthetic material is fed from the rolling mill into the screw press.
An embodiment of the invention is illustrated diagrammetically by way of example in the accompanying drawing, in which:
FIG. 1 is a longitudinal section of a plasticizing rolling mill followed by a screw press, and
FIG. 2 is a section through the plasticizing rolling mill taken on line 11-11 of FIG. 1.
The plasticizing rolling mill illustrated in the drawing consists of a rotary and heatable drum 1 and two heatable rolls 2 arranged side by side axially parallel to the drum and in the interior thereof, which rolls are rotatable about their axes.
The drum is driven by means which include a worm wheel 4 fixed on the drum and engaged by a driven worm 5.. The drive of the rolls 2 is not shown.
The rolls 2 are mounted in a support which is only indicated in the drawing and which can be adjusted so that a space remains between the periphery of the rolls and the inner wall of the drum. The adjustability of the support can also be extended to the space between the two rolls.
In the embodiment illustrated, the rolls are provided with shallow square screw-threads. They leave a space between their facing peripheries.
The screw-threads of the rolls can interengage slightly.
Between the two neighbouring rolls 2 and the inner wall of the drum 1, a scraper 3 is arranged. This scraper is of a length corresponding to that of the operating inner wall of the drum. Its purpose is to scrape off the skin of plasticized synthetic material forming on the inner Wall of the drum. With it the skin can be completely or partly peeled off the inner wall of the drum. For the purpose of adjustment, the scraper is pivotally mounted on a shaft 6 extending parallel to the axis of the drum. The scraper is so shaped that it conducts the peeled off skin into the space between the two rolls 2.
The directions of rotation of the drum land of the rolls 2 are indicated 'by the arrows 7 and 8 respectively. It is evident that these directions can be changed. Thus, for example, the rolls 2 can rotate in the opposite direction to the drum. The two rolls 2 can also rotate in directions opposite to each other.
The direction in which the synthetic substance being worked travels is indicated by the arrow 9.
In the embodiment illustrated in the drawing, a single screw press 10 is coordinated to the plasticizing rolling mill. This single or multiple screw press can follow the plasticizing rolling mill in horizontal direction or be arranged as shown, perpendicularly below the plasticizing rolling mill. The number of revolutions of the screw press is adapted to the speed of feed and capacity of the plasticizing rolling mill and is infinitely adjustable for this purpose. The arrow 11 indicates thedirection in which the material coming from the plasticizing rolling mill drops into the hopper 12 of the screw press. The screw press can be coupled with the plasticizing rolling mill.
In the case of the arrangement according to the invention, the screw press may be of relatively short length as compared with the conventional screw presses, the cylinders of which are about eight to thirty times as long as the diameter of the screw. This construction is possible because in the arrangement according to the invention the screw press is not required to carry out kneading, mixing and plasticizing work but serves primarily for the constant and uniform feeding of the plastic mass. Because of this its construction can be simpler, the cylinder length shorter, and the screw diameter larger than in screw presses which serve primarily to knead and mix.
The rolling mill according to the invention can also be used for other goods, e.g., for chocolate and the like.
I claim:
1. A rolling mill for plasticizing synthetic substances comprising a rotatable drum having an inner wall, at least one operating roller within the drum, the lengthwise axis of the roller lying parallel to the axis around which the drum rotates, said roller lying adjacent said inner wall and having an operative relation therewith for kneading and mixing said substances therebetween, the position of said roller relative to said inner Wall being adjustable, and a scraper lying adjacent the length of said inner wall for shaving said' substances off said inner wall and for redirecting said substances for further kneading, and mixing as they emerge from between said inner wall and said roller.
2. A rolling mill according to claim 1 wherein there are at least two operating rollers lying adjacent said inner wall having an operative relation with said wall and with each other for kneading and mixing said substances between said rollers and between each roller and saidinner Wall, the lengthwise axis of each of said rollers lying parallel to the axis around which the drum rotates, the position of said rollers relative to said inner wall being adjustable, whereby improved kneading and' mixing of said substances not only between said rollers and" said inner wall, but also between said rollers themselves, is achieved.
3. A rolling mill according to claim 2, wherein said scraper is positioned between said inner wall and said operating rollers.
4. A rolling mill according to claim 2, wherein said scraper is pivo'table around an axis parallel to the axis around which the drum rotates.
5. A rolling mill according to claim 2, wherein said operating rollers are provided with shallow screw threads which engage one another and serve toconvey said substances axially.
6. A rolling mill according to claim 5, wherein said drum is heatable and is provided with screw threads at its inner wall for cooperation with the threads on said rollers.
7. A rolling mill for plasticizing synthetic substances comprising a rolling mill according to claim 2 in combination With a mass-deforming worm type press for additional' working of said substances.
References Cited by the Examiner UNITED STATES PATENTS 1,141,898 6/1915 Merritt.
1,344,541 6/ 1920 Lacroix et al l8-2 2,200,997 5/1940 Royle l8-2 X 2,686,336 8/1954 Kleinlein et al. l8-2X I. SPENCER OVERHOLSER, Primary Examiner.
MICHAEL V. BRINDISI', WILLIAM J. STEPHENSON,
Examiners.

Claims (1)

1. A ROLLING MILL FOR PLASTICIZING SYNTHETIC SUBSTANCES COMPRISING A ROTATABLE DRUM HAVING AN INNER WALL, AT LEAST ONE OPERATING ROLLER WITHIN THE DRUM, THE LENGTHWISE AXIS OF THE ROLLER LYING PARALLEL TO THE AXIS AROUND WHICH THE DRUM ROTATES, SAID ROLLER LYING ADJACENT SAID INNER WALL AND HAVING AN OPERATIVE RELATION THEREWITH FOR KNEADING AND MIXING SAID SUBSTANCES THEREBETWEEN, THE POSITION OF SAID ROLLER RELATIVE TO SAID INNER WALL BEING ADJUSTABLE, AND A SCRAPER LYING ADJACENT THE LENGTH OF SAID INNER WALL FOR SHAVING SAID SUBSTANCES OFF SAID INNER AND FOR REDIRECTING SAID SUBSTANCES FOR FURTHER KNEADING AND MIXING AS THEY EMERGE FROM BETWEEN SAID INNER WALL AND SAID ROLLER.
US238198A 1961-11-25 1962-11-16 Plasticizing rolling mills for synthetic substances Expired - Lifetime US3245110A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU40864 1961-11-25

Publications (1)

Publication Number Publication Date
US3245110A true US3245110A (en) 1966-04-12

Family

ID=19722776

Family Applications (1)

Application Number Title Priority Date Filing Date
US238198A Expired - Lifetime US3245110A (en) 1961-11-25 1962-11-16 Plasticizing rolling mills for synthetic substances

Country Status (5)

Country Link
US (1) US3245110A (en)
DE (1) DE1454778B1 (en)
FR (1) FR1339440A (en)
GB (1) GB976006A (en)
LU (1) LU40864A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4029459A (en) * 1974-02-01 1977-06-14 Gunther Papenmeier Kg, Mashinen-Und Apparatebau Method and apparatus for manufacture of granulates from pulverulent, granular, doughy or similar material
US4057225A (en) * 1976-07-14 1977-11-08 Esm Inc. Screw feeder for granular material
US20080135582A1 (en) * 2006-10-02 2008-06-12 Schmidt Norman G Device for controlled metering of semi solid food products
US20090321473A1 (en) * 2008-04-22 2009-12-31 Schmidt Norman G Semi-solid metering machines with opening access for cleaning
US8245885B2 (en) 2006-10-18 2012-08-21 Schmidt Norman G Device to allow for cleaning access in semi-solid metering machines
CN106757407A (en) * 2017-02-21 2017-05-31 无锡正佳自控系统股份有限公司 A kind of pair of Weightlessness balance

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3704108A1 (en) * 1987-02-11 1988-08-25 Albers August MIXING AND SCHERWALZWERK FOR PLASTIFIZABLE MATERIAL
DE10330223A1 (en) * 2003-07-04 2005-01-20 Coperion Werner & Pfleiderer Gmbh & Co.Kg Process and device for plasticizing thermoplastics

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1141898A (en) * 1909-10-16 1915-06-01 Beech Nut Packing Co Grinding-mill.
US1344541A (en) * 1919-11-08 1920-06-22 Kelly Springfield Tire Co Mixing-machine
US2200997A (en) * 1937-01-29 1940-05-14 Vernon E Royle Extruding machine
US2686336A (en) * 1950-05-28 1954-08-17 Leistritz Maschfabrik Paul Kneading pump

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE732309C (en) * 1937-04-24 1943-02-26 Ig Farbenindustrie Ag Kneading machine for plastic masses
GB608777A (en) * 1946-01-09 1948-09-21 Redfern S Rubber Works Ltd Improvements in and relating to the working of rubber and the like
US2696635A (en) * 1951-09-13 1954-12-14 Adamson United Company Continuous mixing mill for plastic materials
BE551763A (en) * 1961-05-15 1900-01-01

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1141898A (en) * 1909-10-16 1915-06-01 Beech Nut Packing Co Grinding-mill.
US1344541A (en) * 1919-11-08 1920-06-22 Kelly Springfield Tire Co Mixing-machine
US2200997A (en) * 1937-01-29 1940-05-14 Vernon E Royle Extruding machine
US2686336A (en) * 1950-05-28 1954-08-17 Leistritz Maschfabrik Paul Kneading pump

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4029459A (en) * 1974-02-01 1977-06-14 Gunther Papenmeier Kg, Mashinen-Und Apparatebau Method and apparatus for manufacture of granulates from pulverulent, granular, doughy or similar material
US4057225A (en) * 1976-07-14 1977-11-08 Esm Inc. Screw feeder for granular material
US20080135582A1 (en) * 2006-10-02 2008-06-12 Schmidt Norman G Device for controlled metering of semi solid food products
US8066154B2 (en) * 2006-10-02 2011-11-29 Norman Schmidt Device for controlled metering of semi solid food products
US8245885B2 (en) 2006-10-18 2012-08-21 Schmidt Norman G Device to allow for cleaning access in semi-solid metering machines
US20090321473A1 (en) * 2008-04-22 2009-12-31 Schmidt Norman G Semi-solid metering machines with opening access for cleaning
US8167167B2 (en) 2008-04-22 2012-05-01 Schmidt Norman G Semi-solid metering machines with opening access for cleaning
CN106757407A (en) * 2017-02-21 2017-05-31 无锡正佳自控系统股份有限公司 A kind of pair of Weightlessness balance

Also Published As

Publication number Publication date
FR1339440A (en) 1963-10-04
LU40864A1 (en) 1962-11-26
GB976006A (en) 1964-11-25
DE1454778B1 (en) 1970-12-03

Similar Documents

Publication Publication Date Title
US4029459A (en) Method and apparatus for manufacture of granulates from pulverulent, granular, doughy or similar material
US4416543A (en) Apparatus for treating powdery rubber mixtures
EP0612559B1 (en) Extrusions machine
CA1304942C (en) Process for the preparation of propellant charge powder
DE69303925T2 (en) Mixing machine of the "Transfermix" type
WO2002030652A1 (en) Multi-screw extruder and method for treating and/or processing elastomers with added filler
DE2614730C2 (en) Device for the continuous agglomeration of thermoplastic plastic waste, in particular plastic films
US3245110A (en) Plasticizing rolling mills for synthetic substances
DE3021739A1 (en) METHOD AND DOUBLE SCREW EXTRUDER FOR PROCESSING FOOD AND FEED
US1990555A (en) Apparatus for mixing and kneading plastic materials
EP0148966B1 (en) Continuous mixing and shear rollers
US3548742A (en) Apparatus for continuously processing pulverulent or granular feeds
US3730663A (en) Pelletizer
US5399080A (en) Pellet press
JPH0448491B2 (en)
US4929086A (en) Continuous rate feed hopper
US4038010A (en) Apparatus for production of granulated and pulverized particles from pasty or similar material
DE19534239A1 (en) Prepn. of thermosetting plastic from mixt. produced in planetary roll extruder
US2976565A (en) Mixing apparatus and method
US3296982A (en) Continuous mixing and developing machine
GB1380797A (en) Machine for pelletization of pastelike materials
US2754068A (en) Roll mill for grinding liquid and pasty material
DE2260565B2 (en) Method and device for mixing plastic or rubber in a two-roller mixing mill
DE19819349A1 (en) Plastic film production and/or film coating
DE1504015A1 (en) Process for the production of homogeneous calender films