CA1090970A - Compaction of pulverised rubber mixtures - Google Patents
Compaction of pulverised rubber mixturesInfo
- Publication number
- CA1090970A CA1090970A CA276,068A CA276068A CA1090970A CA 1090970 A CA1090970 A CA 1090970A CA 276068 A CA276068 A CA 276068A CA 1090970 A CA1090970 A CA 1090970A
- Authority
- CA
- Canada
- Prior art keywords
- rubber
- mixture
- compaction
- pulverised
- density
- 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
Links
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
- B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
- B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
- B29B7/421—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with screw and additionally other mixing elements on the same shaft, e.g. paddles, discs, bearings, rotor blades of the Banbury type
-
- 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
- B29B13/00—Conditioning or physical treatment of the material to be shaped
-
- 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
- B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
- B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
- B29B7/425—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with screw surrounded by a casing provided with grooves or cavities
-
- 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
-
- 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
- B29C48/68—Barrels or cylinders
-
- 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
- B29C48/03—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
- B29C48/04—Particle-shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2021/00—Use of unspecified rubbers as moulding material
Abstract
COMPACTION OF PULVERISED RUBBER MIXTURES
Abstract of the Disclosure Compacting of a rubber mixture by forcing a vulcanisable mixture of rubber and additives required for its manufacture through a diminishing cross-section. The mixture includes a vulcanising medium and is in the form of a pourable powder having a particle size of 0.1 to 6 mm with a powder density of 0.4 to 0.8 g/cm3. Compacting is at a temperature of 0 to 60°C, so that a granular, compact, yet not completely homogeneous, mixture of a density of 1.1 to 1.4 g/cm3 is produced. A device for compacting is also shown.
Abstract of the Disclosure Compacting of a rubber mixture by forcing a vulcanisable mixture of rubber and additives required for its manufacture through a diminishing cross-section. The mixture includes a vulcanising medium and is in the form of a pourable powder having a particle size of 0.1 to 6 mm with a powder density of 0.4 to 0.8 g/cm3. Compacting is at a temperature of 0 to 60°C, so that a granular, compact, yet not completely homogeneous, mixture of a density of 1.1 to 1.4 g/cm3 is produced. A device for compacting is also shown.
Description
1(~90.~3 7(~
The present invention relates to a method for the compaction of a powder form vulcanisable rubber mixture.
The term rubber mixture usually means a mixture of a vulcanisable rubber and the additives required for processing it, such as fillers, w lcanis-ing medium, stabilisers.
For some time now such rubber mixtures have been available in the form of pourable powders, whereas previously the manufacturer of rubber articles had to produce them on the spot by expensive mixing processes.
Rubber mixtures in the form of pourable powders thus contain all the constituents required for making rubber articles. They can be processed without the addition of further substances. Pulverised rubber mixtures gener-ally consist of particles with diameters of 0.1 to 6 mm. As rubber they pre-ferably contain natural rubber, diene rubbers such as polybutadiene, poly-isoprene, butadiene/styrene-copolymer, butadiene/alkylacrylate-copolymer, butadiene/acrylonitrile-copolymer (nitrile rubber) and polychloroprene or ethylene-propylene-diene rubbers (EPDM rubbers; the diene is generally not conjugated). Mixes of specific rubbers with thermoplastics are equally suit-able, insofar as the mixes still have the characteristics of rubber (e.g.
mixes of polyvinylchloride and butadiene/acrylonitrile-copolymers).
The mixtures contain solid and, if necessary, liquid additives.
Solid additives include for example (figures in brackets are parts by weight per 100 parts by weight rubber) carbon black (2-200), light fillers such as chalk, silicate (5-2000), vulcanising media (1-10) and vulcanising aids ~sulphur, zinc oxide, accelerator), anti-ageing media, ozone protecting media, resinous substances and processing aids.
Liquid additives include in particular softening oils and stretch-ing oils (5-170) and resinous substances (5-20), e.g. phenolic resins, which are usually added dissolved in oil.
These types of rubber mixtures in powder form are easily transported 3Q and metered on account of their pourability. Their powder density is usually lt~O.13 70 0.4 to 0.8 g/cm3.
Por processing, i.e. for manufacturing moulded bodies and subsequent w lcanisation, the pulverised mixtures must be compacted so that they can be fed into the normal rubber processing machines. lt is impossible to make a homogeneous, for example extruded, moulded body directly from the pulverised rubber mixture but a granular but compact intermediate condition must be ob-tained first. The object of the invention is to produce this granular, com-pact, not completely homogeneous condition, without loss in the quality of the rubber, in particular without vulcanisation.
According to the invention there is provided a method for the com-paction of a w lcanisable rubber mixture consisting of rubber and additives including a vulcanising medium in the form of a pourable powder having a particle si~e of from 0.1 to 6 mm and a density of from 0.4 to 0.8 g/cm3, wherein the mixture is passed through a continuously decreasing cross-section at a temperature of from 0 to 60~C, whereby a granular, compact, yet not com-pletely homogeneous mixture having a density of from 1.1 to 1.4 g/cm3 is pro-duced.
During this procedure a part of the air contained in the uncompacted pouring is removed from the pourable powder and vented. Depending on the ini-tial powder density of the mixture, compacting ratios of around 1:1.5 to 1:3 can be required. As there are usually large amounts of powder to be treated, the process is preferably carried out continuously.
A suitable device for carrying out the method of the invention com-prises a screw extruder having first and second cylindrical portions connected by a frusto-conical portion, wherein the pitch of the screw is constant, the ratio of the inside diameters of the first and second cylindrical portion is from 2.5:1 to 1.5:1 and the taper of the frusto-conical portion is from 10 to 35C.
The device is further illustrated in Figures 1 to 3. Figure 1 is 3Q a section through the device, Figures 2 and 3 show details of construction.
~V'~0.~70 The numerals illustrate t2) suspension arrangement, ~3) funnel-shaped stor-age tank, (111 rotational axis, ~12) axle arm (13) driving pulley, (14) bear-ing, ~15) ring nun, ~7) impeller, (16) cy~lindrical screw zone ~I), (16 a) conical zone, ~17) cylindrlcal screw zone (II).
A support 11 is suspended from the traverse member 2. The support 11 is driven at its upper free end 12 by a drive wheel 13. Below the bearing 14, the support 11 is axially displaceable by means of a threaded ring 15.
In addition, the support 11 is provided, before the beginning of the screw zone 16, with staggered stirrer blades or vanes 7 which are mounted for dis-placement perpendicularly of the axis of the support and for rotation about their own axis. Below the stirrer blade or vane 7 the support 11 continues in the form of a screw in such a way tkat a cylindrical-conical section 16, 16a is followed by another cylindrical section 17. It is also possible to use a purely conical section instead of a cylindrical-conical section 16, 16a.
The housing is provided on its inside, in the vicinity of the conical section 16a with fillets 18 ~see Figures 2 and 3) which extend at an angle to the generatrices of the conical section of the housing.
The upper part of the device serves as a feeding device for the pul-verised mixture. It is essentially a funnel with impellers, in the vertical arrangement of the device as shown. Of course the device can also be horizon-tally arr~nged. In this case the filling device is a funnel which rests laterally on the screw. In the funnel conveying means can be arranged to prevent channelling. The essential elements of the device are (16), (16a) and ~17). Requirements here are a uniform pitch and depth of the screw over its whole length, a ratio of the diameter of the cylindrical screw zone (I) to cylindrical screw zone ~II) from 2.5:1 to 1.5:1, an angle of taper of the conical screw zone from 10 to 35, and a length ratio of the cylindrical zone ~rl to the cylindrical zone (II) of 0.5:1 to 2:1. The inner wall of the screw housing can contain ridges for improving conveyance and output, as represented in Figures 2 and 3 ~reference number 18). It is also possible to provide separate cooling and heating devices for the different screw sections.
The present invention relates to a method for the compaction of a powder form vulcanisable rubber mixture.
The term rubber mixture usually means a mixture of a vulcanisable rubber and the additives required for processing it, such as fillers, w lcanis-ing medium, stabilisers.
For some time now such rubber mixtures have been available in the form of pourable powders, whereas previously the manufacturer of rubber articles had to produce them on the spot by expensive mixing processes.
Rubber mixtures in the form of pourable powders thus contain all the constituents required for making rubber articles. They can be processed without the addition of further substances. Pulverised rubber mixtures gener-ally consist of particles with diameters of 0.1 to 6 mm. As rubber they pre-ferably contain natural rubber, diene rubbers such as polybutadiene, poly-isoprene, butadiene/styrene-copolymer, butadiene/alkylacrylate-copolymer, butadiene/acrylonitrile-copolymer (nitrile rubber) and polychloroprene or ethylene-propylene-diene rubbers (EPDM rubbers; the diene is generally not conjugated). Mixes of specific rubbers with thermoplastics are equally suit-able, insofar as the mixes still have the characteristics of rubber (e.g.
mixes of polyvinylchloride and butadiene/acrylonitrile-copolymers).
The mixtures contain solid and, if necessary, liquid additives.
Solid additives include for example (figures in brackets are parts by weight per 100 parts by weight rubber) carbon black (2-200), light fillers such as chalk, silicate (5-2000), vulcanising media (1-10) and vulcanising aids ~sulphur, zinc oxide, accelerator), anti-ageing media, ozone protecting media, resinous substances and processing aids.
Liquid additives include in particular softening oils and stretch-ing oils (5-170) and resinous substances (5-20), e.g. phenolic resins, which are usually added dissolved in oil.
These types of rubber mixtures in powder form are easily transported 3Q and metered on account of their pourability. Their powder density is usually lt~O.13 70 0.4 to 0.8 g/cm3.
Por processing, i.e. for manufacturing moulded bodies and subsequent w lcanisation, the pulverised mixtures must be compacted so that they can be fed into the normal rubber processing machines. lt is impossible to make a homogeneous, for example extruded, moulded body directly from the pulverised rubber mixture but a granular but compact intermediate condition must be ob-tained first. The object of the invention is to produce this granular, com-pact, not completely homogeneous condition, without loss in the quality of the rubber, in particular without vulcanisation.
According to the invention there is provided a method for the com-paction of a w lcanisable rubber mixture consisting of rubber and additives including a vulcanising medium in the form of a pourable powder having a particle si~e of from 0.1 to 6 mm and a density of from 0.4 to 0.8 g/cm3, wherein the mixture is passed through a continuously decreasing cross-section at a temperature of from 0 to 60~C, whereby a granular, compact, yet not com-pletely homogeneous mixture having a density of from 1.1 to 1.4 g/cm3 is pro-duced.
During this procedure a part of the air contained in the uncompacted pouring is removed from the pourable powder and vented. Depending on the ini-tial powder density of the mixture, compacting ratios of around 1:1.5 to 1:3 can be required. As there are usually large amounts of powder to be treated, the process is preferably carried out continuously.
A suitable device for carrying out the method of the invention com-prises a screw extruder having first and second cylindrical portions connected by a frusto-conical portion, wherein the pitch of the screw is constant, the ratio of the inside diameters of the first and second cylindrical portion is from 2.5:1 to 1.5:1 and the taper of the frusto-conical portion is from 10 to 35C.
The device is further illustrated in Figures 1 to 3. Figure 1 is 3Q a section through the device, Figures 2 and 3 show details of construction.
~V'~0.~70 The numerals illustrate t2) suspension arrangement, ~3) funnel-shaped stor-age tank, (111 rotational axis, ~12) axle arm (13) driving pulley, (14) bear-ing, ~15) ring nun, ~7) impeller, (16) cy~lindrical screw zone ~I), (16 a) conical zone, ~17) cylindrlcal screw zone (II).
A support 11 is suspended from the traverse member 2. The support 11 is driven at its upper free end 12 by a drive wheel 13. Below the bearing 14, the support 11 is axially displaceable by means of a threaded ring 15.
In addition, the support 11 is provided, before the beginning of the screw zone 16, with staggered stirrer blades or vanes 7 which are mounted for dis-placement perpendicularly of the axis of the support and for rotation about their own axis. Below the stirrer blade or vane 7 the support 11 continues in the form of a screw in such a way tkat a cylindrical-conical section 16, 16a is followed by another cylindrical section 17. It is also possible to use a purely conical section instead of a cylindrical-conical section 16, 16a.
The housing is provided on its inside, in the vicinity of the conical section 16a with fillets 18 ~see Figures 2 and 3) which extend at an angle to the generatrices of the conical section of the housing.
The upper part of the device serves as a feeding device for the pul-verised mixture. It is essentially a funnel with impellers, in the vertical arrangement of the device as shown. Of course the device can also be horizon-tally arr~nged. In this case the filling device is a funnel which rests laterally on the screw. In the funnel conveying means can be arranged to prevent channelling. The essential elements of the device are (16), (16a) and ~17). Requirements here are a uniform pitch and depth of the screw over its whole length, a ratio of the diameter of the cylindrical screw zone (I) to cylindrical screw zone ~II) from 2.5:1 to 1.5:1, an angle of taper of the conical screw zone from 10 to 35, and a length ratio of the cylindrical zone ~rl to the cylindrical zone (II) of 0.5:1 to 2:1. The inner wall of the screw housing can contain ridges for improving conveyance and output, as represented in Figures 2 and 3 ~reference number 18). It is also possible to provide separate cooling and heating devices for the different screw sections.
Claims
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method for the compaction of a vulcanisable rubber mixture con-sisting of rubber and additives including a vulcanising medium in the form of a pourable powder having a particle size of from 0.1 to 6 mm and a density of from 0.4 to 0.8 g/cm , wherein the mixture is passed through a continuously decreasing cross-section at a temperature of from 0 to 60°C, whereby a granu-lar, compact, yet not completely homogeneous mixture having a density of from 1.1 to 1.4 g/cm3 is produced.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762616666 DE2616666A1 (en) | 1976-04-15 | 1976-04-15 | COMPRESSING POWDERED RUBBER BLENDS |
| DEP2616666.5 | 1976-04-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1090970A true CA1090970A (en) | 1980-12-09 |
Family
ID=5975475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA276,068A Expired CA1090970A (en) | 1976-04-15 | 1977-04-13 | Compaction of pulverised rubber mixtures |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS52126482A (en) |
| AR (1) | AR210213A1 (en) |
| AU (1) | AU511946B2 (en) |
| BR (1) | BR7702350A (en) |
| CA (1) | CA1090970A (en) |
| DE (1) | DE2616666A1 (en) |
| ES (1) | ES457815A1 (en) |
| FR (1) | FR2348045A1 (en) |
| GB (1) | GB1550011A (en) |
| NL (1) | NL7704104A (en) |
| ZA (1) | ZA772288B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59106946A (en) * | 1982-12-10 | 1984-06-20 | Mitsui Petrochem Ind Ltd | Preparation of vulcanizable rubber compound |
| JP2966735B2 (en) * | 1994-07-29 | 1999-10-25 | 積水化成品工業株式会社 | Thermoplastic resin extruder |
| DE102016224607A1 (en) * | 2016-12-09 | 2018-06-14 | Raumedic Ag | Silicone extrusion line, process for silicone extrusion and silicone extrudate produced thereby |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE523705A (en) * | 1952-10-23 | 1900-01-01 | ||
| FR90683E (en) * | 1961-07-19 | 1968-01-26 | Pirelli | Method and apparatus for continuously mixing a plastic material |
| DE1454865B2 (en) * | 1965-02-13 | 1972-11-02 | Ruhrchemie Ag, 4200 Oberhausen-Holten | METHOD FOR PLASTIFYING HIGH MOLECULAR POLYAETHYLENE OR POLYPROPYLENE IN A SINGLE SCREW PRESS |
| DE2331299C2 (en) * | 1973-06-20 | 1983-01-13 | Chemische Werke Hüls AG, 4370 Marl | Process for the production of free-flowing, powdery, filler-free rubbers |
| DE2424249A1 (en) * | 1974-05-18 | 1975-11-27 | Bayer Ag | PROCESS FOR THE PRODUCTION OF POWDERED RUBBER-FILLER BATCHES |
| DE2439237C3 (en) * | 1974-08-16 | 1978-11-16 | Chemische Werke Huels Ag, 4370 Marl | Process for the production of powdery, non-sticking, free-flowing, filler-containing, optionally plasticizer oil-containing basic rubber mixtures and their use |
| DE2449489A1 (en) * | 1974-10-19 | 1976-04-29 | Bayer Ag | PROCESS AND DEVICE FOR THE PRODUCTION OF PRE-PLASTICIZED MATERIALS FROM HIGHLY MOLECULAR POWDER-MIXED PREPARATORY MIXTURES |
-
1976
- 1976-04-15 DE DE19762616666 patent/DE2616666A1/en not_active Withdrawn
-
1977
- 1977-04-12 GB GB15012/77A patent/GB1550011A/en not_active Expired
- 1977-04-13 CA CA276,068A patent/CA1090970A/en not_active Expired
- 1977-04-13 JP JP4160877A patent/JPS52126482A/en active Pending
- 1977-04-14 ES ES457815A patent/ES457815A1/en not_active Expired
- 1977-04-14 BR BR7702350A patent/BR7702350A/en unknown
- 1977-04-14 NL NL7704104A patent/NL7704104A/en not_active Application Discontinuation
- 1977-04-14 AU AU24246/77A patent/AU511946B2/en not_active Expired
- 1977-04-14 ZA ZA00772288A patent/ZA772288B/en unknown
- 1977-04-15 AR AR267235A patent/AR210213A1/en active
- 1977-04-15 FR FR7711493A patent/FR2348045A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| AU511946B2 (en) | 1980-09-11 |
| AU2424677A (en) | 1978-10-19 |
| DE2616666A1 (en) | 1978-03-02 |
| ZA772288B (en) | 1978-03-29 |
| NL7704104A (en) | 1977-10-18 |
| AR210213A1 (en) | 1977-06-30 |
| GB1550011A (en) | 1979-08-08 |
| BR7702350A (en) | 1978-05-09 |
| JPS52126482A (en) | 1977-10-24 |
| ES457815A1 (en) | 1978-03-01 |
| FR2348045A1 (en) | 1977-11-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5806441A (en) | Automatic carbon black discharging device in waste tire decomposing apparatus | |
| JPH08975A (en) | Continuous kneader for liquid and powder | |
| CA1090970A (en) | Compaction of pulverised rubber mixtures | |
| US3900547A (en) | Apparatus and method for forming pellets | |
| GB1455297A (en) | Apparatus for mixing separating or sorting dry substances or articles | |
| US3333038A (en) | Method for wet pelletizing carbon black | |
| AU2017274362B2 (en) | Method for manufacturing a rubber pellet, a rubber pellet as well as a product manufactured from such rubber pellet | |
| CA1079921A (en) | System for mixing pulverulent rubber with liquids and solids | |
| KR850000531B1 (en) | Apparatus for producing mixtures of thermoplastic synthetic resins & mineral or organic fillers | |
| US4130901A (en) | Plastication arrangement in a machine for processing polymeric materials | |
| US4124559A (en) | Compaction of pulverized rubber mixtures | |
| CN110577031A (en) | Modified asphalt stirring and storing device and method | |
| US4937034A (en) | Apparatus and method for cofeeding additives with polymer flake | |
| US3579717A (en) | Apparatus for pelletizing carbon black | |
| CN1148576A (en) | Method for manufacturing molded materials solidified by sulfur and apparatus used therein | |
| CN210874921U (en) | Vertical double helix conical mixer of production solid lubricant | |
| CN209853953U (en) | Granular solidification equipment of high moisture content mud | |
| US4770741A (en) | Accessory for a tire tread builder | |
| GB938378A (en) | Improvements in methods and apparatus for mixing rubber with particulate solid material | |
| US3245663A (en) | Agglomerator apparatus and method | |
| AU4832399A (en) | An improved form of synthetic rubber | |
| CN1132527C (en) | Polyvinyl acetate processing system for chewing gum | |
| CN1302995C (en) | Zinc oxide in the form of an improved flow powder, method for the production and use thereof in polymers | |
| CN215396057U (en) | Improved cement supply device in continuous cement concrete stirring equipment | |
| KR101997898B1 (en) | System for producing fuel by using a sludge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 19971209 |