GB1498801A - Screw conveyor and moulding apparatus - Google Patents

Screw conveyor and moulding apparatus

Info

Publication number
GB1498801A
GB1498801A GB3471/74A GB347174A GB1498801A GB 1498801 A GB1498801 A GB 1498801A GB 3471/74 A GB3471/74 A GB 3471/74A GB 347174 A GB347174 A GB 347174A GB 1498801 A GB1498801 A GB 1498801A
Authority
GB
United Kingdom
Prior art keywords
moulding
preform
station
pair
feeder
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
Application number
GB3471/74A
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.)
EMI Electrola GmbH
Original Assignee
EMI Electrola GmbH
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 EMI Electrola GmbH filed Critical EMI Electrola GmbH
Priority to GB3471/74A priority Critical patent/GB1498801A/en
Priority to DE2502545A priority patent/DE2502545C3/en
Publication of GB1498801A publication Critical patent/GB1498801A/en
Expired legal-status Critical Current

Links

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
    • 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
    • B29C48/695—Flow dividers, e.g. breaker plates
    • 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
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/38—Plasticisers, homogenisers or feeders comprising two or more stages using two or more serially arranged screws in the same barrel
    • 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

Abstract

1498801 Feeding moulding presses EMI ELECTROLA GmbH 22 Jan 1975 [25 Jan 1974] 03471/74 Heading B5A Each one of a pair of automatic gramophone moulding presses 1, 2, is intermittently supplied with moulding material by one of a pair of alternately acting delivery screws 22, 23, of extruders 30, 31, which are supplied with plasticized material from a continuously operating twin screw feeder 12. The material, in granular or powder form, is supplied to the feeder 12 by a hopper 26, and the supply from the feeder 12 to each of the screws 22, 23 is alternately effected, respectively via ports 20, 21 in an adapter 18 which has frusto-conical entries to the ports, bridged by a groove 19 facilitating the changeover of the supply between the ports. Each screw 22, 23, respectively has separate drive means 24, 25, which automatically operate alternately, as the other drive ceases and is driven for a short interval in the reverse direction in order to prevent leakage from the nozzle 10 or 11 of its extruder. Each moulding press 1 or 2 comprises a preform station 4 at which a preform is formed from material delivered by the nozzle 10 or 11, and a pressing station 5 to which a preform is delivered from station 4, by a pair of claws 6 which are reciprocable towards and away from each other, and towards and away from the pressing station 5.
GB3471/74A 1974-01-25 1974-01-25 Screw conveyor and moulding apparatus Expired GB1498801A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3471/74A GB1498801A (en) 1974-01-25 1974-01-25 Screw conveyor and moulding apparatus
DE2502545A DE2502545C3 (en) 1974-01-25 1975-01-23 Device for plasticizing Schallplattenmas sen and for feeding to Schallplattenpreßvorrichtungen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3471/74A GB1498801A (en) 1974-01-25 1974-01-25 Screw conveyor and moulding apparatus

Publications (1)

Publication Number Publication Date
GB1498801A true GB1498801A (en) 1978-01-25

Family

ID=9758947

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3471/74A Expired GB1498801A (en) 1974-01-25 1974-01-25 Screw conveyor and moulding apparatus

Country Status (2)

Country Link
DE (1) DE2502545C3 (en)
GB (1) GB1498801A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1117750B (en) * 1977-08-05 1986-02-17 Bersano Terenzio DOUBLE-FEED TWIN-STAGE AND MULTI-STAGE EXTRUDER

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE960854C (en) * 1954-01-29 1957-03-28 Huber Karl Injection molding machine
DE1917051U (en) * 1961-03-27 1965-06-03 Lavorazione Mat Plastiche Sas CONVEYOR DEVICE WORKING ACCORDING TO THE SCREW PRINCIPLE FOR LOADING EXTRUSION PRESSES WITH THERMOPLASTIC PLASTIC POWDER OR GRANULATE.
FR1449057A (en) * 1965-07-02 1966-08-12 Etablissements Andouart Soc D Improvements in plastic extrusion

Also Published As

Publication number Publication date
DE2502545A1 (en) 1975-07-31
DE2502545B2 (en) 1980-06-26
DE2502545C3 (en) 1981-03-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee