GB2014897A - Filtering in injection nozzles - Google Patents

Filtering in injection nozzles

Info

Publication number
GB2014897A
GB2014897A GB7904422A GB7904422A GB2014897A GB 2014897 A GB2014897 A GB 2014897A GB 7904422 A GB7904422 A GB 7904422A GB 7904422 A GB7904422 A GB 7904422A GB 2014897 A GB2014897 A GB 2014897A
Authority
GB
United Kingdom
Prior art keywords
plastics material
nozzle
breaker plate
fine screen
screen
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.)
Granted
Application number
GB7904422A
Other versions
GB2014897B (en
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.)
Dart Industries Inc
Original Assignee
Dart Industries Inc
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 Dart Industries Inc filed Critical Dart Industries Inc
Publication of GB2014897A publication Critical patent/GB2014897A/en
Application granted granted Critical
Publication of GB2014897B publication Critical patent/GB2014897B/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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/581—Devices for influencing the material flow, e.g. "torpedo constructions" or mixing devices
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/20—Injection nozzles
    • B29C45/24—Cleaning equipment

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

A method of injection moulding plastics materials primarily from the family of polyolefins and particularly polyethylene, polypropylene, linear polyethylene, copolymers, and styrene, includes the step of forcing a molten plastics material through a breaker plate 12 and a fine screen 13 immediately upstream of an injection nozzle 10. This step aids the uniform dispersion of colour in the plastics material and helps to eliminate the inclusion or optically (human) observable black particles, such as carbonized pieces of the plastics material or other ingredients in the moulded product. A nozzle assembly for use with an injection moulding apparatus in performing such a method consists essentially of an injection nozzle 10, and a screen pack retainer 11 adapted to be connected to a source of molten plastics material and to which the nozzle is secured, the breaker plate 12, the fine screen 13 and if desired an additional breaker plate 14 being clamped between the nozzle and retainer so as to lie in the path of the molten plastics material. Apertures in the breaker plate or plates are larger than the openings in the fine screen, the fine screen comprising either a single fine screen or a screen pack of several fine mesh screens which may if appropriate be of varying mesh sizes. <IMAGE>
GB7904422A 1978-02-09 1979-02-08 Filtering in injection nozzles Expired GB2014897B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87643378A 1978-02-09 1978-02-09

Publications (2)

Publication Number Publication Date
GB2014897A true GB2014897A (en) 1979-09-05
GB2014897B GB2014897B (en) 1982-06-03

Family

ID=25367694

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7904422A Expired GB2014897B (en) 1978-02-09 1979-02-08 Filtering in injection nozzles

Country Status (16)

Country Link
JP (1) JPS54117560A (en)
AR (1) AR215981A1 (en)
BE (1) BE874043A (en)
BR (1) BR7900796A (en)
CA (1) CA1126457A (en)
ES (2) ES477606A1 (en)
FR (1) FR2416790A1 (en)
GB (1) GB2014897B (en)
GR (1) GR64949B (en)
HK (1) HK7885A (en)
KE (1) KE3397A (en)
MY (1) MY8500502A (en)
NZ (1) NZ189604A (en)
PH (1) PH17464A (en)
SG (1) SG21084G (en)
ZA (1) ZA79577B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175533A (en) * 1985-04-22 1986-12-03 C R M Design Services Ltd Injection moulding nozzle filter
GB2236261A (en) * 1989-08-30 1991-04-03 Delco Electronic Overseas Corp Filter nozzle assembly
US11602882B2 (en) 2015-07-16 2023-03-14 Nihon Spindle Manufacturing Co., Ltd. Straining mechanism and screw extruder including straining mechanism

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4419405C2 (en) * 1994-06-03 1996-11-21 Kloeckner Desma Elastomertechn Plasticizing and injection unit for injection molding machines for the production of rubber or plastic articles

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL278425A (en) * 1961-02-07 1900-01-01
DE2441475A1 (en) * 1974-08-29 1976-03-11 Segmueller Ag ILTER DEVICE
NL7601569A (en) * 1975-04-17 1976-10-19 Mobil Oil Corp FILTER SIEVE FITTED POLYMERS EXTRUSION DEVICE.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175533A (en) * 1985-04-22 1986-12-03 C R M Design Services Ltd Injection moulding nozzle filter
GB2236261A (en) * 1989-08-30 1991-04-03 Delco Electronic Overseas Corp Filter nozzle assembly
US11602882B2 (en) 2015-07-16 2023-03-14 Nihon Spindle Manufacturing Co., Ltd. Straining mechanism and screw extruder including straining mechanism

Also Published As

Publication number Publication date
GR64949B (en) 1980-06-10
ES477606A1 (en) 1979-10-16
NZ189604A (en) 1983-05-10
BE874043A (en) 1979-05-29
KE3397A (en) 1984-06-08
HK7885A (en) 1985-02-08
ZA79577B (en) 1980-02-27
GB2014897B (en) 1982-06-03
FR2416790B1 (en) 1982-07-30
FR2416790A1 (en) 1979-09-07
MY8500502A (en) 1985-12-31
PH17464A (en) 1984-08-29
AR215981A1 (en) 1979-11-15
BR7900796A (en) 1979-09-04
CA1126457A (en) 1982-06-29
ES478431A1 (en) 1979-06-16
JPS54117560A (en) 1979-09-12
SG21084G (en) 1985-01-04

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930208