GB2338920A - Screw conveyor type delivering and mixing device for plastics injection moulding machine - Google Patents

Screw conveyor type delivering and mixing device for plastics injection moulding machine Download PDF

Info

Publication number
GB2338920A
GB2338920A GB9813676A GB9813676A GB2338920A GB 2338920 A GB2338920 A GB 2338920A GB 9813676 A GB9813676 A GB 9813676A GB 9813676 A GB9813676 A GB 9813676A GB 2338920 A GB2338920 A GB 2338920A
Authority
GB
United Kingdom
Prior art keywords
section
large central
delivering
screw rod
small side
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.)
Withdrawn
Application number
GB9813676A
Other versions
GB9813676D0 (en
Inventor
Anderson Lau
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.)
WAN AN MACHINE PRODUCE CO Ltd
Original Assignee
WAN AN MACHINE PRODUCE CO Ltd
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 WAN AN MACHINE PRODUCE CO Ltd filed Critical WAN AN MACHINE PRODUCE CO Ltd
Priority to GB9813676A priority Critical patent/GB2338920A/en
Priority to DE29812507U priority patent/DE29812507U1/en
Publication of GB9813676D0 publication Critical patent/GB9813676D0/en
Publication of GB2338920A publication Critical patent/GB2338920A/en
Withdrawn legal-status Critical Current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
    • B29C45/60—Screws
    • 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
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • 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
    • B29C48/41—Intermeshing counter-rotating screws
    • 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
    • B29C48/425—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 using three or more screws
    • 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
    • B29C48/435—Sub-screws
    • 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
    • B29C48/505—Screws
    • B29C48/535—Screws with thread pitch varying along the longitudinal axis
    • 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
    • B29C48/505—Screws
    • B29C48/55—Screws having reverse-feeding elements
    • 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
    • B29C48/36—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
    • B29C48/683—Barrels or cylinders for more than two screws

Landscapes

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

Description

2338920 SCREW CONVEYOR TYPE DELIVERING AND MIXING DEVICE FOR PLASTICS
INJECTION MOULDING MACHINE The present invention relates to a screw conveyor-type delivering and mixing device for combinational use on a plastics injection moulding machine. The screw conveyor-type delivering and mixing device comprises a large central screw rod and two small side screw rods that are housed in a delivering tube having a material feeding opening at one end. The delivering tube has a large central tubular portion for accommodation of the large central screw rod and two small tubular side portions for housing the two small side screw rods. The central tubular portion communicates with the two tubular side portions along the full axial length thereof. All the screw rods have sections alternatively having coarse threads, fine threads and medium threads consecutively with different pitches. The screw rods housed in the delivering tube are reversely driven to rotate with the threads of the large central screw rod in mesh with those of the small side screw rods so as not only to deliver plastic materials but also to crush and mix the same at different temperatures at di fferent sections along the delivering tube.
Conventional screw conveyors for use on a plastic injection moulding machine use only one screw rod to transmit raw plastic material without getting the same crushed and mixed in delivery, so it provides plastic injection materials of very poor quality; moreover, the raw material cannot be fed in a powder form and must be converted into grains for delivery.
A known improved screw conveyor delivering device is designed to have two reversely rotated screw rods to both deliver and crush plastic grains. Such device 2 provides plastic mixture with improved quality in one aspect, and plastic powder can also be delivered in another aspect. However, various PVC materials can still not be effectively mixed with the prior art delivering service.
Therefore, the primary object of the present invention is to provide a screw conveyor-type delivering and mixing device for combinational use on a plastics injection moulding machine which is equipped with a large central screw rod and two small side screw rods housed in a delivering tube having a central tubular.portion and two integral small side tubular portions. Each of the screw rods is alternatively divided into several sections having different coarse, medium and fine threads and pitches and is driven with the two small rods rotated in a reverse direction with respect to the large rod whereby plastic material delivered in the delivering tube can be crushed, pressed and mixed in a more smooth manner.
Another object of the present invention is to provide a screw conveyor-type delivering and mixing device in which raw plastic powder can be fed directly without the trouble of processing the powder material into grains in advance.
One further object of the present invention is to provide a screw conveyor-type delivering and mixing device in which various kinds of PVC materials can be fed to be crushed and mixed.
one still further object of the present invention is to provide a screw conveyor-type delivering and mixing device which is equipped with a heating means which can provide heat to different sections of the delivering tube to keep the sections working at desired temperatures respectively.
Figure 1 is a sectional view of the assembly of the screw conveyor plastics delivering and mixing device for plastics injection moulding machine of the present invention; Figure 1A is a front view of the assembled tube units of the material delivering tube; Figure 2 is a perspective diagram showing the tube unit of the material delivering tube.
Referring to Figure 1, the sectional diagram of the assembly of the present invention is illustrated.
It mainly comprises a large central screw rod 10 and two symmetric small side screw rods 20. The three rods 10, 20 start from transmission terminals and extend respectively into a coarsely threaded feeding section 11, 21 having a relatively large pitch; and next extend into a finely threaded squeezing section 12, 22 having relatively small threads and pitches in connection to a buffer section 13, 23 respectively; and further extend into a coarsely threaded mixing section 14, 24, same as the feeding section 11, 21 and finally extend into a mediumly threaded controlling section 15, 25 respectively having medium-sized threads and pitches.
The threads or teeth of the three screw rods 10, 20 are in mesh with one another at each section thereof. Between the intersection of every two above cited sections of each screw rod 10, 20 is disposed a smooth blank section 16, 26 respectively. The right end of the screw rods 10, 20, as viewed in Figure 1, are provided with an engagement section 17, 27 respectively for power transmission purposes. At the left end of the screw rods 10, 20, as viewed in Figure 1, is disposed a pointed plasticizing section 18, 28 respectively through which melted plastics flow into an injection moulding machine.
4 Referring to Figure 2, basic delivering tube units 30 each having a circular flange 35 at one end thereof are joined together end to end to form the delivering tube 3. Each tube unit 30 is provided with a large central tubular portion 31 in conformance to the large central screw rod 10 and two small side tubular portions 32 in conformance to the two small side screw rods 20. The two small side tubular portions 32 are in communication with the large central tubular portion 31 axially along the full length thereof. The delivering tube 3 accommodates the three screw rods 10, 20 with the threads or teeth of the screw rods 10 in mesh with those of the screw rod 20 respectively.
A base tube unit 30 disposed at the beginning of the feeding section 11, 21 of the delivering tube 3 is provided with a side opening 33 for feeding raw plastic material into the delivering tube 3. The pointed plasticizing sections 18, 28 defined at the leftmost ends of the screw rods 10, 20 are engaged with a melting sleeve 34 disposed at the front end of the delivery tube 3.
Furthermore, a heating means 4 in operational association with each section of the delivering tube 3 serves to supply heat thereto so as to keep the different sections working at various temperatures.
When PVC powder or grains are fed into the material delivering tube 3 via the side opening 33, power is supplied to the screw rods 10, 20 respectively by way of the engagement sections 17, 27 in such a manner that the screw rods 10 and the screw rods 40 are rotated in reverse directions whereby plastic powder or grains transmitted in the delivering tube 3 will be crushed and mixed all the way in delivery. Besides, at different sections of the I- delivering tube 3 the plastic powder or grains are heated at various temperatures and melted, as described above.
Typically, the feeding sections 11, 21, the mixing sections 12, 22, and the minutely controlling sections 15, 25 are heated up to a temperature of 175OC; and the.squeezing sections 12, 22 and the buffer sections 13, 23 are heated up to a temperature of 1800C to get the plastic powder or grains to melt.
It dan be clearly seen that the screw rods of the screw conveyor device of the present invention are provided with sections of different pitches and kinds of threads or teeth and are driven to rotate in reverse directions and each section of the delivering tube is controllably heated up to different temperatures so as to produce various degrees of crushing, squeezing effects in such a manner that plastic material is smoothly and completely mixed. Besides, plastic powder can be fed into the delivery tube directly without the trouble of getting the powder into grains form in one aspect; and different kinds of PVC materials can be squeezed and mixed directly in another aspect, greatly facilitating the mixing of all kinds of plastic materials for plastics injection moulding operations.

Claims (4)

1. A screw conveyor-type delivering and mixing device for combinational use on a plastics injection moulding machine, comprising:
a delivering tube having a material feeding opening at one end for receiving raw plastic materials; relatively large central screw rod; plurality of relatively small side screw rods rotationally engaged with said relatively large central screw rod; said relatively large central screw rod and said relatively small side screw rods being housed in said delivering tube; said relatively large central screw rod and said relatively small side screw rods identically divided into alternating sections having different kinds of threads and pitches; said relatively large central screw rod and said relatively small side screw rods all having an engagement end permitting said central screw rod to be rotated in a reverse direction with respect to said relatively small side screw rods in operation by external power; said threads of said central screw rod being in mesh with said threads of said relatively small screw rods at each section; said delivering tube having a large central tubular portion in conformance to said relatively large central screw rod and a number of small tubular portions in conformance to said relatively small side screw rods; said large central tubular portion communicating with each said small tubular portion along the full axial length thereof; a heating means in operational association with said delivering tube at different sections of said relatively large central screw rod and said relatively small side screw rods so as to keep said sections working at desired temperatures.
2. The screw conveyor type delivering and mixing device as claimed in claim 1 wherein said relatively large central screw rod and two relatively small side screw rods are housed in a delivering tube having a large central tubular portion and two small side tubular portions; each said small side tubular portion communicating with said large central tubular portion along the full axial length thereof; said relatively large central screw rod and said two relatively small side screw rods are identically divided consecutively into an engagement section, a blank section, a coarsely threaded feeding section with large pitches, a blank section, a finely threaded squeezing section with small pitches, a blank section, a mediumly threaded buffer section with medium pitches, a blank section, a coarsely threaded mixing section, a blank section, a mediumly threaded controlling section with medium pitches; said large central screw rod and said small side screw rods terminate in pointed heads which are all housed in a plasticizing sleeve disposed at the end of said delivering tube, through which melted plastic material is injected, whereby raw plastic powder or grains can be delivered, crushed, mixed evenly and effectively when delivered along the delivering tube from one end thereof to the other.
3. The delivering and mixing device as claimed in claim 1 wherein said delivering tube comprises a plurality of tube units each having a circular flange 8 at one end thereof, whereby said tube units can be joined end to end to form said delivering tube.
4. The delivering and mixing device as claimed in claim 2, wherein said feeding section, said mixing section and said minutely controlling section are heated up to a temperature of 1750C and said squeezing section and buffer section are heated up to a temperature of 1800C whereby plastic powder or grains can be effectively melted and crushed and mixed in use.
GB9813676A 1998-06-24 1998-06-24 Screw conveyor type delivering and mixing device for plastics injection moulding machine Withdrawn GB2338920A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9813676A GB2338920A (en) 1998-06-24 1998-06-24 Screw conveyor type delivering and mixing device for plastics injection moulding machine
DE29812507U DE29812507U1 (en) 1998-06-24 1998-07-14 Mixing and conveying device of an injection molding machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9813676A GB2338920A (en) 1998-06-24 1998-06-24 Screw conveyor type delivering and mixing device for plastics injection moulding machine
DE29812507U DE29812507U1 (en) 1998-06-24 1998-07-14 Mixing and conveying device of an injection molding machine

Publications (2)

Publication Number Publication Date
GB9813676D0 GB9813676D0 (en) 1998-08-26
GB2338920A true GB2338920A (en) 2000-01-12

Family

ID=26061665

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9813676A Withdrawn GB2338920A (en) 1998-06-24 1998-06-24 Screw conveyor type delivering and mixing device for plastics injection moulding machine

Country Status (2)

Country Link
DE (1) DE29812507U1 (en)
GB (1) GB2338920A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL268544B2 (en) * 2019-08-06 2023-03-01 O E D A Liad Holdings 2006 Ltd Self-cleaning gravimetric and volumetric dosing apparatuses

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB618518A (en) * 1942-09-18 1949-02-23 Lavorazione Mat Plast Apparatus for mixing and extruding plastic materials
US4514163A (en) * 1983-11-28 1985-04-30 Kensaku Nakamura Synthetic resin extruding means
EP0143894A2 (en) * 1983-10-04 1985-06-12 RB Kunststoffpatent-Verwertungs AG Method of carrying out chemical reactions, especially for producing synthetic plastics, by using extruders, and equipment therefor
WO1997015433A1 (en) * 1995-10-21 1997-05-01 Gefinex-Jackon Gmbh Extruder for plastics

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB618518A (en) * 1942-09-18 1949-02-23 Lavorazione Mat Plast Apparatus for mixing and extruding plastic materials
EP0143894A2 (en) * 1983-10-04 1985-06-12 RB Kunststoffpatent-Verwertungs AG Method of carrying out chemical reactions, especially for producing synthetic plastics, by using extruders, and equipment therefor
US4514163A (en) * 1983-11-28 1985-04-30 Kensaku Nakamura Synthetic resin extruding means
WO1997015433A1 (en) * 1995-10-21 1997-05-01 Gefinex-Jackon Gmbh Extruder for plastics

Also Published As

Publication number Publication date
DE29812507U1 (en) 1998-10-22
GB9813676D0 (en) 1998-08-26

Similar Documents

Publication Publication Date Title
US20170291364A1 (en) Single screw micro-extruder for 3d printing
US2519014A (en) Compounding and molding machine
CN1052184C (en) Multi-shaft continuously operating mixer for mixing plastifiable materials
US6776596B2 (en) Apparatus for the manufacture of fiber-reinforced plastic compositions
EP0456230B1 (en) Extrusion screw
US4733970A (en) Extruder screw
US5153008A (en) Extrusion welder
KR20160089437A (en) Method for producing transparent resin composition
US20040080064A1 (en) Computer-controlled compounding extrusion blending apparatus and method
EP0909627A1 (en) A method of and systems for kneading and injecting a composite resin
US5842782A (en) Screw conveyor-type delivery and mixing device for plastics injecting molding machine
EP1448356B1 (en) Mixing element/section of a screw in a plastification apparatus
US3689184A (en) Injection molding device
CN2144050Y (en) Extruder
GB2338920A (en) Screw conveyor type delivering and mixing device for plastics injection moulding machine
CN105365196A (en) Twin-screw extruder
CN110450402A (en) A kind of bi-material layers 3D printing extrusion device and its application method
US3998439A (en) Apparatus for mixing materials in molding machines
KR20040041572A (en) Method and device for the continuous production of rubber mixtures
AU624386B2 (en) Feed unit for an extruder
CN210453801U (en) Reducing screw and thermoplastic particle material melt extrusion device adopting same
JP3786981B2 (en) Full flight screw and screw type injection machine for fiber reinforced thermoplastic resin kneading
CN205112337U (en) Twin screw extruder
CN205075313U (en) A screw rod combination for processing of nanometer powder master batch
JP2816356B2 (en) Extrusion molding equipment

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)