US2616130A - Appliance for delivering plastic substances under high pressure - Google Patents

Appliance for delivering plastic substances under high pressure Download PDF

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Publication number
US2616130A
US2616130A US114336A US11433649A US2616130A US 2616130 A US2616130 A US 2616130A US 114336 A US114336 A US 114336A US 11433649 A US11433649 A US 11433649A US 2616130 A US2616130 A US 2616130A
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piston
appliance
chamber
annular member
substances under
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US114336A
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Banz Friedrich
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    • 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
    • B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
    • 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
    • B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
    • B29C2045/537—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston the injection plunger cooperating with a coaxial hollow transfer plunger

Definitions

  • the present invention relates to an appliance for delivering plastic" substances under high pressure.
  • Known appliances for delivering plastic substances have, for taking the plastic substance, two pressure chambers which are alternately filled and alternately emptied through a common mouthpiece. While the substance is being pressed out of one pressure chamber and being filled into the other, the connection between the two chambers through the common ejection mouthpiece is to be broken, the member which effects this connection or this interruption having to keep tight against the high pressing pressure and being therefore complicated to construct and control.
  • the appliance according to the invention has two pistons which are arranged concentrically to each other and are axially displaceable independent of each other in a pressure chamber connected to the ejection mouthpiece for the substance and to a storage container for the substance, an annular member coupled to the inner piston being arranged in this chamber axially displaceable along the wall of the chamber.
  • a pressure chamber I with ejection mouthpiece 2 for the plastic substance two pistons 3 and 4 are displaceably arranged, which are concentric to each other and movable independent of each other.
  • the inner piston 3 has a piston plate 6 displaceable in the pressure cylinder 5, whilst the outer hollow piston 4 is connected to the piston plate 8 displaceable in the pressure cylinder 1.
  • annular member 9 is arranged displaceable along the wall of the pressure chamber; the bore in this member is less than the diameter of the inner piston 3, and the member is held between the end of the piston 3 and four ribs I0 extending radially out from the piston.
  • This annular member 9 is thus coupled to the piston 3 and moves with it, whereby it is movable between the end of the piston and the ribs I0 serving as displacing means.
  • a funnel-shaped storage container II is fitted for holding the plastic mass to be pressed; the container I I is in connection with the pressure chamber I through an opening I2, this opening being controlled by the piston 4.
  • Pipes I3 to I6 allow of a pressure medium, for instance oil, being admitted and/or led away for 3 Claims. (CI. 18-30) moving the pistons.
  • a pressure medium for instance oil
  • this admission and removal of the pressure medium is controlled in a certain rhythm by means not shown in the drawing.
  • piston 3 moves towards the ejection opening 2 and thereby carries the annular member 9 along with it,. so thatthe substances in front of the piston and member 9 is compressed and ejected.
  • the space behind the annular member 9 and round the piston 3 fills with plastic substance from the storage container II.
  • the following piston 4 compresses this substance, pressing out any air present in it, up to the pressure prevailing in front of the piston 3.
  • piston 4 closes the opening I2 when passingalong, and the piston 3 commences its return stroke.
  • the annular member 9 then comes to lie against the ribs I0, and the substance delivered by the piston 4 flows through the bore of the ring past the ribs Ill into the end of the pressure chamber I where the ejection mouthpiece 2 islocated.
  • the pistons 3 and 4 have simultaneously arrived respectively at the rear end and at the front end of their strokes, their directions of motion are reversed.
  • the annular member 9 comes to lie against the tapered front end of the piston 3, and the plastic substance in front of the ring 9 and the piston is pressed out through the ejection mouthpiece, after which the described cycle starts again.
  • a device for delivering plastic substances under pressure in combination, an inner piston and an outer piston in coaxial arrangement to each other, a common pressure chamber in which said pistons are axially movable, an ejection mouthpiece at one end of said pressure chamber, a storage container connected to said chamber at a point rearwardly of the position of furthest rearward movement of said inner piston, spaced abutments on the forward end of the inner piston, said end being of reduced diameter adjacent said abutments, and an annular member having a bore in which is received the said end of reduced diameter and having an external diameter corresponding to the diameter of said chamber, said annular member being slidable along the inner wall of said chamber and movable between said spaced abutments and the main portion of the said inner piston, said end of said inner piston being movable into closin relation with the bore in the annular member on the forward stroke t e eoi.
  • a device for delivering plastic substances under pressure in combination, an inner piston and an outer piston in coaxial arrangement to each other, a common pressure chamber in which said pistons are axially movable, an ejection mouthpiece at one end of said pressure chamber," a storage container connected to said chamber at a point rearwardly of the position of furthest rearward movement of said inner piston,
  • the inner piston having a tapered end, ribs on said tapered end, an annular member slidable along the inner wall of said chamber and movable over the tapered portion of said inner piston between said ribs and the main portion-of the piston and having an external diameter corresponding to the diameter of said chamber, the bore in said annular member being-ofless diameter than the outer diameter of said inner piston, and said tapered end of said inner piston being movable into closing relation with the bore in' the annular member on thevforward-stroke thereof.
  • a device for delivering plastic substances under pressure in combination, an inner piston and an outer piston in coaxial arrangement to each other, a common pressure chamber in which said pistons are axially movable, an ejection mouthpiece at one end of said pressure chamber, a storage container connected to said chamber, the inner piston having a tapered end, ribs on said tapered end, an annular member slidable along the inner wall of said chamber and movable over the tapered portion of said inner piston between said ribs and the main portion of the piston and having an external diameter corresponding to the diameter of said chamber, the bore in said annular member being of less diameter than' the'souterzdiameter of said inner piston, and a communication port between said storage container and the pressure chamber at a; point rearwardly of the position of furthest rearward movement of said inner piston and controlled by. the outer piston, the tapered end of said inner piston being movable into closing relationwithhtheebore in the annular member on theforward stroke thereof.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Description

Nov. 4, 1952 BANZ 2,616,130
APPLIANCE FOR DELIVERING PLASTIC SUBSTANCES UNDER HIGH PRESSURE Filed Sept. 7, 1949 l N V ENTOR'.
FRIEDRICH BA ATTORN Ey Patented Nov. 4, 1 952 OFFICE APPLIANCE FOR DELIVERING PL ASTIC SUBSTANCES UNDER HIGH PRESSURE Friedrich Banz, Erlenbach, near Zurich,
Switzerland Application September 7, 1949, Serial No. 114,336 In Switzerland June 16, 1949 The present invention relates to an appliance for delivering plastic" substances under high pressure. I
Known appliances for delivering plastic substances have, for taking the plastic substance, two pressure chambers which are alternately filled and alternately emptied through a common mouthpiece. While the substance is being pressed out of one pressure chamber and being filled into the other, the connection between the two chambers through the common ejection mouthpiece is to be broken, the member which effects this connection or this interruption having to keep tight against the high pressing pressure and being therefore complicated to construct and control.
The appliance according to the invention has two pistons which are arranged concentrically to each other and are axially displaceable independent of each other in a pressure chamber connected to the ejection mouthpiece for the substance and to a storage container for the substance, an annular member coupled to the inner piston being arranged in this chamber axially displaceable along the wall of the chamber.
One example of execution according to the invention is illustrated in the accompanying drawing.
According to this drawing, in a pressure chamber I with ejection mouthpiece 2 for the plastic substance, two pistons 3 and 4 are displaceably arranged, which are concentric to each other and movable independent of each other. The inner piston 3 has a piston plate 6 displaceable in the pressure cylinder 5, whilst the outer hollow piston 4 is connected to the piston plate 8 displaceable in the pressure cylinder 1.
In the pressure chamber I an annular member 9 is arranged displaceable along the wall of the pressure chamber; the bore in this member is less than the diameter of the inner piston 3, and the member is held between the end of the piston 3 and four ribs I0 extending radially out from the piston. This annular member 9 is thus coupled to the piston 3 and moves with it, whereby it is movable between the end of the piston and the ribs I0 serving as displacing means.
On the pressure chamber I a funnel-shaped storage container II is fitted for holding the plastic mass to be pressed; the container I I is in connection with the pressure chamber I through an opening I2, this opening being controlled by the piston 4.
Pipes I3 to I6 allow of a pressure medium, for instance oil, being admitted and/or led away for 3 Claims. (CI. 18-30) moving the pistons. As can be seen from the following description of the method of working of the appliance, this admission and removal of the pressure medium is controlled in a certain rhythm by means not shown in the drawing.
.Starting with the parts in the position illustrated, the piston 3 moves towards the ejection opening 2 and thereby carries the annular member 9 along with it,. so thatthe substances in front of the piston and member 9 is compressed and ejected. At the same time the space behind the annular member 9 and round the piston 3 fills with plastic substance from the storage container II. The following piston 4 compresses this substance, pressing out any air present in it, up to the pressure prevailing in front of the piston 3. In addition, piston 4 closes the opening I2 when passingalong, and the piston 3 commences its return stroke. The annular member 9 then comes to lie against the ribs I0, and the substance delivered by the piston 4 flows through the bore of the ring past the ribs Ill into the end of the pressure chamber I where the ejection mouthpiece 2 islocated. When the pistons 3 and 4 have simultaneously arrived respectively at the rear end and at the front end of their strokes, their directions of motion are reversed. The annular member 9 comes to lie against the tapered front end of the piston 3, and the plastic substance in front of the ring 9 and the piston is pressed out through the ejection mouthpiece, after which the described cycle starts again.
What I claim is:
1. In a device for delivering plastic substances under pressure, in combination, an inner piston and an outer piston in coaxial arrangement to each other, a common pressure chamber in which said pistons are axially movable, an ejection mouthpiece at one end of said pressure chamber, a storage container connected to said chamber at a point rearwardly of the position of furthest rearward movement of said inner piston, spaced abutments on the forward end of the inner piston, said end being of reduced diameter adjacent said abutments, and an annular member having a bore in which is received the said end of reduced diameter and having an external diameter corresponding to the diameter of said chamber, said annular member being slidable along the inner wall of said chamber and movable between said spaced abutments and the main portion of the said inner piston, said end of said inner piston being movable into closin relation with the bore in the annular member on the forward stroke t e eoi.
2. In a device for delivering plastic substances under pressure in combination, an inner piston and an outer piston in coaxial arrangement to each other, a common pressure chamber in which said pistons are axially movable, an ejection mouthpiece at one end of said pressure chamber," a storage container connected to said chamber at a point rearwardly of the position of furthest rearward movement of said inner piston,
the inner piston having a tapered end, ribs on said tapered end, an annular member slidable along the inner wall of said chamber and movable over the tapered portion of said inner piston between said ribs and the main portion-of the piston and having an external diameter corresponding to the diameter of said chamber, the bore in said annular member being-ofless diameter than the outer diameter of said inner piston, and said tapered end of said inner piston being movable into closing relation with the bore in' the annular member on thevforward-stroke thereof.
3. In a device for delivering plastic substances under pressure in combination, an inner piston and an outer piston in coaxial arrangement to each other, a common pressure chamber in which said pistons are axially movable, an ejection mouthpiece at one end of said pressure chamber, a storage container connected to said chamber, the inner piston having a tapered end, ribs on said tapered end, an annular member slidable along the inner wall of said chamber and movable over the tapered portion of said inner piston between said ribs and the main portion of the piston and having an external diameter corresponding to the diameter of said chamber, the bore in said annular member being of less diameter than' the'souterzdiameter of said inner piston, and a communication port between said storage container and the pressure chamber at a; point rearwardly of the position of furthest rearward movement of said inner piston and controlled by. the outer piston, the tapered end of said inner piston being movable into closing relationwithhtheebore in the annular member on theforward stroke thereof.
FRIEDRICH BANZ.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 777,870 Vel1ino.'.. .v Dec. 20, 1904 856,026 Brown-et a1; June 4, 1907 2,454,661 Lester et a1 Nov. 23, 1948 FOREIGN PATENTS Number Country Date 501,277 Great Britain Feb. 21, 1939
US114336A 1949-06-16 1949-09-07 Appliance for delivering plastic substances under high pressure Expired - Lifetime US2616130A (en)

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758338A (en) * 1952-04-02 1956-08-14 Crown Cork & Seal Co Plastic measuring device
US2798256A (en) * 1953-06-02 1957-07-09 Eynard Elysee Injection moulding machines
US3020591A (en) * 1959-01-26 1962-02-13 Stubbe Friedrich Injection molding machine
US3040382A (en) * 1958-10-08 1962-06-26 Lecat Pierre Device for preplasticization in injection presses
US3131433A (en) * 1959-03-03 1964-05-05 Grundig Max Injection molding machine
US3179134A (en) * 1962-02-02 1965-04-20 Sigrist Robert Pneumatic filling apparatus for expanded polystyrene
US3263276A (en) * 1961-10-30 1966-08-02 Maier Richard Injection molding machine
US3372433A (en) * 1962-12-22 1968-03-12 Inv S Finance Corp Mold clamping apparatus
US3395424A (en) * 1966-06-01 1968-08-06 Inv S Finance Corp Method and apparatus for moulding
US3398435A (en) * 1965-10-22 1968-08-27 Inv S Finance Corp Method and apparatus for molding plastics
US3695575A (en) * 1969-06-18 1972-10-03 Bucher Guyer Ag Masch Injection molding machine having a plasticizing plunger
US3834585A (en) * 1971-02-18 1974-09-10 Standard Oil Co Plastics accumulator having first-in, first-out arrangement
US20100103765A1 (en) * 2008-10-24 2010-04-29 Hornbostel Marc D Liquid injector for silicon production
EP2668017A1 (en) * 2011-01-28 2013-12-04 Husky Injection Molding Systems S.A. Plasticizing system including opposite-facing surfaces for contacting opposite sides of solidified-resin particle
IT201600069730A1 (en) * 2016-07-05 2018-01-05 Sipa Progettazione Automaz FUSE PLASTIC INJECTION DEVICE
JP7375730B2 (en) 2020-11-16 2023-11-08 トヨタ自動車株式会社 Injection molding machine, injection molding device and injection molding method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US777870A (en) * 1902-07-25 1904-12-20 Carlos Vellino Metal-pump.
US856026A (en) * 1904-05-24 1907-06-04 Nat Compositype Company Pump mechanism for type-casting machines.
GB501277A (en) * 1937-08-21 1939-02-21 Henry Grafton Improvements in and relating to the moulding of thermoplastic materials by injection
US2454661A (en) * 1945-05-17 1948-11-23 Lester Engineering Co Extrusion machine for plastic material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US777870A (en) * 1902-07-25 1904-12-20 Carlos Vellino Metal-pump.
US856026A (en) * 1904-05-24 1907-06-04 Nat Compositype Company Pump mechanism for type-casting machines.
GB501277A (en) * 1937-08-21 1939-02-21 Henry Grafton Improvements in and relating to the moulding of thermoplastic materials by injection
US2454661A (en) * 1945-05-17 1948-11-23 Lester Engineering Co Extrusion machine for plastic material

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758338A (en) * 1952-04-02 1956-08-14 Crown Cork & Seal Co Plastic measuring device
US2798256A (en) * 1953-06-02 1957-07-09 Eynard Elysee Injection moulding machines
US3040382A (en) * 1958-10-08 1962-06-26 Lecat Pierre Device for preplasticization in injection presses
US3020591A (en) * 1959-01-26 1962-02-13 Stubbe Friedrich Injection molding machine
US3131433A (en) * 1959-03-03 1964-05-05 Grundig Max Injection molding machine
US3263276A (en) * 1961-10-30 1966-08-02 Maier Richard Injection molding machine
US3179134A (en) * 1962-02-02 1965-04-20 Sigrist Robert Pneumatic filling apparatus for expanded polystyrene
US3372433A (en) * 1962-12-22 1968-03-12 Inv S Finance Corp Mold clamping apparatus
US3398435A (en) * 1965-10-22 1968-08-27 Inv S Finance Corp Method and apparatus for molding plastics
US3395424A (en) * 1966-06-01 1968-08-06 Inv S Finance Corp Method and apparatus for moulding
US3695575A (en) * 1969-06-18 1972-10-03 Bucher Guyer Ag Masch Injection molding machine having a plasticizing plunger
US3834585A (en) * 1971-02-18 1974-09-10 Standard Oil Co Plastics accumulator having first-in, first-out arrangement
US20100103765A1 (en) * 2008-10-24 2010-04-29 Hornbostel Marc D Liquid injector for silicon production
EP2668017A1 (en) * 2011-01-28 2013-12-04 Husky Injection Molding Systems S.A. Plasticizing system including opposite-facing surfaces for contacting opposite sides of solidified-resin particle
EP2668017A4 (en) * 2011-01-28 2014-10-22 Husky Injection Molding Plasticizing system including opposite-facing surfaces for contacting opposite sides of solidified-resin particle
US8992069B2 (en) 2011-01-28 2015-03-31 Husky Injection Molding Systems Ltd. Plasticizing system including opposite-facing surfaces for contacting opposite sides of solidified-resin particle
IT201600069730A1 (en) * 2016-07-05 2018-01-05 Sipa Progettazione Automaz FUSE PLASTIC INJECTION DEVICE
WO2018007929A1 (en) * 2016-07-05 2018-01-11 S.I.P.A. Societa' Industrializzazione Progettazione E Automazione S.P.A. Method for increasing the injection speed of a plastic injection device
US11400630B2 (en) 2016-07-05 2022-08-02 S.I.P.A. Societa' Industrializzazione Progettazione E Automazione S.P.A. Method for increasing the injection speed of a plastic injection device
JP7375730B2 (en) 2020-11-16 2023-11-08 トヨタ自動車株式会社 Injection molding machine, injection molding device and injection molding method

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