WO1994013444A1 - Procede de moulage par injection - Google Patents

Procede de moulage par injection Download PDF

Info

Publication number
WO1994013444A1
WO1994013444A1 PCT/SE1993/001065 SE9301065W WO9413444A1 WO 1994013444 A1 WO1994013444 A1 WO 1994013444A1 SE 9301065 W SE9301065 W SE 9301065W WO 9413444 A1 WO9413444 A1 WO 9413444A1
Authority
WO
WIPO (PCT)
Prior art keywords
mould parts
mould
pressure
outer casing
cavity
Prior art date
Application number
PCT/SE1993/001065
Other languages
English (en)
Inventor
Ernst Axelsson
Axel Svenson
Original Assignee
Recon Pharmaceutical 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 Recon Pharmaceutical Ltd. filed Critical Recon Pharmaceutical Ltd.
Priority to AU56639/94A priority Critical patent/AU5663994A/en
Publication of WO1994013444A1 publication Critical patent/WO1994013444A1/fr
Priority to SE9501984A priority patent/SE507125C2/sv

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/24—Producing shaped prefabricated articles from the material by injection moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/0029—Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several parts
    • 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
    • B29C45/26—Moulds

Definitions

  • the invention relates to a method in injection mould ⁇ ing in a mould cavity, which is defined by fitted mould parts enclosed in an outer casing keeping the mould parts together.
  • DE-C-397 198 discloses a method for moulding of porcelain material in a mould box, in which a mould for the moulding which is to be produced by the porcelain material is enclosed.
  • the mould comprises three parts two of which are made in one piece while one part is composed of three parts.
  • the mould parts are enclosed in a cavity in the mould box.
  • FR-A-2 608 963, US-A-2 097 658, US-A-3 764 101 and US-A- 4 066 236 show moulds for casting complicated objects, wherein the moulds are composed of several parts.
  • injection moulding the construction and design of the moulds are of great importance for the quality of the products as well as the production economy.
  • split moulds are connected with the drawback that the joints between the mould parts give rise to unattractive and in many cases unacceptable burr on the injection moulded product.
  • the object of the invention is to overcome this pro- blem, and according to the invention this object is achieved by a method with the characterizing features of claim 1.
  • Fig. 1 is a perspective view of the lower part of a device which is used in the method according to the inven ⁇ tion having the upper part indicated by a dash- and dott- line
  • Fig. 2 is a perspective view of the mould parts which are used in the method according to the invention
  • Fig. 3 is a perspective view of an example of an object which is to be injection moulded by means of the method according to the invention
  • Fig. 4 is an exploded perspective view of the mould parts which are to be used in the injection moulding of the object in Fig. 3,
  • Fig. 5 is a perspective view of the mould parts fitted together, the object in Fig. 3 being indicated by a dotted line, and Fig. 6 is a vertical cross sectional view of the mould device for working of a modification of the method according to the invention.
  • a device to be used in the method of injection moulding according to the invention comprising an outer casing 10 with a cavity 11 and an axial interface 12.
  • the cavity 11 mould parts consist of elements comprising e.g. discs, halves, and bars which when fitted together, have an outer shape with axial and radial dimensions corresponding to the measures of the cavity 11.
  • This outer shape may for example be circular, hexagonal, square, or rectangular.
  • mould cavities 15 are easily provided within the mould parts 13 by means of conventional workshop practice.
  • the mould parts 13 having radial and axial interfaces 16 and 17 which are parallel with one or the other, respectively of two planes perpendicular to each other are subsequently placed within the cavity 11 and held pressed against each other at the radial interfaces 16 between an injection nozzle, acting at 18, and a support surface at 19 formed by the outer casing.
  • the axial interfaces 17 are held pressed against each other by a clamp tie pressure exerted against the outer casing at 20 in order to press the parts together at the interface 12.
  • the interfaces are made with great accuracy as they are especially exposed to damages at the closing of the mould due to remaining burrs.
  • the material of the mould parts is metal or metal alloy, preferably tool steel and can be varied depending on the injection pressures applied. It is possible to provide cores in the mould in order to form an apperture in the object which is to be moulded.
  • the pressure plates of the injection moulding device are shown at 20. Between the pressure plates the outer casing 10 with the interface 12 thereof is provided. The injection nozzle is to be applied at 18. The mould parts 13 are pro ⁇ vided within the outer casing.
  • An additional part 21 on the outer casing is fixed thereto by means of a screw connection 22, and a steel body is inserted into a cavity within the additional part, said steel body comprising a cylindrical portion 23 and a conical portion 24.
  • the additional part 21 has an interface 12' coinciding with the interface 12.
  • the cylindrical portion 23 abuts with the end surface thereof the mould parts 13.
  • the angle V of the conical portion should be larger than the angle of an irreversable wedge (usually at least 6°).
  • the conical portion is 0,01 - 0,02 mm larger than the corresponding conical cavity within the additional part 21, such that when a clamp tie pressure is applied between the pressure plates 20, said pressure is changed to an axial pressure against the mould parts by means of wedge action at the conical portion 24, said mould parts being compressed between the body 23, 24 and a support surface 25 in the outer casing 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

Procédé de moulage par injection dans une cavité de moule qui est définie par des parties (13) de moule assemblées enfermées dans une enveloppe (10) externe qui maintient les parties de moule soudées.
PCT/SE1993/001065 1992-12-11 1993-12-10 Procede de moulage par injection WO1994013444A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU56639/94A AU5663994A (en) 1992-12-11 1993-12-10 A method in injection moulding
SE9501984A SE507125C2 (sv) 1992-12-11 1995-05-31 Förfarande vid formsprutning

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9203722-5 1992-12-11
SE9203722A SE9203722D0 (sv) 1992-12-11 1992-12-11 Gjutsystem

Publications (1)

Publication Number Publication Date
WO1994013444A1 true WO1994013444A1 (fr) 1994-06-23

Family

ID=20388090

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1993/001065 WO1994013444A1 (fr) 1992-12-11 1993-12-10 Procede de moulage par injection

Country Status (3)

Country Link
AU (1) AU5663994A (fr)
SE (1) SE9203722D0 (fr)
WO (1) WO1994013444A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2291056A1 (es) * 2004-02-04 2008-02-16 Jaime Enrique Jimenez Sanchez Procedimiento de fabricacion por inyeccion de termoplasticos de correas de encofrado para forjados planos y encofrado asi obtenido.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE397198C (de) * 1919-01-28 1924-06-18 Richard Sprenger Verfahren zum Pressen von Formstuecken aus keramischen Massen, besonders aus Porzellanmasse
US2097658A (en) * 1934-09-22 1937-11-02 American Metal Co Ltd Apparatus to be used in casting metal
US3764101A (en) * 1971-06-01 1973-10-09 Scovill Manufacturing Co Kitchen mixer impeller and mold for making it
US4066236A (en) * 1976-06-25 1978-01-03 Beatrice Foods Co. Cube corner type retroreflector bodies and molds made therewith
FR2608963A1 (fr) * 1986-12-24 1988-07-01 Rogez Patrice Moule pour la realisation de pieces de grandes dimensions ainsi que son procede de fabrication et la piece obtenue

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE397198C (de) * 1919-01-28 1924-06-18 Richard Sprenger Verfahren zum Pressen von Formstuecken aus keramischen Massen, besonders aus Porzellanmasse
US2097658A (en) * 1934-09-22 1937-11-02 American Metal Co Ltd Apparatus to be used in casting metal
US3764101A (en) * 1971-06-01 1973-10-09 Scovill Manufacturing Co Kitchen mixer impeller and mold for making it
US4066236A (en) * 1976-06-25 1978-01-03 Beatrice Foods Co. Cube corner type retroreflector bodies and molds made therewith
FR2608963A1 (fr) * 1986-12-24 1988-07-01 Rogez Patrice Moule pour la realisation de pieces de grandes dimensions ainsi que son procede de fabrication et la piece obtenue

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2291056A1 (es) * 2004-02-04 2008-02-16 Jaime Enrique Jimenez Sanchez Procedimiento de fabricacion por inyeccion de termoplasticos de correas de encofrado para forjados planos y encofrado asi obtenido.

Also Published As

Publication number Publication date
AU5663994A (en) 1994-07-04
SE9203722D0 (sv) 1992-12-11

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