BR9914867A - Procedimentos de modelação de peças sintéticas e dispositivo para a realização do procedimento - Google Patents

Procedimentos de modelação de peças sintéticas e dispositivo para a realização do procedimento

Info

Publication number
BR9914867A
BR9914867A BR9914867-6A BR9914867A BR9914867A BR 9914867 A BR9914867 A BR 9914867A BR 9914867 A BR9914867 A BR 9914867A BR 9914867 A BR9914867 A BR 9914867A
Authority
BR
Brazil
Prior art keywords
mold
compartment
storage compartment
plunger
storage
Prior art date
Application number
BR9914867-6A
Other languages
English (en)
Inventor
Lothar Stemke
Original Assignee
Lothar Stemke
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 Lothar Stemke filed Critical Lothar Stemke
Priority claimed from PCT/EP1999/008098 external-priority patent/WO2000024560A1/de
Publication of BR9914867A publication Critical patent/BR9914867A/pt

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
    • B29C45/02—Transfer moulding, i.e. transferring the required volume of moulding material by a plunger from a "shot" cavity into a mould cavity
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • B29C43/361—Moulds for making articles of definite length, i.e. discrete articles with pressing members independently movable of the parts for opening or closing the mould, e.g. movable pistons
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/34—Feeding the material to the mould or the compression means
    • B29C2043/3444—Feeding the material to the mould or the compression means using pressurising feeding means located in the mould, e.g. plungers or pistons
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • B29C43/361—Moulds for making articles of definite length, i.e. discrete articles with pressing members independently movable of the parts for opening or closing the mould, e.g. movable pistons
    • B29C2043/3615—Forming elements, e.g. mandrels or rams or stampers or pistons or plungers or punching 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/58—Measuring, controlling or regulating
    • B29C2043/5875—Measuring, controlling or regulating the material feed to the moulds or mould parts, e.g. controlling feed flow, velocity, weight, doses
    • B29C2043/5883—Measuring, controlling or regulating the material feed to the moulds or mould parts, e.g. controlling feed flow, velocity, weight, doses ensuring cavity filling, e.g. providing overflow means
    • 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
    • B29C45/02—Transfer moulding, i.e. transferring the required volume of moulding material by a plunger from a "shot" cavity into a mould cavity
    • B29C2045/025—Transfer moulding, i.e. transferring the required volume of moulding material by a plunger from a "shot" cavity into a mould cavity with the transfer plunger surface forming a part of the mould cavity wall at the end of the plunger transfer movement

Landscapes

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

Abstract

PATENTE DE INVENçãO DE PROCEDIMENTOS DE MODELAçãO DE PEçAS SINTéTICAS E DISPOSITIVOS PARA A REALIZAçãO DO PROCEDIMENTO compreendendo a invenção corresponde ao âmbito do molde original de peças de matéria sintética segundo o tipo do gravado por injecção mediante a utilização de um compartimento de armazenagem que se comunica com o molde para a armazenagem temporal da massa de moldar. A tarefa da invenção consiste em melhorar o processo de gravado por injecção do tipo nomeado de forma a evitar possíveis falhos estruturais e reduzir a despesa com as rectificações mecânicas das peças de trabalho. A tarefa resolveu-se de acordo com a invenção, transportando a massa de moldar derretida antes da injecção a um compartimento de armazenagem dum compartimento de molde a um compartimento de armazenagem cujo volume corresponde virtualmente ao volume do compartimento de molde que tem um molde cilíndrico e está conectado com o compartimento de molde, o compartimento de armazenagem vai dar directamente ao compartimento de molde, e a massa de moldar é transportada por meio de um êmbolo com movimento axial situado no compartimento de armazenagem desde o compartimento de armazenagem até o compartimento de molde. No inicio do processo de injecção o êmbolo encontra-se situado num primeiro ponto morto no qual a parte inferior do êmbolo está rente com a margem do compartimento de armazenagem coincidindo assim com a parede lateral do compartimento de molde, de forma que uma pequena quantidade de massa de moldar acede directamente ao compartimento de molde. Logo após, o êmbolo desliza-se outra vez para dentro do cilindro. O compartimento de armazenagem que aumenta continuamente de volume fica tão cheio de massa de moldar nesta ocasião e virtualmente sem pressão, que a massa de moldar é conduzida continuamente até o núcleo de matéria sintética, até que o êmbolo alcança seu segundo ponto morto. Neste momento termina o abastecimento de massa de moldar. Posteriormente, o êmbolo é conduzido até pouco antes do seu primeiro ponto morto e com isto o compartimento de molde enche-se totalmente de massa de moldar. Para a recuperação das mesmas, os êmbolos são levados até o primeiro ponto morto durante o tempo de inactividade (fig.1).
BR9914867-6A 1998-10-28 1999-10-27 Procedimentos de modelação de peças sintéticas e dispositivo para a realização do procedimento BR9914867A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998149452 DE19849452C2 (de) 1998-10-28 1998-10-28 Dosiervorrichtung
PCT/EP1999/008098 WO2000024560A1 (de) 1998-10-28 1999-10-27 Formgebungsverfahren zum herstellen von kunststoffteilen und vorrichtung zur durchführung des verfahrens

Publications (1)

Publication Number Publication Date
BR9914867A true BR9914867A (pt) 2001-07-17

Family

ID=7885769

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9914867-6A BR9914867A (pt) 1998-10-28 1999-10-27 Procedimentos de modelação de peças sintéticas e dispositivo para a realização do procedimento

Country Status (3)

Country Link
BR (1) BR9914867A (pt)
DE (1) DE19849452C2 (pt)
ZA (1) ZA200103962B (pt)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1174491B (de) * 1959-09-11 1964-07-23 Hanning Robert Stehende Spritzgiessmaschine zur Verarbeitung thermoplastischer Kunststoffe
DE69023002D1 (de) * 1989-10-12 1995-11-16 Seiki Corp Spritzgiessverfahren und -vorrichtung vom typ mit einer nachdruckkammer.
NZ334942A (en) * 1996-09-05 1999-05-28 Lomold International Ltd Production of moulded articles and apparatus for producing moulded articles

Also Published As

Publication number Publication date
DE19849452C2 (de) 2001-08-23
ZA200103962B (en) 2002-01-02
DE19849452A1 (de) 2000-05-11

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Legal Events

Date Code Title Description
B08F Application fees: dismissal - article 86 of industrial property law

Free format text: REFERENTE AS 6A,7A E 8A ANUIDADES

B08K Lapse as no evidence of payment of the annual fee has been furnished to inpi (acc. art. 87)

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 1922 DE 06/11/2007.