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1. WO2022118280 - INJECTION MOLDING APPARATUS AND INJECTION MOLDING METHOD

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Publication Number WO/2022/118280
Publication Date 09.06.2022
International Application No. PCT/IB2021/061316
International Filing Date 03.12.2021
IPC
B29C 45/00 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
B29C 45/17 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
17Component parts, details or accessories; Auxiliary operations
B29C 45/26 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
17Component parts, details or accessories; Auxiliary operations
26Moulds
B29C 45/57 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
17Component parts, details or accessories; Auxiliary operations
46Means for plasticising or homogenising the moulding material or forcing it into the mould
57Exerting after-pressure on the moulding material
CPC
B29C 2045/0039
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
0025Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
0039intermixing the injected material front at the weld line, e.g. by applying vibrations to the melt front
B29C 2045/1712
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
17Component parts, details or accessories; Auxiliary operations
1703Introducing an auxiliary fluid into the mould
1704the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
1711and removing excess material from the mould cavity by the introduced fluid, e.g. to an overflow cavity
1712plastic material flowing back into the injection unit
B29C 2045/1713
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
17Component parts, details or accessories; Auxiliary operations
1703Introducing an auxiliary fluid into the mould
1704the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
1711and removing excess material from the mould cavity by the introduced fluid, e.g. to an overflow cavity
1713using several overflow cavities
B29C 2045/173
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
17Component parts, details or accessories; Auxiliary operations
1703Introducing an auxiliary fluid into the mould
1704the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
173using a plurality of fluid injection nozzles
B29C 45/0025
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
0025Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
B29C 45/0082
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
0082Reciprocating the moulding material inside the mould cavity, e.g. push-pull injection moulding
Applicants
  • SMART MOLD S.R.L. [IT]/[IT]
Inventors
  • LUCCHETTA, Giovanni
  • SCANTAMBURLO, Andrea
  • SORGATO, Marco
Agents
  • MANFRIN, Marta
Priority Data
10202000002986404.12.2020IT
Publication Language English (en)
Filing Language Italian (IT)
Designated States
Title
(EN) INJECTION MOLDING APPARATUS AND INJECTION MOLDING METHOD
(FR) APPAREIL DE MOULAGE PAR INJECTION ET PROCÉDÉ DE MOULAGE PAR INJECTION
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Abstract
(EN) Described is an injection molding apparatus (1) for making an article (P) comprising: - a mold body (10) having an inner surface (11) defining a main cavity (12) apt in use to contain primary molten polymeric material; - a tank (20) in fluid communication with said main cavity (12) by means of a mouth (21) passing through said inner surface (11) and apt in use to contain auxiliary molten polymeric material; - a pressurized gas injector (30), said injector (30) being in communication with said tank (20) and configured to inject said pressurized gas into said tank (20) to displace at least part of said auxiliary molten polymeric material from said tank (20) into said main cavity (12) in such a way as to prevent an entry of said pressurized gas into said main cavity (12). In addition, the invention relates to an injection molding plant for making an article and to a relative injection molding method for making an article. The apparatus, the plant as well as the method for the injection molding of polymeric material according to the invention are particularly conceived and configured to improve the mechanical properties and the aesthetic characteristics of an article to be made at or near the melt lines (J) of the article.
(FR) L'invention divulgue un appareil de moulage par injection (1) pour fabriquer un article (P) comprenant : - un corps de moule (10) ayant une surface interne (11) définissant une cavité principale (12) apte à être utilisée pour contenir un matériau polymère fondu primaire ; - un réservoir (20) en communication fluidique avec ladite cavité principale (12) au moyen d'une embouchure (21) traversant ladite surface interne (11) et apte à être utilisé pour contenir un matériau polymère fondu auxiliaire ; - un injecteur (30) de gaz sous pression, ledit injecteur (30) étant en communication avec ledit réservoir (20) et configuré pour injecter ledit gaz sous pression dans ledit réservoir (20) pour déplacer au moins une partie dudit matériau polymère fondu auxiliaire dudit réservoir (20) dans ladite cavité principale (12) de manière à empêcher une entrée dudit gaz sous pression dans ladite cavité principale (12). De plus, l'invention concerne une installation de moulage par injection pour fabriquer un article et un procédé de moulage par injection associé pour fabriquer un article. L'appareil, l'installation ainsi que le procédé de moulage par injection de matériau polymère selon l'invention sont particulièrement conçus et configurés pour améliorer les propriétés mécaniques et les caractéristiques esthétiques d'un article à fabriquer au niveau ou à proximité des lignes de fusion (J) de l'article.
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