FR2504446A1 - Automated loading of tool for compression moulding thermoplastics - as simple, low pressure alternative to injection moulding - Google Patents
Automated loading of tool for compression moulding thermoplastics - as simple, low pressure alternative to injection moulding Download PDFInfo
- Publication number
- FR2504446A1 FR2504446A1 FR8108176A FR8108176A FR2504446A1 FR 2504446 A1 FR2504446 A1 FR 2504446A1 FR 8108176 A FR8108176 A FR 8108176A FR 8108176 A FR8108176 A FR 8108176A FR 2504446 A1 FR2504446 A1 FR 2504446A1
- Authority
- FR
- France
- Prior art keywords
- piston
- mold
- guide
- press
- thermoplastics
- 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- Withdrawn
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
- B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
- B29C31/04—Feeding of the material to be moulded, e.g. into a mould cavity
- B29C31/042—Feeding of the material to be moulded, e.g. into a mould cavity using dispensing heads, e.g. extruders, placed over or apart from the moulds
-
- 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
-
- 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
- B29C2043/3433—Feeding the material to the mould or the compression means using dispensing heads, e.g. extruders, placed over or apart from the moulds
-
- 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
- B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
- B29C31/04—Feeding of the material to be moulded, e.g. into a mould cavity
- B29C31/06—Feeding of the material to be moulded, e.g. into a mould cavity in measured doses, e.g. by weighting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Robotics (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
PRESSE POUR MATIERES THERMOPLASTIQUES. PRESS FOR THERMOPLASTIC MATERIALS.
La présente invention concerne une presse prévue pour permettre d'obtenir le remplissage du moule par simple gravité. Cette particularité de l'invention présente un grand nombre d'avantages sur le plan de l'économie de construction, d'entretien et de consommation d'énergie. The present invention relates to a press intended to allow filling of the mold by simple gravity. This feature of the invention has a large number of advantages in terms of economy of construction, maintenance and energy consumption.
En effet, ainsi que la description qui suit permet de le démontrer, tous les éléments nécessaires dans les dispositifs à injecter sous pression sont supprimés. De ce fait, un nombre important de pièces et d'organes coûteux étant supprimés le prix d'une telle presse est de beaucoup inférieur à celui des machines conçues pour fonctionner par injection. Il en résulte de toute évidence une plus grande facilité d'entretien en raison de l'absence de tout moyen d'injection sous pression. En outre, la puissance nécessaire est de beaucoup inférieure. Suivant la technique connue, on sait que le moule doit être maintenu fermé malgré la pression qui résulte de l'injection de matière.Dans ces conditions , il est évident que l'énergie nécessaire pour maintenir fermé le moule pendant l'opération d'injection est obligatoirement supérieure à celle déjà requise pour la mise sous pression de la matière. Indeed, as the description which follows makes it possible to demonstrate, all the elements necessary in the devices to be injected under pressure are eliminated. Therefore, a large number of expensive parts and components being eliminated the price of such a press is much lower than that of machines designed to operate by injection. This obviously results in greater ease of maintenance due to the absence of any means of injection under pressure. In addition, the power required is much lower. According to the known technique, it is known that the mold must be kept closed despite the pressure resulting from the injection of material. Under these conditions, it is obvious that the energy required to keep the mold closed during the injection operation is necessarily greater than that already required for pressurizing the material.
Une presse conforme à l'invention ne requiert que peu d'énergie, celle permettant d'amener la matière dosée jusqu'au-dessus du moule, normalement ouvert, dans lequel elle tombe. Âpres quoi, le noyau est abaissé de manière à venir presser la matière encore molle qui prend la forme du moule. La pression nécessaire pour cette opération est de beaucoup inférieure à celle qui est nécessaire pour obtenir la même pièce par injection. A press according to the invention requires only little energy, that making it possible to bring the metered material up to the top of the normally open mold into which it falls. After which, the core is lowered so as to press the still soft material which takes the form of the mold. The pressure required for this operation is much lower than that required to obtain the same part by injection.
En outre, cette presse présente des avantages en ce qui concerne la qualité des pièces moulées. La procédé par injection a frequemment pour conséquence un afflux de bulles macroscopiques avec tendance à un allongement des fibres dent il résulte la création de nappes parallèles préparant des lignes de séparation et de cassure, alors qu'un remplissage de moule conforme à l'invention permet d'obtenir des pièces de constitution plus stable, plus homo gène, le remplissage d'un moule de forme complexe étant parfaitement obtenu par le déversement de la matière molle. In addition, this press has advantages with regard to the quality of the molded parts. The injection process frequently results in an influx of macroscopic bubbles with a tendency to elongate the tooth fibers, resulting in the creation of parallel sheets preparing lines of separation and breakage, while a mold filling in accordance with the invention allows to obtain parts of more stable constitution, more homogeneous, the filling of a mold of complex shape being perfectly obtained by the pouring of the soft material.
On notera enfin, qu'en plus de l'économie d'énergie, de la simplification du fonctionnement et de l'abaissement du coût, l'encombrement d'une telle presse est évidemment réduit du fait de la suppression de toutes les parties nécessaires à l'injection sous pression. Finally, it should be noted that, in addition to saving energy, simplifying operation and lowering the cost, the size of such a press is obviously reduced due to the elimination of all the necessary parts. pressure injection.
On décrira ci-après un mode de réalisation en se référant au dessin annexé à titre d'exemple non limitatif qui représente schématiquement les moyens de moulage suivant l'invention. An embodiment will be described below with reference to the accompanying drawing by way of nonlimiting example which schematically represents the molding means according to the invention.
La référence 1 désigne le bâti de la presse, la référence 2 le moule, la référence 3 le noyau presseur et la référence 4 la matière introduite dans le moule dans les conditions qui vont être indiquées et qui résultent des particularités de l'invention. Reference 1 designates the press frame, reference 2 the mold, reference 3 the pressing core and reference 4 the material introduced into the mold under the conditions which will be indicated and which result from the features of the invention.
La référence 5 désigne le conduit de plastification entouré des moyens de chauffage 6. Le piston 7 est mobile dans le conduit 8 qui en forme le guide. Ce conduit 8 aussi bien que le piston 7 sont animés de mouvements alternatifs longitudinaux qui seront précisés. The reference 5 designates the plasticization conduit surrounded by the heating means 6. The piston 7 is movable in the conduit 8 which forms the guide. This conduit 8 as well as the piston 7 are driven by reciprocating longitudinal movements which will be specified.
Suivant la technique connue, la matière est dosée et amenée dans le conduit de plastification 5. Ce dernier, suivant l'invention, débouche dans le conduit 8 guide du piston 7. Le conduit 5 est transversal au conduit 8. According to the known technique, the material is dosed and brought into the plasticizing conduit 5. The latter, according to the invention, opens into the conduit 8 guide of the piston 7. The conduit 5 is transverse to the conduit 8.
Durant la phase de transfert de la matière de l'un à l'autre des conduits précités, le piston 7 occupe la position indi quée en pointillé et non celle qui est indiquée en 9.During the phase of transfer of the material from one to the other of the abovementioned conduits, the piston 7 occupies the position indicated in dotted lines and not that indicated in 9.
Le ccnduit 8, lui, n'occupe pas la position indiquee sur la figure mais une position en retrait dans laquelle, tout comme le piston 7, il dégage le parcours du noyau presseur 3.The ccnduit 8 does not occupy the position indicated in the figure but a recessed position in which, like the piston 7, it clears the path of the pressing core 3.
Lorsque la matière a été poussée dans le conduit 8,qui luimême se meut vers la gauche de la figure pour occuper alors la position représentée sur celle-ci, le piston 7 poursuivant sa course vient occuper la position indiquée en 9, et il en résulte la chute de la matière 4 dans le moule 2.When the material has been pushed into the conduit 8, which itself moves to the left of the figure to then occupy the position shown thereon, the piston 7 continuing its travel comes to occupy the position indicated in 9, and this results the fall of the material 4 in the mold 2.
Cette phase accomplie, le piston 7 effectue une course en sens inverse et va occuper à nouveau la position représentée en pointillé. This phase accomplished, the piston 7 performs a stroke in the opposite direction and will again occupy the position shown in dotted lines.
Durant cette course du piston 7, le conduit 8 se meut dans le meme sens et après ces deux courses le parcours du noyau presseur 3 est à nouveau dégagé ainsi que l'orifice du conQuit 5 dans le conduit 8. Le moulage peut alors s'effectuer par l'introduction du noyau 3 dans le moule 4, et après la remontée de ce noyau le cycle d'introduction de matière dans le moule peut à nouveau s'effectuer. During this stroke of the piston 7, the conduit 8 moves in the same direction and after these two strokes the path of the pressing core 3 is again released as well as the orifice of the conQuit 5 in the conduit 8. The molding can then carry out by introducing the core 3 into the mold 4, and after the ascent of this core the cycle of introducing material into the mold can again be carried out.
Il est entendu que l'exemple illustré schématiquement qui vient d'être décrit n'est aucunement limitatif et que sans sortir du cadre de l'invention toutes variantes pourront être apportées en ce qui concerne la forme, le nombre et la disposition des éléments constitutifs. It is understood that the schematically illustrated example which has just been described is in no way limiting and that, without departing from the scope of the invention, all variants may be made with regard to the shape, the number and the arrangement of the constituent elements. .
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8108176A FR2504446A1 (en) | 1981-04-24 | 1981-04-24 | Automated loading of tool for compression moulding thermoplastics - as simple, low pressure alternative to injection moulding |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8108176A FR2504446A1 (en) | 1981-04-24 | 1981-04-24 | Automated loading of tool for compression moulding thermoplastics - as simple, low pressure alternative to injection moulding |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2504446A1 true FR2504446A1 (en) | 1982-10-29 |
Family
ID=9257744
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8108176A Withdrawn FR2504446A1 (en) | 1981-04-24 | 1981-04-24 | Automated loading of tool for compression moulding thermoplastics - as simple, low pressure alternative to injection moulding |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2504446A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4971544A (en) * | 1986-11-19 | 1990-11-20 | Bucher-Guyer Ag | Apparatus for charging a mold to produce molded plastic parts |
EP0459321A1 (en) * | 1990-05-26 | 1991-12-04 | Hoechst Aktiengesellschaft | Process for producing articles from long-fibre reinforced thermoplastic pellets |
US5798128A (en) * | 1995-05-16 | 1998-08-25 | ECIA--Equipements et Composants Pour L'Industrie Automobile | Plant for manufacturing structural components made of fibre-reinforced thermoplastic |
GB2503258A (en) * | 2012-06-21 | 2013-12-25 | Oxford Plastic Sys Ltd | Moulding method |
-
1981
- 1981-04-24 FR FR8108176A patent/FR2504446A1/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4971544A (en) * | 1986-11-19 | 1990-11-20 | Bucher-Guyer Ag | Apparatus for charging a mold to produce molded plastic parts |
EP0459321A1 (en) * | 1990-05-26 | 1991-12-04 | Hoechst Aktiengesellschaft | Process for producing articles from long-fibre reinforced thermoplastic pellets |
US5798128A (en) * | 1995-05-16 | 1998-08-25 | ECIA--Equipements et Composants Pour L'Industrie Automobile | Plant for manufacturing structural components made of fibre-reinforced thermoplastic |
GB2503258A (en) * | 2012-06-21 | 2013-12-25 | Oxford Plastic Sys Ltd | Moulding method |
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Legal Events
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---|---|---|---|
ST | Notification of lapse | ||
AR | Application made for restoration | ||
DI | Inadmissibility of an action of restoration |