WO1996003266A1 - Machine a mouler pour la realisation de pieces moulees sous pression ou par poussee d'un materiau, et equipement destine a de telles machines a mouler - Google Patents
Machine a mouler pour la realisation de pieces moulees sous pression ou par poussee d'un materiau, et equipement destine a de telles machines a mouler Download PDFInfo
- Publication number
- WO1996003266A1 WO1996003266A1 PCT/FR1995/000956 FR9500956W WO9603266A1 WO 1996003266 A1 WO1996003266 A1 WO 1996003266A1 FR 9500956 W FR9500956 W FR 9500956W WO 9603266 A1 WO9603266 A1 WO 9603266A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plate
- molds
- support table
- mold
- twin
- 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.)
- Ceased
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
- B29C45/03—Injection moulding apparatus
- B29C45/04—Injection moulding apparatus using movable moulds or mould halves
- B29C45/0408—Injection moulding apparatus using movable moulds or mould halves involving at least a linear movement
- B29C45/0416—Injection moulding apparatus using movable moulds or mould halves involving at least a linear movement co-operating with fixed mould halves
-
- 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
- B29C45/83—Lubricating means
Definitions
- the invention relates to a molding machine for producing parts molded under pressure or by pushing a material, of the type comprising a fixed plate, a mobile plate, means for moving the mobile plate relative to the fixed plate, and at least two half-molds arranged to be carried each by one of the plates, and to constitute a mold after closing. It extends to equipment intended to be mounted on a conventional molding machine.
- machines have been designed for injection molding of a plastic material, such as for example described in US Patents 3,091,809, US 4,379,685, DE 2,849,604, EP 536,883, JP 6.015.684 and DE 2.062.432, comprising, associated with one of the fixed or movable plates, two identical twin half-molds, and means for moving these twin half-molds adapted to bring them alternately either opposite each other tray for the injection of the material, or in a position offset laterally with respect to this other tray for the ejection of the molding.
- Such molding machines make it possible to reduce the production cycle because, simultaneously with the production of a part, by injection of a material, the previously produced part is ejected.
- the invention aims to improve this type of molding machine and has the essential objective of providing a molding machine, on the one hand, whose time of the molded parts production cycle is optimized and, on the other hand, whose means for holding the twin half-molds are very simplified and make it possible to minimize the stresses to which the structure of this molding machine is subjected, giving the latter optimum reliability.
- Another objective of the invention is to provide a molding machine which optimally facilitates any intervention on the half-molds, and in particular on the molded parts before ejection of the latter.
- the invention relates to a molding machine for producing parts molded under pressure or by pushing a material, comprising:
- this molding machine is characterized in that it comprises:
- a horizontal support table arranged in cantilever with respect to said plate and suitable for carrying the twin half-molds, said support table and said twin half-molds comprising positioning means consisting of centering pins projecting by relative to the support table, and in orifices of length greater than that of the centering pins along an axis parallel to the axis of movement of the movable plate, formed on the underside of the semi-molds which are twinned and capable of each housing a said centering pins,
- such a molding machine makes it possible to carry out, in masked time, the cleaning and lubrication operations of the half-molds, which are compulsory for such a type of machine, and thus leads to a significant increase in the production cycles of a part. molded.
- the spraying means advantageously comprise:
- At least one spraying boom carried by the support table associated with the fixed or movable plate and arranged so as to be positioned between the twin mold halves,
- At least two spray bars arranged on either side of the other mobile or fixed plate.
- the spraying means advantageously comprise, for each of said support tables, at least one ramp spraying carried by the latter and arranged so as to be positioned between the twin semi-molds.
- the spray bars associated with a tray are therefore arranged to be opposite a half-mold carried by the plate vis-à-vis when moving the (or) table (s) -sup ⁇ ort (s), and ensure the cleaning and lubrication of these half - molds in masked time after extraction of the molded part or extraction of the molding according to the half-mold considered.
- the means for positioning the semi-molds paired on the table (s) -support (s) are extremely simple since these half-molds are simply placed without the addition of any fixing device , and however ensure perfect relative positioning of said fixed and mobile half-molds, while allowing adjustment on the order of a few tenths of a millimeter, for example, during closure, thanks to the elongated shape of the holes in the underside of the twin mold halves.
- the molding machine comprises:
- the machine according to the invention comprises two ejection assemblies arranged on either side of a plate, which on the one hand allow the ejection of the molding in masked time, and on the other hand facilitate access to the assemblies ejection.
- the ejectors remain in the advanced position during the translation of the support table towards the injection position, which makes it possible to lubricate said ejectors.
- this space can be minimized (between 50 and 100 mm) which leads to a saving of time during opening and closing, and to an optimization of the production cycle time.
- the molding machine comprises two machining stations arranged on either side of a plate opposite the ejection assemblies secured to the other plate, adapted to allow carrying out machining operations of the molded parts, before ejection, in the ejection position of the half-molds.
- the means for guiding each half-mold paired along the associated plate comprise two slides, high and low, projecting frontally with respect to said plate, and extending laterally on either side of the latter over a length equivalent to the stroke of the support table, said slides being arranged to accommodate two longitudinal slides of conjugate shape, formed in the upper part and in the lower part of each half-mold, and the upper slide comprising two longitudinal end sections which can be dismantled so as to allow the half-molds to be removed in the ejection position of the latter.
- Such slides make it possible to perfectly guide the twin half-molds during translations of the table (s) -support (s). In addition, they make it possible to contain the force applied to the molding during ejection, acting as means for holding the half-molds in the ejection position of the latter. Therefore, the design of these slides avoids having to fix the half-mold in order to contain this effort, unlike current molding machines. In addition, the removal of a semi-mold paired for its change or any other operation is very easy because it simply requires dismantling one of the end sections of the upper slide.
- the molding machine comprises means for temporarily holding each semi-mold paired against the associated plate, comprising locking fingers associated with vertical displacement means integral with said plate, able to come lodge in conjugate housings provided in the lower and upper faces of each twin mold half.
- each tray associated with a support table advantageously has a front wall.
- housings incorporating a retractable element urged by elastic means capable of urging the mold halves in a direction tending to detach the latter from the plate.
- the purpose of this arrangement is to take off the half-molds relative to the plate after injection, thus replacing these half-molds in good translation conditions.
- the molding machine comprises, associated with each support table, elastic stop means capable of damping said support table at the end of the stroke.
- Such elastic stop means provide, by relying on the support table, on the one hand, a function of end of stroke damper and, on the other hand, a function of starting assistance.
- the desired travel time of the support table being of the order of a few seconds for a distance of the order of a meter and a transported load of the order of several hundred kilograms, such means of stop contribute to fulfill this objective because they participate in obtaining a high starting torque and a significant damping.
- stop means can be associated with a pawl controlled simultaneously in order to avoid a rebound effect, and also with position detectors making it possible to locate the position of the support table and therefore half - twin molds whatever their dimensions.
- the invention extends to equipment for a conventional molding machine comprising in combination:
- a horizontal support table intended to be arranged in cantilever with respect to said plate, provided with means for positioning two identical half-molds, said to be paired, adapted so that said half-molds are arranged at a distance from one the other, and aligned in a plane parallel to that of the plate, said positioning means consisting of centering pins projecting relative to the support table and of orifices of length greater than that of the centering pins along an axis parallel to the axis moving the movable plate, arranged on the underside of the twin mold halves and each capable of accommodating one of said centering pins,
- FIG. 1 is a block diagram of a first embodiment of a molding machine according to the invention
- FIG. 2 is a block diagram of a second embodiment for making a molding machine according to the invention
- Figure 3 is a block diagram of a third embodiment of a molding machine according to the invention.
- FIG. 4 is a longitudinal section through a vertical plane A of the molding machine according to the first embodiment,.
- FIG. 5 is a top view thereof,
- FIG. 6 is a side view thereof,. and Figure 7 is a cross section through a vertical plane B.
- the molding machines shown diagrammatically in FIGS. 1 to 3 all conventionally comprise a fixed plate 1, and a movable plate 2 capable of moving relative to the fixed plate 1.
- the fixed plate 1 carries a fixed half-mold 3, while the mobile plate 2 is associated with a support table 4 able to move according to a direction orthogonal to the direction of movement of said movable plate 2.
- this support table 4 carries two identical half-molds 5, 6 arranged so as to come alternately opposite the movable plate 2 during the movements of said support table 4 .
- the movable plate 2 carries a fixed half-mold 7, while the fixed plate 1 is associated with a support table 4 moving transversely in front of said fixed plate.
- this support table 4 carries two identical half-molds 8, 9 arranged so as to come alternately opposite the fixed plate 1, during the movements of said support table.
- the fixed 1 and mobile 2 plates are both associated with support tables 10, 11 each carrying two identical half-molds 12, 13 and 14, 15, the two pairs of half-molds 12, 13, and 14, 15 being arranged symmetrically with respect to the longitudinal axis of the machine so as to allow interventions on the two half-molds (12, 15 in the example) being in position ejection.
- FIGS. 4 to 7 show in more detail a molding machine in accordance with that shown diagrammatically in FIG. 1.
- This molding machine comprises, conventionally, a frame 16 mounted on a base 57, and carrying a fixed plate 1 associated with injection means 17 and provided with fixing means (not shown) of a fixed half-mold 3.
- each of these fixed 1 and mobile 2 plates is equipped with a frame 19, 20 extending it on either side by approximately 1 meter.
- the purpose of the frame 20 associated with the movable plate 2 is on the one hand to support, outside the machine frame 16, a chassis 21 supporting a translation table 22, and on the other hand to receive two ejection assemblies.
- the frame 19 associated with the fixed plate 1 aims to carry machining stations.
- this frame 19 is supported, towards each of its ends, by an upright extending between said frame and the base 57 and secured to the latter, and the function of which is to ensure the transverse stability of this frame 19.
- these frames 19, 20 are made from tubular profiles.
- the chassis 21 is itself made up of a ribbed box of mechanically welded steel connected to the movable plate 2 and to the frame 20 by screwing thereon, and arranged so as to extend in overhang relative to the plane said movable plate and frame.
- This chassis 21 rests, moreover, on the machine frame 16 by means of adjustable sliding pads 21a identical to those conventionally fitted to the movable plate 2, and moving on the sliding surfaces 16a of the machine frame 16 used for displacement of said movable plate.
- This chassis 21 is also provided with reservations allowing the passage of the guide columns 18 of the movable plate 2.
- the upper part of this chassis 21 carries two roller guide rails, such as 24, extending longitudinally on said chassis.
- the translation table 22 has dimensions defined as a function of the standard dimensions of molds, so as to be able to carry two half-molds 5, 6.
- this table 22 includes centering pins such as 23 of oblong shape, making protrusion on said plate, and arranged with a standard spacing adapted so that each pin comes to be housed in an orifice such as 5a formed on the underside of the half-molds 5, 6.
- These orifices 5a also have a shape elongated with a length greater than that of the pins 23 along an axis parallel to the axis of movement of the movable plate 2, so as to allow an adjustment of the position of the half-mold 5, 6 when the machine is closed.
- the translation table 22 comprises, on the underside, ball pads such as 25 capable of cooperating with the guide rails 24.
- the translational drive means of this table 22 comprise a worm / nut 26 system, said worm being driven in rotation by means of a motor 27 and a belt reducer 28.
- elastic stop means such as 29, consisting for example of short stroke jacks, are adapted to serve as a stop for the translation table 22 at the end of movement of the latter.
- the frame 20 associated with the movable plate 2 carries, in addition, two ejection assemblies arranged on either side of said plate and each comprising at least one ejection cylinder such as 30 disposed horizontally and, mounted on the rod of this cylinder 30, a plurality of ejection tails, such as 31, the number and arrangement of which are adapted, in a conventional manner, to the molding to be produced.
- the movable plate 2 further comprises means for guiding the half-molds 5, 6 and for holding the latter in their ejection position.
- These guiding and holding means comprise two parts 32, 33 for upper and lower guide secured to the front face 2a of the movable plate, and each forming a spoiler 32a, 33a, oriented respectively downwards and upwards.
- These spoilers 32a, 33a of rectangular section are adapted to delimit a guide groove 34, 35, with the front face 2a of the plate, and comprise, opposite said front face, a rear face coated with a sliding material 36.
- these guide pieces 32, 33 extend over a length equivalent to the length of the frames 19 and 20.
- the upper guide piece 32 is split longitudinally into three sections: a fixed central section 32a and two sections ends such as 32b, arranged vertically above the removable ejection assemblies 30, intended to allow the twin half-molds 5, 6 to be changed. With a view to guiding them, the half-molds 5,
- the movable plate 2 comprises means for temporarily holding the half-molds 5, 6 able to hold said half-molds pressed against the front face 2a of said plate.
- These holding means consist of locking fingers such as 39, 40 carried by jacks such as 41 able to move them vertically, said locking fingers being arranged so as to cooperate with conjugate housings such as 42, formed in the faces. lower and upper half molds 5, 6.
- these locking fingers 39, 40 have a trapezoidal section adapted to generate a retreat of half-molds 5, 6 in the direction of the movable plate 2, as and when these fingers are introduced into the housings 42, 43 vis-à-vis said half-molds.
- the movable plate 2 further comprises housings such as 45 formed in its front face, housing a ball 46 associated with a spring 47 arranged to urge said ball so that it takes off the half-molds 5, 6 relatively to said plate, once the locking fingers 39, 40 retracted, so as to replace said half-molds in good translation conditions.
- the translation table 22 carries, moreover, a vertical spraying ramp 48 arranged so as to be between the two half-molds 5, 6 and adapted to ensure the cleaning and the lubrication of the fixed half-mold 3, during movement. of this translation table.
- This translation table 22 further comprises two removable protective flaps 49, 50 each disposed above one end of said table and intended to provide protection against accidental projections of material during injection.
- the frame 19 also carries two spray bars 53, 54 arranged on either side of the fixed plate 1 and adapted to ensure the cleaning and the lubrication of the half-molds 5, 6, when the latter move towards their position. injection.
- these two spray booms 53, 54 may possibly be supplemented by booms adapted to perfect the cleaning and the lubrication of the mold halves 5, 6 after ejection, and before the translation of the latter.
- This frame 19 carries, finally, two machining stations 55, 56 (tapping machine, drill ...) arranged so as to be located opposite the half-molds 5, 6, in the ejection position of the latter.
- the molding machine according to the invention is equipped with rotating brackets as shown diagrammatically at 57 arranged on either side thereof in order to allow the mold halves 5, 6 arranged in their position to be changed. ejection, and the fixed half-mold 3.
- the molding machine as described above makes it possible to carry out the operations of ejection of the molds, evacuation of the latter, cleaning and lubrication of the half-molds 3, 5, 6 in masked time. Indeed, while one half-mold 5, 6 is in the injection position, the other half-mold 6, 5 is in the ejection position. In addition, the cleaning and lubrication operations take place, for the half-molds 5, 6, after ejection during their movement, by means of the ramps 53,
- This design allows a significant saving on the time of a production cycle. For example, the time of a cycle can be reduced significantly by half compared to current machines.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU29848/95A AU2984895A (en) | 1994-07-21 | 1995-07-18 | Moulding machine for the production of pressure or push moulded articles and equipment for such moulding machines |
| EP95925896A EP0771261A1 (fr) | 1994-07-21 | 1995-07-18 | Machine a mouler pour la realisation de pieces moulees sous pression ou par poussee d'un materiau, et equipement destine a de telles machines a mouler |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9409143A FR2722714B1 (fr) | 1994-07-21 | 1994-07-21 | Machine a mouler pour la realisation de pieces moulees sous pression ou par poussee d'un materiau, et equipement destine a de telles machines a mouler |
| FR94/09143 | 1994-07-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1996003266A1 true WO1996003266A1 (fr) | 1996-02-08 |
Family
ID=9465697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1995/000956 Ceased WO1996003266A1 (fr) | 1994-07-21 | 1995-07-18 | Machine a mouler pour la realisation de pieces moulees sous pression ou par poussee d'un materiau, et equipement destine a de telles machines a mouler |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0771261A1 (fr) |
| AU (1) | AU2984895A (fr) |
| CA (1) | CA2194693A1 (fr) |
| FR (1) | FR2722714B1 (fr) |
| WO (1) | WO1996003266A1 (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6652064B2 (en) | 2000-04-20 | 2003-11-25 | Hewlett-Packard Development Company, L.P. | Method for improving image quality on plots |
| DE102018221309B4 (de) | 2018-07-31 | 2021-10-07 | Nichietsu Inc. | Formtransportführungsvorrichtung in einer Spritzgießmaschine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3091809A (en) * | 1960-12-22 | 1963-06-04 | Trueblood Inc | Plastic injection machine |
| DE2062432A1 (de) * | 1969-12-23 | 1971-07-01 | Int Press Dev Est | Spritzgussmaschine mit Mehrfach formen zum Formpressen von Gummi und Plastikartikeln und Ähnlichem |
| DE2849604A1 (de) * | 1978-11-15 | 1980-05-29 | Linde Ag | Spritzgiessverfahren |
| US4379685A (en) * | 1980-02-05 | 1983-04-12 | Canyon Corporation | Injection molding machine |
| EP0536883A1 (fr) * | 1991-10-10 | 1993-04-14 | Gencorp Inc. | Machine de moulage par injection et son assemblage à navette |
| JPH0615684A (ja) * | 1992-01-31 | 1994-01-25 | Victor Co Of Japan Ltd | デイスク射出成形用金型装置 |
-
1994
- 1994-07-21 FR FR9409143A patent/FR2722714B1/fr not_active Expired - Fee Related
-
1995
- 1995-07-18 WO PCT/FR1995/000956 patent/WO1996003266A1/fr not_active Ceased
- 1995-07-18 AU AU29848/95A patent/AU2984895A/en not_active Abandoned
- 1995-07-18 CA CA002194693A patent/CA2194693A1/fr not_active Abandoned
- 1995-07-18 EP EP95925896A patent/EP0771261A1/fr not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3091809A (en) * | 1960-12-22 | 1963-06-04 | Trueblood Inc | Plastic injection machine |
| DE2062432A1 (de) * | 1969-12-23 | 1971-07-01 | Int Press Dev Est | Spritzgussmaschine mit Mehrfach formen zum Formpressen von Gummi und Plastikartikeln und Ähnlichem |
| DE2849604A1 (de) * | 1978-11-15 | 1980-05-29 | Linde Ag | Spritzgiessverfahren |
| US4379685A (en) * | 1980-02-05 | 1983-04-12 | Canyon Corporation | Injection molding machine |
| EP0536883A1 (fr) * | 1991-10-10 | 1993-04-14 | Gencorp Inc. | Machine de moulage par injection et son assemblage à navette |
| JPH0615684A (ja) * | 1992-01-31 | 1994-01-25 | Victor Co Of Japan Ltd | デイスク射出成形用金型装置 |
Non-Patent Citations (2)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 18, no. 220 (M - 1595) 20 April 1994 (1994-04-20) * |
| PATENT ABSTRACTS OF JAPAN vol. 4, no. 57 (M - 9)<539> 26 April 1980 (1980-04-26) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6652064B2 (en) | 2000-04-20 | 2003-11-25 | Hewlett-Packard Development Company, L.P. | Method for improving image quality on plots |
| DE102018221309B4 (de) | 2018-07-31 | 2021-10-07 | Nichietsu Inc. | Formtransportführungsvorrichtung in einer Spritzgießmaschine |
| US11220031B2 (en) | 2018-07-31 | 2022-01-11 | Nichietsu Inc. | Mold conveyance guide apparatus in injection molding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2194693A1 (fr) | 1996-02-08 |
| EP0771261A1 (fr) | 1997-05-07 |
| FR2722714B1 (fr) | 1996-08-30 |
| AU2984895A (en) | 1996-02-22 |
| FR2722714A1 (fr) | 1996-01-26 |
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