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WO2018222089A1 - Dispositif de formation thermique d'un polymère fondu ou d'une résine au moyen de moulage par injection [au moyen de moulage par injection wipopearl *par coulage sous pression] et moule d'injection [moule d'injection wipopearl *moule de coulée] pour ledit dispositif - Google Patents

Dispositif de formation thermique d'un polymère fondu ou d'une résine au moyen de moulage par injection [au moyen de moulage par injection wipopearl *par coulage sous pression] et moule d'injection [moule d'injection wipopearl *moule de coulée] pour ledit dispositif Download PDF

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Publication number
WO2018222089A1
WO2018222089A1 PCT/RU2018/000355 RU2018000355W WO2018222089A1 WO 2018222089 A1 WO2018222089 A1 WO 2018222089A1 RU 2018000355 W RU2018000355 W RU 2018000355W WO 2018222089 A1 WO2018222089 A1 WO 2018222089A1
Authority
WO
WIPO (PCT)
Prior art keywords
injection mold
mold
melting chamber
piston
polymer
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
Application number
PCT/RU2018/000355
Other languages
English (en)
Russian (ru)
Inventor
Александр Андреевич МАКСИМОВ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2018222089A1 publication Critical patent/WO2018222089A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould

Definitions

  • the group of inventions relates to equipment for processing plastics or resins and can be used in medicine, as well as in food, chemical and other industries.
  • injection melting press for molding molten polymer and / or resin by injection molding (injection press), including a forming chamber of a cylindrical shape and a piston located inside this chamber with the possibility of movement.
  • the piston divides the cylinder into two chambers: retraction and extrusion.
  • the pump and the device for creating pressure along the axis are connected to the extrusion chamber.
  • the sensor measures the pressure in the extrusion chamber.
  • the controller receives signals from the sensor and controls the pump.
  • the pump delivers hydraulic fluid to the extrusion chamber to squeeze and inject (inject) the polymer / resin, placed in the cartridge of easily deformable material, such as aluminum foil, into the cavity of the injection mold by means of a piston.
  • the controller stops the pump when the pressure in the extrusion chamber reaches the set shutdown level.
  • the axial pressure generating device creates a back pressure on the liquid in the extrusion chamber after the controller stops the pump to provide excess pressure on the injected polymer.
  • a device for thermal molding of molten polymer / resin by injection under pressure consisting of a cylindrical molding chamber, inside of which a piston is placed on the rod with the ability to move along the chamber axis from the inlet to the outlet, while the piston divides the molding the chamber into two cavities: the rod cavity and the piston cavity.
  • a disc is located between the piston and the outlet of the molding chamber to protect the piston surface from polymer / resin melt.
  • the outlet of the molding chamber is connected to the volume of the cavity of the injection mold into which the molten polymer is fed by moving the piston.
  • a pressure sensor connected to the input of the controller containing a microprocessor connected to a device for moving the piston is connected to the piston cavity of the molding chamber (RU133772, ⁇ 29 ⁇ 45/12, 2013).
  • This technical solution is taken as a prototype.
  • a distinctive feature of the prototype is that the piston interacts with the polymer directly or through a disk with the ability to extrude the polymer / resin through the outlet from the volume of the molding chamber into the cavity of the injection mold, while the roughness of the outer surface of the piston and the inner surface of the molding chamber to move it is in the range of values 1, 0-10-6 mm ⁇ Ra ⁇ l, 0 mm, where Ra is the arithmetic mean deviation.
  • the gap between the outer surface of the piston and the inner surface of the molding chamber for its movement is in the range of 2.0-10-6 mm ⁇ h ⁇ l, 0 mm.
  • the injection mold for supplying polymer to the cavity volume has at least one channel opening connecting the volume of the injection mold cavity with a vacuum device.
  • To the volume of the cavity of the injection mold is connected via at least one pressure sensor connected to the controller.
  • Electric heaters and temperature sensors are placed outside the molding chamber and the injection mold, while the temperature sensors of the molding chamber and the injection mold are connected to a controller connected to a vacuum device and devices for regulating the current value in electric heaters.
  • Known injection mold (RU133772, B29C 45/12, 2013), including a heated housing with an inlet and shutter elements that overlap the inlet and channels of the means of vacuum.
  • the mold is equipped with a heater, which greatly complicates and increases the time of the preparation process for casting, which increases the time of the technological cycle of the entire casting process.
  • Injection mold consists of a hollow body with a vertical plane of the connector. Moreover, holes are made on the detachable parts of the housing for loading the forming material into the mold. This design was chosen as a prototype.
  • the disadvantages of the prototype injection mold are the following factors: - when preparing the mold, it is necessary to manufacture additional gate channels for air removal, which complicates the preparation of the mold for casting and its unpacking after casting; - the enclosed space of the mold leaves the possibility of the formation of porosity of the product due to incomplete exit of air from the mold during casting;
  • the form has an angular shape, massive dimensions and weight, which is not convenient during operation;
  • An object of the present invention is to provide a device for thermally molding a molten polymer or resin by injection molding, as well as an injection mold devoid of these drawbacks.
  • the technical result is to improve performance and improve product quality.
  • the proposed device for thermal molding of molten polymer or resin by injection molding consisting of a cylindrical melting chamber equipped with a heater, inside which a piston is placed with the possibility of movement along the chamber axis, and an injection mold.
  • the internal cavity of the injection mold by means of a sealed detachable connection communicates with the internal cavity of the melting chamber.
  • the melting chamber with an injection mold is located inside a detachable sealed enclosure, the internal cavity of which is connected to the foreline pump.
  • the internal cavity of the injection mold communicates with the internal cavity of the sealed housing, and the melting chamber, piston and injection mold are made of aluminum-containing alloy.
  • the surface of the injection mold adjacent to the melting chamber at the place of detachable connection be made in the form of a confuser
  • the outer surface of the piston in contact with polymer or resin should be made in the form of a cone and congruent surface of the confuser.
  • the piston can be made integral and contain cylindrical and conical detachable parts provided with a circumference a gasket made of graphite-containing or glass-containing insulating material.
  • the melting chamber, the cylindrical and conical parts of the piston and the injection mold be made of duralumin.
  • an injection mold in the form of a cylinder consisting of a housing with a vertical plane of the connector, upper and lower covers, together creating a cavity for placing the forming material inside the mold. Moreover, holes are made on the detachable parts of the housing for loading the forming material into the mold.
  • a distinctive feature of the proposed injection mold is that the lower cover is made with an opening for supplying molten polymer and with quick-release means for attaching to the melting chamber, the upper cover is made with an opening for the exit of excess polymer. Both covers along the perimeter are placed in annular grooves made in the housing, and the detachable parts of the housing are combined by at least one adjustable crimp clamp located on the outer surface of the housing.
  • the surfaces of the lids facing the inner cavity of the mold be tapered.
  • quick-detachable fastening means be made in the form of a nozzle cantilever-made on the lid, in the wall of which at least one bayonet groove is made.
  • the implementation of the lower cover of the injection mold with an opening for supplying molten polymer and with a quick-detachable means of attachment to the melting chamber, and the upper cover with an opening for the exit of excess polymer allows not to produce air gates when forming the blank of the future product and prevents the occurrence of porosity of the product caused by the remaining air in the cavity forms.
  • the placement of both covers along the perimeter in the annular grooves made in the housing with the simultaneous union of the detachable parts of the housing with at least one adjustable crimp clamp located on the outer surface of the housing allows you to quickly and effortlessly disassemble the form, clean its surfaces and the resulting product from residues forming material. All of these factors increase the quality of products, greatly simplify the process and provide a large guarantee of high-quality full casting of the product and polymer savings.
  • FIG. 1 is a schematic cross-sectional view of an apparatus for thermally molding a molten polymer or resin by injection molding
  • FIG. 3 is a plan view of the detachable part of the mold body;
  • FIG. 4 an enlarged external element of the annular groove, in FIG. 5 is a cross-sectional view of the detachable part of the mold body;
  • FIG. 6 the appearance of the bottom cover of the injection mold
  • Fig.7 is a cross section of the lower cover of the injection mold
  • FIG. 8 and 9 are a transverse section and an external element of the upper mold cover.
  • the proposed device consists of a heater 1, a melting chamber 2, a piston 3, an injection mold body 4, a quick-detachable fastener 5, a detachable sealed housing 6, a foreline pump 7, a confuser 8, a piston cone part 9, a piston cylindrical part 10, and holes 1 1 on detachable parts of the housing, the upper cover 12 injection mold, the lower cover 13 injection molds, holes 14 for supplying molten polymer, holes 15 for exiting excess polymer, annular grooves 16, crimp clamp 17, conical surfaces 18 of the caps facing the inner cavity of the mold, pipe 19 with a bayonet groove, gaskets 20 made of graphite-containing or glass-containing insulating material.
  • a volumetric full-scale model of the finished product is made of fusible material.
  • One of the detachable parts of the body of the injection mold 4 is placed on the table with the open part upwards and the upper 12 and lower 13 of the injection mold cover are inserted into the annular grooves 16 with the conical surfaces 18 inward.
  • a mold-forming self-hardening material is placed in the liquid phase in the thus obtained open container, and a model of the finished product is immersed in it approximately half the volume. Excess mold material is removed to the plane of the connector. In the openings of the covers 14 and 15 are placed the elements of the gate system made of fusible material. The forming material is self-curing.
  • the connector plane of the forming material and the protruding surface of the model are coated with a composition that protects from adhesion.
  • the resulting prefabricated element is covered with the second part of the mold body 4 and the mold body is fastened with crimp clamps 17.
  • the mold body is fastened with crimp clamps 17.
  • the open hole 1 1 of the second part of the mold body 4 molding material is fed into the mold until the mold body is completely filled 4.
  • the model is melted by increasing the temperature of the mold to a value exceeding the melting temperature of the fusible material of the model and the gating system, for example, by immersion injection molding rmy in hot water for several minutes.
  • the injection mold is disassembled, the mold is cleaned of residues of the model material and collected again.
  • the gaskets 20 prevent the penetration of liquid polymer beyond the lower boundary of the cylindrical part of the piston 10, and the molten polymer or resin enters the internal cavity of the injection mold, without encountering obstacles, fill all the mold cavity through the hole 14, and the excess polymer or resin leaves through the hole 15.
  • turn off the heater 1 wait for the product to cure and turn off the foreline pump 7.
  • dismantle the housing 4 and the finished product is recovered which is purified by fin and transmitting the final processing.
  • the proposed invention can be used in medicine, food, chemical and other industries, where the processing of plastics or resins is carried out by molding.

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un dispositif de formation thermique d'un polymère fondu ou de résine au moyen de moulage par injection, qui comprend une unité de chauffage de chambre de fusion cylindrique dans laquelle est disposé un piston capable de se déplacer le long de l'axe de la chambre. La chambre de fusion et le moule d'injection sont disposés dans un corps hermétique amovible dont la cavité interne est connectée à une pompe de pré-vide. La cavité interne du moule d'injection communique avec la cavité interne du corps hermétique, et la chambre de fusion, le piston et le moule d'injection sont faits d'un alliage contenant de l'aluminium. Le moule d'injection comprend un corps avec un plan vertical de séparation, un couvercle inférieur comportant une ouverture pour l'alimentation en polymère fondu et un moyen de fixation à libération rapide à la chambre de fusion, et un couvercle supérieur comportant une ouverture pour l'évacuation d'excédent de polymère. Les deux couvercles sont coniques à l'intérieur de la cavité du moule et, sur le périmètre, sont formés des écoulements réalisés dans le corps, tandis que les parties amovibles du corps sont reliées par au moins une bride de serrage ajustable disposée sur la surface supérieure du corps.
PCT/RU2018/000355 2017-06-02 2018-05-31 Dispositif de formation thermique d'un polymère fondu ou d'une résine au moyen de moulage par injection [au moyen de moulage par injection wipopearl *par coulage sous pression] et moule d'injection [moule d'injection wipopearl *moule de coulée] pour ledit dispositif Ceased WO2018222089A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2017119376A RU2643562C1 (ru) 2017-06-02 2017-06-02 Устройство для термического формования расплавленного полимера или смолы литьем под давлением и литьевая форма для указанного устройства
RU2017119376 2017-06-02

Publications (1)

Publication Number Publication Date
WO2018222089A1 true WO2018222089A1 (fr) 2018-12-06

Family

ID=61173646

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2018/000355 Ceased WO2018222089A1 (fr) 2017-06-02 2018-05-31 Dispositif de formation thermique d'un polymère fondu ou d'une résine au moyen de moulage par injection [au moyen de moulage par injection wipopearl *par coulage sous pression] et moule d'injection [moule d'injection wipopearl *moule de coulée] pour ledit dispositif

Country Status (2)

Country Link
RU (1) RU2643562C1 (fr)
WO (1) WO2018222089A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115179498A (zh) * 2022-06-20 2022-10-14 李继荣 一种环保节能的塑料件注塑模具

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998014314A1 (fr) * 1996-09-30 1998-04-09 Hpm Stadco, Inc. Systeme de traitement de polymeres aux micro-ondes
US20070194474A1 (en) * 2006-02-23 2007-08-23 Nagy Peter S Injection molding press
RU133772U1 (ru) * 2012-10-22 2013-10-27 Александр Андреевич Максимов Устройство для термического формования полимера и/или смолы литьем под давлением
US20140335218A1 (en) * 2011-11-21 2014-11-13 Lg Electronics Inc. Mold for molding decorative outer panel of refrigerator and manufacturing method thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1260242A2 (ru) * 1985-05-15 1986-09-30 Ярославский политехнический институт Устройство дл изготовлени покрышек пневматических шин

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998014314A1 (fr) * 1996-09-30 1998-04-09 Hpm Stadco, Inc. Systeme de traitement de polymeres aux micro-ondes
US20070194474A1 (en) * 2006-02-23 2007-08-23 Nagy Peter S Injection molding press
US20140335218A1 (en) * 2011-11-21 2014-11-13 Lg Electronics Inc. Mold for molding decorative outer panel of refrigerator and manufacturing method thereof
RU133772U1 (ru) * 2012-10-22 2013-10-27 Александр Андреевич Максимов Устройство для термического формования полимера и/или смолы литьем под давлением

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115179498A (zh) * 2022-06-20 2022-10-14 李继荣 一种环保节能的塑料件注塑模具
CN115179498B (zh) * 2022-06-20 2023-09-29 佛山市顺德区天玛仕电子有限公司 一种环保节能的塑料件注塑模具

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