WO1997016295A1 - Procede de fabrication d'un article moule en resine synthetique de type sandwich - Google Patents
Procede de fabrication d'un article moule en resine synthetique de type sandwich Download PDFInfo
- Publication number
- WO1997016295A1 WO1997016295A1 PCT/JP1996/003225 JP9603225W WO9716295A1 WO 1997016295 A1 WO1997016295 A1 WO 1997016295A1 JP 9603225 W JP9603225 W JP 9603225W WO 9716295 A1 WO9716295 A1 WO 9716295A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- outer layer
- core
- molding material
- injection speed
- injection
- Prior art date
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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
-
- 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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3044—Bumpers
Definitions
- the present invention relates to a method for producing a sandwich-like synthetic resin molded article, and more particularly, to producing a sandwich-like synthetic resin molded article comprising a core and an outer layer covering the core.
- the maximum value of the injection speed V 2 of the molding material for the core in the second step is set lower than the maximum value of the injection speed V of the outer layer forming material in the first step.
- the present invention relates to the above-mentioned manufacturing method, wherein the molding material for the core can be reliably flowed into the front side in the flow direction of the molding material for the outer layer, thereby obtaining a synthetic resin molded body having a sandwich structure over the whole.
- the purpose is to provide.
- the injection phase of the injection speed v 2 is set higher than the injection speed in the first step of the co ⁇ forming material a second step with said outer layer forming material, the injected by an injection speed V 3 of the final injection speed following the outer layer forming material in the second step, prior to the double structure existing in the said gate
- a third step of molding the core and the outer layer by extruding the molding material for the outer layer and the core into the cavity and a method for producing a sandwich-like synthetic resin molded product using the third step.
- the second step when the set injection speed V 2 of the molding material for the core to be faster than the injection speed V ⁇ the outer layer forming material in the first step as the flow direction front portion of the outer employment molding material
- the front side in the flow direction of the molding material for the core can be present in the front side in the flow direction.
- the outer layer forming material in the third step is to flow into the core forming material in
- the gate communication part of the synthetic resin molded body can be molded only with the outer layer molding material.
- the injection speed V 2 is increased, so that the cycle time for manufacturing the molded body is reduced, and the mass productivity of the molded body is reduced. Can be improved.
- FIG. 1 is a perspective view of the pump
- FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1
- FIG. 3 is a vertical cross-sectional view of the injection molding apparatus
- FIG. 4 is a first process drawing
- FIG. 7 is a graph showing the relationship between the injection time and the injection speed in the first embodiment
- FIG. 8 is a graph showing the relationship between the injection time and the injection speed in the second embodiment
- FIG. FIG. 10 is a graph showing the relationship between the injection time and the injection speed in the third embodiment
- FIG. 10 is a graph showing the relationship between the injection time and the injection speed in the comparative example.
- a synthetic resin pump 3 as a sandwich-like synthetic resin molded body is attached to a front portion of a vehicle body 2 of an automobile 1.
- the bumper 3 includes a core 4 and an outer layer 5 covering the core 4 as shown in FIG.
- the molding material of the core 4 is molded using polypropylene (PP) modified with ethylene propylene rubber (EPR) and obtained by crushing a recovered bumper having a thermosetting synthetic resin coating film on the surface.
- the molding material of the outer layer 5 is mainly composed of polypropylene modified with ethylene propylene rubber.
- an injection molding apparatus 6 used to manufacture the pump 3 includes a first injection unit 8 having a screw 7 for injecting the molding material for the outer layer, and a screw 9 for injecting the molding material for the core.
- a second injection unit 10 having a nozzle, a nozzle 11 connecting the two injection units 8, 10; a hot runner block 12 connected to the nozzle 11; And a split mold 13.
- the mold 13 includes a fixed mold 13 i on the side of the hot runner block 12 and a plurality of movable molds 13 2 that can move forward and backward with respect to the fixed mold 13.
- the supply path 14 of the nozzle 11 communicates with the plurality of gates 16 of the mold 13 via the hot runner 15, and each gate 16 communicates with the cavity 17 for bumper molding.
- H ⁇ indicates a cartridge heater.
- a hollow outer dollar 18 and a solid inner dollar 19 are arranged concentrically.
- the valve portion 20 on the distal end side faces the supply path 14, and the biston 21 on the proximal end side is slidably fitted in the cylinder 22.
- the piston 21 and the cylinder 22 constitute a supply path opening / closing operation mechanism 23.
- valve portion 24 on the distal end faces the valve hole 25 formed in the valve portion 20 of the outer dollar 18, and the piston 26 on the proximal end is on the outer side.
- the needle 18 is slidably fitted to a cylinder portion 27 formed on the proximal end side.
- the piston 26 and the cylinder part 27 constitute a valve hole opening / closing operation mechanism 28.
- the outer needle 18 has a tapered outer peripheral surface connected to the valve portion 20, and an outer passageway 29 is formed between the tapered outer peripheral surface and the nozzle 11 inner peripheral surface.
- One end of the outer passage 29 communicates with the supply passage 14, and the other end communicates with the first discharge unit 8 via the through hole 30 of the nozzle 11.
- the outer dollar 18 has a straight outer peripheral surface at the base end side, and the through hole 30 can be closed by the outer peripheral surface.
- the inner needle 19 has a tapered outer peripheral surface connected to the valve portion 24, and an inner passage 31 is formed between the tapered outer peripheral surface and the inner peripheral surface of the outer needle 18.
- One end of the inner passage 31 is communicated with the valve hole 25, and the other end is communicated with the second injection unit 10 via the outer needle 18 and the through holes 32, 33 of the nozzle 11 respectively.
- the ⁇ -side dollar 19 has a straight outer peripheral surface on the base end side, and the through hole 32 can be closed by the outer peripheral surface.
- the composition of the recovered bamba was as follows.
- the collected bamba is put into a grinder to grind, and then the pulverized material is put into a granulator to perform melting and kneading, and the molten and kneaded material is passed through an 80 to 100 mesh filter to remove coarse particles. After removal, the melt-kneaded material was formed into a linear material through a thin tube having an inner diameter of about 1 m, and the linear material was cut into a length of 1 to several m to obtain a pellet-shaped molding material for a core. .
- the molding material for the outer layer is charged into the first injection unit 8 and kept in a molten state at 210 ° C., and the molding material for the core is charged into the second injection unit 10. And maintained in a molten state at 200 ° C.
- Each pre-heating temperature of the fixed mold 1 3 E and the movable mold 1 3 2 is 4 0 ° C, 5.
- the molding of the pump 3 can be performed continuously.
- Table 1 in the preparation of example (1) shows the injection speed and the first to third injection time of the outer layer forming material 1 and the core forming material Micromax 2 related process.
- FIG. 7 is a graph showing the relationship between the injection time and the injection speed based on Table 1.
- the molding material for the outer layer was controlled in one step.
- the second step setting the injection speed V 2 of the core forming material M 2 as described above to be faster than the injection speed of the outer layer forming material in the first step, the outer layer as shown in FIG. 5 when the flow direction front side of the use molding material IV ⁇ reaches the vicinity end of Kiyabiti 1 7, there can be a flow direction front side of Koa forming material M 2 in the flow direction front side within.
- the injection speed Vc of the outer layer forming material, following injection speed V] in the first step Vg so set slower than the injection speed in manufacturing of this Example (1), the core forming material M 2 also the velocity V 2 out morphism without so fast, both materials I ⁇ , can be increased injection speed difference M 2.
- the example (1) of the pump 3 having the sandwich structure over the whole was obtained.
- the fill rate of the prepared from the recovered Pampa co ⁇ forming material M 2 is high, is effective in reducing and resource saving production costs of Bamba 3.
- Example Pampa 3 (2) shows the first to third step outer layer forming materials for M, and the injection time and the injection rate of the core forming material M 2.
- FIG. 8 is a graph showing the relationship between the injection time and the injection speed based on Table 2.
- the injection speed is two steps for the outer layer molding material in the first step, one step for the core molding material M2 in the second step, three steps for the outer layer molding material, and three steps for the outer layer molding material in the third step.
- the molding material I ⁇ was controlled in one step.
- the example (2) of Bamba obtained under the relationship of the injection speed V 3 ⁇ V X ⁇ V 2 has good quality similarly to the example (1).
- the injection speed V a (V,) of the first step is set faster than in the case of the example (1), and the start timing of the second step is the same as in the example (1). earlier is than, and so is set faster than the even example injection speed V 2 (1), the cycle time for Pampa production is more in the case of example (2) example (1) It is shorter than the case.
- Table 3 is a manufacturing example of the Banbury 3 (3) shows the injection speed and the first to third step outer layer forming material IV ⁇ and injection time of the core forming material M 2 relating. [Table 3]
- FIG. 9 is a graph showing the relationship between the injection time and the injection speed based on Table 3.
- the injection speed is one step for the outer layer molding material I ⁇ in the first step, one step for the core molding material M2 in the second step, three steps for the outer layer molding material, and three steps in the third step.
- the molding material for the outer layer was controlled in one step.
- the example (3) of Bamba obtained under the relationship of the injection speed V 3 ⁇ V 3 ⁇ V 2 also had good quality similarly to the example (1).
- the injection speed V in the first step is made lower than the injection speed Va in the first step of example (2), and the injection speed V is maintained at the beginning of the second step. As a result, the cycle time is shortened.
- Table 4 in the production of Banbury according to the comparative example, shows a first, outer layer forming material for the second step and the injection speed and the injection time of the core forming material M 2.
- FIG. 10 is a graph in which the relationship between the injection time and the injection speed is roughened based on Table 4.
- the injection speed is one step for molding material for the outer layer I ⁇ in the first step, the core forming material M 2 in three stages in the second step, also respectively controlled in two stages for the outer layer forming material M 2 Was.
- the injection speed V b of the core forming material M 2 in the second step due to the lower than the injection speed V a of the outer layer forming material in the first step from the injection inception, comparison for Bamba by example, the molding material IV ⁇ flow direction front the forming core material M 2 is not flowed for the outer layer, in front of the front portion thereof, the molding material M 2 is a molding material for the outer layer core Breaking through and eating out of the surface occurred.
- the comparative example does not include the third step, it is impossible to perform continuous molding.
- Examples of the molding material for the outer layer used in the production of Bamba 3 include the following in addition to the above.
- the core forming material M 2 used in the manufacture of Pampa 3, can include the following outside of the foregoing.
- the present invention is also applicable to the manufacture of sandwich-like synthetic resin molded articles other than pampers, for example, vehicle parts such as instrument panels and console boxes, and boxes for household electric appliances.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/000,044 US6030567A (en) | 1995-11-02 | 1996-11-05 | Process for producing sandwich-shaped synthetic resin-molded article |
EP96935537A EP0865894B1 (en) | 1995-11-02 | 1996-11-05 | Process for producing sandwich-like synthetic resin molded article |
DE69627371T DE69627371T2 (de) | 1995-11-02 | 1996-11-05 | Verfahren zum herstellen von in sandwich-form hergestellten kunststoffharz-gegenständen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7/286204 | 1995-11-02 | ||
JP28620495A JP3261289B2 (ja) | 1995-11-02 | 1995-11-02 | サンドイッチ状合成樹脂成形体の製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997016295A1 true WO1997016295A1 (fr) | 1997-05-09 |
Family
ID=17701320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1996/003225 WO1997016295A1 (fr) | 1995-11-02 | 1996-11-05 | Procede de fabrication d'un article moule en resine synthetique de type sandwich |
Country Status (5)
Country | Link |
---|---|
US (1) | US6030567A (ja) |
EP (1) | EP0865894B1 (ja) |
JP (1) | JP3261289B2 (ja) |
DE (1) | DE69627371T2 (ja) |
WO (1) | WO1997016295A1 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6305563B1 (en) | 1999-01-12 | 2001-10-23 | Aptargroup, Inc, | One-piece dispensing structure and method and apparatus for making same |
US6789301B1 (en) | 2001-03-21 | 2004-09-14 | Honda Motor Co., Ltd. | System and method for spotting movable mold cores |
US6696003B2 (en) * | 2001-05-29 | 2004-02-24 | Habasit Ag | Methods for manufacturing a module for a modular conveyor belt having a sandwich layer construction |
GB2385552A (en) * | 2002-02-26 | 2003-08-27 | Ind Lombarda Materiale Electtr | Casing structure for electrical material and production method thereof |
US6756004B2 (en) * | 2002-04-24 | 2004-06-29 | Lear Corporation | Method for manufacturing cockpit-type instrument panels |
DE102006004476A1 (de) * | 2006-01-30 | 2007-08-02 | Hamberger Industriewerke Gmbh | Verfahren zur Herstellung eines Formteils und ein nach diesem Verfahren hergestelltes Formteil |
ATE501901T1 (de) * | 2008-04-30 | 2011-04-15 | Peguform Gmbh | Innenverkleidung mit integrierter airbagabdeckung |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51109952A (en) * | 1975-03-25 | 1976-09-29 | Toshiba Machine Co Ltd | Goseijushiseihinno shashutsuseikeihoho oyobi sonosochi |
JPS608023A (ja) * | 1983-06-28 | 1985-01-16 | Meiki Co Ltd | サンドイツチ用射出成形機 |
JPH05131495A (ja) * | 1991-09-11 | 1993-05-28 | Showa Denko Kk | サンドイツチ射出成形法 |
JPH05169492A (ja) * | 1991-12-19 | 1993-07-09 | Toyo Mach & Metal Co Ltd | 複合射出成形方法 |
JPH06328509A (ja) * | 1993-05-21 | 1994-11-29 | Toyota Motor Corp | サンドイッチ状成形品の製造方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4120922B1 (en) * | 1958-05-09 | 1996-07-16 | Jerome H Lemelson | Method for molding |
US4174413A (en) * | 1976-07-27 | 1979-11-13 | Asahi-Dow Limited | Multi-layered molded articles |
JPS55142632A (en) * | 1979-03-31 | 1980-11-07 | Toyota Motor Corp | Low-pressure injecting method using screw inlying injection molding machine |
IT8053671V0 (it) * | 1980-11-14 | 1980-11-14 | Cigala & Bertinetti Ind | Elemento stampato in materiale plastico a due componenti particolarmente paraurti per autoveicoli |
US4550043A (en) * | 1984-02-17 | 1985-10-29 | Continental Plastic Containers, Inc. | Preform with internal barrier and internal layer of high thermal stability and products made from the same |
IT1211375B (it) * | 1987-09-30 | 1989-10-18 | Fiat Auto Spa | Carrozzeria dell autoveicolo procedimento per la produzione mediante stampaggio ad iniezione di elementi strutturali di materiale plastico termoindurente particolarmente di parti componenti della |
JPH03264327A (ja) * | 1990-03-14 | 1991-11-25 | Komatsu Ltd | 射出成形機の射出速度制御方法 |
GB2271967B (en) * | 1992-11-02 | 1996-10-23 | Honda Motor Co Ltd | Automobile bumper and injection mold for forming such automobile bumper |
-
1995
- 1995-11-02 JP JP28620495A patent/JP3261289B2/ja not_active Expired - Fee Related
-
1996
- 1996-11-05 EP EP96935537A patent/EP0865894B1/en not_active Expired - Lifetime
- 1996-11-05 US US09/000,044 patent/US6030567A/en not_active Expired - Fee Related
- 1996-11-05 DE DE69627371T patent/DE69627371T2/de not_active Expired - Fee Related
- 1996-11-05 WO PCT/JP1996/003225 patent/WO1997016295A1/ja active IP Right Grant
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51109952A (en) * | 1975-03-25 | 1976-09-29 | Toshiba Machine Co Ltd | Goseijushiseihinno shashutsuseikeihoho oyobi sonosochi |
JPS608023A (ja) * | 1983-06-28 | 1985-01-16 | Meiki Co Ltd | サンドイツチ用射出成形機 |
JPH05131495A (ja) * | 1991-09-11 | 1993-05-28 | Showa Denko Kk | サンドイツチ射出成形法 |
JPH05169492A (ja) * | 1991-12-19 | 1993-07-09 | Toyo Mach & Metal Co Ltd | 複合射出成形方法 |
JPH06328509A (ja) * | 1993-05-21 | 1994-11-29 | Toyota Motor Corp | サンドイッチ状成形品の製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0865894A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP0865894B1 (en) | 2003-04-09 |
DE69627371D1 (de) | 2003-05-15 |
US6030567A (en) | 2000-02-29 |
DE69627371T2 (de) | 2003-10-16 |
EP0865894A4 (en) | 2000-12-20 |
JPH09123215A (ja) | 1997-05-13 |
JP3261289B2 (ja) | 2002-02-25 |
EP0865894A1 (en) | 1998-09-23 |
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