WO2004022306A1 - 複合射出成形方法並びに金型 - Google Patents
複合射出成形方法並びに金型 Download PDFInfo
- Publication number
- WO2004022306A1 WO2004022306A1 PCT/JP2003/011216 JP0311216W WO2004022306A1 WO 2004022306 A1 WO2004022306 A1 WO 2004022306A1 JP 0311216 W JP0311216 W JP 0311216W WO 2004022306 A1 WO2004022306 A1 WO 2004022306A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin
- molded product
- composite injection
- compression
- injection molding
- 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
-
- 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
- B29C45/1657—Making multilayered or multicoloured articles using means for adhering or bonding the layers or parts to each other
Definitions
- the present invention relates to a method and a mold for molding a composite injection molding by injecting a secondary resin molded product onto a primary resin molded product, and more particularly, to a method for molding a primary resin molded product and a secondary resin molded product.
- the present invention relates to a composite injection molding method and a metal mold, which selectively perform local compression on a portion where the adhesion is poor.
- the primary resin molding is made by injection molding, and the secondary resin is injected onto the primary resin molding to form a composite injection molded product.
- a composite injection molding method such as a two-color molding method such as a core back method and a slide method is known.
- An object of the present invention is to provide a composite injection-molded article having improved adhesion and airtightness between a primary-side resin molded article and a secondary-side resin molded article.
- the present inventor has conducted intensive studies with the aim of obtaining a composite injection molded article with improved adhesion and airtightness.As a result, during composite injection molding, a part where the flow distance from the gate position of the secondary resin is long, In the vicinity of places where adhesion is reduced, such as protrusions such as bosses and ribs on the surface of the secondary molded product, fluid pressure and electricity provided on the protrusion mechanism and the mold originally provided in the injection molding machine It has been found that the adhesion and airtightness of composite injection-molded products can be efficiently improved by local compression using a mechanism that moves a part of the mold using a mechanical drive or the repulsive force of an elastic body such as a panel. The present invention has been completed.
- the first aspect of the present invention is that when the secondary resin molded product (2) is injected onto the primary resin molded product (1) to form a composite injection molded product, the secondary resin molded product (2 ) Compression from the side to improve the adhesion and airtightness between the primary resin molded product (1) and the secondary resin molded product (2).
- the present invention provides a composite injection molding method characterized in that local compression is selectively performed in places where adhesion between a resin molded article and a secondary resin molded article (2) is inferior.
- a second aspect of the present invention is characterized in that the secondary-side resin molded product (2) has a projecting portion (4) projecting to the outside, and the projecting portion (4) is locally compressed.
- the present invention provides a composite injection molding method according to the above.
- a third aspect of the present invention provides the composite injection molding method according to the first aspect of the present invention, wherein the protruding portion (4) is a boss or a rib.
- a fourth aspect of the present invention provides the composite injection molding method according to the second aspect, wherein the protruding portion (4) is a boss or a rib.
- a fifth aspect of the present invention is that the secondary resin molded product (2) is connected to the secondary resin gate (7).
- the composite injection molding method according to the first aspect of the present invention wherein when a portion having a long distance is provided, a portion (8) having a long distance from the secondary resin gate (7) is locally compressed. I will provide a.
- a sixth aspect of the present invention is the composite injection molding according to any one of the first to fifth aspects of the present invention, wherein the compression start time is within 20 seconds from the surface solidification time after the gate sealing time of the secondary resin. Provide a method.
- a seventh aspect of the present invention is the use of the composite injection molding method according to any one of the first to fifth aspects of the present invention, wherein the primary resin molded article (1) and the secondary resin molded article (2) are adhered to each other.
- the present invention provides an injection molding die having local compression means (6) for selectively performing local compression in a part where resistance is poor.
- the eighth aspect of the present invention is used in the composite injection molding method according to the sixth aspect of the present invention, and is selected in a place where the adhesion between the primary resin molded article (1) and the secondary resin molded article (2) is poor.
- An injection molding die having local compression means (6) for locally performing local compression is provided.
- FIG. 4 is a plan view of the composite injection molded product according to Example 1 or 2, as viewed from the secondary resin molded product side. Fig. 4
- each secondary side resin The point of interest in the present invention is that each secondary side resin The point is that compression can be performed sufficiently by performing local compression depending on the solidification state, and the fact that the molten resin has been locally compressed to ribs or bosses where hardening of the molten resin is more difficult to achieve more effective compression .
- FIG. 2 shows a composite obtained by injection-filling the secondary resin 12 from the secondary resin gate 7 onto the primary resin molded product 1 to form the secondary resin molded product 2.
- FIG. 2 is a plan view of the injection molded product 10 viewed from the secondary resin molded product 2 side.
- the portion 8 where the flow distance of the secondary resin from the gate 7 is long is the compression point 3
- 5 is a rib for measuring the adhesion strength.
- Fig. 4 shows a composite injection molded product when the flow distance of the secondary resin from the gate position is long
- Fig. 5 shows a case where a protruding part such as a boss or rib is formed on the surface of the composite injection molded product.
- Good adhesion 21 1 is black
- poor 22 2 is observed from white (indicated by w) to red (indicated by r). The longer the flow distance, the lower the adhesion, and even the protruding parts Turned out to be inferior.
- the portion 8 where the flow distance of the secondary resin from the gate position is long is locally compressed.
- the number of compression points 3 at which the local compression is applied to the portion 8 is one or more, and may be divided into a plurality of points.
- the position where the flow distance from the secondary resin gate is long is limited as long as the ratio (LZ d) of the length from the secondary resin gate to the molded product thickness d (LZ d) is 20 or more and short shots do not occur. There is no. If it is smaller than 20, the compression effect will not be remarkably exhibited.
- One or more compression points may be used.
- the area of the compression section is not limited, but due to the restriction of the drive mechanism, if it is too large, the compression force is reduced and the effect is hardly produced.
- the compression pressure is preferably equal to or higher than the holding pressure applied to the resin.
- the compression volume is preferably close to the contraction volume of the secondary resin.
- the compression start time is within 20 seconds after the time when the gate solidifies after injection of the secondary resin (this is usually almost the same as the surface solidification time of the resin filled in the mold). It is preferred to start at If compression is started earlier than this, the compression force will escape from the unsolidified gate and the pressure will not be applied sufficiently to the resin. If compression is started later, the resin surface will be too hard and the compression effect will be sufficient. Cannot be demonstrated.
- FIG. 3 shows the composite injection molding obtained by injecting and filling the secondary resin 1 2 from the secondary resin gate 7 onto the primary resin molded product 1 to form the secondary resin molded product 2.
- FIG. 2 is a plan view of a product 10 as viewed from a secondary resin molded product 2 side.
- the part A or the part (:, rib B provided in the part 8 where the flow distance of the secondary resin from the gate 7 is long is Location 3 is also a rib for measuring adhesion strength.
- the re-melting of the primary resin and the welding destruction and peeling after the welding of the primary resin and the secondary resin in the above description may occur. This tends to cause the adhesive to deteriorate.
- the secondary molded product surface has a tripped shape, so the interface between the primary resin and the secondary resin, which is the back of the boss or rib, A phenomenon called sink marks occurs, and the primary resin and the secondary resin melt rupture or peel off, and the resin orientation is reduced by the flow of the molten resin when flowing into the boss / rib. Because it is different from the location where the resin flows in the plane, the linear expansion partially changes, and in addition, the primary resin and the secondary resin are liable to melt rupture or peel off.
- the portion to be compressed is a portion where the height of the molded product is high, such as a rib or a boss, that is, a protruding portion 4 is effective. This is because the internal solidification time of the molten resin is delayed due to the effect of increasing the thickness of the molded product by maintaining the height of the molded product, so that control under a wider range of compression conditions is possible, and an effective compression action can be expected.
- the compression location 3 is one or more locations, and may be added in multiple locations.
- the height of the protruding portion 4 is 0.5 mm or more.
- the composite injection resin molding die according to the present invention comprises: a primary resin molded product 1; a secondary resin molded product 2 is injected onto the primary resin molded product 1 to form a composite injection molded product; and the primary resin molded products 1 and 2 It is a mold that can selectively perform local compression from the secondary resin molded product 2 side where the adhesion of the secondary resin molded product 2 is poor.
- the means for performing local compression 6 may be an ejector mechanism of an injection molding machine, for example, a means using an ejector pin, or a means for compressing with a movable core using a hydraulic, pneumatic or spring in a mold.
- the resin that can be used in the present invention is a thermoplastic resin.
- the thermoplastic resin may be any type of resin such as a crystalline resin, an amorphous resin, a biodegradable resin, a non-biodegradable resin, a synthetic resin, a resin made in nature, a general-purpose resin, an engineering resin, and a polymer alloy.
- Thermoplastic resins include polyethylene (PE), polypropylene (PP), polystyrene (PS), AS resin, ABS resin, polyvinyl chloride (PVC), polyacrylonitrile (PAN), (meth) acrylic resin, and cellulose resin. , Polyurethane, and elastomers.
- Engineering resins include various types of aliphatic polyamides or aromatic polyamides (PA) such as nylon 6, 6, 6, 12, and 12; polyethylene terephthalate (PET); and polybutylene terephthalate (PBT).
- Aromatic polyester resin such as polyacrylonitrile (PC), polyacetal, polyphenylene ether (PPO), polyphenylene sulfide (PPS), liquid crystalline polymer such as liquid crystalline polyester and liquid crystalline polyamide, fluorine resin And the like.
- biodegradable resins such as aliphatic dicarboxylic acids, aliphatic diols, aliphatic hydroxy carboxylic acids or aliphatic polyesters derived from cyclic compounds thereof, and aliphatic polyesters whose molecular weights have been increased by diisocyanate or the like And so on.
- the primary resin and the secondary resin may be the same or different. If the processing temperature of the secondary resin is higher than the solidification temperature of the primary resin, the adhesion will be higher.
- the primary resin and the secondary resin may be added with various inorganic or organic fillers such as fibrous, plate-like, spherical, amorphous, and various stabilizers / modifiers.
- the composite injection resin molded product according to the present invention is used for exterior parts such as a housing, electrical parts such as a switch connector, mechanical parts such as levers, gears and cams, and hollow parts.
- JURANEX 330 RA (a low-melting type glass fiber-containing PBT resin with a melting point of about 205) manufactured by Wintech Polymer Co., Ltd. for the primary resin and JURANEX 330 for the secondary resin (A normal type of glass fiber-filled PBT resin having a melting point of about 222 ° C., manufactured by Wintech Polymer Co., Ltd.) was used.
- the primary-side resin molded product as shown in Fig. 1 is molded, and the cooled and solidified primary-side resin molded product is placed in the mold cavity. ° C, under the conditions of injection speed 1 O mm / s, the pin gate diameter 1. 5 mm, was filled in a mold of 8 0 D C, to obtain a composite injection molded article as shown in FIG.
- the dimensions of the primary resin molded product are 130 mm in length ⁇ 40 mm in width ⁇ 3 mm in thickness in the product part, and the dimensions of the secondary resin molded product are in the product part 10 O mmX 3 0] 11111 And the contact area between the primary resin molded product and the secondary resin molded product is 100 mm ⁇ 30 mm.
- Reference numeral 9 denotes a primary resin gate
- reference numeral 17 denotes a through hole for a secondary resin gate.
- 7 is a secondary resin gate.
- Two ribs were provided on the primary resin molded product and two ribs were provided on the secondary resin molded product.
- the positions where the ribs of the secondary-side resin molded product are provided are positions where the distance from the secondary-side resin gate 7 to the ribs is 10 mm and 70 mm from the gate 7 side.
- the position where the rib of the primary resin molded product is provided is on the symmetrical side of the position where the rib of the secondary resin molded product is provided.
- Example 1 local compression was performed using an ejector mechanism of an injection molding machine.
- the local compression position is position A where the flow distance from the secondary resin gate is long, as shown in FIG.
- the diameter of the compression point is 1 O mm
- the compression force is 3.00 O kg
- the compression distance changes with the time elapsed after injection. At 0 seconds after injection, no compression was performed because the resin was not completely filled in the cavity.
- Example 2 local compression was performed using an ejector mechanism of an injection molding machine. As shown in Fig. 3, the local compression position is only the position B at the rib on the side opposite the gate to the resin gate on the secondary side in the secondary-side molded product. Re.
- the shape of the compression point is 15 mm X 1.5 mm (rectangular), the compression force is 3,000 kg, and the compression distance is 0.5 mm.
- Comparative Example 1 the entire contact surface was compressed. In full-scale compression, the entire mold is compressed in the closing direction, the compression force is 100 t, and the maximum compression distance is 0.1 mm.
- the compression start timing was indicated by the set number of seconds for starting the ejector pin advance after injection.
- the ribs of the primary resin molded product and the secondary resin molded product were pulled, and the adhesion strength (maximum load) at the non-gate side rib was measured.
- Table 1 shows the results of the relationship between the compression start time, compression distance, and adhesion strength.
- Stopl indicates the surface solidification time when the part A is compressed
- EJ Stop2 indicates the surface solidification time when the rib B is compressed.
- Table 2 shows the measurement results of the relationship between the compression strength at the compression points A and C and the adhesion strength.
- the method of locally compressing according to the present invention in particular, starting compression by compressing bosses, ribs, etc.
- the timing can be delayed, and effective adhesion strength can be obtained.
- the method is more effective because the surface solidification proceeds at a specific temperature depending on the solidification point of each resin.
- the compression effect can be effectively and effectively performed by selectively performing local compression in a portion where the adhesion between the primary resin molded product and the secondary resin molded product is poor.
- the adhesiveness can be improved by effectively compressing the resin at a location where the adhesiveness is desired, regardless of the surface solidification distribution of the molten resin at the time of filling the resin into the mold.
- the composite injection molded article which improved the adhesion and airtightness of the primary side resin molded article and the secondary side resin molded article is obtained.
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- 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)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03794190A EP1541317A4 (en) | 2002-09-03 | 2003-09-02 | INJECTION COMPOSITE MOLDING PROCESS AND MOLD COMPRISING THE SAME |
US10/523,524 US20060049544A1 (en) | 2002-09-03 | 2003-09-02 | Method of composite injection molding and mold |
AU2003264369A AU2003264369A1 (en) | 2002-09-03 | 2003-09-02 | Method of composite injection molding and mold |
JP2004534140A JP4368799B2 (ja) | 2002-09-03 | 2003-09-02 | 複合射出成形方法並びに金型 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-258062 | 2002-09-03 | ||
JP2002258062 | 2002-09-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004022306A1 true WO2004022306A1 (ja) | 2004-03-18 |
Family
ID=31973012
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/011216 WO2004022306A1 (ja) | 2002-09-03 | 2003-09-02 | 複合射出成形方法並びに金型 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060049544A1 (ja) |
EP (1) | EP1541317A4 (ja) |
JP (1) | JP4368799B2 (ja) |
AU (1) | AU2003264369A1 (ja) |
WO (1) | WO2004022306A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006110994A (ja) * | 2004-10-11 | 2006-04-27 | Incos Spa | 射出圧縮によってオーバーモールドされた部品を備えたプラスチック材料製のプレートを製造するための方法 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7796368B2 (en) | 2003-11-27 | 2010-09-14 | Daihen Corporation | High-frequency power supply system |
US9549855B2 (en) | 2013-02-15 | 2017-01-24 | 3M Innovative Properties Company | Earplug with tip cavity and methods of manufacturing the same |
CN110618315B (zh) * | 2019-09-10 | 2021-10-29 | 国营洛阳丹城无线电厂 | 50kHz调制4GHz1.5W高频源输入阻抗的方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS529540A (en) * | 1975-07-14 | 1977-01-25 | Asics Corp | Method of manufacturing shoes with emergence type mold shoe sole |
JPS61150110U (ja) * | 1985-03-11 | 1986-09-17 | ||
JPH05200801A (ja) * | 1991-11-22 | 1993-08-10 | Honda Motor Co Ltd | 射出成形方法 |
JPH11170305A (ja) * | 1997-12-16 | 1999-06-29 | Canon Inc | 成形金型および成形方法ならびに成形品 |
JP2001047463A (ja) * | 1999-08-05 | 2001-02-20 | Toyota Autom Loom Works Ltd | 樹脂パネルの製造方法及び樹脂パネル |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55140539A (en) * | 1979-04-23 | 1980-11-04 | Toppan Printing Co Ltd | Multilayer injection forming |
JP2654623B2 (ja) * | 1988-12-27 | 1997-09-17 | 住友化学工業株式会社 | 表皮材を貼着した合成樹脂成形体の製造方法及びこの方法で使用する装置 |
CA2065465A1 (en) * | 1991-04-08 | 1992-10-09 | Hiromasa Nakatsuka | Process for producing multilayer molded article |
JP2726961B2 (ja) * | 1992-01-28 | 1998-03-11 | 住友化学工業株式会社 | 多層成形品およびその成形方法 |
JPH07290500A (ja) * | 1994-04-28 | 1995-11-07 | Toyoda Gosei Co Ltd | 樹脂製品の製造方法 |
US5846470A (en) * | 1994-06-08 | 1998-12-08 | Sumitomo Bakelite Company Limited | Process for production of phenolic resin pulley |
JP3561010B2 (ja) * | 1994-10-24 | 2004-09-02 | 浜口樹脂工業株式会社 | 二材成形方法及び金型装置 |
JPH11277576A (ja) * | 1998-03-31 | 1999-10-12 | Nippon Plast Co Ltd | 発泡樹脂成形品の成形方法及び成形用金型装置 |
-
2003
- 2003-09-02 JP JP2004534140A patent/JP4368799B2/ja not_active Expired - Fee Related
- 2003-09-02 WO PCT/JP2003/011216 patent/WO2004022306A1/ja not_active Application Discontinuation
- 2003-09-02 US US10/523,524 patent/US20060049544A1/en not_active Abandoned
- 2003-09-02 EP EP03794190A patent/EP1541317A4/en not_active Withdrawn
- 2003-09-02 AU AU2003264369A patent/AU2003264369A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS529540A (en) * | 1975-07-14 | 1977-01-25 | Asics Corp | Method of manufacturing shoes with emergence type mold shoe sole |
JPS61150110U (ja) * | 1985-03-11 | 1986-09-17 | ||
JPH05200801A (ja) * | 1991-11-22 | 1993-08-10 | Honda Motor Co Ltd | 射出成形方法 |
JPH11170305A (ja) * | 1997-12-16 | 1999-06-29 | Canon Inc | 成形金型および成形方法ならびに成形品 |
JP2001047463A (ja) * | 1999-08-05 | 2001-02-20 | Toyota Autom Loom Works Ltd | 樹脂パネルの製造方法及び樹脂パネル |
Non-Patent Citations (1)
Title |
---|
See also references of EP1541317A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006110994A (ja) * | 2004-10-11 | 2006-04-27 | Incos Spa | 射出圧縮によってオーバーモールドされた部品を備えたプラスチック材料製のプレートを製造するための方法 |
JP4524227B2 (ja) * | 2004-10-11 | 2010-08-11 | イングラス ソシエタ ア レスポンサビリタ リミタータ | 射出圧縮によってオーバーモールドされた部品を備えたプラスチック材料製のプレートを製造するための方法 |
Also Published As
Publication number | Publication date |
---|---|
US20060049544A1 (en) | 2006-03-09 |
AU2003264369A1 (en) | 2004-03-29 |
JP4368799B2 (ja) | 2009-11-18 |
EP1541317A1 (en) | 2005-06-15 |
EP1541317A4 (en) | 2007-02-28 |
JPWO2004022306A1 (ja) | 2005-12-22 |
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