JPH01221216A - Resin injection molding device - Google Patents
Resin injection molding deviceInfo
- Publication number
- JPH01221216A JPH01221216A JP63049146A JP4914688A JPH01221216A JP H01221216 A JPH01221216 A JP H01221216A JP 63049146 A JP63049146 A JP 63049146A JP 4914688 A JP4914688 A JP 4914688A JP H01221216 A JPH01221216 A JP H01221216A
- Authority
- JP
- Japan
- Prior art keywords
- air
- liquid resin
- mixed liquid
- resin
- mold
- 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.)
- Pending
Links
- 239000011347 resin Substances 0.000 title claims abstract description 69
- 229920005989 resin Polymers 0.000 title claims abstract description 69
- 238000001746 injection moulding Methods 0.000 title claims description 21
- 239000007788 liquid Substances 0.000 claims abstract description 52
- 238000000465 moulding Methods 0.000 claims abstract description 19
- 238000007599 discharging Methods 0.000 claims abstract 2
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 239000011800 void material Substances 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 229920001187 thermosetting polymer Polymers 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract description 6
- 238000005266 casting Methods 0.000 abstract 5
- 238000000034 method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- WFUGQJXVXHBTEM-UHFFFAOYSA-N 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane Chemical compound CCC(C)(OO)OOC(C)(CC)OO WFUGQJXVXHBTEM-UHFFFAOYSA-N 0.000 description 2
- 229920006305 unsaturated polyester Polymers 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はｌＩｍ維強化プラスチックの成形装置の一つで
あるレジンインジェクション成形装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a resin injection molding device, which is one of the molding devices for lIm fiber-reinforced plastic.
レジンインジェクション成形装置は、不飽和ポリエステ
ルなどの熱硬化性樹脂を低粘度の液体状態でメチルエチ
ルケトンパーオキサイド等からなる硬化剤と連続的に定
量温合させた混合液状レジンをノズルから順次成形型の
空隙に射出して硬化させプラスチック成形品を成形する
装置である。Resin injection molding equipment uses a mixed liquid resin that is made by continuously heating a thermosetting resin such as unsaturated polyester in a low viscosity liquid state with a hardening agent such as methyl ethyl ketone peroxide, etc. through a nozzle into the cavity of the mold. This is a device that injects and hardens plastic to form plastic molded products.
レジンインジェクション成形装置において用いる成形型
は、目的とする成形品の形状を有する空隙を形成する密
閉型で、該空隙に上記混合液状レジンを導入するゲート
を有している。成形に際しては、混合液状レジンを射出
する前に空隙内にガラス＆ａ維等の補強剤を予めセット
しておき、ゲート部にノズルを装填して混合液状レジン
を注入するようになっている。The mold used in the resin injection molding apparatus is a closed mold that forms a void having the shape of the intended molded product, and has a gate for introducing the mixed liquid resin into the void. During molding, before injecting the mixed liquid resin, a reinforcing agent such as glass and a-fiber is set in advance in the gap, and a nozzle is loaded into the gate part to inject the mixed liquid resin.
第２図は従来のレジンインジェクション成形装置の成形
用型部分を示す図で、単純な形状をした箱状の製品を成
形するための成形用型部分を示す図である。図示するよ
うに、成形型は上型４と下型５とからなり、該上型４と
下型５とで成形品の形状を有する空隙６を形成している
。上型４の中央部底面にゲート１を設け、混合液状レジ
ンを注入することにより、製品最上部の見切り而２に設
けたピンチオフ機構３から空隙６内の空気が外部に排出
され、空気がレジン中に巻き込むことがないように工夫
されている。FIG. 2 is a diagram showing a molding part of a conventional resin injection molding apparatus, and is a diagram showing a molding part for molding a box-shaped product having a simple shape. As shown in the figure, the mold consists of an upper mold 4 and a lower mold 5, and the upper mold 4 and the lower mold 5 form a gap 6 having the shape of a molded product. By providing a gate 1 at the bottom of the center part of the upper mold 4 and injecting the mixed liquid resin, the air in the gap 6 is discharged to the outside from the pinch-off mechanism 3 provided at the parting point 2 at the top of the product, and the air is released into the resin. It is designed to prevent it from getting caught inside.
第３図も従来のレジンインジェクション成形装置の成形
用型部分を示す図で、第２図の成形用型に比較し、比較
的複雑な構造の一部にアンダーカットを有する製品を成
形するための成形用型部分を示す図である。なお、同図
（ａ）は正断面図、同図（ｂ）は同図（ａ）のＡ−Ａ線
上断面図である。図示するように、成形型は上型１７と
下型１８と中子型１９からなり、見切り面２０は成形用
型の構造及び抜型上から略中央に位置している。また、
空隙２１の最上面には空気抜孔１２が形成されている。Figure 3 also shows the mold part of a conventional resin injection molding device.Compared to the mold shown in Figure 2, it is designed for molding products with relatively complex structures and undercuts. It is a figure which shows the mold part for shaping|molding. In addition, FIG. 5(a) is a front sectional view, and FIG. 2(b) is a sectional view taken along the line A--A in FIG. 4(a). As shown in the figure, the mold consists of an upper mold 17, a lower mold 18, and a core mold 19, and the parting surface 20 is located approximately at the center from above the structure of the mold and the cutting mold. Also,
An air vent hole 12 is formed in the uppermost surface of the cavity 21 .
上型１７の中央部に設けたゲート１１から前記混合液状
レジンを注入し、空気抜孔１２から空隙２１内の空気を
外部に排出している。The mixed liquid resin is injected through a gate 11 provided at the center of the upper mold 17, and air in the gap 21 is discharged to the outside through an air vent hole 12.
上記成形用型を具備する従来のレジンインジェクション
成形装置において、第２図に示すように、単純な形状の
製品を成形する場合は、液状レジンの流動性を阻害しな
いから、成形品に気泡等の欠陥部が発生することなく、
レジンインジェクション成形の特徴を充分発揮できる。In the conventional resin injection molding equipment equipped with the above-mentioned mold, when molding a product with a simple shape, as shown in Fig. 2, air bubbles etc. in the molded product do not impede the fluidity of the liquid resin. No defects occur,
The characteristics of resin injection molding can be fully demonstrated.
しかしながら第３図に示すように、一部にアンダーカッ
トを有するような複雑な構造の製品の成形においては、
上部から液状レジンを注入するため、ゲート１１の近傍
及びフランジ１５．１６の近傍等に空気の巻き込みが発
生し、成形製品に気泡１３の欠陥部が発生するという問
題があった。また、空隙２１の最上面に設けられた空気
抜孔１２は液状レジンの射出速度に対して、径が大きい
ため、液状レジンの流動抵抗が小さく空隙２１が液状レ
ジンで満されるまえに空気抜孔１２から液状レジンが流
れ出てしまい空気抜孔１２から少し離れた部分に空気溜
り１４を形成してしまう。この空気溜り１４は液状レジ
ンを空隙２１内に充填した後、いくら液状レジンを注入
しても取り除くことができず、気泡の欠陥部となって成
形製品中に残るという欠点がある。However, as shown in Figure 3, when molding a product with a complex structure that has some undercuts,
Since the liquid resin is injected from the top, air is trapped near the gate 11 and the flanges 15, 16, causing a problem of air bubbles 13 forming defects in the molded product. In addition, since the air vent hole 12 provided at the top surface of the void 21 has a large diameter relative to the injection speed of the liquid resin, the flow resistance of the liquid resin is small and the air vent hole 12 provided at the top surface of the void 21 is small. The liquid resin flows out, forming an air pocket 14 at a portion slightly away from the air vent hole 12. This air pocket 14 cannot be removed no matter how much liquid resin is injected after filling the void 21 with liquid resin, and it has the drawback that it remains in the molded product as a bubble defect.
本発明は上述の点に鑑みてなされたもので、上記欠点を
除去し、成形製品に気泡等の欠陥部が発生しないレジン
インジェクション成形装置を提供することにある。The present invention has been made in view of the above-mentioned points, and it is an object of the present invention to provide a resin injection molding apparatus that eliminates the above-mentioned drawbacks and does not generate defects such as bubbles in molded products.
上記課題を解決するため本発明は、第１図に示すように
、成形用密閉型の空隙（２１）に液状の熱硬化性樹脂に
所定量の硬化剤を混合させてなる混合液状レジンを供給
充填しプラスチック製品を成形するレジンインジェクシ
ョン成形装置において、成形用密閉型の空隙（２１）の
最下部（２１−１，２ｌ−３）及び独立島状底部（２１
−２）のそれぞれに混合液状レジンを注入する注入口（
２２）を設けたことを特徴とする。In order to solve the above problems, the present invention supplies a mixed liquid resin made by mixing a liquid thermosetting resin with a predetermined amount of a curing agent into the cavity (21) of a closed mold for molding, as shown in FIG. In a resin injection molding device for filling and molding plastic products, the lowest part (21-1, 2l-3) and independent island-like bottom part (21) of a closed molding cavity (21) are used.
-2) The injection port for injecting the mixed liquid resin into each of the holes (
22).
また、成形用密閉型の空隙（２１）の最上部（２１−４
，２ｌ−６）及び独立島状上部（２１−−５）にそれぞ
れ空隙（２１）内の空気を排出する細径の空気抜孔（２
３）を設けたことを特徴とする。In addition, the top (21-4) of the air gap (21) of the closed mold for molding is
, 2l-6) and the independent island-like upper part (21--5), each of which has a small diameter air vent hole (2
3).
更に、注入口（２２）と空気抜孔（２３）が相対的にず
れた位置関係にあることを特徴とする。Furthermore, it is characterized in that the injection port (22) and the air vent hole (23) are in a relatively shifted positional relationship.
上記の如く構成することにより、空隙（２１）の最下部
（２１−１，２ｌ−３）及び独立島状底部（２１−２）
のそれぞれに注入口（２２）を設けるので、混合液状レ
ジンを注入する際、混合液状レジンの乱流を生じること
なく注入できるから、空隙２１内の空気を混合液状レジ
ン内に巻き込むことがない。By configuring as described above, the lowest part (21-1, 2l-3) and the independent island-like bottom part (21-2) of the void (21)
Since the injection port (22) is provided in each of the inlets, the mixed liquid resin can be injected without causing a turbulent flow of the mixed liquid resin, so that the air in the gap 21 is not drawn into the mixed liquid resin.
最上部（２１−４，２ｌ−６）及び独立島状上部（２１
−−５）にそれぞれ細径の空気抜孔（２３）を設けるの
で、空隙（２１）に注入され混合液状レジンの液面に僅
かな空気圧が作用し、液面が均一に上昇するから空隙（
２１）内の空気を混合液状レジン内に巻き込むことなく
、この空気をスムーズに外部に排出することができる。Top part (21-4, 2l-6) and independent island-like top part (21
--5) are each provided with a small diameter air vent hole (23), so a slight air pressure acts on the liquid level of the mixed liquid resin injected into the gap (21), and the liquid level rises uniformly.
21) This air can be smoothly discharged to the outside without being drawn into the mixed liquid resin.
また、注入口（２２）と空気抜孔（２３）が相対的にず
れた位置関係にあるから、注入口（２２）から空気抜孔
（２３）に至るまでの混合液状レジンの流動長は各部で
略均−となる。In addition, since the inlet (22) and the air vent hole (23) are in a relatively shifted position, the flow length of the mixed liquid resin from the inlet (22) to the air vent hole (23) is approximately It becomes even.
以下、本発明の一実施例を図面に基づいて説明する。 Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図は本発明に係るレジンインジェクション成形装置
の成形用型部分を示す図で、同図（ａ）は正断面図、同
図（ｂ）は同図（ａ）のＡ−Ａ線上断面図である。同図
は”第３図と同様一部にアンダーカットを有する製品を
成形するための成形用型部分を示し、第３図と同一符号
を付した部分は同−又は相当部分を示す。FIG. 1 is a diagram showing a mold portion of a resin injection molding apparatus according to the present invention, in which (a) is a front sectional view, and (b) is a sectional view taken along the line A-A in (a). It is. This figure shows a mold part for molding a product having a partial undercut similar to that shown in FIG. 3, and parts given the same reference numerals as those in FIG.
図示するように、上型１７と下型１８及び中子型１９で
構成される成形用密閉型で形成される製品の形状を有す
る空隙２１の最下部２１−１．２１−３及び独立島状底
部２１−２の混合液状レジンインを注入する注入口２２
．・・・・を形成している。また、空隙２１の最上部２
１−４．２１−６及び独立島状上部２１−５に空隙２１
内の空気を排出する細径の空気抜孔２３を形成している
。また、注入口２２と空気抜孔２３とは相対的にずれた
位置関係にある。As shown in the figure, the lowest part 21-1, 21-3 of the cavity 21 having the shape of a product formed by a closed mold for molding consisting of an upper mold 17, a lower mold 18, and a core mold 19, and an independent island shape. Inlet 22 for injecting the mixed liquid resin in the bottom part 21-2
．． It forms... In addition, the top 2 of the void 21
1-4.21-6 and an air gap 21 in the independent island-like upper part 21-5
A small diameter air vent hole 23 is formed to discharge the air inside. Further, the injection port 22 and the air vent hole 23 are in a relatively shifted positional relationship.
なお、空隙２１にはガラス繊維等の補強材が予め充填さ
れている。Note that the void 21 is filled in advance with a reinforcing material such as glass fiber.
上記構成の成形用型を有するレジンインジェクション成
形装置において、注入口２２から不飽和ポリエステル等
の熱硬化性の低粘度の液状レジンにメチルエチルケトン
パーオキサイド等からなる硬化剤と連続的に定量混合さ
せてなる混合液状レジン注入する。この混合液状レジン
注入は、空隙２１の最下部２１−１ 、２１−３及び独
立島状底部２１−２から注入されていくので、混合液状
レジン内に乱流が発生することなく、空隙２１内にこの
乱流による空気の巻き込みが発生することはない、又は
空気抜孔２３の径は例えば１１６ｉ、ｓ〜φ３Ｉ！Ｉ！
ｌというような細い孔としているので、空隙２１に注入
された混合液状レジンの液面に僅かな空気圧が作用し、
液面が均一に上昇して、空隙２１内の空気は混合液状レ
ジンに巻き込まれることなく、空気抜孔２３からスムー
ズに外部に排出きれる。また、注入口２２．・・・・と
空気抜孔２３゜・・・・は相対的にずれた位置関係にあ
るので、混合液状レジンが注入口２２から空気抜孔２３
までに至る流動経路長さ、即ち流動長が略均−となり、
空気や注入きれる混合液状レジンの乱れ流がなく、空気
の巻き込みが更に発生しがたくなる。In a resin injection molding apparatus having a mold configured as described above, a thermosetting low-viscosity liquid resin such as unsaturated polyester is continuously mixed in a quantitative manner with a curing agent such as methyl ethyl ketone peroxide through the injection port 22. Inject mixed liquid resin. This mixed liquid resin is injected from the lowest parts 21-1 and 21-3 and the independent island-like bottom part 21-2 of the gap 21, so that no turbulence occurs in the mixed liquid resin. Air entrainment due to this turbulent flow does not occur, or the diameter of the air vent hole 23 is, for example, 116i, s~φ3I! I!
Since the holes are small in size, a slight air pressure acts on the liquid level of the mixed liquid resin injected into the void 21.
The liquid level rises uniformly, and the air in the gap 21 can be smoothly exhausted to the outside from the air vent hole 23 without being caught up in the mixed liquid resin. In addition, the injection port 22. ... and the air vent hole 23°... are in a relatively shifted positional relationship, so the mixed liquid resin flows from the injection port 22 to the air vent hole 23.
The length of the flow path, that is, the flow length, is approximately equal to
There is no turbulent flow of air or mixed liquid resin that can be completely injected, making it even more difficult for air to become trapped.
なお、空隙２１の各上部の高さが異なり一部の空気抜孔
２３より樹脂が上型１７上面に溢れる場合は未充填部で
空気圧を射出圧のバランスが崩れないようにすると同時
に充填を助長するため、−部の空気抜孔２３に栓をする
ことも行なわれる。In addition, if the height of each upper part of the cavity 21 is different and the resin overflows to the upper surface of the upper mold 17 from some air vent holes 23, the air pressure in the unfilled part is adjusted to prevent the balance of injection pressure from being lost and at the same time to promote filling. Therefore, the air vent hole 23 at the negative portion is also plugged.
以上説明したように本発明のレジンインジェクション成
形装置は下記■〜■のような作用を奏するから、従来の
レジンインジェクション成形装置では成形が難しい比較
的複雑な形状の構造部品及び機能部品等の成形製品に気
泡等の欠陥を発生させることなく容易に成形できるとい
う優れた効果かえられる。As explained above, the resin injection molding device of the present invention has the following effects, so it can be used to mold products such as structural parts and functional parts with relatively complex shapes that are difficult to mold with conventional resin injection molding devices. This has the advantage that it can be easily molded without producing defects such as bubbles.
■空隙の最下部及び独立島状底部のそれぞれに注入口を
設けるので、混合液状レジンを注入する際、混合液状レ
ジンの乱流を生じることなく注入できるから、空隙内の
空気を混合液状レジン内に巻き込むことがない。■Injection ports are provided at the bottom of the gap and at the bottom of the independent island, so when injecting the mixed liquid resin, it can be injected without creating a turbulent flow of the mixed liquid resin, so the air in the gap can be poured into the mixed liquid resin. I don't get caught up in it.
■最上部及び独立島状上部にそれぞれ細径の空気抜孔を
設けるので、空隙に注入され混合液状レジンの液面に僅
かな空気圧が作用し、液面が均一に上昇するから空隙内
の空気を混合液状レジン内に巻き込むことなく、このた
め空気をスムーズに外部に排出することができる。■Since small diameter air vent holes are provided at the top and independent island-like tops, a slight air pressure acts on the liquid level of the mixed liquid resin that is injected into the void, and the liquid level rises uniformly, allowing the air in the void to be removed. Therefore, the air can be smoothly discharged to the outside without getting caught up in the mixed liquid resin.
■注入口と空気抜孔が相対的にずれた位置関係にあるか
ら、混合液状レジンの流動長さは各部で略均−となり空
気及び液状レジンの乱流がなくなる。(2) Since the injection port and the air vent hole are in a relatively shifted position, the flow length of the mixed liquid resin is approximately equal in each part, and turbulent flow of air and liquid resin is eliminated.
第１図は本発明に係るレジンインジェクション成形装置
の成形用型部分を示す図で、同図（ａ）は正断面図、同
図（ｂ）は同図（ａ）のＡ−Ａ線上断面図、第２図は従
来のレジンインジェクション成形装置の成形用型部分を
示す図、第３図も従来のレジンインジェクション成形装
置の成形用型部分を示す図である。
図中、１７・・・・上型、１８・・・・下型、１９・・
・・中子型、２１・・・・空隙、２２・・・・注入口、
２３・・・・空気抜孔。
輩FIG. 1 is a diagram showing a mold portion of a resin injection molding apparatus according to the present invention, in which (a) is a front sectional view, and (b) is a sectional view taken along the line A-A in (a). , FIG. 2 is a diagram showing a mold portion of a conventional resin injection molding device, and FIG. 3 is a diagram also showing a mold portion of a conventional resin injection molding device. In the figure, 17...upper mold, 18...lower mold, 19...
... core mold, 21 ... void, 22 ... injection port,
23...Air vent hole. fellow
Claims (3)
量の硬化剤を混合させてなる混合液状レジンを供給充填
しプラスチック製品を成形するレジンインジェクション
成形装置において、前記成形用密閉型の空隙の最下部及
び独立島状底部のそれぞれに混合液状レジンを注入する
注入口を設けたことを特徴とするレジンインジェクショ
ン成形装置。(1) In a resin injection molding apparatus that molds a plastic product by supplying and filling a mixed liquid resin made by mixing a liquid thermosetting resin with a predetermined amount of a curing agent into the gap of a closed mold, the closed mold A resin injection molding device characterized in that an injection port for injecting a mixed liquid resin is provided in each of the lowermost part of the gap and the independent island-like bottom part.
部に前記空隙内の空気を排出する細径の空気抜孔を設け
たことを特徴とする請求項（１）記載のレジンインジェ
クション成形装置。(2) Resin injection molding according to claim (1), characterized in that a small-diameter air vent hole for discharging air in the void is provided at the top of the void and an independent island-like upper part of the closed mold for molding. Device.
にあることを特徴とする請求項（２）記載のレジンイン
ジェクション成形装置。(3) The resin injection molding apparatus according to claim (2), wherein the injection port and the air vent hole are in a relatively shifted positional relationship.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63049146A JPH01221216A (en) | 1988-03-01 | 1988-03-01 | Resin injection molding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63049146A JPH01221216A (en) | 1988-03-01 | 1988-03-01 | Resin injection molding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01221216A true JPH01221216A (en) | 1989-09-04 |
Family
ID=12822951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63049146A Pending JPH01221216A (en) | 1988-03-01 | 1988-03-01 | Resin injection molding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01221216A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008081654A1 (en) | 2007-01-05 | 2008-07-10 | Ngk Insulators, Ltd. | Method for manufacturing sealing honeycomb structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5772840A (en) * | 1980-10-25 | 1982-05-07 | Hitachi Ltd | Mold for reactive injection molding |
| JPS5795432A (en) * | 1980-12-05 | 1982-06-14 | Hitachi Ltd | Mold structure for reaction injection molding |
-
1988
- 1988-03-01 JP JP63049146A patent/JPH01221216A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5772840A (en) * | 1980-10-25 | 1982-05-07 | Hitachi Ltd | Mold for reactive injection molding |
| JPS5795432A (en) * | 1980-12-05 | 1982-06-14 | Hitachi Ltd | Mold structure for reaction injection molding |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008081654A1 (en) | 2007-01-05 | 2008-07-10 | Ngk Insulators, Ltd. | Method for manufacturing sealing honeycomb structure |
| US7638086B2 (en) | 2007-01-05 | 2009-12-29 | Ngk Insulators, Ltd. | Manufacturing method of plugged honeycomb structure |
| JP5345400B2 (en) * | 2007-01-05 | 2013-11-20 | 日本碍子株式会社 | Method for manufacturing plugged honeycomb structure |
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