JPH03244814A - Molded body having self-tapping insertion part and manufacturing method therefor - Google Patents
Molded body having self-tapping insertion part and manufacturing method thereforInfo
- Publication number
- JPH03244814A JPH03244814A JP3836990A JP3836990A JPH03244814A JP H03244814 A JPH03244814 A JP H03244814A JP 3836990 A JP3836990 A JP 3836990A JP 3836990 A JP3836990 A JP 3836990A JP H03244814 A JPH03244814 A JP H03244814A
- Authority
- JP
- Japan
- Prior art keywords
- self
- tapping
- insertion part
- thermosetting resin
- molding
- 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
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 238000003780 insertion Methods 0.000 title abstract 6
- 230000037431 insertion Effects 0.000 title abstract 6
- 229920005989 resin Polymers 0.000 claims abstract description 28
- 239000011347 resin Substances 0.000 claims abstract description 28
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 23
- 238000000465 moulding Methods 0.000 claims abstract description 16
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 abstract description 14
- 238000001746 injection moulding Methods 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 abstract description 3
- 238000001721 transfer moulding Methods 0.000 abstract description 2
- 229910001369 Brass Inorganic materials 0.000 description 6
- 239000010951 brass Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920006337 unsaturated polyester resin Polymers 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は、セルフタップ可能なインサート部品を有する
成形体及びその製法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a molded article having a self-tapping insert part and a method for manufacturing the same.
［従来の技術］
従来、熱硬化性樹脂にセルフタップを行う（すなわち、
雄ネジを締付けることにより、雌ネジ切りを行う）こと
は、材料の特性上引抜き力、引抜きトルク、繰返し締付
は等の問題により、あまり実例がな（、そのため真鍮で
、雌ネジを製作し、それを一体成形することによって、
機械的物性値を満足させることが知られている。[Prior Art] Conventionally, thermosetting resins are self-tapped (i.e.,
Cutting a female thread by tightening a male thread is rarely practical due to issues such as the pull-out force, pull-out torque, and repeated tightening due to the characteristics of the material. , by integrally molding it,
It is known to satisfy mechanical properties.
［発明が解決しようとする課題］
真鍮ねじを一体成形する方法においては、あらかじめ真
鍮ねじな実際の成形品の肉厚よりも大きく製作しておき
、それを一体成形することによって真鍮が成形品の肉厚
まで潰され、樹脂の流動時、真鍮の雌ネジ部に樹脂の流
れ込みを防止する方法がとられていた。しかしこの成形
方法であると真鍮が潰されるため、雌ネジの通り、止−
りの不良が発生し、成形後、必らずタッブ及びネジ検が
必要とされている、等の問題を有していた。[Problems to be Solved by the Invention] In the method of integrally molding brass screws, the thickness of the brass screw is manufactured in advance to be larger than the actual molded product, and by integrally molding it, the brass screw becomes thicker than the molded product. A method was used to prevent the resin from flowing into the female threaded part of the brass when the resin was crushed to the wall thickness. However, with this forming method, the brass is crushed, so the female thread can be passed through and stopped.
This has led to problems such as poor molding and the need to inspect tabs and screws after molding.
［課題を解決するための手段］
本発明は、前述の問題点を解決すべくなされたものであ
り、熱硬化性樹脂成形体と、熱可塑性樹脂製セルフタッ
プ可能なインサート部品を一体成形してなるものであり
、熱硬化性樹脂と一体成形することによって雌ネジの繰
返し締付け、引抜き力、引抜きトルク、締付は力を著し
く向上させることができるとともに雌ネジ部がセルフタ
ップとなるので、後工程であるネジ検査工程を省（こと
ができる等の利点を有するものである。[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems, and includes integrally molding a thermosetting resin molded body and a thermoplastic resin self-tapping insert part. By integrally molding it with thermosetting resin, the repeated tightening, pulling force, pulling torque, and tightening force of the female thread can be significantly improved, and the female thread part is self-tapping, so it can be easily tightened later. This has the advantage that the screw inspection process, which is a process, can be omitted.
熱硬化性樹脂成形体と熱可塑性樹脂製セルフタップ可能
なインサート部品を一体成形させるためには、熱可塑性
樹脂の材料特性が重要である。まず第１に熱的性質であ
るが、熱硬化性樹脂が発熱硬化する時１５０〜２００℃
の内部発熱が発生する。そのため、その温度に耐えられ
る物性が必要であるのと同時に、熱膨張係数が熱硬化性
樹脂と熱可塑性樹脂で近似値を示していることが重要で
ある。上記要因を満していない材料を選定すると、熱硬
化性樹脂と熱可塑性樹脂の一体成形時、熱可塑性樹脂が
変質したり、成形後、膨張係数の差で隙間が発生し、位
置精度に悪影響をもたらす、第２に機械的物性値であり
、引張強さ、１５００ｋｇｆ／ｃｍ”以上、伸び率３％
以下、曲げ弾性率１００．０００ｋｇｆ／ｃ＋ｎ”以上
、圧縮強さ（１％変形時） １００１００Ｏ／ａｍ”以
上の物性値を満足し、尚かつ、第１の要因を満足した、
熱可塑性樹脂であれば、ポリアミド、ポリエステル、ポ
リオレフィン等あらゆるものが採用可能である。特にガ
ラス繊維等の繊維強化ボ１ルアミドが好ましい。第３に
熱可塑性樹脂成形品の形状であるが、ネジ締付は時の回
り止め（熱硬化性樹脂と接している面積の１０％以上）
かつ引抜き止め（熱硬化性樹脂と接している面積の７％
以上）、押圧力止め（熱硬化性樹脂と接している面積の
３０％以上）のアンダーカット形状を有したものが好ま
しい。例えば第１〜５図のような形状のものを成形しこ
れを用いて、熱硬化性樹脂と一体成形すれば著しく熱硬
化性樹脂成形品のセルフタップ強度は向上する。In order to integrally mold a thermosetting resin molded body and a thermoplastic resin self-tapping insert part, the material properties of the thermoplastic resin are important. First of all, it has thermal properties, and when thermosetting resin is cured by heat, the temperature is 150 to 200℃.
Internal heat generation occurs. Therefore, it is important that the thermosetting resin and the thermoplastic resin have similar thermal expansion coefficients, as well as requiring physical properties that can withstand such temperatures. If you select a material that does not meet the above factors, when the thermosetting resin and thermoplastic resin are integrally molded, the thermoplastic resin may change in quality, or gaps may occur due to the difference in expansion coefficient after molding, which will have a negative impact on positional accuracy. The second mechanical property value is tensile strength, 1500 kgf/cm" or more, elongation rate 3%.
Below, the physical property values of flexural modulus of elasticity of 100.000 kgf/c+n" or more and compressive strength (at 1% deformation) of 100,100 O/am" or more are satisfied, and the first factor is satisfied.
Any thermoplastic resin such as polyamide, polyester, polyolefin, etc. can be used. In particular, fiber-reinforced bolamamide such as glass fiber is preferred. Thirdly, regarding the shape of the thermoplastic resin molded product, the screws must be tightened to prevent rotation (at least 10% of the area in contact with the thermosetting resin).
and pull-out prevention (7% of the area in contact with thermosetting resin)
(above), those having an undercut shape of a pressing force stop (30% or more of the area in contact with the thermosetting resin) are preferable. For example, if a shape as shown in FIGS. 1 to 5 is molded and then integrally molded with a thermosetting resin, the self-tapping strength of the thermosetting resin molded product will be significantly improved.
本発明のセルフタップ可能なインサート部品を有する成
形体の製法としては以下のごとき、射出成形あるいはト
ランスファー成形方法を応用することが好ましい。すな
わちセルフタップ可能な熱可塑性樹脂製インサート部品
を射出成形型の下型に載置し、上型を閉じて上型、下型
でインサート部品を囲むキャビティを形成した後、キャ
ビティ内へ熱硬化性樹脂を注入して、インサート部品と
熱硬化性樹脂を一体成形する方法である。インサート部
品は、前記一体成形品を脱型して取り出した後、セルフ
タップして雌ネジが形成されるものである。As a method for manufacturing the molded article having a self-tappable insert part of the present invention, it is preferable to apply the injection molding or transfer molding method as described below. In other words, a self-tapping thermoplastic resin insert is placed in the lower mold of an injection mold, the upper mold is closed, a cavity is formed around the insert by the upper mold and the lower mold, and then a thermosetting resin is inserted into the cavity. This is a method in which the insert part and thermosetting resin are integrally molded by injecting resin. The insert component is one in which a female thread is formed by self-tapping after the integrally molded product is demolded and taken out.
熱硬化性樹脂としては、不飽和ポリエステル樹脂、フェ
ノール樹脂、ユリア樹脂、メラミン樹脂、アルキッド樹
脂、エポキシ樹脂等から選ぶことができ、特にこれら樹
脂にガラス繊維、炭素繊維等の補強繊維を混入したもの
が好ましい。さらに好ましくは、不飽和ポリエステル樹
脂に各種充填剤、触媒、離型剤、化学増粘剤等を混合し
た樹脂ペーストにガラスチョツプドストランドを加えて
混練したいわゆるＢＭＣである。Thermosetting resins can be selected from unsaturated polyester resins, phenolic resins, urea resins, melamine resins, alkyd resins, epoxy resins, etc. In particular, these resins are mixed with reinforcing fibers such as glass fibers and carbon fibers. is preferred. More preferably, so-called BMC is obtained by adding glass chopped strands to a resin paste obtained by mixing unsaturated polyester resin with various fillers, catalysts, mold release agents, chemical thickeners, etc. and kneading the mixture.
［実施例］
本発明の製法に従い、ガラス繊維強化ポリアミド製イン
サート部品とＢＭＣとを一体成形した後、以下の測定を
行った。第１−２図にインサート部品の形状を示す。第
１図の場合、締付はトルク１５ｋｇｆ、 ａｍ以上（真
鍮製の雄ネズ破壊のため測定不可）引抜きカフ９．５ｋ
ｇｆ 引抜きトルク １２．１ｋｇｆ、ｃｍ 、繰返
し締付は回数２０回以上、（毎回１３ｋｇｆ、 ａｍで
締付は時）［使用ネジサイズ＝Ｍ３］、第２図の場合、
締付はトルク１３ｋｇｆ、 ｃｍ、引抜き力５８ｋｇｆ
引抜きトルク９ｋｇｆ、ｃｍ繰返し締付は回数２０回以
上（毎回１０ｋｇｆ、 ｃｒｎで締付は時）［使用ネジ
サイズ＝Ｍ３］であり、充分に強度を有するものであっ
た。[Example] After a glass fiber-reinforced polyamide insert part and a BMC were integrally molded according to the manufacturing method of the present invention, the following measurements were performed. Figures 1-2 show the shape of the insert part. In the case of Fig. 1, the tightening torque is 15 kgf, am or more (cannot be measured because the brass male thread is broken), and the pull-out cuff is 9.5 kg.
gf Pulling torque 12.1 kgf, cm, repeated tightening is 20 times or more (13 kgf, am each time) [screw size used = M3], in the case of Fig. 2,
Tightening torque: 13 kgf, cm, pulling force: 58 kgf
The pulling torque was 9 kgf, cm, and repeated tightening was performed over 20 times (10 kgf, crn each time) [screw size used = M3], and it had sufficient strength.
［発明の効果］
本発明の熱硬化性樹脂成形体と熱可塑性樹脂製セルフタ
ップ可能なインサート部品を一体成形してなる成形体は
、成形後の後工程を容易にし、特に光学部品やＯＡ機器
部品などのフレームには、ネジが多く使用されているた
め、これらの部品として極めて有効である。[Effects of the Invention] The molded product obtained by integrally molding the thermosetting resin molded product and the thermoplastic resin self-tapping insert part of the present invention facilitates post-processing after molding, and is particularly suitable for optical parts and OA equipment. Since many screws are used in the frames of parts, it is extremely effective for these parts.
第１〜５図は、セルフタップ雌ネジを形成するためのイ
ンサート部品の一例であり、図において１．３．５．７
．９は平面図、２．４．６．８．１０は側面図、である
。1 to 5 are examples of insert parts for forming self-tapping internal threads, and in the figures 1.3.5.7
．． 9 is a plan view, and 2.4.6.8.10 is a side view.
Claims (1)
可能なインサート部品が一体成形されてなるセルフタッ
プ可能なインサート部品を有する成形体。 ２、セルフタップ可能な熱可塑性樹脂製インサート部品
を下型に載置し、上型を閉じて上型、下型で成型キャビ
ティを形成した後、前記キャビティ内へ熱硬化性樹脂を
注入して、前記インサート部品と熱硬化性樹脂を一体成
形することを特徴とするセルフタップ可能なインサート
部品を有する成形体の製法。[Scope of Claims] 1. A molded article having a self-tapping insert part, which is formed by integrally molding a thermosetting resin molding and a self-tapping insert part made of a thermoplastic resin. 2. Place the self-tapping thermoplastic resin insert part on the lower mold, close the upper mold, form a molding cavity with the upper mold and the lower mold, and then inject thermosetting resin into the cavity. A method for producing a molded article having a self-tapping insert part, characterized in that the insert part and a thermosetting resin are integrally molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3836990A JPH03244814A (en) | 1990-02-21 | 1990-02-21 | Molded body having self-tapping insertion part and manufacturing method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3836990A JPH03244814A (en) | 1990-02-21 | 1990-02-21 | Molded body having self-tapping insertion part and manufacturing method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03244814A true JPH03244814A (en) | 1991-10-31 |
Family
ID=12523368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3836990A Pending JPH03244814A (en) | 1990-02-21 | 1990-02-21 | Molded body having self-tapping insertion part and manufacturing method therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03244814A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006292069A (en) * | 2005-04-11 | 2006-10-26 | Maru S Neji Seisakusho:Kk | Connecting structure of resin frame and screw shaft, nut used in the same, and method of disconnecting the same |
| JP2010229904A (en) * | 2009-03-27 | 2010-10-14 | Mitsubishi Electric Corp | Pump, heat pump type hot water supply device, and method for manufacturing pump |
| JP2010242624A (en) * | 2009-04-07 | 2010-10-28 | Mitsubishi Electric Corp | Pump, heat pump type hot-water supply device, and method of manufacturing pump |
-
1990
- 1990-02-21 JP JP3836990A patent/JPH03244814A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006292069A (en) * | 2005-04-11 | 2006-10-26 | Maru S Neji Seisakusho:Kk | Connecting structure of resin frame and screw shaft, nut used in the same, and method of disconnecting the same |
| JP2010229904A (en) * | 2009-03-27 | 2010-10-14 | Mitsubishi Electric Corp | Pump, heat pump type hot water supply device, and method for manufacturing pump |
| JP2010242624A (en) * | 2009-04-07 | 2010-10-28 | Mitsubishi Electric Corp | Pump, heat pump type hot-water supply device, and method of manufacturing pump |
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