JPS63172619A - Compression molding method - Google Patents
Compression molding methodInfo
- Publication number
- JPS63172619A JPS63172619A JP447187A JP447187A JPS63172619A JP S63172619 A JPS63172619 A JP S63172619A JP 447187 A JP447187 A JP 447187A JP 447187 A JP447187 A JP 447187A JP S63172619 A JPS63172619 A JP S63172619A
- Authority
- JP
- Japan
- Prior art keywords
- molding
- molding material
- mold
- pin
- force
- 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
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000000748 compression moulding Methods 0.000 title claims description 27
- 238000000465 moulding Methods 0.000 claims abstract description 62
- 239000012778 molding material Substances 0.000 claims abstract description 44
- 230000013011 mating Effects 0.000 description 4
- 239000004412 Bulk moulding compound Substances 0.000 description 3
- 239000003677 Sheet moulding compound Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- GNBHRKFJIUUOQI-UHFFFAOYSA-N fluorescein Chemical compound O1C(=O)C2=CC=CC=C2C21C1=CC=C(O)C=C1OC1=CC(O)=CC=C21 GNBHRKFJIUUOQI-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression 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）
本発明ハ、シートモールディングコンパウンド（ＳＭＣ
）やバルクモールディングコンパウンド（ＢＭＣ）等の
圧縮成形方法に関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention iii) Sheet molding compound (SMC)
), bulk molding compound (BMC), etc.
（従来の技術）
従来、ＳＭＣおよびＢＭＣ等の圧縮成形方法には基本的
に「７ラツシ工式」と「ポジティブ式」に大別される◎
これらを概略説明すると、「フラッシュ式」の圧縮成形
方法は例えば第５図の模式図で示すような圧縮成形金型
を用いて行なうものであって、下型１に過剰の成形材料
２をセツティングし、上型３を下降させて成形材料２１
に圧縮するときに成形材料２の過剰分を両金型１，３０
合わせ目４から外部へ流出させて成形を行なうものであ
る。この方法では、材料の秤１を正確に行なう必要がな
く、また使用する金型の損傷が少なく寿命が長いという
利点がある〇
「ポジティブ式」の圧縮成形方法は例えば第６図の模式
図で示すような圧縮成形金型を用いて行なうものであり
、下型１ａに成形材料２′ｔ−セツティングした層、上
型３ａを下型１ａの内面に摺接させて下降させ成形材料
２全圧縮する。(Prior art) Conventionally, compression molding methods such as SMC and BMC are basically divided into two types: the "7-lash method" and the "positive method." A brief explanation of these is the "flash method" compression molding method. The method is carried out using, for example, a compression molding mold as shown in the schematic diagram of FIG.
When compressing the excess molding material 2 into both molds 1 and 30
Molding is performed by flowing out from the seam 4 to the outside. This method does not require accurate weighing of the material, and has the advantage that the mold used is less likely to be damaged and has a longer lifespan.The "positive type" compression molding method is shown in the schematic diagram in Figure 6, for example. The compression molding is carried out using a compression molding mold as shown in FIG. Compress.
この方法では、圧力損失が少なく密度の篩い成形品が得
られるという利点がある。This method has the advantage that a dense sieve molded product can be obtained with little pressure loss.
また１本出願人より特開昭６０−２４７５１６号公報で
圧縮成形方法の他の方法を開示しており。In addition, another compression molding method has been disclosed by the same applicant in Japanese Patent Application Laid-Open No. 60-247516.
これは第７図で示すように、下型１ｂと上型３ｂとの間
に形成される成形空間部５に成形材料２をセツティング
し、上型３ｂを下型１ｂに閉じ合わせる際に、前記成形
空間部５内を真空引きしつつ圧縮成形する方法である０
なお、６が真空引きする装置である〇
（発明が解決しようとする問題点ン
しかしながら、従来の圧縮成形方法では次のような問題
点を有していた。As shown in FIG. 7, when the molding material 2 is set in the molding space 5 formed between the lower mold 1b and the upper mold 3b and the upper mold 3b is closed to the lower mold 1b, 0, which is a method of performing compression molding while vacuuming the inside of the molding space 5.
Note that 6 is a device for vacuuming. (Problems to be Solved by the Invention) However, the conventional compression molding method had the following problems.
「フラッシュ式」の圧縮成形方法では下型１と上型３の
合わせ目４から過剰の成形材料２を流出させるため、成
形品に厚い横パリが生じるという問題点があった。さら
に、圧縮する圧力が成形材料に、一定に加わらないため
密度の高い成形品を得られないという問題点もあっ次〇
また、「ポジティブ式」の圧縮成形方法では上型５ａを
下型１ａに摺動させて成形材料２を圧縮するため、成形
材料２が摺動部７のクリアランスに流入し成形品のパリ
となるという問題点があった０さらに、流入する成形材
料により摺動面が摩耗してパリが厚くなったり、型に傷
がつき型寿命を短かくするという問題点もあったＯ
特開昭６０−２４７５１６号公報の圧縮成形方法では、
この方法を前記「フラッシュ式」および「ポジティブ式
」の成形方法に適用したとしても、ピンホール、７クレ
、ヤケ等の成形不良を防止することができるが、前記各
問題点は解決することができない。In the "flash type" compression molding method, excess molding material 2 flows out from the seam 4 between the lower mold 1 and the upper mold 3, so there is a problem in that thick horizontal ribs are produced in the molded product. Furthermore, there is the problem that high-density molded products cannot be obtained because compression pressure is not applied to the molding material at a constant rate.In addition, in the "positive type" compression molding method, the upper mold 5a is placed in the lower mold 1a. Since the molding material 2 is compressed by sliding, there is a problem that the molding material 2 flows into the clearance of the sliding part 7 and causes cracks in the molded product0.Furthermore, the sliding surface is abraded due to the molding material flowing in. The compression molding method disclosed in JP-A No. 60-247516 also had problems such as thickening of the mold and damage to the mold, shortening the mold life.
Even if this method is applied to the above-mentioned "flash type" and "positive type" molding methods, molding defects such as pinholes, cracks, and discoloration can be prevented, but each of the above problems cannot be solved. Can not.
本発明は１以上の問題点に鑑みてなされたものであり、
その目的とするところは、成形品にパリが生じることが
なく宜つ成形品の密度を高めることのできる圧縮成形方
法を提供することにある。The present invention has been made in view of one or more problems,
The purpose is to provide a compression molding method that can increase the density of a molded product without causing flakes in the molded product.
（問題点を解決するための手段）
以上の問題点を解決し目的を達成するための手段として
、上型と下型とが閉じ合わされた際に両金型の間に形成
される成形空間部を真空にするとともに、上型が移動し
て下型にセツティングされた成形材料を圧縮すると同時
に、下型に前記成形空間部へ出没可能に設けたピンを下
型の成形面より没入させて前記成形部材の一部をピンの
摺動孔へ流入させ、続いて前記上型のストローク下死点
において前記ピンを下型の成形面まで移動させて前記成
形材料を前記成形空間部内に充満させることｔ−特徴と
するものである。(Means for Solving the Problems) As a means for solving the above problems and achieving the purpose, the molding space formed between the upper mold and the lower mold when the upper mold and the lower mold are closed together. At the same time, the upper mold moves to compress the molding material set in the lower mold, and at the same time, a pin provided in the lower mold so as to be retractable into the molding space is recessed from the molding surface of the lower mold. A part of the molding member is caused to flow into the sliding hole of the pin, and then, at the bottom dead center of the stroke of the upper mold, the pin is moved to the molding surface of the lower mold to fill the molding space with the molding material. This is a characteristic.
（作用）
予じめ設定された製品Ｘｔ分だけの成形材料を成形空間
部にセツティングした後、上型が移動して成形材料を圧
縮すると同時にピンを下型の成形面より没入させると成
形空間内部が真空状態となっているため成形材料の一部
がピンの摺動孔に流入する０そのため、成形材料が下型
と上型との合わせ目から外部へ流出することなく型閉め
が行なえる０型閉めが終了する上型のストローク下死点
において再びピンを固定型の成形面まで移動させ摺動孔
内の成形材料を成形空間部内へ押し出し、成形空間部内
に成形材料を充満させる。このように下型と上型とが完
全に閉じたときに成形材料を成形空間内に充満させるた
め成形品にバＩＪ ’に発生させることがない。(Function) After setting the molding material for a preset amount of product Xt into the molding space, the upper mold moves to compress the molding material, and at the same time the pin is recessed from the molding surface of the lower mold to start molding. Since the inside of the space is in a vacuum state, some of the molding material flows into the pin sliding hole. Therefore, the mold can be closed without the molding material flowing out from the joint between the lower mold and the upper mold. At the bottom dead center of the stroke of the upper mold, where mold closing is completed, the pin is again moved to the molding surface of the fixed mold, and the molding material in the sliding hole is pushed out into the molding space, filling the molding space with the molding material. In this way, when the lower mold and the upper mold are completely closed, the molding space is filled with the molding material, so that there is no occurrence of burr IJ' in the molded product.
また、摺動孔内の成形材料をピンで成形空間内に押圧し
て充填させるため稠密な成形品が得られる。Further, since the molding material in the sliding hole is pressed and filled into the molding space with the pin, a dense molded product can be obtained.
（実施例） つぎに本発明の実施例を図面に基づいて説明する。(Example) Next, embodiments of the present invention will be described based on the drawings.
第２図に本実施例の一例を示し、この構成を説明する。An example of this embodiment is shown in FIG. 2, and its configuration will be explained.
なお、この圧縮成形金型は基本的には「フラッシュ式」
と同じ構造である〇上型８は、アクチェエータ９で上下
に移動自在な取付は板１０に固定されている０そして。This compression mold is basically a "flash type"
The upper die 8, which has the same structure as the above, is fixed to a plate 10 and is movable up and down by an actuator 9.
下型１１との合わせ側には成形材料を加圧する成形面８
ａと下型１１に当接して合わせ而（パーティング面〕を
構成する当接部８ｂが形成されている。A molding surface 8 for pressurizing the molding material is provided on the side mating with the lower mold 11.
A contact portion 8b is formed which contacts the lower die 11 and forms a parting surface.
下型１１は装置本体１２に固定されており。The lower mold 11 is fixed to the device main body 12.
上型８との会わせ側には成形材料を加圧する成形面１１
ａと上型８の当接部８ｂが当接する平担面１１ｂが形成
されている。そして、型閉め時に上型８の成形面８ ａ
’と下型１１の成形面１１ａとで成形空間部１５が形成
される。On the side that meets the upper mold 8, there is a molding surface 11 for pressurizing the molding material.
A flat surface 11b is formed on which the abutting portion 8b of the upper mold 8 abuts. Then, when the mold is closed, the molding surface 8 a of the upper mold 8
' and the molding surface 11a of the lower die 11 form a molding space 15.
また、下型１１には前記成形空間部１３を囲むように弾
性体からなるシール材１４が取付けられてあって、型閉
め時にシール材１４が上型８に当接して成形空間部１３
が密閉されるＯさらに、下型１１には排気通路１５が形
成されており、前記成形空間Ｎ５１３と図示しない真空
引き装置とを排気端路１５を介して接続して成形空間部
１３を真空圧することができる０つぎに１本発明の要部
であるピンについて説明する。なお、本実施例では成形
品を離型する突出しピンと兼用としている０
突出しピン１６は下型１１の摺動孔１１ｃに接摺して設
けられており、一端を突出しプレート１７に固定されて
、全ての突出しピン１６が同時に下型１１から成形空間
部１６へ出没できるようになっている。Further, a sealing material 14 made of an elastic material is attached to the lower mold 11 so as to surround the molding space 13, and when the mold is closed, the sealing material 14 comes into contact with the upper mold 8, thereby sealing the molding space 13.
Furthermore, an exhaust passage 15 is formed in the lower mold 11, and the molding space N513 is connected to a vacuum evacuation device (not shown) via the exhaust end passage 15 to apply vacuum pressure to the molding space 13. Next, the pin, which is the main part of the present invention, will be explained. In this embodiment, the ejector pin 16, which also serves as an ejector pin for releasing the molded product, is provided in contact with the sliding hole 11c of the lower mold 11, and has one end fixed to the ejector plate 17. All the ejecting pins 16 can be moved into and out of the molding space 16 from the lower die 11 at the same time.
突出しピン１６の作動は、成形品を下型１１から突出す
場合には油圧シリンダ１８によシ行なわれ、下型１１内
で微少寸法移動させる場合にはリンク機構１９で行なわ
れる・
この構成を詳細に説明すると、突出し叛１７には突出し
ロッド１７ａの一端が取付けられておｐ、その他端は可
動板２０を介してリンク機構１９に取付けられている０
リンク＠構１９は。The ejection pin 16 is operated by a hydraulic cylinder 18 when the molded product is ejected from the lower mold 11, and by a link mechanism 19 when the molded product is moved by a minute dimension within the lower mold 11. To explain in detail, one end of a protruding rod 17a is attached to the protruding rod 17, and the other end is attached to the link mechanism 19 via a movable plate 20.
Link @ structure 19 is.
サーボモータ２１によシ回転するネジ部２２と、ネジ部
２２に螺合してネジ部２２の回転により前後方向く図中
上下方向）に移動されるボールネジブロック２５と、ボ
ールネジブロック２５の移動に関連して前記可動板２０
を移動させるリンク２４，２５．２６とから構成されて
お夛、サーボモータ２１を作動させてボールネジブロッ
ク２３を上昇させることにより＠３図に示すように可動
板２０を下降させて突出しピン１６を下型１１の成形面
１ｆａよシ没入させる０つぎに１以上の構成の圧縮成形
金型を用いた圧縮成形方法を第１図を用いて説明する０
第１図（ａ）で示すように、成形材料２金製品重蛍分だ
けやや中央部を厚めにして下型１１の成形面１１ａ上に
セツティングする。なお、セツティングする成形材料２
の形状は、圧縮時に上型８と下型１１との合わせ面（パ
ーティング面λよシはみ出ないように予め実験により設
定しておく〇
上型８を下型１１に接近させて、上型８の成形面８ａが
成形材料２に接触すると同時に、下型１１に取付けられ
ているシール材１４が上型８に当接して成形空間部１５
を密閉する０そして、排気通路１５から成形空間部１３
内を脱気する。（第１図（ｂ））
さらに、上型８を移動させて成形材料２を圧縮すると同
時に、前記り／り機構１９を作動させて突出しピン１６
を下型１１内へ没入させるＯそれに伴ない突出しピン１
６の摺動孔１１Ｃに成形材料２の一部が分散して流入さ
れる０ （第１図（Ｃ））
つづいて、第１図（ｄ）で示すように、上型８０ストロ
一ク下死点において、リンク機構１９により再び突出し
ピン１６を下型１１の成形面１１ａまで移動させ摺動孔
１１ｃ内の成′形材料を成形空間部１３内へ押し出して
充満させる＠このとき、上型８と下型１１の合わせ面（
パーティング面）を構成する上型８の当接部８ｂと下型
１１の平担部１１ｂは型閉め力の強い力で押えられてい
るため１合わせ面に成形材料が流入することがなく成形
品にパリが生じない・
そして、この型閉め状態で金型に設けられた硬化装置（
成形材料が熱硬化性のものであれば加熱装置、熱可塑性
のものであれば冷却装置ンにより圧縮された成形材料を
硬化させる。A threaded portion 22 rotated by a servo motor 21, a ball screw block 25 that is screwed onto the threaded portion 22 and is moved forward and backward (up and down in the figure) by the rotation of the threaded portion 22; Relatedly, the movable plate 20
By operating the servo motor 21 to raise the ball screw block 23, the movable plate 20 is lowered to move the protruding pin 16 as shown in Figure 3. A compression molding method using a compression molding mold having one or more configurations will be described below with reference to FIG. 1.
As shown in FIG. 1(a), the molding material is set on the molding surface 11a of the lower mold 11 with the central part made slightly thicker by the weight of the heavy fluorescein of the two-metal molding material. In addition, the molding material 2 to be set
The shape of the upper mold 8 and the lower mold 11 should be set in advance through experiments so that they do not protrude beyond the mating surface (parting surface λ) during compression. At the same time that the molding surface 8 a of the molding surface 8 a contacts the molding material 2 , the sealing material 14 attached to the lower mold 11 contacts the upper mold 8 and the molding space 15
Then, from the exhaust passage 15 to the molding space 13
Evacuate the inside. (FIG. 1(b)) Further, at the same time as moving the upper mold 8 to compress the molding material 2, the re/rip mechanism 19 is operated to remove the ejecting pin 16.
is immersed into the lower mold 11, and the ejecting pin 1
A part of the molding material 2 is dispersed and flows into the sliding hole 11C of 6 (Fig. 1 (C)). Next, as shown in Fig. 1 (d), the upper mold 80 is lowered by one stroke At the dead point, the link mechanism 19 moves the ejecting pin 16 again to the molding surface 11a of the lower mold 11 to push the molding material in the sliding hole 11c into the molding space 13 and fill it. 8 and the mating surface of the lower mold 11 (
The contact portion 8b of the upper mold 8 and the flat portion 11b of the lower mold 11, which constitute the parting surface), are held down by a strong mold closing force, so that the molding material does not flow into the mating surface and the molding is completed. There will be no cracks on the product. Then, in this mold closed state, the curing device installed in the mold (
The compressed molding material is hardened by a heating device if the molding material is thermosetting, or by a cooling device if it is thermoplastic.
このようにして、成形材料２が圧縮成形されると第１図
（ｅ）で示すように上型８が移動した後。After the molding material 2 is compression-molded in this way, the upper mold 8 moves as shown in FIG. 1(e).
第２図で示した油圧シリンダ１８が作動して突出しピン
１６を大きく移動させて成形品２７を下型１１から離型
させる◇
以上のようにして、圧縮成形を行なうことによシ成形品
にパリが生じることを防止でき、さらに、突出しビ／１
６により摺動孔１１ａ内の成形材料を成形空間部１３内
へ押し出すようにしたため均一で稠密な成形品を成形す
ることができる。The hydraulic cylinder 18 shown in FIG. 2 operates to move the ejector pin 16 greatly and release the molded product 27 from the lower mold 11 ◇ By performing compression molding as described above, the molded product is It is possible to prevent the occurrence of flashing, and furthermore, it is possible to prevent
Since the molding material in the sliding hole 11a is pushed out into the molding space 13 by the molding member 6, a uniform and dense molded product can be molded.
本実施例では、本発明の圧縮成形方法に用いるピンと突
出しピンとを兼用させているため。In this embodiment, the pin used in the compression molding method of the present invention and the ejecting pin are also used.
部品点数を減らすことができ金型コストの低減が図れる
ものである。The number of parts can be reduced and mold costs can be reduced.
第４肉は１本発明を「ポジティブ式」の圧縮成形金型に
適用した一例であり、下型１１の成形Ｉ′ｉ！［１１１
ａを形成する凸部１１ｄの外面に上型８の成形部８ａを
形成する凹部８ｄの内面を摺接させたものであり、他は
前述の実施例と同一の構成である。The fourth piece is an example of applying the present invention to a "positive type" compression molding mold, and the molding I'i of the lower mold 11! [111
The inner surface of the recess 8d forming the molding part 8a of the upper die 8 is brought into sliding contact with the outer surface of the protrusion 11d forming the molding part 8a, and the other structure is the same as that of the previous embodiment.
なお１本実施例においては、突出しピン１６の作動をリ
ンク機構１８で制御しているが、これに限定されること
はなく、他の電気、４４械。Note that in this embodiment, the operation of the ejecting pin 16 is controlled by the link mechanism 18, but the invention is not limited to this, and other electrical machines may be used.
油空圧等の手段によシ制御することもできる。It can also be controlled by means such as hydraulics and pneumatics.
（発明の効果ン
以上詳細に説明したように本発明は、成形空間部内を真
空にするとともに、上型による成形材料の圧縮時に下型
に設けたピンを下型に没入させその摺動孔に成形材料の
一部を流入させ、さらに上型のストローク下死点におい
てピンを再び移動させて摺動孔内の成形材料を成形空間
部内に押し出して充満させるようにしたため。(Effects of the Invention) As explained in detail above, the present invention creates a vacuum in the molding space, and when the molding material is compressed by the upper mold, the pin provided in the lower mold is inserted into the lower mold, and the pin is inserted into the sliding hole of the lower mold. This is because a part of the molding material is allowed to flow in, and the pin is moved again at the bottom dead center of the stroke of the upper mold to push out the molding material in the sliding hole into the molding space and fill it.
成形される成形品にパリヲ生じさせることがなく、さら
に稠密な成形品が成形できる。It does not cause paris in the molded product, and it is possible to mold a denser molded product.
そのため、パリ取シ工程が削減でき製造コストの大巾な
低減が図れ、宜つ品質の良い成形品が提供できるという
効果を奏する。Therefore, the deburring process can be reduced, manufacturing costs can be significantly reduced, and molded products of high quality can be provided.
第１図（ａ） ｔ （ｂ） Ｆ （Ｃ） 、 （ｄ）
＃ （ｅ）は１本発明の圧縮成形方法の一例を説明する
ために圧縮成形金型の経時的な作動状態を順次示した金
型の縦断面図。
第２図は、本発明に係る圧縮成形金型の一例を示す縦断
面図、
第６図は、第２図の作動状態を示す縦断面図。
第４図は、本発明をフラッシュ式の圧縮成形金型に適用
した一例を示す圧縮成形金型の縦断面図。
ｉ！ｇ５図乃至第７図は、従来の圧縮成形金型の一例を
示す縦ＷＴ面図である。
８・・・上型
１１・・・下型
１１ａ・・・成形部
１１ｃ・・・摺動孔
１３・・・成形空間部
１６・・・ピン（突出しピン）
特許出願人 トヨタ自動車株式会社
第１図
第２図
第３図Figure 1 (a) t (b) F (C), (d)
#(e) is a vertical sectional view of a compression molding mold sequentially showing the operating state of the compression molding mold over time to explain an example of the compression molding method of the present invention. FIG. 2 is a longitudinal sectional view showing an example of a compression molding mold according to the present invention, and FIG. 6 is a longitudinal sectional view showing the operating state of FIG. 2. FIG. 4 is a longitudinal cross-sectional view of a compression molding mold showing an example of applying the present invention to a flash type compression molding mold. i! Figures g5 to 7 are longitudinal WT views showing an example of a conventional compression molding die. 8... Upper die 11... Lower die 11a... Molding part 11c... Sliding hole 13... Molding space 16... Pin (protruding pin) Patent applicant Toyota Motor Corporation No. 1 Figure 2 Figure 3
Claims (1)
形成される成形空間部を真空にするとともに、上型が移
動して下型にセッティングされた成形材料を圧縮すると
同時に、下型に前記成形空間部へ出没可能に設けたピン
を下型の成形面より没入させて前記成形材料の一部をピ
ンの摺動孔へ流入させ、続いて前記上型のストローク下
死点において前記ピンを下型の成形面まで移動させて前
記成形材料を前記成形空間部内に充満させることを特徴
とする圧縮成形方法。(1) When the upper and lower molds are closed together, the molding space formed between the two molds is evacuated, and the upper mold moves to compress the molding material set in the lower mold. At the same time, a pin provided in the lower mold so as to be retractable into the molding space is recessed from the molding surface of the lower mold to cause a part of the molding material to flow into the sliding hole of the pin, and then under the stroke of the upper mold. A compression molding method, characterized in that the pin is moved to a molding surface of a lower mold at a dead center to fill the molding space with the molding material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP447187A JPS63172619A (en) | 1987-01-12 | 1987-01-12 | Compression molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP447187A JPS63172619A (en) | 1987-01-12 | 1987-01-12 | Compression molding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63172619A true JPS63172619A (en) | 1988-07-16 |
Family
ID=11585037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP447187A Pending JPS63172619A (en) | 1987-01-12 | 1987-01-12 | Compression molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63172619A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02219613A (en) * | 1989-02-21 | 1990-09-03 | Sekisui Chem Co Ltd | Compression molding method |
| US5044918A (en) * | 1988-12-19 | 1991-09-03 | Krupp Maschinentechnik Gesellschaft Mit Beschrankter Haftung | Apparatus for securely positioning a fiber-reinforced plastic mass in a press |
-
1987
- 1987-01-12 JP JP447187A patent/JPS63172619A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5044918A (en) * | 1988-12-19 | 1991-09-03 | Krupp Maschinentechnik Gesellschaft Mit Beschrankter Haftung | Apparatus for securely positioning a fiber-reinforced plastic mass in a press |
| JPH02219613A (en) * | 1989-02-21 | 1990-09-03 | Sekisui Chem Co Ltd | Compression molding method |
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