JPH0350691B2 - - Google Patents
Info
- Publication number
- JPH0350691B2 JPH0350691B2 JP58177769A JP17776983A JPH0350691B2 JP H0350691 B2 JPH0350691 B2 JP H0350691B2 JP 58177769 A JP58177769 A JP 58177769A JP 17776983 A JP17776983 A JP 17776983A JP H0350691 B2 JPH0350691 B2 JP H0350691B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- cavity
- molding
- pressure
- manufacturing
- 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.)
- Expired - Lifetime
Links
- 229920005989 resin Polymers 0.000 claims description 65
- 239000011347 resin Substances 0.000 claims description 65
- 238000000465 moulding Methods 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 26
- 238000004519 manufacturing process Methods 0.000 claims description 20
- 238000002347 injection Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 238000001746 injection moulding Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000008961 swelling Effects 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 239000011162 core material Substances 0.000 description 9
- 238000001125 extrusion Methods 0.000 description 9
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
- B29C45/14409—Coating profiles or strips by injecting end or corner or intermediate parts
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は長尺材の端末部を射出成形型に挿入
し、射出成形により端末樹脂部（エンドキヤツ
プ）を形成するモールデイングの製造方法、特に
車両用として使用されるモールデイングの製造方
法に関するものである。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a molding manufacturing method in which an end portion of a long material is inserted into an injection mold and a terminal resin portion (end cap) is formed by injection molding. The present invention relates to a method of manufacturing moldings used for vehicles.
自動車の車体等には装飾兼保護用として、種々
のモーデイングが取付けられている。第１図はそ
の一例としてのサイドモールデイングの前部を切
断した斜視図、第２図はそのＡ−Ａ断面図、第３
図は従来の製造方法を示す射出成形型の断面図で
ある。モールデイング１は金属部２、装飾フイル
ム３，４および樹脂部５を有する長尺材６を所定
の長さに切断し、切断端部に端末樹脂部７を形成
しており、装飾面となる外表面１ａおよび取付面
となる平担な底面１ｂとを有している。
2. Description of the Related Art Various types of mods are attached to automobile bodies and the like for decoration and protection. Fig. 1 is a perspective view of the front section of the side molding as an example, Fig. 2 is a sectional view taken along line A-A, and Fig. 3 is a cross-sectional view of the side molding.
The figure is a sectional view of an injection mold showing a conventional manufacturing method. The molding 1 is made by cutting a long material 6 having a metal part 2, decorative films 3 and 4, and a resin part 5 into a predetermined length, and forming a terminal resin part 7 at the cut end, which becomes a decorative surface. It has an outer surface 1a and a flat bottom surface 1b that serves as a mounting surface.
従来のモールデイングの製造方法は、芯材とし
ての鉄、アルミニウム、ステンレス箔等の金属箔
からなる金属部２、および着色または光輝樹脂フ
イルムからなる装飾フイルム３，４を押出成形型
に供給し、押出成形により樹脂部５を形成した長
尺材６を所定の長さに切断し、その端末部を第３
図に示すようにキヤビテイ型８およびコア型９か
らなる射出成形型に挿入して型締めし、射出ノズ
ル１０から１１を通してキヤビテイ１２に樹脂を
射出し、長尺材６の切断端部と一体化するように
端末樹脂部７を形成する。 A conventional molding production method involves supplying a metal part 2 made of metal foil such as iron, aluminum, or stainless steel foil as a core material, and decorative films 3 and 4 made of colored or bright resin films to an extrusion mold. A long material 6 on which a resin portion 5 is formed by extrusion molding is cut into a predetermined length, and the end portion is cut into a third material.
As shown in the figure, it is inserted into an injection mold consisting of a cavity mold 8 and a core mold 9 and the mold is clamped, and resin is injected into the cavity 12 through injection nozzles 10 and 11, and integrated with the cut end of the long material 6. The terminal resin portion 7 is formed so as to.
しかしながら、以上のような従来のモールデイ
ングの製造方法においては、長尺材６の厚みに±
0.2mm程度の誤差、バラツキが生ずることは避け
られない。これは押出成形品に限らず、長尺材６
として金属のロール成形品またはプレス成形品を
使用する場合も同様である。このため、長尺材６
の厚みが薄い場合には、射出成形型の長尺材６と
の当接部１３を通して逃げ部１４にバリ１５が発
生し、手作業でこのバリ１５を除去しなければな
らないとともに、バリ１５を除去した跡が著しく
外観を損うという問題点があつた。 However, in the conventional molding manufacturing method as described above, the thickness of the long material 6 is
It is unavoidable that errors and variations of about 0.2 mm will occur. This is not limited to extruded products, but also long materials 6
The same applies when a roll-formed or press-formed metal product is used. For this reason, the long material 6
If the thickness is thin, burrs 15 will be generated in the relief part 14 through the contact part 13 with the elongated material 6 of the injection molding mold, and this burr 15 must be removed manually. There was a problem in that the removed traces significantly impaired the appearance.
この発明は以上のような問題点を解消するため
のもので、キヤビテイ内に樹脂が充填されて所定
圧力に達したときに、キヤビテイ内の樹脂を徐々
に膨出させながら射出成形を行うことにより、キ
ヤビテイ内に充填された樹脂が過圧にならないよ
うに調整し、これにより長尺材に誤差、バラツキ
がある場合でも、バリが発生しないモールデイン
グの製造方法を提供することを目的としている。
This invention is intended to solve the above-mentioned problems, and when the cavity is filled with resin and a predetermined pressure is reached, injection molding is performed while gradually expanding the resin in the cavity. The present invention aims to provide a molding manufacturing method that adjusts the resin filled in the cavity so that it does not become overpressured, thereby preventing the occurrence of burrs even when there are errors and variations in the long material.
この発明は、所定の長さおよび端末形状に切断
された長尺材の端末部を射出成形型に挿入し、射
出成形により端末樹脂部を形成する方法におい
て、キヤビテイ内に樹脂を射出し、キヤビテイ内
に樹脂が充填された後も僅かの樹脂を供給して保
圧状態を保ち、キヤビテイ内の圧力が所定圧力に
達したときに、キヤビテイ内の樹脂を徐々に膨出
させながら樹脂を供給してキヤビテイ内を所定圧
力以下に維持し、前記長尺材と射出成形型の当接
部に接触している樹脂が硬化した時点で前記膨出
を停止し、その後さらに樹脂を供給して保圧状態
を保ち、射出成形を行うことを特徴とするモール
デイングの製造方法である。
This invention is a method of inserting an end portion of a long material cut into a predetermined length and end shape into an injection mold and forming an end resin portion by injection molding, in which resin is injected into a cavity and Even after the cavity is filled with resin, a small amount of resin is supplied to maintain the pressure, and when the pressure inside the cavity reaches a predetermined pressure, the resin is supplied while gradually expanding the resin inside the cavity. The inside of the cavity is maintained at a predetermined pressure or less, and the expansion is stopped when the resin in contact with the contact portion of the long material and the injection mold is cured, and then more resin is supplied to maintain the pressure. This is a molding manufacturing method characterized by maintaining the molding state and performing injection molding.
以下、この発明の実施例を図面に基づいて説明
する。第４図および第５図はこの発明の一実施例
による製造方法を示す射出成形型の異なる時点に
おける断面図、第６図は他の実施例の製造方法を
示す射出成形型の断面図、第７図は射出成形時の
圧力および射出量を示すグラフであり、第１図な
いし第３図と同一符号は同一または相当部分を示
す。第４図および第５図において、射出成形型に
は、ピン１６がコア型９からキヤビテイ１２内に
前進、後退自在に突出し、その基部に接続するピ
ストン１７がコア型９に設けられたシリンダ１８
内を往復動できるようにスプリング１９によつて
支持されている。ピン１６が突出する部分のコア
型９の上面には、ピン１６の全周に密着するシー
ル材２０が設けられている。第６図では圧力のか
からない状態でピン１６はコア型９の上面と一致
しており、この状態からピン１６は後退するよう
にされている。２１はスプリング１９を支持する
支持板である。
Embodiments of the present invention will be described below based on the drawings. 4 and 5 are cross-sectional views of an injection mold at different times showing a manufacturing method according to one embodiment of the present invention, and FIG. 6 is a cross-sectional view of an injection mold showing a manufacturing method of another embodiment. FIG. 7 is a graph showing the pressure and injection amount during injection molding, and the same reference numerals as in FIGS. 1 to 3 indicate the same or corresponding parts. 4 and 5, the injection mold includes a cylinder 18 provided in the core mold 9 with a pin 16 projecting forward and backward from the core mold 9 into the cavity 12, and a piston 17 connected to the base of the pin 16.
It is supported by a spring 19 so that it can reciprocate inside. A sealing material 20 that is in close contact with the entire circumference of the pin 16 is provided on the upper surface of the core mold 9 at the portion where the pin 16 protrudes. In FIG. 6, the pin 16 is aligned with the upper surface of the core mold 9 in a state where no pressure is applied, and the pin 16 is made to retreat from this state. 21 is a support plate that supports the spring 19.
モールデイング１の製造方法は、まず従来法と
同様に、金属部２および装飾フイルム３，４を押
出成形型に供給して、押出成形により樹脂部５を
形成した長尺材６を所定の長さに切断し、その端
末部をキヤビテイ型８およびコア型９からなる射
出成形型に挿入して型締めする。このとき第４図
の場合は長尺材６の端末をピン１６に当接させて
位置決めする。そして射出ノズル１０からゲート
１１を通してキヤビテイ１２に樹脂を射出する。 The manufacturing method of the molding 1 is as follows: First, as in the conventional method, the metal part 2 and the decorative films 3 and 4 are fed into an extrusion mold, and the elongated material 6 on which the resin part 5 is formed by extrusion molding is extruded into a predetermined length. The end portion is inserted into an injection mold consisting of a cavity mold 8 and a core mold 9, and the mold is clamped. At this time, in the case of FIG. 4, the end of the elongated material 6 is brought into contact with the pin 16 for positioning. Then, resin is injected from the injection nozzle 10 into the cavity 12 through the gate 11.
キヤビテイ１２内に樹脂の充填を完了した時点
においても、なお僅かの樹脂を供給して保圧状態
に保ち、成形される端末樹脂部７の収縮を防止す
る。すなわち、射出成形時の樹脂の圧力および射
出量を、第７図に示すように、T0からT5に至る
各時点ごとに段階的に変化するように設定し、
T4の時点で充填が完了した後も、さらにT5の時
点に至る一定時間保圧状態を保つ。 Even when the filling of the resin into the cavity 12 is completed, a small amount of resin is still supplied to maintain the pressure-retaining state and prevent the terminal resin portion 7 to be molded from shrinking. That is, the resin pressure and injection amount during injection molding are set to change stepwise at each point from T 0 to T 5 , as shown in FIG.
Even after filling is completed at time T 4 , the pressure is maintained for a certain period of time until time T 5 .
キヤビテイ１２内に樹脂が充満しない間はキヤ
ビテイ１２内の圧力は上らないので、当接部１３
からの樹脂の流出はないが、キヤビテイ１２内に
樹脂が充満した後、保圧状態に保つと、キヤビテ
イ１２内の樹脂が硬化前に加圧され、当接部１３
から流出するようになるが、本発明では、スプリ
ング１９の押圧力を調整することにより、キヤビ
テイ１２内に樹脂が充填されて、所定圧力以上に
なると、ピン１６の先端部にコア型９に向けて作
用する圧力により、ピン１６はスプリング１９の
押圧力に抗して徐々に後退し、この部分の樹脂が
膨出するため、所定圧以下に維持される。 While the cavity 12 is not filled with resin, the pressure inside the cavity 12 does not increase, so the contact portion 13
Although the resin does not flow out from the contact portion 13, if the cavity 12 is filled with resin and kept under pressure, the resin in the cavity 12 will be pressurized before hardening, and the contact portion 13 will be pressurized.
However, in the present invention, by adjusting the pressing force of the spring 19, the cavity 12 is filled with resin, and when the pressure exceeds a predetermined pressure, the resin flows out from the tip of the pin 16 toward the core mold 9. Due to the pressure acting on the pin 16, the pin 16 gradually retreats against the pressing force of the spring 19, and the resin in this area swells, so that the pressure is maintained below a predetermined pressure.
この間にキヤビテイ型８の当接部１３に接触し
ている樹脂は他の部分の樹脂よりも早く硬化する
ため、ピン１６が第４図の位置から第５図の位置
に後退して、保圧圧力がスプリング１９の押圧力
とバランスし、キヤビテイ１２内の圧力が高くな
つても、当接部１３から流出して逃げ部１４内に
バリ１５を形成することがない。 During this time, the resin in contact with the abutment part 13 of the cavity mold 8 hardens faster than the resin in other parts, so the pin 16 retreats from the position shown in Figure 4 to the position shown in Figure 5, and the holding pressure is increased. The pressure is balanced with the pressing force of the spring 19, and even if the pressure inside the cavity 12 becomes high, it will not flow out from the abutment part 13 and form a burr 15 in the relief part 14.
第６図の場合は、図示の状態からピン１６が後
退し、この部分の樹脂がキヤビテイ外へ膨出する
ことになる。 In the case of FIG. 6, the pin 16 is retracted from the illustrated state, and the resin in this portion bulges out of the cavity.
こうして射出された樹脂は長尺材６の端末部に
一体的に接合して端末樹脂部７を形成し、成形品
は型開きにより、モールデイング１として取り出
される。製造されたモールデイング１には、端末
樹脂部７の裏面に、第４図および第５図の場合は
ピン１６の突出部分に対応する凹部が形成され、
第６図の場合はピン１６の後退に対応した突起が
形成され、位置決め手段等として利用される。 The resin thus injected is integrally bonded to the end portion of the elongated material 6 to form the end resin portion 7, and the molded product is taken out as the molding 1 by opening the mold. In the manufactured molding 1, a concave portion corresponding to the protruding portion of the pin 16 in the case of FIGS. 4 and 5 is formed on the back surface of the terminal resin portion 7,
In the case of FIG. 6, a protrusion corresponding to the retreat of the pin 16 is formed and is used as a positioning means or the like.
以上の実施例によつて得られるモールデイング
１は長尺材６と端末樹脂部７に段差のないもので
あるが、キヤビテイ１２を第３図のように形成し
て、段差のあるモールデイング１を製造するよう
にしてもよい。またピン１６は他の形状の突起で
あつてもよく、その前進、後退機構も変更可能で
ある。 Although the molding 1 obtained in the above embodiment has no step between the elongated material 6 and the terminal resin portion 7, the molding 1 with a step is formed by forming the cavity 12 as shown in FIG. may be manufactured. Further, the pin 16 may be a protrusion of another shape, and its advancing and retracting mechanism can also be changed.
第８図は他の実施例により製造されたサイドモ
ールデイングの前部を切断した斜視図である。こ
の実施例のモールデイングの製造方法では、ステ
ンレス板等の金属板をロール成形またはプレス成
形により異形断面とした金属部２を押出成形型に
供給し、樹脂部５（底面の取付樹脂部５ａを含
む）を押出成形して長尺材６を成形し、これを所
定寸法に切断した後、前記と同様に射出成形によ
り端末樹脂部７を形成する。 FIG. 8 is a perspective view with the front section of the side molding manufactured according to another embodiment cut away. In the molding manufacturing method of this embodiment, a metal part 2 made of a metal plate such as a stainless steel plate with an irregular cross section by roll forming or press forming is supplied to an extrusion mold, and a resin part 5 (a mounting resin part 5a on the bottom) is supplied to an extrusion mold. ) is extruded to form a long material 6, which is cut into a predetermined size, and then the terminal resin portion 7 is formed by injection molding in the same manner as described above.
第９図はさらに他の実施例により製造されたウ
エザーストリツプモールデイングの前部を切断し
た斜視図である。この実施例のモールデイングの
製造方法では、ステンレス等の金属板をロール成
形またはプレス成形により異形断面とした金属部
２を押出成形型に供給し、樹脂部５（リツプ５ｂ
を含む）を押出成形により形成した長尺材６を所
定寸法に切断するとともに、切欠部２２を有する
端末形状に切断加工を行い、この切断端部に沿つ
て前記と同様に、射出成形により端末樹脂部７を
形成する。 FIG. 9 is a perspective view of the front section of a weather strip molding manufactured according to yet another embodiment. In the molding production method of this embodiment, a metal part 2 made of a metal plate such as stainless steel with an irregular cross section by roll forming or press forming is supplied to an extrusion mold, and a resin part 5 (lip 5b) is supplied to an extrusion mold.
A long material 6 formed by extrusion molding (including A resin portion 7 is formed.
以上の説明において、長尺材６の形状、構造は
目的とするモールデイングの種類によつて変更可
能である。その材質も金属部２だけのもの、ある
いは樹脂部５だけのものであつてもよいが、両者
の結合したものが一般的であり、装飾フイルム
３，４がない場合でもよい。金属部２としてはス
テンレス板、アルミニウム板などの任意のものが
使用され、ロール成形またはプレス成形したも
の、あるいはしないものなどが使用される。樹脂
部５は軟質塩化ビニル樹脂などの弾性に富む合成
樹脂により押出成形されるのが一般的である。射
出成形型の構成も製造するモールデイングに合わ
せて任意に変更でき、樹脂の膨出機構も他の類似
の構造のものを使用してもよい。さらに本発明は
サイドモールデイング、ウエザーストリツプモー
ルデイングに限らず、他のモールデイングの製造
にも適用可能である。 In the above description, the shape and structure of the elongated material 6 can be changed depending on the type of intended molding. The material may be made of only the metal part 2 or only the resin part 5, but it is generally a combination of the two, and the decorative films 3 and 4 may not be provided. The metal part 2 may be made of any material such as a stainless steel plate or an aluminum plate, and may be roll-formed or press-formed, or may not be formed. The resin portion 5 is generally extruded from a synthetic resin with high elasticity such as soft vinyl chloride resin. The configuration of the injection mold can also be changed arbitrarily according to the molding to be manufactured, and other similar structures for the resin expansion mechanism may also be used. Furthermore, the present invention is applicable not only to side moldings and weather strip moldings, but also to the production of other moldings.
本発明によれば、キヤビテイ内に樹脂が充填さ
れて所定圧力に達したときに、キヤビテイ内の樹
脂を徐々に膨出させながら射出成形を行うように
したので、キヤビテイ内に充填された樹脂が過圧
にならないように調整し、これにより長尺材に誤
差、バラツキがある場合でも、バリが発生しな
い。また長尺材との当接部を強く締めつける必要
がないので、モールデイングの外表面に傷が発生
せず、優れた外観のモールデイングを製造するこ
とができる。さらにキヤビテイに樹脂が充填され
た後も樹脂を供給して保圧状態を保つので、成形
される端末樹脂部の収縮による変形を防止するこ
とができ、この場合でもバリの発生を防止するこ
とができる。
According to the present invention, when the cavity is filled with resin and a predetermined pressure is reached, injection molding is performed while gradually expanding the resin in the cavity, so that the resin filled in the cavity is Adjustment is made to avoid overpressure, so even if there are errors or variations in the long material, burrs will not occur. Further, since there is no need to strongly tighten the contact portion with the elongated material, no scratches occur on the outer surface of the molding, and a molding with an excellent appearance can be manufactured. Furthermore, even after the cavity is filled with resin, the resin is supplied to maintain the pressure-retained state, which prevents deformation due to shrinkage of the terminal resin part to be molded, and even in this case, it is possible to prevent the occurrence of burrs. can.
第１図はサイドモールデイングの前部を切断し
た斜視図、第２図はそのＡ−Ａ断面図、第３図は
従来の製造方法を示す射出成形型の断面図、第４
図および第５図はこの発明の一実施例の製造方法
を示す射出成形型の異なる時点の断面図、第６図
は他の実施例を示す射出成形型の断面図、第７図
は射出成形時の圧力および射出量を示すグラフ、
第８図および第９図はそれぞれ他の実施例により
製造されたモールデイングの前部を切断した斜視
図である。
各図中、同一符号は同一または相当部分を示
し、１はモールデイング、２は金属部、５は樹脂
部、６は長尺材、７は端末樹脂部、８はキヤビテ
イ型、９はコア型、１２はキヤビテイ、１３は当
接部、１５はバリ、１６はピン、１７はピスト
ン、１８はシリンダ、１９はスプリングである。
Fig. 1 is a perspective view of the front part of the side molding, Fig. 2 is a sectional view taken along line AA, Fig. 3 is a sectional view of an injection molding die showing a conventional manufacturing method, and Fig. 4 is a sectional view of the injection molding die showing the conventional manufacturing method.
5 and 5 are cross-sectional views of an injection mold at different times showing a manufacturing method according to an embodiment of the present invention, FIG. 6 is a cross-sectional view of an injection mold showing another embodiment, and FIG. 7 is an injection molding method. Graph showing the pressure and injection amount at
FIGS. 8 and 9 are perspective views of the front section of moldings manufactured according to other embodiments, respectively. In each figure, the same reference numerals indicate the same or equivalent parts, 1 is the molding, 2 is the metal part, 5 is the resin part, 6 is the elongated material, 7 is the terminal resin part, 8 is the cavity mold, and 9 is the core mold. , 12 is a cavity, 13 is a contact portion, 15 is a burr, 16 is a pin, 17 is a piston, 18 is a cylinder, and 19 is a spring.
Claims (1)
材の端末部を射出成形型に挿入し、射出成形によ
り端末樹脂部を形成する方法において、キヤビテ
イ内に樹脂を射出し、キヤビテイ内に樹脂が充填
された後も僅かの樹脂を供給して保圧状態を保
ち、キヤビテイ内の圧力が所定圧力に達したとき
に、キヤビテイ内の樹脂を徐々に膨出させながら
樹脂を供給してキヤビテイ内を所定圧力以下に維
持し、前記長尺材と射出成形型の当接部に接触し
ている樹脂が硬化した時点で前記膨出を停止し、
その後さらに樹脂を供給して保圧状態を保ち、射
出成形を行うことを特徴とするモールデイングの
製造方法。 ２ 樹脂の膨出がキヤビテイ内に突出する突起を
徐々に後退させることによるものである特許請求
の範囲第１項記載のモールデイングの製造方法。 ３ 樹脂の膨出がスプリングの圧縮に抗して行わ
れるものである特許請求の範囲第１項または第２
項記載のモールデイングの製造方法。 ４ 突起がピンである特許請求の範囲第２項記載
のモールデイングの製造方法。[Claims] 1. In a method of inserting an end portion of a long material cut into a predetermined length and end shape into an injection mold and forming a terminal resin portion by injection molding, resin is injected into a cavity. Even after the resin is filled into the cavity, a small amount of resin is supplied to maintain the pressure, and when the pressure inside the cavity reaches a predetermined pressure, the resin inside the cavity is gradually expanded and filled with resin. is supplied to maintain the inside of the cavity at a predetermined pressure or less, and the expansion is stopped when the resin in contact with the contact portion of the elongated material and the injection mold is cured,
A molding manufacturing method characterized by further supplying resin to maintain a pressure-retaining state and performing injection molding. 2. The method of manufacturing a molding according to claim 1, wherein the swelling of the resin is caused by gradually retreating a protrusion protruding into the cavity. 3. Claim 1 or 2, in which the expansion of the resin is performed against the compression of the spring.
The method for manufacturing the molding described in Section 1. 4. The method of manufacturing a molding according to claim 2, wherein the protrusion is a pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17776983A JPS6068919A (en) | 1983-09-26 | 1983-09-26 | Preparation of molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17776983A JPS6068919A (en) | 1983-09-26 | 1983-09-26 | Preparation of molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6068919A JPS6068919A (en) | 1985-04-19 |
| JPH0350691B2 true JPH0350691B2 (en) | 1991-08-02 |
Family
ID=16036799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17776983A Granted JPS6068919A (en) | 1983-09-26 | 1983-09-26 | Preparation of molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6068919A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01286807A (en) * | 1988-05-14 | 1989-11-17 | Etsuhisa Abe | Molding mold |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5913061Y2 (en) * | 1979-03-30 | 1984-04-19 | 豊田合成株式会社 | Mold for joining elastic members |
-
1983
- 1983-09-26 JP JP17776983A patent/JPS6068919A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6068919A (en) | 1985-04-19 |
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