JPH0626526Y2 - Band core - Google Patents
Band coreInfo
- Publication number
- JPH0626526Y2 JPH0626526Y2 JP1987169097U JP16909787U JPH0626526Y2 JP H0626526 Y2 JPH0626526 Y2 JP H0626526Y2 JP 1987169097 U JP1987169097 U JP 1987169097U JP 16909787 U JP16909787 U JP 16909787U JP H0626526 Y2 JPH0626526 Y2 JP H0626526Y2
- Authority
- JP
- Japan
- Prior art keywords
- core
- resin
- outer cylinder
- resin injection
- annular plate
- 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
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- Storage Of Web-Like Or Filamentary Materials (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、映画用のネガあるいはポジフィルム、ネガあ
るいはポジのマイクロフィルム、長巻35mmフィルム（Ｊ
135）、写真植字用フィルム、コンピュウター用フィル
ム、電算写植ペーパー等の写真感光材料帯状体（ロール
フィルムやロールペーパー）用のコア（巻芯）に関す
る。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a negative or positive film for movies, a negative or positive microfilm, a long roll 35 mm film (J
135), a film for phototypesetting, a film for computer, a core for a strip of photographic light-sensitive material (roll film or roll paper) such as computer typesetting paper.
映画用のネガあるいはポジフィルム等は、帯状体用コア
に巻き付けた状態で販売され、また使用されている。こ
の帯状体用コアは、熱可塑性樹脂、ほとんどが耐衝撃性
ポリスチレン樹脂でできており、例えば、第６図及び第
７図に示すものがあり、第６図は樹脂注入部と反対側か
ら見た正面図、第７図は第６図中Ｂ−Ｂ線断面図であ
る。Negative or positive films for movies are sold and used by being wound around a core for a band. This strip core is made of a thermoplastic resin, mostly impact-resistant polystyrene resin, such as those shown in FIGS. 6 and 7, and FIG. 6 is seen from the side opposite to the resin injection part. FIG. 7 is a sectional view taken along line BB in FIG.
これらの図に示す帯状体用コアは、同じ幅の外円筒11と
内円筒12の各々中央部間がこの軸芯と直角方向に配され
た一枚の円環板13で連接されている。そして、この円環
板13の両面には、両円筒11、12と円環板13で形成される
円溝の断面と略同形のリブ14が片面に八枚づつ、左右対
称にかつ前記軸芯から放射方向に両円筒11、12を連接し
て配設されている。In the core for a band shown in these figures, the center portions of the outer cylinder 11 and the inner cylinder 12 having the same width are connected by a single annular plate 13 arranged in a direction perpendicular to the axis. Then, on both sides of the annular plate 13, eight ribs 14 having substantially the same shape as the cross section of the circular groove formed by the both cylinders 11 and 12 and the annular plate 13 are formed on one side, symmetrically and with the axial center. The two cylinders 11 and 12 are arranged so as to be connected to each other in the radial direction.
このリブ14の内一方のリブ14（図中、上側のリブ）の端
面略中央は、コアを射出成形法で形成する際の熱可塑性
樹脂を注入する樹脂注入口に対応する樹脂注入部Ｇとな
っている。One of the ribs 14 (upper rib in the drawing) of the ribs 14 has a substantially central end surface as a resin injection portion G corresponding to a resin injection port for injecting a thermoplastic resin when the core is formed by injection molding. Has become.
また、内円筒12の筒長方向には、撮影機あるいは映写機
の軸の爪片等を係止する溝18が設けられ、外円筒11の筒
長方向には、フィルムの端部を挿入するスリット状溝19
が設けられている。Further, a groove 18 for locking a claw piece or the like of a shaft of a camera or a projector is provided in the cylinder length direction of the inner cylinder 12, and a slit for inserting an end portion of a film in the cylinder length direction of the outer cylinder 11. Groove 19
Is provided.
最近、本出願人は圧縮強度を向上するために、樹脂注入
部Ｇを外円筒11と内円筒12及び２つのリブ14に囲まれた
略扇形の円環板の少なくとも片表面の略中央に設けるこ
とを提案した（実開昭61-128256号公報）。また、リブ
の上端を切欠いて軽量化しても、圧縮強度を向上させる
ことができる帯状体用コアを提案した（実開昭61-86367
号公報）。Recently, in order to improve the compressive strength, the present applicant has provided a resin injection portion G at substantially the center of at least one surface of a substantially fan-shaped annular plate surrounded by the outer cylinder 11, the inner cylinder 12 and the two ribs 14. I proposed that (Japanese Utility Model Publication No. 61-128256). In addition, we proposed a strip core that can improve the compressive strength even if the ribs are notched at the top to make them lighter (Shokaisho 61-86367).
Issue).
また、帯状体用コアの他の例としては、フランジを一体
化したものや（実開昭49-18536号公報等）、フランジの
一方を着脱可能とし、長尺フィルムを巻回状態のまま収
納できるものがあった（実公昭59-24025号公報）。Other examples of the core for the band-shaped body include one in which a flange is integrated (Jpn. Pat. Appln. KOKAI No. Sho 49-18536), one of the flanges is removable, and a long film can be stored in a wound state. There was something that could be done (Jitsuko Sho 59-24025).
以上のような従来の帯状体用コアでは、外円筒の外表面
はもちろん、外円筒の内表面及び内円筒の外表面並びに
内表面等全ての面がフラットに形成されており、可動金
型用コアよりキャビティーとの接触面積が広い場合は、
帯状体用コアを取り出す時に、キャビティーとの摩擦抵
抗の方が大きくなり、帯状体用コアがキャビティー側に
残り取り出し機で取り出すことがしばしば出来なかっ
た。In the conventional core for a band-shaped body as described above, not only the outer surface of the outer cylinder but also the inner surface of the outer cylinder, the outer surface of the inner cylinder, and the inner surface are all formed flat. If the contact area with the cavity is larger than the core,
When taking out the band-shaped core, the frictional resistance with the cavity became larger, and the band-shaped core remained on the cavity side and could not be often taken out by the take-out machine.
さらに、樹脂注入部と反対側は熱可塑性樹脂が遅れて流
れるため、流動性の悪い樹脂ではウェルドラインが強く
発生し、外観が悪化するとともに圧縮強度や落下強度が
低下していた。Further, since the thermoplastic resin flows behind on the side opposite to the resin injection portion, a weld line is strongly generated in the resin having poor fluidity, the appearance is deteriorated, and the compression strength and the drop strength are reduced.
本考案は以上の問題点を解決し、帯状体用コアをキャビ
ティーから確実に取り出すことができ、かつ外観及び物
理強度が向上した帯状体用コアを提供することを目的と
する。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a core for a band-shaped body, which can surely take out the core for the band-shaped body from the cavity, and which has an improved appearance and physical strength.
本考案は、上記目的を達成するために、樹脂注入部と反
対側に位置する外円筒の可動金型用コア側の内表面に環
状凸部を形成し、帯状体用コアと可動金型用コアとの間
の摩擦抵抗を金型キャビティーとの間の摩擦抵抗より大
きくするとともに、樹脂注入部と反対側における樹脂の
流動性を良好にしたものである。In order to achieve the above-mentioned object, the present invention forms an annular convex portion on the inner surface of the outer cylinder located on the side opposite to the resin injecting portion on the side of the movable mold core to form a ring-shaped core and a movable mold. The frictional resistance with the core is made larger than the frictional resistance with the mold cavity, and the fluidity of the resin on the side opposite to the resin injection portion is improved.
すなわち、本考案の帯状体用コアは、外円筒と、該外円
筒の軸芯と軸芯が一致する内円筒と、両円筒の軸芯と直
角方向に形成され、かつ両円筒の各々の略中央部間を連
接する一枚の円環板と、該円環板の両面に略左右対称
で、かつ前記軸芯から放射方向に形成されて両円筒を連
接するリブと、円環板を中心にして樹脂注入部と反対側
に位置する外円筒の可動金型用コア側の内表面に前記軸
芯と直角方向に形成された２以上の環状凸部とを有する
ことを特徴として構成されている。That is, the strip core of the present invention is formed in an outer cylinder, an inner cylinder whose axis coincides with the axis of the outer cylinder, a direction perpendicular to the axes of both cylinders, and each One annular plate connecting the central portions, and a rib that is substantially bilaterally symmetrical on both sides of the annular plate and that is formed in the radial direction from the axis and connects both cylinders, and the annular plate is the center. In addition, the inner surface of the outer cylinder located on the side opposite to the resin injection portion on the side of the movable mold core has two or more annular projections formed in a direction perpendicular to the axis. There is.
凸部は、樹脂注入部と反対側に位置する外円筒の内表面
に環状に形成されるとともに、その外円筒の可動金型用
コア側（すなわち、可動金型用コアと接触する面）に形
成されている。この構成により、樹脂の流動性が良好に
なるとともに、摩擦力が大きくなっている。The convex portion is formed in an annular shape on the inner surface of the outer cylinder located on the side opposite to the resin injection portion, and on the movable mold core side of the outer cylinder (that is, the surface that contacts the movable mold core). Has been formed. With this configuration, the fluidity of the resin is improved and the frictional force is increased.
内円筒はこの帯状体を使用する装置の軸端に挿入される
部分である。この外円筒と内円筒の軸芯を一致させて、
両円筒の各々略中央部間を前記軸芯と直角方向に位置す
る一枚の円環板で連接する。その結果、この連接部の断
面はＨ形になる。この円環板には、例えば、リブとリブ
の間の部分に適宜窓孔などを設けることもできる。The inner cylinder is the part that is inserted into the axial end of the device using this strip. Align the axes of the outer and inner cylinders,
The substantially central portions of both cylinders are connected to each other by a single annular plate positioned in the direction perpendicular to the axis. As a result, the cross section of this connecting portion becomes H-shaped. In this annular plate, for example, a window hole or the like can be appropriately provided in a portion between the ribs.
円環板の両面に複数のリブを略左右対称にかつ前記軸芯
から放射方向に両円筒を連接して配設する。この複数の
リブの内の隣合う２つのリブと前記外円筒及び内円筒で
囲まれて、円環板は複数の扇形をした各部分に分割され
る。そして、この分割された扇形をした円環板の略中央
又はリブの端両略中央に樹脂注入部Ｇを配設するのがゲ
ート残加工処理が不用になるので好ましい。この場合も
樹脂注入部Ｇは樹脂流動バランスの点から偶数ケにする
のが一般的である。A plurality of ribs are arranged substantially symmetrically on both sides of the annular plate, and both cylinders are arranged in a radial direction from the axial center. The annular plate is divided into a plurality of fan-shaped portions surrounded by two adjacent ribs of the plurality of ribs and the outer cylinder and the inner cylinder. It is preferable to dispose the resin injecting portion G at the approximate center of the divided fan-shaped annular plate or at the approximate center of both ends of the ribs, since the gate residual processing becomes unnecessary. Also in this case, it is general that the resin injection part G has an even number from the viewpoint of the resin flow balance.
リブの枚数はコアのサイズ、要求される強度などに応じ
て適当になるように定めればよいが、通常２〜32枚であ
る。リブの形状、厚さ等はすべて同一でなくてもよい
が、中央の円環板に対し左右対称とするのが樹脂流動バ
ランスの点から好ましい。このようなコアであれば、映
写機の軸の爪片等を係止する溝やフィルムの端部を挿入
するスリット状溝の有無や形状、寸法、厚さ、リブ形状
等は帯状体の種類や巻長、サイズや要求される特性に応
じ公知のいかなるものであってもよいことは言うまでも
ない。The number of ribs may be appropriately determined according to the size of the core, the required strength, etc., but is usually 2 to 32. The ribs do not have to have the same shape, thickness, etc., but it is preferable that the ribs are symmetrical with respect to the central annular plate from the viewpoint of resin flow balance. With such a core, the presence or absence, shape, dimensions, thickness, rib shape, etc. of the groove for locking the claw piece of the projector shaft or the slit groove for inserting the end of the film, etc. It goes without saying that any known material may be used depending on the winding length, size and required characteristics.
また、各部の肉厚は均一でもよく、部分的に厚くした
り、薄くしたりすることもできる。Further, the wall thickness of each part may be uniform, or may be partially thickened or thinned.
そのほか、この帯状体用コアにはその用途に応じて適当
な加工が施される。この加工は、例えば、映画用フィル
ムのコアの場合には爪を係止する溝又は凹みとか、フィ
ルムの端部を挿入するスリットやフィルムを保持するフ
ランジ等形成する加工である。In addition, the band core is appropriately processed according to its use. For example, in the case of a film film core, this process is a process for forming a groove or a recess for locking a nail, a slit for inserting an end of the film, a flange for holding the film, or the like.
また、２つのリブに囲まれた略扇形の円環板には社名や
商品名や金型No.等各種の表示を刻設することもでき
る。Further, it is possible to engrave various indications such as a company name, a product name, and a die number on the substantially fan-shaped annular plate surrounded by the two ribs.
コアの材料は、熱可塑性樹脂であれば特に限定されない
が、ポリプロピレン樹脂、ポリスチレン樹脂、ＡＢＳ樹
脂等が好ましく、特に安価で寸法精度が良好で、ヒケ発
生が少なく、物理強度も比較的大きな耐衝撃性ポリスチ
レン樹脂を少くとも50重量％含む樹脂が好ましい。この
熱可塑性樹脂中には要求特性にあった各種公知の添加剤
を含ませることができるのはいうまでもない。添加剤は
例えば、滑剤、帯電防止剤、遮光性物質、白色顔料、着
色顔料、着色染料、酸化防止剤、金属粉末、高級脂肪
酸、脂肪酸金属塩、カップリング剤等である。The material of the core is not particularly limited as long as it is a thermoplastic resin, but polypropylene resin, polystyrene resin, ABS resin and the like are preferable, and it is particularly inexpensive, has good dimensional accuracy, has few sink marks, and has relatively high physical strength. Resins containing at least 50% by weight of polystyrene resin are preferred. It goes without saying that various known additives suitable for the required characteristics can be contained in the thermoplastic resin. The additives are, for example, lubricants, antistatic agents, light-shielding substances, white pigments, coloring pigments, coloring dyes, antioxidants, metal powders, higher fatty acids, fatty acid metal salts, coupling agents and the like.
射出成形には金型内真空射出成形も含まれる。また、こ
の帯状体用コアには、例えば、フランジ、各種の部品を
取り付けたり印刷やラベル貼などを行うことができる。Injection molding also includes in-mold vacuum injection molding. Further, for example, a flange or various parts can be attached to the core for band-shaped bodies, and printing or labeling can be performed.
本考案の帯状体用コアの用途は、帯状体であれば特に限
定されるものではなく、ビデオテープ、オーディオテー
プ、映画用フィルム、写真植字フィルム、コンピュータ
ー用フィルム、電算写植ペーパー等に用いることができ
る。特に、映画用ポジフィルムやマイクロポジフィルム
等の巻芯用として好適である。The use of the strip core of the present invention is not particularly limited as long as it is a strip, and it can be used for video tape, audio tape, movie film, phototypesetting film, computer film, computer typesetting paper, etc. it can. In particular, it is suitable for cores of movie positive films and micro positive films.
本考案の帯状体用コアでは、外円筒の内表面に形成され
た環状凸部が環状凸部を形成する可動金型用コアの凹部
と嵌合して摩擦抵抗が大きくなり、帯状体用コアは可動
金型用コアの引抜きに追従して取り出される。また、環
状凸部によって樹脂の流動空間が広くなり、樹脂注入の
際、樹脂の流動性を向上させている。In the core for strips of the present invention, the annular convex portion formed on the inner surface of the outer cylinder fits into the concave portion of the core for the movable mold forming the annular convex portion to increase the frictional resistance. Is taken out following the drawing of the movable mold core. Further, the annular convex portion widens the resin flow space, and improves the fluidity of the resin when the resin is injected.
実施例 本考案の帯状体用コアの一実施例を第１図から第３図に
基づいて説明する。Embodiment An embodiment of the core for a strip according to the present invention will be described with reference to FIGS. 1 to 3.
第１図は樹脂注入部と反対側から見た帯状体用コアの斜
視図、第２図は樹脂注入部と反対側から見た帯状体用コ
アの正面図、第３図は第２図中Ａ−Ａ線断面図である。FIG. 1 is a perspective view of the strip core viewed from the side opposite to the resin injection part, FIG. 2 is a front view of the strip core viewed from the side opposite to the resin injection part, and FIG. 3 is in FIG. It is the sectional view on the AA line.
これらの図において、帯状体用コアは、略同じ幅の外円
筒１と内円筒２とが軸芯を一致させて設けられ、両円筒
１、２の各々の中央部間が前記軸芯と直角方向に設けら
れた一枚の円環板３で連接されている。この円環板３の
両面には、片面８枚づつ合計16枚のリブ４…４が円環板
３を挟んだ左右対称に形成されている。In these figures, the core for a band-shaped body is provided with an outer cylinder 1 and an inner cylinder 2 having substantially the same width with their axes aligned, and a space between the central portions of both cylinders 1 and 2 is perpendicular to the axis. They are connected by a single annular plate 3 provided in the direction. On both sides of the annular plate 3, a total of 16 ribs 4 ... 4 with eight on each side are formed symmetrically across the annular plate 3.
各リブ４は、いずれも軸方向端部に逆台形状の切欠部７
が穿設され、かつ、前記軸芯から放射方向に配設され、
外円筒１の内表面と内円筒２の外表面とを接続してい
る。すなわち、円環板３はリブ４によって８個の略扇形
をした部分に分割されており、この略扇形をした部分の
一方の側（図中下側）の略中央が、樹脂を注入する際に
金型の樹脂注入口に対応する樹脂注入部Ｇとなってい
る。この樹脂注入部Ｇには、樹脂の注入が完了した際に
樹脂注入口に発生する樹脂注入口残６が突出して残留し
てもあと加工を不要にしている。Each of the ribs 4 has an inverted trapezoidal notch 7 at the end in the axial direction.
Is provided, and is arranged in a radial direction from the axis,
The inner surface of the outer cylinder 1 and the outer surface of the inner cylinder 2 are connected. That is, the annular plate 3 is divided into eight substantially fan-shaped portions by the ribs 4, and the substantially center of one side (the lower side in the drawing) of this substantially fan-shaped portion is used when the resin is injected. The resin injection part G corresponds to the resin injection port of the mold. The resin injection part G does not require post-processing even if the resin injection port residue 6 generated at the resin injection port when the resin injection is completed is projected and remains.
そして、樹脂注入部Ｇと反対側（図中上側）の外円筒１
の内表面は、可動金型用コアに接触するものであり、こ
の内表面に、円環板３に平行な３条の環状凸部５…５が
形成されている。Then, the outer cylinder 1 on the side opposite to the resin injection part G (upper side in the figure)
The inner surface of is in contact with the movable mold core, and three annular projections 5 ... 5 parallel to the annular plate 3 are formed on this inner surface.
内円筒２には撮影機あるいは映写機の軸爪等を係止する
溝８が設けられており、一方、外円筒１にはフィルムの
端部を挿入するスリット状の溝９が設けられている。The inner cylinder 2 is provided with a groove 8 for locking a shaft nail or the like of a camera or a projector, while the outer cylinder 1 is provided with a slit-shaped groove 9 for inserting an end portion of a film.
第４図及び第５図は他の実施例を示すもので、第４図は
帯状体用コアの樹脂注入部と反対側から見た斜視図、第
５図は帯状体用コアの樹脂注入部側から見た斜視図であ
る。4 and 5 show another embodiment. FIG. 4 is a perspective view seen from the side opposite to the resin injection portion of the strip-shaped core, and FIG. 5 is a resin injection portion of the strip-shaped core. It is the perspective view seen from the side.
この実施例の帯状体用コアは、リブ４に切欠部７が形成
されておらず、また、一方のリブ７に円弧状の凹部９が
形成され、この凹部９に樹脂注入部Ｇが設けられ樹脂注
入口残６が突出して残留してもあと加工を不要にしてい
る。環状凸部５は、第１図〜第３図に示した実施例と同
様に構成されている。In the core for a band-shaped body of this embodiment, the rib 4 is not formed with the notch 7, and the rib 7 is formed with the arc-shaped recess 9 and the recess 9 is provided with the resin injection part G. Even if the resin injection port residue 6 protrudes and remains, post processing is not required. The annular convex portion 5 has the same structure as that of the embodiment shown in FIGS.
次に、本考案品Ｉ〜III、比較品及び従来品の特性を比
較した実験結果について説明する。Next, the experimental results comparing the characteristics of the invention products I to III, the comparative product and the conventional product will be described.
本考案品Ｉ 本考案品Ｉは、外径が３インチの35mm幅の映画フィルム
2000フィート巻用のものであり、第１図〜第３図に示す
構成である。そして、外円筒１の肉厚が2.1mm、内円筒
２の肉厚が2.0mm、円環板３の肉厚が2.2mm、リブ４の肉
厚が2.0mm、外円筒１の外径が76.2mm、内円筒２の内径
が25.9mm、両円筒１、２の筒長が34.5mmである。また、
リブ４は縦15mm×横21mmで、切欠部７はリブ４の外端縁
の両隅角部から各円筒１、２の筒長方向と30度の角度で
斜めに下降し、円環板３側の端縁と平行に10mmで進行
し、全体として逆台形になっている。Inventive product I Inventive product I is a 35 mm wide motion picture film with an outer diameter of 3 inches.
It is for 2000-foot winding and has the configuration shown in FIGS. 1 to 3. The outer cylinder 1 has a thickness of 2.1 mm, the inner cylinder 2 has a thickness of 2.0 mm, the annular plate 3 has a thickness of 2.2 mm, the ribs 4 have a thickness of 2.0 mm, and the outer cylinder 1 has an outer diameter of 76.2. mm, the inner cylinder 2 has an inner diameter of 25.9 mm, and both cylinders 1 and 2 have a cylinder length of 34.5 mm. Also,
The rib 4 has a length of 15 mm and a width of 21 mm, and the notch 7 descends diagonally from both corners of the outer edge of the rib 4 at an angle of 30 degrees with the cylinder length direction of the cylinders 1 and 2 to form an annular plate 3. It progresses in parallel with the side edge by 10 mm, and is an inverted trapezoid as a whole.
凸部５は樹脂注入部と反対側の外円筒１の内表面に円環
板に平行に2.5mm間隔で、高さ0.3mm、幅0.5mmで３本形
成した。Three convex portions 5 were formed on the inner surface of the outer cylinder 1 on the side opposite to the resin injection portion in parallel with the annular plate at intervals of 2.5 mm, with a height of 0.3 mm and a width of 0.5 mm.
本考案品II 本考案品IIは、リブ４の形状が縦10mm×横21mmの長方形
に形成されている他は、本考案品Ｉと同一である。Inventive product II Inventive product II is the same as invented product I except that the rib 4 is formed in a rectangular shape with a length of 10 mm and a width of 21 mm.
本考案品III 本考案品IIIは、本考案品Ｉと同一の環状凸部５を形成
した他は、現行品と同一である。Inventive product III Inventive product III is the same as the current product except that the same annular protrusion 5 as in the inventive product I is formed.
比較品 比較品は、凸部５が形成されていない他は、本考案品II
と同一である。Comparative product The comparative product is the product II of the present invention except that the convex portion 5 is not formed.
Is the same as
従来品 従来品は、第６図及び第７図に示すもので、リブ４の寸
法は縦15mm×横21mmである。Conventional product The conventional product is shown in FIGS. 6 and 7, and the dimensions of the rib 4 are 15 mm in length × 21 mm in width.
なお、以上の帯状体用コアは、耐衝撃性ポリスチレン樹
脂（旭化成（株）製商品名スタイロン）を用い、樹脂注
入部Ｇから射出成形により形成された。The above-mentioned core for band-shaped bodies was formed by injection molding from the resin injection part G using an impact-resistant polystyrene resin (trade name: Styron manufactured by Asahi Kasei Co., Ltd.).
実験結果を第１表に示す。The experimental results are shown in Table 1.
評価は下記による。 The evaluation is as follows.
◎…非常に優れている ○…優れている ●…実用限度内 Ａ：ウェルドライン発生度合 目視検査による。◎… very good ○… excellent ●… within practical limits A: Weld line occurrence By visual inspection.
Ｂ：射出成形性 成形品の離型性及びショートショット、変形（そり、よ
じれ）等の成形故障の発生しにくさを官能評価。B: Injection moldability A sensory evaluation of the releasability of the molded product and the difficulty of occurrence of molding failures such as short shots, deformation (warping, kinking), etc.
Ｃ：圧縮強度 東洋精機製作所“ストログラフＲ型”圧縮試験機で測定
した時の最大値。C: Compressive strength Maximum value measured by Toyo Seiki Seisakusho “Strograph R” compression tester.
Ｄ：落下強度 35mm幅の映画用ポジフィルムを2000フィート巻いた製品
を高さ30cmから落下させた時の帯状体用コアの破壊の状
況により官能評価。D: Falling strength Sensory evaluation was made based on the state of breakage of the strip core when a product obtained by rolling 2000 feet of a positive film for cinema with a width of 35 mm was dropped from a height of 30 cm.
本考案は、樹脂注入部と反対側に位置する外円筒の可動
金型用コア側の内表面に前記軸芯と直角方向に形成され
た２以上の環状凸部を形成することにより、キャビティ
ーからの取り出し性を良くすることができ、かつ、樹脂
の流動性が良化してウェルドラインを少なくできるの
で、外観及び物理強度を向上させることができる。さら
に、環状凸部が外円筒の可動金型用コア側の内表面に形
成されているので、手の触覚によりフィルムの端部を挿
入するスリット状溝の方向を即座に理解でき、極めて容
易かつ確実に定められた方向になるように帯状体用コア
を取り付けることができる。According to the present invention, a cavity is formed by forming two or more annular convex portions formed in a direction perpendicular to the axis on the inner surface of the outer cylinder located on the side opposite to the resin injection portion on the side of the movable mold core. It is possible to improve the removability from the resin and improve the fluidity of the resin to reduce the weld line, so that the appearance and physical strength can be improved. Furthermore, since the annular convex portion is formed on the inner surface of the outer cylinder of the movable mold core side, the direction of the slit-shaped groove for inserting the end portion of the film can be immediately understood by the tactile sensation of the hand, which is extremely easy The strip core can be attached so as to be surely oriented.
第１図は樹脂注入部と反対側から見た帯状体用コアの斜
視図、第２図は樹脂注入部と反対側から見た帯状体用コ
アの正面図、第３図は第２図中Ａ−Ａ線断面図、第４図
は樹脂注入部と反対側から見た他の帯状体用コアの斜視
図、第５図は樹脂注入部側から見た他の帯状体用コアの
斜視図、第６図は樹脂注入部側から見た従来の帯状体用
コアの正面図、第７図は第６図中Ｂ−Ｂ線断面図であ
る。 １……外円筒、２……内円筒、３……円環板 ４……リブ、５……環状凸部 ６……樹脂注入口残、Ｇ……樹脂注入部FIG. 1 is a perspective view of the strip core viewed from the side opposite to the resin injection part, FIG. 2 is a front view of the strip core viewed from the side opposite to the resin injection part, and FIG. 3 is in FIG. A sectional view taken along the line AA, FIG. 4 is a perspective view of another core for band-shaped bodies viewed from the side opposite to the resin injection part, and FIG. 5 is a perspective view of another core for band-shaped bodies viewed from the resin injection part side. FIG. 6 is a front view of a conventional core for a band-shaped body viewed from the resin injection portion side, and FIG. 7 is a sectional view taken along line BB in FIG. 1 ... Outer cylinder, 2 ... Inner cylinder, 3 ... Annular plate 4 ... Rib, 5 ... Annular projection 6 ... Resin injection port residue, G ... Resin injection part
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭51−63866（ＪＰ，Ａ) 実開 昭61−86367（ＪＰ，Ｕ) 実開 昭59−67217（ＪＰ，Ｕ) 実開 昭61−196015（ＪＰ，Ｕ) 実開 昭61−128256（ＪＰ，Ｕ) 米国特許4989802（ＵＳ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-51-63866 (JP, A) Actually open 61-86367 (JP, U) Actually open 59-67217 (JP, U) Actually open 61- 196015 (JP, U) Actual development Sho 61-128256 (JP, U) US Patent 4989802 (US, A)
Claims (1)
る内円筒と、両円筒の軸芯と直角方向に形成され、かつ
両円筒の各々の略中央部間を連接する一枚の円環板と、
該円環板の両面に略左右対称で、かつ前記軸芯から放射
方向に形成されて両円筒を連接するリブと、円環板を中
心にして樹脂注入部と反対側に位置する外円筒の可動金
型用コア側の内表面に前記軸芯と直角方向に形成された
２以上の環状凸部とを有する帯状体用コア1. An outer cylinder, an inner cylinder whose axis coincides with the axis of the outer cylinder, a direction perpendicular to the axes of both cylinders, and the substantially central portions of both cylinders are connected to each other. One ring plate,
A rib that is substantially symmetrical on both sides of the annular plate and that is formed in the radial direction from the axis and connects both cylinders, and an outer cylinder that is located on the opposite side of the annular plate from the resin injection portion. A core for a band-shaped body having an inner surface on the core side for a movable mold and two or more annular projections formed in a direction perpendicular to the axis.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987169097U JPH0626526Y2 (en) | 1987-11-06 | 1987-11-06 | Band core |
| US07/268,372 US4989802A (en) | 1987-11-06 | 1988-11-07 | Core for web material |
| US07/926,297 US5252369A (en) | 1987-11-06 | 1992-08-10 | Core for web material |
| US07/952,148 US5414032A (en) | 1987-11-06 | 1992-09-28 | Resin composition for a core for web material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987169097U JPH0626526Y2 (en) | 1987-11-06 | 1987-11-06 | Band core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0175068U JPH0175068U (en) | 1989-05-22 |
| JPH0626526Y2 true JPH0626526Y2 (en) | 1994-07-20 |
Family
ID=31458861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987169097U Expired - Lifetime JPH0626526Y2 (en) | 1987-11-06 | 1987-11-06 | Band core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0626526Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4989802A (en) | 1987-11-06 | 1991-02-05 | Fuji Photo Film Co., Ltd. | Core for web material |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5163866A (en) * | 1975-10-23 | 1976-06-02 | Mitsubishi Electric Corp | SHASHUTSUSEIKEIYOKANAGATANOSEIZOHOHO |
| JPS5967217U (en) * | 1982-10-28 | 1984-05-07 | 住友ベークライト株式会社 | Mold for plastic molding |
| JPH0237798Y2 (en) * | 1984-11-12 | 1990-10-12 | ||
| JPH0237799Y2 (en) * | 1985-01-28 | 1990-10-12 | ||
| JPS61187079U (en) * | 1985-05-08 | 1986-11-21 | ||
| JPS61196015U (en) * | 1985-05-28 | 1986-12-06 |
-
1987
- 1987-11-06 JP JP1987169097U patent/JPH0626526Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4989802A (en) | 1987-11-06 | 1991-02-05 | Fuji Photo Film Co., Ltd. | Core for web material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0175068U (en) | 1989-05-22 |
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