JPH031237Y2 - - Google Patents
Info
- Publication number
- JPH031237Y2 JPH031237Y2 JP15429285U JP15429285U JPH031237Y2 JP H031237 Y2 JPH031237 Y2 JP H031237Y2 JP 15429285 U JP15429285 U JP 15429285U JP 15429285 U JP15429285 U JP 15429285U JP H031237 Y2 JPH031237 Y2 JP H031237Y2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- belt
- outer mold
- inner mold
- molded body
- 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
Links
- 238000000465 moulding Methods 0.000 claims description 22
- 229920005989 resin Polymers 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 229920003002 synthetic resin Polymers 0.000 claims description 4
- 239000000057 synthetic resin Substances 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000007747 plating Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 10
- 238000001746 injection moulding Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 208000031872 Body Remains Diseases 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- 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、合成樹脂製歯付ベルト、合成樹脂製
平ベルト等の、樹脂製動力伝達ベルトの、射出成
形によるベルト製造用成形型に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a mold for producing belts by injection molding of resin power transmission belts such as synthetic resin toothed belts and synthetic resin flat belts.
（従来の技術）
歯付ベルト，平ベルト等の動力伝達用ベルト
は、伝達効率に優れ、比較的高速回転域まで使用
できる性能を持つている。各種機械器具装置の一
動力伝達部材として、ゴム又はポリウレタン製の
歯付ベルトが多用されている。最近、成形工程を
より少なくし、かつ比較的短時間の内に動力伝達
用ベルトを製造すべく、射出成形による樹脂製ベ
ルトを製作することが試みられている。(Prior Art) Power transmission belts such as toothed belts and flat belts have excellent transmission efficiency and can be used up to relatively high speed rotation ranges. 2. Description of the Related Art Toothed belts made of rubber or polyurethane are often used as a power transmission member for various mechanical devices. Recently, attempts have been made to manufacture resin belts by injection molding in order to reduce the number of molding steps and manufacture power transmission belts within a relatively short period of time.
この成形法は通常第６図に例示するようにペレ
ツト状の熱可塑性エラストマーあるいは熱可塑性
樹脂を射出成形機を用いて、180〜230℃の温度下
で溶融せしめ、この資料は供給用ノズル１をスプ
ルー２に当接せしめ、ランナー部３，ゲート部４
を経由して、抗張体５を全周面にスパイラル状に
巻付けた内型６を同心状に内挿せしめた筒状外型
７からなる成形型の内外両型６，７間に形成され
た環状間隙部に注入し、硬化後のベルト成形体８
を取り出して所定のベルト巾に切断して動力伝達
ベルトを得る。 This molding method usually involves melting pellet-shaped thermoplastic elastomer or thermoplastic resin at a temperature of 180 to 230°C using an injection molding machine, as shown in Figure 6. Contact sprue 2, runner part 3, gate part 4
Formed between the inner and outer molds 6 and 7 of a mold consisting of a cylindrical outer mold 7 into which an inner mold 6 with a tensile member 5 spirally wound around the entire circumference is inserted concentrically. The molded belt 8 is injected into the annular gap and cured.
A power transmission belt is obtained by taking out the belt and cutting it into a predetermined belt width.
しかし、上述した射出成形による動力伝達ベル
トの製造にあたつて、製品の取出段階にあつて、
重大な問題の発生をみた。即ち、通常、射出成形
における製品の取出しは、資料の硬化後に、成形
型を分割し、成形型底部に設けた突出ピンにて、
成形品を内側から押し出して取り出しを行つてい
た。 However, in manufacturing the power transmission belt by injection molding as described above, at the stage of taking out the product,
I saw a serious problem occur. That is, normally, to take out the product in injection molding, after the material has hardened, the mold is divided and a protruding pin provided at the bottom of the mold is used to remove the product.
The molded product was removed by pushing it out from the inside.
しかしながら、本考案の対象製品である動力伝
達ベルトは、その形状が環状であり、かつ、その
厚さが、通常0.5〜３mmと薄手であるため、突出
ピンにて、ベルト成形品を押し出すこと自体、非
常に困難である。特に、内型６の外周面にロープ
等の抗張体を５〜15Kgの張力で巻きつけた場合
は、抗張体と内型の捲回張力が強く、実際上突出
ピンぐらいではベルト成形体を円滑に押し出す事
は大変困難な作業であつた。 However, the power transmission belt, which is the target product of this invention, has an annular shape and a thin thickness of usually 0.5 to 3 mm, so it is difficult to push out the belt molded product with a protruding pin. , is very difficult. In particular, when a tensile material such as a rope is wound around the outer circumferential surface of the inner mold 6 with a tension of 5 to 15 kg, the winding tension between the tensile material and the inner mold is strong, and in practice, when the protruding pins are It was a very difficult task to push it out smoothly.
その解決策として、第６図に示すように、内外
両型の型割時、内型６の底部に当接する押出棒９
を用いて、ベルト成形体を残して内型６のみを抜
き出す手段が試みられたが、ロープ等の抗張体５
の内型６への捲回張力が余りに強力であるため、
ベルト成形体８は、内型６に付着した状態で、内
型６と共に抜き出されて来る。 As a solution to this problem, as shown in FIG.
Attempts have been made to extract only the inner mold 6 leaving the belt molded body by using a tensile material 5 such as a rope.
Because the winding tension on the inner mold 6 is too strong,
The belt molded body 8 is pulled out together with the inner mold 6 while being attached to the inner mold 6.
そのため、やむなく第７図に示すように、内型
６の外径より稍々大きい内径を有する円筒状の抜
き出し治具９ａを押しつけて再度内型６からベル
ト成形体８を抜き出す作業を繰返さなければなら
なかつた。 Therefore, as shown in FIG. 7, it is necessary to press a cylindrical extracting jig 9a having an inner diameter slightly larger than the outer diameter of the inner die 6 and repeat the process of extracting the belt molded body 8 from the inner die 6 again. It didn't happen.
また、抗張体５を欠くベルト成形体にあつて
も、内型６の表面の形状、粗度、離型剤の状態に
よつては、同じくベルト成形体８は内型６と一体
となつて抜き出されて来る場合が多かつた。 Furthermore, even in the case of a belt molded body lacking the tensile body 5, depending on the shape and roughness of the surface of the inner mold 6, and the condition of the mold release agent, the belt molded body 8 may become integral with the inner mold 6. In many cases, they were singled out.
（考案が解決しようとする問題点）
以上のとおり、従来の技術は、成形工程が多
く、動力伝達用ベルトを製造するにあたり、人的
工数を要し、この分、動力伝達用ベルトの製造
に、射出成形法を採用するメリツトが大きく減じ
られているのが現状であつた。(Problems to be solved by the invention) As mentioned above, the conventional technology requires many molding steps and requires man-hours to manufacture the power transmission belt. At present, the merits of adopting injection molding methods have been greatly reduced.
本考案は、従来技術の持つこれらの欠点を十分
把握し、成形型の内型抜き取り時に、常に外型側
に、ベルト成形体が付着するよう構成した樹脂ベ
ルト製造用成形型を提供する事により、内型から
ベルト成形体を分離する手数の係る工程を取り除
き、動力伝達ベルトの製造の格段の能率向上を図
ることを目的とするものである。 The present invention fully grasps these drawbacks of the conventional technology and provides a mold for manufacturing resin belts that is configured so that the belt molded body always adheres to the outer mold side when the inner mold is removed. The object of the present invention is to eliminate the time-consuming process of separating the belt molded body from the inner mold, thereby significantly improving the efficiency of manufacturing power transmission belts.
（問題を解決するための手段）
本考案はこの目的を達成するために、本考案は
つぎのような構成としている。即ち、筒状外型内
に同心状に内型を挿入し両型間に合成樹脂資料注
入用環状間隙部を形成すると共に、内外両型のい
ずれか一方が軸線方向に移動可能である射出成形
によるベルト製造用成形型にあつて、外型の製品
成形面の少なくとも一部に凹陥部を設けたことを
特徴とする樹脂ベルト製造用成形型にある。(Means for solving the problem) In order to achieve this object, the present invention has the following configuration. That is, injection molding in which an inner mold is inserted concentrically into a cylindrical outer mold to form an annular gap for injecting a synthetic resin material between the two molds, and one of the inner and outer molds is movable in the axial direction. A mold for manufacturing a resin belt according to the present invention is characterized in that a concave portion is provided in at least a part of the product molding surface of the outer mold.
（作用）
樹脂製資料の内外両型間の間隙部への注入時、
外型の製品成形面に設けられた凹陥部に注入資料
の一部が充填され、硬化して、ベルト成形体の外
周部に突片を成形し、ベルト成形体のこの突片と
外型の凹陥部が、内外両型の分離時にあつても依
然その係合状態を持続して、ベルト成形体の外型
成形面からの分断を防ぐため内型の軸線方向への
引抜き時にもベルト成形体は常に外型側に残留す
る。(Function) When injecting into the gap between the inner and outer molds of resin materials,
A portion of the injected material is filled into the recesses provided on the product forming surface of the outer mold, hardens, and forms a protrusion on the outer periphery of the belt molding, and this protrusion of the belt molding and the outer mold Even when the inner and outer molds are separated, the concave portion maintains its engaged state and prevents the belt molded product from being separated from the outer molding surface, even when the inner mold is pulled out in the axial direction. always remains on the outer mold side.
（実施例）
つぎに、本考案の具体的実施例を図面を用いて
説明する。(Example) Next, a specific example of the present invention will be described using the drawings.
第１図は本考案に係る樹脂ベルト製造用成形型
の中央縦断面図で、円筒状外型１０には同心状に
内型１２が挿入されている。そして外型１０の底
壁１１には等間隔の中心角をもつて複数本のガイ
ドバー１３が植設され、このガイドバー１３群は
外型１０の軸線方向に一致して外型１０内に伸び
（その詳細は第２図に示されている）、前記内型１
２は、内型１２の胴部軸線方向に予め穿設された
長孔（図示省略）にガイドバー１３がそれぞれ挿
通し、このガイドバー１３群に案内されて外型１
０内に平行状態を保つて挿入され、内外両型１
０，１２間には、成形される樹脂ベルトの厚みに
一致する環状間隔１４が形成される。 FIG. 1 is a central vertical sectional view of a mold for manufacturing a resin belt according to the present invention, in which an inner mold 12 is inserted concentrically into a cylindrical outer mold 10. A plurality of guide bars 13 are implanted in the bottom wall 11 of the outer mold 10 with central angles at equal intervals, and the group of guide bars 13 aligns with the axial direction of the outer mold 10 and is inserted into the outer mold 10. elongation (the details of which are shown in FIG. 2), the inner mold 1
2, guide bars 13 are inserted into elongated holes (not shown) drilled in advance in the axial direction of the body of the inner mold 12, and the outer mold 1 is guided by the group of guide bars 13.
It is inserted in parallel state inside 0, and both inside and outside type 1
An annular interval 14 is formed between 0 and 12, which corresponds to the thickness of the resin belt to be molded.
又外型１０の開口部側には、該開口部を閉塞す
るランナープレート１６が配され、ランナープレ
ート１６には熱可塑性エラストマーあるいは熱可
塑性樹脂などの資料を供給するノズル１７との連
絡口となるスプール１８が設けられており、ラン
ナープレート１６が外型１０と接し、外型１０の
開口部を閉塞することにより、ランナープレート
１６の幅狭のゲート部２０およびランナー部１９
と成形型の前記環状間隙１４とは一連に連通す
る。 Further, a runner plate 16 is disposed on the opening side of the outer mold 10 to close the opening, and the runner plate 16 serves as a communication port with a nozzle 17 that supplies a material such as thermoplastic elastomer or thermoplastic resin. A spool 18 is provided, and the runner plate 16 contacts the outer mold 10 and closes the opening of the outer mold 10, so that the narrow gate portion 20 of the runner plate 16 and the runner portion 19
and the annular gap 14 of the mold are in continuous communication.
２２は外型１０の底部側に配された内型１２の
抜出機構で、外型１０と一体に形成された枠体２
３内には、端部に方形のプレート２４を固着せし
めた押棒２５が収容され、該押棒２５の先端は外
型１０の底壁１１に設けた透孔２６より外型１０
内に突出する。この押棒２５の突出運動は枠体２
３の端壁２７より侵入する射出成形機（図示省
略）に固定された長尺の突出棒２８が、外型１０
の後退動に伴い押棒２５端部に固着されたプレー
ト２４に当接し、押棒２５の外型１０内への突出
により内型１２は外型１０の軸線方向への移動と
なり、内外両型１２，１０の組合せは解体され
る。 Reference numeral 22 denotes an ejection mechanism for the inner mold 12 disposed on the bottom side of the outer mold 10, and a frame body 2 integrally formed with the outer mold 10.
A push rod 25 having a rectangular plate 24 fixed to the end thereof is housed in the interior of the outer mold 10 through a through hole 26 provided in the bottom wall 11 of the outer mold 10.
protrude inward. This protruding movement of the push rod 25 is caused by the frame 2
A long protruding rod 28 fixed to an injection molding machine (not shown) enters from the end wall 27 of the outer mold 10.
As the push rod 25 moves backward, it comes into contact with the plate 24 fixed to the end of the push rod 25, and as the push rod 25 protrudes into the outer mold 10, the inner mold 12 moves in the axial direction of the outer mold 10, and both the inner and outer molds 12, The 10 combinations are dismantled.
尚、図示する内型１２は平ベルト製造用のもの
であるが、歯付ベルト製造の場合は、内型１２の
表面に軸方向にのびる同一ピツチの溝群を刻設せ
しめ、その横断面は歯車状を呈する内型となる。 The illustrated inner mold 12 is for manufacturing flat belts, but in the case of manufacturing toothed belts, grooves of the same pitch extending in the axial direction are carved on the surface of the inner mold 12, and the cross section thereof is The inner mold is gear-shaped.
以上の構成からなる成形型にあつて、本考案の
主要構成部は外型１０の製品成形面１５に形成さ
れる凹陥部２９の存在である。 In the mold having the above configuration, the main component of the present invention is the presence of the recess 29 formed on the product molding surface 15 of the outer mold 10.
第１図に例示する凹陥部２９は樹脂資料注入部
より最も遠い部分、即ち外型１０の底壁１１と接
する製品成形面１５の全周に亘つて設けられた環
状溝をもつて示されている。この凹陥部たる環状
溝はその幅0.5〜5.0mm、高さ0.5〜5.0mmで、完成
するベルト成形体の外型１０との係合強度、この
部分にて使用される樹脂資料の経済性、内型表面
の粗度、その他多方面からの綜合的考察より、こ
の凹陥部２９の形状、大きさ、個数およびその配
設位置は適宜選択される。第１図に例示する、外
型製品成形面１５の全周に及び環状凹陥部２９は
外型とベルト成形体との強固な係合度を確保する
上から望ましい形状の一つである。 The concave portion 29 illustrated in FIG. 1 is shown as having an annular groove provided over the entire circumference of the product molding surface 15 that is in contact with the part farthest from the resin material injection portion, that is, the bottom wall 11 of the outer mold 10. There is. This annular groove, which is a concave part, has a width of 0.5 to 5.0 mm and a height of 0.5 to 5.0 mm, and is designed to improve the engagement strength with the outer mold 10 of the completed belt molded body, the economical efficiency of the resin material used in this part, The shape, size, number, and location of the recessed portions 29 are appropriately selected based on the roughness of the inner mold surface and comprehensive consideration from various other aspects. The annular concave portion 29 extending over the entire circumference of the outer mold product forming surface 15 illustrated in FIG. 1 is one of the desirable shapes from the viewpoint of ensuring a strong engagement between the outer mold and the belt molded body.
内型１２の外周面には、ロープ抗張体３０がス
パイラル状に巻かれて、この内型１２は外型１０
に内装され、内外両型１２，１０の環状間隙部１
４には樹脂資料が圧注入され、その結果、内外両
型間には、その端部に外向き環状突片３１を一体
に隆設せしめたベルト成形体３２が製出される。
ベルト成形体３２の硬化後、第３図に図示するよ
うに、外型１０が適宜の手段をもつて左側方向に
後退し、押棒２５の端部に固定されたプレート２
４に、射出成形機に固定され、定位置を確保する
突出棒２８が当接し、さらに外型１０の後退に伴
い、押棒２５の先端が内型１２の端壁面を押す。
この外型１０および内型１２の抜脱作業の折、ベ
ルト成形体３２に一体に隆設した外向き環状突片
３１は依然として外型１０の凹陥部２９内に嵌
合、係止され、ベルト成形体は外型１０の製品成
形面１５に付着している。かくして外型１０内に
ベルト成形体３２を残して内型１２は押棒２５に
よつて、かつガイドバー１３群を案内としながら
抜き出される。 A rope tensile body 30 is spirally wound around the outer peripheral surface of the inner mold 12, and the inner mold 12 is connected to the outer mold 10.
The annular gap 1 of both the inner and outer molds 12 and 10 is
A resin material is injected into the belt 4, and as a result, a belt molded body 32 is produced between the inner and outer dies, with an outward annular protrusion 31 integrally protruding from its end.
After the belt molded body 32 has hardened, the outer mold 10 is moved back to the left by an appropriate means, and the plate 2 fixed to the end of the push rod 25 is removed, as shown in FIG.
4, a protruding rod 28 that is fixed to the injection molding machine and secures a fixed position comes into contact with it, and as the outer mold 10 retreats, the tip of the push rod 25 pushes the end wall surface of the inner mold 12.
During this removal work of the outer mold 10 and the inner mold 12, the outward annular protrusion 31 integrally provided on the belt molded body 32 is still fitted and locked in the recessed part 29 of the outer mold 10, and the belt The molded body is attached to the product molding surface 15 of the outer mold 10. In this way, the inner mold 12 is pulled out with the push rod 25 and the group of guide bars 13 as a guide, leaving the belt molded body 32 in the outer mold 10.
内型１２が完全に抜脱した外型１０に依然付着
したベルト成形体３２は外型１０の製品成形面１
５より剥離して取出される。尚ベルト成形体３２
は内側への屈撓性は良好であるので、簡単に外型
よりめくり状にはがすことができる（第４図参
照）。 The belt molded body 32 still attached to the outer mold 10 from which the inner mold 12 has been completely removed is the product forming surface 1 of the outer mold 10.
It is peeled off and taken out from 5. Additionally, the belt molded body 32
has good inward flexibility, so it can be easily peeled off from the outer mold (see Figure 4).
以上の説明にあつては、押棒２５は成形型の互
換性を向上せしめるために設けたものであるが、
成形型の互換性がそれほど重要視されない場合
は、射出成形機の突出棒２８の先端を直接内型の
端壁に当接せしめる構成を採用してもよい。 In the above explanation, the push rod 25 is provided to improve the compatibility of molds, but
If compatibility of molds is not so important, a configuration may be adopted in which the tip of the protruding rod 28 of the injection molding machine is brought into direct contact with the end wall of the inner mold.
第５図は内型１２をランナープレート１６に螺
着２１手段などにて固着せしめ、ランナープレー
ト１６の移動を内型１２の抜出作業に直結せしめ
る構成としたもので、この構成は内型の移動距離
が大きく取れる場合、又は内型１２をランナープ
レート１６に固定したまま成形型の片側を回転さ
せ、一つの機構で、内型１２周面へのロープ抗張
体３０のスパイラル状の巻付け作業、樹脂資料の
注入およびベルト成形体の幅切り作業を行う場合
など特に有効である。 FIG. 5 shows a structure in which the inner mold 12 is fixed to the runner plate 16 by screws 21 or the like, and the movement of the runner plate 16 is directly connected to the extraction operation of the inner mold 12. If a long movement distance is possible, or by rotating one side of the mold while fixing the inner mold 12 to the runner plate 16, the rope tensile body 30 can be spirally wrapped around the inner mold 12 using a single mechanism. This is particularly effective when performing work, injecting resin materials, and cutting the width of belt molded bodies.
尚、本考案にあつては、成形型を構成する内型
１２の表面はベルト成形体３２との分離が円滑に
進行することが重要な課題である。 In the present invention, it is important that the surface of the inner mold 12 constituting the molding die be smoothly separated from the belt molded body 32.
よつて、内型の表面は可能な限り平滑であるこ
とが望まれ、そのために内型表面に硬質クロムメ
ツキを施すことは本考案の効果を高める上からも
有効である。 Therefore, it is desired that the surface of the inner mold is as smooth as possible, and for this purpose, applying hard chrome plating to the surface of the inner mold is also effective in enhancing the effects of the present invention.
（考案の効果）
本考案はベルト成形体の製造の過程にて、外型
の製品成形面の適宜な個所に形成した凹陥部を用
いてベルト成形体と一体に突片を形成せしめ、硬
化後のベルト成形体のこの突片は依然として、外
型の凹陥部と嵌合し、係止状態を保持しているこ
とを積極的に利用して、外型よりの内型の抜脱作
業時、ベルト成形体を外型の製品成形面にはりつ
き状に残し、内型との分離を容易なものとし、内
型の外型よりの抜脱後、ベルト成形体の内側への
屈撓性の良好さを利用することにより、外型より
のベルト成形体の分離は簡易なものとなり、従来
の内型表面に付着したベルト成形体の取外し作業
に比べ、その作業性は顕著に改善され、射出成形
による樹脂ベルトの製造能率を飛躍的に向上せし
めることができ、併せてベルト成形体の成形型よ
りのこの無理のない取外しは、ベルト成形体を損
傷せしめる危惧もなく、良質の樹脂ベルトの量産
に大きく貢献するものである。(Effects of the invention) The present invention uses recesses formed at appropriate locations on the product molding surface of the outer mold to form protrusions integrally with the belt molding during the manufacturing process of the belt molding, and after curing. This projecting piece of the belt molded body still fits into the recessed part of the outer mold and maintains the locked state, which is actively used to remove the inner mold from the outer mold. The belt molded body remains stuck to the product molding surface of the outer mold, making it easy to separate from the inner mold, and after the inner mold is removed from the outer mold, the belt molded body has good inward flexibility. By utilizing this, the separation of the belt molding from the outer mold becomes simple, and the workability is significantly improved compared to the conventional work of removing the belt molding that adheres to the inner mold surface. The manufacturing efficiency of resin belts can be dramatically improved by this method, and the easy removal of the belt molding from the molding die eliminates the risk of damaging the belt molding, making it possible to mass-produce high-quality resin belts. This is a major contribution.
第１図は本考案を実施したベルト成形型の中央
縦断面図、第２図は第１図の１部の拡大詳細図、
第３図はベルト成形体硬化後の外型より内型を引
き抜く状況の第１図に相当する図、第４図はベル
ト成形体の外型からの分離状況を示す断面説明
図、第５図は他のベルト成形型を示す第１図に相
当する図、第６図は従来のこのベルト成形型の第
１図に相当する図、第７図は従来の内型よりベル
ト成形体を取り外す状況を示す断面説明図であ
る。
図中、１０は筒状外型、１２は内型、１４は環
状間隙、１５は外型の製品成形面、２２は抜出機
構、２５は押棒、２９は凹陥部、３１は突片、３
２はベルト成形体を示す。
Fig. 1 is a central longitudinal sectional view of a belt molding die implementing the present invention, Fig. 2 is an enlarged detailed view of a portion of Fig. 1,
FIG. 3 is a diagram corresponding to FIG. 1 showing the state in which the inner mold is pulled out from the outer mold after the belt molded body has hardened, FIG. 4 is a cross-sectional explanatory diagram showing the separation of the belt molded body from the outer mold, and FIG. is a diagram corresponding to FIG. 1 showing another belt mold, FIG. 6 is a diagram corresponding to FIG. 1 of this conventional belt mold, and FIG. 7 is a state in which the belt molded body is removed from the conventional inner mold. FIG. In the figure, 10 is a cylindrical outer mold, 12 is an inner mold, 14 is an annular gap, 15 is a product forming surface of the outer mold, 22 is an extraction mechanism, 25 is a push rod, 29 is a recessed part, 31 is a protruding piece, 3
2 shows a belt molded body.
Claims (1)
合成樹脂資料注入用環状間隙部を形成すると共
に、内外両型のいずれか一方が軸線方向に移動
可能である射出成形によるベルト製造用成形型
にあつて、外型の製品成形面の少なくとも一部
に凹陥部を設けたことを特徴とする樹脂ベルト
製造用成形型。 (2) 前記凹陥部が環状溝をもつて構成されている
実用新案登録請求の範囲第１項記載の樹脂ベル
ト製造用成形型。 (3) 内型の表面には硬質クロムメツキが施されて
いる実用新案登録請求の範囲第１項又は第２項
記載の樹脂ベルト製造用成形型。[Claims for Utility Model Registration] (1) An inner mold is inserted concentrically into a cylindrical outer mold, an annular gap for injection of synthetic resin material is formed between the two molds, and one of the inner and outer molds is 1. A mold for manufacturing a resin belt, which is movable in the axial direction and is characterized in that the mold is provided with a concave portion in at least a part of the product molding surface of the outer mold. (2) The mold for manufacturing a resin belt according to claim 1, wherein the recessed portion has an annular groove. (3) The mold for manufacturing a resin belt according to claim 1 or 2 of the utility model registration claim, wherein the surface of the inner mold is coated with hard chrome plating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15429285U JPH031237Y2 (en) | 1985-10-07 | 1985-10-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15429285U JPH031237Y2 (en) | 1985-10-07 | 1985-10-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6260314U JPS6260314U (en) | 1987-04-14 |
| JPH031237Y2 true JPH031237Y2 (en) | 1991-01-16 |
Family
ID=31073952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15429285U Expired JPH031237Y2 (en) | 1985-10-07 | 1985-10-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH031237Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6017903B2 (en) * | 2012-09-20 | 2016-11-02 | サトーホールディングス株式会社 | Endless belt manufacturing apparatus and manufacturing method thereof |
-
1985
- 1985-10-07 JP JP15429285U patent/JPH031237Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6260314U (en) | 1987-04-14 |
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