JPS5855763B2 - How to make injection molded shoes - Google Patents
How to make injection molded shoesInfo
- Publication number
- JPS5855763B2 JPS5855763B2 JP55186822A JP18682280A JPS5855763B2 JP S5855763 B2 JPS5855763 B2 JP S5855763B2 JP 55186822 A JP55186822 A JP 55186822A JP 18682280 A JP18682280 A JP 18682280A JP S5855763 B2 JPS5855763 B2 JP S5855763B2
- Authority
- JP
- Japan
- Prior art keywords
- protrusion
- last
- sole
- notch
- midsole
- 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
Landscapes
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は靴底のひけを防止する射出成形靴の製造方法に
係る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing injection molded shoes that prevents sink soles.
射出成形靴は底の厚い部分にひけを生じるのでその部分
の容積を減らす所謂ぬすみと称する凹陥部を設けて肉厚
を減じ、ひけを生じないようにすることが行なわれてい
る。Injection-molded shoes tend to have sink marks in the thick part of the sole, so a recessed part called a so-called "sink" is provided to reduce the volume of the sole to reduce the wall thickness and prevent sink marks from occurring.
射出成形靴の製造方法において、中底のないアッパーを
ラストに装着しアッパーの下縁をコードで緊締するコー
ドラスティング方式を利用して底材料を一体に射出成形
する方法と、アッパーと中底を袋縫いした胛被をラスト
に装着するカリフォルニア方式を利用して底材料を一体
に射出成形する方法に大別される。In the manufacturing method of injection molded shoes, there is a method in which the sole material is integrally injection molded using a cord-lasting method in which an upper without a midsole is attached to the last and the lower edge of the upper is tightened with a cord, and There are two main methods: using the California method, which involves attaching a bag-stitched cover to the last, and then integrally injection molding the bottom material.
前者は中底がないから、ラストの底面に適宜突起を形成
しておけば、靴の中底面に凹陥部を形成させて、ひけを
防止することは容易である。Since the former shoe does not have an insole, it is easy to prevent sink marks by forming a concave part in the insole of the shoe by forming appropriate protrusions on the bottom of the last.
後者の場合は、中底があるために、前者程容易ではない
。The latter case is not as easy as the former because of the insole.
従来カルフォルニア方式の胛被を用いてぬすみを形成す
る試みはあった。Previously, there had been attempts to form a tunnel using a California-style cover.
例えば実公昭49−140239号及びその改良として
中底の外周縁に襞をつけないように縫着作業を改良した
実公昭55−31928号がある。For example, there is Japanese Utility Model Publication No. 49-140239 and, as an improvement thereof, Japanese Utility Model Publication No. 55-31928, in which the sewing operation is improved so that the outer peripheral edge of the insole is not pleated.
しかしこれらはいずれも中底踵部の内面に底材料を射出
して補強梁を形成させるものであって、底材料が軟質塩
化ビニル(以下PVCという)のようなプラスチックス
であるときは、中底内面上に必要な中敷を接着するとき
、PVCなとプラスチックス面と接着させることが必要
となり、可塑剤の浸入移行による接着力の低下対策など
、接着剤の選択に制約が大きくまた、プラスチックスは
疏水性物質であるため溶剤系の接着剤を使用する必要が
あり、水系の接着剤では極性が合わないために使用出来
ないなどの欠点を有していた。However, in all of these, the sole material is injected onto the inner surface of the heel of the midsole to form a reinforcing beam, and when the sole material is a plastic such as soft vinyl chloride (hereinafter referred to as PVC) When adhering the required insole to the inner surface of the bottom, it is necessary to adhere it to the PVC or plastic surface, which imposes great restrictions on the selection of adhesive, such as measures to reduce adhesive strength due to the infiltration and migration of plasticizer. Since plastics are hydrophobic substances, it is necessary to use solvent-based adhesives, and water-based adhesives have the disadvantage that they cannot be used because their polarities do not match.
本発明は上記の欠点を除去してカリフォルニア方式の胛
被を用いて、中底内面に布を残しながら中底面に凹陥部
を形成し、射出成形靴のひけを防止する製造方法を提供
するものである。The present invention eliminates the above-mentioned drawbacks and provides a manufacturing method for preventing sink marks in injection molded shoes by forming a concave part on the midsole surface while leaving the cloth on the inside surface of the midsole using a California method. It is.
以下実施例によって説明する。This will be explained below using examples.
本発明に於ては、靴底6のひけを生じる部位にぬすみを
設けるために、第1図に示す如くラスト2底面の相応部
分に突起9を設け、該突起9の先端10を尖った形状例
えばナイフ状にしたラスト2を用いる。In the present invention, in order to provide a gap in the area of the sole 6 where sink marks occur, a protrusion 9 is provided at a corresponding portion of the bottom surface of the last 2, as shown in FIG. For example, a knife-shaped last 2 is used.
該突起9の形状はほぼ長方形で靴の縦方向に設けるのが
一般的であるが、ぬすみの目的を達するとともに履用し
た時の強度を考慮して適宜に設ける。The protrusion 9 is generally rectangular in shape and is generally provided in the vertical direction of the shoe, but it is provided as appropriate to achieve the purpose of slippage and to provide strength when worn.
該ラスト2にアッパー13と中底7を袋縫した胛被1を
装着し、突起9の部分を中底7の上からゴム板等を用い
て靴の前後方向に往復させながら押さえると、中底7は
突起9の先端10によって切込み11が入れられる。Attach the cover 1 made of the upper 13 and the midsole 7 to the last 2, and press the protrusion 9 from above the midsole 7 with a rubber plate or the like while moving it back and forth in the front and back direction of the shoe. 7 has a notch 11 made by the tip 10 of the protrusion 9.
この時突起9の断面にほぼ模した凹部をもつ治具で中底
7を押えるのも効果的である。At this time, it is also effective to press the midsole 7 with a jig having a concave portion that roughly resembles the cross section of the protrusion 9.
中底7に切込み11が入ったら切込み11の端縁14を
押さえてラスト2の突起9を切込み11を貫通して現出
せしめる。Once the notch 11 is made in the midsole 7, the edge 14 of the notch 11 is pressed down to allow the protrusion 9 of the last 2 to pass through the notch 11 and appear.
後は常法により胛被1を装着したラスト2とサイドモー
ルド3および底モールド4を型組みして形成される空間
部5に、底材料を射出孔15より射出し、冷却後脱型す
ると、第2図および第3図に示す如く中底7面に凹陥部
12がぬすみとして形成された射出成形靴を得る。After that, the bottom material is injected from the injection hole 15 into the space 5 formed by assembling the last 2 with the cover 1 attached, the side mold 3, and the bottom mold 4 in a conventional manner, and after cooling, the mold is removed. As shown in FIGS. 2 and 3, an injection molded shoe is obtained in which a concave portion 12 is formed as a clearance on the 7th surface of the midsole.
ラスト2の突起9の先端10によって中底7に切込み1
1が形成されれば、上記のように必ずしも切込み11の
端縁14を押えて、第1図の点線で示す如くラスト2の
突起9の切込み11から貫通現出せしめる工程を要せず
、中底7に切込み11が形成されたまま又はラスト2の
突起9の先端10が若干切込み11から現出している程
度で射出成形すると、射出された底材料が射出圧によっ
て切込み11の端縁14をラスト2の方へ押え込み、そ
れによりラスト2の突起9は切込み11から現出する結
果となって、所望の凹陥部12が中底7面に形成される
。A cut 1 is made in the inner sole 7 by the tip 10 of the protrusion 9 of the last 2.
1 is formed, it is not necessary to press the edge 14 of the notch 11 as described above and make the protrusion 9 of the last 2 penetrate through the notch 11 as shown by the dotted line in FIG. If injection molding is performed with the notch 11 still formed in the bottom 7 or with the tip 10 of the protrusion 9 of the last 2 slightly exposed from the notch 11, the injected bottom material will press the edge 14 of the notch 11 due to the injection pressure. The last 2 is pressed down, so that the protrusion 9 of the last 2 emerges from the notch 11, and the desired recess 12 is formed on the inner sole 7.
また薄い布の片面に底材料と密着性のよい熱可塑性材料
(例えばPVC底の場合にPVCを使用するなど)を層
着したものを中底7とし、布面を内側にしてアッパー1
3に袋縫いした胛被1を使用すると、ラスト2に装着し
た後何等の工程を要せずそのまま型組して底材料を射出
しても、射出された底材料の熱によって中底7の熱可塑
性材料が軟化して熱時の中底7強度は低減し、底材料の
射出圧によって中底7の薄い布がラスト2の突起9に押
えつけられて、突起9はその先端10によって中底7を
切込みながらこの切込み11を貫通し、所望の凹陥部1
2を中底7面に形成することが出来る。Insole 7 is made by layering a thermoplastic material with good adhesion to the bottom material (for example, using PVC in the case of a PVC sole) on one side of a thin cloth, and upper 1 is made with the cloth side inside.
If you use the cover 1 that is double-stitched on 3, even if you attach it to the last 2, assemble it into a mold without any process, and then inject the bottom material, the heat of the injected bottom material will reduce the heat of the inner sole 7. The plastic material softens and the strength of the midsole 7 during heating is reduced, and the injection pressure of the sole material presses the thin fabric of the midsole 7 against the protrusion 9 of the last 2, and the protrusion 9 is pressed against the protrusion 9 of the last 2 by its tip 10. 7, pass through this notch 11, and form the desired concave portion 1.
2 can be formed on the seven sides of the inner sole.
射出成形後脱型した靴の中底7内面に溶剤系又は水系の
接着剤を塗布して、中敷8を接着し製品を得る。A solvent-based or water-based adhesive is applied to the inner surface of the insole 7 of the shoe that has been removed from the mold after injection molding, and the insole 8 is adhered to obtain a product.
本発明は靴底6のひげを生じる部位に相応するラスト2
の底面に、適宜形状の突起9を設け、その突起9の先端
10を尖った形状としたために、胛被1の中底7をラス
ト2に装着したあとで該ラスト2の突起9の先端10に
より中底7に切込み11を入れるから、突起9が貫通す
べき位置と中底7の切込み11とは完全に一致し、ある
巾を有する突起9が殆んど巾のない切込み11に貫通す
る際、切込み11の端縁14は突起9の側面に沿って残
るから、これによって底材料が中底7内面に洩れること
を防止出来、中底7内面は布面が保たれながら中底7面
の凹陥部12のある射出成形靴が得られ、該凹陥部12
によってひげを防止することが出来る。The present invention provides a last 2 that corresponds to the region of the sole 6 where whiskers occur.
A protrusion 9 of an appropriately shaped shape is provided on the bottom surface of the protrusion 9, and the tip 10 of the protrusion 9 is made into a sharp shape. Since the notch 11 is made in the midsole 7 by , the position where the protrusion 9 should penetrate and the notch 11 in the midsole 7 completely match, and the protrusion 9 having a certain width penetrates the notch 11 which has almost no width. At this time, the edge 14 of the notch 11 remains along the side surface of the protrusion 9, which prevents the sole material from leaking onto the inner surface of the inner sole 7. An injection molded shoe is obtained having a concave portion 12 of
This can prevent beards.
本発明は中底7の内面が布であるため、中敷8の接着に
は水系の接着剤が使用出来、作業性、防災、衛生上の利
点を保ちながら、ひげを防止出来るという優れた効果を
発揮するものである。In the present invention, since the inner surface of the insole 7 is made of cloth, a water-based adhesive can be used for adhering the insole 8, which has the excellent effect of preventing whiskers while maintaining workability, disaster prevention, and hygiene benefits. It is something that demonstrates the.
第1図は本発明の実施態様を示す一部欠切した断面図、
第2図は一実施例の要部を示す一部欠切した斜視図、第
3図は、射出成形靴の平面図である0
1・・・・・・胛被、2・・・・・・ラスト、3・・・
・・・サイドモールド、4・・・・・・底モールド、5
・・・・・・空間部、6・・・・・・靴底、7・・・・
・・中底、8・・・・・・中敷、9・・・・・・突起、
10・・・・・・先端、11・・・・・・切込み、12
・・・・・・凹陥部、13・・・・・・アッパー14・
・・・・・端縁、15・・・・・・射出孔。FIG. 1 is a partially cutaway sectional view showing an embodiment of the present invention;
Fig. 2 is a partially cutaway perspective view showing the main parts of one embodiment, and Fig. 3 is a plan view of an injection molded shoe.・Last, 3...
...Side mold, 4...Bottom mold, 5
・・・・・・Space part, 6... Sole, 7...
... Insole, 8 ... Insole, 9 ... Protrusion,
10... Tip, 11... Cut, 12
・・・・・・Recessed portion, 13... Upper 14・
... Edge, 15 ... Injection hole.
Claims (1)
モールド3及び底モールド4により形成された空間部5
に、底材料を射出して、靴底6を胛被1に一体成形し、
脱型後に中底7面に中敷8を接着する射出成形靴の製造
方法において、靴底6のひけを生じる部位に相当するラ
スト2の底面に適宜形状の突起9を設け、該突起9の先
端10を尖った形状としたラスト2に胛被1を装着し、
該突起9の先端10によって中底7に切込み11を入れ
、該切込み11を貫通した突起9によって中底7面に凹
陥部12を形成し、ひけを防止することを特徴とする上
記の射出成形靴の製造方法。1. A space 5 formed by the last 2 to which the bag-stitched shoe cover 1 is attached, the side mold 3, and the bottom mold 4.
Then, the sole material is injected and the sole 6 is integrally molded on the shoe cover 1.
In a method for manufacturing injection molded shoes in which an insole 8 is bonded to the inner sole 7 surface after demolding, a protrusion 9 of an appropriately shaped shape is provided on the bottom surface of the last 2 corresponding to the area of the sole 6 where sink marks occur. Attach the cover 1 to the last 2 whose tip 10 has a sharp shape,
The injection molding described above is characterized in that a notch 11 is made in the midsole 7 by the tip 10 of the protrusion 9, and a concave portion 12 is formed on the surface of the midsole 7 by the protrusion 9 passing through the notch 11 to prevent sink marks. How to make shoes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55186822A JPS5855763B2 (en) | 1980-12-29 | 1980-12-29 | How to make injection molded shoes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55186822A JPS5855763B2 (en) | 1980-12-29 | 1980-12-29 | How to make injection molded shoes |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57110202A JPS57110202A (en) | 1982-07-09 |
JPS5855763B2 true JPS5855763B2 (en) | 1983-12-12 |
Family
ID=16195206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55186822A Expired JPS5855763B2 (en) | 1980-12-29 | 1980-12-29 | How to make injection molded shoes |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5855763B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6367129A (en) * | 1986-09-09 | 1988-03-25 | Yamaha Corp | Injection molding method dealing with metal foil layer |
JPH02198504A (en) * | 1989-01-26 | 1990-08-07 | Moon Star Co | Injection molding shoe |
-
1980
- 1980-12-29 JP JP55186822A patent/JPS5855763B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS57110202A (en) | 1982-07-09 |
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