JPS63191614A - Molding of synthetic resin hollow wheel - Google Patents
Molding of synthetic resin hollow wheelInfo
- Publication number
- JPS63191614A JPS63191614A JP2314187A JP2314187A JPS63191614A JP S63191614 A JPS63191614 A JP S63191614A JP 2314187 A JP2314187 A JP 2314187A JP 2314187 A JP2314187 A JP 2314187A JP S63191614 A JPS63191614 A JP S63191614A
- Authority
- JP
- Japan
- Prior art keywords
- parison
- synthetic resin
- mold
- molding
- insert member
- 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.)
- Granted
Links
- 229920003002 synthetic resin Polymers 0.000 title claims abstract description 18
- 239000000057 synthetic resin Substances 0.000 title claims abstract description 18
- 238000000465 moulding Methods 0.000 title claims abstract description 12
- 238000000071 blow moulding Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims 1
- 229920001903 high density polyethylene Polymers 0.000 abstract description 4
- 239000004700 high-density polyethylene Substances 0.000 abstract description 4
- 238000007664 blowing Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/4802—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
- B29C2049/2008—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements inside the article
- B29C2049/2013—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements inside the article for connecting opposite walls, e.g. baffles in a fuel tank
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
- B29C2049/2017—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements outside the article
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/4802—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity
- B29C2049/4805—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity by closing the mould halves
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/32—Wheels, pinions, pulleys, castors or rollers, Rims
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、例えば乗用芝刈機等の軽荷型車に使用される
合成樹脂製中空車輪をブロー成形により成形する方法の
改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a method for molding synthetic resin hollow wheels used for light vehicles such as riding lawn mowers by blow molding. .
（従来の技術）
従来、軽量で大量生産可能な合成樹脂製車輪の成形方法
として、軸孔を有するホイール部とタイヤ部をポリエチ
レン等の合成樹脂により一体で中空状に成形することが
実公昭４８−２７４２０号公報等で広く知られている。(Prior art) Conventionally, as a method for molding synthetic resin wheels that are lightweight and can be mass-produced, a wheel portion having an axle hole and a tire portion are integrally molded into a hollow shape using synthetic resin such as polyethylene. It is widely known from Publication No. -27420 and the like.
（発明が解決しようとする問題点）
しかしながら、上記の合成樹脂製車輪をブロー成形法に
より成形する場合には、軸孔を形成するホイール部の肉
厚を十分厚くすることが困難であり、そのためその強度
が不十分であるほか、軸孔の両端口には別途軸受金具を
嵌着して使用しなければならないことが多（、軸受部が
肉厚で強度の大なる車輪を効率よく成形できないという
問題点があった。(Problems to be Solved by the Invention) However, when molding the above synthetic resin wheel by blow molding, it is difficult to make the wall thickness of the wheel portion that forms the shaft hole sufficiently thick. In addition to insufficient strength, it is often necessary to fit separate bearing fittings into both ends of the shaft hole (and the bearing part is thick, making it difficult to form a strong wheel efficiently. There was a problem.
本発明は、この問題点を解決するために提案されたもの
で、成形容易にして軽量でかつ強度の優れた合成樹脂製
中空車輪の成形方法を提供することを目的とするもので
ある。The present invention was proposed to solve this problem, and an object of the present invention is to provide a method for molding a synthetic resin hollow wheel that is easy to mold, lightweight, and has excellent strength.
（問題点を解決するための手段）
上記問題点を解決するため、本発明においては、■ ブ
ロー成形用金型の内面に形成された凹部の底面中央部付
近から略円筒状のインサート部材を突出させた状態に保
持し、
■ 金型内にセットされたパリソンの両側を型締の際に
インサート部材により局部的に押し付け、■ パリソン
の対向する中央部付近同志を局部的に融着させた後、
■ 金型に穿設した貫通孔よりエアーを吹込むことによ
り、
■ パリソンから中空状の車輪本体を形成すると共にイ
ンサート部材から軸受部を形成しかつ両者を同時に固着
するようにした
ことを技術的手段とするものである。(Means for Solving the Problems) In order to solve the above problems, in the present invention, (1) a substantially cylindrical insert member is protruded from near the center of the bottom of the recess formed on the inner surface of the blow molding die; ■ Locally press both sides of the parison set in the mold with insert members during mold clamping, ■ Locally fuse the opposing central parts of the parison together. ■ By blowing air through a through hole drilled in the mold, ■ The hollow wheel body is formed from the parison, the bearing is formed from the insert member, and both are fixed simultaneously. This is a practical means.
（実施例） 以下本発明の一実施例を説明する。(Example) An embodiment of the present invention will be described below.
第１図は中空車輪成形用の金型を示し、ブロー成形用金
型（１）の内面には凹部（２）が凹設されており、この
四部（２）の底面の略中心部から突設された円柱状の凸
部（３）の外側には略円筒状に形成された高密度ポリエ
チレン等の合成樹脂製インサート部材（５）が緩挿され
ており、このインサート部材（５）は凹部（２）の底面
中央部付近から金型内部に向って突出した状態に保持さ
れている。Fig. 1 shows a mold for molding a hollow wheel, and a recess (2) is formed on the inner surface of the blow molding mold (1), protruding from approximately the center of the bottom of the four parts (2). An insert member (5) made of synthetic resin such as high-density polyethylene and formed into a substantially cylindrical shape is loosely inserted into the outside of the provided cylindrical convex portion (3), and this insert member (5) is inserted into the recess. (2) is held in a state protruding from near the center of the bottom surface toward the inside of the mold.
第２図は金型（１）の型締された状態を示し、金型（１
）内にセントされた高密度ポリエチレン等の合成樹脂か
らなるパリソン（６）の中央部付近の両側が左右のイン
サート部材（５）の先端（５ａ）により局部的に押し付
けられ、その対向する中央部付近（６ａ）同志が接触し
て局部的に融着されている。Figure 2 shows the mold (1) in a clamped state.
) Both sides near the center of the parison (6) made of synthetic resin such as high-density polyethylene inserted in Nearby (6a) comrades are in contact and locally fused.
その後、金型（１）に穿設した貫通孔（４）にエアー吹
込用チューブ（図示せず）を挿通し、このチューブの先
端でパリソン（６）の壁を破裂させてからエアーをパリ
ソン（６）内に吹込み、インサート部材を有する中空成
形品を成形する。After that, an air blowing tube (not shown) is inserted into the through hole (4) made in the mold (1), the wall of the parison (6) is ruptured with the tip of this tube, and the air is injected into the parison (6). 6) Blow into the mold to form a hollow molded product with an insert member.
その後、冷却してからこの中空成形品を取り出し、左右
のインサート部材（５）間に形成されているパリソンの
融着部分（６ａ）を欠切して左右のインサート部材（５
）内部に連通した軸孔を形成する。Thereafter, after cooling, this hollow molded product is taken out, the fused part (6a) of the parison formed between the left and right insert members (5) is cut out, and the left and right insert members (5) are removed.
) A shaft hole communicating with the inside is formed.
第３図及び第４図は上記のようにして形成された合成樹
脂製中空車輪を示し、（１１）はパリソン（６）から成
形された中空状の車輪本体で、ウェブ部（１２） 、タ
イヤ部（１３）及びハブ部（１４）が一体に形成されて
いる。Figures 3 and 4 show a hollow wheel made of synthetic resin formed as described above, where (11) is a hollow wheel body formed from a parison (6), a web part (12), and a tire. The portion (13) and the hub portion (14) are integrally formed.
（１６）はインサート部材（５）から成形された内部に
軸孔（１７）を有する軸受部で、ブロー成形時に同時に
車輪本体（１１）のハブ部（１４）と一体固着されてい
る。(16) is a bearing part molded from the insert member (5) and having a shaft hole (17) inside, and is integrally fixed to the hub part (14) of the wheel body (11) at the same time as blow molding.
尚、上記の実施例と異なり、インサート部材をパリソン
と異質の合成樹脂材料で形成しても良いし、金属材料で
形成しても良い。Note that, unlike the above embodiments, the insert member may be made of a synthetic resin material different from the parison, or may be made of a metal material.
又、必要に応じて、車輪本体（１１）に残されたパリソ
ンのエアー注入孔（１５）に合成樹脂材料等を充填しこ
の孔を塞ぐようにしても良い。Further, if necessary, the air injection hole (15) of the parison left in the wheel body (11) may be filled with a synthetic resin material or the like to close this hole.
又、上記の実施例では、インサート部材（５）の外周面
を凹凸にし、車輪本体（１１）のハブ部（１４）と嵌合
状態で固着するようにしているが、インサート部材（５
）の外周面を平滑に形成しても差支えない。Further, in the above embodiment, the outer peripheral surface of the insert member (5) is made uneven so that it is fixed in a fitted state with the hub portion (14) of the wheel body (11).
) may be formed to have a smooth outer peripheral surface.
更に、車輪本体（１１）のタイヤ部（１３）の外周面を
平滑にせずに凹凸面を設けるようにしても良い。Furthermore, the outer circumferential surface of the tire portion (13) of the wheel body (11) may not be smooth but may be provided with an uneven surface.
（発明の効果）
本発明は上記のような構成にしたので、次のような効果
を奏する。(Effects of the Invention) Since the present invention has the above configuration, the following effects are achieved.
■ 軸孔を有する軸受部をインサート部材によらずパリ
ソンから形成する場合には、軸受部の肉厚を十分厚く構
成することができないので径方向及び軸方向の強度が劣
るのに対し、パリソンで形成されるハブ部の内周に別途
成形されたインサート部材からなる軸受部を一体的に固
着できるので、軸受部の強度を著しく上昇させることが
できる。■ If a bearing part with a shaft hole is formed from a parison instead of using an insert member, the wall thickness of the bearing part cannot be made sufficiently thick, resulting in inferior strength in the radial and axial directions. Since the bearing section made of a separately formed insert member can be integrally fixed to the inner periphery of the formed hub section, the strength of the bearing section can be significantly increased.
■ 軸受部をパリソンから形成する場合には、微妙なブ
ロー成形条件の影響により寸法精度を十分なものにでき
ないのに対し、軸受部を形成するインサート部材は別途
インジェクション成形等により精密に形成できるので、
軸受部の寸法精度を非常に良好にすることができる。■ When forming the bearing part from a parison, sufficient dimensional accuracy cannot be achieved due to the influence of delicate blow molding conditions, whereas the insert member that forms the bearing part can be precisely formed separately by injection molding etc. ,
The dimensional accuracy of the bearing portion can be made very good.
■ インサート部材からなる軸受部は車輪本体のブロー
成形工程中に同時にこれに一体固着できるので、車輪本
体成形作業と別途に軸受固着作業を行う必要がなく、製
造効率が優れている。■ Since the bearing made of the insert member can be integrally fixed to the wheel body at the same time during the blow molding process, there is no need to perform bearing fixing work separately from the wheel body molding process, resulting in excellent manufacturing efficiency.
図面は本発明の一実施例を示し、第１図は本発明に用い
る金型の断面図、第２図は型締時を示す断面図、第３図
は本発明嘔より成形された車輪の断面図、第４図はその
側面図である。
（１）・・・金型、 （２）・・・凹部、（５
）・・・インサート部材、（６）・・・パリソン、（１
１）・・・車輪本体、 （１６）・・・軸受部。
第１図
第２図
第３図The drawings show one embodiment of the present invention; FIG. 1 is a cross-sectional view of a mold used in the present invention, FIG. 2 is a cross-sectional view showing the mold during clamping, and FIG. The sectional view and FIG. 4 are its side views. (1)...mold, (2)...recess, (5
)...Insert member, (6)...Parison, (1
1)...Wheel body, (16)...Bearing part. Figure 1 Figure 2 Figure 3
Claims (3)
中央部付近から略円筒状のインサート部材を突出させた
状態に保持し、上記金型内にセットされたパリソンの両
側を型締の際に上記インサート部材により局部的に押し
付け、上記パリソンの対向する中央部付近同志を局部的
に融着させた後、上記金型に穿設した貫通孔よりエアー
を吹込むことにより、上記パリソンから中空状の車輪本
体を形成すると共に上記インサート部材から軸受部を形
成しかつ両者を同時に固着するようにしたことを特徴と
する合成樹脂製中空車輪の成形方法。(1) Hold the approximately cylindrical insert member protruding from near the center of the bottom of the recess formed on the inner surface of the blow molding mold, and clamp both sides of the parison set in the mold. At this time, the parison is pressed locally with the insert member to locally fuse the opposing central portions of the parison together, and then air is blown into the parison through a through hole drilled in the mold. A method for molding a hollow wheel made of synthetic resin, characterized in that a hollow wheel body is formed from the above-mentioned insert member, a bearing portion is formed from the insert member, and both are fixed at the same time.
求の範囲第（１）項記載の合成樹脂製中空車輪の成形方
法。(2) A method for molding a synthetic resin hollow wheel according to claim (1), wherein the insert member is formed of synthetic resin.
範囲第（１）項記載の合成樹脂製中空車輪の成形方法。(3) A method for molding a synthetic resin hollow wheel according to claim (1), wherein the insert member is made of metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2314187A JPH0796258B2 (en) | 1987-02-03 | 1987-02-03 | Molding method for synthetic resin hollow wheels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2314187A JPH0796258B2 (en) | 1987-02-03 | 1987-02-03 | Molding method for synthetic resin hollow wheels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63191614A true JPS63191614A (en) | 1988-08-09 |
| JPH0796258B2 JPH0796258B2 (en) | 1995-10-18 |
Family
ID=12102282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2314187A Expired - Fee Related JPH0796258B2 (en) | 1987-02-03 | 1987-02-03 | Molding method for synthetic resin hollow wheels |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0796258B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102525071B1 (en) * | 2019-10-08 | 2023-04-24 | 엠에이치기술개발 주식회사 | Method For Manufacturing Shape-Customized Hollow Product Using Blow Molding |
-
1987
- 1987-02-03 JP JP2314187A patent/JPH0796258B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0796258B2 (en) | 1995-10-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |