JPH08183061A - Hollow product made of synthetic resin and manufacture thereof by injection molding method - Google Patents

Hollow product made of synthetic resin and manufacture thereof by injection molding method

Info

Publication number
JPH08183061A
JPH08183061A JP6337594A JP33759494A JPH08183061A JP H08183061 A JPH08183061 A JP H08183061A JP 6337594 A JP6337594 A JP 6337594A JP 33759494 A JP33759494 A JP 33759494A JP H08183061 A JPH08183061 A JP H08183061A
Authority
JP
Japan
Prior art keywords
semi
molded product
product
molded
synthetic resin
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
Application number
JP6337594A
Other languages
Japanese (ja)
Other versions
JP3012914B2 (en
Inventor
Shozo Nishida
正三 西田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Steel Works Ltd
Original Assignee
Japan Steel Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Japan Steel Works Ltd filed Critical Japan Steel Works Ltd
Priority to JP6337594A priority Critical patent/JP3012914B2/en
Publication of JPH08183061A publication Critical patent/JPH08183061A/en
Application granted granted Critical
Publication of JP3012914B2 publication Critical patent/JP3012914B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection 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
    • B29C45/14467Joining articles or parts of a single article
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/70Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by moulding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112Single lapped joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/545Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles one hollow-preform being placed inside the other
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection 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
    • B29C45/14467Joining articles or parts of a single article
    • B29C2045/14524Joining articles or parts of a single article making hollow articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/006Joining parts moulded in separate cavities
    • B29C45/0062Joined by injection moulding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

PURPOSE: To provide a manufacture of a hollow product made of a synthetic resin by an injection molding method, which causes no deformation of a joint even in the case of injection under a high injection pressure, can obtain a sufficient joint strength and, moreover, can perform molding even in the case of the small number of gates. CONSTITUTION: In molding, a flanged part 5 having a shape of projecting outward from a container part is formed integrally with a first semi-finished product 1, and, in a similar manner, a flanged part 12 having a shape of projecting outward from the periphery of a plate part 11 is also formed integrally with a second semi-finished product 10. In forming, the flanged parts 5, 12 of the first and second semi-finished products 1, 10 are held in a state that they are superposed on each other by molds 20, 30, and molten resin is injected into a cavity 34 defined between the flanged parts 5, 12 to make the first and second semi-finished products into one body.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、第1半成形品と、第2
半成形品とが接合された合成樹脂製中空製品および一次
成形において第1半成形品と、第2半成形品とを成形
し、二次成形において第1半成形品と第2半成形品とを
射出成形法により一体化して中空製品を製造する、射出
成形法による合成樹脂製中空製品の製造方法に関するも
のである。
The present invention relates to a first semi-molded article and a second semi-molded article.
Hollow product made of synthetic resin in which a semi-molded product is joined and a first semi-molded product and a second semi-molded product in the primary molding, and a first semi-molded product and a second semi-molded product in the secondary molding The present invention relates to a method for producing a hollow product made of a synthetic resin by an injection molding method, which comprises integrally manufacturing a hollow product by injection molding.

【0002】[0002]

【従来の技術】合成樹脂製の中空成形品の製造方法とし
ては、ブロー成形法、ガスインジェクション法等が知ら
れているが、本出願人は例えば特開平6ー238707
号により射出成形機による合成樹脂製中空成形品の製造
方法を提案した。この射出成形機による合成樹脂製中空
成形品の製造方法は、一対の半中空成形品を接合して1
個の中空成形品を得る方法で、この製造方法により、図
5に示されているように、1次成形において中空成形品
を二つ割の半中空品H、Jとして成形し、そして金型
K、Lに半中空品H、Jの分割部が型締めするとき突き
合わさるように装着し、次いで型締めしてスプルーMか
ら分割部のリング状の接合凹部Nに溶融樹脂を射出し
て、二つ割の半中空品H、Jが一体化された合成樹脂製
中空成形品が得られる。
2. Description of the Related Art Blow molding, gas injection and the like are known as methods for producing hollow molded articles made of synthetic resin, and the applicant of the present invention has disclosed, for example, in Japanese Unexamined Patent Publication No. 6-238707.
No. 1 proposed a method of manufacturing a synthetic resin hollow molded product using an injection molding machine. This injection molding machine is used to manufacture a synthetic resin hollow molded article by joining a pair of semi-hollow molded articles.
This is a method of obtaining individual hollow molded products, and by this manufacturing method, as shown in FIG. 5, the hollow molded product is molded into two half-hollow products H and J in the primary molding, and the mold is made. The semi-hollow products H and J are attached to K and L so as to abut each other when the mold is clamped, and then the mold is clamped to inject the molten resin from the sprue M into the ring-shaped joint recess N of the split part. A hollow molded product made of synthetic resin, in which the semi-hollow products H and J of 20% are integrated, is obtained.

【0003】[0003]

【発明が解決しようとする課題】本出願人が提案した射
出成形機を使用した製造方法によると、完全に密封され
た合成樹脂製中空成形品を作ることができると共に、均
一な肉厚の中空成形品を作ることもできる。また複雑な
形状にも対処できる等の数々の利点が得られる。しかし
ながら、改良すべき点も認められる。例えば、この方法
では分割部を突き合わせ、そして分割部のリング状の接
合凹部Nに溶融樹脂を射出して一体化しているので、一
対の半中空成形品の接合部の形状から接合部の強度を上
げることができない、変形する、漏れる等の問題が生じ
ることがある。また、従来は溶融樹脂をただ射出して接
合しているので、接合部の美観にも問題がある。さらに
詳しく説明すると、射出する溶融樹脂の圧力は、図5に
おいて矢印で示されているように金型K、Lで支持され
ていない接合部分にも直接作用する。そして半中空品
H、Jの分割部は、射出される溶融樹脂により接合され
るので、溶融樹脂の温度により分割部が一部溶かされ
る。このように接合部は、一部溶かされ、そして樹脂圧
力が作用しているので、変形することがある。変形する
と、溶融樹脂は溶けた分割部から圧力により内部へ漏れ
ることもある。漏れると、接合強度が低下するばかりで
なく、形状が損なわれ商品価値が低下することにもな
る。したがって、射出速度あるいは圧力、溶融樹脂の温
度等に制約を受け、接合部の強度不足を招くこともあ
る。また、射出圧力を低くしなければならないので、充
填距離が短くなり複数個のゲートを設けなければならな
いことにもなる。これを避けるために、分割部の肉厚を
大きくすると、樹脂量が増えることになる。本発明は、
上記したような問題点を解消した合成樹脂製中空製品お
よびその製造方法を提供しようとするもので、具体的に
は接合強度の大きい射出成形法による合成樹脂製中空製
品を提供すること目的とし、また接合強度が大きと共に
接合部の美観も向上した射出成形法による合成樹脂製中
空製品を提供すること目的としている。また、高い射出
圧力で射出しても接合部の変形がなく、しかも充分な接
合強度が得られ、さらにはゲート数が少なくても成形で
きる、射出成形法による合成樹脂製中空製品の製造方法
を提供することも目的としている。
According to the manufacturing method using an injection molding machine proposed by the present applicant, a completely sealed hollow molded product made of synthetic resin can be produced and a hollow with a uniform wall thickness. Molded parts can also be made. In addition, there are many advantages such as being able to deal with complicated shapes. However, some points need to be improved. For example, in this method, the divided portions are abutted, and the molten resin is injected into the ring-shaped joint concave portion N of the divided portion to integrate them, so that the strength of the joint portion can be determined from the shape of the joint portion of the pair of semi-hollow molded products. Problems such as being unable to raise, deforming and leaking may occur. Further, conventionally, since the molten resin is simply injected and joined, there is a problem in the appearance of the joined portion. More specifically, the pressure of the molten resin to be injected also directly acts on the joint portion which is not supported by the molds K and L as indicated by the arrow in FIG. Since the split parts of the semi-hollow products H and J are joined by the molten resin to be injected, the split parts are partially melted by the temperature of the molten resin. As described above, the joint portion is partially melted, and the resin pressure acts, so that the joint portion may be deformed. When deformed, the molten resin may leak inside due to pressure from the melted divided portion. If it leaks, not only the joint strength will decrease, but also the shape will be impaired and the commercial value will decrease. Therefore, the injection speed or pressure, the temperature of the molten resin, and the like are restricted, and the strength of the joint may be insufficient. Further, since the injection pressure has to be lowered, the filling distance is shortened and a plurality of gates must be provided. To avoid this, if the wall thickness of the divided portion is increased, the amount of resin will increase. The present invention
It is intended to provide a synthetic resin hollow product and a method for producing the same that solves the above-mentioned problems, specifically, to provide a synthetic resin hollow product by a large injection molding method having a large bonding strength, Another object of the present invention is to provide a synthetic resin hollow product manufactured by an injection molding method, which has a high joint strength and an improved aesthetics of the joint. In addition, a method for producing a hollow synthetic resin product by injection molding, which does not deform the joint even when injected with a high injection pressure, can obtain sufficient joint strength, and can be molded even with a small number of gates. It is also intended to be provided.

【0004】[0004]

【課題を解決するための手段】本発明に係わる合成樹脂
製中空製品は、上記目的を達成するために、第1半成形
品と、第2半成形品とが接合された合成樹脂製中空製品
であって、前記第1半成形品と第2半成形品は、前記第
1半成形品の容器部から外方に突出した形のフランジ部
と、前記第2半成形品の周囲から外方に突出した形のフ
ランジ部とが射出成形により接合一体化されるように構
成される。そして請求項2記載の発明は請求項1記載の
フランジ部の先端面部は、接合のためにた射出した樹脂
により覆われている。請求項3記載の発明は、一次成形
において第1半成形品と、第2半成形品とを成形し、二
次成形において前記第1半成形品と第2半成形品とを射
出成形法により一体化して中空製品を製造する合成樹脂
製中空製品の製造方法であって、前記一次成形におい
て、前記第1半成形品には容器部から外方に突出した形
のフランジ部を一体形成すると共に、前記第2半成形品
にも同様に周囲から外方に突出した形のフランジ部を一
体形成し、前記二次成形において、前記第1、2半成形
品のフランジ部を金型により重ね合わせた状態に保持
し、そして前記フランジ部の間のキャビティに溶融樹脂
を射出して、前記第1、2半成形品を一体化するように
構成される。請求項4記載の発明は請求項3記載の一次
成形において、第1半成形品のフランジ部は内周面側
に、そして第2半成形品のフランジ部は外周面側に所定
深さの段部を有するように成形し、請求項5記載の発明
は請求項3または4記載の一次成形において、第2半成
形品のフランジ部の内周面側は外方に向かってテーパ状
に広がるテーパ部を有するように成形する。
In order to achieve the above object, a synthetic resin hollow product according to the present invention is a synthetic resin hollow product in which a first semi-molded product and a second semi-molded product are joined. The first semi-molded product and the second semi-molded product are a flange part projecting outward from the container part of the first semi-molded product and an outer part from the periphery of the second semi-molded product. It is configured such that the flange portion protruding inward is joined and integrated by injection molding. In the invention according to claim 2, the front end surface portion of the flange portion according to claim 1 is covered with the injected resin for joining. In the invention according to claim 3, the first semi-molded product and the second semi-molded product are molded in the primary molding, and the first semi-molded product and the second semi-molded product are molded by the injection molding method in the secondary molding. A method for manufacturing a synthetic resin hollow product for integrally manufacturing a hollow product, wherein in the primary molding, a flange portion projecting outward from a container portion is integrally formed with the first semi-molded product. Similarly, the second semi-molded product is also integrally formed with a flange portion having a shape projecting outward from the periphery, and the flange parts of the first and second semi-molded products are superposed by a mold in the secondary molding. The first and second half-molded products are integrated with each other by injecting a molten resin into the cavity between the flange portions. The invention according to claim 4 is the primary molding according to claim 3, wherein the flange portion of the first semi-molded product is on the inner peripheral surface side and the flange portion of the second semi-molded product is on the outer peripheral surface side with a step of a predetermined depth. In the primary molding according to claim 3 or 4, the inner peripheral surface side of the flange portion of the second semi-molded product tapers outwardly in a taper shape. Molded to have parts.

【0005】[0005]

【実施例】初めに、図1により本実施例に係わる合成樹
脂製中空製品について説明する。合成樹脂製中空製品
は、本実施例によると、第1半成形品1と第2半成形品
10とから形成される。第1半成形品1は、底壁2と周
囲壁3、3、…とから容器部4を有するように成形され
ている。そして、周囲壁3、3、…が延長した形で、容
器部4から図において右方に突き出たフランジ部5、
5、…が一体的に成形されている。フランジ部5、5、
…の内周面は、段部を有するように2段に切り落とされ
ている。
EXAMPLE First, a hollow synthetic resin product according to this example will be described with reference to FIG. According to the present embodiment, the synthetic resin hollow product is formed from the first semi-molded product 1 and the second semi-molded product 10. The first semi-molded product 1 is molded so as to have a container portion 4 from a bottom wall 2 and peripheral walls 3, 3, .... The peripheral walls 3, 3, ... Are extended, and the flange portion 5 protruding rightward in the drawing from the container portion 4,
5, ... Are integrally molded. Flange parts 5, 5,
The inner peripheral surface of ... Is cut off in two steps so as to have a step portion.

【0006】第2半成形品10は、円板部あるいは平板
部11から概略蓋状に形成されている。そして平板部1
1の外周面から段部を有するように所定距離内側に入っ
た位置から、図1の(ロ)において右方に突出したフラ
ンジ部12、12、…が一体的に形成されている。第1
半成形品1のフランジ部5、5、…と第2半成形品10
のフランジ部12、12、…とを図1に示されているよ
うに重ねると、第1半成形品1のフランジ部5、5、…
の段部と、第2半成形品10のフランジ部12、12、
…の段部とによりフランジ部5、12、…間に後述する
ようにキャビティが形成される。そしてフランジ部5、
5、…の外周面とフランジ部12、12…の内周面とを
金型で保持した状態でキャビティに溶融樹脂Sが射出さ
れて、第1半成形品1と第2半成形品10は、フランジ
部5、12、…において一体化されている。
The second semi-molded product 10 is formed from a disk portion or a flat plate portion 11 in a substantially lid shape. And the flat plate part 1
1 is integrally formed with a flange portion 12, 12 ... Which protrudes to the right in FIG. 1B from a position inside by a predetermined distance so as to have a step from the outer peripheral surface of 1. First
The flange portions 5, 5, ... Of the semi-molded product 1 and the second semi-molded product 10
, And the flange portions 12, 12, ... Of the first semi-molded product 1 are overlapped as shown in FIG.
And the flange portions 12, 12 of the second semi-molded product 10,
A cavity is formed between the flange portions 5, 12, ... By the step portion of. And the flange portion 5,
The molten resin S is injected into the cavity while the outer peripheral surfaces of 5, ... And the inner peripheral surfaces of the flange portions 12, 12 are held by the mold, and the first semi-molded product 1 and the second semi-molded product 10 are , The flange portions 5, 12, ... Are integrated.

【0007】本実施例によると、第1半成形品1のフラ
ンジ部5、5、…は容器部4から、そして第2半成形品
10のフランジ部12、12、…は平板部11から、そ
れぞれ突き出た形で形成されているので、突き出たフラ
ンジ部5、12、…を金型で挟んで射出することができ
る。したがって、接合強度の大きい合成樹脂製中空製品
が得られる。なお、第2半成形品10は、平板状のもの
に限定されることなく、後述する図3にも示されている
ようにフランジ部12、12、…の内周面を金型で保持
するスペースが確保できれば、図1の(ロ)において1
点鎖線で示されているように内側に、または点線で示さ
れているように外側に椀状に膨んだものも同様に適用で
きることは明らかである。また、図1に示す実施例では
フランジ部5、12、…の先端面は、3層構造になって
露出しているが、この先端面を接合のために射出する樹
脂Sで覆って美観を向上させることもできる。さらに
は、図1には箱型の合成樹脂製中空製品が示されている
が、この形状に限定されることがなく、例えば筒状の合
成樹脂製中空製品でも実施できることは明らかである。
According to the present embodiment, the flange parts 5, 5, ... Of the first semi-molded product 1 are from the container part 4, and the flange parts 12, 12, ... Of the second semi-molded product 10 are from the flat plate part 11. Since each is formed in a protruding shape, the protruding flange portions 5, 12, ... Can be sandwiched between molds for injection. Therefore, a synthetic resin hollow product having high bonding strength can be obtained. The second semi-molded product 10 is not limited to a flat plate-shaped product, and the inner peripheral surfaces of the flange portions 12, 12, ... Are held by a mold as shown in FIG. 3 described later. If space can be secured, 1 in (b) of Fig. 1
Obviously, a bowl-shaped bulge inward as shown by a dotted line or outward as shown by a dotted line can be similarly applied. Further, in the embodiment shown in FIG. 1, the front end surfaces of the flange portions 5, 12, ... Have a three-layer structure and are exposed, but this front end surface is covered with a resin S that is injected for joining to give a beautiful appearance. It can also be improved. Furthermore, although a box-shaped synthetic resin hollow product is shown in FIG. 1, it is obvious that the present invention is not limited to this shape and can be carried out, for example, with a tubular synthetic resin hollow product.

【0008】次に、本発明の製造方法の実施例を説明す
る。本実施例では、合成樹脂製中空製品は、一次成形と
二次成形とにより製造される。すなわち一次成形におい
て容器部を有する第1半成形品と、平板部を有する第2
半成形品とが成形される。そして二次成形において、第
1半成形品と、第2半成形品が射出成形法により接合さ
れる。第1半成形品と、第2半成形品を形成する一次成
形方法およびその方法の実施に使用される金型は、図に
は示されていない。一次成形には、従来公知あるいは周
知の方法が適用できる。例えば本出願人が提案した特開
昭62ー87315号に記載されているような、固定型
と、この固定型に対して移動するスライド型と、このス
ライド型に型合わせされる可動型とを使用して、一対の
第1半成形品と、第2半成形品を成形することもでき
る。そして上記金型装置を使用すると、一次成形により
成形された第1半成形品をそのフランジ部が、第2半成
形品のフランジ部に突き合わせされるように、スライド
金型を可動型の方へ移動させて、二次成形をすることが
できる。また、一次成形により一対の金型で、一対の第
1半成形品と第2半成形品をそれぞれ形成し、二次成形
において第1半成形品と、第2半成形品のフランジ部が
突き合わせされるように、一対の金型を共に移動あるい
は回転させることもできる。
Next, an embodiment of the manufacturing method of the present invention will be described. In the present embodiment, the synthetic resin hollow product is manufactured by primary molding and secondary molding. That is, in the primary molding, a first semi-molded product having a container part and a second semi-molded product having a flat plate part.
A semi-molded product is molded. Then, in the secondary molding, the first semi-molded product and the second semi-molded product are joined by an injection molding method. The primary molding method for forming the first semi-molded article and the second semi-molded article and the mold used to carry out the method are not shown in the figures. A conventionally known or well-known method can be applied to the primary molding. For example, a fixed mold, a slide mold that moves relative to the fixed mold, and a movable mold that is matched with the slide mold, as described in JP-A-62-87315 proposed by the present applicant, are provided. It can also be used to form a pair of first and second semi-molded articles. Then, when the above-mentioned mold device is used, the slide mold is moved toward the movable mold so that the flange part of the first semi-molded product molded by the primary molding is abutted against the flange part of the second semi-molded product. It can be moved for secondary molding. In addition, a pair of first and second semi-molded products are respectively formed by a pair of dies by primary molding, and the flange portions of the first and second semi-molded products are butted against each other in the secondary molding. As described above, the pair of molds can be moved or rotated together.

【0009】以上のように、一次成形および二次成形に
使用される金型は、従来公知あるいは周知のものが適用
できるので、図2には、一次成形により成形された一対
の第1半成形品1と、第2半成形品10とが示されてい
る。また、図3には簡略された二次成形時の金型のみが
模式的に示され、型締装置、射出機等は図面には示され
ていない。
As described above, as the molds used for the primary molding and the secondary molding, conventionally known or well-known molds can be applied. Therefore, FIG. 2 shows a pair of first semi-molded molds formed by the primary molding. Item 1 and the second semi-molded item 10 are shown. Further, FIG. 3 schematically shows only a simplified mold for secondary molding, and the mold clamping device, the injection machine and the like are not shown in the drawing.

【0010】一次成形により成形される第1半成形品1
は、図2の(イ)に示されているように本実施例では右
端が開放した容器として成形されている。すなわち第1
半成形品1は、底壁2と周囲壁3とから容器部4を有す
るように成形されている。そして、周囲壁3が延長した
形で、容器部4から図において右方に突き出たフランジ
部5が一体的に成形されている。フランジ部5の内周面
は、段部6、7を有するように2段に切り落とされてい
る。
First semi-molded product 1 molded by primary molding
In the present embodiment, as shown in FIG. 2A, the container is molded as a container with the right end opened. Ie the first
The semi-molded product 1 is molded from a bottom wall 2 and a peripheral wall 3 to have a container portion 4. Then, the peripheral wall 3 is extended to integrally form a flange portion 5 protruding from the container portion 4 to the right in the drawing. The inner peripheral surface of the flange portion 5 is cut off in two steps so as to have the step portions 6 and 7.

【0011】第2半成形品10は、円板部あるいは平板
部11から概略蓋状に形成されている。そして平板部1
1の外周面から段部14を有するように所定距離内側に
入った位置から、図2の(ロ)において右方に突出した
筒状のフランジ部12が一体的に形成されている。第1
半成形品1のフランジ部5の段部7と、第2半成形品1
0のフランジ部12の段部14とによりフランジ部5、
12間に後述するようにキャビティ34が形成される。
The second semi-molded product 10 is formed from a disk portion or a flat plate portion 11 in a substantially lid shape. And the flat plate part 1
A cylindrical flange portion 12 that protrudes rightward in FIG. 2B is integrally formed from a position inside a predetermined distance so as to have a step portion 14 from the outer peripheral surface of 1. First
Step 7 of flange 5 of semi-molded product 1 and second semi-molded product 1
The flange portion 5 of the flange portion 0 of 0 and the step portion 14 of the flange portion 12,
A cavity 34 is formed between 12 as will be described later.

【0012】第1、2半成形品1、10を接合するため
の二次成形用の金型は、図3に示されているように一対
の金型20、30から構成されている。金型20には、
第1半成形品1の底壁2と周囲壁3およびフランジ部5
とが嵌るキャビテイ21が、また他方の金型30には、
第2半成形品10の平板部11とフランジ部12の内側
に嵌るコア31がそれぞれ形成されている。また、コア
31の周囲には、第1、2半成形品1、10のフランジ
部5、12の端面に対応して浅いキャビテイ34’が設
けられている。なお、金型30には、周知のロケートプ
レート32が取り付けられ、このロケートプレート32
からは第1、2半成形品1、10のフランジ部5、12
で形成されるキャビテイ34に連通したスプルー33が
形成されている。
The secondary molding die for joining the first and second half-molded products 1 and 10 is composed of a pair of dies 20 and 30 as shown in FIG. The mold 20 has
The bottom wall 2, the peripheral wall 3 and the flange portion 5 of the first semi-molded product 1
The cavity 21 to which is fitted and the other die 30 are
Cores 31 that fit inside the flat plate portion 11 and the flange portion 12 of the second semi-molded product 10 are formed, respectively. Further, a shallow cavity 34 'is provided around the core 31 so as to correspond to the end faces of the flange portions 5 and 12 of the first and second half-molded products 1 and 10. A well-known locate plate 32 is attached to the mold 30.
From the flange parts 5, 12 of the first and second half-molded products 1, 10.
The sprue 33 communicating with the cavity 34 formed in 1. is formed.

【0013】次に、上記金型20、30を使用して、第
1、2半成形品1、10を射出成形法により接合する例
について説明する。図3に示されているように、金型2
0のキャビテイ21に第1半成形品1をフランジ部5が
パーティング面側に位置するようにして装着する。同様
に、他方の金型30のコア31に第2半成形品10を装
着する。そして図に示されていない型締機を使用して、
型締めをする。そうすると、第1半成形品1の段部5に
第2半成形品10の平板部11の円周部が密着すると共
に、第1、2半成形品1、10のフランジ部5、12の
内側にキャビテイ34が形成される。フランジ部5、1
2の外表面は、金型20、30により支持される。
Next, an example in which the first and second half-molded products 1 and 10 are joined by the injection molding method using the molds 20 and 30 will be described. As shown in FIG. 3, the mold 2
The first semi-molded product 1 is mounted on the cavity 21 of 0 so that the flange portion 5 is located on the parting surface side. Similarly, the second semi-molded product 10 is mounted on the core 31 of the other mold 30. And using a mold clamping machine not shown in the figure,
Tighten the mold. Then, the circumferential portion of the flat plate portion 11 of the second semi-molded product 10 comes into close contact with the step portion 5 of the first semi-molded product 1, and the insides of the flange portions 5, 12 of the first and second semi-molded products 1, 10 are in contact with each other. A cavity 34 is formed in the. Flange parts 5, 1
The outer surface of 2 is supported by the molds 20 and 30.

【0014】次に、射出機から溶融樹脂を射出する。溶
融樹脂は周知のように射出シリンダからスプルー33等
を通ってキャビテイ34に射出される。そうすると、第
1、2半成形品1、10はフランジ部5、12において
接合される。冷却固化を待って従来周知のようにして金
型1、10を開き、合成樹脂製中空製品を取り出す。
Next, the molten resin is injected from the injection machine. As is well known, the molten resin is injected from the injection cylinder through the sprue 33 and the like into the cavity 34. Then, the first and second half-molded products 1 and 10 are joined at the flange portions 5 and 12. After cooling and solidification, the molds 1 and 10 are opened in a conventional manner to take out the hollow synthetic resin product.

【0015】本実施例によると色々な効果が得られる。
例えば、第1半成形品1のフランジ部5の外周面は、金
型20のキャビテイ21により、また第2半成形品10
のフランジ部12の内側は金型30のコア31により支
持されているので、高温の溶融樹脂を高圧でキャビテイ
34に射出しても、フランジ部5、12が変形するよう
なことはない。高温、高圧の溶融樹脂を射出できるの
で、接合強度の大きい合成樹脂製中空製品が得られる。
また、変形しないので、溶融樹脂が漏れるようなことも
なく、商品価値を損なうようなこともない。さらには、
本実施例によると、金型30のフランジ部5、12に対
応した位置には浅いキャビテイ34’が形成されている
ので、フランジ部5、12の端面は接合のために射出し
た樹脂により覆われ、端面の美観が向上する効果が得ら
れる。なお、図3中の符号33’はサイドゲートを示し
ているが、このゲートからも射出することができる。
According to this embodiment, various effects can be obtained.
For example, the outer peripheral surface of the flange portion 5 of the first semi-molded product 1 is formed by the cavity 21 of the mold 20, and the second semi-molded product 10
Since the inside of the flange portion 12 is supported by the core 31 of the mold 30, even if the high temperature molten resin is injected into the cavity 34 under high pressure, the flange portions 5 and 12 are not deformed. Since high-temperature and high-pressure molten resin can be injected, hollow products made of synthetic resin with high joint strength can be obtained.
Further, since it does not deform, the molten resin does not leak and the commercial value is not impaired. Furthermore,
According to this embodiment, since the shallow cavity 34 'is formed at a position corresponding to the flange portions 5 and 12 of the mold 30, the end faces of the flange portions 5 and 12 are covered with the injected resin for joining. The effect of improving the aesthetics of the end face is obtained. The reference numeral 33 'in FIG. 3 indicates a side gate, but the side gate can also be used for injection.

【0016】図4には、一次成形により成形される第1
半成形品と、第2半成形品の他の実施例が、組み合わさ
れた状態で、その一部が示されている。図2、3に関し
て説明した実施例と同様な要素には同じ参照数字にアル
フアベットの「a、bおよびc」を付けて重複説明はし
ないが、図4の(イ)に示されている実施例によると、
第1半成形品1aのフランジ部5aの内周面は、1段に
切り落とされていると共に、フランジ部5aには厚手方
向あるいは長手方向に向かって凹部が形成されている。
一方、第2半成形品10aのフランジ部12aの外周面
は平坦で、平板部11aの両面から両方向に突出した形
になっている。そしてフランジ部12aの内側は、順次
拡径したテーパ部13aとなっている。またフランジ部
12aの他方の端部はフランジ部5aの凹部に嵌るよう
になっている。このように形成されているフランジ部1
2aの外周面の径は、第1半成形品1aのフランジ部5
aの内径より小さい。これによりキャビテイ34aが形
成される。
FIG. 4 shows the first molded by the first molding.
Another embodiment of the semi-molded product and the second semi-molded product is shown in part in the combined state. Elements similar to those of the embodiment described with reference to FIGS. 2 and 3 will be given the same reference numerals with alphabet letters “a, b and c” to avoid duplicate description, but the implementation shown in FIG. According to the example,
The inner peripheral surface of the flange portion 5a of the first semi-molded product 1a is cut off in one step, and the flange portion 5a is formed with a recess in the thickness direction or the longitudinal direction.
On the other hand, the outer peripheral surface of the flange portion 12a of the second semi-molded product 10a is flat and protrudes in both directions from both sides of the flat plate portion 11a. The inside of the flange portion 12a is a tapered portion 13a whose diameter is gradually increased. The other end of the flange portion 12a is adapted to fit in the recess of the flange portion 5a. Flange portion 1 formed in this way
The diameter of the outer peripheral surface of 2a is the flange portion 5 of the first semi-molded product 1a.
It is smaller than the inner diameter of a. As a result, the cavity 34a is formed.

【0017】上記実施例においても、金型でフランジ部
5a、12aを保持して同様にキャビテイ34aに溶融
樹脂を射出すると、合成樹脂製中空製品が得られること
は明らかである。本実施例によると、第2半成形品10
aのフランジ部12aにはテーパ部13が形成されてい
るので、合成樹脂製中空製品が金型のコアから抜け易い
効果が得られる。なお、本実施例のキャビテイ34a
は、前述した実施例とは多少異なり、第2半成形品10
aのフランジ部12aの一部は、金型で支持されない形
状になっている。しかしながら、支持されていない部分
のキャビテイ34aの樹指圧は、平板部11aの肉厚方
向に作用するので、高温、高圧の溶融樹脂を射出して
も、フランジ部12aが変形するようなことはない。
Also in the above embodiment, it is apparent that a hollow product made of synthetic resin can be obtained by holding the flange portions 5a and 12a with a mold and injecting the molten resin into the cavity 34a in the same manner. According to this embodiment, the second semi-molded product 10
Since the taper portion 13 is formed on the flange portion 12a of "a", it is possible to obtain the effect that the hollow synthetic resin product can be easily removed from the core of the mold. In addition, the cavity 34a of the present embodiment
Is slightly different from the above-mentioned embodiment, and the second semi-molded product 10
A part of the flange portion 12a of a has a shape that is not supported by the mold. However, since the finger pressure of the cavity 34a in the unsupported portion acts in the thickness direction of the flat plate portion 11a, the flange portion 12a will not be deformed even if the high temperature and high pressure molten resin is injected. .

【0018】図4の(ロ)には、第1、2半成形品1
b、10bのフランジ部5b、12bの形状が簡単な実
施例が示されている。本実施例によると、第1半成形品
1bのフランジ部5bの内側は、キャビテイ34bを形
成するために、段部8bを有するように、単に所定深さ
に切り落とされている。また、第2半成形品10bのフ
ランジ部12bは、単に立ち上がっているだけである。
本実施例によると、一次成形用の金型が簡単になる効果
が得られる。なお、本実施例によっても射出樹指圧を高
くすることができるので、充分な接合強度は得られる。
FIG. 4B shows the first and second half-molded products 1
An example is shown in which the shape of the flange portions 5b and 12b of b and 10b is simple. According to this embodiment, the inside of the flange portion 5b of the first semi-molded product 1b is simply cut to a predetermined depth so as to have the step portion 8b in order to form the cavity 34b. Further, the flange portion 12b of the second semi-molded product 10b merely stands up.
According to this embodiment, the effect of simplifying the die for primary molding can be obtained. It should be noted that, also in this embodiment, the injection tree finger pressure can be increased, so that sufficient bonding strength can be obtained.

【0019】図4の(ハ)に示されている実施例では、
第1半成形品1cのフランジ部5cは内周面が、そして
第2半成形品10cのフランジ部12cは外周面がテー
パ状に切り欠かれている。これにより断面が三角形のキ
ャビティ34cが形成されている。前述した実施例によ
ると、いずれもキャビティ34、34a、34bの樹指
圧の一部は、第1半成形品1cの周囲壁3、3a、3b
の肉厚方向あるいは長手方向にも作用するが、本実施例
によると、樹指圧はテーパ面に作用し、第1半成形品1
cの周囲壁3cには殆ど作用しない効果が得られる。
In the embodiment shown in FIG. 4C,
The flange portion 5c of the first semi-molded product 1c has a tapered inner peripheral surface, and the flange portion 12c of the second semi-molded product 10c has a tapered outer peripheral surface. As a result, a cavity 34c having a triangular cross section is formed. According to the above-described embodiments, a part of the tree finger pressure in each of the cavities 34, 34a, 34b is caused by the peripheral walls 3, 3a, 3b of the first semi-molded product 1c.
According to the present embodiment, the tree finger pressure acts on the taper surface, and the first semi-molded product 1
The effect that it hardly acts on the peripheral wall 3c of c is obtained.

【0020】[0020]

【発明の効果】以上のように、本発明による合成樹脂製
中空製品は、第1半成形品と、第2半成形品とが接合さ
れて形成されているが、第1半成形品と第2半成形品
は、第1半成形品の容器部から外方に突出した形のフラ
ンジ部と、第2半成形品の周囲から外方に突出した形の
フランジ部とが一体化されるように構成されているの
で、射出成形により接合するとき両フランジ部を金型で
支持して高温、高圧の溶融樹脂を射出することができ
る。したがって、本発明による合成樹脂製中空製品の接
合部の強度は大きい。また、請求項2記載の発明による
と、第1半成形品と第2半成形品のフランジ部の先端面
部は、接合した射出樹脂により覆われているので、接合
面が広くなって接合強度がさらに大きくなっていると共
に、接合部の美観も良くなっている。請求項3記載の製
造方法の発明によると、一次成形において、第1半成形
品には、容器部から外方に突出した形のフランジ部を一
体形成すると共に、第2半成形品にも同様に周囲から外
方に突出した形のフランジ部を一体形成し、そして二次
成形において、第1、2半成形品のフランジ部の間に溶
融樹脂を射出して接合一体化するとき、第1、2半成形
品のフランジ部を金型により重ね合わせた状態に保持す
るので、高温、高圧の溶融樹脂を射出することができ
る。したがって、接合部の強度の大きい合成樹脂製中空
製品を得ることができる。また、第1、2半成形品のフ
ランジ部を金型により重ね合わせた状態に保持して射出
するので、フランジ部が変形するようなことも、樹脂漏
れを起こすようなこともない。さらには、高い圧力で射
出することができるので、充填距離が長くなり、ゲート
数が少なくても充填できる。したがって、金型が簡単に
なる効果も得られる。請求項4記載の発明によると、一
次成形において、第1半成形品のフランジ部は内周面側
に、そして第2半成形品のフランジ部は外周面側に所定
深さの段部を有するように成形するので、二次成形時に
射出するキャビティの表面積は、第1、2半成形品に等
しく分配されることになる。すなわち第1、2半成形品
の接合表面積が等しくなる。したがって、請求項2記載
に発明の効果に加えて接合強度が均一になる効果が得ら
れる。請求項5記載の発明によると、一次成形において
第2半成形品のフランジ部の内周面側は外方に向かって
テーパ状に広がるテーパ部を有するように成形するの
で、二次成形により接合される成樹脂製中空製品が金型
から抜け易い効果が付加される。
As described above, the hollow synthetic resin product according to the present invention is formed by joining the first semi-molded product and the second semi-molded product. In the second half-molded product, the flange portion protruding outward from the container portion of the first semi-molded product and the flange portion protruding outward from the periphery of the second semi-molded product are integrated. Therefore, when joining by injection molding, both flanges can be supported by a mold to inject high-temperature, high-pressure molten resin. Therefore, the strength of the joint portion of the synthetic resin hollow product according to the present invention is high. Further, according to the invention of claim 2, since the tip end surface portions of the flange portions of the first semi-molded product and the second semi-molded product are covered with the joined injection resin, the joint surface is widened and the joint strength is increased. It is getting bigger and the aesthetics of the joint is getting better. According to the invention of the manufacturing method as set forth in claim 3, in the primary molding, the first semi-molded product is integrally formed with the flange part projecting outward from the container part, and the same is applied to the second semi-molded product. A flange portion outwardly protruding from the surroundings is integrally formed, and in the secondary molding, when a molten resin is injected between the flange portions of the first and second half-molded products to be joined and integrated, Since the flange portions of the two-half molded products are held in a state of being overlapped with each other by the mold, the high temperature and high pressure molten resin can be injected. Therefore, it is possible to obtain a synthetic resin hollow product having a large strength at the joint portion. Further, since the flange portions of the first and second half-molded products are held in a state of being overlapped with each other by the mold and injected, the flange portion is not deformed and the resin does not leak. Furthermore, since the injection can be performed at a high pressure, the filling distance becomes long and the filling can be performed even if the number of gates is small. Therefore, the effect of simplifying the mold is also obtained. According to the invention of claim 4, in the primary molding, the flange portion of the first semi-molded product has a step portion on the inner peripheral surface side, and the flange portion of the second semi-molded product has a step portion of a predetermined depth on the outer peripheral surface side. Thus, the surface area of the cavity injected during the secondary molding is evenly distributed to the first and second half-molded products. That is, the bonding surface areas of the first and second half-molded products become equal. Therefore, in addition to the effect of the invention described in claim 2, the effect that the bonding strength becomes uniform can be obtained. According to the invention of claim 5, in the primary molding, since the inner peripheral surface side of the flange portion of the second semi-molded product is molded so as to have a taper portion that expands outward in a tapered shape, it is joined by the secondary molding. The effect that the synthetic resin hollow product is easily removed from the mold is added.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係わる成樹脂製中空製品の実施例を示
す図で、その(イ)は一部を断面にして示す斜視図、そ
して(ロ)はその一部を断面にして示す側面図である。
FIG. 1 is a view showing an embodiment of a synthetic resin hollow product according to the present invention, in which (a) is a perspective view showing a part of the cross section, and (b) is a side view showing a part of the cross section. It is a figure.

【図2】本発明の、一次成形により成形される第1、2
半成形品の例を示す図で、その(イ)は第1半成形品
を、そして(ロ)は第2半成形品の例を模式的に示す断
面図である。
FIG. 2 is the first and the second molded by the primary molding of the present invention.
It is a figure which shows the example of a semi-molded product, (a) is a 1st semi-molded product, and (b) is sectional drawing which shows the example of a 2nd semi-molded product typically.

【図3】図1に示す第1、2半成形品を二次成形する状
態を模式的に示す断面図である。
FIG. 3 is a cross-sectional view schematically showing a state in which the first and second half-molded products shown in FIG. 1 are secondarily molded.

【図4】一次成形により成形される第1、2半成形品の
色々異なる他の例の一部を模式的に示す断面図である。
FIG. 4 is a cross-sectional view schematically showing a part of another example in which the first and second half-molded products formed by primary molding are different from each other.

【図5】従来の合成樹脂製中空製品の製造方法を示す断
面図である。
FIG. 5 is a cross-sectional view showing a conventional method of manufacturing a synthetic resin hollow product.

【符号の説明】[Explanation of symbols]

1 第1半成形品 4 容器部 5 フランジ部 10 第2半成形品 11、11a、b、c 平板部 12、12a、b、c フランジ部 13a テーパ部 20、30 金型 34、34a、b、c キャビティ 1 1st semi-molded product 4 Container part 5 Flange part 10 2nd semi-molded product 11, 11a, b, c Flat plate part 12, 12a, b, c Flange part 13a Tapered part 20, 30 Mold 34, 34a, b, c cavity

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 第1半成形品(1)と、第2半成形品
(10)とが接合された合成樹脂製中空製品であって、 前記第1半成形品(1)と第2半成形品(10)は、前
記第1半成形品(1)の容器部(4)から外方に突出し
た形のフランジ部(5)と、前記第2半成形品(10)
の周囲から外方に突出した形のフランジ部(12)とが
射出成形により接合一体化されている射出成形法による
合成樹脂製中空製品。
1. A hollow synthetic resin product in which a first semi-molded product (1) and a second semi-molded product (10) are joined together, wherein the first semi-molded product (1) and the second semi-molded product The molded product (10) includes a flange portion (5) projecting outward from the container portion (4) of the first semi-molded product (1) and the second semi-molded product (10).
A hollow product made of synthetic resin by an injection molding method in which a flange portion (12) having a shape protruding outward from the periphery is joined and integrated by injection molding.
【請求項2】 請求項1記載のフランジ部(5、12)
の先端面部は、接合のために射出した樹脂により覆われ
ている射出成形法による合成樹脂製中空製品。
2. The flange portion (5, 12) according to claim 1.
The end surface of is a synthetic resin hollow product manufactured by injection molding in which the resin injected for joining is covered.
【請求項3】 一次成形において第1半成形品(1)
と、第2半成形品(10)とを成形し、二次成形におい
て前記第1半成形品(1)と第2半成形品(10)とを
射出成形法により一体化して中空製品を製造する合成樹
脂製中空製品の製造方法であって、 前記一次成形において、前記第1半成形品(1)には容
器部(4)から外方に突出した形のフランジ部(5)を
一体形成すると共に、前記第2半成形品(10)にも同
様に周囲から外方に突出した形のフランジ部(12)を
一体形成し、前記二次成形において、前記第1、2半成
形品(1、10)のフランジ部(5、12)を金型(2
0、30)により重ね合わせた状態に保持し、そして前
記フランジ部(5、12)の間のキャビティ(34)に
溶融樹脂を射出して、前記第1、2半成形品(1、1
0)を一体化する、射出成形法による合成樹脂製中空製
品の製造方法。
3. A first semi-molded product (1) in the primary molding.
And a second semi-molded product (10) are molded, and in the second molding, the first semi-molded product (1) and the second semi-molded product (10) are integrated by an injection molding method to manufacture a hollow product. A method of manufacturing a hollow product made of synthetic resin according to claim 1, wherein in the primary molding, a flange portion (5) protruding outward from a container portion (4) is integrally formed on the first semi-molded product (1). At the same time, the second semi-molded product (10) is also integrally formed with a flange portion (12) having a shape protruding outward from the periphery, and in the secondary molding, the first and second semi-molded products ( The flange parts (5, 12) of
0, 30) to hold them in a superposed state, and inject the molten resin into the cavity (34) between the flange portions (5, 12) to thereby produce the first and second half-molded products (1, 1).
0) is integrated with a synthetic resin hollow product by an injection molding method.
【請求項4】 請求項3記載の一次成形において、第1
半成形品(1)のフランジ部(5)は内周面側に、そし
て第2半成形品(10)のフランジ部(12)は外周面
側に所定深さの段部(6、7、14)を有するように成
形する、射出成形法による合成樹脂製中空製品の製造方
法。
4. The primary molding according to claim 3, wherein
The flange portion (5) of the semi-molded product (1) is on the inner peripheral surface side, and the flange portion (12) of the second semi-molded product (10) is on the outer peripheral surface side, and a stepped portion (6, 7, 14) A method for producing a synthetic resin hollow product by an injection molding method, the method including molding the hollow product.
【請求項5】 請求項3または4記載の一次成形におい
て、第2半成形品(10)のフランジ部(12)の内周
面側は外方に向かってテーパ状に広がるテーパ部(13
a)を有するように成形する、射出成形法による合成樹
脂製中空製品の製造方法。
5. The primary molding according to claim 3 or 4, wherein the inner peripheral surface side of the flange portion (12) of the second semi-molded product (10) tapers outwardly.
A method for producing a hollow product made of synthetic resin by an injection molding method, which comprises molding to have a).
JP6337594A 1994-12-28 1994-12-28 Hollow product made of synthetic resin by injection molding method and method for producing the same Expired - Fee Related JP3012914B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6337594A JP3012914B2 (en) 1994-12-28 1994-12-28 Hollow product made of synthetic resin by injection molding method and method for producing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6337594A JP3012914B2 (en) 1994-12-28 1994-12-28 Hollow product made of synthetic resin by injection molding method and method for producing the same

Publications (2)

Publication Number Publication Date
JPH08183061A true JPH08183061A (en) 1996-07-16
JP3012914B2 JP3012914B2 (en) 2000-02-28

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ID=18310124

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Application Number Title Priority Date Filing Date
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Country Link
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0950503A1 (en) * 1998-03-27 1999-10-20 Siegfried Hofmann GmbH Method for making thermoplastic hollow bodies
JP2002046141A (en) * 2000-05-26 2002-02-12 Oshima Denki Seisakusho:Kk Injection molding body
JP2007106125A (en) * 2006-11-21 2007-04-26 Oshima Denki Seisakusho:Kk Die for manufacturing hollow molded article
JP2008064443A (en) * 2006-08-08 2008-03-21 Sharp Corp Manufacturing method for water storage tank, and water storage tank
JP2008296457A (en) * 2007-05-31 2008-12-11 Yoshino Kogyosho Co Ltd Capped cylindrical synthetic resin molding having double wall and its manufacturing process
JP2009107300A (en) * 2007-10-31 2009-05-21 Yoshino Kogyosho Co Ltd Topped cylindrical synthetic resin molded article having double wall
US8388114B2 (en) 2009-01-07 2013-03-05 Canon Kabushiki Kaisha Liquid jet recording head and manufacturing method thereof

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0950503A1 (en) * 1998-03-27 1999-10-20 Siegfried Hofmann GmbH Method for making thermoplastic hollow bodies
JP2002046141A (en) * 2000-05-26 2002-02-12 Oshima Denki Seisakusho:Kk Injection molding body
JP4587426B2 (en) * 2000-05-26 2010-11-24 株式会社ミツバ Hollow injection molded body
JP2008064443A (en) * 2006-08-08 2008-03-21 Sharp Corp Manufacturing method for water storage tank, and water storage tank
JP2007106125A (en) * 2006-11-21 2007-04-26 Oshima Denki Seisakusho:Kk Die for manufacturing hollow molded article
JP4559402B2 (en) * 2006-11-21 2010-10-06 株式会社ミツバ Mold for manufacturing hollow molded body
JP2008296457A (en) * 2007-05-31 2008-12-11 Yoshino Kogyosho Co Ltd Capped cylindrical synthetic resin molding having double wall and its manufacturing process
JP2009107300A (en) * 2007-10-31 2009-05-21 Yoshino Kogyosho Co Ltd Topped cylindrical synthetic resin molded article having double wall
US8388114B2 (en) 2009-01-07 2013-03-05 Canon Kabushiki Kaisha Liquid jet recording head and manufacturing method thereof

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