JPS6152780B2 - - Google Patents
Info
- Publication number
- JPS6152780B2 JPS6152780B2 JP155681A JP155681A JPS6152780B2 JP S6152780 B2 JPS6152780 B2 JP S6152780B2 JP 155681 A JP155681 A JP 155681A JP 155681 A JP155681 A JP 155681A JP S6152780 B2 JPS6152780 B2 JP S6152780B2
- Authority
- JP
- Japan
- Prior art keywords
- mold cavity
- plastic
- thick
- mold
- filled
- 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
- 229920003023 plastic Polymers 0.000 claims description 20
- 239000004033 plastic Substances 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000010137 moulding (plastic) Methods 0.000 claims 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
- B29C45/561—Injection-compression moulding
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/57—Exerting after-pressure on the moulding material
- B29C45/572—Exerting after-pressure on the moulding material using movable mould wall or runner parts
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
- B29C45/561—Injection-compression moulding
- B29C2045/5635—Mould integrated compression drive means
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
- B29C45/561—Injection-compression moulding
- B29C2045/5665—Compression by transversely movable mould parts
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は厚肉プラスチツク成形方法およびその
金型に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for molding thick-walled plastics and a mold thereof.
従来より厚肉プラスチツク製品を成形する場
合、金型キヤビテイ内への溶融プラスチツクの充
填後の冷却は金型温度を高く保ち、長い時間をか
けて徐々に冷却をする方法が行われている。これ
は急激に金型温度を低下させると成形品が厚肉の
ため気泡やヒゲが発生し易くなるためである。 Conventionally, when molding thick-walled plastic products, cooling after filling the mold cavity with molten plastic has been carried out by keeping the mold temperature high and cooling gradually over a long period of time. This is because if the mold temperature is suddenly lowered, air bubbles and whiskers are likely to occur because the molded product is thick.
依つて、従来方法では金型温度を低下させるた
めの時間が掛り、成形サイクルが長く生産性が悪
いという欠点があつた。 Therefore, the conventional method has disadvantages in that it takes time to lower the mold temperature, the molding cycle is long, and productivity is poor.
本発明はこのような事情に鑑み成されたもので
前述のような従来からの欠点を取除き、金型温度
を園く保ち、しかも気泡やヒゲが発生しないよう
な厚肉プラスチツクの成形方法およびその金型を
提供するものである。 The present invention has been made in view of the above circumstances, and provides a method for molding thick-walled plastic that eliminates the conventional drawbacks as described above, maintains a moderate mold temperature, and does not generate air bubbles or whiskers. The mold will be provided.
次に本発明の１実施例第１図に基き説明する
と、１１は固定金型、１２は移動金型で前記固定
金型１１に対し進退し、両金型１１および１２が
接合したとき金型キヤビテイ１３を形成するよう
になつている。 Next, one embodiment of the present invention will be explained based on FIG. 1. Reference numeral 11 is a fixed mold, 12 is a movable mold, which moves forward and backward with respect to the fixed mold 11, and when both molds 11 and 12 are joined, the mold A cavity 13 is formed.
前記金型キヤビテイ１３は注入口１４およびゲ
ート１５の間を連絡するスプル１６から図示して
ない射出ノズルから射出される溶融プラスチツク
が導入されるようになつている。１７はスライド
部で、保圧又は冷却中に金型キヤビテイ１３内に
充填されたプラスチツクの冷却固化に伴う体積収
縮に合せて前記充填プラスチツクを押圧するもの
で、内部にカートリツジヒータ等の加熱装置１８
を設けてあり、充填プラスチツクが急冷しないよ
うになつている。１９は前記スライド部１７を動
かす押圧機構で空圧や油圧シリンダ等を作動させ
前記スライド部１７が金型キヤビテイ１３の体積
を縮めるようにしている。２０は前記スプル１６
を開閉する注入口閉塞機構で、溶融プラスチツク
充填後の保圧又は冷却中の前記スライド部１７に
よる押圧の際金型キヤビテイ１３からゲート１５
に接する射出ノズル側への溶融プラスチツクの逆
流を防止するため前記スプル１６を閉塞するよう
になつている。 Molten plastic is introduced into the mold cavity 13 through a sprue 16 communicating between an injection port 14 and a gate 15, which is injected from an injection nozzle (not shown). Reference numeral 17 denotes a slide section which presses the filled plastic in accordance with the volumetric shrinkage of the plastic filled in the mold cavity 13 as it cools and solidifies during pressure holding or cooling, and is equipped with a heating device such as a cartridge heater inside. 18
is provided to prevent the filled plastic from cooling too quickly. Reference numeral 19 denotes a pressing mechanism for moving the slide section 17, which operates a pneumatic or hydraulic cylinder or the like so that the slide section 17 contracts the volume of the mold cavity 13. 20 is the sprue 16
An injection port closing mechanism that opens and closes the mold cavity 13 to the gate 15 when pressed by the slide portion 17 during pressure retention or cooling after filling with molten plastic.
The sprue 16 is closed to prevent backflow of molten plastic to the injection nozzle side that is in contact with the sprue 16.
以上説明したような構成となつており、金型１
１および１２が低い温度に保たれていても、充填
プラスチツクの冷却固化による体積の収縮をスラ
イド部１７が金型キヤビテイ１７内で押込まれる
ので、気泡とかヒゲが入りにくく、しかも金型温
度が低いので、成形サイクルが短縮され、当初に
掲げたような欠点が取除かれる。 The structure is as explained above, and the mold 1
Even if parts 1 and 12 are kept at a low temperature, the slide part 17 is pushed into the mold cavity 17 to absorb the shrinkage of the volume due to cooling and solidification of the filled plastic, which prevents air bubbles and whiskers from entering, and also keeps the mold temperature low. This reduces the molding cycle and eliminates the drawbacks listed above.
第１図は本発明による１実施例を示す図。
１１……固定金型、１２……移動金型、１３…
…金型キヤビテイ、１７……スライド部、１９…
…スライド部押圧機構、２０……注入口閉塞機
構。
FIG. 1 is a diagram showing one embodiment according to the present invention. 11... fixed mold, 12... movable mold, 13...
...Mold cavity, 17...Slide part, 19...
...Sliding portion pressing mechanism, 20...Inlet closing mechanism.
Claims (1)
填完了後の保圧あるいは冷却工程中に前記充填プ
ラスチツクの厚肉部が接する金型キヤビテイ面の
一部を加熱しつつ押圧し、保圧あるいは冷却の進
行とともに前記加熱部の減温を行うことを特徴と
した厚肉プラスチツク成形方法。 ２ 内部に加熱用ヒータを備え、金型キヤビテイ
に充填されたプラスチツクの厚肉部と接し、同金
型キヤビテイの一部を構成するスライド部と、充
填されたプラスチツクの冷却固化に伴う体積の収
縮に合せ前記スライド部を金型キヤビテイ内へ押
圧する押圧機構と、溶融プラスチツク射出用ノズ
ルと金型キヤビテイの注入口を連絡するスプルの
中途にあり、保圧又は冷却工程中の金型キヤビテ
イ内の充填プラスチツクの押圧に際し、金型キヤ
ビテイ内からのノズル側への逆流を防止するため
前記スプルを塞ぐようにされた注入口閉塞機構と
から成り、溶融プラスチツクの金型キヤビテイ内
への充填完了後の保圧あるいは冷却工程中に前記
充填プラスチツクの厚肉部が接する金型キヤビテ
イ面の一部を加熱しつつ押圧し、保圧あるいは冷
却の進行とともに前記加熱部の減温を行うプラス
チツク成形方法を実施するための厚肉プラスチツ
ク成形用金型。[Scope of Claims] 1. During the pressure holding or cooling process after filling of the molten plastic into the mold cavity is completed, a part of the mold cavity surface that is in contact with the thick part of the filled plastic is heated and pressed; A method for molding thick-walled plastics, characterized in that the temperature of the heating section is reduced as pressure holding or cooling progresses. 2. A sliding part that is equipped with an internal heating heater, contacts the thick part of the plastic filled in the mold cavity, and forms part of the mold cavity, and shrinks in volume as the filled plastic cools and solidifies. There is a pressing mechanism that presses the slide part into the mold cavity according to the pressure, and a sprue that connects the molten plastic injection nozzle and the injection port of the mold cavity. and an inlet closing mechanism configured to block the sprue to prevent backflow from the inside of the mold cavity to the nozzle side when pressing the filled plastic, and after the filling of the molten plastic into the mold cavity is completed. A plastic molding method is implemented in which a part of the mold cavity surface in contact with the thick part of the filled plastic is heated and pressed during the pressure holding or cooling process, and the temperature of the heated part is reduced as the pressure holding or cooling progresses. Mold for thick-walled plastic molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP155681A JPS57115330A (en) | 1981-01-08 | 1981-01-08 | Forming process for thick plastic products and its metal mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP155681A JPS57115330A (en) | 1981-01-08 | 1981-01-08 | Forming process for thick plastic products and its metal mold |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP64000240A Division JPH01246232A (en) | 1980-02-05 | 1989-01-04 | Benzotrifluoride compound and its production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57115330A JPS57115330A (en) | 1982-07-17 |
| JPS6152780B2 true JPS6152780B2 (en) | 1986-11-14 |
Family
ID=11504794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP155681A Granted JPS57115330A (en) | 1981-01-08 | 1981-01-08 | Forming process for thick plastic products and its metal mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57115330A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4470970A (en) * | 1981-07-02 | 1984-09-11 | Burzynski Stanislaw R | Purified antineoplaston fractions and methods of treating neoplastic disease |
| JPS5812738A (en) * | 1981-07-16 | 1983-01-24 | Matsushita Electric Ind Co Ltd | Heat cycle injection compression molding method |
| JPS6089322A (en) * | 1983-10-21 | 1985-05-20 | Asahi Glass Co Ltd | Reactive injection molding process and its device |
| JPH0428733Y2 (en) * | 1985-07-11 | 1992-07-13 | ||
| JPS6228516U (en) * | 1985-07-31 | 1987-02-20 | ||
| JPS6255419U (en) * | 1985-09-27 | 1987-04-06 | ||
| JPS63209915A (en) * | 1987-02-27 | 1988-08-31 | Sony Corp | Resin molding equipment |
| JPH0620799B2 (en) * | 1987-07-15 | 1994-03-23 | 平河ヒューテック株式会社 | Injection molding equipment |
| JP2589397B2 (en) * | 1990-04-02 | 1997-03-12 | 株式会社クボタ | Injection molding apparatus and injection molding method |
| NL1021838C2 (en) * | 2002-11-05 | 2004-05-07 | Fountain Patents B V | Device and method for manufacturing containers. |
-
1981
- 1981-01-08 JP JP155681A patent/JPS57115330A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57115330A (en) | 1982-07-17 |
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