JPH0414864B2 - - Google Patents
Info
- Publication number
- JPH0414864B2 JPH0414864B2 JP18107086A JP18107086A JPH0414864B2 JP H0414864 B2 JPH0414864 B2 JP H0414864B2 JP 18107086 A JP18107086 A JP 18107086A JP 18107086 A JP18107086 A JP 18107086A JP H0414864 B2 JPH0414864 B2 JP H0414864B2
- Authority
- JP
- Japan
- Prior art keywords
- heating cylinder
- cylinder
- reinforced
- heating
- heating element
- 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
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
- B29C45/74—Heating or cooling of the injection unit
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、特殊な形状の加熱シリンダを有す
る射出成形機に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to an injection molding machine having a specially shaped heating cylinder.
従来射出成形機の加熱シリンダは、射出時の高
圧に対する強度上の理由から加熱シリンダ全体の
肉厚を厚くしていた。
Conventionally, the heating cylinder of an injection molding machine has been made thick as a whole in order to provide strength against high pressure during injection.
しかし加熱シリンダの圧力の加わる部分は先端
部のみであり、その他の加熱シリンダの部分は熱
的特性を考えると薄肉であることが望しく、従来
のシリンダではこのような熱的設計がなされてい
ないために加熱シリンダ内部での発熱を精度良く
短時間に補償することが困難であつた。
However, the pressure applied part of the heating cylinder is only at the tip, and other parts of the heating cylinder should preferably be thin in terms of thermal characteristics, and conventional cylinders do not have such a thermal design. Therefore, it has been difficult to compensate for the heat generated inside the heating cylinder with high accuracy and in a short period of time.
この発明は前述した事情に鑑み創案されたもの
で、その目的は加熱シリンダ内部での発熱を精度
良く短時間で制御することのできる射出成形機を
提供することにある。 This invention was devised in view of the above-mentioned circumstances, and its purpose is to provide an injection molding machine that can accurately control heat generation inside a heating cylinder in a short time.
この発明によれば加熱シリンダの内面を窒化鉄
材で補強すると共に、該加熱シリンダの内壁面近
傍に抵抗体発熱体を設け、その射出側先端部にお
いて補強用構造体で補強して金型側支持台へ取付
け支持したことを特徴とするものである。
According to this invention, the inner surface of the heating cylinder is reinforced with an iron nitride material, and a resistor heating element is provided near the inner wall surface of the heating cylinder, and its injection side tip is reinforced with a reinforcing structure to support the mold side. It is characterized by being mounted and supported on a stand.
そして射出時に最大圧力が加わる先端部を補強
すると共に、内面を窒化鉄材で補強することで耐
圧性を補償する。 The tip, where the maximum pressure is applied during injection, is reinforced, and the inner surface is reinforced with iron nitride to ensure pressure resistance.
また薄肉にして抵抗発熱体を設けたことによつ
て、樹脂内部に発生した摩擦熱が過剰の場合は薄
いシリンダ層を通して放熱できるから、逆に不足
している場合は発熱体から補えば良いことから温
度制御を精度よく短時間で行えるようにしたもの
である。 In addition, by making the wall thinner and installing a resistance heating element, if the frictional heat generated inside the resin is excessive, it can be dissipated through the thin cylinder layer.On the other hand, if it is insufficient, it can be supplemented from the heating element. This allows temperature control to be performed accurately and in a short time.
以下この発明の射出成形機を図示する実施例に
よつて説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The injection molding machine of the present invention will be described below with reference to illustrative embodiments.
加熱シリンダ１は、内面が窒化鉄材２で補強さ
れていると共に、内壁面近傍に抵抗発熱体３が設
けられて薄肉に形成されており、射出側先端部に
おいて補強用構造体４で補強して金型５側の支持
台６へ取付け支持されてなつている。（第１図参
照）なおこここで符号７は射出用スクリユー、８
は樹脂供給用ホツパである。 The heating cylinder 1 has an inner surface reinforced with an iron nitride material 2, a resistance heating element 3 provided near the inner wall surface, and a thin wall, and a reinforcing structure 4 reinforced at the tip on the injection side. It is attached and supported by a support stand 6 on the mold 5 side. (See Figure 1) Here, the reference numeral 7 is the injection screw, and 8
is a resin supply hopper.
加熱シリンダ１は、直接発熱体３を設置できる
ようにセラミツク等の電気的絶縁材で製作されて
いる。そして内面に内方へ開口しており、抵抗発
熱体３が設置される溝９が複数形成されていると
共に、この溝９を塞ぐように内面窒化鉄材２が設
けられている。 The heating cylinder 1 is made of an electrically insulating material such as ceramic so that the heating element 3 can be directly installed. A plurality of grooves 9 are formed on the inner surface and open inward, and in which the resistance heating elements 3 are installed, and an inner surface iron nitride material 2 is provided so as to close the grooves 9.
なお窒化された鉄の筒を挿入することにより、
従来通りなめらかな可塑化ができるようになつて
いる。 By inserting a nitrided iron tube,
Smooth plasticization is now possible as before.
また加熱シリンダ１の先端部は、射出時に高圧
が加わるので、第３図に示す補強用構造体４を金
型支持台６に取付けておき、その中に薄肉の加熱
シリンダ１を第１図で示したように挿入されてな
つている。 Furthermore, since high pressure is applied to the tip of the heating cylinder 1 during injection, the reinforcing structure 4 shown in FIG. It is inserted and shaped as shown.
このような構成からなる加熱シリンダ１であれ
ば、加熱シリンダ１の発熱体３に供給する電力を
制御することによつてシリンダ内部の樹脂の可塑
化プロセスを制御する時は、樹脂内部に発生した
摩擦熱が過剰の場合は薄いシリンダ層を通して放
熱し、逆に不足している場合は発熱体から補うこ
とができる。 With the heating cylinder 1 having such a configuration, when controlling the plasticization process of the resin inside the cylinder by controlling the electric power supplied to the heating element 3 of the heating cylinder 1, it is possible to control the plasticization process of the resin inside the cylinder. If there is an excess of frictional heat, it is radiated through the thin cylinder layer, and if it is insufficient, it can be supplemented by the heating element.
そしてこれらの温度制御補償は、従来の厚肉シ
リンダに比べ熱的おくれが少ないため、精度良く
短時間で行える。 These temperature control compensations can be performed accurately and in a short time because there is less thermal lag than in conventional thick-walled cylinders.
なお補強用構造体４が取付けられている部分は
肉厚が厚いが、非干渉制御方式を採用することで
精度の高い温度制御を実現することができる。 Although the portion where the reinforcing structure 4 is attached is thick, highly accurate temperature control can be achieved by adopting a non-interference control method.
この発明の射出成形機によれば加熱シリンダを
薄肉に形成し、内壁面近傍に抵抗発熱体を設けた
ことにより、発熱体による加熱と、薄肉シリンダ
からの放熱を短時間で行える。
According to the injection molding machine of the present invention, the heating cylinder is formed thin and the resistance heating element is provided near the inner wall surface, so that heating by the heating element and heat dissipation from the thin cylinder can be performed in a short time.
そのため樹脂の温度制御補償を、従来の厚肉シ
リンダに比べ熱的おくれが少ないため、精度よく
短時間で行える。 Therefore, temperature control compensation for the resin can be performed accurately and in a short time because there is less thermal lag compared to conventional thick-walled cylinders.
また樹脂が流れる内面に窒化鉄材を設けたこと
により、従来通りなめらかな可塑化が行える。 Furthermore, by providing an iron nitride material on the inner surface through which the resin flows, smooth plasticization can be achieved as before.
さらに加熱シリンダの先端部は補強用構造体で
支持しているため、耐圧性も補償される。 Furthermore, since the tip of the heating cylinder is supported by a reinforcing structure, pressure resistance is also compensated.
第１図はこの発明の射出成形機における加熱シ
リンダの部分を示す概略断面図、第２図は第１図
のＡ部拡大断面図、第３図は補強用構造体の部分
を示すＢ部拡大断面図である。
１…加熱シリンダ、２…窒化鉄材、３…抵抗発
熱体、４…補強用構造体、５…金型、６…支持
台、７…スクリユー、８…ホツパ、９…溝。
Fig. 1 is a schematic sectional view showing the heating cylinder part of the injection molding machine of the present invention, Fig. 2 is an enlarged sectional view of part A in Fig. 1, and Fig. 3 is an enlarged part B showing the reinforcing structure part. FIG. DESCRIPTION OF SYMBOLS 1... Heating cylinder, 2... Iron nitride material, 3... Resistance heating element, 4... Reinforcing structure, 5... Mold, 6... Support stand, 7... Screw, 8... Hopper, 9... Groove.
Claims (1)
いると共に、該加熱シリンダの内壁面近傍に抵抗
発熱体を設けて、薄肉に形成しており、その射出
側先端部において補強用構造体で補強して金型側
支持台へ取付け支持されてなる射出成形機。1 The inner surface of the heating cylinder is reinforced with iron nitride material, and a resistance heating element is provided near the inner wall surface of the heating cylinder to form a thin wall, and its injection side tip is reinforced with a reinforcing structure. An injection molding machine that is mounted and supported on the mold side support stand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18107086A JPS6337913A (en) | 1986-07-31 | 1986-07-31 | Injection molder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18107086A JPS6337913A (en) | 1986-07-31 | 1986-07-31 | Injection molder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6337913A JPS6337913A (en) | 1988-02-18 |
| JPH0414864B2 true JPH0414864B2 (en) | 1992-03-16 |
Family
ID=16094274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18107086A Granted JPS6337913A (en) | 1986-07-31 | 1986-07-31 | Injection molder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6337913A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01215526A (en) * | 1988-02-24 | 1989-08-29 | Meiki Co Ltd | Heating method for heating cylinder of injection device and device there |
-
1986
- 1986-07-31 JP JP18107086A patent/JPS6337913A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6337913A (en) | 1988-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6797925B1 (en) | Electric heating element for hot runner systems and a method for producing a heating element of this type | |
| JP2922147B2 (en) | Hot runner | |
| KR20120018746A (en) | Forming tool | |
| EP0920969A1 (en) | Injection molding means | |
| JPH10188707A (en) | Molding method of compound insulator and metal mold device used therefor | |
| JPH0414864B2 (en) | ||
| FI71264C (en) | MULTIPELGJUTHOLK MED HETKANAL | |
| US6040562A (en) | Structure for uniform heating in a heating device | |
| JPH04265720A (en) | Surface heating mold | |
| EP0551830A1 (en) | Flexible heating element for a hot runner housing including method of manufacture and method of installation | |
| US5645867A (en) | Heated distribution manifold | |
| JPH0223335B2 (en) | ||
| JP4675194B2 (en) | Hot water heater | |
| JPH05116182A (en) | Plastic molding die | |
| JPS6348691B2 (en) | ||
| JPS62191117A (en) | Manifold block | |
| JP3406239B2 (en) | Cylinder heating method and apparatus for metal injection molding machine | |
| JP4097879B2 (en) | Casting equipment | |
| JP2678960B2 (en) | Cylinder assembly of injection unit | |
| JPS62199419A (en) | Method for heating at plastic molding machine | |
| JP2001054914A (en) | Mold apparatus | |
| JP2509297Y2 (en) | Nozzle heating device for injection molding machine | |
| KR0145996B1 (en) | A device for heating periphery of semiconductor mold die | |
| JP2000015665A (en) | Injection mold | |
| JP2000263592A (en) | Nozzle device of injection molding machine |