JPH0426198B2 - - Google Patents
Info
- Publication number
- JPH0426198B2 JPH0426198B2 JP24479284A JP24479284A JPH0426198B2 JP H0426198 B2 JPH0426198 B2 JP H0426198B2 JP 24479284 A JP24479284 A JP 24479284A JP 24479284 A JP24479284 A JP 24479284A JP H0426198 B2 JPH0426198 B2 JP H0426198B2
- Authority
- JP
- Japan
- Prior art keywords
- sheathed heater
- casting
- metal plate
- mold
- attached
- 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
- 239000002184 metal Substances 0.000 claims description 27
- 239000003973 paint Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 4
- 238000003754 machining Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000012805 post-processing Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 description 18
- 238000004512 die casting Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Landscapes
- Resistance Heating (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はシーズヒータを金属板に装着してなる
熱板の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a hot plate in which a sheathed heater is attached to a metal plate.
従来シーズヒータは金属板に装着又は鋳込まれ
て熱板が構成される。
Conventionally, a sheathed heater is attached to or cast into a metal plate to form a hot plate.
一般的に金属板は、ダイキヤスト鋳造、グラビ
テイ鋳造あるいは低圧鋳造などの方法により得ら
れる。 Generally, metal plates are obtained by die casting, gravity casting, low pressure casting, or other methods.
第２図に示すように、シーズヒータ２は金属板
１内に鋳込まれている。 As shown in FIG. 2, the sheathed heater 2 is cast into the metal plate 1.
しかしながら、熱板を作る鋳造工程では、まず
シーズヒータ２を作り曲げ加工などを施したもの
を鋳造することから連続化して長期間の間隔が必
要となる。
However, in the casting process for making the hot plate, first the sheathed heater 2 is made and then subjected to bending and other processing, and then cast, which is continuous and requires long intervals.
ダイキヤスト鋳造の場合は、鋳造時の融解金属
の流れが悪くなり鋳巣やふくれあるいは湯じわ等
が生じる問題がある。 In the case of die casting, there is a problem that the flow of molten metal during casting is poor, resulting in formation of cavities, bulges, or creases.
鋳造工程において、シーズヒータ２はそのシー
ズヒータ２を鋳型にセツトしなければならず、鋳
造コストが高くなる問題がある。またシーズヒー
タ２が金属板１の中に固定されているため、完成
品に不良が生じた場合の再生が困難である。 In the casting process, the sheathed heater 2 must be set in a mold, which poses a problem of increasing casting cost. Furthermore, since the sheathed heater 2 is fixed within the metal plate 1, it is difficult to reproduce the finished product if it becomes defective.
そこで、第１図に示すように、シーズヒータ４
は金属板３を成形した後にその金属板２の凹溝５
に備える方法が用いられている。第１図を参照し
て、ダイキヤスト鋳造によれば、鋳肌が滑らかで
良いが、グラビテイ鋳造によれば、鋳肌が荒くシ
ーズヒータ４と金属板３の凹溝５との密着が悪く
なりシーズヒータ４の寿命が問題となる。 Therefore, as shown in FIG.
is the concave groove 5 of the metal plate 2 after forming the metal plate 3.
Methods are used to prepare for Referring to FIG. 1, die casting has a smooth casting surface, but gravity casting has a rough casting surface and poor adhesion between the sheathed heater 4 and the groove 5 of the metal plate 3, resulting in sheathing. The lifespan of the heater 4 becomes a problem.
したがつて、シーズヒータ１の取付部分は機械
加工によつて表面荒さをダイキヤスト鋳造なみに
保持しているが、そのために加工コストが高くな
るとともに、生産性も悪いため、高品化には多く
の問題がある。 Therefore, the mounting part of the sheathed heater 1 is machined to maintain a surface roughness comparable to that of die casting, but this increases processing costs and lowers productivity, so it is difficult to achieve high quality. There is a problem.
それ故に、本考案の目的はシーズヒータを装着
する金属板の凹溝の機械加工を行なうことなくシ
ーズヒータを後付けする熱板の製造方法を提供す
ることにある。 Therefore, an object of the present invention is to provide a method of manufacturing a hot plate in which a sheathed heater can be retrofitted without machining the grooves of the metal plate to which the sheathed heater is attached.
本考案によれば鋳型に耐熱塗料を塗布し、さら
にその塗布された鋳型面のシーズヒータ装着用部
分の耐熱塗料を他の鋳型面の塗布部分より滑らか
に研摩した後に金属を加熱融解して液状にした融
解金属を流し込み、冷却後に作られた金属板のシ
ーズヒータ装着部分を機械加工等の後加工せずに
シーズヒータを装着してなる熱板の製造方法が得
られる。
According to the present invention, a heat-resistant paint is applied to the mold, and the coated heat-resistant paint on the part of the mold surface where the sheathed heater is attached is polished smoother than the other parts of the mold surface, and then the metal is heated and melted to form a liquid. A method for manufacturing a hot plate is obtained in which a sheathed heater is attached to the sheathed heater-attached portion of the metal plate made after pouring the molten metal into the heated metal plate without performing any post-processing such as machining.
第１図の従来例で示した熱板を用いて以下に本
発明を説明する。
The present invention will be explained below using the hot plate shown in the conventional example of FIG.
金属板３は鋳型の空間部に金属を加熱融解して
液状にした融解金属を流し込み冷却して固まつて
から、それを取り出して作られる。この際、グラ
ビテイ鋳造の場合、鋳肌の荒さは鋳型に塗布され
る耐熱塗料面の荒さによつて決まる。そこで鋳型
面を滑らかに研摩し、粒子を細かくして、その後
にその鋳型に耐熱塗料を塗布する。シーズヒータ
４を装着するための金属板３の凹溝５は、その凹
溝５の内部の塗膜をサンドペーパーなどの研摩治
具を用いて滑らかに仕上げられる。その後に鋳造
が行なわれると滑らかに鋳肌が得られる。これに
よればダイキヤスト鋳造と同等の金属板３が得ら
れ、シーズヒータ４を金属板３の凹溝５に装着が
行なわれる。 The metal plate 3 is made by pouring molten metal, which has been heated and melted into a liquid state, into the space of a mold, cooling and solidifying it, and then taking it out. In the case of gravity casting, the roughness of the casting surface is determined by the roughness of the heat-resistant paint surface applied to the mold. Therefore, the mold surface is ground smooth to make the particles finer, and then a heat-resistant paint is applied to the mold. The coating film inside the groove 5 of the metal plate 3 for mounting the sheathed heater 4 is smoothed using a polishing jig such as sandpaper. When casting is performed thereafter, a smooth casting surface is obtained. According to this, a metal plate 3 equivalent to die casting is obtained, and the sheathed heater 4 is mounted in the groove 5 of the metal plate 3.
鋳型面に塗布された耐熱塗料は融解金属の流動
性を良くする役割りを持ち、鋳型面に接した融解
金属が急冷固化することなく末端まで流れ込み、
いわゆるシヨートモールドや鋳栄の不良発生を防
ぐ重要な役割りを負つている。 The heat-resistant paint applied to the mold surface has the role of improving the fluidity of the molten metal, allowing the molten metal in contact with the mold surface to flow to the end without rapidly cooling and solidifying.
It plays an important role in preventing defects in so-called shot molds and casting molds.
第１図に示すようにシーズヒータ４を加締め等
の後付けを行なうための凹溝５とその両側の凸状
のリブによつて、他の部分より偏肉するため、鋳
造時の融解金属の固化が遅れ、その周囲が先に固
化するため、このシーズヒータ４装着部付近にヒ
ケや鋳栄が発生して鋳造不良となるような事が防
げる。 As shown in Fig. 1, the groove 5 and the convex ribs on both sides of the sheathed heater 4 for retrofitting the sheathed heater 4 cause uneven thickness compared to other parts, so the molten metal during casting is Since the solidification is delayed and the surrounding area solidifies first, it is possible to prevent sink marks and casting defects from occurring near the sheathed heater 4 mounting portion, which would result in poor casting.
即ち、このようにシーズヒータ４装着部付近の
固化遅れをなくし、他の部分との固化、スピード
バランスを保つためには、鋳型表面に塗布する耐
熱塗料の断熱性を弱める。つまり塗料厚さを薄く
して調整することによつて鋳型への熱伝導が良く
なり、冷却効果が増すために固化順が均一化しバ
ランスが保たれるようになり、鋳造不良が防げ
る。 That is, in order to eliminate the solidification delay in the vicinity of the sheathed heater 4 attachment part and maintain solidification and speed balance with other parts, the heat insulation properties of the heat-resistant paint applied to the mold surface are weakened. In other words, by adjusting the thickness of the paint to make it thinner, heat conduction to the mold becomes better, which increases the cooling effect, which makes the solidification order uniform and maintains a balance, thereby preventing casting defects.
以上本発明によれば、シーズヒータ装着部の耐
熱塗料を他の部分より滑らかに研摩する工程は、
塗膜厚を調整する事になり、不良発生の防止効果
と、機械加工が不要になるためコストダウンを兼
ね、且つシーズヒータの曲げ形状にとらわれるこ
となく金属板に装着でき、温度分布の大巾な向上
が計れる。
According to the present invention, the step of polishing the heat-resistant paint on the sheathed heater attachment part more smoothly than other parts is as follows:
By adjusting the coating thickness, it has the effect of preventing the occurrence of defects and reducing costs because no machining is required. Furthermore, it can be attached to a metal plate without being restricted by the bent shape of the sheathed heater, and the temperature distribution is wide. Improvements can be measured.
第１図は従来のと本発明を共に示した熱板を示
す斜視断面図、第２図は、従来の熱板を示す断面
図である。
１……金属板、２……シーズヒータ、３……金
属板、４……シーズヒータ、５……凹溝。
FIG. 1 is a perspective sectional view showing a conventional heating plate and a heating plate according to the present invention, and FIG. 2 is a sectional view showing a conventional heating plate. 1... Metal plate, 2... Sheathed heater, 3... Metal plate, 4... Sheathed heater, 5... Concave groove.
Claims (1)
れた鋳型面のシーズヒータ装着用部分の耐熱塗料
を他の鋳型面より滑らかに研摩した後に、金属を
加熱融解して液状にした融解金属を流し込み、冷
却後に作られた金属板のシーズヒータ装着用部分
を機械加工等の後加工させずにシーズヒータを装
着してなる熱板の製造方法。1. Apply heat-resistant paint to the mold, and then polish the applied heat-resistant paint on the part of the mold surface where the sheathed heater is attached to be smoother than on other mold surfaces, and then pour in the molten metal that has been heated and melted into liquid form. , A method for manufacturing a hot plate in which a sheathed heater is attached to the sheathed heater attachment portion of the metal plate made after cooling without performing any post-processing such as machining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24479284A JPS61124088A (en) | 1984-11-20 | 1984-11-20 | Manufacture of hot plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24479284A JPS61124088A (en) | 1984-11-20 | 1984-11-20 | Manufacture of hot plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61124088A JPS61124088A (en) | 1986-06-11 |
| JPH0426198B2 true JPH0426198B2 (en) | 1992-05-06 |
Family
ID=17123996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24479284A Granted JPS61124088A (en) | 1984-11-20 | 1984-11-20 | Manufacture of hot plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61124088A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4845146B2 (en) * | 1997-07-31 | 2011-12-28 | コバレントマテリアル株式会社 | Carbon heater |
| JP4185194B2 (en) * | 1997-07-31 | 2008-11-26 | コバレントマテリアル株式会社 | Carbon heater |
| JP4198901B2 (en) * | 1997-07-31 | 2008-12-17 | コバレントマテリアル株式会社 | Carbon heater |
-
1984
- 1984-11-20 JP JP24479284A patent/JPS61124088A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61124088A (en) | 1986-06-11 |
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