JPH03223403A - Manufacture of screw for plastic forming machine and method for forming alloy layer - Google Patents
Manufacture of screw for plastic forming machine and method for forming alloy layerInfo
- Publication number
- JPH03223403A JPH03223403A JP2014810A JP1481090A JPH03223403A JP H03223403 A JPH03223403 A JP H03223403A JP 2014810 A JP2014810 A JP 2014810A JP 1481090 A JP1481090 A JP 1481090A JP H03223403 A JPH03223403 A JP H03223403A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- base material
- screw
- glass
- alloy
- 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
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 74
- 239000000956 alloy Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 66
- 239000000463 material Substances 0.000 claims abstract description 55
- 239000011521 glass Substances 0.000 claims abstract description 53
- 238000005260 corrosion Methods 0.000 claims abstract description 23
- 230000007797 corrosion Effects 0.000 claims abstract description 23
- 238000011282 treatment Methods 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000005245 sintering Methods 0.000 claims abstract description 12
- 238000007751 thermal spraying Methods 0.000 claims abstract description 6
- 238000010137 moulding (plastic) Methods 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 4
- 229940098458 powder spray Drugs 0.000 claims 4
- 238000005299 abrasion Methods 0.000 claims 1
- 238000001513 hot isostatic pressing Methods 0.000 abstract description 20
- 239000002775 capsule Substances 0.000 abstract description 10
- 229910001315 Tool steel Inorganic materials 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 abstract 1
- 239000005297 pyrex Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 description 15
- 239000012467 final product Substances 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000009694 cold isostatic pressing Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 235000003325 Ilex Nutrition 0.000 description 2
- 241000209035 Ilex Species 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000000758 substrate Substances 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はプラスチック成形機用スクリューの製造方法お
よび合金層の形成方法にかがわるもので、とくにカプセ
ルとしてガラス粉末を溶射することにより、耐摩耗性お
よび耐腐食性に優れた製品を安価に製造することができ
るプラスチック成形機用スクリューの製造方法および合
金層の形成方法に関するものである。Detailed Description of the Invention [Industrial Application Field] The present invention relates to a method for manufacturing a screw for a plastic molding machine and a method for forming an alloy layer. The present invention relates to a method for manufacturing a screw for a plastic molding machine and a method for forming an alloy layer, which allow products with excellent wear resistance and corrosion resistance to be manufactured at low cost.
［従来の技術］
従来からスクリューその他の製品の耐摩耗性および耐腐
食性を改善するために、その表面にこうした特性に優れ
た合金層を形成す−ることが行われている。[Prior Art] Conventionally, in order to improve the wear resistance and corrosion resistance of screws and other products, an alloy layer having excellent properties has been formed on the surface thereof.
一例として特開昭６３−１６２８０１号に開示されてい
る樹脂加工機械用スクリューの製造法を第７図にもとづ
き概説する。As an example, a method for manufacturing a screw for a resin processing machine disclosed in Japanese Patent Application Laid-open No. 162801/1983 will be outlined based on FIG.
第７図は上記製造法の一工程を示す開面図で、耐摩耗性
および耐腐食性の合金粉末を冷間静水圧加圧処理（ＣＩ
Ｐ）によりスクリュー形状に形成して円筒状の圧粉体１
を得る。この円筒状の圧粉体１の中に焼結接合用芯金２
を挿入し、熱間静水圧加圧処理（ＨＩ Ｐ）により円筒
状の圧粉体１の成形、および焼結接合用芯金２との接合
を行う。Figure 7 is an open view showing one step of the above manufacturing method, in which the wear-resistant and corrosion-resistant alloy powder is subjected to cold isostatic pressing (CI).
P) to form a cylindrical powder compact 1 into a screw shape.
get. Inside this cylindrical powder compact 1 is a core metal 2 for sintering and joining.
is inserted, and a cylindrical green compact 1 is formed by hot isostatic pressing (HIP) and bonded to a core bar 2 for sintering and bonding.
最後に加工ないし研削により製品形状とする。Finally, the product is shaped by processing or grinding.
しかしながらこの製造方法では冷間静水圧加圧処理（Ｃ
ＩＰ）を必要とするため、コストアップになるという問
題がある。However, in this manufacturing method, cold isostatic pressure treatment (C
There is a problem in that the cost increases because it requires IP (IP).
従来の製造方法の他の例としては、第８図に示すように
、耐摩耗性および耐腐食性の合金粉末３をスクリュー母
材４と円筒状のカプセル５との間に充填し、熱間静水圧
加圧処理（ＨＩＰ）により上記合金粉末３を焼結し、カ
プセル５を除去後、製品形状に加工することも行われて
いる。As another example of the conventional manufacturing method, as shown in FIG. 8, wear-resistant and corrosion-resistant alloy powder 3 is filled between a screw base material 4 and a cylindrical capsule 5, and hot It is also practiced to sinter the alloy powder 3 by hydrostatic pressing (HIP), remove the capsule 5, and then process it into a product shape.
この従来の方法では、焼結した状態の合金粉末３が硬質
でゐるため、ＨＩＰ成形後スクリュー形状に加工する工
程のコストが高いという他の問題がある。また、こうし
た製品形状に類似する外形を形成するニアネット成形が
必要であるために、このスクリューを含めて三次元的に
複雑な形状を有する製品の場合には、上記カプセル５に
相当するカプセルの製作コストが上昇するという問題も
ある。Another problem with this conventional method is that since the alloy powder 3 in the sintered state is hard, the process of processing it into a screw shape after HIP forming is expensive. In addition, since near-net molding is required to form an external shape similar to the product shape, in the case of a product with a three-dimensionally complex shape including this screw, a capsule equivalent to capsule 5 described above may be used. There is also the problem of increased production costs.
［発明が解決しようとするｌ１Ｍ］
本発明は以上のような諸問題にかんがみてなされたもの
で、従来のようにＣＩＰ処理を必要とせず、またＨＩＰ
処理用の従来からの円筒状のカプセルも使用しないで、
耐摩耗性および耐腐食性のあるスクリュー等の製品を安
価に製造することができるプラスチック成形機用スクリ
ューの製造方法および合金層の形成方法を提供すること
を課題とする。[l1M to be solved by the invention] The present invention has been made in view of the above-mentioned problems, and does not require CIP processing as in the past, and can
Without using traditional cylindrical capsules for processing,
It is an object of the present invention to provide a method for manufacturing a screw for a plastic molding machine and a method for forming an alloy layer, which allow products such as screws with wear resistance and corrosion resistance to be manufactured at low cost.
［課題を解決するための手段］
すなわち第一の発明は、スクリュー母材の表面に耐摩耗
性および耐腐食性の合金層を形成するプラスチック成形
機用スクリューの製造方法であって、上記スクリュー母
材を所定のスクリュー形状に加工してスクリュー形状母
材を準備する工程と、このスクリュー形状母材の表面に
耐摩耗性および耐腐食性の合金粉末を溶射して合金粉末
溶射層を形成する工程と、この合金粉末溶射層の表面に
ガラス粉末を溶射してガラス粉末溶射層を形成し、ＨＩ
Ｐ用母材を準備する工程と、加熱処理を先行させた熱間
静水圧加圧処理により上記ガラス粉末溶射層を上記スク
リュー形状に合わせて加圧処理してガラス層を形成する
とともに上記合金粉末溶射層を加圧焼結して合金層を形
成する工程と、上記ガラス層を除去する工程と、上記合
金層を上記所定のスクリュー形状に合わせて加工する工
程とを有することを特徴とするプラスチック成形機用ス
クリューの製造方法である。[Means for Solving the Problem] That is, the first invention is a method for manufacturing a screw for a plastic molding machine in which a wear-resistant and corrosion-resistant alloy layer is formed on the surface of a screw base material, the method comprising: A process of preparing a screw-shaped base material by processing the material into a predetermined screw shape, and a process of thermally spraying wear-resistant and corrosion-resistant alloy powder onto the surface of this screw-shaped base material to form a sprayed alloy powder layer. Then, glass powder is sprayed on the surface of this alloy powder sprayed layer to form a glass powder sprayed layer, and HI
A process of preparing a base material for P, and pressurizing the glass powder sprayed layer to match the screw shape by hot isostatic pressure treatment preceded by heat treatment to form a glass layer and applying the alloy powder. A plastic characterized by comprising the steps of forming an alloy layer by pressurizing and sintering the sprayed layer, removing the glass layer, and processing the alloy layer to fit the predetermined screw shape. This is a method for manufacturing a screw for a molding machine.
また第二の発明は、製品母材の表面に耐摩耗性および耐
腐食性の合金層を形成する合金層の形成方法であって、
上記製品母材を所定の製品形状に加工して製品形状母材
を準備する工程と、この製品形状母材の表面に耐摩耗性
および耐腐食性の合金粉末を溶射して合金粉末溶射層を
形成する工程と、この合金粉末溶射層の表面にガラス粉
末を溶射してガラス粉末溶射層を形成し、ＨＩＰ用母材
を準備する工程と、加熱処理を先行させた熱間静水圧加
圧処理により上記ガラス粉末溶射層を上記製品形状に合
わせて加圧処理してガラス層を形成するとともに上記合
金粉末溶射層を加圧焼結して合金層を形成する工程と、
上記ガラス層を除去する工程と、上記合金層を上記所定
の製品形状に合わせて加工する工程とを有することを特
徴とする合金層の形成方法である。The second invention is a method for forming an alloy layer that is wear-resistant and corrosion-resistant on the surface of a product base material,
A process of preparing a product-shaped base material by processing the above-mentioned product base material into a predetermined product shape, and spraying wear-resistant and corrosion-resistant alloy powder onto the surface of the product-shaped base material to form an alloy powder sprayed layer. a step of thermally spraying glass powder on the surface of this alloy powder sprayed layer to form a glass powder sprayed layer and preparing a base material for HIP, and a hot isostatic pressing process preceded by heat treatment. Pressure-treating the glass powder sprayed layer to match the product shape to form a glass layer, and pressurizing and sintering the alloy powder sprayed layer to form an alloy layer;
This method of forming an alloy layer includes the steps of removing the glass layer and processing the alloy layer to fit the predetermined product shape.
つぎに、第１図ないし第６図にもとづき本発明をより詳
細に説明する。まず第１図に示すような円柱状のスクリ
ュー母材（製品母材）１０をスクリュー形状（製品形状
）に加工することによりスクリュー形状母材（製品形状
母材）１１を準備する（第２図）。このスクリュー母材
１０の材質としては、Ｃｒ−Ｍｏ鋼、冷間および熱間工
具鋼、高速度工具鋼などがある。Next, the present invention will be explained in more detail based on FIGS. 1 to 6. First, a screw-shaped base material (product-shaped base material) 11 is prepared by processing a cylindrical screw base material (product-shaped base material) 10 into a screw shape (product shape) as shown in FIG. 1 (FIG. 2). ). Materials for the screw base material 10 include Cr-Mo steel, cold and hot tool steel, and high-speed tool steel.
またスクリュー形状母材１１の寸法としては、第３図に
示すように、最終製品（スクリュー）寸法より所定寸法
Ａ（たとえば０．５ｍｍ）だけ少なく設定する。Further, as shown in FIG. 3, the dimensions of the screw-shaped base material 11 are set to be smaller than the dimensions of the final product (screw) by a predetermined dimension A (for example, 0.5 mm).
つぎに第４図に示すように、上記スクリュー形状母材１
１の表面上に溶射処理により耐摩耗性および耐腐食性の
合金粉末を溶射して合金粉末溶射層１２を厚さＢ（たと
えば１ａＩＩ）に形成する。この合金粉末としてはＦｅ
系、Ｎｉ系あるいはＣ。Next, as shown in FIG. 4, the screw-shaped base material 1
A wear-resistant and corrosion-resistant alloy powder is thermally sprayed onto the surface of the substrate 1 by a thermal spraying process to form an alloy powder thermal spray layer 12 having a thickness of B (for example, 1aII). As this alloy powder, Fe
type, Ni type or C.
系のものを採用する。Adopt a system.
つぎに、同じく第４図に示すように、上記合金粉末溶射
層１２の上にガラス粉末を溶射してガラス粉末溶射層１
３を形成するすることにより、ＨＩＰ用母材１４を形成
する。なお、上記ガラス溶射粉末層１３内にはピンホー
ルなどの貫通孔が残らないようにする。またガラス粉末
溶射層１３の材質としては、軟化温度の低い、たとえば
ノ（イレックスガラスが望ましい。この溶射の厚さはＣ
（たとえば１ ｆｆ１ｍ）とする。Next, as shown in FIG. 4, glass powder is sprayed onto the alloy powder sprayed layer 12 to form a glass powder sprayed layer 1.
3, the HIP base material 14 is formed. Note that no through-holes such as pinholes remain in the glass thermal spray powder layer 13. The material for the glass powder sprayed layer 13 is desirably a material with a low softening temperature, such as Ilex glass.The thickness of this sprayed layer is C
(For example, 1 ff1m).
こうした準備の完了後、ＨＩＰ用母材１４をＨＩＰ処理
することにより、合金粉末溶射層１２を真密度になるよ
うに加圧焼結する。After completion of these preparations, the HIP base material 14 is subjected to HIP treatment to pressure-sinter the alloy powder sprayed layer 12 to true density.
ここでＨＩＰ処理条件としては、加熱処理を先行させる
温度先行タイプとする。すなわち第５図に示すように、
まずガラスの軟化温度以上（）（イレックスガラスでは
７５０℃）にまでＨＩ Ｐ炉内の温度を上げることによ
りガラスが破損する恐れがない状態にしたのち、加熱温
度をさらに上昇させるとともに炉内圧力を上昇させ、合
金粉末溶射層１２の加圧焼結を図る。Here, the HIP treatment conditions are a temperature-advance type in which heat treatment is performed in advance. That is, as shown in Figure 5,
First, the temperature in the HIP furnace is raised to above the softening temperature of the glass (750°C for Ilex glass) to ensure that there is no risk of glass breakage, and then the heating temperature is further raised and the pressure in the furnace is increased. is raised to achieve pressure sintering of the alloy powder sprayed layer 12.
こうした温度先行タイプとした理由は、ガラスの軟化点
以下で加圧処理を開始するとガラスが破損するため、ア
ルゴン等の圧媒ガスが合金粉末溶射Ｎ１１２内に侵入し
、合金粉末溶射層１２の加圧焼結が不可能になるからで
ある。つまりこの温度先行タイプとすることによりガラ
ス粉末溶射層１３がまず軟化し、ＨＩＰ処理における合
金粉末溶射層１２の加圧焼結の収縮によく追随すること
ができることとなる。The reason for this type of temperature advance type is that if the pressure treatment is started below the softening point of the glass, the glass will break. This is because pressure sintering becomes impossible. In other words, by using this temperature advance type, the glass powder sprayed layer 13 is first softened and can closely follow the shrinkage of the alloy powder sprayed layer 12 during pressure sintering in the HIP process.
なおＨＩＰ条件としては、加熱温度９５０℃〜１１００
℃、加圧圧力１０００ Ｋｇｆ／ｃポ、処理時間２〜４
時間である。The HIP conditions include a heating temperature of 950°C to 1100°C.
°C, pressure 1000 Kgf/c, processing time 2-4
It's time.
こうしたＨＩＰ処理によって合金粉末溶射層１２は、収
縮寸法Ｄ（第３図）だけ収縮するとともに合金層１５と
なり、ガラス粉末溶射層１３はガラス層１６となる（第
６図）。Through such HIP treatment, the alloy powder sprayed layer 12 shrinks by the shrinkage dimension D (FIG. 3) and becomes the alloy layer 15, and the glass powder sprayed layer 13 becomes the glass layer 16 (FIG. 6).
このガラス層１６をか性ソーダにより溶出、あるいは機
械加工により除去する。さらに、第３図に示すように上
記合金層１５を研磨加工により（研磨寸法Ｅ）、スクリ
ュー（最終製品）１７に仕上げる。This glass layer 16 is removed by elution with caustic soda or by machining. Furthermore, as shown in FIG. 3, the alloy layer 15 is polished (polishing dimension E) to form a screw (final product) 17.
つまり本発明においては、ガラス軟化以上でＨＩＰ処理
を開始することにより上記ガラス粉末溶射層１３ないし
はガラス層１６をカプセルとして用いることによって、
合金粉末溶射層１２を確実に被覆した上で加圧焼結する
ことができる。That is, in the present invention, by starting the HIP treatment at a temperature higher than the softening of the glass and using the glass powder sprayed layer 13 or the glass layer 16 as a capsule,
Pressure sintering can be performed after the alloy powder sprayed layer 12 is reliably coated.
なお、本発明はスクリューのみならず、一般の部品に異
種材料のコーティングを施す場合に有効であり、とくに
複雑な外形を有し、ＨＩ Ｐ用カプセルの製作コストが
かかるもの、たとえば多条ネジ、あるいは混連プロペラ
などの表面に合金層を形成するために好適である。Note that the present invention is effective not only for screws but also for applying coatings of different materials to general parts, and is particularly effective for applying coatings of different materials to general parts, such as those having complicated external shapes and requiring high production costs for HIP capsules, such as multi-thread screws, Alternatively, it is suitable for forming an alloy layer on the surface of a mixed propeller or the like.
［作用コ
本発明によるプラスチック成形機用スクリューの製造方
法および合金層の形成方法においては、スクリュー等所
定の製品の形状にあらかじめ加工した母材に耐摩耗性お
よび耐腐食性の合金粉末を溶射するとともに、さらにそ
の上にガラス溶射層を形成した上でＨＩＰ処理すること
としたので、加熱により軟化したガラスが加圧により母
材の外形に追随し内部の合金溶射層の焼結を実現するこ
とができる。このガラスは簡単な処理により除去するこ
とが可能であり、最終製品として加工することも低コス
トでこれを行うことができる。[Operation] In the method for manufacturing a screw for a plastic molding machine and the method for forming an alloy layer according to the present invention, a wear-resistant and corrosion-resistant alloy powder is thermally sprayed onto a base material that has been processed in advance into the shape of a predetermined product such as a screw. At the same time, we decided to form a glass sprayed layer on top of it and then perform the HIP treatment, so the glass softened by heating follows the outer shape of the base material under pressure, and the internal alloy sprayed layer is sintered. I can do it. This glass can be removed by simple processing and can be processed into a final product at low cost.
したがって、耐摩耗性および耐腐食性の合金層を低コス
トで形成することができるものである。Therefore, a wear-resistant and corrosion-resistant alloy layer can be formed at low cost.
［実施例］ つぎに本発明の一実施例を説明する 第１表に合金粉末の組成の一例を示す。[Example] Next, one embodiment of the present invention will be explained. Table 1 shows an example of the composition of the alloy powder.
第１表 なお上記合金粉末に、たとえばＷＣ，ＮｂＣ。Table 1 Note that the above alloy powder includes, for example, WC and NbC.
ＶＣなどの炭化物、ＴｉＢＺ、ＭｏＢなどのほう化物、
あるいはＡ １２０３、ＺｒＯ２などの酸化物等の硬質
粒子を必要に応じて添加することにより硬度の向上をは
かることもできる。Carbides such as VC, borides such as TiBZ and MoB,
Alternatively, the hardness can be improved by adding hard particles such as oxides such as A 1203 and ZrO2 as necessary.
ＨＩＰ条件としては、既述のように、加熱温度９５０℃
〜１１００℃、加圧圧力１０００Ｋｇｆ／ｃｒｒｆ、処
理時間２〜４時間である。As mentioned above, the HIP conditions were a heating temperature of 950°C.
~1100°C, pressure 1000 Kgf/crrf, and treatment time 2 to 4 hours.
かくして、低コストで耐摩耗性および耐腐食性の合金層
１５をスクリュー形状母材１１表面上に形成することが
できた。In this way, a wear-resistant and corrosion-resistant alloy layer 15 could be formed on the surface of the screw-shaped base material 11 at low cost.
［発明の効果］
以上のように本発明によれば、従来の粉体焼結方法にお
いて、カプセルの機能を有する被覆体をガラス粉末から
構成し、加熱先行によりガラスの破損を防止するととも
に、合金粉末溶射層の収縮に追随して軟化したガラス層
によりその表面を被覆させたので、従来のような高価な
処理を行うことなく、また加工処理も安価にすみ、低コ
ストで耐摩耗性および耐腐食性のスクリューを製造し、
あるいは耐摩耗性および耐腐食性の合金層を形成するこ
とができる。[Effects of the Invention] As described above, according to the present invention, in the conventional powder sintering method, the coating having the function of a capsule is made of glass powder, and the glass is prevented from breaking by heating first, and the alloy Since the surface is coated with a glass layer that softens as the powder sprayed layer shrinks, there is no need for conventional expensive treatments, and processing is also inexpensive, resulting in wear and tear resistance at low cost. Manufacture corrosive screws,
Alternatively, wear- and corrosion-resistant alloy layers can be formed.
第１図は本発明によるプラスチック成形機用スクリュー
の製造方法および合金層の形成方法におけるスクリュー
母材１０の正面図、
第２図は同、スクリュー形状母材１１の断面図、
第３図は同、成形寸法の断面説明図。
第４図は同、ＨＩＰ用母材１４の断面図、第５図は同、
加熱先行処理のグラフ、
第６図は同、スクリュー（最終製品）１７の断面図、
第７図は従来の製造方法の一工程を示す縦断面図、
第８図は、従来の他の製造方法の一工程を示す縦断面図
である。
１・・・・・・円筒状の圧粉体
２．、、、、、焼結接合用芯金
３ 、、、、、、耐摩耗性および耐腐食性の合金粉末４
・・・・・・スクリュー母材
５ 、、、、、、円筒状のカプセル
１０、、、、、、スクリュー母材（製品母材）１１ 、
、、、、、スクリュー形状母材（製品形状母材）１２、
、、、、、合金粉末溶射層
１３ 、、、、、、ガラス粉末溶射層
１４ 、、、、、、ＨＩ Ｐ用母材
１５ 、、、、、、合金層
１６ 、、、、、、ガラス層
１７ 、、、、、、スクリュー（最終製品）Ａ、、、、
、、、、スクリュー（最終製品）１７とスクリュー形状
母材１１の機械加工
寸法との差
Ｂ、、、、、、、、合金粉末溶射層１２の寸法Ｃ，，、
、、、、、ガラス粉末溶射層１３の寸法り、、、、、、
、、ＨＩ Ｐ処理による合金粉末溶射層１２の収縮寸法FIG. 1 is a front view of a screw base material 10 in the method of manufacturing a screw for a plastic molding machine and the method of forming an alloy layer according to the present invention, FIG. 2 is a sectional view of the screw-shaped base material 11, and FIG. 3 is the same. , a cross-sectional explanatory diagram of molding dimensions. Figure 4 is the same, a sectional view of the HIP base material 14, Figure 5 is the same,
Graph of the heating advance treatment, Figure 6 is a cross-sectional view of the screw (final product) 17, Figure 7 is a longitudinal cross-sectional view showing one step of the conventional manufacturing method, and Figure 8 is another conventional manufacturing method. FIG. 1... Cylindrical green compact 2. , , , Core metal for sintered joining 3 , , Wear-resistant and corrosion-resistant alloy powder 4
...Screw base material 5 , Cylindrical capsule 10 , Screw base material (product base material) 11 ,
, , , Screw-shaped base material (product-shaped base material) 12,
, Alloy powder sprayed layer 13 , Glass powder sprayed layer 14 , HI-P base material 15 , Alloy layer 16 , Glass layer 17. Screw (final product) A.
, , Difference B between the machining dimensions of the screw (final product) 17 and the screw-shaped base material 11 , , , Dimensions of the alloy powder sprayed layer 12 C, ,
, , , Dimensions of glass powder sprayed layer 13 , , , ,
, Shrinkage dimension of alloy powder sprayed layer 12 by HIP treatment
Claims (2)
の合金層を形成するプラスチック成形機用スクリューの
製造方法であつて、 前記スクリュー母材を所定のスクリュー形状に加工して
スクリュー形状母材を準備する工程と、このスクリュー
形状母材の表面に耐摩耗性および耐腐食性の合金粉末を
溶射して合金粉末溶射層を形成する工程と、 この合金粉末溶射層の表面にガラス粉末を溶射してガラ
ス粉末溶射層を形成し、ＨＩＰ用母材を準備する工程と
、 加熱処理を先行させた熱間静水圧加圧処理により前記ガ
ラス粉末溶射層を前記スクリュー形状に合わせて加圧処
理してガラス層を形成するとともに前記合金粉末溶射層
を加圧焼結して合金層を形成する工程と、 前記ガラス層を除去する工程と、 前記合金層を前記所定のスクリュー形状に合わせて加工
する工程とを有することを特徴とするプラスチック成形
機用スクリューの製造方法。(1) A method for manufacturing a screw for a plastic molding machine, which forms a wear-resistant and corrosion-resistant alloy layer on the surface of a screw base material, the screw base material being processed into a predetermined screw shape. a process of preparing a material, a process of thermally spraying a wear-resistant and corrosion-resistant alloy powder on the surface of this screw-shaped base material to form an alloy powder thermal spray layer, and a process of spraying glass powder on the surface of this alloy powder thermal spray layer. A process of thermal spraying to form a glass powder spray layer and preparing a base material for HIP, and pressurizing the glass powder spray layer to match the screw shape by hot isostatic pressure treatment preceded by heat treatment. forming a glass layer and pressure-sintering the alloy powder sprayed layer to form an alloy layer; removing the glass layer; processing the alloy layer to fit the predetermined screw shape. A method for manufacturing a screw for a plastic molding machine, comprising the steps of:
層を形成する合金層の形成方法であつて、前記製品母材
を所定の製品形状に加工して製品形状母材を準備する工
程と、 この製品形状母材の表面に耐摩耗性および耐腐食性の合
金粉末を溶射して合金粉末溶射層を形成する工程と、 この合金粉末溶射層の表面にガラス粉末を溶射してガラ
ス粉末溶射層を形成し、ＨＩＰ用母材を準備する工程と
、 加熱処理を先行させた熱間静水圧加圧処理により前記ガ
ラス粉末溶射層を前記製品形状に合わせて加圧処理して
ガラス層を形成するとともに前記合金粉末溶射層を加圧
焼結して合金層を形成する工程と、 前記ガラス層を除去する工程と、 前記合金層を前記所定の製品形状に合わせて加工する工
程とを有することを特徴とする合金層の形成方法。(2) A method for forming an alloy layer that forms an abrasion-resistant and corrosion-resistant alloy layer on the surface of a product base material, wherein the product base material is processed into a predetermined product shape to prepare a product-shaped base material. A step of thermally spraying a wear-resistant and corrosion-resistant alloy powder onto the surface of this product-shaped base material to form an alloy powder sprayed layer; A step of thermally spraying glass powder onto the surface of this alloy powder sprayed layer. A step of forming a glass powder spray layer and preparing a base material for HIP, and a hot isostatic pressure treatment preceded by heat treatment to press the glass powder spray layer to match the shape of the product to form glass. forming an alloy layer and pressure-sintering the alloy powder sprayed layer to form an alloy layer; removing the glass layer; and processing the alloy layer to fit the predetermined product shape. A method for forming an alloy layer, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014810A JP2698854B2 (en) | 1990-01-26 | 1990-01-26 | Method of manufacturing screw for plastic molding machine and method of forming alloy layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014810A JP2698854B2 (en) | 1990-01-26 | 1990-01-26 | Method of manufacturing screw for plastic molding machine and method of forming alloy layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03223403A true JPH03223403A (en) | 1991-10-02 |
| JP2698854B2 JP2698854B2 (en) | 1998-01-19 |
Family
ID=11871398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014810A Expired - Lifetime JP2698854B2 (en) | 1990-01-26 | 1990-01-26 | Method of manufacturing screw for plastic molding machine and method of forming alloy layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2698854B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103692635A (en) * | 2013-12-18 | 2014-04-02 | 章鹏 | High-wear-resistance iron boride alloy screw element for double-screw machine, and manufacturing method of iron boride alloy screw element |
| CN103717330A (en) * | 2011-08-01 | 2014-04-09 | 科倍隆有限公司 | Method and treatment-element blank for producing a treatment element for a screw machine |
| CN110181050A (en) * | 2019-06-04 | 2019-08-30 | 合肥工业大学 | A kind of SPS sintering connection method of WRe/TZM/ graphite |
| CN112893843A (en) * | 2021-01-15 | 2021-06-04 | 中国矿业大学 | Preparation method of MoNiB metal ceramic threaded element |
-
1990
- 1990-01-26 JP JP2014810A patent/JP2698854B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103717330A (en) * | 2011-08-01 | 2014-04-09 | 科倍隆有限公司 | Method and treatment-element blank for producing a treatment element for a screw machine |
| CN103692635A (en) * | 2013-12-18 | 2014-04-02 | 章鹏 | High-wear-resistance iron boride alloy screw element for double-screw machine, and manufacturing method of iron boride alloy screw element |
| CN110181050A (en) * | 2019-06-04 | 2019-08-30 | 合肥工业大学 | A kind of SPS sintering connection method of WRe/TZM/ graphite |
| CN112893843A (en) * | 2021-01-15 | 2021-06-04 | 中国矿业大学 | Preparation method of MoNiB metal ceramic threaded element |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2698854B2 (en) | 1998-01-19 |
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