JPH05278084A - Screw member for injection molding machine - Google Patents

Screw member for injection molding machine

Info

Publication number
JPH05278084A
JPH05278084A JP7715992A JP7715992A JPH05278084A JP H05278084 A JPH05278084 A JP H05278084A JP 7715992 A JP7715992 A JP 7715992A JP 7715992 A JP7715992 A JP 7715992A JP H05278084 A JPH05278084 A JP H05278084A
Authority
JP
Japan
Prior art keywords
screw
ring valve
screw head
injection molding
screw member
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.)
Withdrawn
Application number
JP7715992A
Other languages
Japanese (ja)
Inventor
Ichiro Matsuura
市朗 松浦
Tsutomu Kato
務 加藤
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.)
NGK Insulators Ltd
Original Assignee
NGK Insulators 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 NGK Insulators Ltd filed Critical NGK Insulators Ltd
Priority to JP7715992A priority Critical patent/JPH05278084A/en
Publication of JPH05278084A publication Critical patent/JPH05278084A/en
Withdrawn legal-status Critical Current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
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/46Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50Axially movable screw
    • B29C45/52Non-return devices
    • 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
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/46Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50Axially movable screw
    • B29C45/52Non-return devices
    • B29C2045/526Abrasion resistant means in the screw head or non-return device

Landscapes

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

Abstract

PURPOSE:To provide a screw member for an injection molding machine with excellent heat resistance and wear resistance and reduced cost. CONSTITUTION:A ring valve 10 and a screw head 20 are provided in a screw member. The ring valve 10 has a cylindrical shape and a plurality of channels 12 wherein a molding material passes on the apex side. In addition, on the screw head 20, a sharpened head part 24 is provided on the apex side of a cylindrical screw head main body 22. The ring valve 10 is formed of a specified resin or a ring member consisting of a specified resin is mounted on the outer peripheral part of the screw head main body 22.

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、射出成形機に使用され
るスクリュー部材に関し、更に詳細には、セラミックス
用インラインスクリュー式射出成形機に使用されるリン
グバルブ及びスクリューヘッド等の改良に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw member used in an injection molding machine, and more particularly to improvement of a ring valve and a screw head used in an in-line screw type injection molding machine for ceramics.

【0002】[0002]

【従来の技術】従来、射出成形機のリングバルブ、スク
リューヘッド等には、硬質合金、サーメット等が使用さ
れており、特に、摩耗の激しい成形材料を用いる場合に
は、WC、TiC等の硬質物質を溶射法又はCVDによ
り前記リングバルブ等に更に被覆して使用していた。
2. Description of the Related Art Conventionally, hard alloys, cermets, etc. have been used for ring valves, screw heads, etc. of injection molding machines. Especially, when a molding material with severe wear is used, WC, TiC, etc. The ring valve or the like was further coated with a substance by a thermal spraying method or CVD and used.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、セラミ
ックス製品や粉末冶金製品の射出成形機においては、リ
ングバルブ、スクリューヘッド等の部品は、摺動部に硬
質のセラミックス材が介在するため、WC、TiC等の
硬質物質を被覆したものであっても激しい摩擦に耐えら
れず摩耗してしまうという課題があった。
However, in the injection molding machine for ceramic products and powder metallurgy products, the components such as the ring valve and the screw head have the hard ceramic material intervening in the sliding portions, so that WC and TiC are used. However, there is a problem in that even a material coated with a hard substance, such as, cannot withstand severe friction and is worn.

【0004】特に、WC、TiC被覆層の厚みは10μ
m程度とわずかであるため、母体金属が局部的に露出す
ると、その部分を中心に急激に摩耗が進行する。このよ
うな著しく摩耗したリングバルブ等をそのまま使用し続
けると、所定圧力が得られず良好な成形体が得られない
のみならず、それ以前に、摩耗により発生した摩耗粉が
成形材料に混入し、不純物不良となるという課題があ
り、このことは、セラミックス材料においては焼結体の
品質を低下させる重大な要因であった。
In particular, the thickness of the WC and TiC coating layer is 10 μm.
Since it is as small as about m, if the base metal is locally exposed, the wear rapidly progresses around that part. If such a ring valve that is significantly worn is continuously used as it is, not only a predetermined pressure cannot be obtained and a good molded product cannot be obtained, but before that, abrasion powder generated by abrasion is mixed into the molding material. However, there is a problem of defective impurities, which is a serious factor in deteriorating the quality of a sintered body in a ceramic material.

【0005】一方、種々の樹脂材料が知られているが、
一般に、これら樹脂材料は金属材料に比し耐熱性に劣り
低硬度かつ低強度である。このため、リングバルブ等へ
の適用については、成形材料が加熱されている部分で使
用するのは不適であり、また、摩擦で発生する局部的な
高温に対する耐熱性がないと考えられており、あまり考
慮されていなかった。更に、樹脂材料は一般に熱膨張率
が大きく、金属材料との間では機械的な精度を保つこと
が困難であり、気密性を要求されるリングバルブ及びス
クリューヘッドの材料としては使用できるものではない
と考えられていた。
On the other hand, although various resin materials are known,
Generally, these resin materials are inferior in heat resistance to metal materials and have low hardness and low strength. Therefore, for application to ring valves and the like, it is unsuitable to use in a portion where the molding material is heated, and it is considered that there is no heat resistance to the local high temperature generated by friction, It wasn't considered much. Furthermore, resin materials generally have a large coefficient of thermal expansion, and it is difficult to maintain mechanical precision with metal materials, and therefore they cannot be used as materials for ring valves and screw heads that require airtightness. Was considered.

【0006】また、前述したWC、TiC等を被覆した
リングバルブ等においては、製造コストが高くなるとい
う課題があった。本発明は、このような従来技術の有す
る課題に鑑みてなされたものであり、その目的とすると
ころは、耐熱性、耐摩耗性に優れ、かつコストの低減し
た射出成形機用スクリュー部材を提供することにある。
Further, in the above-mentioned ring valve etc. coated with WC, TiC, etc., there is a problem that the manufacturing cost becomes high. The present invention has been made in view of the above problems of the prior art, and an object thereof is to provide a screw member for an injection molding machine, which is excellent in heat resistance, wear resistance, and cost. To do.

【0007】[0007]

【課題を解決するための手段】本発明者は、前記課題を
解決すべく鋭意研究した結果、特定の樹脂を用いてスク
リューヘッド及び/又はリングバルブを形成し、これら
両部材をスクリュー部材に配設することにより、前記課
題が解決されることを見出し本発明を完成するに至っ
た。従って、本発明の射出成形機用スクリュー部材は、
射出成形機の射出部に用いるスクリュー部材において、
このスクリュー部材はスクリューヘッドとリングバルブ
を備え、前記スクリューヘッド及びリングバルブの双方
又はいずれか一方が、高温耐摩耗性を有する樹脂材料を
用いて成ることを特徴とする。
As a result of intensive studies to solve the above problems, the present inventor formed a screw head and / or a ring valve using a specific resin, and arranged these members on the screw member. It was found that the above-mentioned problems can be solved by the provision of the above arrangement, and the present invention has been completed. Therefore, the screw member for an injection molding machine of the present invention,
In the screw member used for the injection part of the injection molding machine,
This screw member includes a screw head and a ring valve, and one or both of the screw head and the ring valve are made of a resin material having high-temperature wear resistance.

【0008】以下、本発明のスクリュー部材に配設した
スクリューヘッド及びリングバルブについて説明する。
これらスクリューヘッド及びリングバルブは、金属製の
加熱シリンダ内に設置されており、スクリューヘッドが
リングバルブに挿入された状態で配設されている。
The screw head and ring valve arranged on the screw member of the present invention will be described below.
The screw head and the ring valve are installed in a heating cylinder made of metal, and the screw head is arranged with the screw head inserted in the ring valve.

【0009】射出成形の際、成形材料は、加熱シリンダ
内に充填された後、スクリューヘッドと嵌合しているス
クリューの回転を介してスクリューヘッド及びリングバ
ルブの方に押し出される。次いで、成形材料は、このス
クリューヘッドとリングバルブとのなす間隙を介して前
記加熱シリンダの先端部に一定量押し出され、これによ
り、成形材料の計量を行なう。そして、この計量の後、
前記スクリューを前進させ、成形材料を金型キャビティ
に射出し、射出成形を完了する。この射出の際、リング
バルブの後端部はスクリューの先端部に設けた弁座と当
接し、成形材料が逆流するのを防止する。このように、
リングバルブには、成形材料の流れる方向を制御する機
能がある。従って、加熱シリンダとリングバルブとの間
のクリアランスを所定の大きさに保つ必要がある。
During injection molding, the molding material is filled in the heating cylinder and then extruded toward the screw head and the ring valve through the rotation of the screw fitted to the screw head. Next, the molding material is extruded by a certain amount through the gap formed by the screw head and the ring valve to the tip of the heating cylinder, whereby the molding material is measured. And after this weighing
The screw is advanced, the molding material is injected into the mold cavity, and the injection molding is completed. During this injection, the rear end of the ring valve contacts the valve seat provided at the front end of the screw to prevent the molding material from flowing backward. in this way,
The ring valve has a function of controlling the flow direction of the molding material. Therefore, it is necessary to keep the clearance between the heating cylinder and the ring valve at a predetermined size.

【0010】次に、前記スクリューヘッド及びリングバ
ルブの形成に用いる樹脂について説明する。前述したよ
うに、加熱シリンダとリングバルブとの間のクリアラン
スを所定の大きさに保つ必要がある。そして、一般に、
このクリアランスは約20〜50μmとするのが適当と
されている。従って、加熱シリンダとリングバルブとの
熱膨張係数の差を約50×10-6/℃以下とするのが好
ましい。この結果、金属製の加熱シリンダの熱膨張係数
は約10×10-6であるため、前記樹脂の熱膨張係数は
60×10-6以下であることが好ましい。
Next, the resin used for forming the screw head and the ring valve will be described. As described above, it is necessary to keep the clearance between the heating cylinder and the ring valve at a predetermined size. And in general,
It is appropriate that this clearance is about 20 to 50 μm. Therefore, it is preferable that the difference in coefficient of thermal expansion between the heating cylinder and the ring valve is about 50 × 10 −6 / ° C. or less. As a result, the thermal expansion coefficient of the heating cylinder made of metal is about 10 × 10 −6 , so that the thermal expansion coefficient of the resin is preferably 60 × 10 −6 or less.

【0011】また、前記樹脂の耐熱温度、即ち熱変形温
度は、100℃以上であるのが好ましい。これは、セラ
ミックス製品を射出する際には、溶融成形材料の温度に
加えてリングバルブとスクリューヘッドとの摺動部の局
部摩擦により、発熱温度が100℃以上となることがあ
るからである。その他、前記樹脂は、5kgf/mm2
以上の引張り強さ、150kgf/mm2 〜1500k
gf/mm2 の曲げ弾性率を有するのが好ましい。以上
のような条件を満足する樹脂としては、ポリイミド(P
I)、ポリアミドイミド(PAI)、ポリエーテルエー
テルケトン(PEEK)、ポリサルフォン(PSF)及
びポリアリレート(PAR)等を例示できる。
The heat resistant temperature of the resin, that is, the heat distortion temperature, is preferably 100 ° C. or higher. This is because, when a ceramic product is injected, the heat generation temperature may reach 100 ° C. or higher due to the local friction of the sliding portion between the ring valve and the screw head in addition to the temperature of the molten molding material. In addition, the resin is 5 kgf / mm 2
Or more of tensile strength, 150kgf / mm 2 ~1500k
It preferably has a flexural modulus of gf / mm 2 . As a resin satisfying the above conditions, polyimide (P
I), polyamideimide (PAI), polyetheretherketone (PEEK), polysulfone (PSF), polyarylate (PAR) and the like can be exemplified.

【0012】なお、これら樹脂にガラスファイバーを添
加して材料特性を強化することもできるが、これをリン
グバルブ及び/又はスクリューヘッドに使用すると、前
記摺動部及び加熱シリンダ等がガラスファイバーにより
傷つけられ気密性が低下するので好ましくない。
Glass fibers may be added to these resins to strengthen the material properties. However, when this is used for a ring valve and / or a screw head, the sliding portion and the heating cylinder are damaged by the glass fibers. And airtightness is reduced, which is not preferable.

【0013】[0013]

【実施例】以下、本発明を図面を参照して実施例及び比
較例により説明する。図1に、本発明のスクリュー部材
の一例を示す。このスクリュー部材は、リングバルブ1
0とスクリューヘッド20を備える。このリングバルブ
10は円筒状をなし、先端側に複数の成形材料通過溝1
2を備える。また、前記スクリューヘッド20は、円柱
状のスクリューヘッド本体22の先端側に尖頭部24を
備えている。
EXAMPLES The present invention will be described below with reference to the drawings through examples and comparative examples. FIG. 1 shows an example of the screw member of the present invention. This screw member is a ring valve 1
0 and screw head 20. This ring valve 10 has a cylindrical shape, and a plurality of molding material passage grooves 1 are provided on the tip side.
2 is provided. Further, the screw head 20 is provided with a pointed portion 24 on the tip end side of a cylindrical screw head main body 22.

【0014】図5は、本発明のスクリュー部材を用いた
射出成形機の一例を示す断面図である。同図において、
スクリューヘッド20はリングバルブ10に挿入されて
おり、このスクリューヘッド20は弁座32を介してス
クリュー30と嵌合している。これらバルブ10、ヘッ
ド20及びスクリュー30は、はぼ円筒状の加熱シリン
ダ40内に設置されており、この加熱シリンダ40はバ
ンドヒータ50に包囲されている。そして、加熱シリン
ダ40の後方部にはホッパー60が設けられており、こ
のホッパー60に成形材料が貯蔵されている。成形材料
は、加熱シリンダ40の前方に設置されている成形型7
0に射出される。
FIG. 5 is a sectional view showing an example of an injection molding machine using the screw member of the present invention. In the figure,
The screw head 20 is inserted into the ring valve 10, and the screw head 20 is fitted with the screw 30 via a valve seat 32. The valve 10, the head 20 and the screw 30 are installed in a hollow cylindrical heating cylinder 40, and the heating cylinder 40 is surrounded by a band heater 50. A hopper 60 is provided at the rear of the heating cylinder 40, and the molding material is stored in the hopper 60. The molding material is the molding die 7 installed in front of the heating cylinder 40.
It is ejected to 0.

【0015】図6は、図5の射出成形機の部分断面図で
ある。同図において、リングバルブ10の外周壁部と加
熱シリンダ40の内周壁部とのクリアランスCは、約2
0〜50μmである。射出成形するに当たっては、まず
成形材料の計量を行なう。計量は、図6に示す状態から
スクリュー30及びスクリューヘッド20を図示矢印A
の方向に回転させながら後退させ、加熱シリンダ40に
充填されていた成形材料を図示矢印Bの方向に押し出
し、成形材料の一定量を前記リングバルブ10の成形材
料通過溝12を介して加熱シリンダ40の先端部42に
押し出すことにより行なう(図7参照)。
FIG. 6 is a partial sectional view of the injection molding machine of FIG. In the figure, the clearance C between the outer peripheral wall of the ring valve 10 and the inner peripheral wall of the heating cylinder 40 is about 2
It is 0 to 50 μm. In injection molding, the molding material is first weighed. For the measurement, the screw 30 and the screw head 20 are indicated by the arrow A from the state shown in FIG.
The molding material filled in the heating cylinder 40 is extruded in the direction of the arrow B in the drawing, and a fixed amount of the molding material is passed through the molding material passage groove 12 of the ring valve 10 to rotate the heating cylinder 40. It is carried out by pushing out to the tip portion 42 (see FIG. 7).

【0016】この計量の際、スクリューヘッド20の尖
頭部24の底面部26とリングバルブ10の先端側の頂
部16とは、成形材料の反発力によって押圧される。ま
た、前述のようにスクリュー30及びスクリューヘッド
20は回転駆動するため、前記底面部26と頂部16と
によって摺動面部が構成されることになる。そして、こ
の計量の後に、図8に示すようにスクリュー30を回転
させずに加熱シリンダ40の先端方向に前進させ、一定
量の成形材料を前記成形型70に射出する。この射出の
際、リングバルブ10の後端部18はスクリュー30の
先端部に設けた弁座32と当接し、成形材料が逆流する
のを防止する。このように、リングバルブ10には、成
形材料の流れる方向を制御する機能がある。従って、加
熱シリンダ40とリングバルブ10との間のクリアラン
スCを所定の大きさに保つ必要がある。
During this measurement, the bottom surface portion 26 of the pointed portion 24 of the screw head 20 and the top portion 16 of the ring valve 10 on the tip side are pressed by the repulsive force of the molding material. Since the screw 30 and the screw head 20 are rotationally driven as described above, the bottom surface portion 26 and the top portion 16 form a sliding surface portion. Then, after this measurement, as shown in FIG. 8, the screw 30 is advanced in the direction of the tip of the heating cylinder 40 without rotating, and a certain amount of molding material is injected into the molding die 70. During this injection, the rear end portion 18 of the ring valve 10 contacts the valve seat 32 provided at the front end portion of the screw 30 to prevent the molding material from flowing backward. In this way, the ring valve 10 has a function of controlling the flowing direction of the molding material. Therefore, it is necessary to maintain the clearance C between the heating cylinder 40 and the ring valve 10 at a predetermined size.

【0017】(実施例1〜5及び比較例1)本実施例に
おいては、前記リングバルブ10を特定の樹脂で形成す
るか若しくは前記スクリューヘッド本体22の外周部に
特定樹脂から成る環状部材28を装着し、又はこの双方
を行なうことにより、スクリュー部材を構成した。リン
グバルブ及びスクリューヘッドの材質および適用方法を
表1に示した。
(Examples 1 to 5 and Comparative Example 1) In this example, the ring valve 10 is formed of a specific resin, or an annular member 28 made of a specific resin is provided on the outer peripheral portion of the screw head body 22. The screw member was configured by mounting or both. Table 1 shows the material of the ring valve and the screw head and the application method.

【0018】[0018]

【表1】 [Table 1]

【0019】(性能評価)表1に示した各種バルブ及び
ヘッドにつき以下に示す試験を行ないその性能を評価し
た。即ち、Si34 粉末50容量%とワックス及び樹
脂の混合物50容量%とを混合・混練し、直径4〜8c
m×高さ5〜8cmのペレットを形成した。このペレッ
トを用い、前記各種バルブ及びヘッドを装着した射出成
形機によりセラミックターボチャージャーロータを成形
し、ショット数に対応した摩耗量を測定した。摩耗量
は、各種バルブ及びヘッドの前記頂部16及び底面部2
6を表面粗さ計で測定し、その摩耗の深さとした。図2
〜図4に、これらの結果を示した。
(Performance Evaluation) Various valves and heads shown in Table 1 were subjected to the following tests to evaluate their performance. That is, 50% by volume of Si 3 N 4 powder and 50% by volume of a mixture of wax and resin are mixed and kneaded to have a diameter of 4 to 8 c.
Pellets of m x height 5-8 cm were formed. Using this pellet, a ceramic turbocharger rotor was molded by an injection molding machine equipped with the various valves and heads described above, and the wear amount corresponding to the number of shots was measured. The amount of wear depends on the top 16 and bottom 2 of various valves and heads.
No. 6 was measured with a surface roughness meter, and it was defined as the wear depth. Figure 2
~ Fig. 4 shows these results.

【0020】図4に示すように、比較例1のバルブ及び
ヘッドが双方ともTiCの場合には硬質のTiC同士が
摩擦しあい、双方が均等に摩耗した。この場合、TiC
コート層はショット数に比例して摩耗するが、約500
ショットを超えると急激に摩耗が進行することが分か
る。このことは、TiCコート層が摩耗して無くなり、
母体(地金)金属が摩耗し始めたこと示している。ま
た、TiCコート層の厚みは約8μmであることも分か
る。
As shown in FIG. 4, when both the valve and the head of Comparative Example 1 were made of TiC, the hard TiCs rubbed each other and both were evenly worn. In this case, TiC
The coat layer wears in proportion to the number of shots, but it is about 500
It can be seen that the wear progresses rapidly when the shot is exceeded. This means that the TiC coating layer is worn away and disappears.
It shows that the base metal has started to wear. It can also be seen that the thickness of the TiC coat layer is about 8 μm.

【0021】図2及び図3に示すように、実施例1〜4
では、バルブ又はヘッドのいずれか一方を表1所定の樹
脂材料又はTiCにしたことにより、約2000ショッ
ト後であっても、摩耗量はTiC側で約1μm以下であ
り、樹脂材料側でも約6〜7μmしか摩耗しないことが
分かる。また、実施例6のバルブ及びヘッドの双方とも
樹脂材料を用いた場合も、約2000ショットで約4μ
mしか摩耗しないことが分かる。以上に説明したよう
に、本発明の実施例においては、従来のバルブ及びヘッ
ドの場合に比較して摩耗量を約1/10〜1/20に低
減できることが分かる。
As shown in FIGS. 2 and 3, Examples 1 to 4
Then, since either the valve or the head is made of the resin material or TiC specified in Table 1, the wear amount is about 1 μm or less on the TiC side even after about 2000 shots, and about 6% on the resin material side. It can be seen that only ~ 7 μm wears. In addition, when a resin material is used for both the valve and the head in Example 6, about 4 shots can be obtained in about 2000 shots.
It can be seen that only m is worn. As described above, in the embodiment of the present invention, it is understood that the wear amount can be reduced to about 1/10 to 1/20 as compared with the case of the conventional valve and head.

【0022】以上、本発明を実施例により説明したが、
本発明はこれに限定されるものではなく本発明の要旨の
範囲内で種々の変形が可能である。例えば、リングバル
ブの成形材料通過溝の個数は適宜変更できる。また、本
発明のスクリュー部材は、セラミック製品の製造みなら
ず、粉末冶金等に使用することもできる。
The present invention has been described above with reference to the embodiments.
The present invention is not limited to this, and various modifications can be made within the scope of the gist of the present invention. For example, the number of molding material passage grooves of the ring valve can be appropriately changed. Further, the screw member of the present invention can be used not only for producing ceramic products but also for powder metallurgy and the like.

【0023】[0023]

【発明の効果】以上説明したように、本発明によれば、
特定の樹脂を用いてスクリューヘッド及び/又はリング
バルブを形成し、これら両部材を配設してスクリュー部
材を構成したため、耐熱性、耐摩耗性に優れた射出成形
機用スクリュー部材を提供することがきる。また、樹脂
材料を用いるため、TiC等で被覆するのに比較して製
造コストも低くなる。更に、耐摩耗性が良好であること
より、成形品の不純物不良等を防止でき、良好な成形品
を得ることができる。
As described above, according to the present invention,
A screw head and / or ring valve is formed by using a specific resin, and a screw member is configured by disposing both of these members, thereby providing a screw member for an injection molding machine having excellent heat resistance and wear resistance. I'm dying. Further, since a resin material is used, the manufacturing cost is lower than that of coating with TiC or the like. Further, since the abrasion resistance is good, it is possible to prevent defective impurities in the molded product and obtain a good molded product.

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

【図1】本発明のスクリュー部材の一例を示す斜視図で
ある。
FIG. 1 is a perspective view showing an example of a screw member of the present invention.

【図2】本発明の実施例の耐摩耗性を示す線図である。FIG. 2 is a diagram showing wear resistance of an example of the present invention.

【図3】本発明の実施例の耐摩耗性を示す線図である。FIG. 3 is a diagram showing wear resistance of an example of the present invention.

【図4】従来のリングバルブ及びスクリューヘッドの耐
摩耗性を示す線図である。
FIG. 4 is a diagram showing the wear resistance of a conventional ring valve and screw head.

【図5】本発明のスクリュー部材を用いた射出成形機の
一例を示す断面図である。
FIG. 5 is a sectional view showing an example of an injection molding machine using the screw member of the present invention.

【図6】図5の射出成形機の部分断面図である。6 is a partial cross-sectional view of the injection molding machine of FIG.

【図7】計量の際の図5の射出成形機の部分断面図であ
る。
7 is a partial cross-sectional view of the injection molding machine of FIG. 5 during weighing.

【図8】射出の際の図5の射出成形機の部分断面図であ
る。
8 is a partial cross-sectional view of the injection molding machine of FIG. 5 during injection.

【符号の説明】[Explanation of symbols]

10 リングバルブ 12 成形材料通過溝 16 頂部 20 スクリューヘッド 22 ヘッド本体 24 尖頭部 26 底部 28 環状部材 30 スクリュー 40 加熱シリンダ 50 バンドヒータ 60 ホッパー 70 成形型 10 Ring Valve 12 Molding Material Passage Groove 16 Top 20 Screw Head 22 Head Body 24 Pointed Head 26 Bottom 28 Ring Member 30 Screw 40 Heating Cylinder 50 Band Heater 60 Hopper 70 Mold

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 射出成形機の射出部に用いるスクリュー
部材において、このスクリュー部材はスクリューヘッド
とリングバルブを備え、前記スクリューヘッド及びリン
グバルブの双方又はいずれか一方が、高温耐摩耗性を有
する樹脂材料を用いて成ることを特徴とする射出成形機
用スクリュー部材。
1. A screw member used in an injection part of an injection molding machine, the screw member including a screw head and a ring valve, and one or both of the screw head and the ring valve is a resin having high-temperature wear resistance. A screw member for an injection molding machine, which is made of a material.
【請求項2】 前記樹脂材料が、60×10-6/℃以下
の熱膨張係数及び100℃以上の熱変形温度を有するこ
とを特徴とする請求項1記載のスクリュー部材。
2. The screw member according to claim 1, wherein the resin material has a coefficient of thermal expansion of 60 × 10 −6 / ° C. or less and a thermal deformation temperature of 100 ° C. or more.
JP7715992A 1992-03-31 1992-03-31 Screw member for injection molding machine Withdrawn JPH05278084A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7715992A JPH05278084A (en) 1992-03-31 1992-03-31 Screw member for injection molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7715992A JPH05278084A (en) 1992-03-31 1992-03-31 Screw member for injection molding machine

Publications (1)

Publication Number Publication Date
JPH05278084A true JPH05278084A (en) 1993-10-26

Family

ID=13626019

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7715992A Withdrawn JPH05278084A (en) 1992-03-31 1992-03-31 Screw member for injection molding machine

Country Status (1)

Country Link
JP (1) JPH05278084A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012533443A (en) * 2009-07-17 2012-12-27 フラウンホーファー−ゲゼルシャフト ツア フォーデルング デア アンゲヴァンテン フォルシュング エー.ファオ. Apparatus for producing plastic molded parts and use thereof
KR102215694B1 (en) * 2020-09-16 2021-02-16 류진영 Rubber products molding apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012533443A (en) * 2009-07-17 2012-12-27 フラウンホーファー−ゲゼルシャフト ツア フォーデルング デア アンゲヴァンテン フォルシュング エー.ファオ. Apparatus for producing plastic molded parts and use thereof
KR102215694B1 (en) * 2020-09-16 2021-02-16 류진영 Rubber products molding apparatus

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