JPH03187718A - Manufacture of composite article - Google Patents
Manufacture of composite articleInfo
- Publication number
- JPH03187718A JPH03187718A JP32583589A JP32583589A JPH03187718A JP H03187718 A JPH03187718 A JP H03187718A JP 32583589 A JP32583589 A JP 32583589A JP 32583589 A JP32583589 A JP 32583589A JP H03187718 A JPH03187718 A JP H03187718A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molding
- molds
- molded product
- product body
- 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.)
- Pending
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000000465 moulding Methods 0.000 claims abstract description 61
- 239000004033 plastic Substances 0.000 claims abstract description 20
- 229920003023 plastic Polymers 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000003566 sealing material Substances 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000001746 injection moulding Methods 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 6
- 239000000565 sealant Substances 0.000 claims description 4
- 239000013013 elastic material Substances 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract description 15
- 239000007924 injection Substances 0.000 abstract description 15
- 229920005989 resin Polymers 0.000 abstract description 12
- 239000011347 resin Substances 0.000 abstract description 12
- 239000000243 solution Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 238000010137 moulding (plastic) Methods 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- -1 FA-6 and PA-66 Polymers 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 241000785681 Sander vitreus Species 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
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物本体と弾性シール材の一体
化された複合物品の製造方法に係り、特に通常の射出成
形機に簡単な改良を施すのみで、従来、高価な専用成形
機でしか製造し得なかった複合物品を簡単に成形し得る
複合物品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 for manufacturing a composite article in which a plastic molded body and an elastic sealing material are integrated, and in particular, a method for manufacturing a composite article in which a general injection molding machine is simply improved. The present invention relates to a method for manufacturing a composite article that can easily mold a composite article that could conventionally only be manufactured using an expensive dedicated molding machine.
本発明における複合物品とはプラスチック成形物本体と
弾性シール材が複合一体化された物品をいい、具体的に
はシリンダーヘッドカバー、タイミングベルトカバー、
ラジェターコア、ヘッドランプハウジング、テールラン
プカバー等の自動車関連の樹脂部品、ワイヤーハーネス
、防水ワレーインヒビタースイック等の電装品部品、人
工透析器、哺乳ビン等の医療器機、ランチボックス、各
種容器等の日用品、防水ラジオ、防水スピーカー回転子
トリマー、フロッピーハウジンク等の電気、電子部品、
水道メーターカバー等の計器部品等であって、その適応
範囲は非常に広い、その他ゴムの特性を生かしたすべり
止めや、スペーサー、クツション材を目的とした用途の
部品等、その応用範囲はさらに広いものがある。これら
複合物品の製造は通常、ダブルインジェクション成形法
による。The composite article in the present invention refers to an article in which a plastic molded body and an elastic sealing material are integrated into a composite body, and specifically includes a cylinder head cover, a timing belt cover,
Automobile-related resin parts such as radiator cores, headlamp housings, and tail lamp covers; electrical components such as wire harnesses and waterproof walleye inhibitor switches; medical devices such as dialysis machines and baby bottles; daily necessities such as lunch boxes and various containers. , waterproof radios, waterproof speaker rotor trimmers, floppy housings, and other electrical and electronic components;
The range of application is very wide, such as instrument parts such as water meter covers, and the range of application is even wider, such as parts for use as anti-slip parts that take advantage of the characteristics of rubber, spacers, and cushioning materials. There is something. Manufacture of these composite articles is typically by double injection molding.
〔従来の技術〕
ダブルインジェクション成形法によってプラスチック成
形物本体と弾性シール材が一体化した複合成形品を製造
する方法として、従来、特公昭６３−４５２９２号に示
されるように金型を置き換えることによって作る方法が
提唱されている。また、特開昭６３−１０４８０９号公
報ではコアバック方式により、弾性樹脂に熱硬化性樹脂
を用いる方法が示されている。[Prior Art] Conventionally, as a method for manufacturing a composite molded product in which a plastic molded body and an elastic sealing material are integrated by double injection molding, the method is as shown in Japanese Patent Publication No. 63-45292 by replacing the mold. A method of making it is proposed. Further, Japanese Patent Application Laid-Open No. 104809/1983 discloses a method using a thermosetting resin as the elastic resin by a core-back method.
これら公知の成形方法はいずれも通常の射出成形方法を
基本としており、これらの成形を行うためには射出筒を
２本備えた専用の射出成形機が必要になる。この専用の
射出成形機は２本の射出筒を動かすために油圧系路も、
電機系路も射出筒のベツドも通常の一次のみの射出成形
機に比べて複雑なものになる。All of these known molding methods are based on normal injection molding methods, and in order to perform these moldings, a dedicated injection molding machine equipped with two injection cylinders is required. This special injection molding machine also has a hydraulic system to move the two injection cylinders.
Both the electrical system and the bed of the injection tube are more complex than in a normal injection molding machine that only has one primary injection molding machine.
このため、通常の射出成形機を複合物品成形用に改良し
て使うことは実際問題として不可能に近い。Therefore, as a practical matter, it is almost impossible to modify and use a conventional injection molding machine for molding composite articles.
ところが、実用面からは従来からある通常の射出成形機
をそのまま生かして、改良することによって複合物品を
成形したいというユーザーニーズは非常に強いものがあ
る。However, from a practical standpoint, there is a very strong user need to mold composite articles by making use of conventional injection molding machines as they are and improving them.
特に大型の成形品になればなるほど現有設備のコストも
高価で、新たに専用機を購入しようとするとそのイニシ
ャルコストは莫大なものとなる。In particular, the larger the molded product, the more expensive the existing equipment is, and the initial cost of purchasing a new dedicated machine will be enormous.
そこで、本発明の目的は通常の射出成形機に簡単な改良
を施すのみで、従来、高価な専用成形機でしか製造し得
なかった複合物品を簡単に成形し得る複合物品の製造方
法を提供することにある。Therefore, an object of the present invention is to provide a method for manufacturing a composite article that can easily mold a composite article that could conventionally only be manufactured using an expensive dedicated molding machine by simply making improvements to a conventional injection molding machine. It's about doing.
前述の目的を達成するため、本発明によれば、通常の射
出成形機の一対の金型のうちどちらか一方をスライド型
とし、このスライド型と対向の金型とを組み合わせて一
次成形用一対の金型を構成し、この一対の金型を用いて
プラスチック成形物本体を成形し、次いでこの成形物本
体を金型内に保持したまま型開きし、前記スライド型を
スライドさせて前記成形物本体を保持した金型と対向の
他の金型とを組み合わせて前記成形物本体のシール面に
成形キャビティを形成する二次成形用一対の金型を構成
し、この成形キャビティ内に金型パーティングラインを
通して弾性シール材液を注入硬化させてプラスチック成
形物本体と弾性シール材の一体化された複合物品を成形
することを特徴とする。In order to achieve the above-mentioned object, according to the present invention, one of a pair of molds of an ordinary injection molding machine is a slide mold, and this slide mold and the opposite mold are combined to form a pair of molds for primary molding. This pair of molds is used to mold a plastic molded product body, and then the mold is opened while the molded product body is held in the mold, and the slide mold is slid to mold the plastic molded product body. A pair of molds for secondary molding is formed by combining the mold holding the main body and another mold opposite to each other to form a molding cavity on the sealing surface of the molded product body, and a mold part is placed in this molding cavity. The method is characterized in that an elastic sealant liquid is injected and cured through a sealing line to form a composite article in which a plastic molded body and an elastic sealant are integrated.
以下、本発明を添付図面を用いて詳述する。Hereinafter, the present invention will be explained in detail using the accompanying drawings.
第１図は本発明に用いられる射出成形機の平面図であっ
て、可動盤側金型１と固定盤側金型２との一対の金型を
有し、さらに金型パーティングライン３を通して金型の
キャビティ内に弾性シール材液を注入する二次射出ユニ
ット４を有している。FIG. 1 is a plan view of an injection molding machine used in the present invention, which has a pair of molds, a movable plate side mold 1 and a fixed plate side mold 2, and further includes a mold parting line 3. It has a secondary injection unit 4 for injecting an elastic sealant liquid into the cavity of the mold.
５は一次射出ユニット、６は型締用油圧シリンダである
。5 is a primary injection unit, and 6 is a hydraulic cylinder for mold clamping.
第２図は本発明射出成形機の金型部分の一具体例の断面
図を示す。これは固定盤側金型２をスライド型とした例
であって、可動盤側金型１と、固定盤側金型２を含む。FIG. 2 shows a sectional view of a specific example of the mold part of the injection molding machine of the present invention. This is an example in which the fixed plate side mold 2 is a sliding type, and includes a movable plate side mold 1 and a fixed plate side mold 2.
可動盤側金型１は共通型であって、金型取付盤７ａに取
り付けられ、成形すべきプラスチック成形物本体８の成
形キャビティ９を有している。固定盤側金型２はスライ
ド型であって、一次成形金型２ａ詔よび二次成形金具２
ｂからなり、金型取付盤７ｂに取付けられて、金型スラ
イド用シリンダ１０によってスライドされる。The movable plate side mold 1 is a common mold, is attached to a mold mounting plate 7a, and has a molding cavity 9 for a plastic molded body 8 to be molded. The fixed plate side mold 2 is a slide type, and includes a primary molding mold 2a and a secondary molding metal fitting 2.
b, is attached to the mold mounting board 7b, and is slid by the mold sliding cylinder 10.
金型取付盤７ｂには、入口にゲートリング１１を有する
スプールプツシ５１２が備えられ、このゲートリング１
１からスプールブツシュ１２および一次成形ゲートロ１
３を通して成形キャビティ９に通じるようになっている
。プラスチック成形物本体８は一次成形金型２ａを用い
、プラスチック成形物本体の材料をゲートリング１１か
らスプールブツシュ１２および一次成形ゲートロ１３を
通して成形キャビティ９に注入硬化することにより成形
される。The mold mounting board 7b is equipped with a spool pusher 512 having a gate ring 11 at its entrance.
1 to spool bush 12 and primary forming gatero 1
3 to the molding cavity 9. The plastic molded body 8 is molded by injecting and hardening the material of the plastic molded body from the gate ring 11 into the molding cavity 9 through the spool bush 12 and the primary molding gate 13 using the primary molding die 2a.
次いで、共通型１にプラスチック成形物本体８を保持し
たまま型開きし、スライド型２を金型スライド用シリン
ダ１０により、一次成形金型２ａから二次成形金型２ｂ
にスライドさせて、共通型１と二次成形金型２ｂとを組
み合わせ、第２図および第３図に示されるように、プラ
スチック成形物本体８のシール面１４に成形キャビティ
１５を形成し、このキャビティ１５内に二次射出ユニッ
ト４から金型パーティングライン３を通して弾性シール
材液１６を注入硬化させ、プラスチック成形物本体８と
、弾性シール材１７の一体化された複合物品を得る。Next, the common mold 1 is opened while holding the plastic molded product body 8, and the slide mold 2 is moved from the primary molding mold 2a to the secondary molding mold 2b by the mold sliding cylinder 10.
By sliding the common mold 1 and the secondary molding mold 2b together, as shown in FIGS. 2 and 3, a molding cavity 15 is formed on the sealing surface 14 of the plastic molding body 8. An elastic sealing material liquid 16 is injected into the cavity 15 from the secondary injection unit 4 through the mold parting line 3 and hardened to obtain a composite article in which the plastic molded body 8 and the elastic sealing material 17 are integrated.
第２図では、スライド方向と射出方向が同方向の例を示
したが、直交であってもかまわない。むしろ、直交して
スライド方向が上下、射出は側面からの方が全体のおさ
まりはよい。Although FIG. 2 shows an example in which the sliding direction and the ejection direction are the same, they may be perpendicular to each other. Rather, the overall control is better if the slide directions are perpendicular to each other, up and down, and the injection is from the side.
一次側の樹脂はＰＰ、ＰＢＴ、ＰＣ％ＡＢＳ。The primary resin is PP, PBT, PC%ABS.
ＦＡ−６、ＰＡ−６６等の熱可塑性樹脂、エポキシ、フ
ェノール等の熱硬化性樹脂等射出成形できるプラスチッ
ク材料であればいずれも用いることができる。二次側の
材料はシリコーン、ウレタン、塩ビ、オレフィン等、硬
化して弾性体となり射出成形できるものであればいずれ
でもよい。また、二次成形シール材樹脂を注入する方式
はスクリュー方式でも、プランジャ一方式でもいずれで
もよい。Any plastic material that can be injection molded can be used, such as thermoplastic resins such as FA-6 and PA-66, and thermosetting resins such as epoxy and phenol. The material for the secondary side may be any material such as silicone, urethane, vinyl chloride, olefin, etc., as long as it hardens to become an elastic body and can be injection molded. Further, the method for injecting the secondary molded sealing material resin may be either a screw method or a plunger one-way method.
通常の成形機としては必ずしも横型である必要はなく、
縦型であってもよい。また、スライド型を固定側、可動
側いずれに設けるかも都合によって自由に選択してよい
。A normal molding machine does not necessarily have to be horizontal;
It may be vertical. Furthermore, whether the slide mold is provided on the fixed side or the movable side may be freely selected depending on convenience.
第２図を用いて本発明作用を説明すると、まず可動盤側
金型ｌと固定盤側の一次成形金型２ａが型締され、一次
の成形キャビティ９に一次成形樹脂を射出し、硬化させ
る。その後、型開きして一次成形金型２ａをスライドさ
せ、固定盤側の二次成形金型２ｂと型締するとプラスチ
ック成形物本体８のシール面１４、二次成形金型２ｂの
間に二次の成形キャビティ１５が形成される。このとき
、金型パーティングライン３上に図示しないが、二次成
形ゲート口とノズルタッチ部も形成される。ノズルタッ
チ部に二次射出ユニット４が前進し二次射出ユニット４
のノズル部がタッチして、二次成形樹脂が射出される。To explain the operation of the present invention using FIG. 2, first, the movable platen side mold l and the fixed platen side primary molding mold 2a are clamped, and the primary molding resin is injected into the primary molding cavity 9 and hardened. . After that, when the mold is opened and the primary molding die 2a is slid, and the mold is clamped with the secondary molding die 2b on the fixed platen side, the secondary molding die 2a is formed between the sealing surface 14 of the plastic molding body 8 and the secondary molding die 2b. A molding cavity 15 is formed. At this time, although not shown, a secondary molding gate opening and a nozzle touch portion are also formed on the mold parting line 3. The secondary injection unit 4 moves forward to the nozzle touch part and the secondary injection unit 4
When the nozzle part of is touched, the secondary molding resin is injected.
二次成形樹脂が硬化した後、型開きして製品がインジェ
クトされ、二次成形金型がスライドされる。After the secondary molding resin has hardened, the mold is opened, the product is injected, and the secondary molding mold is slid.
第４図は上述によって成形された複合物品の一具体例で
あって、プラスチック成形物本体８のシール面１４に弾
性シール材１７が一体的に成形された丸フランジである
。１８はボルト穴、１９は一次成形金型２ａの個所、２
０は二次成形を行った金型パーティングラインの個所で
ある。FIG. 4 shows a specific example of the composite article molded as described above, which is a round flange in which an elastic sealing material 17 is integrally molded on the sealing surface 14 of the plastic molded body 8. 18 is a bolt hole, 19 is a location of the primary molding die 2a, 2
0 is the parting line of the mold where the secondary molding was performed.
この成形方法によって、従来高価な専用成形機でしか作
れなかった複合成形物品が、簡単な二次側成形機のみを
従来からある通常の射出成形機に取付けて、スライド機
構の付いた金型を用いるだけで、簡単に成形できるよう
になった。特に、大型の成形品を回転方式の専用機で作
ろうとすると非常に大きなグイプレートを有した成形機
が必要になるが、本発明によれば従来と同じグイプレー
トの大きさですむ。With this molding method, composite molded articles that could previously only be made using expensive dedicated molding machines can now be produced by attaching only a simple secondary molding machine to a conventional ordinary injection molding machine and creating a mold with a sliding mechanism. It can now be easily molded just by using it. In particular, if a large molded product is to be made using a dedicated rotary machine, a molding machine with a very large goo plate is required, but according to the present invention, the goo plate can be of the same size as the conventional one.
第１図は本発明に用いられる射出成形機の一具体例の平
面図であり、第２図は本発明成形機の金型部分の一員体
例の断面図であり、第３図は二次側射出状態の金型断面
図を示し、第４図は本発明方法によって製造された複合
物品の一例を表した斜視図である。
１・・・可動盤側金型（共通型）、
２・・・固定錠型金型（スライド型）、３・・・金型パ
ーティングライン、
４・・・二次射出ユニット、
８・・・プラスチック成形物本体、
９．１５・・・成形キャビティ、
１４・・・シール面、 １６・・・弾性シール材液、１
７・・・弾性シール材。FIG. 1 is a plan view of a specific example of an injection molding machine used in the present invention, FIG. 2 is a sectional view of an example of an integral part of the mold part of the molding machine of the present invention, and FIG. 3 is a secondary side A sectional view of the mold in an injection state is shown, and FIG. 4 is a perspective view showing an example of a composite article manufactured by the method of the present invention. 1...Movable platen side mold (common type), 2...Fixed lock mold (slide type), 3...Mold parting line, 4...Secondary injection unit, 8...・Plastic molded product body, 9.15...Molding cavity, 14...Sealing surface, 16...Elastic sealing material liquid, 1
7...Elastic sealing material.
Claims (2)
方をスライド型とし、このスライド型と対向の金型とを
組み合わせて一次成形用一対の金型を構成し、この一対
の金型を用いてプラスチック成形物本体を成形し、次い
でこの成形物本体を金型内に保持したまま型開きし、前
記スライド型をスライドさせて前記成形物本体を保持し
た金型と対向の他の金型とを組み合わせて前記成形物本
体のシール面に成形キャビティを形成する二次成形用一
対の金型を構成し、この成形キャビティ内に金型パーテ
ィングラインを通して弾性シール材液を注入硬化させて
プラスチック成形物本体と弾性シール材の一体化された
複合物品を成形することを特徴とする複合物品の製造方
法。(1) Either one of a pair of molds of a normal injection molding machine is a slide mold, and this slide mold and the opposite mold are combined to constitute a pair of molds for primary molding, and this pair of molds is A plastic molded product body is molded using a mold, and then the mold is opened while the molded product body is held in the mold, and the slide mold is slid to create another mold opposite to the molded product body that held the molded product body. A pair of molds for secondary molding is formed in combination with the mold to form a molding cavity on the sealing surface of the molded product body, and an elastic sealing material liquid is injected and hardened into the molding cavity through the mold parting line. A method for manufacturing a composite article, comprising molding a composite article in which a plastic molded body and an elastic sealant are integrated.
射出成形機の共通型としての可動盤側金型と、一次およ
び二次成形金型としての固定盤側金型との一対の金型の
うち、固定盤側金型をスライド型とし、このスライド型
の一次成形金型でプラスチック成形物本体を成形し、次
いで共通型に前記プラスチック成形物本体を保持したま
ま型開きし、前記スライド型をスライドさせて前記成形
物本体を保持した共通型と二次成形金型とを組み合わせ
て前記成形物本体のシール面に成形キャビティを形成し
、このキャビティ内に金型パーティングラインを通して
弾性シール材液を注入硬化させ、これによりプラスチッ
ク成形物本体と弾性シール材の一体化された複合物品を
成形することを特徴とする複合物品の製造方法。(2) In the manufacturing method according to claim 1, a pair of movable plate side molds as a common mold of a normal injection molding machine and fixed plate side molds as primary and secondary molds. Of the molds, the stationary plate side mold is a slide mold, and the primary molding mold of the slide type is used to mold the plastic molded product body, and then the mold is opened while holding the plastic molded product body in the common mold, and the A common mold holding the molded product body by sliding a slide mold and a secondary mold are combined to form a molding cavity on the sealing surface of the molded product body, and an elastic material is passed through the mold parting line into this cavity. A method for manufacturing a composite article, which comprises injecting and curing a sealing material liquid, thereby molding a composite article in which a plastic molded body and an elastic sealing material are integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32583589A JPH03187718A (en) | 1989-12-18 | 1989-12-18 | Manufacture of composite article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32583589A JPH03187718A (en) | 1989-12-18 | 1989-12-18 | Manufacture of composite article |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03187718A true JPH03187718A (en) | 1991-08-15 |
Family
ID=18181144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32583589A Pending JPH03187718A (en) | 1989-12-18 | 1989-12-18 | Manufacture of composite article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03187718A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05169491A (en) * | 1991-12-19 | 1993-07-09 | Koito Mfg Co Ltd | Manufacturing method and apparatus of lamp body brim rubber |
| JP4669570B1 (en) * | 2010-06-02 | 2011-04-13 | 工立化成株式会社 | Method for manufacturing casing provided with sealing member |
| CN103950163A (en) * | 2014-04-30 | 2014-07-30 | 昆山长运电子工业有限公司 | Plastic mold suitable for combination of magnesium part and plastic part |
-
1989
- 1989-12-18 JP JP32583589A patent/JPH03187718A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05169491A (en) * | 1991-12-19 | 1993-07-09 | Koito Mfg Co Ltd | Manufacturing method and apparatus of lamp body brim rubber |
| JP4669570B1 (en) * | 2010-06-02 | 2011-04-13 | 工立化成株式会社 | Method for manufacturing casing provided with sealing member |
| JP2011251478A (en) * | 2010-06-02 | 2011-12-15 | Koritsu Kasei Kk | Method for manufacturing housing having seal member |
| CN103950163A (en) * | 2014-04-30 | 2014-07-30 | 昆山长运电子工业有限公司 | Plastic mold suitable for combination of magnesium part and plastic part |
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