2つのリアクターを並列または直列に使用する

There are two templates on the 射出成形機, 片方は動いていない, 固定テンプレートと呼ばれる; もう一方は移動できます, 移動テンプレートと呼ばれる. 金型は2枚の型板にそれぞれネジと押さえ板で固定されています. 型を開けたとき, 射出成形機の可動テンプレートが動きます, それによって金型が開くように駆動します.

その後 もう1つは、材料の加熱プロセス中に発生するさまざまなガスを除去することです。 is manufactured, it is necessary to carry out injection molding, put on the injection molding machine, and start to produce products. しかし, there are many models of injection molding machines, and each injection molding machine has its own parameters. The design mold must be able to meet the requirements of the injection molding machine model provided by the customer, otherwise it will not be able to produce. に

There are many design parameters 射出成形機の. The following will focus on several parameters related to the mold. I hope that readers will pay attention to the specific design of the mold. に

1. Injection volume
The injection volume is the maximum mass value (or volume value) that the injection molding machine can shoot at one time during production, and represents the maximum injection capacity of this type of injection molding machine. The amount of melt used in the designed mold is less than the injection volume of the injection molding machine. Otherwise, the product is dissatisfied and cannot be produced. に

2. 締付力
What happened was the pressing force of the injection molding machine on the template when the mold was closed. The clamping force required for the molded product during molding must be less than the rated clamping force of the selected injection molding machine. Otherwise, the molten glue will easily run off the parting surface, resulting in flash.

3. Tie rod spacing
There are four tie rods in the dead corners of the fixed template and the movable template of the injection molding machine. Their function is to ensure that the injection molding machine has sufficient strength and rigidity, and at the same time is responsible for the sliding template. しかし, it tends to limit the overall dimensions of the mold, because the mold is hoisted in from the middle of the tie rod during installation. に

The dimensions of the mold cannot be larger than the distance between the tie rods. If the length of the mold exceeds the distance between the tie rods, check whether the mold is hoisted into the rod workshop by rotating. If the rotary hoisting cannot be carried out, then the mold size can only be changed. , Or replace the injection molding machine. に

4. Nozzle size check
The nozzle head of the injection molding machine is generally spherical. When selecting the sprue sleeve, the spherical radius of the sprue sleeve should be consistent with the spherical radius of the nozzle. In order to prevent the high-pressure melt from overflowing from the contact gap between the nozzle and the sprue sleeve, the spherical radius of the sprue sleeve should generally be larger than the nozzle radius. 同時に, the size of the small end of the main runner should also be slightly larger than the size of the nozzle hole. Easy to align the muzzle

The design of the gating system is an important part of the design of the injection mold. It has a direct impact on the injection molding cycle and the quality of the plastic parts (such as appearance, physical properties, 寸法精度, NS。).

The following principles must be followed when designing
(1) The cavity layout and gate opening position should be symmetrical to prevent the mold from being subjected to unbalanced load and causing flashing.
(2) The arrangement of cavities and gates should reduce the overall dimensions of the mold as much as possible.
(3) The system flow channel should be as short as possible, and the cross-sectional size should be appropriate (too small, the pressure and heat loss will be large, and too large, the plastic consumption will be large); minimize the bending, and the surface roughness should be low to make the heat and pressure loss As small as possible.
(4) For multiple cavities, the plastic melt should enter the depths and corners of each cavity at the same time as much as possible, あれは, the runners should be arranged in a balanced manner as much as possible
(5) On the premise that the cavity is full, the volume of the pouring system should be as small as possible to reduce the consumption of plastic.
(6) The gate position should be appropriate, try to avoid impacting the insert and the small core to prevent the core from deforming. The residual marks of the gate should not affect the appearance of the plastic part.

Five hazards of high temperature of 射出成形機
射出成形機の過度の温度上昇による5大危険は次のとおりです。: 機械の熱変形, オイル粘度の低下, ゴムパッキンの変形, オイルの酸化と劣化が促進される, 空気成分圧力の低下.

危険の一つ: 機械の熱変形
The moving parts with different coefficients of thermal expansion in the hydraulic components are stuck due to their smaller fits, 故障の原因となる, 油圧システムの伝達精度に影響を与える, 部品の動作品質の低下.

害2: オイルの粘度を下げる
射出成形機の温度が過度に上昇すると、オイルの粘度が低下します。, 漏れを増やす, ポンプの体積効率とシステム全体の効率が大幅に低下します。. オイルの粘度が下がると, スライドバルブ等の可動部の油膜が薄くなり切れる, and the friction resistance increases, 摩耗が増加する.

危険 3: ゴムパッキンの変形
射出成形機の温度が過度に上昇するとゴムシールが変形します。, 老化の失敗を加速させる, シール性能と耐用年数が低下します, そして漏れの原因になる.

危険 4: 油の酸化・劣化を促進する
射出成形機の温度が過度に上昇すると、オイルの酸化・劣化が促進されます。, アスファルト物質を沈殿させる, 作動油の寿命が短くなります. 析出物がダンピングオリフィスとスリットバルブポートを詰まらせる, 圧力バルブが固着して動かなくなる, 金属パイプは伸びたり曲がったりします, あるいは破裂したりもする.

危険 5: 部品の作業品質の低下につながる
Excessive temperature rise of the 射出成形機 will result in poor working quality of the parts, and the dissolved air in the oil will escape, エアポケットが発生する, 油圧システムの動作パフォーマンスが低下します。. 油圧システムの理想的な動作温度は、 45 度と 50 度. その理由は、油圧システムが選択された圧油粘度に従って設計されているためです。, しかし、粘度は油温によって変化します, システム内の作業に影響します. コンポーネント, オイルシリンダーなど, 油圧バルブ, NS。, 制御精度と応答感度を下げる, 特に精密射出成形機の場合.

同時に, if the 温度 高すぎる, シールの経年劣化を加速し、硬化して亀裂を生じさせます; 温度が低すぎる場合, 処理エネルギーが消費され、動作速度が低下します. したがって, 油圧オイルの作動温度に細心の注意を払う必要があります. 油温が高い理由はたくさんあります, しかし、それらのほとんどは、オイル回路の故障または冷却システムの故障によるものです.

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