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山東模具:注塑模具的內部你了解嗎?

刮刮乐2000 www.yfrmbf.com.cn 來源:    發布時間:2019-06-17 17:59:16    點擊:

  模具的構造固然由于塑料種類和性能、塑料制品的外形和構造以及注射機的類型等不同而可能千變萬化,但是根本構造是分歧的。模具主要由澆注系統、調溫系統、成型零件和構造零件組成。其中澆注系統和成型零件是與塑料直接接觸局部,并隨塑料和制品而變化,是塑模中比較復雜,變化比較大,請求加工光亮度和精度比較高的局部。
  Although the structure of moulds may vary greatly due to the different types and properties of plastics, the shape and structure of plastics products and the types of injection machines, the fundamental structure is different. The die is mainly composed of pouring system, temperature regulating system, forming parts and structural parts. Among them, the casting system and the moulding parts are directly in contact with the plastics, and change with the plastics and products. They are the most complex parts in the moulds, which require the highest processing brightness and accuracy.
  1、澆注系統
  1. Gating system
  澆注系統是指塑料從射嘴進入型腔前的流道局部,包括主流道、冷料穴、分流道和澆口等。
  The gating system refers to the part of the runner before the plastic enters the cavity from the nozzle, including the main runner, the cold material hole, the shunt runner and the gate, etc.
  澆注系統又稱流道系統,它是將塑料熔體由注射機噴嘴引向型腔的一組進料通道,通常由主流道、分流道、澆口和冷料穴組成。它直接關系到塑料制品的成型質量和消費效率。
  Gating system, also known as runner system, is a group of feeding channels that lead plastic melt from injector nozzle to cavity, usually composed of main runner, shunt runner, gate and cold hole. It is directly related to the forming quality and consumption efficiency of plastic products.
  2、主流道
  2. Main Street
  它是模具中銜接注塑機射嘴至分流道或型腔的一段通道。主流道頂部呈凹形以便與噴嘴銜接。主流道進口直徑應略大于噴嘴直徑(0.8mm)以防止溢料,并避免兩者因銜接不準而發作的堵截。進口直徑依據制品大小而定,普通為4-8mm。主流道直徑應向內擴展呈3°到5°的角度,以便流道贅物的脫模。
  It is a passage connecting the injection moulding machine nozzle to the shunt channel or cavity in the mould. The top of the main channel is concave to connect with the nozzle. The inlet diameter of the main channel should be slightly larger than that of the nozzle (0.8mm) to prevent spills and to avoid blocking due to improper connection between the two. Import diameter depends on the size of the product, usually 4-8 mm. The diameter of the main passage should be extended inward at an angle of 3 to 5 degrees in order to release the excess of the passage.
山東模具
  3、冷料穴
  3. Cold Material Points
  它是設在主流道末端的一個空穴,用以捕集射嘴端部兩次注射之間所產生的冷料,從而避免分流道或澆口的梗塞。假如冷料一旦混入型腔,則所制制品中就容易產生內應力。冷料穴的直徑約8-10mm,深度為6mm。為了便于脫模,其底部常由脫模桿承當。脫模桿的頂部宜設計成迂回鉤形或設下陷溝槽,以便脫模時能順利拉出主流道贅物。
  It is a hole located at the end of the main channel to trap the cold material produced between the two injections at the end of the nozzle, thus avoiding the obstruction of the diversion channel or gate. If the cold material is mixed into the cavity, the internal stress will easily occur in the product. The diameter of the cold material hole is about 8-10 mm and the depth is 6 mm. In order to facilitate demoulding, the bottom of the demoulding rod is usually supported by the demoulding rod. The top of the demoulding rod should be designed as a circuitous hook or a sinking groove, so as to pull out the main stream of redundancy smoothly when demoulding.
  4、分流道
  4. Shunt Channel
  它是多槽模中銜接主流道和各個型腔的通道。為使熔料以等速度充溢各型腔,分流道在塑模上的排列應成對稱和等間隔散布。分流道截面的外形和尺寸對塑料熔體的活動、制品脫模和模具制造的難易都有影響。
  It is the channel connecting the main channel and each cavity in the multi-groove die. In order to make the melt fill the cavity at the same speed, the shunts should be arranged symmetrically and dispersed at equal intervals on the plastic mould. The shape and size of the shunt section have an effect on the activity of the plastic melt, the demoulding of the products and the manufacturing of the die.
  假如按相等料量的活動來說,則以圓形截面的流道阻力比較小。但因圓柱形流道的比外表小,對分流道贅物的冷卻不利,而且這種分流道必需開設在兩半模上,既費工又不易對準。
  If the flow resistance of the circular section is the smallest according to the activity of the same amount of material. However, because the cylindrical channel is smaller than the external surface, it is not conducive to cooling of the diversion channel, and the diversion channel must be set on the two-half die, which is labor-intensive and difficult to align.
  因而,經常采用的是梯形或半圓形截面的分流道,且開設在帶有脫模桿的一半模具上。流道外表必需拋光以減少活動阻力提供較快的充模速度。流道的尺寸決議于塑料種類,制品的尺寸和厚度。對大多數熱塑性塑料來說,分流道截面寬度均不超越8m,特大的可達10-12m,特小的2-3m。在滿足需求的前提下應盡量減小截面積,以增加分流道贅物和延長冷卻時間。
  As a result, trapezoidal or semi-circular cross-section dividers are often used, and they are arranged on half of the die with a demoulding rod. The runner surface must be polished to reduce moving resistance and provide faster filling speed. The size of the runner depends on the type of plastic, the size and thickness of the product. For most thermoplastics, the cross-section width of the shunt is not more than 8m, the super-large can reach 10-12m, and the super-small can reach 2-3m. On the premise of meeting the demand, the section area should be reduced as far as possible to increase the shunt redundancy and prolong the cooling time.
  刮刮乐2000:注塑模具的內部您現在了解嗎,如果您有購買山東模具的需求,歡迎來電咨詢,我們的網站是//www.yfrmbf.com.cn
  Shandong Mould: Do you know the inside of injection mould now? If you have the need to buy Shandong Mould, please call us for consultation. Our website is //www.yfrmbf.com.cn.
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