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肥皂盒注塑模具設計畢業(yè)設計論文-文庫吧資料

2025-06-10 00:43本頁面
  

【正文】 d Design Plastic industry is an industry of rapid development in the world today is among the few one of billions of dollars in industrial production. Plastic products in daily life provides great convenience for people, including soap box is almost essential supplies. This paper designed a soap box, have waterproof function, can effectively protect the soap does not get wet by water, prolong the service life of the soap. Injection mold forming method because of its high efficiency, high precision, low cost of producing a variety of products with plex shape, is the importance of plastic products production means. However, facing the globalization market petition, the plastics industry is faced with great pressure. In order to shorten product design cycle, improve product quality, will all kinds of advanced production mode is used in the design of the injection mould is the trend of The Times, such as CAD/CAM/CAE integration technique. This paper can be seen from the diagram, the plastic pieces belong to the thin walled cavity products, projection area of the highest plane for the box of the plane, so the parting surface should be selected in the soap box holds the biggest projective planes. Cavity number for one module and four cavities, gate in the bottom of the box edge, USES the gate. According to the structure of plastic parts and mould, selection of mold for the two templates. Set the channel 8 mm diameter, the distance from plastic parts for around 10 mm, thimble and insert the minimum distance of 8 mm. Move set mold cooling alone, mold cooling water flow driven template into, after flowing through the core driven templates, template Between the core and equipped with rubber gaskets to prevent leakage, mold parts and dynamic model. The plunger diameter is 8 millimeter, each cavity has four. Installed at the bottom of the core of the mainstream way to pull rod material, diameter of 8 mm. Thimble and pull rod and the mold cavity. According to the characteristics of the plastic parts, the whole embedded mold. Considering the distribution of cooling water channel and template of the screw hole, guide pin, guide sleeve, etc., to estimate the mould size horizontal plane projection, find out similar die set from the standard. This die set on the basis of LKM gate mould frame, the die set The determination of the specific parameters such as table mold cavity The determination of the most economic cavity number is essentially plastic pieces of economic accounting of the cost of production. but In the initial stage in injection molding design, technical parameters such as pouring system is unknown, this cavity 肥皂盒注塑模具設計 29 Is a kind of estimate forecast, establishing thumb first assumed that after pletion of the mold design, e in Cost accounting. Therefore, carries on the prehensive consideration, the balance of the early set with one module and four cavities Type cavity layout, the design of gating system and pouring system refers to the injection mold from the beginning of the end to the mainstream way in the cavity between the melt feeding channel, gating system design is also a key link in the design of injection mould, its design is reasonable or not will affect the quality of the plastic products. The role of the gating system is made from injection Die jet nozzle of the plastic melt smoothly and successfully, paction and pressure. This design USES the balanced type is decorated, circular cross section distribution. Choose the form of a gate for direct gate, because the wall thickness is 1 mm, so choose contact parts of the gate to 1 mm wide. The generated gate, flow products and in people39。但是在老師的指導下通過問題的提出與解決,使我對這方面的知識有了更深的理解, 并且學習到了更多的新知識。 剛剛拿到畢業(yè)設計這個題目的時候,我真的是無從下手,因為我是學機制的,對于模具方面的知識真的接 觸的不是很多,運用到的軟件也不是很熟練,而真正在設計過程的這些問題也是凸顯得很明顯,在這樣的情況下我能做到的就是通過去問老師、懂這方面知識的同學和去圖書館借閱書籍來解決問題,我想這個思路是完全正確的,應為對于不懂的東西問那些有經(jīng)驗的人,可以讓我們少走很多的彎路,從而節(jié)省出很多的時間和精力。通過查找資料的過程中,使我對模具這方面的知識有了新的認識和理解,模具是一個高附加值技術密集的產(chǎn)業(yè),我們國家的制造業(yè)發(fā)展迅速,這對模具提出了新的要求,所以說模具技術的提高與開發(fā)大有文章可做。 ( 8) 檢查模具所用的各種配件,附件等,保證模具裝配齊全。 ( 6) 在裝配傳動系統(tǒng)(液動和氣動)管路之間的連接是否合格 。 ( 4) 在裝配頂出系統(tǒng)時由于我們設計的頂出系統(tǒng)是多頂桿頂出系統(tǒng)需要調(diào)整復位,頂出等裝置 。 ( 2) 裝配導套導柱機 構時需要保障開合模的動作輕靈沒有晃動阻滯現(xiàn)象的發(fā)生 。分型面的吻合面積不能少于 80%,間隙不能超過溢料量的極小值,裝配時要盡量保持原有的加工尺寸基準面,組裝每個系統(tǒng)時保證沒有卡滯、松動的現(xiàn)象產(chǎn)生,組裝時要保證所有的定位螺釘定位銷、連接螺釘緊湊,再試模,吧杜荷要求的零件做好標記,并且標記好組裝基準面。這個時間標準通常是以充分固化定型,而且保證了制品具備一定強度和剛度為依據(jù),它占到整個注射生產(chǎn)周期的80%,這個時間和制品的壁厚的材料有著直接的關系,根據(jù)我們的制品厚度為 毫米,材料為 pvc,查課本《塑料成型工藝及模具設計》第 210頁,得到這個時間是 秒。根據(jù)相關的規(guī)定,冷卻水線是用來開設冷卻孔的,開完孔之后要離型芯的下表面有 1015 毫米的距離,離型芯的上表面也要保持 1015個毫米的距離。我們的冷卻系統(tǒng)主要針對型芯,根據(jù)我們產(chǎn)品是小型模具的特點,把冷卻系統(tǒng)安置在了型芯上。 冷卻水線的分布原則 ( 1)冷卻口大,多分布均勻對制品的冷卻效果越好; ( 2)制品的壁厚和澆口的地方要加強冷卻; ( 3)冷卻水進出口的溫差低,能夠說明說明模具內(nèi)的溫度分布; ( 4)冷卻水線應遠離熔接的地方,可以防止熔接不良使得塑件強度減??; ( 5)如果有些部位熱量積聚打,溫度高擇要加強冷卻; ( 6)水孔和 型芯、型腔表面每個地方要有相同的距離,位置排列和型芯型腔吻合。在產(chǎn)品成型的過程中,模具的溫度會對我們材料的充型、定型、成型和產(chǎn)品的質(zhì)量有著密切的關系,并且對我們產(chǎn)品的成型周期起著至關重要的最用,所以冷卻系統(tǒng)的合理設計是整個模具設計中不可或缺的一環(huán)。 帶入數(shù)據(jù)算得 F=55N。 脫模力的計算 脫模力的計算公式有四個,根據(jù)塑件的圓形內(nèi)孔半斤與壁厚之比 m=tr (矩形塑件 m= tbaπ? )與 10進行比較,再然 后根據(jù)塑件橫截面形狀是矩形還是圓形。然后在設置頂桿的地面 ,我們在設計中選擇 F板的上表面來作為頂桿的地面。 肥皂盒注塑模具設計 21 推桿的結構 推桿有多種結構,如下圖: 圖 推桿形狀圖 在本設計中運用到的推桿就是第一種,可以看到推桿圓形截面。 在動模上施加一次推出力就可以實現(xiàn)塑件脫模的機構稱為一次脫模機構,而我們本次設計中才用到的脫模機構就是這種,這種機構簡單,高效非常實用。 脫模機構分類以及選擇 脫模機構分為好多種,按照不同的分類方式來進行區(qū)分。 華東交大畢業(yè)設計 第七章 脫模機構的設計 脫模結構的組成 當模具完成一次成型之后都要把成型好的塑件從模具型芯或者是型腔取出,在模具里面有一種用來完成這種任務的機構,這種機構成為脫模機構。 圖 61 導柱導向圖 在設計中采用導柱導向機構,導套與模板是過渡配合的帶頭套的導套機構我們都是從標準模架里面調(diào)出來的。錐面定位機構用于定模和動模之間精密的對中定位。具體看下面圖所示。它們的結構圖如下所示: 華東交大畢業(yè)設計 圖 裝配定模圖 圖 型腔裝配圖 兩個裝配圖都是經(jīng)過裝配和編輯的,并且澆注系統(tǒng)和冷卻系統(tǒng)都是在裝配環(huán)境下編輯而出的。綜上考慮我們采用一 模兩腔的結構形式。降低制造成本與提高產(chǎn)品質(zhì)量精度等之間的矛盾;要經(jīng)過大量的計算所需要的時間與較短的模具設計周期的矛盾;在型腔數(shù)目確定公式中需要留到凝料的質(zhì)量與型腔數(shù)目不確定,無法計算得到凝料體積的矛盾。最后裝配出來的零件時一模兩腔的型芯和型腔。盡量采用橫向的分型面,切勿采用直線分型面。因此必須重視分型面的設計與選擇。 ( 5) 澆口的設計要在型腔壁較厚的
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