Xem 1-20 trên 37 kết quả Injection molding
  • Đề tài Gas assist injection molding ép phun có khí hỗ trợ đặt vấn đề sự hình thành và phát triển của GAIM, tổng quan về GAIM, các quy trình trong GAIM, vị trí lỗ phun khí, các kỹ thuật điều khiển quá trình GAIM, các chất khí dùng trong GAIM, những tiến bộ và hạn chế của GAIM, nhựa dùng cho GAIM, những lưu ý khi thiết kế chi tiết, việc ứng dụng kỹ thuật GAIM, một số nét chính về khuôn dành cho GAIM. Xu thế phát triển của GAIM.

    pdf61p model_12 24-04-2014 96 38   Download

  • Plastic products are indispensable in our everyday life. Today, the injection molding is the most used method for producing plastics parts. Using injection molding process, the plastic materials can be melted or remelted and injected at high pressure into the mold cavity to produce parts with desired shape. I started my study on injection molding seven years ago. When I was an undergraduate student, I got acquainted with mechanics and control. Then, injection molding opened a new and interesting world for me to know mechanical engineering and plastic materials....

    pdf282p qsczaxewd 22-09-2012 59 26   Download

  • This paper presents the result of research on equipment development of vacuum injection molding technique for preparation the chopped bamboo fiber polymer composite and some properties of obtained composite material. For the vacuum injection molding technique, firstly the dry fibers were plated in the mold. Then the mold was closed by the vacuum bag, the air inside the mold was sucked out by a vacuum pump, due to the difference of the pressure in side and outside the mold, the polymer liquid was transferred to the closed mold and impregnated the bamboo fiber.

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  • Injection mold venting the hidden processing parameter. Volatiles emitted in increasing quantities by the newer materials often cannot be adequately vented by tradition means. Peripheral and water line venting are effective alternatives.

    pdf8p ckm0789 11-01-2014 16 1   Download

  • Presentations "report design and manufacture of plastic injection molds" was conducted with the following contents: The thickness of the product, the relevant defects, warping, how to fix, corner boards, tendons, tendon increases hard, protruding lug, lug sticking design, holes in the product, ... Invite you to consult the documentation.

    ppt30p danhnakg 23-09-2016 2 0   Download

  • Presentations "report design and manufacture of plastic injection molding injection molds 2 plate" was compiled with the following contents: Structure, operation principles and application. To master the content knowledge scratch paper invite you to consult the documentation.

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  • Presentations "report design and manufacture of plastic injection molding injection molds 3 plate" is made with the following contents: Structure, operation principles, applications, features recognizable. To master the content knowledge scratch paper invite you to consult the documentation.

    ppt12p danhnakg 23-09-2016 6 0   Download

  • Report Design and manufacturing plastic injection mold with hot runner is made on the drop contents: Constitute, hot runner, plastic funnel, functional parts of the hot runner, mouth spray. To understand the content of the report knowledge invite you to consult the documentation.

    ppt10p danhnakg 23-09-2016 5 0   Download

  • In the hot runner mold, the runners are kept hot in order to keep the molten plastic in a fluid state at all times. This is a “Runnerless” molding process and hence the name. Hot runner molds are similar to the three plate molds, except that the runner section of the mold is not opened during the cycle.

    pdf141p ckm0789 11-01-2014 37 18   Download

  • Handbook of plastic processes contents about: Injection molding, assisted injection molding, sheet extrusion, thermoforming, blow molding, rotational molding, compression and transfer molding, composite processes, liquid resin processes, assembly, decorating and finishing, polymer nanocomposites in processing.

    pdf745p ckm0789 11-01-2014 63 31   Download

  • Nomenclature: Plastic (adjective), plastics (noun), plastic materials engineered materials, thermoplastics, thermosets, all plastics are polymers, polymer (poly + mer) = many + units. Poly(many) Mer(parts): A large molecule made up of one or more repeating units(mers) linked together by covalentchemical bonds

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  • International Journal of Mechanical Sciences 48 (2006) 430–439 www.elsevier.com/locate/ijmecsci A systematic computer-aided approach to cooling system optimal design in plastic injection molding H.

    pdf10p xuanphuongdhts 17-12-2012 27 5   Download

  • The mold is probably the most important element of a molding machine. It is a arrangement, in one assembly, of one (or a number of) hollow cavity spaces built to the shape of the desired product, with the purpose of producing large numbers of plastic parts. Thus the primary purpose of the injection mold is to determine the final shape of the molded part (shaping function). In addition to give the final shape of the molding, the mold performs several other tasks.

    pdf0p goixanh 24-09-2010 89 34   Download

  • When the plastic melt fills the mold, it displaces the air. The displaced air must be removed quickly, or it may cause burn spot (due to the fast compression of trapped air pocket by the low-thermal-conductivity polymer melt), or it may restrict the flow of the melt into the mold cavity, resulting in incomplete filling (short-shot problem). Consider the injection-molding of a air bag housing. Notice that the part consists of a thin central region and a thick rim around it. A single gate is adopted in the original design. Most of the melt flow along the part side since...

    pdf0p goixanh 24-09-2010 75 25   Download

  • Basic Tasks of a Mold q Accomodation and Distribution of the Melt q Shaping of the Molded Part q Cooling/Heating and Solidification of the Melt q Ejection (Demolding) of the Molding q Mechanical Functions Accomodation of forces Transmission of motion Guidance of the mold components CORETECH SYSTEM The mold is probably the most important element of a molding machine. It is a arrangement, in one assembly, of one (or a number of) hollow cavity spaces built to the shape of the desired product, with the purpose of producing large numbers of plastic parts.

    pdf0p tieulac 29-11-2010 75 22   Download

  • tuy nhiên, việc thiếu phân tích kỹ thuật cơ bản trong thiết kế khuôn mẫu thường xuyên kết quả trong các khuôn có thể thất bại và yêu cầu làm lại mở rộng, sản xuất moldings của chất lượng kém, hoặc là ít hiệu quả chi phí hơn có thể có được có thể. Thật vậy, nó đã được ước tính trên trung bình 49 là 50 khuôn mẫu yêu cầu một số sửa đổi trong quá trình bắt đầu nấm mốc.

    pdf13p myngoc2 04-10-2011 47 18   Download

  • In the last 30 years, plastics have become the most dominant engineering material for most products. We take a brief look at the most common types of plastics, and how they are processed. All plastics are polymers, these polymers are further divided into two basic types: thermoplastics and thermosets.

    pdf16p ckm0789 11-01-2014 43 3   Download

  • In this document Plastic and Polymer Composite - Fabrication Processes, there are many contents: injection molding (or compression or transfer), extrusion, thermo-forming, blow molding (injection blow molding with preforms or extrusion blow molding with parison), rotational molding (combination of 3 and 4).

    ppt29p thu7764 17-04-2014 22 3   Download

  • Theo đặc tính cơ, tiêu chuẩn NEMA của Mỹ chia động cơ không đồng bộ thành 4 lớp A, B, C, D: · Lớp B: loại thông dụng (general purpose) · Lớp A: có momen tới hạn cao và độ trượt định mức thấp, dùng trong các ứng dụng có yêu cầu momen tới hạn cao như máy ép phun (injection molding machine)

    ppt70p vuhuy90 02-12-2009 463 233   Download

  • ĐÚC PHUN (INJECTION MOLDING) Đúc phun là một quá trình đa năng, tạo ra sản phẩm từ vài gam đến 150kg. Nhựa nóng chảy được đưa vào khuôn đúc, làm lạnh cho đến khi nhựa đóng rắn. Sản phẩm lấy ra và quá trình được lập lại. Đúc khuôn: năng suất cao, độ chính xác cao, tạo được sản phẩm có hình dạng phức tạp. Với nhựa nhiệt dẻo, 90% sử dụng đúc phun. Đúc phun liên quan đến 1/3 sản lượng nhựa tiêu thụ để gia công nhựa nhiệt dẻo.

    pdf20p suatuoi_nguyenchat 21-07-2011 244 148   Download

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