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Shaping Tooling Design

  • Added: 09.07.2014
  • Size: 4 MB
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Description

Course project. Design of molding equipment for toothbrush casting

Project's Content

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icon Курсак по формующим.doc
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icon неподвиж деформ.bmp
icon неподвиж нап.bmp
icon неподвиж пер.bmp
icon неподвиж стат нарпяжение.bmp
icon неподвиж стат перемещ.bmp
icon неподвиж.bmp
icon подвиж напря.bmp
icon подвиж перем.bmp
icon подвижная деформ.bmp
icon подвижная стат напряжения.bmp
icon подвижная стат перемещения.bmp
icon подвижная.bmp
icon Инжектор.cdw
icon Лист 1.cdw
icon Матрица.cdw
icon Обойма знаков.cdw
icon Плита толкателей.cdw
icon Пуансон.cdw
icon Толкатель.cdw
icon Деталь1.1.SLDPRT
icon Деталь1.SLDPRT
icon неподвижная.SLDPRT
icon подвижная.SLDPRT
icon проба.SLDPRT
icon Спецификация инжектора.spw
icon Спецификация.spw

Additional information

Contents

Introduction

1. Design part

1.1. Casting Machine Selection

1.2. Calculation of the shape nest

1.3. Calculation of cycle time

1.4. Performance calculation

1.5. Calculation of product shrinkage

1.6. Calculation of ejection force

1.7. Cooling system calculation

1.8. Calculation of hot channel system

2. Strength calculation

2.1. Calculation of support plates for crushing

2.2. Calculation of the column for bending

2.3. Calculation of shear bolts

2.4. Calculation of eyebolt

3. Justification for selecting mold parts and materials

Conclusion

List of literature used

Introduction

Injection molding is perhaps the most modern and relatively inexpensive (compared to the same pressing) method for making plastic products. Nowadays, the plastic processing industry is an integral part of our life, for example, take the same plastic packaging. The world is slowly moving away from the expensive heavy metallurgy. More and more plastic products appear to replace their "heavy" expensive, inferior in all respects to "brothers."

This course project in the discipline "Forming Tool" is a logical completion of calculation and graphic work on the subject "Fundamentals and Design of Plastic Products."

The purpose of this work is to design a hot channel mold for injection molding of a toothbrush.

The essence of this technology is that the shape consists of two parts: a cold matrix, into which products are formed, and a much more complex hot part. Heated hot mould channels are permanently filled with molten polymer material. The hot channel part of the mold is equipped with pre-chamber injection units with point inlet. In operation, the injection assembly of the injection molding machine is permanently closed to the mold.

3. Justification for selecting mold parts and materials

For the die and punch, corrosion resistant steel St14X17H2 is used, since PETG is chemically active.

Fastening plates, intermediate plates from Steal45. To increase the strength of the surface, cementation is carried out.

Pushers, signs St14X17H2 as they contact material

The directing columns U8A. This is bulk hardened steel. GOST 143590. After heat treatment, it has high hardness, wear resistance, are well polished, treated by an electric erosion method.

Shank, Stal45 nuts. Since this steel has a low cost and quite good strength and mechanical characteristics.

Heating element Steel 45

Bushings - Steel45

Stall20 sign cage

Pusher attachment plate, pusher plate St30. To increase the strength of the surface, cementation is carried out.

Spring Steel 60G GOST 14959-79

Conclusion

During the work, a mold was developed and designed for the production of single-layer toothbrushes. The work consisted of several parts: designing the shape itself and conducting strength calculations.

Due to the fact that the thickness of the article is not uniform along its length, and it is thick-walled, a hot channel system was chosen. A manifold was developed for it and multipoint nozzles (injectors) were selected. For convenience of removal, 2 connector lines were provided, as well as hooks and rods for returning the system to its original position when closed. Also specially for my product, a cage of signs was developed to design holes for the bristles of the toothbrush .

The strength calculation was: in the calculation of support plates for crushing, the calculation of a guide column for bending and bolts for cutting. All calculations meet the specified requirements and do not exceed the standard tolerances for each type of calculation.

Drawings content

icon Инжектор.cdw

Инжектор.cdw

icon Лист 1.cdw

Лист 1.cdw

icon Матрица.cdw

Матрица.cdw

icon Обойма знаков.cdw

Обойма знаков.cdw

icon Плита толкателей.cdw

Плита толкателей.cdw

icon Пуансон.cdw

Пуансон.cdw

icon Толкатель.cdw

Толкатель.cdw

icon Спецификация инжектора.spw

Спецификация инжектора.spw

icon Спецификация.spw

Спецификация.spw
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