Stretching INJECTION BLOW

These machines are usually used for the manufacture of PET bottles DNG material, where the process of formation of products through the 3 stages of injection, stretching and blowing but DNG certain type of screw can be used also for other materials such as Polypropilene (PP) dng a particular grade.

PET bottle-making process itself usually there are 2 ways

1.SINGLE (ONE) STAGE

-All the process of making preform until it becomes the bottle in one machine

2.DOUBLE (TWO) STAGE

-The process of making DNG preform injection machine and then a new engine in DNG stretching BLOW Blow Molding (separate)

COMPONENTS AND FUNCTIONS OF MOLD ISB

1.INJECTION cavity preform

-To make the outside of the preform shape

2.CORE ROD

-To make the inside of the preform

3.LIP cavity

-To make the mouth of the bottle preform

4.NECK RING

-For the manufacture of the preform neck

5.BLOW SHELL

-To create the desired product form

6.HEATING POT (POT CONDITIONING)

-For conditioning the preform temperature before curl

7.STRECHING ROD

-To encourage the concurrent preform blow dng in the process of formation of the desired product.

8.STRIPPER PLATE

-To drop a product that has been established

PART 9.BOTTOM

-To form the bottom part of the bottle

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Epicyclic Gear Trains

When at least one of the gear axes rotates relative to the frame in addition to the gear's own rotation about its own axes, the train is called a planetary gear train or epicyclic gear train. The term ``epicyclic'' comes from the fact that points on gears with moving axes of rotation describe epicyclic paths. When a generating circle (planet gear) rolls on the outside of another circle, called a directing circle (sun gear), each point on the generating circle describes an epicycloid, as shown in Fig. 2.7.

Generally, the more planet gears there are, the greater is the torque capacity of the system. For better load balancing, new designs have two sun gears and up to 12 planetary assemblies in one casing.

In the case of simple and compound gears, it is not difficult to visualize the motion of the gears, and the determination of the speed ratio is relatively easy. In the case of epicyclic gear trains, it is often diffuclt to visualize the motion of the gears. A systematic procedure using the contour method is presented in what follows. The contour method is applied to determine the distribution of velocities for an epicyclic gear train.

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Mechanical Engineer's Handbook

Edited by

Dan B. Marghitu

Department of Mechanical Engineering, Auburn University,

Auburn, Alabama

Academic Press Series in Engineering

Series Editor

J. David Irwin

Auburn University

Variations and Extension to the Injection-Molding Process

Injection Blow Molding. 

A preform (this looks like a test tube with bottle cap threads) is injection molded in one cavity, removed and then placed into another where it is pressurized with gas to stretch the hot preform into a thinnerwalled

seamless bottle or container such as a milk bottle or gas tank. This is depicted in Figure 7. This is an extension of injection molding more than a variation.

Injection Compression/Coining. 

With this technique the mold is only partially closed during injection. At the appropriate time and with the right amount of plastic in the mold, the clamp is then completely closed, forcing (compressing) the plastic to the shape of the mold cavity. A variation on this is coining.

The clamp is closed but the mold has components that compress the plastic in the cavity as the plastic cools. Coining is where the cavity volume is changing during the solidification of the plastic. Plastic is injected into the cavity and then the movable platen closes completely, or a mold component moves to compress the

plastic to compensate for shrinkage or densification.

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“Injection Molding” in EPSE 2nd ed., Vol. 8, pp. 102–138, by I. I. Rubin, Robinson Plastic Corp.

JOHN W. BOZZELLI

Midland, Michigan

Members of Design Teams

The number and type of individuals that comprise a design team is largely determined by the size of the design project. Even though an individual is assigned to a team, all members may not be involved at all times. In a concurrent engineering environment the team members work together to meet the common goal. Typical members of a design team might include:

I. Product design engineer-responsible for the overall product design.

2. Product manager-the person who has the ultimate responsibility for a design and its team.

3. Mechanical engineer-responsible for mechanical and electromechanical product development.

4. Electrical engineer-responsible for electronic components of the design.

5. Manufacturing engineer-responsible for the manufacturing processes used to create the product.

6. Software engineer-responsible for any computer software code needed for a product.

7. Detailer/drafter-assists the engineers with the 3-D modeling and documentation of the product.

8. Materials engineer-responsible for the selection of the material hest suited for a product.

9. Quality control engineer-responsible for meeting the quality guidelines for the product and its

manufacture.

10. Industrial designer-responsible for the product's appearance, form. and human factors analysis.

II. Vendor representatives-responsible for any outsourcing required by the company making the design.

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The Engineering Design Process

Bertoline-Wiebe-Miller: Fundamentals of Graphics Communication,

The McGraw-Hill Companies, 2001