Injection mould tool design books

Gaurav Agrawal II rated it really liked it Jan 06, Zafeyro rated it liked it Jun 02, Mitesh rated it really liked it Dec 17, Amit Wakade rated it it was ok Aug 01, Sujit Saha rated it did not like it Aug 05, Junaid Shaikh rated it liked it Dec 28, Rishabh Gupta rated it it was amazing May 26, Apr 24, Rajni is currently reading it.

Good book. Govardhan rated it really liked it Aug 17, Anuj Kumar rated it really liked it Feb 19, Thakare Pratik rated it it was amazing Sep 30, Deepankar rated it really liked it Nov 27, Ninad Khadse rated it it was amazing Apr 23, Sevanth Poojari rated it it was amazing Oct 08, Jagadeesh rated it it was amazing Jul 11, Ankit rated it liked it Jan 22, Sai Mohan rated it it was amazing Nov 09, Aji Harianto rated it really liked it Jan 28, Sandeep added it Jul 28, Vinoth Kumar marked it as to-read Nov 19, Udeept Bhanu marked it as to-read Dec 09, Om Veer marked it as to-read Dec 17, Vijay Baranwal marked it as to-read Dec 19, Karthik Iyer marked it as to-read Jan 09, Rohit marked it as to-read Jan 23, Gajjar Pratik marked it as to-read Jan 24, Arun marked it as to-read Mar 16, Hitesh Vadhel added it Mar 17, Ahmed Faraz added it Mar 24, Sudhir added it Apr 02, Harinder Singh marked it as to-read Apr 08, Sreeraj marked it as to-read May 05, Devarshi Panchal marked it as to-read May 06, Parth Sheth added it May 13, Hitesh marked it as to-read May 15, Eng Alaa marked it as to-read May 20, Vicky marked it as to-read Jun 06, Suresh marked it as to-read Jun 14, Santosh Prasad marked it as to-read Jun 17, Sajja Chandu marked it as to-read Jul 09, Gurpreet Singh added it Jul 24, Nikhil Ninawe marked it as to-read Jul 27, Adi marked it as to-read Jul 28, B Y marked it as to-read Jul 31, Sandip marked it as to-read Aug 11, Jayesh Patel marked it as to-read Aug 28, There are no discussion topics on this book yet.

Be the first to start one ». Readers also enjoyed. About R. The completed mold is inspected against a comprehensive checklist. A molding process is established that is acceptable to the manufacturing department. Processing parameters are recommended and established. Initial sampling using scientific molding practices is carried out; cavity pressure transducers in the mold accurately determine the filling profile over time.

Sample parts are qualified. Any needed process adjustments are made as required. Tool construction is verified and the process is detailed and documented so it can be used in the future with minimal setup time. Perfect parts are resampled and submitted to the customer. After final approval is obtained from the customer, the production process is launched. Most molds are made from hardened or pre-hardened steel. Hardened steel heat treated after machining has superior wear resistance compared to pre-hardened steel and lasts longer.

Although steel molds are more expensive than molds made from other materials, such as aluminum, they are more durable and support a higher rate of production before they need to be replaced.

Design engineers must take into account steel hardness versus steel brittleness. Harder steel is more brittle and therefore not a good choice for mold components that are subjected to side loading or impact, because if it flexes it will crack. Harder steel is also required for molding glass-filled material, which can prematurely wear down tooling; wear can also be heavy on runner systems and gates. Because of its rapid cooling characteristics, aluminum is sometimes used for tooling.

It can also reduce the time required for building the mold because it is easier to machine than steel, providing faster turnaround and production cycles. However, because it is softer than steel, even hardened aluminum is harder to weld, difficult to maintain, and wears more rapidly—making it most suitable for prototypes and short runs.

Depending on the product and mold design, hybrid molds can sometimes be built that are mostly steel but use aluminum in low-wear areas to transfer heat. Aluminum is not a good choice for complex parts or harder, glass-filled plastics because of premature wear.

Copper alloys are sometimes used as an aluminum replacement when rapid heat dissipation is required. Both steel and aluminum molds can be coated with special materials to improve wear resistance and reduce friction, especially when molding fiber glass-reinforced plastics, making tooling last longer. Common coatings are nickel-boron and nickel-teflon the 0.

Gates are the openings at the end of the runners that direct the flow of molten plastic into the mold cavity. Gates vary in size and shape depending on the part design and resin material.

One aspect of mold design that cannot be overlooked is the easy removal of the final product from the mold, with no damage to the surface of the part. This is accomplished by applying a draft angle, or taper, to the walls of the mold. The amount or degree of draft angle depends on several factors, including design of the part, material, depth of the mold cavity, surface finish, texture, and amount of shrinkage.

Typically an angle of only a few degrees is applied to the side walls of the mold and creates enough space that the part can be easily removed when the mold is opened. Generally, the deeper the cavity, the more draft is required. Draft angles typically vary from about 1 to 5 degrees. Mold cooling and part cooling are critical for determining surface finish. For example, a smooth surface finish on a percent glass-filled resin depends on proper temperature control.

The surface must be resin-rich with the fiber glass slightly deeper in the part, which requires a hotter mold—this also means it takes about ten percent longer to cool. Molds can also be designed to apply a texture or pattern to the mold surface—this can actually eliminate assembly steps by creating the company logo in the plastic, for example.

Texture can also provide better product function, such as enhanced grip or reduced wear from friction. Types of textures include matte, gloss, graphics, grains, logos, and geometric patterns.

Depending on the type, depth, and location of texture, draft may need to be adjusted to facilitate part ejection, which is determined during the mold design process.