Step by Step Mold Design (part 2), Insert Design

continuing with the previous post, now let's make some insert in core side, this insert very simple and easy in machining process. from the core block side we divide at the circle line of side of bowl, why ?, because we will eject the product using stripper plate, stripper plate construction will eject...

Read More

step by step mold design of ejector plate type

PRODUCTby sample complate design of bowl i'll try to explain easily how to design a mold, start with simple product a bowl like picture belowby looking the bowl, we can consider that bowl only need core cavity side without undercut release.PARTING LINE choosing the right parting line is important, parting...

Read More

shringkage of mold calculation, mold calculator

as the request, lot of people need engineering and calculation of injection mold and mold design, so i try to make little software, the name is mold calculator, it's freeware so download it and you can publish it, now it still under development, in this beta version this software only provided various...

Read More

3D and Drawing ejector simple construction in mold with video

simple and cost effectively ejector system i try to design, it using very minimum part, using this ejector system just have 3 ejector pin, by understanding minimum part to make ejector system, we can develops more complex ejector system. see picture belowthis ejector system is same with previous post,...

Read More

Ejector Component List for ejector pin type

Each type of mold have their own ejector system characteristics, such as : one step ejector, two step ejector, stripper ejector system, pin and blade ejector system, gas ejector, and vacum ejector. from various ejector system that available all of that type have main part or main component. picture...

Read More

How to Calculate Clamping force

as we know clamping unit purpose is to keep mold closed against force when part injected with plastic material, because of that clamping force at least more than injection force, we can applied this clamp pressure both in injection machine with hydraulic or with mechanical toggle.Injection molding machines...

Read More

Polypropylene Injection Molding Problems and Solutions

some times when we try to inject plastic part, problems always occur, beginning with shot mold, flashing, and some times jetting.data below i take from Exxon Mobil Chemical, will explain various Injection Molding Problems and how to solve that properly.it's begin with sink markvoidshrinkageweld lineflashburningwarpbrittle partsticking in moldgate bush and various others below if you prefer read it online Injection Molding Problems and...

Read More

Calculation and Designing Support Pin or Leader Pin

as we know in previous posting about main construction of mold, there was pin in leader component, this pin will support main construction and cavity plate (3) from deflection and guide the cavity part and core part when mold closing. here the picture of support pin or leader pin in 3 plate mold type.Support...

Read More

Considering Factor that affecting gate size

when we design a gate for mold injection, we need a proper size of gate, to large size of gate will make unbalanced flow and defect in product. to small size of gate make cycle time high, unfil l of product and sink mark is appear easily in product.although there was various factor that affecting gate size, here i list some common factor that affecting gate size.Mass of Partof course large mass of part need more large gate size, i still doesn't have...

Read More

Pin Point Gate Construction

pin point gate is commonly used in 3 plate mold types, see explanation more about 3 plate more here, basically the pin point gate part is like picture belowthose picture is pin point gate picture, to make gate like that we can buy pin point gate bush in mold manufacture company or we make it by EDM...

Read More

Opening Construction of 3 Plate Mold Type

previous post a href="http://mould-technology.blogspot.com/2008/08/main-construction-pin-at-3plate-mold.html">http://mould-technology.blogspot.com/2008/08/main-construction-pin-at-3plate-mold.html we can see closed condition of three plate moldspicture below is shown three plate condition when openbasically...

Read More

Main Construction Pin at 3Plate Mold

I take those topic, to start learning about kind of pin on 3 Plate Molds, becouse between 3plate and 2 plate mold have several different function of Pin.Basically 3 Plate mold to support the main construction have 3 kind of Pin.Look at picture below(click the picture to enlarge)3 Part Pin are1. Main...

Read More

Sprue bush cooling design and construction

some times sprue bush need cooling to cut the cycle time of injection process, when diameter of sprue is large cooling in sprue bush is important. some fabrication of mold part have their own sprue bush that containing cooling pipe. like picture belowfrom those picture some standard part mold company...

Read More

Locating Ring Design and Construction in Injection Mold

Locating ring is simple part but, very important when mold base attach to injection machine, ok here the construction of locating ring after assembled in mold base.then after attach in injection mold, the position of locating ring is like belowBasic Rule Design1. when design locating ring, first rule...

Read More

Sprue Bush Design in Injection Mold

The molten plastic injected from the injector nozzle will go through a sprue (sprue bush), a runner, and a gate and fill up in the cavity.As the temperature of molten plastic is lowered while going through the sprue and runner, the viscosity will rise; therefore, the viscosity is lowered by shear heat...

Read More

Other Joint Construction Betwen Cooling in cavity and Mold base with O Ring

What is O ringo-ring is a loop of elastomer with a round (o-shaped) cross-section used as a mechanical seal or gasket. They are designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface. (wikipedia.com)O-Rings are torus-shaped (i.e....

Read More

Construction of Cavity Cooling and Mold Base Cooling, O ring

here the basic construction of joining cavity cooling and mold base cooling, we can use from simple construction to joint cavity and mold base cooling with one O ring, or we can use more complex construction like using special plate, and various O ring seal type. here is basic construction to joint...

Read More