Auto Bumper Mould

Sino has rich experience in supplying and exporting front auto bumper mould and back auto bumper mould to the whole of the world. With the improving of customers’ requirements for quality, precision and surface finish. In 2010 year, Sino invested 3.5 million USD for purchasing new tooling machines to realize improvement of the project high quality and high precision. So until now Sino has been accumulating the experience and importing the advanced technology in automotive moulds.

We pay high attention on five aspects of bumper mould:

1. Steel types:

Cavity-Thyssen KrupDIN1.2738;

Core-Thyssen KrupDIN1.2312;

Slides-Thyssen KrupDIN1.2738+Nitrided

Mould base-1.1730

2. Injection system: we adopt Synventive Sequence Nozzles

3. Injection gate location: The best location of injection gate could reduce the pressure difference of cavity, it will affect the quality of auto bumper.

4. Ejection system: Hydraulic cylinders(European Vega brand)

5. Surface finish: Sino design the departing line on the non exterior surface to be ejected, which will avoid small step on the surface of auto bumper and avoid the issue of cutting flash. In a word, it helps to realize the smooth surface.

Welcome you down to our company, if you are interested in our automotive mould. Please do remember that we can not only offer high quality auto bumper mould for you, but also can offer you the whole bumper production line.

Post by Miss Mandy

Email: auto@sinomould.com   

Skype: sino.mould

Syringe Barrel Mould

Sino mould was founded in year 1999 being located in Huangyan of China. We mainly engage in plastic injection mould making and plastic molding. We have more than 600 employees and 500,000 square meters of factory space. We have advanced machining machines like CNC, EDM machine, wire cutting. We manage OEM business. We are highly experienced in medical moulds, like test tube mould, oxygen mask mould, blood dialysis tube mould, especially in disposable syringe mould.

Below is specification of syringe barrel mould made by Sino Mould

Product Material: PP

Syringe size from: 0.5 to 60 ml

Syringe Barrel Mould Cavities No. from 16 cavities to 128 cavities.

Syringe Barrel Mould cavities and core steel: Stavax S420 made in Sweden Assab Co. Stainless and temper steel

Syringe Barrel Mould Base: P20 Made in America

Slide for cores adopts Luer slip system.

Injection Gate Type: Pin point gate Anole Hot Runner system

Syringe Barrel Mould cavities and cores finishing: mirror polishing finishing

Syringe Barrel Mould Component: inserted into the mould bases, the same parts in the mould are Interchangeable

Syringe Barrel Mould life guarantee: minimum 5 million strokes

Except manufacturing syringe mould, we also can offer the whole production line for customers who want to start syringe project but short of experience. We can offer customer pre-sale service, sale service and after-sale service. What’s more, we will arrange our experienced engineers to go to customers’ factories to help them assemble machine and teach them how to operate and maintain our machines.

Post by Miss Mandy

Email: auto@sinomould.com

Skype: sino.mould

The Advantages of Hot Runner

The runner is a channel machined into the mould plate to connect the sprue with the entrance to the impression. Generally speaking, there are two kinds of runner: one is cold runner, another one is hot runner. But in this text we just talk about the advantages of hot runner.

There are several common types of hot runner, like pin point gate, direct gate, valve gate, special gate, horn gate, timer valve gate and so on. Each of them has its advantages:

1. Pin point gate

1.1 There just has a spot in the plastic parts appearance

1.2 The temperature around gate basin is low

1.3 It suitable for crystalline and amorphous material

2. Direct gate

2.1 Compare with pin point gate, direct gate has a open and direct runner

2.2 Its injection quantity is bigger and injection pressure is smaller

2.3 It is suitable for long flow length and the thicker wall thickness injection parts

3. Valve gate

3.1 Compare with pin point gate and direct gate, the spot in the plastic parts appearance is really small and nice

3.2 Valve gate is automatic opening and closing through valve needle

4. Timer valve gate

4.1 Relative to valve gate, timer valve gate can control the gate inject in turn to keep injection balance.

All in all, hot runner can save material, gate trace is nice, reduce cycle time and improve product quality.

Post by Miss Mandy

Email: auto@sinomould.com

Skype: sino.mould

The Function of Sprue Puller

Sprue puller is very common design in cold runner plastic injection moulds, but different companies have different desing. But there are two basic designs of sprue puller, in one the undercut is produced within the cold slug well region, and is situated below the parting surface. In the other design, the undercut portion of the sprue pulling device is situated above the parting surface. To differentiate between these two basic types, we designate them type A and type B respectivity.

                                                                                

It is very important that sprue is pulled absolutely from the sprue bush when the mould opens. For single-cavity moulds, the sprue feeds directly into the base of the component. The sprue is pulled at the same time as the moulding is pulled from the cavity.

For multi-cavity moulds which using a basic feed system the sprue would probably be left in the sprue bush each time the mould was opened. This would be waste time since it needs worker to remove the unwanted sprue, then continue production. To avoid this disgusting problem and save labor cost, an arrangement for pulling the sprue should always be adopted in the design.

About common sprue pulling methods, it adopts an undercut pin or an undercut recess situated directly opposite the sprue entry. The plastics material which flows into the undercut, upon solidifying, it will provide sufficient adhesion to pull the sprue as the mould is opened. This is the most common design among mould industry.

In a word, in order to help customer save labor cost, material usage and improve the production efficiency, the best sprue design should be as short as possible. What’s more, the bushing should have a smooth, tapered internal finish that has been polished in the direction of the draw in order to ensure clean separation of the sprue and the bushing.

Post by Miss Mandy

Email: auto@sinomould.com

Skype: sino.mould