GASEXIT BUSH

Gas Venting Solution at Sprue End

GASEXIT BUSH is a sprue bush / sprue lock bush that discharges gases from the sprue end part.
【Patent pending】

Isn’t there a large amount of gas tar stuck to the sprue bush during mold maintenance?

This is because the gas accumulated in the nozzle is exhausted outside the mold from the gap between the bushes.

However, the gas tar will stick to the gap between the bushes after production has been done for a while, causing the gas to flow into the product surface, generating product defects.

GASEXIT BUSH is a product that can most efficiently discharge the gases accumulated in such nozzles.

Gas venting image

GASEXIT BUSH features

Example of a real usage of the GASEXIT BUSH

Gas venting image

Gas venting image clip

GASEXIT BUSH features

feature 01

The gases removal effect improves when used in combination with GASEXIT EP

Even if the GASEXIT EP is installed at the cold slug, if the size is small, the gases flowing from the nozzle may not be able to be exhausted sufficiently with the GASEXIT EP alone.

However, by using GASEXIT BUSH together, even if the cold slug size is small, the gases can be discharged from the surface where the runner and bush contact, so it is possible to increase the Mold Venting volume.

The gases removal effect improves when used in combination with GASEXIT EP

feature 02

Expanding the gas discharge surface by adding a puddle!

By reducing the length about 1 mm shorter than the existing bush, the sprue end is provided with a puddle.

Since it is possible to discharge the gases from the puddle side as well, the amount of discharge will be significantly increased.

（Roughly 6 times more ratio with the GAS EXIT EP）

Expanding the gas discharge surface by adding a puddle!

feature 03

Available in the same standard dimensions as existing bushes

Since we will manufacture the product with the same size as the bush size that is currently in use, The customer does not have to modify anything, just replace it with the GASEXIT BUSH and you can immediately apply gassing countermeasures.

※Non-standard products can be manufactured if you specify us the dimensions.

Available in the same standard dimensions as existing bushes

Compatible with standard products of each company

Inquiries here regarding GASEXIT BUSH

The product 「GASEXIT BUSH」 can effectively reduce molding defects caused by gas and extend the maintenance cycle of the mold. If you have inquiries or would like to discuss further about GASEXIT BUSH, please feel free to contact us.

Example of a real usage of the GASEXIT BUSH

I want to solve a gas burn defect in a part in which an insert cannot be used.

Osaka Prefecture K Company

Problem	60% of gas burn defects occur in the final filling part ※Material：PBT(GF)
Countermasure	Exchange sprue bush for the GASEXIT SPRUE BUSH
Results	Gas burn defect became 0%

Solutions to burn marks in locations where cannot be made into inserts.

Thailand Company T

Problem	Maintenance is required in every two days; burn mark occurs on the tip of rib (dead-end section) otherwise. (Insert is non-ideal due to split lines)
Countermasure	Exchange sprue bush & sprue lock bush with GASEXIT SPRUE BUSH & GASEXIT SPRUE LOCK BUSH.
Results	Burn mark disappeared without mold maintenance.

Solving short shot and flash without mold modification.

Japan Company N

Problem	Short shot, whitening, and flash occur in the grid area due to its dead-end nature, narrowing processing window and poor stability. ※Resin: PP-TD10
Countermasure	Exchange sprue bush with GASEXIT SPRUE BUSH. ※2 EPs on runner section also exchange with GASEXIT EP.
Results	Achieved defect-free molding conditions without short shot or flash.