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A discharge apparatus for a two-stage injection molding machine, includes a check shaft seat having a runner, and disposed between a feeding portion and an injection portion of the two-stage injection molding machine, for allowing a plastic material in the feeding portion to enter the injection port

A discharge apparatus for a two-stage injection molding machine, includes a check shaft seat having a runner, and disposed between a feeding portion and an injection portion of the two-stage injection molding machine, for allowing a plastic material in the feeding portion to enter the injection portion via the runner; at least one check shaft disposed in the check shaft seat, and for opening and closing the runner via movement of the check shaft; at least one cover provided at a side of the check shaft seat, and having at least one discharge hole for discharging residues of the plastic material between the check shaft seat and the check shaft; and at least one adjustable unit for adjusting a discharge speed of the residues of the plastic material. The discharge hole and the adjustable unit can prevent locking of the check shaft and pollution from degraded residues of plastic material.

대표청구항 ▼

What is claimed is: 1. A discharge apparatus for a two-stage injection molding machine, comprising: a check shaft seat having a runner, and disposed between a feeding portion and an injection portion of the two-stage injection molding machine, for allowing a plastic material in the feeding portion

What is claimed is: 1. A discharge apparatus for a two-stage injection molding machine, comprising: a check shaft seat having a runner, and disposed between a feeding portion and an injection portion of the two-stage injection molding machine, for allowing a plastic material in the feeding portion to enter the injection portion via the runner; at least one check shaft disposed in the check shaft seat, and for opening and closing the runner via movement of the check shaft; at least one cover provided at a side of the check shaft seat, and having at least one discharge hole in communication with a gap formed between the check shaft and the check shaft seat, for discharging residues of the plastic material located in the gap; and at least one flow-regulating unit disposed in the cover for adjusting an opening of the discharge hole, thereby adjusting an amount of flow of the residues of the plastic material discharging therethrough. 2. The discharge apparatus of claim 1, wherein the check shaft is rotatable to open the runner to supply the plastic material during feeding of the plastic material, and is rotatable to close the runner to stop supplying the plastic material when feeding of the plastic material is stopped. 3. The discharge apparatus of claim 1, wherein the flow-regulating unit comprises at least one adjustable bolt that adjusts the amount of flow of the plastic material discharging through the discharge hole. 4. The discharge apparatus of claim 3, wherein the adjustable bolt adjusts the opening of the discharge hole in accordance with characteristics of the plastic material. 5. The discharge apparatus of claim 3, wherein the adjustable bolt is provided in the discharge hole of the cover. 6. The discharge apparatus of claim 3, wherein the check shaft is rotatable to open the runner to supply the plastic material during feeding of the plastic material, and is rotatable to close the runner to stop supplying the plastic material when feeding of the plastic material is stopped. 7. The discharge apparatus of claim 1, wherein the flow-regulating unit comprises an adjustable spring disposed between an adjustable bolt and a movable leakage stop block. 8. The discharge apparatus of claim 7, wherein the adjustable bolt is for adjusting a pressure applied to the movable leakage stop block in accordance with characteristics of the plastic material. 9. The discharge apparatus of claim 7, wherein the adjustable bolt, adjustable spring and movable leakage stop block are provided in the discharge hole of the cover. 10. The discharge apparatus of claim 7, wherein the check shaft is rotatable to open the runner to supply the plastic material during feeding of the plastic material, and is rotatable to close the runner to stop supplying the plastic material when feeding of the plastic material is stopped. 11. The discharge apparatus of claim 1, wherein the flow-regulating unit comprises at least one adjustable shaft that adjusts the amount of flow of the plastic material discharging through the discharge hole. 12. The discharge apparatus of claim 11, wherein the adjustable shaft is for adjusting the opening of the discharge hole in accordance with characteristics of the plastic material. 13. The discharge apparatus of claim 11, wherein the adjustable shaft is provided in the discharge hole of the cover. 14. The discharge apparatus of claim 11, wherein the adjustable shaft comprises a rod having a through hole for the plastic material to flow therethrough. 15. The discharge apparatus of claim 11, wherein the check shaft is rotatable to open the runner to supply the plastic material during feeding of the plastic material, and is rotatable to close the runner to stop supplying the plastic material when feeding of the plastic material is stopped. 16. The discharge apparatus of claim 1, wherein the at least one cover comprises at least two covers, each being on an opposite end of the check shaft and each having at least one discharge hole that is in constant communication with the gap formed between the check shaft and the check shaft seat, for discharging residues of the plastic material. 17. A discharge apparatus for a two-stage injection molding machine, comprising: a check shaft seat having a runner, and disposed between a feeding portion and an injection portion of the two-stage injection molding machine, for allowing a plastic material in the feeding portion to enter the injection portion via the runner; at least one check shaft disposed in the check shaft seat, and for opening and closing the runner via movement of the check shaft; at least two covers provided on the check shaft seat and on an opposite ends of the check shaft, each cover having at least one discharge hole in communication with a gap formed between the check shaft and the check shaft seat, for discharging residues of the plastic material located in the gap; and at least two flow-regulating units, each being disposed in a respective cover for adjusting an opening of the discharge hole, thereby adjusting an amount of flow of the residues of the plastic material discharging therethrough. 18. The discharge apparatus of claim 17, wherein each flow-regulating unit comprises an adjustable bolt, an adjustable spring disposed between a movable leakage stop block and an adjustable bolt, or an adjustable shaft. 19. The discharge apparatus of claim 17, wherein the check shaft is rotatable to open the runner to supply the plastic material during feeding of the plastic material, and is rotatable to close the runner to stop supplying the plastic material when feeding of the plastic material is stopped. 20. A discharge apparatus for a two-stage injection molding machine, comprising: a check shaft seat having a runner, and disposed between a feeding portion and an injection portion of the two-stage injection molding machine, for allowing a plastic material in the feeding portion to enter the injection portion via the runner; at least one check shaft disposed in the check shaft seat, and for opening and closing the runner via movement of the check shaft; at least one cover provided at a side of the check shaft seat, and having at least one discharge hole that is in constant communication with a gap formed between the check shaft and the check shaft seat, for discharging residues of the plastic material located in the gap; and at least one flow-regulating unit disposed in the cover for adjusting an opening of a discharge hole, thereby adjusting an amount of flow of the residues of the plastic material discharging therethrough. 21. The discharge apparatus of claim 20, wherein the flow-regulating unit comprises from an adjustable bolt, an adjustable spring disposed between a movable leakage stop block and an adjustable bolt, or an adjustable shaft. 22. The discharge apparatus of claim 20, wherein the check shaft is rotatable to open the runner to supply the plastic material during feeding of the plastic material, and is rotatable to close the runner to stop supplying the plastic material when feeding of the plastic material is stopped.