IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0106885
(2002-03-22)
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우선권정보 |
DE-0014414 (2001-03-23) |
발명자
/ 주소 |
- Eckardt, Helmut
- van der Steen, Stephan
- W?lfrath, Marc
- Schwesinger, Rolf
- Bielich, Norbert
|
출원인 / 주소 |
|
대리인 / 주소 |
Hamilton, Brook, Smith &
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인용정보 |
피인용 횟수 :
0 인용 특허 :
6 |
초록
▼
Device and process for injection molding of molded parts made from plastic material having at least one cavity, which has means for injecting plastic melt into the cavity of an injection-molding die along a melt flow path and means for injecting a fluid into the still molten plastic material, wherei
Device and process for injection molding of molded parts made from plastic material having at least one cavity, which has means for injecting plastic melt into the cavity of an injection-molding die along a melt flow path and means for injecting a fluid into the still molten plastic material, wherein the means for injecting a fluid are designed in order to inject a liquid at preset pressure and preset quantity. Provision is made in that the means for injecting a liquid includes a first part element, which is arranged centrally and remote from the injection-molding die and supplies at least one injection-molding die, and includes at least one second part element, which is arranged in the immediate vicinity of the injection-molding die, and a third part element, which is arranged locally on the injection-molding die at least during injection of the liquid.
대표청구항
▼
1. Device for injection molding of molded parts made from plastic material having at least one cavity, which has means for injecting plastic melt into a cavity of an injection-molding die along a melt flow path, and means for injecting a fluid into the still molten plastic material, wherein the mean
1. Device for injection molding of molded parts made from plastic material having at least one cavity, which has means for injecting plastic melt into a cavity of an injection-molding die along a melt flow path, and means for injecting a fluid into the still molten plastic material, wherein the means for injecting the fluid are designed in order to inject a liquid at preset pressure and preset quantity, the means for injecting a liquid including a first part element which is arranged centrally and remote from the injection-molding die and supplies at least one injection-molding die, and including at least one second part element, which is arranged in the immediate vicinity of the injection-molding die, and a third part element, which is arranged locally on the injection-molding die at least during injection of the liquid, the plastic melt being injected into a first opening in the injection-molding die and the fluid being injected into a second opening in the injection-molding die.2. Device according to claim 1, wherein the second and third part element are assigned in each case to only one cavity.3. Device according to claim 1, wherein the first part element has at least one reservoir for liquids.4. Device according to claim 1, wherein the first part element is a supply pipe for liquid.5. Device according to claim 1, wherein the liquid includes water.6. Device according to claim 1, wherein the first part element includes at least one reservoir for liquid and a ring pipe.7. Device according to claim 1, wherein the first part element includes at least one first reservoir for liquid and a second reservoir for compressed gas.8. Device according to claim 7, wherein the gas includes nitrogen.9. Device according to claim 1, wherein the second part element is a device for the control and/or regulation of the fluid pressure and the third part element is a fluid injection element.10. Device according to claim 9, wherein the second part element includes at least one pressure-regulating module.11. Device according to claim 10, wherein the device for the control and/or regulation of the fluid pressure includes a pressure-regulating module and a liquid store.12. Device according to claim 10, wherein the device for the control and/or regulation of the fluid pressure includes a pressure-regulating module and a combined liquid/gas store.13. Device according to claim 11, wherein a pump is arranged upstream of the device for the control and/or regulation of the fluid pressure in order to increase the pressure.14. Device according to claim 1, wherein the first part element and/or the second part element have tempering means, with which the liquid can be brought to the required temperature.15. Device according to claim 14, wherein at least one mixing fixture, with which the liquid to be injected into the injection-molding die is mixed to a required temperature, is arranged between the at least two liquid reservoirs and the injection-molding die.16. Process for injection molding of molded parts made from plastic material having at least one cavity, which includes:a) injection of plastic melt into the cavity of an injection-molding die from an injection unit along a melt flow path and through a first opening in the injection-molding die b) injection of a fluid into the still molten plastic material, so that the latter is pressed against the walls of the cavity, the fluid being injected into a second opening in the injection-molding die; c) allowing the plastic material to solidify until it forms the molded part in self-supporting manner; and d) releasing the molded part from the cavity of the injection-molding die; liquid being used as the fluid, which is injected at a preset pressure and a preset quantity, the liquid passing from a first part element of a means for injecting the liquid, which is arranged centrally, via a second part element of the means for injecting the liquid, which is arranged in the vicinity of the injection-molding die, to a third part element of a means for injecting the liquid, which is arranged locally on the injection-molding die, and is injected by the latter into the plastic melt. 17. Device for injection molding parts made from a plastic material, comprising:an injection unit for injecting plastic melt into a first opening in an injection-molding die; and a liquid injection unit for injecting a liquid into a second opening in the injection-molding die, including: a first part element disposed remotely from the injection-molding die; at least one second part element disposed in the immediate vicinity of the injection-molding die; and a third part element disposed locally on the injection-molding die at least during injection of the liquid. 18. Process for injection molding to form a molded part, comprising:injecting plastic melt into a first opening in an injection-molding die; and injecting a liquid into a second opening in the injection-molding die, the liquid passing from a first part element of a liquid injection unit, the first part element being disposed remotely from the injection-molding die, through a second part element of the liquid injection unit disposed in the immediate vicinity of the injection-molding die, and injected into the injection-molding die by a third part element of the liquid injection unit disposed locally on the injection-molding die. 19. Process according to claim 18, wherein the liquid is injected into the injection-molding die while the plastic melt is still melted to push the plastic melt against at least one wall of the injection-molding die to form at least one cavity in molded part.
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