CA2224796C - Injection molding apparatus with cooled core - Google Patents
Injection molding apparatus with cooled core Download PDFInfo
- Publication number
- CA2224796C CA2224796C CA 2224796 CA2224796A CA2224796C CA 2224796 C CA2224796 C CA 2224796C CA 2224796 CA2224796 CA 2224796 CA 2224796 A CA2224796 A CA 2224796A CA 2224796 C CA2224796 C CA 2224796C
- Authority
- CA
- Canada
- Prior art keywords
- cooled core
- cooling tube
- extending
- body portion
- injection molding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C45/7312—Construction of heating or cooling fluid flow channels
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Injection molding hot runner apparatus having a cooled mold core with an elongated body portion with a front portion or head. A cooling tube extends centrally in body portion of the mold core. A cooling fluid circuit extends from the open front end of the cooling tube outwardly through a number of spaced radial bores. Each radial bore connects to an L-shaped duct leading back to a cylindrical space around the cooling tube.
Claims (22)
1. In an injection molding hot runner apparatus having at least one heated nozzle seated in a cooled mold to convey melt to a gate leading to a cavity, and at least one cooled core having an elongated body portion, a central bore, and a front end to provide the at least one cooled core with a front portion having an outer surface forming one side of at least a portion of the cavity extending around the front portion of the cooled core, the cooled core having a central cooling tube extending in the central bore of the cooled core with a first cylindrical space extending between the cooling tube and the surrounding body portion of the cooled core, the central cooling tube having an open front end inside the front portion of the cooled core, whereby a cooling fluid circuit is provided extending inside the cooling tube and along the first cylindrical space outside the cooling tube to cool the cooled core, the improvement wherein;
the front portion of the at least one cooled core has a plurality of spaced openings extending outwardly therein through which the cooling fluid circuit extends, each opening having an inner end and an outer end, the inner end of each opening being located adjacent the open front end of the cooling tube to receive cooling fluid therefrom, the outer end of each opening being connected by rearwardly and inwardly extending cooling fluid flow means to the first cylindrical space extending rearwardly between the cooling tube and the surrounding body portion of the cooled core.
the front portion of the at least one cooled core has a plurality of spaced openings extending outwardly therein through which the cooling fluid circuit extends, each opening having an inner end and an outer end, the inner end of each opening being located adjacent the open front end of the cooling tube to receive cooling fluid therefrom, the outer end of each opening being connected by rearwardly and inwardly extending cooling fluid flow means to the first cylindrical space extending rearwardly between the cooling tube and the surrounding body portion of the cooled core.
2. Injection molding apparatus as claimed in claim 1 wherein the outwardly extending spaced openings are radially extending bores.
3. Injection molding apparatus as claimed in claim 2 wherein the rearwardly and inwardly extending cooling fluid flow means comprises a plurality of spaced L-shaped ducts, each L-shaped duct having a rear end and an inner end, the rear end being connected to the outer end of one of the radially extending bores, the inner end being connected to the first cylindrical space extending rearwardly between the cooling tube and the surrounding body portion of the cooled core.
4. Injection molding apparatus as claimed in claim 3 wherein the front portion of the at least one cooled core comprises a head which is substantially larger in diameter than the rest of the cooled core.
5. Infection molding apparatus as claimed in claim 4 wherein the rearwardly and inwardly extending cooling fluid flow means comprises a second cylindrical space extending rearwardly to a rear end from the outer ends of the radially extending bores and a radially extending space extending inwardly from the rear and of the second cylindrical space to the first cylindrical space extending rearwardly between the cooling tube and the surrounding body portion of the cooled core.
6. Injection molding apparatus as claimed in claim 1 wherein the at least one cooled core comprises an insert integrally seated in the elongated body portion to form the front end of the cooled core, the insert having the plurality of spaced openings extending outwardly therethrough.
7. Injection molding apparatus as claimed in claim 6 wherein the outwardly extending spaced openings are radially extending bores.
8. Injection molding apparatus as claimed in claim 7 wherein the insert has a generally flat front end and a generally cylindrical outer surface fitting into a portion of the elongated body portion having a cylindrical inner wall, and the rearwardly and inwardly extending cooling fluid flow means comprises a plurality of spaced L-shaped grooves in the cylindrical outer surface and flat front end of the insert, each L-shaped groove having a rear end and an inner end, the rear end being connected to the outer end of one of the radially extending bores, the inner end being connected to the first cylindrical space extending rearwardly between the cooling tube and the surrounding body portion of the cooled core.
9. Injection molding apparatus as claimed in claim 8 wherein the front portion of the at least one cooled core comprises a head which is substantially larger in diameter than the rest of the cooled core.
10. An injection molding apparatus, comprising:
a melt passage for conveying hot melt;
a mold including a nozzle retainer plate and a cavity retainer plate; and a cooled core, wherein the nozzle retainer plate is provided with a heated nozzle in communication with the melt passage, the cavity retainer plate is provided with a cavity insert for forming one side of a cavity, and the cooled core is provided with a head with an outer surface for forming the other side of the cavity, whereby hot melt is conveyed through the melt passage, through the heated nozzle, through a gate, and into the cavity, and wherein the cooled core is provided with a cooling tube having one end extending into the head, and the head is provided with a plurality of spaced openings extending from the one end of the cooling tube, whereby a cooling fluid is circulated through the cooling tube and the spaced openings in order to cool the head of the cooled core.
a melt passage for conveying hot melt;
a mold including a nozzle retainer plate and a cavity retainer plate; and a cooled core, wherein the nozzle retainer plate is provided with a heated nozzle in communication with the melt passage, the cavity retainer plate is provided with a cavity insert for forming one side of a cavity, and the cooled core is provided with a head with an outer surface for forming the other side of the cavity, whereby hot melt is conveyed through the melt passage, through the heated nozzle, through a gate, and into the cavity, and wherein the cooled core is provided with a cooling tube having one end extending into the head, and the head is provided with a plurality of spaced openings extending from the one end of the cooling tube, whereby a cooling fluid is circulated through the cooling tube and the spaced openings in order to cool the head of the cooled core.
11. An injection molding apparatus in accordance with claim 10, wherein the cooled core comprises an elongated body portion and an insert, the elongated body portion having a central bore through which the cooling tube extends, the central bore extending outwardly at the head to a larger diameter seat to fit around the insert.
12. An injection molding apparatus in accordance with claim 10, wherein the head is substantially larger in diameter than the rest of the cooled core in order to provide increased cooling to the cavity.
13. An injection molding apparatus in accordance with claim 11, wherein the spaced openings are outwardly extending radial bores.
14. An injection molding apparatus in accordance with claim 13, wherein the radial bores communicate with L-shaped ducts formed when the insert and the elongated body portion are assembled together.
15. An injection molding apparatus in accordance with claim 11, wherein the elongated body portion and the insert are brazed together to form an integral cooled core.
16. An injection molding apparatus in accordance with claim 11, wherein the cooling tube is sufficiently smaller in diameter than the central bore to provide an elongated cylindrical space between the cooling tube and the elongated body portion, and wherein the spaced openings communicate cooling fluid through the head and between the cooling tube and the elongated cylindrical space.
17. A cooled core for cooling a mold cavity, comprising:
an elongated body portion with a head having an outer surface for forming one side of the mold cavity; and a cooling tube having one end extending into the head, the head being provided with a plurality of spaced openings extending from the one end of the cooling tube, whereby a cooling fluid is circulated through the cooling tube and the spaced openings in order to cool the head of the cooled core.
an elongated body portion with a head having an outer surface for forming one side of the mold cavity; and a cooling tube having one end extending into the head, the head being provided with a plurality of spaced openings extending from the one end of the cooling tube, whereby a cooling fluid is circulated through the cooling tube and the spaced openings in order to cool the head of the cooled core.
18. A cooled core in accordance with claim 17, wherein the head is substantially larger in diameter than the rest of the cooled core in order to provide increased cooling for the mold cavity.
19. A cooled core in accordance with claim 17, wherein the cooled core comprises an elongated body portion and an insert, the elongated body portion having a central bore through which the cooling tube extends, the central bore extending outwardly at the head to a larger diameter seat to fit around the insert.
20. A cooled core in accordance with claim 19, wherein the spaced openings are outwardly extending radial bores.
21. A cooled core in accordance with claim 20, wherein the radial bores communicate with L-shaped ducts formed when the insert and the elongated body portion are assembled together.
22. A cooled core in accordance with claim 19, wherein the cooling tube is sufficiently smaller in diameter than the central bore to provide an elongated cylindrical space between the cooling tube and the elongated body portion, and wherein the cooling fluid flows through the cooling tube, outward along the head, back in, and along the cylindrical space around the cooling tube.
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2224796 CA2224796C (en) | 1997-12-19 | 1997-12-19 | Injection molding apparatus with cooled core |
| SG1998000138A SG72784A1 (en) | 1997-01-24 | 1998-01-19 | Injection molding apparatus with cooled core |
| US09/008,995 US5935621A (en) | 1997-01-24 | 1998-01-20 | Injection molding apparatus having a cooled core |
| AT98101095T ATE275471T1 (en) | 1997-01-24 | 1998-01-22 | INJECTION MOLDING DEVICE WITH COOLED CORE |
| DE69826040T DE69826040T2 (en) | 1997-01-24 | 1998-01-22 | Injection molding device with cooled core |
| EP98101095A EP0855261B1 (en) | 1997-01-24 | 1998-01-22 | Injection molding apparatus with cooled core |
| DE19802387A DE19802387A1 (en) | 1997-01-24 | 1998-01-22 | Die-casting device with cooled core |
| JP01072998A JP4113610B2 (en) | 1997-01-24 | 1998-01-22 | Injection molding apparatus having cooling core |
| US09/928,230 USRE38265E1 (en) | 1997-01-24 | 2001-08-10 | Injection molding apparatus having a cooled core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2224796 CA2224796C (en) | 1997-12-19 | 1997-12-19 | Injection molding apparatus with cooled core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2224796A1 CA2224796A1 (en) | 1999-06-19 |
| CA2224796C true CA2224796C (en) | 2006-04-18 |
Family
ID=29275402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2224796 Expired - Lifetime CA2224796C (en) | 1997-01-24 | 1997-12-19 | Injection molding apparatus with cooled core |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2224796C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116714199B (en) * | 2023-08-04 | 2024-07-23 | 常州彤扬电气制造有限公司 | Feeding and discharging device for processing and conveying injection molding machine products |
-
1997
- 1997-12-19 CA CA 2224796 patent/CA2224796C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2224796A1 (en) | 1999-06-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20171219 |