CN209987314U - Water-cooled injection mold core - Google Patents
Water-cooled injection mold core Download PDFInfo
- Publication number
- CN209987314U CN209987314U CN201920701773.0U CN201920701773U CN209987314U CN 209987314 U CN209987314 U CN 209987314U CN 201920701773 U CN201920701773 U CN 201920701773U CN 209987314 U CN209987314 U CN 209987314U
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- China
- Prior art keywords
- mold core
- cooling water
- cavity
- main body
- injection mold
- 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 - Fee Related
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- 238000002347 injection Methods 0.000 title claims abstract description 20
- 239000007924 injection Substances 0.000 title claims abstract description 20
- 239000000498 cooling water Substances 0.000 claims abstract description 73
- 238000005452 bending Methods 0.000 claims abstract description 7
- 238000001746 injection moulding Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 230000003139 buffering effect Effects 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model belongs to the technical field of the injection mold technique and specifically relates to a water-cooled injection mold core. Including the mold core main part that has the cavity, its characterized in that: a cooling water flow channel is arranged in the side wall of the mold core main body; the cooling water flow passage includes a curved section that surrounds in a radial direction of the core body. In the technical scheme, the cooling water flow channel is formed in the side wall of the mold core main body, and compared with the independent design of the mold core and the hollow pipe in the prior art, the structure is simpler, and the heat dissipation effect is better. The bending section of the cooling water flow channel is radially surrounded by the mold core main body, so that the flow speed of the cooling water from the bottom to the top is stable when the mold core is horizontally placed, and the heat dissipation is uniform.
Description
Technical Field
The utility model belongs to the technical field of the injection mold technique and specifically relates to a water-cooled injection mold core.
Background
The mold core is a common mold structure for molding plastic parts with hollow structures. As shown in fig. 1-3, a conventional core structure a has a cylindrical cavity a1 and a hollow tube a2 disposed within cavity a 1. The cooling water flows into the cavity A1 from the hollow pipe A2, turns back at the bottom of the cavity A1, and flows out from the inlet of the cavity A1. The residence time of the cooling water in the mold core is short, and the cooling water which just enters the mold core sinks due to the horizontal arrangement of the mold core, so that the flow rate of the cooling water from the bottom to the top in the cavity A1 is different, and the heat dissipation temperature is uneven.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the application provides a water-cooled injection mold core, including the mold core main part that has the cavity, its characterized in that:
a cooling water flow channel is arranged in the side wall of the mold core main body;
the cooling water flow passage includes a curved section that surrounds in a radial direction of the core body.
In the technical scheme, the cooling water flow channel is formed in the side wall of the mold core main body, and compared with the independent design of the mold core and the hollow pipe in the prior art, the structure is simpler, and the heat dissipation effect is better. The bending section of the cooling water flow channel is radially surrounded by the mold core main body, so that the flow speed of the cooling water from the bottom to the top is stable when the mold core is horizontally placed, and the heat dissipation is uniform.
Preferably, one end of the mold core main body is closed, and the outer surface of the mold core main body is provided with a forming part which is used for being matched and formed with the injection molding inner cavity; the other end of the mold core main body is provided with a cooling water inlet and a cooling water outlet, the cooling water inlet is communicated with the cavity, and the cooling water outlet is communicated with an outlet of the cooling water flow channel; and one side of the cavity, which is close to the forming part, is provided with a reducing part for communicating the inlet of the cooling water flow channel.
Preferably, the reduced diameter portion is communicated with the cooling water flow passage through at least one L-shaped bent pipe.
Preferably, the cavity is a cylindrical cavity; the radius of the cross section of the cylindrical cavity is more than twice of the maximum radius of the cooling water flow channel.
Preferably, the inner surface of the side wall of the reducing part is provided with a spiral buffering thread.
Preferably, the cooling water flow passage comprises a spiral flow passage formed by connecting a plurality of the bent sections end to end.
Preferably, the cooling water flow passage includes a plurality of annular flow passages arranged along the axial direction of the cavity and an axial flow passage sequentially communicating with the annular flow passages along the axial direction of the cavity.
Preferably, the axial flow passage has a plurality and the plurality of axial flow passages are uniformly distributed in a cross-sectional circumferential direction of the cavity.
Preferably, a through hole communicated with the bending section is formed in the surface of the mold core main body, and a sealing plug is installed at the through hole.
Preferably, an opening of the through hole near the inner side of the core main body is smaller than an opening of the through hole near the outer side of the core main body.
The utility model discloses following beneficial effect has:
1. compared with the independent design of the mold core and the hollow pipe in the prior art, the cooling water flow channel is formed in the side wall of the mold core main body, the structure is simpler, and the heat dissipation effect is better.
2. The bending section of the cooling water flow channel is radially surrounded by the mold core main body, so that the flow speed of the cooling water from the bottom to the top is stable when the mold core is horizontally placed, and the heat dissipation is uniform.
3. The reducing part gradually increases the flow velocity of water flow entering the cooling water flow channel from the cavity, and reduces the water pressure impact on the molding part of the die core main body.
4. The axial flow channel is communicated with the plurality of annular flow channels, so that the condition that the cooling water flow channel is blocked can be reduced, and meanwhile, the contact area between the cooling water and the side wall of the mold core can be increased.
5. The structural design of the through holes is convenient for cleaning when the cooling water flow passage is blocked.
Drawings
FIG. 1 is a side view of a prior art mold core.
FIG. 2 is a cross-sectional perspective view of the prior art mold core taken along section line D-D in FIG. 1.
FIG. 3 is a cross-sectional view of the prior art mold core taken along section line D-D in FIG. 1.
Fig. 4 is a side view of a mold core according to a first embodiment of the present invention.
Fig. 5 is a cross-sectional view of the mold core of the first embodiment of the present invention taken along the line a-a in fig. 4.
Fig. 6 is a cross-sectional view of the mold core according to the first embodiment of the present invention, taken along the cross-sectional line B-B in fig. 4.
Fig. 7 is a cross-sectional view of the mold core according to the first embodiment of the present invention, taken along the circular line C in fig. 4.
Fig. 8 is a cross-sectional view of the mold core according to the first embodiment of the present invention, taken along the ring C in fig. 4.
Fig. 9 is a side view of a mold core according to a second embodiment of the present invention.
Fig. 10 is a sectional view of the mold core according to the second embodiment of the present invention, taken along the sectional line a-a in fig. 9.
Fig. 11 is a sectional view of the mold core according to the second embodiment of the present invention, taken along the sectional line B-B in fig. 9.
Fig. 12 is a sectional view of the mold core according to the second embodiment of the present invention, taken along the circular line C in fig. 9.
Fig. 13 is a cross-sectional view of the mold core according to the second embodiment of the present invention, cut along the ring C in fig. 9.
Fig. 14 is a sectional view of the mold core according to the second embodiment of the present invention, taken along the sectional line D-D in fig. 10.
Detailed Description
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless otherwise defined, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that the conventional terms should be interpreted as having a meaning that is consistent with their meaning in the relevant art and this disclosure. This disclosure is to be considered as an example of the invention and is not intended to limit the invention to the particular embodiments.
Example one
A water-cooled injection mold core as shown in fig. 4-8, comprising a mold core body 1. The mold core body 1 is closed at one end and is provided with a molding part (not shown) on the outer surface thereof for matching with the injection cavity to mold an injection molding piece. The surface shape of the molding part is designed according to the surface shape of the injection molding plastic part, the molding part of the mold core extends into the injection molding inner cavity, and then molten plastic is injected into the injection molding inner cavity, so that the shape of the injection molding part is formed. A cavity 2 is opened from the other end of the core body 1 toward the inside of the core body, and thus has a cooling water inlet 31 into which cooling water flows. The cavity 2 in this embodiment is a cylindrical cavity, and a reducing portion 21 is disposed on a side of the cavity 2 close to the forming portion, in this embodiment, the diameter of the reducing portion 21 is a tapered hole gradually reduced from a side close to the cooling water inlet toward a side close to the forming portion, and an outlet side of the reducing portion (i.e., a side close to the forming portion) is communicated with the cooling water flow passage 4 disposed in the sidewall of the core body 1 through one or more L-shaped bent pipes 22. The cooling water flow passage 4 includes a plurality of curved sections that are circumferentially arranged in the sidewall in the radial direction of the core body 1 and are equally spaced in the axial direction of the core body 1, and these curved sections are connected end to form a spiral flow passage that is circumferentially arranged in the radial direction of the core body 1. The sections of the spiral flow passage have the same radius, and the flow speed of the cooling water flowing through the sections is uniform. Preferably, the radius of the cross section of the cylindrical cavity in this embodiment is greater than twice the radius of the cross section of the helical flow channel. The spiral flow channel extends from the end of the molding part of the mold core main body 1 to the end of the cooling water inlet, and a cooling water outlet 32 for flowing out of the cooling water is formed on the end surface of the side of the cooling inlet. In this embodiment, the cooling water channel 4 is formed in the side wall of the mold core main body, and compared with the independent design of the mold core and the hollow tube in the prior art, the structure is simpler, and the heat dissipation effect is better. The bending section of the cooling water flow channel radially surrounds the mold core main body, so that the flow speed of the cooling water from the bottom to the top is stable when the mold core is horizontally placed, and the heat dissipation is uniform. The cross section radiuses of the cavity and the cooling water flow channel are reasonably designed, and the cooling effect is better. The radial cooling water flow channel bending section that encircles in the lateral wall also encircles around the cavity as the passageway that flows in the cooling water for the bent section of flowing through has absorbed partial thermal cooling water, can also carry out the heat exchange with the lower cooling water of the temperature that just got into in the inside cavity, makes the cooling water keep lower temperature throughout in the cooling water flow channel, has lasting heat-absorbing capacity, and makes the mold core heat dissipation more even. Preferably, the inner surface of the side wall of the diameter-reducing portion is provided with a spiral buffer thread. The flow velocity of water flow entering the cooling water channel from the cavity is gradually increased, and the water pressure impact on the molding part of the die core main body is reduced.
Since the spiral flow channels are located in the side walls of the core body, the entire core body needs to be replaced if a blockage occurs. The mold core of the embodiment is provided with a through hole B51 communicated with the bent section on the surface of the mold core main body, and a sealing plug 52 is arranged at the through hole 51. The through hole 51 is a tapered opening with an opening close to the inner side of the mold core body smaller than an opening of the through hole close to the outer side of the mold core body. The sealing plug may have a conical plug of the sealing ring. The through hole is blocked by the sealing plug 52 in normal use, so that the cooling water can flow out through the cooling water outlet along the cooling water flow passage. When a certain bent section of the cooling water flow passage is blocked, the sealing plug at the corresponding position can be opened for dredging.
Example two
The same parts of this embodiment and the first embodiment are not repeated herein, and as shown in fig. 9 to 14, the difference between the water-cooled injection mold core of this embodiment and the first embodiment is that the curved section of the cooling water channel 4 is a plurality of annular channels 41 arranged at equal intervals along the axial direction of the cavity 2, and the cooling water channel further includes axial channels 42 sequentially communicating with the annular channels 41 along the axial direction of the cavity 2. The axial flow passage in the present embodiment has a plurality, and the plurality of axial flow passages 42 are uniformly distributed in the cross-sectional circumferential direction of the cavity 2. The design of the plurality of axial flow channels 42 can enable the cooling water to be uniformly radiated through the annular flow channel 41, and the cooling water distribution among all parts of the annular flow channel and among all the annular flow channels can be more uniform. The axial flow channel is communicated with the plurality of annular flow channels, so that the condition that the cooling water flow channel is blocked can be reduced, and meanwhile, the contact area between the cooling water and the side wall of the mold core can be increased.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various changes or modifications within the scope of the appended claims.
Claims (10)
1. The utility model provides a water-cooled injection mold core, includes the mold core main part that has the cavity, its characterized in that:
a cooling water flow channel is arranged in the side wall of the mold core main body;
the cooling water flow passage includes a curved section that surrounds in a radial direction of the core body.
2. The water-cooled injection mold core according to claim 1, characterized in that:
one end of the mold core main body is closed, and the outer surface of the mold core main body is provided with a forming part which is used for being matched and formed with the injection molding inner cavity;
the other end of the mold core main body is provided with a cooling water inlet and a cooling water outlet, the cooling water inlet is communicated with the cavity, and the cooling water outlet is communicated with an outlet of the cooling water flow channel;
and one side of the cavity, which is close to the forming part, is provided with a reducing part for communicating the inlet of the cooling water flow channel.
3. The water-cooled injection mold core according to claim 2, characterized in that:
the reducing part is communicated with the cooling water flow channel through at least one L-shaped bent pipe.
4. The water-cooled injection mold core according to claim 1, characterized in that:
the cavity is a cylindrical cavity;
the radius of the cross section of the cylindrical cavity is more than twice of the maximum radius of the cooling water flow channel.
5. The water-cooled injection mold core according to claim 2, characterized in that:
the inner surface of the side wall of the reducing part is provided with spiral buffering grains.
6. The water-cooled injection mold core according to claim 2, characterized in that:
the cooling water flow passage comprises a spiral flow passage formed by connecting a plurality of bent sections end to end.
7. The water-cooled injection mold core according to claim 2, characterized in that:
the cooling water flow channel comprises a plurality of annular flow channels which are axially arranged along the cavity and axial flow channels which are sequentially communicated with the annular flow channels along the axial direction of the cavity.
8. The water-cooled injection mold core according to claim 7, characterized in that:
the axial flow passage is provided with a plurality of axial flow passages, and the plurality of axial flow passages are uniformly distributed in the circumferential direction of the section of the cavity.
9. The water-cooled injection mold core according to claim 1, characterized in that:
the surface of the mold core main body is provided with a through hole communicated with the bending section, and a sealing plug is arranged at the through hole.
10. The water-cooled injection mold core according to claim 9, characterized in that:
the opening of the through hole close to the inner side of the mold core main body is smaller than the opening of the through hole close to the outer side of the mold core main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920701773.0U CN209987314U (en) | 2019-05-16 | 2019-05-16 | Water-cooled injection mold core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920701773.0U CN209987314U (en) | 2019-05-16 | 2019-05-16 | Water-cooled injection mold core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209987314U true CN209987314U (en) | 2020-01-24 |
Family
ID=69294402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920701773.0U Expired - Fee Related CN209987314U (en) | 2019-05-16 | 2019-05-16 | Water-cooled injection mold core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209987314U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110039723A (en) * | 2019-05-16 | 2019-07-23 | 福建成和光电科技有限公司 | A kind of water-cooled injection core |
-
2019
- 2019-05-16 CN CN201920701773.0U patent/CN209987314U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110039723A (en) * | 2019-05-16 | 2019-07-23 | 福建成和光电科技有限公司 | A kind of water-cooled injection core |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200124 |