CN215921072U - Split die cavity bottom structure - Google Patents
Split die cavity bottom structure Download PDFInfo
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- CN215921072U CN215921072U CN202121509176.1U CN202121509176U CN215921072U CN 215921072 U CN215921072 U CN 215921072U CN 202121509176 U CN202121509176 U CN 202121509176U CN 215921072 U CN215921072 U CN 215921072U
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- cavity bottom
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- sprue
- sleeve
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Abstract
A split die cavity bottom structure comprises a die cavity bottom inner sleeve and a die cavity bottom positioning sleeve, wherein the die cavity bottom inner sleeve is sleeved in the die cavity bottom positioning sleeve, a cooling cavity for cooling the die cavity bottom is arranged between the outer wall of the die cavity bottom inner sleeve and the inner wall of the die cavity bottom positioning sleeve, the die cavity bottom inner sleeve comprises a molding section, a sprue section and an injection section which are sequentially arranged along a central axis, a molding surface for molding the bottom of a bottle blank is arranged in the molding section, a sprue channel for connecting a sprue nozzle is arranged in the sprue section, a containing cavity matched with the injection nozzle is arranged in the injection section, and the die cavity bottom is arranged into a split structure, so that the die cavity bottom inner sleeve and the die cavity bottom positioning sleeve are matched to form a cooling cavity capable of covering the whole molding surface, and the cooling effect of the die cavity bottom is optimal; meanwhile, the molding surface, the sprue channel and the containing cavity which are integrally molded are arranged in the inner sleeve at the bottom of the mold cavity, so that the processing and the replacement of the bottom of the mold cavity are more facilitated.
Description
Technical Field
The utility model relates to the technical field of bottle blank molds, in particular to a split mold cavity bottom structure.
Background
Because the PET bottle blank has higher molding temperature, large molding shrinkage and long production period, the cooling effect of the blank bottom of the bottle blank is very important for the molding quality and the production period of a bottle blank product, and the subsequent bottle blowing production is influenced.
As shown in figure 1, the bottle blank is formed by integrally forming a bottle opening (A), a bottle blank inner cavity (B), a blank body (C) and a blank bottom (D). Wherein the bottom of the mold cavity is distributed at the position of the injection gate of the whole mold cavity, and the bottom of the bottle blank is the highest part of the whole molding temperature, so that the waterway design at the bottom of the mold cavity plays a critical role in cooling the bottom of the blank.
At present, most conventional designs at the bottom of the digital mold cavity are of an integral structure, a water channel can only be cooled by water in a mode of drilling hexagonal holes, the molding at the bottom of the mold cavity can only be cooled to a part in such a cooling mode, and the cooling effect is not good enough.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a split die cavity bottom structure.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
a split die cavity bottom structure comprises a die cavity bottom inner sleeve and a die cavity bottom positioning sleeve, wherein the die cavity bottom inner sleeve is sleeved in the die cavity bottom positioning sleeve, a cooling cavity for cooling the die cavity bottom is arranged between the outer wall of the die cavity bottom inner sleeve and the inner wall of the die cavity bottom positioning sleeve, the die cavity bottom inner sleeve comprises a molding section, a sprue section and an injection section which are sequentially arranged along a central axis, a molding surface for molding the bottom of a bottle blank is arranged in the molding section, a sprue channel for connecting a sprue nozzle is arranged in the sprue section, a containing cavity matched with the injection nozzle is arranged in the injection section, the molding surface is communicated with the containing cavity through the sprue channel, the cooling cavity is arranged in an interval between the molding section and the sprue section and matched with the die cavity bottom positioning sleeve, the die cavity bottom inner sleeve is matched with the die cavity bottom positioning sleeve to form a sealing section, and the mold cavity bottom positioning sleeve is provided with a water inlet channel and a water outlet channel which are communicated with the cooling cavity at positions corresponding to the sprue section.
As a further improvement of the utility model, the end face of the forming section is provided with a positioning flange for installation and positioning, the positioning flange is arranged at one end of the forming section far away from the sprue section, the positioning flange is protruded along the periphery of the end face of the forming section, and the positioning flange abuts against the end face of the mold cavity bottom positioning sleeve.
As a further improvement of the utility model, the water inlet channel and the water outlet channel are symmetrically arranged at 180 degrees relative to the central axis of the die cavity bottom positioning sleeve.
As a further improvement of the utility model, the outer wall of the inner sleeve at the bottom of the mold cavity is matched in shape to the inner molding surface, the gate channel and the receiving cavity.
As a further improvement of the present invention, the outer wall of the injection section is provided with a first sealing groove, and the first sealing groove is sleeved with a first sealing ring for sealing the sealing section.
As a further improvement of the utility model, the end face of the positioning flange is provided with a second sealing groove, and the second sealing groove is arranged at one end far away from the gate section.
As a further improvement of the utility model, a third sealing groove is formed in the outer side wall of the die cavity bottom positioning sleeve.
The utility model has the beneficial effects that: according to the utility model, the mold cavity bottom is designed into a split structure, and the inner sleeve of the mold cavity bottom and the positioning sleeve of the mold cavity bottom are matched to form the cooling cavity capable of covering the whole molding surface, so that the cooling effect of the mold cavity bottom is optimal; meanwhile, the molding surface, the sprue channel and the containing cavity which are integrally molded are arranged in the inner sleeve at the bottom of the mold cavity, so that the processing and the replacement of the bottom of the mold cavity are more facilitated.
Drawings
The utility model is further illustrated by the following figures and embodiments:
FIG. 1 is a schematic view of a bottle preform;
FIG. 2 is a schematic structural diagram of a mold cavity bottom according to the present embodiment;
FIG. 3 is a schematic view of the internal structure of the cavity bottom according to the present embodiment;
FIG. 4 is a schematic structural view of the inner sleeve at the bottom of the mold cavity in this embodiment;
FIG. 5 is a schematic view of the internal structure of the inner sleeve at the bottom of the mold cavity in this embodiment;
FIG. 6 is a schematic structural view of a mold cavity bottom positioning sleeve according to the present embodiment;
fig. 7 is a schematic view of the internal structure of the cavity bottom positioning sleeve of the present embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
Example (b):
as shown in fig. 2 to 7, the present embodiment discloses a split mold cavity bottom structure, which includes a mold cavity bottom inner sleeve 1 and a mold cavity bottom positioning sleeve 2, wherein the mold cavity bottom inner sleeve 1 is sleeved in the mold cavity bottom positioning sleeve 2, a cooling cavity 3 for cooling the mold cavity bottom is disposed between an outer wall of the mold cavity bottom inner sleeve 1 and an inner wall of the mold cavity bottom positioning sleeve 2, the mold cavity bottom inner sleeve 1 includes a molding section 11, a gate section 12 and an injection section 13 sequentially disposed along a central axis, a molding surface 14 for molding a bottle blank bottom is disposed inside the molding section 11, a gate channel 15 for connecting a nozzle is disposed inside the gate section 12, an accommodating cavity 16 matched with an injection nozzle is disposed inside the injection section 13, the molding surface 14 is communicated with the accommodating cavity 16 through the gate channel 15, the cooling cavity 3 is disposed in an interval region between the molding section 11 and the gate section 12 and the mold cavity bottom positioning sleeve 2, the mold cavity bottom inner sleeve 1 and the mold cavity bottom positioning sleeve 2 are matched at the injection section 13 to form a sealing section 4, and the mold cavity bottom positioning sleeve 2 is provided with a water inlet channel 21 and a water outlet channel 22 which are communicated to the cooling cavity 3 at positions corresponding to the sprue section 12. Before injection molding of a bottle blank, a mold cavity bottom inner sleeve 1 is sleeved into a mold cavity bottom positioning sleeve 2 to realize matching to form an integral part and is arranged in a mold cavity fixing plate of an injection mold, then the injection mold and a hot runner mold are assembled and arranged on a machine head, at the moment, an injection nozzle enters a containing cavity 16 to be matched for injection molding, a material body injected by the injection nozzle enters a molding surface 14 through a sprue channel 15 during injection molding, meanwhile, cooling water at the mold cavity bottom enters a cooling cavity 3 from a water inlet channel 21, and flows out from a water outlet channel 22 after the molding surface 14 is fully cooled through the cooling cavity 3. The mold cavity bottom is designed into a split structure, and the inner sleeve 1 of the mold cavity bottom and the positioning sleeve 2 of the mold cavity bottom are matched to form a cooling cavity 3 which can cover the whole molding surface 14, so that the cooling effect of the mold cavity bottom is optimal; meanwhile, the integrally formed molding surface 14, the gate channel 15 and the accommodating cavity 16 are arranged in the inner sleeve 1 at the bottom of the mold cavity, so that the processing and the replacement of the bottom of the mold cavity are facilitated.
In a preferred embodiment, in order to better and more conveniently realize the installation and positioning of the inner die cavity bottom sleeve 1 and the die cavity bottom positioning sleeve 2, the end surface of the forming section 11 is provided with a positioning flange 17 for installation and positioning, the positioning flange 17 is arranged at one end of the forming section 11 far away from the gate section 12, the positioning flange 17 protrudes along the periphery of the end surface of the forming section 11, and the positioning flange 17 abuts against the end surface of the die cavity bottom positioning sleeve 2. In the present embodiment, the positioning flange 17 and the sealing section 4 respectively serve as a sealing structure at two ends of the cooling cavity 3, so that the cooling water flows in the cooling cavity 3 without overflowing.
As a preferred embodiment, the water inlet channel 21 and the water outlet channel 22 are symmetrically arranged at 180 ° with respect to the central axis of the cavity bottom positioning sleeve 2, and after the cooling water flows into the cooling cavity 3 from the water inlet channel 21, the cooling water is divided from two sides of the cooling cavity 3 and then flows out from the water outlet channel 22, so that the cooling uniformity and the cooling efficiency of the cooling cavity 3 are both improved. Further, the outer wall shape of the inner housing 1 at the bottom of the mold cavity matches the shape of the inner molding surface 14, the gate passage 15 and the receiving cavity 16. The molding section 11 and the gate section 12 are arranged into water channel cooling cavities with the same wall thickness along with molding, so that the bottom of the mold cavity is sufficiently and uniformly cooled.
As a preferred embodiment, in order to fully improve the sealing performance of the cavity bottom, the outer wall of the injection section 13 is provided with a first sealing groove 18, and the first sealing ring 5 is sleeved on the first sealing groove 18 for sealing the sealing section 4. The end face of the positioning flange 17 is provided with a second sealing groove 19, and the second sealing groove 19 is arranged at one end far away from the gate section 12. And a third sealing groove 23 is formed in the outer side wall of the die cavity bottom positioning sleeve 2. In this embodiment, the third seal groove 23 is provided with two square seal grooves 24 having a square cross section, and the other one is a tapered seal groove 25 having a tapered cross section, so as to realize a comprehensive seal.
The above description is only a preferred embodiment of the present invention, and the technical solutions that achieve the objects of the present invention by substantially the same means are within the protection scope of the present invention.
Claims (7)
1. The utility model provides a divide die cavity bottom structure which characterized in that: comprises a die cavity bottom inner sleeve and a die cavity bottom positioning sleeve, wherein the die cavity bottom inner sleeve is sleeved in the die cavity bottom positioning sleeve, a cooling cavity for cooling the bottom of the die cavity is arranged between the outer wall of the die cavity bottom inner sleeve and the inner wall of the die cavity bottom positioning sleeve, the die cavity bottom inner sleeve comprises a molding section, a gate section and an injection section which are sequentially arranged along a central axis, a molding surface for molding the bottom of the bottle blank is arranged in the molding section, a sprue channel for connecting a nozzle is arranged in the sprue section, an accommodating cavity matched with the injection nozzle is arranged in the injection section, the molding surface is communicated with the containing cavity through a sprue channel, the cooling cavity is arranged in an interval between the molding section and the sprue section which are relatively matched with the mold cavity bottom positioning sleeve, the die cavity bottom inner sleeve and the die cavity bottom positioning sleeve are matched with the injection section to form a sealing section, and a water inlet channel and a water outlet channel communicated to the cooling cavity are formed in the positions, relative to the sprue section, of the die cavity bottom positioning sleeve.
2. The split cavity bottom structure according to claim 1, wherein: the end face of the forming section is provided with a positioning flange for installation and positioning, the positioning flange is arranged at one end, away from the sprue section, of the forming section, the positioning flange protrudes along the periphery of the end face of the forming section, and the positioning flange abuts against the end face of the mold cavity bottom positioning sleeve.
3. The split cavity bottom structure according to claim 1, wherein: the water inlet channel and the water outlet channel are symmetrically arranged at an angle of 180 degrees relative to the central axis of the die cavity bottom positioning sleeve.
4. The split cavity bottom structure according to claim 1, wherein: the outer wall shape of the die cavity bottom inner sleeve is matched with the shapes of the inner molding surface, the sprue channel and the containing cavity.
5. The split cavity bottom structure according to claim 1, wherein: the outer wall of the injection section is provided with a first sealing groove, and a first sealing ring is sleeved on the first sealing groove and used for sealing the sealing section.
6. The split cavity bottom structure according to claim 2, wherein: and a second sealing groove is formed in the end face of the positioning flange, and is formed in one end far away from the gate section.
7. The split cavity bottom structure according to claim 1, wherein: and a third sealing groove is formed in the outer side wall of the die cavity bottom positioning sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121509176.1U CN215921072U (en) | 2021-07-02 | 2021-07-02 | Split die cavity bottom structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121509176.1U CN215921072U (en) | 2021-07-02 | 2021-07-02 | Split die cavity bottom structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215921072U true CN215921072U (en) | 2022-03-01 |
Family
ID=80400693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121509176.1U Active CN215921072U (en) | 2021-07-02 | 2021-07-02 | Split die cavity bottom structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215921072U (en) |
-
2021
- 2021-07-02 CN CN202121509176.1U patent/CN215921072U/en active Active
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