CN215095551U - Die cavity heating and cooling structure applied to bidirectional stretching hollow blow molding die - Google Patents
Die cavity heating and cooling structure applied to bidirectional stretching hollow blow molding die Download PDFInfo
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- CN215095551U CN215095551U CN202120775428.9U CN202120775428U CN215095551U CN 215095551 U CN215095551 U CN 215095551U CN 202120775428 U CN202120775428 U CN 202120775428U CN 215095551 U CN215095551 U CN 215095551U
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Abstract
Be applied to die cavity heating cooling structure on biaxial stretching cavity blow molding mould, including the preceding mould and the back mould that surround into the die cavity, be located the die cavity bottom, be used for installing the die block board of die cavity and stretch the tensile pole of stretching into the die cavity from the die cavity top, be equipped with bearing mechanism in the die cavity, bearing mechanism includes that bearing rod and drive bearing rod stretch into the actuating mechanism at die cavity middle part, be equipped with heating element in preceding mould and/or the back mould, carry out the cooling module of cooling work after heating element work. The utility model discloses when the bottle blowing, utilize heating element to be front mould and back mould heating, let the temperature of front mould and back mould be close to bottle embryo temperature, avoid the too early cooling of bottle embryo, let bottle embryo redraw in-process plastic distribution more reasonable, the heating tube is closed when finalizing the design to the bottle, reduces front mould and back mould temperature through cooling module and makes the bottle cooling design, lets the bottle obtain better cooling design effect.
Description
Technical Field
The utility model relates to a fashioned technical field of blowing container, concretely relates to be applied to die cavity heating and cooling structure on biaxial stretching cavity blow molding mould.
Background
In the existing blow molding container forming process, particularly in the blow molding method of an injection-stretch-blow two-step method, the axial stretching of a bottle blank is basically realized by contacting the inner bottom of the bottle blank with a stretching rod (round steel rod) to stretch the bottle blank to the bottom of a mold cavity at one time. And injecting compressed air in the stretching process of the stretching rod, blowing the bottle blank by means of the compressed air to enable the bottle blank to be tightly attached to the cavity wall of the mold, and cooling and shaping to obtain the hollow plastic product. When the bottle blank is stretched to be in contact with metal at the bottom of the mold cavity, the bottom of the bottle blank is cooled relatively quickly, and the material with limited stretching space is difficult to fully stretch, so that material accumulation is formed at the bottom of the container, material waste is caused, stress concentration is generated, the bottom of the container is easy to crack, and the bottle blank is particularly serious on a large-capacity container (more than 5L). In addition, when the vertical stretching dimension of the bottle preform is large, the stretching rod is prone to have unstable rate, insufficient rigidity and eccentricity at the bottom of the bottle preform, so that the wall thickness of the blow-molded container is not uniform, and the overall strength of the container is affected.
Therefore, the company invents an axial bidirectional positioning stretching hollow blow molding method, and the specific technical scheme can refer to the Chinese patent with the patent application number of 201811527312.2, and the technical scheme basically solves the technical problems. But discovery in the use, because do not have heating system on the mould at present, its temperature is less than bottle base temperature far away, when the position of being born the weight of the bottom of the bottle base slows down tensile speed or pause tensile, because the bottle base inflation and press close to die cavity wall gradually, the temperature of bottle base is drawn down to the temperature on the mould to lead to the bottle base to appear the phenomenon of cooling in advance, make the bottle base appear that some material is difficult to pull open, plastics distribute evenly and easy problem such as ftracture.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a be applied to die cavity heating and cooling structure on biaxial stretching cavity blow molding mould.
The utility model provides a technical scheme that its technical problem adopted is:
be applied to die cavity heating cooling structure on biaxial stretching cavity blow molding mould, including the preceding mould and the back mould that surround into the die cavity, be located the die cavity bottom, be used for installing the die block board of die cavity and stretch into the tensile pole of die cavity from the die cavity top, be equipped with bearing mechanism in the die cavity, bearing mechanism includes that bearing rod and drive bearing rod stretch into the actuating mechanism at die cavity middle part, its characterized in that: and a heating element and a cooling module which performs cooling operation after the heating element operates are arranged in the front mold and/or the rear mold.
In the present invention, the heating element is a heating tube.
The utility model discloses in, all be equipped with a plurality of heating holes on front mould and/or the back mould, heating element installs in the heating hole.
The utility model discloses in, be equipped with vertically and horizontally staggered's cooling channel in front mould and the back mould, the cooling module by cooling channel constitutes.
The utility model discloses in, be equipped with the through-hole on the die block, the die cavity is worn to the bearing rod from the through-hole in, actuating mechanism installs the outside at the die block.
In the present invention, the driving mechanism is a pneumatic cylinder, a hydraulic cylinder or a motor.
The utility model discloses in, actuating mechanism is connected with the die block through many connecting rods.
The utility model has the advantages that: the utility model discloses be equipped with heating element in front mould and/or the back mould, carry out the cooling module of cooling work after heating element work, when the bottle blowing, utilize heating element to be front mould and back mould heating, the temperature of letting front mould and back mould is close to bottle embryo temperature, avoid the too early cooling of bottle embryo, it is more reasonable to let bottle embryo redraw in-process plastic distribution, the heating tube is closed when finalizing the design to the bottle, reduce front mould and back mould temperature through cooling module and make the bottle cooling design, let the bottle obtain better cooling design effect.
Drawings
The invention will be further explained with reference to the drawings and the embodiments below:
FIG. 1 is a perspective view of the present embodiment;
fig. 2 is a schematic view of the internal structure of the front mold.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention.
Referring to fig. 1-2, a mold cavity 1 heating and cooling structure applied to a two-way stretching hollow blow molding mold includes a front mold 2 and a rear mold enclosing to form the mold cavity 1, a bottom mold 3 located at the bottom of the mold cavity 1, a bottom mold plate 4 for mounting the bottom mold 3, and a stretching rod 5 extending into the mold cavity 1 from the top of the mold cavity 1. And a bearing mechanism is arranged in the die cavity 1 and comprises a bearing rod 6 and a driving mechanism 7 for driving the bearing rod 6 to extend into the middle part of the die cavity 1. The front mold 2 and the rear mold are internally provided with heating elements and cooling modules which perform cooling work after the heating elements work, the heating elements are heating tubes 10, the front mold 2 and the rear mold are respectively provided with a plurality of heating holes 30, and the heating elements are arranged in the heating holes 30. In addition, in the present embodiment, there are four heating holes 30, and one heating element is inserted and mounted in each heating hole 30.
As a preferred embodiment, criss-cross cooling channels 20 are arranged in the front mold 2 and the rear mold, the cooling module is composed of the cooling channels 20, two ends of the cooling channels 20 are respectively a channel inlet 201 and a channel outlet 202, and the channel inlet 201 and the channel outlet 202 can be connected with quick connectors, so that cooling media such as water, gas or oil can enter and exit the cooling channels 20, heat can be taken away, cooling of the front mold 2 and the rear mold can be realized, and bottle shaping can be assisted.
When the structure is used, the four high-power heating tubes 10 are used for heating the front mold 2 and the rear mold, premature cooling of the bottle blank is avoided, plastic distribution in the bottle blank redrawing process is more reasonable, the heating tubes 10 are closed when the bottle is shaped, and the bottle is cooled and shaped through cooling water.
As a preferred embodiment, a plurality of raised ribs 31 are uniformly distributed on the bottom mold 3, the plurality of ribs 31 converge in the middle of the bottom mold 3 to form a raised boss shape, a through hole supporting rod 6 penetrating through the bottom mold 3 is arranged in the middle of the boss and penetrates into the mold cavity 1 from the through hole, the driving mechanism 7 is installed on the outer side of the bottom mold 3, and the supporting rod 6 and the stretching rod 5 are on the same axis.
In this embodiment, actuating mechanism 7 can be pneumatic cylinder, pneumatic cylinder or motor, when only needing the single bearing, preferably the cylinder, the reaction is quick, with low costs, when needs reciprocal bearing many times, preferably servo motor and drive mechanism thereof, can control reciprocal number of times and flexible amplitude through servo motor. In this embodiment, actuating mechanism 7 is connected with die block 3 through many connecting rods 8, and connecting rod 8 passes the vacancy of die block board 4 and is connected with actuating mechanism 7, and many connecting rods 8 enclose into hollow installing support, actuating mechanism 7 installs on installing support, so separates actuating mechanism 7 and die block 3 through installing support, both made things convenient for actuating mechanism 7's installation, also avoids producing influence, increase of service life each other.
The above description is only the preferred embodiment of the present invention, and the technical solutions of the objects of the present invention are all within the protection scope of the present invention as long as the objects are achieved by the substantially same means.
Claims (7)
1. Be applied to die cavity heating cooling structure on biaxial stretching cavity blow molding mould, including the preceding mould and the back mould that surround into the die cavity, be located the die cavity bottom, be used for installing the die block board of die cavity and stretch into the tensile pole of die cavity from the die cavity top, be equipped with bearing mechanism in the die cavity, bearing mechanism includes that bearing rod and drive bearing rod stretch into the actuating mechanism at die cavity middle part, its characterized in that: and a heating element and a cooling module which performs cooling operation after the heating element operates are arranged in the front mold and/or the rear mold.
2. The cavity heating and cooling structure applied to the biaxially oriented hollow blow molding die according to claim 1, wherein: the heating element is a heating tube.
3. The cavity heating and cooling structure applied to the biaxially oriented hollow blow molding die according to claim 1 or 2, wherein: and the front mold and/or the rear mold are/is provided with a plurality of heating holes, and the heating elements are arranged in the heating holes.
4. The cavity heating and cooling structure applied to the biaxially oriented hollow blow molding die according to claim 1, wherein: criss-cross cooling channels are arranged in the front die and the rear die, and the cooling module is composed of the cooling channels.
5. The cavity heating and cooling structure applied to the biaxially oriented hollow blow molding die according to claim 1, wherein: the bottom die is provided with a through hole, the bearing rod penetrates into the die cavity from the through hole, and the driving mechanism is installed on the outer side of the bottom die.
6. The cavity heating and cooling structure applied to the biaxially oriented hollow blow molding die according to claim 1, wherein: the driving mechanism is a pneumatic cylinder, a hydraulic cylinder or a motor.
7. The cavity heating and cooling structure applied to the biaxially oriented hollow blow molding die according to claim 6, wherein: the driving mechanism is connected with the bottom die through a plurality of connecting rods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120775428.9U CN215095551U (en) | 2021-04-14 | 2021-04-14 | Die cavity heating and cooling structure applied to bidirectional stretching hollow blow molding die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120775428.9U CN215095551U (en) | 2021-04-14 | 2021-04-14 | Die cavity heating and cooling structure applied to bidirectional stretching hollow blow molding die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215095551U true CN215095551U (en) | 2021-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120775428.9U Active CN215095551U (en) | 2021-04-14 | 2021-04-14 | Die cavity heating and cooling structure applied to bidirectional stretching hollow blow molding die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215095551U (en) |
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2021
- 2021-04-14 CN CN202120775428.9U patent/CN215095551U/en active Active
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