CN213082187U

CN213082187U - Injection mold with thermal compensation function

Info

Publication number: CN213082187U
Application number: CN202021841706.8U
Authority: CN
Inventors: 张国胜
Original assignee: Wuhan Kunlun Plastics Co ltd
Current assignee: Wuhan Kunlun Plastics Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-04-30
Anticipated expiration: 2030-08-28

Abstract

The utility model provides an injection mold with thermal compensation function, which comprises an upper mold and a lower mold, wherein the upper mold is matched with the lower mold, a mold cavity is arranged on the assembly surface of the lower mold, a plurality of multifunctional holes are vertically arranged along the bottom surface of the lower mold to the assembly surface, and the bottoms of the multifunctional holes are provided with threaded connectors; also comprises a heating rod and a heat preservation rod; the heating rod is matched with the multifunctional hole, and a threaded column matched with the threaded connecting port is arranged at the top of the heating rod; the heat preservation stick with multi-functional hole looks adaptation, pack asbestos fibre in the heat preservation stick the utility model discloses an injection mold with thermal compensation function through setting up multi-functional hole, realizes thermal compensation, normal heat dissipation, three kinds of functions that keep warm to different measures are implemented to the different positions of complicated mould, thereby improve injection mold's yield.

Description

Injection mold with thermal compensation function

Technical Field

The utility model belongs to the technical field of the injection mold technique and specifically relates to an injection mold with thermal compensation function.

Background

Injection molding is a method for producing and molding industrial products. Also known as injection moulding, the desired product is finally obtained by cooling the injected fluid in the mould. In the prior art, the shape of the mold cavity of the mold is generally simple, if the shape is complex, especially when the injection far end has a plurality of fine strip structures, the injected fluid is solidified after passing through the normal temperature mold, possibly because the temperature is reduced too fast, the far end complex structures such as the fine strips cannot obtain the required shape, the phenomenon of non-uniform filling in the mold cavity is caused, and the molding of injection molding parts is influenced. In order to solve the above technical problems, a person skilled in the art generally adopts a technical method of increasing the temperature of the fluid during injection, but increasing the temperature of the fluid results in an increase in cooling time and a decrease in the overall injection molding efficiency. Meanwhile, the injection molding machine needs to be modified, and the cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an injection mold with thermal compensation function solves the technical problem that the yield is low when making complicated structure of current injection mold.

In order to achieve the above object, the utility model provides a following technical scheme:

an injection mold with a thermal compensation function comprises an upper mold and a lower mold, wherein the upper mold is matched with the lower mold, a mold cavity is formed in an assembly surface of the lower mold, a plurality of multifunctional holes are vertically formed in the assembly surface along the bottom surface of the lower mold, and threaded connectors are arranged at the hole bottoms of the multifunctional holes;

also comprises a heating rod and a heat preservation rod; the heating rod is matched with the multifunctional hole, and a threaded column matched with the threaded connecting port is arranged at the top of the heating rod; the heat-insulating rod is matched with the multifunctional hole, and asbestos fibers are filled in the heat-insulating rod.

The shell of the heating rod is made of steel, a heating pipe is installed in the shell, and an electronic thermometer is arranged at the bottom of the heating rod.

The outer wall of the heating rod is provided with a heating strip, and the hole wall of the multifunctional hole is provided with a groove matched with the heating strip.

Wherein, the outer wall of the heat preservation rod is provided with an installation strip matched with the groove.

And the lower mold is provided with an injection port, and the injection port is communicated with the mold cavity.

The upper die is provided with a positioning plug, the lower die is provided with a positioning socket, and the positioning plug is matched with the positioning socket.

The assembly surface of the upper die is provided with a plurality of first deep slots, the direction of each first deep slot is parallel to the outer side wall of the upper die, the top of the upper die is provided with a temperature-adjusting air passage, and the bottom of each first deep slot is communicated with the temperature-adjusting air passage; the assembling surface of the lower die is provided with a plurality of second deep grooves corresponding to the first deep grooves respectively, the side wall of the lower die is provided with a loop air passage, and the bottom of each second deep groove is communicated with the loop air passage respectively.

The temperature adjusting air passage is communicated with the output end of the fan through the heating pipe, the loop air passage is communicated with the input end of the fan, and the outside of the heating pipe is provided with the heat radiating fins.

The inner wall of the heating pipe is provided with a vacuum port communicated with the outside, and the vacuum port is communicated with a vacuum pump.

The utility model discloses an injection mold with thermal compensation function through setting up multi-functional hole, realizes thermal compensation, normal heat dissipation, three kinds of functions that keep warm to different measures are implemented to the different positions of complicated mould, thereby improve injection mold's yield.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of an upper mold of the present invention;

FIG. 3 is a schematic structural view of an upper mold of the present invention;

FIG. 4 is a schematic view of the lower mold structure of the present invention;

FIG. 5 is a schematic view of the lower mold structure of the present invention;

fig. 6 is a schematic structural view of the heating rod of the present invention;

FIG. 7 is a schematic view of the structure of the heat-insulating rod of the present invention;

FIG. 8 is a schematic structural view of the lower mold of the present invention when a heating rod and a heat-insulating rod are installed;

FIG. 9 is a schematic cross-sectional view of FIG. 8;

fig. 10 is a schematic structural view of another embodiment of the lower mold of the present invention;

FIG. 11 is a schematic structural view of another embodiment of the heating rod of the present invention;

FIG. 12 is a schematic structural view of another embodiment of the insulating rod of the present invention;

fig. 13 is a schematic view of the connection mode of the deep slot, the fan and the vacuum pump of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

According to fig. 1-12, the utility model discloses an injection mold with thermal compensation function, including upper mold 1 and bed die 2, upper mold 1 with bed die 2 looks adaptation is assembled on bed die 2 through upper mold 1 to accomplish the equipment of mould. And a mold cavity 3 is formed in the assembly surface of the lower mold 2, fluid is injected into the mold cavity 3 and uniformly exists in the mold cavity 3, and a finished product with the same shape as the mold cavity 3 can be formed after the fluid is cooled. The specific shape of the mould cavity 3 corresponds to the product to be made and therefore no limitation is required on the specific shape of the mould cavity 3. A plurality of multifunctional holes 4 are vertically formed from the bottom surface of the lower die 2 to the assembly surface, and threaded connectors 5 are arranged at the bottoms of the multifunctional holes 4; the multifunctional hole heating device also comprises a heating rod 6 for heating the position at the multifunctional hole and a heat preservation rod 7 for reducing the heat dissipation speed of the position at the multifunctional hole; the heating rod 6 is matched with the multifunctional hole 4, and a threaded column 8 matched with the threaded connecting port 5 is arranged at the top of the heating rod 6; the heat-insulating rod 7 is matched with the multifunctional hole 4, asbestos fibers are filled in the heat-insulating rod 7 and used for heat insulation, and the shell of the heat-insulating rod 7 can be made of any heat-resistant material, such as asbestos and steel, and does not need to be limited.

As shown in fig. 8-9, when in use, the heating rod 6 and the heat-preserving rod 7 are provided with a plurality of parts, according to the shape of the die cavity 3, the part which needs to be heated to avoid the fluid from flowing due to too fast cooling and the part which only needs to be heat-preserved to reduce the heat dissipation speed are determined, and the heating rod 6 and the heat-preserving rod 7 are inserted into the needed multifunctional hole 4. If the heating rod 6 or the heat preservation rod 7 is not inserted, the multifunctional hole 4 at the position is used for normally dissipating heat.

For example, the highest temperature at the injection port ensures free flow of fluid without the need for heating. For example, the far end of the mold cavity, i.e., the end far away from the sprue, may have insufficient temperature due to too fast temperature reduction of the fluid, so that the fluidity of the fluid is poor. An injection port 201 is formed in the lower mold 2, and the injection port 201 is communicated with the mold cavity 3.

The shell material of heating rod 6 is the steel, installs the heating pipe in the shell, and the heating pipe is through the circular telegram intensification, and the shell temperature of heating rod 6 risees thereupon to heating rod 6 heats multi-functional hole 4, and then the mould chamber temperature of this position of multi-functional hole that is heated risees thereupon, guarantees that the fluid that this position department of mould chamber 3 flows can not lead to solidifying because of the temperature descends too fast. The bottom of heating rod 6 is equipped with electronic thermometer 601, and electronic thermometer 601 is used for the temperature of measurement heating rod 6, and the workman of being convenient for in time knows the temperature of heating rod 6.

In an alternative embodiment, as shown in fig. 10-12. The outer wall of the heating rod 6 is provided with a heating strip 61, and the hole wall of the multifunctional hole 4 is provided with a groove 41 matched with the heating strip 61. The design of the heating strip 61 increases the surface area of the shell of the heating rod 6, the heating of the multifunctional hole part is quicker and more efficient, and the combination of the heating rod 6 and the multifunctional hole 4 is more compact by increasing the surface area. The outer wall of the insulating rod 7 is provided with a mounting strip 71 which is matched with the groove 41 so as to be matched with the multifunctional hole 4, and the same principle is also used for increasing the surface area so as to increase the contact area with the multifunctional hole 4.

As shown in fig. 1, 3 and 4, the upper mold 1 is provided with a positioning plug 10, the lower mold 2 is provided with a positioning socket 20, the positioning plug 10 is adapted to the positioning socket 20, and when the upper mold 1 is placed on the lower mold 2, the positioning plug 10 is inserted into the positioning socket 20, so that the upper mold 1 is ensured to be in a set position when being mounted on the lower mold 2 every time, and the assembly precision of the upper mold 1 and the lower mold 2 is improved.

According to fig. 13, a plurality of first deep slots 901 are formed in the assembly surface of the upper mold 1, the direction of each first deep slot 901 is parallel to the outer side wall of the upper mold 1, a temperature adjusting air passage 903 is formed in the top of the upper mold 1, and the bottom of each first deep slot 901 is communicated with the temperature adjusting air passage 903; the assembling surface of the lower die 2 is provided with a plurality of second deep grooves 902 corresponding to the first deep grooves 901, the side wall of the lower die 2 is provided with a loop air passage 904, and the bottom of each second deep groove 902 is communicated with the loop air passage 904. The first deep slot 901 and the second deep slot 902 in this arrangement reduce the heat transfer efficiency, and therefore have a good heat preservation effect.

The temperature adjusting air passage 903 is communicated with an output end of a fan 906 through a heating pipe 905, the loop air passage 904 is communicated with an input end of the fan 906, and a heat radiating fin 907 is arranged outside the heating pipe 905. In the arrangement, after the fan 906 is started, airflow movement is formed in the first deep slot 901 and the second deep slot 902, when the heating pipe 905 works, the heating purpose of the first deep slot 901 and the second deep slot 902 is achieved, and when the heating pipe 905 is closed, the temperature of the airflow in the heating pipe 905 is reduced by the heat dissipation fins 907.

The inner wall of the heating pipe 905 is provided with a vacuum port 908 which is communicated with the outside, and the vacuum port 908 is communicated with a vacuum pump 909. After the vacuum pump 909 is started, the first deep groove 901 and the second deep groove 902 are vacuumized, so that the heat insulation performance of the mold is improved.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an injection mold with thermal compensation function, includes mould and bed die, go up the mould with bed die looks adaptation, set up the mould chamber on the fitting surface of bed die, its characterized in that: a plurality of multifunctional holes are vertically formed from the bottom surface of the lower die to the assembly surface, and threaded connectors are arranged at the bottoms of the multifunctional holes;

2. An injection mold with a thermal compensation function according to claim 1, characterized in that: and the lower mold is provided with an injection port which is communicated with the mold cavity.

3. An injection mold having a thermal compensation function according to claim 2, characterized in that: the shell material of heating rod is the steel, installs the heating pipe in the shell, and the bottom of heating rod is equipped with the electron thermometer.

4. An injection mold having a thermal compensation function according to claim 3, characterized in that: the outer wall of the heating rod is provided with a heating strip, and the hole wall of the multifunctional hole is provided with a groove matched with the heating strip.

5. An injection mold with a thermal compensation function according to claim 4, characterized in that: and the outer wall of the heat-insulating rod is provided with a mounting bar matched with the groove.

6. An injection mold with a thermal compensation function according to claim 5, characterized in that: the upper die is provided with a positioning plug, the lower die is provided with a positioning socket, and the positioning plug is matched with the positioning socket.

7. An injection mold with a thermal compensation function according to claim 6, characterized in that: the assembly surface of the upper die is provided with a plurality of first deep slots, the direction of each first deep slot is parallel to the outer side wall of the upper die, the top of the upper die is provided with a temperature-adjusting air passage, and the bottom of each first deep slot is communicated with the temperature-adjusting air passage; the assembling surface of the lower die is provided with a plurality of second deep grooves corresponding to the first deep grooves respectively, the side wall of the lower die is provided with a loop air passage, and the bottom of each second deep groove is communicated with the loop air passage respectively.

8. An injection mold having a thermal compensation function according to claim 7, characterized in that: the temperature adjusting air passage is communicated with the output end of the fan through the heating pipe, the loop air passage is communicated with the input end of the fan, and the outside of the heating pipe is provided with the heat radiating fins.

9. An injection mold having a thermal compensation function according to claim 8, characterized in that: the inner wall of the heating pipe is provided with a vacuum port communicated with the outside, and the vacuum port is communicated with a vacuum pump.