An injection mold for new energy vehicle parts

Abstract

The present invention relates to the technical field of injection molds, and more specifically, it relates to an injection mold for new energy vehicle parts, comprising an upper mold and a lower mold, a cavity is provided between the upper mold and the lower mold, an injection flow channel is provided in the upper mold, the injection flow channel comprises a main flow channel and two branch flow channels connected to the main flow channel, each branch flow channel is connected to half of the chambers respectively, and the two branch flow channels are both provided with a first solenoid valve; the lower mold is connected to a cooling system, the cooling system comprises two cooling channels, each cooling channel surrounds half of the chambers, and the two cooling channels are both provided with a second solenoid valve; a plurality of chambers connected to the same branch flow channel and surrounded by the same cooling channel are the same group of chambers, and in the same group of chambers, the first solenoid valve of the branch flow channel is connected to the second solenoid valve of the cooling channel by signal, and are opened and closed at the same time. The present invention enables the cooling system in the mold to be synchronously adjusted according to the opening ratio of the chamber, so as to avoid the problem of excessive cooling effect.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to an injection mold for new energy vehicle parts. Background Art

[0002] New energy vehicles refer to vehicles that use new energy to replace traditional fuels, mainly including pure electric vehicles, plug-in hybrid vehicles and fuel cell vehicles. With the improvement of environmental awareness and the aggravation of energy shortage, the development of new energy vehicles has received increasing attention. The development of new energy vehicles has driven the production demand for new energy vehicle parts. It is necessary to increase the investment in the research and development and production of new energy vehicle parts to meet the needs of the new energy vehicle market. Among them, the injection molds of new energy vehicle parts play an important role in the development of the new energy vehicle industry.

[0003] With the continuous development of new energy vehicles, in order to improve the production efficiency of new energy vehicle parts when necessary, it is necessary to use multi-cavity injection molds. The advantages of multi-cavity injection molds include improving production efficiency, reducing production costs, and improving product consistency.

[0004] At present, multi-cavity injection molds used to produce new energy vehicle parts may need to adjust the opening ratio of the cavities due to a decrease in production demand or maintenance of some cavities. However, the cooling system in the mold usually cannot be adjusted synchronously according to the opening ratio of the cavities, which can easily lead to the problem of excessive cooling effect. Summary of the invention

[0005] In order to enable the cooling system in the mold to be synchronously adjusted according to the opening ratio of the cavity and avoid the problem of excessive cooling effect, the present application provides an injection mold for new energy vehicle parts.

[0006] The injection mold of a new energy vehicle part provided by the present invention adopts the following technical solution:

[0007] An injection mold for new energy vehicle parts comprises an upper mold and a lower mold, a cavity is defined between the upper mold and the lower mold, an injection flow channel is defined in the upper mold, the injection flow channel comprises a main flow channel and two branch flow channels connected to the main flow channel, each branch flow channel is connected to half of the chambers respectively, and the two branch flow channels are provided with a first solenoid valve; the lower mold is connected to a cooling system, the cooling system comprises two cooling channels, each cooling channel surrounds half of the chambers, and the two cooling channels are provided with a second solenoid valve; a plurality of chambers connected to the same branch flow channel and surrounded by the same cooling channel are the same group of chambers, and in the same group of chambers, the first solenoid valve of the branch flow channel is connected to the second solenoid valve of the cooling channel by signal, and are opened and closed at the same time.

[0008] Preferably, the diameter of the main flow channel is larger than the diameter of the branch flow channel.

[0009] Preferably, there are six chambers, and the six chambers are distributed in two rows and three columns.

[0010] Preferably, each of the cooling channels has two sections of channels passing through the three chambers in the same row in sequence, the section of channel passing through the chambers in the same row for the first time is the first channel of the cooling channel, and the section of channel passing through the chambers in the same row for the second time is the second channel of the cooling channel, the first channel of the cooling channel is located on the inner side of the chambers in the same row, and the second channel is located on the outer side of the chambers in the same row; the flow directions of cooling water in the two first channels are opposite.

[0011] Preferably, a heat-conducting channel is connected between the first channels of the two cooling channels, a heat-conducting rod is slidably arranged in the heat-conducting channel, and the outer wall of the heat-conducting rod is in contact with the inner wall of the heat-conducting channel.

[0012] Preferably, the heat-conducting channels and the heat-conducting rods are arranged in multiple groups.

[0013] Preferably, the heat conducting rod is a copper rod.

[0014] Preferably, the heat conducting rod is an aluminum rod.

[0015] Preferably, the lower mold includes a first block and a second block, and the lower mold is formed by splicing the first block and the second block together from top to bottom. The upper part of the cooling channel and the heat-conducting channel are processed on the bottom surface of the first block, and the lower part of the cooling channel and the heat-conducting channel are processed on the top surface of the second block.

[0016] Preferably, the first channel between the two cooling channels is in a double helix structure.

[0017] The beneficial effects of the present invention are:

[0018] 1. When both runners are connected so that the opening ratio of the cavity is 100%, the two cooling channels are also opened at the same time. When only one of the two runners is connected so that the opening ratio of the cavity is 50%, only one cooling channel is opened to cool the same group of cavities injected with molten plastic, so that the cooling system in the mold can be adjusted synchronously according to the opening ratio of the cavity, avoiding the problem of excessive cooling effect;

[0019] 2. When the cavity opening ratio of the injection mold is 100%, based on the cooling of the two rows of cavities in different directions by each first channel and the heat exchange effect between the two first channels, the temperature difference between the two first channels is small, the difference in the cooling effect of the first channel on different cavities is reduced, and the product consistency is finally improved;

[0020] 3. By providing a heat conduction channel and a heat conduction rod, compared with air heat exchange, a better heat exchange effect can be achieved between the two first channels, and the temperature difference at various locations in the first channel can be reduced;

[0021] 4. When the water pressure in the two first channels tends to be balanced, the heat conducting rod will stay in the middle of the heat conducting channel. When the water pressure in one of the first channels increases instantaneously, the heat conducting rod can move to the end of the heat conducting channel with lower water pressure to release the increased pressure in one of the first channels, thereby protecting the lower mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a front view of the injection mold in the embodiment of the present application;

[0023] Figure 2 is a top view of the injection mold in the embodiment of the present application;

[0024] Figure 3 is a structural cross-sectional view of the upper mold in an embodiment of the present application;

[0025] Figure 4 is a structural perspective view of the lower mold in an embodiment of the present application;

[0026] Figure 5 It is a schematic diagram of the structure of the heat conduction channel and the heat conduction rod in the embodiment of the present application.

[0027] Explanation of the reference numerals: 1. upper mold; 2. lower mold; 21. first block; 22. second block; 3. lower cavity; 41. main channel; 42. branch channel; 51. first solenoid valve; 52. second solenoid valve; 6. cooling channel; 61. first channel; 62. second channel; 7. heat conduction channel; 71. heat conduction rod; 8. pump body. DETAILED DESCRIPTION

[0028] The following will be combined with the attached Figure 1 -Attached Figure 5 The present invention is further illustrated by the following embodiments.

[0029] Embodiment 1

[0030] This embodiment discloses an injection mold for new energy vehicle parts.

[0031] Reference Figures 1 to 4The injection mold of new energy vehicle parts includes an upper mold 1 and a lower mold 2, wherein the upper mold 1 is a movable mold and the lower mold 2 is a fixed mold. A cavity is provided between the upper mold 1 and the lower mold 2, and the cavity includes an upper cavity and a lower cavity 3. The upper cavity is provided at the bottom of the upper mold 1, and the lower cavity 3 is provided at the top of the lower mold 2. When the upper mold 1 and the lower mold 2 are molded together, a complete cavity is formed between the upper cavity and the lower cavity 3. Furthermore, a plurality of cavities are provided. In the present embodiment, the number of cavities provided is six, and the six cavities are distributed in two rows and three columns.

[0032] Reference Figure 3 and Figure 4 , the upper mold 1 is provided with an injection runner, and the injection runner includes a main runner 41 and two branch runners 42, the diameter of the main runner 41 is larger than the diameter of the branch runner 42, wherein the main runner 41 is vertically opened at the top of the upper mold 1, the upper end of the main runner 41 serves as the runner inlet, and the two branch runners 42 are connected to the lower end of the main runner 41. Furthermore, a plurality of runner outlets are provided at the lower end of each branch runner 42, and the plurality of runner outlets are connected to a plurality of upper cavities one by one, and each branch runner 42 is connected to half of the upper cavities respectively. In the present embodiment, each branch runner 42 is connected to three upper cavities in the same row. In summary, the injection molding process of the injection mold of the present invention is as follows: after the upper mold 1 and the lower mold 2 are closed, the molten plastic first enters the main runner 41 through the runner inlet, and then enters the two branch runners 42 respectively from the main runner 41, and finally enters the plurality of cavities respectively from the plurality of runner outlets. It should be noted that when using the injection mold of the present invention, attention should be paid to the amount of molten plastic injected to avoid injecting too much molten plastic, which may cause waste connecting rods to be generated in the diversion channel at the upper mold between the injection molded parts, thereby avoiding affecting the ejection of subsequent injection molded parts.

[0033] Reference Figure 3 A first solenoid valve 51 is provided at the upper end of the two branch channels 42. When the two first solenoid valves 51 are both opened, the cavity utilization rate in the injection mold is 100%. When one of the first solenoid valves 51 is closed, the cavity utilization rate in the injection mold is 50%. Therefore, the setting of the two first solenoid valves 51 is used to adjust the opening ratio of the cavity in the injection mold.

[0034] Reference Figure 4 The lower mold 2 is connected to a cooling system, which includes two cooling channels 6. A pump body 8 is provided in each cooling channel 6. The pump body 8 is externally connected to cooling water. Each cooling channel 6 surrounds half of the lower mold cavities 3. In the present embodiment, each cooling channel 6 surrounds three lower mold cavities 3 in the same row. When cooling water circulates in the cooling channel 6, the three chambers in the same row can be cooled, thereby providing a cooling effect for the injection molded parts.

[0035] Reference Figure 4, a second solenoid valve 52 is provided in each of the two cooling channels 6. When the two second solenoid valves 52 are both opened, the utilization rate of the cooling channel 6 in the injection mold is 100%. When one of the second solenoid valves 52 is closed, the utilization rate of the cooling channel 6 in the injection mold is 50%. Therefore, the setting of the two second solenoid valves 52 is used to adjust the opening ratio of the cooling channel 6 in the injection mold.

[0036] Reference Figure 3 and Figure 4 , multiple chambers connected to the same branch channel 42 and surrounded by the same cooling channel 6 are the same group of chambers, that is, the chambers in the same row are the same group of chambers. In the same group of chambers, the first solenoid valve 51 of the branch channel 42 is connected to the second solenoid valve 52 of the cooling channel 6 by signal, and are opened and closed at the same time. Through this setting, when the two branch channels 42 are connected so that the opening ratio of the chamber is 100%, the two cooling channels 6 are also opened at the same time. When only one of the two branch channels 42 is connected so that the opening ratio of the chamber is 50%, only one cooling channel 6 is opened and cools the same group of chambers injected with molten plastic, so that the cooling system in the mold can be synchronously adjusted according to the opening ratio of the chamber, avoiding the problem of excessive cooling effect.

[0037] Reference Figure 4 Since the cooling channel 6 is arranged around the chambers in the same row, each cooling channel 6 has two sections of channels that pass through the three chambers in the same row in sequence, and the section of the channel that passes through the chambers in the same row for the first time is the first channel 61 of the cooling channel 6, and the section of the channel that passes through the chambers in the same row for the second time is the second channel 62 of the cooling channel 6. Among them, since the first channel 61 of the cooling channel 6 will first absorb most of the heat, and then enter the second channel 62 after heating, the first channel 61 of the cooling channel 6 plays a major cooling effect, that is, the cooling effect of the injection molded parts in the three chambers in the same row is mainly determined by the first channel 61 of the cooling channel 6. However, since the first channel 61 of the cooling channel 6 passes through the three chambers in the same row in sequence, the cooling effect of the injection molded parts in the chamber that is first passed by the first channel 61 is better, and the cooling effect of the injection molded parts in the chamber that is later passed by the first channel 61 is worse, which ultimately leads to inconsistent cooling effects of the injection molded parts in the three cavities in the same row, thereby affecting the product consistency in the multi-cavity injection mold. For this reason, the present invention also makes the following improvements.

[0038] Reference Figure 4, the first channel 61 of the cooling channel 6 is located on the inner side of the chambers in the same row, and the second channel 62 is located on the outer side of the chambers in the same row, so that the first channels 61 of the two cooling channels 6 are both located between the two rows of chambers, so that the two first channels 61 can cool the two rows of chambers at the same time. In addition, the flow directions of the cooling water in the two first channels 61 are opposite. Through the above arrangement, when the chamber opening ratio of the injection mold is 100%, based on the cooling of the two rows of chambers in different directions by each first channel 61 and the heat exchange effect between the two first channels 61, the temperature difference at each location in the two first channels 61 is small, the difference in cooling effect of the first channel 61 on different chambers is reduced, and the product consistency is finally improved.

[0039] Reference Figure 4 and Figure 5 , a heat-conducting channel 7 is connected between the first channels 61 of the two cooling channels 6, a heat-conducting rod 71 is slidably arranged in the heat-conducting channel 7, and the outer wall of the heat-conducting rod 71 is in contact with the inner wall of the heat-conducting channel 7. By arranging the heat-conducting channel 7 and the heat-conducting rod 71, compared with air heat exchange, a better heat exchange effect can be achieved between the two first channels 61, and the temperature difference at various places in the first channel 61 can be reduced. In addition, the heat-conducting channel 7 and the heat-conducting rod 71 can be arranged in multiple groups to further reduce the temperature difference at various places in the first channel 61. In this embodiment, the heat-conducting rod 71 is made of a copper rod, which has good thermal conductivity and is suitable as the material of the heat-conducting rod 71. In other embodiments, the heat-conducting rod 71 can also be made of an aluminum rod. Furthermore, the diameters of the two ends of the heat-conducting channel 7 are smaller and the diameter of the middle section is larger. The heat-conducting rod 71 is arranged in the middle section of the heat-conducting channel 7, and the length of the middle section is greater than the length of the heat-conducting rod 71. The purpose of the above arrangement is that when the water pressure in the two first channels 61 tends to be balanced, the heat conducting rod 71 will stay in the middle of the heat conducting channel 7, and when the water pressure in one of the first channels 61 increases instantaneously, the heat conducting rod 71 can move to the end of the heat conducting channel 7 where the water pressure is smaller, so as to release the increased pressure in one of the first channels 61, thereby protecting the lower mold 2. It should be noted that a small amount of cooling water is allowed to penetrate between the outer wall of the heat conducting rod 71 and the inner wall of the heat conducting channel 7, and the small amount of cooling water penetration does not affect the cooling effect of the two cooling channels 6.

[0040] Reference Figure 1 , Figure 4 and Figure 5In order to facilitate the processing of the cooling channel 6 and the heat-conducting channel 7, and to facilitate the installation of the heat-conducting rod 71 into the heat-conducting channel 7, the lower mold 2 adopts a split structure, that is, the lower mold 2 includes a first block 21 and a second block 22 and is spliced ​​together from top to bottom by the first block 21 and the second block 22. The upper part of the cooling channel 6 and the heat-conducting channel 7 is processed on the bottom surface of the first block 21, and the lower part of the cooling channel 6 and the heat-conducting channel 7 is processed on the top surface of the second block 22. Finally, after splicing, a complete cooling channel 6 and heat-conducting channel 7 are formed.

[0041] Embodiment 2

[0042] This embodiment also discloses an injection mold for new energy vehicle parts.

[0043] The difference from Example 1 is that the first channels 61 between the two cooling channels 6 are in a double helix structure. On the one hand, the double helix structure improves the heat exchange effect between the two first channels 61 and further reduces the temperature difference at various locations of the first channels 61. On the other hand, the double helix structure extends the path of the first channel 61, thereby giving full play to the main cooling effect of the first channel 61 on the chamber.

[0044] The above are all preferred embodiments of the present invention, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An injection mold for new energy vehicle parts, characterized in that: The invention comprises an upper mold (1) and a lower mold (2), wherein a cavity is provided between the upper mold (1) and the lower mold (2), and the upper mold (1) is provided with an injection molding flow channel, wherein the injection molding flow channel comprises a main flow channel (41) and two branch flow channels (42) connected to the main flow channel (41), wherein each branch flow channel (42) is connected to half of the cavities, and each of the two branch flow channels (42) is provided with a first electromagnetic valve (51); the lower mold (2) is connected to a cooling system, wherein the cooling system comprises two cooling channels (6), wherein each cooling channel (6) surrounds half of the cavities, and each of the two cooling channels (6) is provided with a second electromagnetic valve (52); a plurality of cavities connected to the same branch flow channel (42) and surrounded by the same cooling channel (6) are the same group of cavities, and within the same group of cavities, the first electromagnetic valve (51) of the branch flow channel (42) is connected to the second electromagnetic valve (52) of the cooling channel (6) by signal, and are opened and closed at the same time; There are six chambers, and the six chambers are distributed in two rows and three columns; Each of the cooling channels (6) has two sections of channels that sequentially pass through the three chambers in the same row, the section of channel that passes through the chambers in the same row for the first time being the first channel (61) of the cooling channel (6), and the section of channel that passes through the chambers in the same row for the second time being the second channel (62) of the cooling channel (6); the first channel (61) of the cooling channel (6) is located on the inner side of the chambers in the same row, and the second channel (62) is located on the outer side of the chambers in the same row; the cooling water in the two first channels (61) flows in opposite directions; A heat conduction channel (7) is connected between the first channels (61) of the two cooling channels (6), a heat conduction rod (71) is slidably arranged in the heat conduction channel (7), and the outer wall of the heat conduction rod (71) is in contact with the inner wall of the heat conduction channel (7); The diameters of the two ends of the heat-conducting channel (7) are smaller, while the diameter of the middle section is larger; the heat-conducting rod (71) is arranged in the middle section of the heat-conducting channel (7), and the length of the middle section is greater than the length of the heat-conducting rod (71).

2. The injection mold for new energy vehicle parts according to claim 1, characterized in that: The diameter of the main flow channel (41) is greater than the diameter of the branch flow channel (42).

3. The injection mold for new energy vehicle parts according to claim 1, characterized in that: The heat-conducting channels (7) and the heat-conducting rods (71) are arranged in multiple groups.

4. The injection mold for new energy vehicle parts according to claim 3, characterized in that: The heat conducting rod (71) is a copper rod.

5. The injection mold for new energy vehicle parts according to claim 3, characterized in that: The heat conducting rod (71) is an aluminum rod.

6. The injection mold for new energy vehicle parts according to claim 3, characterized in that: The lower mold (2) comprises a first block (21) and a second block (22), and the lower mold (2) is formed by splicing the first block (21) and the second block (22) together from top to bottom; the upper parts of the cooling channel (6) and the heat-conducting channel (7) are processed on the bottom surface of the first block (21), and the lower parts of the cooling channel (6) and the heat-conducting channel (7) are processed on the top surface of the second block (22).

7. The injection mold for new energy vehicle parts according to claim 3, characterized in that: The first channel (61) between the two cooling channels (6) is in a double helix structure.

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