Electric vehicle rear trunk injection mold based on gas top demolding technology

Abstract

The utility model belongs to injection mould technical field discloses a kind of electric vehicle rear-mounted box injection mould based on gas top demoulding technology, including upper die, lower die and mould core, mould core is equipped with gas top system, gas top system includes airway network, gas hole array and pressure regulating valve;The both sides of upper die are embedded with cooling pipe, cooling pipe is serpentine, the both ends of cooling pipe are connected with external water supply system and external recovery wastewater system respectively, gas hole array includes main gas hole and vice gas hole, and main gas hole and vice gas hole are evenly distributed in product demoulding difficult area, airway network includes main airway connected with main gas hole and vertical branch airway connected with vice gas hole, the inside of main gas hole is equipped with horizontal branch airway, and horizontal branch airway is connected with main gas hole, main gas hole is equipped with air inlet pipe, air inlet pipe penetrates lower die, and part of extension is connected with pressure regulating valve.The utility model not only has simple structure, good demoulding effect, and product appearance quality is high.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, and in particular to an injection mold for the rear storage box of an electric vehicle based on air ejection technology. Background Technology

[0002] The injection mold for the rear storage box of electric vehicles based on air ejection technology is a mold designed specifically for the production of rear storage boxes for electric vehicles. Its core lies in using air pressure to assist in the demolding process. The principle is to set up an air circuit system inside the mold and use the uniform pressure generated by compressed air to smoothly eject the molded plastic part from the mold cavity.

[0003] With the rapid development of the electric vehicle industry, the rear storage box, as an important functional component of electric vehicles, directly affects the overall vehicle performance in terms of production quality and efficiency. Traditional injection molds for electric vehicle rear storage boxes generally use mechanical ejection mechanisms, which have the following technical defects:

[0004] 1) Obvious ejection marks affect the product's appearance quality;

[0005] 2) Complex structures are difficult to demold and are prone to product deformation. Therefore, we propose an injection mold for the rear storage box of electric vehicles based on air-jacking demolding technology. Utility Model Content

[0006] In view of the aforementioned problems with the mechanical ejection mechanism commonly used in existing injection molds for electric vehicle rear storage boxes, this utility model is proposed.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0008] An injection mold for a rear storage box of an electric vehicle based on air-jacking demolding technology includes an upper mold, a lower mold, and a mold core. The mold core is equipped with an air-jacking system, which includes an air channel network disposed on the mold core, an air hole array communicating with the air channel network, and a pressure regulating valve communicating with an external air source.

[0009] Cooling pipes are embedded in both sides of the upper mold. The cooling pipes are snake-shaped and their two ends are connected to an external water supply system and an external wastewater recycling system, respectively.

[0010] As a technical solution for the injection mold of the electric vehicle rear storage box based on air-top demolding technology described in this utility model, the air hole array includes main air holes and secondary air holes, and the main air holes and the secondary air holes are evenly distributed in the area where product demolding is difficult.

[0011] As a technical solution of the electric vehicle rear storage box injection mold based on air top demolding technology described in this utility model, the diameter of the main air hole is 0.6mm-0.8mm, the diameter of the secondary air hole is 0.3mm-0.5mm, and the spacing between the air holes is 15-25mm.

[0012] As a technical solution for the injection mold of the electric vehicle rear storage box based on air-jacking demolding technology described in this utility model, the air channel network includes a main air channel connected to the main air hole and a vertical branch air channel connected to the auxiliary air hole. The main air channel is connected to the vertical branch air channel. A horizontal branch air channel is installed inside the main air hole and is connected to the main air hole. An air inlet pipe is installed on the main air hole. The air inlet pipe passes through the lower mold and its extended portion is connected to the pressure regulating valve.

[0013] As a technical solution for the injection mold of the electric vehicle rear storage box based on air top demolding technology described in this utility model, the diameter of the main air channel is 8-12mm, and the diameters of the vertical branch air channel and the horizontal branch air channel are both 4-6mm.

[0014] As a technical solution of the electric vehicle rear storage box injection mold based on air top demolding technology described in this utility model, the outer surface of the mold core is provided with a nano-coating, the thickness of the nano-coating is 5-10μm, and the surface roughness Ra≤0.1μm.

[0015] As a technical solution for the injection mold of the electric vehicle rear storage box based on the air-top demolding technology described in this utility model, one end of the cooling pipe is a water inlet, and the water inlet is connected to an external water supply system; the other end of the cooling pipe is a water outlet, and the water outlet is connected to an external wastewater recycling system.

[0016] As a technical solution of the electric vehicle rear storage box injection mold based on air top demolding technology described in this utility model, the upper mold is provided with a vacuum adsorption channel, and the vacuum degree is -0.06 to -0.09 MPa.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] 1. This utility model, through precise air pressure control of the air ejection system, can uniformly release gas pressure during demolding, reduce contact friction between the product and the mold core, and avoid deformation or scratches caused by traditional mechanical ejection. At the same time, combined with the nano-coating on the surface of the mold core, it can further reduce demolding resistance and improve the surface smoothness of the product.

[0019] 2. In this utility model, the serpentine cooling pipe design combined with the vacuum adsorption channel enables rapid and uniform cooling of the mold. At the same time, the cooling water circulation system and the vacuum adsorption channel work together to prevent uneven shrinkage of the product and shorten the injection molding cycle.

[0020] 3. The present invention features a graded air channel network and a differentiated design of air hole diameters, which can ensure uniform gas distribution and avoid the risk of air channel blockage. At the same time, the wear-resistant properties of the nano-coating can extend the service life of the mold core and reduce the need for frequent polishing and maintenance. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0022] Figure 1 This is a schematic diagram of the overall main structure of this utility model.

[0023] Figure 2 This is a schematic side view of the overall structure of this utility model.

[0024] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0025] Figure 4 This is a schematic diagram of the main structure of the mold core of this utility model.

[0026] Figure 5 This is a bottom view of the mold core structure of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] In the diagram: 1. Upper mold; 101. Vacuum adsorption channel; 2. Lower mold; 3. Mold core; 301. Nano coating; 401. Main air hole; 402. Secondary air hole; 403. Main air passage; 404. Vertical branch air passage; 405. Horizontal branch air passage; 406. Air inlet pipe; 407. Pressure regulating valve; 5. Cooling pipe; 501. Water inlet; 502. Water outlet. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] Reference Figures 1-5This invention provides an injection mold for the rear storage box of an electric vehicle based on air ejector technology. The injection mold for the rear storage box of an electric vehicle based on air ejector technology includes an upper mold 1, a lower mold 2 and a mold core 3. The mold core 3 is equipped with an air ejector system, which includes an air channel network on the mold core 3, an air hole array connected to the air channel network, and a pressure regulating valve 407 connected to an external air source. In application, this helps to avoid deformation or breakage caused by local adhesion.

[0031] Cooling pipes 5 are embedded on both sides of the upper mold 1. The cooling pipes 5 are snake-shaped. The two ends of the cooling pipes 5 are connected to the external water supply system and the external wastewater recycling system, respectively. In application, by increasing the surface area contact, heat can be dissipated more quickly, preventing warping or shrinkage caused by uneven cooling.

[0032] Reference Figure 4 and Figure 5 The pore array includes a main pore 401 and a secondary pore 402, and the main pore 401 and the secondary pore 402 are evenly distributed in the area where the product is difficult to demold, so as to facilitate demolding.

[0033] Reference Figure 4 and Figure 5 The main vent 401 has a vent diameter of 0.6mm-0.8mm, the secondary vent 402 has a vent diameter of 0.3mm-0.5mm, and the vent spacing is 15-25mm. In application, the differential design of the main vent 401 and secondary vent 402, combined with the pressure regulating valve 407, can realize graded air pressure loading and reduce the internal stress of the product.

[0034] Reference Figure 4 and Figure 5 The airway network includes a main airway 403 connected to the main airway 401 and a vertical branch airway 404 connected to the auxiliary airway 402. The main airway 403 is connected to the vertical branch airway 404. A horizontal branch airway 405 is installed inside the main airway 401 and is connected to the main airway 401. An air inlet pipe 406 is installed on the main airway 401. The air inlet pipe 406 passes through the lower mold 2 and extends out to connect to the pressure regulating valve 407 to facilitate local repair or replacement and reduce the overall maintenance difficulty.

[0035] Reference Figure 4 and Figure 5 The diameter of the main airway 403 is 8-12mm, and the diameters of the vertical branch airway 404 and the horizontal branch airway 405 are both 4-6mm. In application, the diameters of the main airway 403 and the branch airways are matched to the gas flow requirements to prevent airway blockage or uneven gas distribution.

[0036] Reference Figure 4 and Figure 5The outer surface of the mold core 3 is provided with a nano-coating 301. The thickness of the nano-coating 301 is 5-10μm and the surface roughness Ra≤0.1μm. In application, the nano-coating 301 on the surface of the mold core 3 can significantly reduce contact friction with the injection molding material, avoid demolding scratches, and enhance anti-adhesion. The wear resistance and corrosion resistance of the coating reduce the maintenance frequency of the mold core and reduce long-term use costs.

[0037] Reference Figure 1 and Figure 3 One end of the cooling pipe 5 is a water inlet 501, which is connected to an external water supply system. The other end of the cooling pipe 5 is a water outlet 502, which is connected to an external wastewater recycling system, so as to ensure stable heat exchange efficiency and reduce the molding cycle of a single part.

[0038] Reference Figures 1-3 The upper mold 1 is provided with a vacuum adsorption channel 101, and the vacuum degree is -0.06 to -0.09 MPa. In application, the vacuum adsorption channel 101 adsorbs the product before demolding to avoid displacement or deformation, which is especially suitable for thin-walled box structures (such as electric vehicle storage boxes).

[0039] The working principle of this utility model is as follows: After the electric vehicle rear storage box is injection molded, and the vacuum adsorption channel 101 is used to vacuum adsorb and fix the electric vehicle rear storage box, cooling water is injected into the inner cavity of the cooling pipe 5 through the water inlet 501 through the external water supply system. At this time, the cooling water cools the injection molded product by the principle of heat exchange, and the heat-exchanged cooling water is discharged to the external wastewater recycling system through the water outlet 502. Then, the external air source is started. At this time, the gas enters the air hole array through the air channel network, and the secondary air hole 402 performs pre-demolding treatment, and the main air hole 401 completes the overall demolding treatment until the injection molded electric vehicle rear storage box is completely demolded, and then it can be taken out. This makes it convenient to demold the electric vehicle rear storage box, and the demolding effect is good. The structure is simple, and at the same time, it can ensure the appearance quality of the electric vehicle rear storage box and the quality is high.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An injection mold for a rear storage box of an electric vehicle based on air-jacking demolding technology, comprising an upper mold (1), a lower mold (2), and a mold core (3), characterized in that: The mold core (3) is provided with an air-cushioning system, which includes an air channel network on the mold core (3), an air hole array connected to the air channel network, and a pressure regulating valve (407) connected to an external air source. Cooling pipes (5) are embedded in both sides of the upper mold (1). The cooling pipes (5) are snake-shaped and their two ends are connected to an external water supply system and an external wastewater recycling system, respectively.

2. The injection mold for the rear storage compartment of an electric vehicle based on air-jacking demolding technology according to claim 1, characterized in that: The pore array includes a main pore (401) and a secondary pore (402), and the main pore (401) and the secondary pore (402) are evenly distributed in the area where the product is difficult to demold.

3. The injection mold for the rear storage compartment of an electric vehicle based on air-jacking demolding technology according to claim 2, characterized in that: The diameter of the main vent (401) is 0.6mm-0.8mm, the diameter of the secondary vent (402) is 0.3mm-0.5mm, and the spacing between the vents is 15-25mm.

4. The injection mold for the rear storage compartment of an electric vehicle based on air-jacking demolding technology according to claim 2, characterized in that: The air passage network includes a main air passage (403) connected to the main air hole (401) and a vertical branch air passage (404) connected to the auxiliary air hole (402). The main air passage (403) is connected to the vertical branch air passage (404). A horizontal branch air passage (405) is installed inside the main air hole (401) and is connected to the main air hole (401). An air inlet pipe (406) is installed on the main air hole (401). The air inlet pipe (406) passes through the lower mold (2) and its extended portion is connected to the pressure regulating valve (407).

5. The injection mold for the rear storage compartment of an electric vehicle based on air-jacking demolding technology according to claim 4, characterized in that: The diameter of the main airway (403) is 8-12 mm, and the diameters of the vertical branch airway (404) and the horizontal branch airway (405) are both 4-6 mm.

6. The injection mold for the rear storage compartment of an electric vehicle based on air-jacking demolding technology according to claim 1, characterized in that: The outer surface of the mold core (3) is provided with a nano-coating (301), the thickness of the nano-coating (301) is 5-10μm, and the surface roughness Ra≤0.1μm.

7. The injection mold for the rear storage box of an electric vehicle based on air-jacking demolding technology according to claim 1, characterized in that: One end of the cooling pipe (5) is a water inlet (501), which is connected to an external water supply system. The other end of the cooling pipe (5) is a water outlet (502), which is connected to an external wastewater recycling system.

8. The injection mold for the rear storage compartment of an electric vehicle based on air-jacking demolding technology according to any one of claims 1-7, characterized in that: The upper mold (1) is provided with a vacuum adsorption channel (101) and the vacuum degree is -0.06 to -0.09 MPa.

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