CN217968123U - Injection mold of new forms of energy balance car center cover - Google Patents

Abstract

The utility model discloses an injection mold for a center cover of a new energy balance vehicle, which comprises an injection mold body, the injection mold body includes a lower mold body, a sealing rubber pad is connected to the top of the lower mold body, and an upper mold is connected to the top of the lower mold body body, the inner part of the lower die body is embedded with the product body, the inner part of the lower die body is embedded with a demoulding assembly, the demoulding assembly includes a first mold platform, the inner part of the lower mold body is embedded with the first mold platform, and the lower mold body The inside of the body is embedded with a second mold platform, the top side of the second mold platform is connected with a protective strip, and the upper edge of the lower mold body is connected with a limit block. The utility model is a new energy balance vehicle center cover injection molding The mold assists the demoulding of the product, and the large contact area reduces the damage caused by partial contact to the product surface. In addition, the product and the first mold table are more consistent, so that the entire contact surface of the product can be stressed, and in the face of product adhesion When it is more serious, there is still a large operating space to reduce damage to the product.

Description

An injection mold for the center cover of a new energy balance car

technical field

The utility model relates to the technical field of injection molds, in particular to an injection mold for a center cover of a new energy balance vehicle.

Background technique

Electric balance car, also known as somatosensory car, thinking car, camera car and so on. There are mainly two types of single wheel and double wheel on the market. Its operating principle is mainly based on a so-called "dynamic stability", in which in the manufacture of the balance car, the shape is framed by the mold, and the injection mold processing is to first add plastic to the mold, and then the mold is continuously rotated along two vertical axes And make it heated, under the action of gravity and heat energy, the plastic in the mold is gradually and evenly coated, melted and adhered to the entire surface of the mold cavity, shaped into the required shape, and cooled and shaped.

In this regard, China's patent application number: CN109130112A discloses a mold for plastic injection molding that is convenient for cooling and demoulding, including a lower mold, a second top cap, a partition and a vent, and the top of the lower mold is fixed with a first guide column and a second guide column, the second top cap is installed on the top of the second guide column, the partition is fixed in the bottom groove, the control magnet is fixed on the top of the central axis, the first inner magnet and The top ends of the second inner magnets are all fixed with vertical plates, and functional springs are installed on the vertical plates, and the functional springs are connected to the inner wall of the top groove, and the vents are connected to the cooling pipes. The mold for plastic injection molding that is convenient for cooling and demoulding adopts a new structural design to improve the structure of the traditional plastic injection mold, so that the device can quickly cool the uncooled plastic products that are still in the mold after injection molding is completed. , so that the product after injection molding can be quickly separated from the mold, so that the mold can be injected again, and the production efficiency is improved. It is equipped with a ventilation port and a cooling pipe and is connected with it. After the product is cooled, it is demoulded. Among them, it takes a lot of time to demould after water-cooled molding, the demoulding efficiency is low, and the product is not cooled properly. The injection molding equipment directly Ejection will cause greater damage to the product surface.

In the application of injection molds, the product is ejected and cold-cut through the injection molding equipment. During the ejection and retrieval process, the force causes great damage to the product surface, and even directly causes the deformation of the product. When the product is attached or adsorbed On the mold, it is difficult to demould, and the operation difficulty and precision are high, and the number of defective products after demolding will increase accordingly.

In view of the above problems in the prior art, combined with the difficulty of injection molding demoulding, it will cause great damage to the product, and there are certain deficiencies in mold demoulding. Therefore, it is urgent to design an injection mold for the center cover of a new energy balance car to solve the problem. above question.

Utility model content

The purpose of this utility model is to provide an injection mold for the center cover of a new energy self-balancing vehicle, so as to solve the problem that demoulding is difficult in the above-mentioned background technology.

In order to achieve the above purpose, the utility model provides the following technical solutions: an injection mold for the center cover of a new energy balance vehicle, including an injection mold body, the injection mold body includes a lower mold body, and a sealing seal is connected to the top of the lower mold body A rubber pad, the upper mold body is connected to the top of the lower mold body, and the product body is embedded and connected to the inside of the lower mold body;

The inside of the lower mold body is embedded with a demoulding assembly, the demoulding assembly includes a first mold table, the inside of the lower mold body is embedded with a first mold table, and the inside of the lower mold body is embedded and connected There is a second mold table, the top side of the second mold table is connected with a protective bar, the upper edge of the lower mold body is connected with a limit block, and the bottom end of the second mold table is connected with a bottom supporting plate, so The inside of the lower mold body is provided with a sliding rod, the inside of the lower mold body is provided with a sliding groove, the inside of the sliding groove is provided with a groove, the sliding rod is embedded in the inside of the sliding groove, and the bottom supporting plate The bottom end of the bottom plate is fixedly connected with an insert block, and the two sides of the bottom end of the bottom support plate are connected with connecting blocks, and the inside of the connecting block is embedded with a rotating shaft, and the end of the rotating shaft is connected with a socket, and the inside of the socket A plunger is inserted, and a rubber sealing sheet is fixedly connected to the inner cavity wall of the lower mold body.

As a preferred technical solution of the present invention, the first mold platform is connected to the inside of the sliding groove through the bottom supporting plate, the sliding rod runs through the inside of the bottom supporting plate, and the sliding rod is obliquely arranged inside the sliding groove , the height of the left end of the left two sets of sliding rods is lower than that of the right end, and the height of the sliding rods gradually increases from left to right.

As a preferred technical solution of the present utility model, the top of the protective bar is arranged in an arc shape and fixedly connected with the second mold table, the width of the protective bar is equal to the width of the second mold table, and the protective bar The strips are respectively embedded in the inner side of the limit block.

As a preferred technical solution of the present utility model, the bottom surface of the lower mold body is provided with four groups of grooves, the cut surfaces of the four groups of grooves are semicircular, and the grooves and inserts are engaged with each other. , the sliding connection between the groove and the insert.

As a preferred technical solution of the present utility model, the rotating shaft and the sleeve are rotationally connected, the insertion rod penetrates the inside of the sleeve, and a pushing device is connected to the end of the sleeve.

As a preferred technical solution of the present utility model, the top of the upper mold body is connected with a moving assembly, the moving assembly includes a collar, the top of the upper mold body is connected with a collar, and the top of the upper mold body A limit frame is connected, and the limit frame is wrapped on the outer wall of the collar.

As a preferred technical solution of the present utility model, the bottom end of the upper mold body is fixedly connected with a clamping block, and the upper end of the clamping block is provided with an injection port, and the injection port is connected to the upper mold body and the clamping block. Both sides of the upper mold body are connected with a transmission block, and a transmission rod is embedded in the interior of the transmission block.

As a preferred technical solution of the present invention, the bottom end of the clamping block is provided with a slot, and the slot is located directly above the limiting block, the limiting block and the slot are matched, and the lower mold body The outer wall is surrounded by a support frame.

As a preferred technical solution of the present invention, the bottom end of the lower die body is connected with a cooling assembly, the cooling assembly includes a cooling bin, the bottom end of the lower die body is connected with a cooling bin, and the cooling bin and The contact surfaces between the lower mold bodies are filled with copper heat conduction sheets, and the copper heat conduction sheets are surrounded and connected to the upper surface of the cooling chamber.

As a preferred technical solution of the present utility model, a cooling pipe is embedded and connected to the inside of the cooling chamber, a water inlet pipe is installed on the upper end of the cooling pipe, and a water outlet pipe is connected to the end of the cooling pipe. The cooling pipe, The water inlet pipe and the water outlet pipe are connected.

Compared with the prior art, the beneficial effects of the utility model are:

1. The utility model provides a certain space for the demolding of the product by changing the size of its inner diameter during the demoulding period through the mutual cooperation between the first mold platform, the protective strip, the sliding rod and the groove, in which it can Avoid the adsorption of the product caused by the pressure difference. In addition, the ejection of the first mold table is used to assist the demoulding of the product. The large contact area reduces the damage to the product surface caused by partial contact. In addition, the product and the first mold table are more compact. The coincidence of the product makes the entire contact surface of the product able to bear the force, and there is still a large operating space in the face of serious product adhesion, which reduces the damage to the product, makes the output efficiency of the product higher, and has a demoulding operation. The advantage of simplicity.

2. The utility model is provided with the mutual cooperation between the collar, the limit frame, the transmission block and the transmission rod, and the precision in the docking operation of the upper mold and the lower mold of the mold is higher, which ensures the connection between the two. The upper part is more stable, which overcomes the impact of shaking and offset on the product. The four sets of transmission rods are respectively located on both sides of the lower die body and the upper die body. The stability has been significantly improved, and the docking accuracy has also been improved. seal between the two.

3. The utility model is equipped with a cooling chamber, a cooling pipe, a water inlet pipe and a water outlet pipe. After the product is injected, the mold itself is cooled by circulating water cooling, and the speed of product molding is accelerated by cooling down. The water inlet pipe is The cooling water has a shorter circulation path, which ensures the consistency of the cooling effect in the early stage and even the later stage of cooling, improves the cooling effect, accelerates the cooling of the product, and improves the production efficiency.

Description of drawings

Fig. 1 is the three-dimensional decomposition structure schematic diagram of the present utility model;

Fig. 2 is the three-dimensional structure schematic diagram of the present utility model;

Fig. 3 is the three-dimensional explosion structure schematic diagram of the utility model;

Fig. 4 is the schematic diagram of the three-dimensional structure of the upper mold body and the lower mold body in the closed state of the utility model;

Fig. 5 is a schematic diagram of the three-dimensional connection structure of the sliding rod and the sliding groove of the present invention;

Fig. 6 is a schematic diagram of the three-dimensional structure of the bottom pallet and the sliding rod of the present invention;

Fig. 7 is a schematic diagram of the three-dimensional structure of the cooling pipe and the water inlet pipe of the present invention.

In the figure: 1, injection mold body; 110, lower mold body; 120, sealing rubber pad; 130, upper mold body; 140, product body; 2, demoulding component; 210, first mold platform; 220, second Die table; 230, protective strip; 240, limit block; 250, bottom support plate; 260, sliding rod; 270, sliding groove; 280, groove; 290, insert block; 2110, connecting block; 2120, rotating shaft; , inserting sleeve; 2140, inserting rod; 2150, rubber seal; 3, moving component; 310, collar; 320, limit frame; 330, block; 340, injection port; 370, support frame; 4, cooling assembly; 410, cooling chamber; 420, cooling pipe; 430, water inlet pipe; 440, water outlet pipe.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figures 1-7, the utility model provides a technical solution for the injection mold of the center cover of the new energy balance car:

Embodiment one:

According to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, an injection mold for the center cover of a new energy balance vehicle includes an injection mold body 1, and the injection mold body 1 includes a lower mold body 110, and the lower mold The top of the body 110 is connected with a sealing rubber pad 120, the top of the lower mold body 110 is connected with an upper mold body 130, and the inside of the lower mold body 110 is embedded with a product body 140; the injection molding machine is also called an injection molding machine or an injection machine, and it is The main molding equipment for making thermoplastics or thermosetting materials into various shapes of plastic products using plastic molding molds. The injection system is one of the most important components of the injection molding machine. Generally, there are plunger type, screw type, and screw pre-plastic column. There are three main forms of plug injection type. Its function is that in a cycle of the injection molding machine, a certain amount of plastic can be heated and plasticized within a specified time, and the molten plastic can be melted by the screw under a certain pressure and speed. Inject into the mold cavity.

After the injection is completed, the molten material injected into the cavity is kept fixed. Firstly, the granular or powdery plastic is added into the barrel, and the plastic is melted by the rotation of the screw and the outer wall of the barrel, and then the machine performs mold clamping and The injection seat moves forward, so that the nozzle is close to the gate of the mold, and then the pressure oil is injected into the injection cylinder to push the screw forward, so that the molten material is injected into the lower-temperature closed cavity with high pressure and fast speed. In the mold, after a certain period of time and pressure, it is maintained and cooled to make it solidified and formed, and then the mold can be opened and the product can be taken out. The purpose of maintaining the pressure is to prevent the reflux of the molten material in the cavity, to replenish the material in the cavity, and to ensure that the product Have a certain density and size tolerance. The basic requirements of injection molding are plasticization, injection and molding.

Plasticization is the premise to realize and guarantee the quality of molded products. In order to meet the requirements of molding, the injection must ensure sufficient pressure and speed. At the same time, due to the high injection pressure, a correspondingly high pressure is generated in the mold cavity, so There must be sufficient clamping force.

The inside of the lower mold body 110 is embedded with a demoulding assembly 2, the demoulding assembly 2 includes a first mold table 210, the inside of the lower mold body 110 is embedded with the first mold table 210, and the inside of the lower mold body 110 is embedded with a The second mold table 220, the top side of the second mold table 220 is connected with a guard bar 230, the top of the guard bar 230 is arranged in an arc shape and is fixedly connected with the second mold table 220, the width of the guard bar 230 is equal to the first The width of the second mold table 220, the guard bars 230 are respectively embedded in the inner side of the limit block 240, and the two sides of the guard bar 230 are positioned by the limit block 240, and the sealing of the connection is also increased by the limit block 240, To make the sealing effect more excellent, to avoid leakage and overflow during injection molding, the upper edge of the lower mold body 110 is connected with the limit block 240, and the bottom end of the second mold table 220 is connected with the bottom supporting plate 250, and the lower mold body The inside of 110 is provided with a sliding rod 260, the first mold table 210 is connected to the inside of the sliding groove 270 through the bottom supporting plate 250, the sliding rod 260 runs through the inside of the bottom supporting plate 250, and the sliding rod 260 is obliquely arranged inside the sliding groove 270, The left two sets of sliding rods 260 are closer to the height of one end on the left side than the height of the right end, and the height of the sliding rods 260 gradually increases from left to right. When sliding, it not only drives the movement of the second mold table 220 and the first mold table 210, but also drives the rise of the first mold table 210 and the second mold table 220, through the first mold table 210 and the second mold table 220 The lift assists demoulding, and separates the product from the bottom surface of the lower mold body 110 to avoid product adsorption. In addition, when the first mold table 210 and the second mold table 220 are far away from each other, there are no left-right limited products. It is easier to demould, and it will fall out directly and fall into the cooling pool below to complete the cooling.

The inside of the lower mold body 110 is provided with a sliding groove 270, the inside of the sliding groove 270 is provided with a groove 280, the sliding rod 260 is embedded in the inside of the sliding groove 270, the bottom end of the bottom supporting plate 250 is fixedly connected with an insert 290, and the lower mold The bottom surface of the body 110 is provided with four groups of grooves 280, the cut surfaces of the four groups of grooves 280 are semicircular, the grooves 280 and the inserts 290 are engaged with each other, and the grooves 280 and the inserts 290 are slidingly connected. The way makes the connection between the two more stable, and can also ensure the convenience of operation. The semicircular design of the groove 280 is consistent with the semicircular design of the insert 290.

Both sides of the bottom end of the bottom support plate 250 are connected with connecting blocks 2110, the inside of the connecting block 2110 is embedded with a rotating shaft 2120, and the end of the rotating shaft 2120 is connected with a socket 2130, and an inserting rod 2140 is inserted inside the socket 2130, and the rotating shaft 2120 and The inserting sleeves 2130 are connected by rotation, the inserting rod 2140 runs through the inside of the inserting sleeve 2130, and the end of the inserting sleeve 2130 is connected with a pushing device, wherein the pushing device is an electro-hydraulic push rod, and the electro-hydraulic push rod is directly controlled by the upper end of the injection molding machine. Control, and then also control the movement of the insertion rod 2140, which is transmitted to the upper ends of the first mold table 210 and the second mold table 220 under the position change of the insertion rod 2140, and then assists in completing the demoulding. The inner cavity wall of the lower mold body 110 A rubber sealing sheet 2150 is fixedly connected to the top.

During specific use, the utility model is an injection mold for the center cover of a new energy balance car. During the preparation of the balance cover, the raw material in the molten state is extruded into the mold by the extruder of the injection molding machine, and the raw material is filled. To the inside of the mold, fill the vacant space in the mold to complete the injection molding. After the injection molding is completed, the product is formed and taken out, and the operation is completed by cooling. The mold is used for injection molding, demoulding and molding removal. The specific operations are as follows:

In the production of the center cover of the balance car, we need to select a mold of appropriate size and scale, clean the inner cavity of the mold, and clean the remaining plastic impurities inside. After the impurities are cleaned, check the sealing between the molds, mold inspection After the completion, install the mold correctly on the injection molding equipment. After the installation is completed, check the integrity of the equipment. After a series of inspections, start to work. The extruder at the upper end of the injection molding machine will heat the raw materials, and the heated raw materials The inside of the lower mold body 110 filled through the injection port 340, wherein the block 330 at the bottom of the upper mold body 130 is closely attached to the top of the lower mold body 110, and under the connection of the sealing rubber pad 120, the lower mold body 110 is enlarged. The connection with the upper mold body 130 makes the connection more airtight, and the raw material is filled into the inside of the lower mold body 110. After the molding is completed, the insertion rod 2140 is pushed through the electric push rod. When the insertion rod 2140 is After being pushed, the movement of the bottom pallet 250 is driven. When the bottom pallet 250 slides on the upper end of the sliding rod 260, the height of the bottom pallet 250 also changes during the sliding period. The sliding rod 260 not only drives the first mold table 210 and The movement of the second mold table 220, while moving, the rise of the first mold table 210 separates the product from the bottom surface of the lower mold body 110, and the separated product is easier to demould. Under the promotion of the second mold table 220, the force-bearing area is large, which reduces the damage to the product. In addition, when the position between the first mold table 210 and the second mold table 220 changes, the internal space of the mold is changed, so that it can be removed during demoulding. When it is more convenient, the mold will fall out after being pushed, and directly fall into the inside of the cooling pool directly below, and the product will be taken out after cooling and forming.

Embodiment two:

On the basis of Embodiment 1, as shown in Figure 1 and Figure 7, the top of the upper mold body 130 is connected with a moving assembly 3, the moving assembly 3 includes a collar 310, and the top of the upper mold body 130 is connected with a collar 310, The top of the upper die body 130 is connected to the limit frame 320, and the limit frame 320 is wrapped on the outer wall of the collar 310. When extruding from the extruder, the stability of the connection is increased by the wrapping of the collar 310. The upper die body 130 The bottom end of the upper mold body 130 is fixedly connected with a clamping block 330, the upper end of the clamping block 330 is provided with an injection port 340, the injection port 340 is connected to the upper mold body 130 and the clamping block 330, the two sides of the upper mold body 130 are connected with a transmission block 360, and the transmission block The inside of 360 is embedded with a transmission rod 350, and the bottom end of the block 330 is provided with a slot, and the slot is located directly above the limit block 240, and the limit block 240 is matched with the slot. When the block 330 is attached to the At the upper end of the lower mold body 110, the limit block 240 and the groove are engaged with each other, and the connection between the connections is enlarged through the labyrinth seal, and the sealing effect is more excellent. The outer wall of the lower mold body 110 is surrounded by support The frame 370 supports the edge of the block 330 through the support frame 370 , and also limits the movable space between the lower mold body 110 and the upper mold body 130 .

The bottom end of the lower mold body 110 is connected with a cooling assembly 4, the cooling assembly 4 includes a cooling chamber 410, the bottom end of the lower mold body 110 is connected with a cooling chamber 410, and the contact surface between the cooling chamber 410 and the lower mold body 110 is filled with copper heat conduction The sheet uses the physical properties of copper metal to exchange heat with isomorphic copper metal, and cools down the lower mold body 110 through heat conduction, thereby speeding up the cooling and forming of the product, and the copper heat conduction sheet is surrounded and connected in the cooling process. The upper surface of the warehouse 410, the inside of the cooling warehouse 410 is embedded with a cooling pipe 420, the upper end of the cooling pipe 420 is equipped with a water inlet pipe 430, and the end of the cooling pipe 420 is connected with a water outlet pipe 440, the cooling pipe 420, the water inlet pipe 430 and the water outlet pipe 440 are connected, wherein the cooling pipe 420 is separated by the water inlet pipe 430, the cooling water entering the inside of the cooling pipe 420 through the water inlet pipe 430 is divided into two streams, and flows out through two sets of water outlet pipes 440, and the cooling water circulates faster Short, the temperature of the cooling water is controlled, so that the cooling water can ensure the temperature required for a certain cooling effect.

During specific use, the utility model is an injection mold for the center cover of a new energy balance vehicle. During the injection molding operation, the upper mold body 130 and the lower mold body 110 are close to each other to realize the sealing inside the lower mold body 110. The product is produced by the prefabricated shape inside the lower mold body 110. When the lower mold body 110 and the upper mold body 130 move, the lower mold body 110 and the upper mold body 130 are pulled by the transmission block 360, so that the transmission block 360 is The upper end of the transmission rod 350 moves, and when the transmission block 360 slides on the transmission rod 350, the trajectory of the movement is limited, and the stability during the movement is also ensured, avoiding the occurrence of a gap between the lower mold body 110 and the upper mold body 130. The offset, avoiding the offset ensures the molding of the product and reduces the generation of defective products. In addition, when the raw material in the molten state is filled into the lower mold body 110, the temperature of the lower mold body 110 will gradually increase. In order to accelerate For the molding of internal products, the cooling liquid is filled into the cooling pipe 420 through the water inlet pipe 430. When the cooling liquid is stored in the cooling pipe 420, the circulation of the cooling liquid takes away the temperature inside the lower mold body 110, and the cooling pipe 420 Water outlet pipes 440 are provided on both sides to improve cooling efficiency by shortening the path length of cooling water.

In the description of the utility model, it should be understood that the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying Any device or element must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In the present utility model, unless otherwise specified and limited, for example, it may be a fixed connection, or a detachable connection, or integrated; it may be a mechanical connection, or it may be an electrical connection; it may be a direct connection, or It can be indirectly connected through an intermediary, or it can be the internal communication of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, those of ordinary skill in the art can understand the above terms in this document according to the specific situation. Concrete meaning in utility model.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (10)

1. An injection mold for a center cover of a new energy balance car, comprising an injection mold body (1), characterized in that: the injection mold body (1) includes a lower mold body (110), and the lower mold body (110) The top of the top is connected with a sealing rubber pad (120), the top of the lower mold body (110) is connected with an upper mold body (130), and the inside of the lower mold body (110) is embedded with a product body (140); The inside of the lower mold body (110) is embedded with a demoulding assembly (2), and the demoulding assembly (2) includes a first mold table (210), and the interior of the lower mold body (110) is embedded There is a first mold table (210), the inside of the lower mold body (110) is embedded with a second mold table (220), and the top side of the second mold table (220) is connected with a protective strip (230) , the upper edge of the lower mold body (110) is connected with a limit block (240), the bottom end of the second mold table (220) is connected with a bottom support plate (250), and the lower mold body (110) A sliding rod (260) is provided inside, a sliding groove (270) is provided inside the lower mold body (110), a groove (280) is provided inside the sliding groove (270), and a groove (280) is provided inside the sliding rod (260). ) is embedded in the sliding groove (270), the bottom end of the bottom pallet (250) is fixedly connected with an insert (290), and both sides of the bottom of the bottom pallet (250) are connected with connecting blocks (2110) , the inside of the connecting block (2110) is embedded with a rotating shaft (2120), the end of the rotating shaft (2120) is connected with a socket (2130), and the inside of the socket (2130) is inserted with a rod (2140 ), the inner cavity wall of the lower mold body (110) is fixedly connected with a rubber sealing sheet (2150). 2. The injection mold for the center cover of a new energy balance vehicle according to claim 1, characterized in that: the first mold table (210) is connected to the inside of the sliding groove (270) through the bottom support plate (250) , the sliding rod (260) runs through the inside of the bottom bracket (250), the sliding rod (260) is obliquely arranged inside the sliding groove (270), and the two groups of sliding rods (260) on the left side are close to the left side The height of one end is lower than that of the end with the right side, and the height of the sliding rod (260) gradually increases from left to right. 3. The injection mold for the center cover of a new energy balance vehicle according to claim 1, characterized in that: the top end of the protective strip (230) is arranged in an arc shape and is placed between the second mold table (220) Fixedly connected, the width of the protection bars (230) is equal to the width of the second mold table (220), and the protection bars (230) are respectively embedded in the inner sides of the limit blocks (240). 4. The injection mold of a new energy balance vehicle center cover according to claim 1, characterized in that: the bottom surface of the lower mold body (110) is provided with four groups of grooves (280), four groups The cut surface of the groove (280) is semicircular, the groove (280) and the insert (290) are engaged with each other, and the groove (280) and the insert (290) are slidably connected. 5. The injection mold for the center cover of a new energy balance vehicle according to claim 1, characterized in that: the rotating shaft (2120) is connected to the sleeve (2130) in rotation, and the insertion rod (2140) runs through Inside the socket (2130), a pushing device is connected to the end of the socket (2130). 6. The injection mold for the center cover of a new energy balance vehicle according to claim 1, characterized in that: a moving assembly (3) is connected to the top of the upper mold body (130), and the moving assembly (3) Including a collar (310), the top of the upper mold body (130) is connected with a collar (310), the top of the upper mold body (130) is connected with a limit frame (320), and the limit frame (320) ) wrapped in the outer wall of the collar (310). 7. The injection mold of a new energy balance vehicle center cover according to claim 1, characterized in that: the bottom end of the upper mold body (130) is fixedly connected with a block (330), and the block ( 330) is provided with an injection port (340), the injection port (340) is communicated with the upper mold body (130) and the block (330), and the two sides of the upper mold body (130) are connected with transmission blocks ( 360), the inside of the transmission block (360) is embedded with a transmission rod (350). 8. The injection mold for the center cover of a new energy balance vehicle according to claim 7, characterized in that: the bottom end of the block (330) is provided with a slot, and the slot is located at the limit block (240) Directly above, the limit block (240) is matched with the slot, and the outer wall of the lower mold body (110) is surrounded by a support frame (370). 9. The injection mold for the center cover of a new energy balance vehicle according to claim 1, characterized in that: the bottom end of the lower mold body (110) is connected with a cooling assembly (4), and the cooling assembly (4 ) includes a cooling bin (410), the bottom of the lower die body (110) is connected with a cooling bin (410), and the contact surface between the cooling bin (410) and the lower die body (110) is filled with copper heat conducting sheets , and the copper heat conducting sheet is connected around the upper surface of the cooling chamber (410). 10. The injection mold for the center cover of a new energy balance vehicle according to claim 9, characterized in that: a cooling pipe (420) is embedded and connected to the inside of the cooling chamber (410), and the cooling pipe (420) The upper end of the water inlet pipe (430) is installed, and the end of the cooling pipe (420) is connected with the water outlet pipe (440), and the cooling pipe (420), the water inlet pipe (430) and the water outlet pipe (440) are connected.

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