CN211165413U - Be suitable for automobile power battery case forming die of SMC material - Google Patents

Abstract

The utility model discloses a be suitable for automobile power battery case forming die of SMC material, automobile power battery case forming die of being suitable for SMC material includes cover half and movable mould, install transfer formula thimble shedder on automobile power battery case forming die's the cover half and the movable mould of being suitable for SMC material, still install operating mode monitoring device in the die cavity that automobile power battery case forming die's the cover half and the movable mould of being suitable for SMC material are constituteed. In this way, the utility model discloses can reduce the influence of sticking die to the product, stress concentration damages car power battery box surface when effectively preventing ejecting, is showing when reducing the product rejection rate and improves accent quick-witted efficiency.

Description

A kind of automobile power battery box forming mold suitable for SMC material

technical field

The utility model relates to the field of electric vehicles, in particular to a molding die for an automotive power battery box using SMC materials.

Background technique

With the development of the times and the advancement of science and technology, electric vehicles have gradually entered people's lives. As the power core of electric vehicles, automotive batteries need to be fixed in the power compartment of electric vehicles through corresponding battery boxes. Based on the working environment of electric vehicles , The automotive power battery box should have high comprehensive performance, and the carbon fiber reinforced resin SMC material is an ideal automotive power battery box material because of its high physical properties, temperature tolerance and electrical insulation properties. However, Carbon fiber reinforced resin SMC materials have high viscosity and poor flow properties. Therefore, it is required to use a press to extrude the carbon fiber resin SMC material placed in the mold cavity, so that it flows to fill the cavity, and is cured under high pressure and high temperature. Due to the high viscosity and poor fluidity of the material itself, uneven pressure at various positions inside the mold is prone to occur during the molding process, resulting in uneven material density of the finished product and reducing overall performance. Therefore, it takes a long adjustment process to find suitable working parameters. . And because it is cured under high temperature and high pressure, the molded product and the mold often have a large sticking force, which needs to be assisted by the ejector mechanism. The ejector pins are integrated with the top plate at the bottom of the mold. When the product is released from the mold, the pneumatic device exerts an ejection force on the top plate, thereby driving all the ejector pins to rise, and the cured product is separated from the mold surface. The ejector pins are ejected at the same time. Due to the uneven adhesion force of the product on the surface of the mold, the stress is usually concentrated on a certain ejector pin, resulting in partial ejection of the product, or insufficient ejection force, making it difficult to demold.

Utility model content

The main technical problem solved by the utility model is to provide an automobile power battery box mold suitable for carbon fiber reinforced resin SMC material, which can improve the production adjustment efficiency and reduce the adverse effect on the product during demoulding.

In order to solve the above-mentioned technical problems, a technical solution adopted by the present invention is to provide a molding die for automobile power battery box suitable for SMC material, and the molding die for automobile power battery box suitable for SMC material includes a fixed die and a movable die, so Both the fixed mold and the movable mold are installed with a split-type ejector pin release device, and a working condition monitoring device is also installed in the mold cavity formed by the fixed mold and the movable mold.

In a preferred embodiment of the present invention, the split-type ejector demolding device includes several independent ejector mechanisms, the independent ejector mechanisms are composed of independent ejector cylinders and corresponding ejector pins, and the ejector pins can pass through the ejector pins provided on the mold body. The thimble hole extends into the mold cavity.

In a preferred embodiment of the present invention, the independent ejector mechanism is divided into two categories, one is the main ejector mechanism, and the other is the auxiliary ejector mechanism, and the main ejector mechanism is arranged in the central area of the vehicle power battery box during molding At the position with the highest wall thickness and strength, the auxiliary ejector mechanism is arranged at the corresponding position of the flange edge of the automobile power battery box when it is formed.

In a preferred embodiment of the present invention, the auxiliary ejector mechanisms are arranged symmetrically.

In a preferred embodiment of the present invention, the working condition monitoring device includes a temperature sensor and a pressure sensor, the temperature sensor and the pressure sensor are installed on the surface of the cavity of the fixed mold, and the temperature sensor and the pressure sensor pass through the data cable. External human-computer interface.

In a preferred embodiment of the present invention, the pressure sensor is arranged in the middle position, edge position and position with complex structure of the bottom of the fixed mold cavity.

In a preferred embodiment of the present invention, the temperature sensor is arranged in the middle of the bottom of the fixed mold cavity.

The beneficial effects of the utility model are as follows: the technical scheme of the present utility model is to arrange a split-type thimble system according to the shape characteristics of the mold, and the ejection sequence, speed and strength of the corresponding thimbles can be adjusted according to the degree of mucous membrane in different areas of the finished product, effectively preventing the ejection of the ejector pins. The stress concentration during exit damages the surface of the product, reducing the reject rate of finished products, and a working condition monitoring device is installed in the mold cavity, which can monitor the internal pressure gradient and temperature changes during molding in real time, and significantly improve the efficiency of machine adjustment.

Description of drawings

Figure 1 is a schematic diagram of the distribution of ejector pins, temperature sensors and pressure sensors in the fixed mold cavity;

Figure 2 is a schematic diagram of the installation structure of the thimble;

Figure 3 Schematic diagram of the installation structure of the temperature sensor;

The components in the drawings are marked as follows:

1. Main thimble mechanism, 2. Auxiliary thimble mechanism, 3. Temperature sensor, 4. Pressure sensor.

Detailed ways

The preferred embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, so that the protection scope of the present utility model can be more clearly defined. .

Please refer to the accompanying drawings, the embodiments of the present utility model include:

An automobile power battery box forming mold, the raw material used for the automobile power battery box is carbon fiber epoxy resin SMC material, the automobile power battery box forming mold includes a fixed mold and a movable mold, and the automobile power battery box forming mold A split-type ejector pin release device is installed on both the fixed mold and the movable mold, and a mold working condition monitoring device is also installed in the mold cavity composed of the movable mold and the fixed mold of the automobile power battery box forming mold. The split-type ejector demoulding device is composed of a plurality of independent ejector mechanisms, each independent ejector mechanism includes an independent ejection cylinder and a corresponding ejector pin, and the ejector pin can be driven by the ejector cylinder along the ejector pins arranged on the mold. The hole extends into the cavity to complete the ejection action. The mold working condition monitoring device includes a temperature sensor and a pressure sensor arranged in the mold cavity.

The independent thimble mechanisms are divided into two categories, one is the main thimble mechanism 1, and the other is the auxiliary thimble mechanism 2. There are three main thimble mechanisms 1 in total, which are evenly arranged along the centerline of the vehicle power battery box when it is formed. Because the position corresponds to the position with the highest product wall thickness and the highest strength, it can withstand a large thrust, and the middle position helps to spread the local force evenly to the surrounding, further reducing the local pressure, the auxiliary ejector mechanism 2 has a common 4 pieces, symmetrical in pairs, arranged along the corresponding positions of the flange edges of the automobile power battery box when it is formed. By laying the ejector pins in the above way, it can prevent the surface of the vehicle power battery box from being overstressed locally when the ejector pins are ejected, resulting in surface damage. Moreover, the main ejector pin mechanism and the auxiliary ejector pin mechanism are symmetrically distributed, which is beneficial to make correspondence according to the principle of symmetry when local mold sticking occurs. Eject adjustment.

The temperature sensor 3 and the pressure sensor 4 are arranged at the bottom of the mold cavity of the fixed mold, and a human-computer interface is externally connected through a data line. The reason why it is set at the bottom of the fixed mold cavity is to reduce the direct influence of the gate feed on the real-time data of the temperature sensor and pressure sensor. Wherein, the temperature sensor 3 is arranged at the middle position of the bottom of the fixed mold cavity, and this position has a high indication significance for the fluid temperature in a stable state. Among them, there are 3 pressure sensors 4 which are respectively arranged in the center of the fixed mold cavity, the edge position, the position with complex structure, and the position near the middle of the mold cavity, which can effectively reflect the pressure gradient of the fluid at different positions during the molding process, and then confirm the edge position. And whether the filling action is completed at the complex structure position can prevent the product from forming defects.

In actual production, when the carbon fiber epoxy resin SMC sheet is put into the automotive power battery box mold made according to the utility model, it will be placed in the middle of the battery box. cavity. On-site operators can monitor and monitor the solidification temperature data of the blank through the central temperature sensor 3 arranged in the middle of the product through the man-machine interface and the pressure sensor 4 installed near the edge area and the pressure sensor 4 installed in the position with complex structure Given the dynamic pressure data, carefully observe the pressure state and the overall pressure gradient of the SMC material during curing. In particular, monitoring the area with complex structure and adjusting the equipment parameters can make the pressure reach the desired value and prevent the problem of partial filling of the product or partial enrichment of fiber material during molding. Thereby, the problems caused by the high viscosity and poor fluidity of the material of the battery box after using the carbon fiber epoxy resin SMC material as the raw material compared with the traditional glass fiber unsaturated resin are solved. The real-time monitoring of materials in the mold forming process can provide reference and data support for the timely adjustment of subsequent process parameters and material delivery. This greatly shortens the trial production time for parameter adjustment. The product quality can be monitored in real time, and in the event of an abnormality in the equipment, it can be warned in time to reduce losses.

In addition, in this embodiment, a split-type ejector mechanism is provided, and the split-type ejector mechanism optimizes the position of the ejector pin according to the special shape of the automobile power battery box. Because the battery flanges are provided with multiple insert reinforcing ribs, the structure is complicated, the stress is concentrated at the R corner and is at the edge position, and the finished product has relatively little reinforcing fiber content and low strength, so four symmetrical auxiliary ribs are arranged. Thimble mechanism 2. In addition to the four auxiliary ejector mechanisms 2 on the flange side, three main ejector mechanisms 1 are arranged in the middle area of the product, where the wall thickness and strength are the highest, as the main ejection force-bearing mechanisms. All thimble mechanisms are relatively independent, and the on-site operator can adjust the ejection sequence, speed and strength of each thimble according to the different mucosal levels in each area. Prevent the surface of the finished car power battery box from being damaged by the ejector pin due to the excessive concentration of local force and the fast ejection force. Or because the partial ejection force is insufficient and cannot be ejected, the ejection is uneven, and the finished product of the automotive power battery box is partially deformed, and the problem of cracks or internal stress concentration occurs in the finished product of the automotive power battery box, which significantly improves the performance of the automotive power battery box. Yield rate. After the debugging is completed, the program can be set through the hydraulic system of the press to automatically control the ejection sequence, speed and strength of each thimble. at the same time.

The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the patent of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other Relevant technical fields are similarly included in the scope of patent protection of the present invention.

Claims (7)

1. an automobile power battery box forming die suitable for SMC material, the automobile power battery box forming die suitable for SMC material comprises a fixed die and a movable die, and it is characterized in that, the fixed die and the movable die are all equipped with a splitter. A movable ejector pin demolding device is provided, and a working condition monitoring device is also installed in the mold cavity composed of the fixed mold and the movable mold. 2. The automobile power battery box forming mold suitable for SMC material according to claim 1, characterized in that, the split-type ejector demoulding device comprises several independent ejector mechanisms, and the independent ejector mechanisms are composed of independent ejector cylinders and corresponding ejector pins. It consists of an ejector pin, and the ejector pin can extend into the mold cavity through the ejector pin hole provided on the mold body. 3. The automobile power battery box molding die suitable for SMC material according to claim 2, wherein the independent ejector mechanism is divided into two categories, one is the main ejector mechanism, and the other is the auxiliary ejector mechanism. The main thimble mechanism is arranged at the position with the highest wall thickness and strength in the central area of the automobile power battery box when it is formed, and the auxiliary thimble mechanism is arranged at the corresponding position of the flange edge when the automobile power battery box is formed. 4 . The automobile power battery box forming mold suitable for SMC material according to claim 3 , wherein the auxiliary ejector mechanism is arranged symmetrically. 5 . 5. The automobile power battery box forming mold suitable for SMC material according to claim 1, wherein the working condition monitoring device comprises a temperature sensor and a pressure sensor, and the temperature sensor and the pressure sensor are installed on the mold of the fixed mold. Inside the cavity, the temperature sensor and the pressure sensor are connected to a human-computer interface through a data line. 6 . The automobile power battery box forming mold suitable for SMC material according to claim 5 , wherein the pressure sensor is arranged in the middle position of the bottom of the fixed mold cavity, the edge position of the mold cavity and the position with complex structure. 7 . 7 . The automobile power battery box forming mold suitable for SMC material according to claim 5 , wherein the temperature sensor is arranged in the middle position of the bottom of the fixed mold cavity. 8 .

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