CN213472271U

CN213472271U - Forming die of composite material battery box upper cover capable of being vacuumized

Info

Publication number: CN213472271U
Application number: CN202021345072.7U
Authority: CN
Inventors: 董晓阳; 唐昌伟; 田建; 龚建峰
Original assignee: Liyang Kangben Composite Material Co ltd
Current assignee: Liyang Kangben Composite Material Co ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-06-18
Anticipated expiration: 2030-07-10

Abstract

The utility model relates to a but forming die of combined material battery box upper cover of evacuation, the bed die and the relative compound die that opens and shuts of formpiston face, continuous fibers reinforcing resin combined material layer is spread on the formpiston, silicon rubber gasbag and formpiston fixed connection, bed die and formpiston during the compound die, continuous fibers reinforcing resin combined material layer and silicon rubber gasbag form airtight die cavity, the vacuum pipeline stretches into to airtight intracavity, the air valve sets up on the vacuum pipeline and through the air valve open and close extraction exhaust airtight intracavity air. The forming die of the composite material battery box upper cover capable of being vacuumized, provided by the utility model, has simple structure and low manufacturing cost; the vacuum-pumping function in the forming process is achieved, the inflation pressure of the silicon rubber air bag is adjustable, the compression ratio range is large, the special requirement that the sealing material has a compression ratio of more than 50% is avoided, the stroke precision requirement and the control difficulty of a forming press are reduced, a high-quality product can be obtained, the repair rate of subsequent products is reduced, and the product cost is reduced.

Description

Forming die of composite material battery box upper cover capable of being vacuumized

Technical Field

The utility model belongs to the technical field of battery box upper cover forming die, concretely relates to but forming die of combined material battery box upper cover of evacuation.

Background

The composite material has the advantages of high specific modulus and specific strength, integration of the design and the manufacture of the composite material structure and the like, and becomes a light-weight preferred material for new energy electric vehicles. The new energy battery pack is used as a core technology of the new energy electric automobile, is a key for determining the development and popularization of the new energy electric automobile, and the safety of the new energy electric automobile is also a key index for the new energy electric automobile to be comprehensively pushed to the market.

The method for manufacturing the new energy electric automobile upper cover by using the continuous fiber reinforced resin matrix composite material is a main means for improving the strength of the composite material upper cover, reducing the weight of a battery pack and preventing thermal runaway. However, the continuous fiber composite material has some technical difficulties in the forming process, particularly the elimination of air between layers in the forming process is not complete, the quality of the product, particularly the apparent quality, is seriously affected, and in the forming process, because air is mixed between the continuous fiber layers, the mixed air is difficult to eliminate under the condition of no vacuum pumping, so that the defects of bubbles or glue deficiency and the like are formed in the product and the surface layer after curing, the subsequent finishing process is required for reworking, the manufacturing cost is greatly increased, and the product quality is reduced. The mature composite material upper cover forming die in the market at present adopts a high-temperature sealed conventional sealing ring no matter an SMC process or a PCM process, the compression ratio of the sealing ring is generally below 30%, and the sealing ring is generally arranged on the side surface of a male die, so that the requirements on the size of raw materials of the die are high, the cost of the die is high, and the cost reduction of composite material parts is not facilitated.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem that exists among the prior art, the utility model aims to provide a but forming die of combined material battery box upper cover of evacuation.

In order to realize the above purpose, reach above-mentioned technological effect, the utility model discloses a technical scheme be:

a forming die for an upper cover of a composite material battery box capable of being vacuumized comprises a female die, a male die, a continuous fiber reinforced resin composite material layer, an inflatable silicon rubber air bag, a vacuum pipeline and a vacuum air valve, wherein the female die and the male die are opened or closed oppositely, the continuous fiber reinforced resin composite material layer is laid on the male die, the silicon rubber air bag is fixedly connected with the male die, the female die, the male die, the continuous fiber reinforced resin composite material layer and the silicon rubber air bag form a closed cavity during die closing, the vacuum pipeline extends into the closed cavity, and the vacuum air valve is arranged on the vacuum pipeline and pumps and exhausts air in the closed cavity through the opening and closing of the vacuum air valve.

Furthermore, a groove matched with the silicon rubber air bag is arranged on one surface, facing the male die, of the female die.

Furthermore, the silicon rubber air bags are arranged in two groups and are symmetrically arranged on two sides of the male die.

Furthermore, the width of the sealing groove formed in the female die is 10 +/-1 mm larger than that of the silicon rubber air bag, the width of the sealing groove formed in the male die is equal to that of the silicon rubber air bag, and the silicon rubber air bag is fixedly connected with the sealing groove in the male die in a gluing mode.

Furthermore, the depth of the sealing groove on the female die is 18 +/-1 mm, and the width of the sealing groove on the female die is 40 +/-1 mm.

Furthermore, the depth of the sealing groove on the male die is 18 +/-1 mm, and the width of the sealing groove on the male die is 30 +/-1 mm.

Further, the height of the silicon rubber air bag is 40 +/-1 mm, and the width of the silicon rubber air bag is 30 +/-1 mm.

Furthermore, the continuous fiber reinforced resin composite material layer is prepared by adopting reinforced fibers and resin.

Further, the reinforcing fibers comprise basalt fibers, carbon fibers or glass fibers.

Further, the resin includes an epoxy resin, a phenolic resin, or an epoxy vinyl resin.

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

the utility model discloses a but forming die of combined material battery box upper cover of evacuation, including bed die, formpiston, continuous fiber reinforced resin combined material layer, inflatable silicon rubber gasbag, vacuum pipeline and vacuum pneumatic valve, the bed die carries out die sinking or compound die with the formpiston face relatively, and continuous fiber reinforced resin combined material layer is spread on the formpiston, silicon rubber gasbag and formpiston fixed connection, bed die and formpiston, continuous fiber reinforced resin combined material layer and silicon rubber gasbag form airtight die cavity during the compound die, and the vacuum pipeline stretches into to airtight intracavity, and the vacuum pneumatic valve sets up on the vacuum pipeline and through the air pneumatic valve open and close the extraction air of airtight intracavity of exhaust. The utility model provides a but the shaping die of composite material battery box upper cover of evacuation can obtain high-quality composite material battery box upper cover product, has high-quality apparent mass, has reduced follow-up product repair rate, reduces product cost; the structure is simple, and the manufacturing cost is low; the inflatable silicon rubber air bag is innovatively provided to be used on the mold seal, the vacuumizing function in the forming process is achieved, the inflation pressure of the sealed silicon rubber air bag can be flexibly adjusted, the compression ratio range is large, the special requirement that the sealing material has a compression ratio of more than 50% is avoided, the stroke precision requirement and the control difficulty of a forming press are reduced, the adopted vacuumizing forming mold can extract and discharge air in a sealed cavity in the forming process, the air in the sealed cavity is timely discharged, the defect that apparent bubbles are formed on the surface of a product in the forming process in an gathering mode is avoided, the quality of an upper cover of a composite material battery box is improved, and the application prospect is wide.

Drawings

FIG. 1 is a schematic view of the preliminary mold assembly process of the present invention;

FIG. 2 is a schematic view of the closed cavity formed after the mold is closed;

FIG. 3 is a schematic view of the utility model after vacuum pumping;

wherein, 1-female die; 2-a male die; 3-a continuous fiber reinforced resin composite layer; 4-a silicone rubber balloon; 5-vacuum pipeline; 6-vacuum valve.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the invention can be more easily understood by those skilled in the art, thereby making the scope of the invention more clearly defined.

Example 1

As shown in fig. 1-3, a forming mold for an upper cover of a composite material battery box capable of being vacuumized comprises a female mold 1 for forming the shape of the upper cover of the composite material, a male mold 2 for forming the shape of the upper cover of the composite material, a continuous fiber reinforced resin composite material layer 3, an inflatable silicone rubber air bag 4 for sealing the mold, a vacuum pipeline 5 for vacuumizing the mold and a vacuum air valve 6 for vacuumizing, wherein the female mold 1 and the male mold 2 are opened or closed in a way that the surfaces are opposite to each other under the condition of high temperature and high pressure to provide the forming pressure required by the upper cover of the composite material battery box and the structural shape required by the formed product, the continuous fiber reinforced resin composite material layer 3 is laid on the male mold 2, the silicone rubber air bags 4 are fixedly connected with the male mold 2, the silicone rubber air bags 4 are provided with two groups and symmetrically arranged at two sides of the male mold 2, one surface of the, when the die is closed, the female die 1, the male die 2, the continuous fiber reinforced resin composite material layer 3 and the silicon rubber air bag 4 form a closed cavity, the vacuum pipeline 5 extends into the closed cavity, the vacuum air valve 6 is arranged on the vacuum pipeline 5, the vacuum air valve 6 is opened under a certain condition, and air in the closed cavity is extracted and exhausted through the vacuum pipeline 5.

The width of the sealing groove formed in the female die 1 is 10 +/-1 mm larger than that of the silicon rubber air bag 4, the width of the sealing groove formed in the male die 2 is equal to that of the silicon rubber air bag 4, and the silicon rubber air bag 4 and the sealing groove of the male die 2 are fixedly connected in a gluing mode.

Preferably, the depth of the sealing groove on the female die 1 is 18 +/-1 mm, and the width of the sealing groove on the female die 1 is 40 +/-1 mm; the depth of a sealing groove on the male die 2 is 18 +/-1 mm, and the width is 30 +/-1 mm; the silicon rubber air bag 4 is high temperature resistant and inflatable, the height is 40 plus or minus 1mm, and the width is 30 plus or minus 1 mm.

Cutting the continuous fiber reinforced resin composite material layer 3 according to the structural shape, laying the continuous fiber reinforced resin composite material layer on the male die 2, and repeating the laying for 4 times in the laying direction [0/90 ]; the thickness of the single layer of the continuous fiber reinforced resin composite material layer 3 is 0.32mm, 0.16mm or 0.42mm, the layer number, the thickness and the like are flexibly selected according to actual requirements, the continuous fiber reinforced resin composite material layer 3 is made of reinforced fibers and resin, the reinforced fibers comprise basalt fibers, carbon fibers, glass fibers and the like, the resin comprises epoxy resin, phenolic resin, epoxy vinyl resin and the like, and the types of the fibers and the resin are not limited.

A use method of a forming die for an upper cover of a composite material battery box capable of being vacuumized comprises the following steps:

1) cutting the continuous fiber reinforced resin composite material layer 3 according to the required structural shape, and laying the continuous fiber reinforced resin composite material layer on the male die 2;

2) mounting a female die 1 on an upper platen of a forming press, wherein the geometric center of the female die 1 is superposed with that of the upper platen of the press, and locking and fixing the female die 1 and the forming press by using a fixed butt strap; mounting the male die 2 on a lower platen of a forming press, wherein the geometric center of the male die 2 is superposed with the geometric center of the lower platen of the press, and locking and fixing the male die 2 and the forming press by using a fixing butt strap;

3) starting a forming press, heating the forming press, heating a forming die to 80 +/-5 ℃, moving an upper platen of the forming press downwards and driving a female die 1 on the upper platen to descend towards a male die 2 at a speed of 1-3 m/min; when the lowest point of the female die 1 is 20 +/-0.5 mm away from the highest point of the male die 2, the descending speed of the female die 1 is adjusted to be 0.5 m/min;

4) when the female die 1 descends to be in contact with the surface of the high-temperature sealing silicon rubber air bag 4, an inflation valve communicated with the silicon rubber air bag 4 is opened, and the inflation pressure is 0.1-0.15 MPa; keeping the female die 1 to continuously descend for 2mm plus or minus 0.5mm, and keeping the silicon rubber air bag 4 inflated for 0.1 MPa plus or minus 0.01 MPa;

5) opening the vacuum air valve 6, starting vacuumizing, keeping vacuumizing for 1min, ensuring the vacuum degree of a vacuum pressure gauge to be less than or equal to-0.095 MPa, continuously heating to 150 +/-5 ℃, and pressurizing to 2 +/-0.2 MPa by a forming press;

6) and (3) maintaining the pressure and the temperature of the forming die for 8min, opening an inflation valve, exhausting and releasing pressure by the silicon rubber air bag 4, and driving the female die 1 to move upwards and open the die by the forming press.

The utility model discloses be used for combined material mould pressing technology with silicon rubber gasbag 4 and prepare and obtain required combined material battery box upper cover, solved the sealed problem of the evacuation structure of combined material mould pressing technology among the prior art, improved the apparent quality of product, reduced follow-up cost and the mould cost of doing over again to the apparent, can obtain high-quality combined material battery box upper cover product.

The part of the utility model which is not described in detail can be realized by adopting the prior art, and the description is not repeated here.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A forming die for an upper cover of a composite material battery box capable of being vacuumized is characterized by comprising a female die, a male die, a continuous fiber reinforced resin composite material layer, an inflatable silicon rubber air bag, a vacuum pipeline and a vacuum air valve, wherein the female die and the male die face oppositely to each other for die opening or die closing, the continuous fiber reinforced resin composite material layer is laid on the male die, one surface of the female die facing the male die is provided with a groove matched with the silicon rubber air bag, the silicon rubber air bag is fixedly connected with the male die, the silicon rubber air bag is provided with two groups which are symmetrically arranged on the left side and the right side in the male die and positioned between the female die and the male die, the silicon rubber air bag is communicated with the air charging valve for charging or discharging air, the female die, the male die, the continuous fiber reinforced resin composite material layer and the silicon rubber air bag form a closed cavity when the, the width of the sealing groove formed in the female die is 10 +/-1 mm larger than that of the silicon rubber air bag, the width of the sealing groove formed in the male die is equal to that of the silicon rubber air bag, and the silicon rubber air bag is fixedly connected with the sealing groove in the male die in a bonding mode.

2. The mold for molding an upper cover of an evacuable composite battery case according to claim 1, wherein the sealing groove of the female mold has a depth of 18 ± 1mm and a width of 40 ± 1 mm.

3. The mold for molding an upper cover of an evacuable composite battery case according to claim 1, wherein the sealing groove of the male mold has a depth of 18 ± 1mm and a width of 30 ± 1 mm.

4. The mold for molding an upper cover of an evacuable composite battery case according to claim 1, wherein the height of the silicone rubber bladder is 40 ± 1mm and the width of the silicone rubber bladder is 30 ± 1 mm.