CN210011371U - A composite material forming mold - Google Patents

Abstract

The utility model discloses a combined material forming die. The molding die includes: the mould comprises a mould main body, a flexible auxiliary film bag and a mould cover. The mould body is internally provided with a heating unit, and the upper surface of the mould body is provided with a groove for bearing a resin-based composite material pre-forming body; the flexible auxiliary film bag is matched with the groove to form a vacuum-pumping space which completely wraps the preformed body; the mold cover has a pressurization interface, and the mold cover and the mold body cooperate to form a pressurization space that applies pressure to the evacuated space. Therefore, the heating unit is arranged in the die body, the die body is matched with the die cover to form the pressurizing space, heating and pressurizing operations are carried out independently, the production cycle is shortened, the production efficiency is improved, and the production cost is reduced.

Description

A composite material forming mold

technical field

The utility model relates to a composite material forming technology, in particular to a composite material forming mould.

Background technique

At present, the mass production process of automotive composite parts using prepreg as raw material is mainly autoclave process and molding process, but both processes are pressurized and heated for the whole mold, resulting in long production cycle and high production cost. The problem.

Based on the above requirements, it is a technical problem to be solved in the prior art to provide a composite material forming mold that enables the pressurizing and heating units to operate independently.

Utility model content

An embodiment of the present invention provides a composite material forming mold, which helps to shorten the production cycle, improve the production efficiency, and further helps to reduce the production cost.

In one embodiment of the present utility model, a composite material forming mold includes:

a mold main body, the inside of the mold main body has a heating unit, and the upper surface has a groove for carrying a resin-based composite material preform;

a flexible auxiliary film bag, the flexible auxiliary film bag cooperates with the groove to form an evacuation space that completely wraps the preform;

A mold cover, the mold cover has a pressure interface, and the mold cover cooperates with the mold body to form a pressurized space for applying pressure to the evacuated space.

Optionally, the inside of the mold body has a medium cavity, and one side of the mold body is provided with a heating medium inlet communicating with the medium cavity, and the other side is provided with a heating medium outlet communicating with the medium cavity .

Optionally, a heat conducting baffle is arranged inside the medium cavity.

Optionally, the setting height of the heating medium inlet is higher than the setting height of the heating medium outlet.

Optionally, the forming mold further has an auxiliary hot stage or an auxiliary cold stage supporting the mold body; wherein,

The auxiliary heat stage has a through-through heating medium circulation channel;

The auxiliary cooling stage has a through-through cooling medium circulation channel.

Optionally, the mold body has insertion grooves that are inserted and fitted with both side walls of the mold cover.

Optionally, sealing rings are provided at the plug-in ends of the two side walls of the mold cover.

Optionally, both sides of the flexible auxiliary film bag extend to the inside of the insertion slot to form a crimping section.

Optionally, the crimping segment has a protrusion embedded in the interior of the insertion groove.

Optionally, the mold body is provided with an evacuation interface communicating with the evacuation space, and the evacuation interface is located between the groove and the medium cavity.

It can be seen from the above that an embodiment of the present application provides a composite material forming mold. By arranging a heating unit inside the mold main body, and the mold main body and the mold cover cooperate to form a pressurized space, the heating and pressurization operations are performed separately, thereby. Helps to shorten the production cycle, improve production efficiency, and then help to reduce production costs.

Description of drawings

The following drawings merely illustrate and explain the present application schematically, and do not limit the scope of the present application.

1 is a schematic structural diagram of a composite material forming mold in one embodiment;

FIG. 2 is a schematic diagram of the forming mold in the embodiment shown in FIG. 1 having an auxiliary hot stage or an auxiliary cold stage.

Label description

100 Forming Dies

110 Mold body

111 Heating unit

112 grooves

113 Heating medium inlet

114 Heating medium outlet

115 Thermal Separator

116 sockets

117 Vacuum port

120 flexible auxiliary film bag

121 Crimp section

122 Raised

130 Mould Cover

131 Pressurized port

132 Seal

140 Auxiliary heat stage

141 Heating medium flow channel

150 Auxiliary Cold Stage

151 Cooling medium flow channel

160 Preforms

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific embodiments of the present utility model will now be described with reference to the accompanying drawings, in which the same reference numerals represent the same parts.

As used herein, "schematic" means "serving as an example, instance, or illustration" and any illustration, embodiment described herein as "schematic" should not be construed as a preferred or advantageous one Technical solutions.

In order to make the drawings concise, only the relevant parts of the present invention are schematically shown in each drawing, and do not represent the actual structure of the product. In addition, in order to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown, or only one of them is marked.

In order to make the purpose, technical solutions and advantages of the present utility model more clearly understood, the present utility model will be further described in detail below with reference to the accompanying drawings and examples.

FIG. 1 is a schematic diagram of the structure of a composite material forming mold in an embodiment; FIG. 2 is a schematic diagram of the forming mold in the embodiment shown in FIG. 1 having an auxiliary heating stage and an auxiliary cooling stage.

Referring to FIG. 1 , in one embodiment of the present invention, a composite material forming mold 100 includes a mold body 110 , a flexible auxiliary film bag 120 and a mold cover 130 .

The inside of the mold body 110 has a heating unit 111 , and the upper surface has a groove 112 for carrying the resin-based composite material preform 160 ; the flexible auxiliary film bag 120 cooperates with the groove 112 to form an evacuation space that completely wraps the preform 160 . ; The mold cover 130 has a pressure interface 131, and the mold cover 130 cooperates with the mold body 110 to form a pressurized space for applying pressure to the evacuated space.

Among them, the flexible auxiliary film bag 120 can be selected from a vacuum bag film or a silicone air bag. In order to make the preform 160 press more uniformly and save installation time, the flexible auxiliary film bag 120 is preferably a silicone air bag.

In order to improve the heating speed of the heating unit 111 , the present embodiment selects a heating method by applying a heating medium. The mold main body 110 has a medium cavity 111 inside, and one side of the mold main body 110 is provided with a heating medium inlet 113 communicating with the medium cavity 111 , and the other side is provided with a heating medium outlet 114 communicating with the medium cavity 111 . Wherein, the wall thickness of the mold body 110 is controlled within 20 mm, and for the molding process of the fiber-reinforced resin matrix composite material, the heating medium can be selected from steam.

In order to improve the heat transfer efficiency of the heating medium and make the grooves 112 more uniformly heated, a thermally conductive partition 115 is provided inside the medium cavity 111 ;

Referring to FIG. 2 , as shown by the dotted line in the figure, in order to improve the heating and cooling efficiency and shorten the production cycle during the molding of the composite material, the molding die 100 further has an auxiliary hot stage 140 or an auxiliary cooling stage 150 that supports the mold body 110 .

The auxiliary heating stage 140 has a through-through heating medium circulation channel 141 ; the auxiliary cold stage has a through-through cooling medium through-flow channel 151 . For the molding process of fiber-reinforced resin matrix composites, cooling water can be selected as the cooling medium. The preform 160 can achieve rapid heating and rapid cooling, and the temperature is uniform, and the temperature deviation can be controlled within 5°C.

In order to improve the disassembly and assembly efficiency of the forming mold 100 , the mold main body 110 has plug-in grooves 116 that are plug-fitted with the two side walls of the mold cover 130 . In order to improve the sealing performance of the pressurized space, sealing rings 132 are provided at the plug-in ends of the two side walls of the mold cover 130 .

In order to facilitate the formation of the evacuated space and improve the airtightness of the evacuated space, both sides of the flexible auxiliary film bag 120 extend to the inside of the insertion groove 116 to form the crimping section 121 . During the insertion process between the two side walls of the mold cover 130 and the insertion groove 116 , the crimping section 121 of the flexible auxiliary film bag 120 is pressed inside the insertion groove 116 .

In order to realize the limiting effect of the insertion groove 116 on the flexible auxiliary film bag 120 and prevent the flexible auxiliary film bag 120 from being removed during the vacuuming process, the crimping section 121 has a protrusion 122 embedded in the insertion groove 116 .

In order to facilitate external vacuuming equipment, the mold body 110 is provided with a vacuuming interface 117 that communicates with the vacuuming space, and the vacuuming interface 117 is located between the groove 116 and the medium cavity 111 .

The method for forming the fiber-reinforced resin-based composite material using the vacuum bag film provided in this embodiment as a forming mold for the flexible auxiliary film bag 120 includes:

(1) Open the heating medium circulation channel 141 of the auxiliary heat stage 140, pass steam heating, and keep the temperature at 150°C;

(2) The mold body 110 is moved from the auxiliary cooling stage 150 to the auxiliary heating stage 140 through the track, heated to 50°C-60°C, and then moved out to the auxiliary cooling stage 150, and the time is controlled within 30 seconds;

(3) The preform 160 is placed in the groove 112 of the mold body 110, and the time is controlled within 30 seconds;

(4) Place a vacuum bag film on the mold body 110, and the time is controlled within 5 minutes;

(5) The mold body 110 is moved to the auxiliary hot stage 140, and the time is controlled within 30 seconds;

(6) Clamp the mold cover 130 with the mold body 110 to ensure that the crimping section 121 of the vacuum bag is compacted, and the time is controlled within 30 seconds;

(7) Evacuate the evacuated space, the degree of vacuum is ≤-0.9MPa, and the time is controlled within 30 seconds;

(8) Passing steam through the heating medium inlet 113 of the mold body 110 for heating;

(9) Turn on the switch of the pressurizing port 131, adjust the pressure gauge, add a pressure of 0.2 MPa, and count the time, 30 seconds to 60 seconds;

(10) Adjust the pressure gauge, add a pressure of 0.6MPa, and time it for 15 minutes;

(11) After curing of the product, close the switch of the pressure interface 131, release the positive pressure, and turn off the vacuum;

(12) Mould opening;

(13) The mold body 110 is moved into the auxiliary cooling stage 150 through the track, and cooled to 50°C-60°C;

(14) Take out the product and remove the vacuum bag film.

The molding method of the fiber-reinforced resin-based composite material using the silicone air bag provided in this embodiment as the molding mold of the flexible auxiliary film bag 120 includes:

(1) Open the heating medium circulation channel 141 of the auxiliary heat stage 140, pass steam heating, and keep the temperature at 150°C;

(2) The mold body 110 is moved from the auxiliary cooling stage 150 to the auxiliary heating stage 140 through the track, heated to 50°C-60°C, and then moved out to the auxiliary cooling stage 150, and the time is controlled within 30 seconds;

(3) The preform 160 is placed in the groove 112 of the mold body 110, and the time is controlled within 30 seconds;

(4) Place a silicone air bag on the mold body 110, and the time is controlled within 30 seconds;

(5) Evacuate the evacuated space, the degree of vacuum is ≤-0.9MPa, and the time is 2-5 minutes;

(6) The mold body 110 is moved to the auxiliary hot stage 140, and the time is controlled within 30 seconds;

(7) Clamp the mold cover 130 with the mold body 110, and the time is controlled within 30 seconds;

(8) Passing steam through the heating medium inlet 113 of the mold body 110 for heating;

(9) Turn on the switch of the pressurizing port 131, adjust the pressure gauge, add a pressure of 0.2 MPa, and count the time, 30 seconds to 60 seconds;

(10) Adjust the pressure gauge, add a pressure of 0.6MPa, and time it for 15 minutes;

(11) After curing of the product, close the switch of the pressure interface 131, release the positive pressure, and turn off the vacuum;

(12) Mould opening;

(13) The mold body 110 is moved into the auxiliary cooling stage 150 through the track, and cooled to 50°C-60°C;

(14) Take out the silicone air bag and product.

A series of detailed descriptions listed above are only specific descriptions for the feasible embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any equivalents made without departing from the technical spirit of the present invention Embodiments or modifications, such as combination, division or repetition of features, should all be included within the protection scope of the present invention.

Claims (10)

1. A composite material molding die, comprising:

the mould comprises a mould main body, a heating unit and a groove, wherein the heating unit is arranged in the mould main body, and the groove for bearing a resin-based composite material preformed body is arranged on the upper surface of the mould main body;

the flexible auxiliary film bag is matched with the groove to form a vacuumizing space which completely wraps the preformed body;

a mold cover having a pressurization interface and cooperating with the mold body to form a pressurization space that applies pressure to the evacuated space.

2. The molding die according to claim 1, wherein the interior of the die main body has a medium cavity, and one side of the die main body is provided with a heating medium inlet communicating with the medium cavity and the other side is provided with a heating medium outlet communicating with the medium cavity.

3. The molding die of claim 2, wherein the interior of the media cavity is provided with a thermally conductive diaphragm.

4. The molding die according to claim 2, wherein a setting height of the heating medium inlet is higher than a setting height of the heating medium outlet.

5. The forming die of claim 1, further having an auxiliary hot station or an auxiliary cold station carrying the die body; wherein,

the auxiliary heating platform is provided with a through heating medium circulation channel;

the auxiliary cooling platform is provided with a through cooling medium circulation channel.

6. The molding die of claim 1, wherein the die body has insertion grooves for insertion-fitting with both sidewalls of the die cover.

7. The forming die of claim 6, wherein the plugging end portions of the two side walls of the die cover are provided with sealing rings.

8. The forming die of claim 6, wherein two sides of the flexible auxiliary film bag extend to the inside of the insertion groove to form a crimping section.

9. The forming die of claim 8, wherein the crimping section has a protrusion that is embedded into an interior of the insertion groove.

10. The molding die of claim 2, wherein the die body is provided with an evacuation port in communication with the evacuation space, and the evacuation port is located between the recess and the media cavity.

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