CN223278586U - A cone barrel type rapid temperature rise and fall resin transfer heating molding mold - Google Patents

Abstract

The utility model relates to a cone barrel-shaped rapid heating and cooling resin transfer heating molding mold. The existing heating and cooling speed is slow, resulting in a large temperature difference between the inner and outer surfaces of the product, seriously affecting the product quality. The utility model includes a core mold and an outer mold. The upper and lower ends of the outer mold are respectively provided with a base and an upper cover. The core mold is sleeved in the outer mold. The core mold is a cylindrical body with a small upper part and a large lower part, and a circle of lower limit steps is provided at the bottom; the outer mold is composed of three arc-shaped pieces to form a circular ring. The two side edges and the upper and lower edges of each arc-shaped piece are respectively turned outward, and the two side edges and the upper and lower edges are respectively provided with threaded connection holes. The inner sides of the upper and lower flanges of one of the arc-shaped pieces are respectively integrally formed with connecting ears, and the connecting ears are respectively provided with a glue outlet hole and a glue injection port. The upper part of the inner wall of the outer mold is provided with a circle of upper limit steps. The utility model can quickly heat and cool, the temperature of the inner and outer surfaces of the product is uniform, and it has the characteristics of simple structure, easy operation, high precision, and long service life.

Description

Cone barrel type rapid temperature rise and fall resin transfer heating forming die

Technical Field

The utility model relates to the technical field of forming dies, in particular to a cone-type rapid temperature-rise and fall resin transfer heating forming die.

Technical Field

The rapid temperature-rising resin transfer heating forming die is a hypersonic weapon cabin thermal protection sleeve forming die in the aviation field, the thermal protection sleeve is formed by compounding a quartz fiber preform and phenolic resin, the surface temperature of the thermal protection sleeve can reach 1300 ℃ in the service period, and the requirements of heat insulation and dimensional property of the outer surface under extreme environments are required to be met. Since the product is used in aviation, any quality problems, such as during use, can have serious consequences. The special use scene and high raw material cost of the product have extremely high requirements on the quality and the yield of the product, and also mean extremely high requirements on the forming die, and particularly the temperature rising speed and the temperature uniformity of the die are extremely important.

RTM molding is a closed-mold molding technology improved from hand lay-up molding, and the basic principle is that a reinforcing material (such as glass fiber or carbon fiber) is laid in a closed-mold cavity, then a low-viscosity resin is injected into the mold cavity by pressure, so that the reinforcing material is soaked by the resin, and finally the resin is heated, solidified and molded.

In the RTM molding process, the design of the mold is related to the surface quality, the internal quality, the dimensional accuracy and the like of the product, and the final quality of the product is directly affected, so that the design of the RTM molding mold plays a crucial role in the whole RTM molding process.

Because the product is finally required to be heated, solidified and molded, the die is required to have higher dimensional accuracy and sealing performance and better heat conductivity.

In the past mould design mostly the structure of mold core and outer die integrative combination formation awl barrel-shaped die cavity, because the mold core itself is located inside and be the solid, and the wall thickness of outer die is thinner relatively to because the mould often is steel mould, the mold core is the entity, and the temperature rising and lowering speed is very slow, can appear that the inside and outside temperature difference of mold core is too big, leads to the inside and outside surface temperature difference of product too big, seriously influences product quality, has still increased manufacturing cost.

Disclosure of utility model

In view of the above, the utility model provides a cone-shaped rapid temperature rise and fall resin transfer heating forming die which can realize rapid temperature rise and fall, has uniform temperature of the inner surface and the outer surface of a product, and has the characteristics of simple structure, easy operation, high precision, good sealing performance, long service life and the like.

The technical scheme includes that the quick temperature rise and fall resin transfer heating forming die comprises a core die and an outer die, wherein a base and an upper cover are respectively arranged at the upper end and the lower end of the outer die, the core die is sleeved in the outer die, the core die is a cylindrical body with a small upper part and a large lower part, a circle of lower limit steps are arranged at the bottom of the core die, the outer die is formed into a circular ring by 3 arc-shaped sheets, two side edges and the upper edge and the lower edge of each arc-shaped sheet are respectively and outwards turned, threaded connecting holes are respectively formed in the turned-over edges of the two side edges and the upper edge and the lower edge, connecting lugs are respectively and integrally formed in the inner sides of the upper edge and the lower edge of one arc-shaped sheet, glue outlet holes and glue injection holes are respectively formed in the connecting lugs, a circle of limit steps are arranged on the upper part of the inner wall of the outer die, and the wall thickness of the core die is the same.

Further, a circle of sealing grooves I are respectively arranged on the upper end face and the lower end face of the core mold.

Further, the upper surface of base is provided with annular seal groove two, still is provided with the sled groove on the circumference.

Further, the base and the upper cover are connected with the core mold and the outer mold through bolts.

Further, the glue outlet is arranged on the upper connecting lug, and the glue injection port is arranged on the lower connecting lug.

Further, 2 sealing grooves are arranged inside and outside.

Compared with the prior art, the utility model has the advantages that:

1) The core mould is arranged into the cylindrical body with the small upper part and the large lower part, so that heat flow can enter the core mould through the upper surface and the lower surface of the mould, rapid temperature rise and reduction are realized, the wall thickness of the core mould is the same as that of the outer mould, and the uniform temperature of the inner surface and the outer surface of a product can be basically realized.

2) The upper ends of the 3 outer dies are provided with upper limit steps for ensuring the thickness of the product.

3) The peripheral flange of the outer die is arranged to strengthen the outer die, prevent the die from deforming and prolong the service life.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic structural view of the upper cover of the present utility model.

Fig. 3 is a schematic structural view of the base of the present utility model.

Fig. 4 is a schematic structural view of the core mold of the present utility model.

Fig. 5 is a schematic structural view of an outer mold of the present utility model.

The mark illustration comprises a core mold 1, an outer mold 2, an outer mold 3, a base 4, an upper cover 5, a first sealing groove 6, a threaded connecting hole 7, a prying groove 8, a positioning pin hole 9, an upper limiting step 10, a glue outlet 11, a glue injection port 12, a lower limiting step 13 and a second sealing groove.

Detailed Description

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, or directly connected, or in communication with the interior of two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The embodiment provides a cone-shaped rapid temperature rise and fall resin transfer heating forming die, which comprises a core die 1 and an outer die 2, wherein the core die 1 is sleeved in the outer die 2, a base 3 and an upper cover 4 are respectively arranged at the upper end and the lower end of the outer die 2, the base 3 and the upper cover 4 are respectively arranged in threaded connection holes, and the core die 1 and the outer die 2 are connected with the base 3 and the upper cover 4 through bolts.

As an implementation mode in this embodiment, mandrel 1 is small upper and small lower big cylinder, and the wall thickness is 40mm, and the bottom is provided with round spacing step 12 down, is used for guaranteeing the product thickness of die cavity lower half, is provided with round width 5mm degree of depth 3 mm's seal groove one 5 respectively on the up and down terminal surface for installing the sealing strip, guarantees the leakproofness of mould, and small upper and small lower big cylinder can make the heat flow enter into the mold core inside through the mould upper and lower surface, realizes quick heating up and cooling down, and the mandrel wall thickness is the same with the external mold, realizes that product internal and external surface temperature is even, as shown in figure 4.

As an implementation manner in this embodiment, the outer mold 2 is formed by 3 arc-shaped sheets, two sides and upper and lower sides of each arc-shaped sheet are respectively turned outwards, threaded connection holes are respectively formed in the turned-up edges of the two sides and the upper and lower sides, connection lugs are respectively formed in the inner sides of the upper and lower turned-up edges of one arc-shaped sheet in an integrated manner, a glue outlet 10 and a glue injection port 11 are respectively formed in the connection lugs, the glue outlet 10 is formed in the upper connection lugs, and the glue injection port 11 is formed in the lower connection lugs. The upper part of the inner wall of the outer mold is provided with an upper limit step 9 for ensuring the thickness of the product, the periphery of the outer mold is provided with a turned edge for strengthening the strength of the outer mold, preventing the mold from deforming and prolonging the service life, and the turned edges at the left side and the right side are provided with a threaded connecting hole 6, a positioning pin hole 8 and a sealing groove with the width of 5mm and the depth of 3mm for installing a sealing strip, a positioning pin and fastening the outer mold, as shown in figure 5.

As an implementation manner in this embodiment, the upper surface of the base 3 is provided with a second sealing groove 13 with 2 circles of ring shapes, which is used for installing a sealing strip to ensure tightness. The second ring-shaped sealing groove is internally and externally arranged, the second sealing groove 13 is 5mm wide and 3mm deep, and a prying groove 7 is further formed in the circumference of the base 3 and used for prying the outer die during die stripping, as shown in fig. 4.

As an implementation manner in this embodiment, the base and the upper cover of the mold are annular, so that heat flow can be ensured to enter the mold core during heating.

As an implementation manner in this embodiment, the core mold 1 and the outer mold 2 have the same height, and the upper limit step 9 of the outer mold and the lower limit step 12 of the core mold 1 form a mold cavity.

As an implementation mode in the embodiment, the die has the height of 700mm and the diameter of 600mm, and the die material is 6061 aluminum alloy material, so that the die has good comprehensive mechanical property and higher heat conduction property, and can meet the die precision and service life.

The working method of the utility model comprises the following steps:

when the die is used, the 5.5mm sealing strips are firstly arranged in the die base, the core die and the sealing grooves of the outer die (note that the sealing strip connecting parts are connected in an oblique angle lap joint mode, and silicone rubber is coated at the lap joint positions).

And installing the core mold on the base in alignment with the threaded connection hole and locking the core mold by using a bolt.

And the working surfaces of the core mold and the outer mold are sprayed with a release agent or attached with Teflon, so that the product can be conveniently released after being molded.

The fiber preform is sleeved on the mandrel (note that, because of the lower strength of the fiber preform, the violent sleeving is prohibited so as not to damage the fiber preform.

And installing an outer die, aligning the lower end of the outer die with the step at the lower end of the core die, installing the outer die, installing a positioning pin and locking a bolt.

And aligning threaded connection holes of the upper cover and the core mold, installing the upper cover and locking by bolts.

After the installation is finished, the resin injection process can be carried out through the glue injection port and the glue outlet.

And after glue injection, the mould is placed into a curing furnace, and curing is carried out according to a resin curing system.

After solidification, the pry bar is inserted into a pry point on the die base to pry the outer die, the outer die is disassembled in sequence, and the product is lifted upwards while rotating on the core die, so that the die can be easily demolded.

In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed above.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (6)

1. The cone-barrel type rapid temperature rise and fall resin transfer heating forming die is characterized by comprising a core die (1) and an outer die (2), wherein a base (3) and an upper cover (4) are respectively arranged at the upper end and the lower end of the outer die (2), the core die (1) is sleeved in the outer die (2), the core die (1) is a cylindrical body with a small upper part and a large lower part, a circle of lower limit steps (12) are arranged at the bottom, the outer die (2) is formed by 3 arc-shaped sheets, two side edges and the upper edge and the lower edge of each arc-shaped sheet are respectively outwards turned, threaded connecting holes are respectively arranged on the two side edges and the outer turned edges of the upper edge and the lower edge, connecting lugs are respectively integrally formed at the inner sides of the upper edge and the lower turned edges of one arc-shaped sheet, glue outlet holes (10) and glue injection openings (11) are respectively arranged on the connecting lugs, and the upper part of the inner wall of the outer die (2) is provided with a circle of limit steps (9), and the core die (1) and the outer die (2) are the same in wall thickness.

2. The cone-type rapid thermal insulation resin transfer heating forming die according to claim 1 is characterized in that a circle of sealing grooves I (5) are respectively arranged on the upper end face and the lower end face of the core die (1).

3. The rapid-heating resin transfer heating forming die for the conical barrel type according to claim 1 or 2, wherein the upper surface of the base (3) is provided with an annular sealing groove II (13), and a prying groove (7) is further formed in the circumference.

4. A rapid thermal insulation resin transfer heating forming die for a cone barrel according to claim 3, wherein the base (3) and the upper cover (4) are connected with the core die (1) and the outer die (2) through bolts.

5. The rapid thermal insulation resin transfer heating forming die with the cone barrel type according to claim 4, wherein the glue outlet (10) is arranged on the upper connecting lug, and the glue injection port (11) is arranged on the lower connecting lug.

6. The cone-shaped rapid thermal insulation resin transfer heating forming die according to claim 5, wherein 2 sealing grooves (13) are formed inside and outside.