CN216782549U

CN216782549U - High pressure RTM evacuation integral type structure of blowing

Info

Publication number: CN216782549U
Application number: CN202122881989.XU
Authority: CN
Inventors: 曾智; 王刚; 许召雄
Original assignee: Wuhan Yinbaoshan New Molding Technology Co ltd
Current assignee: Wuhan Yinbaoshan New Molding Technology Co ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-06-21
Anticipated expiration: 2031-11-23

Abstract

The application relates to a high-pressure RTM vacuumizing and blowing integrated structure, which comprises a plugging rod, a driving assembly, a gas path and a through hole, wherein the driving assembly is used for driving the plugging rod to linearly reciprocate; the end face where the output end of the driving assembly is located is connected with the outer end face of the mold; the plugging rod is coaxially arranged in the through hole, one end of the plugging rod close to the interior of the mold is a plugging end, and one end of the through hole close to the interior of the mold is matched with the plugging end; one end of the through hole close to the interior of the mold is communicated with the interior of the mold, and the gas path is communicated with the through hole; a first sealing element is arranged between the plugging end and the inner side wall of the through hole. According to the sealing device, the first sealing element is arranged between the plugging end and the inner side wall of the through hole, and the rubber material in the die can be prevented from flowing into the through hole along a gap between the plugging end and the inner side wall of the through hole through the sealing effect of the first sealing element, so that the occurrence of a rubber leakage field is further caused; the application still is equipped with second sealing member and third sealing member, can prevent to blow gas structure evacuation or blow gas when leaking.

Description

High pressure RTM evacuation integral type structure of blowing

Technical Field

The application relates to the technical field of molds, in particular to a high-pressure RTM vacuumizing and blowing integrated structure.

Background

Injection molding is a method in which a completely molten plastic material is injected into a mold cavity by an injection device at a certain temperature during injection molding, and a molded product is obtained after cooling and solidification. The injection molding process usually uses a blow-up structure, which is used to blow air into the mold.

In the related art, a blowing structure for plastic product production exists, which is widely applied to an SMC (sheet molding compound) mould pressing die and comprises an oil cylinder, a driver needle (blowing needle) and a driver cylinder. The gas path directly processes gas holes on the die and the ejector sleeve, the oil cylinder is fixed on the die, and the ejector pin is fixed on an oil cylinder piston rod through an ejector pin cushion block and an oil cylinder connecting block; the ejector sleeve is fixed on the die through the ejector sleeve pressing block. The work flow of the blowing structure is as follows: the pneumatic equipment inflates air into the air path, sufficient air pressure is always ensured, the oil cylinder drives the ejector pin to move, and the ejector cylinder is fixed on the die through the ejector cylinder pressing block and is not moved. And (3) the ejector pin is in an ejection state before the die is closed, the ejection state of the ejector pin is continued until the die is closed, then the rubber material is filled, and then the die is subjected to pressure maintaining to finish the product solidification. And after the pressure maintaining of the mold is finished, the ejector pin returns, and at the moment, the ejector pin needs to be ensured to return to the back of the gas path. The gas in the gas circuit can blow into the ejector sleeve, the air pressure equipment can maintain the pressure of the gas circuit all the time, the process can continue to blow into the inner cavity of the mold all the time, and then the mold completes the functions of mold opening, ejection and piece taking.

In the actual production process, the blowing structure has some defects, and if the fluidity of the rubber material injected into the mold is high, for example, when high-pressure RTM products are produced, the rubber material is easy to flow into the air passage along the gap between the ejector pin and the ejector cylinder, which causes the occurrence of rubber leakage.

Disclosure of Invention

The embodiment of the application provides a high pressure RTM evacuation integral type structure of blowing to solve above-mentioned problem.

On the first hand, the high-pressure RTM vacuumizing and blowing integrated structure comprises a plugging rod, a driving assembly, an air passage and a through hole, wherein the driving assembly is used for driving the plugging rod to linearly reciprocate; the end face where the output end of the driving assembly is located is connected with the outer end face of the die; the plugging rod is coaxially arranged in the through hole, one end of the plugging rod close to the interior of the mold is a plugging end, and one end of the through hole close to the interior of the mold is matched with the plugging end; one end of the through hole, which is close to the interior of the mold, is communicated with the interior of the mold, and the gas path is communicated with the through hole; and a first sealing element is arranged between the plugging end and the inner side wall of the through hole.

In some embodiments, the blocking end is arranged in a circular truncated cone or a truncated pyramid shape, and the smaller of the two bottom surfaces of the blocking end is arranged close to the inside of the mold.

In some embodiments, the blocking end peripheral wall is dug to have an insertion groove, and the first sealing member is inserted into the insertion groove.

In some embodiments, the number of the insertion grooves is greater than 1.

In some embodiments, a limiting member is disposed in the through hole, the limiting member is sleeved on the blocking rod, and a second sealing member is disposed between the limiting member and the blocking rod.

In some embodiments, a heat shield is disposed between the drive assembly and the exterior surface of the mold.

In some embodiments, a connecting block is arranged between the output end of the driving assembly and the blocking rod, the output end is in threaded connection with the connecting block, and one end of the blocking rod is connected with the connecting block in an embedded manner.

In some embodiments, the through hole is stepped and comprises a first through part and a second through part, the first through part is arranged close to the driving assembly, and the diameter of the first through part is larger than that of the second through part; the limiting piece is arranged in the first through part; the first communicating part is in threaded connection with the second communicating part at the connecting surface, and a third sealing element is arranged between the first communicating part and the second communicating part at the connecting surface and the limiting part.

In some embodiments, the air passage is connected to the second passage.

In some embodiments, the drive assembly is a ram.

The technical scheme who provides this application brings beneficial effect includes:

according to the sealing device, the first sealing element is arranged between the plugging end and the inner side wall of the through hole, and the rubber material in the die can be prevented from flowing into the through hole along a gap between the plugging end and the inner side wall of the through hole through the sealing effect of the first sealing element, so that the occurrence of a rubber leakage field is further caused; compared with the prior air blowing structure, the air blowing structure is simpler in design, and in addition, the air blowing structure is also provided with a second sealing element and a third sealing element, so that air leakage during vacuumizing or air blowing of the air blowing structure can be prevented; meanwhile, the limiting part is further arranged, the limiting effect of the limiting part can prevent the plugging rod from shifting in the moving process, and the plugging end can plug the port of the through hole close to the inside of the mold.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic view of a plugged end structure of the present invention;

in the figure: 1. a plugging rod; 2. a drive assembly; 3. a gas circuit; 4. an output end; 5. a first through portion; 6. a second through portion; 7. plugging the end; 8. a mold; 9. a first seal member; 10. a groove is embedded; 11. a limiting member; 12. a second seal member; 13. a heat insulation plate; 14. connecting blocks; 15. A third seal.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, fig. 2 and fig. 3, the embodiment provides a high-pressure RTM vacuum-pumping and blowing integrated structure, which includes a plugging rod 1, a driving component 2 for driving the plugging rod 1 to move back and forth linearly, a gas channel 3 dug on a mold 8, and a through hole penetrating through the mold 8. In some embodiments, the plugging rod 1 is a long straight rod, and the driving component 2 is an oil cylinder.

The end face of the output end 4 of the driving assembly 2 is connected with the outer end face of the mold 8 through a bolt. In some embodiments, a heat shield 13 is disposed between the drive assembly 2 and the outer surface of the mold 8. In the process of injection molding of the mold, because the mold 8 can contain the sizing material in a melting state, the temperature of the mold 8 is high, the heat insulation plate 13 can isolate and insulate heat, the over-high temperature of the driving assembly is avoided, and the driving function of the driving assembly is further influenced to a certain degree.

In some embodiments, a connection block 14 is provided between the output end 4 of the driving assembly 2 and the plugging rod 1. An internal threaded hole is dug in one end face of the output end 4, and the connecting block 14 is inserted into the internal threaded hole and is in threaded connection with the output end 4. One end of the plugging rod 1 is fixedly connected with the connecting block 14 in an embedding mode.

The blocking rod 1 is coaxially arranged in the through hole, one end, close to the interior of the mold 8, of the blocking rod 1 is a blocking end 7, and one end, close to the interior of the mold 8, of the through hole is matched with the blocking end 7. In some embodiments, the plugging end 7 is disposed in a circular truncated cone or a truncated pyramid shape, and a smaller bottom surface of two bottom surfaces of the plugging end 7 is disposed near the inside of the mold 8. This facilitates the plugging of the end 7 of the through hole close to the inside of the mold 8. The sealing end 7 with be equipped with first sealing member 9 between the through-hole inside wall, 9 sealing rubber circles in first sealing member. The first sealing element 9 can prevent the glue from permeating into the through hole from the gap, and further prevent the glue leakage. In this embodiment, the plugging end 7 is disposed in a circular truncated cone shape, the diameter of the larger bottom surface is 34mm, the diameter of the smaller bottom surface is 16mm, and the diameter of the rest part of the plugging rod 1 except the plugging end 7 is 25 mm.

In some embodiments, the peripheral wall of the plugging end 7 is hollowed with an embedded groove 10, and the first sealing member 9 is embedded in the embedded groove 10, which describes the connection manner of the first sealing member 9 and the plugging end 7. Because the plugging rod 1 has high matching requirements, the first sealing element 9 is easy to damage, and when the plugging rod is fixed in an embedding mode, the first sealing element 9 is easy to take and place from the embedding groove 10. Preferably, the number of the insertion grooves 10 is more than 1, so that a multiple sealing effect can be achieved.

One end of the through hole, which is close to the inside of the mold 8, is communicated with the inside of the mold 8, one end of the gas circuit 3 is communicated with the through hole, and the other end of the gas circuit 3 is connected with a gas pressure device.

In some embodiments, a limiting member 11 is disposed in the through hole, and the limiting member 11 is sleeved on the blocking rod 1. The limiting part 11 can play a role in limiting the moving direction of the plugging rod 1, and ensures that the plugging rod 1 and the through hole can be coaxially arranged in the moving process, so that the plugging end 7 is precisely plugged, and the gap between the plugging end 7 and the inner side wall of the through hole is reduced. A second sealing element 12 is arranged between the limiting element 11 and the plugging rod 1, and the second sealing element 12 is a sealing rubber ring. The second sealing member 12 can prevent leakage of gas when the gas pressure device supplies or evacuates gas.

In some embodiments, the through hole is stepped and includes a first through portion 5 and a second through portion 6, the first through portion 5 is disposed near the driving assembly 2, and the diameter of the first through portion 5 is larger than that of the second through portion 6. The limiting member 11 is disposed in the first through portion 5. The limiting piece 11 is screwed to the joint surface of the first through portion 5 and the second through portion 6, a third sealing piece 15 is arranged between the joint surface of the first through portion 5 and the second through portion 6 and the limiting piece 11, and the third sealing piece 15 is a sealing rubber ring. The third sealing member 15 can prevent leakage of gas when the gas pressure device supplies or evacuates gas. The gas path 3 is connected to the second through-hole 6.

The working principle is as follows:

the pneumatic equipment inflates or exhausts towards the gas circuit 3, the driving component 2 drives the connecting block 14 to move, and meanwhile, the connecting block 14 drives the plugging piece to linearly move back and forth.

When the mold 8 is closed, the driving assembly 2 drives the plugging piece to retreat, the air pressure equipment exhausts air towards the air passage 3, and when the interior of the mold 8 is exhausted to a set vacuum degree, the driving assembly 2 drives the plugging piece to eject. And injecting glue into the mold 8 by the injection molding machine, wherein the blocking end is provided with a first sealing element, so that the glue cannot flow into the through hole along the gap. After the glue injection and pressure maintaining are completed, the driving assembly 2 drives the plugging member to retreat. And the air pressure equipment blows air to the air path 3, and then the die 8 performs die opening, ejection and piece taking processes.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-pressure RTM vacuumizing and blowing integrated structure is characterized by comprising a plugging rod (1), a driving assembly (2) for driving the plugging rod (1) to linearly move back and forth, a gas path (3) dug on a mold (8) and a through hole penetrating through the mold (8); the end face where the output end of the driving component (2) is located is connected with the outer end face of the mold (8); the blocking rod (1) is coaxially arranged in the through hole, one end, close to the interior of the mold (8), of the blocking rod (1) is a blocking end (7), and one end, close to the interior of the mold (8), of the through hole is matched with the blocking end (7); one end of the through hole, which is close to the interior of the mold (8), is communicated with the interior of the mold (8), and the gas circuit (3) is communicated with the through hole; and a first sealing element (9) is arranged between the plugging end (7) and the inner side wall of the through hole.

2. The high pressure RTM vacuum pumping and blowing integrated structure of claim 1, wherein: the blocking end (7) is arranged in a circular truncated cone or a prismoid shape, and the smaller bottom surface of the two bottom surfaces of the blocking end (7) is arranged close to the inside of the mold (8).

3. The high pressure RTM vacuum pumping and blowing integrated structure of claim 1, wherein: the plug end (7) periphery wall is dug and is equipped with embedded groove (10), first sealing member (9) embedding in embedded groove (10).

4. The high pressure RTM vacuum pumping and blowing integrated structure of claim 3, wherein: the number of the embedded grooves (10) is more than 1.

5. The high pressure RTM vacuum pumping and blowing integrated structure of claim 1, wherein: the through hole is internally provided with a limiting part (11), the limiting part (11) is sleeved on the plugging rod (1), and a second sealing element (12) is arranged between the limiting part (11) and the plugging rod (1).

6. The high pressure RTM vacuum pumping and blowing integrated structure of claim 5, wherein: the through hole is in a step shape and comprises a first through part (5) and a second through part (6), the first through part (5) is arranged close to the driving assembly (2), and the diameter of the first through part (5) is larger than that of the second through part (6); the limiting piece (11) is arranged in the first through part (5); the junction surface of the first through part (5) and the second through part (6) is in threaded connection with a limiting part (11), and a third sealing part (15) is arranged between the junction surface of the first through part (5) and the second through part (6) and the limiting part (11).

7. The high pressure RTM vacuum pumping and blowing integrated structure of claim 6, wherein: the air passage (3) is connected with the second through part (6).

8. The high pressure RTM vacuum pumping and blowing integrated structure of claim 1, wherein: and a heat insulation plate (13) is arranged between the driving component (2) and the outer surface of the mould (8).

9. The high pressure RTM vacuum pumping and blowing integrated structure of claim 1, wherein: output (4) of drive assembly (2) with be equipped with connecting block (14) between shutoff pole (1), output (4) with connecting block (14) spiro union, the one end of shutoff pole (1) with connecting block (14) embedding is connected.

10. The high pressure RTM vacuum pumping and blowing integrated structure of claim 1, wherein: the driving component (2) is an oil cylinder.