CN216732305U

CN216732305U - Guide vane ceramic core mould

Info

Publication number: CN216732305U
Application number: CN202121123214.XU
Authority: CN
Inventors: 胡阳; 路瑜; 蔡亮
Original assignee: Hunan Qicheng Hualu Aviation Technology Co ltd
Current assignee: Hunan Qicheng Hualu Aviation Technology Co ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2022-06-14
Anticipated expiration: 2031-05-25

Abstract

The utility model provides a guide vane ceramic core mould which comprises an upper mould component, a lower mould component and a guide vane ceramic core mould, wherein the upper mould component comprises a pressing plate, an upper mould plate and an upper mould insert; the lower die assembly comprises a lower die plate and a lower die insert, and a second contour forming the lower part of the ceramic core die cavity is formed on the top of the lower die insert and the top surface of the lower die plate together; the side slide block is provided with a third profile forming the side part of the ceramic core die cavity at one end facing the die cavity; the ejection mechanism comprises a plurality of ejector pins. The first contour of the die cavity is formed by the upper die insert and the upper die plate, the second contour is formed by the lower die insert and the lower die handle, the third contour of the die cavity is formed by one end of the side slide block, and the mode of sequentially demoulding in parts is adopted to match with the top jacking action of the ejector pins, so that the damage to the ceramic core can be reduced, and the demoulding efficiency is improved.

Description

Guide vane ceramic core mould

Technical Field

The utility model relates to the technical field of dies, in particular to a guide vane ceramic core die.

Background

The guide vane is used as an important part in a turbine engine, a core of the guide vane is formed by pressing through a mold, and the conventional mold is difficult to realize the demolding of the core after the core is formed by pressing due to the special structure of the core.

SUMMERY OF THE UTILITY MODEL

The utility model provides a guide vane ceramic core die, which solves the problem of difficult demoulding of a guide vane ceramic core.

The utility model provides a guide vane ceramic core mould, comprising:

the upper die assembly comprises a pressing plate, an upper die plate and an upper die insert, the pressing plate is covered on the top surface of the upper die plate, the upper die insert is arranged in the upper die plate and can slide up and down in the upper die plate, and the top surface of the upper die insert abuts against the bottom surface of the pressing plate; the bottom of the upper mold insert and the bottom of the upper mold plate together form a first contour that forms an upper portion of a ceramic core mold cavity;

the lower die assembly comprises a lower template and a lower die insert, the lower die insert is arranged in the lower template and can slide up and down in the lower template, and a second outline forming the lower part of the ceramic core die cavity is formed on the top of the lower die insert and the top surface of the lower template;

the side slide block is arranged in a cavity arranged between the upper template and the lower template, and one end of the side slide block facing the mold cavity is provided with a third profile forming the side part of the ceramic core mold cavity; the first, second, and third profiles collectively forming a mold cavity of the ceramic core;

the ejection mechanism comprises a plurality of ejector pins, the ejector pins can be arranged in the lower die assembly in a vertically sliding mode, and the ceramic core is ejected out of the die cavity through the ejector pins.

In a possible embodiment, a first limiting bulge is arranged on one side of the upper end of the upper die insert and used for limiting the downward movement of the upper die insert; the middle part of the upper template is provided with a first through groove matched with the upper mold insert, and the top of the through groove is provided with a first limiting groove used for accommodating the first limiting bulge.

In a possible embodiment, a through hole is provided on the pressing plate, and a pull-out screw is connected to the top of the upper mold insert, and a nut portion of the pull-out screw is received in the through hole.

In a possible embodiment, the lower die insert comprises a middle bump, the top of the middle bump is formed with a partial profile on the upper surface of the die cavity, two sides below the middle bump are respectively provided with a side bump, an opening is arranged between the two side bumps, and one side of the bottom of the lower die insert is provided with a second limiting bump; a second through groove matched with the lower die insert is formed in the lower die plate, a second limiting groove is formed in the bottom of the second through groove, and the second limiting bulge is accommodated in the second limiting groove; the side part of the lower template is provided with a sliding groove communicated with the second through groove, a limiting ejector rod is arranged in the sliding groove in a sliding mode, and the limiting ejector rod can extend into the opening to limit the lower die insert to move downwards.

In a possible embodiment, a spring is disposed on the top surface of each of the two side projections, the top of the spring abuts against the step surface in the second limiting groove, a lower stop block for limiting the falling of the lower mold insert is disposed below the lower mold insert, and the lower stop block is disposed in the second limiting groove and above the ejection mechanism.

In a possible embodiment, the side travel block comprises a limiting block and a side stop block arranged in the middle of the side surface of the limiting block, the free end of the side stop block forms a third outline of the die cavity, a cavity arranged between the upper die plate and the lower die plate is matched with the side travel block in shape, and the top of the side stop block can be clamped at the bottom of the upper die plate; when the upper template is removed, the side travel blocks may be withdrawn from the cavities to disengage the side stops from the ceramic core.

In a possible embodiment, the ejection mechanism comprises a bottom plate, base plates arranged on two sides of the bottom plate, an ejection support plate arranged above the base plates, and an ejection plate arranged above the ejection support plate, wherein an eccentric wheel is arranged in a space between the bottom plate and the ejection support plate, the outer contour of the eccentric wheel is in contact with the bottom plate and the ejection support plate, a wheel shaft is arranged on the eccentric wheel, and a plurality of ejector pins are arranged on the ejection plate.

The guide blade ceramic core mould that this embodiment provided, through adopting the first profile of mould insert and cope match-plate pattern synthetic die cavity, make up into the second profile through lower mould insert and lower mould handle, the third profile of die cavity is constituteed to one end through the side position piece, when fashioned ceramic core needs the drawing of patterns, through adopting the form that the subsection divides the drawing of patterns in proper order to ceramic core, the effect of going up the top of cooperation thimble, reducible ceramic core's damage improves drawing of patterns efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a cross-sectional view of a guide vane ceramic core mold provided in accordance with an embodiment of the present invention;

FIG. 2 is a perspective view of a guide vane ceramic core mold removal cope mold assembly in accordance with one embodiment of the present invention;

FIG. 3 is an enlarged view of part A of FIG. 2;

fig. 4 is a perspective view of the guide vane ceramic core mold with the upper mold assembly and the lower mold plate removed according to an embodiment of the present invention.

Description of reference numerals: 1. pressing a plate; 2. mounting a template; 3. an upper die insert; 4. pulling out the screw; 5. a lower template; 6. a lower die insert; 61. a middle bump; 62. a spring; 63. a side projection; 64. an opening; 7. a limit ejector rod; 8. a lower stop block; 9. a side column bit block; 91. a limiting block; 92. a side stop block; 10. a limit screw; 11. ejecting the plate; 12. ejecting a supporting plate; 13. a thimble; 14. a backing plate; 15. a base plate; 16. an eccentric wheel; 17. an axle; 18. a ceramic core; 19. a handle; 20. a side stop block; 21. a guide rod; 22. a side plate; 23. and (4) feeding a material inlet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.

In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Referring to fig. 1 to 4, the present embodiment provides a guide vane ceramic core mold, which includes an upper mold assembly including a pressing plate 1, an upper mold plate 2 and an upper mold insert 3, wherein the pressing plate 1 is disposed on a top surface of the upper mold plate 2, a cavity for clamping the pressing plate 1 is disposed on the top surface of the upper mold plate 2, and the pressing plate 1 covers the upper mold plate 2.

In a possible realization, an upper mold insert 3 is provided in the upper platen 2, which upper mold insert 3 is slidably arranged in the upper platen 2. Specifically, the upper mold insert 3 is configured like a "7", that is, a first limit protrusion is provided on one side of the top of the upper mold insert 3. Correspondingly, a first through groove is formed in the upper die plate 2, a first limiting groove is formed in one side of the top of the first through groove, the first through groove and the first limiting groove are communicated to form a cavity similar to a 7-shaped cavity, the upper die insert 3 is arranged in the cavity, and the first limiting protrusion is arranged in the first limiting groove.

Optionally, the top surface of the upper mold insert 3 abuts against the bottom surface of the pressing plate 1, that is, the upper mold insert 3 is pressed by the pressing plate 1, so that the upper mold insert 3 is prevented from moving upwards; the upper die insert 3 is limited to move downwards through the matching of the first limiting groove and the first limiting bulge.

Referring to fig. 1, in some embodiments, the bottom of the upper mold insert 3 and the bottom of the upper platen 2 together form a first profile that constitutes an upper portion of the ceramic core cavity. That is, the bottom of the upper mold insert 3 forms a portion of the first profile, and the bottom depression of the upper mold plate 2 forms the remaining portion of the first profile, which combine to form the complete first profile.

Alternatively, a through hole is provided at the top of the pressing plate 1, a drawing screw 4 is provided at the top of the upper mold insert 3, and a nut portion of the drawing screw 4 is provided in the through hole. After the pressing plate 1 is taken out upwards, the upper die insert 3 can be pulled out by pulling out the screw 4 by hand.

In one possible implementation, the lower die assembly includes a lower platen 5 and a lower die insert 6. The lower mold insert 6 is disposed within the lower mold plate 5, similar to the upper mold assembly. Specifically, a second through groove is provided in the lower die plate 5, and a second limit groove is provided at the bottom of the second through groove. Referring to fig. 4, the lower mold insert 6 includes a middle protrusion 61, side protrusions 63 are provided at both sides below the middle protrusion 61, the side protrusions 63 form a structure similar to a "convex" type with the middle protrusion 61, and an opening 64 is provided between the side protrusions 63. Optionally, a second limit protrusion is provided at one side of the side protrusion 63. Alternatively, a stopper mandril 7 is slidably arranged on one side of the lower template 5, and correspondingly, a sliding groove for sliding the stopper mandril 7 is arranged on the side surface of the lower template 5 and is communicated with a second stopper groove, and the stopper mandril 7 can slide into the bottom opening 64 of the lower mold insert 6 from the sliding groove to push the lower mold insert 6 to a proper position. Here, the top of the lower mold insert 6 and the top of the lower template 5 together form a second contour constituting the lower part of the ceramic core cavity, that is, the top of the middle protrusion 61 of the lower mold insert 6 constitutes a second contour of a portion, and the top of the lower template 5 is recessed to constitute a second contour of another portion.

Optionally, springs 62 are disposed on the two side projections 63 of the lower mold insert 6, the bottom of the spring 62 is disposed on the top surface of the side projection 63, and the top surface of the spring 62 abuts against the step surface on the second limiting groove. It should be noted that a plurality of step surfaces are arranged in the second limiting groove, some of the step surfaces may abut against the second limiting protrusion to limit the upward movement of the lower die insert 6, and the other step surfaces may abut against the spring 62 to limit the movement of the spring. When the limiting ejector rod 7 is drawn out, the lower die insert 6 automatically falls under the action of the spring force of the spring 62 to realize the separation from the ceramic core. Optionally, a lower stop 8 is further disposed below the lower mold insert 6, the lower stop 8 is used for stopping the lower mold insert 6 from further falling, i.e., controlling the falling stroke, the lower stop 8 is disposed in the second limiting groove, and the bottom of the lower stop 8 is disposed on the ejection mechanism.

In one possible embodiment, the receiving space for the receiving-side index block 9 is delimited jointly between the upper platen 2 and the lower platen 5 at a position on the mold cavity side. The side slide block 9 comprises a limiting block 91 and a side stop block 92 arranged in the middle of the side surface of the limiting block 91, a third profile of a formed die cavity side part is formed at the free end (the end facing the die cavity) of the side stop block 92, the shape of a cavity arranged between the upper die plate 2 and the lower die plate 5 is matched with that of the side slide block 9, and the top of the side stop block 92 can be clamped in a bottom cavity of the upper die plate 2. That is, when the upper mold plate 2 is covered on the lower mold assembly, the side travel block 9 is just clamped in the lower groove of the upper mold plate 2, and the position limitation of the side travel block 9 is realized through the matching of the upper mold plate 2 and the side travel block 9. Optionally, the accommodating cavity between the upper mold plate 2 and the lower mold plate 5 for accommodating the side travel block 9 comprises a first accommodating groove for accommodating the limiting block 91 and a second accommodating groove for accommodating the side block 92, and the side block 92 is slidably disposed in the second accommodating groove. After the upper template 2 is moved out, the side slide block 9 can be drawn out from the second accommodating groove for a certain distance so as to enable the side slide block to fall off the ceramic core, and a limit screw 10 is arranged in the drawing direction to limit the moving distance of the side slide block 9.

In this embodiment, the first profile, the second profile, and the third profile collectively form a cavity for the ceramic core, and demolding is facilitated by partitioning the first profile into a bottom shape for the upper mold insert and a bottom shape for the upper mold plate, and partitioning the second profile into a top shape for the lower mold insert and a top shape for the lower mold plate, i.e., combining the profiles of the cavity with a plurality of profile segments.

In this embodiment, the ceramic core is formed by providing the feed opening 23 in communication with the cavity, i.e., injecting the ceramic core material from the feed opening 23, and filling the cavity with the core material.

Referring to fig. 1, in one possible implementation, an ejection mechanism is arranged below the lower die assembly, the ejection mechanism comprises a bottom plate 15, backing plates 14 arranged on two sides of the bottom plate 15, an ejection support plate 12 arranged above the backing plates 14, and an ejection plate 11 arranged above the ejection support plate 12, an eccentric wheel 16 is arranged in a space between the bottom plate 15 and the ejection support plate 12, the outer contour of the eccentric wheel 16 is in contact with the bottom plate 15 and the ejection support plate 12, a wheel shaft 17 is arranged on the eccentric wheel 16, and a plurality of ejector pins 13 are arranged on the ejection plate 11.

Referring to fig. 2 and 3, the ejector pins 13 include four ejector pins 13 for both sides of the front portion of the upper ceramic core and four ejector pins 13 for the rear portion of the upper ceramic core. The ejector pin 13 is driven to synchronously eject the ceramic core through the rotation of the eccentric wheel 16, so that the ceramic core can be rapidly demoulded.

Optionally, the ejector pin 13 is provided with a large end at the bottom, and accordingly, a cavity for accommodating the large end is provided at the bottom of the ejector plate 11, and the bottom of the large end abuts against the ejector pallet 12.

Optionally, the axle 17 of the eccentric 16 is connected to a handle 19, and the ejection action is achieved by turning the eccentric via the handle 19.

Referring to fig. 4, optionally, side plates 22 are provided on both sides of the ejection mechanism, and a handle for easy grasping by hand is provided between the two side plates 22. Alternatively, a plurality of guide rods 21 are provided on the bottom plate 15, and the side plate 22 is connected to the bottom plate 15 through the guide rods 21. Similarly, the lower template 5 is also positioned above the side plates 22 by the guide rods 21.

Referring to fig. 2 and 4, side stoppers 20 are provided on both sides of the side travel blocks 9, and the side travel blocks 9 are positioned and restricted from moving to both sides by the side stoppers 20, and the side stoppers 20 are positioned on the lower die plate 5 by pins.

For example, when the mold is used specifically, after the mold is assembled, the raw material of the ceramic core 18 is injected into the mold cavity from the injection port, after the ceramic core 18 is shaped in the mold cavity, the pressing plate 1 is removed, the upper mold insert 3 is pulled out, the upper mold plate 2 is removed, the limiting ejector rod 7 is pulled out, the lower mold insert 6 automatically falls under the action of the spring 62, the side traveling block 9 is pulled out, and after the lower mold insert is pulled out, the handle 19 is rotated, and the shaped ceramic core 18 is ejected through the ejector pin, so that the operation is completed.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A guide vane ceramic core mold, comprising:

the upper die assembly comprises a pressing plate, an upper die plate and an upper die insert, wherein the pressing plate is covered on the top surface of the upper die plate, the upper die insert is arranged in the upper die plate, the upper die insert can slide up and down in the upper die plate, and the top surface of the upper die insert is abutted against the bottom surface of the pressing plate; the bottom of the upper mold insert and the bottom of the upper mold plate together form a first contour that forms an upper portion of a ceramic core mold cavity;

the lower die assembly comprises a lower die plate and a lower die insert, the lower die insert is arranged in the lower die plate and can slide up and down in the lower die plate, and a second contour forming the lower part of the ceramic core die cavity is formed on the top of the lower die insert and the top surface of the lower die plate together;

2. The ceramic core mold of claim 1, wherein a first limiting protrusion is provided on one side of an upper end of the upper mold insert, the first limiting protrusion being configured to limit downward movement of the upper mold insert; the middle part of the upper template is provided with a first through groove matched with the upper mold insert, and the top of the through groove is provided with a first limiting groove used for accommodating the first limiting bulge.

3. The ceramic core mold of claim 2, wherein the pressure plate has a through hole formed therein, and wherein a pull-out screw is attached to a top portion of the upper mold insert, a nut portion of the pull-out screw being received in the through hole.

4. The ceramic core mold of claim 1, wherein the lower mold insert comprises a middle protrusion, the top of the middle protrusion forms a partial contour of the upper surface of the mold cavity, a lateral protrusion is respectively arranged on two sides below the middle protrusion, an opening is arranged between the lateral protrusions, and a second limiting protrusion is arranged on one side of the bottom of the lower mold insert; a second through groove matched with the lower die insert is formed in the lower die plate, a second limiting groove is formed in the bottom of the second through groove, and the second limiting bulge is accommodated in the second limiting groove; the side part of the lower template is provided with a sliding groove communicated with the second through groove, a limiting ejector rod is arranged in the sliding groove in a sliding mode, and the limiting ejector rod can extend into the opening to limit the lower die insert to move downwards.

5. The ceramic core mold as claimed in claim 4, wherein a spring is provided on top surfaces of both the side projections, a top portion of the spring abuts against the second stopper groove step surface, a lower stopper for restricting a drop of the lower mold insert is provided below the lower mold insert, and the lower stopper is provided in the second stopper groove and above the ejector mechanism.

6. The ceramic core mold of claim 1, wherein the side slide blocks comprise a limiting block and side stop blocks arranged in the middle of the side surfaces of the limiting block, the free ends of the side stop blocks form a third profile of the mold cavity, a cavity arranged between the upper mold plate and the lower mold plate is matched with the shape of the side slide blocks, and the tops of the side stop blocks can be clamped at the bottom of the upper mold plate; when the upper die plate is removed, the side travel blocks may be withdrawn from the cavities to disengage the side stop blocks from the ceramic core.

7. The ceramic core mold according to claim 1, wherein the ejection mechanism comprises a bottom plate, base plates arranged on two sides of the bottom plate, an ejection support plate arranged above the base plates, and an ejection plate arranged above the ejection support plate, an eccentric wheel is arranged in a space between the bottom plate and the ejection support plate, the outer contour of the eccentric wheel is in contact with the bottom plate and the ejection support plate, a wheel shaft is arranged on the eccentric wheel, and a plurality of ejector pins are arranged on the ejection plate.