CN114769520B - Ejector rod matching mechanism for sand core die - Google Patents
Ejector rod matching mechanism for sand core die Download PDFInfo
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- CN114769520B CN114769520B CN202210465148.7A CN202210465148A CN114769520B CN 114769520 B CN114769520 B CN 114769520B CN 202210465148 A CN202210465148 A CN 202210465148A CN 114769520 B CN114769520 B CN 114769520B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 28
- 239000004576 sand Substances 0.000 claims abstract description 26
- 238000007664 blowing Methods 0.000 claims description 21
- 230000013011 mating Effects 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 abstract description 9
- 238000006073 displacement reaction Methods 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 6
- 238000005266 casting Methods 0.000 description 4
- 238000005498 polishing Methods 0.000 description 3
- 238000005488 sandblasting Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000010485 coping Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003110 molding sand Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C17/00—Moulding machines characterised by the mechanism for separating the pattern from the mould or for turning over the flask or the pattern plate
- B22C17/02—Moulding machines with pin lifting arrangement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/23—Compacting by gas pressure or vacuum
- B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/06—Core boxes
- B22C7/067—Ejector elements
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Casting Devices For Molds (AREA)
Abstract
The application discloses a push rod matching mechanism for a sand core die, wherein a top annular gap between a top push rod and a corresponding top push rod through hole is 0.1mm plus or minus 0.03mm, a bottom annular gap between a bottom push rod and a corresponding bottom push rod through hole is 0.1mm plus or minus 0.03mm, and an air resistance structure is respectively arranged at one end of the top annular gap, which is away from a bottom die holder, and one end of the bottom annular gap, which is away from the top die holder. According to the application, through the cooperation of annular gap high-precision control and the air-resistance structure, exhaust, sand discharge and air resistance can be generated, so that the phenomenon of burrs on the surface of the traditional sand core is eliminated, a large number of burrs are not required to be polished, the labor cost is reduced, and meanwhile, the molding precision of the sand core is ensured. The air resistance cavity machine is simple and convenient to machine and form, and the movable friction fit end design is adopted, so that the ejector rod is smooth in displacement. The sand core die is accurate in alignment, meets the requirement of high-precision concentricity of the ejector rod and the hole site, is accurate in annular gap control, is easy to realize high-precision adjustment in assembly, is high-precision in overall fit clearance control, and is guaranteed in service life.
Description
Technical Field
The application relates to an ejector rod matching mechanism for a sand core die, and belongs to the technical field of precise sand core forming dies.
Background
The mould is a variety of moulds and tools used for injection moulding, blow moulding, extrusion, die casting or forging, smelting, stamping and other methods in industrial production to obtain the required products. In short, a mold is a tool used to make a molded article, which is made up of various parts, with different molds being made up of different parts. The processing of the appearance of the article is realized mainly by changing the physical state of the formed material. The term "industrial master" refers to a tool that, under the action of an external force, makes a blank into a part of a specific shape and size. The method is widely used for blanking, die forging, cold heading, extrusion, powder metallurgy part pressing, pressure casting and the molding processing of compression molding or injection molding of engineering plastics, rubber, ceramics and other products.
In the casting production process, molding of the sand core is involved, the sand core is required to be produced through a sand core mold, and sand injection is performed in a cavity in the sand core mold so as to realize sand core molding.
The sand core mould generally comprises a base, a bottom top plate, a bottom mould base, a top mould base, a sand shooting plate, a blowing plate and a top plate in sequence from bottom to top, wherein a sand core cavity is formed between the bottom mould base and the top mould base, and after the sand core is formed, the ejector rods of the bottom top plate and the top plate are displaced, so that the demolding operation of the sand core is realized.
Under the general condition, be equipped with a plurality of ejector pins on bottom roof and the top roof respectively, the ejector pin can pass the ejector pin through-hole on die holder and the ejector pin die holder and carry out relative displacement, thereby realize the drawing of patterns roof pressure to the psammitolite, when compound die psammitolite sand blasting shaping, the terminal surface of the free end of ejector pin forms the flush with the inner wall of ejector pin through-hole, thereby satisfy profile flatness demand, but, clearance between traditional ejector pin and the ejector pin through-hole is great, generally surpass 0.5mm, can produce the sand blasting shaping structure in this annular space this moment, there is local or complete annular arch promptly, the reaction is the burr on the psammitolite, need the later stage to carry out artifical polishing, psammitolite surface burr distributes densely, the polishing operation is very loaded down with trivial details, the operation intensity is very big.
Disclosure of Invention
The application aims to solve the defects in the prior art, and provides a push rod matching mechanism for a sand core die, aiming at the problem that burrs are difficult to polish due to larger matching gaps of the traditional push rod.
In order to achieve the above purpose, the technical scheme adopted by the application is as follows:
a ejector pin cooperation mechanism for sand core mould, sand core mould includes base, bottom roof, die holder, top die holder, sand shooting plate, blowing plate and the top roof that sets gradually from bottom to top, be equipped with a plurality of bottom ejector pins on the bottom roof, be equipped with a plurality of top ejector pins on the top roof, be equipped with on the die holder with the bottom ejector pin through-hole that bottom ejector pin one-to-one set up, be equipped with on the top die holder with the top ejector pin through-hole that top ejector pin one-to-one set up, sand shooting plate with the blowing plate is equipped with a plurality of top ejector pins respectively and dodges hole, its characterized in that:
the top annular space between the top ejector rod and the corresponding top ejector rod through hole is 0.1mm plus or minus 0.03mm, the bottom annular space between the bottom ejector rod and the corresponding bottom ejector rod through hole is 0.1mm plus or minus 0.03mm,
and one end of the top annular gap, which is away from the bottom die holder, and one end of the bottom annular gap, which is away from the top die holder, are respectively provided with an air resistance structure.
Preferably, the top ejector rod through hole comprises a top through hole bottom annular bulge, a top through hole top annular bulge and a top through hole air resistance cavity positioned between the top through hole bottom annular bulge and the top through hole top annular bulge;
the bottom ejector rod through hole comprises a bottom through hole bottom annular bulge, a bottom through hole top annular bulge and a top through hole air resistance cavity positioned between the bottom through hole bottom annular bulge and the bottom through hole top annular bulge.
Preferably, the free end of the top ejector rod is provided with a top rod pressing end and an ejector rod movable friction fit end for being matched with the annular bulge at the bottom of the top through hole;
the free end of the bottom ejector rod is provided with a bottom rod pressing end and a bottom rod dynamic friction fit end which is used for being matched with the bottom through hole top annular bulge.
Preferably, the movable friction fit end of the ejector rod and the movable friction fit end of the bottom rod are respectively threaded groove sections.
Preferably, the top annular protrusion of the top through hole is detachably arranged on the top die holder, and the bottom annular protrusion of the bottom through hole is detachably arranged on the bottom die holder.
Preferably, the top annular bulge of the top through hole and the bottom annular bulge of the bottom through hole are respectively provided with a sinking groove matched with a limiting ring rib.
Preferably, the base is provided with an alignment guide mechanism for relatively matching the bottom top plate with the bottom die seat,
and a top plate guide mechanism is arranged between the top die seat and the top plate.
Preferably, the top plate guiding mechanism comprises a sand shooting plate aligning part arranged between the top die holder and the sand shooting plate, a blowing plate guiding matching part arranged between the sand shooting plate and the blowing plate, and a top plate guiding matching part arranged between the blowing plate and the top plate.
Preferably, the sand shooting plate is provided with at least three guiding matching pore canals for matching with the top ejector rod; and at least three counterpoint matching pore channels matched with the top ejector rod are arranged on the air blowing plate.
Preferably, the bottom top plate is provided with a plurality of bottom ejector rod loading grooves for loading the bottom ejector rods, the top plate is provided with a plurality of top ejector rod loading grooves for loading the top ejector rods,
the bottom ejector rod loading groove and the top ejector rod loading groove are respectively provided with an adjusting carrier block.
The beneficial effects of the application are mainly as follows:
1. through annular space high accuracy control and air-lock structure matched with, can produce exhaust sand removal air-lock to eliminate traditional sand core surface's burr phenomenon, need not to carry out a large amount of burrs coping, reduced the human cost, ensured sand core shaping precision simultaneously.
2. Meets the molding requirement of the air-lock cavity, has simple and convenient machining and molding of the air-lock cavity, adopts the design of a dynamic friction fit end, ensures smooth displacement of the ejector rod, is not easy to cause the clamping phenomenon during mold separation, and has high efficiency and smoothness in sand core demolding.
3. The sand core die is accurate in alignment, meets the requirement of high-precision concentricity of the ejector rod and the hole site, is accurate in annular gap control, is easy to realize high-precision adjustment in assembly, is high-precision in overall fit clearance control, and is guaranteed in service life.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
fig. 1 is a schematic diagram of the overall structure of a sand core mold according to the present application.
Fig. 2 is a schematic side view of a sand core mold according to the present application.
FIG. 3 is a schematic cross-sectional view of the ejector pin mating mechanism for a sand core mold of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
The application provides a push rod matching mechanism for a sand core mould, which is shown in fig. 1 to 3, wherein the sand core mould comprises a base 1, a bottom top plate 2, a bottom die seat 3, a top die seat 4, a sand shooting plate 5, a blowing plate 6 and a top plate 7 which are sequentially arranged from bottom to top, the bottom top plate 2 is provided with a plurality of bottom push rods 8, the top plate is provided with a plurality of top push rods 9, the bottom die seat 3 is provided with bottom push rod through holes 30 which are arranged in one-to-one correspondence with the bottom push rods, the top die seat 4 is provided with top push rod through holes 40 which are arranged in one-to-one correspondence with the top push rods, and the sand shooting plate and the blowing plate are respectively provided with a plurality of top push rod avoiding holes 10.
Specifically, the sand core mould realizes the stripping jacking through the bottom ejector rod 8 and the top ejector rod 9, but the size precision of the annular gap between the traditional bottom ejector rod 8 and the bottom ejector rod through hole 30 and the annular gap between the top ejector rod 9 and the top ejector rod through hole 40 is generally 0.5mm plus or minus 0.3mm, and the matching precision is realized by the concentricity between the ejector rod and the through hole and the matching size precision, so that the precision of the traditional annular gap is basically 0.2-0.8 mm, the annular gap can generate an exhaust phenomenon in the sand blasting operation process, a large number of irregular burrs can be generated on the sand core, manual deburring operation is required, the operation amount is very large, the operation intensity is high, the polishing amount is difficult to accurately control, the sand core precision is lost, and the forming precision of a rear-end casting piece is affected.
To this case, in this case, top annular space between top ejector pin and the corresponding top ejector pin through-hole is 0.1mm + -0.03 mm, and bottom annular space between bottom ejector pin and the corresponding bottom ejector pin through-hole is 0.1mm + -0.03 mm, and the one end that top annular space was carried away from the die holder and the one end that bottom annular space was carried away from the die holder are equipped with the air-lock structure respectively.
The specific implementation process and principle description:
through the high accuracy size control of top annular gap and bottom annular gap for annular gap control is very even, simultaneously, has adopted the air lock structure, forms the air lock of preventing exhaust in annular gap, and this air lock can prevent effectively that annular gap from advancing sand to satisfy psammitolite surface smoothness demand, its surface is difficult for producing the burr, need not to polish the operation, and the psammitolite precision has ensured the shaping precision of rear end casting, has reduced artifical coping cost simultaneously.
In the scheme, a machining center is adopted to accurately position and punch a top ejector rod through hole and a bottom ejector rod through hole, and then the corresponding air resistance structure is used for avoiding blank reaming on the back side of the positioning and punching, and finally the position degree of the preassembled ejector rod is adjusted, so that the annular clearance fit precision is accurately controlled.
The air resistance structure is generally designed in a mode of an air resistance cavity, belongs to the related prior art of air resistance, and is mainly used for generating the effect of blocking, exhausting and discharging sand when the ejector rod forms a molded surface.
In one embodiment, the air-lock structure is specifically described by:
the top post rod through hole 40 comprises a top through hole bottom annular projection 41, a top through hole top annular projection 42, and a top through hole air resistance cavity 43 positioned between the top through hole bottom annular projection and the top through hole top annular projection.
The bottom post rod through hole 30 comprises a bottom through hole bottom annular protrusion 31, a bottom through hole top annular protrusion 32, and a top through hole air resistance cavity 33 positioned between the bottom through hole bottom annular protrusion and the bottom through hole top annular protrusion.
Specifically, the annular gaps between the top ejector rod and the top through hole bottom annular bulge 41 and the top through hole top annular bulge 42 are 0.1mm plus or minus 0.03mm, and the annular gap between the top ejector rod and the top through hole air resistance cavity 43 is more than 2mm, so that after die assembly, certain air resistance is generated in the top through hole air resistance cavity 43, and the exhaust sand discharge is blocked.
The cooperation of bottom ejector pin is consistent with the cooperation structure of top ejector pin, satisfies the air resistance demand to the abnormal exhaust sand discharge that exists of basic elimination molding sand core produces the burr phenomenon.
In one embodiment, the free end of the top push rod 9 is provided with a top rod push end 91 and a push rod movable friction fit end 92 for matching with the bottom annular bulge of the top through hole; the free end of the bottom push rod 8 is provided with a bottom rod push end 81 and a bottom rod dynamic friction fit end 82 for matching with the bottom through hole top annular bulge.
The top rod friction fit end 92 and the bottom rod friction fit end 82 are threaded groove segments, respectively.
The specific implementation process and principle description:
because the top through hole air lock cavity 43 and the top through hole air lock cavity 33 are designed, air lock can generate certain air lock influence on the displacement of the top ejector rod and the bottom ejector rod, and certain air lock dynamic friction balance damage can be realized through the thread groove section, so that the relative displacement of the top ejector rod and the bottom ejector rod is smoother.
More precisely, the thread groove sections of the top ejector rod and the bottom ejector rod can cover the whole through hole, so that the displacement smoothness is ensured while the air resistance is met.
In one embodiment, the top annular protrusion of the top through hole is detachably arranged on the top die holder, and the bottom annular protrusion of the bottom through hole is detachably arranged on the bottom die holder. The top annular bulge of the top through hole and the bottom annular bulge of the bottom through hole are respectively provided with a sinking groove matched with a limiting ring rib.
Specifically speaking, through the detachable joining in marriage of protruding formula of ring, satisfy the cooperation shaping demand in air-lock chamber, simultaneously, adopted the design of the spacing ring rib of heavy groove cooperation, satisfied each protruding spacing displacement precision and the reliability of carrying on of ring, can not produce the separation influence to the die simultaneously, the air-lock chamber shaping is more convenient.
In a specific embodiment, the base is provided with an alignment guide mechanism for relatively matching the bottom top plate with the bottom die base, and a top plate guide mechanism is arranged between the top die base and the top plate.
Specifically, the annular gap requires control accuracy of 0.1mm±0.03mm, so that the alignment concentricity of the control die closing and the top plate guide mechanism is adopted, the die closing accuracy of the sand core die is generally controlled to be about 0.1mm, the die closing accuracy in the scheme needs to be controlled to be about 0.03mm, the high-accuracy adjustment of the guide mechanism belongs to the prior art, and the die closing accuracy is satisfied by a regular maintenance mode.
In one embodiment, the top plate guiding mechanism comprises a shooting plate alignment part arranged between the top die holder and the shooting plate, a blowing plate guiding matching part arranged between the shooting plate and the blowing plate, and a top plate guiding matching part arranged between the blowing plate and the top plate. At least three guide matching pore canals for matching with the top ejector rod are arranged on the sand shooting plate; the blowing plate is provided with at least three counterpoint cooperation pore canals which are used for being matched with the top ejector rod.
Specifically speaking, in the traditional sand core mould, the unified alignment direction between die holder, sand shooting plate, the air blowing plate is realized to the direction of general adoption top ejector pin, and in this case, sand shooting plate alignment portion, air blowing plate direction cooperation portion, roof direction cooperation portion realize the direction cooperation of one-to-one respectively, and the whole direction is realized to the unified alignment of rethread top ejector pin, and whole direction cooperatees with the local corresponding direction, satisfies the alignment concentricity demand of top ejector pin, easily realizes high accuracy annular gap control.
In a specific embodiment, a plurality of bottom ejector rod loading grooves for carrying the bottom ejector rods are formed in the bottom top plate, a plurality of top ejector rod loading grooves for carrying the top ejector rods are formed in the top plate, and adjusting carrier blocks 100 are respectively arranged in the bottom ejector rod loading grooves and the top ejector rod loading grooves.
In the concentricity adjusting process of the top ejector rod and the bottom ejector rod, high-precision carrying and debugging are realized through the adjusting carrier block 100, the adjusting carrier block 100 can realize model changing, and meeting adjustment is performed according to the position degree and deviation of the ejector rods, so that the annular gap high-precision control requirement is realized.
According to the ejector rod matching mechanism for the sand core die, disclosed by the application, the ejector rod matching mechanism is matched with the air resistance structure through annular gap high-precision control, and the exhaust sand discharge air resistance can be generated, so that the phenomenon of burrs on the surface of a traditional sand core is eliminated, a large number of burrs are not required to be polished, the labor cost is reduced, and meanwhile, the molding precision of the sand core is ensured. Meets the molding requirement of the air-lock cavity, has simple and convenient machining and molding of the air-lock cavity, adopts the design of a dynamic friction fit end, ensures smooth displacement of the ejector rod, is not easy to cause the clamping phenomenon during mold separation, and has high efficiency and smoothness in sand core demolding. The sand core die is accurate in alignment, meets the requirement of high-precision concentricity of the ejector rod and the hole site, is accurate in annular gap control, is easy to realize high-precision adjustment in assembly, is high-precision in overall fit clearance control, and is guaranteed in service life.
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/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/apparatus.
Thus far, the technical solution of the present application has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present application is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present application, and such modifications and substitutions will fall within the scope of the present application.
Claims (7)
1. A ejector pin cooperation mechanism for sand core mould, sand core mould includes base, bottom roof, die holder, top die holder, sand shooting plate, blowing plate and the top roof that sets gradually from bottom to top, be equipped with a plurality of bottom ejector pins on the bottom roof, be equipped with a plurality of top ejector pins on the top roof, be equipped with on the die holder with the bottom ejector pin through-hole that bottom ejector pin one-to-one set up, be equipped with on the top die holder with the top ejector pin through-hole that top ejector pin one-to-one set up, sand shooting plate with the blowing plate is equipped with a plurality of top ejector pins respectively and dodges hole, its characterized in that:
the top annular space between the top ejector rod and the corresponding top ejector rod through hole is 0.1mm plus or minus 0.03mm, the bottom annular space between the bottom ejector rod and the corresponding bottom ejector rod through hole is 0.1mm plus or minus 0.03mm,
one end of the top annular gap, which is away from the bottom die holder, and one end of the bottom annular gap, which is away from the top die holder, are respectively provided with an air resistance structure;
the top ejector rod through hole comprises a top through hole bottom annular bulge, a top through hole top annular bulge and a top through hole air resistance cavity positioned between the top through hole bottom annular bulge and the top through hole top annular bulge;
the bottom ejector rod through hole comprises a bottom through hole bottom annular bulge, a bottom through hole top annular bulge and a top through hole air resistance cavity positioned between the bottom through hole bottom annular bulge and the bottom through hole top annular bulge;
the free end of the top ejector rod is provided with a top rod pressing end and an ejector rod movable friction fit end which is used for being matched with the annular bulge at the bottom of the top through hole;
the free end of the bottom ejector rod is provided with a bottom rod pressing end and a bottom rod dynamic friction fit end which is used for being matched with the bottom through hole top annular bulge;
the movable friction fit end of the ejector rod and the movable friction fit end of the bottom rod are respectively threaded groove sections.
2. The ejector pin mating mechanism for a sand core mold of claim 1, wherein:
the top through hole top annular bulge is detachably arranged on the top die holder, and the bottom through hole bottom annular bulge is detachably arranged on the bottom die holder.
3. The ejector pin mating mechanism for a sand core mold of claim 2, wherein:
the top annular bulge of the top through hole and the bottom annular bulge of the bottom through hole are respectively provided with a sinking groove matched with a limiting ring rib.
4. The ejector pin mating mechanism for a sand core mold of claim 1, wherein:
the base is provided with an alignment guide mechanism for the relative alignment matching of the bottom top plate and the bottom die seat,
and a top plate guide mechanism is arranged between the top die seat and the top plate.
5. The ejector pin mating mechanism for a sand core mold of claim 4, wherein:
the top plate guiding mechanism comprises a sand shooting plate alignment part arranged between the top die holder and the sand shooting plate, a blowing plate guiding matching part arranged between the sand shooting plate and the blowing plate, and a top plate guiding matching part arranged between the blowing plate and the top plate.
6. The ejector pin mating mechanism for a sand core mold of claim 5, wherein:
at least three guide matching pore canals for matching with the top ejector rod are arranged on the sand shooting plate; and at least three counterpoint matching pore channels matched with the top ejector rod are arranged on the air blowing plate.
7. The ejector pin matching mechanism for a sand core die according to any one of claims 1 to 6, characterized in that:
the bottom top plate is provided with a plurality of bottom ejector rod loading grooves for carrying the bottom ejector rods, the top plate is provided with a plurality of top ejector rod loading grooves for carrying the top ejector rods, and the bottom ejector rod loading grooves and the top ejector rod loading grooves are respectively provided with an adjusting loading block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210465148.7A CN114769520B (en) | 2022-04-29 | 2022-04-29 | Ejector rod matching mechanism for sand core die |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210465148.7A CN114769520B (en) | 2022-04-29 | 2022-04-29 | Ejector rod matching mechanism for sand core die |
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| Publication Number | Publication Date |
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| CN114769520A CN114769520A (en) | 2022-07-22 |
| CN114769520B true CN114769520B (en) | 2023-11-07 |
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| CN110871261A (en) * | 2018-09-03 | 2020-03-10 | 十堰阳迪模具有限公司 | Air flue sand core mold process for automobile engine cylinder cover |
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| CN212144412U (en) * | 2020-05-11 | 2020-12-15 | 大连远景铸造有限公司 | Sand core is with spouting supplementary exhaust apparatus of sand mould |
| CN212577444U (en) * | 2020-06-17 | 2021-02-23 | 江苏克劳波尔科技有限公司 | Sand core mold material returning device |
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