Sheet type multi-way valve casting mold

Abstract

The utility model discloses a piece type multi-way valve casting mold, and particularly relates to the technical field of casting molds, the piece type multi-way valve casting mold comprises a core box model, the core box model comprises a core box upper mold and a core box lower mold, a plurality of steel mesh venting plugs and a plurality of ejector rods are fixedly arranged on the core box upper mold and the core box lower mold, and the steel mesh venting plugs and the ejector rods are uniformly distributed. Exhaust gaps are formed between the core box upper die and the ejector rod and between the core box lower die and the ejector rod, and the core box upper die and the core box lower die are detachably fixed together through a plurality of positioning pins. According to the utility model, the plurality of steel mesh venting plugs and the plurality of ejector rods are arranged, and the venting gaps at the ejector rods and the steel mesh venting plugs are utilized, so that air in the core box upper mold cavity and the core box lower mold cavity can be quickly exhausted, and therefore, pressure balance is realized, a precoated sand core is fuller, the surface smoothness is also greatly improved, and the production efficiency is greatly improved from pouring to casting finished products. The inner cavity quality of the casting is improved, and the comprehensive yield of the casting is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to foundry mould technical field more specifically, it is a kind of slice type multiway valve foundry mould. BACKGROUND

[0002] Slice type multiway valve is a kind of hydraulic control element, it can control the action of multiple execution elements (such as hydraulic cylinder, hydraulic motor) in hydraulic system. Its working principle is to change the flow direction, pressure and flow of hydraulic oil by the movement of operating valve core in valve body, to realize the accurate control to execution element. Slice type multiway valve is widely used in agricultural machinery, mainly for satisfying the one-way locking of execution mechanism. In order to ensure the strength of slice type multiway valve, the existing slice type multiway valve generally adopts the production of casting, and the traditional casting process is to divide the middle oil channel sand core into multiple sand cores and adopt hot core box for production, and the outer mould adopts coated sand. The quality of sand core in casting industry depends on whether the core box exhaust and sand shooting are reasonable, because when shooting, compressed air and sand enter the core box together, if the gas in the core box cannot be discharged in time, the compactness of sand core will be greatly affected, causing the rough surface and defect of sand core. The core box exhaust is mainly through exhaust groove and exhaust plug, the exhaust plug is generally arranged on the core surface, and the gap is between 0.1-0.3mm, and the exhaust plug exhaust is arranged in the deep recess of core box, such as positioning core head and water outlet hole of water jacket sand core, and the specification of exhaust plug is 6-12mm, and through experiment, it is found that steel mesh exhaust plug is better than strip type exhaust plug, and the exhaust effect is better.

[0003] For example, the prior art with publication number CN216680093U discloses a slice type multiway valve foundry mould, the utility model adopts clay sand compaction mould, not only greatly improves the strength and rigidity of mould, can well avoid the deformation and shrinkage caused by molten iron shrinkage and graphite expansion in solidification process, and compared with resin sand molding, has the advantages of low cost, safety and environmental protection; adopting coated sand core can utilize the good collapsibility of coated sand, ensure the precision of valve body flow channel and surface finish, and make the internal flow channel of casting easy to clean sand.

[0004] However, the above-mentioned prior art has the following problems when in use: the traditional slice type multiway valve foundry mould is shot in sand, and the coated sand is filled into the mould cavity under the blowing of compressed air, because the compressed air can blow the coated sand to flow, so the compactness of the sand core formed subsequently will be greatly affected, and the existing mould generally has poor exhaust effect, which can easily cause the rough surface and defects of sand core, based on this, the utility model provides a slice type multiway valve foundry mould which can quickly exhaust and improve the yield of products. UTILITY MODEL CONTENTS

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a piece type multi -way valve casting mould, through setting up a plurality of steel mesh exhaust plug and a plurality of ejector pins, utilize the exhaust gap and steel mesh exhaust plug at the ejector pin, can make the air in the upper model cavity of core box and the lower model cavity of core box is rapidly discharged, to this realizes pressure balance, the core sand after coating is more full, surface finish has also greatly improved, from pouring to casting finished product, improve the quality of the inner cavity of casting, improve the comprehensive good product rate of casting, to solve the problem in the above background art.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a piece type multi -way valve casting mould, including core box model, the core box model includes core box upper die and core box lower die, the core box upper die and core box lower die all are fixed with a plurality of steel mesh exhaust plug and a plurality of ejector pins, a plurality of steel mesh exhaust plug and a plurality of ejector pins are evenly distributed, for improving the exhaust efficiency, the core box upper die and the ejector pin between, the core box lower die and the ejector pin between all are equipped with exhaust gap, the core box upper die and the core box lower die are detachably fixed together through a plurality of positioning pins, the core box upper die top and the core box lower die bottom all are equipped with gas delivery assembly, the gas delivery assembly includes two jet port plate.

[0007] In a preferred embodiment, the core box upper die top and the core box lower die bottom are provided with a plurality of horn-shaped core box jets, and the two jet port plates are provided with horn-shaped jets corresponding to the horn-shaped core box jets on the side close to each other, for injecting compressed air and coated sand into the core box upper model cavity and the core box lower model cavity through the horn-shaped jets and the horn-shaped core box jets.

[0008] In a preferred embodiment, a high-temperature-resistant sealing ring is fixedly arranged in each horn-shaped jet, for improving the sealing performance between the horn-shaped jets and the horn-shaped core box jets.

[0009] In a preferred embodiment, the side of the two jet port plates away from each other is detachably connected with a pneumatic cylinder, for driving the two jet port plates to close the core box upper die and the core box lower die.

[0010] In a preferred embodiment, the exhaust gap has a height of 0.1mm, for rapidly discharging the air in the mold cavity, while preventing the coated sand from flowing out of the exhaust gap.

[0011] In a preferred embodiment, the plurality of steel mesh exhaust plugs on the core box upper die are linearly arranged on the core box upper die, and the plurality of steel mesh exhaust plugs on the core box lower die are linearly arranged on the core box lower die, so that the design of the plurality of steel mesh exhaust plugs can greatly improve the exhaust speed, thereby improving the product yield rate after the coated sand is formed.

[0012] The utility model discloses the technical effect and advantage:

[0013] The utility model discloses a plurality of steel mesh exhaust plug and a plurality of ejector rod are set, utilize the exhaust gap and steel mesh exhaust plug at the ejector rod place, can make the air in the model cavity of core box upper mould and core box lower mould fast exhaust, thereby realize pressure balance, the core of coated sand is more full after, and the surface finish has also improved greatly, from pouring to casting finished product, improve the quality of the inner chamber of casting, improve the comprehensive good product rate of casting. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the whole structure schematic diagram of the utility model;

[0015] Figure 2 It is the view of the utility model's nozzle plate;

[0016] Figure 3 It is Figure 2 The enlarged view of A part in;

[0017] Figure 4 It is the ejector rod schematic diagram of the utility model.

[0018] The figure mark is: 1, core box model;2, steel mesh exhaust plug;3, ejector rod;4, exhaust gap;5, positioning pin;6, gas transmission subassembly;7, horn-like core box nozzle;8, high-temperature-resistant sealing ring;9, air cylinder;

[0019] Core box upper mould;102, core box lower mould;

[0020] 601, nozzle plate;602, horn-like nozzle. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0022] Refer to the drawings in the description Figures 1-4The utility model provides a kind of piece type multiway valve casting mould, including core box model 1, the core box model 1 includes core box upper die 101 and core box lower die 102, multiple steel mesh exhaust plugs 2 and multiple ejector rods 3 are fixedly equipped on the core box upper die 101 and core box lower die 102, multiple steel mesh exhaust plugs 2 and multiple ejector rods 3 are evenly distributed, for improving exhaust efficiency, and multiple steel mesh exhaust plugs 2 on the core box upper die 101 are linear array distribution on core box upper die 101, multiple steel mesh exhaust plugs 2 on the core box lower die 102 are linear array distribution on core box lower die 102, the design of multiple steel mesh exhaust plugs 2 can greatly improve exhaust speed, to be able to improve the yield of product after coated sand forming in turn;

[0023] The core box upper die 101 and the ejector rod 3 between, the core box lower die 102 and the ejector rod 3 between are equipped with exhaust gap 4, and the exhaust gap 4 height is 0.1mm, for the air in cavity is discharged quickly, while avoiding coated sand from exhaust gap 4, the core box upper die 101 and the core box lower die 102 between by multiple positioning pins 5 can be detachably fixed together;

[0024] Then, gas delivery assembly 6 is equipped above core box upper die 101 and below core box lower die 102, the gas delivery assembly 6 includes two jet port plates 601, and, multiple horn-like core box jets 7 are set in the top of core box upper die 101 and the bottom of core box lower die 102, the side close to two jet port plates 601 is equipped with horn-like jet 602 same in number with horn-like core box jet 7, multiple horn-like jets 602 and multiple horn-like core box jets 7 are one-to-one correspondence, for compressed air and coated sand are injected into the cavity of core box upper die 101 and the cavity of core box lower die 102 from horn-like jet 602 and horn-like core box jet 7;

[0025] The side away from two jet port plates 601 can be detachably connected with air cylinder 9, for driving two jet port plates 601 and core box upper die 101 and core box lower die 102 close.

[0026] In use, two nozzle plates 601 are combined with the core box upper die 101 and the core box lower die 102 under the driving action of the cylinder 9, at this time, the plurality of horn-shaped nozzles 602 on the two nozzle plates 601 are respectively aligned with the plurality of horn-shaped core box nozzles 7 on the core box upper die 101 and the core box lower die 102, forming a mouth-to-mouth, the horn-shaped nozzles 602 and the horn-shaped core box nozzles 7 can ensure that the sand is collected before entering the cavity when shooting, ensuring the shooting pressure, improving the shooting capacity, and such horn-shaped nozzles 602 and horn-shaped core box nozzles 7 are easy to remove when repairing the core, improving the core repairing efficiency, the core box upper die 101 and the core box lower die 102 are closed through the plurality of positioning pins 5, then the coated sand in the two nozzle plates 601 can be shot into the core box upper die 101 cavity and the core box lower die 102 cavity through compressed air, the excess air is discharged from the plurality of steel mesh exhaust plugs 2 and the plurality of exhaust gaps 4 in time, so that the coated sand in the cavity is full of the cavity, which can solve the problem of incomplete shooting of multi-piece multi-way valve sand core, and then the yield can be improved.

[0027] A high-temperature-resistant sealing ring 8 is fixed in each horn-shaped nozzle 602, the high-temperature-resistant sealing ring 8 is used as the sealing of the horn-shaped nozzle 602 and the horn-shaped core box nozzle 7, which solves the problem of air leakage during sand shooting, ensures the concentration of sand shooting pressure, reduces energy consumption, saves the waste of coated sand, improves the yield of core making, and reduces the cost.

[0028] Finally, the above only describes preferred embodiments of the present application and is not intended to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A casting mold for a plate-type multi-way valve, characterized in that: The application relates to a core box model (1) which comprises a core box upper die (101) and a core box lower die (102), a plurality of steel mesh exhaust plugs (2) and a plurality of ejector rods (3) are fixedly arranged on the core box upper die (101) and the core box lower die (102), the plurality of steel mesh exhaust plugs (2) and the plurality of ejector rods (3) are uniformly distributed, and an exhaust gap (4) is arranged between the core box upper die (101) and the ejector rod (3) and between the core box lower die (102) and the ejector rod (3). The core box upper die (101) and the core box lower die (102) are detachably fixed together through a plurality of positioning pins (5), a gas conveying assembly (6) is arranged above the core box upper die (101) and below the core box lower die (102), and the gas conveying assembly (6) comprises two nozzle plates (601).

2. A cast molding tool for a cartridge valve according to claim 1, wherein: A plurality of horn-shaped core box nozzles (7) are arranged at the top of the core box upper die (101) and the bottom of the core box lower die (102), horn-shaped nozzles (602) which are same in number with the horn-shaped core box nozzles (7) are arranged on the side of the two nozzle plates (601) which are close to each other, and the plurality of horn-shaped nozzles (602) and the plurality of horn-shaped core box nozzles (7) are in one-to-one correspondence.

3. A cast molding tool for a cartridge valve according to claim 2, wherein: A high-temperature-resistant sealing ring (8) is fixedly arranged in each horn-shaped nozzle (602) for improving the sealing performance between the horn-shaped nozzle (602) and the horn-shaped core box nozzle (7).

4. The cast molding tool for a cartridge valve according to claim 1, wherein: The side of the two nozzle plates (601) which are away from each other is detachably connected with a gas cylinder (9) for driving the two nozzle plates (601) to be closed with the core box upper die (101) and the core box lower die (102).

5. The cast molding tool for a cartridge valve according to claim 1, wherein: The height of the exhaust gap (4) is 0.1mm.

6. A cast molding for a cartridge valve according to claim 1, wherein: The plurality of steel mesh exhaust plugs (2) on the core box upper die (101) are linearly arranged on the core box upper die (101), and the plurality of steel mesh exhaust plugs (2) on the core box lower die (102) are linearly arranged on the core box lower die (102).

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