Sand core mold facilitating demolding

Abstract

The utility model relates to mould technical field, concretely is a sand core mould convenient to demould, including two base plates and respectively setting in fixed mould and movable mould of one side of two base plates still includes a plurality of thimble, and the inside of movable insertion in a base plate and fixed mould, and the protection assembly is arranged in one side of fixed mould, and the protection assembly includes the hollow board, and the inside movable insertion of hollow board has the extension board, and the one side surface of hollow board is fixedly installed with the hollow slide rod, and one side surface fixed mounting of a base plate has the three way electromagnetic valve, and the both ends of three way electromagnetic valve all fixed communication have the air pump. In the utility model, through the hollow board extension, the extension board moves up, and the sand core is blocked from the outside, and the sand core is assisted and supported in the sand core with fixed mould overturning process downward, reduces the adhesion or friction deficiency of sand core and mould cavity wall surface and leads to the sand core early demoulding, reduces the product knock damage caused thereby, improves the stability and reliability of demoulding process.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically a sand core mold that is easy to demold. Background Technology

[0002] Sand cores are crucial components in casting production, used to form internal cavities or complex shapes in castings. Their quality directly determines the dimensional accuracy and internal quality of the casting. Sand cores are typically made by mixing raw sand with a binder, then shooting, compacting, and solidifying the mixture in a specialized mold. Demolding, the process of completely and undamagedly removing the solidified sand core from the core box, is the core link connecting core making with subsequent mold assembly and pouring. Its success or failure has a decisive impact on the efficiency and quality of the entire casting process.

[0003] Existing sand core molds typically use a horizontal installation method during automatic demolding. After the moving mold is removed, the fixed mold is driven by a cylinder to complete the flipping action, placing the formed sand core in a horizontal position. Then, the ejector mechanism moves to push the sand core out of the mold cavity and let it fall onto the tray below. However, when the sand core flips downward with the fixed mold, if its adhesion or friction with the mold cavity wall is insufficient, the sand core is very likely to fall off prematurely under the action of gravity, which can easily lead to product damage due to impact and also affect the stability and reliability of the demolding process. Utility Model Content

[0004] The purpose of this invention is to provide a sand core mold that is easy to demold, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A sand core mold for easy demolding includes two base plates and a fixed mold and a movable mold respectively disposed on one side of the two base plates, and further includes:

[0007] Multiple ejector pins are dynamically interspersed within a base plate and a fixed mold.

[0008] The protective component is located on one side of the fixed mold. The protective component includes a hollow plate with an extension plate movably inserted inside the hollow plate. Hollow slide rods are symmetrically fixedly installed on one side surface of the hollow plate. A three-way solenoid valve is fixedly installed on one side surface of a base plate, and an air pump is fixedly connected to both ends of the three-way solenoid valve.

[0009] Furthermore, a support platform is fixedly installed on the other side surface of a substrate, a top plate is slidably connected inside the support platform, multiple ejector pins are fixedly connected to the top plate, and a cylinder capable of moving the top plate is fixedly installed on one side surface of the support platform.

[0010] Preferably, a rotating shaft is fixedly installed at the lower end of the other side surface of a substrate, and a connecting seat is fixedly installed on one side surface of the support platform.

[0011] Furthermore, a storage groove is provided on one side surface of the fixed mold, a circular groove is symmetrically provided on the inner surface of the storage groove, and a stepped groove is provided on one side of the circular groove on the inner surface of the storage groove.

[0012] Preferably, a spring is fixedly connected inside the circular groove, one end of the spring is fixedly connected to the hollow plate, and a reinforcing rod is fixedly installed on one side surface of the hollow plate inside the spring.

[0013] Preferably, the hollow slide rod is slidably inserted into the stepped groove, and an air tube is slidably inserted inside the hollow slide rod, with the air tube fixedly penetrating the mold.

[0014] Preferably, one end of each of the two air tubes is fixedly connected to a multi-port pipe, and one end of the multi-port pipe is fixedly connected to a three-way solenoid valve. Both air pumps are fixedly mounted on the other side of the substrate via brackets.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] As the moving mold moves away, the spring pushes the hollow plate out of the receiving groove. The sliding limit of the hollow slide rod and the stepped groove restricts the direction and distance of movement of the hollow plate. During demolding, an air pump operates, pumping air into the hollow plate and pushing the extension plate to move up and block the sand core from the outside. As the sand core flips downward with the fixed mold, it provides auxiliary support for the sand core, reducing the sand core from premature detachment due to insufficient adhesion or friction between the sand core and the mold cavity wall, reducing product damage caused by impact, and improving the stability and reliability of the demolding process. After demolding, the three-way solenoid valve switches the circuit, and another air pump operates to suck out the air from inside the hollow plate, causing the extension plate to reset under negative pressure, facilitating the next demolding of the sand core. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the fixed mold and the substrate in this utility model;

[0019] Figure 3 This is a schematic diagram of the disassembled structure of the mold fixing and protective components in this utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the mold and protective components in this utility model;

[0021] Figure 5 This is a cross-sectional structural diagram of the protective component in this utility model.

[0022] In the diagram: 1. Base plate; 101. Fixed mold; 102. Moving mold; 103. Support platform; 104. Top plate; 105. Ejector pin; 106. Circular groove; 107. Stepped groove; 108. Storage groove; 109. Cylinder; 2. Protective components; 201. Hollow plate; 202. Extension plate; 203. Hollow slide bar; 204. Air pipe; 205. Multi-port pipe; 206. Three-way solenoid valve; 207. Air pump; 208. Spring; 209. Reinforcing rod; 3. Rotating shaft; 301. Connecting seat. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 In this embodiment of the present invention, a sand core mold that is easy to demold includes two base plates 1 and a fixed mold 101 and a moving mold 102 respectively disposed on one side of the two base plates 1. It also includes: a plurality of ejector pins 105, which are movably inserted into one base plate 1 and the fixed mold 101; a protective component 2 disposed on one side of the fixed mold 101; the protective component 2 includes a hollow plate 201, an extension plate 202 movably inserted into the hollow plate 201; hollow slide rods 203 are symmetrically fixedly installed on one side surface of the hollow plate 201; a three-way solenoid valve 206 is fixedly installed on one side surface of one base plate 1, and an air pump 207 is fixedly connected to both ends of the three-way solenoid valve 206; a rotating shaft 3 is fixedly installed at the lower end of the other side surface of one base plate 1; and a connecting seat 301 is fixedly installed on one side surface of the support platform 103.

[0025] Specifically, the rotating shaft 3 is rotatably connected to the original equipment, so that the connecting seat 301 is connected to the cylinder of the original equipment, so that the cylinder can drive the fixed mold 101 to flip downward. After the moving mold 102 is removed, the protective component 2 unfolds, the air pump 207 operates, and pushes the extension plate 202 to move upward, blocking one side of the sand core and protecting the sand core.

[0026] Example

[0027] like Figure 2 and Figure 3 As shown, in this embodiment, a support platform 103 is fixedly installed on the other side surface of a substrate 1, a top plate 104 is slidably connected inside the support platform 103, a plurality of ejector pins 105 are fixedly connected to the top plate 104, and a cylinder 109 capable of driving the top plate 104 to move is fixedly installed on one side surface of the support platform 103.

[0028] In this embodiment, the cylinder 109 extends, pushing the top plate 104 to move, causing multiple ejector pins 105 to move synchronously, ejecting the sand core inside the mold cavity for demolding.

[0029] like Figure 1-4 As shown, in this embodiment, a receiving groove 108 is provided on one side surface of the fixed mold 101, and circular grooves 106 are symmetrically provided on the inner side surface of the receiving groove 108. A stepped groove 107 is provided on one side of the circular groove 106 on the inner side surface of the receiving groove 108. A spring 208 is fixedly connected inside the circular groove 106. One end of the spring 208 is fixedly connected to the hollow plate 201, and a reinforcing rod 209 is fixedly installed on one side surface of the hollow plate 201 inside the spring 208. The reinforcing rod 209 restricts the position of the spring 208, so that the spring 208 can be retracted into the circular groove 106.

[0030] In practice, after the moving mold 102 is removed, the spring 208 pushes the hollow plate 201 out of the storage groove 108, so that the extension plate 202 can be moved up to the sand core side for positioning.

[0031] like Figure 4 and Figure 5 As shown, in this embodiment, the hollow slide rod 203 is slidably inserted into the stepped groove 107, and an air pipe 204 is slidably inserted into the hollow slide rod 203. The air pipe 204 is fixedly inserted through the fixed mold 101. One end of the two air pipes 204 is fixedly connected to a multi-port pipe 205, and one end of the multi-port pipe 205 is fixedly connected to a three-way solenoid valve 206. Both air pumps 207 are fixedly installed on the other side surface of the substrate 1 through brackets.

[0032] In practice, the hollow slide bar 203 and the stepped groove 107 limit the movement direction and distance of the hollow plate 201. During demolding, one air pump 207 operates, pumping air into the hollow plate 201 through the air pipe 204 and the hollow slide bar 203, pushing the extension plate 202 upward to block the sand core from the outside. As the sand core flips downward with the fixed mold 101, it provides auxiliary support to the sand core, reducing the sand core from falling off prematurely due to insufficient adhesion or friction between the sand core and the mold cavity wall, reducing product damage caused by collisions, and improving the stability and reliability of the demolding process. After demolding, the three-way solenoid valve 206 switches the passage, and another air pump 207 operates to suck out the air inside the hollow plate 201, causing the extension plate 202 to reset under negative pressure, facilitating the next demolding of the sand core.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sand core mold for easy demolding, comprising two substrates (1) and a fixed mold (101) and a movable mold (102) respectively disposed on one side of the two substrates (1), characterized in that, Also includes: Multiple ejector pins (105) are movably inserted inside a base plate (1) and a fixed mold (101); A protective component (2) is disposed on one side of the fixed mold (101). The protective component (2) includes a hollow plate (201). An extension plate (202) is movably inserted into the hollow plate (201). Hollow slide rods (203) are symmetrically fixedly installed on one side surface of the hollow plate (201). A three-way solenoid valve (206) is fixedly installed on one side surface of the base plate (1). Both ends of the three-way solenoid valve (206) are fixedly connected to an air pump (207).

2. The sand core mold for easy demolding according to claim 1, characterized in that, A support platform (103) is fixedly installed on the other side surface of one of the substrates (1). A top plate (104) is slidably connected inside the support platform (103). A plurality of ejector pins (105) are fixedly connected to the top plate (104). A cylinder (109) capable of driving the top plate (104) to move is fixedly installed on one side surface of the support platform (103).

3. The sand core mold for easy demolding according to claim 2, characterized in that, A rotating shaft (3) is fixedly installed at the lower end of the other side surface of the substrate (1), and a connecting seat (301) is fixedly installed on one side surface of the support platform (103).

4. The sand core mold for easy demolding according to claim 1, characterized in that, The fixed mold (101) has a storage groove (108) on one side surface, and a circular groove (106) is symmetrically provided on the inner surface of the storage groove (108). A stepped groove (107) is provided on one side of the circular groove (106) on the inner surface of the storage groove (108).

5. The sand core mold for easy demolding according to claim 4, characterized in that, A spring (208) is fixedly connected inside the circular groove (106). One end of the spring (208) is fixedly connected to the hollow plate (201). A reinforcing rod (209) is fixedly installed on one side surface of the hollow plate (201) inside the spring (208).

6. The sand core mold for easy demolding according to claim 4, characterized in that, The hollow slide rod (203) is slidably inserted into the stepped groove (107), and an air pipe (204) is slidably inserted inside the hollow slide rod (203). The air pipe (204) is fixedly inserted through the fixed mold (101).

7. The sand core mold for easy demolding according to claim 6, characterized in that, One end of each of the two air tubes (204) is fixedly connected to a multi-port tube (205), and one end of the multi-port tube (205) is fixedly connected to a three-way solenoid valve (206). Both air pumps (207) are fixedly mounted on the other side of the base plate (1) by brackets.

Images