Manual pouring mold mechanism

Abstract

The utility model relates to the field of casting, and discloses a manual casting mold mechanism which comprises a box body, the box body comprises a casting cavity used for containing a sand core, the casting cavity is rectangular, the two sides of the casting cavity are long-edge cavity walls, the other two sides of the casting cavity are short-edge cavity walls, exhaust cavities used for exhausting gas are arranged outside the short-edge cavity walls on the two sides of the casting cavity, and the exhaust cavities are communicated with the box body. An air groove used for communicating the pouring cavity with the exhaust cavity is formed in the short-edge cavity wall, and a baffle assembly used for blocking the air groove is arranged in the exhaust cavity; the technical problem that in the prior art, slag holes are likely to exist in a casting due to manual pouring of a mold is solved.

Description

Technical Field

[0001] The utility model relates to the field of casting, in particular to a manual pouring mold mechanism. Background Art

[0002] Manual sand casting is a traditional casting process. The specific method is to use molding sand to form the shape of the casting in the mold, inject the molten metal into the sand mold through the pouring system, and the metal liquid cools and solidifies into a casting in the sand mold. After the casting solidifies, the sand mold is removed and the sand and residue attached to the surface of the casting are cleaned. It has the advantages of low cost, high production efficiency and strong applicability.

[0003] However, in the actual production process, the sand core generates gas due to heat. These gases mainly come from the residual moisture in the sand core, the volatilization and decomposition of adhesives and resins. If these gases cannot be discharged in time, they will gather and expand. When the pressure of the gathered gas in the cavity reaches the sum of the surface tension of the molten metal and the static pressure of the molten metal, and the casting is in the coexistence of solid and liquid phases, these gases will invade the aluminum liquid and form invasive slag holes, such as penetrating pores, subcutaneous pores and pinholes, which reduce the quality of the finished product. This makes the manual sand casting process complicated and requires high operating skills. Utility Model Content

[0004] The utility model aims to provide a manual pouring mold mechanism to solve the technical problem that the manual pouring mold in the prior art easily causes slag holes in the casting.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a manual pouring mold mechanism, including a box body, the box body including a pouring cavity for accommodating a sand core, the pouring cavity is rectangular, the two sides of the pouring cavity are long side cavity walls, and the other two sides are short side cavity walls, exhaust cavities for exhausting gas are provided outside the short side cavity walls on both sides of the pouring cavity, an air groove for connecting the pouring cavity and the exhaust cavity is provided on the short side cavity wall, and a baffle assembly for blocking the air groove is provided in the exhaust cavity.

[0006] The principle and advantages of this solution are as follows: in actual application, before pouring, when the sand core is filled in the pouring cavity to mold the molding sand, the baffle assembly is located in the exhaust cavity to block the air groove, so that the pouring cavity is in a complete cavity, and the molding sand is prevented from overflowing from the air groove; when the molten metal is poured into the open sand core, the baffle assembly is still located in the exhaust cavity to block the air groove, providing support for both sides of the sand core, and preventing the molten metal and high-temperature gas from impacting and deforming the sand core; when the pouring is completed and there is no risk of the molten metal in the sand core escaping, the baffle assembly is removed from the exhaust cavity to accelerate the exhaust and cooling of the sand core;

[0007] Exhaust cavities are set outside the short side walls of the casting cavity, which provide an escape path for the gas. When the sand core is heated to generate gas, the gas can enter the exhaust cavity along the set path instead of gathering disorderly in the casting cavity; the quality and yield of the casting are improved; the design of the exhaust cavity and baffle assembly reduces the direct impact and damage to the mold during the casting process, thereby extending the service life of the mold and effectively solving the technical problem of slag holes easily generated inside the casting during manual sand casting.

[0008] As an improvement, the manual casting mold mechanism further comprises a cover body, which covers the casting cavity, and is provided with a casting port for the metal solution to flow in, and the casting port is larger than the opening of the sand core.

[0009] The beneficial effects of this improvement are: the cover body is closed on the pouring cavity to compact the sand core, ensuring the tightness of the sand core during the pouring process, effectively preventing the molten metal from being deformed by impact above the sand core during the pouring process, and improving the safety of production; the pouring port is designed to be larger than the opening of the sand core, so that the molten metal can flow smoothly and quickly into the pouring cavity, and some gas can be discharged from the top.

[0010] As an improvement, the inner wall of the casting cavity is provided with inwardly protruding corrugations along the circumferential direction.

[0011] The beneficial effect of this improvement is that the wavy design can increase the surface area of ​​the pouring cavity, reduce the adhesion between the inner wall and the filler, and make it easier to shell the sand core as a whole after pouring, which is convenient for cleaning the casting and recovering the molding sand.

[0012] As an improvement, the cover body is in the shape of a rounded rectangle, and the circumferential side wall of the cover body is tangent to the corrugated inner wall of the casting cavity.

[0013] The beneficial effect of this improvement is that a gap is left between the side of the cover and the corrugated valley point of the inner wall of the casting cavity, which can be used to vent the space above the sand core and also facilitate the cover to be smoothly removed from the box body after the casting is completed.

[0014] As an improvement, the baffle assembly includes a first baffle and a second baffle, the first baffle and the second baffle are parallel to the short side cavity wall, the first baffle is close to the short side cavity wall, the first baffle is provided with a hole column for filling the air groove, and a spring in a compressed state is provided between the first baffle and the second baffle.

[0015] The beneficial effects of this improvement are: the design of the hole column fills the air groove, so that the outer surface of the molding sand is smooth when the molding sand is molded, which is convenient for taking it out from the pouring cavity and also avoids the molding sand from clogging the air groove; the spring design between the first baffle plate and the second baffle plate continuously compresses the spring when the first baffle plate approaches the second baffle plate, so that the hole column can be smoothly withdrawn from the air groove, making it easy to pull the baffle assembly out of the exhaust cavity.

[0016] As an improvement, the heights of the first baffle and the second baffle are greater than the depth of the exhaust cavity, and a pull handle is provided on the upper end of the second baffle extending out of the exhaust cavity, and the pull handle is located on the side of the second baffle away from the first baffle, and the pull handle includes a straight segment and an arc segment, and the straight segment is divided into two segments, one end of the two straight segments is fixedly connected to the second baffle, and the two ends of the arc segment are respectively fixedly connected to the other ends of the two straight segments;

[0017] A pull rod is provided on the upper end of the first baffle plate extending out of the exhaust chamber. The pull rod is located on the side of the first baffle plate close to the second baffle plate. The pull rod includes a pulling section and a sliding section. One end of the pulling section is fixedly connected to the midpoint of the sliding section in a T shape, and the other end of the pulling section passes through the second baffle plate and is fixedly connected to the first baffle plate. The sliding section is located between the two straight line sections, and the two ends of the sliding section are respectively slidably connected to the two straight line sections.

[0018] The beneficial effect of this improvement is that the sliding section can slide axially along the straight section, and the sliding section can slide between the arc section and the second baffle. The operator holds the sliding section of the pull rod and moves the sliding section toward the arc section of the pull handle, which makes the first baffle approach the second baffle. The spring between the first baffle and the second baffle is continuously compressed, and the hole column on the first baffle is completely withdrawn from the air groove. The operator keeps the pull rod in its current state and pulls the pull rod and the pull handle to move the baffle assembly upward as a whole until it withdraws from the exhaust cavity, thereby realizing the connection between the casting cavity and the outside world through the air groove. The design of the pull handle and the pull rod allows the operator to easily pull out or insert the baffle assembly into the exhaust cavity.

[0019] As an improvement, a handle is provided on the cover body, and both ends of the handle are symmetrically fixed on the cover body, and the upper end of the handle is inclined away from the pouring port.

[0020] The beneficial effects of this improvement are: when the operator holds the handle to open the cover, the hot air from the pouring port will not rush directly to the handle, avoiding the risk of scalding the operator; and when the metal solution is poured into the open sand core, it will not be affected by the handle.

[0021] As an improvement, both sides of the box body are provided with outwardly extending lifting ears.

[0022] The beneficial effect of this improvement is that it is convenient for operators to carry the entire mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure when the box body and the cover body are in the open state.

[0024] Figure 2 It is a structural schematic diagram when the box body and the cover body are in the closed state. DETAILED DESCRIPTION

[0025] The following is further described in detail through specific implementation methods:

[0026] The figure marks in the drawings of the specification include: box body 1, cover body 2, pouring cavity 3, long side cavity wall 4, short side cavity wall 5, air groove 6, pouring port 7, sand core 8, first baffle 9, second baffle 10, spring 11, exhaust cavity 12, pull handle 13, straight section 14, arc section 15, pull rod 16, pulling section 17, sliding section 18, handle 19 and lifting ear 20.

[0027] Example

[0028] Basically as attached Figure 1 and attached Figure 2 As shown, a manual pouring mold mechanism comprises a box body 1 and a cover body 2, wherein the box body 1 comprises a pouring cavity 3 for accommodating a sand core 8, wherein the pouring cavity 3 is rectangular, and the two sides of the pouring cavity 3 are long side cavity walls 4, and the other two sides are short side cavity walls 5, and exhaust cavities 12 for exhausting gas are arranged outside the short side cavity walls 5 on both sides of the pouring cavity 3, and an air groove 6 for connecting the pouring cavity 3 and the exhaust cavity 12 is arranged on the short side cavity wall 5, and the cover body 2 covers the pouring cavity 3, and a baffle assembly for blocking the air groove 6 is arranged in the exhaust cavity 12.

[0029] The cover 2 is provided with a pouring port 7 for the metal solution to flow in, and the pouring port 7 is larger than the opening of the sand core 8. The area near the opening of the sand core 8 is not covered by the cover 2 and can be used as a channel for gas discharge. The inner wall of the pouring cavity 3 is provided with inwardly protruding corrugations along the circumference, and the protrusions of each corrugation are arranged horizontally, so that the peaks and ridges of the corrugations are vertically distributed.

[0030] The cover 2 is a rounded rectangle, and the circumferential sidewall of the cover 2 is tangent to the corrugated inner wall of the casting cavity 3. When the cover 2 is in the closed state, a gap is left between the side of the cover 2 and the corrugated valley point of the inner wall of the casting cavity 3, which can be used to exhaust the space above the sand core 8.

[0031] The baffle assembly includes a first baffle 9 and a second baffle 10, the first baffle 9 and the second baffle 10 are parallel to the short side cavity wall 5, the first baffle 9 is close to the short side cavity wall 5, the first baffle 9 is provided with a hole column for filling the air groove 6, and a spring 11 in a compressed state is fixedly welded between the first baffle 9 and the second baffle 10. Because the short side cavity wall 5 inside the casting cavity 3 is corrugated, in order to make the inner wall of the casting cavity 3 smooth and easy to demould when the baffle assembly blocks the air groove 6, the length and end face shape of the hole column on the first baffle 9 are suitable for the depth of the air groove 6 and the corrugated surface of the inner wall.

[0032] The height of the first baffle plate 9 and the second baffle plate 10 is greater than the depth of the exhaust cavity 12. A pull handle 13 is provided on the upper end of the second baffle plate 10 extending out of the exhaust cavity 12. The pull handle 13 is located on the side of the second baffle plate 10 away from the first baffle plate 9. The pull handle 13 includes a straight segment 14 and an arc segment 15. The straight segment 14 is divided into two segments. One end of the two straight segments 14 is fixedly welded to the second baffle plate 10, and the two ends of the arc segment 15 are respectively fixedly connected to the other ends of the two straight segments 14.

[0033] A pull rod 16 is provided on the upper end of the first baffle 9 extending out of the exhaust chamber 12. The pull rod 16 is located on the side of the first baffle 9 close to the second baffle 10. The pull rod 16 includes a pulling section 17 and a sliding section 18. One end of the pulling section 17 is fixedly welded to the midpoint of the sliding section 18, so that the pulling section 17 and the sliding section 18 are T-shaped. A through hole is provided on the second baffle 10. The other end of the pulling section 17 passes through the through hole on the second baffle 10 and is fixedly welded to the first baffle 9. The sliding section 18 is located between the two straight sections 14. Sleeves are provided at both ends of the sliding section 18. The sleeves at both ends of the sliding section 18 are respectively sleeved on the two straight sections 14, so that the sliding section 18 is slidably connected to the straight section 14. The sliding section 18 can slide along the axial direction of the straight section 14, and because the end of the straight section 14 is connected to the arc section 15, the sliding section 18 can slide between the arc section 15 and the second baffle 10.

[0034] When the baffle assembly is placed in the exhaust chamber 12, the spring 11 is in a compressed state, so that the spring 11 provides thrust to both sides, so that the first baffle 9 and the second baffle 10 always maintain a tendency to move outward, and the hole column on the first baffle 9 is always inserted in the air groove 6, and a gap is left between the second baffle 10 and the first baffle 9, and the sum of the ultimate compression length of the spring 11 and the length of the hole column is less than the length of the gap; when the baffle assembly needs to be pulled out of the exhaust chamber 12, the operator holds the pull rod 16 The sliding section 18 moves the sliding section 18 toward the arc section 15 of the pull handle 13, which makes the first baffle 9 approach the second baffle 10, and the spring 11 between the first baffle 9 and the second baffle 10 is continuously compressed, and the hole column on the first baffle 9 is completely withdrawn from the air groove 6. The operator maintains the current state of the pull rod 16 and pulls the pull rod 16 and the pull handle 13 to move the baffle assembly upward as a whole until it is withdrawn from the exhaust chamber 12, so that the casting chamber 3 is connected with the outside world through the air groove 6, which is convenient for the rapid exhaust of the sand core 8.

[0035] The first baffle plate 9 and the second baffle plate 10 are higher than the exhaust cavity 12, so that the handle 13 and the pull rod 16 are located outside the exhaust cavity 12, which is convenient for operation. The cover body 2 is provided with a handle, and the two ends of the handle are symmetrically fixed on the cover body 2, and the upper end of the handle is inclined away from the pouring port 7. The two sides of the box body 1 are provided with outwardly extending ears 20. When the operator holds the handle to open the cover body 2, the hot air from the pouring port 7 will not rush directly to the handle, avoiding the risk of scalding the operator; and when the metal solution is poured into the open sand core 8, it will not be affected by the handle.

[0036] The specific implementation process is as follows:

[0037] The baffle assembly is placed in the exhaust cavity 12 to make the inner wall of the pouring cavity 3 intact, and then the feasible variable sand core 8 is filled in the pouring cavity 3 to complete the plasticity of the casting mold, and then the cover body 2 is closed on the sand core 8 to compact the sand core 8, and ensure that the sand core 8 is exposed to the pouring port 7. The metal solution is poured from the open sand core 8 into the hollow space in the sand core 8. After the pouring is completed, the baffle assembly is taken out from the exhaust cavity 12 to accelerate the exhaust and cooling of the sand core 8, so as to enable the mold mechanism to complete the product casting with high efficiency and high quality.

[0038] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A manual pouring mold mechanism, including a box body, characterized in that: The box body includes a casting cavity for accommodating a sand core, the casting cavity is rectangular, the two sides of the casting cavity are long side cavity walls, and the other two sides are short side cavity walls, exhaust cavities for exhausting gas are provided outside the short side cavity walls on both sides of the casting cavity, and an air groove for connecting the casting cavity and the exhaust cavity is provided on the short side cavity wall, and a baffle assembly for blocking the air groove is provided in the exhaust cavity.

2. The manual pouring mold mechanism according to claim 1, characterized in that: The manual casting mold mechanism also includes a cover body, which covers the casting cavity. The cover body is provided with a casting port for the metal solution to flow in, and the casting port is larger than the opening of the sand core.

3. The manual pouring mold mechanism according to claim 2, characterized in that: The inner wall of the casting cavity is provided with inwardly protruding corrugations along the circumferential direction.

4. The manual pouring mold mechanism according to claim 3, characterized in that: The cover body is in a rounded rectangular shape, and the circumferential side wall of the cover body is tangent to the corrugated inner wall of the casting cavity.

5. The manual pouring mold mechanism according to claim 4, characterized in that: The baffle assembly includes a first baffle and a second baffle, the first baffle and the second baffle are parallel to the short side cavity wall, the first baffle is close to the short side cavity wall, the first baffle is provided with a hole column for filling the air groove, and a spring in a compressed state is provided between the first baffle and the second baffle.

6. The manual pouring mold mechanism according to claim 5, characterized in that: The heights of the first baffle and the second baffle are greater than the depth of the exhaust cavity. A pull handle is provided on the upper end of the second baffle extending out of the exhaust cavity. The pull handle is located on the side of the second baffle away from the first baffle. The pull handle includes a straight segment and an arc segment. The straight segment is divided into two segments. One end of the two straight segments is fixedly connected to the second baffle, and the two ends of the arc segment are respectively fixedly connected to the other ends of the two straight segments. A pull rod is provided on the upper end of the first baffle plate extending out of the exhaust chamber. The pull rod is located on the side of the first baffle plate close to the second baffle plate. The pull rod includes a pulling section and a sliding section. One end of the pulling section is fixedly connected to the midpoint of the sliding section in a T shape, and the other end of the pulling section passes through the second baffle plate and is fixedly connected to the first baffle plate. The sliding section is located between the two straight line sections, and the two ends of the sliding section are respectively slidably connected to the two straight line sections.

7. The manual pouring mold mechanism according to claim 6, characterized in that: The cover body is provided with a handle, the two ends of the handle are symmetrically fixed on the cover body, and the upper end of the handle is inclined away from the pouring port.

8. The manual pouring mold mechanism according to claim 7, characterized in that: Both sides of the box body are provided with outwardly extending lifting ears.

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