Embedded nozzle structure of sand core mold

Abstract

The utility model relates to the technical field of sand core molds, in particular to an embedded nozzle structure of a sand core mold, which comprises a sand shooting plate, an upper mold and a lower mold, and a plurality of groups of vertically downward sand shooting channels are arranged on the sand shooting plate; shooting nozzles are arranged at the end parts of the sand shooting channels; the upper die and the lower die are combined to form a complete die; external equipment drives the sand shooting plate to move downwards, so that the sand shooting plate gradually moves towards the mold which is combined into a whole; a plurality of matching holes are preset in the upper die; the sand shooting channel is inserted into the matching hole of the upper mold, the precoated sand in the sand barrel is shot into the sand mold cavity through the sand shooting channel and the shooting nozzle under the action of compressed air to complete sand core filling, and the water channel sand core is formed after curing. According to the utility model, the existing sand shooting plate is improved, and the sand shooting channels are additionally arranged, so that the sand shooting channels can penetrate into the matching holes of the upper die to carry out sand blasting; and the length of the formed sand shooting column is within 10mm, so that the filling capacity of molding sand is improved, and meanwhile, the problem that the water channel sand core is fractured when being ejected due to too high residual sand shooting column is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sand core moulds, in particular to an embedded nozzle structure of a sand core mould. Background Art

[0002] New energy integrated products have complex structures, heavy weights, increased difficulty in casting technology, and relatively complex casting process design.

[0003] Take the waterway sand core as an example. It is small and has a complex shape and structure. Since the diameter of the waterway sand core is generally between Φ6 and φ10 mm, the sand core is conventionally designed when shooting sand, such as Figure 1 As shown in the figure, after the upper and lower molds are closed, the sand shooting plate drives the nozzle to move downward. After reaching the specified position, the nozzle is flush with the upper mold plane, which causes the sand shooting column of the water channel core to be very thin and long in the upper mold body, with an effective length of more than 95mm. And when shooting the core, because the nozzle is far away from the sand core body and the diameter of the nozzle is small, the water channel sand core is very easy to be undershot during the production process, resulting in a lack of meat defect and scrap.

[0004] At the same time, the water channel sand core is demoulded by ejecting the sand column through the ejector rod in the upper mold. Since the sand column shot from the water channel core is very thin and long in the upper mold body, it is very easy to break the sand column when the ejector rod ejects the sand column, and the sand column is easy to get stuck in the upper mold channel, which leads to frequent and difficult cleaning, resulting in a sand core scrap rate of more than 30%, and the sand core scrap rate remains high.

[0005] Due to the above reasons, the core-making cycle is extended to 130s, seriously affecting the improvement of production efficiency. In addition, the residual length of the sand-shooting column is more than 95mm. When the sand-shooting column is ejected, more than 20% of the sand-shooting column is stuck and remains in the mold. The operator needs to manually clean the remaining stuck sand-shooting column, which increases the frequency of contact between the operator and the mold when cleaning the mold, and increases the risk of burns. Utility Model Content

[0006] The utility model aims to solve the problems existing in the background technology and proposes a sand core mold embedded nozzle structure. By improving the existing sand shooting plate and adding a sand shooting channel, the sand shooting channel can penetrate into the matching hole of the upper mold for sand blasting. The length of the formed sand shooting column is within 10mm, thereby improving the filling capacity of the molding sand and solving the problem of breakage of the water channel sand core when it is ejected due to the excessively high residual sand shooting column.

[0007] The technical solution of the utility model is a sand core mold embedded nozzle structure, comprising a sand shooting plate, an upper mold and a lower mold, wherein a plurality of groups of vertical downward sand shooting channels are arranged on the sand shooting plate; nozzles are arranged at the ends of the sand shooting channels;

[0008] The upper die and the lower die are combined to form a complete mold;

[0009] The external device drives the sandblasting plate to move downward, so that it gradually moves toward the mold that is integrated into a whole;

[0010] A plurality of matching holes are preset on the upper die;

[0011] The sand shooting channel is inserted into the matching hole of the upper mold. Under the action of compressed air, the coated sand in the sand bucket is shot into the sand mold cavity through the sand shooting channel and the nozzle to complete the sand core filling, and forms a waterway sand core after solidification.

[0012] Preferably, each sand-shooting channel corresponds to only one matching hole.

[0013] Preferably, the sand shooting channel is a cylindrical structure, and a channel for the movement of molding sand is formed inside the cylindrical structure; the nozzle is installed at the bottom of the channel.

[0014] Preferably, the upper die and the lower die are positioned and installed via guide pillars.

[0015] Preferably, two ends of the sandblasting plate are provided with vertically downward positioning pieces, and the positioning pieces cooperate with the positioning holes on the lower die for positioning.

[0016] Preferably, after the nozzle is inserted into the matching hole of the upper mold, the distance between the nozzle and the cavity is less than 10 mm.

[0017] Compared with the prior art, the utility model has the following beneficial technical effects:

[0018] The utility model improves the existing sand blasting plate and increases the sand blasting channel, so that the sand blasting channel can penetrate into the matching hole of the upper mold for sand blasting; the length of the formed sand blasting column is within 10mm, thereby improving the filling capacity of the molding sand and solving the problem of the breakage of the water channel sand core when it is ejected due to the excessively high residual sand blasting column, so that the quality waste of the sand core caused by insufficient sand core shooting is reduced to less than 3%, the production efficiency is improved by more than 29%, the residual length of the sand blasting column is reduced, the sand blasting column can be easily ejected, and there is no situation that the sand blasting column is stuck and remains in the mold, which effectively reduces the frequency of contact between the operator and the mold when cleaning the mold, thereby eliminating the safety risk of scalding the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the nozzle structure of the sand core mold before improvement in the prior art;

[0020] Figure 2 This is a schematic diagram of the nozzle structure of the improved sand core mold of the utility model;

[0021] Figure 3 This is a front view of the nozzle of the sand core mold in the embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the sandblasting plate and the nozzle in the embodiment of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the upper mold in an embodiment of the utility model.

[0024] Figure numerals: 1, sand shooting plate; 2, upper mold; 3, positioning piece; 4, sand shooting channel; 41, nozzle; 5, matching hole; 6, water channel sand core. DETAILED DESCRIPTION

[0025] Example 1

[0026] like Figure 2 As shown, the utility model proposes a sand core mold embedded nozzle structure, including a sand shooting plate 1, an upper mold 2 and a lower mold; Figure 4 As shown, a plurality of vertical downward sand shooting channels 4 are arranged on the sand shooting plate 1; nozzles 41 are arranged at the ends of the sand shooting channels 4; Figure 5 As shown, a plurality of matching holes 5 are preset on the upper die 2;

[0027] During actual use, the equipment first drives the upper mold 2 to close the lower mold; during the closing process, the guide column is used for positioning. After the closing is completed, the upper mold 2 and the lower mold are combined to form a complete mold; at this time, the external equipment drives the sand shooting plate 1 to move downward, so that it gradually moves toward the mold that is combined into a whole; vertical downward positioning members 3 are set at both ends of the sand shooting plate 1, and the positioning members 3 cooperate with the positioning holes on the lower mold for positioning. After the sand shooting plate 1 is positioned by the positioning members 3, it moves to the specified position.

[0028] Under the action of compressed air, the coated sand in the sand bucket of the equipment is automatically shot into the sand mold cavity through the sand shooting channel 4 and the special nozzle 41 according to the sand shooting program to complete the sand core filling. After meeting the process requirements of core making, the equipment automatically drives the sand shooting plate 1 to separate the sand shooting channel 4 from the matching hole 5 of the upper mold 2, completes the separation of the sand shooting plate 1 from the upper mold 2, returns to its original position, and enters the next sand shooting cycle operation; after the molding sand is solidified, a water channel sand core 6 is formed; then the mold is opened to complete the core making operation.

[0029] like Figure 1 As shown, the product made by the equipment in the prior art has a small waterway sand core and a complex shape and structure. Since the diameter of the waterway sand core 6 is generally between 6 and 10 mm, and the structure is small and complex, when the sand core is shot, the conventional design is that the nozzle 41 is flush with the upper mold plane, which causes the sand column of the waterway sand core 6 to be very thin and long in the upper mold 2 mold body, and its effective length is more than 95 mm. When shooting the core, since the nozzle 41 is far from the sand core body and the nozzle diameter is small, the waterway sand core 6 is very easy to be shot insufficiently during the production process, resulting in a lack of meat defect and scrap.

[0030] At the same time, the waterway sand core 6 is demoulded in the upper mold by ejecting a sand column through a push rod. Since the sand column of the waterway sand core 6 is very thin and long in the mold body of the upper mold 2, it is very easy to break the sand column when the push rod ejects the sand column, and the sand column is easy to get stuck in the channel of the upper mold 2, resulting in frequent and difficult cleaning, resulting in a sand core scrap rate of more than 30%, and the sand core scrap rate remains high.

[0031] Compared with the prior art, in this embodiment, the sand shooting channel 4 is inserted into the matching hole of the upper mold 2, and each sand shooting channel 4 corresponds to only one matching hole 5. When the nozzle 41 is inserted into the matching hole 5 of the upper mold 2, the distance between it and the cavity is less than 10mm; at this time, the length of the sand shooting column formed by the water channel sand core 6 is less than 10mm; thereby improving the filling capacity of the molding sand, and at the same time solving the problem of the water channel sand core breaking during ejection due to the excessively high residual sand shooting column, reducing the quality waste of the sand core caused by insufficient sand core shooting to less than 3%, and improving the production efficiency by more than 29%. The residual length of the sand shooting column is reduced, and the sand shooting columns can be easily ejected. There is no situation where the sand shooting column is stuck and remains in the mold, which effectively reduces the frequency of contact between the operator and the mold when cleaning the mold, thereby eliminating the safety risk of scalding the operator.

[0032] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A sand core mold embedded nozzle structure, comprising a sand shooting plate (1), an upper mold (2) and a lower mold, characterized in that: A plurality of groups of vertical downward sand shooting channels (4) are arranged on the sand shooting plate (1); and nozzles (41) are arranged at the ends of the sand shooting channels (4); The upper mold (2) is combined with the lower mold to form a complete mold; The external device drives the sandblasting plate (1) to move downward, so that it gradually moves toward the mold that is integrated into a whole; A plurality of matching holes (5) are preset on the upper die (2); The sand shooting channel (4) is inserted into the matching hole of the upper mold (2), and the coated sand in the sand bucket is shot into the sand mold cavity through the sand shooting channel (4) and the nozzle (41) under the action of compressed air to complete the sand core filling, and forms a water channel sand core (6) after solidification.

2. The sand core mold embedded nozzle structure according to claim 1, characterized in that: Each sand-shooting channel (4) corresponds to only one matching hole (5).

3. The sand core mold embedded nozzle structure according to claim 1, characterized in that: The sand shooting channel (4) is a cylindrical structure, and a channel for the movement of molding sand is formed inside the channel; the nozzle (41) is installed at the bottom of the channel.

4. The sand core mold embedded nozzle structure according to claim 1, characterized in that: The upper die (2) and the lower die are positioned and installed via guide pillars.

5. The sand core mold embedded nozzle structure according to claim 1, characterized in that: Positioning pieces (3) are arranged vertically downward at both ends of the sandblasting plate (1), and the positioning pieces (3) cooperate with positioning holes on the lower die for positioning.

6. The sand core mold embedded nozzle structure according to claim 1, characterized in that: After the nozzle (41) is inserted into the matching hole (5) of the upper mold (2), the distance between the nozzle (41) and the cavity is less than 10 mm.

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