Automatic cleaning tool for sand core parting burrs

Abstract

The utility model discloses a sand core parting burr automatic cleaning tool which comprises an upper die and a lower die, a sand core upper profiling inner cavity is formed in the upper die, a sand core lower profiling inner cavity is formed in the lower die, sand core positioning blocks are arranged on the lower die and located on the side edge of the sand core lower profiling inner cavity, a sand collecting groove is formed in the lower portion of the lower die through an air channel pipeline, and a sand core is arranged in the sand collecting groove. And fine sand is filled in the sand collecting groove. And a gas circuit control switch is arranged on the sand collecting tank. The sand core parting line cleaning device can realize parallel cleaning action on each area of a parting line of sand core parting burrs, and compared with the serial cleaning action of traditional manual cleaning and manipulator full-automatic cleaning, the cleaning time is effectively shortened, the cleaning consistency is good, the sand core quality is ensured, the structure is simplified, the investment is less, the operation is simple and convenient, and the production efficiency is improved. And the cleaning medium fine sand can be reused, so that resources are saved.

Description

Technical Field

[0001] The invention relates to a tooling facility, in particular to a sand core parting burr cleaning tool used in a casting process. Background Art

[0002] During the sand casting production process, the sand core and the mold together form the internal and external contours of the casting. The sand core is a key element in forming the inner cavity of the casting. The contour dimensional accuracy and appearance density of the sand core directly determine the contour size and appearance roughness of the final casting. Conventional sand core production processes include coated sand hot process, cold core process, or inorganic warm core process, and all require the use of sand core molds. After the sand core is formed, a parting flash is generally formed. The traditional process method is to manually use a simple cleaning tool (scraper) to scrape off this parting flash along the parting line contour. This method has high requirements for the operator. For example, uneven operating force and high physical exertion result in poor consistency in the surface quality of the cleaned sand core. In addition, with the development of robot technology, the industry generally uses robot clamps and rotating grinding heads to fully automatically clean the parting flash of sand cores. However, this equipment investment is large, the grinding head wears out quickly and needs to be replaced frequently, and it has high requirements for the working environment. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned technology and provide a sand core parting burr automatic cleaning tool that can automatically clean the sand core and has a simplified structure, thereby achieving the goals of simple cleaning, environmental protection and low investment.

[0004] The object of the present invention is achieved through the following technical scheme: a sand core parting burr automatic cleaning tool comprises an upper mold and a lower mold, an upper sand core profiling cavity is provided in the upper mold, a lower sand core profiling cavity is provided in the lower mold, a sand core positioning block is installed on the lower mold and on the side of the lower sand core profiling cavity, and a sand collecting trough is installed under the lower mold through an air pipeline, and fine sand is contained in the sand collecting trough.

[0005] The sand collecting trough is equipped with an air control switch. The air pipes are arranged in groups around the lower die. Guide holes are located on the sides of the upper die, and guide posts corresponding to the guide holes are installed on the lower die to guide and limit the upper die's upward and downward movement. Support posts are installed between the lower die and the sand collecting trough.

[0006] After adopting the structure of the present invention, the air circuit time and air pressure are controlled by the air circuit control switch. The compressed air and fine sand in the sand collecting tank enter the lower mold through the air circuit pipe and follow the gap channel of the parting line contour of the sand core parting burr to more evenly impact the sand core parting burr to be cleaned. The cleaned parting burr can flow to the sand collecting tank along the sand discharge port of the lower mold. This structure realizes parallel cleaning action for the parting line of each area of the sand core. Compared with the serial cleaning action of traditional manual cleaning and fully automated cleaning by a robot, it effectively reduces cleaning time and improves cleaning consistency, ensuring the quality of the sand core. It has a simple structure, low investment, simple operation, and the fine sand used as the cleaning medium can be reused, realizing resource conservation. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0008] Figure 1 It is a structural schematic diagram of the present invention (the upper mold and the lower mold are in a separated state).

[0009] Figure 2 for Figure 1 Schematic diagram of the structure of the middle and upper mold.

[0010] Figure 3 for Figure 1 Schematic diagram of the structure of the middle and lower molds. DETAILED DESCRIPTION

[0011] Reference Figures 1 to 3 The automatic cleaning tool for the sand core parting burr of the present invention comprises an upper mold 1 and a lower mold 4. An upper sand core profiling cavity 11 is provided in the upper mold 1 (the edge of which has a gap of about 2 mm with the sand core to be cleaned, for accommodating the upward protruding part of the sand core), and a lower sand core profiling cavity 13 is provided in the lower mold 4 (for accommodating the downward protruding part of the sand core, corresponding to the position of the upper sand core profiling cavity 11). Sand core positioning blocks 12 (one on each side, slightly different in shape and used for the main positioning of the sand core 3) are installed on the lower mold 4 and at the sides of the lower sand core profiling cavity 13. A sand collecting trough 9 is installed under the lower mold 4 through an air pipe 6 (with an interface and correspondingly connected to the vent hole in the lower mold), and fine sand 10 is filled in the sand collecting trough 9. Auxiliary positioning blocks 14 (one on each side, such as Figure 3 As shown), the sand core is assisted in positioning.

[0012] An air circuit control switch 8 (and an air vent) is installed on the sand collecting trough 9. The air circuit control switch 8 is connected to an external compressed air generator and is divided into three branches to enter the sand collecting trough, and the sand collecting trough is sealed. The air circuit pipes 6 are divided into several groups and distributed around the bottom of the lower mold 4 (corresponding to the parting line area of the sand core). Guide holes 2 are provided on the side of the upper mold 1 (one on each side), and guide columns 5 (one on each side) corresponding to the position of the guide holes are installed on the lower mold 4 to guide and limit the up and down movement of the upper mold. A support column 7 is installed between the lower mold 4 and the sand collecting trough 9. Sand core head pressing and positioning surfaces are provided in the upper mold 1 and the lower mold 4 to ensure that the sand core 3 cannot shake in this cleaning tool after the upper and lower molds are closed.

[0013] Combined with the attached drawings, the specific steps are as follows:

[0014] Step 1: Open the upper mold 1 upward and use an air gun to remove any foreign matter from the sand core parting burr automatic cleaning tooling. Step 2: Pour an appropriate amount of fine sand into the sand collection trough 9 through the vent holes and air pipe 6 of the lower mold 4. Step 3: Gently place the sand core 3 to be cleaned onto the sand core positioning block 12 and auxiliary positioning block 14 of the lower mold 4 (note the placement direction), aligning the positions of the sand core lower contour cavity 13 and the sand core upper contour cavity 11. Step 4: Align the two guide holes 2 of the upper mold 1 with the two guide posts 5 of the lower mold, and lower the upper mold 1 downward, so that the upper mold 1 and the lower mold 5 are in a closed state. The closing gap should be less than 0.2 mm. Step 5: Connect the external interface of the air circuit control switch 8 to the compressed air pipeline of the external compressed air generator, and activate the air circuit control switch 8 for 3 seconds. Compressed air enters the sand collecting trough, driving the fine sand within through the air pipe 6 and the air vent into the lower mold 4, where it strikes various areas of the parting edge of the sand core 3, automatically cleaning it. Step 6: After the automatic cleaning is complete, the upper mold 1 is moved upward, removing the cleaned sand core 3. The fine sand then falls back into the sand collecting trough, achieving reuse and reusing. This enters the next cycle.

[0015] In this design, the upper mold 1 and the lower mold 4 have two functions: one is to fix the sand core 3 to be cleaned, and the other is to have an air channel (air vent) inside that is connected to the air pipeline, ensuring that the fine sand can follow this air channel under a certain air pressure and hit the parting edge of the sand core more evenly, and all the air channels form parallel channels, effectively improving the cleaning cycle efficiency. The air control switch 8 mentioned is mainly used to connect and control the air pressure and time, and reasonably set the air pressure and time according to the different degrees of burrs on the parting edge of the sand core, so as to achieve universality and convenience. According to the production process of the hot sand core used in casting, Figure 1The sand core 3 shown is a structurally irregular part with a curved parting line. The sand core is complex and thin-walled, making manual cleaning with a simple scraper demanding. Frequent spatial angle changes can easily scratch the core, leading to rework and repair, or even scrapping. This sand core 3 is produced using a hot process. Using a simple scraper to clean its parting edge takes about 60 seconds, while using the present invention only takes 10 seconds. The cleaning process requires no manual intervention, requiring only clamping and placement, reducing reliance on employee skill and physical effort.

Claims

1. The automatic cleaning tool for sand core parting burrs includes an upper die and a lower die, and is characterized by: A sand core upper profiling cavity is provided in the upper mold, a sand core lower profiling cavity is provided in the lower mold, a sand core positioning block is installed on the lower mold and on the side of the sand core lower profiling cavity, and a sand collecting trough is installed under the lower mold through an air pipeline, and fine sand is filled in the sand collecting trough.

2. The automatic cleaning tool for sand core parting burrs according to claim 1, characterized in that: An air path control switch is arranged on the sand collecting trough.

3. The automatic cleaning tool for sand core parting burrs according to claim 1 or 2, characterized in that: A guide hole is provided on the side of the upper die, and a guide column corresponding to the position of the guide hole is installed on the lower die.

4. The automatic cleaning tool for sand core parting burrs according to claim 3, characterized in that: A support column is arranged between the lower mold and the sand collecting trough.

5. The automatic cleaning tool for sand core parting burrs according to claim 1 or 2, characterized in that: The air pipelines are divided into several groups and distributed around the periphery under the lower mold.

6. The automatic cleaning tool for sand core parting burrs according to claim 1 or 2, characterized in that: An auxiliary positioning block is arranged on the lower die and at the bottom of the lower profiling inner cavity of the sand core.

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