A core shooting process for hand-molded steel ball casting

Abstract

The invention provides a manual mold steel ball casting core shooting process, which belongs to the technical field of core shooting machines and overcomes the technical defects of poor quality and low efficiency of mold sand shaping of existing core shooting machines. The invention comprises a mold for making products, which is characterized in that: the mold is slidably supported on a water-cooled track, and the water-cooled track is respectively provided with a preparation position and a sand shooting position near the end and the middle, a sand shooting cylinder is provided above the sand shooting position mold, a mold electric heating plate is provided below the sand shooting position mold, and a gas heating burner for heating the mold is provided below the preparation position water-cooling track. The equipment of the invention can heat and sand shoot on the water-cooled track at the same time, and can also heat multiple molds at the same time, thereby improving the efficiency of the sand shooting process and the use efficiency of the equipment; the water-cooled track increases the service life of the overall equipment; the sand shooting cylinder and the sand hopper can replenish the sand source in time to ensure the continuous progress of the sand shooting process, which is beneficial to the normalization of mass production.

Description

Technical Field

[0001] The invention belongs to the technical field of core shooting machines, and in particular relates to a hand-mold steel ball casting core shooting process. Background Art

[0002] Core shooters are widely used in the foundry industry. They produce precise cores with smooth surfaces. Core shooters operate by injecting a core sand mixture with a liquid or solid thermosetting resin binder into a heated core box. The sand core is preheated and quickly hardens to a desired thickness before being removed from the box. This results in a high-quality, smooth, and precisely dimensioned finished core.

[0003] Core shooting machines have been widely used in recent years because they can reduce the waste of pouring heads by stacking multiple boxes. The coated sand after pouring has good disintegration properties, which is conducive to sand cleaning. The sand mold size is precise, which can appropriately reduce the processing volume. The operation is simple and the casting yield is high. Therefore, more foundries prefer to use core shooting machines for molding.

[0004] In the prior art, the core shooting machine does not have an automatic unloading function, and the unloading speed is slow, which seriously affects the core making efficiency.

[0005] In Chinese patent literature, a patent document entitled "Core Shooter" with publication number CN 212144420 U addresses the aforementioned issues. The utility model discloses a core shooter comprising a core shooter body, a lower die mounted on a worktable, sand-shooting mechanisms on either side of the lower die, and an upper die that moves up and down with a push plate to approach or move away from the lower die. The machine also includes a lifting mechanism and a conveying mechanism. The lifting mechanism comprises a base, a drive device, a lifting platform, and a four-link mechanism. The base is located on the side of the core shooter body, and the upper and lower ends of the four-link mechanism are hinged to the lifting platform and the base, respectively. The drive device has one end hinged to the base and the other end hinged to the side of the four-link mechanism facing away from the core shooter body. When the drive device pushes the four-link mechanism to its limit position, the lifting platform is positioned above the lower die. When the drive device pulls the four-link mechanism to its limit position, the lifting platform descends and moves outward from the core shooter body. This utility model features automatic unloading, speeding up unloading and significantly improving core production efficiency.

[0006] However, the above patent documents require other heating equipment to heat the mold. After the mold is heated, the transfer temperature is likely to drop, which not only causes energy loss, but also affects the quality and efficiency of sand shooting molding. How to quickly transfer and ensure that the temperature of the mold does not drop, provide a new sand shooting process, improve the quality of sand molds, reduce molding time, and reduce energy loss, this is a technical problem that we urgently need to solve. Summary of the Invention

[0007] The purpose of the present invention is to provide a hand-molded steel ball casting core shooting process to solve the above technical problems existing in the prior art.

[0008] In accordance with the above objectives, the technical solution of the present invention is: a manual mold steel ball casting core shooting process, including a sand shooting device, characterized in that a sand shooting position is provided below the sand shooting device, and also includes a preparation position, a water cooling track is provided below the sand shooting position and the preparation position, and a mold that can slide left and right is provided on the water cooling track. The core shooting process of shooting sand into the mold includes the following steps:

[0009] Step 1: Start the water cooling circulation device connected to the water cooling track;

[0010] Step 2: Heat the mold at the preparation position of the water cooling track;

[0011] Step 3: heating the template installed below the sand shooting position that can be lifted up and down;

[0012] Step 4 also includes setting a sand filling position behind the sand shooting position to fill the sand shooting cylinder that can shoot sand into the mold;

[0013] Step 5: The mold heated to the predetermined temperature in step 2 is moved to the sand shooting position, and the template heated to the predetermined temperature in step 3 is pushed upward by the mold clamping cylinder provided below it to position and clamp the mold moved to the sand shooting position to form a sand shooting cavity between the mold and the template;

[0014] Step 6: Start the air cylinder behind the sand filling position to push the sand shooting tube filled with coated sand to the sand shooting position, start the pressing cylinder above the sand shooting position, press the sand shooting tube that can move up and down elastically until it is engaged with the upper opening of the mold, open the valve that uses the air pump to pass compressed air into the expansion pipe of the pressing cylinder, and spray the coated sand in the sand shooting tube into the sand shooting cavity between the mold and the template;

[0015] Step 7: Close the compressed air valve, return the compression cylinder, return the sand-shooting cylinder, and return the mold closing cylinder to drive the template to return. Move the mold sprayed with coated sand to the preparation position for the mold closing process.

[0016] Furthermore, the sand shooting position is located in the middle of the water-cooling track, and the preparation positions are located at both ends of the water-cooling track away from the sand shooting position.

[0017] Furthermore, the water-cooling circulation device in step 1 injects cooling water into the water-cooling track through a circulating water tank.

[0018] Furthermore, the temperature of heating the mold in step 2 is controlled within the range of 140-170 degrees.

[0019] More specifically, the heating method is to directly heat the gas through a gas heating burner.

[0020] Furthermore, the heating temperature in step 3 is controlled within the range of 180-210 degrees.

[0021] More specifically, the heating method is direct heating through an electric heating tube arranged in the template.

[0022] Furthermore, in the step 5, the side of the sand-shooting cavity close to the mold is a rough surface with rough machining marks, and the side close to the template is a smooth surface after being polished.

[0023] In the above-mentioned manual mold steel ball casting core shooting process, the sand shooting position and the preparation position are one station or multiple stations of one or more.

[0024] More specifically, the multi-station sand blasting station and preparation station can perform sand blasting and heating on multiple molds simultaneously.

[0025] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0026] 1. The equipment of the present invention is equipped with a gas heating burner at the preparation position of the water-cooling track, which can heat the mold in time and then quickly move to the sand shooting position through the water-cooling track. This not only reduces the loss of mold energy, but also facilitates the molding of the molding sand and improves the molding efficiency of the molding sand.

[0027] 2. The equipment of the present invention is provided with preparation positions at both ends of the water-cooling track, which can heat multiple molds at the same time and use the time interval between heating to perform sand shooting, thereby improving the efficiency of the sand shooting process and improving the utilization efficiency of the equipment;

[0028] 3. The equipment of the present invention is equipped with a water-cooled track to ensure that the mold heating will not affect the track and other components, thereby increasing the service life of the entire equipment;

[0029] 4. The equipment of the present invention is provided with a sand shooting tube and a sand hopper, which can replenish the sand source in time, ensure the continuous progress of the sand shooting process, and utilize the normalization of batch production. DETAILED DESCRIPTION

[0030] The following describes different embodiments of a hand-molded steel ball casting core shooting process.

[0031] Example 1: Double sand-blasting station, single-side heating at the preparation station

[0032] A core shooting process for manual mold steel ball casting includes a sand shooting device, wherein a sand shooting position is provided below the sand shooting device, and two preparation positions are provided. A water-cooling track is provided below the sand shooting position and the preparation position. An upper mold and a lower mold that can slide left and right are provided on the water-cooling track. The sand shooting position is located in the middle of the water-cooling track, and the preparation positions are located at both ends of the water-cooling track away from the sand shooting position. There are two stations, an upper mold and a lower mold, on one sand shooting position, and sand can be shot simultaneously. There is a preparation position at each end of the water-cooling track. Each preparation position can heat the upper mold and the lower mold at the same time. The core shooting process of shooting sand into the mold includes the following steps:

[0033] Step 1: Start the water cooling circulation device connected to the water cooling track, inject cooling water into the water cooling track through the circulating water tank, and ensure that the temperature of the water cooling track is within the specified range;

[0034] Step 2: Heat the upper and lower molds directly with gas through a gas heating burner at the left end of the water-cooling track, and control the heating temperature within the range of 150-160 degrees.

[0035] Step 3: The template installed below the shot sand position and can be lifted up and down is directly heated by the electric heating tube, and the heating temperature is controlled within the range of 190-200 degrees;

[0036] Step 4 also includes setting a sand filling position behind the sand shooting position to simultaneously fill sand into two sand shooting cylinders that can shoot sand to the upper mold and the lower mold;

[0037] Step 5: Move the mold, the left end of which has been heated to a predetermined temperature in step 2, to the sand shooting position, and push the template, which has been heated to a predetermined temperature in step 3, upward by two clamping oil cylinders provided below it to position and clamp the upper mold and the lower mold moved to the sand shooting position, thereby forming a sand shooting cavity between the upper mold and the lower mold and the template, wherein the sides of the sand shooting cavity close to the upper mold and the lower mold are rough surfaces with rough machining marks, and the sides close to the template are smooth surfaces after being polished;

[0038] Step 6: Start the air cylinder behind the sand filling position to push the two sand shooting tubes filled with coated sand to the sand shooting position, start the two pressing cylinders above the sand shooting position, press the two sand shooting tubes that can elastically move up and down until they are engaged with the upper and lower molds respectively, open the valve that uses the air pump to supply compressed air to the expansion pipe of the pressing cylinder, and spray the coated sand in the two sand shooting tubes into the sand shooting cavity between the upper and lower molds and their respective templates;

[0039] Step 7, close the compressed air valve, return the compression cylinder, return the sand-shooting cylinder, return the mold closing cylinder and drive the template to return, move the upper mold and lower mold sprayed with coated sand to the left preparation position for the mold closing process.

[0040] Example 2: Double sand-blasting stations with heating at both ends

[0041] A core shooting process for manual mold steel ball casting includes a sand shooting device, wherein a sand shooting position is provided below the sand shooting device, and two preparation positions are provided. A water-cooling track is provided below the sand shooting position and the preparation position. An upper mold and a lower mold that can slide left and right are provided on the water-cooling track. The sand shooting position is located in the middle of the water-cooling track, and the preparation positions are located at both ends of the water-cooling track away from the sand shooting position. There are two stations, an upper mold and a lower mold, on one sand shooting position, and sand can be shot simultaneously. There is a preparation position at each end of the water-cooling track. Each preparation position can heat the upper mold and the lower mold at the same time. The core shooting process of shooting sand into the mold includes the following steps:

[0042] Step 1: Start the water cooling circulation device connected to the water cooling track, inject cooling water into the water cooling track through the circulating water tank, and ensure that the temperature of the water cooling track is within the specified range;

[0043] Step 2: Directly heat two pairs of upper and lower molds at the left and right ends of the water-cooled rail using gas through a gas heating burner. The heating temperature is controlled within the range of 155-165 degrees.

[0044] Step 3: The template installed below the shot sand position and which can be lifted up and down is directly heated by an electric heating tube, and the heating temperature is controlled within the range of 195-205 degrees;

[0045] Step 4 also includes setting a sand filling position behind the sand shooting position to simultaneously fill sand into two sand shooting cylinders that can shoot sand to the upper mold and the lower mold;

[0046] Step 5: Move the upper mold and lower mold on the left side heated to the predetermined temperature in step 2 to the sand shooting position, and push the two upper molds and lower mold plates heated to the predetermined temperature in step 3 upward by two mold clamping cylinders provided below them to position and clamp the upper mold and lower mold plates moved to the sand shooting position, thereby forming a sand shooting cavity between the upper mold and the upper mold plate, and between the lower mold and the lower mold plate. The side of the sand shooting cavity close to the mold is a rough surface with rough machining marks, and the side close to the template is a smooth surface after polishing;

[0047] Step 6: Start the air cylinder behind the sand filling position to push the two sand shooting tubes filled with coated sand to the sand shooting position, start the two pressing cylinders above the sand shooting position, press the two sand shooting tubes that can elastically move up and down until they are engaged with the upper openings of the upper mold and the lower mold, open the valve that uses the air pump to supply compressed air to the telescopic tubes of the two pressing cylinders, and spray the coated sand in the two sand shooting tubes into the sand shooting cavity between the upper mold, the lower mold and their respective templates;

[0048] Step 7, close the compressed air valve, return the compression cylinder, return the sand-shooting cylinder, return the mold closing cylinder to drive the template to return, move the upper mold and lower mold sprayed with coated sand to the left preparation position for the mold closing process;.

[0049] Step 8: Simultaneously fill the two sand-shooting cylinders at the sand-filling position behind the sand-shooting position that can shoot sand to the upper mold and the lower mold;

[0050] Step 9: Move the upper mold and the lower mold on the right side that have been heated to the predetermined temperature in step 2 to the sand shooting position, and push the two upper molds and the lower mold plate that have been heated to the predetermined temperature in step 3 upward by two mold clamping cylinders provided below them to position and clamp the upper mold and the lower mold moved to the sand shooting position, thereby forming a sand shooting cavity between the upper mold and the upper mold plate, and between the lower mold and the lower mold plate. The side of the sand shooting cavity close to the mold is a rough surface with rough machining marks, and the side close to the template is a smooth surface after polishing;

[0051] Step 10: Start the air cylinder behind the sand filling position to push the two sand shooting tubes filled with coated sand to the sand shooting position, start the two pressing cylinders above the sand shooting position, press the two sand shooting tubes that can elastically move up and down until they are engaged with the upper openings of the upper mold and the lower mold, open the valve that uses the air pump to supply compressed air to the telescopic tubes of the two pressing cylinders, and spray the coated sand in the two sand shooting tubes into the sand shooting cavity between the upper mold, the lower mold and their respective templates;

[0052] Step 11: Close the compressed air valve, return the compression cylinder, return the sand-shooting cylinder, and return the mold closing cylinder to drive the template to return. Move the upper mold and lower mold sprayed with coated sand to the right preparation position for the mold closing process.

[0053] Example 3: Sand blasting station 4, simultaneous heating on both sides of the preparation station

[0054] A core shooting process for manual mold steel ball casting includes a sand shooting device, two pairs of sand shooting positions are provided below the sand shooting device, and two preparation positions are also provided. A water-cooling track is provided below the sand shooting position and the preparation position. Two pairs of upper molds and lower molds that can slide left and right are provided on the water-cooling track. The sand shooting position is located in the middle of the water-cooling track, and the preparation position is located at both ends of the water-cooling track away from the sand shooting position. There are two pairs of upper molds and lower molds on the two pairs of sand shooting positions, totaling four stations, which can shoot sand simultaneously. There is a preparation position at each end of the water-cooling track. Each preparation position can heat a pair of upper molds and lower molds at the same time. The core shooting process of shooting sand into the mold includes the following steps:

[0055] Step 1: Start the water cooling circulation device connected to the water cooling track, inject cooling water into the water cooling track through the circulating water tank, and ensure that the temperature of the water cooling track is within the specified range;

[0056] Step 2: Directly heat a pair of upper and lower molds at two preparation positions on the left and right ends of the water-cooled track using gas through a gas heating burner, and control the heating temperature within the range of 158-163 degrees.

[0057] Step 3: Directly heat the four templates installed up and down under the two pairs of sandblasting positions through electric heating pipes, and control the heating temperature within the range of 198-203 degrees;

[0058] Step 4 also includes setting four sand filling positions behind the two pairs of sand shooting positions, and simultaneously filling sand into two pairs of four sand shooting cylinders that can shoot sand into the two pairs of upper molds and lower molds;

[0059] Step 5, move the pair of upper and lower dies whose left ends have been heated to the predetermined temperature in step 2 to the sand shooting position on the left, move the other pair of upper and lower dies whose right ends have been heated to the predetermined temperature to the sand shooting position on the right, push the pair of upper and lower dies whose left ends have been heated to the predetermined temperature in step 3, a total of two templates, upward by two clamping oil cylinders arranged thereunder and position them with the upper and lower dies moved to the left sand shooting position, push the other pair of two templates whose right sides have been heated to the predetermined temperature upward by the clamping oil cylinders arranged thereunder and position them with the other pair of upper and lower dies moved to the right sand shooting position, and clamp the molds to form a sand shooting cavity between the mold and the template, wherein the side close to the mold in the sand shooting cavity is a rough surface with rough machining marks, and the side close to the template is a smooth surface after polishing;

[0060] Step 6: Start the four air cylinders behind the sand filling position to push the four sand shooting tubes filled with coated sand to the left and right sand shooting positions, start the four pressing cylinders above the left and right sand shooting positions, press the four sand shooting tubes that can elastically move up and down down to engage with the upper openings of the two pairs of molds, open the valves that use the air pump to supply compressed air to the telescopic tubes of the four pressing cylinders, and spray the coated sand in each of the four sand shooting tubes into the sand shooting cavity between the mold and the template;

[0061] Step 7, close the compressed air valve, return the compression cylinder, return the sand-shooting cylinder, return the mold closing cylinder and drive the template to return, move the upper mold and lower mold sprayed with coated sand to the left preparation position for the mold closing process.

[0062] In the above-mentioned manual mold steel ball casting core shooting process, the sand shooting position and the preparation position are one station or more than one multi-station. The sand shooting position and the preparation position of the multiple stations can perform sand shooting and heating on multiple molds at the same time. Usually, the time of the sand shooting process is less than the heating time. The two preparation positions at both ends of the water-cooling track can be heated at different times, and the middle sand shooting position can be shared at different times to make full use of the entire equipment.

[0063] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0064] The above is an introduction to the hand-molded steel ball casting core shooting process provided by the present invention. In this introduction, specific preferred embodiments are used to illustrate the principles and implementation methods of the present invention. These embodiments are only used to help understand the principles and core ideas of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the design ideas of the present invention, the implementation plans in the above embodiments can be further combined or replaced, and the present invention can be improved and modified in several ways. These improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A hand-molded steel ball casting core shooting process, comprising a sand shooting device, characterized in that: A sand shooting position is provided below the sand shooting device, and also includes a preparation position. A water cooling track is provided below the sand shooting position and the preparation position. A mold that can slide left and right is provided on the water cooling track. The core shooting process of shooting sand into the mold includes the following steps: Step 1, starting a water cooling circulation device connected to the water cooling track; Step 2, heating the mold at the preparation position of the water cooling track; Step 3, heating the template that can be lifted up and down below the sand shooting position; Step 4 also includes setting a sand filling position behind the sand shooting position to fill the sand shooting cylinder that can shoot sand into the mold; Step 5, moving the mold heated to a predetermined temperature in step 2 to a sand shooting position, and pushing the template heated to a predetermined temperature in step 3 upwards through a mold clamping cylinder arranged below the mold to position and clamp the mold moved to the sand shooting position to form a sand shooting cavity between the mold and the template; Step 6: Start the cylinder behind the sand filling position to push the sand shooting tube filled with coated sand to the sand shooting position, start the pressing cylinder above the sand shooting position, press the sand shooting tube that can move up and down elastically to engage with the upper opening of the mold, open the valve that uses the air pump to pass compressed air into the telescopic tube of the pressing cylinder, and spray the coated sand in the sand shooting tube into the sand shooting cavity between the mold and the template; Step 7, close the compressed air valve, return the compression cylinder, return the sand-shooting tube, return the mold-closing cylinder to drive the mold plate to return, and move the mold sprayed with coated sand to the preparation position for the mold-closing process.

2. The hand-molded steel ball casting core shooting process according to claim 1 is characterized in that: The sand shooting position is located in the middle of the water cooling track, and the preparation positions are located at two ends of the water cooling track away from the sand shooting position.

3. The hand-molded steel ball casting core shooting process according to claim 1 is characterized in that: The water-cooling circulation device in step 1 injects cooling water into the water-cooling track through a circulating water tank.

4. The hand-molded steel ball casting core shooting process according to claim 1 is characterized in that: The temperature of heating the mold in step 2 is controlled within the range of 140-170 degrees.

5. The hand-molded steel ball casting core shooting process according to claim 4 is characterized in that: The heating method is to directly heat the gas through a gas heating burner.

6. The hand-molded steel ball casting core shooting process according to claim 1 is characterized in that: The heating temperature in step 3 is controlled within the range of 180-210 degrees.

7. The hand-molded steel ball casting core shooting process according to claim 6 is characterized in that: The heating method is direct heating through an electric heating tube arranged in the mold plate.

8. The hand-molded steel ball casting core shooting process according to claim 1 is characterized in that: In the step 5, the side of the sand shooting cavity close to the mold is a rough surface with rough machining marks, and the side close to the template is a smooth surface after grinding.

9. The hand-molded steel ball casting core shooting process according to any one of claims 1 to 8, characterized in that: The sand shooting position and the preparation position are one station or more than one station.

10. The hand-molded steel ball casting core shooting process according to claim 9, characterized in that: The multi-station sand blasting station and the preparation station can perform sand blasting and heating on a plurality of molds simultaneously.