Process for producing pump parts

Abstract

A process for producing pump parts. The process comprises the following steps: a, preparation of a molding-sand mold; b, preparation a black-sand mold; c, pouring; d, de-sanding, which is carried out by using an unloading device; e, recovery; and f, surface treatment. By using precoated sand and black sand to prepare the parts, wax melting and roasting processes in an investment casting process are omitted, such that the process is simplified, and the production period is shortened; and sand cleaning is convenient, such that the production efficiency of the parts is improved.

Description

Pump parts production process Technical Field

[0001] The present application relates to the field of parts production, and in particular to a production process for pump parts. Background Art

[0002] A pump is a machine that transports or pressurizes fluids. It transfers the mechanical energy of a prime mover or other external energy to the liquid, increasing the liquid's energy. Pumps are primarily used to transport liquids such as water, oil, acids and alkalis, emulsions, suspensoids, and liquid metals. They can also transport liquid-gas mixtures and liquids containing suspended solids.

[0003] The pump is composed of multiple parts such as impeller, pump body, pump shaft, etc. In actual production, the above parts are generally made by investment casting process. However, the investment casting production process is complicated and the production efficiency is low, which is not conducive to the mass production of parts and needs to be improved. Summary of the Invention

[0004] In order to improve the problem of low production efficiency of pump parts, the present application provides a production process for pump parts.

[0005] The present application provides a production process for pump parts using the following technical solutions:

[0006] A production process for pump parts, comprising the following steps:

[0007] a. Preparation of molding sand mold: Prepare the molding sand upper mold and the molding sand lower mold according to the design requirements of the component drawings, and assemble the molding sand upper mold and the molding sand lower mold to obtain the molding sand model;

[0008] b. Preparation of black sand mold: Design and prepare black sand upper mold and black sand lower mold according to the size requirements of the molding sand model, place the molding sand model in the black sand lower mold, and place the casting filter in the flow channel of the black sand lower mold, and then assemble the black sand upper mold and black sand lower mold to obtain the black sand model;

[0009] c. Pouring: Pour the molten iron into the black sand mold through the pouring port on the black sand mold and cool it to produce the initial parts;

[0010] d. Sand removal: Break the black sand pattern on the surface of the primary parts, and then place the primary parts on the conveyor belt and transport them to the unloading device for sand removal;

[0011] e. Recovery: Collect the crushed black sand and the black sand falling from the unloading device;

[0012] f. Surface treatment: The initial parts after sand removal in the unloading device are taken out and polished to obtain finished parts.

[0013] By adopting the above technical solution and using coated sand and black sand to prepare parts, the wax melting and roasting processes in the investment casting process are reduced, the process is simplified, and the production cycle is shortened, thereby improving the production efficiency of parts and components and reducing the energy consumed by wax melting and roasting, which has the effect of energy saving and emission reduction. Compared with wax, black sand is not easy to stick to the surface of parts, making sand cleaning more convenient, thereby further improving the production efficiency of parts and components, and facilitating the mass production of parts and components.

[0014] Preferably, the unloading device includes a frame and a unloading roller rotatably connected to the frame, the unloading roller is provided with a through hole, and the outer wall of the unloading roller is provided with a plurality of discharge ports, and the plurality of discharge ports are all located at one end of the unloading roller and are circumferentially distributed along the rotation axis of the unloading roller, and a plurality of scrapers are provided on the inner wall of the through hole, and the plurality of scrapers are all located on one side of the discharge port, and the plurality of scrapers are distributed along the rotation direction of the unloading roller toward the discharge port, and each of the scrapers is inclined along the rotation direction of the unloading roller toward the discharge port, and the frame is provided with a driving component for driving the unloading roller to rotate.

[0015] By adopting the above technical solution, a discharge roller, a scraping bar and a discharge port are provided. After the black sand pattern on the surface of the preliminary parts is broken, some small pieces of black sand will remain on the surface of the preliminary parts. The above preliminary parts are placed in the through-hole, and the discharge roller is rotated to make the preliminary parts roll in the through-hole. During the rolling process, the scraping bar in the through-hole scrapes off the black sand on the surface of the preliminary parts, and then the scraped black sand gradually rolls down to the discharge port along the scraping bar, and is discharged through the discharge port, thereby removing the sand from the preliminary parts. There is no need for staff to manually clean the black sand on the surface of the preliminary parts, making sand removal more convenient and conducive to improving the production efficiency of parts.

[0016] Preferably, a plurality of convex strips are further provided on the inner wall of the through hole, and the plurality of convex strips are circumferentially spaced apart along the rotation axis of the discharge roller, and the length direction of the convex strips is arranged parallel to the rotation axis of the discharge roller.

[0017] By adopting the above technical solution, convex strips are provided. When the discharge roller rotates, part of the black sand is blocked by the convex strips and then rises along with the rotation of the discharge roller. When it rises to a certain height, the larger black sand falls under the action of gravity, and then hits the bottom inner wall of the through hole and breaks. The crushed black sand can be discharged through the discharge port, which improves the sand removal effect of the discharge roller. There is no need for staff to take out the larger black sand for crushing, making sand removal more convenient.

[0018] Preferably, a plurality of elastic strips are fixed on the inner wall of the through hole, and the plurality of elastic strips are located on the side of the discharge port close to the scraper bar and are staggered with the scraper bar, and the plurality of elastic strips are circumferentially distributed along the rotation axis of the unloading roller, and the length of each elastic strip is less than the thickness of the scraper bar.

[0019] By adopting the above technical solution, an elastic strip is provided. When the preliminary parts roll with the rotation of the discharge roller, the elastic strip cushions the preliminary parts, thereby reducing the collision between the preliminary parts and the inner wall of the through hole and the wear of the preliminary parts. In addition, during the rolling of the preliminary parts, the elastic strip contacts the preliminary parts and generates frictional resistance, thereby scraping off some small particles of black sand adsorbed on the surface of the preliminary parts, so that the discharge roller has a better sand removal effect on the preliminary parts.

[0020] Preferably, a material receiving box is provided on the frame, and the material receiving box is located below the unloading roller. The material receiving box includes a box body provided on the frame and a drawer plate slidably connected to the box body. The end face of the box body close to the unloading roller is provided with a receiving groove, and the receiving groove is located below the discharge port. The drawer plate is located on one side of the box body and is slidably connected to the receiving groove, and the drawer plate slides close to or away from the box body. A through hole is vertically provided on the drawer plate, and the through hole is connected to the receiving groove.

[0021] By adopting the above technical solution, a box body, a drawer plate, a receiving groove and a perforation are provided, and the scraped black sand falls into the receiving groove through the discharge port and falls into the perforation, thereby collecting the fallen black sand for subsequent recovery of the black sand, reducing the situation where the black sand is scattered around the discharge roller after falling, making it more convenient to collect the black sand. When the black sand in the box body is full, the black sand in the receiving groove can be scraped out by moving the drawer plate, without disassembling the entire box body to pour out the black sand, making it more convenient to take out the black sand.

[0022] Preferably, a sliding groove is provided on the outer wall of the drawer plate, and a limiting gear is rotatably connected to the box body. The limiting gear is located in the sliding groove, and a tooth surface is provided on an inner wall of the sliding groove along the sliding direction of the drawer plate, and the limiting gear is engaged with the tooth surface.

[0023] By adopting the above technical solution, a slide groove, a limiting gear and a tooth surface are set. When the draw plate moves, the limiting gear abuts against the inner wall of the slide groove to limit the draw plate, thereby reducing the situation where the draw plate slips out of the slide groove. The engagement between the limiting gear and the tooth surface reduces the sliding wear between the limiting gear and the inner wall of the slide groove, making the limiting gear more durable.

[0024] Preferably, the pulling plate includes a plate body slidably connected to the accommodating groove and an end cover arranged on the plate body, the through hole and the slide groove are arranged on the plate body, the end cover is located on the outside of the box body and abuts against the box body, a positioning block is provided on the rotating shaft of the limit gear, the positioning block is located on the outside of the box body, and a positioning groove is provided on the positioning block, when the end cover abuts against the box body, the positioning groove is located on the side of the positioning block close to the end cover, and a positioning piece is slidably connected to the end cover, and the positioning piece slides into the positioning groove and positions the end cover.

[0025] By adopting the above technical solution, a positioning block, a positioning groove and a positioning piece are provided. After the black sand in the receiving groove is taken out, the end cover is moved toward the direction close to the box body so that the end cover abuts against the box body. At this time, the positioning groove is toward the end cover, and the positioning piece is moved so that the positioning piece is stuck in the positioning groove. The positioning piece abuts against the inner wall of the positioning groove to position the positioning block. Since the limit gear and the tooth surface are engaged with each other, the limit gear cannot rotate after the positioning block is positioned, and the positioning of the draw plate can be realized on the box body, which reduces the situation where the draw plate slides away from the box body and causes the black sand in the receiving groove to leak out, making it more convenient to position the draw plate.

[0026] Preferably, a limiting cavity is opened in the end cover, and the positioning member includes a sliding portion slidably connected to the end cover and a limiting portion arranged on the sliding portion, the limiting portion is located in the limiting cavity, the positioning groove is for the sliding portion to be inserted into, and an elastic member is provided on the sliding portion, and the opposite ends of the elastic member are respectively pressed against the limiting portion and the inner wall of the limiting cavity, and the elastic member makes the sliding portion have a tendency to be inserted into the positioning groove.

[0027] By adopting the above technical solution, a sliding part, a limiting part and an elastic part are provided. When the drawer is opened, the sliding part is moved so that the sliding part disengages from the positioning groove, and the drawer can be moved in a direction away from the box body to scrape out the black sand. When the drawer is positioned, the sliding part is moved so that the limiting part squeezes the elastic part, and then the end cover is moved so that the end cover abuts against the box body. At this time, the positioning groove and the sliding part are aligned, the sliding part is released, the elastic part is reset and pushes the limiting part to drive the sliding part to be stuck in the positioning groove, so that the positioning of the drawer can be achieved, making positioning and opening of the drawer more convenient.

[0028] Preferably, a baffle is provided on the drawer plate, the baffle is located on a side of the drawer plate close to the box body, and the baffle is passed through the box body and the frame.

[0029] By adopting the above technical solution, a baffle is set. When the drawer slides away from the box, the drawer drives the baffle to move out so that the baffle blocks the receiving groove, thereby reducing the situation where the black sand in the discharge roller continues to fall into the receiving groove during the process of the drawer scraping out the black sand in the receiving groove, thereby reducing the situation where the subsequent drawer is stuck in the receiving groove by the black sand in the receiving groove. When the drawer slides into the receiving groove, the drawer drives the baffle to move, so that the inner wall of the receiving groove pushes the black sand that falls on the baffle into the receiving groove for collection.

[0030] Preferably, the driving assembly includes a transmission gear provided on the discharge roller, a driving gear rotatably connected to the frame, and a driving member provided on the frame, the transmission gear and the driving gear are engaged, and the driving member drives the driving gear to rotate.

[0031] By adopting the above technical solution, a transmission main wheel, a driving gear and a driving member are set. When the discharge roller needs to rotate, the driving member is controlled to drive the driving gear to rotate. The driving gear drives the transmission gear to rotate by meshing with the transmission gear, and then drives the discharge roller to rotate, making it more convenient to control the rotation of the discharge roller.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. The production process of the present application utilizes coated sand and black sand to prepare parts, thereby reducing the wax melting and baking processes in the investment casting process, simplifying the process, shortening the production cycle, thereby improving the production efficiency of parts, and reducing the energy consumed by wax melting and baking, achieving energy conservation and emission reduction effects. In addition, compared with wax, black sand is less likely to adhere to the surface of parts, making sand cleaning more convenient, thereby further improving the production efficiency of parts and facilitating mass production of parts.

[0034] 2. The unloading device in the production process of the present application is provided with a unloading roller, a scraping bar, and a discharge port. After the black sand pattern on the surface of the primary parts is broken, some small pieces of black sand will remain on the surface of the primary parts. The unloading roller rotates to cause the primary parts to roll in the through-holes, and the scraping bar scrapes off the black sand on the surface of the primary parts. The scraped black sand then rolls to the discharge port and is discharged, thereby removing sand from the primary parts. This makes sand removal more convenient and helps improve the production efficiency of parts.

[0035] 3. The unloading device in the production process of the present application is provided with a positioning block, a positioning groove and a positioning piece. After the black sand in the receiving groove is taken out, the end cover is moved so that the end cover abuts against the box body. At this time, the positioning groove faces the end cover, and the positioning piece is moved so that the positioning piece is stuck in the positioning groove. The positioning piece abuts against the inner wall of the positioning groove to position the positioning block. After the positioning block is positioned, the limit gear cannot rotate, and the positioning of the draw plate on the box body can be realized, making positioning the draw plate more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] FIG1 is an overall schematic diagram of a discharge device in an embodiment of the present application;

[0037] FIG2 is a structural diagram of the unloading device in accordance with an embodiment of the present application, cut away at the frame, mainly showing the structure of the drive assembly;

[0038] FIG3 is a schematic diagram of a partial structure of a discharge device according to an embodiment of the present application, mainly showing the structure of the elastic strip;

[0039] FIG4 is a schematic diagram of a partial structure of the unloading device in an embodiment of the present application, mainly showing the structure of the pumping plate;

[0040] FIG5 is a structural diagram of the unloading device in the embodiment of the present application, cut away at the material receiving box, mainly showing the structure of the limiting gear;

[0041] FIG6 is a structural diagram of a discharge device partially cut away at the end cover in an embodiment of the present application;

[0042] FIG7 is an enlarged view of portion A in FIG6 , mainly showing the structure of the positioning member.

[0043] Explanation of the accompanying drawings: 1. Frame; 2. Discharge roller; 21. Through hole; 22. Discharge port; 3. Material receiving box; 31. Box body; 311. Accommodating groove; 32. Drawing plate; 321. Plate body; 3211. Perforation; 322. End cover; 3221. Limiting cavity; 4. Driving assembly; 41. Transmission gear; 42. Driving gear; 43. Driving member; 5. Scraper strip; 6. Raised strip; 7. Elastic strip; 8. Inclined surface; 9. Slide groove; 91. Tooth surface; 10. Limiting gear; 11. Positioning block; 111. Positioning groove; 12. Positioning member; 121. Sliding portion; 122. Limiting portion; 13. Elastic member; 14. Baffle. Implementation Method

[0044] The present application is further described in detail below with reference to Figures 1-7.

[0045] The present application discloses a process for producing pump parts, comprising the following steps:

[0046] a. Preparation of Sand Molds: Prepare the upper and lower sand molds according to the design requirements of the component drawings. Assemble the upper and lower sand molds to form a sand model. Heat and solidify the mold at 140°C and set aside.

[0047] b. Preparation of black sand mold: Design and prepare black sand upper mold and black sand lower mold according to the size requirements of the molding sand model, place the molding sand model in the black sand lower mold, and place the casting filter in the flow channel of the black sand lower mold, and then assemble the black sand upper mold and black sand lower mold to obtain the black sand model;

[0048] c. Pouring: Pour the molten iron into the black sand mold through the pouring port on the black sand mold and cool it at room temperature to obtain the initial parts;

[0049] d. Sand removal: Break the black sand pattern on the surface of the primary parts, and then place the primary parts on the conveyor belt and transport them to the unloading device for sand removal;

[0050] e. Recovery: Collect the crushed black sand and the black sand falling from the unloading device;

[0051] f. Surface treatment: The initial parts after sand removal in the unloading device are taken out and polished to obtain finished parts.

[0052] Referring to Figures 1 and 2, the above-mentioned unloading device includes a frame 1, a unloading roller 2, and a receiving box 3. The unloading roller 2 is rotatably connected to the frame 1, and the rotation axis of the unloading roller 2 is arranged horizontally. A drive assembly 4 is provided on the frame 1. The drive assembly 4 includes a transmission gear 41, a driving gear 42, and a driving member 43. The transmission gear 41 is sleeved on the outside of the unloading roller 2 and fixedly connected to the unloading roller 2. The driving gear 42 is located on one side of the transmission gear 41 and is rotatably connected to the frame 1. The driving gear 42 meshes with the transmission gear 41. The driving member 43 is fixed to the outer wall of the frame 1. The output shaft of the driving member 43 passes through the frame 1 and is fixedly connected to the driving gear 42. The driving member 43 drives the driving gear 42 to rotate. In this embodiment, the driving member 43 is a motor.

[0053] In actual use, the driving member 43 is controlled to drive the driving gear 42 to rotate, and the driving gear 42 drives the discharge roller 2 to rotate by meshing with the transmission gear 41.

[0054] Referring to Figure 1 , the discharge roller 2 is provided with a through-hole 21 that extends through the discharge roller 2 along its rotational axis. The outer wall of the discharge roller 2 is provided with a plurality of circular discharge ports 22 , each located at one end of the discharge roller 2 and connected to the through-hole 21 . The discharge ports 22 are evenly spaced along the axial direction of the discharge roller 2 and circumferentially along its rotational axis.

[0055] Referring to Figure 3, a plurality of scraper strips 5 are fixed on the inner wall of the through hole 21, and the scraper strips 5 are all located on one side of the discharge port 22. The scraper strips 5 are evenly spaced in a spiral shape along the rotation direction of the discharge roller 2 toward the discharge port 22, and each scraper strip 5 is tilted along the rotation direction of the discharge roller 2 toward the discharge port 22.

[0056] After the black sand pattern on the surface of the primary product component is broken, some small pieces of black sand will still remain on the surface of the primary product component. The above-mentioned primary product component is placed in the through hole 21, and the unloading roller 2 rotates to make the primary product component roll in the through hole 21. During the rolling process, the scraping bar 5 in the through hole 21 scrapes off the black sand on the surface of the primary product component, and then the scraped black sand gradually rolls along the scraping bar 5 to the discharge port 22 and is discharged through the discharge port 22, thereby removing the sand from the primary product component.

[0057] As shown in Figure 3, a plurality of ridges 6 are fixed to the inner wall of the through hole 21. These ridges 6 are located within the area of ​​the discharge roller 2 where the discharge port 22 is formed. The ridges 6 are evenly spaced circumferentially along the rotation axis of the discharge roller 2, and the length of each ridge 6 is parallel to the rotation axis of the discharge roller 2. The end surface of each ridge 6 facing away from the inner wall of the through hole 21 is a circular arc surface. When the black sand rises due to the rotation of the discharge roller 2, it is blocked by the ridges 6 and then falls along the surface of the ridges 6 when it reaches a certain height, and then strikes the lower inner wall of the through hole 21, causing it to break.

[0058] As shown in Figure 3 , several elastic strips 7 are also fixed to the inner wall of through-hole 21. These strips 7 are located on the side of discharge port 22 near scraper strip 5 and are staggered with respect to scraper strip 5. The strips 7 are evenly spaced axially along discharge roller 2 and circumferentially along the rotational axis of discharge roller 2. The distance between adjacent strips 7 is greater than the diameter of discharge port 22, and the length of each strip 7 is radially aligned with discharge roller 2. The length of each strip 7 is less than the thickness of scraper strip 5. In this embodiment, the strips 7 are made of rubber.

[0059] When the preliminary parts roll with the rotation of the discharge roller 2, the elastic strips 7 cushion the preliminary parts, reducing the collision between the preliminary parts and the inner wall of the through hole 21 and the wear of the preliminary parts. In the rolling process of the preliminary parts, the elastic strips 7 come into contact with the preliminary parts and scrape off some small particles of black sand adsorbed on the surface of the preliminary parts. At the same time, the small particles of black sand will roll through the gaps between the elastic strips 7 and then fall out from the discharge port 22, reducing the situation where the black sand is stuck by the elastic strips 7, so that the discharge roller 2 has a better sand removal effect on the preliminary parts.

[0060] Referring to Figure 4, the material receiving box 3 includes a box body 31 and a drawer plate 32. The box body 31 is located below the discharge roller 2 and is fixed on the frame 1. A receiving groove 311 is provided on the end face of the box body 31 close to the discharge roller 2. The receiving groove 311 is located below the discharge port 22, and the several discharge ports 22 located at the lower end of the discharge roller 2 are all located in the receiving groove 311. The drawer plate 32 is located on a side of the box body 31 away from the frame 1. The drawer plate 32 includes a plate body 321 and an end cover 322. The plate body 321 passes through the box body 31 and is slidably connected to the accommodating groove 311, and the sliding direction of the plate body 321 is set toward or away from the box body 31. The end cover 322 is located on a side of the plate body 321 away from the box body 31 and is fixedly connected to the plate body 321. The end cover 322 is located on the outside of the box body 31. When the plate body 321 abuts against the inner wall of the accommodating groove 311 away from the end cover 322, the end cover 322 abuts against the outer wall of the box body 31.

[0061] Referring to Figure 4 , the lower inner wall of the plate 321 abuts the bottom inner wall of the receiving groove 311, and the horizontal outer wall of the plate 321 abuts the inner sidewall of the receiving groove 311. A vertical through-hole 3211 is formed in the plate 321, communicating with the receiving groove 311. An inclined surface 8 is machined and formed on the plate 321. The inclined surface 8 is located within the through-hole 3211 and at the end of the through-hole 3211 near the discharge port 22. The length of the inclined surface 8 extends along the inner circumferential wall of the through-hole 3211. The inclined surface 8 is tilted outward toward the discharge port 22, and the end of the inclined surface 8 away from the through-hole 3211 is flush with the inner wall of the receiving groove 311.

[0062] As shown in Figure 5 , the plate 321 has two outer walls that face each other along its sliding direction, each with a slot 9 defined thereon. The lengths of the slots 9 are parallel to the sliding direction of the plate 321, and the slots 9 are aligned. Both slots 9 extend through the plate 321, facing away from the housing 31. A toothed surface 91 is fixed to the inner wall of the upper end of each slot 9, with the length of the toothed surface 91 aligned with the length of the corresponding slot 9.

[0063] Referring to Figures 4 and 5, two limiting gears 10 are rotatably connected to the box body 31. The two limiting gears 10 are located at one end of the box body 31 close to the end cover 322 and are located in the accommodating groove 311, and the two limiting gears 10 are arranged in a one-to-one correspondence with the two slide grooves 9. Each limiting gear 10 is located in the corresponding slide groove 9, and each limiting gear 10 is engaged with the tooth surface 91 on the inner wall of the corresponding slide groove 9. The rotation axis of the limiting gear 10 is set perpendicular to the length direction of the corresponding slide groove 9.

[0064] 5 , the rotation axis of each limiting gear 10 passes through the housing 31 in a direction away from the plate 321. A positioning block 11 is fixed to the rotation axis of each limiting gear 10. The positioning block 11 is located at the end of the rotation axis of the limiting gear 10 away from the limiting gear 10 and is located on the outside of the housing 31. The positioning block 11 abuts against the outer wall of the housing 31. A positioning groove 111 is provided on the outer wall of the positioning block 11. The positioning groove 111 passes through the positioning block 11 along the rotation axis of the limiting gear 10. When the plate 321 slides in the accommodating groove 311, due to the meshing of the limiting gear 10 and the tooth surface 91, the plate 321 slides and drives the two limiting gears 10 to rotate, thereby driving the two positioning blocks 11 to rotate. When the end cover 322 abuts against the housing 31, the positioning groove 111 is located on the side of the positioning block 11 close to the end cover 322.

[0065] Referring to Figures 6 and 7 , two limiting cavities 3221 are defined within the end cap 322, corresponding one-to-one with the two positioning blocks 11. Two positioning members 12 are slidably connected to the end cap 322, corresponding one-to-one with the two limiting cavities 3221. Each positioning member 12 includes a sliding portion 121 and a limiting portion 122. The sliding portion 121 is disposed through the end cap 322 and slidably connected thereto. The sliding direction of the sliding portion 121 is parallel to the sliding direction of the plate body 321, and opposite ends of the sliding portion 121 extend beyond the end cap 322. The ends of the sliding portions 121, which are located near the positioning blocks 11 (see Figure 5), engage with the corresponding positioning slots 111 (see Figure 5). The limiting portion 122 is located within the corresponding limiting cavity 3221 and is fixedly connected to the sliding portion 121.

[0066] 5 and 7 , an elastic member 13 is sleeved on the outside of the sliding portion 121. The elastic member 13 is located within the limiting cavity 3221 and on the side of the limiting portion 122 away from the positioning block 11. The end of the elastic member 13 close to the limiting portion 122 abuts against the limiting portion 122, while the end of the elastic member 13 away from the limiting portion 122 abuts against the inner wall of the limiting cavity 3221 away from the positioning block 11, thereby abutting the limiting portion 122 against the inner wall of the limiting cavity 3221 close to the positioning block 11. In this embodiment, the elastic member 13 is a spring.

[0067] When the cam 32 is in the unlocked position, the locking cam 322 is in the unlocked position, and the locking cam 323 is in the unlocked position, so that the cam 323 is locked in the unlocked position.

[0068] 2 and 6 , a baffle 14 is also fixed to the plate body 321. The baffle 14 is located on the side of the plate body 321 that is close to the box body 31 and on the side of the plate body 321 that is away from the end cover 322. The baffle 14 is located at the end of the plate body 321 that is close to the discharge roller 2 and is arranged horizontally. The baffle 14 is installed in a direction away from the plate body 321, passing through the box body 31 and the frame 1.

[0069] When the drawer plate 32 slides away from the box body 31, the drawer plate 32 drives the baffle 14 to move out so that the baffle 14 blocks the receiving groove 311, thereby reducing the black sand in the discharge roller 2 from continuing to fall into the receiving groove 311. When the drawer plate 32 slides and is stuck in the receiving groove 311, the drawer plate 32 drives the baffle 14 to move, and the inner wall of the receiving groove 311 pushes the black sand that falls on the baffle 14 into the receiving groove 311 for collection.

[0070] The implementation principle of a pump parts production process in the embodiment of the present application is as follows:

[0071] After the black sand pattern on the surface of the primary part is broken, the primary part is placed in the through hole 21. The unloading roller 2 is driven to rotate by the cooperation of the driving member 43, the driving gear 42 and the transmission gear 41, so that the primary part rolls in the through hole 21. During the rolling process, the scraping strip 5 scrapes off the black sand on the surface of the primary part, and at the same time, the elastic strip 7 scrapes off the small particles of black sand adsorbed on the surface of the primary part. The scraped black sand and its small particles gradually roll down to the discharge port 22 along the scraping strip 5. The smaller black sand is discharged through the discharge port 22. The larger black sand is blocked by the convex strip 6 as the unloading roller 2 rotates and then rises. Then it falls and hits the inner wall of the through hole 21 to be broken, and then discharged through the discharge port 22, thereby realizing the sand removal of the primary part.

[0072] The black sand discharged from the discharge port 22 falls into the containing groove 311 and the through-hole 3211 in sequence. When the black sand in the containing groove 311 is full, the sliding part 121 moves in the direction away from the positioning block 11. The sliding part 121 drives the limiting part 122 to squeeze the elastic part 13 so that the sliding part 121 disengages from the positioning groove 111, and then the draw plate 32 is pulled out to make the black sand in the through-hole 3211 fall out, so that the black sand can be taken out and recycled. The recycled black sand can be reused, reducing material waste.

[0073] After all the black sand is taken out, the end cover 322 is moved toward the box body 31 so that the end cover 322 abuts against the box body 31. At this time, the positioning groove 111 is toward the end cover 322, and the sliding part 121 is loosened so that the sliding part 121 is stuck in the positioning groove 111. The positioning of the draw plate 32 on the box body 31 can be achieved, and the black sand falling from the discharge roller 2 can continue to be collected.

[0074] The production process of the present application utilizes coated sand and black sand to prepare parts, which reduces the wax melting and roasting processes in the investment casting process, simplifies the process, shortens the production cycle, thereby improving the production efficiency of parts and components, and reduces the energy consumed by wax melting and roasting, which has the effect of energy saving and emission reduction. Compared with wax, black sand is not easy to stick to the surface of parts, making sand cleaning more convenient, thereby further improving the production efficiency of parts and components, and facilitating the mass production of parts and components.

[0075] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A production process for pump parts, It is characterized in that The following steps are involved: a. Preparation of molding sand model: prepare the molding sand upper mold and the molding sand lower mold according to the size design requirements of the parts drawing, and assemble the molding sand upper mold and the molding sand lower mold to obtain the molding sand model; b. Preparation of black sand model: design and prepare a black sand upper mold and a black sand lower mold according to the size requirements of the molding sand model, place the molding sand model in the black sand lower mold, and place the casting filter in the flow channel of the black sand lower mold, and then assemble the black sand upper mold and the black sand lower mold to obtain the black sand model; c. Pouring: Pour the molten iron into the black sand mold through the pouring port on the black sand mold, and cool it to obtain the initial parts; d. Sand removal: Break the black sand pattern on the surface of the primary parts, and then place the primary parts on the conveyor belt and transport them to the unloading device for sand removal; e. Recovery: Collect the crushed black sand and the black sand falling from the unloading device; f. Surface treatment: The initial parts after sand removal in the unloading device are taken out for grinding and polishing to obtain finished parts; The unloading device comprises a frame (1) and a unloading roller (2) rotatably connected to the frame (1), the unloading roller (2) being provided with a through hole (21), the outer wall of the unloading roller (2) being provided with a plurality of discharge ports (22), the plurality of discharge ports (22) being located at one end of the unloading roller (2) and being circumferentially distributed along the rotation axis of the unloading roller (2), the inner wall of the through hole (21) being provided with a plurality of scraping strips (5), the plurality of scraping strips (5) being located at one side of the discharge port (22), the plurality of scraping strips (5) being distributed along the rotation direction of the unloading roller (2) in a direction close to the discharge port (22), and each of the scraping strips (5) being inclined along the rotation direction of the unloading roller (2) in a direction close to the discharge port (22), and the frame (1) being provided with a driving component (4) for driving the unloading roller (2) to rotate; A plurality of convex strips (6) are also provided on the inner wall of the through hole (21), and the plurality of convex strips (6) are circumferentially spaced along the rotation axis of the discharge roller (2), and the length direction of the convex strips (6) is arranged parallel to the rotation axis of the discharge roller (2), and the plurality of convex strips (6) are all located in the area where the discharge port (22) is provided on the discharge roller (2); A plurality of elastic strips (7) are also fixed on the inner wall of the through hole (21); the plurality of elastic strips (7) are located on a side of the discharge port (22) close to the scraper strip (5) and are arranged alternately with the scraper strip (5); and the plurality of elastic strips (7) are distributed circumferentially along the rotation axis of the discharge roller (2); and the length of each elastic strip (7) is less than the thickness of the scraper strip (5).

2. The process for producing pump parts according to claim 1, Features: The frame (1) is provided with a material receiving box (3), and the material receiving box (3) is located below the discharge roller (2). The material receiving box (3) comprises a box body (31) provided on the frame (1) and a drawer plate (32) slidably connected to the box body (31). The end surface of the box body (31) close to the discharge roller (2) is provided with a receiving groove (311), and the receiving groove (311) is located below the discharge port (22). The drawer plate (32) is located on one side of the box body (31) and is slidably connected to the receiving groove (311), and the drawer plate (32) slides close to or away from the box body (31). A through hole (3211) is vertically provided on the drawer plate (32), and the through hole (3211) is connected to the receiving groove (311).

3. The process for producing pump parts according to claim 2, Features: A sliding groove (9) is provided on the outer wall of the draw plate (32); a limit gear (10) is rotatably connected to the box body (31); the limit gear (10) is located in the sliding groove (9); a tooth surface (91) is provided on an inner wall of the sliding groove (9) along the sliding direction of the draw plate (32); the limit gear (10) meshes with the tooth surface (91).

4. The process for producing pump parts according to claim 3, Features: The draw plate (32) comprises a plate body (321) slidably connected to the accommodating groove (311) and an end cover (322) arranged on the plate body (321); the through hole (3211) and the slide groove (9) are arranged on the plate body (321); the end cover (322) is located outside the box body (31) and abuts against the box body (31); a positioning block (11) is arranged on the rotating shaft of the limit gear (10); the positioning block (11) 1) is located on the outer side of the box body (31), the positioning block (11) is provided with a positioning groove (111), when the end cover (322) is in contact with the box body (31), the positioning groove (111) is located on a side of the positioning block (11) close to the end cover (322), the end cover (322) is slidably connected with a positioning member (12), the positioning member (12) is slidably inserted into the positioning groove (111) and positions the end cover (322).

5. The process for producing pump parts according to claim 4, Features: A limited position cavity (3221) is provided in the end cover (322); the positioning member (12) comprises a sliding portion (121) slidably connected to the end cover (322) and a limited position portion (122) arranged on the sliding portion (121); the limited position portion (122) is located in the limited position cavity (3221); the positioning groove (111) is provided for the sliding portion (121) to be inserted into; an elastic member (13) is provided on the sliding portion (121); opposite ends of the elastic member (13) are respectively pressed against the limited position portion (122) and the inner wall of the limited position cavity (3221); the elastic member (13) enables the sliding portion (121) to have a tendency to be inserted into the positioning groove (111).

6. The process for producing pump parts according to claim 2, Features: The draw plate (32) is provided with a baffle (14), the baffle (14) is located on a side of the draw plate (32) close to the box body (31), and the baffle (14) penetrates the box body (31) and the frame (1).

7. The process for producing pump parts according to claim 1, Features: The driving assembly (4) comprises a transmission gear (41) arranged on the discharge roller (2), a driving gear (42) rotatably connected to the frame (1), and a driving member (43) arranged on the frame (1); the transmission gear (41) and the driving gear (42) are meshed, and the driving member (43) drives the driving gear (42) to rotate.

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