A temperature control device for manufacturing sand cores

Abstract

The utility model relates to foundry technology field, concretely relates to a temperature control device for making sand core, including base, the base is supported with the frame body, the base is equipped with the cylinder of driving hot core box to lift, hot core box top is equipped with the shooting cylinder, the shooting cylinder bottom is connected with the shooting nozzle that can insert hot core box, the shooting cylinder top is connected with the feed pipe that extends vertically upwards through the frame body top, the end of feed pipe is connected with the material conveying spare of conveying core sand mixture, the material conveying spare sets up in the frame body top, the lateral surface of feed pipe is set up with the air inlet along its radial direction, the air inlet is connected with the gas conveying spare of conveying pressure gas, the outer surface of shooting cylinder is equipped with the cooling structure for cooling shooting cylinder and shooting nozzle together. The utility model can cool shooting cylinder and shooting nozzle, avoid the core sand mixture in shooting cylinder and shooting nozzle and heat hardening and produce the jam of blocking.

Description

TECHNICAL FIELD

[0001] The utility model relates to foundry technology field, concretely relates to a temperature control device for manufacturing sand core. BACKGROUND

[0002] Sand core is a key component in foundry (especially sand mold casting), which is specially used to form holes, cavities, internal passages or complex shapes in the castings, and these shapes cannot or are difficult to be directly realized by the external modeling of the mold. Simply speaking, sand core is an internal model with accurate shape made of special sand, when the molten metal is poured into the cavity composed of the outer mold (sand mold) and sand core, the metal will wrap the sand core, and after the metal cools and solidifies, the sand core is destroyed and removed, thus the casting with the required internal shape is obtained, so the manufacturing of sand core is an important link in the production process of castings.

[0003] When manufacturing sand core, a core shooter is usually used, and the working principle of the core shooter is that the core sand mixture with liquid or solid thermosetting resin as binder is shot into a hot core box through a sand shooting mechanism, and the core sand mixture is quickly hardened to a certain thickness in the hot core box, and then the high-quality sand core product with smooth surface and accurate size is formed.

[0004] In order to shoot the core sand mixture into the hot core box, the sand shooting mechanism in the core shooter mainly includes a hopper, a shooting barrel and a nozzle communicating with the bottom of the shooting barrel. The hopper is used to store the core sand mixture, and when the core sand mixture is to be shot into the hot core box, a certain amount of core sand mixture is added into the shooting barrel through the hopper, then the shooting barrel is closed and the nozzle is inserted into the hot core box, and then the core sand mixture in the shooting barrel is shot into the hot core box through the nozzle by introducing pressure air into the shooting barrel.

[0005] When the core sand mixture is shot into the hot core box by the sand shooting mechanism, since the shooting barrel and the nozzle in the sand shooting mechanism are located above the hot core box and are close to the hot core box, when the hot core box is in a heating state, the hot air around the hot core box rises and heats the shooting barrel and the nozzle, thereby heating the core sand mixture in the shooting barrel and the nozzle, which causes the core sand mixture to start hardening, reducing the flowability of the core sand mixture, especially the part of the nozzle closest to the hot core box is most affected by the hot air, and when the core sand mixture in the part of the nozzle starts to harden, the nozzle will be blocked, directly causing the failure of sand shooting. UTILITY MODEL CONTENTS

[0006] The utility model intends to provide a temperature control device for manufacturing sand core, which can cool the shooting barrel and the nozzle, and avoid the hardening of the core sand mixture in the shooting barrel and the nozzle due to heating.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0008] 1. A temperature control device for manufacturing sand cores, characterized in that it comprises a base on which a frame is arranged, a cylinder is fixed on the upper surface of the base and located in the frame, the cylinder has a piston rod extending towards the top of the frame, the free end of the piston rod is connected with a fixed plate, the upper surface of the fixed plate is provided with a hot core box, the top of the hot core box is provided with a sand inlet hole, a shot barrel is arranged above the hot core box, the bottom of the shot barrel is provided with a sand shooting hole facing the sand inlet hole, the sand shooting hole is communicated with a sand shooting nozzle which can be inserted into the sand inlet hole, the top of the shot barrel is provided with a feeding port, the feeding port is communicated with a feeding pipe which vertically extends upwards through the top of the frame, the end of the feeding pipe is communicated with a material conveying member for conveying core sand mixture, the material conveying member is arranged on the top of the frame, the side surface of the feeding pipe is provided with an air inlet hole in the radial direction, the air inlet hole is communicated with an air conveying member for conveying pressure gas, and the outer surface of the shot barrel is sleeved with a cooling structure for cooling the shot barrel and the sand shooting nozzle together.

[0009] In the utility model, the material conveying member conveys the core sand mixture, in the process of conveying the core sand mixture by the material conveying member, the core sand mixture enters the shot barrel through the feeding pipe communicated with the material conveying member, until a certain amount of core sand mixture is in the shot barrel, the material conveying member stops conveying the core sand mixture, then the piston rod is controlled to ascend by the cylinder, in the process of ascending of the piston rod, the piston rod drives the fixed plate to ascend, in the process of ascending of the fixed plate, the fixed plate drives the hot core box to ascend, until the sand inlet hole in the top of the hot core box is inserted by the sand shooting nozzle in the bottom of the shot barrel, then the air conveying member conveys the pressure gas, in the process of conveying the pressure gas by the air conveying member, the pressure gas enters the feeding pipe through the air inlet hole communicated with the air conveying member, then the pressure gas enters the shot barrel along the feeding pipe, the core sand mixture in the shot barrel is extruded by the pressure gas and is shot into the hot core box from the sand shooting nozzle, after the core sand mixture is heated and hardened to form the sand core product in the hot core box, the air conveying member stops conveying the pressure gas, at this time, the core sand mixture is not extruded by the pressure gas and is not shot into the hot core box from the sand shooting nozzle, at the same time, the hot core box is reset by controlling the piston rod to descend by the cylinder, so that the sand shooting nozzle is separated from the sand inlet hole, after the hot core box is naturally cooled, the sand core product in the hot core box is taken out by the operator, then the material conveying member replenishes the core sand mixture into the shot barrel, and the above process is repeated.

[0010] In the above process, the cooling structure sleeved on the outer surface of the shot barrel can cool the shot barrel and the sand shooting nozzle, so that the shot barrel and the sand shooting nozzle are not affected by the hot air around the hot core box and are not heated, thereby avoiding that the core sand mixture in the shot barrel and the sand shooting nozzle is heated and hardened to cause blockage.

[0011] 2. The temperature control device for manufacturing sand cores according to 1, wherein:

[0012] The feeding member comprises a hopper for storing core sand mixture, the hopper is arranged at the top of the frame body, a feeding pipe extending towards the feeding pipe is communicated with the bottom end of the hopper, the end of the feeding pipe is communicated with the feeding pipe, and a feeding control valve is arranged on the feeding pipe.

[0013] In the utility model, when the feeding control valve is opened, the core sand mixture stored in the hopper falls into the feeding pipe under the action of gravity, and then falls into the shooting pot through the feeding pipe, until the shooting pot contains a certain amount of core sand mixture, and then the control valve is closed to stop the core sand mixture from continuously falling into the shooting pot.

[0014] 3) The temperature control device for manufacturing sand cores according to 1), wherein:

[0015] The gas feeding member comprises a pressure gas tank for storing pressure gas, the pressure gas tank has a gas feeding pipe extending towards the gas inlet hole, the end of the gas feeding pipe is communicated with the gas inlet hole, and a gas feeding control valve is arranged on the gas feeding pipe.

[0016] In the utility model, when the gas feeding control valve is opened, the pressure gas in the pressure gas tank enters the gas inlet hole through the gas feeding pipe, then enters the feeding pipe through the gas inlet hole, and finally enters the shooting pot along the feeding pipe, so that the core sand mixture in the shooting pot is extruded by the pressure gas and is shot into the hot core box from the nozzle, and when the gas feeding control valve is closed, the pressure gas stops entering the shooting pot, and the core sand mixture is no longer extruded by the pressure gas and is shot into the hot core box from the nozzle.

[0017] 4) The temperature control device for manufacturing sand cores according to 1), wherein:

[0018] The cooling structure comprises a cooling sleeve which can reciprocate along the axial direction of the shooting pot, the cooling sleeve is sleeved on the outer surface of the shooting pot, a water pipe is arranged in the cooling sleeve, a cold water machine for preparing cold water is arranged on one side of the frame body, one end of the water pipe is communicated with a water inlet hose extending towards the cold water machine, the other end of the water pipe is communicated with a water outlet hose extending towards the cold water machine, the end of the water inlet hose and the end of the water outlet hose are both communicated with the cold water machine, and a liquid pump is arranged on the water outlet hose.

[0019] In the process of continuously manufacturing sand cores, the hot core box is switched between heating and natural cooling states, and in the two states of the hot core box, the heat in the hot core box is continuously dissipated to the periphery, continuously generating rising hot air.

[0020] Since the cooling jacket can block most of the hot air, direct contact of the hot air with the shooting barrel and the shooting nozzle located above the hot core box is basically avoided, and the shooting barrel and the shooting nozzle are heated to a certain extent to avoid the influence of the hot air.

[0021] Since the cooling jacket can block most of the hot air, direct contact of the hot air with the shooting barrel and the shooting nozzle located above the hot core box is basically avoided, and the shooting barrel and the shooting nozzle are heated to a certain extent to avoid the influence of the hot air.

[0022] 5) The temperature control device for manufacturing sand cores according to 4), wherein:

[0023] The cooling jacket is provided with an upper opening for the feeding pipe to pass through, and a lower opening for the shooting nozzle to pass through, and a space is left between the inner bottom surface of the cooling jacket and the lower surface of the shooting barrel, and two springs are symmetrically arranged in the space, and the two ends of the spring are connected with the inner bottom surface of the cooling jacket and the lower surface of the shooting barrel respectively.

[0024] In the utility model, since the cooling jacket has the upper opening for the feeding pipe to pass through and the lower opening for the shooting nozzle to pass through, and a space is left between the inner bottom surface of the cooling jacket and the lower surface of the shooting barrel, the cooling jacket can reciprocate along the axis direction of the shooting barrel.

[0025] When the piston rod of the cylinder drives the hot core box to ascend, the cooling jacket is pushed by the hot core box to move upward along the axis direction of the shooting pot, and in the process of moving upward of the cooling jacket, the spring between the inner bottom surface of the cooling jacket and the lower surface of the shooting pot is contracted under the upward pushing force of the cooling jacket, and when the piston rod of the cylinder drives the hot core box to descend and reset, the cooling jacket moves downward along the axis direction of the shooting pot under the weight to return to the initial position, and in the process of moving downward of the cooling jacket, the pushing force of the cooling jacket to the spring disappears, and the spring is elongated to return to the initial state under the action of the elastic potential energy.

[0026] In the process of moving upward of the cooling jacket, the bottom end of the nozzle can pass through the lower opening and insert into the sand hole, so that the nozzle can shoot the core sand mixture into the hot core box through the sand hole, and in the process of moving downward of the cooling jacket, the bottom end of the nozzle returns to the cooling jacket to be cooled, avoiding the hardening of the core sand mixture in the nozzle due to heat.

[0027] 6) The temperature control device for manufacturing sand cores according to 4), wherein:

[0028] The water pipe comprises a circular ring pipe segment and a spiral pipe segment extending spirally along the axis direction of the shooting pot, the circular ring pipe segment is arranged in the inside of the cooling jacket along the circumference of the lower opening, the circular ring pipe segment is in the shape of a circular ring, the circular ring pipe segment is symmetrically connected with a first straight pipe segment and a second straight pipe segment extending radially along the cooling jacket, the end of the first straight pipe segment passes through the cooling jacket and communicates with the water inlet hose, and the end of the second straight pipe segment communicates with the spiral pipe segment.

[0029] In the utility model, cold water is prepared by the cold water machine, then the liquid pumping pump is opened, and the cold water prepared by the cold water machine can pass through the first straight pipe segment, the circular ring pipe segment, the second straight pipe segment and the spiral pipe segment in the inside of the cooling jacket in turn through the water inlet hose, then enter the water outlet hose through the spiral pipe segment, and then return to the cold water machine through the water outlet hose.

[0030] Since the first straight pipe segment, the circular ring pipe segment, the second straight pipe segment and the spiral pipe segment are arranged in the cooling jacket along the shape of the shooting pot and the nozzle, and the cold water flows from bottom to top, the cold water can fully fill the first straight pipe segment, the circular ring pipe segment, the second straight pipe segment and the spiral pipe segment, the heat exchange between the shooting pot, the nozzle, the cooling jacket and the cold water is more sufficient, the shooting pot and the nozzle can maintain a lower temperature, and the hardening of the core sand mixture in the nozzle and the shooting pot due to heat is avoided.

[0031] Compared with the prior art, the utility model also has the following technical effects:

[0032] The utility model discloses can through the control feed control valve to the inside of the barrel of the core sand mixture, then through the cylinder can drive hot core box to go up, make the nozzle insert into the sand hole, when through the control inlet control valve can be passed into the pressure gas to the inside of the barrel, make the core sand mixture from the nozzle shoot into the hot core box, after the core sand mixture heats hardens to form the sand core finished product in the hot core box, through the inlet control valve stops passing into the pressure gas to the inside of the barrel, simultaneously through the cylinder drive hot core box reset, make the nozzle separate from the sand hole, after the hot core box natural cooling by the operator takes out the sand core finished product in the hot core box, then repeats the above-mentioned process to carry out the manufacture production of sand core.

[0033] Through the cooling water circulation loop formed by the water cooler, liquid pump, water inlet hose, first straight pipe section, circular ring pipe section, second straight pipe section, spiral pipe section and water outlet hose, the energy consumption can be reduced while the cooling jacket always keeps a lower temperature, so that the barrel and the nozzle in the cooling jacket keep a lower temperature, avoiding the core sand mixture in the barrel and the nozzle from being heated and hardened to cause blockage.

[0034] The other advantages, objects and features of the utility model will be set forth in the subsequent specification in part, and in part will be obvious to those skilled in the art based on the study of the following, or can be taught from the practice of the utility model. The objects and other advantages of the utility model can be realized and obtained by the following description. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is cross section schematic view of the utility model for manufacturing sand core's temperature control device;

[0036] Figure 2 It is the schematic diagram of water pipe in the utility model for manufacturing sand core's temperature control device;

[0037] Figure 3 It is Figure 2 The cross section schematic view of A-A plane in the utility model.

[0038] The reference signs in the drawings of the specification include: base 1, frame body 2, cylinder 3, fixed plate 4, hot core box 5, sand hole 6, barrel 7, nozzle 8, feed pipe 9, hopper 10, feed pipe 11, feed control valve 12, pressure gas tank 13, gas pipe 14, gas control valve 15, cooling jacket 16, water pipe 17, water cooler 18, water inlet hose 19, water outlet hose 20, liquid pump 21, lower opening 22, spring 23, circular ring pipe section 24, spiral pipe section 25, first straight pipe section 26, second straight pipe section 27. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0041] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0042] In the above description of the present application, it should be noted that the orientation or position relationship indicated by the terms "one side", "the other side" and the like is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0043] In addition, the term "same" and other terms do not mean that the components must be absolutely the same, but there can be slight differences. The term "vertical" only means that the position relationship between the components is relatively more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly inclined.

[0044] Embodiment, see Figure 1 , Figure 2 and Figure 3As shown, the embodiment is a temperature control device for manufacturing sand core, which comprises a base 1, a frame 2 arranged on the base 1, a cylinder 3 fixed on the upper surface of the base 1 in the frame 2, the cylinder 3 having a piston rod extending towards the top of the frame 2, the free end of the piston rod being connected with a fixed plate 4 through bolts, the upper surface of the fixed plate 4 being fixed with a hot core box 5 through bolts, the top of the hot core box 5 being provided with a sand inlet hole 6, a barrel 7 being arranged above the hot core box 5, the bottom of the barrel 7 being provided with a sand shooting hole towards the sand inlet hole 6, the sand shooting hole being communicated with a sand shooting nozzle 8 which can be inserted into the sand inlet hole 6, the top of the barrel 7 being provided with a feeding port, the feeding port being communicated with a feeding pipe 9 extending vertically upwards through the top of the frame 2, the end of the feeding pipe 9 being communicated with a material conveying element for conveying core sand mixture, the material conveying element being arranged on the top of the frame 2, the side of the feeding pipe 9 being provided with an air inlet hole along the radial direction thereof, the air inlet hole being communicated with a gas conveying element for conveying pressure gas, and the outer surface of the barrel 7 being sleeved with a cooling structure for cooling the barrel 7 and the sand shooting nozzle 8 together.

[0045] In the embodiment, the core sand mixture is conveyed by the material conveying element, in the process of conveying the core sand mixture by the material conveying element, the core sand mixture enters the barrel 7 through the feeding pipe 9 communicated with the material conveying element, until a certain amount of core sand mixture is in the barrel 7, the material conveying element stops conveying the core sand mixture, then the piston rod is controlled to rise by the cylinder 3, in the process of rising of the piston rod, the fixed plate 4 is driven to rise by the piston rod, in the process of rising of the fixed plate 4, the hot core box 5 is driven to rise by the fixed plate 4, until the sand inlet hole 6 at the top of the hot core box 5 is inserted by the sand shooting nozzle 8 at the bottom of the barrel 7, then the pressure gas is conveyed by the gas conveying element, in the process of conveying the pressure gas by the gas conveying element, the pressure gas enters the feeding pipe 9 through the air inlet hole communicated with the gas conveying element, then the pressure gas enters the barrel 7 along the feeding pipe 9, so that the core sand mixture in the barrel 7 is extruded by the pressure gas and shot into the hot core box 5 from the sand shooting nozzle 8, after the core sand mixture is heated and hardened to form a sand core product in the hot core box 5, the gas conveying element stops conveying the pressure gas, at this time, the core sand mixture is no longer extruded by the pressure gas and shot into the hot core box 5 from the sand shooting hole 8, at the same time, the hot core box 5 is reset by controlling the piston rod to descend by the cylinder 3, so that the sand shooting nozzle 8 is separated from the sand inlet hole 6, the sand core product in the hot core box 5 is taken out by the operator, then the core sand mixture is supplemented into the barrel 7 by the material conveying element, and the above process is repeated.

[0046] In the above process, the barrel 7 and the sand shooting nozzle 8 can be cooled by the cooling structure sleeved on the outer surface of the barrel 7, so as to avoid the barrel 7 and the sand shooting nozzle 8 being heated and rising by the hot air around the hot core box 5, thereby avoiding the core sand mixture in the barrel 7 and the sand shooting nozzle 8 being heated and hardened to cause blockage.

[0047] The feeding member includes a hopper 10 for storing core sand mixture, the hopper 10 is arranged on the top of the frame body 2, the bottom end of the hopper 10 is communicated with a feeding pipe 11 extending towards the feeding pipe 9, the end of the feeding pipe 11 is communicated with the feeding pipe 9, and the feeding pipe 11 is provided with a feeding control valve 12.

[0048] In the embodiment, by opening the feeding control valve 12, the core sand mixture stored in the hopper 10 falls into the feeding pipe 9 from the feeding pipe 11 under the action of gravity, and then falls into the shot sleeve 7 through the feeding pipe 9, until the shot sleeve 7 has a certain amount of core sand mixture, the core sand mixture stops falling into the shot sleeve 7 by closing the control valve. By controlling the feeding control valve 12, the operator can avoid manually supplementing the core sand mixture into the shot sleeve 7 frequently, and only needs to add a sufficient amount of core sand mixture into the hopper 10 at one time to meet the production demand for a period of time.

[0049] The gas feeding member includes a pressure gas tank 13 for storing pressure gas, the pressure gas tank 13 has a gas feeding pipe 14 extending towards the gas inlet hole, the end of the gas feeding pipe 14 is communicated with the gas inlet hole, and the gas feeding pipe 14 is provided with a gas feeding control valve 15.

[0050] In the embodiment, by opening the gas feeding control valve 15, the pressure gas in the pressure gas tank 13 enters the gas inlet hole through the gas feeding pipe 14, then enters the feeding pipe 9 through the gas inlet hole, and finally enters the shot sleeve 7 along the feeding pipe 9, so that the core sand mixture in the shot sleeve 7 is extruded by the pressure gas and shot into the hot core box 5 from the nozzle 8, and by closing the gas feeding control valve 15, the pressure gas stops entering the shot sleeve 7, and the core sand mixture is no longer extruded by the pressure gas and shot into the hot core box 5 from the nozzle 8.

[0051] The cooling structure includes a cooling sleeve 16 which can reciprocate along the axis direction of the shot sleeve 7, the cooling sleeve 16 is sleeved on the outer surface of the shot sleeve 7, a water pipe 17 is arranged in the cooling sleeve 16, one side of the frame body 2 is provided with a cold water machine 18 for preparing cold water, one end of the water pipe 17 is communicated with a water inlet hose 19 extending towards the cold water machine 18, the other end of the water pipe 17 is communicated with a water outlet hose 20 extending towards the cold water machine 18, the end of the water inlet hose 19 and the end of the water outlet hose 20 are both communicated with the cold water machine 18, and the water outlet hose 20 is provided with a liquid pump 21.

[0052] In the embodiment, in the process of continuously manufacturing sand cores, the hot core box 5 is constantly switched between heating and natural cooling states, in these two states of the hot core box 5, the heat in the hot core box 5 is constantly dissipated to the surrounding, continuously generating rising hot air, since the cooling sleeve 16 is sleeved on the outer surface of the shot sleeve 7, the cooling sleeve 16 can block most of the hot air, basically avoiding the hot air directly contacting the shot sleeve 7 and the nozzle 8 located above the hot core box 5, to a certain extent, avoiding the shot sleeve 7 and the nozzle 8 being affected by the hot air and being heated.

[0053] Since the hot air continuously rises around the hot core box 5 during the continuous production of the sand core, the cold water machine 18 is started to prepare cold water and the liquid pump 21 is started to make the cold water prepared by the cold water machine 18 enter the water pipe 17 through the water inlet hose 19. When the cold water passes through the water pipe 17, the heat in the cooling jacket 16 is transferred to the cold water in the water pipe 17, so that the cooling jacket 16 maintains a lower temperature. Then the cold water enters the water outlet hose 20 through the water pipe 17, and is recovered to the cold water machine 18 from the water outlet hose 20, forming a cooling water circulation loop. The cooling jacket 16 maintains a lower temperature through the cooling water circulation loop, so that the barrel 7 and the nozzle 8 in contact with the cooling jacket 16 maintain a lower temperature, effectively avoiding the hardening of the core sand mixture in the barrel 7 and the nozzle 8 due to heat, and through the cooling water circulation loop, the cold water flowing through the water pipe 17 can be recovered to the cold water machine 18 for reuse, saving water.

[0054] Since the cooling jacket 16 can reciprocate along the axis direction of the barrel 7, when the piston rod of the cylinder 3 drives the hot core box 5 to rise, the cooling jacket 16 is pushed by the hot core box 5 to move upward along the axis direction of the barrel 7, so that the bottom end of the nozzle 8 is separated from the cooling jacket 16 and can be inserted into the sand hole 6, so that the nozzle 8 can shoot the core sand mixture into the hot core box 5 through the sand hole 6. When the piston rod of the cylinder 3 drives the hot core box 5 to descend and reset, the cooling jacket 16 moves downward along the axis direction of the barrel 7 under the action of gravity and returns to the initial position, and the bottom end of the nozzle 8 returns to the cooling jacket 16 and is cooled, avoiding the hardening of the core sand mixture in the nozzle 8 due to heat.

[0055] The cooling jacket 16 is provided with an upper opening through which the feeding pipe 9 passes, and a lower opening 22 through which the nozzle 8 passes. A space is left between the inner bottom surface of the cooling jacket 16 and the lower surface of the barrel 7, and two springs 23 are symmetrically arranged in the space.

[0056] In this embodiment, since the cooling jacket 16 has the upper opening through which the feeding pipe 9 passes and the lower opening 22 through which the nozzle 8 passes, and a space is left between the inner bottom surface of the cooling jacket 16 and the lower surface of the barrel 7, the cooling jacket 16 can reciprocate along the axis direction of the barrel 7.

[0057] When the piston rod of the cylinder 3 drives the hot core box 5 to rise, the cooling jacket 16 is pushed by the hot core box 5 to move along the axis direction of the barrel 7, and in the process of the movement of the cooling jacket 16, the spring 23 between the inner bottom surface of the cooling jacket 16 and the lower surface of the barrel 7 is contracted by the upward pushing force of the cooling jacket 16, and when the piston rod of the cylinder 3 drives the hot core box 5 to descend and reset, the cooling jacket 16 is moved downward along the axis direction of the barrel 7 to the initial position by the gravity, and in the process of the movement of the cooling jacket 16, the pushing force of the cooling jacket 16 to the spring 23 disappears, and the spring 23 is elongated to the initial state by the elastic potential energy.

[0058] In the process of the movement of the cooling jacket 16, the bottom end of the nozzle 8 can pass through the lower opening 22 and insert into the sand hole 6, so that the nozzle 8 can shoot the core sand mixture into the hot core box 5 through the sand hole 6, and in the process of the movement of the cooling jacket 16, the bottom end of the nozzle 8 returns to the cooling jacket 16 to be cooled, avoiding the hardening of the core sand mixture in the nozzle 8 due to heat, and in the process of the elongation of the spring 23 to the initial state by the elastic potential energy, the spring 23 pushes the cooling jacket 16 downward, which helps the cooling jacket 16 to quickly return to the initial position by the gravity of the cooling jacket 16, so that the bottom end of the nozzle 8 quickly returns to the cooling jacket 16 to be cooled, further avoiding the hardening of the core sand mixture in the nozzle 8 due to heat.

[0059] The water pipe 17 includes a circular ring pipe segment 24 and a spiral pipe segment 25 extending along the axis direction of the barrel 7 in a spiral shape, the circular ring pipe segment 24 is arranged in the inside of the cooling jacket 16 along the circumference of the lower opening 22, the circular ring pipe segment 24 is in a circular ring shape, the circular ring pipe segment 24 is symmetrically connected with a first straight pipe segment 26 and a second straight pipe segment 27 extending along the radial direction of the cooling jacket 16, the end of the first straight pipe segment 26 passes through the cooling jacket 16 and is connected with the water inlet hose 19, the end of the second straight pipe segment is connected with the spiral pipe segment 25, and the end of the spiral pipe segment 25 passes through the cooling jacket 16 and is connected with the water outlet hose 20.

[0060] In this embodiment, the cold water machine 18 is used to prepare cold water, and then the liquid pump 21 is started, so that the cold water prepared by the cold water machine 18 passes through the first straight pipe segment 26, the circular ring pipe segment 24, the second straight pipe segment 27 and the spiral pipe segment 25 in the inside of the cooling jacket 16 in sequence through the water inlet hose 19, and then enters the water outlet hose 20 through the spiral pipe segment 25, and then returns to the cold water machine 18 through the water outlet hose 20.

[0061] Since the first straight pipe section 26, the circular ring pipe section 24, the second straight pipe section 27 and the spiral pipe section 25 are arranged in the cooling jacket 16 along the shapes of the lance 7 and the nozzle 8, and the cold water flows from bottom to top, the cold water can fully fill the first straight pipe section 26, the circular ring pipe section 24, the second straight pipe section 27 and the spiral pipe section 25, so that the heat exchange between the lance 7, the nozzle 8, the cooling jacket 16 and the cold water is more sufficient, so that the lance 7 and the nozzle 8 can keep a lower temperature, and the core sand mixture in the lance 7 and the nozzle 8 is prevented from being hardened and blocked.

[0062] In the embodiment, the core sand mixture can be supplemented into the lance 7 by controlling the feeding control valve 12, then the nozzle 8 is inserted into the sand hole 6 by driving the hot core box 5 to move upward by the air cylinder 3, at this time, the pressure gas is introduced into the lance 7 by controlling the air inlet control valve, so that the core sand mixture is shot into the hot core box 5 from the nozzle 8, after the core sand mixture is hardened in the hot core box 5 to form the sand core product, the pressure gas is stopped from being introduced into the lance 7 by the air inlet control valve, and the hot core box 5 is reset by the air cylinder 3, so that the nozzle 8 is separated from the sand hole 6, after the hot core box 5 is naturally cooled, the sand core product in the hot core box 5 is taken out by the operator, and then the above process is repeated to manufacture and produce the sand core.

[0063] The cooling water circulation loop formed by the cold water machine 18, the liquid pump 21, the water inlet hose 19, the first straight pipe section 26, the circular ring pipe section 24, the second straight pipe section 27, the spiral pipe section 25 and the water outlet hose 20 can reduce the energy consumption while keeping the cooling jacket 16 at a lower temperature, so that the lance 7 and the nozzle 8 in the cooling jacket 16 keep a lower temperature, and the core sand mixture in the lance 7 and the nozzle 8 is prevented from being hardened and blocked.

[0064] The above is only an embodiment of the present application, and the specific technical solutions and / or common knowledge of characteristics in the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

[0065] The above is only an embodiment of the present scheme, and common knowledge such as specific technical solutions and / or characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solutions of the present scheme, a number of modifications and improvements can also be made, which should also be considered as the protection scope of the present scheme, and these will not affect the effect and practicality of the patent implementation. The protection scope claimed by the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A temperature control device for manufacturing sand cores, characterized in that, The device includes a base on which a frame is mounted. A cylinder located within the frame is fixed to the upper surface of the base. The cylinder has a piston rod extending toward the top of the frame. The free end of the piston rod is connected to a fixing plate. A hot core box is provided on the upper surface of the fixing plate. A sand inlet is provided at the top of the hot core box. An injection cylinder is provided above the hot core box. A sand injection hole is provided at the bottom of the injection cylinder, facing the sand inlet. The sand injection hole is connected to a nozzle that can be inserted into the sand inlet. A feed inlet is provided at the top of the injection cylinder. The feed inlet is connected to a feed pipe extending vertically upward through the top of the frame. The end of the feed pipe is connected to a conveying component for conveying the core sand mixture. The conveying component is located at the top of the frame. An air inlet is provided radially on the side of the feed pipe. The air inlet is connected to a gas conveying component for conveying pressurized gas. A cooling structure for jointly cooling the injection cylinder and the nozzle is fitted on the outer surface of the injection cylinder.

2. The temperature control device for manufacturing sand cores according to claim 1, characterized in that: The conveying component includes a hopper for storing core sand mixture. The hopper is located on the top of the frame. The bottom end of the hopper is connected to a conveying pipe extending toward the feed pipe. The end of the conveying pipe is connected to the feed pipe. A conveying control valve is provided on the conveying pipe.

3. The temperature control device for manufacturing sand cores according to claim 1, characterized in that: The gas delivery component includes a pressure tank for storing pressurized gas, the pressure tank having a gas delivery pipe extending toward the air inlet, the end of the gas delivery pipe communicating with the air inlet, and a gas delivery control valve provided on the gas delivery pipe.

4. A temperature control device for manufacturing sand cores according to claim 1, characterized in that: The cooling structure includes a cooling jacket that can reciprocate along the axis of the injection tube. The cooling jacket is fitted onto the outer surface of the injection tube. A water pipe is inserted inside the cooling jacket. A chiller for preparing chilled water is provided on one side of the frame. One end of the water pipe is connected to an inlet hose extending toward the chiller, and the other end of the water pipe is connected to an outlet hose extending toward the chiller. Both the end of the inlet hose and the end of the outlet hose are connected to the chiller. A liquid pump is provided on the outlet hose.

5. A temperature control device for manufacturing sand cores according to claim 4, characterized in that: The cooling jacket has an upper opening at the top for the feed pipe to pass through, and a lower opening at the bottom for the nozzle to pass through. There is a space between the inner bottom surface of the cooling jacket and the lower surface of the injection tube. Two springs are symmetrically arranged in the space, and the two ends of the springs are respectively connected to the inner bottom surface of the cooling jacket and the lower surface of the injection tube.

6. A temperature control device for manufacturing sand cores according to claim 5, characterized in that: The water pipe includes a circular annular pipe section and a spiral pipe section extending spirally along the axis of the injection tube. The circular annular pipe section is arranged circumferentially inside the cooling jacket along the lower opening. The circular annular pipe section is circular in shape. The circular annular pipe section is symmetrically connected to a first straight pipe section and a second straight pipe section extending radially along the cooling jacket. The end of the first straight pipe section passes through the cooling jacket and communicates with the water inlet hose. The end of the second straight pipe section communicates with the spiral pipe section. The end of the spiral pipe section passes through the cooling jacket and communicates with the water outlet hose.

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