Precoated sand mold capable of being stacked and combined

Abstract

The utility model relates to the technical field of precoated sand molds, in particular to a precoated sand mold capable of being stacked and combined, which comprises a plurality of groups of molds, the mold comprises an upper mold and a lower mold which are embedded with each other; an upper mold heating chamber is arranged at the bottom of the upper mold, and a lower mold heating chamber is arranged at the bottom of the lower mold; each of the upper die heating chamber and the lower die heating chamber comprises a metal shell, a thermocouple jack, a temperature measuring hole, a heat conduction constant temperature device and a heat preservation device; the metal shell is consistent with the upper die and the lower die in size and is internally provided with a heat-conducting constant-temperature device; a plurality of groups of thermocouple jacks and temperature measuring holes are formed in the heat-conducting constant-temperature device in a penetrating manner; heat preservation devices are arranged between the metal shell and the heat conduction constant-temperature device and between the thermocouple jack and the temperature measurement hole and the heat conduction constant-temperature device; inserting grooves are formed in four corners of the upper mold heating chamber, and inserting pieces are correspondingly arranged at four corners of the lower mold heating chamber; a heat insulation pad is arranged between the inserting groove and the inserting piece. A plurality of devices are connected side by side and do not interfere with one another, and a plurality of parts are simultaneously produced in batches.

Description

Technical Field

[0001] The utility model relates to the technical field of coated sand moulds, in particular to a coated sand mould which can be stacked and combined. Background Art

[0002] The process of making coated sand cores is to blow the mixed coated sand into the metal mold cavity heated to 250-280℃ under pressure. The phenolic resin is softened and melted by heat conduction, and then solidified. At this time, the sand mold hardens into a shell shape, so it is also called shell mold sand molding. When the outer side of the coated sand mold is heated, the thermocouple is widely used in various industries due to its simple assembly, convenient replacement, good shock resistance, high measurement accuracy, fast thermal response, and good pressure resistance. Thermocouples are commonly used in temperature measuring instruments. Thermocouples can directly measure temperature and convert temperature signals into thermoelectric potential signals, which are converted into the temperature of the measured medium through secondary instruments.

[0003] The difficulty in controlling and instability of the heating efficiency and heating temperature during heating will damage the quality of the coated sand products, and the molds need to be heated separately by different heating devices, and the heating temperature and heating conditions are difficult to unify. Utility Model Content

[0004] In order to overcome the existing deficiencies, the utility model provides a laminated sand mold that can be stacked and combined.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a coated sand mold that can be stacked and combined, comprising several groups of molds; the mold comprises an upper mold and a lower mold that are embedded in each other; an upper mold heating chamber is provided at the bottom of the upper mold, and a lower mold heating chamber is provided at the bottom of the lower mold; the upper mold heating chamber and the lower mold heating chamber comprise a metal shell, a thermocouple jack, a temperature measuring hole, a thermal conductivity constant temperature device and a heat preservation device; the metal shell has the same size as the upper mold and the lower mold, and is provided with a thermal conductivity constant temperature device inside; several groups of thermocouple jacks and temperature measuring holes are arranged through the thermal conductivity constant temperature device; a heat preservation device is provided between the metal shell and the thermal conductivity constant temperature device, and between the thermocouple jacks and the temperature measuring holes and the thermal conductivity constant temperature device; slots are provided at the four corners of the upper mold heating chamber, and plug-ins are provided at the four corners of the lower mold heating chamber correspondingly; a heat insulation pad is provided between the slots and the plug-ins.

[0006] According to another embodiment of the utility model, it further includes: the upper mold surface is provided with an upper mold molding cavity, an ejector pin and a positioning piece, a group of exhaust grooves and two groups of sand shooting ports are provided on the side, and an upper mold heating chamber is provided at the bottom; the middle of the upper mold molding cavity is connected with the sand shooting ports through two groups of runners; the lower mold surface is provided with a lower mold molding cavity, an ejector pin hole and a positioning piece hole corresponding to the upper mold, and a lower mold heating chamber is provided at the bottom.

[0007] According to another embodiment of the utility model, the upper mold cavity is further provided at the center, and an ejector pin and a positioning piece are provided on the inner wall, which correspond to the lower mold cavity, the ejector pin hole and the positioning piece hole.

[0008] According to another embodiment of the utility model, it further includes that four groups of concave blocks are provided at the four corners of the upper mold to match the convex blocks provided at the four corners of the lower mold.

[0009] According to another embodiment of the utility model, further comprising: a filter screen is provided at the sand shooting port.

[0010] According to another embodiment of the utility model, the thermocouple jack and the temperature measuring hole are arranged at intervals, a thermocouple is fixed in the thermocouple jack; a temperature sensor is fixed in the temperature measuring hole; and the thermocouple is electrically connected to the temperature control device.

[0011] According to another embodiment of the utility model, the slot is further provided at the four corners of the metal shell, the highest point is higher than the plane of the metal shell, and a heightening block is provided at the bottom of the plug-in; the height difference between the slot and the plane of the metal shell and the height of the heightening block are consistent with the thickness of the thermal insulation pad.

[0012] The beneficial effect of the utility model is that a plurality of the devices are connected side by side without interfering with each other, a plurality of parts can be produced simultaneously in batches, and the batch temperature can be controlled to maintain stable and consistent quality of the produced products. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a structural diagram of the upper die;

[0016] Figure 3 It is the rear view of the upper die;

[0017] Figure 4 It is the front view of the lower die.

[0018] In the figure, 1, mold, 2, upper mold, 3, lower mold, 4, upper mold heating chamber, 5, lower mold heating chamber, 6, metal shell, 7, thermocouple jack, 8, temperature measuring hole, 9, thermal conductivity constant temperature device, 10, insulation device, 11, slot, 12, plug-in, 13, insulation pad, 14, upper mold cavity, 15, ejector, 16, positioning piece, 17, exhaust groove, 18, sand shooting port, 19, runner, 20, lower mold cavity, 21, ejector hole, 22, positioning piece hole, 23, concave block, 24, convex block, 25, filter screen, 26, thermocouple, 27, temperature sensor, 28, temperature control device, 29, height increasing block. DETAILED DESCRIPTION

[0019] like Figure 1 It is a structural schematic diagram of the utility model, a coated sand mold that can be stacked and combined, including several groups of molds 1; the mold 1 includes an upper mold 2 and a lower mold 3 that are interlocked with each other; an upper mold heating chamber 4 is provided at the bottom of the upper mold 2, and a lower mold heating chamber 5 is provided at the bottom of the lower mold 3; the upper mold heating chamber 4 and the lower mold heating chamber 5 include a metal shell 6, a thermocouple jack 7, a temperature measuring hole 8, a thermal conductivity constant temperature device 9 and a heat preservation device 10; the metal shell 6 is consistent with the size of the upper mold and the lower mold, and a thermal conductivity constant temperature device 9 is provided inside; several groups of thermocouple jacks 7 and temperature measuring holes 8 are arranged through the thermal conductivity constant temperature device 9; a heat preservation device 10 is provided between the metal shell 6 and the thermal conductivity constant temperature device 9, the thermocouple jack 7 and the temperature measuring holes 8 and the thermal conductivity constant temperature device 9; slots 11 are provided at the four corners of the upper mold heating chamber 4, and plug-ins 12 are provided at the four corners of the lower mold heating chamber 5; a heat insulation pad 13 is provided between the slot 11 and the plug-in 12.

[0020] According to another embodiment of the utility model, it further includes: an upper mold molding cavity 14, an ejector pin 15 and a positioning piece 16 are provided on the surface of the upper mold 2, a group of exhaust grooves 17 and two groups of sand shooting ports 18 are provided on the side, and an upper mold heating chamber 4 is provided at the bottom; the middle of the upper mold molding cavity 14 is connected with the sand shooting ports 18 through two groups of runners 19; the surface of the lower mold 3 is provided with a lower mold molding cavity 20, an ejector pin hole 21 and a positioning piece hole 22 corresponding to the upper mold 2, and a lower mold heating chamber 5 is provided at the bottom.

[0021] According to another embodiment of the utility model, the upper mold cavity 14 is further included, and the side is provided with an ejector pin 15 and a positioning piece 16, which correspond to the lower mold cavity 20, the ejector pin hole 21 and the positioning piece hole 22, so that the upper mold 2 and the lower mold 3 fit more closely.

[0022] According to another embodiment of the utility model, the upper mold 2 is further provided with four groups of concave blocks 23 at the four corners to match the convex blocks 24 at the four corners of the lower mold 3, so that the upper mold 2 and the lower mold 3 can be better fitted.

[0023] According to another embodiment of the utility model, a filter screen 25 is further provided at the sand shooting port 18 to filter the raw materials that are too coarse.

[0024] According to another embodiment of the utility model, the thermocouple jack 7 and the temperature measuring hole 8 are arranged at intervals, a thermocouple 26 is fixed in the thermocouple jack 7; a temperature sensor 27 is fixed in the temperature measuring hole 8; and the thermocouple 26 is electrically connected to the temperature control device 28.

[0025] Specifically, heating is performed in the thermocouple jack 7 through the thermocouple 26, and the temperature sensor 27 is used to confirm whether the temperature is balanced, especially the thermal conductivity constant temperature device 9 makes the heating temperature balanced. The insulation device 10 is arranged between the metal shell 6 and the thermal conductivity constant temperature device 9, the thermocouple jack 7 and the temperature measuring hole 8 and the thermal conductivity constant temperature device 9 to prevent temperature overflow and ensure the heating speed and efficiency.

[0026] According to another embodiment of the utility model, it further includes that the slot 11 is arranged at the four corners of the metal shell 6, the highest point is higher than the plane of the metal shell 6, and a heightening block 29 is provided at the bottom of the plug-in 12; the height difference between the slot 11 and the plane of the metal shell 6 and the height of the heightening block 29 are consistent with the thickness of the thermal insulation pad 13, and a gap of the thickness of two groups of thermal insulation pads 13 is left when the slot 11 and the plug-in 12 are plugged in, and the thermal insulation pad is just used for insulation to prevent uneven heating after the upper mold heating chamber 4 and the lower mold heating chamber 5 are superimposed, and the temperature fluctuates and is difficult to control.

[0027] In the specific operation process, the upper mold 2 and the lower mold 3 are embedded to form a group of molds 1, and several groups of molds 1 are combined together through the plug-in 12 and the slot 11. The coated sand material is injected from the sand shooting port 18, and the temperature of the thermocouple 26 is simultaneously controlled by the temperature control device 28, and the heating is confirmed by the temperature sensor 27.

[0028] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the appended claims, but all will fall within the scope of protection of the present invention.

Claims

1. A laminated sand mold, characterized in that: The invention comprises a plurality of groups of moulds (1); the moulds (1) comprise an upper mould (2) and a lower mould (3) which are fitted together; an upper mould heating chamber (4) is provided at the bottom of the upper mould (2), and a lower mould heating chamber (5) is provided at the bottom of the lower mould (3); the upper mould heating chamber (4) and the lower mould heating chamber (5) comprise a metal shell (6), a thermocouple jack (7), a temperature measuring hole (8), a heat conduction constant temperature device (9) and a heat insulation device (10); the metal shell (6) has the same size as the upper mould and the lower mould, and is provided with a heat conduction constant temperature device (9) and a heat insulation device (10). The heat-conducting constant temperature device (9) has a plurality of groups of thermocouple jacks (7) and temperature measuring holes (8) arranged in a continuous manner in the heat-conducting constant temperature device (9); a heat-insulating device (10) is provided between the metal shell (6) and the heat-conducting constant temperature device (9), and between the thermocouple jacks (7), the temperature measuring holes (8) and the heat-conducting constant temperature device (9); slots (11) are provided at four corners of the upper mold heating chamber (4), and plug-ins (12) are provided at four corners of the lower mold heating chamber (5); and a heat-insulating pad (13) is provided between the slots (11) and the plug-ins (12).

2. The stackable coated sand mold according to claim 1 is characterized in that: The upper mold (2) is provided with an upper mold molding cavity (14), an ejector pin (15) and a positioning piece (16) on its surface, a group of exhaust grooves (17) and two groups of sand injection ports (18) on its side, and an upper mold heating chamber (4) is provided at its bottom; the middle of the upper mold molding cavity (14) is connected to the sand injection ports (18) via two groups of runners (19); the lower mold (3) is provided with a lower mold molding cavity (20), an ejector pin hole (21) and a positioning piece hole (22) corresponding to the upper mold (2), and a lower mold heating chamber (5) is provided at its bottom.

3. The stackable coated sand mold according to claim 2 is characterized in that: The upper mold cavity (14) is arranged at the center, and an ejector pin (15) and a positioning piece (16) are provided on the side, corresponding to the lower mold cavity (20), the ejector pin hole (21) and the positioning piece hole (22).

4. The stackable coated sand mold according to claim 2 is characterized in that: Four groups of concave blocks (23) are provided at the four corners of the upper die (2) to match the convex blocks (24) provided at the four corners of the lower die (3).

5. The stackable coated sand mold according to claim 2 is characterized in that: A filter screen (25) is provided at the sand shooting port (18).

6. The stackable coated sand mold according to claim 1 is characterized in that: The thermocouple jack (7) and the temperature measuring hole (8) are arranged at intervals; a thermocouple (26) is fixed in the thermocouple jack (7); a temperature sensor (27) is fixed in the temperature measuring hole (8); and the thermocouple (26) is electrically connected to a temperature control device (28).

7. The stackable coated sand mold according to claim 1 is characterized in that: The slot (11) is arranged at the four corners of the metal shell (6), with the highest point being higher than the plane of the metal shell (6); a heightening block (29) is provided at the bottom of the plug-in (12); the height difference between the slot (11) and the plane of the metal shell (6) and the height of the heightening block (29) are consistent with the thickness of the heat insulation pad (13).

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