A cooling system and cooling method for die casting machine lining

Abstract

The present invention discloses a cooling system and a cooling method for a die-casting machine liner, and relates to the technical field of die-casting machine liner cooling, including a pressure chamber, a liner, a refrigeration mechanism and a detection mechanism, wherein the detection mechanism includes a detection box, wherein a plurality of connecting rods are fixed in the detection box, wherein the connecting rods are connected to a fixed sleeve, wherein the fixed sleeve is rotatably connected to a turntable, wherein the turntable surface is arranged to be a conical filter screen structure, wherein a slide cylinder is arranged at the bottom of the turntable, wherein the slide cylinder is a hollow structure, wherein a circular filter screen is fixed inside the slide cylinder, wherein a plurality of sliders are fixed to the outer wall of the slide cylinder, wherein a slide groove is provided at the bottom of the turntable to cooperate with the slider, wherein a spring is connected between the slider and the slide groove, and a pressure sensing module is laid at the bottom of the slide groove. The present invention can detect and judge the flow rate of cooling water, the impurities carried and the heat absorption efficiency respectively, thereby improving the cooling quality of the pressure chamber liner.

Description

Technical Field

[0001] The invention relates to the technical field of cooling the inner lining of a die casting machine, and in particular to a cooling system for the inner lining of a die casting machine and a cooling method thereof. Background Art

[0002] The injection chamber of the die casting machine is a very critical component of the die casting machine. Its function is to store the molten metal and inject the molten metal into the mold cavity at a certain speed and pressure during the die casting process. The injection chamber mainly consists of two parts: the barrel and the punch. In order to avoid direct contact with the high-temperature molten metal and damage to the inner wall of the injection chamber, the injection chamber is generally provided with a lining, which can protect the injection chamber, improve the quality of the casting, and facilitate replacement when damaged.

[0003] The cooling system is an important step throughout the die-casting process. It is mainly used for cooling the lining and the mold. It is generally composed of multiple cooling pipes. The mold is a key part for the die-casting machine casting. There are often multiple cooling pipes inside the mold to help the casting cool and form. As for the inner lining of the die-casting chamber, in order not to affect the temperature of the molten metal before injection, generally no cooling pipes are set or a small number of pipes are set to help the lining absorb heat and extend the service life of the lining.

[0004] For the cooling system of the press chamber lining, because the lining is in direct contact with the molten metal, it needs to absorb a large amount of heat and the direct contact temperature is also high. The water cooling passage needs to withstand a certain temperature and pressure. Long-term exposure to heat and pressure may cause material fatigue and corrosion, or impurities may precipitate and accumulate inside the water passage during long-term use, affecting the circulation of the coolant and reducing the cooling effect of the lining. Summary of the invention

[0005] The object of the present invention is to provide a cooling system for a die casting machine liner and a cooling method thereof to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a cooling system for a die-casting machine liner and a cooling method thereof, comprising a pressure chamber, a liner, a refrigeration mechanism and a detection mechanism, wherein the liner is arranged inside the pressure chamber, a main water cooling passage is arranged inside the pressure chamber, the inlet end of the main water cooling passage is connected to the refrigeration mechanism, the outlet end of the main water cooling passage is connected to the detection mechanism, and the refrigeration mechanism and the detection mechanism are connected to each other.

[0007] According to the above technical solution, the detection mechanism includes a detection box, a plurality of connecting rods are fixed inside the detection box, the connecting rods are connected to a fixed sleeve, the fixed sleeve is rotatably connected to a turntable, the turntable surface is arranged to be a conical filter structure, a slide cylinder is arranged at the bottom of the turntable, the slide cylinder is a hollow structure, a circular filter is fixed inside the slide cylinder, a plurality of sliders are fixed to the outer wall of the slide cylinder, a slide groove is provided at the bottom of the turntable to cooperate with the slider, a spring is connected between the slider and the slide groove, and a pressure sensing module is laid at the bottom of the slide groove.

[0008] According to the above technical solution, the water outlet pipe extending into the detection box is arranged at an angle, and several push plates are arranged at an angle on the turntable surface to assist cooling water in pushing the turntable to rotate. A test block is arranged on the outer wall of the turntable, and an infrared detection module is arranged on the inner wall surface of the detection box at the same horizontal height as the test block.

[0009] According to the above technical solution, a temperature detection belt is vertically arranged in the detection box to detect the water temperature at different heights.

[0010] According to the above technical solution, an air hood is provided on the outer cover of the detection box, a gas input port is provided at the bottom of the air hood and the input port is connected to the refrigeration mechanism, a temperature detection belt is provided on the inner wall of the air hood for detecting the gas temperature at different levels in the air hood, an air pump is provided on the top of the air hood, the input end of the air pump is connected to the air hood, and the output end of the air pump is connected to the detection box and is located on the lower side of the turntable surface.

[0011] According to the above technical solution, the pressure chamber is provided with a backup passage, the input end of the backup passage is connected to the refrigeration mechanism, the output end of the backup passage is connected to the detection box, the backup passage is used when the main water cooling passage cannot provide the required cooling effect, and the main water cooling passage is provided with a cleaning box in parallel for cleaning when accumulation and blockage occur inside the main water cooling passage.

[0012] According to the above technical solution, the cleaning box stores cleaning liquid and clean water respectively and is connected to a pumping device.

[0013] According to the above technical solution, the cooling method is as follows:

[0014] Step 1: The die-casting machine starts working, and the refrigeration mechanism injects a certain amount of cooling water into the main water cooling passage;

[0015] Step 2: Cooling water flows through the main water cooling passage and absorbs heat, and is transported to the detection mechanism after a certain unit time;

[0016] Step 3: The testing organization tests and determines the cooling water flow rate, impurities carried, and heat absorption efficiency.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention is provided with a detection mechanism, in which the rotatable turntable can be rotated with the help of the impulse generated by the cooling water, and the flow condition is judged by the detected rotation speed, so as to analyze whether the cooling passage is blocked and can be cleaned; wherein the pressure sensing module identifies whether there is impurity accumulation through the pressure change brought by the slide cylinder, so as to judge whether the cooling pipeline is worn and the inner wall is peeled off, so as to timely warn and maintain, thereby improving the overall cooling quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the cooling process of the present invention;

[0020] Figure 2 The present invention Figure 1 A magnified schematic diagram of area A;

[0021] Figure 3 It is a schematic diagram of the pressure chamber and the liner of the present invention;

[0022] Figure 4 is a schematic diagram of the backup pathway of the present invention;

[0023] Figure 5 It is a schematic diagram of the detection mechanism of the present invention;

[0024] Figure 6 It is a partial schematic diagram of the detection box of the present invention;

[0025] Figure 7 The present invention Figure 6 A magnified schematic diagram of area B;

[0026] Figure 8 The present invention Figure 6 A magnified schematic diagram of region C;

[0027] Fig. 9 is a schematic diagram of the backup pathway of the present invention;

[0028] In the figure: 1. pressure chamber; 11. main water cooling passage; 12. spare passage; 13. cleaning box; 2. lining; 3. refrigeration mechanism; 40. detection box; 401. infrared detection module; 402. temperature detection belt one; 41. connecting rod; 42. fixing sleeve; 43. turntable; 431. conical filter; 432. slide; 433. push plate; 434. test block; 44. slide cylinder; 441. circular filter; 442. slider; 45. spring; 46. air hood; 461. temperature detection belt two; 462. air pump. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-9 The present invention provides a technical solution: a cooling system for a die-casting machine liner, comprising a pressure chamber 1, a liner 2, a refrigeration mechanism 3 and a detection mechanism, wherein the liner 2 is arranged inside the pressure chamber 1, a main water cooling passage 11 is arranged inside the pressure chamber 1, the inlet end of the main water cooling passage 11 is connected to the refrigeration mechanism 3, the outlet end of the main water cooling passage 11 is connected to the detection mechanism, and the refrigeration mechanism 3 and the detection mechanism are connected to each other;

[0031] The detection mechanism includes a detection box 40, in which a plurality of connecting rods 41 are fixed, the connecting rods 41 are connected to a fixing sleeve 42, the fixing sleeve 42 is rotatably connected to a turntable 43, the turntable 43 has a disk surface arranged as a conical filter screen 431 structure, a slide cylinder 44 is arranged at the bottom of the turntable 43, the slide cylinder 44 is a hollow structure, a circular filter screen 441 is fixed inside the slide cylinder 44, a plurality of sliders 442 are fixed to the outer wall of the slide cylinder 44, a slide groove 432 is provided at the bottom of the turntable 43 to cooperate with the slider 442, a spring 45 is connected between the slider 442 and the slide groove 432, and a pressure sensing module is laid at the bottom of the slide groove 432.

[0032] Supplementary explanations based on the above structure are as follows: the refrigeration method adopted by the refrigeration mechanism 3 is not unique, and it can be coolant circulation refrigeration. The refrigeration mechanism 3 is used to cool the water body to the required cooling temperature, and then the cooling water is transported to the detection box 40 and is located on the turntable 43. The cooling water enters the bottom space of the detection box 40 after being filtered through the conical filter screen 431 and the circular filter screen 441. If the main water cooling passage 11 is damaged and the inner wall is detached, the cooling water will carry impurities when passing through the main water cooling passage 11. The impurities are brought into the turntable 43 by the cooling water, and are accumulated on the circular filter screen 441 after being isolated by the filter screen. The pressure sensing module identifies whether there is impurity accumulation through the pressure change brought by the slide cylinder 44, thereby judging whether the main water cooling passage 11 is worn.

[0033] In one embodiment, Figures 6 and 7 As shown, in order to help better promote the rotation of the turntable 43, the water outlet extending into the detection box 40 is set at an angle, and a plurality of push plates 433 are set at an angle on the turntable 43 surface to assist cooling water in promoting the rotation of the turntable 43. A test block 434 is set on the outer wall of the turntable 43, and an infrared detection module 401 is set on the inner wall surface of the detection box 40 at the same horizontal height as the test block 434.

[0034] It should be noted that the infrared detection module 401 is used to reach the distance of the outer wall of the turntable 43. In actual settings, the test block 434 must exceed the general outer wall width of the turntable 43. After the turntable 43 rotates, the infrared detection module 401 will detect continuous equal distance signals. When the test block 434 passes through the detection range of the infrared detection module 401, the infrared detection module 401 will detect a short-distance signal, thereby identifying the test block 434.

[0035] A temperature detection belt 402 is vertically arranged in the detection box 40 for detecting the water temperature at different heights;

[0036] Furthermore, an air hood 46 is provided on the outer cover of the detection box 40, a gas input port is provided at the bottom of the air hood 46 and the input port is connected to the refrigeration mechanism 3, a temperature detection belt 461 is provided on the inner wall of the air hood 46 for detecting the gas temperature at different levels in the air hood 46, an air pump 462 is provided on the top of the air hood 46, the input end of the air pump 462 is connected to the air hood 46, and the output end of the air pump 462 is connected to the detection box 40 and is located on the lower side of the turntable 43.

[0037] It should be noted that: after the cooling of the liner is completed, the cooling water after absorbing heat flows into the detection box 40, the temperature detection belt 1 402 detects the temperature value to determine the heat absorption situation, and then a certain amount of cold air flow is introduced into the air hood 46 to perform heat exchange on the water body in the detection box 40, and the temperature detection belt 2 461 records the temperature change. When used for heat exchange, the cold air flow can help the water body to cool down quickly, so that the water body transported back to the refrigeration mechanism 3 is in a suitable temperature range, and the energy consumption of the refrigeration mechanism 3 can be reduced when re-cooling, saving energy; after the heat exchange, the gas in the air hood 46 is stratified according to the different heat, the air flow with higher temperature rises, and the air flow with lower temperature falls, and the air pump 462 The airflow is extracted and transported to the detection box 40. The upper side of the detection box 40 is connected to the refrigeration mechanism 3. A gas output device, such as an air pump, is provided on the connecting pipeline. The gas output device is used to slowly pump the gas in the detection box 40 back to the refrigeration mechanism 3. The airflow input to the detection box 40 can help to clear the mesh holes in the process of passing through the conical filter 431. The heat can be used to dry the mesh surface and help to remove impurities attached to the surface of the conical filter 431. Drying the circular filter 441 helps to improve the accuracy of the pressure sensing module detection. At the same time, the absorbed heat can be reasonably utilized. When it is sent back to the refrigeration mechanism 3, it can be in a suitable temperature range, and the energy consumption of the refrigeration mechanism 3 can be reduced when it is cooled again.

[0038] Furthermore, in one embodiment, the pressure chamber 1 is provided with a backup passage 12, the input end of the backup passage 12 is connected to the refrigeration mechanism 3, the output end of the backup passage 12 is connected to the detection box 40, the backup passage 12 is used when the main water cooling passage 11 cannot provide the required cooling effect, and the main water cooling passage 11 is provided with a cleaning box 13 in parallel for cleaning when accumulation and blockage occur inside the main water cooling passage 11.

[0039] It should be additionally explained that the cleaning box 13 stores cleaning liquid and clean water respectively and is connected to a pumping device such as a water pump.

[0040] Specifically, the cooling method is as follows:

[0041] Step 1: The die-casting machine starts working, and the refrigeration mechanism 3 injects a certain amount of cooling water into the main water cooling passage 11;

[0042] Step 2: Cooling water flows through the main water cooling passage 11 and absorbs heat, and is transported to the detection mechanism after a certain unit time;

[0043] Step 3: The testing organization tests and determines the cooling water flow rate, impurities carried, and heat absorption efficiency.

[0044] Further, the cooling water flow detection method is as follows, step three-a: when the cooling water is delivered to the detection box 40, the water flow will impact the surface of the turntable 43, causing the turntable 43 to rotate. If there is no scale accumulation or partial blockage of the main water cooling passage 11, the cooling water flow is normal, and the turntable 43 will rotate within an ideal speed range. If there is scale accumulation or partial blockage of the passage inside the main water cooling passage 11, the cooling water flow will decrease, the impact on the turntable 43 will also decrease, and the rotation speed of the turntable 43 will slow down. Based on this, it is judged whether the main water cooling passage 11 is unobstructed;

[0045] Specifically, the detection of the rotation speed of the turntable 43 is achieved through the infrared detection module 401 and the test block 434. When the turntable 43 starts to rotate, the infrared detection module 401 will record the frequency of the test block 434. Every two test block 434 signals represent one circle. By recording the interval time of the test block 434 signals, the slowest value and the fastest value are taken to form an ideal interval range for comparison. When the infrared detection module 401 detects that a signal is less than the ideal interval, the average value of multiple signals is taken for comparison. If the average value is still within the ideal interval, it is not considered that the flow rate is too small. If the average value is also less than the ideal interval, it is determined that the overall flow rate is too small, and the inside of the main water cooling passage 11 needs to be cleaned.

[0046] Furthermore, the main water cooling passage 11 is cleaned as follows: the pipeline between the main water cooling passage 11 and the refrigeration mechanism 3 is closed, and the cleaning box 13 delivers cleaning liquid to the main water cooling passage 11 and then draws it back. After repeating several times, the cleaning box 13 delivers clean water to the main water cooling passage 11. The clean water will be delivered to the detection box 40 for testing and then drawn back to the cleaning box 13. According to the flow of clean water, it is judged whether the inside of the main water cooling passage 11 has been cleaned and unblocked.

[0047] The method for detecting impurities carried by cooling water is as follows: Step 3-b: In order not to affect the judgment, it is assumed that the cooling water itself does not carry impurities or the size of the particles carried by the cooling water is not large enough to be screened out by the conical filter 431 and the circular filter 441. When the main water cooling passage 11 is damaged or the inner wall is corroded and falls off, the cooling water will carry impurities when it flows out. The impurities are filtered by the conical filter 431 and the circular filter 441. After one cooling is completed, the impurities will accumulate on the surface of the circular filter 441. The pressure sensing module will detect whether there are impurities, thereby judging the internal state of the main water cooling passage 11.

[0048] Furthermore, in order to avoid the influence of residual water on the detection results of the pressure sensing module, air flow is introduced through the air hood 46 to dry the conical filter 431 and the circular filter 441 and remove impurities adhering to the filter surface, which can further improve the accuracy of the detection results. The initial pressure signal detected by the pressure sensing module in the state without external force is set to P. During the cooling water input process, the P value will become larger due to the impact of the water flow. After a certain period of time, the detection pressure signal will stabilize, and then it will begin to change with the drying of the conical filter 431 and the circular filter 441 and the accumulation of impurities, and finally stabilize at a value. After comparison, it is determined whether there is impurity accumulation, that is, whether there is damage in the main water cooling passage 11.

[0049] The method for detecting the heat absorption efficiency of cooling water is as follows, step three-c: in order not to affect the judgment, set the amount of cooling water used for each cooling to be equal. After one cooling, the temperature detection belt 402 detects the temperature of the cooling water after heat absorption, records the temperature values ​​at different heights and takes the average, calculates the absorbed heat according to the temperature difference before and after and the water volume, and sets an ideal heat absorption range for comparison. If the heat absorption effect is not ideal, auxiliary heat absorption is performed through the backup path 12 to ensure the heat absorption quality.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cooling system for a die-casting machine liner, comprising a die-casting chamber (1), a liner (2), a refrigeration mechanism (3) and a detection mechanism, characterized in that: The lining (2) is arranged inside the pressure chamber (1), a main water cooling passage (11) is arranged inside the pressure chamber (1), an inlet end of the main water cooling passage (11) is connected to the refrigeration mechanism (3), an outlet end of the main water cooling passage (11) is connected to the detection mechanism, and the refrigeration mechanism (3) and the detection mechanism are connected to each other; The detection mechanism comprises a detection box (40), wherein a plurality of connecting rods (41) are fixed inside the detection box (40), wherein the connecting rods (41) are connected to a fixing sleeve (42), wherein the fixing sleeve (42) is rotatably connected to a turntable (43), wherein the turntable (43) has a disk surface arranged as a conical filter screen (431) structure, wherein a slide cylinder (44) is arranged at the bottom of the turntable (43), wherein the slide cylinder (44) is a hollow structure, wherein a circular filter screen (441) is fixed inside the slide cylinder (44), wherein a plurality of sliding blocks (442) are fixed to the outer wall of the slide cylinder (44), wherein a slide groove (432) is provided at the bottom of the turntable (43) to cooperate with the sliding block (442), wherein a spring (45) is connected between the sliding block (442) and the slide groove (432), and wherein a pressure sensing module is arranged at the bottom of the slide groove (432); An air hood (46) is provided on the outer cover of the detection box (40), a gas input port is provided at the bottom of the air hood (46) and the input port is connected to the refrigeration mechanism (3), a temperature detection belt (461) is provided on the inner wall of the air hood (46) for detecting the gas temperature at different levels in the air hood (46), an air pump (462) is provided at the top of the air hood (46), an input end of the air pump (462) is connected to the inside of the air hood (46), and an output end of the air pump (462) is connected to the inside of the detection box (40) and is located at the lower side of the turntable (43); The water outlet of the main water cooling passage (11) extending into the detection box (40) is arranged obliquely, and the surface of the turntable (43) is provided with a plurality of push plates (433) obliquely for assisting the cooling water in pushing the turntable (43) to rotate, the outer wall of the turntable (43) is provided with a test block (434), and the detection box (40) is provided with an infrared detection module (401) on the inner wall surface at the same level as the test block (434); A temperature detection belt (402) is vertically arranged in the detection box (40) for detecting the temperature of water at different heights.

2. A cooling system for a die casting machine liner according to claim 1, characterized in that: The pressure chamber (1) is provided with a spare passage (12), the input end of the spare passage (12) is connected to the refrigeration mechanism (3), and the output end of the spare passage (12) is connected to the detection box (40). The spare passage (12) is used when the main water cooling passage (11) cannot provide the required cooling effect. The main water cooling passage (11) is provided with a cleaning box (13) in parallel, which is used to clean the main water cooling passage (11) when accumulation and blockage occur inside.

3. A cooling method for a cooling system for a die-casting machine lining, applicable to a cooling system for a die-casting machine lining according to claim 2, characterized in that: The cooling method is as follows: Step 1: The die-casting machine starts to work, and the refrigeration mechanism (3) injects a fixed amount of cooling water into the main water cooling passage (11); Step 2: Cooling water circulates in the main water cooling passage (11) and absorbs heat, and is transported to the detection mechanism after a certain unit time; Step 3: The testing organization tests and determines the cooling water flow rate, impurities carried, and heat absorption efficiency.

4. A cooling method for a cooling system for a die casting machine liner according to claim 3, characterized in that: The cooling water flow detection method is as follows: Step 3-a: When the cooling water is delivered to the detection box (40), the water flow will impact the surface of the turntable (43), causing the turntable (43) to rotate. If there is no scale accumulation or partial blockage in the main water cooling passage (11), the cooling water flow is normal and the turntable (43) rotates within an ideal speed range. If there is scale accumulation or partial blockage in the main water cooling passage (11), the cooling water flow is reduced, the impact on the turntable (43) is also reduced, and the turntable (43) rotation speed is slowed down. Based on this, it is judged whether the main water cooling passage (11) is unobstructed.

5. The cooling method of a cooling system for a die casting machine liner according to claim 4, characterized in that: The detection of the rotation speed of the turntable (43) is achieved through the infrared detection module (401) and the test block (434). When the turntable (43) starts to rotate, the infrared detection module (401) records the frequency of the test block (434) appearing. Every two test block (434) signals represent one circle. By recording the interval time of the test block (434) signals, the slowest value and the fastest value are taken to form an ideal interval range for comparison. When the infrared detection module (401) detects that a signal is less than the ideal interval, the average value of multiple signals is taken for comparison. If the average value is still within the ideal interval, it is not considered that the flow rate is too small. If the average value is also less than the ideal interval, it is determined that the overall flow rate is too small and the inside of the main water cooling passage (11) needs to be cleaned.

6. A cooling method for a cooling system for a die casting machine liner according to claim 5, characterized in that: The detection method of impurities carried by cooling water is as follows: Step 3-b: It is assumed that the cooling water itself does not carry impurities or the size of the particles carried by the cooling water is not large enough to be screened out by the conical filter (431) and the circular filter (441). When the main water cooling passage (11) is damaged or the inner wall is corroded and detached, the cooling water will carry impurities when it flows out. The impurities are filtered by the conical filter (431) and the circular filter (441). After one cooling is completed, the impurities will accumulate on the surface of the circular filter (441). The pressure sensing module will detect whether there are impurities, thereby judging the internal state of the main water cooling passage (11).

7. A cooling method for a cooling system for a die casting machine liner according to claim 6, characterized in that: The method for detecting the heat absorption efficiency of cooling water is as follows: Step 3-c: Set the amount of cooling water used for each cooling to be equal. After one cooling, the temperature detection belt 1 (402) detects the temperature of the cooling water after heat absorption, records the temperature values ​​at different heights and takes the average value, calculates the absorbed heat based on the temperature difference before and after and the water volume, and sets an ideal heat absorption range for comparison. If the heat absorption effect is not ideal, auxiliary heat absorption is performed through the backup path (12) to ensure the heat absorption quality.

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