An isothermal control injection mold

Abstract

The present invention relates to the field of injection molding technology, and discloses an isothermal control injection mold, which includes a mold clamping body. A number of cooling circulation modules are installed on the surface of the mold clamping body, and a macroscopic adjustment component is arranged inside the mold clamping body. The macroscopic adjustment component includes a number of heat conduction tubes fixedly connected to the inside of the mold clamping body, and a temperature difference spiral piece is installed inside each heat conduction tube. When the temperature in the middle of the cavity changes, hot air rises, making the temperature difference spiral pieces evenly heated and expand, thereby pushing the contact plate to move, driving the flow valve spool to rotate through the trigger arm and the swing piece, and realizing the real-time adjustment of the coolant flow rate. Therefore, the macroscopic adjustment component can accurately match the heat load differences in each stage of injection molding filling, pressure holding, and cooling, effectively avoiding the problems of local overheating or insufficient cooling caused by the fixed water flow in the traditional mold, and improving the quality stability and performance reliability of automotive parts by dynamically adjusting the coolant flow rate.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding, and specifically to an injection mold with uniform temperature control. Background Art

[0002] Injection molds are widely used in the field of automotive part injection molding. They utilize the circulation of coolant in the water channels to rapidly reduce the mold temperature. After the mold temperature reaches the ideal state, high-temperature plastic melt is accurately injected into the cavity. As the melt gradually cools in the cavity, the mold continuously exerts its cooling effect until the injection molded part is completely cooled and formed. At this time, the injection mold is opened, and the formed automotive injection molded part can be smoothly taken out. The entire process, with the precise control of the mold temperature and efficient process arrangement, greatly improves the product quality and production efficiency of automotive parts.

[0003] However, the existing injection molds still expose many problems in actual applications: First, in the overall injection molding stage, there are significant differences in the heat load of the mold in different stages of filling, holding pressure, and cooling. At present, the water flow rate in the mold water channels is fixed, and it is difficult to dynamically adjust the coolant flow rate according to the real-time change of the mold surface temperature. During the injection molding process, the melt flow at the four corners of the mold (such as the automotive window frame) is affected by bending, resulting in problems of blocked flow. At this time, the temperature distribution is uneven. If the cooling flow rate cannot match, it will cause insufficient cooling in some areas, local overheating of the product, resulting in problems such as deformation and internal stress concentration, seriously affecting the quality stability and performance reliability of automotive parts.

[0004] In addition, as the coolant flows in the water channels, its pressure will gradually decrease, which is particularly obvious in long-flow water channels. When the coolant runs to the rear end of the water channel, the flow rate significantly slows down. Although theoretically, a lower flow rate can extend the heat exchange time between the coolant and the mold, in actual situations, in complex mold structures, too slow a flow rate will cause the coolant to be difficult to effectively carry away the locally accumulated heat, resulting in local overheating.

[0005] Specifically, after the flow rate of the rear-end coolant decreases, it is easy to form a high-temperature area in key parts such as the mold core, resulting in slow cooling of the injection molded parts in this area, abnormal internal crystal structure, and decline in mechanical properties. It may even cause serious quality problems such as local burning and bubbles of the product, greatly increasing the defective rate, raising production costs, and reducing production efficiency. Moreover, local overheating will accelerate the thermal fatigue wear of the mold, shorten the service life of the mold, increase the mold maintenance and replacement costs, and have a negative impact on the economy and sustainability of automotive part injection molding production.

[0006] Therefore, the present invention proposes an injection mold with uniform temperature control. Summary of the Invention

[0007] The purpose of the present invention is to provide an isothermal control injection mold to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above object, the present invention provides the following technical solution: An isothermal control injection mold includes a mold clamping body, on the surface of which several cooling circulation modules are installed. A macroscopic adjustment component is arranged inside the mold clamping body. The macroscopic adjustment component includes several heat conduction tubes fixedly connected inside the mold clamping body. Temperature difference spiral sheets are installed inside each heat conduction tube. The temperature difference spiral sheet is composed of two metals with different coefficients of thermal expansion. On the side close to the outside in each heat conduction tube, a contact plate is slidably connected. On the side far from the mold clamping body in each heat conduction tube, a trigger arm is rotatably connected, and the trigger arm is slidably connected to the surface of the contact plate. A swing member is installed at the end of the trigger arm far from the mold clamping body. The trigger arm is used to amplify the displacement of the contact plate. A flow valve is externally connected to the cooling circulation module. One end of the swing member far from the heat conduction tube is installed with the valve core of the flow valve. The swing member provides the function of converting the swinging force into a rotational force.

[0009] Preferably, the heat conduction tube is in a continuously upwardly inclined form. The end of the heat conduction tube close to the mold clamping body is set to gradually contract, and the end of the heat conduction tube far from the mold clamping body is set to gradually expand. The trigger arm is in an L shape, and its shorter side is slidably connected to the surface of the contact plate, and the longer section is installed with the swing member. The contracting end of the heat conduction tube is located in the middle of the cavity of the mold clamping body.

[0010] Preferably, several placement grooves are opened on the surface of the end of the heat conduction tube close to the mold clamping body, and a pressure sleeve is fixedly connected inside each placement groove.

[0011] Preferably, a spiral groove that continuously contracts towards the outside is opened in the middle of the heat conduction tube, and the temperature difference spiral sheet is fixedly connected to the surface of the spiral groove.

[0012] Preferably, several telescopic rods I are fixedly connected inside the heat conduction tube, and the output ends of the telescopic rods I are fixedly connected to the surface of the contact plate.

[0013] Preferably, the swing member includes a swing frame, a slider, a sliding column, and an eccentric plate. The swing frame is fixedly connected to the outer surface of the trigger arm. The slider is slidably connected to the bottom of the swing frame. The sliding column is fixedly connected to the bottom of the slider. The eccentric plate is fixedly connected to the valve core of the flow valve, and the eccentric plate is slidably connected to the outer surface of the sliding column.

[0014] Preferably, the inner side of the temperature difference spiral sheet is made of brass metal, and the outer side is made of stainless steel.

[0015] Preferably, the mold clamping body is divided into an upper mold and a lower mold, and water channels are symmetrically arranged inside both of them. The cooling circulation module is interconnected with the water channels through water pipes, and the flow valve is located between the input end of the cooling circulation module and the water pipe.

[0016] Preferably, a microscopic adjustment component is arranged inside the water channel. The macroscopic adjustment component includes a number of second telescopic rods. The second telescopic rods are all fixedly connected to the bottom on one side of the water channel far from the input end. The top of the second telescopic rod is fixedly connected with a partition plate. The bottom of the partition plate is arc-shaped and matches the flowing direction of the water flow. The partition plate is slidably connected inside the water channel.

[0017] Preferably, a spring is fixedly connected between the fixed end and the telescopic end of the second telescopic rod. The spring is made of shape memory alloy, specifically nickel-titanium shape memory alloy.

[0018] Preferably, the cooling circulation module at least includes a water pump and a water tank. There are four cooling circulation modules, that is, two are symmetrically arranged on the surfaces of both the upper mold and the lower mold, and the water pump is fixedly connected to the outer surfaces of the upper mold and the lower mold.

[0019] Preferably, the water channel is divided into a horizontal flow channel and a vertical flow channel.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When the temperature in the middle of the cavity changes, the hot air rises, making the temperature difference spiral piece evenly heated and expand, and then pushing the contact plate to move. The flow valve spool is driven to rotate through the trigger arm and the swing part, realizing the real-time adjustment of the coolant flow rate. Therefore, the macroscopic adjustment component can accurately match the heat load differences in each stage of injection molding filling, pressure holding, and cooling, effectively avoiding the problems of local overheating or insufficient cooling caused by the fixed water flow rate in the traditional mold. The quality stability and performance reliability of automotive parts are improved by dynamically adjusting the coolant flow rate.

[0021] 2. During the flow of the coolant, when it flows to different points, due to the temperature difference, the spring expands by different degrees when heated, pushing the partition plate to move up and down, changing the local cross-sectional area of the water channel. At the third and fourth points, through the adjustment of the partition plate, the coolant accelerates on the side of the vertical flow channel far from the injection molded part, improving the heat dissipation efficiency; on the side close to the injection molded part, the space increases and the flow rate slows down, which is beneficial to fully absorb heat. This dynamic adjustment makes the temperature distribution of each part of the mold more uniform, avoids local overheating phenomena, and reduces the risk of internal stress concentration and deformation of the injection molded part.

[0022] 3. One end of the heat conduction tube close to the mold clamping body is provided with a pressure sleeve. Its shrinking end reduces the contact area between the heat conduction tube and the mold clamping body. According to the pressure formula, when the pressure is constant, the smaller the contact area, the greater the pressure. At the same time, the pressure sleeve fits tightly, playing a good role in resistance sealing, ensuring the stability of the pressure holding stage, and avoiding pressure relief due to pressure changes. This helps the melt to be fully filled in the mold, reduces defects such as shrink marks and voids in the injection molded parts, improves the quality and dimensional accuracy of the injection molded parts, and reduces the defective rate.

[0023] 4. Compared with traditional injection molds, the macro-adjustment component avoids using a complex electronic control system to adjust the coolant flow. This not only reduces the procurement cost of electronic components but also lowers the maintenance cost caused by electronic equipment failures. Moreover, due to the high reliability of this structure, it can effectively reduce the number of production interruptions caused by mold failures, and reduce the potential economic losses brought by production stagnation. In the long run, it greatly reduces the comprehensive cost of the mold.

[0024] 5. The waterway structure of traditional injection molds is relatively complex. It is difficult to install complex parts in it, and it requires professional technicians to spend a lot of time and energy for operation. Also, problems such as improper installation and part damage are likely to occur during the installation process. However, the design of the second telescopic rod and the partition greatly simplifies the installation process. The second telescopic rod is directly fixedly connected to the bottom on the side of the waterway far from the input end, and the installation method is simple and clear. The partition is connected to the top of the second telescopic rod. Therefore, this design makes the installation of the partition inside the waterway smoother, without the need for complex positioning and calibration operations. Even non-professional personnel can quickly complete the installation work after simple training, significantly improving the installation efficiency, reducing the installation difficulty, and providing convenience for the maintenance and upgrade of the injection mold. Description of the Drawings

[0025] Figure 1 It is a front view three-dimensional schematic diagram of the main structure of the present invention.

[0026] Figure 2 It is a three-dimensional sectional view schematic diagram of the upper mold of the present invention.

[0027] Figure 3 It is a three-dimensional schematic diagram of the heat conduction tube of the present invention.

[0028] Figure 4 It is a three-dimensional sectional view schematic diagram of the heat conduction tube of the present invention.

[0029] Figure 5 It is a three-dimensional schematic diagram of another angle of the upper mold of the present invention.

[0030] Figure 6 For the present invention Figure 5 The enlarged three-dimensional schematic diagram of the structure at A in

[0031] Figure 7 It is a cross-sectional perspective schematic diagram of the flow valve of the present invention.

[0032] Figure 8 It is a schematic cross-sectional perspective view of the micro-adjustment component of the present invention.

[0033] Figure 9 For the present invention Figure 8 Enlarged three-dimensional schematic diagram of the structure at point B in the middle.

[0034] Figure 10 Schematic diagram of the coolant flow path of the present invention.

[0035] In the figure: 11, mold body; 12, cooling circulation module; 13, water channel.

[0036] 2. Macro-adjustment assembly; 21. Heat pipe; 22. Pressurization sleeve; 23. Spiral groove; 24. Temperature difference spiral sheet; 25. Resistance plate; 26. Trigger arm; 27. Telescopic rod 1; 28. Swinging piece; 29. ​​Flow valve.

[0037] 3. Micro-adjustment component; 31. Telescopic rod 2; 32. Partition. DETAILED DESCRIPTION

[0038] 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.

[0039] It should be noted that the cooling circulation module 12 only provides the function of cooling circulation, and the flow valve 29 only provides the function of changing the opening and closing angle by rotating the valve core. The working principle and specific structure of the above structure are both existing technologies. Therefore, in view of the versatility of the above structure, its specific principle will not be repeated later.

[0040] Example 1, please refer to Figures 1 to 7As shown in the figure, a temperature-equalizing control injection mold includes a mold clamping body 11. A number of cooling circulation modules 12 are installed on the surface of the mold clamping body 11. A macroscopic adjustment component 2 is arranged inside the mold clamping body 11. The macroscopic adjustment component 2 includes a number of heat-conducting tubes 21 fixedly connected inside the mold clamping body 11. Temperature difference spiral sheets 24 are installed inside each of the heat-conducting tubes 21. The temperature difference spiral sheets 24 are composed of two metals with different thermal expansion coefficients. A contact plate 25 is slidably connected to one side of each heat-conducting tube 21 close to the outside. A trigger arm 26 is rotatably connected to one side of each heat-conducting tube 21 far from the mold clamping body 11, and the trigger arm 26 is slidably connected to the surface of the contact plate 25. A swing member 28 is installed at one end of the trigger arm 26 far from the mold clamping body 11. The trigger arm 26 is used to amplify the displacement of the contact plate 25. A flow valve 29 is externally connected to the cooling circulation module 12. One end of the swing member 28 far from the heat-conducting tube 21 is installed with the valve core of the flow valve 29. The swing member 28 provides the function of converting the swinging force into a rotational force.

[0041] It should be noted that the heat-conducting tube 21 is in a continuously upward-sloping form. One end of the heat-conducting tube 21 close to the mold clamping body 11 is set to gradually shrink, and one end of the heat-conducting tube 21 far from the mold clamping body 11 is set to gradually expand. The trigger arm 26 is in an L shape, and its shorter side is slidably connected to the surface of the contact plate 25, and the longer section is installed with the swing member 28. The shrinking end of the heat-conducting tube 21 is located in the middle of the cavity of the mold clamping body 11. A number of placement grooves are opened on the surface of one end of the heat-conducting tube 21 close to the mold clamping body 11. Pressure sleeves 22 are fixedly connected inside each of the placement grooves. A spiral groove 23 that continuously shrinks towards the outside is opened in the middle of the heat-conducting tube 21. The temperature difference spiral sheet 24 is fixedly connected to the surface of the spiral groove 23. A number of telescopic rods one 27 are fixedly connected inside the heat-conducting tube 21, and the output ends of the telescopic rods one 27 are fixedly connected to the surface of the contact plate 25. The swing member 28 includes a swing frame, a slider, a sliding column and an eccentric plate. The swing frame is fixedly connected to the outer surface of the trigger arm 26. The slider is slidably connected to the bottom of the swing frame. The sliding column is fixedly connected to the bottom of the slider. The eccentric plate is fixedly connected to the valve core of the flow valve 29, and the eccentric plate is slidably connected to the outer surface of the sliding column. The inner side of the temperature difference spiral sheet 24 is made of brass metal, and the outer side is made of stainless steel. The mold clamping body 11 is divided into an upper mold and a lower mold, and water channels 13 are symmetrically opened inside both of them. The cooling circulation module 12 is connected to the water channel 13 through a water pipe. The flow valve 29 is located between the input end of the cooling circulation module 12 and the water pipe.

[0042] Specifically, after the upper mold and the lower mold are clamped, the cooling circulation module 12 is started. At this time, the cooling circulation module 12 starts to work, and conveys the coolant to the water channel 13 inside the mold clamping body 11. Then, the high-temperature melt is injected into the cavity of the mold clamping body 11. The melt continuously flows in the cavity and gradually forms the required injection molded part.

[0043] In this process, since the contraction end of the heat pipe 21 is located in the middle of the cavity of the mold body 11, and the temperature in the middle of the cavity can better reflect the overall average temperature, the air inside the heat pipe 21 will be continuously heated, and the heat pipe 21 as a whole will gradually tilt upward. Based on the principle of hot air rising, the hot air will rise along the wall of the heat pipe 21. When the hot air passes through the spiral groove 23, the guiding and contraction effect of the spiral groove 23 makes the hot air have a certain spiral motion tendency, and the hot air with a spiral motion tendency is adapted to the shape of the temperature difference spiral plate 24, so that the temperature difference spiral plate 24 can receive heat evenly.

[0044] When the hot air rises and passes through the temperature differential spiral piece 24, since the temperature differential spiral piece 24 is composed of two metals with different thermal expansion coefficients (brass on the inside and stainless steel on the outside), the thermal expansion coefficient of brass is larger than that of stainless steel. When the temperature differential spiral piece 24 is heated by the hot air, the brass on the inside expands more than the stainless steel on the outside. This difference causes the overall spiral shape of the temperature differential spiral piece 24 to continue to expand. As the temperature differential spiral piece 24 continues to expand, it will contact the contact plate 25 and push the contact plate 25 to move. The movement of the contact plate 25 will cause the trigger arm 26 to rotate around its rotation connection point with the heat pipe 21.

[0045] At this time, based on the lever effect, the slight displacement of the shorter side of the trigger arm 26 (the side in contact with the contact plate 25) is magnified by the longer side of the trigger arm 26, and the long side of the trigger arm 26 swings upward. The swing of the trigger arm 26 will drive the swing frame fixed to it to move synchronously. When the swing frame moves, the slider passively slides on the surface of the swing frame. At the same time, the slide column is also driven by the slider to produce a trend of conforming to the upward movement of the swing frame. The slide column slides in the eccentric plate and pulls the eccentric plate to rotate. Subsequently, the rotation of the eccentric plate drives the valve core of the flow valve 29 to rotate. The rotation of the valve core increases the flow of coolant through the flow valve 29, thereby realizing dynamic adjustment of the internal temperature of the clamping body 11.

[0046] During the melt cooling process, timely increasing the coolant flow rate according to the temperature changes inside the mold can more efficiently remove heat, ensure uniform mold temperature, and avoid defects in injection molded parts due to local overheating or uneven cooling.

[0047] It should be noted that, since a pressure sleeve 22 is provided on the surface of the heat pipe 21, the mold body 11 needs to be pressure-maintained during the injection molding stage. The contracted end of the heat pipe 21 makes the contact area between it and the mold body 11 smaller. According to the pressure formula P=SF, when the pressure is constant, the smaller the contact area, the greater the pressure. At the same time, the pressure sleeve 22 fits tightly between the heat pipe 21 and the mold body 11, playing a good resistance and sealing role, so that the pressure will not be released due to pressure changes during the pressure holding process. The stable pressure holding process helps to fully fill the melt in the mold, reduce the occurrence of defects such as shrinkage marks and voids in the injection molded parts, and improve the quality and dimensional accuracy of the injection molded parts.

[0048] Based on the above, the macroscopic adjustment component 2 can drive the linkage of the trigger arm 26 based on temperature changes through the thermo-difference spiral piece 24, adjust the opening degree of the flow valve 29 after amplifying the tiny displacement, so as to realize the real-time adjustment of the coolant flow rate, accurately match the heat load differences in each stage of injection molding (filling, holding pressure, cooling), effectively avoid local overheating or insufficient cooling caused by a fixed flow rate. Secondly, the layout of the heat conduction tube 21 takes the middle part of the cavity as the core monitoring point, and combines with the spiral groove 23 to guide the hot air flow to evenly contact the thermo-difference spiral piece 24, ensuring the sensitivity and stability of the global temperature feedback. Finally, since the macroscopic adjustment component 2 adopts a pure mechanical structure and does not require external sensors or electric control, it reduces the cost and the risk of failure. At the same time, the design of the pressure sleeve 22 ensures the sealing performance during the holding pressure stage and reduces the filling defects caused by pressure relief. Therefore, the macroscopic adjustment component 2 has the characteristics of high efficiency, reliability and low cost, and can significantly improve the dimensional accuracy of injection molded parts and reduce the defective rate.

[0049] For Embodiment 2, please refer to Figures 8 to 10 As shown, a microscopic adjustment component 3 is arranged inside the water channel 13. The macroscopic adjustment component 2 includes a plurality of second expansion rods 31. The second expansion rods 31 are all fixedly connected to the bottom of one side of the water channel 13 away from the input end. The top of the second expansion rod 31 is fixedly connected with a partition plate 32. The bottom of the partition plate 32 is arc-shaped and matches the flowing direction of the water flow. The partition plate 32 is slidably connected inside the water channel 13.

[0050] It should be noted that a spring is fixedly connected between the fixed end and the telescopic end of the second expansion rod 31. The spring is made of shape memory alloy, specifically nickel-titanium shape memory alloy. The cooling circulation module 12 at least includes a water pump and a water tank, and the water tank stores coolant. There are four cooling circulation modules 12, that is, two are symmetrically arranged on the surfaces of both the upper mold and the lower mold, and the water pump is fixedly connected to the outer surfaces of the upper mold and the lower mold. The water channel 13 is divided into a horizontal flow channel and a vertical flow channel. The partition plates 32 are all located in the vertical flow channel, and the partition plates 32 block the horizontal flow channel, so that the coolant can only continue to move through the space at the bottom of the partition plate 32.

[0051] Specifically, on the basis of Embodiment 1, the macroscopic adjustment component 2 can already dynamically regulate the flow rate of the coolant. However, during the flow of the coolant, there are some problems. Since the path of the water channel 13 is relatively long, according to the principle of fluid mechanics, the coolant will generate friction with the pipe wall during flow, and the energy will be gradually lost, resulting in lower pressure and slower flow rate as it moves backward. When the coolant passes through four points of the injection molded part, for the last two points, although the slower flow rate can extend the contact time between the coolant and the points, it will also cause the problem of difficult heat dissipation.

[0052] Please refer to Figure 9As shown, the water channel 13 is divided into a horizontal flow channel and a vertical flow channel. The partition plate 32 is located in the vertical flow channel and blocks the horizontal flow channel, so that the coolant can only continue to move through the bottom space of the partition plate 32.

[0053] Please refer to as Figure 10 As shown, as the coolant flows, when the coolant reaches the third point, the coolant in the horizontal flow channel is blocked by the partition plate 32 and can only move along the inner wall of the partition plate 32 and the vertical flow channel. Due to the existence of the partition plate 32, this part of the space becomes smaller compared to the original water channel 13 (when there is no partition plate 32). According to the fluid continuity equation, with the flow rate unchanged, when the cross-sectional area of the flow channel decreases, the flow velocity increases. At this time, the part where the flow velocity increases is on the side of the vertical flow channel far from the injection molded part, which can accelerate the flow velocity of the coolant, improve the heat dissipation efficiency of the coolant, and take away the heat of the mold in time.

[0054] As the coolant flows, it moves to the bottom of the partition plate 32. At this time, the space increases, and this part of the space is also the space in the vertical flow channel closest to the injection molded part. The increase in space makes the flow velocity slower, which is beneficial for the coolant to absorb the heat of the injection molded part more fully, improve the heat exchange efficiency, and avoid local overheating of the injection molded part. Subsequently, the coolant moves to the other side of the partition plate 32 and flows upward.

[0055] Since the temperature difference between the third point and the fourth point is relatively large compared to the first and second points (because the coolant has absorbed heat and has a higher temperature when it reaches these two points), and the second telescopic rod 31 is located at the bottom of the vertical flow channel, this part of the space is closest to the injection molded part. Therefore, the second telescopic rod 31 expands due to heat, and then the telescopic end of the second telescopic rod 31 acts and pushes the partition plate 32 to move upward. At this time, the length of the acceleration space formed by the side wall of the partition plate 32 and the pipe wall of the water channel 13 decreases, and the space closest to the injection molded part at the bottom increases.

[0056] The shortening of the acceleration space causes the space below to increase. Although the path for fluid acceleration becomes shorter, the increase in the space below brings many positive effects. From a microscopic perspective, the increase in the space below changes the flow state of the coolant. In fluid mechanics, when the cross-sectional area of the flow channel increases, the flow velocity of the coolant will decrease accordingly. According to Bernoulli's principle, the decrease in flow velocity will increase the pressure of the fluid, which means that the coolant can contact the injection molded part with a higher pressure in the area closest to the injection molded part, enhancing the driving force of heat exchange.

[0057] At the same time, the larger space provides a more ample heat exchange space for the coolant. The coolant can contact the surface of the injection molded part more fully, increasing the collision frequency of coolant molecules microscopically and improving the heat conduction efficiency. This is crucial for precisely controlling the local temperature of the injection molded part and can effectively reduce problems such as internal stress concentration and deformation caused by local overheating or uneven cooling.

[0058] It should be noted that during the injection molding process, the thermal loads in different regions vary greatly. Through the synergistic effect of the second telescopic rod 31 and the partition plate 32 for dynamic adjustment, it is possible to accurately match the cooling requirements of each region. For the third and fourth points with higher temperatures, the coolant with an increased space below can absorb heat more efficiently, ensuring rapid cooling of these regions, reducing the temperature difference from other points, optimizing the temperature distribution inside the mold as a whole, making the temperature change of the injection molded part more uniform during the cooling process, greatly improving the quality of the injection molded part, reducing the defective rate, and enhancing the reliability and stability of production.

[0059] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0060] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A temperature-controlled injection mold, comprising a mold body (11), a surface of which is mounted a plurality of cooling circulation modules (12), characterized in that: A macro-adjustment component (2) is arranged inside the mold body (11), and the macro-adjustment component (2) comprises a plurality of heat-conducting pipes (21) fixedly connected to the inside of the mold body (11), and temperature difference spiral blades (24) are installed inside the heat-conducting pipes (21), and the temperature difference spiral blades (24) are composed of two metals with different thermal expansion coefficients, and the side of the heat-conducting pipes (21) close to the outside is slidably connected to a resistance plate (25), and the side of the heat-conducting pipes (21) away from the mold body (11) is rotatably connected to a contact plate (25). A trigger arm (26) is provided, and the trigger arm (26) is slidably connected to the surface of the resistance plate (25); an end of the trigger arm (26) away from the mold clamping body (11) is provided with a swing member (28); the trigger arm (26) is used to amplify the displacement of the resistance plate (25); the outside of the cooling circulation module (12) is connected to a flow valve (29); an end of the swing member (28) away from the heat conducting pipe (21) is mutually installed with a valve core of the flow valve (29); the swing member (28) provides a function of converting a swing force into a rotational force.

2. The temperature-controlled injection mold according to claim 1, characterized in that: The heat conducting tube (21) is in a shape that gradually tilts upwards; one end of the heat conducting tube (21) close to the mold body (11) is arranged in a gradually contracting shape; one end of the heat conducting tube (21) away from the mold body (11) is arranged in a gradually expanding shape; the trigger arm (26) is in an L shape, and its shorter side is slidably connected to the surface of the abutment plate (25), and the longer section is mounted on the swinging member (28); the contracted end of the heat conducting tube (21) is located in the middle of the mold cavity of the mold body (11).

3. The temperature-controlled injection mold according to claim 2, characterized in that: A plurality of placement grooves are provided on the surface of one end of the heat conducting pipe (21) close to the mold clamping body (11), and a pressure sleeve (22) is fixedly connected to the inside of each of the placement grooves.

4. The temperature-controlled injection mold according to claim 1, characterized in that: A spiral groove (23) which continuously contracts toward the outside is provided in the middle of the heat conducting pipe (21), and the temperature difference spiral sheet (24) is fixedly connected to the surface of the spiral groove (23).

5. The temperature-controlled injection mold according to claim 1, characterized in that: A plurality of telescopic rods (27) are fixedly connected inside the heat conducting pipe (21), and the output ends of the telescopic rods (27) are fixedly connected to the surface of the abutment plate (25).

6. The temperature-controlled injection mold according to claim 1, characterized in that: The swing member (28) comprises a swing frame, a slider, a slide column and an eccentric plate, the swing frame being fixedly connected to the outer surface of the trigger arm (26), the slider being slidably connected to the bottom of the swing frame, the slide column being fixedly connected to the bottom of the slider, the eccentric plate being fixedly connected to the valve core of the flow valve (29), and the eccentric plate being slidably connected to the outer surface of the slide column.

7. The temperature-controlled injection mold according to claim 1, characterized in that: The inner side of the temperature difference spiral blade (24) is made of brass, and the outer side is made of stainless steel.

8. The temperature-controlled injection mold according to claim 1, characterized in that: The mold body (11) is divided into an upper mold and a lower mold, and water channels (13) are symmetrically provided inside both molds. The cooling circulation module (12) is connected to the water channel (13) via a water pipe, and the flow valve (29) is located between the input end of the cooling circulation module (12) and the water pipe.

9. The temperature-controlled injection mold according to claim 8, characterized in that: A micro-adjustment component (3) is arranged inside the water channel (13); the macro-adjustment component (2) comprises a plurality of telescopic rods (31); the telescopic rods (31) are fixedly connected to the bottom of a side of the water channel (13) away from the input end; a partition (32) is fixedly connected to the top of the telescopic rods (31); the bottom of the partition (32) is arc-shaped and matches the flow direction of the water flow; the partition (32) is slidably connected to the inside of the water channel (13).

10. The temperature-controlled injection mold according to claim 9, characterized in that: A spring is fixedly connected between the fixed end and the telescopic end of the second telescopic rod (31), and the spring is made of a memory alloy.

Images