An injection mold for plastic parts that is easy to dissipate heat

Abstract

The present invention belongs to the technical field of plastic injection molding, and in particular, relates to an injection mold for plastic parts that is easy to dissipate heat, including an injection molding table, the upper end of which is fixedly connected to a lower mold, the position on the injection molding table located above the lower mold is vertically slidably connected to an upper mold, the upper end of the injection molding table is fixedly connected to a hydraulic cylinder for driving the upper mold; and a cooling and heat dissipation component, the cooling and heat dissipation component including a cooling cavity opened inside the injection molding table. The present invention sets a cooling and heat dissipation component and a flow rate regulating component for coordinated use, and controls the number of teeth on the first gear to adjust the suction and discharge amount of the cooling liquid by the first gear when rotating, so as to adjust the circulation flow rate of the cooling liquid according to the temperature of the lower mold, and adjust the heat dissipation rate of the mold in real time according to the temperature of the mold itself, so that the cooling and heat dissipation of the mold is more uniform, and the quality of the product is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic injection molding, and in particular relates to an injection mold for plastic parts which is easy to dissipate heat. Background Art

[0002] Injection molding, also known as injection molding, is a key component in the injection molding process for plastic parts. Injection molding is the process of injecting molten plastic into a mold and forming the required plastic parts through cooling and solidification. The design and function of the injection molding mold directly affects the quality and production efficiency of the final product.

[0003] During the injection molding process, a large amount of heat will be generated when the molten plastic is filled and solidified in the mold. If the mold does not have an effective heat dissipation system, the cooling and solidification time of the plastic will be prolonged, increasing the production cycle. At the same time, high temperature may also cause premature wear or damage to the mold material, affecting the service life of the mold. Therefore, it is necessary to set a heat dissipation mechanism in the injection molding mold, such as a plastic injection molding machine that can be quickly cooled disclosed in Chinese patent number CN211467382U, including a top plate, the bottom of the top plate is fixedly connected to a fixed cylinder, the internal rotation of the fixed cylinder is connected to a transmission block, the bottom of the transmission block is fixedly connected to a transmission shaft, the bottom of the fixed cylinder is fixedly connected to a top shell, and the outside of the top shell is fixedly connected to a heat dissipation barrel. The plastic injection molding machine is provided with a water pump at the bottom of the top plate, so that the device has the purpose of moving the water source, and the heat dissipation device is provided on the outside of the heat dissipation barrel to achieve the purpose of facilitating heat dissipation.

[0004] However, the above-mentioned plastic injection molding machine still has the following technical problems when in use:

[0005] After injection molding, when the mold is cooled and the heat dissipation is dissipated, the heat dissipation rate cannot be adjusted in real time, resulting in the initial stage of heat dissipation. Due to the large temperature difference between the mold and the cooling medium, the heat dissipation rate of the mold is too fast, and the plastic in the mold is cooled too quickly, resulting in greater stress inside the product. This stress may cause warping, deformation or cracking of the product in later use. In the subsequent stage of heat dissipation, due to the gradual reduction of the temperature difference between the mold and the cooling medium, the heat dissipation rate will continue to slow down, resulting in too long cooling time, reducing production efficiency, and may also cause large temperature differences in different parts of the mold, resulting in uneven cooling, affecting product quality and consistency. Summary of the invention

[0006] The purpose of the present invention is to address the problems raised in the above-mentioned background technology and to provide a plastic component injection mold that is easy to dissipate heat and can adjust the suction and discharge amount of cooling liquid by the first gear when it rotates by controlling the number of teeth on the first gear, so as to adjust the circulation flow rate of the cooling liquid according to the temperature of the lower mold.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A plastic component injection mold that is easy to dissipate heat, comprising:

[0009] An injection molding table, wherein a lower mold is fixedly connected to the upper end of the injection molding table, an upper mold is vertically slidably connected to the position above the lower mold on the injection molding table, and a hydraulic cylinder for driving the upper mold is fixedly connected to the upper end of the injection molding table;

[0010] A cooling and heat dissipation component, wherein the cooling and heat dissipation component comprises a cooling cavity opened inside the injection molding table, a spiral condensing coil is fixedly connected to the peripheral side wall of the cooling cavity, a lower flow cavity is opened inside the lower mold, a liquid inlet channel and a liquid discharge channel are respectively connected to the cooling cavity on both sides of the lower flow cavity, a first one-way valve is provided in the liquid inlet channel and the liquid discharge channel, an upper flow cavity matched with the lower flow cavity is opened inside the upper mold, a control cavity is opened inside the injection molding table, a first gear is rotatably connected inside the control cavity, a suction component driven by the first gear, and a driving component driving the first gear to rotate are provided inside the injection molding table;

[0011] A flow rate regulating component, the flow rate regulating component includes an arc-shaped cavity opened inside the first gear, the inner wall of the arc-shaped cavity is sealingly and slidably connected to a piston block, an arc-shaped rod is fixedly connected to the piston block, a plurality of teeth are movably connected to the peripheral side wall of the first gear, and a control component for controlling the retraction and extension of the plurality of teeth is provided between the arc-shaped rod and the teeth.

[0012] Preferably, the control component includes a first magnet fixedly connected to the arc rod, a plurality of control grooves are opened inside the first gear, the inner wall of each control groove is slidably connected with a sealing slider, a second spring is arranged between each sealing slider and the inner wall of the control groove, a second magnet is arranged on a side wall of each sealing slider close to the arc rod, each of the second magnets repels the first magnet with the same pole, each sealing slider is fixedly connected to the teeth at the corresponding position, and a plurality of grooves matching the teeth are opened on the peripheral side wall of the first gear.

[0013] Preferably, a heat transfer component is also included, which is used to automatically control the flow rate adjustment component according to the mold temperature. The heat transfer component includes a heat conduction groove opened at the center position of the first gear, one end of the arc cavity is connected to a spherical liquid storage cavity, and a heat conduction copper block is provided between the spherical liquid storage cavity and the heat conduction groove. A hollow rod is fixedly connected to the upper end of the first gear, and the hollow rod connects the heat conduction groove and the bottom wall of the lower mold.

[0014] Preferably, the hollow rod and the heat-conducting groove are filled with organic silicon liquid as a heat-conducting medium, and the space between the spherical liquid storage cavity and the piston block is filled with kerosene as a transmission medium.

[0015] Preferably, the suction component includes a suction channel opened inside the injection molding table and connected to the liquid inlet channel, a piston plate is slidably connected in the suction channel, a first spring is provided between the piston plate and the inner wall of the suction channel, a rack is fixedly connected to the piston plate, and the rack is meshed with the first gear.

[0016] Preferably, the driving component comprises a gear ring fixedly connected to the peripheral side wall of the hollow rod, a motor is fixedly connected to the inner top wall of the control cavity, and a second gear meshing with the gear ring is fixedly connected to the output end of the motor.

[0017] Preferably, it also includes a stirring component for stirring the cooling liquid to improve the heat dissipation effect of the circulating cooling liquid on the mold. The stirring component includes a rotating rod coaxially fixedly connected to the first gear, and the rotating rod extends to the side wall of the cooling chamber and is rotatably connected to the stirring rod.

[0018] Preferably, it also includes a liquid replacement component for continuously replacing the cooling liquid near the spiral condensing coil and the spiral away from the condensing coil, the liquid replacement component includes a bevel gear fixedly connected to the stirring rod, an intermittent bevel gear ring meshing with the bevel gear is fixedly connected to the inner wall of the cooling chamber, a liquid replacement cylinder is fixedly connected to the side wall of the rotating rod, a torsion spring is connected between the intermittent bevel gear ring and the liquid replacement cylinder, a liquid replacement block is sealingly and slidably connected in the liquid replacement cylinder, a threaded section is provided on the stirring rod, the liquid replacement block is threadedly connected to the threaded section, a liquid extraction port is opened at one end of the liquid replacement cylinder close to the spiral condensing coil, the liquid replacement cylinder is connected to a drain pipe close to the rotating rod, and a second one-way valve is provided in both the liquid extraction port and the drain pipe.

[0019] Compared with the existing technology, the advantages of the plastic parts injection mold that is easy to dissipate heat are:

[0020] The present invention sets a cooling and heat dissipation component and a flow rate regulating component for coordinated use, controls the number of teeth on the first gear, regulates the suction and discharge amount of the cooling liquid by the first gear when rotating, and is convenient to regulate the circulation flow rate of the cooling liquid according to the temperature of the lower mold. When the temperature of the lower mold is high, the temperature difference between the cooling liquid and the lower mold is large, and the cooling rate of the lower mold by the cooling liquid is fast. The number of teeth on the first gear is reduced by the expansion of kerosene, so that the circulation flow rate of the cooling liquid is reduced, and the heat dissipation rate of the mold is further reduced, so as to avoid the mold cooling too quickly in the initial stage of heat dissipation, resulting in warping, deformation or cracking of the product in the later use. When the temperature of the lower mold is low, the temperature difference between the cooling liquid and the lower mold is small, and the cooling rate of the lower mold by the cooling liquid is slow. The number of teeth on the first gear is increased by the contraction of kerosene, and the heat dissipation rate of the mold is improved, so as to avoid the mold cooling too slowly in the subsequent stage of heat dissipation, resulting in too long cooling time and reduced production efficiency. The heat dissipation rate of the mold can be adjusted in real time according to the temperature of the mold itself, so that the cooling and heat dissipation of the mold is more uniform, and the quality of the product is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 is a cross-sectional view of the present invention;

[0023] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0024] Figure 4 is a cross-sectional view of the suction component of the present invention;

[0025] Figure 5 is a top view of the flow rate regulating component in the present invention;

[0026] Figure 6 yes Figure 5 The enlarged view of point B in the middle;

[0027] Figure 7 It is a cross-sectional view of the fluid changing component in the present invention.

[0028] In the figure: 1, injection molding table; 11, lower mold; 12, upper mold; 13, hydraulic cylinder; 2, cooling and heat dissipation component; 21, cooling chamber; 22, spiral condensing coil; 23, lower flow chamber; 24, liquid inlet channel; 25, liquid discharge channel; 26, upper flow chamber; 27, control chamber; 28, first gear; 3, suction component; 31, suction channel; 32, piston plate; 33, first spring; 34, rack; 4, driving component; 41, gear ring; 42, motor; 43, second gear; 5, flow rate adjustment component; 51, arc chamber; 52, piston block; 53. Arc rod; 54. Teeth; 6. Control component; 61. First magnet; 62. Control groove; 63. Sealing slider; 64. Second spring; 65. Second magnet; 66. Groove; 7. Heat transfer component; 71. Heat conduction groove; 72. Spherical liquid storage chamber; 73. Heat conduction copper block; 74. Hollow rod; 8. Stirring component; 81. Rotating rod; 82. Stirring rod; 9. Liquid changing component; 91. Bevel gear; 92. Intermittent bevel gear ring; 93. Liquid changing cylinder; 94. Torsion spring; 95. Liquid changing block; 96. Threaded section; 97. Liquid extraction port; 98. Liquid discharge pipe. DETAILED DESCRIPTION

[0029] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0030] Example: Refer to Figures 1 to 7 , a plastic component injection mold that is easy to dissipate heat, comprising:

[0031] The injection molding table 1 has a lower mold 11 fixedly connected to its upper end, an upper mold 12 vertically slidably connected to the position above the lower mold 11 on the injection molding table 1 , and a hydraulic cylinder 13 for driving the upper mold 12 fixedly connected to its upper end.

[0032] The cooling and heat dissipation component 2 includes a cooling chamber 21 opened inside the injection molding table 1, a spiral condensing coil 22 is fixedly connected to the peripheral side wall of the cooling chamber 21, a lower flow chamber 23 is opened in the lower mold 11, and a liquid inlet channel 24 and a liquid discharge channel 25 are respectively connected to the cooling chamber 21 on both sides of the lower flow chamber 23, and a first one-way valve is provided in the liquid inlet channel 24 and the liquid discharge channel 25. An upper flow chamber 26 matching the lower flow chamber 23 is opened in the upper mold 12, a control chamber 27 is opened inside the injection molding table 1, and a first gear 28 is rotatably connected inside the control chamber 27. A suction component 3 driven by the first gear 28 and a driving component 4 driving the first gear 28 to rotate are provided inside the injection molding table 1.

[0033] In actual use, the hydraulic cylinder 13 can drive the upper mold 12 to move down to fit tightly with the lower mold 11, ensuring that the cooling liquid can flow in the upper flow cavity 26 and the lower flow cavity 23. At the same time, an injection port is provided at the top of the upper mold 12 to ensure the injection molding work.

[0034] The suction component 3 includes a suction channel 31 opened inside the injection molding table 1 and connected to the liquid inlet channel 24. A piston plate 32 is slidably connected in the suction channel 31. A first spring 33 is provided between the piston plate 32 and the inner wall of the suction channel 31. A rack 34 is fixedly connected to the piston plate 32. The rack 34 and the first gear 28 are meshed with each other. Through the arrangement of the suction component 3, the rack 34 can be periodically driven to translate during the rotation of the first gear 28, and the rack 34 can be reversely translated and reset under the elastic force of the first spring 33, and the piston plate 32 is driven to reciprocate in the suction channel 31 through the rack 34. The cooling liquid in the liquid inlet channel 24 is continuously pumped into the suction channel 31, and the cooling liquid in the suction channel 31 is continuously discharged back into the liquid inlet channel 24. Under the action of the first one-way valve, the cooling liquid circulates in the cooling chamber 21, the liquid inlet channel 24, the lower flow chamber 23, the upper flow chamber 26 and the discharge channel 25. The cooling liquid in the cooling chamber 21 is continuously cooled by the spiral condensation coil 22, so that the cooling liquid can circulate back and forth to cool the lower mold 11 and the upper mold 12, thereby ensuring the cooling effect of the cooling liquid on the lower mold 11 and the upper mold 12.

[0035] The driving component 4 includes a gear ring 41 fixedly connected to the side wall of the hollow rod 74, a motor 42 is fixedly connected to the inner top wall of the control chamber 27, and a second gear 43 meshing with the gear ring 41 is fixedly connected to the output end of the motor 42. The first gear 28 can be driven to rotate by the driving component 4, thereby ensuring the working operation of the cooling and heat dissipation component 2.

[0036] The flow rate regulating component 5 includes an arc-shaped cavity 51 opened inside the first gear 28, the inner wall of the arc-shaped cavity 51 is sealingly and slidably connected to a piston block 52, an arc-shaped rod 53 is fixedly connected to the piston block 52, a plurality of teeth 54 are movably connected to the peripheral side wall of the first gear 28, and a control component 6 for controlling the retraction and extension of the plurality of teeth 54 is provided between the arc-shaped rod 53 and the teeth 54.

[0037] The control component 6 includes a first magnet 61 fixedly connected to the arc rod 53, and a plurality of control grooves 62 are provided inside the first gear 28. The inner wall of each control groove 62 is slidably connected with a sealing slider 63, and a second spring 64 is provided between each sealing slider 63 and the inner wall of the control groove 62. A second magnet 65 is provided on a side wall of each sealing slider 63 close to the arc rod 53, and each second magnet 65 repels the first magnet 61 with the same pole. Each sealing slider 63 is fixedly connected to the tooth 54 at the corresponding position, and a plurality of grooves 66 matching the tooth 54 are provided on the peripheral side wall of the first gear 28.

[0038] It also includes a heat transfer component 7 for automatically controlling the flow rate regulating component 5 according to the mold temperature. The heat transfer component 7 includes a heat conduction groove 71 opened at the center of the first gear 28. One end of the arc cavity 51 is connected to a spherical liquid storage cavity 72. A heat conduction copper block 73 is provided between the spherical liquid storage cavity 72 and the heat conduction groove 71. A hollow rod 74 is fixedly connected to the upper end of the first gear 28. The hollow rod 74 connects the heat conduction groove 71 and the bottom wall of the lower mold 11.

[0039] The hollow rod 74 and the heat-conducting groove 71 are filled with silicone liquid as a heat-conducting medium. The silicone liquid has a high thermal conductivity and a low temperature property, and is widely used in the field of heat conduction. The spherical liquid storage chamber 72 and the piston block 52 are filled with kerosene as a transmission medium. The hydraulic oil has the property of thermal expansion and contraction, and the number of teeth 54 on the first gear 28 can be controlled in real time according to the temperature.

[0040] In view of the problem that the heat dissipation rate cannot be adjusted in real time in the prior art, resulting in the mold heat dissipation rate being too fast in the initial stage of heat dissipation, generating large stress inside the product, causing warping, deformation or cracking, and the heat dissipation rate being continuously slowed down in the subsequent stage of heat dissipation, thereby reducing production efficiency, the present invention sets a cooling and heat dissipation component 2 and a flow rate adjustment component 5 for coordinated use, and controls the number of teeth 54 on the first gear 28 to adjust the suction and discharge amount of the cooling liquid by the first gear 28 during rotation, so as to adjust the circulation flow rate of the cooling liquid according to the temperature of the lower mold 11. The specific adjustment method is as follows:

[0041] It is noted in advance that the silicone liquid in the heat-conducting groove 71 and the hollow rod 74 can transfer the heat of the lower mold 11 to the spherical liquid storage cavity 72 through the heat-conducting copper block 73, thereby adjusting the temperature of the kerosene in the spherical liquid storage cavity 72 in real time according to the temperature of the lower mold 11.

[0042] When the temperature of the lower mold 11 is high, the temperature difference between the cooling liquid and the lower mold 11 is large, and the cooling rate of the lower mold 11 by the cooling liquid is fast. At this time, the volume of the kerosene expands, pushing the piston block 52 to slide in the arc cavity 51, so that the first magnet 61 on the arc rod 53 corresponds to the fewer second magnets 65, and then the fewer teeth 54 extend out of the groove 66 under the action of the magnetic repulsion force, so that the first gear 28 drives the rack 34 to move a smaller distance each time it rotates, so that the piston plate 32 sucks less cooling liquid each time it reciprocates, so that the circulation flow rate of the cooling liquid is reduced, and the heat dissipation rate of the mold is further reduced, avoiding the initial stage of heat dissipation. In the above stage, the mold cools down too quickly, which causes the product to warp, deform or crack in the later use. It should be noted that the stress generated by the expansion of the kerosene volume mainly acts on the piston block 52 to push it to move, while the pressure generated on the sealing slider 63 is not enough to significantly compress the second spring 64, so that the teeth 54 extend to the outside of the groove 66, so as to ensure that the teeth 54 corresponding to the arc cavity 51 on one side of the kerosene are located on the inner side of the groove 66, and at the same time ensure that the teeth 54 corresponding to the arc cavity 51 on the other side of the kerosene can overcome the elastic force of the second spring 64 under the magnetic repulsion of the first magnet 61 and the second magnet 65, so as to extend out of the groove 66.

[0043] When the temperature of the lower mold 11 is low, the temperature difference between the cooling liquid and the lower mold 11 is small, and the cooling rate of the lower mold 11 by the cooling liquid is slow. The volume contraction of the kerosene pushes the piston block 52 to slide in the arc cavity 51 in the opposite direction, so that the first magnet 61 on the arc rod 53 corresponds to more second magnets 65, and more teeth 54 extend out of the groove 66 under the action of magnetic repulsion, so that the first gear 28 drives the rack 34 to move a larger distance each time it rotates, so that the piston plate 32 draws more cooling liquid each time it reciprocates, thereby improving the heat dissipation rate of the mold and avoiding the subsequent stage of heat dissipation. The mold is cooled too slowly, resulting in a long cooling time and reduced production efficiency.

[0044] In addition, when the rack 34 meshes with the teeth 54, the rack 34 will generate an oblique thrust on the teeth 54. The magnetic repulsion between the first magnet 61 and the second magnet 65 is much larger than the sum of the elastic force of the second spring 64 and the oblique thrust. Therefore, the adjustment of the number of teeth 54 on the first gear 28 is ensured, and the adjustment of the moving distance of the rack 34 can be achieved.

[0045] In summary, the heat dissipation rate of the mold can be adjusted in real time according to the temperature of the mold itself, so that the cooling and heat dissipation of the mold is more uniform, thereby improving the quality of the product.

[0046] It also includes a stirring component 8, which is used to stir the cooling liquid to improve the heat dissipation effect of the circulating cooling liquid on the mold. The stirring component 8 includes a rotating rod 81 coaxially fixedly connected to the first gear 28, and the rotating rod 81 extends to the side wall of the cooling chamber 21 and is rotatably connected to a stirring rod 82.

[0047] It is worth mentioning that during the rotation of the first gear 28, the rotating rod 81 will be driven to rotate synchronously, so that the stirring rod 82 thereon will move in a circular motion, stirring the cooling liquid in the cooling chamber 21, so that the cooling liquid is fully in contact with the spiral condensation coil 22, thereby improving the cooling effect on the cooling liquid and further improving the cooling effect on the mold.

[0048] It also includes a liquid replacement component 9, which is used to continuously replace the cooling liquid near the spiral condensing coil 2 and away from the spiral condensing coil 22. The liquid replacement component 9 includes a bevel gear 91 fixedly connected to the stirring rod 82, an intermittent bevel gear ring 92 meshing with the bevel gear 91 is fixedly connected to the inner wall of the cooling chamber 21, a liquid replacement cylinder 93 is fixedly connected to the side wall of the rotating rod 81 through a connecting rod, a torsion spring 94 is connected between the intermittent bevel gear ring 92 and the liquid replacement cylinder 93, a liquid replacement block 95 is sealed and slidably connected in the liquid replacement cylinder 93, a threaded section 96 is provided on the stirring rod 82, the liquid replacement block 95 is threadedly connected to the threaded section 96, a liquid extraction port 97 is provided at one end of the liquid replacement cylinder 93 close to the spiral condensing coil 22, the liquid replacement cylinder 93 is connected to a drain pipe 98 close to the rotating rod 81, and a second one-way valve is provided in both the liquid extraction port 97 and the drain pipe 98.

[0049] Among them, relative rotation can occur between the liquid changing cylinder 93 fixed by a connecting rod on the rotating rod 81 and the stirring rod 82 rotatably connected to the rotating rod 81, ensuring that the liquid changing block 95 can be horizontally displaced in the liquid changing cylinder 93. At the same time, since the threaded section 96 is a unidirectional setting, it is sealed between it and the liquid changing block 95, ensuring the suction effect of the cooling liquid when the liquid changing block 95 moves.

[0050] In addition, during the circular motion of the stirring rod 82, since the bevel gear 91 will perform a circular motion along the intermittent bevel gear ring 92, it can drive the stirring rod 82 to intermittently rotate, and under the action of the torsion spring 94, the stirring rod 82 can rotate in the opposite direction to return to the initial state, so that the stirring rod 82 drives the threaded section 96 thereon to rotate reciprocatingly in the opposite direction, thereby driving the liquid changing block 95 to perform reciprocating horizontal displacement in the liquid changing cylinder 93, reciprocatingly pumping the cooling liquid close to the side of the spiral condensation coil 22 into the liquid changing cylinder 93, and reciprocatingly discharging it to the side away from the spiral condensation coil 22, so that the cooling liquid in the cooling chamber 21 continuously impacts the surrounding area from the middle position, thereby improving the cooling effect of the spiral condensation coil 22 on the cooling liquid, so that the spiral condensation coil 22 can reduce the cooling liquid to a constant low temperature state, ensuring that when the temperature of the lower mold 11 is reduced, the temperature difference between it and the cooling liquid is continuously reduced, thereby ensuring that the above-mentioned flow rate regulating component 5 can position the heat dissipation rate in a more suitable state, so that the cooling effect of the mold is more uniform.

[0051] The present invention can be explained by the following operation mode:

[0052] In actual use, the hydraulic cylinder 13 drives the upper mold 12 to move down to fit tightly with the lower mold 11, ensuring that the cooling liquid can flow in the upper flow cavity 26 and the lower flow cavity 23. At the same time, an injection port is provided at the top of the upper mold 12 to ensure the injection work.

[0053] The first gear 28 is driven to rotate by the motor 42, and the rack 34 is periodically driven to translate, and the rack 34 can be translated and reset in the opposite direction under the elastic force of the first spring 33, and the piston plate 32 is driven to move back and forth in the suction channel 31 by the rack 34, so that the cooling liquid can circulate in the cooling chamber 21, the liquid inlet channel 24, the lower flow chamber 23, the upper flow chamber 26 and the liquid discharge channel 25, and the cooling liquid in the cooling chamber 21 is continuously cooled by the spiral condensing coil 22;

[0054] When the temperature of the lower mold 11 is high, the temperature difference between the cooling liquid and the lower mold 11 is large, and the cooling rate of the lower mold 11 by the cooling liquid is fast. At this time, the kerosene expands, pushing the piston block 52 to slide in the arc cavity 51, so that fewer teeth 54 extend out of the groove 66 under the action of the magnetic repulsion force, so that the first gear 28 drives the rack 34 to move a smaller distance each time it rotates, so that the piston plate 32 sucks less cooling liquid each time it reciprocates, thereby reducing the circulation flow rate of the cooling liquid;

[0055] When the temperature of the lower mold 11 is low, the temperature difference between the cooling liquid and the lower mold 11 is small, and the cooling rate of the lower mold 11 by the cooling liquid is slow. The contraction of kerosene pushes the piston block 52 to slide in the arc cavity 51 in the opposite direction, so that more teeth 54 extend out of the groove 66 under the action of the magnetic repulsion force, so that the first gear 28 drives the rack 34 to move a larger distance each time it rotates, so that the piston plate 32 draws more cooling liquid each time it reciprocates, thereby improving the heat dissipation rate of the mold.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plastic parts injection mold that is easy to dissipate heat, characterized in that: include: An injection molding table (1), wherein a lower mold (11) is fixedly connected to the upper end of the injection molding table (1), an upper mold (12) is vertically slidably connected to a position above the lower mold (11) on the injection molding table (1), and a hydraulic cylinder (13) for driving the upper mold (12) is fixedly connected to the upper end of the injection molding table (1); A cooling and heat dissipation component (2), the cooling and heat dissipation component (2) comprising a cooling chamber (21) provided inside an injection molding table (1), a spiral condensing coil (22) being fixedly connected to a peripheral side wall of the cooling chamber (21), a lower flow chamber (23) provided inside the lower mold (11), a liquid inlet channel (24) and a liquid discharge channel (25) being respectively connected to the cooling chamber (21) on both sides of the lower flow chamber (23), a first one-way valve being provided inside the liquid inlet channel (24) and the liquid discharge channel (25), an upper flow chamber (26) matching the lower flow chamber (23) being provided inside the upper mold (12), a control chamber (27) being provided inside the injection molding table (1), a first gear (28) being rotatably connected inside the control chamber (27), a suction component (3) driven by the first gear (28), and a driving component (4) driving the first gear (28) to rotate being provided inside the injection molding table (1); A flow rate regulating assembly (5), the flow rate regulating assembly (5) comprising an arc-shaped cavity (51) opened inside a first gear (28), a piston block (52) being sealingly and slidably connected to the inner wall of the arc-shaped cavity (51), an arc-shaped rod (53) being fixedly connected to the piston block (52), a plurality of teeth (54) being movably connected to the peripheral side wall of the first gear (28), and a control component (6) for controlling the retraction and extension of the plurality of teeth (54) being provided between the arc-shaped rod (53) and the teeth (54); The control component (6) comprises a first magnet (61) fixedly connected to the arc-shaped rod (53); a plurality of control grooves (62) are provided inside the first gear (28); a sealing slider (63) is slidably connected to the inner wall of each control groove (62); a second spring (64) is provided between each sealing slider (63) and the inner wall of the control groove (62); a second magnet (65) is provided on a side wall of each sealing slider (63) close to the arc-shaped rod (53); each second magnet (65) has the same polarity as the first magnet (61) and repels each other; each sealing slider (63) is fixedly connected to a tooth (54) at a corresponding position; and a plurality of grooves (66) matching the tooth (54) are provided on the peripheral side wall of the first gear (28); It also includes a heat transfer component (7) for automatically controlling the flow rate regulating component (5) according to the mold temperature, the heat transfer component (7) including a heat conduction groove (71) opened at the center of the first gear (28), one end of the arc cavity (51) is connected to a spherical liquid storage cavity (72), a heat conduction copper block (73) is provided between the spherical liquid storage cavity (72) and the heat conduction groove (71), and the upper end of the first gear (28) is fixedly connected to a hollow rod (74), and the hollow rod (74) is connected to the heat conduction groove (71) and the bottom wall of the lower mold (11); The interior of the hollow rod (74) and the heat-conducting groove (71) is filled with organic silicon liquid as a heat-conducting medium, and the space between the spherical liquid storage cavity (72) and the piston block (52) is filled with kerosene as a transmission medium.

2. The plastic component injection mold that is easy to dissipate heat according to claim 1, characterized in that: The suction component (3) comprises a suction channel (31) opened inside the injection molding table (1) and connected to the liquid inlet channel (24); a piston plate (32) is slidably connected inside the suction channel (31); a first spring (33) is provided between the piston plate (32) and the inner wall of the suction channel (31); a rack (34) is fixedly connected to the piston plate (32); the rack (34) and the first gear (28) are meshed with each other.

3. The plastic component injection mold that is easy to dissipate heat according to claim 1, characterized in that: The driving component (4) comprises a toothed ring (41) fixedly connected to the peripheral side wall of the hollow rod (74), a motor (42) fixedly connected to the inner top wall of the control chamber (27), and a second gear (43) meshing with the toothed ring (41) fixedly connected to the output end of the motor (42).

4. The plastic component injection mold that is easy to dissipate heat according to claim 1, characterized in that: It also includes a stirring assembly (8) for stirring the cooling liquid to improve the heat dissipation effect of the circulating cooling liquid on the mold, the stirring assembly (8) including a rotating rod (81) coaxially fixedly connected to the first gear (28), the rotating rod (81) extending to the side wall of the cooling chamber (21) and rotatably connected to a stirring rod (82).

5. The plastic component injection mold for easy heat dissipation according to claim 4, characterized in that: The invention also comprises a liquid replacement component (9) for continuously replacing the cooling liquid near the spiral condensing coil (22) and away from the spiral condensing coil (22), wherein the liquid replacement component (9) comprises a bevel gear (91) fixedly connected to the stirring rod (82), an intermittent bevel gear ring (92) meshing with the bevel gear (91) is fixedly connected to the inner wall of the cooling chamber (21), a liquid replacement cylinder (93) is fixedly connected to the side wall of the rotating rod (81), and a space between the intermittent bevel gear ring (92) and the liquid replacement cylinder (93) is provided. A torsion spring (94) is connected, a liquid changing block (95) is sealingly and slidably connected inside the liquid changing cylinder (93), a threaded section (96) is provided on the stirring rod (82), and the liquid changing block (95) is threadedly connected to the threaded section (96), a liquid extraction port (97) is provided at one end of the liquid changing cylinder (93) close to the spiral condensing coil (22), the liquid changing cylinder (93) is connected to a liquid discharge pipe (98) close to the rotating rod (81), and a second one-way valve is provided in both the liquid extraction port (97) and the liquid discharge pipe (98).

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