Injection mold with easy-to-maintain cooling system

Abstract

The present application relates to the field of mold bases, and specifically discloses an injection mold with an easy-to-maintain cooling system, which includes a mold base mechanism, a fixed mold, a movable mold, and a water-changing valve mechanism. The mold base mechanism includes a base and two water-changing components arranged opposite to each other; the water-changing component includes a plurality of vertical pipes installed on the base at vertical intervals, one end of the vertical pipe has an opening, the other end is closed, and the open end is connected to the base; the fixed mold and the movable mold are both arranged between the two water-changing components; the fixed mold is provided with a first molding cavity at one end facing the movable mold, and the movable mold is provided with a second molding cavity at one end facing the fixed mold; the side walls of the fixed mold and the movable mold are both provided with a plurality of guide grooves corresponding to the plurality of vertical pipes, and the vertical pipes are arranged in the corresponding guide grooves; cold water cavities are provided in the fixed mold and the movable mold, and a water-changing pipe is connected between the cold water cavity and the guide groove; a water-changing valve mechanism for plugging and connecting with the water-changing pipe is provided on the vertical pipe. The present application optimizes the overall structure of the cooling system and is conducive to the maintenance of the cooling system.

Description

Technical Field

[0001] The present application relates to the field of mold bases, and in particular to an injection mold with an easy-to-maintain cooling system. Background Art

[0002] At present, injection molds are widely used in the plastic processing industry. Their main function is to inject molten plastic into the mold cavity through an injection molding machine, and obtain plastic products of the desired shape after cooling and solidification. During the injection molding process, the cooling system of the mold has an important impact on the molding quality and production efficiency of the product.

[0003] In the related art, the cooling system of the injection mold usually includes a water inlet hose, a water outlet hose and multiple cooling pipes. The multiple cooling pipes are distributed in the mold, and the liquid inlet ends of the multiple cooling pipes are connected to the liquid outlet ends of the water inlet hoses, and the liquid outlet ends of the multiple cooling pipes are connected to the liquid inlet ends of the water outlet hoses. Cold water is transported into the cooling pipes through the water inlet hoses, and the cooling pipes discharge water through the water outlet hoses. The water inlet hoses and the water outlet hoses cooperate with the opening and closing actions of the mold through their own hose structures.

[0004] The above-mentioned related technologies have the following defects: the above-mentioned cooling system needs to lay a large number of water inlet hoses, water outlet hoses and cooling pipes, and has a complex structure and is difficult to maintain. Summary of the invention

[0005] In order to make the cooling system easy to maintain, the present application provides an injection mold with a cooling system that is easy to maintain.

[0006] The present application provides an injection mold with an easy-to-maintain cooling system, which adopts the following technical solution: An injection mold with an easy-to-maintain cooling system, comprising a mold base mechanism, a fixed mold, a movable mold and a water-changing valve mechanism, wherein the mold base mechanism comprises a base and two water-changing components, and the two water-changing components are arranged opposite to each other; The water changing assembly comprises a plurality of vertical pipes, one end of the vertical pipe has an opening, the other end is closed, and the open end is connected to the base, and the plurality of vertical pipes are vertically spaced and distributed on the base; The fixed mold and the movable mold are both arranged between the two water changing components, and the fixed mold is arranged between the movable mold and the base, and is connected to the base; The fixed mold has a first molding cavity at one end facing the movable mold, and the movable mold has a second molding cavity at one end facing the fixed mold; The side walls of the fixed mold and the movable mold are both provided with a plurality of guide grooves corresponding to the plurality of vertical tubes, the guide grooves are arranged along the length direction of the vertical tubes, and the vertical tubes are arranged in the corresponding guide grooves; A cold water cavity is provided in the fixed mold and the movable mold, and a water exchange pipe is provided on the fixed mold and the movable mold, wherein the first end of the water exchange pipe is connected to the bottom of the guide groove, and the second end is connected to the cold water cavity; The vertical pipe is provided with a water exchange valve mechanism corresponding to the water exchange pipe, and the water exchange valve mechanism is arranged in the guide groove; The water exchange valve mechanism is telescopically mounted on the vertical pipe, and the water outlet end of the water exchange valve mechanism is used for plug-in connection with the first end of the water exchange pipe.

[0007] By adopting the above technical solution, the movable mold slides on multiple vertical tubes and then approaches the fixed mold. After the mold is closed, hot-melt plastic is injected into the first molding cavity and the second molding cavity. When the mold needs to be cooled, the vertical tube of one water-changing component is used for water inlet to the cold water cavity, and the vertical tube of the other water-changing component is used for water outlet to the cold water cavity. When the mold is just closed, the water-changing valve mechanism is just arranged opposite to the first end of the water-changing pipe, and then the water-changing valve mechanism is extended so that the outlet end of the water-changing valve mechanism is plug-connected with the first end of the water-changing pipe, and the water-changing valve mechanism is opened so that the vertical tube is connected with the cold water cavity, so that the cold water cavity can be respectively in and out of cold water through the two water-changing components. After the cooling of the mold is completed, the water-changing valve mechanism shrinks, and the connection between the water-changing valve mechanism and the water-changing pipe is released before the mold is opened. In the present application, a vertical pipe is used as a guide shaft of the movable mold and an inlet and outlet pipe of the cold water chamber, so that one pipe can be used for multiple purposes. Moreover, compared with multiple cooling pipes, the cold water chamber has a simple structure, thereby simplifying the mold structure. At the same time, the vertical pipe is connected to the water changing valve mechanism and the water changing pipe by plugging, so that the connection and separation between the vertical pipe and the cold water chamber are convenient and quick, and then the cold water chamber, the vertical pipe, the water changing pipe and the water changing valve mechanism cooperate with each other, thereby optimizing the overall structure of the cooling system and facilitating the maintenance of the cooling system.

[0008] Optionally, the water exchange valve mechanism includes a guide tube, a movable insert tube and a sealing plug, and the side wall of the vertical tube is provided with a guide hole; The guide tube is disposed in the guide tube, is coaxial with the guide hole, and is connected to the guide tube at the guide hole; The movable cannula comprises a trumpet tube and a straight tube, wherein the straight tube is coaxially arranged in the guide tube and is slidably connected with the guide tube in the length direction of the guide tube; The bell tube is arranged between the straight tube and the corresponding water exchange tube, the end with a larger diameter of the bell tube is connected to the straight tube, and the end with a smaller diameter is used for plugging with the first end of the corresponding water exchange tube; The diameter of the sealing plug is smaller than the inner diameter of the straight tube. In the length direction of the guide tube, the sealing plug is movably arranged in the movable insert tube to seal the end of the trumpet tube with a smaller diameter.

[0009] By adopting the above technical solution, after the mold is closed, when the water exchange valve mechanism needs to be plugged and connected with the first end of the water exchange pipe, the guide pipe moves toward the first end of the water exchange pipe, so that the end of the trumpet pipe with a smaller diameter is inserted into the water exchange pipe, and the plug-in connection between the movable plug and the first end of the water exchange pipe is realized. Then the sealing plug is moved away from the trumpet pipe, so that the water exchange valve mechanism is opened and connected with the water exchange pipe.

[0010] Optionally, the water exchange valve mechanism further includes a spring rod and a push rod, wherein the push rod is arranged in the first end of the water exchange pipe, and one end of the push rod is connected to the water exchange pipe, and the other end is used to abut against the sealing plug; The spring rod is arranged in the straight pipe and at one end of the sealing plug away from the water exchange pipe, and one end is connected to the sealing plug and the other end is connected to the straight pipe.

[0011] By adopting the above technical solution, after the movable plug is plugged into the first end of the water exchange pipe, the push rod will push the sealing plug into the straight pipe to open the water exchange valve mechanism. After the movable plug is separated from the water exchange pipe, the sealing plug can be reset to block the trumpet pipe under the action of the spring rod, thereby making the opening and closing of the water exchange valve mechanism convenient and quick.

[0012] Optionally, a first mesh plate is connected between the top rod and the water exchange pipe.

[0013] By adopting the above technical solution, the first mesh plate can connect the top rod and the water exchange pipe without hindering the water flow between the top rod and the water exchange pipe.

[0014] Optionally, a second mesh plate is connected between the spring rod and the straight tube.

[0015] By adopting the above technical solution, the second mesh plate can connect the spring rod and the straight tube without hindering the water flow between the spring rod and the straight tube.

[0016] Optionally, the water exchange valve mechanism further includes a telescopic assembly, the telescopic assembly including a side tube, a piston and a connecting shaft, the side tube is installed on the outer side wall of the vertical tube, is coaxial with the straight tube, and is also connected to the vertical tube; The piston is installed inside the side tube and is dynamically sealed with the side tube. One end of the connecting shaft is connected to the piston, and the other end is connected to the second mesh plate.

[0017] By adopting the above technical solution, the piston is driven to move in the side tube, thereby driving the movable inserting tube to approach or move away from the water changing pipe.

[0018] Optionally, the water exchange valve mechanism further includes a limit mesh plate and a limit ring, wherein the limit mesh plate is arranged on a side of the piston away from the vertical pipe and connected to the side pipe; The limiting ring is sleeved on the connecting shaft, located on a side of the piston away from the limiting mesh plate, and connected to the side tube.

[0019] By adopting the above technical solution, the limiting mesh plate and the limiting ring are used to limit the position of the piston so that the piston will not separate from the side tube.

[0020] Optionally, the water exchange valve mechanism further includes a magnetic member and an electromagnet, wherein the magnetic member is disposed in the side tube and connected to an end of the piston away from the connecting shaft; The electromagnet is installed at one end of the limiting mesh plate away from the piston.

[0021] By adopting the above technical solution, the piston slides in the side tube by adsorbing or repelling the magnetic part through the electromagnet.

[0022] Optionally, the water changing valve mechanism further comprises a spring and a limiting rod, wherein the limiting rod is coaxially arranged in the side tube, and is located between the piston and the limiting mesh plate, and is connected to the limiting mesh plate; The spring is sleeved on the limiting rod, one end of the spring is connected to the limiting mesh plate, and the other end is connected to the piston.

[0023] By adopting the above technical solution, when the movable plug moves toward the water-changing pipe, the spring is gradually stretched until the movable plug is plugged and connected with the water-changing pipe. When the connection between the movable plug and the water-changing pipe needs to be released, the electromagnet is turned off, and under the resetting action of the spring, the trumpet end of the movable plug can be completely immersed in the guide pipe, the connection between the movable plug and the water-changing pipe is released, and the movable plug will not interfere with the movement of the fixed mold and the fixed mold.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. In the present application, the vertical pipe is used as the guide shaft of the movable mold and the inlet and outlet pipes of the cold water chamber, which can be used for multiple purposes. Compared with multiple cooling pipes, the cold water chamber has a simple structure, thereby simplifying the mold structure. At the same time, the vertical pipe is connected to the water exchange valve mechanism and the water exchange pipe by plugging, so that the connection and separation between the vertical pipe and the cold water chamber are convenient and quick, and then the cold water chamber, the vertical pipe, the water exchange pipe and the water exchange valve mechanism cooperate with each other, thereby optimizing the overall structure of the cooling system and facilitating the maintenance of the cooling system.

[0025] 2. In the present application, the electromagnet absorbs or repels the magnetic part to make the piston slide in the side tube, and the piston is driven to move in the side tube, thereby driving the movable plug-in tube to approach or move away from the water exchange tube, thereby realizing the plug-in connection and separation between the movable plug-in tube and the water exchange tube.

[0026] 3. In the present application, after the plug-in connection between the movable plug-in tube and the first end of the water-changing tube is established, the push rod will push the sealing plug into the straight tube to open the water-changing valve mechanism. After the movable plug-in tube is separated from the water-changing tube, the sealing plug can be reset to block the trumpet tube under the action of the spring rod, thereby making the opening and closing of the water-changing valve mechanism convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a schematic diagram of a top view of the structure of an embodiment of the present application; Figure 3 is along Figure 2 Schematic diagram of the cross-sectional structure along the AA line; Figure 4 is along Figure 2 Schematic diagram of the cross-sectional structure along the middle BB line; Figure 5 yes Figure 4 Enlarged schematic diagram of part A.

[0029] Reference numerals: 1. Die base mechanism; 11. Base; 12. Top plate; 13. water changing assembly; 131. vertical pipe; 13101. guide hole; 14. Three-way water inlet valve; 15. Water pump; 2. Fixed mold; 20. First molding cavity; 201. Guide groove; 202. Cold water cavity; 3. Moving mold; 30. Second molding cavity; 40. Replace water pipes; 4. Water change valve mechanism; 41. guide tube; 42. movable insert tube; 421. trumpet tube; 422. straight tube; 43. sealing plug; 44. spring rod; 45. ejector rod; 451. first mesh plate; 46. ​​Telescopic assembly; 460. Side pipe; 461. Limiting mesh plate; 462. Limiting ring; 463. Piston; 464. Connecting shaft; 465. Second mesh plate; 466. Magnetic part; 467. Electromagnet; 468. Spring; 469. Limiting rod. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-5 This application is described in further detail.

[0031] The present application embodiment discloses an injection mold with an easy-to-maintain cooling system. Figure 1 , an injection mold with an easy-to-maintain cooling system, comprising a mold base mechanism 1, a fixed mold 2, a movable mold 3 and a water-changing valve mechanism 4, wherein the mold base mechanism 1 comprises a base 11, a top plate 12, a three-way water inlet valve 14, a water pump 15 and two water-changing components 13, wherein the top plate 12 is arranged directly above the base 11, and the two water-changing components 13 are arranged relatively between the base 11 and the top plate 12. The water-changing component 13 comprises a plurality of vertical pipes 131, wherein one end of the vertical pipe 131 has an opening and the other end is closed, and the open end is connected to the base 11, and the plurality of vertical pipes 131 are vertically spaced and distributed on the base 11. The first valve of the three-way water inlet valve 14 is connected to the open end of the vertical pipe 131 of one water-changing component 13, the second valve of the three-way water inlet valve 14 is connected to the cold water source, and the third valve of the three-way water inlet valve 14 is openly arranged. The water inlet end of the water pump 15 is connected to the open end of the vertical pipe 131 of another water-changing component 13.

[0032] Reference Figure 2 , Figure 3 and Figure 4 The fixed mold 2 and the movable mold 3 are both arranged between the two water changing components 13. The fixed mold 2 is arranged between the movable mold 3 and the base 11 and is connected to the base 11. The fixed mold 2 is provided with a first molding cavity 20 at one end facing the movable mold 3, and the movable mold 3 is provided with a second molding cavity 30 at one end facing the fixed mold 2. Figure 3 and Figure 4 The side walls of the fixed mold 2 and the movable mold 3 are provided with a plurality of guide grooves 201 corresponding to the plurality of vertical pipes 131. The guide grooves 201 are provided along the length direction of the vertical pipes 131, and the vertical pipes 131 are provided in the corresponding guide grooves 201. A cold water cavity 202 is provided in the fixed mold 2 and the movable mold 3. A water exchange pipe 40 is provided on the fixed mold 2 and the movable mold 3. The first end of the water exchange pipe 40 is communicated with the bottom of the guide groove 201, and the second end is communicated with the cold water cavity 202. The first end of the water exchange pipe 40 is located above the second end of the water exchange pipe 40.

[0033] Reference Figure 3 and Figure 4 The vertical pipe 131 is provided with a water change valve mechanism 4 corresponding to the water change pipe 40, and the water change valve mechanism 4 is arranged in the guide groove 201. The water change valve mechanism 4 is telescopically installed on the vertical pipe 131, and the water outlet end of the water change valve mechanism 4 is used to be plugged and connected with the first end of the water change pipe 40.

[0034] Reference Figure 1 , Figure 3 and Figure 4In the embodiment of the present application, the movable mold 3 slides on the multiple vertical tubes 131 and then approaches the fixed mold 2. After the molds are closed, hot melt plastic is injected into the first molding cavity 20 and the second molding cavity 30. When the mold needs to be cooled, the vertical pipe 131 of one water changing assembly 13 is used for water intake into the cold water chamber 202, and the vertical pipe 131 of the other water changing assembly 13 is used for water discharge from the cold water chamber 202. When the mold is just closed, the water changing valve mechanism 4 is just arranged opposite to the first end of the water changing pipe 40, and then the water changing valve mechanism 4 is extended so that the water outlet end of the water changing valve mechanism 4 is plugged and connected with the first end of the water changing pipe 40, and the water changing valve mechanism 4 is opened to connect the vertical pipe 131 with the cold water chamber 202, so that the cold water chamber 202 can respectively enter and exit cold water through the two water changing assemblies 13, and the first valve and the second valve of the three-way water inlet valve 14 are opened, the third valve is closed, the second valve of the three-way water inlet valve 14 is connected to the cold water source, and the water pump 15 is started to allow cold water to pass through the cold water chamber 202. After the mold is cooled and before the mold is opened, the first valve and the third valve of the three-way water inlet valve 14 are opened, the second valve is closed, and the water pump 15 is started to pump out the water in the cold water chamber 202 to avoid vibration of the fixed mold 2 and the movable mold 3 during the mold opening process, which causes the water in the cold water chamber 202 to spill out, and the water exchange valve mechanism 4 contracts. After the connection between the water exchange valve mechanism 4 and the water exchange pipe 40 is released, the mold is opened. In the present application, the vertical pipe 131 is used as the guide shaft of the movable mold 3 and the inlet and outlet pipes of the cold water chamber 202, so that one pipe can be used for multiple purposes. Moreover, compared with multiple cooling pipes, the cold water chamber 202 has a simple structure, thereby simplifying the mold structure. At the same time, the vertical pipe 131 is connected by plugging with the water exchange valve mechanism 4 and the water exchange pipe 40, so that the connection and separation between the vertical pipe 131 and the cold water chamber 202 are convenient and quick, and then the cold water chamber 202, the vertical pipe 131, the water exchange pipe 40 and the water exchange valve mechanism 4 cooperate with each other, thereby optimizing the overall structure of the cooling system and facilitating the maintenance of the cooling system.

[0035] Reference Figure 3 , Figure 4 and Figure 5The water exchange valve mechanism 4 includes a guide tube 41, a movable insert tube 42 and a sealing plug 43. The side wall of the vertical tube 131 is provided with a guide hole 13101. The guide tube 41 is arranged in the guide tube 41, coaxial with the guide hole 13101, and connected to the guide tube 41 at the guide hole 13101. The movable insert tube 42 includes a trumpet tube 421 and a straight tube 422. The straight tube 422 is coaxially arranged in the guide tube 41 and is slidably connected with the guide tube 41 in the length direction of the guide tube 41. The trumpet tube 421 is arranged between the straight tube 422 and the corresponding water exchange pipe 40. The end of the trumpet tube 421 with a larger diameter is connected to the straight tube 422, and the end with a smaller diameter is used to be plugged with the first end of the corresponding water exchange pipe 40. The diameter of the sealing plug 43 is smaller than the inner diameter of the straight tube 422. In the length direction of the guide tube 41, the sealing plug 43 is movably arranged in the movable insert tube 42 to seal the end with a smaller diameter of the trumpet tube 421.

[0036] Reference Figure 3 , Figure 4 and Figure 5 In the embodiment of the present application, after the mold is closed, when the water exchange valve mechanism 4 needs to be plugged and connected with the first end of the water exchange pipe 40, the guide pipe 41 moves toward the first end of the water exchange pipe 40, so that the end with a smaller diameter of the trumpet pipe 421 is inserted into the water exchange pipe 40, and the plug connection between the movable plug 42 and the first end of the water exchange pipe 40 is realized. Then the sealing plug 43 is moved to keep the sealing plug 43 away from the trumpet pipe 421, so that the water exchange valve mechanism 4 is opened and connected with the water exchange pipe 40.

[0037] Reference Figure 3 , Figure 4 and Figure 5 The water exchange valve mechanism 4 further includes a spring rod 44 and a push rod 45. The push rod 45 is arranged in the first end of the water exchange pipe 40, and one end of the push rod 45 is connected to the water exchange pipe 40, and the other end is used to resist the sealing plug 43. The spring rod 44 is arranged in the straight pipe 422 and at the end of the sealing plug 43 away from the water exchange pipe 40, and one end of the push rod 45 is connected to the sealing plug 43, and the other end is connected to the straight pipe 422.

[0038] Reference Figure 3 , Figure 4 and Figure 5 In the embodiment of the present application, after the movable plug 42 is plugged into the first end of the water exchange pipe 40, the push rod 45 pushes the sealing plug 43 into the straight pipe 422 to open the water exchange valve mechanism 4. After the movable plug 42 is separated from the water exchange pipe 40, under the action of the spring rod 44, the sealing plug 43 can be reset to block the trumpet pipe 421, thereby making the opening and closing of the water exchange valve mechanism 4 convenient and quick.

[0039] Reference Figure 4 and Figure 5A first mesh plate 451 is connected between the top rod 45 and the water changing pipe 40. In the embodiment of the present application, the first mesh plate 451 can connect the top rod 45 and the water changing pipe 40 without hindering the water flow between the top rod 45 and the water changing pipe 40.

[0040] Reference Figure 4 and Figure 5 A second mesh plate 465 is connected between the spring rod 44 and the straight tube 422. In the embodiment of the present application, the second mesh plate 465 can connect the spring rod 44 and the straight tube 422 without hindering the water flow between the spring rod 44 and the straight tube 422.

[0041] Reference Figure 4 and Figure 5 The water exchange valve mechanism 4 further includes a telescopic assembly 46, which includes a side tube 460, a piston 463 and a connecting shaft 464. The side tube 460 is installed on the outer wall of the vertical tube 131, is coaxial with the straight tube 422, and is also connected to the vertical tube 131. The piston 463 is installed on the inner side of the side tube 460 and is dynamically sealed with the side tube 460. One end of the connecting shaft 464 is connected to the piston 463, and the other end is connected to the second mesh plate 465. In the embodiment of the present application, the piston 463 is driven to move in the side tube 460, thereby driving the movable insert 42 to approach or move away from the water exchange pipe 40.

[0042] Reference Figure 4 and Figure 5 The water exchange valve mechanism 4 further includes a limiting mesh plate 461 and a limiting ring 462. The limiting mesh plate 461 is arranged on the side of the piston 463 away from the vertical pipe 131 and is connected to the side pipe 460. The limiting ring 462 is sleeved on the connecting shaft 464 and is located on the side of the piston 463 away from the limiting mesh plate 461 and is connected to the side pipe 460. In the embodiment of the present application, the limiting mesh plate 461 and the limiting ring 462 are used to limit the position of the piston 463 so that the piston 463 will not be separated from the side pipe 460.

[0043] Reference Figure 4 and Figure 5 The water changing valve mechanism 4 further includes a magnetic member 466 and an electromagnet 467. The magnetic member 466 is disposed in the side tube 460 and connected to the end of the piston 463 away from the connecting shaft 464. The electromagnet 467 is mounted on the end of the limiting mesh plate 461 away from the piston 463. In the embodiment of the present application, the electromagnet 467 absorbs or repels the magnetic member 466, so that the piston 463 slides in the side tube 460.

[0044] Reference Figure 4 and Figure 5, the water change valve mechanism 4 also includes a spring 468 and a limit rod 469, the limit rod 469 is coaxially arranged in the side tube 460, and is located between the piston 463 and the limit mesh plate 461, and is connected to the limit mesh plate 461. The spring 468 is sleeved on the limit rod 469, one end of which is connected to the limit mesh plate 461, and the other end is connected to the piston 463. In the embodiment of the present application, when the movable plug 42 moves toward the water change pipe 40, the spring 468 is gradually stretched until the movable plug 42 is plugged and connected with the water change pipe 40. When it is necessary to release the connection between the movable plug 42 and the water change pipe 40, the electromagnet 467 is turned off, and under the reset action of the spring 468, the trumpet tube 421 end of the movable plug 42 can be completely immersed in the guide pipe 41, the connection between the movable plug 42 and the water change pipe 40 is released, and the movable plug 42 will not interfere with the movement of the fixed mold 2 and the fixed mold 2.

[0045] The implementation principle of an injection mold with an easy-to-maintain cooling system in the embodiment of the present application is as follows: When the mold is closed, the water-changing valve mechanism 4 is arranged opposite to the first end of the water-changing pipe 40. The electromagnet 467 repels the magnetic part 466, causing the piston 463 to slide in the side pipe 460, and by driving the piston 463 to move in the side pipe 460, the movable plug 42 is driven to approach the water-changing pipe 40, thereby realizing the plug-in connection between the movable plug 42 and the water-changing pipe 40. After the plug-in connection between the movable plug 42 and the first end of the water-changing pipe 40, the push rod 45 will push the sealing plug 43 into the straight pipe 422, realizing the opening of the water-changing valve mechanism 4, so that the vertical pipe 131 is connected to the cold water chamber 202. Then, the cold water chamber 202 can be respectively inlet and outlet of cold water through the two water-changing components 13, and the first valve and the second valve of the three-way water inlet valve 14 are opened, the third valve is closed, the second valve of the three-way water inlet valve 14 is connected to the cold water source, and the water pump 15 is started, so that cold water passes through the cold water chamber 202 to cool the mold.

[0046] After the mold is cooled and before the mold is opened, the first valve and the third valve of the three-way water inlet valve 14 are opened, the second valve is closed, and the water pump 15 is started to pump out the water in the cold water chamber 202 to avoid the fixed mold 2 and the movable mold 3 vibrating during the mold opening process, causing the water in the cold water chamber 202 to spill out. Then, the electromagnet 467 absorbs the magnetic part 466, so that the piston 463 slides in the side tube 460, and drives the piston 463 to move in the side tube 460, thereby driving the movable plug 42 away from the water exchange pipe 40, thereby realizing the separation between the movable plug 42 and the water exchange pipe 40, and closing the electromagnet 467. Under the reset action of the spring 468, the trumpet tube 421 end of the movable plug 42 can be completely immersed in the guide pipe 41, the connection between the movable plug 42 and the water exchange pipe 40 is released, and the movable plug 42 does not interfere with the movement of the fixed mold 2 and the fixed mold 2, and then the mold is opened.

[0047] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0048] The above are all optional embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An injection mold with an easy-to-maintain cooling system, characterized in that: It comprises a die base mechanism (1), a fixed die (2), a movable die (3) and a water changing valve mechanism (4), wherein the die base mechanism (1) comprises a base (11) and two water changing components (13), and the two water changing components (13) are arranged opposite to each other; The water changing assembly (13) comprises a plurality of vertical pipes (131), one end of the vertical pipe (131) having an opening and the other end being closed, and the open end being connected to the base (11), and the plurality of vertical pipes (131) are vertically spaced and distributed on the base (11); The fixed mold (2) and the movable mold (3) are both arranged between the two water changing components (13); the fixed mold (2) is arranged between the movable mold (3) and the base (11), and is connected to the base (11); A first molding cavity (20) is provided at one end of the fixed mold (2) facing the movable mold (3), and a second molding cavity (30) is provided at one end of the movable mold (3) facing the fixed mold (2); The side walls of the fixed mold (2) and the movable mold (3) are each provided with a plurality of guide grooves (201) arranged corresponding to the plurality of vertical tubes (131), the guide grooves (201) being arranged along the length direction of the vertical tubes (131), and the vertical tubes (131) being arranged in the corresponding guide grooves (201); A cold water cavity (202) is provided in both the fixed mold (2) and the movable mold (3); a water exchange pipe (40) is provided on both the fixed mold (2) and the movable mold (3); a first end of the water exchange pipe (40) is connected to the bottom of the guide groove (201), and a second end of the water exchange pipe (40) is connected to the cold water cavity (202); The vertical pipe (131) is provided with a water exchange valve mechanism (4) arranged corresponding to the water exchange pipe (40), and the water exchange valve mechanism (4) is arranged in the guide groove (201); The water exchange valve mechanism (4) is telescopically mounted on the vertical pipe (131), and the water outlet end of the water exchange valve mechanism (4) is used for plugging and connecting with the first end of the water exchange pipe (40).

2. The injection mold with an easy-to-maintain cooling system according to claim 1, characterized in that: The water exchange valve mechanism (4) comprises a guide tube (41), a movable insert tube (42) and a sealing plug (43); a guide hole (13101) is provided on the side wall of the vertical tube (131); The guide tube (41) is arranged inside the guide tube (41), is coaxial with the guide hole (13101), and is connected to the guide tube (41) at the guide hole (13101); The movable cannula (42) comprises a trumpet tube (421) and a straight tube (422); the straight tube (422) is coaxially arranged in the guide tube (41) and is slidably connected to the guide tube (41) in the length direction of the guide tube (41); The bell pipe (421) is arranged between the straight pipe (422) and the corresponding water exchange pipe (40); the end of the bell pipe (421) with a larger diameter is connected to the straight pipe (422), and the end with a smaller diameter is used for plugging with the first end of the corresponding water exchange pipe (40); The diameter of the sealing plug (43) is smaller than the inner diameter of the straight tube (422). In the length direction of the guide tube (41), the sealing plug (43) is movably arranged in the movable insert tube (42) for sealing the end of the trumpet tube (421) with a smaller diameter.

3. The injection mold with an easy-to-maintain cooling system according to claim 2, characterized in that: The water exchange valve mechanism (4) further comprises a spring rod (44) and a push rod (45); the push rod (45) is arranged in the first end of the water exchange pipe (40), one end of the push rod is connected to the water exchange pipe (40), and the other end is used to abut against the sealing plug (43); The spring rod (44) is disposed in the straight tube (422) and at an end of the sealing plug (43) away from the water exchange tube (40), and one end is connected to the sealing plug (43) and the other end is connected to the straight tube (422).

4. The injection mold with an easy-to-maintain cooling system according to claim 3, characterized in that: A first mesh plate (451) is connected between the top rod (45) and the water exchange pipe (40).

5. The injection mold with an easy-to-maintain cooling system according to claim 3, characterized in that: A second mesh plate (465) is connected between the spring rod (44) and the straight tube (422).

6. The injection mold with an easy-to-maintain cooling system according to claim 5, characterized in that: The water exchange valve mechanism (4) further comprises a telescopic assembly (46), the telescopic assembly (46) comprising a side tube (460), a piston (463) and a connecting shaft (464), the side tube (460) being mounted on the outer side wall of the vertical tube (131), being coaxial with the straight tube (422), and being in communication with the vertical tube (131); The piston (463) is installed inside the side tube (460) and is dynamically sealed to the side tube (460); one end of the connecting shaft (464) is connected to the piston (463), and the other end is connected to the second mesh plate (465).

7. The injection mold with an easy-to-maintain cooling system according to claim 6, characterized in that: The water exchange valve mechanism (4) further comprises a limiting mesh plate (461) and a limiting ring (462); the limiting mesh plate (461) is arranged on a side of the piston (463) away from the vertical pipe (131) and is connected to the side pipe (460); The limiting ring (462) is sleeved on the connecting shaft (464), is located on a side of the piston (463) away from the limiting mesh plate (461), and is connected to the side tube (460).

8. The injection mold with an easy-to-maintain cooling system according to claim 7, characterized in that: The water exchange valve mechanism (4) further comprises a magnetic component (466) and an electromagnet (467); the magnetic component (466) is arranged in the side tube (460) and is connected to an end of the piston (463) away from the connecting shaft (464); The electromagnet (467) is mounted on an end of the limiting mesh plate (461) away from the piston (463).

9. The injection mold with an easy-to-maintain cooling system according to claim 8, characterized in that: The water exchange valve mechanism (4) further comprises a spring (468) and a limiting rod (469); the limiting rod (469) is coaxially arranged in the side tube (460), is located between the piston (463) and the limiting mesh plate (461), and is connected to the limiting mesh plate (461); The spring (468) is sleeved on the limiting rod (469), one end of the spring is connected to the limiting mesh plate (461), and the other end is connected to the piston (463).

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