Continuous injection mold and continuous working method thereof

Abstract

The invention provides a continuous injection mold and a continuous working method thereof, and relates to an injection mold, the continuous injection mold comprises a turntable cover plate provided with a plurality of groups of injection mold units, the turntable cover plate covers a liquid changing cavity, and the liquid changing cavity comprises a cooling liquid cavity located in the center and a circulating liquid cavity located on the periphery of the cooling liquid cavity; cooling liquid inlets of the injection mold units are connected with the cooling liquid pipe openings through corresponding liquid inlet pipes, cooling liquid outlets of the injection mold units are connected with the corresponding circulating liquid pipe openings through corresponding liquid outlet pipes, and the cooling liquid inlets and the cooling liquid outlets of every two adjacent injection mold units are connected in an end-to-end mode through transition pipes. By designing the combination of the rotating disc cover plate, the cooling liquid cavity and the circulating liquid cavity and through reasonable layout and connection of communicating pipelines, the injection molding cooling effect can be achieved, and the preheating function can be added, so that on the basis of adapting to continuous production, the risk of initial solidification of solution injection is further avoided.

Description

Technical Field

[0001] The invention relates to an injection mould, in particular to a continuous injection mould and a continuous working method thereof. Background Art

[0002] An injection mold is a tool used for mass production of plastic products with complex shapes. It consists of a movable mold and a fixed mold. The molten plastic is injected under high pressure by an injection molding machine, and a molded product is obtained after cooling and solidification. The traditional plastic injection molding method is mainly to melt the granular raw material and then inject it into the mold cavity, and then cool the mold core. After the mold core is cooled, the mold is opened and demolded to remove the mold core. However, in actual operation, after each injection molding, in order to prevent leakage, the nozzle of the injection molding tube is always against the injection port and waits for the mold core to cool and demold before injecting the raw material into the mold cavity again. This method not only has low injection efficiency, but also the residual raw material at the nozzle of the nozzle will gradually cool down while waiting for the mold core to cool, which is easy to block the nozzle. Especially for some molds with complex structures, the cooling time required is longer, which is not only more likely to block the nozzle, but the infusion mechanism must also keep the raw material in a molten state at all times while waiting for cooling, thereby wasting a lot of energy.

[0003] In order to solve the above technical problems, a turntable distribution structure as shown in a patent for a continuously working injection molding device (Announcement No. CN205467013U) is produced, so as to save the waiting time for cooling and achieve the purpose of continuous production. However, new problems will arise in this type of production. For example, when the injection molding nozzle is transitioning, since the general injection molding nozzles are vertically distributed, after each injection molding is completed, dripping often occurs when the turntable is rotated, resulting in a poor injection molding environment.

[0004] Moreover, at the beginning stage of injection molding, the injection mold is still in a low temperature state, which may cause the flow resistance of the plastic melt to increase, the flow rate to slow down, and even solidify during mold filling when the plastic melt is not fully injected during the next injection molding process, thereby hindering subsequent feeding and causing defects such as material shortage, dents, and weld seams in the plastic parts. Summary of the invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a continuous injection mold and a continuous working method thereof. By designing the turntable group as a combination of a turntable cover plate, a cooling liquid chamber and a circulating liquid chamber, and through the reasonable layout and connection of the connecting pipelines, not only the injection cooling effect can be achieved, but also the preheating function can be added. On the basis of adapting to continuous production, the risk of initial solidification of the melt injection can be further avoided, and better heat recovery can be achieved.

[0006] The present invention provides the following technical solutions:

[0007] A continuous injection mold and a continuous working method thereof, comprising a turntable cover plate on which multiple groups of injection mold units are arranged, the turntable cover plate is covered on a liquid exchange chamber and driven to rotate by a driving mechanism, multiple groups of circulating liquid pipe openings corresponding to the injection mold units are distributed on the turntable cover plate, and a group of cooling liquid pipe openings are also arranged in the center, the liquid exchange chamber comprises a cooling liquid chamber located in the center and a circulating liquid chamber located outside the cooling liquid chamber, the cooling liquid pipe openings are aligned on the cooling liquid chamber, and the circulating liquid pipe openings are aligned on the circulating liquid chamber, the cooling liquid inlet of the injection mold unit is connected to the cooling liquid pipe opening through a corresponding liquid inlet pipe, and the cooling liquid outlet is connected to the corresponding circulating liquid pipe opening through a corresponding liquid outlet pipe, and two adjacent groups of injection molds are connected to each other. The coolant inlet and the coolant outlet are connected between the mold units through a transition pipe, so that the coolant during injection molding in the injection mold unit flows through the transition pipe to the next group of injection mold units to be injected for preheating after heat exchange. The liquid inlet pipe, the liquid outlet pipe and the transition pipe are also provided with a solenoid valve for controlling the opening and closing of the pipeline, and the coolant after heat exchange flows into the circulating liquid cavity through the liquid outlet pipe at the coolant outlet of the last group of injection mold units to be injected. The circulating liquid cavity is provided with a drain port, and the circulating liquid in it flows into the cooling cavity again after being condensed by the condenser, and a water pump is installed in the cooling cavity, and the coolant pipe port is connected to the water pump by installing a rotary joint, and the water pump is used to pump the coolant in the cooling cavity into the injection mold unit;

[0008] At this point, the coolant after heat exchange can be better reused. When a group of injection mold units rotates to one side of the injection molding machine for injection molding, the injection mold unit is a working mold unit, and its liquid inlet pipe and liquid outlet pipe are respectively a liquid inlet working pipe and a liquid outlet working pipe. The transition pipe connected to the coolant outlet is a transition working pipe, and the transition pipe connected to the coolant inlet is a transition cut-off pipe. At this time, the liquid inlet working pipe is opened, the liquid outlet working pipe is closed, and the transition working pipe is opened, and the transition cut-off pipe is closed. The transition pipes of the remaining injection mold units to be injected are opened, and the coolant of the working mold unit flows through the remaining injection mold units through each transition pipe in turn, and the coolant outlet of the last group of injection mold units to be injected flows into the circulating liquid cavity through the liquid outlet pipe, and when the turntable cover plate rotates to make the next group of injection mold units to be injected When the mold unit rotates to one side of the injection molding machine, the corresponding transition working pipe on the working mold unit on the side of the injection molding machine is closed, and the liquid outlet working pipe is opened; at this time, the working mold unit on the side of the injection molding machine that is rotated out enters an independent heat exchange injection waiting process, and the injection mold unit that is rotated into the side of the injection molding machine again becomes a new preheating heat provider again, and the preheating under this situation decreases step by step during the exchange, which can ensure that the injection mold unit to be injected can always get the maximum heat exchange to ensure the initial temperature before injection molding, until the last group of injection mold units to be injected completes the injection molding injection, and at the beginning of a new round of injection molding, the transition cut-off pipe of the injection mold unit that has completed the demolding is opened again to undertake the coolant preheating of the injection mold unit during injection molding.

[0009] Preferably, the injection mold units are provided with four groups and are evenly distributed on the turntable cover plate. The four groups of injection mold units are respectively a first group of injection mold units, a second group of injection mold units, a third group of injection mold units and a fourth group of injection mold units, which are distributed in sequence. The liquid inlet pipes of the first group of injection mold units, the second group of injection mold units, the third group of injection mold units and the fourth group of injection mold units are respectively liquid inlet pipe one, liquid inlet pipe two, liquid inlet pipe three and liquid inlet pipe four; their liquid outlet pipes are respectively liquid outlet pipe one, liquid outlet pipe two, liquid outlet pipe three and liquid outlet pipe four; their transition pipes connected to the coolant outlet are respectively outlet transition pipe one, outlet transition pipe two, outlet transition pipe three and outlet transition pipe four, and the outlet transition pipe one, outlet transition pipe two, outlet transition pipe three and outlet transition pipe four are respectively connected to the coolant inlet of the second group of injection mold units, the third group of injection mold units, the fourth group of injection mold units and the first group of injection mold units.

[0010] A continuous working method of a continuous injection mold, based on the above-mentioned continuous injection mold, comprises the following steps:

[0011] S1: When the first group of injection mold units rotates to one side of the injection molding machine for injection molding, the liquid inlet pipe 1 and the liquid outlet pipe 4 are opened, and the liquid outlet pipe 1, the liquid outlet pipe 2, and the liquid outlet pipe 3 are closed, and the outlet transition pipe 1, the outlet transition pipe 2, and the outlet transition pipe 3 are opened, while the outlet transition pipe 4 is closed, and the coolant of the first group of injection mold units flows through the outlet transition pipe 1, the outlet transition pipe 2, and the outlet transition pipe 3 through the remaining injection mold units, and flows into the circulating liquid cavity through the liquid outlet pipe 4;

[0012] S2: Then, when the second group of injection mold units rotates to one side of the injection molding machine for injection molding, the liquid inlet pipe 1, liquid inlet pipe 2, liquid outlet pipe 1, and liquid outlet pipe 4 are continued to be opened, and the outlet transition pipe 1, liquid outlet pipe 2, and liquid outlet pipe 3 are closed, and the outlet transition pipe 2 and outlet transition pipe 3 are opened, and the outlet transition pipe 4 is also closed, and the coolant of the second group of injection mold units flows through the outlet transition pipe 2 and outlet transition pipe 3 through the third group of injection mold units and the fourth group of injection mold units, and flows into the circulating liquid cavity through the liquid outlet pipe 4, and the coolant of the first group of injection mold units also flows into the circulating liquid cavity directly after heat exchange;

[0013] S3: Then, when the third group of injection mold units rotates to one side of the injection molding machine for injection molding, the liquid inlet pipe 1, liquid inlet pipe 2, liquid inlet pipe 3, liquid outlet pipe 1, liquid outlet pipe 2, and liquid outlet pipe 4 are continued to be opened, and the outlet transition pipe 1, outlet transition pipe 2, and liquid outlet pipe 3 are closed, and the outlet transition pipe 3 is opened, and the outlet transition pipe 4 is also closed, and the coolant of the third group of injection mold units flows through the outlet transition pipe 3 through the fourth group of injection mold units, and flows into the circulating liquid cavity through the liquid outlet pipe 4, and the coolant of the first group of injection mold units and the second group of injection mold units also flows into the circulating liquid cavity directly after heat exchange;

[0014] S4: Then, when the fourth group of injection mold units rotates to one side of the injection molding machine for injection molding, the liquid inlet pipe 1, liquid inlet pipe 2, liquid inlet pipe 3, liquid inlet pipe 4, liquid outlet pipe 1, liquid outlet pipe 2, liquid outlet pipe 3, and liquid outlet pipe 4 continue to be opened, and the outlet transition pipe 1, outlet transition pipe 2, outlet transition pipe 3, outlet transition pipe 4, and liquid outlet pipe 3 are closed. The coolant of the fourth group of injection mold units flows into the circulating liquid cavity through the liquid outlet pipe 4, and the coolant of the first group of injection mold units and the second group of injection mold units also flows into the circulating liquid cavity directly after heat exchange.

[0015] Preferably, then, in a new round of injection molding, after the first group of injection mold units completes demolding, the outlet transition pipe four and the liquid outlet pipe one are opened accordingly, and the liquid outlet pipe four is closed, and the first group of injection mold units are preheated by the residual heat of the coolant of the fourth group of injection mold units, and after the second group of injection mold units completes demolding and before the first group of injection mold units performs injection molding, the outlet transition pipe one, the outlet transition pipe four, and the liquid outlet pipe two are opened, and the liquid outlet pipe one and the liquid outlet pipe four are closed, and the first group of injection mold units, the injection mold units, are preheated by the residual heat of the coolant of the fourth group of injection mold units. The second group of injection mold units, and after the third group of injection mold units completes demolding, and before the first group of injection mold units and the second group of injection mold units perform injection molding, continue to open outlet transition pipe four, outlet transition pipe one, outlet transition pipe two, and liquid outlet pipe two, and close liquid outlet pipe one, liquid outlet pipe two, and liquid outlet pipe four, use the residual heat of the coolant of the fourth group of injection mold units to preheat the first group of injection mold units, the second group of injection mold units, and the third group of injection mold units, and after the fourth group of injection mold units completes demolding, repeat the operating steps S1-S4.

[0016] Preferably, the injection mold unit includes a mold injection tube, the injection molding machine includes an injection nozzle for docking with the mold injection tube to allow molten raw materials to be injected into the mold cavity, the mold injection tube includes a rectangular vertical tube 1 and an inclined tube 1 connected to the bottom end of the rectangular vertical tube 1 and inclined downward, the inclined tube 1 is used to be connected to the mold cavity, the injection nozzle includes a rectangular vertical tube 2 and an inclined tube 2 connected to the middle of the rectangular vertical tube 2 and inclined downward, the inclined tube 2 is connected to the injection molding machine through a hose, the rectangular vertical tube 2 is driven to rise and fall by a cylinder, and when it docks with the rectangular vertical tube 1, it allows molten raw materials to be injected into the mold cavity, and because the inclined tubes 1 and 2 are arranged to be inclined downward, it is not easy for the raw materials to accumulate at the port and cause blockage.

[0017] Preferably, a group of blocking blocks 1 are arranged at the bottom of the rectangular vertical tube 1, and the blocking block 1 is lifted and lowered along the rectangular vertical tube 1 under the drive of the lifting device, and an inclined surface 1 is arranged on the side facing the port of the inclined tube 1, and the inclined surface 1 forms a buffer ramp for the raw material to enter the inclined tube 1 from the rectangular vertical tube 1, and a group of blocking blocks 2 are arranged at the top of the rectangular vertical tube 2, and the blocking block 2 is connected to the top of the rectangular vertical tube 2 through a spring, and an inclined surface 2 is arranged on the side facing the port of the inclined tube 2, and the inclined surface 2 forms a buffer ramp for the raw material to enter the inclined tube 2 from the rectangular vertical tube 2, and after the injection molding is completed, the blocking block 1 is driven by the lifting device to pass through the rectangular vertical tube 1 and enter the rectangular vertical tube 2 blocking block 2 until the bottom end of its buffer ramp docks with the inclined tube 2, and the cleaned raw material can be collected again and enter the injection molding machine through the inclined tube 2 to avoid blockage of the pipe mouth caused by residue.

[0018] Preferably, the lifting device includes a nut block installed at the bottom of a rectangular vertical tube, a group of screw rods are threadedly installed on the nut block, the ends of the screw rods are connected to a blocking block, an external gear ring is also provided outside the nut block, and a group of lifting motors are also installed at the bottom of the rectangular vertical tube, and the driving end of the lifting motor is meshed with the external gear ring through a lifting gear.

[0019] Preferably, the driving mechanism includes a mounting frame fixed outside the fluid exchange chamber, a group of driving shafts driven by a driving motor are mounted on the mounting frame, a driving gear is mounted outside the driving shaft, and an external gear ring 2 meshing with the driving gear is provided outside the turntable cover.

[0020] The beneficial effects of the present invention are:

[0021] In the present invention, by designing a new cooperation between the injection molding nozzle of the injection molding machine and the injection molding tube of the mold, it is ensured that after each injection molding, the effect of automatic cleaning can be achieved to prevent the occurrence of dripping when the turntable group is indexed, and by designing the turntable group as a combination of a turntable cover plate, a cooling liquid chamber and a circulating liquid chamber, and by reasonable layout and connection of the connecting pipelines, it is possible to achieve not only the effect of injection molding cooling, but also to increase the function of preheating, so as to further avoid the risk of initial solidification of the melt injection on the basis of adapting to continuous production, and also to achieve better heat recovery and utilization;

[0022] Specifically, when a group of injection mold units rotates to one side of the injection molding machine for injection molding, the injection mold unit is a working mold unit, and its liquid inlet pipe and liquid outlet pipe are respectively a liquid inlet working pipe and a liquid outlet working pipe, and its transition pipe connected to the coolant outlet is a transition working pipe, and the transition pipe connected to the coolant inlet is a transition cut-off pipe. At this time, the liquid inlet working pipe is opened, the liquid outlet working pipe is closed, and the transition working pipe is opened and the transition cut-off pipe is closed. The transition pipes of the remaining injection mold units to be injected are opened, and the coolant of the working mold unit flows through the remaining injection mold units through each transition pipe in turn, and the coolant outlet of the last group of injection mold units to be injected flows into the circulating liquid cavity through the liquid outlet pipe, and when the turntable cover plate rotates to make the next group of injection mold units to be injected rotate to the injection molding machine, ... When the injection molding machine is on one side, the corresponding transition working pipe on the working mold unit on the side of the injection molding machine is closed, and the liquid outlet working pipe is opened; at this time, the working mold unit on the side of the injection molding machine that is screwed out enters an independent heat exchange injection waiting process, and the injection mold unit that is screwed into the side of the injection molding machine again becomes a new preheating heat provider again, and the preheating under this situation decreases step by step during the exchange, which can ensure that the injection mold unit to be injected can always get the maximum heat exchange to ensure the initial temperature before injection molding, until the last group of injection mold units to be injected completes the injection molding injection, and at the beginning of a new round of injection molding, the transition cut-off pipe of the injection mold unit that has completed the demolding is opened again to undertake the coolant preheating of the injection mold unit in the injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 It is a top view of the structure of the turntable cover plate of the present invention;

[0025] Figure 2 It is a top view of the structure of the liquid exchange chamber in the present invention;

[0026] Figure 3 It is a cross-sectional view of the structure of the turntable cover plate and the liquid exchange chamber in the present invention;

[0027] Figure 4 It is a schematic diagram of the structure before the mold injection tube and the injection nozzle are connected;

[0028] Figure 5 It is a structural diagram of the mold injection tube and the injection nozzle when they are connected to the injection molding material;

[0029] Figure 6 It is a structural diagram of the mold injection tube and the injection nozzle when they are connected to clean the residual liquid;

[0030] Markings in the figure:

[0031] 1. Turntable cover; 2. Driving mechanism; 3. Circulating liquid pipe port; 4. Cooling liquid pipe port; 5. Cooling liquid cavity; 6. Circulating liquid cavity; 8. Water pump; 9. First group of injection mold units; 10. Second group of injection mold units; 11. Third group of injection mold units; 12. Fourth group of injection mold units; 13. Liquid inlet pipe 1; 14. Liquid inlet pipe 2; 15. Liquid inlet pipe 3; 16. Liquid inlet pipe 4; 17. Liquid outlet pipe 1; 18. Liquid outlet pipe 2; 19. Liquid outlet pipe 3; 20. Liquid outlet pipe 4; 21. Outlet transition pipe 1; 22. Outlet transition pipe 2; 23. Outlet transition pipe 3; 24. Outlet transition pipe 4; 25. Mold injection tube; 26. Injection nozzle; 251. Rectangular vertical pipe 1; 252. Oblique pipe 1; 253. Sealing block 1; 254. Lifting device; 255. Inclined surface 1; 261. Rectangular vertical pipe 2; 262. Oblique pipe 2; 263. Cylinder; 264. Sealing block 2; 265. Inclined surface 2. DETAILED DESCRIPTION

[0032] Example 1

[0033] like Figure 1-6 As shown, a continuous injection mold, in this embodiment, includes a turntable cover 1 on which multiple groups of injection mold units are arranged, the turntable cover 1 is covered on the liquid exchange chamber and driven to rotate by a driving mechanism 2, multiple groups of circulating liquid nozzles 3 corresponding to the injection mold units are distributed thereon, and a group of cooling liquid nozzles 4 are also arranged in the center, the liquid exchange chamber includes a cooling liquid chamber 5 located in the center and a circulating liquid chamber 6 located outside the cooling liquid chamber 5, the cooling liquid nozzle 4 is aligned with the cooling liquid chamber 5, and the circulating liquid nozzle 3 is aligned with the circulating liquid chamber 6, the cooling liquid inlet of the injection mold unit is connected to the cooling liquid nozzle 4 through the corresponding liquid inlet pipe, and its cooling liquid outlet is connected to the corresponding circulating liquid nozzle 3 through the corresponding liquid outlet pipe, and the adjacent A transition pipe is also used between the two groups of injection mold units to connect the coolant inlet and the coolant outlet, so that the coolant during injection molding in the injection mold unit can flow through the transition pipe to the next group of injection mold units to be injected for preheating after heat exchange. The liquid inlet pipe, the liquid outlet pipe and the transition pipe are also provided with solenoid valves for controlling the opening and closing of the pipelines, and the coolant after heat exchange flows into the circulating liquid cavity 6 through the liquid outlet pipe at the coolant outlet of the last group of injection mold units to be injected. A drain port is provided on the circulating liquid cavity 6, and the circulating liquid in the circulating liquid cavity 6 flows into the cooling cavity again after being condensed by the condenser. A water pump 8 is installed in the cooling cavity, and the coolant pipe port 4 is connected to the water pump 8 by installing a rotary joint. The water pump 8 is used to pump the coolant in the cooling cavity into the injection mold unit;

[0034] At this point, the coolant after heat exchange can be better reused. When a group of injection mold units rotates to one side of the injection molding machine for injection molding, the injection mold unit is a working mold unit, and its liquid inlet pipe and liquid outlet pipe are respectively a liquid inlet working pipe and a liquid outlet working pipe. The transition pipe connected to the coolant outlet is a transition working pipe, and the transition pipe connected to the coolant inlet is a transition cut-off pipe. At this time, the liquid inlet working pipe is opened, the liquid outlet working pipe is closed, and the transition working pipe is opened and the transition cut-off pipe is closed. The transition pipes of the remaining injection mold units to be injected are opened, and the coolant of the working mold unit flows through the remaining injection mold units through each transition pipe in turn, and the coolant outlet of the last group of injection mold units to be injected flows into the circulating liquid chamber 6 through the liquid outlet pipe, and when the turntable cover plate 1 rotates so that the next group of injection mold units to be injected When the mold unit rotates to one side of the injection molding machine, the corresponding transition working pipe on the working mold unit on the side of the injection molding machine is closed, and the liquid outlet working pipe is opened; at this time, the working mold unit on the side of the injection molding machine that is rotated out enters an independent heat exchange injection waiting process, and the injection mold unit that is rotated into the side of the injection molding machine again becomes a new preheating heat provider again, and the preheating under this situation decreases step by step during the exchange, which can ensure that the injection mold unit to be injected can always get the maximum heat exchange to ensure the initial temperature before injection molding, until the last group of injection mold units to be injected completes the injection molding injection, and at the beginning of a new round of injection molding, the transition cut-off pipe of the injection mold unit that has completed the demolding is opened again to undertake the coolant preheating of the injection mold unit during injection molding.

[0035] There are four groups of injection mold units, which are evenly distributed around the turntable cover 1. The four groups of injection mold units are the first group of injection mold units 9, the second group of injection mold units 10, the third group of injection mold units 11 and the fourth group of injection mold units 12, which are distributed in sequence. The liquid inlet pipes of the first group of injection mold units 9, the second group of injection mold units 10, the third group of injection mold units 11 and the fourth group of injection mold units 12 are respectively the liquid inlet pipe 13, the liquid inlet pipe 2 14, the liquid inlet pipe 3 15 and the liquid inlet pipe 4 16; the liquid outlet pipes are respectively They are respectively outlet pipe 17, outlet pipe 2 18, outlet pipe 3 19, and outlet pipe 4 20; the transition pipes connected to the coolant outlet are outlet transition pipe 1 21, outlet transition pipe 2 22, outlet transition pipe 3 23, and outlet transition pipe 4 24, respectively; outlet transition pipe 1 21, outlet transition pipe 2 22, outlet transition pipe 3 23, and outlet transition pipe 4 24 are connected to the coolant inlet of the second injection mold unit 10, the third injection mold unit 11, the fourth injection mold unit 12, and the first injection mold unit 9 in sequence.

[0036] The injection mold unit includes a mold injection tube 25, and the injection molding machine includes an injection nozzle 26 for docking with the mold injection tube 25 to allow the raw material to be molten and injected into the mold cavity. The mold injection tube 25 includes a rectangular vertical tube 251 and an inclined tube 252 connected to the bottom end of the rectangular vertical tube 251 and inclined downward. The inclined tube 252 is used to connect with the mold cavity. The injection nozzle 26 includes a rectangular vertical tube 261 and an inclined tube 262 connected to the middle of the rectangular vertical tube 261 and inclined downward. The inclined tube 262 is connected to the injection molding machine through a hose. The rectangular vertical tube 261 is driven to rise and fall by the cylinder 263, and when it docks with the rectangular vertical tube 251, it allows the raw material to be molten and injected into the mold cavity. Since the inclined tubes 1 252 and 262 are arranged to be inclined downward, it is not easy for the raw material to accumulate at the port and cause blockage.

[0037] A group of blocking blocks 253 are arranged at the bottom of the rectangular vertical tube 251. The blocking blocks 253 are lifted and lowered along the rectangular vertical tube 251 under the drive of the lifting device 254. A slope 255 is arranged on the side facing the port of the inclined tube 252. The slope 255 forms a buffer ramp for the raw materials to enter the inclined tube 252 from the rectangular vertical tube 251. A group of blocking blocks 264 are arranged at the top of the rectangular vertical tube 261. The blocking blocks 264 are connected to the top of the rectangular vertical tube 261 through a spring. An inclined surface 265 is provided on one side of the port of the second tube 262, and the inclined surface 265 forms a buffer ramp for the raw material to enter the second inclined tube 262 from the rectangular vertical tube 261. After the injection molding is completed, the blocking block 253 is driven by the lifting device 254 to pass through the rectangular vertical tube 251 and enter the rectangular vertical tube 261 blocking block 264 until the bottom end of its buffer ramp docks with the second inclined tube 262. The cleaned raw materials can be collected again and enter the injection molding machine through the second inclined tube 262 to avoid blockage of the pipe mouth caused by residue.

[0038] The lifting device 254 includes a nut block installed at the bottom of a rectangular vertical tube 251, a set of screw rods are threadedly installed on the nut block, the ends of the screw rods are connected to a blocking block 253, an outer gear ring is provided outside the nut block, and a set of lifting motors are installed at the bottom of the rectangular vertical tube, and the driving end of the lifting motor is meshed with the outer gear ring through the lifting gear.

[0039] The driving mechanism 2 includes a mounting frame fixed outside the liquid exchange chamber, on which a set of driving shafts driven by a driving motor are mounted, and a driving gear is mounted outside the driving shaft. The turntable cover plate 1 is provided with two external gear rings meshing with the driving gear.

[0040] Example 2

[0041] A continuous working method of a continuous injection mold, based on the above-mentioned continuous injection mold, comprises the following steps:

[0042] S1: When the first group of injection mold units 9 rotates to one side of the injection molding machine for injection molding, the liquid inlet pipe 13 and the liquid outlet pipe 4 20 are opened, and the liquid outlet pipe 17, the liquid outlet pipe 2 18, and the liquid outlet pipe 3 19 are closed, and the outlet transition pipe 1 21, the outlet transition pipe 2 22, and the outlet transition pipe 3 23 are opened, and the outlet transition pipe 4 24 is closed, and the coolant of the first group of injection mold units 9 flows through the outlet transition pipe 1 21, the outlet transition pipe 2 22, and the outlet transition pipe 3 23 through the remaining injection mold units, and flows into the circulating liquid cavity 6 through the liquid outlet pipe 4 20;

[0043] S2: Then, when the second group of injection mold units 10 rotates to one side of the injection molding machine for injection molding, the liquid inlet pipe 13, the liquid inlet pipe 2, the liquid outlet pipe 1, the liquid outlet pipe 4, the liquid outlet pipe 20 continue to be opened, and the outlet transition pipe 1, the liquid outlet pipe 2, the liquid outlet pipe 3, the liquid outlet pipe 19 are closed, and the outlet transition pipe 2, the outlet transition pipe 3, the outlet transition pipe 2, the outlet transition pipe 23 are opened, and the outlet transition pipe 4, the outlet transition pipe 4, is also closed. The coolant of the second group of injection mold units 10 flows through the outlet transition pipe 2, the outlet transition pipe 3, the outlet transition pipe 23, the third group of injection mold units 11 and the fourth group of injection mold units 12, and flows into the circulating liquid cavity 6 through the liquid outlet pipe 4, the coolant of the first group of injection mold units 9 also flows into the circulating liquid cavity 6 directly after heat exchange;

[0044] S3: Then, when the third group of injection mold units 11 rotates to one side of the injection molding machine for injection molding, the liquid inlet pipe 1 13, the liquid inlet pipe 2 14, the liquid inlet pipe 3 15, the liquid outlet pipe 1 17, the liquid outlet pipe 2 18, and the liquid outlet pipe 4 20 continue to be opened, and the outlet transition pipe 1 21, the outlet transition pipe 2 22, and the liquid outlet pipe 3 19 are closed, and the outlet transition pipe 3 23 is opened, and the outlet transition pipe 4 24 is also closed, and the coolant of the third group of injection mold units 11 flows through the outlet transition pipe 3 23 through the fourth group of injection mold units 12, and flows into the circulating liquid cavity 6 through the liquid outlet pipe 4 20, and the coolant of the first group of injection mold units 9 and the second group of injection mold units 10 also flows into the circulating liquid cavity 6 directly after heat exchange;

[0045] S4: Then, when the fourth group of injection mold units 12 rotates to one side of the injection molding machine for injection molding, the liquid inlet pipe 1 13, liquid inlet pipe 2 14, liquid inlet pipe 3 15, liquid inlet pipe 4 16, liquid outlet pipe 1 17, liquid outlet pipe 2 18, liquid outlet pipe 3 19, liquid outlet pipe 4 20 continue to be opened, and the outlet transition pipe 1 21, outlet transition pipe 2 22, outlet transition pipe 3 23, outlet transition pipe 4 24, and liquid outlet pipe 3 19 are closed. The coolant of the fourth group of injection mold units 12 flows into the circulating liquid cavity 6 through the liquid outlet pipe 4 20, and the coolant of the first group of injection mold units 9 and the second group of injection mold units 10 also flows into the circulating liquid cavity 6 directly after heat exchange.

[0046] Then, in a new round of injection molding, after the first group of injection mold units 9 completes demoulding, the outlet transition pipe 24 and the liquid outlet pipe 17 are opened, and the liquid outlet pipe 20 is closed, and the first group of injection mold units 9 are preheated by the residual heat of the coolant of the fourth group of injection mold units 12. After the second group of injection mold units 10 completes demoulding and before the first group of injection mold units 9 perform injection molding, the outlet transition pipe 21, the outlet transition pipe 24, and the liquid outlet pipe 18 are opened, and the liquid outlet pipe 17 and the liquid outlet pipe 20 are closed, and the first group of injection mold units 9 and the second group of injection mold units 10 are preheated by the residual heat of the coolant of the fourth group of injection mold units 12. The fourth injection mold unit 12 is used for preheating the first injection mold unit 9, the second injection mold unit 10, and the third injection mold unit 11 is used for preheating the first injection mold unit 9, the second injection mold unit 10, and the third injection mold unit 11. After the third injection mold unit 11 completes demolding and before the first injection mold unit 9 and the second injection mold unit 10 perform injection molding, the outlet transition pipe four 24, the outlet transition pipe one 21, the outlet transition pipe two 22, and the liquid outlet pipe two 18 are opened, and the liquid outlet pipe one 17, the liquid outlet pipe two 18, and the liquid outlet pipe four 20 are closed. The first injection mold unit 9, the second injection mold unit 10, and the third injection mold unit 11 are preheated by the residual heat of the coolant of the fourth injection mold unit 12. After the fourth injection mold unit 12 completes demolding, the operation steps S1-S4 are repeated.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A continuous injection mold, characterized in that: The invention comprises a turntable cover plate (1) on which a plurality of injection mold units are arranged. The turntable cover plate (1) is covered on a liquid exchange chamber and driven to rotate by a driving mechanism (2). A plurality of circulating liquid pipe ports (3) corresponding to the injection mold units are distributed on the turntable cover plate, and a group of cooling liquid pipe ports (4) are also arranged at the center. The liquid exchange chamber comprises a cooling liquid chamber (5) located at the center and a circulating liquid chamber (6) located at the periphery of the cooling liquid chamber (5). The cooling liquid pipe ports (4) are aligned with the cooling liquid chamber (5), and the circulating liquid pipe ports (3) are aligned with the circulating liquid chamber (6). The cooling liquid inlet of the injection mold unit is connected to the cooling liquid pipe ports (4) through a corresponding liquid inlet pipe, and the cooling liquid outlet is connected to the corresponding circulating liquid pipe ports (3) through a corresponding liquid outlet pipe, and two adjacent groups of cooling liquid inlets are connected to each other. The injection mold units are also connected to each other through a transition pipe to connect the coolant inlet and the coolant outlet, so that the coolant during injection molding in the injection mold unit can flow through the transition pipe to the next group of injection mold units to be injected for preheating after heat exchange. The liquid inlet pipe, the liquid outlet pipe and the transition pipe are also provided with a solenoid valve for controlling the opening and closing of the pipeline, and the coolant after heat exchange flows into the circulating liquid cavity (6) through the liquid outlet pipe at the coolant outlet of the last group of injection mold units to be injected. The circulating liquid cavity (6) is provided with a drain port, and the circulating liquid therein flows into the cooling cavity again after being condensed by a condenser. A water pump (8) is installed in the cooling cavity, and the coolant pipe port (4) is connected to the water pump (8) by installing a rotary joint. The water pump (8) is used to pump the coolant in the cooling cavity into the injection mold unit.

2. A continuous injection mold according to claim 1, characterized in that: The injection mold units are provided with four groups and are evenly distributed around the turntable cover plate (1). The four groups of injection mold units are respectively a first group of injection mold units (9), a second group of injection mold units (10), a third group of injection mold units (11) and a fourth group of injection mold units (12) which are distributed in sequence. The liquid inlet pipes of the first group of injection mold units (9), the second group of injection mold units (10), the third group of injection mold units (11) and the fourth group of injection mold units (12) are respectively a liquid inlet pipe 1 (13), a liquid inlet pipe 2 (14), a liquid inlet pipe 3 (15) and a liquid inlet pipe 4 (16); and the liquid outlet pipes are respectively The invention discloses a liquid outlet pipe 1 (17), a liquid outlet pipe 2 (18), a liquid outlet pipe 3 (19), and a liquid outlet pipe 4 (20); the transition pipes connected to the coolant outlet are respectively an outlet transition pipe 1 (21), an outlet transition pipe 2 (22), an outlet transition pipe 3 (23), and an outlet transition pipe 4 (24); the outlet transition pipe 1 (21), the outlet transition pipe 2 (22), the outlet transition pipe 3 (23), and the outlet transition pipe 4 (24) are connected to the coolant inlet of the second group of injection mold units (10), the third group of injection mold units (11), the fourth group of injection mold units (12), and the first group of injection mold units (9) in sequence.

3. A continuous working method of a continuous injection mold, based on the continuous injection mold according to claim 2, characterized in that: The steps include: S1: When the first group of injection mold units (9) rotates to one side of the injection molding machine for injection molding, the liquid inlet pipe 1 (13) and the liquid outlet pipe 4 (20) are opened, and the liquid outlet pipe 1 (17), the liquid outlet pipe 2 (18), and the liquid outlet pipe 3 (19) are closed, and the outlet transition pipe 1 (21), the outlet transition pipe 2 (22), and the outlet transition pipe 3 (23) are opened, while the outlet transition pipe 4 (24) is closed, and the cooling liquid of the first group of injection mold units (9) flows through the outlet transition pipe 1 (21), the outlet transition pipe 2 (22), and the outlet transition pipe 3 (23) through the remaining injection mold units, and flows into the circulating liquid cavity (6) through the liquid outlet pipe 4 (20); S2: Then, when the second group of injection mold units (10) rotates to one side of the injection molding machine for injection molding, the liquid inlet pipe 1 (13), the liquid inlet pipe 2 (14), the liquid outlet pipe 1 (17), and the liquid outlet pipe 4 (20) are continued to be opened, and the outlet transition pipe 1 (21), the liquid outlet pipe 2 (18), and the liquid outlet pipe 3 (19) are closed, and the outlet transition pipe 2 (22) and the outlet transition pipe 3 (23) are opened, and the outlet transition pipe 4 (24) is also closed. The cooling liquid of the second group of injection mold units (10) flows through the outlet transition pipe 2 (22) and the outlet transition pipe 3 (23) through the third group of injection mold units (11) and the fourth group of injection mold units (12), and flows into the circulating liquid cavity (6) through the liquid outlet pipe 4 (20), and the cooling liquid of the first group of injection mold units (9) also flows into the circulating liquid cavity (6) directly after heat exchange; S3: Then, when the third group of injection mold units (11) rotates to one side of the injection molding machine for injection molding, the liquid inlet pipe 1 (13), the liquid inlet pipe 2 (14), the liquid inlet pipe 3 (15), the liquid outlet pipe 1 (17), the liquid outlet pipe 2 (18), and the liquid outlet pipe 4 (20) are opened, and the outlet transition pipe 1 (21), the outlet transition pipe 2 (22), and the liquid outlet pipe 3 (19) are closed, and the outlet transition pipe 3 (23) is opened, and the outlet transition pipe 4 (24) is also closed. The coolant of the third group of injection mold units (11) flows through the outlet transition pipe 3 (23) through the fourth group of injection mold units (12), and flows into the circulating liquid cavity (6) through the liquid outlet pipe 4 (20), and the coolant of the first group of injection mold units (9) and the second group of injection mold units (10) also flows into the circulating liquid cavity (6) directly after heat exchange; S4: Then, when the fourth group of injection mold units (12) rotates to one side of the injection molding machine for injection molding, the liquid inlet pipe 1 (13), the liquid inlet pipe 2 (14), the liquid inlet pipe 3 (15), the liquid inlet pipe 4 (16), the liquid outlet pipe 1 (17), the liquid outlet pipe 2 (18), the liquid outlet pipe 3 (19), and the liquid outlet pipe 4 (20) are opened, and the outlet transition pipe 1 (21), the outlet transition pipe 2 (22), the outlet transition pipe 3 (23), the outlet transition pipe 4 (24), and the liquid outlet pipe 3 (19) are closed. The cooling liquid of the fourth group of injection mold units (12) flows into the circulating liquid cavity (6) through the liquid outlet pipe 4 (20), and the cooling liquid of the first group of injection mold units (9) and the second group of injection mold units (10) also flows into the circulating liquid cavity (6) directly after heat exchange.

4. A continuous working method of a continuous injection mold according to claim 3, characterized in that: Then, in a new round of injection molding, after the first group of injection mold units (9) completes demoulding, the outlet transition pipe four (24) and the liquid outlet pipe one (17) are opened accordingly, and the liquid outlet pipe four (20) is closed, and the first group of injection mold units (9) are preheated by using the residual heat of the coolant of the fourth group of injection mold units (12). After the second group of injection mold units (10) completes demoulding and before the first group of injection mold units (9) perform injection molding, the outlet transition pipe one (21), the outlet transition pipe four (24), and the liquid outlet pipe two (18) are opened, and the liquid outlet pipe one (17) and the liquid outlet pipe four (20) are closed, and the first group of injection mold units (9) and the second group of injection mold units (10) are preheated by using the residual heat of the coolant of the fourth group of injection mold units (12). The mold unit (10) is provided with a plurality of molds, and after the third group of injection mold units (11) completes demolding, and before the first group of injection mold units (9) and the second group of injection mold units (10) perform injection molding, the outlet transition pipe four (24), outlet transition pipe one (21), outlet transition pipe two (22), and liquid outlet pipe two (18) are opened, and the liquid outlet pipe one (17), liquid outlet pipe two (18), and liquid outlet pipe four (20) are closed, and the first group of injection mold units (9), the second group of injection mold units (10), and the third group of injection mold units (11) are preheated using the residual heat of the coolant of the fourth group of injection mold units (12), and after the fourth group of injection mold units (12) completes demolding, the operation steps S1-S4 are repeated.

5. A continuous working method of a continuous injection mold according to claim 4, characterized in that: The injection mold unit comprises a mold injection tube (25), and the injection molding machine comprises an injection nozzle (26) for docking with the mold injection tube (25) to allow raw materials to be molten and injected into the mold cavity. The mold injection tube (25) comprises a rectangular vertical tube (251) and an inclined tube (252) connected to the bottom end of the rectangular vertical tube (251) and inclined downward. The inclined tube (252) is used to connect with the mold cavity. The injection nozzle (26) comprises a rectangular vertical tube (261) and an inclined tube (262) connected to the middle of the rectangular vertical tube (261) and inclined downward. The inclined tube (262) is connected to the injection molding machine through a hose. The rectangular vertical tube (261) is driven to rise and fall by a cylinder (263), and when docking with the rectangular vertical tube (251), the raw materials are allowed to be molten and injected into the mold cavity.

6. A continuous working method of a continuous injection mold according to claim 5, characterized in that: A group of blocking blocks (253) are arranged at the bottom of the rectangular vertical tube (251). The blocking blocks (253) are lifted and lowered along the rectangular vertical tube (251) under the drive of the lifting device (254). A slope (255) is arranged on the side facing the port of the inclined tube (252). The slope (255) forms a buffer ramp for the raw material to enter the inclined tube (252) from the rectangular vertical tube (251). A group of blocking blocks (264) are arranged at the top of the rectangular vertical tube (261). The blocking blocks (264) are connected to the rectangular vertical tube (261) through a spring. The top of the rectangular vertical tube (261) is provided with an inclined surface (265) on one side facing the port of the inclined tube (262), and the inclined surface (265) forms a buffer ramp for the raw material to enter the inclined tube (262) from the rectangular vertical tube (261), and after the injection molding is completed, the blocking block (253) is driven by the lifting device (254) to pass through the rectangular vertical tube (251) and enter the rectangular vertical tube (261) and the blocking block (264) until the bottom end of the buffer ramp is connected with the inclined tube (262), and the cleaned raw material can be collected again through the inclined tube (262) to enter the injection molding machine.

7. A continuous working method of a continuous injection mold according to claim 6, characterized in that: The lifting device (254) comprises a nut block installed at the bottom of a rectangular vertical tube (251), a group of screw rods are threadedly installed on the nut block, the ends of the screw rods are connected to a blocking block (253), an outer gear ring is also provided outside the nut block, and a group of lifting motors are also installed at the bottom of the rectangular vertical tube, and the driving end of the lifting motor is meshed with the outer gear ring through the lifting gear.

8. The continuous working method of a continuous injection mold according to claim 1, characterized in that: The driving mechanism (2) comprises a mounting frame fixed outside the fluid exchange chamber, a group of driving shafts driven by a driving motor are mounted on the mounting frame, a driving gear is mounted outside the driving shaft, and an external gear ring 2 is arranged outside the turntable cover plate (1) and meshes with the driving gear for transmission.

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