Energy-saving high-low pressure large capacity injection molding machine

Abstract

The utility model relates to the technical field of plastic processing and forming equipment, disclose a kind of energy-saving high-low pressure large capacity injection molding machine to solve the problem of energy waste caused by heat loss of existing injection molding machine barrel, peripheral electrical components aging. It includes rack, mold closing mechanism, barrel mechanism, power mechanism and other basic components, newly added collection cover, cover barrel, bottom is provided with air hole, top end is opened long strip opening, heat exchange frame, is equipped in collection cover top end, adapts long strip opening, serpentine heat exchange copper pipe, is equipped in heat exchange frame, water storage tank, by fixed mechanism is equipped in rack, drain pipe is connected with heat exchange copper pipe input end;Heat exchange frame top end is equipped with wind collecting hood and exhaust fan, exhaust fan is connected with exhaust pipe and branch pipe, branch pipe is connected with plastic particle drying machine hot air pipe, all are equipped with electric air valve, water storage tank is connected with water supply pipe and is internally provided with automatic float valve. The equipment can recover barrel heat to heat water, and can also reuse hot air, improve energy utilization, protect electrical components, reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of plastic processing and molding equipment technology, and in particular to an energy-saving high and low pressure large-capacity injection molding machine. Background Technology

[0002] In the plastics processing industry, high- and low-pressure large-capacity injection molding machines, with their core advantages of "large-capacity feeding" and "high- and low-pressure segmented molding," can meet the one-time molding needs of large-size, thick-walled plastic parts, and have become key equipment for the production of large plastic components. Their working principle is as follows: granular plastic raw materials enter the barrel through the feeding mechanism. Electric heaters wrapped around or embedded in the outer wall of the barrel generate heat when energized, heating the granules in the barrel to a molten state. Subsequently, the molten plastic is injected into the mold cavity under high pressure by the screw to complete the molding process. After the mold cools, the finished product is removed. In some processes, a low-pressure holding stage is also required to improve the density and dimensional accuracy of the plastic parts.

[0003] However, existing high- and low-pressure, large-capacity injection molding machines suffer from significant energy waste in the barrel heating process. To ensure sufficient melting of the granules and stable flowability of the molten plastic, the barrel needs to be heated to 180℃-350℃ (the specific temperature is adjusted according to the plastic material). However, only 40%-60% of the heat generated by the heater is used for granule melting and molten material insulation, while the remaining 30%-50% of the heat is directly dissipated into the surrounding environment through the barrel's outer wall. This heat waste not only significantly reduces the energy efficiency of the injection molding machine, but also, prolonged high-temperature heat dissipation may cause thermal aging of electrical components around the barrel (such as temperature sensors and control circuits), shortening component lifespan and increasing equipment maintenance frequency and costs.

[0004] Currently, industry improvements to address these issues are mostly limited to simply wrapping the barrel with insulation cotton, which offers limited insulation and fails to recover lost heat. Some high-end equipment attempts to replace traditional resistance heating with infrared or electromagnetic heating, which slightly improves heating efficiency but still doesn't fundamentally solve the core problem of heat loss from the barrel. Therefore, how to reduce barrel heat waste and improve energy efficiency through structural optimization has become a critical technical challenge that existing high and low pressure, large-capacity injection molding machines urgently need to address. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an energy-saving high and low pressure large-capacity injection molding machine that can recover and utilize the heat lost from the barrel, thereby improving energy utilization efficiency.

[0006] This utility model discloses an energy-saving high and low pressure large-capacity injection molding machine, including a frame, a mold closing mechanism on one side of the top of the frame, a moving mold and a fixed mold in the mold closing mechanism, a barrel mechanism connected to the fixed mold side of the mold closing mechanism, a power mechanism at the right end of the barrel mechanism, a hopper at the top right side of the barrel mechanism, a heating component and a temperature sensor in the barrel mechanism, a central control unit on the right side of the frame, and a control panel assembly at the top edge of the frame. The machine also includes:

[0007] The collection hood is installed at the top of the frame, and the material cylinder mechanism is located inside the collection hood. The top of the collection hood is provided with a long strip opening, and several ventilation holes are provided on the side wall at the bottom.

[0008] The heat exchange frame is installed on the top outer wall of the collection hood. The size of the elongated opening is adapted to the size of the heat exchange frame, and the elongated opening is located inside the heat exchange frame.

[0009] The heat exchange copper tube is installed inside the heat exchange frame and is located directly above the long opening. The inlet end of the heat exchange copper tube extends to the rear side of the heat exchange frame, and its outlet end extends to the front side of the heat exchange frame. Both the inlet and outlet ends of the heat exchange copper tube are equipped with reducing pipes.

[0010] The water storage tank is installed on the top of the frame by a fixing mechanism. A drain pipe is connected to the bottom side wall of the water storage tank. A flow valve is installed on the drain pipe. The drain pipe is connected to the reducer at the input end of the heat exchange copper tube. The reducer at the output end of the heat exchange copper tube is connected to the hot water storage mechanism through a delivery pipe. The longitudinal height of the drain pipe of the water storage tank is higher than that of the heat exchange copper tube.

[0011] Furthermore, an air collecting hood is connected to the top of the heat exchange frame, and an exhaust fan is installed on the top of the air collecting hood. The exhaust fan is powered by the injection molding machine, and the central control unit is connected to the exhaust fan signal line.

[0012] Furthermore, the heat exchange copper tubes are arranged in a serpentine pattern with continuous bends.

[0013] Furthermore, an exhaust duct is connected to the top of the exhaust fan, and a branch pipe is connected to the side wall of the exhaust duct. Electric air valves are installed at the output ends of both the exhaust duct and the branch pipe. Both electric air valves are electrically connected to the central control unit, and the control panel assembly is equipped with two switch control buttons for the electric air valves. The output side of the electric air valve of the branch pipe is connected to the hot air duct of the plastic granule dryer of the injection molding machine.

[0014] Furthermore, the fixing mechanism includes a fixing plate, which is installed at the top rear end of the frame. A stabilizing plate is provided at the bottom end of the fixing frame, and the water storage tank is installed at the top of the fixing plate via a lifting frame.

[0015] Furthermore, the side wall of the exhaust fan is provided with a reinforcing frame, which is fixedly installed on the top of the frame.

[0016] Furthermore, a water supply pipe is connected to the top side wall of the water storage tank, and the water supply pipe is connected to the tap water pipe of the factory. A stainless steel float valve is installed at the outlet of the water supply pipe inside the water storage tank.

[0017] Furthermore, the reinforcing frame is equipped with an auxiliary frame, which is used to stabilize the exhaust pipe and branch pipe.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. Highly efficient heat recovery and improved energy utilization: By combining the collection hood, heat exchange frame and heat exchange copper tube, 30%-50% of the heat lost from the material cylinder can be recovered and used to heat cold water, converting the originally wasted heat into usable heat energy and reducing energy loss.

[0020] 2. Protect surrounding electrical components and reduce maintenance costs: The collection cover can limit the heat from the barrel to spread to the surroundings, avoid thermal aging of electrical components such as temperature sensors and control circuits caused by high temperature, extend the service life of components, and reduce the frequency and cost of equipment maintenance.

[0021] 3. Secondary utilization of heat, expanding energy-saving scenarios: The combination of exhaust fan, exhaust duct and branch pipe can control the direction of the hot air after heat exchange through electric air valve, and introduce it into the hot air duct of the plastic granule dryer to provide preheating air for the dryer, realizing secondary heat recovery; moreover, the exhaust fan and temperature sensor can switch between natural convection heat dissipation and active heat dissipation of the material cylinder mechanism, avoiding excessive temperature of the material cylinder mechanism and reducing the failure rate.

[0022] 4. Improved ease of operation and equipment stability: The stainless steel float valve of the water storage tank can automatically replenish water, eliminating the need for frequent manual water filling; the reinforcement frame and auxiliary frame respectively fix the exhaust fan, exhaust pipe and branch pipe to prevent the components from shaking during operation and ensure the overall reliability of the equipment.

[0023] 5. Optimized heat exchange efficiency: The heat exchange copper tubes adopt a serpentine arrangement structure, which greatly increases the contact area with hot air, allowing cold water to absorb heat more fully and improve the heat exchange effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the connection structure between the fixing plate and the frame of this utility model;

[0026] Figure 3 This is a schematic diagram of the connection structure between the heat exchange copper tube and the heat exchange frame of this utility model;

[0027] The following components are labeled in the attached diagram: 1. Frame; 2. Mold closing mechanism; 3. Moving mold; 4. Fixed mold; 5. Material cylinder mechanism; 6. Power mechanism; 7. Hopper; 8. Heating component; 9. Temperature sensor; 10. Control panel assembly; 11. Collection cover; 12. Heat exchange frame; 13. Heat exchange copper pipe; 14. Water storage tank; 15. Drain pipe; 16. Air collection cover; 17. Exhaust fan; 18. Exhaust duct; 19. Electric air valve; 20. Branch pipe; 21. Fixing plate; 22. Stabilizing plate; 23. Reinforcing frame; 24. Water supply pipe; 25. Stainless steel float valve; 26. Auxiliary frame. Detailed Implementation

[0028] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0029] like Figures 1 to 3 As shown, this utility model discloses an energy-saving high and low pressure large-capacity injection molding machine, including a frame 1. A mold closing mechanism 2 is provided on one side of the top of the frame 1. The mold closing mechanism 2 is provided with a moving mold 3 and a fixed mold 4. A barrel mechanism 5 is connected to the fixed mold 4 side of the mold closing mechanism 2. A power mechanism 6 is provided at the right end of the barrel mechanism 5. A hopper 7 is provided on the top right side of the barrel mechanism 5. The barrel mechanism 5 is provided with a heating component 8 and a temperature sensor 9. A central control unit is provided on the right side of the frame 1. A control panel assembly 10 is provided on the top edge of the frame 1. The machine also includes:

[0030] Collection cover 11 is installed on the top of the frame 1, and the material cylinder mechanism 5 is located inside the collection cover 11. The top of the collection cover 11 is provided with a long strip opening, and several ventilation holes are provided on the side wall at the bottom.

[0031] The heat exchange frame 12 is installed on the top outer wall of the collection cover 11. The size of the elongated opening is adapted to the size of the heat exchange frame 12, and the elongated opening is located inside the heat exchange frame 12.

[0032] The heat exchange copper tube 13 is installed inside the heat exchange frame 12 and is located directly above the elongated opening. The input end of the heat exchange copper tube 13 extends to the rear side of the heat exchange frame 12, and its output end extends to the front side of the heat exchange frame 12. Both the input and output ends of the heat exchange copper tube 13 are equipped with reducing pipes. The heat exchange copper tube 13 is configured as a serpentine arrangement with continuous bends.

[0033] A water storage tank 14 is mounted on the top of the frame 1 via a fixing mechanism. A drain pipe 15 is connected to the bottom side wall of the water storage tank 14. A flow valve is installed on the drain pipe 15. The drain pipe 15 is connected to the reducer at the input end of the heat exchange copper tube 13. The reducer at the output end of the heat exchange copper tube 13 is connected to the hot water storage mechanism via a delivery pipe. The longitudinal height of the drain pipe 15 in the water storage tank 14 is higher than that of the heat exchange copper tube 13.

[0034] The fixing mechanism includes a fixing plate 21, which is installed on the top of the rear end of the frame 1. A stabilizing plate 22 is provided at the bottom of the fixing frame, and the water storage tank 14 is installed on the top of the fixing plate 21 via a lifting frame.

[0035] In this embodiment,

[0036] Collection hood 11: Covers the material cylinder mechanism 5, on the one hand, it collects the heat lost by the material cylinder to provide a heat source for subsequent heat exchange; on the other hand, it restricts the heat from spreading to the surrounding area and protects electrical components; the bottom vent allows natural air circulation inside and outside the collection hood 11 when the exhaust fan 17 is not running, providing basic natural convection heat dissipation for the material cylinder mechanism 5; the long opening at the top provides a channel for hot air to enter the heat exchange frame 12 upwards, taking into account both heat collection and basic heat dissipation requirements;

[0037] Heat exchange frame 12: Installed on the top of the collection cover 11, its size is adapted to the long strip opening, which not only provides a stable installation carrier for the serpentine heat exchange copper tube 13, but also limits the flow range of hot air in the frame, reduces heat leakage, ensures that the hot air and the heat exchange copper tube 13 are in full contact, and improves heat exchange efficiency.

[0038] The serpentine heat exchange copper tube 13 is installed inside the heat exchange frame 12 and faces the long strip opening. It adopts a continuous bend structure to greatly increase the contact area with hot air. The cold water flowing inside the tube can fully absorb the heat in the hot air and convert the originally wasted heat into hot water to achieve heat recovery. The reducing pipes at both ends are used to adapt to the pipe diameters of the water storage tank 14 drain pipe 15 and the hot water delivery pipe to ensure that the pipeline connection is sealed and the water flow is smooth.

[0039] Water storage tank 14: Installed on top of frame 1 by a fixing mechanism, it is used to store cold water and continuously supply heat exchange copper tube 13 with heat exchange water source; its drain pipe 15 is higher in the longitudinal height than heat exchange copper tube 13, and cold water flows naturally by gravity without the need for additional power drive; the flow valve on drain pipe 15 can adjust the water supply according to heat exchange demand, and flexibly adapt to different working conditions.

[0040] Fixing mechanism: The fixing plate 21 is installed on the top of the rear end of the frame 1 to provide a stable installation base for the water storage tank 14; the stabilizing plate 22 enhances the connection strength between the fixing plate 21 and the frame 1 to prevent the fixing plate 21 from deforming under stress; the lifting frame raises the height of the water storage tank 14 to ensure that the drain pipe 15 and the heat exchange copper pipe 13 form a sufficient height difference to meet the gravity water supply conditions and ensure that cold water flows steadily into the heat exchange copper pipe 13.

[0041] As a preferred embodiment of the above embodiment, the top of the heat exchange frame 12 is connected to an air collecting hood 16, and an exhaust fan 17 is installed on the top of the air collecting hood 16. The exhaust fan 17 is powered by the injection molding machine, and the central control unit is connected to the signal line of the exhaust fan 17.

[0042] In this embodiment,

[0043] Air collector hood 16: Installed at the top of the heat exchange frame 12, its function is to collect the hot air after heat exchange and guide the dispersed hot air to the exhaust fan 17, so as to prevent the hot air from accumulating at the top of the heat exchange frame 12, and at the same time reduce the diffusion of hot air to the surrounding environment, and improve the efficiency of hot air exhaust or secondary utilization.

[0044] Exhaust fan 17: Powered by the injection molding machine, and linked with the central control unit and temperature sensor 9 via a signal line; its core functions are twofold: First, it actively accelerates the airflow within the collection hood 11 and heat exchange frame 12, promoting the heat exchange efficiency between hot air and heat exchange copper tube 13, and improving the heat recovery effect; Second, based on the signal transmitted by temperature sensor 9, it coordinates with the central control unit to switch the heat dissipation mode. When the temperature inside the barrel is within the normal process range, exhaust fan 17 does not start, and natural convection heat dissipation is achieved through the vents at the bottom of the collection hood 11; When temperature sensor 9 detects that the temperature inside the barrel exceeds the threshold, exhaust fan 17 starts to actively dissipate heat, quickly removing the extra heat lost from the surface of the barrel by accelerating the airflow within the collection hood 11, indirectly helping to reduce the temperature inside the barrel and preventing the barrel mechanism 5 from overheating;

[0045] Temperature sensor 9: Installed around the material cylinder mechanism 5, its new function is to detect the internal temperature of the material cylinder in real time, convert the temperature signal into an electrical signal and transmit it to the central control unit as the basis for judging the start and stop of the exhaust fan 17, provide data support for the switching between natural convection heat dissipation and active heat dissipation, and prevent the material cylinder mechanism 5 from malfunctioning due to excessive temperature.

[0046] As a preferred embodiment of the above embodiment, an exhaust pipe 18 is connected to the top of the exhaust fan 17, a branch pipe 20 is connected to the side wall of the exhaust pipe 18, and an electric air valve 19 is installed at the output end of both the exhaust pipe 18 and the branch pipe 20. Both electric air valves 19 are electrically connected to the central control unit, and the control panel assembly 10 is provided with two switch control buttons for the electric air valves 19. The output side of the electric air valve 19 of the branch pipe 20 is connected to the hot air pipe of the plastic granule dryer of the injection molding machine.

[0047] In this embodiment,

[0048] Exhaust duct 18: One end is connected to the air outlet of exhaust fan 17. Its function is to receive the hot air discharged by exhaust fan 17. When the hot air does not need to be reused, it is directed to the outside of the factory or a designated area through exhaust duct 18 to avoid the accumulation of hot air around the equipment and help maintain the stable operating temperature of the equipment.

[0049] Branch pipe 20: One end is connected to the side wall of exhaust pipe 18, and the other end is connected to the hot air pipe of the plastic granule dryer of the injection molding machine. Its function is to provide a secondary utilization channel for the hot air after heat exchange, to introduce the hot air that should have been discharged into the dryer, to provide preheated air for drying plastic granules, to reduce the heating energy consumption of the dryer itself, and to realize secondary heat recovery.

[0050] Electric air valve 19: Installed at the output end of exhaust pipe 18 and branch pipe 20 respectively, electrically connected to the central control unit and controllable by the control panel button; its function is to switch the direction of hot air. When hot air needs to be reused, the electric air valve 19 of exhaust pipe 18 is closed and the electric air valve 19 of branch pipe 20 is opened, and hot air enters the dryer; when reuse is not required, the operation is reversed to ensure that hot air is diverted as needed and flexibly adapted to different energy-saving scenarios.

[0051] As a preferred embodiment of the above, the side wall of the exhaust fan 17 is provided with a reinforcing frame 23, which is fixedly installed on the top of the frame 1. An auxiliary frame 26 is provided on the reinforcing frame 23, which is used to stabilize the exhaust pipe 18 and the branch pipe 20.

[0052] In this embodiment,

[0053] Reinforcing frame 23: Installed on the side wall of exhaust fan 17 and fixed to the top of frame 1, its function is to support and reinforce exhaust fan 17 which vibrates during operation, to prevent exhaust fan 17 from becoming loose due to vibration, to ensure stable operation of exhaust fan 17, and to avoid affecting heat dissipation or heat exchange effect due to component shaking.

[0054] Auxiliary frame 26: Set on the reinforcement frame 23, its function is to fix and limit the exhaust pipe 18 and branch pipe 20, prevent the pipe from shifting or bending due to its own weight, airflow impact or equipment vibration, ensure the pipe is unobstructed, avoid hot air leakage at pipe connection, and ensure heat transfer efficiency.

[0055] As a preferred embodiment of the above embodiment, a water supply pipe 24 is provided on the top side wall of the water storage tank 14. The water supply pipe 24 is connected to the tap water pipe of the factory. A stainless steel float valve 25 is installed at the outlet of the water supply pipe 24 inside the water storage tank 14.

[0056] In this embodiment,

[0057] Water supply pipe 24: One end is connected to the factory's tap water pipe, and the other end is connected to the top side wall of the water storage tank 14. Its function is to replenish cold water to the water storage tank 14, ensuring that the water storage tank 14 always has a sufficient water supply to meet the heat exchange needs, and avoiding heat exchange interruption due to water shortage.

[0058] Stainless steel float valve 25: Installed at the outlet of the water supply pipe 24 inside the water storage tank 14, its function is to realize automatic water replenishment of the water storage tank 14. When the water level in the water storage tank 14 is lower than the set value, the float valve opens as the water level drops, and tap water flows into the water storage tank 14 through the water supply pipe 24; when the water level reaches the set height, the float valve closes as the water level rises, stopping water replenishment. This eliminates the need for frequent manual checks and water additions, improving operational convenience and ensuring continuous operation of the equipment.

[0059] The working principle of this utility model is as follows:

[0060] After the injection molding machine starts, the heating component 8 of the barrel mechanism 5 raises the internal temperature to the required melting temperature (180℃-350℃) for the corresponding plastic material. The granular plastic enters the barrel through the hopper 7 and melts. During the process, heat is continuously dissipated from the outer wall of the barrel. The overall workflow revolves around the dual core of "temperature control + heat recovery", as detailed below:

[0061] 1. Temperature detection and adaptive switching of heat dissipation modes

[0062] Temperature sensor 9 on the barrel mechanism 5 monitors the internal temperature of the barrel in real time and transmits the data to the central control unit.

[0063] When the internal temperature is within the normal process range (meeting the requirements for plastic melting and not exceeding the safety threshold), the exhaust fan 17 remains closed. At this time, the heat lost from the barrel naturally rises due to the air density difference. The vent at the bottom of the collection cover 11 simultaneously replenishes the outside cold air, forming a stable natural convection. The hot air flows upward along the internal space of the collection cover 11 and enters the heat exchange frame 12 through the long opening at the top, starting the "natural convection heat exchange mode".

[0064] When the internal temperature exceeds the set threshold (which may cause the plastic to overheat and degrade, or damage the barrel components), the central control unit immediately starts the exhaust fan 17 and enters the "active heat dissipation mode": the exhaust fan 17 generates negative pressure through the air collection shroud 16, which accelerates the air circulation in the collection shroud 11, so that the heat lost by the barrel is carried to the heat exchange frame 12 by the airflow more quickly. At the same time, by strengthening the airflow, it indirectly helps to reduce the temperature of the outer wall of the barrel, thereby inhibiting the continuous rise of the internal temperature.

[0065] 1. Heat recovery and heat exchange processes under the two modes

[0066] Regardless of whether it is natural convection or active heat dissipation mode, the heat exchange copper tube 13 is always in working condition.

[0067] The cold water in the water storage tank 14 flows into the serpentine heat exchange copper tube 13 after being regulated by the flow valve under the action of gravity (the height of the drain pipe 15 of the water storage tank 14 is higher than that of the heat exchange copper tube 13); the hot air entering the heat exchange frame 12 (rising naturally or being pushed by the exhaust fan 17 at an accelerated speed) fully contacts with the copper tube, heat is transferred to the cold water through the tube wall, the cold water absorbs heat and is converted into hot water, which then flows into the hot water storage mechanism through the reducing pipe and the delivery pipe at the output end of the copper tube, completing heat recovery. Among them, in the active heat dissipation mode, due to the faster air flow speed and more sufficient hot air volume, the heat exchange efficiency is significantly higher than that in the natural convection mode, but both modes can realize the recovery and utilization of the heat dissipated by the barrel, avoiding heat waste.

[0068] 2. Flexible treatment of hot air after heat exchange

[0069] The flow direction of the hot air after heat exchange (whose temperature is lower than that before heat exchange but still has a certain amount of residual heat) is controlled by the electric air valve 19, and the operation is available under both heat dissipation modes:

[0070] If the plastic particle dryer supporting the injection molding machine needs preheated air, the operator closes the electric air valve 19 of the exhaust pipe 18 and opens the electric air valve 19 of the branch pipe 20 through the control panel, and the hot air is introduced into the hot air pipe of the dryer through the branch pipe 20 to provide auxiliary heat source for plastic particle drying, realizing secondary heat utilization;

[0071] If secondary utilization is not required, or the temperature of the hot air can no longer meet the drying requirements, the electric air valve 19 of the exhaust pipe 18 is opened and the electric air valve 19 of the branch pipe 20 is closed, and the hot air is discharged to the designated area of the workshop through the exhaust pipe 18, so as to avoid accumulating around the equipment and affecting the ambient temperature;

[0072] Both of the above two heat dissipation modes need to ensure that the temperature monitored in real time by the temperature sensor 9 on the barrel mechanism 5 is within the normal working range. Once the data of the temperature sensor 9 is lower than the threshold value, the exhaust fan 17 will not work.

[0073] 4. Continuous guarantee of heat exchange water source

[0074] The water replenishing pipe 24 at the top of the water storage tank 14 is communicated with the tap water pipe of the workshop, and a stainless steel float valve 25 is installed at the water outlet of the water replenishing pipe 24 located inside the water storage tank 14: when the water level in the water storage tank 14 drops due to continuous water supply to the heat exchange copper tube 13, the float valve automatically opens as the water level decreases, and tap water is injected into the water storage tank 14; when the water level rises back to the set height, the float valve automatically closes as the water level rises, realizing automatic water replenishment without manual on-duty, ensuring that the heat exchange copper tube 13 always has a stable cold water supply under both heat dissipation modes, and the heat recovery process is not interrupted.

[0075] Purpose of the hot water stored in the hot water storage mechanism:

[0076] Production support: It can be used for heat preservation after drying plastic raw materials, mold preheating in low mold temperature processes, or water preheating of equipment cooling systems, replacing part of electric heating and reducing production energy consumption;

[0077] Factory cleaning: Used for cleaning equipment, workshop floors and raw material handling tools. Hot water at 40℃-60℃ can effectively remove oil stains, soften debris, and improve cleaning efficiency.

[0078] Employee living: Connect to the hot water pipe network of the factory's handwashing stations and changing rooms to meet employees' basic heating needs such as handwashing, reducing logistics heating costs;

[0079] Low-temperature scenarios: In winter, it can be used for heating liquid auxiliary material pipelines (to prevent solidification) and for irrigation of green areas in the factory (to prevent frost damage to vegetation), making full use of waste heat.

[0080] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An energy-saving high and low pressure large capacity injection molding machine, comprising a frame (1), a mold clamping mechanism (2) is provided on one side of the top of the frame (1), the mold clamping mechanism (2) is provided with a moving mold (3) and a fixed mold (4), a barrel mechanism (5) is connected to the fixed mold (4) side of the mold clamping mechanism (2), a power mechanism (6) is provided at the right end of the barrel mechanism (5), a hopper (7) is provided on the right side of the top of the barrel mechanism (5), a heating component (8) and a temperature sensor (9) are provided in the barrel mechanism (5), a central control unit is provided on the right side of the frame (1), and a control panel assembly (10) is provided at the top edge of the frame (1), characterized in that, Also includes: Collection hood (11) is installed on the top of the frame (1), and the material cylinder mechanism (5) is located inside the collection hood (11). The top of the collection hood (11) is provided with a long strip opening, and several ventilation holes are provided on the side wall at the bottom. Heat exchange frame (12) is installed on the top outer wall of the collection cover (11). The size of the elongated opening is adapted to the size of the heat exchange frame (12), and the elongated opening is located inside the heat exchange frame (12). Heat exchange copper tube (13) is installed inside the heat exchange frame (12) and located directly above the long strip opening. The input end of the heat exchange copper tube (13) extends to the rear side of the heat exchange frame (12), and its output end extends to the front side of the heat exchange frame (12). Both the input and output ends of the heat exchange copper tube (13) are equipped with reducing pipes. A water storage tank (14) is installed on the top of the frame (1) by a fixing mechanism. A drain pipe (15) is connected to the bottom side wall of the water storage tank (14). A flow valve is installed on the drain pipe (15). The drain pipe (15) is connected to the reducer at the input end of the heat exchange copper tube (13). The reducer at the output end of the heat exchange copper tube (13) is connected to the hot water storage mechanism through a conveying pipe. The longitudinal height of the drain pipe (15) of the water storage tank (14) is higher than that of the heat exchange copper tube (13).

2. The energy-saving high and low pressure large-capacity injection molding machine as described in claim 1, characterized in that, The top of the heat exchange frame (12) is connected to an air collecting hood (16), and an exhaust fan (17) is installed on the top of the air collecting hood (16). The exhaust fan (17) is powered by the injection molding machine, and the central control unit is connected to the signal line of the exhaust fan (17).

3. The energy-saving high and low pressure large-capacity injection molding machine as described in claim 1, characterized in that, The heat exchange copper tube (13) is arranged in a serpentine pattern with continuous bends.

4. The energy-saving high and low pressure large-capacity injection molding machine as described in claim 2, characterized in that, The exhaust fan (17) is connected to an exhaust pipe (18) at its top. A branch pipe (20) is connected to the side wall of the exhaust pipe (18). Electric air valves (19) are installed at the output ends of both the exhaust pipe (18) and the branch pipe (20). Both electric air valves (19) are electrically connected to the central control unit. The control panel assembly (10) is equipped with two switch control buttons for the electric air valves (19). The output side of the electric air valve (19) of the branch pipe (20) is connected to the hot air pipe of the plastic granule dryer of the injection molding machine.

5. An energy-saving high and low pressure large-capacity injection molding machine as described in claim 1, characterized in that, The fixing mechanism includes a fixing plate (21), which is installed at the top of the rear end of the frame (1). A stabilizing plate (22) is provided at the bottom of the fixing frame, and the water tank (14) is installed at the top of the fixing plate (21) by a lifting frame.

6. An energy-saving high and low pressure large-capacity injection molding machine as described in claim 2, characterized in that, The side wall of the exhaust fan (17) is provided with a reinforcing frame (23), which is fixedly installed on the top of the frame (1).

7. An energy-saving high and low pressure large-capacity injection molding machine as described in claim 1, characterized in that, The top side wall of the water storage tank (14) is connected to a water supply pipe (24), which is connected to the tap water pipe of the factory. A stainless steel float valve (25) is installed at the outlet of the water supply pipe (24) inside the water storage tank (14).

8. An energy-saving high and low pressure large-capacity injection molding machine as described in claim 6, characterized in that, An auxiliary frame (26) is provided on the reinforcing frame (23), which is used to stabilize the exhaust pipe (18) and the branch pipe (20).

Images