Efficient energy-saving injection molding machine

Abstract

The invention relates to the field of injection molding machines, in particular to an efficient energy-saving injection molding machine which comprises a supporting seat, an injection mechanism and a mold locking mechanism are connected to the supporting seat, the mold locking mechanism comprises a first supporting plate fixed to the supporting seat, a first mold is fixed to the left side face of the first supporting plate, and the first mold is connected with a second mold in an openable and closable mode. An opening and closing driving mechanism is arranged on the second mold, a mold cavity is formed after the second mold and the first mold are closed, a cavity is formed in the second mold, a preheating container capable of entering and exiting the cavity is arranged in the cavity, the preheating container is connected with a connecting plate through an elastic structure, and the connecting plate is connected with an entering and exiting driving mechanism; heat of high-temperature molten plastic raw materials in the mold cavity is fully utilized in the pressure maintaining process, the plastic raw materials in the preheating container are preheated, and energy is greatly saved; and after pressure maintaining is finished and the preheating container is pulled out of the cavity, the second mold can be rapidly cooled, and meanwhile the heat dissipation effect on the mold cavity is improved.

Description

Technical Field

[0001] The invention relates to the field of injection molding machines, and in particular to a high-efficiency energy-saving injection molding machine. Background Art

[0002] Injection molding machine is also called injection molding machine or injection machine. Its working principle is similar to that of a syringe for injection. It uses the thrust of the screw (or plunger) to inject the plasticized molten state (i.e. viscous flow state) plastic into the closed mold cavity, and obtains the product after solidification. Injection molding is a cyclic process. Each cycle mainly includes: quantitative feeding - melt plasticization - pressure injection - mold filling and cooling - mold opening and taking out the plastic parts. After taking out the plastic parts, the mold is closed again for the next cycle. Generally, an injection molding machine includes an injection device, a mold clamping device, a hydraulic system, and an electrical control system.

[0003] In the existing injection molding process, in order to ensure that the plastic raw materials can fully fill the mold cavity after injection and avoid defects or incomplete products, the injection molding machine needs to maintain pressure for a certain period of time after injecting the high-temperature molten plastic raw materials into the mold cavity, and then cool it. During this pressure-maintaining process, the high-temperature molten plastic raw materials in the mold cavity will transfer its heat to the mold, so that the temperature of the mold will also increase accordingly. The high-temperature molten plastic raw materials in the mold cavity and the high-temperature mold need to be cooled by the subsequent cooling mechanism. On the one hand, this leads to a large amount of heat in the pressure-maintaining process cannot be effectively utilized, resulting in a waste of heat energy, which is not conducive to energy conservation. On the other hand, it also increases the working pressure of the subsequent cooling mechanism and reduces the cooling efficiency. For example, the patent with application number CN202420469010.9 discloses an injection molding machine with a rapid injection molding mechanism. After the injection molding machine injects the injection molding melt into the injection molding tube, it is subsequently directly cooled by the cooling hood and cooling tube. The injection molding machine has the above-mentioned problems. Therefore, there is an urgent need for an injection molding machine that can effectively utilize the heat of high-temperature molten plastic raw materials during the pressure holding process and improve the cooling efficiency. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a high-efficiency and energy-saving injection molding machine, which solves the problems existing in the prior art. The injection molding machine can not only effectively utilize the heat of the high-temperature molten plastic raw material during the pressure holding process, but also greatly improve the cooling efficiency.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solution: An energy-efficient injection molding machine, comprising a support base, on which an injection mechanism and a mold clamping mechanism are connected. The mold clamping mechanism includes a first support plate fixed on the support base. A first mold is fixed on the left side surface of the first support plate. The first mold is connected to a second mold in an openable and closable manner. An opening and closing driving mechanism is provided on the second mold. After the second mold is clamped with the first mold, a mold cavity is formed. A cavity is formed on the second mold, and a preheating container that can enter and exit the cavity is provided inside the cavity. The preheating container is connected to a connecting plate through an elastic structure, and the connecting plate is connected to an entering and exiting driving mechanism.

[0008] Preferably, the opening and closing driving mechanism includes a second support plate fixed on the support base. A first oil cylinder is fixedly penetrated through the second support plate. The end of the piston rod of the first oil cylinder is fixed with a first moving plate. The first moving plate is connected to a second moving plate through a plurality of first connecting rods. The second moving plate is connected to the second mold through a plurality of second connecting rods.

[0009] Preferably, the bottoms of the first moving plate and the second moving plate are both slidably connected to the support base. A third support plate is provided between the first moving plate and the second moving plate. The third support plate is fixed on the support base, and the first connecting rod penetrates through the third support plate. A stop block is fixed on the third support plate. A connecting shaft opposite to the stop block is penetrated through the second moving plate. A first fixing block is fixed on the right end of the connecting shaft. A second fixing block is fixed on the first fixing block. A third fixing block opposite to the second fixing block is fixed on the second mold. A thimble is fixed on the second fixing block. The thimble sequentially penetrates through a first spring, the third fixing block and the second mold. The left end of the first spring is fixed on the second fixing block, and its right end is fixed on the third fixing block.

[0010] Preferably, the injection mechanism includes a motor slidably connected to the support base. A screw rod is connected to the output shaft of the motor. An extrusion head is fixed on the left end of the screw rod. The screw rod is arranged inside a barrel. A heating body is fixed on the outer wall of the barrel. A feed hopper is communicated near the right end of the barrel. The left end of the barrel is fixed on the first support plate, and an injection hole is formed at the left end of the barrel. An injection passage communicated with the injection hole is formed on the first mold. The left end of the injection passage is communicated with the mold cavity.

[0011] Preferably, the motor is fixed on a housing. The housing is slidably connected to the support base. A second oil cylinder is fixed on the housing. The end of the piston rod of the second oil cylinder is fixed on the first support plate.

[0012] Preferably, the entering and exiting driving mechanism includes a third oil cylinder fixedly penetrated through the second moving plate. The end of the piston rod of the third oil cylinder is fixed with a connecting plate.

[0013] Preferably, the preheating container includes a feeding part that matches the length and height of the cavity. The top of the feeding part is provided with a feeding port. The feeding part is connected to a discharging part. The top surface of the discharging part is lower than the top surface of the feeding part. The bottom surface of the discharging part is inclined upward from left to right, and its right side is set as a discharging port. The upper part of the first support plate is fixed with a fourth support plate. A fourth oil cylinder is fixed on the fourth support plate. The end of the piston rod of the fourth oil cylinder is fixed with a pressing plate, and a feeding pipe is fixed on the left side of the piston rod of the fourth oil cylinder. A material receiving mechanism is arranged on the support seat.

[0014] Preferably, the material receiving mechanism includes a material receiving hopper arranged below the preheating container. The bottom of the material receiving hopper is communicated with a first suction pipe. The first suction pipe is communicated with a material passing interlayer. The material passing interlayer is communicated with a second suction pipe. The second suction pipe is communicated with a feeding hopper. A suction pump is arranged on the second suction pipe. The material passing interlayer is arranged in the heat preservation layer. The heat preservation layer is wrapped outside the heating body and is fixed to the barrel.

[0015] Preferably, there are two sets of mixing mechanisms, upper and lower, on the left side wall of the preheating container. The mixing mechanism includes a first air bag fixed on the left side wall of the preheating container. The first air bag is communicated with a communicating pipe. The communicating pipe penetrates through the preheating container and extends into the interior of the preheating container. The inner end of the communicating pipe is communicated with a second air bag. The second air bag is fixed on the inner wall of the preheating container.

[0016] Preferably, cooling mechanisms are arranged on the first mold and the second mold.

[0017] (III) Beneficial effects

[0018] 1. Through the setting of the preheating container in the present invention, during the time period of maintaining the pressure of the molten plastic raw material injected into the mold cavity, the granular plastic raw material in the preheating container is heated by the way. In this way, the heat of the high-temperature molten plastic raw material in the mold cavity is fully utilized during the pressure maintaining process, and the plastic raw material in the preheating container is preheated and dried to a certain extent. Thus, the granular plastic raw material entering the injection mechanism does not need to be preheated and dried additionally, greatly saving energy. After the pressure maintaining is completed and the preheating container is pulled out of the cavity, a large part of the second mold will be missing, so that the second mold can be quickly cooled, and at the same time, the heat dissipation effect of the mold cavity is improved, and finally the cooling efficiency and effect are improved.

[0019] 2. Through the setting of structures such as the stop block and the ejector pin in the present invention, the efficiency of taking out the finished product in the mold cavity is greatly improved.

[0020] 3. The top surface of the discharging part of the preheating container in the present invention is set lower than the top surface of the feeding part, and the bottom surface of the discharging part is inclined upward from left to right, so that the preheating container forms a shape with a larger left end and a smaller right end, which greatly facilitates the entry of the preheating container into the cavity. Among them, the bottom surface of the discharging part is inclined upward from left to right, which facilitates the pouring of the plastic raw materials in the preheating container to the outside. Among them, the discharging part is also the place where the pressing plate presses the preheating container. Among them, the length and height of the feeding part are set to be equal to the length and height of the cavity, so that after the preheating container completely enters the cavity, the cavity can be well sealed to prevent heat loss.

[0021] 4. Through the settings of the preheating container, the fourth oil cylinder, the elastic structure, the pressing plate, the feeding pipe, etc. in the present invention, the feeding and discharging of the preheating container are greatly facilitated, thereby improving the overall efficiency.

[0022] 5. The present invention sets the material receiving mechanism to be composed of a material receiving hopper, a first suction pipe, a material passing interlayer, a second suction pipe and a suction pump. When the preheating container pours plastic raw materials into the material receiving hopper, the suction pump starts to immediately suck the plastic raw materials poured into the material receiving hopper into the feeding hopper, which can minimize the heat loss during the pouring process and improve the efficiency at the same time. Among them, the plastic raw materials enter the feeding hopper after passing through the first suction pipe, the material passing interlayer and the second suction pipe in sequence. The material passing interlayer is arranged in the heat preservation layer. Since the heat preservation layer is wrapped outside the heating body, part of the heat will be accumulated in the heat preservation layer during the heating process of the heating body. On the one hand, it plays a good heat preservation role. On the other hand, when the plastic raw materials pass through the material passing interlayer in the heat preservation layer, it not only plays a good heat preservation role for the preheated plastic raw materials, but also reheats the plastic raw materials, further improving the preheating effect, making good use of the heat energy, and finally achieving the effect of energy saving.

[0023] 6. The present invention provides a mixing mechanism composed of a first airbag, a connecting pipe, a second airbag, etc. After adding plastic raw materials into the preheating container, the inlet and outlet driving mechanism is activated to send the preheating container filled with granular plastic raw materials into the cavity. At this time, the spring of the elastic structure is in a relaxed state or a slightly compressed state, but the connecting plate does not squeeze the first airbag. After preheating for a period of time, the inlet and outlet driving mechanism is activated to make the connecting plate continue to move to the right. During the process of the connecting plate moving to the right, it will squeeze the first airbag, and the gas in the first airbag will be squeezed into the second airbag. As the gas enters, the second airbag will expand, and the process of the second airbag expanding will squeeze the surrounding plastic raw materials. Then, the inlet and outlet driving mechanism will move in the reverse direction, so that the second airbag will shrink again. After repeating this process several times, the plastic raw materials in the preheating container are well mixed, thereby improving the uniformity of the mixing of the plastic raw materials and making the preheating effect better. In order to make the mixing effect of the plastic raw materials better, several airbag branches can be connected to the second airbag, which can make the mixing more comprehensive and improve the mixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the overall schematic diagram of the present invention.

[0025] Figure 2 is the schematic diagram of the injection mechanism, the mold clamping mechanism and part of the support base of the present invention.

[0026] Figure 3 is the schematic diagram of the injection mechanism, the mold clamping mechanism and part of the support base of the present invention.

[0027] Figure 4 is the schematic diagram of the mold clamping mechanism and part of the support base of the present invention.

[0028] Figure 5 is the schematic diagram of the injection mechanism of the present invention.

[0029] Figure 6 is the overall schematic diagram of the present invention.

[0030] Figure 7 is the schematic diagram of the preheating container of the present invention.

[0031] Figure 8 of the present invention Figure 2 is the schematic diagram after adding the fourth support plate, the fourth oil cylinder, the pressing plate, the feeding pipe, the material receiving mechanism, the mixing mechanism and the cooling mechanism.

[0032] Figure 9 of the present invention Figure 2 is the schematic diagram after adding the fourth support plate, the fourth oil cylinder, the pressing plate, the feeding pipe, the material receiving mechanism, the mixing mechanism and the cooling mechanism.

[0033] Figure 10Schematic diagram of the preheating container and the mixing mechanism of the present invention.

[0034] In the figure: 1 - support base, 2 - injection mechanism, 3 - mold clamping mechanism, 4 - first support plate, 5 - first mold, 6 - second mold, 7 - opening and closing drive mechanism, 8 - mold cavity, 9 - cavity, 10 - preheating container, 11 - elastic structure, 12 - connecting plate, 13 - in-out drive mechanism, 14 - second support plate, 15 - first oil cylinder, 16 - first moving plate, 17 - first connecting rod, 18 - second moving plate, 19 - second connecting rod, 20 - third support plate, 21 - stop block, 22 - connecting shaft, 23 - first fixing block, 24 - second fixing block, 25 - third fixing block, 26 - ejector pin, 27 - first spring, 28 - motor, 29 - screw, 30 - extrusion head, 31 - barrel, 32 - heating element, 33 - feed hopper, 34 - injection hole, 35 - injection passage, 36 - housing, 37 - second oil cylinder, 38 - third oil cylinder, 39 - feeding part, 40 - feeding port, 41 - discharging part, 42 - discharging port, 43 - fourth support plate, 44 - fourth oil cylinder, 45 - pressing plate, 46 - feeding pipe, 47 - material receiving mechanism, 48 - material receiving hopper, 49 - first suction pipe, 50 - material passing interlayer, 51 - second suction pipe, 52 - suction pump, 53 - heat insulation layer, 54 - mixing mechanism, 55 - first airbag, 56 - connecting pipe, 57 - second airbag, 58 - cooling mechanism. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the appended Figure 1-10 It is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] The present invention provides a technical solution: an energy-efficient injection molding machine, which includes a support base 1. An injection mechanism 2 and a mold clamping mechanism 3 are connected to the support base 1. The mold clamping mechanism 3 includes a first support plate 4 fixed on the support base 1. A first mold 5 is fixed on the left side surface of the first support plate 4. The first mold 5 is connected to a second mold 6 in an openable and closable manner. An opening and closing driving mechanism 7 is provided on the second mold 6. After the second mold 6 is clamped with the first mold 5, a mold cavity 8 is formed. A cavity 9 is formed on the second mold 6. A preheating container 10 that can enter and exit the cavity 9 is provided in the cavity 9. The preheating container 10 is connected to a connecting plate 12 through an elastic structure 11. The connecting plate 12 is connected to an inlet and outlet driving mechanism 13. During operation, first, the inlet and outlet driving mechanism 13 is started to pull the preheating container 10 out of the cavity 9. Then, un-preheated granular plastic raw materials are added into the preheating container 10. After that, the inlet and outlet driving mechanism 13 is restarted to send the preheating container 10 filled with granular plastic raw materials back into the cavity 9. Then, the injection mechanism 2 injects the molten plastic raw materials into the mold cavity 8. Then, a certain period of pressure holding is carried out. This pressure holding process is also a process of heating the plastic raw materials in the preheating container 10. In this way, during the pressure holding process, the heat of the high-temperature molten plastic raw materials in the mold cavity 8 is fully utilized, the plastic raw materials in the preheating container 10 are preheated and dried to a certain extent, saving energy. When the pressure holding time is reached, the inlet and outlet driving mechanism 13 is started to pull the preheating container 10 out of the cavity 9. Then, only the preheated plastic raw materials in the preheating container 10 need to be transported to the injection mechanism 2 to participate in the injection molding. In this way, the granular plastic raw materials entering the injection mechanism 2 do not need to be preheated additionally, greatly saving energy. After the preheating container 10 is pulled out of the cavity 9, a large part of the second mold 6 will be missing. In this way, the second mold 6 can be quickly cooled, and at the same time, the heat dissipation effect is improved, and finally the cooling efficiency and effect are improved. After the plastic raw materials in the mold cavity 8 are fully cooled and formed, the opening and closing driving mechanism 7 is started to separate the second mold 6 from the first mold 5. Then, the finished product in the mold cavity 8 can be taken out. After that, the opening and closing driving mechanism 7 is restarted to close the second mold 6 with the first mold 5. Then, un-preheated granular plastic raw materials are added into the preheating container 10 to carry out the next round of injection molding process, and so on in a cycle.

[0037] The opening and closing drive mechanism 7 includes a second support plate 14 fixed on the support base 1. A first oil cylinder 15 is fixedly penetrated through the second support plate 14. The end of the piston rod of the first oil cylinder 15 is fixed with a first moving plate 16. The first moving plate 16 is connected with a second moving plate 18 through a plurality of first connecting rods 17. The second moving plate 18 is connected with the second mold 6 through a plurality of second connecting rods 19. This is the specific structure of the opening and closing drive mechanism 7. When it is necessary to separate the second mold 6 from the first mold 5, the first oil cylinder 15 is started, and its piston rod contracts, thereby causing the first moving plate 16 to move towards the first oil cylinder 15, further driving the second moving plate 18 to move towards the first oil cylinder 15, further driving the second mold 6 to move towards the first oil cylinder 15, and ultimately separating the second mold 6 from the first mold 5. When it is necessary to close the second mold 6 with the first mold 5, the piston rod of the first oil cylinder 15 only needs to move in the reverse direction. The second connecting rod 19 is fixedly connected with the second mold 6. The second connecting rod 19 penetrates through the first mold 5 and the first support plate 4 and is movably connected with the first mold 5 and the first support plate 4. This setting plays a good guiding role, enabling the first mold 5 and the second mold 6 to perform accurate mold closing. Four first connecting rods 17 are provided, which are respectively connected to four pairs of opposite corners of the first moving plate 16 and the second moving plate 18. Four second connecting rods 19 are provided and penetrate through four corners of the second mold 6 and the first mold 5.

[0038] The bottoms of the first moving plate 16 and the second moving plate 18 are both slidably connected to the support base 1. A third support plate 20 is provided between the first moving plate 16 and the second moving plate 18. The third support plate 20 is fixed to the support base 1, and the first connecting rod 17 passes through the third support plate 20. A stop block 21 is fixed on the third support plate 20. A connecting shaft 22 opposite to the stop block 21 is passed through the second moving plate 18. A first fixing block 23 is fixed to the right end of the connecting shaft 22. A second fixing block 24 is fixed to the first fixing block 23. A third fixing block 25 opposite to the second fixing block 24 is fixed to the second mold 6. A thimble 26 is fixed to the second fixing block 24. The thimble 26 sequentially passes through the first spring 27, the third fixing block 25 and the second mold 6. The left end of the first spring 27 is fixed to the second fixing block 24, and its right end is fixed to the third fixing block 25. Since the finished product after the plastic raw material is formed in the mold cavity 8 often adheres to the mold cavity 8, it is often time-consuming and laborious to take out the finished product in the mold cavity 8. Therefore, this setting facilitates the taking out of the finished product in the mold cavity 8. The specific process is as follows: After the plastic raw material in the mold cavity 8 is fully cooled and formed, the opening and closing driving mechanism 7 is started to separate the second mold 6 from the first mold 5. During the process of the second mold 6 moving away from the first mold 5, when the connecting shaft 22 touches the stop block 21, the first fixing block 23 will be pushed to the right, and then the thimble 26 will be pushed to the right, and then the finished product in the mold cavity 8 will be pushed out, greatly improving the efficiency of taking out the finished product in the mold cavity 8. The inlet and outlet driving mechanism 13 is arranged at the central position of the second moving plate 18. A through hole through which the inlet and outlet driving mechanism 13 can pass is provided on the third support plate 20, so as to avoid the situation that the third support plate 20 blocks the inlet and outlet driving mechanism 13 and affects the overall injection molding process. Two groups of the connecting shaft 22 and the stop block 21 are arranged above and below the inlet and outlet driving mechanism 13, so that the effect of pushing out the finished product in the mold cavity 8 is better.

[0039] The injection mechanism 2 includes a motor 28 slidably connected to the support base 1. A screw rod 29 is connected to the output shaft of the motor 28. A pressing head 30 is fixed to the left end of the screw rod 29. The screw rod 29 is arranged inside a barrel 31. A heating element 32 is fixed to the outer wall of the barrel 31. A feed hopper 33 is communicated near the right end of the barrel 31. The left end of the barrel 31 is fixed to the first support plate 4, and an injection hole 34 is opened at the left end of the barrel 31. An injection passage 35 communicated with the injection hole 34 is opened on the first mold 5. The left end of the injection passage 35 is communicated with a mold cavity 8. The motor 28 is fixed to a housing 36. The housing 36 is slidably connected to the support base 1. A second oil cylinder 37 is fixed to the housing 36. The end of the piston rod of the second oil cylinder 37 is fixed to the first support plate 4. This is the specific structure of the injection mechanism 2. When it is necessary to heat the granular plastic raw material to a molten plastic raw material and inject it into the mold cavity 8, first add the granular plastic raw material into the feed hopper 33. Then the motor 28 is started to drive the screw rod 29 to rotate, thereby transporting and stirring the granular plastic raw material. At the same time, the granular plastic raw material in the barrel 31 is heated to a molten state by the heating element 32 outside the barrel 31. Then the second oil cylinder 37 is started, and its piston rod contracts, thereby driving the motor 28 to slide leftward, further driving the screw rod 29 to move leftward, and further driving the pressing head 30 to quickly extrude and inject the molten plastic raw material in the space between the pressing head 30 and the left end of the barrel 31 into the mold cavity 8. Among them, the molten plastic raw material enters the mold cavity 8 through the injection hole 34 and the injection passage 35 in sequence. Among them, two sets of second oil cylinders 37 are symmetrically arranged up and down on the housing 36.

[0040] The in-out driving mechanism 13 includes a third oil cylinder 38 fixedly arranged through the second moving plate 18. The end of the piston rod of the third oil cylinder 38 is fixed with a connecting plate 12. This is the specific structure of the in-out driving mechanism 13, and it is specifically driven by the third oil cylinder 38.

[0041] The preheating container 10 includes a feed portion 39 that matches the length and height of the cavity 9. A feed port 40 is provided on the top of the feed portion 39. The feed portion 39 is connected to a discharge portion 41. The top surface of the discharge portion 41 is lower than the top surface of the feed portion 39. The bottom surface of the discharge portion 41 is arranged to be inclined upward from left to right, and the right side thereof is arranged to be a discharge port 42. A fourth support plate 43 is fixed to the upper part of the first support plate 4. A fourth oil cylinder 44 is fixed to the fourth support plate 43. A pressing plate 45 is fixed to the end of the piston rod of the fourth oil cylinder 44, and a feed pipe 46 is fixed to the left side of the piston rod of the fourth oil cylinder 44. A material receiving mechanism 47 is provided on the support seat 1, wherein the top surface of the discharge portion 41 is arranged to be lower than the top surface of the feed portion 39, and the bottom surface of the discharge portion 41 is arranged to be inclined upward from left to right. In this way, the preheating container 10 forms a shape with a larger left end and a smaller right end, which greatly facilitates the entry of the preheating container 10 into the cavity 9. The bottom surface of the discharge portion 41 is set to be inclined upward from left to right, so that it is convenient to pour the plastic raw materials in the preheating container 10 out. The discharge portion 41 is also the place where the pressing plate 45 presses down the preheating container 10. The length and height of the feed portion 39 are set to be equal to the length and height of the cavity 9, so that after the preheating container 10 completely enters the cavity 9, the cavity 9 can be well blocked to prevent heat loss. When it is necessary to add granular plastic raw materials into the preheating container 10, first the in-and-out drive mechanism 13 is started to pull the preheating container 10 out of the cavity 9. At this time, the pressing plate 45 is aligned with the discharge portion 41 of the preheating container 10, and the feed pipe 46 is aligned with the feed port 40. Then the fourth oil cylinder 44 is started to drive the feed pipe 46 downward to the feed port 40. Then the feed pipe 46 passes the feed port 40 into the preheating container 10 to pass the granular plastic raw materials. After the addition is completed, the fourth oil cylinder 44 is restarted to send the feed pipe 46 to its original position. At the same time, the in-and-out drive mechanism 13 is restarted to send the preheating container 10 filled with the granular plastic raw materials back into the cavity 9. When the granular plastic raw materials in the preheating container 10 are preheated, they are pulled out of the cavity 9 by the in-and-out drive mechanism 13. After it is out of the cavity 9, the fourth oil cylinder 44 is started, and its piston rod is extended, driving the pressure plate 45 and the feed pipe 46 downward, wherein the feed pipe 46 just extends into the feed port 40, and the pressure plate 45 continues to press down after it abuts against the top of the discharge part 41 during the downward process, until the discharge port 42 of the discharge part 41 tilts to the lower right and pours the plastic raw materials in the preheating container 10 into the receiving mechanism 47, and then the piston rod of the fourth oil cylinder 44 contracts until the preheating container 10 is in a horizontal state, and then the feed pipe 46 passes the next batch of granular plastic raw materials that need to be preheated into the preheating container 10, and then the piston rod of the fourth oil cylinder 44 continues to contract until it returns to its original position. This arrangement greatly facilitates the feeding and discharging of the preheating container 10, thereby improving the overall efficiency.Among them, the elastic structure 11 can be composed of several springs fixed at the middle position of the left side plate of the preheating container 10. Under normal conditions, the several springs connect the preheating container 10 to keep the preheating container 10 in a horizontal state. When the preheating container 10 is pressed down by the pressing plate 45, the springs will deform, causing the preheating container 10 to tilt and pour out the preheated plastic particles inside. Parameters such as the elastic force and thickness of the springs, as well as the magnitude and direction of the force exerted by the pressing plate 45 on the preheating container 10, are set according to actual needs to achieve the desired purpose and effect. The feed pipe 46 is connected to a granular plastic raw material storage barrel, and the plastic raw material is quantitatively extracted into the preheating container 10 through a pumping pump.

[0042] The material receiving mechanism 47 includes a receiving hopper 48 arranged below the preheating container 10. The bottom of the receiving hopper 48 is communicated with a first suction pipe 49. The first suction pipe 49 is communicated with a material passing interlayer 50. The material passing interlayer 50 is communicated with a second suction pipe 51. The second suction pipe 51 is communicated with a feed hopper 33. A suction pump 52 is provided on the second suction pipe 51. The material passing interlayer 50 is arranged in a heat preservation layer 53. The heat preservation layer 53 is wrapped outside the heating body 32 and is fixed to the barrel 31. When the preheating container 10 pours plastic raw materials into the receiving hopper 48, the suction pump 52 is started to immediately suck the plastic raw materials poured into the receiving hopper 48 into the feed hopper 33. This can minimize the heat loss during the pouring process and improve the efficiency at the same time. The plastic raw materials enter the feed hopper 33 after passing through the first suction pipe 49, the material passing interlayer 50, and the second suction pipe 51 in sequence. The material passing interlayer 50 is arranged in the heat preservation layer 53. Since the heat preservation layer 53 is wrapped outside the heating body 32, part of the heat generated during the heating process of the heating body 32 will be accumulated in the heat preservation layer 53. On the one hand, it plays a good heat preservation role. On the other hand, when the plastic raw materials pass through the material passing interlayer 50 in the heat preservation layer 53, it not only plays a good heat preservation role for the preheated plastic raw materials, but also reheats the plastic raw materials, further improving the preheating effect, making good use of the heat energy, and finally achieving the energy-saving effect.

[0043] On the left side wall of the preheating container 10, there are two sets of mixing mechanisms 54 arranged vertically and horizontally. The mixing mechanism 54 includes a first airbag 55 fixed on the left side wall of the preheating container 10. The first airbag 55 is communicated with a connecting pipe 56. The connecting pipe 56 penetrates through the preheating container 10 and extends into the interior of the preheating container 10. The inner end of the connecting pipe 56 is communicated with a second airbag 57. The second airbag 57 is fixed on the inner wall of the preheating container 10. Through the setting of the mixing mechanism 54, during the preheating process of the preheating container 10, a good mixing effect is achieved on the plastic raw materials therein, making the plastic raw materials therein preheated more evenly and fully. Among them, the elastic structure 11 is composed of several springs fixed at the middle position of the left side plate of the preheating container 10. The specific working process is as follows: After the plastic raw materials are added to the preheating container 10, the inlet and outlet driving mechanism 13 is started, and the preheating container 10 filled with granular plastic raw materials is sent into the cavity 9. At this time, the springs of the elastic structure are in a relaxed state or a slightly compressed state, but the connecting plate 12 does not squeeze the first airbag 55. After preheating for a period of time, the inlet and outlet driving mechanism 13 is started, so that the connecting plate 12 continues to move to the right. During the process of the connecting plate 12 moving to the right, it will squeeze the first airbag 55, and the gas in the first airbag 55 will be squeezed into the second airbag 57. As the gas enters, the second airbag 57 will become larger, and the process of the second airbag 57 becoming larger will squeeze the plastic raw materials around it. Then the inlet and outlet driving mechanism 13 will move in the reverse direction, so that the second airbag 57 will shrink again. After repeating this several times, the plastic raw materials in the preheating container 10 are well mixed, thereby improving the uniformity of the mixing of the plastic raw materials and making the preheating effect better. In order to make the mixing effect of the plastic raw materials better, several airbag branches can be communicated with the second airbag 57, so that the mixing can be more comprehensive and the mixing effect can be improved.

[0044] The first mold 5 and the second mold 6 are provided with a cooling mechanism 58. Among them, the cooling mechanism 58 is a water cooling mechanism. Cooling pipes are provided at positions close to the mold cavity 8 in the first mold 5 and the second mold 6. Both ends of the cooling pipes are communicated with a cooling box. The first mold 5 and the second mold 6 are cooled by the circulation of cooling water. Through the setting of the cooling mechanism 58, the cooling of the first mold 5 and the second mold 6 can be accelerated after the pressure holding is completed.

[0045] Working principle: During operation, first, the in-out driving mechanism 13 is activated to pull the preheating container 10 out of the cavity 9. Then, granular plastic raw materials that have not been preheated are added into the preheating container 10. After that, the in-out driving mechanism 13 is restarted to send the preheating container 10 filled with granular plastic raw materials back into the cavity 9. Next, the injection mechanism 2 injects the molten plastic raw materials into the mold cavity 8. Then, a certain period of pressure holding is carried out. This pressure holding process is also a process of heating the plastic raw materials in the preheating container 10. In this way, during the pressure holding process, the heat of the high-temperature molten plastic raw materials in the mold cavity 8 is fully utilized to preheat and dry the plastic raw materials in the preheating container 10 to a certain extent, saving energy. When the pressure holding time is reached, the in-out driving mechanism 13 is activated to pull the preheating container 10 out of the cavity 9. Then, only the preheated plastic raw materials in the preheating container 10 need to be transferred to the injection mechanism 2 to participate in injection molding. In this way, the granular plastic raw materials entering the injection mechanism 2 do not need to be preheated additionally, greatly saving energy. After the preheating container 10 is pulled out of the cavity 9, a large part of the second mold 6 will be missing, so that the second mold 6 can be quickly cooled, and at the same time, the heat dissipation effect can be improved, ultimately improving the cooling efficiency and effect. After the plastic raw materials in the mold cavity 8 are fully cooled and formed, the opening-closing driving mechanism 7 is activated to separate the second mold 6 from the first mold 5. Then, the finished product in the mold cavity 8 can be taken out. After that, the opening-closing driving mechanism 7 is restarted to close the second mold 6 and the first mold 5. Then, granular plastic raw materials that have not been preheated are added into the preheating container 10 to carry out the next round of injection molding process, and so on in a cycle.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency energy-saving injection molding machine, characterized in that: The invention comprises a support base (1), the support base (1) is connected to an injection mechanism (2) and a clamping mechanism (3), the clamping mechanism (3) comprises a first support plate (4) fixed to the support base (1), a first mould (5) is fixed to the left side of the first support plate (4), the first mould (5) is connected to a second mould (6) in an opening and closing manner, the second mould (6) is provided with an opening and closing driving mechanism (7), the second mould (6) forms a mould cavity (8) after the second mould (6) and the first mould (5) are combined, the second mould (6) is provided with a cavity (9), a preheating container (10) which can enter and exit the cavity (9), the preheating container (10) is connected to a connecting plate (12) via an elastic structure (11), and the connecting plate (12) is connected to an entry and exit driving mechanism (13).

2. The high-efficiency energy-saving injection molding machine according to claim 1, characterized in that: The opening and closing drive mechanism (7) comprises a second support plate (14) fixed on the support seat (1), a first oil cylinder (15) passing through and fixed on the second support plate (14), a first movable plate (16) being fixed to the end of the piston rod of the first oil cylinder (15), the first movable plate (16) being connected to a second movable plate (18) via a plurality of first connecting rods (17), and the second movable plate (18) being connected to the second mold (6) via a plurality of second connecting rods (19).

3. The high-efficiency energy-saving injection molding machine according to claim 2, characterized in that: The bottoms of the first movable plate (16) and the second movable plate (18) are both slidably connected to the support seat (1); a third support plate (20) is provided between the first movable plate (16) and the second movable plate (18); the third support plate (20) is fixed to the support seat (1); and the first connecting rod (17) passes through the third support plate (20); a stopper (21) is fixed to the third support plate (20); a connecting shaft (22) opposite to the stopper (21) is passed through the second movable plate (18); and the connecting shaft (22) is ) is fixed to the right end of the first spring (27), a second fixed block (24) is fixed on the first fixed block (23), a third fixed block (25) opposite to the second fixed block (24) is fixed on the second mould (6), an ejector pin (26) is fixed on the second fixed block (24), the ejector pin (26) passes through the first spring (27), the third fixed block (25) and the second mould (6) in sequence, the left end of the first spring (27) is fixed on the second fixed block (24), and the right end of the first spring (27) is fixed on the third fixed block (25).

4. The high-efficiency energy-saving injection molding machine according to claim 1, characterized in that: The injection mechanism (2) comprises a motor (28) slidably connected to the support seat (1), a screw (29) being connected to the output shaft of the motor (28), an extrusion head (30) being fixed to the left end of the screw (29), the screw (29) being arranged in a barrel (31), a heating body (32) being fixed to the outer wall of the barrel (31), a feed hopper (33) being connected to the right end of the barrel (31), the left end of the barrel (31) being fixed to the first support plate (4), an injection hole (34) being provided at the left end of the barrel (31), an injection passage (35) being connected to the injection hole (34) being provided on the first mold (5), and the left end of the injection passage (35) being connected to the mold cavity (8).

5. The high-efficiency energy-saving injection molding machine according to claim 4, characterized in that: The motor (28) is fixed on a cover shell (36), the cover shell (36) is slidably connected to the support seat (1), a second oil cylinder (37) is fixed on the cover shell (36), and the end of the piston rod of the second oil cylinder (37) is fixed on the first support plate (4).

6. The high-efficiency energy-saving injection molding machine according to claim 2, characterized in that: The in-and-out drive mechanism (13) comprises a third oil cylinder (38) penetrating and fixed on the second movable plate (18), and the connecting plate (12) is fixed to the end of the piston rod of the third oil cylinder (38).

7. A high-efficiency energy-saving injection molding machine according to claim 1 or 4, characterized in that: The preheating container (10) comprises a feed portion (39) matching the length and height of the cavity (9), a feed port (40) being provided at the top of the feed portion (39), a discharge portion (41) being connected to the feed portion (39), a top surface of the discharge portion (41) being lower than the top surface of the feed portion (39), a bottom surface of the discharge portion (41) being arranged to be inclined upward from left to right, and a discharge port (42) being arranged on the right side thereof, a fourth support plate (43) being fixed on the upper part of the first support plate (4), a fourth oil cylinder (44) being fixed on the fourth support plate (43), a pressure plate (45) being fixed on the end of the piston rod of the fourth oil cylinder (44), and a feed pipe (46) being fixed on the left side of the piston rod of the fourth oil cylinder (44), and a material receiving mechanism (47) being provided on the support seat (1).

8. The high-efficiency energy-saving injection molding machine according to claim 7, characterized in that: The material receiving mechanism (47) comprises a material receiving hopper (48) arranged below the preheating container (10); the bottom of the material receiving hopper (48) is connected to a first material suction pipe (49); the first material suction pipe (49) is connected to a material passing interlayer (50); the material passing interlayer (50) is connected to a second material suction pipe (51); the second material suction pipe (51) is connected to the feed hopper (33); a material suction pump (52) is provided on the second material suction pipe (51); the material passing interlayer (50) is arranged in a heat-insulating layer (53); the heat-insulating layer (53) is wrapped around the outside of the heating body (32); and the heat-insulating layer (53) is fixed to the barrel (31).

9. The high-efficiency energy-saving injection molding machine according to claim 1, characterized in that: An upper and lower set of mixing mechanisms (54) are provided on the left side wall of the preheating container (10). The mixing mechanism (54) comprises a first air bag (55) fixed on the left side wall of the preheating container (10). The first air bag (55) is connected to a connecting pipe (56). The connecting pipe (56) penetrates the preheating container (10) and extends into the interior of the preheating container (10). The inner end of the connecting pipe (10) is connected to a second air bag (57). The second air bag (57) is fixed on the inner wall of the preheating container (10).

10. The high-efficiency energy-saving injection molding machine according to claim 1, characterized in that: The first mold (5) and the second mold (6) are provided with a cooling mechanism (58).

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