PET (Polyethylene Terephthalate) sheet injection molding equipment

Abstract

The invention discloses PET sheet injection molding equipment which comprises a raw material tank and a melt injection box, a feeding pipe is arranged at the bottom of the raw material tank, a melt injection cylinder is arranged in the melt injection box, an injection screw is arranged in the melt injection cylinder, a feeding port is formed in the top of one end of the melt injection cylinder and connected with the feeding pipe, and an injection screw is arranged in the injection screw. A servo motor is arranged at one end of the melt injection box, the output end of the servo motor is connected with the injection screw through a coupler, a storage bin is arranged in the melt injection box below the melt injection cylinder, a discharge port communicated with the storage bin is formed in the bottom of one end of the melt injection cylinder, and a filter screen is arranged in the discharge port. By arranging a series of structures, PET sheet injection molding and discharging are fast, the discharging operable space is large, the integrated design of automatic mold closing and molding of PET sheet injection, discharging and sheet collection, shielding and wiping protection of the lower mold plate and the injection opening, injection melting filtration and uniform product materials are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of PET sheet injection molding, and specifically to a PET sheet injection molding device. Background Art

[0002] PET sheet injection molding is a precision process that uses injection technology to process PET raw materials into specific sheet products through a mold. This technology realizes the batch processing and production of PET sheets through steps such as high-temperature melting, high-pressure injection, and rapid cooling and shaping.

[0003] Currently, PET sheet injection molding raw material particles are heated and melted in an injection barrel and then injected into the mold. There are residual particles in the injection barrel heating and melting raw materials participating in the injection molding, which affects the uniformity of the sheet molding material. Moreover, the molten raw materials are stored independently, resulting in high energy consumption for maintaining the temperature of the molten raw materials. The mold opening space of the injection molding mold is small, and the sheet needs to be ejected and removed, making the operation of discharging, collecting, storing, and placing the PET sheet injection molding inconvenient. After the mold is opened, the injection port is exposed and vulnerable to influence, such as dust entering the injection port. The dust participates in the sheet molding with the next injection, affecting the quality of the sheet product. Summary of the Invention

[0004] The purpose of the present invention is to provide a PET sheet injection molding device to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A PET sheet injection molding device includes a raw material tank and a melting and injection tank. The bottom of the raw material tank is provided with a feed pipe. Inside the melting and injection tank, there is a melting and injection barrel. Inside the melting and injection barrel, there is an injection screw. At the top of one end of the melting and injection barrel, there is a feed port, which is connected to the feed pipe. One end of the melting and injection tank is provided with a servo motor, and the output end of the servo motor is connected to the injection screw through a coupling. Inside the melting and injection tank below the melting and injection barrel, there is a storage bin. At the bottom of one end of the melting and injection barrel, there is a discharge port communicating with the storage bin. Inside the discharge port, there is a filter screen. On the injection screw, there is a clogging clearing mechanism. Inside the melting and injection tank, there is a melting mechanism. At the bottom of the melting and injection tank, there is a second vertical frame. On one side of the second vertical frame, there is an upper fixed mold base through a mounting plate. At the bottom of the upper fixed mold base, there are an upper template and an injection port. The bottom of the storage bin is connected to the injection port through a backflow prevention injection pipe, and a control pump is provided on the backflow prevention injection pipe. On one side of the second vertical frame, there is a corner cylinder. At the top of the corner cylinder, there is a lower moving mold base through a connecting plate. On the top of the lower moving mold base on one side of the lower mold core, there is an upper mold protection mechanism. On one side of the corner cylinder, there is a sheet collection mechanism. On the lower moving mold base, there is a discharge mechanism. At the top of the lower moving mold base, there is a lower mold core.

[0006] Preferably, the melting mechanism includes a heating layer, electric heating wires, and a heat-insulating layer. A heating layer is provided in the melting injection box outside the melting injection cylinder. Electric heating wires are arranged inside the heating layer and are spirally wound around the outer surface of the melting injection cylinder. A heat-insulating layer is provided in the melting injection box on the side of the heating layer away from the melting injection cylinder, and the heat-insulating layer wraps the outer surface of the storage bin.

[0007] Preferably, the discharging mechanism includes a cooling mechanism, an ejector rod, and an ejection mechanism. A cooling mechanism is provided in the lower moving die base below the lower die core. An ejection mechanism is provided in the middle of the lower moving die base below the lower die core. An ejector rod is arranged on the ejection mechanism. An ejection hole is provided in the middle of the bottom of the lower die core. The ejector rod is arranged inside the lower die core through a sealing seat and the ejection hole, and the height of the ejector rod ejection is the same as the height of the top of the lower moving die base.

[0008] Preferably, the sheet collecting mechanism includes a collecting box, a support rod, a material collecting scraper, and a side baffle. A collecting box is provided on one side of the corner cylinder. A support rod is provided at the top of the side of the collecting box away from the corner cylinder. A material collecting scraper is provided at the top of the support rod. A side baffle is provided at one end of the material collecting scraper away from the support rod. The heights of the bottoms of the material collecting scraper and the side baffle are the same as the discharging height of the lower moving die base.

[0009] Preferably, the upper die protection mechanism includes an upper die protection baffle and a support frame. A support frame is provided at the top of the lower moving die base on one side of the lower die core. An upper die protection baffle is provided at the top of the support frame, and the upper die protection baffle is arranged at the bottom of the upper template.

[0010] Preferably, the cleaning mechanism includes a connecting rod, a cleaning plate, and a cleaning brush. A cleaning plate is arranged on the injection screw above the discharge port through the connecting rod. A cleaning brush is provided on the side of the cleaning plate away from the connecting rod, and the side of the cleaning brush away from the cleaning plate is arranged corresponding to the filtering surface of the filter screen.

[0011] Preferably, the cooling mechanism includes a water cooling box, a water cooling interlayer, and a connecting pipe. A water cooling box is provided in the lower moving die base on one side of the lower die core. A water cooling interlayer is provided in the lower moving die base below the lower die core. The water cooling interlayer is connected to the water cooling box through a connecting pipe and a return pipe, and a circulation pump is provided on the connecting pipe.

[0012] Preferably, a locking bolt is provided on the side of the lower moving die base away from the support frame, and the lower die core is fixedly installed on the lower moving die base through the locking bolt.

[0013] Preferably, the melting injection cylinder is arranged in a conical cylinder structure. A feed valve is provided on the feed pipe. A vibrating screen is provided inside the raw material tank, and a first vertical frame is provided on one side of the raw material tank.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This PET sheet injection molding equipment realizes the injection molding of PET sheets through the molten injection cylinder and injection pipe provided, in cooperation with the upper fixed mold base, upper template, injection port, lower moving mold base and lower mold core. The corner cylinder provided at the bottom of the lower moving mold base realizes the integrated design of the rotation and lifting and closing of the lower moving mold base. Combined with the cooling mechanism, ejection mechanism and ejection rod provided on the lower moving mold base, the injection molding and discharging of PET sheets are fast, and the operating space for discharging is large.

[0015] 2. This PET sheet injection molding equipment realizes the integrated design of automatic mold closing, discharging and sheet collection of PET sheets through the discharging scraper and side baffle provided on the lower moving mold base, in cooperation with the corner cylinder, collection box and discharging. The lower moving mold base rotates past the discharging scraper and side baffle.

[0016] 3. This PET sheet injection molding equipment realizes the shielding and wiping protection of the lower template and injection port through the upper mold protection baffle provided on the lower moving mold base, and the upper mold protection baffle rises and falls and rotates synchronously with the lower moving mold base.

[0017] 4. This PET sheet injection molding equipment realizes the melting and storage of PET sheet injection through the storage bin provided below the molten injection cylinder, making the molten injection of PET sheets sufficient. The storage bin can be insulated using the molten heat of the molten injection cylinder, with good energy conservation and a compact structure; a filter screen is provided at the discharge port, in cooperation with the cleaning plate and cleaning brush, and the injection melting is filtered without particles, making the material of the PET sheet injection molding product uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram of the molten injection box in the present invention; Figure 3 is the enlarged structural schematic diagram at A in the present invention 2; Figure 4 is the structural schematic diagram of the lower moving mold base in the present invention; Figure 5 is the structural schematic diagram of the lower mold core in the present invention; Figure 6 is the structural schematic diagram of the material receiving scraper in the present invention.

[0019] In the figure: 1, raw material tank; 2, melting injection box; 21, melting injection cylinder; 22, injection screw; 23, servo motor; 24, heating layer; 25, electric heating wire; 26, heat preservation layer; 27, feed inlet; 28, discharge outlet; 29, filter screen; 210, connecting rod; 211, cleaning plate; 212, cleaning brush; 3, storage bin; 4, upper fixed mold base; 41, upper template; 42, injection port; 5, lower moving mold base; 51, lower mold core; 52, ejector rod; 53, ejecting mechanism; 54, water cooling box; 55, water cooling interlayer; 56, connecting pipe; 57, locking bolt; 6, corner cylinder; 7, collection box; 71, support rod; 72, material receiving scraping plate; 73, side baffle; 8, upper mold protection baffle; 81, support frame; 9, anti-backflow injection pipe; 91, control pump; 10, first vertical frame; 11, second vertical frame; 12, feed pipe; 13, mounting plate. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all 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.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] Such as Figures 1 to 6As shown in the figure, the PET sheet injection molding equipment of this embodiment includes a raw material tank 1 and a melting injection tank 2. The bottom of the raw material tank 1 is provided with a feed pipe 12. Inside the melting injection tank 2, there is a melting injection cylinder 21. Inside the melting injection cylinder 21, there is an injection screw 22. At the top of one end of the melting injection cylinder 21, there is a feed port 27, and the feed port 27 is connected to the feed pipe 12. One end of the melting injection tank 2 is provided with a servo motor 23, and the output end of the servo motor 23 is connected to the injection screw 22 through a coupling. Inside the melting injection tank 2 below the melting injection cylinder 21, there is a storage bin 3. At the bottom of one end of the melting injection cylinder 21, there is a discharge port 28 communicating with the storage bin 3. Inside the discharge port 28, there is a filter screen 29. On the injection screw 22, there is a clogging clearing mechanism. Inside the melting injection tank 2, there is a melting mechanism. At the bottom of the melting injection tank 2, there is a second vertical frame 11. On one side of the second vertical frame 11, there is an upper fixed mold base 4 through a mounting plate 13. At the bottom of the upper fixed mold base 4, there are an upper template 41 and an injection port 42. The bottom of the storage bin 3 is connected to the injection port 42 through a backflow prevention injection pipe 9. The backflow prevention injection pipe 9 adopts a Tesla valve, and the backflow prevention injection pipe 9 plays a role in injection and backflow prevention. On the backflow prevention injection pipe 9, there is a control pump 91. The control pump 91 controls the injection of the molten raw material in the storage bin 3 through the backflow prevention injection pipe 9 from the injection port 42 into the closed lower mold core 51. On one side of the second vertical frame 11, there is a corner cylinder 6. At the top of the corner cylinder 6, there is a lower moving mold base 5 through a connecting plate. On the top of the lower moving mold base 5 on one side of the lower mold core 51, there is an upper mold protection mechanism. On one side of the corner cylinder 6, there is a sheet collecting mechanism. On the lower moving mold base 5, there is a discharging mechanism. At the top of the lower moving mold base 5, there is a lower mold core 51. The corner cylinder 6 adopts an existing design of a 90° corner cylinder that first moves straight down and then rotates. The corner cylinder 6 rotates back and then moves straight up. That is, under the action of the corner cylinder 6, the lower moving mold base 5 can first move straight down and then rotate to the upper part of the sheet collecting mechanism at the bottom of the upper fixed mold base 4. After the lower moving mold base 5 rotates back and then moves straight up to be clamped with the upper fixed mold base 4 to form a PET sheet injection molding die. The PET sheet injection molding and discharging are fast, and the discharging operation space is large. It realizes the integrated design of automatic clamping and molding, discharging, sheet collecting, and injection port protection for PET sheet injection. The injection is melted and filtered, and the product material is uniform.

[0023] Specifically, the melting mechanism includes a heating layer 24, an electric heating wire 25, and a heat preservation layer 26. The heating layer 24 is provided inside the melting injection box 2 outside the melting injection cylinder 21. The electric heating wire 25 is provided inside the heating layer 24 and is spirally wound around the outer surface of the melting injection cylinder 21. The heat preservation layer 26 is provided inside the melting injection box 2 on the side away from the melting injection cylinder 21, and the heat preservation layer 26 wraps the outer surface of the storage bin 3. The melting injection box 2 is made of stainless steel, and the outside of the melting injection box 2 is wrapped with a heat insulation layer, the material of the heat insulation layer is ceramic fiber, and the material of the heat preservation layer 26 is glass wool. The electric heating wire 25 in the heating layer 24 is energized to heat, and the raw material particles in the melting injection cylinder 21 are heated at high temperature for melting. The heat preservation layer 26 can keep the heating layer 24 and the storage bin 3 warm and reduce heat loss.

[0024] Further, the discharging mechanism includes a cooling mechanism, an ejector rod 52, and an ejection mechanism 53. The cooling mechanism is provided inside the lower moving die base 5 below the lower die core 51. The ejection mechanism 53 is provided in the middle of the lower moving die base 5 below the lower die core 51. The ejector rod 52 is provided on the ejection mechanism 53. An ejection hole is provided in the middle of the bottom of the lower die core 51. The ejector rod 52 is arranged inside the lower die core 53 through a sealing seat and the ejection hole. The height of the ejector rod 52 ejected is the same as the height of the top of the lower moving die base 5, that is, the sheet is ejected, and the top of the ejector rod 52 and the top of the lower moving die base 5 are on the same horizontal plane, so that the ejected sheet can be collected by the sheet collecting mechanism. The cooling mechanism cools and forms the injection raw material in the lower die core 51. The ejection mechanism 53 is combined with the existing die ejection. The ejection mechanism 53 can be composed of a forward and reverse motor, a threaded rod, a limiting cylinder, and a threaded seat. The lower end of the ejector rod 52 is of a hollow structure, and the bottom of the ejector rod 52 is connected to the threaded seat. A limiting cylinder is provided inside the lower moving die base 5 below the lower die core 51. A threaded seat and a threaded rod are provided inside the limiting cylinder. The threaded seat is connected to the threaded rod. A limiting rod is provided on one side inside the limiting cylinder. The threaded seat is slidably arranged on the limiting rod. The bottom of the threaded rod is connected to the output end of the forward and reverse motor through a coupling. The ejector rod 52 is driven to lift and lower by the ejection mechanism 53 for ejecting the formed sheet in the lower die core 51.

[0025] Further, the sheet collecting mechanism includes a collecting box 7, a support rod 71, a material collecting scraper 72 and a side baffle 73. A collecting box 7 is provided on one side of the corner cylinder 6. A support rod 71 is provided at the top of the side of the collecting box 7 away from the corner cylinder 6. A material collecting scraper 72 is provided at the top of the support rod 71. A side baffle 73 is provided at one end of the material collecting scraper 72 away from the support rod 71. The heights of the bottoms of the material collecting scraper 72 and the side baffle 73 are the same as the discharging height of the lower moving die base 5. The lower moving die base 5 descends linearly and then rotates above the collecting box 7. Then the sheet is ejected and discharged in the lower die core 51. After the ejection and discharge, the lower moving die base 5 rotates below the upper fixed die base 4. During the low-position rotation of the lower moving die base 5, the lower die core 51 passes through the material collecting scraper 72 and the side baffle 73 twice. When the lower die core 51 first passes through the material collecting scraper 72 and the side baffle 73, the sheet in the lower die core 51 is not ejected. After the lower die core 51 first passes through the material collecting scraper 72 and the side baffle 73, the sheet is ejected in the lower die core 51. When the lower die core 51 second passes through the material collecting scraper 72 and the side baffle 73, the ejected sheet is scraped into the collecting box 7 by the material collecting scraper 72 and the side baffle 73 for collection and storage.

[0026] Further, the upper die protection mechanism includes an upper die protection baffle 8 and a support frame 81. A support frame 81 is provided at the top of the lower moving die base 5 on one side of the lower die core 51. An upper die protection baffle 8 is provided at the top of the support frame 81. The upper die protection baffle 8 is provided at the bottom of the upper template 41. The top of the upper die protection baffle 8 is provided as a wiping silica gel pad. The upper die protection baffle 8 can lift and rotate under the action of the rotating cylinder 6 along with the lower moving die base 5, that is, when the lower moving die base 5 moves down, it drives the upper die protection baffle 8 to move down to a low position. When the upper die protection baffle 8 is at the low position, its height corresponds to the bottom of the upper template 41. Then the upper die protection baffle 8 rotates to the low position to the bottom of the lower template 41. The wiping silica gel pad at the top of the upper die protection baffle 8 wipes and cleans the bottom of the lower template 41. The upper die protection baffle 8 rotates to shield and protect the bottoms of the upper template 41 and the injection port 42.

[0027] Further, the cleaning mechanism includes a connecting rod 210, a cleaning plate 211 and a cleaning brush 212. A cleaning plate 211 is provided on the injection screw 22 above the discharge port 28 through the connecting rod 210. A cleaning brush 212 is provided on one side of the cleaning plate 211 away from the connecting rod 210. The side of the cleaning brush 212 away from the cleaning plate 211 is correspondingly arranged with the filtering surface of the filter net 29. The injection screw 22 rotates to drive the cleaning plate 211 and the cleaning brush 212 to rotate in the molten injection cylinder 21 through the connecting rod 210. The cleaning brush 212 rotates to clear the blockage of the filtering surface when passing through the filter net 29.

[0028] Further, the cooling mechanism includes a water cooling box 54, a water cooling sandwich layer 55 and a connecting pipe 56. A water cooling box 54 is arranged in the lower moving die base 5 on one side of the lower die core 51. A water cooling sandwich layer 55 is arranged in the lower moving die base 5 below the lower die core 51. The water cooling sandwich layer 55 is connected to the water cooling box 54 through the connecting pipe 56 and a return pipe. A circulation pump is arranged on the connecting pipe 56. The water cooling box 54 circulates and conveys cooling water to the water cooling sandwich layer 55 through the circulation pump and the connecting pipe 56 for the forming and cooling inside the lower die core 51, and the forming and cooling is rapid.

[0029] Further, a locking bolt 57 is arranged on one side of the lower moving die base 5 away from the support frame 81. The lower die core 51 is fixedly installed on the lower moving die base 5 through the locking bolt 57, and the lower die core 51 can be disassembled, assembled and replaced on the lower moving die base 5 through the locking bolt 57.

[0030] Furthermore, the molten injection cylinder 21 is arranged in a conical cylinder structure. The molten injection of the molten injection cylinder 21 is convenient, and the storage bin 3 has a large space. A feed valve is arranged on the feed pipe 12. A vibrating screen is arranged inside the raw material tank 1. The vibrating screen screens the raw material particles in the raw material tank 1. A first vertical frame 10 is arranged on one side of the raw material tank 1, and the raw material tank 1 is stably supported.

[0031] The usage method of this embodiment is as follows: The raw material particles for PET sheet injection molding are stored in the raw material tank 1. The feed valve on the feed pipe 12 is opened, and the raw material particles enter the interior of the melting injection cylinder 21 through the feed pipe 12 from the feed port 27. The electric heating wire 25 in the heating layer 24 heats the raw material particles in the melting injection cylinder 21 at a high temperature for melting. The servo motor 23 on the melting injection box 2 drives the injection screw 22 to rotate in the melting injection cylinder 21, and the raw material particles are melted and injected in the melting injection cylinder 21. The molten raw material in the melting injection cylinder 21 enters the storage bin 3 for storage after passing through the filter screen 29 at the discharge port 28 to filter out the unmolten particles. The heat insulation layer 26 insulates the heating layer 24 and the storage bin 3. The storage bin 3 is inside the melting injection box 2, and the high temperature of the environment of the melting injection cylinder 21 can be used for the heat insulation of the storage bin 3. The cleaning plate 211 and the cleaning brush 212 rotate with the injection screw 22 to clear the blockage of the filter surface through the filter screen 29. The corner cylinder 6 supports the lower moving die base 5 to close the mold at the bottom of the upper fixed die base 4 to form a mold for PET sheet injection molding. In the closed mold state, the control pump on the anti-backflow injection pipe 9 injects the molten raw material in the storage bin 3 into the lower mold core 51 through the injection port 42. The water cooling box 54 circulates and conveys cooling water to the water cooling sandwich layer 55 through the circulating pump and the connecting pipe 56 for cooling the molding in the lower mold core 51. The corner cylinder 6 linearly descends to drive the lower moving die base 5 to move downward, and the lower moving die base 5 separates from the upper fixed die base 4 to open the mold. After the lower moving die base 5 and the upper mold protection baffle 8 linearly move downward to the low position, the corner cylinder 6 drives the lower moving die base 5 and the upper mold protection baffle 8 to rotate at the low position. The upper mold protection baffle 8 rotates to the bottom of the upper template 41 and the injection port 42 to block, and the lower moving die base 5 rotates above the collection box 7. The ejection mechanism 53 drives the ejection rod 52 to move upward to eject the molded sheet in the lower mold core 51. The corner cylinder 6 resets and rotates and then linearly moves up and down. The lower mold core 51 of the lower moving die base 5 rotates past the material receiving scraper 72 and the side baffle 73, and the sheet ejected on the lower moving die base 5 is scraped into the collection box 7 for storage by the material receiving scraper 72 and the side baffle 73. The lower moving die base 5 linearly rises to close the mold with the upper fixed die base 4 for injection molding processing. By repeating the operation, batch injection molding production of PET sheets is carried out.

[0032] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, 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 PET sheet injection molding device, comprising a raw material tank (1) and a melting and injection tank (2), characterized in that: The bottom of the raw material tank (1) is provided with a feed pipe (12). Inside the melting and injection box (2), there is a melting and injection cylinder (21). Inside the melting and injection cylinder (21), there is an injection screw (22). At the top of one end of the melting and injection cylinder (21), there is a feed inlet (27), and the feed inlet (27) is connected to the feed pipe (12). One end of the melting and injection box (2) is provided with a servo motor (23), and the output end of the servo motor (23) is connected to the injection screw (22) through a coupling. Inside the melting and injection box (2) below the melting and injection cylinder (21), there is a storage bin (3). At the bottom of one end of the melting and injection cylinder (21), there is a discharge port (28) communicating with the storage bin (3). Inside the discharge port (28), there is a filter screen (29). On the injection screw (22), there is a clogging clearing mechanism. Inside the melting and injection box (2), there is a melting mechanism. At the bottom of the melting and injection box (2), there is a second vertical frame (11). On one side of the second vertical frame (11), there is an upper fixed mold base (4) through a mounting plate (13). At the bottom of the upper fixed mold base (4), there are an upper template (41) and an injection port (42). The bottom of the storage bin (3) is connected to the injection port (42) through a backflow prevention injection pipe (9). On the backflow prevention injection pipe (9), there is a control pump (91). On one side of the second vertical frame (11), there is a corner cylinder (6). At the top of the corner cylinder (6), there is a lower moving mold base (5) through a connecting plate. On the top of the lower moving mold base (5) on one side of the lower mold core (51), there is an upper mold protection mechanism. On one side of the corner cylinder (6), there is a sheet collecting mechanism. On the lower moving mold base (5), there is a discharging mechanism. On the top of the lower moving mold base (5), there is a lower mold core (51).

2. The PET sheet injection molding equipment according to claim 1, wherein: The melting mechanism includes a heating layer (24), electric heating wires (25), and a heat preservation layer (26). Inside the melting and injection box (2) outside the melting and injection cylinder (21), there is a heating layer (24). Inside the heating layer (24), there are electric heating wires (25). The electric heating wires (25) are spirally wound around the outer surface of the melting and injection cylinder (21). Inside the melting and injection box (2) on the side of the heating layer (24) away from the melting and injection cylinder (21), there is a heat preservation layer (26), and the heat preservation layer (26) wraps around the outer surface of the storage bin (3).

3. The PET sheet injection molding equipment according to claim 1, characterized in that: The discharging mechanism includes a cooling mechanism, an ejector rod (52), and an ejection mechanism (53). Inside the lower moving mold base (5) below the lower mold core (51), there is a cooling mechanism. In the middle of the lower moving mold base (5) below the lower mold core (51), there is an ejection mechanism (53). On the ejection mechanism (53), there is an ejector rod (52). In the middle of the bottom of the lower mold core (51), there is an ejection hole. The ejector rod (52) is arranged inside the lower mold core (53) through a sealing seat and the ejection hole. The height of the ejector rod (52) ejected is the same as the height of the top of the lower moving mold base (5).

4. The PET sheet injection molding device according to claim 1, characterized in that: The sheet collecting mechanism includes a collecting box (7), a support rod (71), a material collecting scraper (72) and a side baffle (73). A collecting box (7) is provided on one side of the corner cylinder (6). A support rod (71) is provided at the top of the side of the collecting box (7) away from the corner cylinder (6). A material collecting scraper (72) is provided at the top of the support rod (71). A side baffle (73) is provided at one end of the material collecting scraper (72) away from the support rod (71). The heights of the bottoms of the material collecting scraper (72) and the side baffle (73) are the same as the discharging height of the lower moving die base (5).

5. The PET sheet injection molding device according to claim 1, characterized in that: The upper die protection mechanism includes an upper die protection baffle (8) and a support frame (81). A support frame (81) is provided at the top of the lower moving die base (5) on one side of the lower die core (51). An upper die protection baffle (8) is provided at the top of the support frame (81). The upper die protection baffle (8) is provided at the bottom of the upper template (41).

6. The PET sheet injection molding device according to claim 1, characterized in that: The cleaning mechanism includes a connecting rod (210), a cleaning plate (211) and a cleaning brush (212). A cleaning plate (211) is provided on the injection screw (22) above the discharging port (28) through the connecting rod (210). A cleaning brush (212) is provided on one side of the cleaning plate (211) away from the connecting rod (210). The side of the cleaning brush (212) away from the cleaning plate (211) is correspondingly arranged with the filtering surface of the filter screen (29).

7. The PET sheet injection molding equipment according to claim 3, characterized in that: The cooling mechanism includes a water cooling box (54), a water cooling interlayer (55) and a connecting pipe (56). A water cooling box (54) is provided in the lower moving die base (5) on one side of the lower die core (51). A water cooling interlayer (55) is provided in the lower moving die base (5) below the lower die core (51). The water cooling interlayer (55) is connected to the water cooling box (54) through the connecting pipe (56) and a return pipe, and a circulation pump is provided on the connecting pipe (56).

8. The PET sheet injection molding equipment according to claim 5, characterized in that: A locking bolt (57) is provided on the side of the lower moving die base (5) away from the support frame (81). The lower die core (51) is fixedly installed on the lower moving die base (5) through the locking bolt (57).

9. The PET sheet injection molding equipment according to claim 1, characterized in that: The melting injection cylinder (21) is arranged in a conical cylinder structure. A feed valve is provided on the feed pipe (12). A vibrating screen is provided inside the raw material tank (1). A first vertical frame (10) is provided on one side of the raw material tank (1).

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