An injection molding system for producing plastic diaphragm filter press plates

Abstract

An injection molding system for producing plastic diaphragm filter press plates includes an injection molding machine and a molding device, wherein the molding device includes a rotating frame, a molding table, a shaping table, a cooling table and a demoulding conveying mechanism; the rotating frame is provided with a horizontally arranged support arm, the support arm is provided with an injection mold, and the injection mold is arranged corresponding to the injection molding machine. The injection molding system for producing plastic diaphragm filter press plates adopted by the present invention is provided with a special molding device, through vacuum injection molding, elastic vibration molding, rapid cooling and demoulding operations, each process is closely coordinated and connected scientifically, so that the injection molded plastic diaphragm filter press plates have a tight structure, good plasticity, qualified size, and no bubbles inside, thereby ensuring the yield rate of the injection molding operation of the plastic diaphragm filter press plates, thereby increasing the production efficiency of the plastic diaphragm filter press plates and reducing the production cost.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy engineering equipment, and in particular relates to an injection molding system for producing a plastic diaphragm filter press plate. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of the injection molding method are fast production speed, high efficiency, automated operation, a wide variety of colors, shapes from simple to complex, sizes from large to small, and precise product size. The product is easy to update and can be made into parts with complex shapes. Injection molding is suitable for mass production and molding processing fields such as products with complex shapes. At a certain temperature, the completely molten plastic material is stirred by a screw, injected into the mold cavity with high pressure, and cooled and solidified to obtain a molded product. This method is suitable for mass production of parts with complex shapes and is one of the important processing methods.

[0003] In existing injection molding equipment, the injection mold is installed on the injection molding machine. After the injection molding, the injection mold is opened and demolded after a short molding process. The advantages of this operation mode are fast speed and high efficiency; however, when the injection mold is large, if the molding time is not enough before demolding, it will lead to defects such as unqualified structural dimensions of the injection molded part, bubbles inside the injection molded part, and fragility of the plastic part. In particular, the filter press plate with a plastic structure has to withstand greater pressure during operation. If the above-mentioned injection molding defects occur during injection molding, it will seriously affect the normal operation of the filter press plate filter press, and even cause serious safety accidents.

[0004] When using conventional injection molding equipment to perform injection molding of filter press plates, the yield rate of the injection molded parts cannot be guaranteed. Therefore, designing an injection molding system for producing plastic diaphragm filter press plates has become a technical problem that needs to be solved. Summary of the invention

[0005] The injection molding system for producing a plastic diaphragm filter press plate adopted by the present invention is provided with a special molding device. Through vacuum injection molding, elastic vibration molding, rapid cooling and demolding operations, the coordination and connection between each process are tight and scientific, so that the injection-molded plastic diaphragm filter press plate has a tight structure, good plasticity, qualified size, and no bubbles inside, thereby ensuring the yield rate of the injection molding operation of the plastic diaphragm filter press plate, thereby increasing the production efficiency of the plastic diaphragm filter press plate and reducing the production cost.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] An injection molding system for producing a plastic diaphragm filter press plate comprises an injection molding machine and a molding device, wherein the molding device comprises a rotating frame, a molding table, a shaping table, a cooling table and a demoulding conveying mechanism; a horizontally arranged support arm is arranged on the rotating frame, an injection mold is arranged on the support arm, the injection mold is arranged corresponding to the injection molding machine, an injection hole and two cooling holes are arranged on the side of the injection mold, a vacuum channel is opened at the bottom of the injection mold, and a one-way valve is arranged in the vacuum channel; the molding table is arranged at an injection molding station, a through hole is opened on the table top of the molding table, a mounting seat is arranged at the bottom of the molding table, a vertically arranged telescopic rod is arranged on the mounting seat, a vacuum joint is arranged at the top of the telescopic rod, and the vacuum joint is arranged corresponding to the through hole; the molding table is arranged at the molding station, and a vibration motor is arranged at the bottom of the molding table; the cooling table is arranged at the cooling station, and a cooling mechanism is arranged on the side of the cooling table; the demoulding conveying mechanism is arranged at the demoulding station, and the demoulding conveying mechanism comprises a demoulding structure and a conveyor belt.

[0008] The horizontally arranged support arm is a support arm of a telescopic rod structure, an electromagnet is provided at the end of the telescopic section of the telescopic rod, the telescopic rod is connected to the injection mold via the electromagnet, and a support spring is provided between the end of the fixed section of the telescopic rod and the injection mold.

[0009] The four legs of the forming table are automatic legs, and the appearance and structure of the four automatic legs are the same; the automatic legs include an upper leg and a lower leg, a coaxially arranged telescopic rod is provided between the upper leg and the lower leg, and a supporting spring is also provided between the upper leg and the lower leg.

[0010] The cooling mechanism on the side of the cooling table includes a base, a cooling box and a mounting frame are provided on the base, a horizontally arranged telescopic rod is provided on the mounting frame, a first mounting panel is provided at the end of the telescopic rod, the mounting panel is provided with an injection joint and a return joint, the injection joint and the return joint are respectively connected to the cooling box through pipelines, an output pump is provided in the cooling box, and the output pump is connected to the injection joint through a pipeline.

[0011] The demoulding structure on the conveyor belt includes a support frame, which is arranged on the conveyor belt. The support frame is provided with a horizontally arranged telescopic rod, the end of the telescopic rod is provided with a second mounting panel, and the second mounting panel is provided with a blowing joint, which is arranged corresponding to the injection hole.

[0012] The injection mold includes a front mold frame, a rear mold frame, a fixed plate and a tensioning spring. Four sliding rods are arranged on the rear side of the front mold frame. The rear mold frame is provided with connecting holes. The rear mold frame is plugged into the sliding rods through the connecting holes. The fixed plate is fixed to the four sliding rods by bolts. The tensioning spring is arranged between the rear mold frame and the fixed plate. The electromagnet of the support arm is connected to the fixed plate. A limit flange is respectively provided on both sides of the rear mold frame.

[0013] The second mounting panel is also provided with two horizontally arranged push rods, and the two push rods are respectively arranged corresponding to the limiting flanges on both sides of the rear mold frame.

[0014] The rotating frame is provided with four horizontally arranged supporting arms, and each of the four supporting arms is provided with an injection mold.

[0015] An elastic protective layer is arranged on the conveyor belt.

[0016] The cold source of the cooling box is tap water, ice cubes or liquid nitrogen.

[0017] Beneficial Effects

[0018] By adopting the above technical solution, the beneficial effects of the present invention are:

[0019] The present invention adopts an injection molding system for producing a plastic diaphragm filter press plate. During the injection molding of the filter press plate, the support arm of the rotating frame rotates the injection mold to the injection molding station, the injection head of the injection molding machine is connected to the injection hole, and the telescopic rod at the bottom of the molding table moves to connect the vacuum joint to the vacuum channel, and the mold cavity of the injection mold is vacuumed. After the mold cavity is vacuumed, the injection molding machine ensures that the thermoplastic fills the mold cavity during injection molding, which can effectively avoid the occurrence of unsatisfactory and unqualified injection molding of the filter press plate injection molded part structure;

[0020] After the injection molding is completed, the support arm of the rotating frame rotates the injection mold to the molding station. After the injection mold moves to the molding table, the movable rod of the support arm is retracted, and the movable rod of the automatic leg of the molding table is retracted, so that the molding table and the injection mold are in a soft connection state, and the vibration motor at the bottom of the molding table is activated to make the hot plastic fully vibrate and expand in the injection mold, so that the molding is tight and solid;

[0021] After the molding is completed, the movable rod of the support arm of the rotating frame re-fixes the injection mold through the electromagnet, and the injection mold is rotated to the cooling station. The telescopic rod of the cooling mechanism moves to align the injection joint and the return joint with the two cooling holes respectively. The output pump in the cooling box moves to transport the cold source to the cooling channel of the injection mold. The cold source enters from one cooling hole through the cooling channel and flows back to the cooling box from another cooling hole. The injection mold meets the demoulding standard after rapid cooling by the cold source.

[0022] After cooling is completed, the support arm of the rotating frame rotates the injection mold to the demoulding station, the telescopic rod of the demoulding structure moves, and the two ejector rods on the second mounting panel are aligned with the limit flanges on both sides of the rear mold frame to push the rear mold frame backward. At this time, the air blowing joint is aligned with the injection hole to blow air, and the molded filter press plate injection molded part is blown out of the mold cavity of the front mold frame. The filter press plate injection molded part falls downward onto the conveyor belt provided with an elastic protective layer. The conveyor belt transports the filter press plate injection molded part to the workpiece collection station, completing the injection molding operation of the plastic diaphragm filter press plate;

[0023] Compared with the existing conventional injection molding equipment, the injection molding system for producing a plastic diaphragm filter press plate adopted by the present invention is equipped with a special molding device. Through vacuum injection molding, elastic vibration molding, rapid cooling and demolding operations, the coordination and connection between each process are tight and scientific, so that the injection-molded plastic diaphragm filter press plate has a tight structure, good plasticity, qualified size, and no bubbles inside, thereby ensuring the yield rate of the injection molding operation of the plastic diaphragm filter press plate, thereby increasing the production efficiency of the plastic diaphragm filter press plate and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0025] Figure 2 The structure of the present invention is schematically shown Figure 2 ;

[0026] Figure 3 It is a structural schematic diagram of the injection molding station in the present invention;

[0027] Figure 4 It is a structural schematic diagram of the molding station in the present invention;

[0028] Figure 5 It is a structural schematic diagram of the cooling station in the present invention;

[0029] Figure 6 It is a structural schematic diagram of the demoulding station in the present invention;

[0030] Figure 7 It is a structural schematic diagram of the injection mold in the present invention;

[0031] Figure 8 It is a schematic diagram of the cooling channel structure of the injection mold in the present invention;

[0032] Fig. 9 The structure of the front template of the injection mold in the present invention is schematically shown. Figure 1 ;

[0033] Fig.10 The structure of the front template of the injection mold in the present invention is schematically shown. Figure 2 ;

[0034] Fig.11 It is a schematic structural diagram of the rear template of the injection mold in the present invention.

[0035] Injection molding machine 1, rotating frame 2, molding table 3, shaping table 4, cooling table 5, support arm 6, injection hole 7, cooling hole 8, vacuum channel 9, vacuum joint 10, vibration motor 11, conveyor belt 12, support spring 13, upper leg 14, lower leg 15, cooling box 16, mounting frame 17, first mounting panel 18, injection joint 19, reflux joint 20, temperature sensor 21, second mounting panel 22, blowing joint 23, front mold frame 24, rear mold frame 25, fixing plate 26, tightening spring 27, slide bar 28, limit flange 29, ejector rod 30. DETAILED DESCRIPTION

[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0038] like Figure 1-Figure 11 As shown, an injection molding system for producing a plastic diaphragm filter press plate comprises an injection molding machine 1 and a molding device, wherein the molding device comprises a rotating frame 2, a molding table 3, a shaping table 4, a cooling table 5 and a demoulding conveying mechanism; a horizontally arranged support arm 6 is arranged on the rotating frame 2, an injection mold is arranged on the support arm 6, the injection mold is arranged corresponding to the injection molding machine 1, an injection hole 7 and two cooling holes 8 are arranged on the side of the injection mold, a vacuum channel 9 is opened at the bottom of the injection mold, and a one-way valve is arranged in the vacuum channel 9; the molding table 3 is arranged at the injection molding station, a through hole is opened on the table top of the molding table 3, a mounting seat is arranged at the bottom of the molding table 3, a vertically arranged telescopic rod is arranged on the mounting seat, a vacuum joint 10 is arranged at the top of the telescopic rod, and the vacuum joint 10 is arranged corresponding to the through hole; the molding table 3 is arranged at the molding station, and a vibration motor 11 is arranged at the bottom of the molding table 3; the cooling table 5 is arranged at the cooling station, and a cooling mechanism is arranged on the side of the cooling table 5; the demoulding conveying mechanism is arranged at the demoulding station, and the demoulding conveying mechanism comprises a demoulding structure and a conveyor belt 12. The vacuum joint 10 is connected to an external vacuum pump through a pipeline.

[0039] The horizontally arranged support arm 6 is a support arm 6 of a telescopic rod structure. An electromagnet is provided at the end of the telescopic section of the telescopic rod. The telescopic rod is connected to the injection mold through the electromagnet. A support spring 13 is provided between the end of the fixed section of the telescopic rod and the injection mold.

[0040] The four legs of the molding table 3 are automatic legs, and the appearance and structure of the four automatic legs are the same; the automatic legs include an upper leg 14 and a lower leg 15, a telescopic rod coaxially arranged between the upper leg 14 and the lower leg 15, and a support spring 13 between the upper leg 14 and the lower leg 15. When the telescopic end of the telescopic rod is fully extended, the upper leg 14 and the lower leg 15 are pressed tightly by the telescopic end of the telescopic rod, and the molding table 3 is a hard-supported workbench. When the telescopic end of the telescopic rod is fully retracted, the molding table 3 becomes a soft-supported workbench supported by four support springs 13, and the soft-supported workbench facilitates the vibration motor to perform vibration molding operations on the injection mold.

[0041] The cooling mechanism on the side of the cooling table 5 includes a base, on which a cooling box 16 and a mounting frame 17 are provided. A horizontally arranged telescopic rod is provided on the mounting frame 17, and a first mounting panel 18 is provided at the end of the telescopic rod. The mounting panel is provided with an injection joint 19 and a return joint 20, and the injection joint 19 and the return joint 20 are respectively connected to the cooling box 16 through pipes. An output pump is provided in the cooling box 16, and the output pump is connected to the injection joint 19 through a pipe. The first mounting panel 18 is also provided with a temperature sensor 21, which can monitor the temperature of the injection mold in real time and feed back the temperature parameters of the injection mold to the controller.

[0042] The demoulding structure on the conveyor belt 12 includes a support frame, which is arranged on the conveyor belt 12. The support frame is provided with a horizontally arranged telescopic rod, and a second mounting panel 22 is provided at the end of the telescopic rod. A blow joint 23 is provided on the second mounting panel 22, and the blow joint 23 is arranged corresponding to the injection hole 7. The blow joint 23 is connected to an external air source through a pipeline.

[0043] The injection mold includes a front mold frame 24, a rear mold frame 25, a fixing plate 26 and a tensioning spring 27. Four sliding rods 28 are arranged on the rear side of the front mold frame 24. The rear mold frame 25 is provided with connecting holes. The rear mold frame 25 is plugged into the sliding rods 28 through the connecting holes. The fixing plate 26 is fixed to the four sliding rods 28 by bolts. The tensioning spring 27 is arranged between the rear mold frame 25 and the fixing plate 26. The electromagnet of the support arm 6 is connected to the fixing plate 26. A limit flange 29 is provided on both sides of the rear mold frame 25.

[0044] Two horizontally arranged push rods 30 are also provided on the second mounting panel 22, and the two push rods 30 are respectively arranged corresponding to the limiting flanges 29 on both sides of the rear mold frame 25. The two push rods 30 contact the limiting flanges 29 on both sides of the rear mold frame 25 to push the rear mold frame 25 backwards, and at this time, the air blowing joint 23 is connected to the injection hole 7, and the air blowing joint 23 blows air to blow the filter press plate injection molded part out of the mold cavity.

[0045] The rotating frame 2 is provided with four horizontally arranged support arms 6 , and each of the four support arms 6 is provided with an injection mold.

[0046] An elastic protective layer is arranged on the conveyor belt 12. The filter press plate injection molded parts blown out from the mold cavity fall onto the conveyor belt 12 provided with the elastic protective layer, so as to prevent the filter press plate injection molded parts from contacting the hard conveyor belt 12 and being damaged.

[0047] The cooling source of the cooling box 16 is tap water, ice or liquid nitrogen. Different cooling sources can be replaced in the cooling box 16 according to cooling requirements, and different cooling sources can achieve different cooling effects.

[0048] Embodiment 1

[0049] The support arm 6 of the rotating frame 2 drives the injection mold to sequentially undergo vacuum injection molding at the injection molding station, elastic vibration characterization at the molding station, rapid cooling of the cold source at the cooling station, and automatic demoulding collection at the demoulding station, so that the injection molded filter press plate has a compact structure, good plasticity, qualified size, and no bubbles inside, which greatly improves the success rate of injection molded parts.

[0050] Embodiment 2

[0051] Four support arms 6 are arranged on the rotating frame 2, and each support arm 6 is provided with an injection mold. The four support arms 6 are controlled by a PLC controller to move synchronously and orderly to different workstations to perform different injection molding operations, which greatly improves the operating efficiency of the injection molding system for the production of plastic diaphragm filter press plates.

[0052] Embodiment 3

[0053] The injection molding system used in the production of plastic diaphragm filter press plates can also be applied to the injection molding of other injection molded parts by replacing different injection molds; the molding steps can be selected according to the injection molding requirements of different injection molded parts; for example, injection molded part A does not require vibration molding operations, and injection molding of injection molded part A can skip the molding station and go directly to the cooling station; for example, injection molded part B does not require cooling molding operations, and injection molding and vibration molding of injection molded part A can skip the cooling station and go directly to the demolding station, and the operation procedures can be flexibly adjusted to meet the injection molding process flow of different injection molded parts.

[0054] By adopting the above technical solution, the beneficial effects of the present invention are:

[0055] The present invention adopts an injection molding system for producing a plastic diaphragm filter press plate. During the injection molding of the filter press plate, the support arm 6 of the rotating frame 2 rotates the injection mold to the injection molding station, the injection head of the injection molding machine 1 is connected to the injection hole 7, and the telescopic rod at the bottom of the molding table 3 moves to connect the vacuum joint 10 to the vacuum channel 9, and the mold cavity of the injection mold is vacuumed. After the mold cavity is vacuumed, the injection molding machine 1 ensures that the thermoplastic fills the mold cavity during injection molding, which can effectively avoid the occurrence of unsatisfactory and unqualified injection molding of the filter press plate injection molded part structure;

[0056] After the injection molding is completed, the support arm 6 of the rotating frame 2 rotates the injection mold to the molding station. After the injection mold moves to the molding table 3, the movable rod of the support arm 6 is retracted, and the movable rod of the automatic leg of the molding table 3 is retracted, so that the molding table 3 and the injection mold are in a soft connection state, and the vibration motor 11 at the bottom of the molding table 3 is activated to make the hot plastic fully vibrate and expand in the injection mold, so that the molding is tight and strong;

[0057] After the molding is completed, the movable rod of the support arm 6 of the rotating frame 2 re-fixes the injection mold through the electromagnet, and the injection mold is rotated to the cooling station. The telescopic rod of the cooling mechanism moves the injection joint 19 and the return joint 20 to align with the two cooling holes 8 respectively, and the output pump in the cooling box 16 moves to transport the cold source to the cooling channel of the injection mold. The cold source enters from one cooling hole 8 through the cooling channel and flows back to the cooling box 16 from the other cooling hole 8. The injection mold meets the demoulding standard after rapid cooling by the cold source;

[0058] After cooling is completed, the support arm 6 of the rotating frame 2 rotates the injection mold to the demoulding station, the telescopic rod of the demoulding structure moves, and the two push rods 30 on the second mounting panel 22 are aligned with the limit flanges 29 on both sides of the rear mold frame 25 to push the rear mold frame 25 backward. At this time, the blowing joint 23 is aligned with the injection hole 7 to blow air, and the molded filter press plate injection molded part is blown out from the mold cavity of the front mold frame 24. The filter press plate injection molded part falls downward onto the conveyor belt 12 provided with an elastic protective layer. The conveyor belt 12 conveys the filter press plate injection molded part to the workpiece collection station, completing the injection molding operation of the plastic diaphragm filter press plate;

[0059] Compared with the existing conventional injection molding equipment, the injection molding system for producing a plastic diaphragm filter press plate adopted by the present invention is equipped with a special molding device. Through vacuum injection molding, elastic vibration molding, rapid cooling and demolding operations, the coordination and connection between each process are tight and scientific, so that the injection-molded plastic diaphragm filter press plate has a tight structure, good plasticity, qualified size, and no bubbles inside, thereby ensuring the yield rate of the injection molding operation of the plastic diaphragm filter press plate, thereby increasing the production efficiency of the plastic diaphragm filter press plate and reducing the production cost.

[0060] The control box of the present invention is provided with a PLC controller, and the system is operated through the PLC controller. The PLC controller belongs to existing conventional equipment, and its structural features are not described in detail.

[0061] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection molding system for producing a plastic membrane filter press plate, comprising an injection molding machine and a molding device, characterized in that: The molding device comprises a rotating frame, a molding table, a shaping table, a cooling table and a demoulding conveying mechanism; the rotating frame is provided with a horizontally arranged support arm, the support arm is provided with an injection mold, the injection mold is arranged corresponding to the injection molding machine, the side of the injection mold is provided with an injection hole and two cooling holes, the bottom of the injection mold is provided with a vacuum channel, and a one-way valve is provided in the vacuum channel; the molding table is arranged at the injection molding station, a through hole is arranged on the table top of the molding table, a mounting seat is arranged at the bottom of the molding table, a vertically arranged telescopic rod is arranged on the mounting seat, a vacuum joint is arranged at the top of the telescopic rod, and the vacuum joint is arranged corresponding to the through hole; the molding table is arranged at the molding station, and a vibration motor is arranged at the bottom of the molding table; the cooling table is arranged at the cooling station, and a cooling mechanism is arranged on the side of the cooling table; the demoulding conveying mechanism is arranged at the demoulding station, and the demoulding conveying mechanism comprises a demoulding structure and a conveyor belt, The horizontally arranged support arm is a support arm of a telescopic rod structure, an electromagnet is provided at the end of the telescopic section of the telescopic rod, the telescopic rod is connected to the injection mold via the electromagnet, and a support spring is provided between the end of the fixed section of the telescopic rod and the injection mold.

2. The injection molding system for producing a plastic membrane filter press plate according to claim 1, characterized in that: The four legs of the forming table are automatic legs, and the appearance and structure of the four automatic legs are the same; the automatic legs include an upper leg and a lower leg, a coaxially arranged telescopic rod is provided between the upper leg and the lower leg, and a supporting spring is also provided between the upper leg and the lower leg.

3. The injection molding system for producing a plastic membrane filter press plate according to claim 2, characterized in that: The cooling mechanism on the side of the cooling table includes a base, a cooling box and a mounting frame are provided on the base, a horizontally arranged telescopic rod is provided on the mounting frame, a first mounting panel is provided at the end of the telescopic rod, the mounting panel is provided with an injection joint and a return joint, the injection joint and the return joint are respectively connected to the cooling box through pipelines, an output pump is provided in the cooling box, and the output pump is connected to the injection joint through a pipeline.

4. The injection molding system for producing a plastic membrane filter press plate according to claim 3, characterized in that: The demoulding structure on the conveyor belt includes a support frame, which is arranged on the conveyor belt. The support frame is provided with a horizontally arranged telescopic rod, the end of the telescopic rod is provided with a second mounting panel, and the second mounting panel is provided with a blowing joint, which is arranged corresponding to the injection hole.

5. The injection molding system for producing a plastic membrane filter press plate according to claim 4, characterized in that: The injection mold includes a front mold frame, a rear mold frame, a fixed plate and a tensioning spring. Four sliding rods are arranged on the rear side of the front mold frame. The rear mold frame is provided with connecting holes. The rear mold frame is plugged into the sliding rods through the connecting holes. The fixed plate is fixed to the four sliding rods by bolts. The tensioning spring is arranged between the rear mold frame and the fixed plate. The electromagnet of the support arm is connected to the fixed plate. A limit flange is respectively provided on both sides of the rear mold frame.

6. The injection molding system for producing a plastic membrane filter press plate according to claim 5, characterized in that: The second mounting panel is also provided with two horizontally arranged push rods, and the two push rods are respectively arranged corresponding to the limiting flanges on both sides of the rear mold frame.

7. The injection molding system for producing a plastic membrane filter press plate according to claim 6, characterized in that: The rotating frame is provided with four horizontally arranged supporting arms, and each of the four supporting arms is provided with an injection mold.

8. The injection molding system for producing a plastic membrane filter press plate according to claim 7, characterized in that: An elastic protective layer is arranged on the conveyor belt.

9. The injection molding system for producing a plastic membrane filter press plate according to claim 8, characterized in that: The cold source of the cooling box is tap water, ice cubes or liquid nitrogen.

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