LSR liquid silica gel injection molding machine

Abstract

The invention relates to the technical field of precise injection molding, and particularly discloses an LSR liquid silica gel injection molding machine which comprises a rack, a vertical mold closing mechanism, a gel injection mechanism and a controller are arranged on the rack, the vertical mold closing mechanism is located at the top of the rack, and the vertical mold closing mechanism comprises a mold closing assembly, a driving assembly, a positioning assembly and a mold supporting assembly; the mold closing assembly is used for opening and closing a mold, the driving assembly is used for driving the mold closing assembly to move, the positioning assembly is used for positioning the mold closing assembly, the mold supporting assembly is used for supporting a product formed by the mold closing assembly, and the glue injection mechanism is installed on the vertical mold closing mechanism. The glue injection mechanism comprises a gun barrel assembly for heating and temperature control and a glue injection driving assembly for driving the gun barrel assembly to execute glue injection action, the controller is electrically connected with the vertical mold closing mechanism and the glue injection mechanism, and the controller controls the vertical mold closing mechanism and the glue injection mechanism to act orderly. The method has the effects of expanding the production scale and improving the production efficiency.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of precision injection molding, and in particular to an LSR liquid silicone rubber injection molding machine. BACKGROUND

[0002] In the field of industrial production, injection molding machines have always been one of the important equipment. With the continuous development of manufacturing industry, the demand for various injection molding products is increasing. Injection molding machines are widely used in many industries such as electronics, automobiles, medical treatment, etc. and can manufacture various parts and products, playing a key role in promoting the development of various industries. It makes it possible to mass-produce complex-shaped plastic products, improves production efficiency and product quality, and provides more possibilities for the research and design of new products. In the production of silicone rubber injection molding parts, due to the important use of such products in some special fields, such as medical equipment, protective parts of electronic equipment, etc., higher requirements are put forward for the production process and equipment.

[0003] In the past, in the field of injection molding machines, general equipment is often used for injection molding of various materials. When performing injection molding operation, horizontal injection molding method is mostly used. In order to realize multiple functions and adapt to different injection molding requirements, the structure of the equipment is relatively complicated, and many parts and complex transmission systems are required. In addition, when processing silicone rubber injection molding parts, there is no injection molding equipment specially optimized for the material properties of such materials, and the traditional injection molding method is still used to cope with it. Although this method can complete the injection molding task to a certain extent, it lacks pertinence and professionalism.

[0004] However, the existing injection molding machine has obvious defects. Since there is no special injection molding design for specific materials, especially for LSR liquid silicone rubber, the performance advantages of such special materials cannot be fully utilized. Moreover, the structure of the existing equipment is relatively complicated, and the horizontal injection molding setting method leads to a large occupation of space by the equipment, which is not conducive to the rational layout of the factory building and the efficient use of space, which greatly limits the expansion of production scale and the further improvement of production efficiency. SUMMARY

[0005] In order to expand the production scale and improve the production efficiency, the application provides an LSR liquid silicone rubber injection molding machine.

[0006] The LSR liquid silicone rubber injection molding machine provided by the application adopts the following technical scheme: An LSR liquid silicone rubber injection molding machine, comprising a rack, wherein the rack is provided with: The vertical mold closing mechanism is located at the top of the frame, and comprises a mold closing assembly, a driving assembly, a positioning assembly and a mold supporting assembly. The glue injection mechanism is installed on the vertical mold closing mechanism, and comprises a heated temperature-controlled barrel assembly and a glue injection driving assembly for driving the barrel assembly to perform a glue injection action. The controller is electrically connected with the vertical mold closing mechanism and the glue injection mechanism, and controls the vertical mold closing mechanism and the glue injection mechanism to perform an orderly action.

[0007] By adopting the above technical scheme, the frame supports the vertical mold closing mechanism, the glue injection mechanism and the controller, and the vertical mold closing mechanism, the glue injection mechanism and the controller work cooperatively, so that the LSR silicone glue can be injected, the structure is simple, and the land occupation is small. The vertical mold closing mechanism is convenient for processing specific materials such as LSR silicone glue, the vertical structure saves more space than the horizontal structure, the glue injection mechanism can accurately inject glue, the controller uniformly controls the orderly action of each mechanism, so that the whole injection molding process is efficient and the structure is reasonable, the stability and accuracy of the molding process are ensured, thereby facilitating the expansion of production scale and production efficiency.

[0008] Preferably, the mold closing assembly comprises an upper mold plate, a middle mold plate, a lower mold plate and a guide column, the guide column is vertically fixed on the frame, the middle mold plate is located between the upper mold plate and the lower mold plate, and the upper mold plate, the middle mold plate and the lower mold plate are movably sleeved on the guide column.

[0009] By adopting the above technical scheme, the guide column plays a role in guiding the upper mold plate, the middle mold plate and the lower mold plate to move up and down, and ensures the stability of the movement of each mold plate.

[0010] Preferably, the driving assembly comprises a first oil cylinder and a second oil cylinder, the first oil cylinder is fixedly arranged on the lower surface of the middle mold plate, the piston rod of the first oil cylinder is fixedly connected to the upper surface of the lower mold plate for driving the lower mold plate to move vertically up and down, one end of the second oil cylinder is fixedly connected to the lower surface of the middle mold plate, and the other end of the second oil cylinder is fixedly connected to the upper surface of the lower mold plate for outputting a downward thrust to the lower mold plate after the mold is closed.

[0011] By adopting the above technical scheme, the action of stretching and contracting of the piston rod of the first oil cylinder realizes the traction of the lower mold plate to perform the up and down movement, and the second oil cylinder outputs a downward thrust to the lower mold plate to clamp the mold after the mold is closed, thereby facilitating the improvement of the stability of the mold closing.

[0012] Preferably, the upper surface of the middle template is provided with a sliding plate that can move left and right. The sliding plate has a positioning hole. The positioning component includes a positioning seat and a pin. The positioning seat is fixedly connected to the upper surface of the lower template, and the pin is vertically fixedly connected to the positioning seat. When the mold is closed, the pin moves through the middle template and enters the positioning hole.

[0013] By adopting the above technical solution, after the mold is closed, the pin is movably inserted into the middle template and into the positioning hole, which plays a positioning role and helps to ensure the accuracy of mold closing.

[0014] Preferably, the mold-supporting assembly is disposed at the bottom of the middle template and located at the end of the slide plate. The mold-supporting assembly includes a mounting base, a drive cylinder, and a mold-supporting rod. The mounting base is fixedly connected to the bottom of the middle template, and there is a movable space between the mounting base and the middle template. The drive cylinder is vertically fixedly connected to the mounting base. The mold-supporting rod is coaxially fixedly connected to the piston rod of the drive cylinder. The mold-supporting rod is movably inserted through the middle template. The slide plate has a demolding hole for the mold-supporting rod to pass through from bottom to top.

[0015] By adopting the above technical solution, the mounting base supports the drive cylinder and the mold support rod. There is a space for movement between the mounting base and the middle template to facilitate the movement of the mold support rod. When the drive cylinder is activated, the mold support rod passes upward through the demolding hole to eject the molded product, thereby realizing the demolding operation and facilitating the removal of the product by the operator.

[0016] Preferably, the mold support assembly is provided in two sets, and the two sets of mold support assemblies are respectively located at both ends of the bottom of the middle mold plate, and two sets of demolding holes are correspondingly opened at both ends of the slide plate.

[0017] By adopting the above technical solution, two sets of demolding components are set at both ends of the bottom of the middle template, and two sets of demolding holes are opened at both ends of the slide plate, which is conducive to the smooth ejection of the product.

[0018] Preferably, the barrel assembly includes a barrel and a segmented heater, the segmented heater being disposed on the inner wall of the barrel and electrically connected to the controller.

[0019] By adopting the above technical solution, the barrel realizes the function of injecting rubber material. The segmented heater is set on the inner wall of the barrel and heats and controls the temperature of LSR silicone in the barrel by electric heating to ensure that the silicone is at a suitable injection temperature. The segmented heater can be controlled in segments according to different temperature requirements, which improves the heating accuracy.

[0020] Preferably, the glue injection driving assembly comprises a third oil cylinder, a connecting seat and a linear moving piece, the third oil cylinder is installed on the upper mold plate for driving the connecting seat to move vertically up and down, and the linear moving piece is located on the top of the connecting seat and connected to the barrel.

[0021] By adopting the above technical scheme, the third oil cylinder drives the connecting seat to move up and down, thereby driving the barrel to move up and down to realize the function of the barrel being pushed to the mold or leaving the mold. The linear moving piece generates a linear moving force acting on the connecting seat, thereby generating an injection thrust acting on the barrel.

[0022] Preferably, the linear moving piece comprises a driving motor and a lead screw, the lead screw is coaxially and fixedly connected to the output shaft of the driving motor, and the lead screw is threaded through the barrel.

[0023] By adopting the above technical scheme, the output shaft of the driving motor rotates to drive the lead screw to rotate, thereby generating a linear moving force acting on the connecting seat, thereby generating an injection thrust acting on the barrel.

[0024] Preferably, a sealing cover is wrapped outside the frame, a negative pressure dust suction pipeline and an air purification filter are arranged in the sealing cover, and the negative pressure dust suction pipeline is in communication with the air purification filter.

[0025] By adopting the above technical scheme, the sealing cover plays a protective and dustproof role. The negative pressure dust suction pipeline can suck away the dust and waste gas generated during the injection molding process, and the dust and waste gas are discharged after being filtered by the air purification filter, thereby ensuring the cleanliness of the working environment.

[0026] In summary, the present application has at least one of the following beneficial technical effects: 1. By arranging the vertical mold closing mechanism, the glue injection mechanism and the controller, the vertical mold closing mechanism, the glue injection mechanism and the controller work cooperatively to achieve the beneficial effects of being able to inject LSR silicone rubber and having simple structure and small footprint. The vertical mold closing mechanism is convenient for processing specific materials such as LSR silicone rubber. The vertical structure saves more space than the horizontal structure. The glue injection mechanism can accurately inject glue. The controller uniformly controls the orderly movement of each mechanism, so that the whole injection molding process is efficient and the structure is reasonable, thereby ensuring the stability and accuracy of the molding process, and facilitating the expansion of production scale and production efficiency.

[0027] 2. By arranging the first oil cylinder and the second oil cylinder, the action of stretching and contracting of the piston rod of the first oil cylinder realizes the traction of the lower mold plate to move up and down, and the second oil cylinder outputs downward thrust to the lower mold plate after closing the mold to clamp the mold, thereby facilitating the improvement of the stability of the mold closing.

[0028] 3. By setting the positioning seat and the pin post, when the mold is closed, the pin post is movably arranged through the middle mold plate and into the positioning hole, thereby playing a positioning role, so as to facilitate ensuring the accuracy of the mold closing. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic diagram of the overall structure of the LSR liquid silicone rubber injection molding machine in the embodiment of the present application.

[0030] Figure 2 is a schematic diagram of the vertical mold closing mechanism and the glue injection mechanism in the embodiment of the present application.

[0031] Figure 3 is a schematic diagram of the vertical mold closing mechanism and the glue injection mechanism in the embodiment of the present application.

[0032] Figure 4 is Figure 2 an enlarged view of part A.

[0033] Figure 5 is Figure 3 an enlarged view of part B.

[0034] Explanation of Reference Signs: 1, frame; 2, vertical mold closing mechanism; 21, mold closing assembly; 211, upper mold plate; 212, middle mold plate; 213, lower mold plate; 214, guide column; 22, driving assembly; 221, first oil cylinder; 222, second oil cylinder; 23, positioning assembly; 231, positioning seat; 232, pin post; 24, mold supporting assembly; 241, mounting seat; 242, driving air cylinder; 243, mold supporting rod; 3, glue injection mechanism; 31, barrel assembly; 311, barrel; 32, glue injection driving assembly; 321, third oil cylinder; 322, connecting seat; 323, linear moving part; 3231, driving motor; 3232, screw rod; 4, controller; 5, sliding plate; 6, positioning hole; 7, demolding hole; 8, sealing cover; 9, negative pressure dust suction pipeline; 10, air purification filter. DETAILED DESCRIPTION

[0035] The following will be described in detail in combination with the accompanying Figures 1-5 The present application will be further described in detail.

[0036] The embodiment of the present application discloses an LSR liquid silicone rubber injection molding machine, which will be described in detail with reference to the accompanying drawings. Figure 1 and Figure 2The system includes a frame 1, on which are mounted a vertical mold clamping mechanism 2, a glue injection mechanism 3, and a controller 4. The vertical mold clamping mechanism 2 is located at the top of the frame 1, and the glue injection mechanism 3 is mounted on the vertical mold clamping mechanism 2. The controller 4 is electrically connected to both the vertical mold clamping mechanism 2 and the glue injection mechanism 3. This design achieves the advantages of being able to perform injection molding of LSR silicone while maintaining a simple structure and small footprint. Because the vertical mold clamping mechanism 2 facilitates the processing of specific materials such as LSR silicone, and the vertical structure saves more space compared to a horizontal structure, the glue injection mechanism 3 can accurately inject glue, and the controller 4 uniformly controls the orderly operation of each mechanism, making the entire injection molding process efficient and structurally sound.

[0037] Reference Figure 1 and Figure 2 The vertical mold closing mechanism 2 includes a mold closing component 21, a drive component 22, a positioning component 23, and a mold supporting component 24. The mold closing component 21 is used to open and close the mold, the drive component 22 is used to drive the mold closing component 21 to move, the positioning component 23 is used to position the mold closing component 21, and the mold supporting component 24 is used to support the product formed by the mold closing component 21.

[0038] Reference Figure 2 and Figure 3 The mold clamping assembly 21 includes an upper mold plate 211, a middle mold plate 212, a lower mold plate 213, and guide pillars 214. The guide pillars 214 are made of high-strength metal, such as stainless steel, and are cylindrical in shape, vertically fixed to the frame 1. They can be fixed by welding or bolting. The upper mold plate 211, middle mold plate 212, and lower mold plate 213 are made of steel plate, possessing good strength and rigidity. They are all movably fitted onto the guide pillars 214, which guide the mold plates up and down, ensuring the stability of the mold plate movement. Alternatively, guide rails can be used instead of guide pillars 214, as long as stable mold plate movement is achieved. The middle mold plate 212 is located between the upper mold plate 211 and the lower mold plate 213; this layout facilitates the opening and closing of the mold.

[0039] Reference Figure 2 and Figure 3The driving assembly 22 comprises a first oil cylinder 221 and a second oil cylinder 222. Specifically, the first oil cylinder 221 and the second oil cylinder 222 are both hydraulic driving devices capable of providing stable power. The first oil cylinder 221 is fixedly arranged on the lower surface of the middle mold plate 212 and can be fixed on the middle mold plate 212 by means of bolts. The piston rod of the first oil cylinder 221 is fixedly connected to the upper surface of the lower mold plate 213. The first oil cylinder 221 drives the lower mold plate 213 to vertically move up and down by driving the piston rod to extend and retract. The second oil cylinder 222 is also fixedly connected to the lower surface of the middle mold plate 212 by means of bolts and the like. The other end of the second oil cylinder 222 is fixedly connected to the upper surface of the lower mold plate 213. The second oil cylinder 222 can output downward thrust to the lower mold plate 213 after the mold is closed, thereby ensuring the tightness of the closed mold. The oil cylinder can be replaced by an electric push rod as long as the mold plate can be driven and thrust can be output.

[0040] With reference to Figure 1 and Figure 2 , the upper surface of the middle mold plate 212 is provided with a slide plate 5 that can move left and right. The slide plate 5 is made of aluminum alloy and has the characteristics of light weight and high strength. The slide plate 5 is matched with the middle mold plate 212 through a sliding groove to realize left and right sliding. The slide plate 5 is provided with a positioning hole 6. With reference to Figure 3 , the positioning assembly 23 comprises a positioning seat 231 and a pin column 232. The positioning seat 231 is fixedly connected to the upper surface of the lower mold plate 213, and the pin column 232 is vertically fixedly connected to the positioning seat 231. The pin column 232 is made of hard alloy and has high wear resistance and hardness. When the mold is closed, the pin column 232 is movably arranged in the middle mold plate 212 and penetrates into the positioning hole 6, thereby playing a positioning role and ensuring the accuracy of the closed mold. The positioning assembly 23 can also adopt a magnetic positioning mode, in which a magnet is arranged at the corresponding position to realize positioning.

[0041] With reference to Figure 2 and Figure 3 , the mold supporting assembly 24 is arranged at the bottom of the middle mold plate 212 and located at the end of the slide plate 5. With reference to Figure 5The mold supporting assembly 24 comprises a mounting base 241, a driving cylinder 242 and a mold supporting rod 243. Specifically, the mounting base 241 is fixedly connected to the bottom of the middle mold plate 212, and the mounting base 241 has a movement space with the middle mold plate 212, facilitating the installation and movement of the driving cylinder 242 and the mold supporting rod 243. The driving cylinder 242 is fixedly connected to the mounting base 241 by bolts, and the mold supporting rod 243 is coaxially fixedly connected to the piston rod of the driving cylinder 242 and movably penetrates the middle mold plate 212. Meanwhile, the sliding plate 5 is provided with a demolding hole 7 through which the mold supporting rod 243 penetrates from bottom to top. When the driving cylinder 242 moves, the mold supporting rod 243 penetrates the demolding hole 7 upward to push out the formed product, thereby achieving demolding. The driving cylinder 242 can also be replaced by a small electric motor and a screw rod 3232 transmission mechanism. It should be noted that the mold supporting assembly 24 is provided with two groups, and the two groups of mold supporting assemblies 24 are arranged at the two ends of the bottom of the middle mold plate 212, and the two ends of the sliding plate 5 are provided with two groups of demolding holes 7, so that the product can be pushed out more stably.

[0042] With reference to Figure 1 and Figure 2 The glue injection mechanism 3 comprises a heated barrel assembly 31 and a glue injection driving assembly 32 for driving the barrel assembly 31 to perform the glue injection action. Figure 4 The barrel assembly 31 comprises a barrel 311 and a sectional heater (not shown in the figure). The barrel 311 is made of high-temperature-resistant alloy steel and can withstand high temperature and high pressure. The sectional heater is arranged on the inner wall of the barrel 311 and heats and controls the temperature of the LSR silicone glue in the barrel 311 by electric heating, so as to ensure that the silicone glue is at a suitable injection temperature. The sectional heater can be controlled in sections according to different temperature requirements, thereby improving the accuracy of heating. The sectional heater can also be replaced by an electromagnetic heater.

[0043] With reference to Figure 2 and Figure 4 The glue injection driving assembly 32 comprises a third oil cylinder 321, a connecting seat 322 and a linear moving piece 323. The third oil cylinder 321 is installed on the upper mold plate 211 by bolts and is used to drive the connecting seat 322 to move vertically up and down. The linear moving piece 323 is located at the top of the connecting seat 322 and is connected to the barrel 311. The linear moving piece 323 comprises a driving motor 3231 and a screw rod 3232. The driving motor 3231 is arranged as a stepping motor and can be accurately controlled to rotate. The screw rod 3232 is coaxially fixedly connected to the output shaft of the driving motor 3231 and is threadedly arranged in the barrel 311. When the driving motor 3231 rotates, the screw rod 3232 drives the barrel 311 to move linearly, thereby realizing the glue injection action. The screw rod 3232 transmission can also be replaced by a belt transmission or a chain transmission.

[0044] With reference to Figure 1The sealing cover 8 is made of plastic plate or metal plate, and plays a protective and dustproof role. The sealing cover 8 is internally provided with a negative pressure dust suction pipeline 9 and an air purification filter 10, and the negative pressure dust suction pipeline 9 is in communication with the air purification filter 10. The negative pressure dust suction pipeline 9 can suck the dust and waste gas generated in the injection molding process, and the dust and waste gas are discharged after being filtered by the air purification filter 10, so that the working environment is kept clean. The air purification filter 10 can be an activated carbon filter or a HEPA filter.

[0045] With reference to Figure 1 The controller 4 is electrically connected with the vertical mold closing mechanism 2 and the glue injection mechanism 3. The controller 4 is a PLC programmable logic controller 4, which can control the action sequence and time of each mechanism according to a preset program, and realize automatic control of the entire injection molding process.

[0046] The implementation principle of the LSR liquid silicone rubber injection molding machine is as follows: the LSR liquid silicone rubber injection molding machine adopts a vertical structure, which saves horizontal space and reduces the floor area compared with a traditional horizontal injection molding machine. Meanwhile, through targeted structural design, the special material LSR silicone rubber can be better processed, and the injection molding effect is improved. Each mechanism has clear division of labor, and orderly action under the unified coordination of the controller 4, so that the efficiency and stability of the injection molding process are ensured. For example, the mold closing assembly 21 accurately opens and closes the mold under the action of the driving assembly 22, the positioning assembly 23 ensures the accuracy of mold closing, the mold supporting assembly 24 facilitates product demolding, and the glue injection mechanism 3 can accurately inject heated silicone rubber into the mold. The whole process forms an organic whole, greatly improves the production efficiency and product quality, and makes a significant improvement on the prior art.

[0047] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An LSR liquid silicone rubber injection molding machine characterized by, It comprises a rack (1) on which is arranged: A vertical mold closing mechanism (2) is located on the top of the rack (1), which comprises a mold closing assembly (21), a driving assembly (22), a positioning assembly (23) and a mold supporting assembly (24), the mold closing assembly (21) is used to open and close the mold, the driving assembly (22) is used to drive the mold closing assembly (21) to move, the positioning assembly (23) is used to position the mold closing assembly (21), and the mold supporting assembly (24) is used to support the product formed by the mold closing assembly (21); An injection mechanism (3) is installed on the vertical mold closing mechanism (2), which comprises a heated temperature-controlled barrel assembly (31) and an injection driving assembly (32) for driving the barrel assembly (31) to perform injection action; A controller (4) is electrically connected with the vertical mold closing mechanism (2) and the injection mechanism (3), and the controller (4) controls the vertical mold closing mechanism (2) and the injection mechanism (3) to move in order.

2. The LSR liquid silicone rubber injection molding machine of claim 1, wherein: The mold closing assembly (21) comprises an upper mold plate (211), a middle mold plate (212), a lower mold plate (213) and a guide column (214), the guide column (214) is vertically fixed on the rack (1), the middle mold plate (212) is located between the upper mold plate (211) and the lower mold plate (213), and the upper mold plate (211), the middle mold plate (212) and the lower mold plate (213) are movably sleeved on the guide column (214).

3. The LSR liquid silicone rubber injection molding machine of claim 2, wherein: The driving assembly (22) comprises a first oil cylinder (221) and a second oil cylinder (222), the first oil cylinder (221) is fixedly arranged on the lower surface of the middle mold plate (212), the piston rod of the first oil cylinder (221) is fixedly connected to the upper surface of the lower mold plate (213) for driving the lower mold plate (213) to move vertically up and down, one end of the second oil cylinder (222) is fixedly connected to the lower surface of the middle mold plate (212), and the other end of the second oil cylinder (222) is fixedly connected to the upper surface of the lower mold plate (213) for outputting downward thrust to the lower mold plate (213) after closing the mold.

4. The LSR liquid silicone rubber injection molding machine of claim 2, wherein: The upper surface of the middle mold plate (212) is provided with a slide plate (5) which can move left and right, the slide plate (5) is provided with a positioning hole (6), the positioning assembly (23) comprises a positioning seat (231) and a pin column (232), the positioning seat (231) is fixedly connected to the upper surface of the lower mold plate (213), and the pin column (232) is vertically fixedly connected to the positioning seat (231), when the mold is closed, the pin column (232) is movably arranged in the middle mold plate (212) and penetrates into the positioning hole (6).

5. The LSR liquid silicone rubber injection molding machine of claim 4, wherein: The mold supporting assembly (24) is arranged at the bottom of the middle mold plate (212) and at the end of the sliding plate (5), the mold supporting assembly (24) comprises a mounting seat (241), a driving cylinder (242) and a mold supporting rod (243), the mounting seat (241) is fixedly connected to the bottom of the middle mold plate (212), the mounting seat (241) and the middle mold plate (212) have a movement space, the driving cylinder (242) is vertically fixedly connected to the mounting seat (241), the mold supporting rod (243) is coaxially fixedly connected to the piston rod of the driving cylinder (242), the mold supporting rod (243) movably penetrates through the middle mold plate (212), and the sliding plate (5) is provided with a demolding hole (7) through which the mold supporting rod (243) penetrates from bottom to top.

6. The LSR liquid silicone rubber injection molding machine of claim 4, wherein: The mold supporting assembly (24) is provided with two groups, and the two groups of mold supporting assemblies (24) are arranged at two ends of the bottom of the middle mold plate (212), and the sliding plate (5) is provided with two groups of demolding holes (7) corresponding to the positions of the two ends.

7. The LSR liquid silicone rubber injection molding machine of claim 2, wherein: The barrel assembly (31) comprises a barrel (311) and a segmented heater, the segmented heater is arranged on the inner wall of the barrel (311), and the segmented heater is electrically connected with the controller (4).

8. The LSR liquid silicone rubber injection molding machine of claim 7, wherein: The glue injection driving assembly (32) comprises a third oil cylinder (321), a connecting seat (322) and a linear moving part (323), the third oil cylinder (321) is installed on the upper mold plate (211) and used for driving the connecting seat (322) to vertically move up and down, and the linear moving part (323) is located at the top of the connecting seat (322) and connected to the barrel (311).

9. The LSR liquid silicone rubber injection molding machine of claim 8, wherein: The linear moving part (323) comprises a driving motor (3231) and a lead screw (3232), the lead screw (3232) is coaxially fixedly connected to the output shaft of the driving motor (3231), and the lead screw (3232) is threadedly penetrated through the barrel (311).

10. The LSR liquid silicone rubber injection molding machine of claim 1, wherein: The outer side of the rack (1) is covered with a sealing cover (8), the sealing cover (8) is provided with a negative pressure dust collection pipeline (9) and an air purification filter (10), and the negative pressure dust collection pipeline (9) and the air purification filter (10) are in communication.

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