A multi-station injection molding die and its molding method

Abstract

This invention relates to the field of injection molding technology and discloses a multi-station injection molding die and its molding method, including a lifting assembly. The lifting assembly includes a base plate. During the upward movement of the upper die, it drives a compression rod to move upward. As the compression rod moves upward, it compresses the air in the lower die, thereby pushing the lifting rod upward. The lifting rod drives the lifting plate to move upward as well. Since the molded plastic will stick to the inner wall of the lower die, it may require a large force to push the plastic. Therefore, before pushing the plastic, the plastic is stationary. As the upper die drives the compression rod to continue moving upward to continuously input air into the fixed sleeve, the air pressure gradually increases, and the force applied to the lifting rod also increases. When the upper die moves a certain distance, the air pressure is large enough to lift the plastic upward through the lifting plate.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, specifically to a multi-station injection molding die and its molding method. Background Technology

[0002] Plastic is first heated and melted in the heating barrel of the injection molding machine. Then, driven by the screw or piston of the injection molding machine, it enters the mold cavity through the nozzle and the gating system of the mold. Finally, it hardens and solidifies in the mold cavity. This is the simple process of injection molding. During the demolding process, because plastic tends to stick to the inner wall of the mold, demolding is difficult. Therefore, structures such as ejector pins are needed to eject the molded plastic.

[0003] However, since the plastic will adhere to the inner wall of the mold on all four sides, and the contact area between the ejector pin and the plastic is small, relying solely on the ejector pin to lift the plastic from the bottom may cause excessive force on the bottom of the plastic, resulting in significant damage to the plastic and causing the product to be unqualified. In response to the above problems, the following solutions are proposed. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a multi-station injection molding die, including a lifting assembly, the lifting assembly including a base plate, a top plate fixedly connected to the top of the base plate, and a lower mold fixedly connected to the top of the base plate, and further including:

[0005] The buffer assembly includes a fixed sleeve two fixedly connected to the inner wall of the lower mold, a compression rod two slidably connected to the inner wall of the fixed sleeve two, and an air guide hose one fixedly connected to the outer surface of the fixed sleeve two.

[0006] The sealing assembly includes a limiting block 1 disposed inside the lower mold, a sliding rod 1 slidably connected to the inner wall of the limiting block 1, and a spring 1 sleeved on the outer surface of the sliding rod 1.

[0007] The separation assembly includes a compression rod three disposed inside the lower mold, a support frame slidably connected to the outer surface of the compression rod three, and a spring two sleeved on the outer surface of the compression rod three.

[0008] Preferably, a liquid pump is fixedly connected to the top of the top plate, the bottom of the liquid pump output end penetrates through the top of the top plate and extends to the outside, an upper mold is fixedly connected to the bottom of the liquid pump output end, an injection port is opened at the top of the upper mold, and a compression rod is fixedly connected to the bottom of the upper mold. By setting the compression rod, the air inside the lower mold can be compressed.

[0009] Preferably, the outer surface of the compression rod is slidably connected to the inner wall of the lower mold, and an air guide pipe is fixedly connected to the outer surface of the lower mold. The bottom of the air guide pipe is fixedly connected to the top of the base plate. An air guide cavity is opened inside the base plate. A fixing sleeve is fixedly connected to the bottom of the inner wall of the lower mold. A lifting rod is slidably connected to the inner wall of the fixing sleeve. A lifting plate is fixedly connected to the top of the lifting rod. The outer surface of the lifting plate is slidably connected to the inner wall of the lower mold. By setting the lifting plate, since the contact area between the lifting plate and the plastic is large enough, the bottom of the plastic will not be damaged.

[0010] Preferably, the first air guide hose is fixedly connected to the third fixed sleeve at the end away from the second fixed sleeve. A lifting rod is slidably connected to the inner wall of the third fixed sleeve. A fixed ring is fixedly connected to the outer surface of the lifting rod. A tension rod is fixedly connected to the bottom of the fixed ring. A fifth fixed sleeve is slidably connected to the outer surface of the tension rod. The outer surface of the fifth fixed sleeve is fixedly connected to the outer surface of the third fixed sleeve. The second air guide hose is fixedly connected to the outer surface of the fifth fixed sleeve. The second air guide hose is fixedly connected to the fourth fixed sleeve at the end away from the fifth fixed sleeve. This design can compress the air in the second fixed sleeve and distribute the force to the lifting rod and the tension rod, thereby buffering the lifting plate and preventing the plastic from colliding with the device due to inertia or even falling directly out of the device.

[0011] Preferably, the top of the second fixed sleeve is fixedly connected to the bottom of the lifting plate, the bottom of the first limiting block is fixedly connected to the top of the fourth fixed sleeve, the outer surface of the first sliding rod is slidably connected to the inner wall of the fourth fixed sleeve, the top of the first sliding rod is fixedly connected to the limiting sleeve, and the bottom of the limiting sleeve is fixedly connected to the top of the first spring. By setting the first limiting block, the limiting sleeve plays a supporting and limiting role.

[0012] Preferably, the bottom of the spring is fixedly connected to the outer surface of the limiting block, the outer surface of the limiting sleeve is slidably connected to the inner wall of the limiting block, the inner wall of the limiting sleeve is slidably connected to the sliding rod, a baffle plate is fixedly connected to the sliding rod on the side away from the limiting sleeve, the outer surface of the sliding rod is slidably connected to the limiting block, and the top of the limiting block is fixedly connected to the bottom of the lifting plate. By setting the limiting block, the sliding rod is limited.

[0013] Preferably, the outer surface of the compression rod three is slidably connected to the inner wall of the lifting rod, the outer surface of the support frame is fixedly connected to the inner wall of the lifting rod, the top of the spring two is fixedly connected to the bottom of the support frame, the bottom of the spring two is fixedly connected to the outer surface of the compression rod three, and an airbag is fixedly connected to the top of the lifting rod. The airbag lifts the plastic upward without leaving marks or damage on the bottom of the plastic, thereby preventing the finished plastic from having an unqualified appearance.

[0014] A multi-station injection molding die and its molding method include the following steps:

[0015] S1: When using this device, after the plastic is cooled and molded, the liquid pump is controlled to move the upper mold upward and separate it from the lower mold. During the upward movement of the upper mold, a gradually increasing force is applied to the plastic, causing the plastic to separate from the lower mold.

[0016] S2: When the lifting plate lifts the plastic upwards, the compression rod two will compress the air in the fixing sleeve two and distribute the force to the lifting rod and the tension rod to buffer the lifting plate;

[0017] S3: As the lifting rod moves upward, the baffle will be driven to expose the through hole opened on the lifting plate. When the lifting rod can no longer move upward after moving a certain distance, the airbag will inflate and push the plastic out.

[0018] The present invention has the following beneficial effects:

[0019] (1) During the upward movement of the upper mold, the compression rod moves upward as well. The compression rod compresses the air in the lower mold and directs it into the air guide pipe. The air guide pipe then directs the air into the air guide cavity, which in turn directs it into the fixed sleeve. The air entering the fixed sleeve pushes the lifting rod upward, causing the lifting plate to move upward as well. Since the molded plastic adheres to the inner wall of the lower mold, a significant force may be required to push the plastic. Therefore, before pushing the plastic, it remains stationary. As the upper mold continues to move the compression rod upward, it continuously inputs air into the fixed sleeve. As the air pressure gradually increases, the force exerted on the lifting rod also increases. When the upper mold moves a certain distance, the air pressure becomes sufficient to lift the plastic upwards via the lifting plate. This design uses a gradually increasing force to lift the plastic, separating it from the lower mold for easier material handling. The gradually increasing force also provides a buffer, preventing the plastic from being directly separated from the lower mold by rigid force, which could cause some plastic to stick to the inner wall of the lower mold and result in defective products. Furthermore, the lifting plate, with its large contact area with the plastic, does not damage the bottom of the plastic.

[0020] (2) When the lifting plate lifts the plastic upwards, the air pressure in the first fixed sleeve is relatively high, causing the lifting plate to move upwards by a certain distance instantaneously. Therefore, it is necessary to buffer the lifting plate to prevent the plastic from colliding with the device due to inertia or even falling directly out of the device. Specifically, during the upward movement of the lifting plate, the compression rod 2 will move and compress the air in the second fixed sleeve. The second fixed sleeve will then introduce the air into the third fixed sleeve through the first air guide hose. The air introduced into the third fixed sleeve will provide an upward force to the lifting rod. When the lifting rod moves upwards, it will drive the tension rod upwards through the fixed ring. The upward movement of the tension rod will draw out the air in the fourth fixed sleeve through the second air guide hose and stretch it, thereby buffering and dispersing the force of the lifting plate moving upwards. This design can buffer the lifting plate by compressing the air in the second fixed sleeve and dispersing the force to the lifting rod and the tension rod, thus preventing the plastic from colliding with the device due to inertia or even falling directly out of the device.

[0021] (3) During the upward movement of the tension rod, the air in the fixed sleeve 4 is drawn out through the second air guide hose. Due to the decrease in air pressure, the sliding rod 1 is drawn downward and compresses the spring 1. During the downward movement of the sliding rod 1, the limiting sleeve 1 is moved along with it. During the movement of the limiting sleeve, the sliding rod 2 and the baffle 1 are moved downward together. During the downward movement of the sliding rod 2, due to the combined limiting effect of the limiting sleeve and the limiting block 2, the baffle 1 is moved downward and moves towards the limiting block 1, thereby exposing the through hole opened on the lifting plate and giving the lifting rod space to move upward. During the next injection molding, since the upper mold will move downward again to fit with the lower mold, the baffle 1 will be reset, thereby blocking and sealing the through hole opened on the lifting plate. This design can give the lifting rod space to move upward and can block the plastic in the molten state, preventing the plastic in the molten state from directly contacting the airbag and causing the airbag to be damaged due to high temperature.

[0022] (4) During the upward movement of the lifting rod, the present invention will drive the compression rod three to move upward as well. After the lifting rod moves a certain distance, the top of the fixing ring will contact the bottom of the lifting plate. At this time, the lifting rod can no longer move upward, and the top of the airbag will contact the bottom of the plastic. As the air in the air guide hose one continues to flow into the fixing sleeve three, the compression rod three will overcome the elastic force of the spring two and move upward. The upward movement of the compression rod three will compress the air in the lifting rod and introduce the air into the airbag. The airbag will expand after the air is introduced. The expanded airbag will give the plastic an upward force. When the force of the airbag increases to a certain level, the plastic will be pushed upward and detached from the top of the lifting plate. This design separates the plastic from the lifting plate by expanding the airbag, and the airbag will lift the plastic upward without leaving marks or damage on the bottom of the plastic, thus preventing the finished plastic from having an unqualified appearance. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the internal cross-sectional structure of the mold of the present invention;

[0025] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention;

[0026] Figure 3 This is an exploded three-dimensional structural diagram of the compression rod and the lower mold of the present invention;

[0027] Figure 4 This is a schematic diagram of the internal cross-sectional structure of the mold of the present invention;

[0028] Figure 5 This is a schematic diagram of the overall structure of the lifting rod of the present invention;

[0029] Figure 6 This is a schematic diagram of the overall structure of the limiting block of the present invention;

[0030] Figure 7 This is a schematic diagram of the overall structure of the shielding plate of the present invention;

[0031] Figure 8 This is a schematic diagram of the internal cross-sectional structure of the lifting rod of the present invention;

[0032] Figure 9 This is a schematic diagram of the workflow of the present invention.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] In the diagram: 1. Lifting assembly; 101. Base plate; 102. Top plate; 103. Lower mold; 104. Liquid pump; 105. Upper mold; 106. Injection port; 107. Compression rod one; 108. Air guide pipe; 109. Air guide chamber; 110. Fixing sleeve one; 111. Lifting rod; 112. Lifting plate; 2. Buffer assembly; 201. Fixing sleeve two; 202. Compression rod two; 203. Air guide hose one; 204. Fixing sleeve three; 205. 206. Lifting rod; 207. Fixing ring; 208. Tensioning rod; 209. Air guide hose II; 2000. Fixing sleeve IV; 210. Fixing sleeve V; 3. Sealing assembly; 301. Limiting block I; 302. Sliding rod I; 303. Spring I; 304. Limiting sleeve; 305. Sliding rod II; 306. Baffle plate; 307. Limiting block II; 4. Separation assembly; 401. Compression rod III; 402. Support frame; 403. Spring II; 404. Airbag. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1, please refer to Figure 1 - Figure 3 This invention relates to a multi-station injection molding die, comprising a lifting assembly 1, which includes a base plate 101, a top plate 102 fixedly connected to the top of the base plate 101, and a lower die 103 fixedly connected to the top of the base plate 101. The die also includes:

[0037] Buffer assembly 2 includes a fixed sleeve 201 fixedly connected to the inner wall of the lower mold 103, a compression rod 202 slidably connected to the inner wall of the fixed sleeve 201, and an air guide hose 203 fixedly connected to the outer surface of the fixed sleeve 201.

[0038] Sealing component 3 includes a limiting block 301 disposed inside the lower mold 103, a sliding rod 302 slidably connected to the inner wall of the limiting block 301, and a spring 303 sleeved on the outer surface of the sliding rod 302.

[0039] Separation component 4 includes a compression rod 401 disposed inside the lower mold 103, a support frame 402 slidably connected to the outer surface of the compression rod 401, and a spring 403 sleeved on the outer surface of the compression rod 401.

[0040] A liquid pump 104 is fixedly connected to the top of the top plate 102. The bottom of the output end of the liquid pump 104 passes through the top of the top plate 102 and extends to the outside. An upper mold 105 is fixedly connected to the bottom of the output end of the liquid pump 104. An injection port 106 is opened on the top of the upper mold 105. A compression rod 107 is fixedly connected to the bottom of the upper mold 105.

[0041] The outer surface of the compression rod 107 is slidably connected to the inner wall of the lower mold 103. An air guide pipe 108 is fixedly connected to the outer surface of the lower mold 103. The bottom of the air guide pipe 108 is fixedly connected to the top of the base plate 101. An air guide cavity 109 is provided inside the base plate 101. A fixing sleeve 110 is fixedly connected to the bottom of the inner wall of the lower mold 103. A lifting rod 111 is slidably connected to the inner wall of the fixing sleeve 110. A lifting plate 112 is fixedly connected to the top of the lifting rod 111. The outer surface of the lifting plate 112 is slidably connected to the inner wall of the lower mold 103. As mold 105 moves upward, it drives compression rod 107 to move upward as well. During this upward movement, compression rod 107 compresses the air in lower mold 103 and directs it into air guide pipe 108. Air guide pipe 108 then directs the air into air guide cavity 109, which in turn directs it into fixed sleeve 110. The air entering fixed sleeve 110 pushes lifting rod 111 upward, causing lifting plate 112 to move upward as well. Since the plastic will stick to the inner wall of the lower mold 103 after molding, it may require a large force to push the plastic. Therefore, the plastic is stationary before being pushed. As the upper mold 105 drives the compression rod 107 to continue moving upward to continuously input air into the fixed sleeve 110, the air pressure will gradually increase, and the force applied to the lifting rod 111 will also continue to increase. When the upper mold 105 moves a certain distance, the air pressure is large enough to lift the plastic upward through the lifting plate 112. This design can lift the plastic upward with gradually increasing force, so that the plastic is separated from the lower mold 103, making it convenient for workers to pick up the material. The gradually increasing force can also provide a buffer process, preventing the plastic from being separated from the lower mold 103 by rigid force, which would cause some of the plastic to stick to the inner wall of the lower mold 103, resulting in a defective product. At the same time, the lifting plate 112 lifts the plastic upward. Since the contact area between the lifting plate 112 and the plastic is large enough, it will not damage the bottom of the plastic.

[0042] Example 2, please refer to Figure 4 - Figure 8This invention relates to a multi-station injection molding die. Based on Embodiment 1, a first air guide hose 203 is fixedly connected to a third fixed sleeve 204 at the end furthest from the second fixed sleeve 201. A lifting rod 205 is slidably connected to the inner wall of the third fixed sleeve 204. A fixed ring 206 is fixedly connected to the outer surface of the lifting rod 205. A tension rod 207 is fixedly connected to the bottom of the fixed ring 206. A fifth fixed sleeve 210 is slidably connected to the outer surface of the tension rod 207. The outer surface of the fifth fixed sleeve 210 is fixedly connected to the outer surface of the third fixed sleeve 204. A second air guide hose 208 is fixedly connected to the outer surface of the fifth fixed sleeve 210. A fourth fixed sleeve 209 is fixedly connected to the end of the second air guide hose 208 furthest from the fifth fixed sleeve 210. When the lifting plate 112 lifts the plastic upwards, due to the high air pressure in the first fixed sleeve 110, the lifting plate 112 will instantly move upwards a certain distance. Therefore, it is necessary to buffer the lifting plate 112 to prevent the plastic from collapsing due to inertia. In case of impact or even falling out of the device, the lifting plate 112 moves upward, which in turn moves the compression rod 202, compressing the air in the fixing sleeve 201. The fixing sleeve 201 then introduces the air into the fixing sleeve 304 through the air guide hose 203. The air in the fixing sleeve 304 provides an upward force to the lifting rod 205. When the lifting rod 205 moves upward, it drives the tension rod 207 upward through the fixing ring 206. The upward movement of the tension rod 207 draws out the air from the fixing sleeve 409 through the air guide hose 208 and stretches it, thereby buffering and dispersing the force of the lifting plate 112 moving upward. This design can buffer the lifting plate 112 by compressing the air in the fixing sleeve 201 and dispersing the force to the lifting rod 205 and the tension rod 207, thus preventing the plastic from impacting the device due to inertia or even falling out of the device.

[0043] The top of the second fixed sleeve 201 is fixedly connected to the bottom of the lifting plate 112, the bottom of the first limiting block 301 is fixedly connected to the top of the fourth fixed sleeve 209, the outer surface of the first sliding rod 302 is slidably connected to the inner wall of the fourth fixed sleeve 209, the top of the first sliding rod 302 is fixedly connected to the limiting sleeve 304, and the bottom of the limiting sleeve 304 is fixedly connected to the top of the first spring 303. During the upward movement of the tension rod 207, it will draw out the air from the fourth fixed sleeve 209 through the second air guide hose 208. Due to the decrease in air pressure, the first sliding rod 302 will be drawn downward and compress the first spring 303. During the downward movement of the first sliding rod 302, it will drive the limiting sleeve 304 to move together.

[0044] The bottom of spring 303 is fixedly connected to the outer surface of limit block 301. The outer surface of limit sleeve 304 is slidably connected to the inner wall of limit block 301. A sliding rod 305 is slidably connected to the inner wall of limit sleeve 304. A baffle plate 306 is fixedly connected to the side of sliding rod 305 away from limit sleeve 304. A limit block 307 is slidably connected to the outer surface of sliding rod 305. The top of limit block 307 is fixedly connected to the bottom of lifting plate 112. During the movement of limit sleeve 304, sliding rod 305 and baffle plate 306 will move downward together. During the downward movement of sliding rod 305, due to the combined force of limit sleeve 304 and limit block 307... As a limiting action, the baffle plate 306 is driven downward and moves towards the limiting block 301, thereby exposing the through hole on the lifting plate 112 and providing space for the lifting rod 205 to move upward. During the next injection molding, the upper mold 105 will move downward again to fit with the lower mold 103, so the baffle plate 306 will be reset, thereby blocking and sealing the through hole on the lifting plate 112. This design can provide space for the lifting rod 205 to move upward and can also block the molten plastic to prevent the molten plastic from directly contacting the airbag 404, which would cause the airbag 404 to be damaged due to high temperature.

[0045] The outer surface of compression rod 3 401 is slidably connected to the inner wall of lifting rod 205. The outer surface of support frame 402 is fixedly connected to the inner wall of lifting rod 205. The top of spring 2 403 is fixedly connected to the bottom of support frame 402, and the bottom of spring 2 403 is fixedly connected to the outer surface of compression rod 3 401. An airbag 404 is fixedly connected to the top of lifting rod 205. During the upward movement of lifting rod 205, it will drive compression rod 3 401 to move upward as well. After lifting rod 205 has moved a certain distance, the top of fixing ring 206 will contact the bottom of lifting plate 112. At this time, lifting rod 205 can no longer move upward, while the top of airbag 404 will contact the bottom of plastic. With the air guide hose 203... Air is continuously introduced into the fixed sleeve 204. The compression rod 401 overcomes the elastic force of the spring 403 and moves upward. The upward movement of the compression rod 401 compresses the air in the lifting rod 205 and introduces the air into the airbag 404. The airbag 404 expands and exerts an upward force on the plastic. When the force of the airbag 404 increases to a certain level, the plastic is pushed upward and detaches from the top of the lifting plate 112. This design uses the expansion of the airbag 404 to detach the plastic from the lifting plate 112, and the upward lifting of the plastic by the airbag 404 will not leave marks or damage on the bottom of the plastic, thus preventing the finished plastic from having an unqualified appearance.

[0046] The molding method of this multi-station injection molding die includes the following steps:

[0047] S1: When using this device, after the plastic is cooled and molded, the liquid pump 104 is controlled to move the upper mold 105 upward and separate it from the lower mold 103. During the upward movement of the upper mold 105, a gradually increasing force is applied to the plastic, causing the plastic to separate from the lower mold 103.

[0048] S2: When the lifting plate 112 lifts the plastic upwards, the compression rod 202 will compress the air in the fixing sleeve 201 and distribute the force to the lifting rod 205 and the tension rod 207 to buffer the lifting plate 112.

[0049] S3: During the upward movement of the lifting rod 205, the baffle plate 306 will be driven to expose the through hole opened on the lifting plate 112. When the lifting rod 205 can no longer move upward after moving a certain distance, the airbag 404 will inflate and push out the plastic.

[0050] One specific application of this embodiment is:

[0051] When using this device, first move it to the designated position, then start the liquid pump 104 to press the upper mold 105 down to fit against the lower mold 103. When injection molding is to be performed, molten plastic can be injected into the lower mold 103 through the injection port 106. After the molten plastic cools and solidifies, control the liquid pump 104 to move the upper mold 105 upward to separate it from the lower mold 103. During the upward movement of the upper mold 105, it will drive the compression rod 107 to move upward as well. As the compression rod 107 moves upward, it compresses the air in the lower mold 103 and directs the air from the lower mold 103 into the air guide pipe 108. The air guide pipe 108 then directs the air into the air guide cavity 109, which in turn directs the air into the fixing sleeve 110. The air entering the fixing sleeve 110 pushes the lifting rod 111 upward, causing the lifting plate 112 to move upward as well. Since the molded plastic will adhere to the inner wall of the lower mold 103 at this time... For the plastic to adhere, a relatively large force may be needed to push it. Therefore, the plastic is stationary before it is pushed. As the upper mold 105 drives the compression rod 107 to continue moving upward to continuously input air into the fixed sleeve 110, the air pressure will gradually increase, and the force applied to the lifting rod 111 will also continue to increase. When the upper mold 105 has moved a certain distance, the air pressure is large enough to lift the plastic upward through the lifting plate 112. This design can lift the plastic upward with gradually increasing force, so that the plastic is separated from the lower mold 103, making it convenient for workers to pick up the material. The gradually increasing force can also provide a buffer process, which can prevent the plastic from being separated from the lower mold 103 by a rigid force, which would cause some of the plastic to stick to the inner wall of the lower mold 103, resulting in a defective product. At the same time, the lifting plate 112 lifts the plastic upward. Since the contact area between the lifting plate 112 and the plastic is large enough, it will not damage the bottom of the plastic.

[0052] When the lifting plate 112 lifts the plastic upwards, the air pressure in the fixed sleeve 110 is relatively high at this time, causing the lifting plate 112 to move upwards instantaneously a certain distance. Therefore, it is necessary to cushion the lifting plate 112 to prevent the plastic from colliding with the device due to inertia, or even falling directly out of the device. Specifically, during the upward movement of the lifting plate 112, it will drive the compression rod 202 to move, thereby compressing the air in the fixed sleeve 201. The fixed sleeve 201 will then introduce the air into the fixed sleeve 204 through the air guide hose 203. The air introduced into the fixed sleeve 204 will then contribute to the lifting... The lowering rod 205 provides an upward force. When the lifting rod 205 moves upward, it will drive the tension rod 207 to move upward through the fixing ring 206. The upward movement of the tension rod 207 will draw out the air from the fixing sleeve 209 through the second air guide hose 208 and stretch it, thereby buffering and dispersing the force of the lifting plate 112 moving upward. This design can buffer the lifting plate 112 by compressing the air in the second fixing sleeve 201 and dispersing the force to the lifting rod 205 and the tension rod 207, thus preventing the plastic from colliding with the device due to inertia or even falling directly out of the device.

[0053] As the tension rod 207 moves upward, it draws air out of the fixing sleeve 209 through the air guide hose 208. Due to the reduced air pressure, the sliding rod 302 is drawn downward and compresses the spring 303. During this downward movement, the sliding rod 302 moves the limiting sleeve 304, which in turn moves the sliding rod 305 and the baffle 306 downward. During this downward movement, the sliding rod 305 is limited by the combined limiting effect of the limiting sleeve 304 and the limiting block 307, causing the baffle to... 306 will be driven downwards and move towards the limit block 301, thereby exposing the through hole on the lifting plate 112 and providing space for the lifting rod 205 to move upwards. During the next injection molding, as the upper mold 105 moves downwards again to fit against the lower mold 103, the baffle plate 306 will be reset, thus sealing the through hole on the lifting plate 112. This design provides space for the lifting rod 205 to move upwards and also blocks the molten plastic, preventing it from directly contacting the molten plastic. Contact with airbag 404 causes airbag 404 to be damaged due to high temperature; during the upward movement of lifting rod 205, it will drive compression rod 401 to move upward as well. After the lifting rod 205 moves a certain distance, the top of the fixing ring 206 will contact the bottom of the lifting plate 112. At this time, the lifting rod 205 can no longer move upward, while the top of airbag 404 will contact the bottom of the plastic. As air in the air guide hose 203 continues to flow into the fixing sleeve 204, the compression rod 401 will overcome the elastic force of spring 403 and move upward. When the retractor rod 401 moves upward, it compresses the air in the lifting rod 205 and introduces the air into the airbag 404. The airbag 404 expands and exerts an upward force on the plastic. When the force of the airbag 404 increases to a certain level, the plastic is pushed upward and detaches from the top of the lifting plate 112. This design uses the expansion of the airbag 404 to detach the plastic from the lifting plate 112, and the upward lifting of the plastic by the airbag 404 will not leave marks or damage on the bottom of the plastic, thus preventing the finished plastic from having an unqualified appearance.

[0054] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-station injection molding die, comprising a lifting assembly (1), the lifting assembly (1) comprising a base plate (101), a top plate (102) fixedly connected to the top of the base plate (101), and a lower mold (103) fixedly connected to the top of the base plate (101), characterized in that, Also includes: The buffer assembly (2) includes a fixed sleeve two (201) fixedly connected to the inner wall of the lower mold (103), a compression rod two (202) slidably connected to the inner wall of the fixed sleeve two (201), and an air guide hose one (203) fixedly connected to the outer surface of the fixed sleeve two (201). The sealing assembly (3) includes a limiting block (301) disposed inside the lower mold (103), a sliding rod (302) slidably connected to the inner wall of the limiting block (301), and a spring (303) sleeved on the outer surface of the sliding rod (302). The separation component (4) includes a compression rod three (401) disposed inside the lower mold (103), a support frame (402) is slidably connected to the outer surface of the compression rod three (401), and a spring two (403) is sleeved on the outer surface of the compression rod three (401). A liquid pump (104) is fixedly connected to the top of the top plate (102). The bottom of the output end of the liquid pump (104) penetrates the top of the top plate (102) and extends to the outside. An upper mold (105) is fixedly connected to the bottom of the output end of the liquid pump (104). An injection port (106) is opened on the top of the upper mold (105). A compression rod (107) is fixedly connected to the bottom of the upper mold (105). The outer surface of the compression rod (107) is slidably connected to the inner wall of the lower mold (103). An air guide pipe (108) is fixedly connected to the outer surface of the lower mold (103). The bottom of the air guide pipe (108) is fixedly connected to the top of the base plate (101). An air guide cavity (109) is opened inside the base plate (101). A fixing sleeve (110) is fixedly connected to the bottom of the inner wall of the lower mold (103). A lifting rod (111) is slidably connected to the inner wall of the fixing sleeve (110). A lifting plate (112) is fixedly connected to the top of the lifting rod (111). The outer surface of the lifting plate (112) is slidably connected to the inner wall of the lower mold (103). The first air guide hose (203) is fixedly connected to the third fixed sleeve (204) at the end away from the second fixed sleeve (201). The inner wall of the third fixed sleeve (204) is slidably connected to the lifting rod (205). The outer surface of the lifting rod (205) is fixedly connected to the fixing ring (206). The bottom of the fixing ring (206) is fixedly connected to the tension rod (207). The outer surface of the tension rod (207) is slidably connected to the fifth fixed sleeve (210). The outer surface of the fifth fixed sleeve (210) is fixedly connected to the outer surface of the third fixed sleeve (204). The outer surface of the fifth fixed sleeve (210) is fixedly connected to the second air guide hose (208). The second air guide hose (208) is fixedly connected to the fourth fixed sleeve (209) at the end away from the fifth fixed sleeve (210).

2. The multi-station injection molding die according to claim 1, characterized in that: The top of the second fixed sleeve (201) is fixedly connected to the bottom of the lifting plate (112), the bottom of the first limiting block (301) is fixedly connected to the top of the fourth fixed sleeve (209), the outer surface of the first sliding rod (302) is slidably connected to the inner wall of the fourth fixed sleeve (209), the top of the first sliding rod (302) is fixedly connected to the limiting sleeve (304), and the bottom of the limiting sleeve (304) is fixedly connected to the top of the first spring (303).

3. A multi-station injection molding die according to claim 2, characterized in that: The bottom of the spring (303) is fixedly connected to the outer surface of the limiting block (301), the outer surface of the limiting sleeve (304) is slidably connected to the inner wall of the limiting block (301), the inner wall of the limiting sleeve (304) is slidably connected to the sliding rod (305), the sliding rod (305) is fixedly connected to the baffle plate (306) on the side away from the limiting sleeve (304), the outer surface of the sliding rod (305) is slidably connected to the limiting block (307), and the top of the limiting block (307) is fixedly connected to the bottom of the lifting plate (112).

4. A multi-station injection molding die according to claim 3, characterized in that: The outer surface of the compression rod three (401) is slidably connected to the inner wall of the lifting rod (205), the outer surface of the support frame (402) is fixedly connected to the inner wall of the lifting rod (205), the top of the spring two (403) is fixedly connected to the bottom of the support frame (402), the bottom of the spring two (403) is fixedly connected to the outer surface of the compression rod three (401), and an airbag (404) is fixedly connected to the top of the lifting rod (205).

5. The multi-station injection molding die according to claim 4, characterized in that, The molding method of the injection molding mold includes the following steps: S1: When using this device, after the plastic is cooled and formed, the liquid pump (104) is controlled to move the upper mold (105) upward and separate it from the lower mold (103). During the upward movement of the upper mold (105), a gradually increasing force is applied to the plastic, causing the plastic to separate from the lower mold (103). S2: When the lifting plate (112) lifts the plastic upward, the compression rod two (202) will compress the air in the fixing sleeve two (201) and distribute the force to the lifting rod (205) and the tension rod (207) to buffer the lifting plate (112); S3: During the upward movement of the lifting rod (205), the baffle plate (306) will be driven to expose the through hole opened on the lifting plate (112). When the lifting rod (205) can no longer move upward after moving a certain distance, the airbag (404) will expand and push out the plastic.

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