Multi-station injection molding mold and molding method thereof

Abstract

The invention relates to the technical field of injection molding, and discloses a multi-station injection molding mold and a molding method thereof.The multi-station injection molding mold comprises a jacking assembly, the jacking assembly comprises a bottom plate, in the upward moving process of an upper mold, the upper mold can drive a first compression rod to move upwards, and in the upward moving process of the first compression rod, air in a lower mold can be compressed; when the plastic is pushed, the jacking rod is pushed upwards, the jacking rod drives the jacking plate to move upwards together, the formed plastic is adhered to the inner wall of the lower mold at the moment, and large force is possibly needed to push the plastic, so that the plastic is in a static state before being pushed; when the upper mold drives the first compression rod to continuously move upwards so as to continuously input air into the first fixing sleeve, the air pressure can be gradually increased, the force applied to the jacking rod can also be continuously increased, after the upper mold moves by a certain distance, the force of the air pressure is large enough, and then the plastic can be jacked upwards through the jacking plate.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to a multi-station injection molding mold and a molding method thereof. Background Art

[0002] The plastic is first heated and melted in the heated barrel of the injection molding machine, and then, pushed by the screw or piston of the injection molding machine, enters the mold cavity through the nozzle and the pouring system of the mold, and finally hardens and takes shape in the cavity. This is the simple process of injection molding. During the demolding process, since the plastic easily adheres to the inner wall of the mold, demolding is difficult, so structures such as ejectors are required to eject the molded plastic.

[0003] However, since the four sides of the plastic will stick to the inner wall of the mold and the contact area between the ejector and the plastic is small, relying solely on the ejector to lift the plastic from the bottom may cause excessive force on the bottom of the plastic, thereby causing obvious damage to the plastic and resulting in unqualified products. To address the above problems, the following solutions are proposed. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a multi-station injection molding mold, including a lifting assembly, the lifting assembly includes a bottom plate, the top of the bottom plate is fixedly connected to the top plate, the top of the bottom plate is fixedly connected to the lower mold, and also includes:

[0005] A buffer assembly, the buffer assembly comprises a fixed sleeve 2 fixedly connected to the inner wall of the lower mold, a compression rod 2 is slidably connected to the inner wall of the fixed sleeve 2, and an air guide hose 1 is fixedly connected to the outer surface of the fixed sleeve 2;

[0006] The sealing assembly comprises a limit block 1 arranged inside the lower mold, the inner wall of the limit block 1 is slidably connected with a sliding rod 1, and the outer surface of the sliding rod 1 is sleeved with a spring 1;

[0007] The separation component comprises a compression rod three arranged inside the lower mold, the outer surface of the compression rod three is slidably connected with a support frame, and the outer surface of the compression rod three is sleeved with a spring two.

[0008] Preferably, a liquid pump is fixedly connected to the top of the top plate, the bottom of the liquid pump output end passes through the top of the top plate and extends to the outside, the bottom of the liquid pump output end is fixedly connected to an upper mold, an injection port is provided at the top of the upper mold, and a compression rod 1 is fixedly connected to the bottom of the upper mold. By setting the compression rod 1, the air inside the lower mold can be compressed.

[0009] Preferably, an outer surface of a compression rod is slidably connected to an inner wall of the lower mold, an air guide tube is fixedly connected to the outer surface of the lower mold, the bottom of the air guide tube is fixedly connected to the top of the base plate, an air guide cavity is opened inside the base plate, a fixed 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 fixed sleeve, a lifting plate is fixedly connected to the top of the lifting rod, and 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 air guide hose 1 is fixedly connected to a fixed sleeve 3 at the end away from the fixed sleeve 2, the inner wall of the fixed sleeve 3 is slidably connected to a lifting rod, the outer surface of the lifting rod is fixedly connected to a fixed ring, the bottom of the fixed ring is fixedly connected to a stretching rod, the outer surface of the stretching rod is slidably connected to a fixed sleeve 5, the outer surface of the fixed sleeve 5 is fixedly connected to the outer surface of the fixed sleeve 3, the outer surface of the fixed sleeve 5 is fixedly connected to the air guide hose 2, and the air guide hose 2 is fixedly connected to a fixed sleeve 4 at the end away from the fixed sleeve 5. This design can compress the air in the fixed sleeve 2 and disperse the force to the lifting rod and the stretching rod, thereby preventing the plastic from colliding with the device due to inertia, or even falling out of the device directly.

[0011] Preferably, the top of the fixed sleeve 2 is fixedly connected to the bottom of the jacking plate, the bottom of the limit block 1 is fixedly connected to the top of the fixed sleeve 4, the outer surface of the sliding rod 1 is slidably connected to the inner wall of the fixed sleeve 4, the top of the sliding rod 1 is fixedly connected to the limit sleeve, and the bottom of the limit sleeve is fixedly connected to the top of the spring 1. By setting the limit block 1, the limit sleeve is supported and limited.

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

[0013] Preferably, the third outer surface of the compression rod 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 second spring is fixedly connected to the bottom of the support frame, the bottom of the second spring is fixedly connected to the third outer surface of the compression rod, and the top of the lifting rod is fixedly connected with an airbag, which can lift the plastic upward without leaving any marks or damage on the bottom of the plastic, thereby preventing the appearance of the finished plastic from being unqualified.

[0014] A multi-station injection molding mold and a molding method thereof, comprising the following steps:

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

[0016] S2: When the lifting plate pushes the plastic upward, the compression rod 2 will compress the air in the fixed sleeve 2 and distribute the force to the lifting rod and the stretching rod to buffer the lifting plate;

[0017] S3: When the lifting rod moves upward, the shielding plate will be driven to expose the through hole opened on the lifting plate. When the lifting rod moves a certain distance and cannot move upward any further, the airbag will expand to push the plastic out.

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

[0019] (1) In the process of the upper mold moving upward, the present invention will drive the compression rod to move upward together. In the process of the compression rod moving upward, the air in the lower mold will be compressed and the air in the lower mold will be passed into the air guide tube. The air guide tube will pass the air into the air guide cavity. The air guide cavity will pass the air into the fixed sleeve. The air passed into the fixed sleeve will push the lifting rod upward. The lifting rod will drive the lifting plate to move upward together. Since the plastic will adhere to the inner wall of the lower mold after molding, it may take a large force to push the plastic. Therefore, before pushing the plastic, the plastic is in a stationary state. As the upper mold drives the compression rod to continue to move upward to continuously input air into the fixed sleeve, the plastic will be pushed upward. Air, the air pressure will gradually increase, and the force applied to the lifting rod will continue to increase. When the upper mold moves a certain distance, the air pressure force is large enough, and the plastic can be lifted up through the lifting plate. This design can lift the plastic upward through gradually increasing force, so that the plastic is separated from the lower mold, which is convenient for the staff to take the material. The gradually increasing force can provide a buffer process to prevent the plastic from being directly separated from the lower mold by rigid force, resulting in part of the plastic sticking to the inner wall of the lower mold, causing the finished product to be unqualified. At the same time, the plastic is lifted upward by the lifting plate. Since the contact area between the lifting plate and the plastic is large enough, it will not cause damage to the bottom of the plastic.

[0020] (2) In the present invention, when the lifting plate lifts the plastic upward, the lifting plate will instantly move upward a certain distance due to the high pressure of the air in the fixed sleeve 1 at this time. Therefore, it is necessary to buffer the lifting plate to prevent the plastic from colliding with the device due to inertia or even falling out of the device directly. Specifically, when the lifting plate moves upward, it will drive the compression rod 2 to move and compress the air in the fixed sleeve 2. The fixed sleeve 2 will pass the air into the fixed sleeve 3 through the air guide hose 1. The air passed into the fixed sleeve 3 will provide an upward force to the lifting rod. When the lifting rod moves upward, it will drive the stretching rod to move upward through the fixed ring. The upward movement of the stretching rod will suck out the air in the fixed sleeve 4 through the air guide hose 2 and stretch it, thereby buffering and dispersing the force of the lifting plate moving upward. This design can compress the air in the fixed sleeve 2 and disperse the force to the lifting rod and the stretching rod, thereby buffering the lifting plate and preventing the plastic from colliding with the device due to inertia or even falling out of the device directly.

[0021] (3) In the process of the stretching rod of the present invention moving upward, it will suck out the air in the fixed sleeve four through the air guide hose two. Due to the reduction of air pressure, the sliding rod one will be sucked downward and compress the spring one. In the process of the sliding rod one moving downward, it will drive the limit sleeve one to move together. In the process of the movement, the limit sleeve will drive the sliding rod two and the shielding plate one to move downward together. In the process of the sliding rod two moving downward, due to the common limiting effect of the limit sleeve and the limit block two, the shielding plate will be driven downward and move in the direction close to the limit block one, thereby exposing the through hole opened on the lifting plate, giving the lifting rod space to move upward. When the next injection molding is performed, since the upper mold will move downward again and fit the lower mold, the shielding plate will be reset, thereby shielding and sealing the through hole opened on the lifting plate. This design can give the lifting rod space to move upward when it moves upward, and can shield the plastic in a molten state to prevent the plastic in a molten state from directly contacting the airbag and causing the airbag to be damaged due to high temperature.

[0022] (4) In the process of the lifting rod moving upward, the present invention will drive the compression rod three to move upward together. When 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 pass 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 pass the air into the airbag. The air-filled airbag will expand, and the expanded airbag will give the plastic an upward force. When the force of the airbag increases to a certain extent, the plastic will be pushed upward and detached from the top of the lifting plate. This design detaches the plastic from the lifting plate by the expansion of the airbag, and the plastic is lifted upward by the airbag without leaving marks or damage on the bottom of the plastic, thereby preventing the appearance of the finished plastic from being unqualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

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

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

[0026] Figure 3 It is a schematic diagram of the exploded three-dimensional structure 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 lower mold of the present invention;

[0028] Figure 5 It 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 a limit 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] Fig. 9 It is a schematic diagram of the working process of the present invention.

[0033] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0034] In the figure: 1. Lifting assembly; 101. Bottom plate; 102. Top plate; 103. Lower mold; 104. Liquid pump; 105. Upper mold; 106. Injection port; 107. Compression rod 1; 108. Air guide tube; 109. Air guide cavity; 110. Fixed sleeve 1; 111. Lifting rod; 112. Lifting plate; 2. Buffer assembly; 201. Fixed sleeve 2; 202. Compression rod 2; 203. Air guide hose 1; 204. Fixed sleeve 3; 205. Lifting rod; 206, fixing ring; 207, stretching rod; 208, air guide hose 2; 209, fixing sleeve 4; 210, fixing sleeve 5; 3, sealing assembly; 301, limit block 1; 302, sliding rod 1; 303, spring 1; 304, limit sleeve; 305, sliding rod 2; 306, baffle plate; 307, limit block 2; 4, separation assembly; 401, compression rod 3; 402, support frame; 403, spring 2; 404, airbag. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] For example, see Figure 1 - Figure 3 The present invention is a multi-station injection molding mold, comprising a lifting assembly 1, the lifting assembly 1 comprising a bottom plate 101, a top plate 102 fixedly connected to the top of the bottom plate 101, a lower mold 103 fixedly connected to the top of the bottom plate 101, and further comprising:

[0037] The buffer assembly 2 includes a second fixing sleeve 201 fixedly connected to the inner wall of the lower mold 103, a second compression rod 202 is slidably connected to the inner wall of the second fixing sleeve 201, and an air guide hose 1 203 is fixedly connected to the outer surface of the second fixing sleeve 201;

[0038] The sealing component 3 includes a limit block 301 disposed inside the lower mold 103, the inner wall of the limit block 301 is slidably connected to a sliding rod 302, and the outer surface of the sliding rod 302 is sleeved with a spring 303;

[0039] The separation component 4 includes a compression rod 3 401 arranged inside the lower mold 103, the outer surface of the compression rod 3 401 is slidably connected to a support frame 402, and the outer surface of the compression rod 3 401 is sleeved with a spring 2 403.

[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 provided at 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, the outer surface of the lower mold 103 is fixedly connected to an air guide tube 108, the bottom of the air guide tube 108 is fixedly connected to the top of the bottom plate 101, and an air guide cavity 109 is opened inside the bottom plate 101. The bottom of the inner wall of the lower mold 103 is fixedly connected to a fixed sleeve 110, and the inner wall of the fixed sleeve 110 is slidably connected to a lifting rod 111, and the top of the lifting rod 111 is fixedly connected to a lifting plate 112, and the outer surface of the lifting plate 112 is slidably connected to the inner wall of the lower mold 103. During the upward movement of the mold 105, the compression rod 107 is driven to move upward together. During the upward movement of the compression rod 107, the air in the lower mold 103 is compressed and the air in the lower mold 103 is passed into the air guide pipe 108. The air guide pipe 108 passes the air into the air guide cavity 109. The air guide cavity 109 passes the air into the fixed sleeve 110. The air passed into the fixed sleeve 110 pushes the lifting rod 111 upward. The lifting rod 111 drives the lifting plate 112 to move upward together. Since the plastic will adhere to the inner wall of the lower mold 103 after molding, it may take a large force to push the plastic. Therefore, before pushing the plastic, the plastic is in a stationary state. As the upper mold 105 drives the compression rod 107 to continue to move 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, and the plastic can be lifted up by the lifting plate 112. This design can lift the plastic upward by gradually increasing force, so that the plastic is separated from the lower mold 103, which is convenient for the staff to take the material. The gradually increasing force can provide a buffer process, which can prevent the plastic from being directly separated from the lower mold 103 by a rigid force, resulting in part of the plastic sticking to the inner wall of the lower mold 103, causing the finished product to be unqualified. At the same time, the plastic is lifted upward by the lifting plate 112. Since the contact area between the lifting plate 112 and the plastic is large enough, the bottom of the plastic will not be damaged.

[0042] For example 2, please refer to Figure 4 - Figure 8The present invention is a multi-station injection molding mold. On the basis of the first embodiment, the air guide hose 1 203 is fixedly connected with a fixed sleeve 3 204 at one end away from the fixed sleeve 201, and the inner wall of the fixed sleeve 3 204 is slidably connected with a lifting rod 205. The outer surface of the lifting rod 205 is fixedly connected with a fixing ring 206, and the bottom of the fixing ring 206 is fixedly connected with a stretching rod 207. The outer surface of the stretching rod 207 is slidably connected with a fixing sleeve 5 210. The outer surface of the fixing sleeve 5 210 is fixedly connected with the outer surface of the fixing sleeve 3 204, and the outer surface of the fixing sleeve 5 210 is fixedly connected with an air guide hose 208. The air guide hose 208 is fixedly connected with a fixing sleeve 4 209 at one end away from the fixing sleeve 5 210. When the lifting plate 112 lifts the plastic upward, since the air pressure in the fixed sleeve 1 10 is relatively large at this time, the lifting plate 112 will instantly move upward a certain distance. Therefore, it is necessary to buffer the lifting plate 112 to prevent the plastic from being in contact with the mounting due to the effect of inertia. The lifting plate 112 is preferably a plastic material with a plurality of ribs 206 disposed on the upper surface of the plastic sleeve 205. The lifting plate 112 is preferably a plastic material with a plurality of ribs 207 disposed on the upper surface of the plastic sleeve 205. The lifting plate 112 is preferably a plastic material with a plurality of ribs 206 disposed on the upper surface of the plastic sleeve 205. The lifting plate 112 is preferably a plastic material with a plurality of ribs 206 disposed on the upper surface of the plastic sleeve 205.

[0043] The top of the fixed sleeve 201 is fixedly connected to the bottom of the jacking plate 112, the bottom of the limit block 301 is fixedly connected to the top of the fixed sleeve 4 209, the outer surface of the sliding rod 302 is slidably connected to the inner wall of the fixed sleeve 4 209, the top of the sliding rod 302 is fixedly connected to the limit sleeve 304, and the bottom of the limit sleeve 304 is fixedly connected to the top of the spring 1 303. During the upward movement of the stretching rod 207, it will suck out the air in the fixed sleeve 4 209 through the air guide hose 208. Due to the decrease in air pressure, the sliding rod 1 302 will be sucked downward and compress the spring 1 303. During the downward movement of the sliding rod 1 302, it will drive the limit sleeve 304 to move together.

[0044] The bottom of spring 1 303 is fixedly connected to the outer surface of limit block 1 301, the outer surface of limit sleeve 304 is slidably connected to the inner wall of limit block 1 301, the inner wall of limit sleeve 304 is slidably connected to sliding rod 2 305, the sliding rod 2 305 is fixedly connected to the side away from the limit sleeve 304 with a shielding plate 306, the outer surface of sliding rod 2 305 is slidably connected to limit block 2 307, the top of limit block 2 307 is fixedly connected to the bottom of jacking plate 112, the limit sleeve 304 will drive sliding rod 2 305 and shielding plate 306 to move downward during the movement, and the sliding rod 2 305 will move downward due to the joint movement of limit sleeve 304 and limit block 2 307 during the downward movement Due to the limiting effect, the shielding plate 306 will be driven downward and move toward the direction close to the limiting block 301, thereby exposing the through hole opened on the lifting plate 112, giving the lifting rod 205 space to move upward. When performing the next injection molding, since the upper mold 105 will move downward again to fit the lower mold 103, the shielding plate 306 will be reset, and then the through hole opened on the lifting plate 112 will be blocked and sealed. This design can give the lifting rod 205 space to move upward when it moves upward, and can block the plastic in the molten state to prevent the plastic in the molten state from directly contacting the airbag 404, causing the airbag 404 to be damaged due to high temperature.

[0045] The outer surface of the compression rod 3 401 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 2 403 is fixedly connected to the bottom of the support frame 402, the bottom of the spring 2 403 is fixedly connected to the outer surface of the compression rod 3 401, and the top of the lifting rod 205 is fixedly connected with the air bag 404. When the lifting rod 205 moves upward, it will drive the compression rod 3 401 to move upward together. When 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, and the top of the air bag 404 will contact the plastic bottom. As the air guide hose 1 203 The air in the plastic is continuously passed into the fixed sleeve three 204, the compression rod three 401 will overcome the elastic force of the spring two 403 and move upward. The upward movement of the compression rod three 401 will compress the air in the lifting rod 205 and pass the air into the airbag 404. The air-filled airbag 404 will expand, and the expanded airbag 404 will give the plastic an upward force. When the force of the airbag 404 increases to a certain extent, the plastic will be pushed upward and separated from the top of the lifting plate 112. This design separates the plastic from the lifting plate 112 through the expansion of the airbag 404, and the plastic is lifted upward by the airbag 404 without leaving any marks or damage on the bottom of the plastic, thereby preventing the appearance of the finished plastic from being unqualified.

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

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

[0048] S2: When the lifting plate 112 lifts the plastic upward, the compression rod 202 compresses the air in the fixing sleeve 201 and distributes the force to the lifting rod 205 and the stretching rod 207, so as to buffer the lifting plate 112;

[0049] S3: When the lifting rod 205 moves upward, the shielding plate 306 will be driven to expose the through hole on the lifting plate 112. When the lifting rod 205 moves a certain distance and cannot move upward any further, the airbag 404 will expand to push the plastic out.

[0050] A specific application of this embodiment is:

[0051] When using the device, first move the device to a designated position, then start the liquid pump 104 to press the upper mold 105 down to fit with the lower mold 103. When injection molding is to be performed, the molten plastic can be injected into the lower mold 103 from the injection port 106. After the molten plastic is cooled and formed, the liquid pump 104 is controlled to move the upper mold 105 upward and separate from the lower mold 103. During the upward movement of the upper mold 105, it drives the compression rod 107 to move upward together. The compression rod 107 moves upward, and the air in the lower mold 103 is compressed, and the air in the lower mold 103 is passed into the air guide pipe 108, and the air guide pipe 108 passes the air into the air guide cavity 109, and the air guide cavity 109 passes the air into the fixed sleeve 110, and the air passed into the fixed sleeve 110 pushes the lifting rod 111 upward, and the lifting rod 111 drives the lifting plate 112 to move upward together. At this time, the plastic after molding will be against the inner wall of the lower mold 103. The plastic may be sticky and may require a large force to push the plastic. Therefore, before pushing the plastic, the plastic is in a stationary state. As the upper mold 105 drives the compression rod 107 to continue to move 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, and the plastic can be lifted up by the lifting plate 112. This design can lift the plastic upward by gradually increasing force, so that the plastic is separated from the lower mold 103, which is convenient for the staff to take the material. The gradually increasing force can provide a buffer process, which can prevent the plastic from being directly separated from the lower mold 103 by rigid force, resulting in part of the plastic sticking to the inner wall of the lower mold 103, causing the finished product to be unqualified. At the same time, the plastic is lifted upward by the lifting plate 112. Since the contact area between the lifting plate 112 and the plastic is large enough, the bottom of the plastic will not be damaged.

[0052] When the lifting plate 112 lifts the plastic upward, the lifting plate 112 will instantly move upward a certain distance because the air pressure in the fixed sleeve 110 is relatively large at this time. Therefore, it is necessary to buffer the lifting plate 112 to prevent the plastic from colliding with the device due to inertia or even falling out of the device directly. Specifically, when the lifting plate 112 moves upward, it will drive the compression rod 202 to move and compress the air in the fixed sleeve 201. The fixed sleeve 201 will pass the air into the fixed sleeve 3 204 through the air guide hose 1 203. The air passed into the fixed sleeve 3 204 will have an impact on the lifting plate 112. The lowering rod 205 provides an upward force. When the lifting rod 205 moves upward, it drives the stretching rod 207 to move upward through the fixing ring 206. The stretching rod 207 moves upward and absorbs the air in the fixing sleeve 4 209 through the air guide hose 208 and stretches it, so as to buffer and disperse the force of the lifting plate 112 moving upward. This design can compress the air in the fixing sleeve 201 and disperse the force to the lifting rod 205 and the stretching rod 207, thereby playing a buffering role for the lifting plate 112, preventing the plastic from colliding with the device due to inertia, or even falling out of the device directly;

[0053] When the stretching rod 207 moves upward, it will suck out the air in the fixing sleeve 4 209 through the air guide hose 208. Due to the decrease in air pressure, the sliding rod 1 302 will be sucked downward and compress the spring 1 303. When the sliding rod 1 302 moves downward, it will drive the limiting sleeve 304 to move together. When the limiting sleeve 304 moves, it will drive the sliding rod 2 305 and the shielding plate 306 to move downward together. When the sliding rod 2 305 moves downward, due to the joint limiting effect of the limiting sleeve 304 and the limiting block 2 307, the shielding plate 306 will be driven downward and move toward the direction close to the limit block 301, thereby exposing the through hole opened on the lifting plate 112, giving the lifting rod 205 space to move upward. During the next injection molding, since the upper mold 105 will move downward again to fit the lower mold 103, the shielding plate 306 will be reset, thereby shielding and sealing the through hole opened on the lifting plate 112. This design can provide space for the lifting rod 205 to move upward when it moves upward, and can shield the molten plastic to prevent the molten plastic from directly The lifting rod 205 is in contact with the airbag 404, causing the airbag 404 to be damaged due to high temperature. In the process of the lifting rod 205 moving upward, it will drive the compression rod 3 401 to move upward together. When 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, and the top of the airbag 404 will contact the plastic bottom. As the air in the air guide hose 1 203 continues to flow into the fixing sleeve 3 204, the compression rod 3 401 will overcome the elastic force of the spring 2 403 and move upward, compressing The upward movement of the retracted rod 401 will compress the air in the lifting rod 205 and pass the air into the airbag 404. The air-filled airbag 404 will expand, and the expanded airbag 404 will give the plastic an upward force. When the force of the airbag 404 increases to a certain level, the plastic will be pushed upward and separated from the top of the lifting plate 112. This design separates the plastic from the lifting plate 112 through the expansion of the airbag 404, and the plastic is lifted upward by the airbag 404 without leaving any marks or damage on the bottom of the plastic, thereby preventing the appearance of the finished plastic from being unqualified.

[0054] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-station injection molding mold, comprising a lifting assembly (1), wherein the lifting assembly (1) comprises a bottom plate (101), a top plate (102) is fixedly connected to the top of the bottom plate (101), and a lower mold (103) is fixedly connected to the top of the bottom plate (101), characterized in that: Also includes: A buffer assembly (2), the buffer assembly (2) comprising a second fixing sleeve (201) fixedly connected to the inner wall of the lower mold (103), a second compression rod (202) being slidably connected to the inner wall of the second fixing sleeve (201), and a first air guide hose (203) being fixedly connected to the outer surface of the second fixing sleeve (201); A sealing assembly (3), the sealing assembly (3) comprising a limit block (301) arranged inside the lower mold (103), the inner wall of the limit block (301) being slidably connected to a sliding rod (302), and the outer surface of the sliding rod (302) being sleeved with a spring (303); A separation component (4), the separation component (4) comprises a compression rod three (401) arranged inside the lower mold (103), the outer surface of the compression rod three (401) is slidably connected to a support frame (402), and the outer surface of the compression rod three (401) is sleeved with a spring two (403).

2. A multi-station injection molding mold according to claim 1, characterized in that: 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 provided at the top of the upper mold (105); and a compression rod (107) is fixedly connected to the bottom of the upper mold (105).

3. A multi-station injection molding mold according to claim 2, characterized in that: The outer surface of the compression rod 1 (107) is slidably connected to the inner wall of the lower mold (103); the outer surface of the lower mold (103) is fixedly connected to an air guide tube (108); the bottom of the air guide tube (108) is fixedly connected to the top of the bottom plate (101); an air guide cavity (109) is provided inside the bottom plate (101); the bottom of the inner wall of the lower mold (103) is fixedly connected to a fixing sleeve 1 (110); the inner wall of the fixing sleeve 1 (110) is slidably connected to a lifting rod (111); the top of the lifting rod (111) is fixedly connected to a lifting plate (112); the outer surface of the lifting plate (112) is slidably connected to the inner wall of the lower mold (103).

4. A multi-station injection molding mold according to claim 3, characterized in that: The air guide hose 1 (203) is fixedly connected to a fixed sleeve 3 (204) at one end away from the fixed sleeve 2 (201); the inner wall of the fixed sleeve 3 (204) is slidably connected to a lifting rod (205); the outer surface of the lifting rod (205) is fixedly connected to a fixing ring (206); the bottom of the fixing ring (206) is fixedly connected to a stretching rod (207); the outer surface of the stretching rod (207) is slidably connected to a fixing sleeve 5 (210); the outer surface of the fixing sleeve 5 (210) is fixedly connected to the outer surface of the fixing sleeve 3 (204); the outer surface of the fixing sleeve 5 (210) is fixedly connected to an air guide hose 2 (208); the air guide hose 2 (208) is fixedly connected to a fixing sleeve 4 (209) at one end away from the fixing sleeve 5 (210).

5. The multi-station injection molding mold according to claim 4, characterized in that: The top of the fixed sleeve 2 (201) is fixedly connected to the bottom of the lifting plate (112), the bottom of the limit block 1 (301) is fixedly connected to the top of the fixed sleeve 4 (209), the outer surface of the sliding rod 1 (302) is slidably connected to the inner wall of the fixed sleeve 4 (209), the top of the sliding rod 1 (302) is fixedly connected to the limit sleeve (304), and the bottom of the limit sleeve (304) is fixedly connected to the top of the spring 1 (303).

6. The multi-station injection molding mold according to claim 5, characterized in that: The bottom of the spring one (303) is fixedly connected to the outer surface of the limit block one (301), the outer surface of the limit sleeve (304) is slidably connected to the inner wall of the limit block one (301), the inner wall of the limit sleeve (304) is slidably connected to a sliding rod two (305), the sliding rod two (305) is fixedly connected to a shielding plate (306) on a side away from the limit sleeve (304), the outer surface of the sliding rod two (305) is slidably connected to the limit block two (307), and the top of the limit block two (307) is fixedly connected to the bottom of the lifting plate (112).

7. The multi-station injection molding mold according to claim 6, 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 the top of the lifting rod (205) is fixedly connected with an air bag (404).

8. The multi-station injection molding mold according to claim 7, characterized in that: The molding method of the injection molding mold comprises the following steps: S1: When the device is used, after the plastic is cooled and formed, the liquid pump (104) is controlled to move the upper mold (105) upward to separate from the lower mold (103). During the upward movement of the upper mold (105), a gradually increasing force is applied to the plastic, so that the plastic is separated from the lower mold (103); S2: When the lifting plate (112) lifts the plastic upward, the compression rod (202) compresses the air in the fixing sleeve (201) and distributes the force to the lifting rod (205) and the stretching rod (207), thereby buffering the lifting plate (112); S3: When the lifting rod (205) moves upward, the shielding plate (306) will be driven to expose the through hole opened on the lifting plate (112). When the lifting rod (205) moves a certain distance and cannot move upward any further, the airbag (404) will expand to push out the plastic.

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