Precision mold for injection molding of panel shell

Abstract

The invention relates to a panel shell injection molding precision mold, and belongs to the technical field of injection molds. Comprising a movable mold plate and a fixed mold plate, a movable mold core plate is arranged in the movable mold plate, a fixed mold core plate is arranged in the fixed mold plate, the movable mold core plate and the fixed mold core plate form a mold cavity, a first injection molding hole is formed in the movable mold plate, a first cavity is formed between the movable mold plate and the movable mold core plate, a second injection molding hole is formed in the movable mold core plate, and a hole sleeve assembly is arranged in the first cavity. A first sealing frame is arranged at the bottom of the hole sleeve assembly; a positioning block and a driving assembly are arranged on the fixed mold core plate, threads are arranged on the positioning block, a demolding plate is arranged in the fixed mold plate, and an air bag is arranged at the bottom of the demolding plate; a lifting part is arranged at the top of the movable template. According to the flat plate shell injection molding precision mold, the mold structure is simplified, the injection molding precision is improved, the demolding process is optimized, the sealing performance is enhanced, the thread length is flexibly controlled, and the air pressure in the mold cavity is stabilized, so that the manufacturing cost is remarkably reduced, and the production efficiency and the product quality are improved.

Description

Technical Field

[0001] The invention relates to a precision mold for injection molding of a flat shell, belonging to the technical field of injection molds. Background Art

[0002] Injection molds are tools for producing plastic products. Specifically, they are made by injecting heated and molten plastic into the mold cavity under high pressure from an injection molding machine. After cooling and solidification, products with a certain shape are obtained. With the popularization of electronic products and the improvement of consumers' requirements for product quality, tablet casings, as an important part of electronic products, are also facing higher and higher requirements for injection molding technology.

[0003] The patent with patent number CN211807525U discloses a tablet computer shell injection mold, including a fixed mold, a movable mold and a demolding device, the fixed mold includes a fixed mold plate and a fixed mold base plate, the fixed mold plate is fixedly connected to the fixed mold base plate, the fixed mold base plate is connected to the movable mold through the fixed mold plate, the movable mold includes a movable mold plate, a movable mold pad and a movable mold base plate, the movable mold plate is fixedly connected to the movable mold pad, the movable mold base plate is fixedly connected to the movable mold pad, and is slidably connected to the demolding device, the demolding device includes an ejection block, a push plate, a guide assembly and a push plate fixing plate, the guide assembly is installed in the push plate, the ejection block is installed in the push plate, and is slidably connected to the movable mold plate, the push plate is fixedly connected to the push plate fixing plate, and is located in the movable mold pad, and the push plate fixing plate is located between the movable mold base plate and the push plate, thereby realizing complete demolding of the plastic part.

[0004] However, the existing flat panel housing needs screws to fix during the assembly process, and during the injection molding process, a rotating mandrel with a corresponding thread shape is often required to be set in the mold. After the injection molding is completed, the rotating mandrel is driven by a driving device to screw out the screw hole, which leads to high mold complexity and manufacturing cost. Summary of the invention

[0005] The invention provides a precision mold for injection molding of a flat shell, so as to solve the problem in the prior art that a driving device is required to drive a rotating core shaft to unscrew a screw hole, resulting in a complex mold and high manufacturing cost.

[0006] The present invention provides a precision mold for injection molding of a flat shell, which comprises a movable mold plate and a fixed mold plate, wherein a movable mold core plate is provided in the movable mold plate, a fixed mold core plate is provided in the fixed mold plate, the movable mold core plate and the fixed mold core plate form a mold cavity, a first injection hole is provided on the movable mold plate, a first cavity is provided between the movable mold plate and the movable mold core plate, the first injection hole is connected to the first cavity, a second injection hole connected to the first cavity is provided on the movable mold core plate, a hole sleeve assembly corresponding to the second injection hole is provided in the first cavity, and a first sealing frame is provided at the bottom of the hole sleeve assembly;

[0007] The fixed mold core plate is provided with a positioning block and a driving assembly corresponding to the positioning block, the positioning block passes through the bottom of the fixed mold core plate and is connected to the driving assembly, the positioning block is provided with a thread, the fixed mold plate is provided with a stripping plate corresponding to the fixed mold core plate, and an air bag is provided at the bottom of the stripping plate;

[0008] The movable template and the fixed template are connected via a supporting portion, and a lifting portion is provided on the top of the movable template.

[0009] Preferably, there are a plurality of the second injection holes, and the plurality of the second injection holes are linearly distributed on the top of the movable mold core plate. A notch is provided on the second injection hole, and the notch is located inside the first cavity.

[0010] The hole sleeve assembly includes a hole sleeve and a support frame. The hole sleeve is slidably connected to the second injection hole. The hole sleeve corresponds to the notch. The multiple hole sleeves are connected through the support frame. The support frame is slidably connected to the movable template. A first spring is provided between the support frame and the movable template. The first sealing frame is fixedly connected to the support frame. A first sealing groove corresponding to the first sealing frame is provided at the bottom of the movable template.

[0011] The driving assembly includes a first gear and a second gear. The second gear is located at both ends of the first gear and connected to the bottom of the positioning block. The first gear and the second gear are connected by a rack. Both ends of the rack are respectively meshed with the first gear and the second gear.

[0012] The lifting part includes a support plate and a lifting assembly. The lifting assembly is located above the support plate and connected to the top of the movable template. The support plate and the movable template are connected by a support spring. The airbags are evenly distributed at the bottom of the stripping template.

[0013] The positioning block comprises a screw sleeve and a rod body, the rod body is provided with a slide groove, the screw sleeve slides up and down along the slide groove, the screw sleeve is provided with a thread, and a support component is provided between the top of the rod body and the top of the inner wall of the screw sleeve.

[0014] The bottom of the rod body is a hexagonal prism, the second gear is provided with a fixing seat, the fixing seat is provided with a groove corresponding to the hexagonal prism, and the groove and the bottom of the hexagonal prism are both provided with corresponding magnets.

[0015] A support wall is provided in the screw sleeve, a second cavity is provided between the support wall and the screw sleeve, a plurality of filling layers are provided in the second cavity, the filling layers are in bubble shape and contact with the inner wall of the screw sleeve and are linearly distributed in the second cavity, and the filling layers are filled with phase change wax.

[0016] The support part includes a piston rod and a cylinder. The cylinder is located outside the fixed mold core plate in the fixed mold plate. The piston rod passes through the top of the fixed mold plate and is connected to the cylinder. A third cavity is provided on the side wall of the fixed mold core plate. The cylinder and the third cavity are connected through a pipe.

[0017] A baffle is provided on the top of the third cavity, and openings corresponding to the third cavity are provided on the top of the third cavity and the side wall of the fixed mold core plate. The baffle is slidably connected to the fixed mold plate and is connected to the fixed mold plate through a second spring. A telescopic assembly is provided on the baffle, a second sealing frame is provided at the bottom of the movable mold plate, and a second sealing groove corresponding to the second sealing frame is provided on the top of the fixed mold plate.

[0018] Beneficial effects of the present invention:

[0019] The present invention provides a precision mold for injection molding of a flat shell, which does not need to be driven by a driving device to drive a rotating core shaft to unscrew a screw hole, thereby simplifying the mold structure and reducing the manufacturing cost. Through the thread design on the positioning block, the mold can directly inject a shell with a thread without subsequent processing, further simplifying the production process, and controlling the opening and closing of the notch on the second injection hole by moving the hole sleeve assembly up and down, thereby accurately controlling the flow of the injection molding raw material. The bottom of the demoulding plate is provided with evenly distributed air bags, and demoulding is achieved by inflating the air bags, which simplifies the demoulding process, reduces the wear and damage of the mold, and increases the service life of the mold. The lifting part is supported by the rectangular distribution of the spring, which enhances the stability and buffering effect during the lifting process. The effect is further reduced, and the wear and impact of the mold are further reduced. The movable template and the fixed template are respectively provided with a first sealing frame and a second sealing frame. When the two are in contact, a tight sealing space is formed, which effectively prevents the leakage of the injection molding material and improves the sealing of the mold. The positioning block is composed of a screw sleeve and a rod body. The screw sleeve can slide up and down along the rod body slide groove, so as to accurately control the thread length of the molding shell and meet the diverse needs of different products for the thread length. Through the design of the piston rod and the cylinder of the support part, and the cooperation of the third cavity and the baffle, the air pressure in the mold cavity is effectively controlled to ensure the stability of the injection molding process, prevent the injection molding material from overflowing due to excessive pressure, and promote the uniform filling of the raw material in the mold cavity, thereby improving the molding quality and consistency of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a structural schematic diagram of a precision mold for injection molding of a flat shell.

[0021] Figure 2 The present invention is a schematic cross-sectional structural diagram of a precision mold for injection molding of a flat shell.

[0022] Figure 3 This is a schematic structural diagram from another angle of a precision mold for injection molding of a flat shell of the present invention.

[0023] Figure 4 The present invention is a schematic diagram of a movable plate structure of a precision mold for injection molding of a flat shell.

[0024] Figure 5 The present invention is a schematic structural diagram of a hole sleeve assembly of a precision mold for injection molding of a flat shell.

[0025] Figure 6 The present invention is a schematic diagram of the support structure of a precision mold for injection molding of a flat shell.

[0026] Figure 7 The present invention is a schematic diagram of the exploded structure of a movable platen of a precision mold for injection molding of a flat shell.

[0027] Figure 8 This is a schematic structural diagram from another angle of a hole sleeve assembly of a precision mold for injection molding of a flat shell according to the present invention.

[0028] Fig. 9 The present invention is a schematic diagram of the exploded structure of a fixed mold plate of a precision mold for injection molding of a flat shell.

[0029] Fig.10 This is another exploded structural schematic diagram of a fixed platen of a precision mold for injection molding of a flat shell according to the present invention.

[0030] Fig.11 The diagram is a schematic diagram of the exploded structure of a driving component of a precision mold for injection molding of a flat shell according to the present invention.

[0031] Fig.12 The present invention is a schematic diagram of a positioning block structure of a precision mold for injection molding of a flat shell.

[0032] Fig.13 The figure is a schematic diagram of the exploded structure of a positioning block of a precision mold for injection molding of a flat shell according to the present invention.

[0033] Fig.14 The present invention is a schematic diagram of a screw sleeve structure of a precision mold for injection molding of a flat shell.

[0034] In the figure: 1, movable template, 11, movable mold core plate, 12, first cavity, 13, second injection hole, 131, notch, 14, hole sleeve assembly, 141, hole sleeve, 142, support frame, 143, first spring, 15, first sealing frame, 16, second sealing frame, 2, fixed template, 21, fixed mold core plate, 22, positioning block, 221, screw sleeve, 2211, support wall, 2212, filling layer, 222, rod body, 23 , driving assembly, 231, first gear, 232, second gear, 2321, fixed seat, 233, rack, 24, stripping plate, 241, airbag, 25, third cavity, 26, baffle, 27, second spring, 28, telescopic assembly, 29, second sealing groove, 3, lifting part, 31, support plate, 32, lifting assembly, 33, support spring, 4, support part, 41, piston rod, 42, cylinder, 43, pipeline. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] Example 1

[0037] The present invention provides a precision mold for injection molding of a flat shell, which includes a movable mold plate 1 and a fixed mold plate 2. The movable mold plate 1 is provided with a movable mold core plate 11, and the fixed mold plate 2 is provided with a fixed mold core plate 21. A mold cavity 000 is formed between the movable mold core plate 11 and the fixed mold core plate 21. A lifting part 3 is provided on the movable mold plate 1, and a supporting part 4 is provided between the movable mold plate 1 and the fixed mold plate 2. The movable mold plate 1 moves up and down along the supporting part 4 through the lifting part 3. A first injection hole 001 is provided on the movable mold plate 1. A gap exists between the movable mold plate 1 and the top of the movable mold core plate 11 to form a first cavity 12. The first injection hole 001 and the first The first cavity 12 is connected, and a plurality of second injection holes 13 connected to the first cavity 12 are provided on the movable mold core plate 11. The second injection holes 13 are located at the top of the movable mold core plate 11 and are linearly distributed. A notch 131 is provided on the second injection hole 13, and the notch 131 is located inside the first cavity 12. A hole sleeve assembly 14 corresponding to the second injection hole 13 is provided in the first cavity 12. The hole sleeve assembly 14 moves up and down along the second injection hole 13 to control the opening and closing of the notch 131. A first sealing frame 15 is provided at the bottom of the hole sleeve assembly 14, and the first sealing frame 15 is fixedly connected to the hole sleeve assembly 14;

[0038] The fixed mold core plate 21 is provided with a positioning block 22 and a driving assembly 23 corresponding to the positioning block 22. The positioning block 22 passes through the bottom of the fixed mold core plate 21 and rotates through the driving assembly 23. The positioning block 22 is provided with a thread. A stripping plate 24 corresponding to the fixed mold core plate 21 is provided in the fixed mold plate 2. An air bag 241 is provided at the bottom of the stripping plate 24. The air bags 241 are evenly distributed at the bottom of the stripping plate 24.

[0039] The lifting part 3 includes a support plate 31 and a lifting assembly 32. The lifting assembly 32 is located above the support plate 31 and connected to the top of the movable plate 1. A support spring 33 is provided between the support plate 31 and the movable plate 1. The support spring 33 is distributed in a rectangular shape.

[0040] The hole sleeve assembly 14 includes a hole sleeve 141 and a support frame 142. The hole sleeve 141 is slidably connected to the second injection hole 13. The hole sleeves 141 are connected to each other through the support frame 142. A slide groove corresponding to the support frame 142 is provided inside the movable template 1. The support frame 142 is slidably connected along the slide groove. A first spring 143 connected to the top of the slide groove is provided on the top of the support frame 142. The first sealing frame 15 is located at the bottom of the movable template 1 and is fixedly connected to the support frame 142. The bottom of the movable template 1 is provided with a first sealing groove 003 corresponding to the first sealing frame 15.

[0041] The driving assembly 23 includes a first gear 231 and a second gear 232. The second gear 232 is located at both ends of the first gear 231 and is connected to the bottom of the positioning block 22. The first gear 231 and the second gear 232 are connected by a rack 233. The two ends of the rack 233 are respectively meshed with the first gear 231 and the second gear 232. The first gear 231 is driven by a motor. The positioning block 22 is coaxial with the second gear 232. The second gear 232 drives the positioning block 22 to rotate.

[0042] When in use, the lifting part 3 starts to work, and the movable mold plate 1 moves downward along the support part 4 through the lifting component 32. The raw material passes through the injection molding machine through the first injection hole 001 and enters the first cavity 12. As the movable mold plate 1 moves downward, the second injection hole 13 at the bottom of the movable mold plate 1 contacts the upper surface of the fixed mold plate 2. The upper surface of the fixed mold plate 2 squeezes the first sealing frame 15 and drives the first sealing frame 15 to move upward. The first sealing frame 15 enters the first sealing groove 003 and drives the hole sleeve assembly 14 to move upward. The hole sleeve 141 slides upward along the second injection hole 13. When the movable mold core plate 11 and the fixed mold core plate 21 are sealed, a mold cavity 000 is formed. The hole sleeve 141 exposes the notch 131 on the second injection hole 13, and the first cavity 1 2 is injected into the mold cavity 000 through multiple second injection holes 13 for molding. The first sealing frame is located in the first sealing groove 003 to effectively achieve sealing. The positioning block 22 is used to achieve the injection molding of the threads on the injection molding shell. After the injection molding is completed, the lifting component 32 drives the movable template 1 to move upward, and the support spring 33 begins to compress and begins to expand through the inflation of the airbag 241. The airbag 241 drives the stripping template 24 to move upward so that the stripping template 24 moves upward to achieve the demoulding of the shell. At the same time, the motor drives the first gear 231 to rotate, and the first gear 231 drives the racks 233 at both ends to move, and the rack 233 drives the second gear 232 to rotate, thereby realizing the rotation of the positioning block 22 to achieve automatic demoulding of the threaded part of the shell.

[0043] Compared with the prior art, by connecting the first injection hole 001 with the first cavity 12, the injection molding material can evenly enter the interior of the mold, providing a stable supply of raw materials for the subsequent injection molding process, the hole sleeve assembly 14 is slidably connected to the inside of the movable template 1 through the slide groove, realizing precise control of the second injection hole 13, the up and down movement of the hole sleeve 141 can control the opening and closing of the notch 131, thereby controlling the flow of the injection molding material, improving the accuracy and flexibility of injection molding, the fixed connection between the first sealing frame 15 and the hole sleeve assembly 14, and the cooperation of the first sealing frame 15 in the first sealing groove 003, effectively realize the sealing of the mold, prevent the leakage of the injection molding material, and improve the quality and efficiency of the injection molded product, by providing a thread on the positioning block 22, the mold can directly inject a shell with a thread, without the need for subsequent processing, thereby improving production efficiency and product quality, the bottom of the stripping plate 24 is provided with evenly distributed air bags 241, and the upward movement of the stripping plate 24 is realized by the inflation of the air bags 241, thereby easily realizing the demoulding of the shell. It not only simplifies the demoulding process, but also reduces the wear and damage of the mold and improves the service life of the mold. The lifting part 3 drives the movable template 1 to move up and down, and the rectangular distribution of the supporting spring 33 enhances the stability and buffering effect during the lifting process, reducing the wear and impact of the mold.

[0044] Example 2

[0045] In the above embodiment, the injection molding of the thread is achieved by the positioning block 22, and the length of the thread is often determined by the fixed structure of the mold. Once the mold is made, the length of the thread is difficult to adjust. Therefore, the embodiment of the present application optimizes the positioning block 22 based on the above embodiment.

[0046] In this embodiment, the positioning block 22 includes a screw sleeve 221 and a rod body 222. The rod body 222 is provided with a slide groove, and the screw sleeve 221 slides up and down along the slide groove. The screw sleeve 221 is provided with a thread. The screw sleeve 221 and the rod body 222 are coaxial. A support component 004 is provided between the top of the rod body 222 and the top of the inner wall of the screw sleeve 221. The screw sleeve 221 slides up and down through the support component 004. The bottom of the rod body 222 is a hexagonal prism. The second gear 232 is provided with a fixed seat 2321. The fixed seat 2321 is provided with a groove corresponding to the hexagonal prism, and corresponding magnets are provided at the groove and the bottom of the hexagonal prism.

[0047] When in use, according to the specific thread length requirement of the molding shell, the support assembly 004 is controlled to drive the screw sleeve 221 to slide up and down along the slide groove on the rod body 222, thereby controlling the length of the screw sleeve 221 extending into the fixed mold core plate 21, so as to achieve the purpose of controlling the thread length of the molding shell, improve the control accuracy of the thread length, and meet the diverse needs of different products for the thread length. By inserting the hexagonal prism at the bottom of the rod body 222 into the groove for limiting, and fixing it by magnetic attraction with a magnet, not only the stability of the fixation is improved, but also it is easy to operate and maintain. The magnetic attraction of the magnet can ensure that the screw sleeve 221 maintains a stable position during the injection molding process, avoiding injection molding defects caused by looseness or offset.

[0048] Compared with the prior art, the screw sleeve 221 is driven to slide up and down along the slide groove on the rod body 222 by the support component 004, and the length of the screw sleeve 221 deep into the fixed mold core plate 21 can be accurately controlled, so that the length of the thread is no longer limited by the fixed structure of the mold, but can be flexibly adjusted according to specific needs, thereby greatly improving the control accuracy of the thread length, whether long thread or short thread is required, it can be achieved by simply adjusting the position of the screw sleeve 221, without replacing the entire mold or making complex adjustments, greatly improving production efficiency and flexibility, the hexagonal prism at the bottom of the rod body 222 is matched with the groove on the fixed seat 2321, and is fixed by magnetic attraction through a magnet, which not only improves the stability of the fixation, but also is easy to operate and maintain. The magnetic attraction of the magnet can ensure that the screw sleeve 221 maintains a stable position during the injection molding process, avoiding injection molding defects caused by looseness or offset, thereby improving the quality and pass rate of the product.

[0049] Example 3

[0050] In the above embodiment, the threaded portion is formed simultaneously with other portions in the mold cavity 000, which makes it difficult to smoothly remove the threaded portion due to adhesion with other portions during demoulding. Therefore, the embodiment of the present application optimizes the positioning block 22 based on the above embodiment.

[0051] In this embodiment, a support wall 2211 is provided inside the screw sleeve 221, and there are gaps at both ends between the support wall 2211 and the screw sleeve 221, which are sealed to form a second cavity 005. A plurality of filling layers 2212 are provided in the second cavity 005. The filling layers 2212 are in the form of bubbles and contact with the inner wall of the screw sleeve 221 and are linearly distributed in the second cavity 005. The filling layers 2212 are filled with phase change wax.

[0052] During use, when the mold cavity 000 is injection molded, the phase change wax in the multiple filling layers 2212 in the second cavity 005 can absorb heat from the injection material on the outer surface of the screw sleeve 221 during the molding process, so that the threaded part can be solidified and molded first, ensuring better demolding during the demolding process. The filling layer 2212 is in a bubble shape to improve the stability of the phase change wax in the filling layer 2212, and can evenly disperse the phase change wax to prevent it from aggregating or unevenly dispersing due to vibration or flow, thereby ensuring that the phase change wax can continuously and stably absorb heat and undergo phase change. The contact between the filling layer 2212 and the inner wall of the screw sleeve 221 can ensure that the phase change wax can absorb heat and undergo phase change in time during the injection molding process.

[0053] Compared with the prior art, during the injection molding process, the phase change wax filled in the filling layer 2212 in the second cavity 005 can absorb the heat of the injection molding material on the outer surface of the screw sleeve 221, and the threaded part can reach the curing temperature faster than the parts in other mold cavities 000, thereby realizing the priority curing molding of the threaded part, ensuring that the threaded part is completely cured when demolding, reducing adhesion with other parts, and improving the smoothness and efficiency of demolding. The priority curing molding of the threaded part not only makes the demolding process smoother, but also improves the quality and appearance of the product after demolding. It will not be deformed or damaged due to adhesion with other parts during demolding, thereby ensuring the product The dimensional accuracy and surface smoothness of the product are improved. The filling layer 2212 is in the form of bubbles and can evenly disperse the phase change wax to prevent it from agglomerating or unevenly dispersing due to vibration or flow, and can effectively improve the stability and uniformity of the phase change wax in the filling layer, ensuring that the phase change wax can continuously and stably absorb heat and undergo phase change, thereby improving the stability and controllability of the entire injection molding process. The filling layer 2212 is in contact with the inner wall of the screw sleeve 221, so that the phase change wax can directly and quickly absorb the heat of the injection molding material on the outer surface of the screw sleeve, thereby improving the thermal efficiency of the injection molding process, and enabling the phase change wax to respond faster and undergo phase change, thereby further shortening the curing time of the threaded part.

[0054] Example 4

[0055] In the above embodiment, if the pressure in the mold cavity cannot be effectively controlled, the injection molding material may overflow from the gap of the mold due to excessive pressure, resulting in product defects or waste, and the flow of the injection molding material in the mold cavity may be uneven, affecting the molding quality and consistency of the product. Therefore, the embodiment of the present application optimizes the fixed mold plate 2 based on the above embodiment.

[0056] In this embodiment, the support part 4 includes a piston rod 41 and a cylinder 42. The cylinder 42 is located outside the fixed mold core plate 21 in the fixed mold plate 2. The piston rod 41 passes through the top of the fixed mold plate 2 and is connected to the cylinder 42. The piston rod 41 and the cylinder 42 are coaxial. A third cavity 25 is provided on the side wall of the fixed mold core plate 21. The bottom of the cylinder 42 is connected to the third cavity 25 through a pipe 43. A baffle 26 is provided on the top of the third cavity 25. The top of the third cavity 25 and the side wall of the fixed mold core plate 21 are both provided with openings corresponding to the third cavity 25. The baffle 26 is located on the top of the third cavity 25 and is slidably connected to the fixed mold plate 2 in a transverse direction and is connected to the fixed mold plate 2 through a second spring 27. A telescopic component 28 is provided on one side of the baffle 26.

[0057] A second sealing frame 16 is provided at the bottom of the movable template 1 , and the second sealing frame 16 is fixedly connected to the bottom of the movable template 1 . A second sealing groove 29 opposite to the second sealing frame 16 is provided at the top of the fixed template 2 .

[0058] When in use, the movable template 1 moves downward through the lifting part 3, driving the piston rod 41 to move downward to compress the gas in the cylinder 42. The compressed gas in the cylinder 42 flows into the third cavity 25 through the pipeline 43, and flows into the fixed mold core plate 21 through the top opening of the third cavity 25 and the opening of the side wall of the fixed mold core plate 21 in turn. When the bottom of the movable template 1 contacts the top of the fixed template 2, the first sealing frame 15 and the second sealing frame 16 form a sealed space, and the second sealing frame 16 is inserted into the second sealing groove 29 to form a tightly sealed space. This effectively overcomes the problem of insufficient mold sealing in the existing design. At this time, the movable mold plate 1 continues to move downward to form a mold cavity 000 with the movable mold core plate 11 and the fixed mold core plate 21. At this time, since it is a sealed space, the compressed air is located in the mold cavity 000, which increases the air pressure in the mold cavity 000. The synchronous telescopic component 28 starts to work and drives the baffle 26 to move to seal the opening on the top of the third cavity 25 and the side wall of the fixed mold core plate 21, further controlling the air pressure in the mold cavity to ensure the stability of the injection molding process. The second injection hole 13 starts injection molding, and the injection molding pressure is resisted by compressed air, thereby avoiding excessive pressure during the injection molding process and overflowing from the gap between the movable mold core plate 11 and the fixed mold core plate 21. It can also ensure that the injection molding material can flow at a uniform speed during the injection molding process, which helps to evenly fill the raw material in the mold cavity, thereby improving the molding quality and consistency of the product.

[0059] Compared with the prior art, the second sealing frame 16 at the bottom of the movable template 1 cooperates with the second sealing groove 29 at the top of the fixed template 2, and a tight sealing space is formed when the two are in contact, which effectively overcomes the problem of insufficient mold sealing in the existing design, and ensures that the gas and raw materials will not leak from the mold gap during the injection molding process, thereby avoiding product defects or waste. The piston rod 41 in the support part 4 cooperates with the cylinder 42, and the gas in the cylinder 42 is compressed by the downward movement of the movable template 1, so that the gas flows into the third cavity 25 through the pipeline 43, and finally enters the mold cavity 000, which not only increases the air pressure in the mold cavity, but also drives the baffle 26 to move through the telescopic component 28, and blocks the openings at the top of the third cavity 25 and the side wall of the fixed mold core plate 21, and further accurately controls the air pressure in the mold cavity. This ensures the stability of the injection molding process, prevents the overflow of raw materials caused by excessive injection molding pressure, and ensures the uniform flow of injection molding raw materials in the mold cavity by accurately controlling the air pressure in the mold cavity. The compressed air not only resists the pressure of injection molding, but also promotes the uniform distribution of raw materials, thereby improving the molding quality and consistency of the product, overcoming the problem of uneven flow of injection molding raw materials in the existing design, making the product more beautiful and with stable performance.

[0060] The present invention and its embodiments are described above, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and do not deviate from the purpose of the invention, they can creatively design a structure and embodiment similar to the technical solution, which should fall within the protection scope of the present invention.

Claims

1. A precision mold for injection molding of a flat shell, comprising a movable mold plate (1) and a fixed mold plate (2), wherein the movable mold plate (1) is provided with a movable mold core plate (11), and the fixed mold plate (2) is provided with a fixed mold core plate (21), and the movable mold core plate (11) and the fixed mold core plate (21) form a mold cavity, characterized in that: The movable mold plate (1) is provided with a first injection hole, a first cavity (12) is provided between the movable mold plate (1) and the movable mold core plate (11), the first injection hole is connected to the first cavity (12), the movable mold core plate (11) is provided with a second injection hole (13) connected to the first cavity (12), a hole sleeve assembly (14) corresponding to the second injection hole (13) is provided in the first cavity (12), and a first sealing frame (15) is provided at the bottom of the hole sleeve assembly (14); The fixed mold core plate (21) is provided with a positioning block (22) and a driving assembly (23) corresponding to the positioning block (22); the positioning block (22) passes through the bottom of the fixed mold core plate (21) and is connected to the driving assembly (23); the positioning block (22) is provided with a thread; a stripping plate (24) corresponding to the fixed mold core plate (21) is provided in the fixed mold plate (2); an air bag (241) is provided at the bottom of the stripping plate (24); The movable die plate (1) and the fixed die plate (2) are connected via a support portion (4), and a lifting portion (3) is provided on the top of the movable die plate (1).

2. A precision mold for injection molding of a flat housing according to claim 1, characterized in that: There are a plurality of second injection holes (13), and the plurality of second injection holes (13) are located on the top of the movable mold core plate (11) and are linearly distributed. A notch (131) is provided on the second injection hole (13), and the notch (131) is located inside the first cavity (12).

3. A precision mold for injection molding of a flat housing according to claim 2, characterized in that: The hole sleeve assembly (14) comprises a hole sleeve (141) and a support frame (142); the hole sleeve (141) is slidably connected to a plurality of second injection holes (13); the hole sleeve (141) corresponds to the notch (131); the plurality of hole sleeves (141) are connected via the support frame (142); the support frame (142) is slidably connected to the movable template (1); a first spring (143) is provided between the support frame (142) and the movable template (1); the first sealing frame (15) is fixedly connected to the support frame (142); and a first sealing groove corresponding to the first sealing frame (15) is provided at the bottom of the movable template (1).

4. The precision mold for injection molding of a flat housing according to claim 1, characterized in that: The driving assembly (23) comprises a first gear (231) and a second gear (232); the second gear (232) is located at both ends of the first gear (231) and is connected to the bottom of the positioning block (22); the first gear (231) and the second gear (232) are connected via a rack (233); and the two ends of the rack (233) are respectively meshed with the first gear (231) and the second gear (232).

5. The precision mold for injection molding of a flat housing according to claim 1, characterized in that: The lifting part (3) comprises a support plate (31) and a lifting assembly (32); the lifting assembly (32) is located above the support plate (31) and connected to the top of the movable plate (1); the support plate (31) and the movable plate (1) are connected via a support spring (33); and the airbags (241) are located at the bottom of the stripping plate (24) and are evenly distributed.

6. The precision mold for injection molding of a flat housing according to claim 4, characterized in that: The positioning block (22) comprises a screw sleeve (221) and a rod body (222); a slide groove is provided on the rod body (222); the screw sleeve (221) slides up and down along the slide groove; a thread is provided on the screw sleeve (221); and a support assembly is provided between the top of the rod body (222) and the top of the inner wall of the screw sleeve (221).

7. A precision mold for injection molding of a flat housing according to claim 6, characterized in that: The bottom of the rod body (222) is a hexagonal prism, the second gear (232) is provided with a fixing seat (2321), the fixing seat (2321) is provided with a groove corresponding to the hexagonal prism, and the groove and the bottom of the hexagonal prism are both provided with corresponding magnets.

8. The precision mold for injection molding of a flat housing according to claim 6, characterized in that: A support wall (2211) is provided in the screw sleeve (221), a second cavity is provided between the support wall (2211) and the screw sleeve (221), a plurality of filling layers (2212) are provided in the second cavity, the filling layers (2212) are in bubble shape and contact with the inner wall of the screw sleeve (221) and are linearly distributed in the second cavity, and the filling layers (2212) are filled with phase change wax.

9. The precision mold for injection molding of a flat housing according to claim 1, characterized in that: The support portion (4) comprises a piston rod (41) and a cylinder (42); the cylinder (42) is located outside the fixed mold core plate (21) in the fixed mold plate (2); the piston rod (41) passes through the top of the fixed mold plate (2) and is connected to the cylinder (42); a third cavity (25) is provided on the side wall of the fixed mold core plate (21); and the cylinder (42) and the third cavity (25) are connected via a pipe (43).

10. The precision mold for injection molding of a flat housing according to claim 9, characterized in that: A baffle (26) is provided at the top of the third cavity (25); an opening corresponding to the third cavity (25) is provided at the top of the third cavity (25) and the side wall of the fixed mold core plate (21); the baffle (26) is slidably connected to the fixed mold plate (2) and is connected to the fixed mold plate (2) via a second spring (27); a telescopic component (28) is provided on the baffle (26); a second sealing frame (16) is provided at the bottom of the movable mold plate (1); and a second sealing groove (29) corresponding to the second sealing frame (16) is provided at the top of the fixed mold plate (2).

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