A high-precision injection mold for an automotive seat back panel

Abstract

The present invention relates to the technical field of injection molds, and provides a high-precision injection mold for an automobile seat backrest, which includes a fixed sealing plate and a movable sealing plate. A mold set is installed between the fixed sealing plate and the movable sealing plate. The mold set includes a fixed mold and a movable mold. The fixed mold is installed on the fixed sealing plate, and the movable mold is installed on the movable sealing plate. The mold also includes a pressure equalizing mold core assembly, an injection pipe, and a positioning assembly. The pressure equalizing mold core assemblies are installed on both the fixed mold and the movable mold. The injection pipe is installed on the fixed mold, and the positioning assembly is installed on the mold set. Through the above technical solution, the problem in the prior art that due to long-term use, the gap of the mold guiding components increases, resulting in a decrease in the accuracy during mold docking, uneven material filling in local areas, and a decrease in the dimensional accuracy of the finished product is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molds, and more specifically, to a high-precision injection mold for an automotive seat backrest Background Art

[0002] An injection mold for an automotive seat backrest is a tool for manufacturing an automotive seat backrest. During operation, plastic is injected into the mold cavity under high pressure by an injection molding machine, and after cooling and solidification, a molded product is obtained. The specific process is that the upper mold cooperates with the lower mold. After injecting the raw material into the mold cavity, the upper mold is driven to move, and the finished product is taken out, thus completing the injection molding, that is, processing the plastic raw material into a seat backrest with a specific shape through the injection molding process.

[0003] After long-term use, the mold will have problems such as wear and an increase in the gap of the guiding components, which will lead to a reduction in the accuracy of the mold. Insufficient mold accuracy will result in uneven gaps, that is, when the two molds are butted, due to the uneven pressure distribution between the molds, there are gaps in some places, which will cause uneven filling of the material in the local area, and some materials will leak out from the gaps, and it is easy to shrink back after cooling, resulting in an increase in burrs on the injection molded workpiece, making the dimensional deviation of the finished product too large, thus affecting the processing accuracy. Summary of the Invention

[0004] The present invention provides a high-precision injection mold for an automotive seat backrest, which solves the problem in the prior art that due to long-term use, the gap of the guiding components of the mold increases, resulting in a reduction in the accuracy when the molds are butted, uneven filling of the material in the local area, and a reduction in the dimensional accuracy of the finished product.

[0005] The technical solution of the present invention is as follows:

[0006] A high-precision injection mold for an automotive seat backrest includes a fixed sealing plate and a movable sealing plate. A mold set is installed between the fixed sealing plate and the movable sealing plate. The mold set includes a fixed mold and a movable mold. The fixed mold is installed on the fixed sealing plate, and the movable mold is installed on the movable sealing plate. The mold further includes:

[0007] A pressure equalizing die core assembly, which is installed on both the fixed mold and the movable mold and is used to tightly press the fixed mold and the movable mold before injection molding;

[0008] An injection pipe, which is installed on the fixed mold and is used to convey materials during molding;

[0009] A positioning assembly, which is installed on the mold set and is used to align the movable mold when the fixed mold and the movable mold are butted.

[0010] Based on the above solution, the pressure equalizing die core assembly includes:

[0011] The fixed mold core is detachably installed in the fixed mold groove on the fixed mold;

[0012] Wherein, the tail end of the injection pipe is communicated with the fixed mold core;

[0013] The moving mold core is detachably arranged in the moving mold groove on the moving mold. There is a gap between the moving mold core and the moving mold groove. The fixed mold core is adapted to the moving mold core and forms a closed molding cavity when the mold is closed;

[0014] The pressure equalizing installation part is installed between the moving mold core and the moving mold groove and is used for pressing the fixed mold core and the moving mold core when the mold is closed;

[0015] The position locking part is installed on the moving mold and is used for fixing the position of the pressure equalizing installation part.

[0016] On the basis of the foregoing solution, the pressure equalizing installation part includes:

[0017] The insertion cylinder. On one side of the moving mold core close to the moving mold groove, two groups of the insertion cylinders are symmetrically and fixedly installed, and each group of the insertion cylinders is provided with several;

[0018] The fixed sleeve. The fixed sleeve is coaxially sleeved on each insertion cylinder, and the fixed sleeve is fixedly connected with the moving mold groove;

[0019] The rubber ring. The rubber ring is coaxially and fixedly installed on each fixed sleeve, and the rubber ring is fixedly connected with the insertion cylinder.

[0020] On the basis of the foregoing solution, it further includes:

[0021] The tension hole. The tension hole is coaxially opened inside each insertion cylinder;

[0022] The tension member. The tension member is arranged in each tension hole. The tension member is in sliding fit with the fixed sleeve and is used for tensioning the insertion cylinder.

[0023] On the basis of the foregoing solution, the tension member includes:

[0024] The tension rod. The tension rod is coaxially and slidably installed on each fixed sleeve;

[0025] The spherical tension block. The spherical tension block is arranged inside each tension hole, and the spherical tension block is fixedly connected with the tension rod;

[0026] Wherein, at one end of each tension hole close to the fixed sleeve, a contact surface adapted to the spherical tension block is provided.

[0027] On the basis of the foregoing solution, there is a gap between the inner side wall of each of the fixed sleeves and the insertion cylinder, and there is a gap between the side wall of each spherical tensioning block and the tensioning hole.

[0028] On the basis of the foregoing solution, the position locking portion includes:

[0029] Locking grooves, several of the locking grooves are opened at the bottom of the moving die groove, and the several locking grooves correspond to the several fixed sleeves one by one. The locking grooves are provided with a positioning area and a sliding area;

[0030] Locking frames, each end of the tensioning rod is fixedly installed with a locking frame, the locking frame is slidably installed in the sliding area, and one side of each locking frame close to the positioning area is provided as an inclined surface;

[0031] Springs, each spring is fixedly installed between the locking frame and the fixed sleeve;

[0032] Positioning members, each positioning area is installed with the positioning members for fixing the position of the locking frame.

[0033] On the basis of the foregoing solution, the positioning member includes:

[0034] Electric cylinders, each electric cylinder is installed inside the corresponding positioning area;

[0035] Positioning frames, the output end of each electric cylinder is fixedly installed with a positioning frame, the positioning frame is slidably installed in the sliding area, and the positioning frame is adapted to the inclined surface of the locking frame.

[0036] On the basis of the foregoing solution, the positioning assembly includes:

[0037] Positioning blocks, four of the positioning blocks are symmetrically and fixedly installed on the fixed die core;

[0038] Positioning grooves, four of the positioning grooves are symmetrically opened on the moving die core, and the four positioning grooves correspond to and are adapted to the four positioning blocks one by one.

[0039] On the basis of the foregoing solution, it further includes guide posts. Four of the guide posts are symmetrically and fixedly installed on the fixed mold, and guide holes corresponding to the guide posts are opened at corresponding positions on the moving mold. The guide holes are adapted to the guide posts.

[0040] The working principle and beneficial effects of the present invention are:

[0041] 1. In the present invention, when the fixed mold core and the movable mold core are butted, under the action of pressure, at this time, the rubber ring will be under the pressure between the insertion cylinder and the fixed sleeve, and the rubber ring is compressed. At this time, the insertion cylinder will have a slight displacement in the fixed sleeve, so that the pressure between the fixed mold core and the movable mold core becomes more uniform, avoiding the problem of size deviation of the finished product caused by uneven pressure between the fixed mold core and the movable mold core; 2. In the present invention, the spherical tension block abuts against the contact surface where the tension hole cooperates with the spherical tension block until the spherical tension block closely adheres to the contact surface, then the tension rod can be fixed, making the spherical tension block tightly abut against the contact surface. When the axis of the tension hole does not coincide with or intersects with the axis of the tension rod, the spherical tension block can automatically adapt and adjust to ensure the close fit of the contact surface, avoiding the change of the gap between the insertion cylinder and the fixed sleeve caused by the displacement of the tension rod, thus ensuring the accuracy of the butting position of the movable mold core and the fixed mold core; 3. In the present invention, through the setting of the positioning component, the fixed mold and the movable mold can be quickly butted, improving the operation efficiency. At the same time, through the setting of the pressure equalizing mold core component, when the fixed mold core and the movable mold core are butted, the pressure between the fixed mold core and the movable mold core can be automatically adjusted, and after one adjustment, without disassembling the fixed mold core and the movable mold core and other operations, there is no need for multiple adjustments, effectively improving the accuracy and adaptability of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0043] Figure 1 It is a schematic diagram of the overall structure in the present invention;

[0044] Figure 2 It is a schematic perspective sectional view in the present invention;

[0045] Figure 3 It is a schematic sectional view of the cooperation between the fixed mold and the fixed mold core in the present invention;

[0046] Figure 4 It is a schematic sectional view of the pressure equalizing mold core component in the present invention;

[0047] Figure 5 It is a schematic sectional view of the cooperation between the movable mold core and the pressure equalizing installation part in the present invention;

[0048] Figure 6 It is a schematic sectional view of the cooperation between the movable mold and the pressure equalizing installation part in the present invention;

[0049] Figure 7 It is a schematic sectional view of the pressure equalizing mold core component in the present invention;

[0050] Figure 8 It is a schematic sectional view of the cooperation between the positioning member and the locking groove in the present invention.

[0051] In the figure: 1, fixed sealing plate; 2, movable sealing plate; 3, fixed mold; 4, movable mold; 5, injection pipe; 6, fixed mold core; 7, fixed mold groove; 8, movable mold core; 9, movable mold groove; 10, insertion cylinder; 11, fixed sleeve; 12, rubber ring; 13, tensioning hole; 14, tensioning rod; 15, spherical tensioning block; 16, locking groove; 17, locking bracket; 18, spring; 19, electric cylinder; 20, positioning bracket; 21, positioning block; 22, positioning groove; 23, guide post; 24, guide hole. Specific implementation manner

[0052] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0053] As Figures 1 to 8 shown, this embodiment proposes a high-precision injection mold for an automobile seat guard plate, which includes a fixed sealing plate 1 and a movable sealing plate 2. A mold set is installed between the fixed sealing plate 1 and the movable sealing plate 2. The mold set includes a fixed mold 3 and a movable mold 4. The fixed mold 3 is installed on the fixed sealing plate 1, and the movable mold 4 is installed on the movable sealing plate 2. It also includes a pressure equalizing mold core assembly, an injection pipe 5 and a positioning assembly. Pressure equalizing mold core assemblies are installed on both the fixed mold 3 and the movable mold 4 for pressing the fixed mold 3 and the movable mold 4 before injection. The pressure equalizing mold core assembly includes a fixed mold core 6, a movable mold core 8, a pressure equalizing installation part and a position locking part. The fixed mold core 6 is detachably installed in the fixed mold groove 7 on the fixed mold 3. Among them, the tail end of the injection pipe 5 is communicated with the fixed mold core 6. The movable mold core 8 is detachably arranged in the movable mold groove 9 on the movable mold 4. There is a gap between the movable mold core 8 and the movable mold groove 9. The fixed mold core 6 is adapted to the movable mold core 8 and forms a closed molding cavity when the mold is closed. The pressure equalizing installation part is installed between the movable mold core 8 and the movable mold groove 9 for pressing the fixed mold core 6 and the movable mold core 8 when the mold is closed. The position locking part is installed on the movable mold 4 for fixing the position of the pressure equalizing installation part.

[0054] Specifically, during use, first install the fixed sealing plate 1 and the movable sealing plate 2 on the fixed side and the movable side of the injection molding machine respectively. Then, install the fixed mold core 6 and the movable mold core 8 on the fixed mold 3 and the movable mold 4 respectively, and adjust the positions between the fixed mold core 6 and the movable mold core 8 to avoid phenomena such as offset during mold closing. Then, connect the discharge port of the injection molding machine to the injection pipe 5, and the injection operation can be started. At this time, drive the movable sealing plate 2 to move until the movable sealing plate 2 pushes the movable mold 4 to combine with the fixed mold 3. At this time, the fixed mold core 6 and the movable mold core 8 are combined together under the action of the positioning component, and a closed cavity is formed between the two. During the docking process, in order to avoid gaps or pressure-unstable areas between the docking positions of the fixed mold core 6 and the movable mold core 8, which may cause some materials to leak at the gaps during the injection process, resulting in large deviations in the size of the finished product and affecting the dimensional accuracy. When the movable mold 4 and the fixed mold 3 are docked, under the action of the positioning component, the fixed mold core 6 and the movable mold core 8 can be quickly and accurately docked together. At this time, the position locking part is in the closed state. When the pressure equalizing installation part docks the fixed mold core 6 and the movable mold core 8, according to the different pressures at each position of the fixed mold core 6 and the movable mold core 8, it automatically adjusts the position of the movable mold core 8 in the movable mold groove 9 until the pressures at the docking positions between the movable mold core 8 and the fixed mold core 6 are the same. Then, the position locking part can be started to fix the position of the movable mold core 8 in the movable mold groove 9, improving the accuracy and tightness of the cooperation between the fixed mold core 6 and the movable mold core 8, thereby improving the processing accuracy. At this time, the injection molding machine can be started, and materials are injected into the cavity between the fixed mold core 6 and the movable mold core 8 through the injection pipe 5. After the finished product is cooled and formed, the movable sealing plate 2 is retracted, the fixed mold 3 and the movable mold 4 are separated, and then the finished product is taken out to complete the injection operation.

[0055] As described above, as Figures 4 to 7 shown, the pressure equalizing installation part includes a plugging cylinder 10, a fixed sleeve 11 and a rubber ring 12. On one side of the movable mold core 8 close to the movable mold groove 9, two groups of plugging cylinders 10 are symmetrically and fixedly installed. Each group of plugging cylinders 10 has several. A fixed sleeve 11 is coaxially sleeved on each plugging cylinder 10. The fixed sleeve 11 is fixedly connected to the movable mold groove 9. A rubber ring 12 is coaxially and fixedly installed on each fixed sleeve 11. The rubber ring 12 is fixedly connected to the plugging cylinder 10. The rubber ring 12 is made of high-temperature resistant silicone rubber material and can maintain stable deformation in a high-pressure injection environment. It also includes a tensioning hole 13 and a tensioning member. A tensioning hole 13 is coaxially opened inside each plugging cylinder 10. A tensioning member is arranged in each tensioning hole 13. The tensioning member is slidably matched with the fixed sleeve 11 and is used to tension the plugging cylinder 10.

[0056] Specifically, when the fixed mold core 6 and the moving mold core 8 are butted, under the action of pressure, at this time, the rubber ring 12 will be subjected to the pressure between the insertion cylinder 10 and the fixed sleeve 11, so that the rubber ring 12 is compressed. At this time, the insertion cylinder 10 will generate a small displacement in the fixed sleeve 11. At the same time, the pressure between the fixed mold core 6 and the moving mold core 8 becomes more uniform. Through the adjustment of the tensioning member, the pressure on the contact surface between the moving mold core 8 and the fixed mold core 6 is evenly distributed, thus avoiding the gap problem caused by uneven pressure and ensuring the accuracy of the product size.

[0057] As described above, Figure 5 , Figure 7 As shown in the figure, the tensioning member includes a tensioning rod 14 and a spherical tensioning block 15. A tensioning rod 14 is coaxially and slidably installed on each fixed sleeve 11. A spherical tensioning block 15 is arranged inside each tensioning hole 13. The spherical tensioning block 15 is fixedly connected to the tensioning rod 14. Among them, at one end of each tensioning hole 13 close to the fixed sleeve 11, a contact surface adapted to the spherical tensioning block 15 is provided. There is a gap between the inner side wall of each fixed sleeve 11 and the insertion cylinder 10. There is a gap between the side wall of each spherical tensioning block 15 and the tensioning hole 13.

[0058] Specifically, when it is necessary to fix the relative position between the fixed mold core 6 and the fixed mold groove 7, first, the spherical tensioning block 15 at the end of the tensioning rod 14 is abutted against the contact surface of the tensioning hole 13 that cooperates with the spherical tensioning block 15 until the spherical tensioning block 15 is in close contact with the contact surface, then the tensioning rod 14 can be fixed, so that the spherical tensioning block 15 presses against the contact surface, thereby fixing the relative position between the moving mold core 8 and the moving mold groove 9, ensuring that the moving mold core 8 and the moving mold groove 9 remain stable during the injection molding process, avoiding the molding error caused by the position change, and ensuring the production accuracy.

[0059] When the contact surface between the spherical tensioning block 15 and the tensioning hole 13 is in fit, due to the setting of the spherical surface, when the axis of the tensioning hole 13 and the axis of the tensioning rod 14 do not coincide or cross, the spherical tensioning block 15 can automatically adapt and adjust to ensure the close fit of the contact surface. This further improves the stability during tensioning, avoids the change of the gap between the insertion cylinder 10 and the fixed sleeve 11 caused by the displacement of the tensioning rod 14, thereby ensuring the accuracy of the butting position between the moving mold core 8 and the fixed mold core 6, and thus ensuring the accuracy of the product size.

[0060] As described above, Figure 7As shown in the figure, the position locking part includes a locking groove 16, a locking frame 17, a spring 18 and a positioning member. A plurality of locking grooves 16 are formed at the bottom of the moving die groove 9. The plurality of locking grooves 16 correspond to the plurality of fixed sleeves 11 one by one. The locking groove 16 is provided with a positioning area and a sliding area. A locking frame 17 is fixedly installed at the end of each tension rod 14. The locking frame 17 is slidably installed in the sliding area. One side of each locking frame 17 close to the positioning area is set as an inclined surface. A spring 18 is fixedly installed between each locking frame 17 and the fixed sleeve 11. A positioning member is installed in each positioning area for fixing the position of the locking frame 17.

[0061] Specifically, when the pressure at the docking position between the fixed die core 6 and the moving die core 8 is the same, the relative position between the insertion cylinder 10 and the fixed sleeve 11 is in the best state at this time. At this time, under the action of the spring 18, the spring 18 releases pressure and pushes the locking frame 17 to move in the sliding area of the locking groove 16 until the spherical positioning block 21 at the end of the tension rod 14 abuts against the contact surface under the elastic force of the spring 18. At this time, the positioning member is activated, and the positioning member contacts the inclined surface of the locking frame 17 to ensure that the locking frame 17 is firmly fixed in the positioning area, thereby fixing the relative position between the moving die core 8 and the moving die groove 9, and further improving the dimensional accuracy and molding quality of the product.

[0062] As described above, as Figure 7 , Figure 8 shown, the positioning member includes an electric cylinder 19 and a positioning frame 20. An electric cylinder 19 is installed inside each positioning area. A positioning frame 20 is fixedly installed at the output end of each electric cylinder 19. The positioning frame 20 is slidably installed in the sliding area. The positioning frame 20 is adapted to the inclined surface of the locking frame 17.

[0063] Specifically, when fixing the position of the locking frame 17 in the positioning area of the locking groove 16, the electric cylinder 19 is activated. The electric cylinder 19 pushes the positioning frame 20 to move until the positioning frame 20 closely fits the inclined surface of the locking frame 17, thereby fixing the position of the locking frame 17 to ensure the stability of the overall structure.

[0064] As Figures 2 to 4 shown, the injection pipe 5 is installed on the fixed mold 3 for conveying materials during molding. The positioning assembly is installed on the mold set for guiding the moving mold 4 when the fixed mold 3 is docked with the moving mold 4. The positioning assembly includes a positioning block 21 and a positioning groove 22. Four positioning blocks 21 are symmetrically and fixedly installed on the fixed die core 6. Four positioning grooves 22 are symmetrically formed on the moving die core 8. The four positioning grooves 22 correspond to and are adapted to the four positioning blocks 21. It also includes a guide post 23. Four guide posts 23 are symmetrically and fixedly installed on the fixed mold 3. Guide holes 24 are formed at the corresponding positions on the moving mold 4. The guide holes 24 are adapted to the guide posts 23.

[0065] Specifically, during the injection molding process, the moving seal plate 2 is driven to move until the moving seal plate 2 pushes the moving mold 4. When the guiding holes 24 on the moving mold 4 are completely aligned with the guiding columns 23, it ensures the accurate positioning of the moving mold core 8. At the same time, the positioning grooves 22 on the moving mold core 8 fit precisely with the positioning blocks 21 on the fixed mold core 6, forming a stable positioning structure, ensuring the consistency of the mold during the injection molding process and improving the docking accuracy.

[0066] The working principle or usage process of this application is as follows:

[0067] During use, first install the fixed seal plate 1 and the moving seal plate 2 on the fixed side and the moving side of the injection molding machine respectively. Then, install the fixed mold core 6 and the moving mold core 8 on the fixed mold 3 and the moving mold 4 respectively, and adjust the positions between the fixed mold core 6 and the moving mold core 8 to avoid phenomena such as offset during mold closing. Then, connect the discharge port of the injection molding machine to the injection pipe 5, and the injection molding operation can be started. At this time, drive the moving seal plate 2 to move. The moving seal plate 2 drives the moving mold 4 and the moving mold core 8 to move. The guiding holes 24 on the moving mold 4 are completely aligned with the guiding columns 23, ensuring the accurate positioning of the moving mold core 8. At the same time, the positioning grooves 22 on the moving mold core 8 fit precisely with the positioning blocks 21 on the fixed mold core 6, forming a stable positioning structure, ensuring the consistency of the mold during the injection molding process.

[0068] Until the moving seal plate 2 pushes the moving mold 4 to combine with the fixed mold 3, at this time, the fixed mold core 6 and the moving mold core 8 are combined together under the action of the positioning component, and a closed cavity is formed between them. During the docking process, in order to avoid the occurrence of gaps or pressure-unstable areas between the docking positions of the fixed mold core 6 and the moving mold core 8, which may cause some materials to leak at the gaps during the injection molding process, resulting in large deviations in the finished product size and affecting the dimensional accuracy. When the moving mold 4 and the fixed mold 3 are docked and under the action of pressure, at this time, the rubber ring 12 will be subjected to the pressure between the insertion cylinder 10 and the fixed sleeve 11, so that the rubber ring 12 is compressed. At this time, the insertion cylinder 10 will have a small displacement in the fixed sleeve 11. At the same time, the pressure between the fixed mold core 6 and the moving mold core 8 becomes more uniform, and then fix the relative positions between the moving mold core 8 and the moving mold groove 9.

[0069] When the pressure at the docking position between the fixed mold core 6 and the moving mold core 8 becomes uniform, the relative position between the plugging cylinder 10 and the fixed sleeve 11 at this time is in the best state. At this time, under the action of the spring 18, the spring 18 releases pressure and pushes against the locking frame 17 to move within the sliding area of the locking groove 16 until the spherical positioning block 21 at the end of the tension rod 14 abuts against the contact surface under the elastic force of the spring 18. Due to the setting of the spherical surface, when the axis of the tension hole 13 does not coincide with the axis of the tension rod 14 or there is an intersection, the spherical tension block 15 can automatically adapt and adjust to ensure the tight fit of the contact surface, which further improves the stability during tensioning, thus ensuring the accuracy of the docking position between the moving mold core 8 and the fixed mold core 6. Then, start the electric cylinder 19, and the electric cylinder 19 pushes the positioning frame 20 to move until the positioning frame 20 closely fits the inclined surface of the locking frame 17, thereby fixing the position of the locking frame 17, and then the relative position between the moving mold core 8 and the moving mold cavity 9 can be fixed, further improving the dimensional accuracy and molding quality of the product.

[0070] Then start the injection molding operation. At this time, start the injection molding machine and inject the material into the cavity between the fixed mold core 6 and the moving mold core 8 through the injection pipe 5. After the finished product is cooled and formed, retract the moving sealing plate 2 to separate the fixed mold 3 and the moving mold 4, and then take out the finished product to complete the injection molding operation.

[0071] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-precision injection mold for a car seat guard plate, comprising a fixed cover plate (1) and a movable cover plate (2), a mold group being installed between the fixed cover plate (1) and the movable cover plate (2), the mold group comprising a fixed mold (3) and a movable mold (4), the fixed mold (3) being installed on the fixed cover plate (1), and the movable mold (4) being installed on the movable cover plate (2), characterized in that: Also includes: An isostatic mold core assembly, the fixed mold (3) and the movable mold (4) are both equipped with the isostatic mold core assembly, and is used to press the fixed mold (3) and the movable mold (4) tightly before injection molding; An injection molding tube (5), the injection molding tube (5) being mounted on the fixed mold (3) and used for conveying materials during molding; a positioning assembly, the positioning assembly being mounted on the die set and used to align the movable die when the fixed die (3) and the movable die (4) are butted against each other; The isostatic mold core assembly comprises: A fixed mold core (6), the fixed mold core (6) being detachably mounted in a fixed mold groove (7) on the fixed mold (3); Wherein, the tail end of the injection tube (5) is connected to the fixed mold core (6); A movable mold core (8), the movable mold core (8) being detachably arranged in a movable mold groove (9) on the movable mold (4), a gap being present between the movable mold core (8) and the movable mold groove (9), the fixed mold core (6) being adapted to the movable mold core (8), and forming a closed molding cavity when the molds are closed; A pressure-equalizing mounting portion, the pressure-equalizing mounting portion being mounted between the movable mold core (8) and the movable mold groove (9) and being used to press the fixed mold core (6) and the movable mold core (8) when the mold is closed; A position locking portion, the position locking portion being mounted on the movable die (4) and used to fix the position of the pressure equalizing mounting portion; The pressure equalizing installation part comprises: Insertion cylinders (10), two groups of the insertion cylinders (10) are symmetrically and fixedly installed on one side of the movable mold core (8) close to the movable mold groove (9), and each group of the insertion cylinders (10) is provided with a plurality of insertion cylinders; A fixed sleeve (11), wherein each of the plug-in cylinders (10) is coaxially sleeved with the fixed sleeve (11), and the fixed sleeve (11) is fixedly connected to the movable mold groove (9); A rubber ring (12), wherein each of the fixing sleeves (11) is coaxially fixedly mounted with the rubber ring (12), and the rubber ring (12) is fixedly connected to the plug-in cylinder (10); Also includes: A tightening hole (13), wherein each of the plug-in tubes (10) is coaxially provided with the tightening hole (13); A tensioning member, wherein each of the tensioning holes (13) is provided with a tensioning member, the tensioning member slidably cooperates with the fixing sleeve (11) and is used to tighten the plug-in cylinder (10); The tensioning member comprises: A tension rod (14), wherein each of the fixing sleeves (11) is coaxially slidably mounted with the tension rod (14); A spherical tensioning block (15), wherein each of the tensioning holes (13) is provided with the spherical tensioning block (15), and the spherical tensioning block (15) is fixedly connected to the tensioning rod (14); Wherein, each of the tightening holes (13) is provided with a contact surface adapted to the spherical tightening block (15) at one end close to the fixing sleeve (11); There is a gap between the inner side wall of each fixing sleeve (11) and the plug-in tube (10), and there is a gap between the side wall of each spherical tensioning block (15) and the tensioning hole (13).

2. A high-precision injection mold for a car seat guard plate according to claim 1, characterized in that: The position locking portion comprises: A locking groove (16), wherein a plurality of the locking grooves (16) are provided at the bottom of the movable mold groove (9), the plurality of locking grooves (16) correspond to the plurality of fixed sleeves (11) one by one, and the locking grooves (16) are provided with a positioning area and a sliding area; A locking frame (17), wherein the end of each tension rod (14) is fixedly mounted with the locking frame (17), the locking frame (17) is slidably mounted in the sliding area, and a side of each locking frame (17) close to the positioning area is arranged as an inclined surface; A spring (18), wherein the spring (18) is fixedly mounted between each locking frame (17) and the fixing sleeve (11); A positioning component, each of the positioning areas is equipped with the positioning component, and is used to fix the position of the locking frame (17).

3. A high-precision injection mold for a car seat guard plate according to claim 2, characterized in that: The positioning member comprises: An electric cylinder (19), wherein the electric cylinder (19) is installed inside each of the positioning areas; A positioning frame (20), wherein the output end of each electric cylinder (19) is fixedly mounted with the positioning frame (20), the positioning frame (20) is slidably mounted in the sliding area, and the positioning frame (20) is adapted to the inclined surface of the locking frame (17).

4. The high-precision injection mold for a car seat guard plate according to claim 3, characterized in that: The positioning component comprises: Positioning blocks (21), four of which are symmetrically and fixedly mounted on the fixed mold core (6); Positioning grooves (22), four positioning grooves (22) are symmetrically provided on the movable mold core (8), and the four positioning grooves (22) correspond to and fit the four positioning blocks (21) one by one.

5. The high-precision injection mold for a car seat guard plate according to claim 4, characterized in that: It also comprises guide posts (23), four of which are symmetrically and fixedly mounted on the fixed mould (3), and guide holes (24) are provided at positions on the movable mould (4) corresponding to the guide posts (23), the guide holes (24) being adapted to fit the guide posts (23).

Images