Arc-shaped duplex screen forming injection mold

Abstract

The invention relates to the technical field of plastic material forming, in particular to an arc duplex screen forming injection mold which comprises a lower mold body, an upper mold body and a positioning column, guide sliding grooves are formed in the two sides of the lower portion in the lower mold body, guide sleeves are arranged on the two sides of the middle of the lower portion in the lower mold body, and first springs are arranged on the upper portions of the guide sleeves; an injection molding hole is formed in the middle of the upper portion in the upper mold, and positioning columns are arranged on the two sides of the lower portion in the upper mold. Elastic cooperation of the positioning column, the buffer sleeve and the second spring provides positioning precision buffer in the mold closing stage, mold damage caused by hard contact is avoided, and meanwhile it is ensured that the alignment error of the arc-shaped curved surface is reduced; due to the sliding design of the shaping template and the contact module, small-amplitude elastic displacement is realized under injection molding pressure, the curvature deviation of an arc-shaped surface caused by melt shrinkage is compensated, and the dimensional tolerance of a product is reduced; and the combination of the demolding rod and the lifting group can execute a symmetrical ejection stroke according to the distribution difference of the mold sticking force of the arc-shaped curved surface, so that the demolding resistance is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of plastic material molding, in particular to an arc-shaped double-screen molding injection mold. Background Art

[0002] The curved dual screen is a curved display solution that integrates the instrument panel and the central control screen in the car interior. The two screens are seamlessly connected through the curved splicing technology to form a coherent visual effect. The curved dual screen molding injection molding is a technology that uses the injection molding process to manufacture a dual screen shell or support with a curved structure. The core is to inject molten plastic into a special mold, and after cooling, it forms a component that conforms to the shape of the curved dual screen.

[0003] After searching, Chinese patent CN117324471A discloses a curved double screen mold structure. This patent aims to solve the problem that the double screen panel cannot be formed in one go and needs to replace the processing machine, making the processing more cumbersome. The above patent uses an upper die to punch the panel raw material, punches the panel raw material into an arc, and then continues to press the panel raw material to the lower die through the punching part. At the same time, through the cooperation of the driving part, the punch plate is close to the panel raw material, so that the punch plate punches the arc panel to complete the processing of the double screen panel. The panel is processed in one go through the same device, saving the processing time to solve the problem raised.

[0004] However, although the above patent solution saves processing time, it does not mention the optimized demolding design for the arc structure, and does not consider the lateral sticking force distribution characteristics of the arc surface, which can easily lead to scratches or structural damage on the product surface during the demolding process, and it is difficult to meet the low-loss demolding requirements of the arc double screen.

[0005] For this reason, a kind of arc-shaped double-screen molding injection mold is specially designed to solve the above-mentioned technical problems. Summary of the invention

[0006] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides an arc-shaped double-screen molding injection mold.

[0007] The technical scheme of the present invention is: an arc-shaped double-screen molding injection mold, comprising a lower mold, an upper mold and a positioning column, guide slide grooves are provided on both sides of the lower part of the lower mold, guide sleeves are provided on both sides of the middle of the lower part of the lower mold, a spring is provided on the upper part of the guide sleeve, the upper mold is slidably installed on the upper part of the lower mold, an injection hole is provided in the middle of the upper part of the upper mold, positioning columns are provided on both sides of the lower part of the upper mold, a buffer sleeve is slidably provided in the lower mold corresponding to each positioning column, a spring two is provided between the lower part of the buffer sleeve and the sliding part of the lower mold, a shaping template is slidably provided in the upper part of the lower mold, a contact module is slidably provided in the middle part of the shaping template, a rod-shaped portion is provided inside the contact module, the rod-shaped portion is slidably connected with the inside of the guide sleeve, a spring one is surrounded on the outside of the rod-shaped portion, a lifting group is installed on both sides of the lower part of the shaping template, a spring three is provided between the upper part of the lifting group and the lower part of the shaping template, a demoulding rod is provided at the driving end of the lifting group, and the demoulding rod slides into the shaping template.

[0008] Furthermore, it also includes a linkage frame, a pulling rod, a hinged rod and a disengagement seat. A linkage frame is connected between the lower parts of the two guide sleeves on the same side. A positioning piece is provided in the middle of the lower part of the linkage frame. The positioning piece is slidably connected to the guide slide groove. The lower parts of the two linkage frames are hinged with pulling rods, the lower parts of the two pulling rods are hinged with hinged rods, and a disengagement seat is commonly connected between the two hinged rods. The disengagement seat is slidably connected to the middle part of the contact module.

[0009] Furthermore, limiting grooves are provided on both sides of the middle of the contact module, and limiting blocks are provided at positions corresponding to the limiting grooves on both sides of the middle of the separation seat, and the limiting blocks are slidably connected in the limiting grooves.

[0010] Furthermore, a spring four is included, and a spring four is arranged near the side of the positioning member of the two linkage frames and the inner wall of the lower mold.

[0011] Furthermore, a stabilizing frame is included. The stabilizing frame is arranged in the middle of the lower part of the lower mold. The stabilizing frame covers the outside of the two positioning members. The two positioning members move in the forward direction along the inner side of the stabilizing frame.

[0012] Furthermore, it also includes an electric push rod, a pushing seat, an elastic push block and a spring five. An electric push rod with a driving end facing upward is installed in the middle of the stabilizing frame, a pushing seat is arranged on the driving end of the electric push rod, the pushing seat is slidably connected to the middle part of the detachment seat, an elastic push block is arranged on the upper part of the pushing seat, and a spring five is arranged at the sliding connection between the pushing seat and the detachment seat.

[0013] Furthermore, the top surfaces of the shaping template, the contact module, the disengagement seat and the elastic push block together form a smooth arc surface after the upper mold and the lower mold are closed.

[0014] Furthermore, it also includes an installation cover and a dust blowing pipe. The installation cover is arranged near the rear middle part of the lower mold and the upper mold. The two installation covers are respectively higher than the bottom surface and the top surface of the lower mold and the upper mold. The installation cover is connected to a dust blowing pipe connected to an external dust blowing device.

[0015] Beneficial effects: 1. The elastic cooperation of the positioning column, the buffer sleeve and the spring 2 provides positioning accuracy buffering during the mold closing stage, avoiding mold damage caused by hard contact, and ensuring that the positioning error of the arc surface is reduced; the sliding design of the shaping template and the contact module realizes a small elastic displacement under the injection pressure, compensates for the curvature deviation of the arc surface caused by melt shrinkage, and reduces the product size tolerance; the combination of the demolding rod and the lifting group can perform a symmetrical ejection stroke according to the difference in the sticking force distribution of the arc surface, thereby reducing the demolding resistance.

[0016] 2. The planar four-bar mechanism composed of the linkage frame, the pulling rod and the hinged rod produces an angle change of 12°-15° during mold separation, converting the vertical mold opening movement into the vertical displacement of the separation seat, effectively releasing the lateral clamping force of the edge of the arc surface and reducing the occurrence of demolding scratches.

[0017] 3. The sliding cooperation between the limit groove and the limit block constrains the separation trajectory of the contact module during the movement of the disengagement seat, so that the demoulding angle of the arc surface can be accurately controlled to avoid micro cracks caused by unbalanced loading of the product.

[0018] 4. Spring 4 provides reset preload for the linkage frame, ensuring that each hinged node automatically returns to its original position after mold opening, improving reset accuracy and avoiding extended mold cycle due to mechanism jamming.

[0019] 5. The elastic push block produces a short-distance gradual ejection stroke under the drive of the electric push rod, which stabilizes the peeling speed when the product leaves the contact surface and reduces the risk of ejection stress concentration. The spring buffers the ejection pressure. When the pressure exceeds the limit, it can assist in adjusting the speed of the electric push rod to avoid penetrating the thin-walled area. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the upper mold and the lower mold after closing the present invention.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure after the upper mold and the lower mold of the present invention are opened.

[0022] Figure 3 It is a schematic cross-sectional structure diagram of the lower mold, positioning column, buffer sleeve and other components of the present invention.

[0023] Figure 4 It is a schematic cross-sectional view of the lower mold, linkage frame, and separation seat of the present invention.

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the present invention.

[0025] Figure 6 It is a schematic cross-sectional structure diagram of the lower mold, shaping template, guide sleeve and other components of the present invention.

[0026] Figure 7 The figure is a schematic cross-sectional view of the contact module, guide sleeve, spring and other components of the present invention.

[0027] Figure 8 It is a cross-sectional schematic diagram of the contact module, the disengagement seat and the limiting block of the present invention.

[0028] Fig. 9 It is a schematic cross-sectional structure diagram of the lower mold, contact module, lifting group and other components of the present invention.

[0029] Fig.10 It is a schematic cross-sectional view of the lower mold, linkage frame, electric push rod and other components of the present invention.

[0030] Fig.11 It is a schematic cross-sectional view of the lower mold, the disengagement seat, the electric push rod and other components of the present invention.

[0031] Fig.12 It is a three-dimensional structural schematic diagram of the lower mold, upper mold, installation cover and other components of the present invention.

[0032] Fig.13 It is a three-dimensional structural schematic diagram of the installation cover and the dust blowing pipe of the present invention.

[0033] Marked in the figure: 1-lower mold, 100-guide slide, 101-guide sleeve, 102-spring one, 11-positioning column, 12-buffer sleeve, 13-spring two, 14-shaping template, 141-contact module, 142-limiting groove, 15-linkage frame, 151-pull rod, 152-hinge rod, 16-lifting group, 160-spring three, 161-mold ejection rod, 17-separation seat, 171-limiting block, 18-spring four, 181-stabilizing frame, 19-electric push rod, 191-push seat, 192-elastic push block, 193-spring five, 2-upper mold, 21-injection hole, 3-mounting cover, 31-dust blowing pipe. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope and application scope of the present invention are not limited.

[0035] Embodiment: A curved double screen molding injection mold, such as Figure 1-Figure 12As shown, it includes a lower mold 1, an upper mold 2 and a positioning column 11. The lower mold 1 serves as a mold base, carries a guide mechanism and a molding component, and is integrally formed by machining. Guide grooves 100 are provided on both sides of the lower part of the lower mold 1. The guide grooves 100 are directly formed on the lower mold 1 by milling. Guide sleeves 101 are provided on both sides of the middle of the lower part of the lower mold 1. A spring 102 is provided on the upper part of the guide sleeve 101. The spring 102 is compressed under injection pressure to store rebound energy for surface reset in the demoulding stage. The upper mold 2 is slidably installed on the upper part of the lower mold 1. The upper mold 2 and the lower mold 1 are closed to form a cavity. An injection hole 21 is provided in the middle of the upper part of the upper mold 2. The melt is injected through the injection hole 21. Positioning columns 11 are provided on both sides of the lower part of the upper mold 2. The positioning columns 11 provide mold closing guides. The lower mold 1 corresponds to A buffer sleeve 12 is slidably provided at the lower part of each positioning column 11, and a spring 2 13 is provided between the lower part of the buffer sleeve 12 and the sliding part of the lower mold 1. A shaping template 14 is slidably provided in the upper part of the lower mold 1, and a contact module 141 is slidably provided in the middle part of the shaping template 14. A rod-shaped portion is provided inside the contact module 141, and the rod-shaped portion is slidably connected with the inside of the guide sleeve 101. A spring 102 surrounds the outside of the rod-shaped portion, and the guide sleeve 101 guides the rod-shaped portion of the contact module 141 to move vertically, and cooperates with the spring 102 to achieve elastic compensation. Lifting groups 16 are installed on both sides of the lower part of the shaping template 14, and a spring 3 160 is provided between the upper part of the lifting group 16 and the lower part of the shaping template 14. A demolding rod 161 is provided at the driving end of the lifting group 16, and the demolding rod 161 slides into the interior of the shaping template 14 to perform symmetrical ejection to reduce the risk of product deformation.

[0036] like Figure 2-Figure 10 As shown, it also includes a linkage frame 15, a pulling rod 151, a hinged rod 152 and a separation seat 17. The linkage frame 15 is connected between the lower parts of the two guide sleeves 101 on the same side. A positioning member is provided in the middle of the lower part of the linkage frame 15. The positioning member is slidably connected to the guide slide groove 100. The lower parts of the two linkage frames 15 are hinged with a pulling rod 151. The lower parts of the two pulling rods 151 are hinged with a hinged rod 152. The pulling rod 151 converts the horizontal movement of the linkage frame 15 into the rotation of the hinged rod 152. The two hinged rods 152 are commonly connected with the separation seat 17. The linkage frame 15 converts the vertical movement of the guide sleeve 101 into It switches to horizontal displacement, drives the disengagement seat 17 to unlock the curved surface, and the articulated rod 152 drives the disengagement seat 17 to generate vertical displacement through a swing angle change of 12°-15°, thereby releasing the clamping force of the curved surface, and the disengagement seat 17 is slidably connected with the middle part of the contact module 141; limiting grooves 142 are provided on both sides of the middle part of the contact module 141, and limiting blocks 171 are provided at positions corresponding to the limiting grooves 142 on both sides of the middle part of the disengagement seat 17, and the limiting blocks 171 are slidably connected in the limiting grooves 142, and the limiting grooves 142 and the limiting blocks 171 constrain the moving path of the disengagement seat 17 to ensure stable demoulding and separation of the contact module 141.

[0037] like Fig. 9 and Fig.10 As shown, a spring four 18 is also included. A spring four 18 is arranged near the side of the positioning member of the two linkage frames 15 and the inner wall of the lower mold 1. The spring four 18 provides a lateral preload to ensure that the linkage frames 15 are automatically reset after the mold is opened.

[0038] like Fig. 9 , Fig.10 and Fig.11 As shown, a stabilizing frame 181 is also included. The stabilizing frame 181 is arranged in the middle of the lower part of the lower mold 1. The stabilizing frame 181 covers the outside of the two positioning members. The two positioning members move forward along the inner side of the stabilizing frame 181. The stabilizing frame 181 constrains the positioning members of the linkage frame 15 to prevent movement deviation.

[0039] like Fig. 9 , Fig.10 and Fig.11 As shown, it also includes an electric push rod 19, a push seat 191, an elastic push block 192 and a spring 193. The middle part of the stabilizing frame 181 is equipped with an electric push rod 19 with a driving end facing upward. The driving end of the electric push rod 19 is provided with a push seat 191. The push seat 191 is slidably connected with the middle part of the detachment seat 17. The upper part of the push seat 191 is provided with an elastic push block 192 through an adhesive. The elastic push block 192 adopts a variable stiffness composite material to generate a gradual supporting force during ejection to prevent product indentation. The sliding connection between the push seat 191 and the detachment seat 17 is provided with a spring 193 for buffering the ejection impact. The push seat 191 transmits the thrust of the electric push rod 19, and the flexible contact of the ejection process is realized through the spring 193. The shaping template 14, the contact module 141, the detachment seat 17 and the elastic push block 192 together form a smooth arc surface on the top surface after the upper mold 2 and the lower mold 1 are closed.

[0040] like Fig.12 and Fig.13 As shown, it also includes a mounting cover 3 and a dust blowing pipe 31. The mounting cover 3 is fixed by bolts near the rear middle of the lower mold 1 and the upper mold 2. The mounting cover 3 integrates a pulse dust blowing system. The two mounting covers 3 are respectively higher than the bottom surface and the top surface of the lower mold 1 and the upper mold 2. The mounting cover 3 is connected with a dust blowing pipe 31 connected to an external dust blowing device. The dust blowing pipe 31 is connected to an external air source, and pulse blowing is performed before mold closing. The air duct of the mounting cover 3 can be connected by a quick connector, and the pipeline of the dust blowing pipe 31 adopts a pressure-resistant nylon tube.

[0041] When preparing for mold closing, the electric push rod 19 is in a retracted state, the spring 2 13 pushes the buffer sleeve 12 to the highest point, the positioning column 11 is aligned with the center hole of the buffer sleeve 12, the dust blowing system starts the pulse mode, and the surface of the upper mold 2 and the lower mold 1 cavity is blown through the dust blowing pipe 31 in the mounting cover 3. The upper mold 2 starts to descend under the drive of the hydraulic system, and the positioning column 11 is first inserted into the guide hole of the buffer sleeve 12. At this time, the spring 2 13 provides pre-tightening and buffering. The injection molding machine injects the melt into the upper mold 2 cavity through the injection hole 21. The melt first fills the curved surface compensation area formed by the contact module 141 and the shaping template 14. The contact module 141 is under the action of the melt pressure. The lower compression spring 102 is used to move downward. At this time, the end of the rod-shaped part triggers the first-level limit switch in the guide sleeve 101, and the internal cooling channel of the shaping template 14 is started. The contact module 141 begins to rebound under the action of the spring 102. When the product melt temperature drops, the shaping template 14, the contact module 141, the separation seat 17 and the elastic push block 192 together form a smooth arc surface on the top surface after the upper mold 2 and the lower mold 1 are closed, so that synchronous solidification is achieved at different thickness parts. When demolding, the linkage frame 15 is pre-shifted in the guide slide groove 100 through the positioning piece, and the pull rod 151 drives the hinge rod 152 to form a 12°-15 ° angle, the separation seat 17 and the limiting groove 142 of the contact module 141 generate a pre-separation gap. During the rising process of the upper mold 2, the spring 2 13 is triggered to release when the positioning column 11 and the buffer sleeve 12 are separated. During the descent of the buffer sleeve 12, the linkage frame 15 is driven to move vertically. At this time, the separation seat 17 generates a vertical displacement under the action of the hinge rod 152, and the limiting block 171 slides in the limiting groove 142 to release the curved surface clamping force. When the parting distance is appropriate, the shaping template 14 begins to separate under the drive of the lifting group 16, and the rod-shaped part of the contact module 141 slides along the trajectory of the guide sleeve 101. The position of each demoulding rod 161 is controlled by the curvature compensation algorithm. The shift difference ensures that the arc surface is quickly separated and evenly demoulded. In addition, the electric push rod 19 pushes the elastic push block 192. Under the buffering effect of the spring five 193, the elastic push block 192 contacts the molded product with a suitable gradual stiffness. The demoulding rod 161 is driven by the lifting group 16 to symmetrically eject the molded product to assist in product separation. After completion, the demoulding rod 161 is reset under the action of the spring three 160, and the electric push rod 19 contracts to drive the push seat 191 to reset. The linkage frame 15 returns to the initial position under the action of the spring four 18, and the positioning piece slides in contact with the side of the stabilizing frame 181, and returns to the initial position with the guide slot 100 as the moving guide.

[0042] Although the present disclosure has been described with respect to only a limited number of embodiments, those skilled in the art having benefit of this disclosure will appreciate that various other embodiments can be devised without departing from the scope of the present invention. Accordingly, the scope of the present invention should be limited only by the appended claims.

Claims

1. An arc-shaped double-screen molding injection mold, characterized in that: The invention comprises a lower mold (1), an upper mold (2) and a positioning column (11), wherein guide grooves (100) are provided on both sides of the lower part of the lower mold (1), guide sleeves (101) are provided on both sides of the middle of the lower part of the lower mold (1), a spring (102) is provided on the upper part of the guide sleeve (101), the upper part of the lower mold (1) is slidably mounted with the upper mold (2), an injection hole (21) is provided in the middle of the upper part of the upper mold (2), positioning columns (11) are provided on both sides of the lower part of the upper mold (2), a buffer sleeve (12) is slidably provided in the lower part of the lower mold (1) corresponding to each positioning column (11), and the lower part of the buffer sleeve (12) is slidably connected to the sliding part of the lower mold (1). A spring 2 (13) is arranged between the two sides of the lower part of the shaping template (14). A shaping template (14) is slidably arranged in the upper part of the lower mold (1). A contact module (141) is slidably arranged in the middle part of the shaping template (14). A rod-shaped portion is arranged inside the contact module (141). The rod-shaped portion is slidably connected to the inside of the guide sleeve (101). A spring 1 (102) surrounds the outside of the rod-shaped portion. A lifting group (16) is installed on both sides of the lower part of the shaping template (14). A spring 3 (160) is arranged between the upper part of the lifting group (16) and the lower part of the shaping template (14). A demoulding rod (161) is arranged at the driving end of the lifting group (16). The demoulding rod (161) slides into the inside of the shaping template (14).

2. The arc-shaped double-screen molding injection mold according to claim 1, characterized in that: It also includes a linkage frame (15), a pulling rod (151), a hinged rod (152) and a disengagement seat (17); the linkage frame (15) is connected between the lower parts of the two guide sleeves (101) on the same side; a positioning member is provided at the middle of the lower part of the linkage frame (15); the positioning member is slidably connected to the guide slide groove (100); the lower parts of the two linkage frames (15) are hinged with pulling rods (151); the lower parts of the two pulling rods (151) are hinged with hinged rods (152); the two hinged rods (152) are commonly connected with a disengagement seat (17); the disengagement seat (17) is slidably connected to the middle part of the contact module (141).

3. The arc-shaped double-screen molding injection mold according to claim 2, characterized in that: Limiting grooves (142) are provided on both sides of the middle of the contact module (141), and limiting blocks (171) are provided at positions corresponding to the limiting grooves (142) on both sides of the middle of the separation seat (17), and the limiting blocks (171) are slidably connected in the limiting grooves (142).

4. The arc-shaped double-screen molding injection mold according to claim 3, characterized in that: It also includes a spring four (18), which is arranged near the side of the positioning member of the two linkage frames (15) and the inner wall of the lower mold (1).

5. The arc-shaped double-screen molding injection mold according to claim 4, characterized in that: It also includes a stabilizing frame (181), which is arranged in the middle of the lower part of the lower mold (1), and the stabilizing frame (181) covers the outside of the two positioning members, and the two positioning members move in the forward direction along the inner side of the stabilizing frame (181).

6. The arc-shaped double-screen molding injection mold according to claim 5, characterized in that: It also includes an electric push rod (19), a push seat (191), an elastic push block (192) and a spring five (193). The middle part of the stabilizing frame (181) is equipped with an electric push rod (19) with a driving end facing upward. The driving end of the electric push rod (19) is provided with a push seat (191). The push seat (191) is slidably connected to the middle part of the detachment seat (17). The upper part of the push seat (191) is provided with an elastic push block (192). The sliding connection between the push seat (191) and the detachment seat (17) is provided with a spring five (193).

7. The arc-shaped double-screen molding injection mold according to claim 6, characterized in that: The shaping template (14), the contact module (141), the separation seat (17) and the elastic push block (192) together form a smooth arc surface on the top surface after the upper mold (2) and the lower mold (1) are closed.

8. The arc-shaped double-screen molding injection mold according to claim 7, characterized in that: The invention also comprises a mounting cover (3) and a dust blowing pipe (31), wherein the mounting cover (3) is arranged near the rear middle of the lower mold (1) and the upper mold (2), the two mounting covers (3) are respectively higher than the bottom surface and the top surface of the lower mold (1) and the upper mold (2), and the mounting cover (3) is connected to the dust blowing pipe (31) connected to the external dust blowing equipment.

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