Injection mold and precision injection molding process thereof

Abstract

The application belongs to the technical field of injection molds, and provides an injection mold and a precise injection molding process thereof, which comprise left-right adjusting plates, up-down adjusting plates, diagonal adjusting plates, push rods and telescopic mechanisms. After the mobile phone shell is formed, the inner side is buckled on the frame formed by the four diagonal adjusting plates, the two left-right adjusting plates and the two up-down adjusting plates. By moving the four diagonal adjusting plates, the two left-right adjusting plates and the two up-down adjusting plates, the two left-right adjusting plates and the two up-down adjusting plates are both inclined and moved, and are moved towards each other, the four diagonal adjusting plates are also inclined and moved, and are moved towards each other, so that the size of the frame is inwardly shrunk and reduced compared with the size of the originally formed frame, thereby releasing the buckling restriction on all positions of the inner side of the mobile phone shell, and enabling the mobile phone shell to be completely automatically demolded. The demolding is completed without the aid of external force, the mobile phone shell is not easy to be deformed, the damage to the formed mobile phone shell is reduced, and the yield of the mobile phone shell is improved.

Description

Technical Field

[0001] This invention belongs to the field of injection mold technology, and particularly relates to an injection mold and its precision injection molding process. Background Technology

[0002] Phone cases are external accessories used to protect and decorate mobile phones. Phone cases can be divided into silicone cases, leather cases, plastic cases, and metal cases according to different materials. Currently, silicone cases are the most popular on the market. Silicone cases are made by injection molding. The inner ring of existing silicone phone cases has an inner buckle structure, which will be snapped onto the mold core after the die casting is completed. If the silicone phone case is directly peeled off from the mold core, it may cause the silicone phone case to break.

[0003] To address the aforementioned technical issues, the applicant retrieved some existing technologies, such as patent publication number CN115447085A. Its main technical means is that after the mobile phone protective case inside the injection molding cavity is cooled and formed, an external lifting mechanism ejects the top plate. Movable ejector rods at the four corners of the top plate push four sets of demolding corner blocks upwards simultaneously. Since each set of demolding corner blocks and the core are connected by a sloping sliding connection, the four sets of demolding corner blocks simultaneously retract inwards while driving the protective case upwards, thus disengaging the four sets of demolding corner blocks from the inward locking limit at the four corners of the protective case. Simultaneously, multiple sets of demolding ejector rods rise to eject the remaining parts of the protective case. As the demolding ejector rods rise, a gear and rack mechanism drives multiple sets of side ejector rods to eject the sides of the protective case, causing the sides of the protective case to expand and deform under the action of the side ejector rods, allowing the inward locking structure of the protective case to disengage better. According to the applicant's analysis, the drawbacks of this technical solution are as follows: When the protective sleeve is detached, the side of the core with the core-pulling slider and the opposite side of the core with the core-pulling slider will still limit the inner side of the protective sleeve. When the push rod pushes the protective sleeve, the protective sleeve will be stretched and deformed, resulting in damage to the protective sleeve. At the same time, the side push rod will cause the side of the protective sleeve to expand and deform, which can easily lead to deformation of the protective sleeve before it is fully cooled, resulting in the protective sleeve not meeting the finished product standards. Moreover, when the side push rod is against the side of the protective sleeve, the protective sleeve will move outward a small distance due to the action of the push rod. This can easily cause the push rod to scratch the inner wall of the protective sleeve, resulting in damage to the protective sleeve. Summary of the Invention

[0004] The purpose of this invention is to provide an injection mold and its precision injection molding process, which aims to solve the technical problem in the prior art that the limiting of the inner buckle structure of the protective sleeve cannot be completely released when demolding the protective sleeve, which easily leads to deformation and damage of the protective sleeve.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An injection mold includes a moving mold, a fixed mold, a cavity, an inner template, and a drive mechanism; the mold further includes:

[0007] The left and right adjustment plate has an inclined surface on the left and right sides of the inner template, and a left and right guide block on the inclined surface. The left and right adjustment plate has a left and right guide groove, and the left and right guide groove and the left and right guide block are slidably installed.

[0008] The upper and lower adjustment plate has inclined surfaces on both the upper and lower sides of the inner template, upper and lower guide blocks on the inclined surfaces, and upper and lower guide grooves on the upper and lower adjustment plate, which are slidably installed with the upper and lower guide blocks;

[0009] The diagonal adjustment plate has inclined surfaces three at each of the four diagonal corners of the inner template, and diagonal guide blocks are provided on the inclined surfaces three. The diagonal adjustment plate has diagonal guide grooves, and the diagonal guide grooves and diagonal guide blocks are slidably installed.

[0010] The push rod passes through the fixed mold and connects to the inner template, and is also connected to an external drive device.

[0011] The telescopic mechanism is mounted on the push rod and is connected to the left and right adjustment plates, the up and down adjustment plates and the diagonal adjustment plate respectively. The telescopic mechanism drives the left and right adjustment plates and the up and down adjustment plates to move toward the fixed mold side, and drives the diagonal adjustment plate to move away from the fixed mold side.

[0012] As a preferred embodiment of the above technical solution, the inclination directions of the first and second inclined planes are opposite to the inclination direction of the third inclined plane.

[0013] As a preferred embodiment of the above technical solution, the inner template, two left and right adjustment plates, two up and down adjustment plates, and four diagonal adjustment plates are combined to form a mold core that works with the cavity when casting a mobile phone case.

[0014] As a preferred embodiment of the above technical solution, the telescopic mechanism includes:

[0015] Connecting rod one, the connecting rod one has four parts, and the four connecting rods one are respectively connected to four diagonal adjustment plates;

[0016] Connecting rod two, the connecting rod two has four parts, and the four connecting rod two are respectively connected to two left and right adjustment plates and two up and down adjustment plates;

[0017] One drive board, and the other end of each of the four connecting rods is connected to the drive board.

[0018] Drive board two, and the other end of each of the four connecting rods two is connected to drive board two;

[0019] Telescopic component one and telescopic component two are respectively installed inside the push rod. Drive plate one and drive plate two are respectively installed at the output ends of telescopic component one and telescopic component two. Movable groove one and movable groove two are respectively opened on the push rod. Drive plate one and drive plate two move in movable groove one and movable groove two respectively.

[0020] As a preferred embodiment of the above technical solution, the left and right adjustment plates are provided with an inner groove one, the upper and lower adjustment plates are provided with an inner groove two, the diagonal adjustment plates are provided with an inner groove three, the connecting rod one is slidably connected to the inner groove three, the connecting rod two connecting the left and right adjustment plates is slidably connected to the inner groove one, and the connecting rod two connecting the upper and lower adjustment plates is slidably connected to the inner groove two.

[0021] As a preferred embodiment of the above technical solution, the inner template is provided with a number of air vents on its left, right, upper and lower sides. The air vents include parallel air vents and inclined air vents, which are arranged alternately. A number of parallel air vents are connected to the same air pipe, and a number of inclined air vents are connected to the same air pipe.

[0022] As a preferred embodiment of the above technical solution, the parallel air holes are kept parallel to the inner template, and the inclined air holes are in an inclined state, with their inclination direction facing away from the inner template.

[0023] As a preferred embodiment of the above technical solution, a tray is provided through the moving mold and the fixed mold, and the tray is located below the inner template.

[0024] A precision injection molding process for an injection mold, applied to any of the injection molds described above, includes the following steps:

[0025] Step S1: The drive mechanism drives the moving mold and the fixed mold to close, and pours the raw material into the mold cavity formed by the cavity, inner template, left and right adjustment plates, upper and lower adjustment plates and diagonal adjustment plates. After the raw material is shaped, it forms a mobile phone case.

[0026] Step S2: The drive mechanism drives the moving mold and the fixed mold to separate. The external drive device drives the push rod to move the inner template, left and right adjustment plates, upper and lower adjustment plates and diagonal adjustment plates towards the moving mold, pushing the shaped mobile phone case out of the fixed mold.

[0027] Step S3: By extending and retracting telescopic components one and two, drive plate one moves toward the fixed mold direction, and drive plate two moves away from the fixed mold direction. That is, the four diagonal adjustment plates move toward the moving mold direction, and the two left and right adjustment plates and the two up and down adjustment plates move toward the fixed mold direction, so that the phone case is no longer restricted by the four diagonal adjustment plates, the two left and right adjustment plates and the two up and down adjustment plates.

[0028] Step S4: When the two left and right adjustment plates and the two up and down adjustment plates move, the air vents are exposed. Air is supplied to the air pipe through the external air supply device, so that the parallel air vents blow air outward in parallel, keeping the phone case in a suspended state.

[0029] Step S5: Supply air to air pipe two through external air supply device, causing the tilted air hole to tilt outward and blow air. At the same time, stop supplying air to air pipe one through external air supply device, so that the mobile phone case is blown outward, and the molded mobile phone case falls onto the tray, completing the entire injection molding process.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] 1. In this invention, after the phone case is formed, its inner side is fastened onto a frame formed by four diagonal adjustment plates, two left-right adjustment plates, and two up-down adjustment plates. By moving the four diagonal adjustment plates, the two left-right adjustment plates, and the two up-down adjustment plates, the two left-right adjustment plates and the two up-down adjustment plates are tilted and moved closer to each other. This causes the four diagonal adjustment plates to tilt and move closer to each other, thereby reducing the outer dimensions of the frame to shrink inward compared to the original frame size. This removes the inner fastening restriction on all positions of the phone case, allowing the phone case to be completely and automatically demolded. Demolding is completed without the aid of external force, which makes it less likely for the phone case to deform, reduces damage to the formed phone case, and thus improves the yield of the phone case.

[0032] 2. In this invention, the two left-right adjustment plates, the two up-down adjustment plates, and the four diagonal adjustment plates are separated from the inside of the phone case one after another. This effectively prevents the inner wall of the phone case from sticking to the two left-right adjustment plates, the two up-down adjustment plates, and the four diagonal adjustment plates, thereby effectively preventing damage to the inner wall of the phone case and improving the yield of the finished phone case.

[0033] 3. In this invention, air is supplied through an external air supply device to move the phone case, which was originally hanging on the two diagonal adjustment plates, away from the two diagonal adjustment plates. This ensures that the air output of each parallel air hole is the same, so that the phone case is completely suspended in the air. This also ensures that the air output of each tilted air hole is the same, thereby blowing the phone case off the mold core. This allows for automatic delivery without manual assistance, effectively avoiding damage to the phone case due to external forces or other factors during manual assistance, reducing manual intervention, and improving the automation level and stability of the production line.

[0034] 4. In this invention, the gas blown out from the vent can further cool the formed phone case, improve the effect of the formed phone case, and make the formed phone case less prone to deformation or collapse when it is blown down and impacted. Attached Figure Description

[0035] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 This is a schematic diagram of the structure of the present invention from another perspective;

[0037] Figure 3 This is a schematic diagram of the exploded structure of the mold core;

[0038] Figure 4 This is a schematic diagram of the mold core from its initial state to its deformed state.

[0039] Figure 5 This is a schematic diagram of the telescopic mechanism.

[0040] Figure 6 This is a schematic diagram of the connection structure between the telescopic mechanism and the inner template;

[0041] Figure 7 for Figure 6 Enlarged structural diagram at point A in the middle;

[0042] Figure 8 This is a schematic diagram of the back structure of the mold core;

[0043] Figure 9 This is a top view and side view of the inner template structure.

[0044] In the diagram: 1. Moving mold; 2. Fixed mold; 3. Cavity; 4. Inner mold plate; 41. Angled surface one; 42. Angled surface two; 43. Angled surface three; 44. Vent hole; 441. Parallel vent hole; 442. Inclined vent hole; 5. Left and right adjusting plate; 51. Left and right guide groove; 52. Left and right guide block; 53. Inner groove one; 6. Up and down adjusting plate; 61. Up and down guide groove; 62. Up and down guide block; 63. Inner groove two; 7. Diagonal adjusting plate; 71. Diagonal guide groove; 72. Diagonal guide block; 73. Inward groove three; 8. Push rod; 81. Movable groove one; 82. Movable groove two; 9. Telescopic mechanism; 91. Connecting rod one; 911. Drive plate one; 92. Connecting rod two; 921. Drive plate two; 10. Telescopic component one; 11. Telescopic component two; 12. Drive mechanism; 13. Air pipe one; 14. Air pipe two; 15. Tray; 16. Positioning block; 17. Positioning groove. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0046] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0047] like Figures 1-4As shown, an injection mold includes a moving mold 1, a fixed mold 2, a cavity 3, an inner template 4, and a drive mechanism 12. The mold also includes:

[0048] The left and right adjustment plate 5 and the inner template 4 have inclined surfaces 41 on the left and right sides. The inclined surfaces 41 are provided with left and right guide blocks 52. The left and right adjustment plate 5 has left and right guide grooves 51. The left and right guide grooves 51 and left and right guide blocks 52 are slidably installed together.

[0049] The upper and lower adjustment plate 6 and the inner template 4 are provided with inclined surfaces 42 on the upper and lower sides. The inclined surfaces 42 are provided with upper and lower guide blocks 62. The upper and lower adjustment plate 6 is provided with upper and lower guide grooves 61. The upper and lower guide grooves 61 and the upper and lower guide blocks 62 are slidably installed.

[0050] The diagonal adjustment plate 7 and the inner template 4 are provided with inclined surfaces 43 at the four opposite corners. The inclined surfaces 43 are provided with diagonal guide blocks 72. The diagonal adjustment plate 7 is provided with diagonal guide grooves 71. The diagonal guide grooves 71 and diagonal guide blocks 72 are slidably installed.

[0051] Push rod 8, push rod 8 passes through fixed mold 2 and connects to inner mold plate 4, push rod 8 is connected to external drive equipment;

[0052] Telescopic mechanism 9 is mounted on push rod 8. Telescopic mechanism 9 is connected to left and right adjustment plate 5, up and down adjustment plate 6 and diagonal adjustment plate 7 respectively. Telescopic mechanism 9 drives left and right adjustment plate 5 and up and down adjustment plate 6 to move towards the fixed mold 2. Telescopic mechanism 9 drives diagonal adjustment plate 7 to move away from the fixed mold 2.

[0053] In one embodiment, the drive mechanism 12 is used to drive the moving mold 1 and the fixed mold 2 to close or separate, and can be a cylinder; the external drive device connected to the push rod 8 can be a cylinder, or a component that can drive the push rod 8 to extend and retract; the left and right guide grooves 51 and left and right guide blocks 52, the upper and lower guide grooves 61 and upper and lower guide blocks 62, and the diagonal guide grooves 71 and diagonal guide blocks 72 are all T-shaped.

[0054] In practical application, after the phone case is injection molded, the push rod 8 pushes the inner template 4, left and right adjustment plates 5, up and down adjustment plates 6, and diagonal adjustment plates 7 towards the moving mold 1, pushing the molded phone case out of the fixed mold 2. At this time, the inner side of the phone case is inwardly fastened to the frame formed by the four diagonal adjustment plates 7, two left and right adjustment plates 5, and two up and down adjustment plates 6. The telescopic mechanism 9 moves the two left and right adjustment plates 5 and the two up and down adjustment plates 6 towards the fixed mold 2, and the four diagonal adjustment plates 7 move away from the fixed mold 2. When the two left and right adjustment plates 5 and the two up and down adjustment plates 6 move, they are all tilted. The four diagonal adjustment plates 7 move and move closer together, thus releasing the inward clamping restriction on the four sides of the phone case. When the four diagonal adjustment plates 7 move, they tilt and move closer together, thereby releasing the inward clamping restriction on the four diagonal corners of the phone case. That is, after the four diagonal adjustment plates 7, the two left and right adjustment plates 5, and the two up and down adjustment plates 6 move, their outer dimensions shrink inward compared to the original frame size, thereby releasing the inward clamping restriction on all positions inside the phone case, allowing the phone case to be completely and automatically demolded. In this way, demolding is completed without the help of external force, which makes it less likely for the phone case to deform, reduces damage to the molded phone case, and thus improves the yield of the phone case.

[0055] Meanwhile, compared to existing technologies that release four sets of demolding corner blocks from the inward locking limits at the four corners of the protective sleeve, this method simultaneously elevates multiple sets of demolding ejector pins to eject the remaining parts of the protective sleeve. As the ejector pins rise, a gear and rack mechanism drives multiple sets of side ejector pins to push out the sides of the protective sleeve, causing the sides to expand and deform under the action of the side ejector pins, thus better releasing the inward locking structure on the sides of the protective sleeve. During this process, as the protective sleeve moves, it will move a short distance along the side ejector pins, and the protective sleeve will move relative to the side ejector pins... Moving the rod can easily cause the side top rod to scratch the inner wall of the protective case, resulting in damage. In this invention, the two left-right adjustment plates 5 and the two up-down adjustment plates 6 move first, followed by the four diagonal adjustment plates 7. This allows the two left-right adjustment plates 5, the two up-down adjustment plates 6, and the four diagonal adjustment plates 7 to separate from the inside of the phone case in sequence. This effectively prevents the inner wall of the phone case from sticking to the two left-right adjustment plates 5, the two up-down adjustment plates 6, and the four diagonal adjustment plates 7, thereby effectively preventing damage to the inner wall of the phone case and improving the yield rate of the phone case.

[0056] Furthermore, the inclination directions of inclined plane 1 41 and inclined plane 2 42 are opposite to the inclination direction of inclined plane 3 43.

[0057] In one embodiment, the inclined surfaces 41 and 42 are inclined toward the fixed mold 2, while the inclined surface 43 is inclined away from the fixed mold 2.

[0058] In practical application, the two left-right adjusting plates 5, the two up-down adjusting plates 6, and the four diagonal adjusting plates 7 move along their respective inclined planes 41, 42, and 43, respectively. This causes the two left-right adjusting plates 5, the two up-down adjusting plates 6, and the four diagonal adjusting plates 7 to move inwards, making their external dimensions smaller than the original frame size. This removes the inward clamping restrictions on all positions inside the phone case, allowing the phone case to be completely and automatically demolded. In addition, the two left-right adjusting plates 5 and the two up-down adjusting plates 6 move in the same direction, while the four diagonal adjusting plates 7 move in the opposite direction. This effectively prevents the two left-right adjusting plates 5, the two up-down adjusting plates 6, and the four diagonal adjusting plates 7 from being obstructed during their movement in the same direction, thus ensuring successful demolding.

[0059] Furthermore, the inner template 4, two left and right adjustment plates 5, two up and down adjustment plates 6, and four diagonal adjustment plates 7 are combined to form the mold core used in conjunction with the cavity 3 when casting the mobile phone shell.

[0060] In practical application, the frame formed by the four diagonal adjustment plates 7, the two left-right adjustment plates 5, and the two up-down adjustment plates 6 is identical in shape to the phone case, thus ensuring the shape of the phone case after injection molding. In addition, the frame restricts the inner snap-fit ​​part of the phone case, so the restriction on the inner snap-fit ​​part of the phone case can be removed simply by changing the size of the frame. After all four diagonal adjustment plates 7, the two left-right adjustment plates 5, and the two up-down adjustment plates 6 have moved, the frame deforms, and the overall size of the frame becomes smaller, thereby facilitating the automatic demolding of the phone case.

[0061] like Figures 5-8 As shown, the telescopic mechanism 9 includes:

[0062] Connecting rod 91, there are four connecting rods 91, and the four connecting rods 91 are respectively connected to four diagonal adjustment plates 7;

[0063] Connecting rod 2 92, there are four connecting rods 2 92, and the four connecting rods 2 92 are respectively connected to two left and right adjusting plates 5 and two up and down adjusting plates 6;

[0064] The other end of each of the four connecting rods 91 is connected to the drive board 911.

[0065] Drive board 2921, and the other ends of the four connecting rods 292 are all connected to drive board 2921;

[0066] Telescopic component 10 and telescopic component 21 are respectively installed inside the push rod 8. Drive plate 11 and drive plate 21 are respectively installed at the output ends of telescopic component 10 and telescopic component 21. Movable groove 11 and movable groove 22 are respectively opened on the push rod 8. Drive plate 11 and drive plate 212 move within movable groove 11 and movable groove 22 respectively.

[0067] In one embodiment, the telescopic member 10 can be a cylinder or a component that can drive the drive plate 911 to telescopically move; the telescopic member 11 can be a cylinder or a component that can drive the drive plate 921 to telescopically move.

[0068] In practical application, the telescopic components 10 and 11 drive the drive plates 911 and 921 to move, thereby causing the four connecting rods 91 and 92 to move the two left-right adjusting plates 5, the two up-down adjusting plates 6, and the four diagonal adjusting plates 7, which in turn deforms the frame and reduces the overall size of the frame, making it easier for the phone case to be automatically demolded.

[0069] Furthermore, the left and right adjustment plate 5 has an inner groove 53, the upper and lower adjustment plate 6 has an inner groove 63, the diagonal adjustment plate 7 has an inner groove 73, the connecting rod 91 is slidably connected to the inner groove 73, the connecting rod 92 connecting the left and right adjustment plates 5 is slidably connected to the inner groove 53, and the connecting rod 92 connecting the upper and lower adjustment plates 6 is slidably connected to the inner groove 63.

[0070] In one embodiment, the inner groove 1 53, inner groove 2 63, and inner groove 3 73 are all T-shaped, and the connecting parts of connecting rod 1 91 and connecting rod 2 92 with inner groove 1 53, inner groove 2 63, and inner groove 3 73 are all T-shaped.

[0071] In practical application, when the four connecting rods 91 and 92 move the two left-right adjusting plates 5, the two up-down adjusting plates 6, and the four diagonal adjusting plates 7, the two left-right adjusting plates 5, the two up-down adjusting plates 6, and the four diagonal adjusting plates 7 all move inwards. This causes the two left-right adjusting plates 5, the two up-down adjusting plates 6, and the four diagonal adjusting plates 7 to move relative to the plane of the four connecting rods 91 and 92. At this time, through the inner grooves 53, 63, and 73, the two left-right adjusting plates 5, the two up-down adjusting plates 6, and the four diagonal adjusting plates 7 are not restricted by the four connecting rods 91 and 92 during movement. This ensures the smoothness of the movement of the two left-right adjusting plates 5, the two up-down adjusting plates 6, and the four diagonal adjusting plates 7, thereby ensuring the smoothness of the automatic demolding of the phone case.

[0072] like Figure 4 and Figure 9 As shown, the inner template 4 has several air vents 44 on its left, right, upper and lower sides. The air vents 44 include parallel air vents 441 and inclined air vents 442. The parallel air vents 441 and inclined air vents 442 are arranged alternately. Several parallel air vents 441 are connected to the same air pipe 13, and several inclined air vents 442 are connected to the same air pipe 2 14.

[0073] In one embodiment, both air pipe 13 and air pipe 14 are connected to an external air supply device, which may be an air pump.

[0074] In practical application, after the two left-right adjustment plates 5, the two up-down adjustment plates 6, and the four diagonal adjustment plates 7 have moved, the air vents 44 are exposed. At the same time, the phone case is demolded, and the top of the inner side of the phone case hangs on the two diagonal adjustment plates 7. At this time, air is supplied to the air pipe 13 through the external air supply device. First, air is supplied to the parallel air holes 441 on the inner template 4, so that the phone case is suspended away from the two diagonal adjustment plates 7. Then, air is supplied to the other air vents 44, and the air output of each parallel air hole 441 is the same, so that the phone case is completely suspended. Then, air is supplied to the air pipe 2 through the external air supply device, and the air output of each inclined air hole 442 is the same, so that the phone case is blown off the mold core. In this way, automatic delivery can be completed without manual assistance, effectively avoiding damage to the phone case due to external forces and other factors during manual assistance, reducing manual intervention, and improving the automation and stability of the production line.

[0075] At the same time, the gas blown out from the air outlet 44 can further cool the formed phone case, improve the effect of the formed phone case, and make the formed phone case less likely to deform or collapse when it is blown down and hit.

[0076] Furthermore, the parallel air holes 441 are parallel to the inner template 4, and the inclined air holes 442 are inclined in the direction away from the inner template 4.

[0077] In practical application, when gas is blown out from the several inclined air holes 442, the direction of the gas being blown out is inclined, thereby blowing the phone case away from the fixed mold 2, making the phone case away from the mold core, and completing the demolding.

[0078] like Figure 1 As shown, a tray 15 passes through the moving mold 1 and the fixed mold 2, and the tray 15 is located below the inner template 4.

[0079] In practical application, the phone case blown off will fall onto the tray 15. This not only protects the phone case from falling off, but also allows workers to simply pick up the phone case from the tray 15, avoiding damage to the phone case caused by directly removing it from the mold core.

[0080] The tray 15 passes through the moving mold 1 and the fixed mold 2, which can improve the stability of the moving mold 1 and the fixed mold 2 when they are closed or separated, effectively avoid deviation between the moving mold 1 and the fixed mold 2, and thus ensure the injection molding quality of the mobile phone case. In addition, several positioning blocks 16 are provided on the moving mold 1, and several positioning grooves 17 are provided on the fixed mold 2. The positioning blocks 16 and the positioning grooves 17 work together to further improve the stability and accuracy of the moving mold 1 and the fixed mold 2 when they are closed.

[0081] A precision injection molding process for an injection mold, applied to any of the injection molds described above, includes the following steps:

[0082] Step S1: The drive mechanism 12 drives the moving mold 1 and the fixed mold 2 to close the mold, and pours the raw material into the mold cavity formed by the cavity 3, the inner template 4, the left and right adjustment plate 5, the up and down adjustment plate 6 and the diagonal adjustment plate 7. After the raw material is shaped, it forms a mobile phone case.

[0083] Step S2: The drive mechanism 12 drives the moving mold 1 and the fixed mold 2 to separate. The push rod 8 is driven by the external drive device to move the inner template 4, the left and right adjustment plate 5, the up and down adjustment plate 6 and the diagonal adjustment plate 7 towards the moving mold 1, so as to push the shaped mobile phone case out of the fixed mold 2.

[0084] Step S3: By extending and retracting telescopic components 10 and 11, drive plate 1 911 moves toward the fixed mold 2, and drive plate 2 921 moves away from the fixed mold 2. That is, the four diagonal adjustment plates 7 move toward the moving mold 1, and the two left and right adjustment plates 5 and the two up and down adjustment plates 6 move toward the fixed mold 2, so that the phone case is no longer restricted by the four diagonal adjustment plates 7, the two left and right adjustment plates 5 and the two up and down adjustment plates 6.

[0085] Step S4: When the two left and right adjustment plates 5 and the two up and down adjustment plates 6 move, the air outlet 44 is exposed, and air is supplied to the air pipe 13 through the external air supply device, so that the parallel air outlet 441 blows air outward in parallel, so that the phone case is in a suspended state.

[0086] Step S5: Supply air to air pipe 2 14 through external air supply device, causing the inclined air hole 442 to tilt outward and blow air. At the same time, stop the external air supply device from supplying air to air pipe 1 13, so that the mobile phone case is blown outward, thereby causing the molded mobile phone case to fall onto tray 15, completing the entire injection molding process.

[0087] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An injection mold, comprising a moving mold (1), a fixed mold (2), a cavity (3), an inner template (4), and a drive mechanism (12), characterized in that, The mold also includes: The left and right adjustment plate (5) has inclined surfaces (41) on both sides of the inner template (4), and left and right guide blocks (52) are provided on the inclined surfaces (41). The left and right adjustment plate (5) has left and right guide grooves (51) and the left and right guide grooves (51) and the left and right guide blocks (52) are slidably installed. The upper and lower adjustment plate (6) has inclined surfaces (42) on both the upper and lower sides of the inner template (4), and upper and lower guide blocks (62) are provided on the inclined surfaces (42). The upper and lower adjustment plate (6) has upper and lower guide grooves (61), and the upper and lower guide grooves (61) and the upper and lower guide blocks (62) are slidably installed. The diagonal adjustment plate (7) has inclined surfaces (43) at the four diagonal corners of the inner template (4), diagonal guide blocks (72) on the inclined surfaces (43), and diagonal guide grooves (71) on the diagonal adjustment plate (7). The diagonal guide grooves (71) and diagonal guide blocks (72) are slidably installed. Push rod (8), which passes through the fixed mold (2) and connects to the inner mold plate (4), and is connected to the external driving device; Telescopic mechanism (9), the telescopic mechanism (9) is mounted on push rod (8), the telescopic mechanism (9) is connected to left and right adjustment plate (5), up and down adjustment plate (6) and diagonal adjustment plate (7) respectively, the telescopic mechanism (9) drives left and right adjustment plate (5) and up and down adjustment plate (6) to move toward the fixed mold (2), the telescopic mechanism (9) drives diagonal adjustment plate (7) to move away from the fixed mold (2); The inclination directions of the first (41) and the second (42) slopes are opposite to the inclination direction of the third (43); The telescopic mechanism (9) includes: Connecting rod 1 (91), there are four connecting rods 1 (91), and the four connecting rods 1 (91) are respectively connected to four diagonal adjustment plates (7); Connecting rod two (92), there are four connecting rods two (92), and the four connecting rods two (92) are respectively connected to two left and right adjustment plates (5) and two up and down adjustment plates (6); The other end of each of the four connecting rods is connected to the drive board (911); Drive board 2 (921), and the other ends of the four connecting rods 2 (92) are all connected to drive board 2 (921); Telescopic component one (10) and telescopic component two (11) are installed in the push rod (8). The output ends of the telescopic component one (10) and the telescopic component two (11) are respectively installed with drive plate one (911) and drive plate two (921). The push rod (8) is provided with movable slot one (81) and movable slot two (82). The drive plate one (911) and drive plate two (921) move in the movable slot one (81) and movable slot two (82) respectively.

2. The injection mold according to claim 1, characterized in that: The inner template (4), two left and right adjustment plates (5), two up and down adjustment plates (6) and four diagonal adjustment plates (7) are combined to form a mold core that works with the cavity (3) when casting a mobile phone case.

3. The injection mold according to claim 1, characterized in that: The left and right adjustment plate (5) has an inner groove 1 (53), the upper and lower adjustment plate (6) has an inner groove 2 (63), the diagonal adjustment plate (7) has an inner groove 3 (73), the connecting rod 1 (91) is slidably connected to the inner groove 3 (73), the connecting rod 2 (92) connecting the left and right adjustment plate (5) is slidably connected to the inner groove 1 (53), and the connecting rod 2 (92) connecting the upper and lower adjustment plate (6) is slidably connected to the inner groove 2 (63).

4. The injection mold according to claim 1, characterized in that: The inner template (4) has several air outlets (44) on its left, right, upper and lower sides. The air outlets (44) include parallel air outlets (441) and inclined air outlets (442). The parallel air outlets (441) and inclined air outlets (442) are arranged alternately. Several parallel air outlets (441) are connected to the same air pipe one (13), and several inclined air outlets (442) are connected to the same air pipe two (14).

5. The injection mold according to claim 4, characterized in that: The parallel air holes (441) are parallel to the inner template (4), and the inclined air holes (442) are inclined in the direction away from the inner template (4).

6. The injection mold according to claim 1, characterized in that: A tray (15) is passed through the moving mold (1) and the fixed mold (2), and the tray (15) is located below the inner template (4).

7. A precision injection molding process for an injection mold, characterized in that, Applied to an injection mold as described in any one of claims 1-6, comprising the following steps: Step S1: The driving mechanism (12) drives the moving mold (1) and the fixed mold (2) to close the mold, and pour the raw material into the mold cavity formed by the cavity (3), the inner template (4), the left and right adjustment plate (5), the upper and lower adjustment plate (6) and the diagonal adjustment plate (7). After the raw material is shaped, a mobile phone case is formed. Step S2: The drive mechanism (12) drives the moving mold (1) and the fixed mold (2) to separate. The push rod (8) is driven by the external drive device to move the inner template (4), left and right adjustment plate (5), up and down adjustment plate (6) and diagonal adjustment plate (7) towards the moving mold (1), and push the shaped mobile phone shell out of the fixed mold (2). Step S3: By extending and retracting telescopic component one (10) and telescopic component two (11), drive plate one (911) moves toward the fixed mold (2), and drive plate two (921) moves away from the fixed mold (2). That is, the four diagonal adjustment plates (7) move toward the moving mold (1), and the two left and right adjustment plates (5) and the two up and down adjustment plates (6) move toward the fixed mold (2), so that the phone case is no longer restricted by the four diagonal adjustment plates (7), the two left and right adjustment plates (5) and the two up and down adjustment plates (6). Step S4: When the two left and right adjustment plates (5) and the two up and down adjustment plates (6) move, the air outlet (44) is exposed, and air is supplied to the air pipe (13) through the external air supply device, so that the parallel air hole (441) blows air outward in parallel, so that the mobile phone case is in a suspended state. Step S5: Supply air to the second air pipe (14) through the external air supply device, so that the inclined air hole (442) tilts outward to blow air. At the same time, stop the external air supply device from supplying air to the first air pipe (13), so that the mobile phone case is blown outward, and the molded mobile phone case falls onto the tray (15) to complete the entire injection molding process.

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