Injection mold for magnetic suction air cushion box

Abstract

The invention discloses an injection mold for a magnetic suction air cushion box. The injection mold comprises a lower mold and an upper mold, the lower die comprises a lower die plate and a lower die core with a lower die cavity; the upper die comprises an upper die plate and an upper die core with an upper die cavity; the lower die plate is provided with an inclined boss on the outer side of the lower die core; the upper mold core is provided with a material pushing channel on the outer side of the upper mold cavity; the upper die core is provided with a discharging opening. The upper die plate is elastically provided with a first material pushing sliding block used for being matched with the inclined boss. The first material pushing sliding block is located over the inclined boss. The material pushing channel is slidably provided with a second material pushing sliding block. The second material pushing slide block is elastically connected with the first material pushing slide block; the upper die core is further provided with a material blocking sliding block in an elastic floating mode. The upper template is provided with a driving assembly; the driving assembly is matched with the inclined face of the material blocking sliding block so as to drive the material blocking sliding block to close and open the discharging opening. The production cost is reduced, the mounting precision and firmness of the magnetic attraction block are improved, the product quality and consistency are improved, automatic production is facilitated, and the large-scale manufacturing requirement is met.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molds, and more particularly to an injection mold for a magnetic suction cushion box. Background Art

[0002] The existing production process of magnetic suction cushion boxes usually adopts the method of manually installing magnetic suction blocks, that is, after the plastic parts are injection-molded, the magnetic suction blocks are fixed at the specified positions by bonding, buckling or press-fitting.

[0003] However, it is difficult to ensure the position accuracy of the magnetic suction blocks during the manual installation process, which easily leads to uneven magnetic suction force and affects the closing effect of the box cover and the box body; secondly, manual assembly increases the production steps, resulting in low overall production efficiency and being unfavorable for large-scale automated production; in addition, due to the different materials of the magnetic suction blocks and the plastic parts, loosening or falling off may occur during subsequent use, resulting in a decrease in the durability of the product and affecting the user experience. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned disadvantages and provide an injection mold for a magnetic suction cushion box, which realizes the high-precision positioning of the magnetic suction blocks and avoids the influence on the function of the cushion box due to loosening or falling off.

[0005] To achieve the above purpose, the specific scheme of the present invention is as follows:

[0006] An injection mold for a magnetic suction cushion box, comprising a lower mold and an upper mold; the lower mold includes a lower template and a lower mold core with a lower mold cavity; the upper mold includes an upper template and an upper mold core with an upper mold cavity;

[0007] The lower template is provided with an inclined boss on the outside of the lower mold core;

[0008] The upper mold core is provided with a material pushing channel on the outside of the upper mold cavity; the upper mold core is also provided with a material discharging port for communicating the material pushing channel with the upper mold cavity; the upper template is elastically provided with a first material pushing slider for cooperating with the inclined boss at a position corresponding to the material pushing channel; the first material pushing slider is located directly above the inclined boss; a second material pushing slider is slidably arranged in the material pushing channel; the second material pushing slider is elastically connected to the first material pushing slider; the upper mold core is also elastically and floatingly provided with a material blocking slider; the upper template is provided with a driving component; the driving component is in inclined surface cooperation with the material blocking slider to drive the material blocking slider to close and open the material discharging port.

[0009] Optionally, the material blocking slider is provided with a driving arm and a material blocking boss; the driving arm is in inclined surface cooperation with the driving component; the material blocking boss is used for closing and opening the material discharging port.

[0010] Optionally, a first spring is connected between the material blocking slider and the upper mold core.

[0011] Optionally, the driving assembly includes a driving slider and a driving rod movably disposed on the upper template. The driving slider is provided with a driving groove. A second spring is connected between the side of the driving slider away from the material blocking slider and the upper template. The rigidity of the second spring is greater than that of the first spring. The driving slider is in inclined surface fit with the material blocking slider.

[0012] An upper end of the driving rod is elastically and floatingly provided with a floating pin. A third spring is connected between the driving rod and the driving slider. The floating pin is movably embedded in the driving groove. A lower end of the driving rod can movably penetrate downward through the upper template.

[0013] Optionally, the driving groove includes a vertical section, a first inclined section and a second inclined section. An upper end of the vertical section is connected to an upper end of the first inclined section. A lower end of the first inclined section is connected to an upper end of the second inclined section. A lower end of the second inclined section is connected to a middle part of the vertical section. The depth of the first inclined section is greater than that of the vertical section. The depth of an upper end of the second inclined section is the same as that of the first inclined section. The depth of a lower end of the second inclined section is less than that of the vertical section. A transition step is provided in the second inclined section.

[0014] Optionally, a tension spring is connected between an end of the first material pushing slider away from the second material pushing slider and the upper template. A fourth spring is connected between the first material pushing slider and the second material pushing slider.

[0015] Optionally, both the upper template and the upper mold core are provided with a feeding channel, and the feeding channel is vertically connected to the material pushing channel. An upper end of the feeding channel penetrates upward through the upper mold core.

[0016] Optionally, two groups of driving assemblies are spaced on the upper template. The two groups of driving assemblies are distributed on two sides of the first material pushing slider. The material blocking slider is provided with two driving arms arranged side by side at intervals. The two driving arms are respectively in inclined surface fit with the two groups of driving assemblies one by one.

[0017] Optionally, a through hole for inserting the inclined boss into the upper template is provided on the bottom surface of the upper template directly above the inclined boss to drive the first material pushing slider to slide.

[0018] Optionally, the number of the inclined bosses is two, and the number of the through holes is two.

[0019] The beneficial effects of the present invention are as follows: in the injection molding process, the magnetic attraction block is directly and accurately embedded into the plastic part without manual intervention, realizing high-precision positioning of the magnetic attraction block, effectively reducing the manual assembly link, reducing the production cost, and also improving the installation accuracy and firmness of the magnetic attraction block, avoiding the influence on the function of the air cushion box caused by loosening or falling off, thereby improving the product quality and consistency, further facilitating automated production, meeting the large-scale manufacturing requirements, and providing a more efficient and stable solution for the production of the magnetic air cushion box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present invention;

[0021] Figure 2 is a schematic cross-sectional view when the molds of the present invention are closed;

[0022] Figure 3 is Figure 2 a partially enlarged schematic view of part A in

[0023] Figure 4 is a partial cross-sectional view of the present invention when the material blocking boss opens the blanking port;

[0024] Figure 5 is a partial cross-sectional view of the present invention after the second injection molding;

[0025] Figure 6 is a partial cross-sectional view of the present invention after the third injection molding;

[0026] Figure 7 is a schematic structural diagram of the lower mold of the present invention;

[0027] Figure 8 is a schematic structural diagram of the upper mold of the present invention;

[0028] Figure 9 is Figure 8 a partially enlarged schematic view of part B in

[0029] Figure 10 is a cross-sectional view of the upper mold of the present invention from the first perspective;

[0030] Figure 11 is a cross-sectional view of the upper mold of the present invention from the second perspective;

[0031] Figure 12 Figure 11 a partially enlarged schematic view of part C in

[0032] Figure 13 is a cross-sectional view of the upper mold of the present invention from the third perspective;

[0033] Figure 14 is a partial structural diagram of the upper mold of the present invention;

[0034] Figure 15 is a partial structural diagram of the driving slider of the present invention;

[0035] Figure 16 is a cross-sectional view of the driving rod of the present invention;

[0036] Description of reference numerals: 1. Lower mold; 11. Lower template; 111. Guide rod; 112. Inclined boss; 12. Lower mold core; 131. Cylinder; 132. Ejector rod; 2. Upper mold; 21. Upper template; 211. Through hole; 212. Guide hole; 22. Upper mold core; 221. Material discharging port; 23. First pushing slider; 231. Tension spring; 24. Second pushing slider; 241. Fourth spring; 25. Material blocking slider; 251. Driving arm; 252. Material blocking boss; 253. First spring; 261. Driving slider; 262. Driving rod; 2631. Vertical section; 2632. First inclined section; 2633. Second inclined section; 264. Second spring; 265. Floating pin; 266. Third spring; 27. Feeding channel; 28. Spraying device; 29. Ejector plate; 291. Pressing table; 292. Pressing arm; 293. Fifth spring. Detailed implementation manners

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the implementation scope of the present invention is not limited thereto.

[0038] As Figures 1 to 16 shown, an injection mold for a magnetic air cushion box according to this embodiment includes a lower mold 1 and an upper mold 2; the lower mold 1 includes a lower template 11 and a lower mold core 12 having a lower mold cavity; the upper mold 2 includes an upper template 21 and an upper mold core 22 having an upper mold cavity;

[0039] The lower template 11 is provided with a guide rod 111, and the upper template 21 is provided with a guide hole 212. The guide rod 111 movably penetrates through the guide hole 212 to provide guidance and limit when the upper mold 2 and the lower mold 1 are closed, so that the closing of the upper mold 2 and the lower mold 1 is more stable; the upper mold core 22 is further provided with a spraying device 28 for injecting injection materials.

[0040] The lower template 11 is provided with an inclined boss 112 outside the lower mold core 12, and a first inclined surface is provided on the top surface of the inclined boss 112; the upper mold core 22 is provided with a pushing channel outside the upper mold cavity; the upper mold core 22 is further provided with a material discharging port 221 for communicating the pushing channel with the upper mold cavity; the upper template 21 is elastically provided with a first pushing slider 23 for cooperating with the inclined boss 112 at a position corresponding to the pushing channel; the first pushing slider 23 is located directly above the inclined boss 112; a second pushing slider 24 is slidably arranged in the pushing channel; the second pushing slider 24 is elastically connected to the first pushing slider 23; the upper mold core 22 is further elastically and floatingly provided with a material blocking slider 25; the upper template 21 is provided with a driving assembly; the driving assembly is in inclined surface cooperation with the material blocking slider 25 to drive the material blocking slider 25 to close and open the material discharging port 221; preferably, a second inclined surface is provided on the driving assembly, and a third inclined surface is provided on the material blocking slider 25.

[0041] Specifically, when the injection mold for the magnetic suction cushion box of this embodiment is in its initial state, the driving component cooperates with the second inclined surface and the third inclined surface to close the material discharge port 221 by the material blocking slider 25, as Figure 3 shown; during actual use, the magnetic suction block is placed in the material pushing channel. At this time, due to the blocking of the material blocking slider 25, the magnetic suction block cannot enter the material discharge port 221 under the action of the first material pushing slider 23 and the second material pushing slider 24; then the upper mold 2 and the lower mold 1 are clamped together, so that the upper mold cavity and the lower mold cavity form the first mold cavity. The inclined boss 112 squeezes the first material pushing slider 23 to slide relative to the second material pushing slider 24 through the first inclined surface. After clamping, the spraying device 28 injects the first layer of injection material into the first mold cavity. After cooling, the first injection layer is formed, as Figure 4 shown, as the preliminary structure of the cushion box, thus completing the first injection molding;

[0042] When the first injection layer is cooled, the upper mold 2 moves up a certain distance. At this time, a second mold cavity is formed between the upper mold cavity and the first injection layer. During the upward movement of the upper mold 2, the driving component cooperates with the second inclined surface and the third inclined surface to move the material blocking slider 25 upward, thereby opening the material discharge port 221, as Figure 4 shown. At this time, the magnetic suction block in the material pushing channel enters the material discharge port 221 under the push of the second material pushing slider 24, falls onto the top surface of the first injection layer through the material discharge port 221. Then the driving component moves the material blocking slider 25 downward to close the material discharge port 221. At the same time, the material blocking slider 25 lightly presses the magnetic suction block, so that the magnetic suction block is stably pressed against the top surface of the first injection layer to ensure that the magnetic suction block will not move during the injection process. At the same time, by moving the material blocking slider 25 up and down, it is ensured that the magnetic suction block can reliably pass through the material discharge port 221 and then support on the first injection layer, avoiding the phenomenon of the magnetic suction block getting stuck, and the structural reliability is higher; at this time, the spraying device 28 injects the second layer of injection material into the second mold cavity. The second layer of injection material wraps the magnetic suction block, so that the magnetic suction block is firmly fixed in the predetermined position, as Figure 5 shown, making the position accuracy of the magnetic suction block higher, and finally forming the second injection layer, effectively enhancing the stability of the magnetic suction block, thus completing the second injection molding;

[0043] When the second injection layer is cooled, the upper mold 2 moves up a certain distance again. The driving component makes the material blocking slider 25 keep the material discharge port 221 closed, and the first material pushing slider 23 and the second material pushing slider 24 are reset. At this time, the second injection layer and the upper mold cavity form a third mold cavity. The spraying device 28 injects the third layer of injection material into the third mold cavity to form the third injection layer, completely wrapping the magnetic suction block, and completing the third injection molding, as Figure 6 shown, thus becoming the magnetic suction cushion box product, so as to completely avoid the magnetic suction block from loosening or falling off during use, and improve the durability and service life of the product.

[0044] It should be noted that during the second injection molding, the upward movement distance of the upper mold 2 is the height of the second injection layer, and during the third injection molding, the upward movement distance of the upper mold 2 is the height of the third injection layer.

[0045] In this embodiment, the magnetic attraction block is accurately embedded into the plastic part directly during the injection molding process without manual intervention, realizing the high-precision positioning of the magnetic attraction block, effectively reducing the manual assembly link, reducing the production cost, and improving the installation accuracy and firmness of the magnetic attraction block, thereby improving the product quality and consistency, further facilitating the automated production, meeting the large-scale manufacturing requirements, and providing a more efficient and stable solution for the production of the magnetic air cushion box.

[0046] As Figure 14 shown, in some embodiments of the injection mold for the magnetic air cushion box of this embodiment, the material blocking slider 25 is provided with a driving arm 251 and a material blocking boss 252; the driving arm 251 is in inclined surface fit with the driving component; the material blocking boss 252 is used to close and open the blanking port 221; specifically, a third inclined surface is arranged at the end of the driving arm 251 far from the material blocking boss 252, the material blocking boss 252 is cylindrical, the material blocking boss 252 is arranged on the bottom surface of the material blocking slider 25, the blanking port 221 is circular, and the magnetic attraction block is cylindrical. As Figure 14 shown, in some embodiments of the injection mold for the magnetic air cushion box of this embodiment, a first spring 253 is connected between the material blocking slider 25 and the upper mold core 22; initially, the driving component applies a downward pressure to the material blocking slider 25 through the second inclined surface and the third inclined surface, so that the material blocking boss 252 is inserted into the blanking port 221, thereby closing the blanking port 221, and the first spring 253 is in a compressed state; when the driving component gradually releases the pressure on the material blocking slider 25, the first spring 253 gradually resets, thereby pushing the material blocking slider 25 to move upward, so that the material blocking boss 252 moves out of the blanking port 221, enabling the magnetic attraction block in the material pushing channel to enter the blanking port 221 under the action of the second material pushing slider 24; when the driving component applies pressure to the material blocking slider 25 again, the material blocking boss 252 is inserted into the blanking port 221 again, thereby pressing the magnetic attraction block on the first injection layer, making the position of the magnetic attraction block firmly fixed and ensuring the position accuracy of the magnetic attraction block.

[0047] As Figure 12 、 Figures 14 to 16As shown, in some embodiments, the injection mold for the magnetic suction cushion box of this embodiment, the driving assembly includes a driving slider 261 and a driving rod 262 movably arranged on the upper template 21. The driving slider 261 is provided with a driving groove; a second spring 264 is connected between the side of the driving slider 261 away from the material blocking slider 25 and the upper template 21; the rigidity of the second spring 264 is greater than that of the first spring 253. The driving slider 261 is in inclined surface cooperation with the material blocking slider 25; a floating pin 265 is elastically floatingly arranged at the upper end of the driving rod 262; a third spring 266 is connected between the driving rod 262 and the driving slider 261; the floating pin 265 is movably embedded in the driving groove; the lower end of the driving rod 262 can move downward through the upper template 21. As Figure 15 As shown, in some embodiments, the injection mold for the magnetic suction cushion box of this embodiment, the driving groove includes a vertical section 2631, a first inclined section 2632 and a second inclined section 2633; the upper end of the vertical section 2631 is connected to the upper end of the first inclination; the lower end of the first inclined section 2632 is connected to the upper end of the second inclined section 2633; the lower end of the second inclined section 2633 is connected to the middle of the vertical section 2631; the depth of the first inclined section 2632 is greater than the depth of the vertical section 2631; the depth of the upper end of the second inclined section 2633 is the same as the depth of the first inclined section 2632; the depth of the lower end of the second inclined section 2633 is less than the depth of the vertical section 2631; a transition step is provided in the second inclined section 2633.

[0048] Specifically, initially, the driving rod 262 extends out of the upper template 21 under the action of the third spring 266. The floating pin 265 is located at the lower end of the vertical section 2631. The second spring 264 exerts an elastic force on the driving slider 261, so that the driving slider 261 exerts a pressure on the material blocking slider 25 through the cooperation of the second inclined surface and the third inclined surface, so that the first spring 253 is compressed, and the material blocking boss 252 is inserted into the blanking port 221; when the mold is closed, the driving rod 262 contacts the lower template 11 and is extruded by the lower template 11 and moves upward. The floating pin 265 moves along the vertical section 2631 until the floating pin 265 moves to the upper end point of the vertical section 2631 and enters the first inclined section 2632. At this time, the upper mold 2 and the lower mold 1 are completely closed, as Figure 2 shown; when the first injection molding is completed, the upper mold 2 moves upward. At this time, the floating pin 265 moves along the first inclined section 2632, so that the driving slider 261 moves away from the material blocking slider 25. The second spring 264 is compressed. The first spring 253 pushes the material blocking slider 25 upward until the material blocking boss 252 opens the blanking port 221, and the magnetic suction block enters the blanking port 221, as Figure 3 and Figure 4As shown, while the floating pin 265 enters the second inclined section 2633 from the first inclined section 2632. As the upper mold 2 continues to move upward, the floating pin 265 moves along the second inclined section 2633, and the third spring 266 pushes the driving rod 262 to extend downward. At this time, the second spring 264 pushes the driving slider 261 towards the blanking slider 25. Until the upper mold 2 moves upward in place, the floating pin 265 returns to the vertical section 2631 from the second inclined section 2633 again. At this time, the driving slider 261 makes the blanking boss 252 of the blanking slider 25 insert into the blanking port 221 again, so as to press the magnetic attraction block, as Figure 5 shown, to keep the position of the magnetic attraction block stable, and then the second injection molding is carried out; during the third injection molding, the upper mold 2 moves upward, the floating pin 265 moves downward along the vertical section 2631, and the third spring 266 continues to push the driving rod 262 to extend downward until the floating pin 265 returns to the lower end point position of the vertical section 2631, and then the molding of the third injection layer is carried out.

[0049] Through the above settings, the blanking boss 252 can automatically open the blanking port 221, and after the magnetic attraction block enters the blanking port 221, it can automatically close the blanking port 221 and press and fix the magnetic attraction block, so as to ensure the stable position of the magnetic attraction block during the injection molding process.

[0050] As Figure 15 and Figure 16 shown, in this embodiment, the driving slider 261 includes two relatively arranged slider bodies. The inner side wall of each slider body is provided with an avoidance groove, and each avoidance groove is provided with a driving groove. The driving rod 262 movably penetrates between the two slider bodies. The floating pins 265 are elastically and floatingly arranged on both sides of the driving rod 262, and the floating pins 265 are movably embedded into the corresponding driving grooves; with such a setting, so that the driving rod 262 can reliably make the driving slider 261 slide against the elastic force of the second spring 264.

[0051] As Figures 2 to 6 shown, in some embodiments of the injection mold for the magnetic air cushion box in this embodiment, a tension spring 231 is connected between one end of the first blanking slider 23 away from the second blanking slider 24 and the upper template 21; the first blanking slider 23 and the second blanking slider 24 are connected with a fourth spring 241. Specifically, initially, the tension spring 231 is in a natural state, and the fourth spring 241 is in a natural state.

[0052] After the first pushing slider 23 contacts the first inclined surface of the inclined boss 112, as the lower mold 1 moves downward, the inclined boss 112 applies a thrust to the first pushing slider 23, causing the first pushing slider 23 to slide toward the material discharge port 221 against the tension of the tension spring 231. The first pushing slider 23 pushes the second pushing slider 24 to move in the material pushing channel through the fourth spring 241, and the second pushing slider 24 pushes the magnetic attraction block to move. Since the material blocking boss 252 closes the material discharge port 221, the magnetic attraction block is blocked, causing the fourth spring 241 to be compressed until the upper mold 2 and the lower mold 1 are closed, and the inclined boss 112 restricts the first pushing slider 23, keeping the tension spring 231 stretched; when the material blocking boss 252 opens the material discharge port 221, since the first pushing slider 23 is restricted, the fourth spring 241 pushes the second pushing slider 24 to slide, thereby pushing the magnetic attraction block into the material discharge port 221, as Figure 4 shown, realizing the automatic material discharging operation of the magnetic attraction block;

[0053] As the upper mold 2 moves upward until the inclined boss 112 releases the restriction on the first pushing slider 23, the tension spring 231 resets, driving the first pushing slider 23 to move away from the material discharge port 221. The first pushing slider 23 drives the second pushing slider 24 to move synchronously through the fourth spring 241.

[0054] As Figures 2 to 6 、 Figure 10 shown, in some embodiments, the upper template 21 and the upper mold core 22 of the injection mold for the magnetic attraction cushion box of this embodiment are both provided with a material feeding channel 27, and the material feeding channel 27 is vertically connected to the material pushing channel; the upper end of the material feeding channel 27 penetrates upward through the upper mold core 22. Specifically, during use, the magnetic attraction blocks are stacked in the material feeding channel 27. After the second pushing slider 24 resets, the next magnetic attraction block enters the material pushing channel from the material feeding channel 27, thereby performing the injection molding of the next magnetic attraction cushion box, thus realizing continuous production and improving production efficiency.

[0055] As Figure 14 shown, in some embodiments, the upper template 21 of the injection mold for the magnetic attraction cushion box of this embodiment is provided with two sets of driving components at intervals; the two sets of driving components are distributed on both sides of the first pushing slider 23; as Figure 14 shown, the material blocking slider 25 is provided with two driving arms 251 arranged side by side at intervals; the two driving arms 251 are respectively in inclined surface cooperation with the two sets of driving components. Specifically, the material blocking slider 25 is generally in a U-shaped structure. By setting the two sets of driving components and the two driving arms 251 to cooperate with each other, the material blocking slider 25 can be reliably driven to move up and down to ensure the material discharging and pressing actions of the magnetic attraction block, further improving the reliability of the overall structure.

[0056] As Figure 8 andFigure 9 As shown in the figure, in some embodiments, for the injection mold of the magnetic suction cushion box of this embodiment, on the bottom surface of the upper template 21, a through hole 211 for the inclined boss 112 to insert into the upper template 21 is provided directly above the inclined boss 112 to drive the first pushing slider 23 to slide. Specifically, during mold clamping, the inclined boss 112 inserts into the through hole 211, and thus is extruded through the first inclined surface, causing the first pushing slider 23 to slide against the tension of the tension spring 231. Until after the first pushing slider 23 disengages from the first inclined surface, the inclined boss 112 is completely inserted into the through hole 211. At this time, the vertical wall of the inclined boss 112 abuts against the first pushing slider 23, thereby restricting the first pushing slider 23 and keeping the tension spring 231 in a stretched state.

[0057] As Figure 1 and Figure 7 As shown in the figure, in some embodiments, for the injection mold of the magnetic suction cushion box of this embodiment, the number of the inclined bosses 112 is two; the number of the through holes 211 is two. Such a setting is for the first pushing slider 23 to move more stably.

[0058] As Figure 2 and Figure 7 As shown in the figure, in some embodiments, for the injection mold of the magnetic suction cushion box of this embodiment, the lower template 11 is further provided with a blanking assembly that can penetrate the lower mold core 12; after injection molding is completed, the blanking assembly ejects the injection-molded magnetic suction cushion box product out of the lower mold cavity.

[0059] Specifically, the number of the blanking assemblies is set to be multiple, and the multiple blanking assemblies are distributed at intervals to reliably eject the formed magnetic suction cushion box product out of the lower mold cavity, such as setting the number to be four.

[0060] Exemplarily, as Figure 2 shown in the figure, the blanking assembly includes a cylinder 131 and an ejector rod 132; the cylinder 131 is fixed on the lower template 11, the lower end of the ejector rod 132 is connected to the cylinder 131, and the upper end of the ejector rod 132 penetrates the lower mold core 12. Initially, the top surface of the ejector rod 132 is flush with the surface of the lower mold cavity. When product blanking is required, the cylinder 131 drives the ejector rod 132 to extend into the lower mold cavity, thereby ejecting the magnetic suction cushion box product out of the lower mold cavity.

[0061] As Figure 8 and Figure 13As shown, in the injection mold for a magnetic suction cushion box according to this embodiment, in some embodiments, the ejector plate 29 is elastically and floatingly connected to the upper mold core 22. After mold clamping, the top surface of the ejector plate 29 contacts the bottom surface of the upper mold core 22 so that the upper mold core 22 and the lower mold core 12 are clamped to form the first mold cavity; when the upper template 21 moves upward, the ejector plate 29 applies pressure to the formed first injection layer so that the first injection layer remains in the lower mold cavity, thus preventing the first injection layer from moving upward synchronously with the upper mold 2.

[0062] Specifically, as Figure 13 shown, a central column is provided at the center of the top surface of the ejector plate 29. The central column slidably penetrates into the lower mold core 12. A plurality of radially extending pressing arms 292 are connected to the outer peripheral wall of the central column. The number of the pressing arms 292 can be set to four. The four pressing arms 292 are distributed in a cross shape. A pressing platform 291 protruding from the bottom surface of the upper mold core 22 is provided at the end of each pressing arm 292. A fifth spring 293 is connected between each pressing arm 292 and the inner wall of the upper mold core 22; thus, through the fifth spring 293, the pressing platform 291 protrudes from the bottom surface of the upper mold core 22, so that during mold clamping, the pressing platform 291 contacts the top surface of the lower mold core 12, compressing the fifth spring 293, and thus applying pressure to the formed first injection layer by the elastic force of the fifth spring 293.

[0063] The above are only the preferred embodiments of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features, and principles described in the scope of the patent application of the present invention are included in the protection scope of the patent application of the present invention.

Claims

1. An injection mold for a magnetic air cushion box, comprising a lower mold and an upper mold; the lower mold comprises a lower mold plate and a lower mold core having a lower mold cavity; the upper mold comprises an upper mold plate and an upper mold core having an upper mold cavity; the characteristics are: The lower mold plate is provided with an inclined boss on the outer side of the lower mold core; The upper mold core is provided with a pushing channel on the outer side of the upper mold cavity; the upper mold core is also provided with a discharge port connecting the pushing channel with the upper mold cavity; the upper template is elastically provided with a first pushing slider for cooperating with the inclined boss at the position corresponding to the pushing channel; the first pushing slider is located directly above the inclined boss; the pushing channel is slidably provided with a second pushing slider; the second pushing slider is elastically connected to the first pushing slider; the upper mold core is also elastically floatingly provided with a blocking slider; the upper template is provided with a driving assembly; the driving assembly cooperates with the inclined surface of the blocking slider to drive the blocking slider to close and open the discharge port.

2. The injection mold for a magnetic air cushion box according to claim 1, characterized in that: The material-blocking slide block is provided with a driving arm and a material-blocking boss; the driving arm cooperates with the inclined surface of the driving component; the material-blocking boss is used to close and open the material discharge port.

3. The injection mold for a magnetic air cushion box according to claim 1, characterized in that: A first spring is connected between the material blocking sliding block and the upper die core.

4. The injection mold for a magnetic air cushion box according to claim 1, characterized in that: The driving assembly comprises a driving slider and a driving rod movably arranged on the upper template, the driving slider is provided with a driving slot; a second spring is connected between the side of the driving slider away from the material blocking slider and the upper template; the rigidity of the second spring is greater than that of the first spring; the driving slider cooperates with the inclined surface of the material blocking slider; The upper end of the driving rod is elastically floated and provided with a floating pin; a third spring is connected between the driving rod and the driving slider; the floating pin is movably embedded in the driving groove; the lower end of the driving rod can move downward to pass through the upper template.

5. The injection mold for a magnetic air cushion box according to claim 4, characterized in that: The driving groove includes a vertical section, a first inclined section and a second inclined section; the upper end of the vertical section is connected to the upper end of the first inclined section; the lower end of the first inclined section is connected to the upper end of the second inclined section; the lower end of the second inclined section is connected to the middle of the vertical section; the depth of the first inclined section is greater than the depth of the vertical section; the depth of the upper end of the second inclined section is the same as the depth of the first inclined section; the depth of the lower end of the second inclined section is less than the depth of the vertical section; and a transition step is provided in the second inclined section.

6. The injection mold for a magnetic air cushion box according to claim 1, characterized in that: A tension spring is connected between one end of the first pushing slider away from the second pushing slider and the upper template; a fourth spring is connected to the first pushing slider and the second pushing slider.

7. The injection mold for a magnetic air cushion box according to claim 1, characterized in that: The upper mold plate and the upper mold core are both provided with a feeding channel, and the feeding channel is vertically connected to the pushing channel; the upper end of the feeding channel penetrates the upper mold core upward.

8. The injection mold for a magnetic air cushion box according to claim 2, characterized in that: The upper template is provided with two groups of driving components at intervals; the two groups of driving components are distributed on both sides of the first pushing slide block; the blocking slide block is provided with two driving arms arranged side by side at intervals; the two driving arms are respectively matched with the inclined surfaces of the two groups of driving components in a one-to-one correspondence.

9. The injection mold for a magnetic air cushion box according to claim 1, characterized in that: The bottom surface of the upper template is provided with a through hole for the inclined boss to be inserted into the upper template just above the inclined boss, so as to drive the first material pushing sliding block to slide.

10. The injection mold for a magnetic air cushion box according to claim 9, characterized in that: The number of the inclined bosses is two; the number of the through holes is two.

Images