An injection mold for a magnetic air cushion box

Abstract

The present invention discloses an injection mold for a magnetic air cushion box, comprising a lower mold and an upper mold; the lower mold comprises a lower template and a lower mold core having a lower mold cavity; the upper mold comprises an upper template and an upper mold core having an upper mold cavity; the lower template 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 provided with a discharge port; the upper template is elastically provided with a first pushing slider for cooperating with the inclined boss; the first pushing slider is located directly above the inclined boss; the pushing channel is slidingly 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; the production cost is reduced, the installation accuracy and firmness of the magnetic block are improved, the product quality and consistency are improved, it is conducive to automated production, and large-scale manufacturing needs are met.

Description

Technical Field

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

[0002] The existing production process of magnetic air cushion boxes usually adopts the method of manually installing magnetic blocks, that is, after the plastic parts are injection molded, the magnetic blocks are fixed in a specified position by bonding, snapping or pressing.

[0003] However, it is difficult to ensure the positioning accuracy of the magnetic block during manual installation, which can easily lead to uneven magnetic attraction and affect the closing effect of the box lid and the box body; secondly, manual assembly increases the production steps, making the overall production efficiency low and not conducive to large-scale automated production; in addition, since the magnetic block and the plastic parts are made of different materials, they may become loose or fall off during subsequent use, resulting in reduced product durability and affecting user experience. Summary of the Invention

[0004] The object of the present invention is to overcome the above-mentioned shortcomings and provide an injection mold for a magnetic air cushion box, which can achieve high-precision positioning of the magnetic block and avoid the influence of loosening or falling off on the function of the air cushion box.

[0005] To achieve the above object, the specific solutions of the present invention are as follows:

[0006] 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;

[0007] The lower mold plate is provided with an inclined boss on the outer side of the lower mold core;

[0008] The upper mold core is provided with a pushing channel on the outside 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 slidingly 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.

[0009] Optionally, the material-blocking slider is provided with a driving arm and a material-blocking boss; the driving arm cooperates with the inclined surface of the driving component; and the material-blocking boss is used to close and open the discharge port.

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

[0011] Optionally, the driving assembly includes a driving slider and a driving rod movably mounted on the upper template, the driving slider being 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;

[0012] The upper end of the driving rod is elastically floating 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.

[0013] Optionally, 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.

[0014] Optionally, a tension spring is connected between the 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.

[0015] Optionally, the upper template 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 passes through the upper mold core upward.

[0016] Optionally, the upper template is provided with two groups of drive components at intervals; the two groups of drive components are distributed on both sides of the first pushing slider; the blocking slider is provided with two drive arms arranged side by side at intervals; the two drive arms respectively correspond one to one with the inclined surfaces of the two groups of drive components.

[0017] Optionally, a through hole is provided on the bottom surface of the upper template just above the inclined boss, for the inclined boss to be inserted into the upper template, so as to drive the first pushing slider to slide.

[0018] Optionally, there are two inclined bosses; and there are two through holes.

[0019] The beneficial effects of the present invention are as follows: the present invention achieves high-precision positioning of the magnetic block by directly and accurately embedding the magnetic block into the plastic part during the injection molding process without manual intervention, effectively reducing the manual assembly process and reducing production costs. It can also improve the installation accuracy and firmness of the magnetic block, avoid the impact of loosening or falling off on the function of the air cushion box, thereby improving product quality and consistency, further facilitating automated production, meeting large-scale manufacturing needs, and providing a more efficient and stable solution for the production of magnetic air cushion boxes. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 2 It is a cross-sectional schematic diagram of the present invention during mold closing;

[0022] Figure 3 yes Figure 2 A partial enlarged schematic diagram of point A in the middle;

[0023] Figure 4 It is a partial cross-sectional schematic diagram of the present invention when the material blocking boss opens the material discharge port;

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

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

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

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

[0028] Figure 9 yes Figure 8 A partial enlarged schematic diagram of point B in the middle;

[0029] Figure 10 2 is a cross-sectional schematic diagram of the upper mold of the present invention from a first viewing angle;

[0030] Figure 11 is a cross-sectional schematic diagram of the upper mold of the present invention from a second viewing angle;

[0031] Figure 12 Figure 11 A partial enlarged schematic diagram of point C in the middle;

[0032] Figure 13 2 is a cross-sectional schematic diagram of the upper mold of the present invention from a third viewing angle;

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

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

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

[0036] Explanation 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, discharge port; 23, first pusher slide; 231, tension spring; 24, second pusher slide; 241, fourth spring; 25, stopper slide; 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 platform; 292. Pressing arm; 293. Fifth spring. DETAILED DESCRIPTION

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

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

[0039] The lower mold plate 11 is provided with a guide rod 111, and the upper mold plate 21 is provided with a guide hole 212. The guide rod 111 is movable through the guide hole 212 to provide guidance and limit when the upper mold 2 and the lower mold 1 are closed, making the upper mold 2 and the lower mold 1 closed more stably. The upper mold core 22 is also provided with a spray device 28 for injecting injection material.

[0040] The lower template 11 is provided with an inclined boss 112 on the outer side of 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 on the outer side of the upper mold cavity; the upper mold core 22 is also provided with a discharge port 221 that connects 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 the position corresponding to the pushing channel; the first pushing slider 23 is located directly above the inclined boss 112; the pushing channel is slidingly provided with a second pushing slider 24; the second pushing slider 24 is elastically connected to the first pushing slider 23; the upper mold core 22 is also elastically floatingly provided with a blocking slider 25; the upper template 21 is provided with a driving assembly; the driving assembly cooperates with the inclined surface of the blocking slider 25 to drive the blocking slider 25 to close and open the discharge port 221; preferably, a second inclined surface is provided on the driving assembly, and a third inclined surface is provided on the blocking slider 25.

[0041] Specifically, in the injection mold for the magnetic air cushion box of this embodiment, at the initial stage, the driving component cooperates with the second inclined surface and the third inclined surface to make the blocking slider 25 close the discharge port 221, as shown in FIG. Figure 3 As shown; in actual use, the magnetic block is placed in the pushing channel. At this time, due to the obstruction of the blocking slider 25, the magnetic block cannot enter the discharge port 221 under the action of the first pushing slider 23 and the second pushing slider 24; then the upper mold 2 and the lower mold 1 are closed, so that the upper mold cavity and the lower mold cavity form a first mold cavity, and the inclined boss 112 squeezes the first pushing slider 23 to slide relative to the second pushing slider 24 through the first inclined surface. After closing the mold, the ejection device 28 injects a first layer of injection molding material into the first mold cavity, and forms a first injection molding layer after cooling, as shown Figure 4 As shown, it serves as the preliminary structure of the air cushion box, thereby 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 moves the blocking slider 25 up through the cooperation of the second inclined surface and the third inclined surface, thereby opening the discharge port 221. Figure 4 As shown, at this time, the magnetic block in the pushing channel enters the discharge port 221 under the push of the second pushing slider 24, and falls into the top surface of the first injection molding layer through the discharge port 221. Then the driving component causes the blocking slider 25 to move downward to close the discharge port 221. At the same time, the blocking slider 25 gently presses the magnetic block, so that the magnetic block is stably pressed against the top surface of the first injection molding layer to ensure that the magnetic block does not move during the injection molding process. At the same time, the blocking slider 25 moves up and down to ensure that the magnetic block is reliably supported on the first injection molding layer after passing through the discharge port 221, avoiding the magnetic block from getting stuck, and the structural reliability is higher; at this time, the ejection device 28 injects a second layer of injection molding material into the second mold cavity, and the second layer of injection molding material covers the magnetic block, so that the magnetic block is firmly fixed in the predetermined position, as shown in FIG. Figure 5 As shown, the position accuracy of the magnetic block is higher, and the second injection layer is finally formed, which effectively enhances the stability of the magnetic block, thereby 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 assembly makes the blocking slider 25 keep closing the discharge port 221, the first pushing slider 23 and the second pushing slider 24 are reset, and the second injection layer and the upper mold cavity form a third mold cavity. The ejection device 28 injects the third layer of injection material into the third mold cavity to form a third injection layer, which completely covers the magnetic block and completes the third injection molding. Figure 6 As shown, it becomes a magnetic air cushion box product, which completely prevents the magnetic block from loosening or falling off during use, thereby improving the durability and service life of the product.

[0044] It should be noted that during the second injection molding, the upper mold 2 moves up by a distance equal to the height of the second injection molding layer. During the third injection molding, the upper mold 2 moves up by a distance equal to the height of the third injection molding layer.

[0045] This embodiment achieves high-precision positioning of the magnetic block by directly and precisely embedding the magnetic block into the plastic part during the injection molding process without manual intervention, effectively reducing manual assembly steps and lowering production costs. It can also improve the installation accuracy and firmness of the magnetic block, thereby improving product quality and consistency, further facilitating automated production, meeting large-scale manufacturing needs, and providing a more efficient and stable solution for the production of magnetic air cushion boxes.

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

[0047] like Figure 12 、 Figures 14 to 16As shown, the injection mold for the magnetic air cushion box of this embodiment, in some embodiments, the driving assembly includes a driving slider 261 and a driving rod 262 movably provided on the upper template 21, and 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 the rigidity of the first spring 253, and the driving slider 261 is matched with the oblique surface of the material-blocking slider 25; the upper end of the driving rod 262 is elastically floated and provided with a floating pin 265; 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 to pass through the upper template 21. As shown Figure 15 As shown, the injection mold for the magnetic air cushion box of this embodiment, in some embodiments, 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 inclined section; 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 part 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, at the beginning, the driving rod 262 extends out of the upper template 21 under the action of the third spring 266, and the floating pin 265 is located at the lower end of the vertical section 2631. The second spring 264 applies elastic force to the driving slider 261, so that the driving slider 261 applies pressure to 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 discharge port 221; when the mold is closed, the driving rod 262 contacts the lower template 11 and is squeezed by the lower template 11 and moves upward, and 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 shown in FIG. Figure 2 As shown; when the first injection molding is completed, the upper mold 2 moves upward, and the floating pin 265 moves along the first inclined section 2632, so that the driving slider 261 moves away from the blocking slider 25, the second spring 264 is compressed, and the first spring 253 pushes the blocking slider 25 to move upward until the blocking boss 252 opens the discharge port 221, and the magnetic block enters the discharge port 221, as shown Figure 3 and Figure 4As shown, at the same time, 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. The third spring 266 pushes the driving rod 262 to extend downward. At this time, the second spring 264 pushes the driving slider 261 to move toward the material blocking slider 25. Until the upper mold 2 moves up to its position, the floating pin 265 returns to the vertical section 2631 from the second inclined section 2633 again. At this time, the driving slider 261 causes the material blocking boss 252 of the material blocking slider 25 to be inserted into the discharge port 221 again, thereby pressing the magnetic suction block. Figure 5 As shown, in order to maintain the stability of the position of the magnetic block, the second injection molding is then performed; 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 downward until the floating pin 265 returns to the lower end point position of the vertical section 2631, and then the third injection molding layer is performed.

[0049] Through the above arrangement, the blocking boss 252 can automatically open the discharge port 221, and after the magnetic block enters the discharge port 221, it can automatically close the discharge port 221 and press and fix the magnetic block, thereby ensuring the stability of the position of the magnetic block during the injection molding process.

[0050] like Figure 15 and Figure 16 As shown, in this embodiment, the driving slider 261 includes two slider bodies arranged opposite to each other, and an avoidance groove is provided on the inner wall of each slider body, and a driving groove is provided in each avoidance groove. The driving rod 262 is movably inserted between the two slider bodies, and floating pins 265 are elastically floatingly provided on both sides of the driving rod 262, and the floating pins 265 are movably embedded in the corresponding driving grooves; it is arranged in this way so that the driving rod 262 can reliably enable the driving slider 261 to slide by overcoming the elastic force of the second spring 264.

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

[0052] When the first pushing slide 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 slide 23, so that the first pushing slide 23 overcomes the tension of the tension spring 231 and slides toward the discharge port 221. The first pushing slide 23 pushes the second pushing slide 24 to move in the pushing channel through the fourth spring 241, and the second pushing slide 24 pushes the magnetic block to move. Since the blocking boss 252 closes the discharge port 221, the magnetic block is blocked, causing the fourth spring 241 to be compressed until the upper mold 2 and the lower mold 1 are molded together, and the inclined boss 112 restricts the first pushing slide 23, so that the tension spring 231 remains stretched; when the blocking boss 252 opens the discharge port 221, since the first pushing slide 23 is restricted, the fourth spring 241 pushes the second pushing slide 24 to slide, thereby pushing the magnetic block into the discharge port 221. Figure 4 As shown, the automatic unloading operation of the magnetic block is realized;

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

[0054] like Figures 2 to 6 、 Figure 10 As shown, in some embodiments of the injection mold for a magnetic air cushion box of this embodiment, the upper mold plate 21 and the upper mold core 22 are both provided with a feed channel 27, which is vertically connected to the push channel; the upper end of the feed channel 27 extends upward through the upper mold core 22. Specifically, during use, the magnetic blocks are stacked in the feed channel 27. After the second pusher slide 24 is reset, the next magnetic block enters the push channel from the feed channel 27, thereby performing the injection molding of the next magnetic air cushion box, thereby achieving continuous production and improving production efficiency.

[0055] like Figure 14 As shown, in the injection mold for the magnetic air cushion box of this embodiment, in some embodiments, the upper template 21 is provided with two sets of drive components at intervals; the two sets of drive components are distributed on both sides of the first pusher slider 23; Figure 14 As shown, the material-blocking slider 25 is equipped with two spaced-apart, side-by-side drive arms 251; these two drive arms 251 correspond to and engage the inclined surfaces of the two drive assembly groups. Specifically, the material-blocking slider 25 has a roughly U-shaped structure. By providing two sets of drive assemblies and cooperating with the two drive arms 251, the material-blocking slider 25 can be reliably driven up and down to ensure the unloading and pressing action of the magnetic block, further improving the reliability of the overall structure.

[0056] like Figure 8 and Figure 9 As shown, in the injection mold for the magnetic air cushion box of this embodiment, in some embodiments, the bottom surface of the upper template 21 is provided with a through hole 211 for the inclined boss 112 to be inserted into the upper template 21, so as to drive the first pusher slider 23 to slide. Specifically, when the mold is closed, the inclined boss 112 is inserted into the through hole 211, thereby being squeezed by the first inclined surface, so that the first pusher slider 23 overcomes the tension of the tension spring 231 and slides until the first pusher slider 23 is out of contact with the first inclined surface, and 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 pusher slider 23, thereby restricting the first pusher slider 23 and keeping the tension spring 231 in a stretched state.

[0057] like Figure 1 and Figure 7 As shown, in the injection mold for the magnetic air cushion box of this embodiment, in some embodiments, the number of the inclined bosses 112 is two and the number of the through holes 211 is two. This arrangement makes the movement of the first pusher slider 23 more stable.

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

[0059] Specifically, the number of blanking components is set to be multiple, and the multiple blanking components are distributed at intervals so that the formed magnetic air cushion box product can be reliably ejected from the lower mold cavity, such as the number is set to four.

[0060] For example, Figure 2 As shown, the blanking assembly includes a cylinder 131 and an ejector rod 132; the cylinder 131 is fixed on the lower mold plate 11, the lower end of the ejector rod 132 is connected to the cylinder 131, and the upper end of the ejector rod 132 passes through 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 the product needs to be blanked, the cylinder 131 drives the ejector rod 132 to extend into the lower mold cavity, thereby ejecting the magnetic air cushion box product out of the lower mold cavity.

[0061] like Figure 8 and Figure 13As shown, in some embodiments of the injection mold for a magnetic air cushion box of this embodiment, the upper mold core 22 is elastically and floatingly connected to an ejector plate 29. After the mold is closed, 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 closed to form the first mold cavity. When the upper mold plate 21 moves upward, the ejector plate 29 applies pressure to the first molded layer after molding, so that the first molded layer remains in the lower mold cavity, thereby preventing the first molded layer from moving upward synchronously with the upper mold 2.

[0062] Specifically, if Figure 13 As shown, a center column is set at the center of the top surface of the ejection plate 29, and the center column slides into the lower mold core 12. The outer peripheral wall of the center column is connected to a plurality of radially extending pressure arms 292. The number of pressure arms 292 can be set to four, and the four pressure arms 292 are distributed in a cross shape. The end of each pressure arm 292 is provided with a pressure platform 291 protruding from the bottom surface of the upper mold core 22, and a fifth spring 293 is connected between each pressure arm 292 and the inner wall of the upper mold core 22; in this way, the fifth spring 293 is used to make the pressure platform 291 protrude from the bottom surface of the upper mold core 22, so that when the mold is closed, the pressure platform 291 contacts the top surface of the lower mold core 12, compressing the fifth spring 293, so that the elastic force of the fifth spring 293 is used to apply pressure to the first injection layer after molding.

[0063] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics 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 comprising a lower mold plate and a lower mold core having a lower mold cavity; the upper mold comprising an upper mold plate and an upper mold core having an upper mold cavity; characterized in that: The lower mold plate is provided with an inclined boss on the outer side of the lower mold core; The upper die core is provided with a pushing channel on the outer side of the upper die cavity; the upper die core is also provided with a discharge port connecting the pushing channel with the upper die 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; a second pushing slider is slidably provided with the pushing channel; the second pushing slider is elastically connected to the first pushing slider; the upper die core is also elastically provided with a stopper slider; the upper template is provided with a driving assembly; the driving assembly cooperates with the inclined surface of the stopper slider to drive the stopper slider to close and open the discharge port; The driving assembly includes a driving slider and a driving rod movably arranged 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 cooperates with the inclined surface of the material blocking slider; The upper end of the driving rod is elastically floating 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; 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.

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 slide block and the upper die core.

4. 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.

5. The injection mold for a magnetic air cushion box according to claim 1, characterized in that: The upper template 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 passes through the upper mold core upward.

6. 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 slider; the blocking slider 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 manner.

7. 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 pushing sliding block to slide.

8. The injection mold for a magnetic air cushion box according to claim 7, characterized in that: There are two inclined bosses; and there are two through holes.

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