Demoulding ejection device for grating product

Abstract

The utility model relates to the technical field of injection molds, in particular to a demolding ejection device for a grating product, which comprises a driving mechanism, a demolding mechanism and a demolding mechanism, the first ejection assembly comprises a first ejection plate connected with the end part of the driving rod and a first ejector pin arranged on the first ejection plate; the second ejection assembly comprises a second ejection plate and a second ejector pin, the second ejection plate and the first ejection plate are arranged in a stacked mode, the second ejector pin is arranged on the second ejection plate, the second ejection plate movably sleeves the driving rod, and the second ejector pin penetrates through the first ejection plate; and the fixing mechanism is located on the outer sides of the first top plate and the second top plate, is opposite to the outer side faces of the first top plate and the second top plate, and is used for switching the first top plate and the second top plate between a mutual locking state and a mutual unlocking state. According to the demolding ejection device of the grating product, ejection is conducted twice, the ejection force is decomposed in a secondary ejection mode, the adhesion phenomenon of the grating position of the product is avoided, and the forming efficiency and the forming effect of the product are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection mold, in particular to a demolding and ejecting device for a grating product. BACKGROUND

[0002] The injection mold is a mold for plastic injection molding, which usually includes a movable mold and a fixed mold for forming an injection cavity. In order to realize the ejection of the product after injection molding, a push-pull mechanism needs to be provided on the injection mold. The push-pull mechanism includes a push-pull plate, a reset rod and a ejector pin vertically arranged on the push-pull plate. After injection molding, the injection part is left on the cavity surface of the movable mold, and the injection part is ejected upward by the upward ejection action of the ejector pin on the push-pull mechanism, so as to be separated from the cavity surface of the movable mold.

[0003] For injection parts with relatively simple structure, a one-time ejection structure can be used to smoothly eject the injection part from the mold. However, for injection parts with complex structure, such as an audio shell with a grating, the following problems will be caused by using a one-time ejection structure: the audio shell with a grating inserts many mold ejecting blocks in a small area to form a grating, and the mold ejecting blocks are easy to stick together when they are separated from the product shell, which will cause demolding difficulty and affect the forming quality of the grating. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, some embodiments of the present application provide a demolding and ejecting device for a grating product, which ejects twice during product demolding, the first time to eject the product from the mold, and the second time to separate the grating from the ejecting device to realize the demolding of the grating position, which is simple and has good grating forming quality.

[0005] The first aspect of some embodiments of the present application provides a demolding and ejecting device for a grating product, which includes:

[0006] A driving mechanism including a telescopic driving rod;

[0007] A first ejecting assembly including a first top plate connected to the end of the driving rod and a first ejector pin provided on the first top plate;

[0008] A second ejecting assembly including a second top plate stacked with the first top plate and a second ejector pin provided on the second top plate, the second top plate being movably sleeved on the driving rod, and the second ejector pin penetrating through the first top plate;

[0009] A fixing mechanism located outside the first top plate and the second top plate and oppositely arranged with the outer surfaces of the first top plate and the second top plate, the fixing mechanism being used for switching the first top plate and the second top plate between the locked state and the unlocked state.

[0010] The demolding ejection device of the grid product has a first ejection assembly and a second ejection assembly, a fixing mechanism can lock and unlock the first top plate and the second top plate, when the first top plate and the second top plate are locked, the first ejection assembly and the second ejection assembly move along the axial direction of the driving rod under the action of the driving rod, the first ejector pin and the second ejector pin act simultaneously to eject the product in the mold from the mold cavity, after the product is ejected, the first top plate and the second top plate are unlocked, the driving rod drives the first top plate to continue to move, the second top plate remains stationary, the product is separated from the second ejector pin, and the demolding of the grid position is realized. The demolding ejection device of the grid product in the embodiment of the application is ejected twice, the ejection force is decomposed through the mode of twice ejection, the sticking phenomenon of the grid position of the product is avoided, and the forming efficiency and forming effect of the product are improved.

[0011] In some embodiments, the second top plate is recessed inward on the outer side corresponding to the fixing mechanism to form a first mounting groove, a clamping block is arranged in the first mounting groove, the clamping block at least partially protrudes from the slot opening of the first mounting groove, and the outer end face of the clamping block can retract into the first mounting groove when pressed.

[0012] The fixing mechanism includes a locking piece, the locking piece is fixedly connected with the first top plate, and a clamping groove is arranged on the locking piece and corresponds to the clamping block to clamp the part of the clamping block protruding from the first mounting groove.

[0013] The cooperation of the clamping block and the clamping groove can realize the mutual locking of the locking piece and the second top plate, the locking piece is fixedly connected with the first top plate, and thus the mutual locking of the first top plate and the second top plate is realized. The clamping block can retract into the first mounting groove when pressed, that is, the clamping block and the clamping groove can be separated when the clamping block is pressed, and thus the mutual unlocking of the first top plate and the second top plate is realized. Through the cooperation of the clamping block and the clamping groove, the first top plate and the second top plate can be switched between the mutual unlocking state and the mutual locking state, and the twice ejection of the demolding ejection device can be realized.

[0014] In some embodiments, the clamping block and the first mounting groove are connected through a reset piece, the reset piece makes the clamping block at least partially protrude from the slot opening of the first mounting groove in the state of not being pressed by external force, and is compressed and moves along with the clamping block to the direction close to the groove bottom of the first mounting groove when pressed.

[0015] The arrangement of the reset piece makes the clamping block protrude from the first mounting groove to cooperate with the clamping groove in the state of not being pressed by external force, and makes the clamping block retract into the first mounting groove to separate from the clamping groove in the state of being pressed by external force, and thus the first top plate and the second top plate can be switched between the mutual unlocking state and the mutual locking state.

[0016] In some embodiments, the size of the clamping groove is greater than or equal to the size of the clamping block along the axial direction of the driving rod, and the lower sidewall of the clamping groove abuts against the bottom surface of the clamping block when the clamping groove is in clamping cooperation with the clamping block.

[0017] After the clamping block enters into the clamping groove, the lower sidewall of the clamping groove abuts against the bottom surface of the clamping block, so that when the first top plate is driven upward by the driving rod, the first top plate can exert an upward force on the second top plate through the locking member, thereby ensuring that the second top plate moves upward together with the first top plate.

[0018] In some embodiments, the fixing mechanism further comprises an unlocking member corresponding to the clamping block, which is configured to press the clamping block so as to retract the clamping block into the first mounting groove.

[0019] The unlocking member is configured to enable the clamping block to automatically disengage from the clamping groove when the clamping block moves to a position corresponding to the unlocking member, thereby achieving mutual unlocking of the first top plate and the second top plate.

[0020] In some embodiments, the unlocking member is provided with a sliding groove arranged in a direction parallel to the driving rod, and the locking member is slidably arranged in the sliding groove.

[0021] This ensures that the locking member can move upward with the first top plate and the second top plate without being blocked by the unlocking member. Meanwhile, the sliding groove serves as a guide and a position limiter for the movement of the locking member, thereby preventing the locking member from deviating from its position when moving with the first top plate.

[0022] In some embodiments, the unlocking member comprises a fixed plate and two limiting plates arranged on the fixed plate, the two limiting plates are arranged in parallel and located on the side of the fixed plate facing the first top plate and the second top plate, and the two limiting plates and the fixed plate jointly define the sliding groove; the limiting plate comprises an avoiding section and a pressing section arranged in sequence along a direction parallel to the driving rod, the end face of the limiting plate away from the fixed plate protrudes from or is flush with the slot opening of the clamping groove at the pressing section, and the end face of the limiting plate away from the fixed plate forms an avoiding groove at the avoiding section.

[0023] In the non-demoulding state, the locking part is located in the sliding groove of the avoiding section, and the avoiding groove does not interfere with the clamping block 43, and the clamping block on the second top plate can be kept in the state of extending out of the first installation groove under the action of the reset member, the clamping block extends out of the first installation groove and enters the clamping groove on the locking part to form a clamping state with the clamping groove, so that the locking part realizes the mutual locking of the first top plate 21 and the second top plate. When demoulding, the driving rod continues to elongate, driving the first top plate and the second top plate to continue to move upwards, until the clamping block is opposite to the extrusion section, the extrusion section applies an inward pressure to the clamping block, so that the clamping block is separated from the clamping groove, and then the first top plate and the second top plate are in a mutually unlocked state. The automatic locking and unlocking of the clamping block and the clamping groove are realized through the setting of the limiting plate.

[0024] In some embodiments, the distance between the two limiting plates is less than the width of the clamping block.

[0025] In this way, when the clamping block moves to the position corresponding to the extrusion section, the limiting plate will interfere with the clamping block, providing an inward pressure to the clamping block, so that the clamping block retracts into the first installation groove, and then the clamping block is separated from the clamping groove, and the first top plate and the second top plate are unlocked.

[0026] In some embodiments, the upper end of the second ejector pin is provided with a grid top block, and the upper surface of the grid top block is provided with a plurality of spaced formed protrusions to form a grid on the product.

[0027] During the injection molding process, the grid top block acts as a grid mold to form a grid on the acoustic shell, and provides an upward ejection force to the acoustic shell during demoulding and ejection. The number of ejector pins is reduced, and the size of the mold can be reduced.

[0028] In some embodiments, the number of fixing mechanisms is at least two, and at least two fixing mechanisms are spaced around the first top plate and the second top plate.

[0029] At least two fixing mechanisms are arranged around the first top plate and the second top plate, and the mutual locking of the first top plate and the second ejector pin is realized simultaneously around the first top plate and the second top plate, improving the stability of the structure. BRIEF DESCRIPTION OF DRAWINGS

[0030] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the drawings needed to be used in the embodiments or the related art description. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0032] Figure 1 A sectional view of the demolding ejection device according to some embodiments of the present application;

[0033] Figure 2 A structural schematic view of the demolding ejection device according to some embodiments of the present application;

[0034] Figure 3 An axonometric view of the demolding ejection device according to some embodiments of the present application;

[0035] Figure 4 A Figure 3 A local enlarged view of point A in FIG. 1;

[0036] Figure 5 A front view of the demolding ejection device according to some embodiments of the present application;

[0037] Figure 6 A Figure 5 A local enlarged view of point B in FIG. 1;

[0038] Figure 7 A right view of the demolding ejection device according to some embodiments of the present application;

[0039] Figure 8 A structural schematic view of the unlocking member according to some embodiments of the present application;

[0040] Figure 9 A structural schematic view of the locking member according to some embodiments of the present application;

[0041] Figure 10 A structural schematic view of the second ejecting pin according to some embodiments of the present application.

[0042] 1, driving mechanism; 11, driving rod; 12, base;

[0043] 2, first ejection assembly; 21, first ejection plate; 22, first ejecting pin;

[0044] 3, second ejection assembly; 31, second ejection plate; 32, second ejecting pin; 321, grid top block; 322, shaped protrusion

[0045] 4, fixing mechanism; 41, locking piece; 411, clamping groove; 4111, lower side wall; 412, third guide slope; 413, fixed part; 42, unlocking piece; 420, sliding groove; 421, fixed plate; 422, limiting plate; 4221, avoiding section; 4222, extrusion section; 4223, first guide slope; 43, clamping block; 431, second guide slope; 433, gap. DETAILED DESCRIPTION

[0046] In order to enable the above-mentioned purposes, features and advantages of the present application to be more clearly understood, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0047] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can also be implemented in other manners different from those described herein; obviously, the embodiments in the description are only some embodiments of the present application, not all embodiments.

[0048] As shown in Figures 1 to 10 The present application provides a demolding ejection device for a grating product, which is used for demolding and ejecting an acoustic shell when the acoustic shell with a grating is formed.

[0049] Specifically, in some embodiments, the demolding ejection device comprises:

[0050] A driving mechanism 1, the driving mechanism 1 comprises a telescopic driving rod 11, the driving rod 11 is driven by a motor and can realize elongation and shortening along the axial direction, and the driving rod 11 is arranged along the vertical direction.

[0051] The demolding ejection device further comprises a first ejection assembly 2, the first ejection assembly 2 comprises a first top plate 21 connected with the end of the driving rod 11 and a first ejector pin 22 arranged on the first top plate 21; specifically, in some embodiments, the first top plate 21 is connected with the upper end of the driving rod 11, and the first top plate 21 is horizontally arranged, the first ejector pin 22 is arranged on the upper side of the first top plate 21, the first top plate 21 moves together with the driving rod 11 when the driving rod 11 moves, and the first ejector pin 22 is used for upwardly ejecting the acoustic shell when the acoustic shell is demolded.

[0052] The demolding ejection device further comprises a second ejection assembly 3, the second ejection assembly 3 comprises a first top plate 21 stacked with the first top plate 21 and a second ejector pin 32 arranged on a second top plate 31, the second top plate 31 is movably sleeved on the driving rod 11, and the second ejector pin 32 penetrates through the first top plate 21. Specifically, in some embodiments, the second top plate 31 is located below the first top plate 21, and the second top plate 31 is provided with a first through hole penetrating through the second top plate 31 along the thickness direction of the second top plate 31, the driving rod 11 is fixedly connected with the first top plate 21 after penetrating through the first through hole from bottom to top, and the first through hole is in a sliding connection relationship with the driving rod 11, that is, the driving rod 11 can slide in the first through hole. The first top plate 21 is provided with a second through hole penetrating through the first top plate 21 along the thickness direction of the first top plate 21, the second ejector pin 32 is arranged on the upper side of the second top plate 31, and the second ejector pin 32 penetrates through the second through hole from bottom to top and supports the acoustic shell. When the product is demolded, the second ejector pin 32 supports the acoustic shell at the same time as the first ejector pin 22, wherein the second ejector pin 32 is arranged in correspondence with the grid position of the acoustic shell.

[0053] The demolding ejection device further comprises a fixing mechanism 4 located outside the first top plate 21 and the second top plate 31 and arranged opposite to the outer side of the first top plate 21 and the second top plate 31, the fixing mechanism 4 is used for switching the first top plate 21 and the second ejector pin 32 between a mutual locking state and a mutual unlocking state. When the first top plate 21 and the second top plate 31 are in the mutual locking state, the driving rod 11 moves upward, which simultaneously drives the first top plate 21 and the second top plate 31 to move upward at the same time. When the first top plate 21 and the second top plate 31 are in the mutual unlocking state, the locking relationship between the first top plate 21 and the second top plate 31 is released, and only the first top plate 21 moves upward when the driving rod 11 moves upward, and the second top plate 31 remains stationary. Through the switching of the first top plate 21 and the second top plate 31 between the mutual locking state and the mutual unlocking state, the secondary ejection of the demolding ejection device is realized.

[0054] In use, the first top plate 21 and the second top plate 31 are located at the lowermost end of the stroke (that is, the initial position), and the first top plate 21 and the second top plate 31 are in the mutual locking state. The first ejection assembly 2 and the second ejection assembly 3 move simultaneously along the axial direction of the driving rod 11 under the action of the driving rod 11, the first ejector pin 22 and the second ejector pin 32 act simultaneously, and the product in the mold is ejected from the mold cavity. After the product is ejected, the first top plate 21 and the second top plate 31 are switched to the mutual unlocking state, the driving rod 11 drives the first top plate 21 to continue to move alone, and the second top plate 31 remains stationary, thereby separating the product from the second ejector pin 32 and realizing the demolding of the grid position. The demolding ejection device for the grid product of the embodiment of the application is ejected twice, the ejection force is decomposed through the secondary ejection, the sticking phenomenon of the product at the grid position is avoided, and the forming efficiency and forming effect of the product are improved.

[0055] It can be understood that the fixing mechanism 4 can adopt a lock buckle, which fixes the first top plate 21 and the second top plate 31 when closed, and unlocks the first top plate 21 and the second top plate 31 when opened, and the first top plate 21 can be independently moved upward under the driving of the driving rod 11.

[0056] The fixing mechanism 4 can also be a structure capable of automatic locking and automatic unlocking. For example, in some embodiments of the present application, the second top plate 31 is recessed inward on the outer side surface corresponding to the fixing mechanism 4 to form a first mounting groove, and a clamping block 43 is arranged in the first mounting groove. The clamping block 43 at least partially protrudes from the slot of the first mounting groove, and the outer end surface of the clamping block 43 can retract into the first mounting groove when subjected to pressure.

[0057] The fixing mechanism 4 includes a locking piece 41, the upper end of the locking piece 41 is provided with a fixing part 413, the fixing part 413 is fixedly connected with the first top plate 21, and the locking piece 41 is provided with a clamping groove 411 on the surface (i.e. inner side surface) facing the first top plate 21 and the second top plate 31, the clamping groove 411 is correspondingly arranged with the clamping block 43, and is used for clamping with the part of the clamping block 43 protruding from the first mounting groove.

[0058] Specifically, when the clamping block 43 is not subjected to external pressure, part of the clamping block 43 protrudes from the first mounting groove to the outer side surface of the second top plate 31, and the part of the clamping block 43 protruding from the first mounting groove is just inserted into the clamping groove 411, and the clamping block 43 is clamped and matched with the clamping groove 411, thereby realizing the mutual locking of the first top plate 21 and the second top plate 31.

[0059] It can be understood that the upper end of the locking piece 41 is fixed on the outer side surface of the first top plate 21, and the clamping groove 411 is arranged on the surface facing the second top plate 31, when the clamping block 43 is not subjected to external pressure, the clamping block 43 is inserted into the clamping groove 411 and clamped and matched with the clamping groove 411, the first top plate 21 and the second top plate 31 are mutually locked by the locking piece 41 and the clamping block 43, and when the driving rod 11 moves upward, the first ejecting assembly 2 and the second ejecting assembly 3 are simultaneously moved upward.

[0060] It can also be understood that since the clamping block 43 can retract into the first mounting groove when subjected to pressure, the clamping and matching relationship between the clamping block 43 and the clamping groove 411 disappears, the locking piece 41 loses the locking effect on the second top plate 31, and when the driving rod 11 moves upward, only the first ejecting assembly 2 moves upward with the driving rod 11, and the second ejecting assembly 3 remains in place.

[0061] In some embodiments of the present application, the clamping block 43 is connected to the first mounting groove through a reset member. The reset member allows the clamping block to at least partially extend out of the slot of the first mounting groove under the condition of no external pressure, and to move towards the bottom of the first mounting groove when under pressure. Specifically, the reset member is a structure with elasticity, for example, a spring. The reset member is provided to allow the clamping block 43 to extend out of the first mounting groove and cooperate with the clamping groove 411 when not under external pressure, and to retract into the first mounting groove and disengage from the clamping groove 411 when under external force, thereby realizing the switching between the unlocked state and the locked state of the first top plate 21 and the second top plate 31.

[0062] In order to ensure that the locking member 41 can move with the first top plate 21 without being affected by the second top plate 31 after the clamping groove 411 and the clamping block 43 disengage, a gap 433 is formed between the lower end of the locking member 41 and the outer side of the second top plate 31.

[0063] In some embodiments of the present application, the size of the clamping groove 411 is greater than or equal to the size of the clamping block 43 along the axial direction of the drive rod 11 (i.e., the vertical direction), and one side wall of the clamping groove 411 abuts against the bottom surface of the clamping block 43.

[0064] Specifically, as shown in Figure 1 the size of the first mounting groove is slightly larger than the size of the clamping block 43 along the axial direction of the drive rod 11 to ensure that the clamping block 43 can move in the left-right direction in the first mounting groove but cannot move in the vertical direction (to avoid the shaking of the clamping block 43), and the size of the clamping groove 411 in the vertical direction is greater than the size of the clamping block 43 in the vertical direction, so that the clamping block 43 can easily enter the clamping groove 411 when not under external pressure. After the clamping block 43 enters the clamping groove 411, the lower side wall 4111 of the clamping groove 411 abuts against the bottom surface of the clamping block 43, thereby allowing the first top plate 21 to exert an upward force on the second top plate 31 through the locking member 41 when the first top plate 21 is driven upward by the drive rod 11, and ensuring that the second top plate 31 moves upward together with the first top plate 21.

[0065] In some embodiments of the present application, as shown in Figure 8 the unlocking member 42 is provided with a sliding groove 420 arranged in a direction parallel to the drive rod 11, and the locking member 41 is slidably arranged in the sliding groove 420. Specifically, the unlocking member 42 is fixedly arranged, and the locking member 41 moves together with the first top plate 21 when the first top plate 21 moves upward. The sliding groove 420 is arranged on the locking member 41 to reduce the friction between the locking member 41 and the unlocking member 42, and at the same time, the sliding groove 420 plays a guiding and limiting role for the movement of the locking member 41 to avoid the position deviation of the locking member 41 when moving together with the first top plate 21.

[0066] Exemplarily, in some embodiments of the present application, the unlocking member 42 comprises a fixed plate 421 and two limiting plates 422 arranged on the fixed plate 421, the two limiting plates 422 are arranged in parallel and located at the inner side of the fixed plate 421, that is, the side of the fixed plate 421 facing the first top plate 21 and the second top plate 31, the fixed plate 421 is arranged along the direction parallel to the driving rod 11, and the two limiting plates 422 and the fixed plate 421 together define a sliding groove 420, wherein the two limiting plates 422 are respectively two groove walls of the sliding groove 420, and the fixed plate 421 forms the groove bottom of the sliding groove 420. In use, the locking member 41 is slidably inserted between the two limiting plates 422, the limiting plate 422 comprises an avoiding section 4221 and a pressing section 4222 arranged in sequence along the direction parallel to the driving rod 11 (that is, the vertical direction), and the end face of the limiting plate 422 away from the fixed plate 421 (that is, the inner end face of the limiting plate 422) protrudes from or is flush with the slot opening of the clamping groove 411 at the pressing section 4222, and the end face of the limiting plate 422 away from the fixed plate 421 (the inner end face of the limiting plate 422) forms an avoiding groove at the avoiding section 4221.

[0067] Specifically, the avoiding section 4221 and the pressing section 4222 are arranged in sequence from top to bottom, that is, the avoiding section 4221 is located below the pressing section 4222, in the unmolding state, the locking member 41 is located in the sliding groove 420 of the avoiding section 4221, and the avoiding groove and the clamping block 43 do not interfere with each other, the clamping block 43 on the second top plate 31 can be kept in the state of extending out of the first mounting groove under the elastic force of the restoring member, the clamping block 43 extends out of the first mounting groove into the clamping groove 411 on the locking member 41 to form a clamping state with the clamping groove 411, so as to realize the mutual locking of the first top plate 21 and the second top plate 31.

[0068] In the demolding process, the driving rod 11 is elongated to drive the first top plate 21 and the second top plate 31 to move upward at the same time, in the process that the locking member 41 moves from the lower end to the upper end of the avoiding section 4221, the first ejector pin 22 and the second ejector pin 32 can just eject the acoustic shell from the mold cavity of the mold to realize the demolding of the acoustic shell. At this time, the driving rod 11 continues to be elongated to drive the first top plate 21 and the second top plate 31 to continue to move upward, until the clamping block 43 is opposite to the pressing section 4222, the pressing section 4222 applies an inward pressure to the clamping block 43 to separate the clamping block 43 from the clamping groove 411, and then the first top plate 21 and the second top plate 31 are in the state of mutual unlocking, the driving rod 11 continues to be elongated to only drive the first top plate 21 and the first ejector pin 22 to move upward, and the second top plate 31 and the second ejector pin 32 remain stationary, so that the acoustic shell is separated from the second ejector pin 32, and since the second ejector pin 32 corresponds to the lattice position on the acoustic shell, the demolding of the lattice position is completed.

[0069] In order to avoid the interference of the carding block 43 during the movement to the position corresponding to the extrusion section 4222, a first guide slope 4223 and a second guide slope 431 are arranged at the upper end of the avoiding slot and the upper end of the carding block 43 respectively, the inclination angles of the first guide slope 4223 and the second guide slope 431 are the same, and the first guide slope 4223 and the second guide slope 431 play a guiding role during the sliding of the carding block 43 out of the avoiding slot.

[0070] In order to enable the carding block 43 to be re-coupled with the carding slot 411 when the first top plate 21 and the second top plate 31 are lowered, a third guide slope 412 is arranged at the lower end surface of the locking member 41, the second guide slope 431 slides in abutment with the second guide slope 431 when the locking member 41 is lowered to the position in contact with the carding block 43, the carding block 43 is guided to re-enter the carding slot 411, and the first top plate 21 and the second top plate 31 can be simultaneously lowered to the initial position (that is, the lowest end).

[0071] In order to ensure that the avoiding section 4221 does not affect the coupling effect of the carding block 43 and the carding slot 411, the bottom of the avoiding slot is located outside the carding block 43 when the carding block 43 is coupled with the carding slot 411, that is, the bottom of the carding slot 411 does not contact the carding block 43.

[0072] When the distance between the two limiting plates 422 is large, the carding block 43 and the locking member 41 are located in the sliding groove 420, at this time, even if the carding block 43 moves to the position corresponding to the extrusion section 4222, the limiting plate 422 cannot provide an inward pressure to the carding block 43, and the unlocking cannot be realized. Therefore, in some embodiments of the present application, the distance between the two limiting plates 422 needs to be less than the width of the carding block 43 (the dimension in the direction perpendicular to the paper surface, that is, the front-rear direction), so that when the carding block 43 moves to the position corresponding to the extrusion section 4222, the limiting plate 422 will interfere with the carding block 43, providing an inward pressure to the carding block 43, so that the carding block 43 is retracted into the first mounting slot, and the carding block 43 is separated from the carding slot 411, and the first top plate 21 and the second top plate 31 are unlocked.

[0073] The inner end surface of the limiting plate 422 protrudes from or is flush with the slot opening of the carding slot 411 at the extrusion section 4222, which is also to enable the limiting plate 422 to move the carding block 43 inwardly when the carding block 43 moves to the extrusion section 4222, and separate the carding block 43 from the carding slot 411.

[0074] The traditional mold only has a top plate and a set of ejector pins, and the product is ejected at one time during demolding. If the product is a multi-hole and multi-grid structure, the contact surface between the product and the mold is larger, which is easy to stick, resulting in the appearance of the product being pulled. In order to demold the grid position, a large number of ejector pins need to be set, which increases the size of the mold core, and ultimately leads to a larger size of the mold.

[0075] In some embodiments of the present application, a grid ejector block 321 is arranged at the end of the second ejector pin 32, and a plurality of forming protrusions 322 are arranged on the upper surface of the grid ejector block 321 to form a grid on the sound enclosure. During the injection molding process, the grid ejector block 321 acts as a grid mold to form a grid on the sound enclosure, and provides an upward ejection force to the sound enclosure during demolding and ejection. The number of ejector pins is reduced, and the size of the mold can be reduced.

[0076] In some embodiments of the present application, the first ejector pin 22 and the second ejector pin 32 are arranged in a staggered manner. Figure 1 As shown, the number of fixing mechanisms 4 is at least two, and the at least two fixing mechanisms 4 are arranged at intervals around the first top plate 21 and the second top plate 31. Specifically, the at least two fixing mechanisms 4 are arranged around the first top plate 21 and the second top plate 31, and the mutual locking of the first top plate 21 and the second ejector pin 32 is realized at the same time around the first top plate 21 and the second top plate 31, which improves the stability of the structure.

[0077] For example, in some embodiments of the present application, the first top plate 21 and the second top plate 31 are rectangular, the size of the first top plate 21 and the second top plate 31 is the same, and the outer side surface of the first top plate 21 is flush with the outer side surface of the second top plate 31 after being stacked. The driving mechanism 1 includes a base 12 and a driving rod 11 arranged on the base 12, the first top plate 21 and the second ejector pin 32 are arranged on the base 12, the first top plate 21 is located above the second top plate 31, the upper end of the driving rod 11 passes through the second top plate 31 and is fixedly connected with the middle part of the first top plate 21, the first ejector pin 22 is located above the first top plate 21, and the lower end of the first ejector pin 22 is fixedly connected with the first top plate 21, the second ejector pin 32 is located above the second top plate 31, and the lower end of the second ejector pin 32 is fixedly connected with the second top plate 31, the upper end of the second ejector pin 32 passes through the first top plate 21 and supports the sound enclosure formed in the mold at the same time as the first top plate 21. The number of first ejector pins 22 is set to be multiple, which supports the sound enclosure at different positions, and the number of second ejector pins 32 is set to be one or more, which is specifically set according to the position and number of the grid on the sound enclosure.

[0078] The lower end of the unlocking piece 42 is fixedly connected with the base 12 of the driving mechanism 1, and the upper end is fixedly connected with the mold. In some embodiments of the present application, the number of the fixing mechanisms 4 is two, and the two fixing mechanisms 4 are symmetrically arranged on the left and right sides of the first ejection assembly 2 and the second ejection assembly 3. The mold, the base 12 of the driving mechanism 1 and the two fixing mechanisms 4 jointly enclose the movement space of the first ejection assembly 2 and the second ejection assembly 3.

[0079] The specific operation method of the sound casing in injection molding is as follows:

[0080] (1) The injection mold is closed (the movable mold is closed relative to the fixed mold);

[0081] (2) After the mold is closed, injection molding is performed;

[0082] (3) After injection molding, the mold is opened;

[0083] (4) After the mold is opened, the driving rod 11 is elongated to drive the first ejection assembly 2 and the second ejection assembly 3 to move upward at the same time, thereby ejecting the sound casing from the mold cavity. In this process, the clamping blocks 43 on the second top plate 31 are clamped and matched with the clamping blocks 43 on the locking piece 41, thereby realizing the mutual locking of the first top plate 21 and the second top plate 31, and the first ejection assembly 2 and the second ejection assembly 3 can move upward at the same time;

[0084] (5) The clamping blocks 43 move to the position corresponding to the extrusion section 4222 along with the second top plate 31, the extrusion section 4222 provides an inward pressure to the clamping blocks 43, so that the clamping blocks 43 retract into the first mounting groove, and then the first top plate 21 and the second top plate 31 are unlocked, the driving rod 11 continues to be elongated to drive the first top plate 21 to continue to move upward, and the second top plate 31 remains stationary, so that the second ejector pin 32 is separated from the sound casing, and then the demolding of the grid position is realized.

[0085] The embodiment of the present application provides a demolding and ejection device for a grid product. The first top plate 21 and the second top plate 31 are switched between the locked state and the unlocked state through the fixing mechanism 4. In the initial stage of demolding and ejection of the grid product, the first top plate 21 and the second top plate 31 are locked, the driving rod 11 is elongated to drive the first top plate 21 and the second top plate 31 to move upward at the same time, thereby ejecting the grid product from the mold cavity as a whole. Then, under the action of the fixing mechanism 4, the first top plate 21 and the second top plate 31 are unlocked, the driving rod 11 continues to be elongated to drive the first top plate 21 to continue to move upward, and the second top plate 31 remains stationary. The upper end of the second ejector pin 32 is provided with a forming protrusion for forming a grid, so that the grid position is lifted, and the demolding of the grid position is realized. The demolding and ejection device is ejected twice, which reduces the demolding difficulty of the grid product and improves the success rate of demolding.

[0086] It has to be noted that, in the present document, relational terms are intended only to convey a possible relationship between elements or

[0087] The above description is merely that of a specific implementation to enable a person skilled in the art to understand or implement the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A demolding ejection device for a grid product, characterized in that, The device comprises: a driving mechanism (1) comprising a telescopic driving rod (11); a first ejection assembly (2) comprising a first top plate (21) connected to an end of the driving rod (11) and a first ejector pin (22) arranged on the first top plate (21); a second ejection assembly (3) comprising a second top plate (31) arranged in a stack with the first top plate (21) and a second ejector pin (32) arranged on the second top plate (31), the second top plate (31) being movably sleeved on the driving rod (11), and the second ejector pin (32) penetrating through the first top plate (21); a fixing mechanism (4) arranged on the outer side of the first top plate (21) and the second top plate (31) and opposite to the outer side of the first top plate (21) and the second top plate (31), the fixing mechanism (4) being used for switching the first top plate (21) and the second top plate (31) between a locked state and an unlocked state.

2. The grid product demolding and ejecting device according to claim 1, wherein the second top plate (31) is recessed inward on the outer side corresponding to the fixing mechanism (4) to form a first mounting groove, a clamping block (43) is arranged in the first mounting groove, the clamping block (43) at least partially protrudes from the groove opening of the first mounting groove, and the outer end surface of the clamping block (43) can retract into the first mounting groove when pressed; the fixing mechanism (4) comprises a locking piece (41) fixedly connected with the first top plate (21), and a clamping groove (411) is arranged on the locking piece (41) and corresponds to the clamping block (43) to clamp the part of the clamping block (43) protruding from the first mounting groove.

3. The grid product demolding ejection device according to claim 2, characterized in that, The clamping block (43) and the first mounting groove are connected through a reset piece, the reset piece makes the clamping block (43) at least partially protrude from the groove opening of the first mounting groove in a state not subjected to external pressure, and is compressed and moves with the clamping block (43) towards the groove bottom of the first mounting groove when pressed.

4. The grid product demolding ejection device according to claim 2, characterized in that, In the axial direction of the driving rod (11), the size of the clamping groove (411) is greater than or equal to the size of the clamping block (43), and when the clamping groove (411) and the clamping block (43) are clamped and matched, the lower side wall (4111) of the clamping groove (411) abuts against the bottom surface of the clamping block (43).

5. The grid product demolding ejection device according to claim 2, characterized in that, The fixing mechanism (4) further comprises an unlocking piece (42) corresponding to the clamping block (43) to press the clamping block (43) to retract into the first mounting groove.

6. The grid product demolding ejection device according to claim 5, characterized in that, A sliding groove (420) is arranged on the unlocking piece (42) in a direction parallel to the driving rod (11), and the locking piece (41) is slidably arranged in the sliding groove (420).

7. The grid product demolding ejection device according to claim 6, characterized in that, The unlocking piece (42) comprises a fixed plate (421) and two limiting plates (422) arranged on the fixed plate (421), the two limiting plates (422) are arranged in parallel and are located on the side of the fixed plate (421) facing the first top plate (21) and the second top plate (31), and the two limiting plates (422) and the fixed plate (421) jointly define the sliding groove (420); the limiting plate (422) comprises an avoiding section (4221) and an extruding section (4222) arranged in sequence in the direction parallel to the driving rod (11), and the end face of the end of the limiting plate (422) away from the fixed plate (421) protrudes from or is flush with the slot opening of the clamping groove (411) at the extruding section (4222), and the end face of the end of the limiting plate (422) away from the fixed plate (421) forms an avoiding groove at the avoiding section (4221).

8. The grid product demolding ejection device according to claim 7, characterized in that, The distance between the two limiting plates (422) is less than the width of the clamping block (43).

9. The grid product demolding ejection device according to claim 1, characterized in that, The upper end of the second top pin (32) is provided with a grid top block (321), and the upper surface of the grid top block (321) is provided with a plurality of spaced formed protrusions (322) to form a grid on the product.

10. The grid product demolding ejection device according to claim 1, characterized in that, The number of the fixing mechanisms (4) is at least two, and the at least two fixing mechanisms (4) are arranged at intervals around the first top plate (21) and the second top plate (31).

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