Top plate linkage locking structure of injection mold with detachable and replaceable special-shaped cavity

Abstract

The invention belongs to the technical field of molds, and particularly relates to a top plate linkage locking structure of a special-shaped cavity detachable injection mold, which comprises a molding mechanism, a self-locking mechanism, a pre-pressing and gap eliminating mechanism and a gradual ejection mechanism, the molding mechanism comprises a movable mold piece, a fixed mold piece and a special-shaped cavity module, the movable mold part comprises a supporting base, an ejector plate and a movable mold plate, when mold closing is started and the movable mold plate moves towards the fixed mold part, the self-locking mechanism automatically locks the special-shaped cavity module on the movable mold plate, and when the movable mold plate is away from the fixed mold part, the self-locking mechanism is automatically unlocked; when the self-locking mechanism is automatically unlocked, the pre-pressing mechanism is automatically driven to pre-press the top of the ejector plate; in the process that the movable mold piece is far away from the fixed mold piece, the gradual-out type ejection mechanism works to drive the ejection plate to eject slowly and then eject quickly, and the problems that time is wasted in the dismounting and replacing process through bolt locking, so that the production efficiency is affected, and meanwhile, an ejection plate is prone to being damaged during ejection are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and in particular to a top plate linkage locking structure of a detachable injection mold with a special-shaped cavity. Background Art

[0002] As the core equipment for the production of complex plastic parts, the performance of injection molds directly affects the precision, efficiency and cost of the products. Especially under the trend of multiple varieties and small batches, special-shaped cavity removable molds have become an important development direction in the industry because they can quickly adapt to different product structures.

[0003] Since the removable injection mold needs to be fixedly installed on the mold during use, the existing fixing method is mainly to lock it by bolts. However, for injection molds with special-shaped cavities that need to be frequently replaced during the actual production process, fixing with bolts is relatively cumbersome, which greatly affects production efficiency. At the same time, in the process of mold opening and ejecting material, since the special-shaped cavity mold is fixed by bolts, the whole is tightly stretched, and then in the process of rapid ejection of the top plate, it is easy to bounce due to uneven force, which in turn causes damage to the material or mold. Summary of the Invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid blurring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0005] Therefore, the purpose of the present invention is to provide a top plate linkage locking structure for a detachable injection mold with a special-shaped cavity, which replaces the traditional way of fixing the detachable injection mold with a special-shaped cavity during production and use, avoiding the waste of time in the process of disassembly and replacement by bolt locking, thereby affecting production efficiency, and easily causing damage to the top plate when it is ejected.

[0006] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A top plate linkage locking structure for a detachable injection mold with a special-shaped cavity, comprising:

[0008] A molding mechanism comprising a movable mold, a fixed mold, and a special-shaped cavity module located at one end of the movable mold adjacent to the fixed mold, wherein the movable mold comprises a support base, an ejector plate mounted on top of the base, and a movable mold plate mounted on top of the ejector plate, wherein the special-shaped cavity module is mounted on top of the movable mold plate via a latch;

[0009] A self-locking mechanism is installed on the movable platen, wherein when the mold is closed and the movable platen moves toward the fixed mold part, the self-locking mechanism automatically locks the special-shaped cavity module on the movable platen, and when the mold is opened and the movable platen moves away from the fixed mold part, the self-locking mechanism automatically unlocks;

[0010] a pre-pressing and gap elimination mechanism, which is mounted on the ejector plate, wherein when the movable platen moves away from the fixed die and the self-locking mechanism is automatically unlocked, the pre-pressing mechanism is automatically driven to pre-press the top of the ejector plate;

[0011] A gradual ejection mechanism is installed on the ejection plate, wherein when the movable mold moves away from the fixed mold, the gradual ejection mechanism works to drive the ejection plate to eject slowly first and then quickly.

[0012] As a preferred solution of the top plate linkage locking structure of a detachable injection mold with a special-shaped cavity described in the present invention, the self-locking mechanism includes a movable locking block movably mounted on the movable mold plate and a locking pressure block located at the bottom of the fixed mold part and transmission connected to the movable locking block.

[0013] As a preferred solution of the top plate linkage locking structure of the special-shaped cavity detachable injection mold described in the present invention, the two sides of the special-shaped cavity module are provided with locking grooves, and the two sides of the top of the movable plate are provided with limiting sliding grooves;

[0014] The bottom of the movable locking block extends into the limiting slide groove and one side corresponds to the locking groove. The side wall of the movable locking block has a first elastic member connected to the inner wall of the limiting slide groove at the other end. One side of the movable locking block has a slope structure corresponding to the locking pressure block.

[0015] As a preferred solution of the top plate linkage locking structure of the special-shaped cavity detachable injection mold described in the present invention, the top of the special-shaped cavity module has a receiving groove connected to the locking groove;

[0016] The self-locking mechanism also includes a die surface self-cleaning component, which includes an annular cutting blade located in the receiving groove and having multiple second elastic parts at the bottom, and an extrusion bevel block located on both sides of the annular cutting blade and corresponding to the movable locking block.

[0017] As a preferred solution of the top plate linkage locking structure of a detachable injection mold with a special-shaped cavity described in the present invention, the pre-compression and intermittent elimination mechanism includes pre-compression wedge blocks located on both sides of the top of the ejector plate, a first transmission assembly that is transmission-connected to the movable locking block, and a reset member installed on the top of the ejector plate and corresponding to the fixed mold part.

[0018] As a preferred solution of the top plate linkage locking structure of the special-shaped cavity detachable injection mold described in the present invention, the top two sides of the movable platen are provided with first hinged frames;

[0019] The first transmission assembly includes a first hinged rod with one end hinged to the side wall of the movable locking block, a pre-stressing lever with one end hinged to the other end of the first hinged rod and the middle part hinged to the first hinged frame, and a roller located on the pre-stressing lever away from the first hinged rod and corresponding to the top of the pre-stressing wedge block.

[0020] As a preferred solution of the top plate linkage locking structure of a special-shaped cavity removable injection mold described in the present invention, the reset part includes a reset rod located at the top of the ejector plate and passing through the movable mold plate and corresponding to the bottom of the fixed mold part, and a reset spring sleeved on the reset rod.

[0021] As a preferred solution of the top plate linkage locking structure of the special-shaped cavity detachable injection mold described in the present invention, the top two sides of the ejector plate are provided with second hinged frames;

[0022] The gradual ejection mechanism includes a pressure lever whose middle part is hinged on the second hinged frame and one end corresponds to the top of the roller, and a second transmission assembly whose one end is transmission connected to the pressure lever and the other end is transmission connected to the fixed mold.

[0023] As a preferred solution of the top plate linkage locking structure of the special-shaped cavity detachable injection mold described in the present invention, two sets of third hinged frames are symmetrically distributed on both side walls of the movable platen;

[0024] The second transmission assembly includes a second hinged rod with one end hinged on the third hinged frame and a trigger rod located at the bottom of the fixed mold and corresponding to the dripping hinged rod. A shift rod corresponding to the end of the pressure lever away from the roller is connected between the two groups of second hinged rods on the same side, and a low-speed driving surface and a high-speed driving surface are distributed on the bottom of the trigger rod in sequence.

[0025] As a preferred solution of the top plate linkage locking structure of a detachable injection mold with a special-shaped cavity described in the present invention, the gradual ejection mechanism also includes an end buffer assembly, which includes a limiting ring located on the inner wall of the groove at the top of the support seat and multiple groups of third elastic members located at the bottom of the ejection plate.

[0026] Compared with the prior art, the present invention has the beneficial effect that the top plate linkage locking structure of the special-shaped cavity removable injection mold automatically locks the special-shaped cavity module to the top of the dynamic template through the self-locking mechanism when the mold is closed, and automatically unlocks it when the mold is opened, so that it is more convenient when different special-shaped cavity molds need to be replaced. When the self-locking mechanism is unlocked, the pre-pressing and gap elimination mechanism automatically pre-presses the ejector plate, thereby effectively compensating for the slight gap between the parts inside the ejector plate or between the parts and the mounting holes due to thermal expansion differences, processing tolerances or slight wear, thereby improving the subsequent ejection accuracy. The gradual ejection mechanism works so that the ejector plate ejects slowly and then quickly, thereby creating a buffer space during ejection to avoid damage to parts caused by rapid ejection at the beginning. It replaces the traditional method of fixing the special-shaped cavity removable injection mold during production and use, avoiding the time wasted in the process of disassembly and replacement by bolt locking, thereby affecting production efficiency, and easily causing damage to the top plate during ejection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort. Among them:

[0028] Figure 1 This is a structural schematic diagram of a self-locking mechanism of a top plate linkage locking structure of a detachable injection mold with a special-shaped cavity according to the present invention when locked;

[0029] Figure 2 This is a structural schematic diagram of a self-locking mechanism of a top plate linkage locking structure of a detachable injection mold with a special-shaped cavity according to the present invention when it begins to unlock;

[0030] Figure 3 This is a structural exploded view of the top plate linkage locking structure of a detachable injection mold with a special-shaped cavity according to the present invention;

[0031] Figure 4 This is an exploded view of the connection structure between the movable mold part and the special-shaped cavity module of the top plate linkage locking structure of a special-shaped cavity detachable injection mold of the present invention;

[0032] Figure 5 This is an exploded view of the connection structure between the self-locking mechanism and the pre-pressing and gap elimination mechanism of the top plate linkage locking structure of a special-shaped cavity detachable injection mold of the present invention;

[0033] Figure 6The present invention is a structural schematic diagram of a gradual ejection mechanism of a top plate linkage locking structure of a detachable injection mold with a special-shaped cavity.

[0034] In the figure: 100, forming mechanism; 110, movable mold; 110a, support seat; 110b, ejector plate; 110b-1, second hinge frame; 110c, movable template; 110c-1, limiting slide; 110c-2, first hinge frame; 110c-3, third hinge frame; 120, fixed mold; 130, special-shaped cavity module; 130a, locking groove; 130b, storage groove; 200, self-locking mechanism; 210, movable locking block; 210a, first elastic member; 220, locking pressure block; 230, mold surface self-cleaning component; 230a, annular cutting blade; 230a-1, first Two elastic members; 230b, extrusion ramp block; 300, pre-stressing and gap elimination mechanism; 310, pre-stressing wedge block; 320, second transmission assembly; 320a, first hinged rod; 320b, pre-stressing lever; 320c, roller; 330, reset member; 400, gradual ejection mechanism; 410, pressure lever; 420, second transmission assembly; 420a, second hinged rod; 420a-1, shift lever; 420b, trigger lever; 420b-1, low-speed driving surface; 420b-2, high-speed driving surface; 430, end buffer assembly; 430a, limit ring; 430b, third elastic member. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0036] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing the embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0037] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0038] The present invention provides a top plate linkage locking structure for a detachable injection mold with a special-shaped cavity, which replaces the traditional method of fixing the detachable injection mold with a special-shaped cavity during production and use, avoids the problem of wasting time during the disassembly and replacement process by bolt locking, thereby affecting production efficiency and easily causing damage to the top plate when it is ejected.

[0039] Figures 1-6The figure shows a schematic diagram of the top plate linkage locking structure of a detachable injection mold with a special-shaped cavity according to the present invention. Figures 1-6 A detailed introduction is given to the top plate linkage locking structure of this type of special-shaped cavity removable injection mold.

[0040] Example 1

[0041] refer to Figures 1-6 The present invention discloses a top plate linkage locking structure of a detachable injection mold with a special-shaped cavity, the main body of which includes a molding mechanism 100, a self-locking mechanism 200, a pre-pressing and gap elimination mechanism 300 and a gradual ejection mechanism 400.

[0042] refer to Figures 1-4 The molding mechanism 100 includes a movable mold 110, a fixed mold 120, and a special-shaped cavity module 130 located at one end of the movable mold 110 adjacent to the fixed mold 120. The movable mold 110 includes a support base, an ejector plate 110b installed on the top of the base, and a movable mold plate 110c installed on the top of the ejector plate 110b. The special-shaped cavity module 130 is installed on the top of the movable mold plate 110c through a latch. The support base is used to support the entire movable mold 110. The ejector plate 110b is used to eject the movable mold plate 110c and the special-shaped cavity module 130 when the mold is opened. The movable mold plate 110c is used to install the special-shaped cavity module 130. The special-shaped cavity module 130 is used to cooperate with the cavity at the bottom of the fixed mold 120 to form a molding chamber.

[0043] refer to Figures 1-6 The self-locking mechanism 200 is used to automatically lock the special-shaped cavity module 130 when the mold is closed. The self-locking mechanism 200 is installed on the movable platen 110c. When the mold is closed, the movable platen 110c moves toward the fixed mold part 120, and the self-locking mechanism 200 automatically locks the special-shaped cavity module 130 on the movable platen 110c. When the mold is opened, the movable platen 110c is away from the fixed mold part 120, and the self-locking mechanism 200 is automatically unlocked. Therefore, when the mold is closed, when the driving member drives the movable mold part 110 to move toward the fixed mold part 120, the self-locking mechanism 200 automatically locks the special-shaped cavity module 130 on the movable mold part 110c. During the mold opening process, when the movable mold part 110 is away from the fixed mold part 120, the self-locking mechanism 200 is automatically unlocked, thereby loosening the special-shaped cavity module 130, thereby facilitating the timely and rapid replacement of the special-shaped cavity module 130 according to production needs.

[0044] refer to Figures 1-6The pre-pressing and gap eliminating mechanism 300 is used to pre-press the ejector plate 110b at the beginning of mold opening, so as to avoid the ejector plate 110b from rapidly shifting and causing a gap to appear at the bottom, thereby affecting the accuracy of subsequent ejection. The pre-pressing and gap eliminating mechanism 300 is installed on the ejector plate 110b. When the movable plate 110c is away from the fixed mold part 120 and the self-locking mechanism 200 is automatically unlocked, the pre-pressing mechanism is automatically driven to pre-press the top of the ejector plate 110b. Therefore, during the mold opening process, when the self-locking mechanism 200 is automatically unlocked, the pre-pressing and gap eliminating mechanism 300 is automatically driven to work, and the top of the ejector plate 110b is pre-pressed, thereby avoiding the ejector plate 110b from shifting too early and causing the ejection gap to appear too early.

[0045] refer to Figures 1-6 The gradual ejection mechanism 400 is used to gradually eject the ejection plate 110b during the mold opening process as the pre-pressing and gap elimination mechanism 300 works. The gradual ejection mechanism 400 is installed on the ejection plate 110b. When the movable mold 110 moves away from the fixed mold 120, the gradual ejection mechanism 400 works to drive the ejection plate 110b to eject slowly first and then quickly. As the pre-pressing and gap elimination mechanism 300 works and generates heat, as the mold opening continues, the gradual ejection mechanism 400 works to drive the ejection plate 110b to eject slowly first and then quickly, thereby creating a buffer gap during the ejection process, thereby avoiding the ejection plate 110b from being ejected quickly when the mold is just opened and the entire mold is still very tight, resulting in ejection deformation and severe wear.

[0046] In this embodiment, the specific use process is as follows: first, the special-shaped cavity module 130 required for production is placed on the top of the movable plate 110c through the latch. When the mold is closed, as the movable plate 110c moves toward the fixed mold 120, the self-locking mechanism 200 automatically starts to work, locking the special-shaped cavity module 130 on the top of the movable plate 110c. When the mold is opened, the movable plate 110c is moved away from the fixed mold 120, and the self-locking mechanism 200 is automatically released, so that different special-shaped cavity modules 130 can be replaced quickly and timely according to production needs. When the self-locking mechanism 200 is unlocked, the pre-compression and clearance are automatically driven. The elimination mechanism 300 works to pre-press the top of the ejection plate 110b, thereby preventing the ejection plate 110b from being ejected at the beginning of mold opening, which would cause premature gaps between components and affect the accuracy of subsequent ejection. During the pre-pressing and elimination process, and as the mold opening continues, the gradual ejection mechanism 400 starts to work, driving the ejection plate 110b to eject slowly first and then quickly, thereby creating a buffer gap, avoiding the problem of rapid ejection at the beginning of mold opening when the entire mold is still relatively tight, which is likely to cause deformation and severe wear.

[0047] Example 2

[0048] Based on Example 1, Figure 1-Figure 5 The self-locking mechanism 200 includes a movable locking block 210 movably mounted on the movable template 110c and a locking pressure block 220 located at the bottom of the fixed mold 120 and transmission-connected to the movable locking block 210. The movable locking block 210 is used to cooperate with the locking groove 130a to lock the special-shaped cavity module 130 on the top of the movable template 110c. The locking pressure block 220 is used to drive the movable locking block 210 to be inserted into the locking groove 130a when the movable template 110c moves toward the fixed mold 120 and contacts the movable locking block 210.

[0049] In this embodiment, reference Figure 1-Figure 5 , the special-shaped cavity module 130 has locking grooves 130a on both sides, which are used to cooperate with one end of the movable locking block 210 to lock the special-shaped cavity module 130 and the movable template 110c, and the top of the movable template 110c has limiting sliding grooves 110c-1 on both sides for sliding connection with the movable locking block 210;

[0050] refer to Figure 1-Figure 5The bottom of the movable locking block 210 extends into the limiting slide groove 110c-1 and one side corresponds to the locking groove 130a. The side wall of the movable locking block 210 has a first elastic member 210a connected to the inner wall of the limiting slide groove 110c-1 at the other end, which is used to pull the movable locking block 210 out of the locking groove 130a by its own rebound force after the mold is opened. One side of the movable locking block has a slope structure corresponding to the locking pressure block 220, which is used to facilitate it to squeeze the side of the movable locking block 210 adjacent to the locking groove 130a when the locking pressure block 220 contacts it.

[0051] In this embodiment, reference Figure 1-Figure 5 The top of the special-shaped cavity module 130 has a receiving groove 130b connected to the locking groove 130a, which is used to facilitate the storage of the annular cutting blade 230a;

[0052] refer to Figure 1-Figure 5 The self-locking mechanism 200 also includes a mold surface self-cleaning component 230, which is used to automatically clean the mold surface at the top of the special-shaped cavity module 130 when the movable locking block 210 is inserted into the locking groove 130a after the mold is closed. The mold surface self-cleaning component 230 includes an annular cutting blade 230a located in the receiving groove 130b and having multiple second elastic members 230a-1 at the bottom, and an extrusion bevel block 230b located on both sides of the annular cutting blade 230a and corresponding to the movable locking block 210. The annular cutting blade 230a is used to cut impurities such as burrs generated when the top of the special-shaped cavity module 130 is closed when the mold is closed when the annular cutting blade 230a moves upward from the receiving groove 130b. The second elastic member 230a-1 is used to pull the annular cutting blade 230a back into the receiving groove 130b by its own elastic force after the movable locking block 210 is away from the locking groove 130a. The extrusion bevel block 230b is used to extrude the annular cutting edge 230a upward as a whole when one side of the movable locking block 210 contacts and presses it.

[0053] In this embodiment, the specific working process is as follows: when the mold is closed, as the movable template 110c moves toward the fixed mold part 120, when the bottom of the locking pressure block 220 contacts the inclined surface of the movable locking block 210, the movable locking block 210 is squeezed. At this time, one side of the movable locking block 210 receives the squeezing force and moves along the limiting slide groove 110c-1 toward one side of the locking groove 130a until it is inserted into the locking groove 130a, completing the locking work between the special-shaped cavity module 130 and the movable template 110c. At this time, the first elastic member 210a is stretched. When During mold opening, as the movable mold plate 110c moves away from the fixed mold part 120, when the locking pressure block 220 gradually separates from the inclined surface of the movable locking block 210, the movable locking block 210 is gradually pulled out of the locking groove 130a under the reaction force of the first elastic member 210a, thereby completing automatic unlocking, thereby facilitating the staff to quickly and timely replace different special-shaped cavity modules 130 according to production needs. The mold surface self-cleaning component 230 also automatically cuts the flash on the top mold surface of the special-shaped cavity module 130, thereby reducing the workload of subsequent reprocessing of the molding material.

[0054] During the mold closing and opening process, with the mechanical linkage with the self-locking mechanism 200, when the first elastic member 210a is stretched, it also has the function of offsetting part of the overall linear expansion of the special-shaped cavity module 130 under high temperature, avoiding the locking stress causing micro-deformation of the module. At the same time, during the mold closing process, when the two sets of movable locking blocks 210 are simultaneously inserted into the locking grooves 130a on both sides of the special-shaped cavity module 130, it also plays a role in automatically correcting the installation eccentricity, thereby eliminating the problem of mold line overflow caused by unilateral locking.

[0055] Example 3

[0056] Based on Example 2, Figure 1-Figure 5 The pre-stressing and intermittent elimination mechanism includes pre-stressing wedge blocks 310 located on both sides of the top of the ejector plate 110b, a first transmission assembly 320 that is transmission-connected to the movable locking block 210, and a reset member 330 installed on the top of the ejector plate 110b and corresponding to the fixed mold member 120. The pre-stressing oblique block is used to apply pressure to the ejector plate 110b after the top is subjected to pressure, while preventing the roller 320c from directly contacting the top of the ejector plate 110b, which would cause damage to the top of the ejector plate 110b. The first transmission assembly 320 is used to automatically pre-stress the top of the pre-stressing wedge block 310 when the self-locking mechanism 200 is unlocked. The reset member 330 is used to reset the ejector plate 110b after the mold is closed, thereby avoiding a gap at the bottom of the ejector plate 110b when the mold is closed, and facilitating the ejection work of the ejector plate 110b when the mold is subsequently opened.

[0057] In this embodiment, reference Figure 1-Figure 5, the top two sides of the movable template 110c are provided with first hinge frames 110c-2 for facilitating the hinge connection of the pre-compression lever 320b;

[0058] refer to Figure 1-Figure 5 The first transmission assembly 320 includes a first hinged rod 320a hinged at one end to the side wall of the movable locking block 210, a pre-stressing lever 320b hinged at one end to the other end of the first hinged rod 320a and hinged at the middle to the first hinged frame 110c-2, and a roller 320c located at the pre-stressing lever 320b away from the first hinged rod 320a and corresponding to the top of the pre-stressing wedge block 310. The first hinged rod 320a is used to drive one end of the pre-stressing lever 320b to lift upward when the movable locking block 210 moves toward it, and the pre-stressing lever 320b is used to drive the other end of the driving roller 320c to move downward after the first hinged rod 320a drives one end to lift. The roller 320c is used to apply pressure to the top of the pre-stressing wedge block 310 when the pre-stressing lever 320b drives it to move downward when it flips, thereby pre-stressing the ejection plate 110b.

[0059] In this embodiment, reference Figure 1-Figure 5 The reset member 330 includes a reset rod located at the top of the ejector plate 110b and passing through the movable plate 110c and corresponding to the bottom of the fixed mold part 120, and a reset spring sleeved on the reset rod. The reset rod is used in the process of mold closing. When the top of the reset rod contacts the bottom of the fixed mold part 120, the reset rod is squeezed downward, thereby driving the ejector plate 110b to move downward, thereby cooperating with the tension of the reset spring to reset, thereby facilitating the ejection work during the subsequent mold opening.

[0060] In this embodiment, the specific working process is as follows: during the mold closing process, when the top of the reset rod is squeezed by the bottom of the fixed mold part 120, the reset rod and the ejector plate 110b are driven to move downward, and at the same time, the stretched reset spring is cooperated to complete the reset of the ejector plate 110b, thereby facilitating the ejection work during the subsequent mold opening. When the mold is opened, when the locking block 210 is moved away from the locking groove 130a, the pre-compression lever 320b is driven to flip around the first hinge frame 110c-2 as the axis under the connection action of the first hinge rod 320a, thereby driving the roller 320c to move downward, applying pressure to the top of the pre-compression wedge block 310, and thus completing the pre-compression work of the ejector plate 110b at the beginning of the mold opening, thereby preventing the ejector plate 110b from being displaced too early and causing the gap to appear too early;

[0061] With the mechanical linkage between the movable locking block 210 and the preload and clearance elimination mechanism 300, preload is applied to the ejector plate 110b before the actual ejection action begins. This effectively compensates for the slight gaps between the ejector pin / ejector rod and the mounting hole, or within the ejector plate 110b, caused by thermal expansion differences, machining tolerances, or slight wear. This ensures that all ejector components begin to move synchronously, without lag, or impact, the moment the ejection command is issued. This greatly improves ejection accuracy and prevents product deformation, whitening, or damage caused by local ejection delays or impacts. This is especially critical for thin-walled or precision-shaped parts.

[0062] Example 4

[0063] Based on Example 3, Figures 1-6 , the top two sides of the ejection plate 110b are provided with second hinged frames 110b-1 for facilitating the hinged pressure lever 410;

[0064] refer to Figures 1-6 The gradual ejection mechanism 400 includes a pressure lever 410 whose middle portion is hinged on the second hinged frame 110b-1 and one end corresponds to the top of the roller 320c, and a second transmission assembly 420 with one end transmission connected to the pressure lever 410 and the other end transmission connected to the fixed mold member 120. The pressure lever 410 is used to apply pressure to the top of the roller 320c when rotating, thereby allowing the ejection work to continue. The second transmission assembly 420 is used to drive the pressure lever 410 to gradually apply pressure to the top of the roller 320c as the mold opening continues while the roller 320c pre-presses the ejection plate 110b.

[0065] In this embodiment, reference Figures 1-6 , two sets of third hinged frames 110c-3 are symmetrically distributed on both side walls of the movable template 110c, for facilitating the hinged connection of the second hinged rod 420a;

[0066] refer to Figures 1-6The second transmission assembly 420 includes a second hinged rod 420a having one end hinged on the third hinged frame 110c-3 and a trigger rod 420b located at the bottom of the fixed mold 120 and corresponding to the dripping hinge rod. When the second hinged rod 420a contacts the side wall of the trigger rod 420b, the side wall of the trigger rod 420b squeezes the second hinged rod 420a, causing the second hinged rod 420a to rotate toward the side adjacent to the movable mold plate 110c, thereby driving the shift rod 420a-1 to move outward. The trigger rod 420b is used to limit and fix the free end of the second hinged rod 420a as the movable mold 110 continues to move away from the fixed mold 120 during mold opening. The two groups of second hinged rods 420a on the same side are connected with a shift rod 420a-1 corresponding to the end of the pressure lever 410 away from the roller 320c, which is used when the two second hinged rods 420a When it rotates toward the side adjacent to the movable template 110c and drives it to move outward, the end of the pressure lever 410 away from the roller 320c is lifted upward, and the other end of the pressure lever 410 moves downward to pressurize the roller 320c. The bottom of the trigger rod 420b is sequentially provided with a low-speed driving surface 420b-1 and a high-speed driving surface 420b-2, which is used to drive the pressure lever 410 to squeeze the roller 320c at a low speed when the low-speed driving surface 420b-1 contacts the side wall of the second hinge rod 420a, and when the high-speed driving surface 420b-2 contacts the second hinge rod 420a, the pressure lever 410 is driven to squeeze the roller 320c at a high speed, so that the ejection plate 110b is ejected slowly first and then quickly, thereby creating an ejection buffer gap when the mold is just started and the whole is still relatively tight.

[0067] In this embodiment, reference Figures 1-6 The gradual ejection mechanism 400 also includes an end buffer assembly 430 for buffering and absorbing the kinetic energy of the later stage of high-speed ejection. The end buffer assembly 430 includes a limit ring 430a located on the inner wall of the groove at the top of the support seat 110a and multiple groups of third elastic members 430b located at the bottom of the ejection plate 110b. The limit ring 430a is used to limit the maximum ejection stroke of the ejection plate 110b. The third elastic member 430b is used to buffer the space between the ejection plate 110b and the support base through its own reaction force during high-speed ejection, thereby absorbing the impact energy.

[0068] In this embodiment, the specific working process is as follows: when the mold is opened, the roller 320c of the pre-pressing and gap elimination mechanism 300 pre-presses the ejector plate 110b. As the movable plate 110c gradually moves away from the fixed mold 120, when the side wall of the second hinge rod 420a contacts the low-speed driving surface 420b-1 of the trigger rod 420b, the second hinge rod 420a is driven to rotate, thereby driving the shift rod 420a-1 to move synchronously toward the side adjacent to the movable plate 110c, thereby driving the pressure lever 410 to rotate. , thereby applying pressure to the top of the roller 320c, causing the ejection plate 110b to perform the ejection operation. When the high-speed driving surface 420b-2 of the trigger rod 420b contacts the side wall of the second hinge rod 420a, the rotation angle of the second hinge rod 420a increases, indirectly driving the rotation angle of the pressure lever 410 to increase, thereby increasing the pressure on the roller 320c, driving the ejection plate 110b to perform rapid ejection. In this process, by gradually applying pressure to eject, the problem of severe wear when the mold is initially tight can be avoided.

[0069] In addition, when the mold is opened, as the ejector plate 110b ejects at high speed, the end buffer assembly 430 buffers and absorbs the impact energy, thereby effectively preventing the product from bouncing, scratching or deforming due to sudden stopping at the moment of complete demolding, greatly reducing the impact wear and noise of parts such as the ejector plate 110b and the limit block, extending the mold life and improving ejection reliability.

[0070] Although the present invention has been described above with reference to embodiments, various modifications may be made thereto and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as there are no structural conflicts, the various features of the embodiments disclosed herein may be combined with each other in any manner, and the omission of an exhaustive description of such combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A top plate linkage locking structure for a detachable injection mold with a special-shaped cavity, characterized in that: include: A molding mechanism (100) comprising a movable mold (110), a fixed mold (120), and a special-shaped cavity module (130) located at one end of the movable mold (110) adjacent to the fixed mold (120), wherein the movable mold (110) comprises a supporting base, an ejection plate (110b) mounted on the top of the base, and a movable mold plate (110c) mounted on the top of the ejection plate (110b), wherein the special-shaped cavity module (130) is mounted on the top of the movable mold plate (110c) via a latch; a self-locking mechanism (200) mounted on the movable die plate (110c), wherein when mold closing begins and the movable die plate (110c) moves toward the fixed die member (120), the self-locking mechanism (200) automatically locks the special-shaped cavity module (130) on the movable die plate (110c), and when the mold is opened and the movable die plate (110c) moves away from the fixed die member (120), the self-locking mechanism (200) automatically unlocks; a pre-pressing and gap elimination mechanism (300) mounted on the ejector plate (110b), wherein when the movable die plate (110c) moves away from the fixed die member (120) and the self-locking mechanism (200) is automatically unlocked, the pre-pressing mechanism is automatically driven to pre-press the top of the ejector plate (110b); A gradual ejection mechanism (400) is mounted on the ejection plate (110b), wherein when the movable mold (110) moves away from the fixed mold (120), the gradual ejection mechanism (400) operates to drive the ejection plate (110b) to eject slowly first and then quickly.

2. The top plate linkage locking structure of a detachable injection mold with a special-shaped cavity according to claim 1, characterized in that: The self-locking mechanism (200) comprises a movable locking block (210) movably mounted on the movable die plate (110c) and a locking pressure block (220) located at the bottom of the fixed die (120) and transmission-connected to the movable locking block (210).

3. The top plate linkage locking structure of a detachable injection mold with a special-shaped cavity according to claim 2, characterized in that: The two sides of the special-shaped cavity module (130) are provided with locking grooves (130a), and the two sides of the top of the movable template (110c) are provided with limiting sliding grooves (110c-1); The bottom of the movable locking block (210) extends into the limiting sliding groove (110c-1) and one side corresponds to the locking groove (130a); the side wall of the movable locking block (210) has a first elastic member (210a) whose other end is connected to the inner wall of the limiting sliding groove (110c-1); and one side of the movable locking block has an inclined surface structure corresponding to the locking pressure block (220).

4. The top plate linkage locking structure of a detachable injection mold with a special-shaped cavity according to claim 3, characterized in that: The top of the special-shaped cavity module (130) has a receiving groove (130b) communicating with the locking groove (130a); The self-locking mechanism (200) further comprises a die surface self-cleaning assembly (230), the die surface self-cleaning assembly (230) comprising an annular cutting blade (230a) located in the receiving groove (130b) and having a plurality of second elastic members (230a-1) at the bottom, and extrusion bevel blocks (230b) located on both sides of the annular cutting blade (230a) and corresponding to the movable locking block (210).

5. The top plate linkage locking structure of a detachable injection mold with a special-shaped cavity according to claim 3, characterized in that: The pre-pressing and intermittent elimination mechanism comprises pre-pressing wedge blocks (310) located on both sides of the top of the ejection plate (110b), a first transmission assembly (320) transmission-connected to the movable locking block (210), and a reset member (330) mounted on the top of the ejection plate (110b) and corresponding to the fixed mold member (120).

6. The top plate linkage locking structure of a detachable injection mold with a special-shaped cavity according to claim 5, characterized in that: The movable template (110c) has first hinged frames (110c-2) on both sides of the top; The first transmission assembly (320) comprises a first hinged rod (320a) hinged at one end to the side wall of the movable locking block (210), a pre-stressing lever (320b) hinged at one end to the other end of the first hinged rod (320a) and hinged at the middle to the first hinged frame (110c-2), and a roller (320c) located on the pre-stressing lever (320b) away from the first hinged rod (320a) and corresponding to the top of the pre-stressing wedge block (310).

7. The top plate linkage locking structure of a detachable injection mold with a special-shaped cavity according to claim 5, characterized in that: The reset member (330) comprises a reset rod located at the top of the ejection plate (110b) and passing through the movable die plate (110c) and corresponding to the bottom of the fixed die member (120), and a reset spring sleeved on the reset rod.

8. The top plate linkage locking structure of a detachable injection mold with a special-shaped cavity according to claim 6, characterized in that: The top of the ejection plate (110b) is provided with second hinged frames (110b-1) on both sides; The gradual ejection mechanism (400) comprises a pressure lever (410) whose middle portion is hinged on the second hinged frame (110b-1) and whose one end corresponds to the top of the roller (320c); and a second transmission assembly (420) whose one end is transmission-connected to the pressure lever (410) and whose other end is transmission-connected to the fixed mold (120).

9. The top plate linkage locking structure of a detachable injection mold with a special-shaped cavity according to claim 8, characterized in that: Two sets of third hinged frames (110c-3) are symmetrically distributed on both side walls of the movable template (110c); The second transmission assembly (420) comprises a second hinged rod (420a) hinged at one end to the third hinged frame (110c-3) and a trigger rod (420b) located at the bottom of the fixed mold (120) and corresponding to the drip hinged rod. A shift rod (420a-1) corresponding to the end of the pressure lever (410) away from the roller (320c) is connected between the two groups of the second hinged rods (420a) on the same side. A low-speed driving surface (420b-1) and a high-speed driving surface (420b-2) are sequentially distributed on the bottom of the trigger rod (420b).

10. The top plate linkage locking structure of a detachable injection mold with a special-shaped cavity according to claim 8, characterized in that: The gradual ejection mechanism (400) further comprises an end buffer assembly (430), the end buffer assembly (430) comprising a limiting ring (430a) located on the inner wall of the groove at the top of the support seat (110a) and a plurality of groups of third elastic members (430b) located at the bottom of the ejection plate (110b).

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