An automatic in-mold cutting injection mold for thin-walled small window products

Abstract

The present application relates to an automatic in-mold water-gate cutting injection mold for a thin-walled small window product, comprising a stripping plate, a front template, a rear template, a front template insert, a rear template insert, an insert ejection mechanism and an ejector mechanism; a first cavity surface is provided on the front template, a second cavity surface is provided on the rear template, and a product cavity is formed between the first cavity surface and the second cavity surface when the mold is closed; a flow channel is provided through the front template insert, and a water-gate bin is provided on the rear template insert, the front template insert and the rear template insert are collinearly arranged in the vertical direction and are slidably mounted on the front template and the rear template respectively; when the mold is closed, the stripping plate presses the front template insert, the front template insert presses the rear template insert, the flow channel is connected to the water-gate bin and the water-gate bin is connected to the product cavity; the insert ejection mechanism is used to drive the rear template insert to slide upward relative to the rear template, and the ejector mechanism is used to eject the product upward; the technical solution of the present application can reduce the pressure loss of the injection molding machine and realize in-mold self-cutting water-gate.

Description

Technical Field

[0001] The present application relates to the technical field of injection molds, and in particular to an automatic in-mold water-cutting injection mold for thin-walled small-window products. Background Art

[0002] Thin-walled small window products are thin-walled plastic products with windows. They are usually produced using injection molds. The method is to inject the heated and melted material into the product cavity under high pressure, and obtain a molded product after cooling and solidification. The injection mold's gluing methods are mostly side gluing, bottom gluing, outer sub-piece gluing and horn gluing. For side gluing and bottom gluing, there will be residual sprues after injection molding, which need to be removed manually. The product is easily scratched by tools, which is not suitable for the production of products with high requirements for surface smoothness, and the production efficiency is low; for the outer fine sprue of the product to sub-piece gluing or horn gluing, the pressure loss of the injection molding machine is large, and it will be difficult to fill thin-walled products, which is easy to cause the risk of shrinkage of the product appearance, bone position imprint and bone position glue shortage. Sub-piece gluing also requires post-processing to remove the residual sprues. Therefore, for the production of thin-walled small window products, in order to avoid damage to the appearance and poor filling, the injection mold needs to reduce the pressure loss of the injection molding machine and automatically cut off the sprue. Summary of the invention

[0003] Based on this, it is necessary to provide an automatic water inlet cutting injection mold for thin-walled small window products that can reduce the pressure loss of the injection molding machine.

[0004] The technical solution of the present invention is as follows: an automatic water-cutting injection mold for thin-walled small window products, comprising a stripping plate, a front template, a rear template, a front template insert, a rear template insert, an insert ejection mechanism and an ejector mechanism, wherein the stripping plate, the front template and the rear template are arranged in sequence from top to bottom; a first cavity surface is provided on the front template, and a second cavity surface is provided on the rear template, and a product cavity is formed between the first cavity surface and the second cavity surface when the mold is closed; a flow channel is opened through the front template insert, and the end opening of the flow channel is a fine water outlet, and a second cavity surface is provided on the rear template insert. A sprue bin is provided on the part, the front template insert and the rear template insert are arranged in the same line in the vertical direction and are slidably installed on the front template and the rear template respectively; when the stripping plate and the front template are molded together, the stripping plate presses the front template insert, and the front template insert presses the rear template insert, the end opening of the flow channel is connected to the sprue bin and the sprue bin is connected to the product cavity; the insert ejection mechanism is used to drive the rear template insert to slide upward relative to the rear template; the ejector mechanism is used to eject the product upward so that the product is separated from the second cavity surface.

[0005] As a further solution of the present application, the insert ejection mechanism includes a first elastic member, which is arranged in the rear template and connects the rear template insert and the rear template. When the stripping plate and the front template are molded together, the first elastic member is in a compressed state.

[0006] As a further solution of the present application, cross-sections of the front template insert and the rear template insert both correspond to viewing windows of the product, a first slide groove corresponding to the product viewing window is opened on the first cavity surface, and the front template insert is installed in the first slide groove, a second slide groove corresponding to the product viewing window is opened on the second cavity surface, and the rear template insert is installed in the second slide groove.

[0007] As a further solution of the present application, a first limit platform is provided on the outer wall of the front template insert, and a first limit groove is opened on the wall surface of the first slide groove, and the first limit platform can slide vertically in the first limit groove so as to have a first lowest position and a first highest position; a second limit platform is provided on the outer wall of the rear template insert, and a second limit groove is opened on the wall surface of the second slide groove, and the second limit platform can slide vertically in the second limit groove so as to have a second lowest position and a second highest position.

[0008] As a further solution of the present application, a pull rod is fixed on the stripping plate. When the mold is closed, the pull rod passes through the front template insert and the lower end is inserted into the rear template insert. The pull rod is slidingly connected to the front template insert and the rear template insert respectively. A locking position is provided at the lower end of the pull rod, and a ball-end screw for cooperating with the locking position is provided on the rear template insert.

[0009] As a further solution of the present application, the ejector mechanism includes a product ejector, a sprue ejector, an ejector plate, a third elastic member and a guide rod, the ejector plate being arranged at intervals below the rear template, one end of the guide rod being fixedly connected to the ejector plate and the other end being slidably connected to the rear template, the third elastic member connecting the ejector plate and the rear template, the third elastic member being used to keep the ejector plate away from the rear template, the product ejector being fixedly connected to the ejector plate, the product ejector slidingly passing through the rear template and extending to the second cavity surface, the sprue ejector being connected to the ejector plate, the sprue ejector slidingly passing through the rear template and extending to the sprue bin, the sprue ejector being slidably connected to the rear template and the rear template insert.

[0010] As a further solution of the present application, the ejector mechanism also includes an accelerated reset ejector, an ejector plate insert and a second elastic member. A third slide groove is opened on the ejector plate. The ejector plate insert is vertically slidably installed in the third slide groove and has a third lowest position and a third highest position in the third slide groove. The second elastic member is vertically arranged and connects the ejector plate insert and the ejector plate. The water outlet ejector and the accelerated reset ejector are both fixedly connected to the ejector plate insert. The accelerated reset ejector passes through the rear template and extends to the inside of the rear template insert. The accelerated reset ejector and the pull rod are arranged in the same line and abut against the pull rod when the mold is closed. The accelerated reset ejector and the rear template and the rear template insert are all slidably connected.

[0011] As a further solution of the present application, it also includes a base, which includes an upper fixed plate, a lower fixed plate and a plurality of vertical rods, the upper fixed plate is arranged above the stripping plate, and the plurality of vertical rods are fixedly connected to the upper fixed plate at intervals, the stripping plate, the front template and the rear template are all slidably connected to the vertical rods, the lower fixed plate is arranged below the rear template and fixedly connected to the rear template, the upper fixed plate is used to connect to the fixed workbench of the injection molding machine, and the lower fixed plate is used to connect to the movable workbench of the injection molding machine.

[0012] As a further solution of the present application, the front template is connected to the rear template via a damping member, and the damping member creates friction between the front template and the rear template.

[0013] As a further solution of the present application, a sprue hook is fixed on the upper fixed plate, the sprue hook penetrates the stripping plate and extends into the flow channel, and the sprue hook is slidably connected to the stripping plate.

[0014] The technical solution of the present application has the following advantages: the fine gate of the flow channel is connected to the gate bin, and the gate bin is connected to the product cavity, thereby forming a glue injection form of the fine gate turning into a large gate side injection, the pressure loss of the injection molding machine is small, and the plastic melt can fill the product cavity more evenly, avoiding the shrinkage of the product appearance and the lack of glue in the bone position; the flow channel and the gate bin are respectively arranged on the front template insert and the rear template insert, and the front template insert and the rear template insert can slide vertically relative to the product cavity. After the stripping plate opens the mold, under the action of the insert ejection mechanism, the rear template insert drives the front template insert to slide upward, so that the gate bin and the product cavity are dislocated in height, thereby automatically cutting off the gate, avoiding gate residue, and no need for post-processing, avoiding damage to the product appearance, while improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of an automatic in-mold water-cutting injection mold for a thin-walled small window product in this application;

[0017] Figure 2 This is one of the cross-sectional schematic diagrams of an automatic in-mold water-cutting injection mold for a thin-walled small window product of this application;

[0018] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0019] Figure 4 This is the second cross-sectional schematic diagram of a thin-walled small window product in-mold automatic water-cutting injection mold of this application, and the cross-sectional diagram shown is similar to Figure 2 The cross sections shown are parallel to each other, showing the installation positions of the damping member and the limiting rod.

[0020] Figure 5 This is the third cross-sectional schematic diagram of a thin-walled small window product in-mold automatic water-cutting injection mold of this application, and the cross-sectional diagram shown is similar to Figure 2 The cross sections shown are vertical, showing the installation positions of ejector pins of some products;

[0021] Description of reference numerals:

[0022] 11. Stripping plate; 111. Stripping plate insert; 21. Front template; 211. Groove; 212. Main flow channel; 22. Front mold core; 221. First cavity surface; 23. Front template insert; 231. Flow channel; 232. First stop platform; 24. First chute; 241. First stop groove; 31. Back template; 32. Back mold core; 321. Second cavity surface; 33. Back template insert; 331. Gate bin; 332. Second stop platform; 34. First elastic member; 35. Second chute; 351. Second stop groove; 40. Product cavity; 51. Upper fixed plate; 511. Nozzle; 512. Gate hook; 52. Lower fixed plate ; 521, ejector hole; 53, vertical rod; 60, pull rod; 70, ball screw; 81, ejector plate; 811, ejector panel; 812, ejector bottom plate; 82, third slide groove; 83, ejector plate insert; 84, second elastic member; 85, guide rod; 86, third elastic member; 91, product ejector; 92, water outlet ejector; 93, accelerated reset ejector; 110, damping member; 120, compression spring; 130, slide rod; 140, long groove. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0029] like Figures 1 to 4 As shown, an automatic in-mold water-cutting injection mold for a thin-walled small window product includes a stripping plate 11, a front template 21, a rear template 31, a front template insert 23, a rear template insert 33, an insert ejection mechanism, an ejector mechanism and a base.

[0030] The stripping plate 11, the front mold plate 21 and the rear mold plate 31 are arranged in sequence from top to bottom; the front mold core 22 is fixedly connected to the lower end of the front mold plate 21, and a first cavity surface 221 is provided on the lower end surface of the front mold core 22; the front mold plate insert 23 is vertically slidably installed on the front mold plate 21, and a flow channel 231 is opened through the front mold plate insert 23, and the end opening of the flow channel 231 is a fine water outlet; the rear mold core 32 is fixedly connected to the upper end of the rear mold plate 31, and a second cavity surface 321 is provided on the upper end surface of the rear mold core 32; the rear mold plate insert 33 is vertically slidably installed on the rear mold plate, and a water outlet bin 331 is opened at the upper end of the rear mold plate insert 33; the front mold plate insert 23 and the rear mold plate insert 33 are vertically slidably installed on the rear mold plate, and a water outlet bin 331 is opened at the upper end of the rear mold plate insert 33; 3 are collinear in the vertical direction. When the front template 21 and the rear template 31 are molded together, a product cavity 40 is formed between the first cavity surface 221 and the second cavity surface 321. At this time, the stripper plate 11 presses the front template insert 23, the front template insert 23 and the rear template insert 33 abut against each other, the end opening of the flow channel 231 is connected to the sprue bin 331, and the sprue bin 331 is connected to the product cavity 40, forming a glue injection form of a narrow sprue to a large sprue side injection; the insert ejection mechanism is used to drive the rear template insert 33 to slide upward relative to the rear template 31; the ejector mechanism is used to eject the product upward so that the product is separated from the second cavity surface 321.

[0031] The base includes an upper fixing plate 51, a lower fixing plate 52 and a plurality of vertical rods 53. The upper fixing plate 51 is used to be connected to a fixed workbench of an injection molding machine, and the lower fixing plate 52 is used to be connected to a movable workbench of the injection molding machine. The upper fixing plate 51 is arranged above the stripping plate 11 and can be molded with the stripping plate 11. A plurality of vertical rods 53 are fixedly connected to the upper fixing plate 51 at intervals. The stripping plate 11, the front template 21 and the rear template 31 are all slidably connected to each vertical rod 53. The stripping plate 11 is connected to the upper fixing plate 51 through a limiting structure so that the stripping plate 11 can move downward a certain distance relative to the upper fixing plate 51. The lower fixing plate 52 is arranged below the rear template 31 and is fixedly connected to the rear template 31. The front template 21 and the rear template 31 are connected through a damping member 110. The damping member 110 creates friction between the front template 21 and the rear template 31, and the stripping plate 11 and the front template 21 are also connected by a limiting structure to limit the downward distance of the front template 21 relative to the stripping plate 11, and a compression spring 120 is provided between the stripping plate 11 and the front template 21 to assist in separating the two; the limiting structure includes a rod with a shoulder and a groove with a hanging platform, and the limiting is achieved by the shoulder abutting the hanging platform; for example, the connection between the stripping plate 11 and the front template 21, a sliding rod 130 with a shoulder is fixedly connected to the stripping plate 11, a long groove 140 for accommodating the sliding rod 130 is provided through the front template 21 and the rear template 31, and a hanging platform is provided on the long groove 140 located in the front template 21.

[0032] When the mold is performing injection molding, the plastic melt flows from the runner 231 into the sprue bin 331, and then flows from the sprue bin 331 into the product cavity 40. The injection method is to inject glue from the narrow sprue to the large sprue side. Under this injection method, the pressure loss of the injection molding machine is small, and the plastic melt can fill the product cavity 40 more evenly, avoiding the shrinkage of the product appearance and the lack of glue in the bone position.

[0033] After injection molding, the rear template 31 is first moved downward under the drive of the injection molding machine, and the front template 21 moves downward together under the action of the damping member 110, and the stripping plate 11 is smoothly opened with the assistance of the compression spring 120. After the stripping plate 11 is opened, it no longer presses the front template insert 23, and under the action of the insert ejection mechanism, the rear template insert 33 and the front template insert 23 move up together, so that the sprue bin 331 is separated from the product cavity 40, thereby realizing the self-cutting sprue in the mold; since the mold can cut the sprue by itself, the product does not need post-processing to cut the remaining sprue, thereby avoiding damage to the product appearance and improving production efficiency. After that, the injection molding machine continues to drive the rear template 31 to move downward. When the shoulder of the slide rod 130 abuts against the hanging platform of the long groove 140, the front template 21 no longer moves downward. After overcoming the friction force of the damping member 110, the front template 21 is opened, and the rear template insert 33 is separated from the front template insert 23. The product remains on the second cavity surface 321. Finally, the product is separated from the second cavity surface 321 by driving the ejector mechanism.

[0034] In some embodiments, the insert ejection mechanism is a first elastic member 34, which is vertically compressed. The first elastic member 34 is arranged in the rear template 31 and the upper and lower ends are respectively connected to the rear template insert 33 and the rear template 31. When the stripping plate 11 and the front template 21 are molded together, the first elastic member 34 is in a compressed state. This arrangement has a simple structure, does not require the addition of other driving sources, and simplifies the mold structure and volume.

[0035] In some embodiments, a first slide groove 24 is opened from the first cavity surface 221 to the upper end surface of the front template 21, and a second slide groove 35 is opened downward from the second cavity surface 321. The front template insert 23 is installed in the first slide groove 24, and the rear template insert 33 is installed in the second slide groove 35. The first slide groove 24 and the second slide groove 35 are both set corresponding to the position of the product viewing window, and the cross-sections of the front template insert 23 and the rear template insert 33 both correspond to the product viewing window. Such an arrangement is for thin-walled small window products, especially products with the small window located in the center or near the center of the product, which further ensures that the plastic melt can be evenly filled in all parts of the product cavity 40 during injection molding.

[0036] refer to Figure 3 and Figure 5 In some embodiments, a sprue hook 512 is fixed on the upper fixed plate 51, and the sprue hook 512 can penetrate the stripping plate 11 and extend into the flow channel 231, and the sprue hook 512 is slidably connected to the stripping plate 11; the plastic melt condensed in the flow channel 231 is the material head, and after the stripping plate 11 is opened, the material head is connected to the sprue hook 512 and thus separated from the front template insert 23; before the front template 21 is opened, the stripping plate 11 is driven by the sliding rod 130 installed in the front template 21 and moves downward a predetermined distance relative to the upper fixed plate 51, so that the stripping plate 11 presses down the material head on the sprue hook 512, thereby removing the material head.

[0037] refer to Figure 5 In some embodiments, a groove 211 is provided on the upper end surface of the front template 21, the bottom surface of the groove 211 is a plane, a main channel 212 is provided on the bottom surface of the groove 211, a stripping plate insert 111 complementary to the groove 211 is provided at the lower end of the stripping plate 11, a nozzle 511 is provided on the upper fixed plate 51, and the nozzle 511 passes through the stripping plate insert 111; the main channel 212 connects the nozzle 511 with the runner 231, so that the plastic melt enters the product cavity 40 along the path of the nozzle 511, the main channel 212, the runner 231, and the sprue bin 331.

[0038] In some embodiments, the sprue bin 331 is connected to the product cavity 40 in a manner of forming a fan-shaped gate, and the fan-shaped gates may be formed in two or more numbers and arranged at intervals.

[0039] In some embodiments, the damping member 110 includes a nylon rubber plug column and a nylon rubber plug hole, which cooperate with each other to generate friction; the nylon rubber plug column and the nylon rubber plug hole can be replaceably arranged on the front template 21 or the rear template 31.

[0040] refer to Figure 3 In some embodiments, a first limiting platform 232 is provided on the outer wall of the front template insert 23, and a first limiting groove 241 is opened on the wall surface of the first slide 24. The first limiting platform 232 can slide vertically in the first limiting groove 241 so as to have a first lowest position and a first highest position relative to the front mold core 22; a second limiting platform 332 is provided on the outer wall of the rear template insert 33, and a second limiting groove 351 is opened on the wall surface of the second slide 35. The second limiting platform 332 can slide vertically in the second limiting groove 351 so as to have a second lowest position and a second highest position relative to the rear mold core; when the mold is not opened, the stripping plate 11 presses the front template insert 23 to make the front template insert 23 It is located at the first lowest position, and the rear template insert 33 is pressed by the front template insert 23 and is located at the second lowest position, and the first elastic member 34 is in a compressed state; after the stripping plate 11 opens the mold first, the first elastic member 34 resets and drives the rear template insert 33 and the front template insert 23 to move upward together, so that the front template insert 23 is located at the first highest position, and the rear template insert 33 is located at the second highest position; this arrangement enables the front template insert 23 and the rear template insert 33 to maintain a stable pressing relationship and will not separate from each other under the action of inertia; it also avoids the situation where the front template insert 23 is separated from the front mold core 22 or the rear template insert 33 is separated from the rear mold core when the front template 21 and the rear template 31 are opened.

[0041] Based on some improved embodiments of the above embodiment, refer to Figure 3 A pull rod 60 is fixed on the stripping plate 11. When the stripping plate 11, the front template 21 and the rear template 31 are molded together, the pull rod 60 passes through the front template insert 23 and the lower end is inserted into the rear template insert 33. The pull rod 60 is slidably connected with the front template insert 23 and the rear template insert 33 respectively, and a clamping position is provided at the lower end of the pull rod 60; a ball screw 70 for cooperating with the clamping position is provided on the rear template insert 33; when the stripping plate 11 is opened, the ball screw 70 is engaged with the clamping position of the pull rod 60, and the rear template insert 33 is not only moved upward relative to the rear mold core 32 by the action of the insert ejection mechanism, but also moved upward relative to the rear mold core 32 by the pulling force of the pull rod 60, ensuring that the rear template insert 33 can reach the second highest position, ensuring the removal of the water outlet; then the mold opening continues, and the ball screw 70 disengages from the pull rod 60.

[0042] In some embodiments, reference Figure 1 and Figure 5The ejector mechanism includes a product ejector 91, a nozzle ejector 92, an ejector plate 81, a guide rod 85 and a third elastic member 86. The ejector plate 81 is spaced below the rear template 31 and above the lower fixed plate 52. The product ejector 91 is fixedly connected to the ejector plate 81. The product ejector 91 penetrates the rear template 31 and extends to the second cavity surface 321. The product ejector 91 is slidably connected to the rear template 31 and the rear mold core 32 respectively. The nozzle ejector 92 is connected to the ejector plate 81. The nozzle ejector 92 slides through the rear template 31 and extends to the nozzle bin 331. The nozzle ejector 92 is slidably connected to the rear template 31 and the rear template insert 33; the guide rod 85 is vertically arranged and fixedly connected to the ejector plate 81, the guide rod 85 is slidably connected to the rear template 31, the third elastic member 86 connects the ejector plate 81 and the rear template 31, under the action of the third elastic member 86, the ejector plate 81 is against the lower fixed plate 52; an ejector hole 521 is opened on the lower fixed plate 52, the ejector of the injection molding machine can pass through the ejector hole 521 to drive the ejector plate 81 to move toward the rear template 31, thereby driving the product ejector 91 to eject the product, and at the same time driving the water outlet ejector 92 to eject the water outlet.

[0043] Based on some improved embodiments of the above embodiment, refer to Figure 1 and Figure 2 A pull rod 60 is fixed on the stripping plate 11. When the stripping plate 11, the front template 21 and the rear template 31 are molded together, the pull rod 60 passes through the front template insert 23 and the lower end is inserted into the rear template insert 33. The pull rod 60 is slidably connected with the front template insert 23 and the rear template insert 33 respectively; a third slide groove 82 is opened on the ejector plate 81, and the ejector plate insert 83 is vertically slidably installed in the third slide groove 82 and has a third lowest position and a third highest position in the third slide groove 82; the second elastic member 84 is vertically arranged and the two ends are respectively connected to the ejector plate insert 83 and the ejector Plate 81; the sprue ejector pin 92 and the accelerating reset ejector pin 93 are both fixedly connected to the ejector plate insert 83, the sprue ejector pin 92 passes through the rear template 31 and extends to the sprue bin 331, the accelerating reset ejector pin 93 passes through the rear template 31 and extends to the inside of the rear template insert 33, the accelerating reset ejector pin 93 is slidably connected to the rear template 31 and the rear template insert 33, the accelerating reset ejector pin 93 and the pull rod 60 are colinearly arranged, when the mold is closed, the accelerating reset ejector pin 93 and the pull rod 60 abut against each other, the second elastic member 84 is in a compressed state, and the ejector plate insert 83 is located at the third lowest position.

[0044] In this embodiment, when the stripping plate 11 opens the mold, the pull rod 60 no longer abuts against the acceleration reset ejector 93, so under the action of the second elastic member 84, the ejector plate insert 83 moves up relative to the ejector plate 81 and is located at the third highest position, and the sprue ejector 92 moves up relative to the product ejector 91 as the ejector plate insert 83 moves, so the sprue ejector 92 will be higher than the product ejector 91, so when the ejector plate 81 subsequently moves toward the rear mold plate 31, the sprue material ejected by the sprue ejector 92 will always be higher than the product ejected by the product ejector 91, so the product will not contact the sprue material again, avoiding the re-bonding of the product that has not been completely cooled to the sprue material.

[0045] In this embodiment, the accelerating reset ejector pin 93 is provided with two accelerating reset ejector pins 93 , and the two accelerating reset ejector pins 93 are relatively arranged on both sides of the nozzle ejector pin 92 ; correspondingly, there are also two pull rods 60 , and the two pull rods 60 are relatively arranged on both sides of the flow channel 231 .

[0046] This embodiment is an embodiment of the lower ejector plate 81, the ejector plate 81 includes an ejector panel 811 and an ejector bottom plate 812, the ejector panel 811 and the ejector bottom plate 812 are connected by a detachable fixing connector such as a screw, which facilitates the installation of the product ejector 91, the ejector plate insert 83 and the second elastic member 84.

[0047] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An automatic in-mold water-cutting injection mold for thin-walled small window products, characterized in that: It comprises a stripping plate, a front template, a rear template, a front template insert, a rear template insert, an insert ejection mechanism and an ejector mechanism, wherein the stripping plate, the front template and the rear template are arranged in sequence from top to bottom; a first cavity surface is arranged on the front template, and a second cavity surface is arranged on the rear template, and a product cavity is formed between the first cavity surface and the second cavity surface when the mold is closed; a flow channel is opened through the front template insert, and the end opening of the flow channel is a fine sprue, and a sprue bin is opened on the rear template insert, and the front template insert and the rear template insert are arranged collinearly in the vertical direction and are slidably mounted on the front template and the rear template respectively; When the mold is closed, the stripper plate presses against the front template insert, the front template insert presses against the rear template insert, the end opening of the flow channel is connected to the sprue bin and the sprue bin is connected to the product cavity; the insert ejection mechanism is used to drive the rear template insert to slide upward relative to the rear template; the ejector mechanism is used to eject the product upward so that the product is separated from the second cavity surface; A pull rod is fixed on the stripping plate; The ejector mechanism comprises a product ejector, a nozzle ejector, an ejector plate, a third elastic member and a guide rod; The ejector mechanism further includes an accelerating reset ejector, an ejector plate insert, and a second elastic member. A third slide groove is provided on the ejector plate. The ejector plate insert is vertically slidably installed in the third slide groove and has a third lowest position and a third highest position in the third slide groove. The second elastic member is vertically arranged and connects the ejector plate insert and the ejector plate. The water inlet ejector and the accelerating reset ejector are both fixedly connected to the ejector plate insert. The accelerating reset ejector passes through the rear template and extends to the interior of the rear template insert. The accelerating reset ejector and the pull rod are arranged in a colinear manner and abut against each other with the pull rod when the mold is closed. The accelerating reset ejector and the rear template and the rear template insert are all slidably connected. When the mold is closed, the pull rod passes through the front template insert and the lower end is inserted into the rear template insert, and the pull rod is slidably connected with the front template insert and the rear template insert respectively; The ejector plate is arranged at intervals below the rear template, the product ejector is fixedly connected to the ejector plate, the product ejector slides through the rear template and extends to the second cavity surface, the sprue ejector is connected to the ejector plate, the sprue ejector slides through the rear template and extends to the sprue bin, and the sprue ejector is slidably connected to the rear template and the rear template insert.

2. The thin-walled small window product in-mold automatic watertight cut injection mold according to claim 1, characterized in that: The insert ejection mechanism comprises a first elastic member, which is arranged in the rear template and connects the rear template insert and the rear template. When the stripping plate is molded with the front template, the first elastic member is in a compressed state.

3. The thin-walled small window product in-mold automatic watertight cut injection mold according to claim 1, characterized in that: The cross-sections of the front template insert and the rear template insert both correspond to the product viewing window, a first slide groove corresponding to the product viewing window is opened on the first cavity surface, and the front template insert is installed in the first slide groove, a second slide groove corresponding to the product viewing window is opened on the second cavity surface, and the rear template insert is installed in the second slide groove.

4. The thin-walled small window product in-mold automatic watertight cut injection mold according to claim 3, characterized in that: A first limit platform is arranged on the outer wall of the front template insert, and a first limit groove is opened on the wall surface of the first slide groove. The first limit platform can slide vertically in the first limit groove so as to have a first lowest position and a first highest position; a second limit platform is arranged on the outer wall of the rear template insert, and a second limit groove is opened on the wall surface of the second slide groove. The second limit platform can slide vertically in the second limit groove so as to have a second lowest position and a second highest position.

5. The thin-walled small window product in-mold automatic watertight cut injection mold according to claim 4, characterized in that: A locking position is provided at the lower end of the pull rod, and a ball screw for cooperating with the locking position is provided on the rear template insert.

6. The thin-walled small window product in-mold automatic watertight cut injection mold according to claim 5, characterized in that: One end of the guide rod is fixedly connected to the ejector plate and the other end is slidably connected to the rear template. The third elastic member connects the ejector plate and the rear template, and the third elastic member is used to keep the ejector plate away from the rear template.

7. The automatic in-mold watertight cut injection mold for thin-walled small window products according to any one of claims 1 to 6, characterized in that: The base also includes an upper fixed plate, a lower fixed plate and a plurality of vertical rods, the upper fixed plate is arranged above the stripping plate, and the plurality of vertical rods are fixedly connected to the upper fixed plate at intervals, the stripping plate, the front template and the rear template are all slidably connected to the vertical rods, the lower fixed plate is arranged below the rear template and fixedly connected to the rear template, the upper fixed plate is used to be connected to a fixed workbench of an injection molding machine, and the lower fixed plate is used to be connected to a movable workbench of the injection molding machine.

8. The thin-walled small window product in-mold automatic watertight cut injection mold according to claim 7, characterized in that: The front template is connected to the rear template via a damping member, and the damping member enables friction between the front template and the rear template.

9. The thin-walled small window product in-mold automatic watertight cut injection mold according to claim 7, characterized in that: A sprue hook is fixed on the upper fixed plate. The sprue hook penetrates the stripping plate and extends into the flow channel. The sprue hook is slidably connected to the stripping plate.

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