Long stroke slider demolding mechanism

Abstract

The application discloses a long-stroke slider demolding mechanism, which comprises a slider demolding assembly, which is provided with a guide rail piece, a large slider, a large slider shoveling machine, a small slider shoveling machine, a center slider and a slider insert piece. The first end of the center slider can be inserted into a small slider accommodating hole formed in the large slider, the end of the first end of the center slider is matched with the inclined surface of the large slider shoveling machine, the lower end position of the small slider shoveling machine is matched with the inclined surface of the center slider, the slider insert piece is fixed with one end of the large slider, the small slider is inserted into a small slider hole formed in the slider insert piece in the up-down direction, the small slider is limited in the front-rear direction by the small slider hole and can move relative to the slider insert piece in the up-down direction, and the lower end position of the small slider is matched with the inclined surface of the center slider.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mold, especially relates to a long-stroke slider demolding mechanism. BACKGROUND

[0002] When the injection molding product is injection molded, due to the structure itself, it needs to be made in a longitudinal core-pulling mold in a mold structure for transverse demolding, which is used to realize the formation of a reverse buckle recess structure in the injection molding product. Related injection molding products can be referred to as shown in Figure 1 and Figure 2 The injection molding product 6 is made of injection molding material through injection molding, which includes a body shell 60, one end of the body shell 60 forms an opening 61 along the transverse direction, and a reverse buckle recess 62 is formed on the inner wall of the body shell 61. When injection molding such injection molding product 6, the reverse buckle recess 62 needs to be demolded by designing a longitudinal core-pulling mold perpendicular to the transverse direction. The mold structure of the prior art is various, and most of them are complex and need a long demolding stroke, which is not conducive to the miniaturization of the overall mold.

[0003] Therefore, it is necessary to study a new demolding mechanism to solve the above problems. SUMMARY

[0004] The purpose of the present application is to solve the shortcomings in the prior art and propose a new long-stroke slider demolding mechanism.

[0005] In order to achieve the above purpose, the present application provides the following technical scheme:

[0006] A long-stroke slider demolding mechanism, comprising:

[0007] The upper mold assembly and the lower mold assembly can be opened and closed along the up-down direction, the slider demolding assembly is implanted between the upper mold assembly and the lower mold assembly, and the slider demolding assembly comprises:

[0008] The guide rail piece is fixed on the lower mold assembly and extends along the front-rear direction;

[0009] The large slider is slidably arranged on the guide rail piece, and the large slider can slide along the front-rear direction relative to the guide rail piece;

[0010] The large slider shovel can be arranged in the large slider shovel hole formed in the large slider along the up-down direction perpendicular to the front-rear direction, and the large slider shovel is straddled on the guide rail piece, and the large slider shovel can move along the up-down direction relative to the guide rail piece;

[0011] The small slider shovel can be arranged in the small slider shovel hole formed in the large slider along the up-down direction, and the small slider shovel can move along the up-down direction relative to the guide rail piece;

[0012] a center slide extending in the front-rear direction in an elongated shape, a first end of the center slide being capable of being inserted into a small slide accommodating hole formed in the large slide, an end of the first end of the center slide being engaged with the large slide shoveling slope, a lower end position of the small slide shoveling slope being engaged with the center slide slope;

[0013] a slide insert member being fitted around a second end of the center slide, the slide insert member being fixed to one end of the large slide;

[0014] a small slide being inserted into a small slide hole formed in the slide insert member in the up-down direction, the small slide being limited in the front-rear direction by the small slide hole and being capable of moving in the up-down direction relative to the slide insert member, a lower end position of the small slide being engaged with the center slide slope.

[0015] Further, an upper end of the large slide shoveling slope is fixed to the upper mold assembly, and an upper end of the small slide shoveling slope is fixed to the upper mold assembly;

[0016] a core-pulling rack being fixed to the upper mold assembly and being located on both sides of the large slide in a left-right direction perpendicular to the front-rear direction and the up-down direction, the core-pulling rack being engaged with the large slide slope and being mutually restricted in the front-rear direction, the core-pulling rack driving the large slide to move in the front-rear direction by moving in the up-down direction.

[0017] Further, inclined grooves are formed on both side surfaces of the large slide, and inclined ribs corresponding to the inclined grooves are formed on inner side surfaces of the core-pulling rack, the inclined ribs and the inclined grooves being engaged to form a slope engagement;

[0018] a time gap is formed between an outer surface of the inclined rib and an inner surface of the inclined groove in the front-rear direction.

[0019] Further, a plurality of the inclined grooves are formed and are adjacent to each other, and a plurality of the inclined ribs are formed and are adjacent to each other.

[0020] Further, a guide groove is recessed in an outer side surface of the core-pulling rack in the left-right direction, the guide groove extending in the up-down direction;

[0021] a rack guide block being fixed to the lower mold assembly, the rack guide block protruding to form a guide protrusion corresponding to being positioned in the guide groove.

[0022] Further, an inclined surface is formed on one end surface of the large slide shoveling slope in the front-rear direction, an end of the first end of the center slide forming a matching inclined surface, the inclined surface of the large slide shoveling slope and the matching inclined surface of the center slide forming a slope engagement;

[0023] When the large slider shovel moves downward along the up-down direction, the large slider shovel drives the center slider to move forward along the front-back direction;

[0024] When the large slider shovel moves upward along the up-down direction, the large slider shovel has no driving effect on the center slider.

[0025] Further, the lower end position of the small slider shovel is formed with an inclined protrusion, the center slider is formed with a matching inclined slot corresponding to the position of the inclined protrusion, and the inclined protrusion is formed with a slope matching the implanted limit in the matching inclined slot.

[0026] When the small slider shovel moves downward along the up-down direction, the small slider shovel drives the center slider to move forward along the front-back direction.

[0027] When the small slider shovel moves upward along the up-down direction, the small slider shovel drives the center slider to move backward along the front-back direction.

[0028] Further, the two sides of the guide rail corresponding to the position of the large slider shovel are formed with a limit slot, the large slider shovel is straddled on the guide rail and is formed with a straight section part corresponding to the limit slot and being limited in the limit slot along the front-back direction, and the limit slot limits the movement of the straight section part along the front-back direction relative to the guide rail.

[0029] Further, it further includes a slide rail containing slot recessed at the lower end position of the large slider along the up-down direction, the slide rail containing slot extends along the front-back direction, and at least part of the guide rail is implanted in the slide rail containing slot to realize that the large slider sliding group is arranged on the guide rail.

[0030] Further, it includes a limit side plate locked on the lower mold assembly by a nut and abutting against the two sides of the guide rail, and the limit side plate is located below the large slider along the up-down direction.

[0031] The side position of the limit side plate close to the guide rail is formed with a limit slot part along the up-down direction, the large slider shovel is straddled on the guide rail and is formed with a lower end limit foot corresponding to the limit slot part and being limited in the limit slot part along the front-back direction.

[0032] A stop part is locked on the lower mold assembly by a nut and is located below the guide rail, the lower edge of the guide rail along the up-down direction is formed with a notch part straddling on the stop part, and the stop part limits the guide rail along the front-back direction.

[0033] When the large slider shovel moves downward along the up-down direction to the limit position, the large slider shovel is stopped downward on the stop part.

[0034] Furthermore, a limiting block is fixedly provided below the central slider, and a limiting groove for accommodating the limiting block is formed at the corresponding position of the large slider, and the limiting groove is open forward.

[0035] An adapter is fitted around one end of the slider insert, and the slider insert is locked to one end of the large slider through the adapter;

[0036] The end face of the adapter near the large slider blocks the forward opening of the limiting groove, thereby limiting the limiting block in the limiting groove in the front-back direction;

[0037] The limiting block can slide within the limiting groove in the front-back direction.

[0038] Compared with the prior art, the beneficial effects of this application are: it can stably achieve the purpose of core pulling mold demolding, and the demolding mechanism is conducive to miniaturization design and has a short demolding stroke. Attached Figure Description

[0039] Figure 1 This is a schematic perspective view of an injection-molded product structure exemplified in this application.

[0040] Figure 2 yes Figure 1 A cross-sectional view of a medium-sized injection molded product.

[0041] Figure 3 This is a three-dimensional schematic diagram of the long-stroke slider demolding mechanism of this application.

[0042] Figure 4 yes Figure 3 The diagram shows a three-dimensional view of the long-stroke slider demolding mechanism after the upper and lower mold base components have been removed, further illustrating the three-dimensional exploded view of the upper mold component after separation.

[0043] Figure 5 yes Figure 4 The diagram shows a further exploded perspective view of the long-stroke slider demolding mechanism after removing the upper mold base assembly and the lower mold base assembly. Specifically, it shows a perspective view of the upper mold assembly, the lower mold assembly, and the slider demolding assembly after separation.

[0044] Figure 6 This is a top view of the long-stroke slider demolding mechanism after removing the upper mold base assembly and the lower mold base assembly in this application.

[0045] Figure 7 It is self Figure 6 The cross-sectional view along line AA shows the state diagram after the upper and lower mold components are joined together.

[0046] Figure 8 yes Figure 7 Enlarged view of the structure within the dashed box.

[0047] Figure 9 is a perspective view of a slider demolding assembly of the long stroke slider demolding mechanism of the present application.

[0048] Figure 10 is a perspective view of the slider demolding assembly shown in Figure 9 , wherein Figure 10 the viewing angle is the same as Figure 9 .

[0049] Figure 11 is a perspective view of the slider demolding assembly shown in Figure 9 , wherein Figure 11 the viewing angle is different from Figure 9 .

[0050] Figure 12 is a further perspective view of the slider demolding assembly shown in Figure 11 , wherein Figure 12 the viewing angle is the same as Figure 11 .

[0051] Figure 13 is a top view of the slider demolding assembly shown in Figure 9 .

[0052] Figure 14 is a sectional view from line B-B in Figure 13 .

[0053] Figure 15 is a sectional view from line C-C in Figure 13 .

[0054] Figure 16 is a sectional view from line D-D in Figure 13 .

[0055] Figure 17 is an enlarged view of the structure within the dashed box in Figure 16 .

[0056] Figure 18 is another embodiment of the present application, specifically an alternative embodiment of the structure shown in Figure 17 .DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work, fall within the scope of protection of the present application.

[0058] For the purpose of the description herein, all references to direction shall be taken in the Figure 5 direction, wherein the positive direction of the X-axis is the rear direction; the direction in which the Y-axis lies is defined as the up-down direction, wherein the positive direction of the Y-axis is the up direction; and the direction in which the Z-axis lies is defined as the left-right direction.

[0059] Please refer to Figures 3 to 16 Fig. 1, which shows a long-stroke core-pulling slider mechanism disclosed by the present application. The long-stroke core-pulling slider mechanism comprises an upper mold foot assembly 101, an upper mold assembly 1, a lower mold assembly 2, a lower mold foot assembly 102, and a slider demolding assembly 3. The upper mold foot assembly 101, the upper mold assembly 1, the lower mold assembly 2, and the lower mold foot assembly 102 are arranged in a stacked manner along the up-down direction. The upper mold assembly 1 and the lower mold assembly 2 are capable of being opened and closed along the up-down direction. The slider demolding assembly 3 is implanted between the upper mold assembly 1 and the lower mold assembly 2. The upper mold assembly 1 and the lower mold assembly 2 are jointly stacked to form an injection molding cavity (not numbered, which is actually the cavity region of the injection molding product 6 in Fig. 1). Figure 7 Part of the slider demolding assembly 3 is used to jointly form the injection molding cavity.

[0060] Further, the slide demolding assembly 3 comprises a guide rail 31, a large slide 32, a large slide shifter 33, a small slide shifter 34, a center slide 35, a slide insert 36, a small slide 37, and a core pulling rack 38. The guide rail 31 is fixed on the upper die assembly 1 and extends in the front-rear direction. The large slide 32 is slidingly arranged on the guide rail 31. Specifically, the lower end of the large slide 32 is recessed to form a slide rail accommodating groove 325 extending in the front-rear direction, and at least part of the guide rail 31 is implanted in the slide rail accommodating groove 325 to achieve the sliding arrangement of the large slide 32 on the guide rail 31. The large slide 32 can slide relative to the guide rail 31 in the front-rear direction. The large slide shifter 33 is arranged in a large slide shifter hole 321 formed in the large slide 32 in the up-down direction perpendicular to the front-rear direction. The large slide shifter 33 straddles the guide rail 31, and the large slide shifter 33 can move relative to the guide rail 31 in the up-down direction. The small slide shifter 34 is arranged in a small slide shifter hole 322 formed in the large slide 32 in the up-down direction. The small slide shifter 34 can move relative to the guide rail 31 in the up-down direction. The center slide 35 extends in the front-rear direction in the shape of a long strip. The first end of the center slide 35 is inserted into a small slide accommodating hole 323 formed in the large slide 32. The end of the first end of the center slide 35 cooperates with the inclined surface of the large slide shifter 33. The slide insert 36 is sleeved on the periphery of the second end of the center slide 35, and the slide insert 36 is fixed to one end of the large slide 32. The small slide 37 is arranged in a small slide hole 361 formed in the slide insert 36 in the up-down direction. The small slide 37 is limited in the front-rear direction by the small slide hole 361 and can move relative to the slide insert 36 in the up-down direction. The upper end of the small slide 37 is exposed to the slide insert 36. The lower end of the small slide 37 cooperates with the inclined surface of the center slide 35. The lower end of the small slide shifter 34 cooperates with the inclined surface of the center slide 35.

[0061] Please refer to Figure 7 , Figure 8 and Figure 12As shown, the lower part of the center slider 35 is also fixed with a limiting block 39, and the large slider 32 is formed with a limiting groove 326 for accommodating the limiting block 39. The limiting groove 326 is open forward. The slider demolding assembly 3 further comprises an adapter 30. The adapter 30 is sleeved on the periphery of one end of the slider insert 36. The slider insert 36 is locked on one end of the large slider 32 through the adapter 30. The adapter 30 blocks the opening of the limiting groove 326 forward, so as to limit the limiting block 39 in the limiting groove 326 in the front-rear direction. The limiting block 39 can slide in the limiting groove 326 in the front-rear direction. In this way, the center slider 35 can slide in a certain range (that is, the extension length range of the limiting groove 326 in the front-rear direction) relative to the large slider 32 in the front-rear direction.

[0062] Please refer to Figures 3 to 9 As shown, the upper end of the large slider shoveler 33 is fixed with the upper mold assembly 1. The upper end of the small slider shoveler 34 is fixed with the upper mold assembly 1. The core-pulling rack 38 extends in the up-down direction and has a quadrilateral cross section. The upper end position of the core-pulling rack 38 is fixed on the upper mold assembly 1 by bolts. In the left-right direction perpendicular to the front-rear direction and the up-down direction, the core-pulling rack 38 is located on both sides of the large slider 32. The core-pulling rack 38 is inclinedly matched with the large slider 32. The core-pulling rack 38 drives the large slider 32 to move in the front-rear direction by moving in the up-down direction.

[0063] Please refer to Figures 5 to 14 As shown, specifically, in the preferred embodiment, the two side surfaces of the large slider 32 are formed with inclined grooves 324. The corresponding inner side surfaces of the core-pulling rack 38 are formed with inclined ribs 381 matched with the inclined grooves 324. The inclined ribs 381 are engaged with the inclined grooves 324 to form an inclined matching surface. Further, the front-rear direction forms an extension gap 380 (see Figure 14 That is, the width of the inclined groove 324 is greater than the width of the inclined rib 381. In the preferred embodiment, the inclined grooves 324 are provided in plurality and are adjacent in interval. The inclined ribs 381 are provided in plurality and are adjacent in interval. When the upper mold assembly 1 and the lower mold assembly 2 are opened and closed, the up-down movement of the core-pulling rack 38 relative to the lower mold assembly 2 can drive the large slider 32 to move in the front-rear direction. The setting of the extension gap 380 can make the movement of the core-pulling rack 38 driving the large slider 32 lag for a certain time (preset time) as required.

[0064] Please refer to Figures 9 to 12As shown, the core-pulling rack 38 is recessed with a guide groove 382 on the outer side in the left-right direction. The guide groove 382 extends in the up-down direction. The slide demolding assembly 3 further comprises a rack guide block 383. The rack guide block 383 is fixed on the lower mold assembly 2 by bolts. The rack guide block 383 is protruded with a guide protrusion 3831 corresponding to the guide groove 382. By matching the guide groove 382 on the core-pulling rack 38 with the rack guide block 383, the movement track of the core-pulling rack 38 in the up-down direction can be controlled and accurate.

[0065] Please refer to Figures 5 to 15 As shown, the large slide shovel 33 is formed with an inclined surface (not numbered) on one end surface in the front-rear direction. The end of the first end of the center slide 35 is formed with a matching inclined surface (not numbered). The inclined surface of the large slide shovel 33 and the matching inclined surface of the center slide 35 form a bevel matching. In this way, when the large slide shovel 33 moves downward in the up-down direction, the large slide shovel 33 drives the center slide 35 to move forward in the front-rear direction; when the large slide shovel 33 moves upward in the up-down direction, the large slide shovel 33 has no driving effect on the center slide 35. In addition, the lower end position of the small slide shovel 34 is formed with an inclined protrusion 341, and the center slide 35 is formed with a matching inclined groove 351 corresponding to the position of the inclined protrusion 341 (the matching inclined groove 351 can be a through hole in the up-down direction, or a notch recessed inward from one side of the center slide 35, and the embodiment shown in the drawings of the present application is a notch-shaped matching inclined groove 351). The inclined protrusion 341 corresponds to the implantation limit in the matching inclined groove 351 to form a bevel matching. When the small slide shovel 34 moves downward in the up-down direction, the small slide shovel 34 drives the center slide 35 to move forward in the front-rear direction. When the small slide shovel 34 moves upward in the up-down direction, the small slide shovel 34 drives the center slide 35 to move backward in the front-rear direction.

[0066] Please refer to Figure 11 and Figures 9 to 14As shown, the guide rail 31 is formed with a limiting groove 311 on both sides corresponding to the position of the large slider shovel 33. The large slider shovel 33 straddles the guide rail 31 and is formed with a lower end limiting foot 331 which is correspondingly limited in the limiting groove 311 along the front-rear direction, and the lower end limiting foot 331 comprises a straight section 3311 which is below the inclined surface matched with the end inclined surface of the first end of the center slider 35. The large slider shovel 33 can move along the up-down direction relative to the guide rail 31. The large slider shovel 33 cannot move along the front-rear direction and the left-right direction relative to the guide rail 31. When the straight section 3311 is inserted into the limiting groove 311 by moving downward, the large slider shovel 33 stops moving forward.

[0067] Please refer to Figures 9 to 12 As shown, the slider demolding assembly 3 of the present application further comprises a limiting side plate 4 which is locked on the lower mold assembly 2 by a nut and abuts against both sides of the guide rail 31, and the limiting side plate 4 is below the large slider 32 along the up-down direction. The side of the limiting side plate 4 close to the guide rail 31 is formed with a limiting groove 41 along the up-down direction, and the large slider shovel 33 straddles the guide rail 31 and is formed with a lower end limiting foot 331 which is correspondingly limited in the limiting groove 41 along the front-rear direction. The limiting groove 41 has the same structure and function as the limiting groove 311 described above. In the drawings of the present application, the limiting groove 41 and the lower end limiting foot 331 are shown as not being tightly matched along the front-rear direction, and the drawing is only illustrative. In the implementation of the mold structure, in order to realize the limiting of the lower end limiting foot 331 along the front-rear direction by the limiting groove 41, the limiting groove 41 and the lower end limiting foot 331 can be designed to be tightly matched.

[0068] The slider demolding assembly 3 of the present application further comprises a stopper 5 which is locked on the lower mold assembly 2 and below the guide rail 31, and the lower edge of the guide rail 31 along the up-down direction is formed with a notch 312 straddling the stopper 5, and the stopper 5 limits the guide rail 31 along the front-rear direction. When the large slider shovel 33 moves downward to the limit position along the up-down direction, the large slider shovel 33 stops downwardly on the stopper 5.

[0069] Please refer to Figures 16 to 18 、 Figure 18 As shown, the slide rail accommodating groove 325 is recessed on the lower surface of the large slider 32 along the up-down direction. The slide rail accommodating groove 325 extends along the front-rear direction. At least part of the guide rail 31 is implanted in the slide rail accommodating groove 325, so as to realize that the large slider 32 is slidingly arranged on the guide rail 31. In one embodiment, Figure 18In the embodiment shown, the slide rail accommodating groove 325 is formed with one first inner groove surface 3251 parallel to the front-rear direction, two second inner groove surfaces 3252 parallel to the front-rear direction, and two third inner groove surfaces 3253 parallel to the front-rear direction. The two third inner groove surfaces 3253 are parallel to each other. The portion of the rail member 31 implanted in the slide rail accommodating groove 325 is formed with one first rail surface 301 matching and abutting against the first inner groove surface 3251, two second rail surfaces 302 matching and abutting against the second inner groove surfaces 3252, and two third rail surfaces 303 matching and abutting against the third inner groove surfaces 3253, wherein any two of the first inner groove surface 3251, any one of the second inner groove surfaces 3252, and any one of the third inner groove surfaces 3253 are not parallel to each other and do not overlap.

[0070] In this application, a horizontal plane (not shown, actually a virtual plane) perpendicular to the up-down direction is defined. Preferably, the first inner groove surface 3251 is parallel to the horizontal plane. Preferably, the second inner groove surface 3252 intersects the horizontal plane. Preferably, the third inner groove surface 3253 is perpendicular to the horizontal plane. In this embodiment, Figure 17 In the embodiment shown, the slide rail accommodating groove 325 sequentially includes a first slide rail groove section (not numbered) and a second slide rail groove section (not numbered) from top to bottom. In a cross section perpendicular to the front-rear direction, the cross section of the first slide rail groove section is formed to have a linear decrease in width from top to bottom in all directions (for example, an inverted isosceles trapezoid). In a cross section perpendicular to the front-rear direction, the cross section of the second slide rail groove section is formed to have an equal width from top to bottom in all directions (for example, a rectangle). The slide rail accommodating groove 325 and the rail member 31 designed by this application can ensure a small friction force when starting (when the mold is opened or closed) and ensure the positioning accuracy between the two, thereby ensuring that the long-stroke slide block (here, the large slide block 32) is not easily stuck when the mold is closed or opened.

[0071] Please refer to Figure 18 , for Figure 17 alternative embodiments of the embodiment shown, ​In the shown embodiment, the first inner groove surface 3251 has a fourth inner groove surface 3254 extending downwardly on both sides thereof. The lower edge of the fourth inner groove surface 3254 is connected with the second inner groove surface 3252. The two second inner groove surfaces 3252 extend downwardly and oppositely. The fourth inner groove surface 3254 is perpendicular to the horizontal plane. The lower edge of each second inner groove surface 3252 further extends downwardly to form a third inner groove surface 3253, which is perpendicular to the horizontal plane. The slide rail accommodating groove 325 comprises, from top to bottom, a third slide rail groove section (not numbered), a first slide rail groove section (not numbered) and a second slide rail groove section (not numbered) which are connected with each other. In a cross section perpendicular to the front-rear direction, the cross section of the third slide rail groove section is formed to have a width which is equal in all directions from top to bottom. In a cross section perpendicular to the front-rear direction, the cross section of the first slide rail groove section is formed to have a width which decreases linearly from top to bottom in all directions. In a cross section perpendicular to the front-rear direction, the cross section of the second slide rail groove section is formed to have a width which is equal in all directions from top to bottom. This can ensure a small friction force during starting (during mold closing and mold opening) and ensure the positioning accuracy between the two, and also can ensure that the long stroke slider (here, the large slider 32) is not easy to be stuck during mold closing and mold opening.

[0072] The actuation process of the long stroke core-pulling slider mechanism of the present application will be described in detail below with reference to the drawings:

[0073] During mold closing:

[0074] First step: the upper mold assembly 1 drives the large slider shoveling mechanism 33, the small slider shoveling mechanism and the core-pulling rack 38 to move downwardly synchronously; the core-pulling rack 38 drives the large slider 32, the center slider 35, the slider insert 36 and the small slider 37 to move forwardly in the front-rear direction. In this process, the large slider shoveling mechanism 33 and the small slider shoveling mechanism have not been inserted into the position for driving the center slider 35.

[0075] Second step: the upper die assembly 1 drives the large slider shovel 33, the small slider shovel and the core-pulling rack 38 to further move downward until the inclined protruding column 341 of the small slider shovel 34 is inserted into the matching inclined slot 351, the downward movement of the small slider shovel 34 drives the center slider 35 to move forward, in this process, the large slider shovel 33 moves downward synchronously with the small slider shovel 34 and limits the forward movement of the large slider 32 (mainly through the straight section 3311 and the vertical end wall at the rear end of the large slider shovel 33), the slider insert 36 is fixed with the large slider 32, so the forward movement of the center slider 35 is relative to the forward movement of the slider insert 36 and the large slider 32, the front end of the center slider 35 pushes up the small slider 37, and the upper end of the small slider 37 is pushed up to the small slider hole 361 on the slider insert 36. In this process, since the large slider 32 is stationary along the front and rear directions due to the limitation of the large slider shovel 33, the core-pulling rack 38 moves downward synchronously with the large slider shovel 33 and the small slider shovel 34, at this time, the above-mentioned time delay gap 380 plays a role in absorbing the relative movement until the mold is closed in place.

[0076] When the mold is opened:

[0077] First step: the small slider shovel 34, the large slider shovel 33 and the core-pulling rack 38 move upward together with the upper die assembly 1, the inclined protruding column 341 of the small slider shovel 34 matches the matching inclined slot 351 to drive the upward movement of the small slider shovel 34 to drive the rearward movement of the center slider 35, and then synchronously drive the downward movement of the small slider 37. In this process, since the straight section 3311 and the vertical end wall at the rear end of the large slider shovel 33, the large slider 32 is stationary along the front and rear directions while the large slider shovel 33 moves upward at the initial stage of the mold, in addition, the slider insert is also stationary along the front and rear directions synchronously with the large slider 32. The above-mentioned time delay gap 380 is used to absorb the upward movement of the core-pulling rack 38.

[0078] Second step: the small slider shovel 34, the large slider shovel 33 and the core-pulling rack 38 move upward together with the upper die assembly 1 until the small slider shovel 34 and the small slider accommodating 323 of the center slider 35 are disengaged; at this time, the large slider shovel 33 also disengages the brake of the large slider 32, the small slider 37 also moves downward to the limit position and disengages from the injection molded product 6; after the core-pulling rack 38 absorbs the time delay gap 380, the inclined protruding rib 381 corresponds to the inner surface of the inclined recess 324 and abuts against, the further upward movement of the core-pulling rack 38 drives the rearward movement of the large slider 32, at this time, the slider insert 36, the center slider 35 and the small slider 37 move rearward synchronously with the large slider 32, until the mold is completely opened.

[0079] The long-stroke core-pulling slider mechanism designed by the application can stably and effectively realize the demolding action of the undercut recess 62 in the injection molding product 6, and ingeniously link the front and rear direction demolding action of the center slider 35 and the large slider 32 to the mold opening action of the core-pulling rack 38 in the up and down direction, so as to avoid excessive demolding stroke in the front and rear direction, and realize the miniaturization design of the long-stroke core-pulling slider mechanism.

[0080] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A long stroke slide demolding mechanism comprising an upper mold assembly (1), a lower mold assembly (2) and a slide demolding assembly (3), the upper mold assembly (1) and the lower mold assembly (2) being openable and closable in an up-and-down direction, the slide demolding assembly (3) being implanted between the upper mold assembly (1) and the lower mold assembly (2), characterized in that, The slide demolding assembly (3) comprises: a guide rail (31) fixed to the lower mold assembly (2) and extending in the front-rear direction; a large slide (32) slidingly arranged on the guide rail (31), the large slide (32) being capable of sliding in the front-rear direction relative to the guide rail (31); a large slide shovel (33) capable of penetrating into a large slide shovel hole (321) formed on the large slide (32) in the up-down direction perpendicular to the front-rear direction, the large slide shovel (33) straddling the guide rail (31), the large slide shovel (33) being capable of moving in the up-down direction relative to the guide rail (31); a small slide shovel (34) capable of penetrating into a small slide shovel hole (322) formed on the large slide (32) in the up-down direction, the small slide shovel (34) being capable of moving in the up-down direction relative to the guide rail (31); a center slide (35) extending in the form of an elongated strip in the front-rear direction, a first end of the center slide (35) being capable of penetrating into a small slide accommodating hole (323) formed on the large slide (32), an end of the first end of the center slide (35) being in engagement with a slope of the large slide shovel (33), a lower end position of the small slide shovel (34) being in engagement with a slope of the center slide (35); a slide insert (36) sleeved on an outer periphery of a second end of the center slide (35), the slide insert (36) being fixed to one end of the large slide (32); a small slide (37) penetrating into a small slide hole (361) formed on the slide insert (36) in the up-down direction, the small slide (37) being limited in the front-rear direction by the small slide hole (361) and being capable of moving in the up-down direction relative to the slide insert (36), a lower end position of the small slide (37) being in engagement with a slope of the center slide (35); a lower end position of the small slide shovel (34) is formed with an inclined protrusion (341), the center slide (35) is formed with a matching inclined groove (351) corresponding to the position of the inclined protrusion (341), the inclined protrusion (341) is implanted and limited in the matching inclined groove (351) to form a slope engagement; when the small slide shovel (34) moves downward in the up-down direction, the small slide shovel (34) drives the center slide (35) to move forward in the front-rear direction; when the small slide shovel (34) moves upward in the up-down direction, the small slide shovel (34) drives the center slide (35) to move backward in the front-rear direction.

2. The long-stroke slide demolding mechanism according to claim 1, wherein: an upper end of the large slide shovel (33) is fixed to the upper mold assembly (1), and an upper end of the small slide shovel (34) is fixed to the upper mold assembly (1). A core-pulling rack (38) is fixed to the upper die assembly (1) and located on both sides of the large slider (32) along the left-right direction perpendicular to the front-rear direction and the up-down direction. The core-pulling rack (38) is in inclined surface cooperation with the large slider (32) and is restricted in the front-rear direction. The core-pulling rack (38) drives the large slider (32) to move in the front-rear direction by moving in the up-down direction.

3. The long-stroke slider demolding mechanism according to claim 2, characterized in that: Inclined grooves (324) are formed on the two side surfaces of the large slider (32), and inclined ribs (381) corresponding to the inclined grooves (324) are formed on the inner side surfaces of the core-pulling rack (38). The inclined ribs (381) and the inclined grooves (324) are in meshing inclined surface cooperation. A time gap (380) is formed between the outer surface of the inclined rib (381) and the inner surface of the inclined groove (324) along the front-rear direction.

4. The long-stroke slider demolding mechanism according to claim 3, characterized in that: The inclined grooves (324) are provided in multiple and are adjacent in intervals, and the inclined ribs (381) are provided in multiple and are adjacent in intervals.

5. The long-stroke slider demolding mechanism according to claim 2 or 3 or 4, characterized in that: The outer side surface of the core-pulling rack (38) along the left-right direction is recessed to form a guide groove (382) extending along the up-down direction. A rack guide block (383) is fixed to the lower die assembly (2), and the rack guide block (383) protrudes to form a guide protrusion (3831) corresponding to the guide groove (382).

6. The long-stroke slider demolding mechanism according to claim 1, characterized in that: An inclined surface is formed on one end surface of the large slider (33) along the front-rear direction, and an inclined surface corresponding to the inclined surface is formed on the end of the first end of the center slider (35). The inclined surface of the large slider (33) and the inclined surface corresponding to the center slider (35) are in inclined surface cooperation. When the large slider (33) moves downward along the up-down direction, the large slider (33) drives the center slider (35) to move forward along the front-rear direction. When the large slider (33) moves upward along the up-down direction, the large slider (33) has no driving effect on the center slider (35).

7. The long-stroke slider demolding mechanism according to claim 1 or 2 or 3 or 4 or 6, characterized in that: A restriction groove (311) is formed on both sides of the corresponding large slider (33) position of the guide rail (31), and the large slider (33) straddles the guide rail (31) and is formed with a straight section (3311) corresponding to the restriction groove (311) and located in the restriction groove (311) along the front-rear direction. The restriction groove (311) restricts the movement of the straight section (3311) along the front-rear direction relative to the guide rail (31).

8. The long-stroke slider demolding mechanism according to claim 1 or 2 or 3 or 4 or 6, characterized in that, Further comprising: A slide rail accommodating groove (325) is recessed at a lower end position of the large slider (32) in the up-down direction, extends in the front-rear direction, and has at least a portion of the guide rail member (31) implanted therein to enable the large slider (32) to slide on the guide rail member (31).

9. The long-stroke slider demolding mechanism according to claim 8, wherein Also included are: A limiting side plate (4) is secured to the lower mold assembly (2) by a nut and abuts both sides of the guide rail member (31), and is located below the large slider (32) in the up-down direction; A limiting slot portion (41) is formed through the position of the side of the limiting side plate (4) close to the guide rail member (31) in the up-down direction, and the large slider shovels (33) straddle the guide rail member (31) and have lower end limiting feet (331) formed therein that are correspondingly limited in the limiting slot portion (41) in the front-rear direction; A stop member (5) is secured to the lower mold assembly (2) by a nut and is located below the guide rail member (31), and a notch portion (312) is formed in the lower edge of the guide rail member (31) in the up-down direction to straddle the stop member (5), and the stop member (5) limits the guide rail member (31) in the front-rear direction; When the large slider shovels (33) move downward to the limit position in the up-down direction, the large slider shovels (33) are stopped downward by the stop member (5).

10. The long-stroke slider demolding mechanism according to claim 8, wherein: A limiting block (39) is further secured below the center slider (35), and a limiting slot (326) that accommodates the limiting block (39) is formed in a corresponding position of the large slider (32), and the limiting slot (326) is open forward; An adapter (30) is sleeved around one end of the slider insert member (36), and the slider insert member (36) is secured to one end of the large slider (32) by the adapter (30); The adapter (30) blocks the opening of the limiting slot (326) forward, and thereby limits the limiting block (39) in the limiting slot (326) in the front-rear direction; The limiting block (39) can slide in the limiting slot (326) in the front-rear direction.

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