Long-stroke sliding block demolding mechanism

Abstract

The invention discloses a long-stroke sliding block demolding mechanism which comprises a sliding block demolding assembly. The large sliding block is assembled on the guide rail piece in a sliding manner; the large sliding block shoveling machine is arranged on the guide rail piece in a bestriding mode and can move relative to the guide rail piece in the vertical direction; the small sliding block shoveling machine can move relative to the guide rail piece in the vertical direction; the first end of the central sliding block can be inserted into a small sliding block accommodating part formed on the large sliding block in a penetrating manner, the end part of the first end of the central sliding block is matched with the inclined surface of the large sliding block shoveling machine, and the lower end of the small sliding block shoveling machine is matched with the inclined surface of the central sliding block; the sliding block insert is fixed with one end of the large sliding block; the small sliding block is arranged in a small sliding block hole formed in the sliding block insert in a penetrating mode in the vertical direction, the small sliding block is limited by the small sliding block hole in the front-back direction and can move relative to the sliding block insert in the vertical direction, and the lower end position of the small sliding block is matched with the inclined face of the center sliding block.

Description

Technical Field

[0001] The present application relates to the field of molds, and in particular to a long-stroke slider demoulding mechanism. Background Art

[0002] During the injection molding of injection molded products, due to the structural determination of the products themselves, a longitudinal core-pulling mold needs to be made in the mold structure with lateral demoulding to form an undercut recessed structure in the injection molded product. Figure 1 and Figure 2 As shown, an injection molded product 6 is schematically disclosed, which is made of injection molding material through injection molding, including a body shell 60, wherein an opening 61 is formed at one end of the body shell 60 along the transverse direction, and an undercut recess 62 is formed on the inner wall of the body shell 61. When such an injection molded product 6 is injection molded, the undercut recess 62 needs to be demolded by designing a longitudinal core-pulling mold perpendicular to the transverse direction. In the prior art, there are various mold designs for such structures, most of which are complex in structure and require a long demolding work stroke, which is not conducive to the miniaturization of the overall mold.

[0003] Therefore, it is necessary to study a new demoulding mechanism to solve the above problems. Summary of the invention

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

[0005] To achieve the above objectives, this application provides the following technical solutions:

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

[0007] It includes an upper mold assembly, a lower mold assembly and a slider demoulding assembly. The upper mold assembly and the lower mold assembly can be opened and closed in the up and down directions. The slider demoulding assembly is implanted between the upper mold assembly and the lower mold assembly. The slider demoulding assembly includes:

[0008] A guide rail member, fixed to the lower mold assembly and extending in the front-rear direction;

[0009] A large slider, the sliding group is arranged on the guide rail member, and the large slider can slide relative to the guide rail member in the front-back direction;

[0010] A large slider shovel can be inserted into a large slider shovel hole formed on the large slider along an up-down direction perpendicular to the front-rear direction, the large slider shovel straddles the guide rail member, and the large slider shovel can move relative to the guide rail member along the up-down direction;

[0011] A small slider scraper can be inserted into a small slider scraper hole formed on the large slider along the up-down direction, and the small slider scraper can move relative to the guide rail member along the up-down direction;

[0012] A central slider extends in a long strip shape along the front-rear direction, and the first end of the central slider can be inserted into the small slider formed on the large slider, the end of the first end of the central slider cooperates with the inclined surface of the large slider, and the lower end position of the small slider cooperates with the inclined surface of the central slider;

[0013] A slider insert is sleeved on the periphery of the second end of the central slider, and the slider insert is fixed to one end of the large slider;

[0014] The small slider is inserted into the small slider hole formed on the slider insert along the up-down direction. The small slider is limited by the small slider hole along the front-back direction and can move relative to the slider insert along the up-down direction. The lower end position of the small slider cooperates with the inclined surface of the center slider.

[0015] Furthermore, the upper end of the large slider shovel is fixed to the upper mold assembly, and the upper end of the small slider shovel is fixed to the upper mold assembly;

[0016] The core pulling rack is fixed on the upper mold assembly and is located on both sides of the large slider along the left and right directions perpendicular to the front-to-back direction and the up-down direction. The core pulling rack cooperates with the inclined surface of the large slider and restricts each other along the front-to-back direction. The core pulling rack moves along the up-down direction to drive the large slider to move along the front-to-back direction.

[0017] Furthermore, inclined grooves are formed on both side surfaces of the large slider, and inclined ribs matching with the inclined grooves are formed on the corresponding inner side surfaces of the core-pulling rack, and the inclined ribs mesh with the inclined grooves to form an inclined surface match;

[0018] A time-delay gap is formed between the outer surface of the inclined convex rib and the inner surface of the inclined groove along the front-to-back direction.

[0019] Furthermore, the inclined grooves are provided in plurality and are adjacent to each other at intervals, and the inclined ribs are provided in plurality and are adjacent to each other at intervals.

[0020] Furthermore, the outer side surface of the core-pulling rack along the left-right direction is recessed to form a guide groove, and the guide groove extends along the up-down direction;

[0021] The rack guide block is fixed on the lower mold assembly, and the rack guide block is quickly protruded to form a corresponding guide protrusion limited in the guide groove.

[0022] Furthermore, an end face of the large slider shovel along the front-rear direction forms an inclined surface, and the end of the first end of the central slider forms a matching inclined surface, and the inclined surface of the large slider shovel and the matching inclined surface of the central slider form an inclined surface match;

[0023] When the large slider shovel moves downward in the up-down direction, the large slider shovel drives the central slider to move forward in 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 central slider.

[0025] Furthermore, an inclined boss is formed at the lower end of the small slider shovel, and a matching inclined groove is formed at the position of the central slider corresponding to the inclined boss, and the inclined boss is corresponding to the implant limit in the matching inclined groove to form an inclined surface match;

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

[0028] Furthermore, limiting grooves are formed on both sides of the guide rail member corresponding to the position of the large slider shovel. The large slider shovel straddles the guide rail member and is formed with a straight section that is correspondingly limited in the limiting groove along the front-to-back direction. The limiting groove limits the movement of the straight section relative to the guide rail member along the front-to-back direction.

[0029] Furthermore, it also includes: a slide rail receiving groove, which is recessed at the lower end position of the large slider along the up and down direction, and the slide rail receiving groove extends along the front and back direction. At least part of the guide rail member is implanted in the slide rail receiving groove to realize the large slider sliding assembly on the guide rail member.

[0030] Further, it includes: a limiting side plate, which is locked on the lower mold assembly through nuts and abuts against two sides of the guide rail member, and the limiting side plate is located below the large slider along the up-down direction;

[0031] The limiting side plate is formed with a limiting groove portion penetrating along the up-down direction at a side position close to the guide rail member, and the large slider shovel straddles the guide rail member and is formed with a lower limiting foot correspondingly limited in the limiting groove portion along the front-back direction;

[0032] A stopper, which is locked on the lower mold assembly by a nut and is located below the guide rail member, wherein the lower edge of the guide rail member along the up-down direction forms a notch portion straddling the stopper, and the stopper limits the guide rail member along the front-back direction;

[0033] When the large slider shovel moves downward along the up-down direction to a limit position, the large slider shovel stops downward at the stop member.

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

[0035] An adapter, sleeved on the periphery of 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 surface of the adapter close to the large slider blocks the forward opening of the limiting groove, thereby limiting the position of the limit block in the limiting groove along the front-rear direction;

[0037] The limiting block can slide in the limiting groove along the front-rear direction.

[0038] Compared with the prior art, the beneficial effects of the present application are: the purpose of demoulding the core-pulling mold can be stably achieved, the demoulding mechanism is conducive to miniaturized design, and the demoulding working stroke is short. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic three-dimensional diagram of the structure of an injection molded product exemplified in this application.

[0040] Figure 2 yes Figure 1 Cross-sectional view of an injection molded product.

[0041] Figure 3 It is a three-dimensional schematic diagram of the long-stroke slider demoulding mechanism of the present application.

[0042] Figure 4 yes Figure 3 The three-dimensional schematic diagram of the long-stroke slider demolding mechanism after removing the upper mold foot assembly and the lower mold foot assembly is shown in the figure, which further shows the three-dimensional decomposition schematic diagram after the upper mold assembly is separated.

[0043] Figure 5 yes Figure 4 The figure shows a further three-dimensional decomposition diagram of the long-stroke slider demoulding mechanism after removing the upper mold foot assembly and the lower mold foot assembly, which specifically shows a three-dimensional schematic diagram after the upper mold assembly, the lower mold assembly and the slider demoulding assembly are separated.

[0044] Figure 6 It is a top view of the long-stroke slider demoulding mechanism of the present application after the upper mold foot assembly and the lower mold foot assembly are removed.

[0045] Figure 7 It is Figure 6 The cross-sectional view along line AA shows the state of the upper mold assembly and the lower mold assembly after the mold is closed.

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

[0047] Fig. 9 It is a three-dimensional schematic diagram of the slider demoulding component of the long-stroke slider demoulding mechanism of the present application.

[0048] Fig.10 yes Fig. 9 A partial exploded perspective view of the slider demoulding assembly shown in FIG. Fig.10 Angle of view and Fig. 9 same.

[0049] Fig.11 yes Fig. 9 A partial exploded perspective view of the slider demoulding assembly shown in FIG. Fig.11 Angle of view and Fig. 9 different.

[0050] Fig.12 yes Fig.11 A further perspective exploded view of the slider demoulding assembly shown in Fig.12 Angle of view and Fig.11 same.

[0051] Fig.13 yes Fig. 9 A top view of the slider demolding assembly shown in FIG.

[0052] Fig.14 It is Fig.13 Sectional view along line BB.

[0053] Fig.15 It is Fig.13 Sectional view along the CC line.

[0054] Fig.16 It is Fig.13 Sectional view along line DD.

[0055] Fig.17 yes Fig.16 A magnified view of the structure within the dashed box.

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

[0057] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0058] In order to make the full text of this application more accurate, all directions involved should be referred to as Figure 5 For reference, the direction of the X-axis is defined as the front-to-back direction, where the positive direction of the X-axis is the back; the direction of the Y-axis is defined as the up-down direction, where the positive direction of the Y-axis is the top; and the direction of the Z-axis is defined as the left-right direction.

[0059] Please refer to Figures 3 to 16 As shown, a long-stroke core-pulling slider mechanism disclosed in the present application is shown. The long-stroke core-pulling slider mechanism includes 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 stacked and arranged in the up and down direction. The upper mold assembly 1 and the lower mold assembly 2 can be opened and closed in the up and 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 stacked together to form an injection cavity (not numbered, which is actually Figure 7 The above-mentioned parts of the slider demoulding assembly 3 are used to jointly enclose and form the injection molding cavity.

[0060] Furthermore, the slider demoulding assembly 3 includes a guide rail member 31, a large slider 32, a large slider scraper 33, a small slider scraper 34, a center slider 35, a slider insert 36, a small slider 37 and a core pulling rack 38 that cooperate with each other. Among them, the guide rail member 31 is fixed on the upper mold assembly 1 and extends in the front-to-back direction. The large slider 32 sliding group is arranged on the guide rail member 31. Specifically, the lower end position of the large slider 32 along the up-down direction is recessed to form a slide rail receiving groove 325, and the slide rail receiving groove 325 extends in the front-to-back direction. At least part of the guide rail member 31 is implanted in the slide rail receiving groove 325 to realize that the large slider 32 sliding group is arranged on the guide rail member 31. The large slider 32 can slide relative to the guide rail member 31 in the front-to-back direction. The large slider scraper 33 is penetrated in the large slider scraper hole 321 formed on the large slider 32 in the up-down direction perpendicular to the front-to-back direction. The large slider shovel 33 straddles the guide rail 31, and the large slider shovel 33 can move relative to the guide rail 31 along the up-down direction. The small slider shovel 34 is inserted into the small slider shovel hole 322 formed on the large slider 32 along the up-down direction, and the small slider shovel 34 can move relative to the guide rail 31 along the up-down direction. The center slider 35 extends into a long strip along the front-to-back direction. The first end of the center slider 35 is inserted into the small slider accommodation 323 formed on the large slider 32. The end of the first end of the center slider 35 is matched with the inclined surface of the large slider shovel 33. The slider insert 36 is sleeved on the outer periphery of the second end of the center slider 35, and the slider insert 36 is fixed to one end of the large slider 32. The small slider 37 is inserted into the small slider hole 361 formed on the slider insert 36 along the up-down direction. The small slider 37 is limited by the small slider hole 361 along the front-to-back direction and can move relative to the slider insert 36 along the up-down direction. The upper edge of the small slider 37 exposes the slider insert 36 upward. The lower end position of the small slider 37 is matched with the inclined surface of the central slider 35. The lower end position of the small slider shovel 34 is matched with the inclined surface of the central slider 35.

[0061] Please refer to Figure 7 , Figure 8 and Fig.12As shown, a limit block 39 is fixedly provided below the central slider 35, and a limit groove 326 for accommodating the limit block 39 is formed at a corresponding position of the large slider 32. The limit groove 326 is open forward. The slider demoulding assembly 3 also includes 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 to one end of the large slider 32 through the adapter 30. The end surface of the adapter 30 adjacent to the large slider 32 blocks the forward opening of the limit groove 326, thereby limiting the limit block 39 in the limit groove 326 along the front-to-back direction. The limit block 39 can slide in the limit groove 326 along the front-to-back direction, so that the central slider 35 can slide relative to the large slider 32 in the front-to-back direction within a certain range (that is, within the delay length range of the limit groove 326 along the front-to-back direction).

[0062] Please refer to Figures 3 to 9 As shown, the upper end of the large slider shovel 33 is fixed to the upper mold assembly 1. The upper end of the small slider shovel 34 is fixed to the upper mold assembly 1. The core pulling rack 38 extends along the up-down direction and has a quadrilateral cross-section. The upper end position of the core pulling rack 38 is fixed to the upper mold assembly 1 by bolts. Along the left-right direction perpendicular to the front-to-back 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 cooperates with the inclined surface of the large slider 32. The core pulling rack 38 moves along the up-down direction to drive the large slider 32 to move along the front-to-back direction.

[0063] Please refer to Figures 5 to 14 As shown, specifically, in a preferred embodiment, inclined grooves 324 are formed on both sides of the large slider 32. An inclined convex rib 381 is formed on the corresponding inner side of the core pulling rack 38 to cooperate with the inclined groove 324. The inclined convex rib 381 meshes with the inclined groove 324 to form an inclined surface. Furthermore, a delay gap 380 is formed in the front-to-back direction (refer to Fig.14 As shown, that is, the width of the inclined groove 324 is greater than the width of the inclined rib 381). In a preferred embodiment, the inclined groove 324 is provided in plurality and is spaced adjacent to each other. The inclined rib 381 is provided in plurality and is spaced adjacent to each other. When the upper mold assembly 1 and the lower mold assembly 2 are opened and closed, the up and 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-to-back direction. The setting of the delay gap 380 can enable the core pulling rack 38 to drive the movement of the large slider 32 to lag for a specific time (preset time) as required.

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

[0065] Please refer to Figures 5 to 15 As shown. The end face of the large slider shovel 33 along the front-to-back direction forms an inclined surface (not labeled). The end of the first end of the center slider 35 forms a matching inclined surface (not labeled). The inclined surface of the large slider shovel 33 and the matching inclined surface of the center slider 35 form an inclined surface match. In this way, it can be achieved that: when the large slider shovel 33 moves downward along the up-down direction, the large slider shovel 33 drives the center slider 35 to move forward along the up-down direction; when the large slider shovel 33 moves upward along the up-down direction, the large slider shovel 33 has no driving effect on the center slider 35. In addition, an inclined boss 341 is formed at the lower end position of the small slider shovel 34, and a matching inclined groove 351 is formed on the center slider 35 corresponding to the position of the inclined boss 341 (the matching inclined groove 351 can be a through hole along the up-down direction, or a notch-shaped recessed from one side of the center slider 35. The embodiment of the attached drawings of the present application specification shows a notch-shaped matching inclined groove 351). The inclined boss 341 is correspondingly implanted in the matching inclined groove 351 to form an inclined surface match. When the small slider shovel 34 moves downward along the up-down direction, the small slider shovel 34 drives the central slider 35 to move forward along the front-back direction. When the small slider shovel 34 moves upward along the up-down direction, the small slider shovel 34 drives the central slider 35 to move backward along the front-back direction.

[0066] Please refer to Fig.11 and Fig.12As shown, the guide rail member 31 is formed with limiting grooves 311 on both sides corresponding to the position of the large slider shovel 33. The large slider shovel 33 straddles the guide rail member 31 and is formed with a lower end limiting foot 331 correspondingly limited in the limiting groove 311 along the front-to-back direction. The lower end limiting foot 331 includes a straight section 3311, and the straight section 3311 is located below the inclined surface of the large slider shovel and the end inclined surface of the first end of the center slider 35. The large slider shovel 33 can move in the up-down direction relative to the guide rail member 31. The large slider shovel 33 cannot move in the front-to-back direction and the left-to-right direction relative to the guide rail member 31. When the straight section 3311 moves downward and is inserted into the limiting groove 311, the large slider 32 stops moving forward.

[0067] Please refer to Figures 9 to 14 As shown, the slider demoulding assembly 3 of the present application also includes a limiting side plate 4, which is locked on the lower mold assembly 2 by nuts and abuts on both sides of the guide rail member 31, and the limiting side plate 4 is located below the large slider 32 along the up-down direction. The limiting side plate 4 is formed with a limiting groove portion 41 along the up-down direction at a position on one side of the limiting side plate 4 close to the guide rail member 31, and the large slider shovel 33 straddles the guide rail member 31 and is formed with a lower end limiting foot 331 correspondingly limited in the limiting groove portion 41 along the front-to-back direction. The limiting groove portion 41 has the same structural function as the above-mentioned limiting groove 311. In the drawings of the present application specification, the limiting groove portion 41 and the lower end limiting foot 331 are shown as not being tightly matched along the front-to-back direction. The drawings are only for illustration. In the implementation of the mold structure, in order to realize the limiting groove portion 41 limiting the lower end limiting foot 331 along the front-to-back direction, the limiting groove portion 41 and the lower end limiting foot 331 can be designed to be tightly matched.

[0068] The slider demoulding assembly 3 of the present application further includes a stopper 5, which is locked on the lower mold assembly 2 by a nut and is located below the guide rail 31. The guide rail 31 forms a notch 312 straddling the stopper 5 along the lower edge of the up-down direction, and the stopper 5 limits the guide rail 31 along the front-back direction. When the large slider shovel 33 moves downward to the limit position along the up-down direction, the large slider shovel 33 stops downward at the stopper 5.

[0069] Please refer to Figures 9 to 12 , Figures 16 to 18 As shown, the slide rail receiving groove 325 is formed in a recessed manner on the lower surface of the large slider 32 along the up-down direction. The slide rail receiving groove 325 extends along the front-back direction. At least a portion of the guide rail member 31 is implanted in the slide rail receiving groove 325 to enable the large slider 32 to be slidably assembled on the guide rail member 31. In one embodiment ( Fig.18In the embodiment shown in the figure, the slide rail receiving groove 325 is formed with a first inner groove surface 3251 parallel to the front-to-back direction, two second inner groove surfaces 3252 parallel to the front-to-back direction, and two third inner groove surfaces 3253 parallel to the front-to-back direction. The two third inner groove surfaces 3253 are parallel to each other. The portion of the guide rail member 31 implanted in the slide rail receiving groove 325 is formed with a first guide rail surface 301 respectively matching and affixing to the first inner groove surface 3251, two second guide rail surfaces 302 matching and affixing to the second inner groove surface 3252, and two third guide rail surfaces 303 matching and affixing to the third inner groove surface 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 the present application, a horizontal plane perpendicular to the up-down direction is defined (not shown, but actually a virtual plane). 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 ( Fig.18 In the embodiment shown in the figure, the slide rail receiving groove 325 includes, from top to bottom, a first slide rail groove section (unnumbered) and a second slide rail groove section (unnumbered) which are connected in sequence. Along the cross section perpendicular to the front-to-back direction, the cross section of the first slide rail groove section is formed so that the width along all directions decreases linearly from top to bottom (for example, an inverted isosceles trapezoid). Along the cross section perpendicular to the front-to-back direction, the cross section of the second slide rail groove section is formed so that the width along all directions is the same from top to bottom (for example, a rectangle). The matching structure of the slide rail receiving groove 325 and the guide rail member 31 designed in the present application can ensure a smaller friction force during startup (when opening and closing the mold) and ensure the positioning accuracy between the two, thereby ensuring that the long-stroke slider (here refers to the large slider 32) is not easy to get stuck during mold closing and demolding.

[0071] Please refer to Fig.17 ,for Fig.18 An alternative embodiment to the illustrated embodiment, Fig.17In the illustrated embodiment, fourth inner groove surfaces 3254 extend downwardly from both sides of the first inner groove surface 3251. The lower edge of the fourth inner groove surface 3254 is connected to the second inner groove surface 3252. The two second inner groove surfaces 3252 extend downwardly and tilt toward each other. The fourth inner groove surface 3254 is perpendicular to the horizontal plane. The lower edge of each second inner groove surface 3252 further extends downward to form the third inner groove surface 3253, and the third inner groove surface 3253 is perpendicular to the horizontal plane. The slide rail receiving groove 325 includes a third slide rail groove section (unnumbered), a first slide rail groove section (unnumbered) and a second slide rail groove section (unnumbered) connected from top to bottom. Along the cross section perpendicular to the front-to-back direction, the cross section of the third slide rail groove section is formed to have the same width from top to bottom in all directions. Along the cross section perpendicular to the front-to-back 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. Along the cross section perpendicular to the front-rear direction, the cross section of the second slide rail groove section is formed to have the same width from top to bottom along all directions. This can also ensure that the friction force is small during startup (when opening and closing the mold) and the positioning accuracy between the two can be ensured, and it can also ensure that the long-stroke slider (here refers to the large slider 32) is not easy to get stuck during mold closing and demolding.

[0072] The following is a detailed description of the actuation process of the long-stroke core-pulling slider mechanism of the present application in conjunction with the accompanying drawings:

[0073] When closing the mold:

[0074] Step 1: The upper mold assembly 1 synchronously drives the large slider scraper 33, the small slider scraper and the core pulling rack 38 downward; the core pulling rack 38 moves downward to drive the large slider 32, the center slider 35, the slider insert 36 and the small slider 37 to move forward in the front-to-back direction. During this process, the large slider scraper 33 and the small slider scraper 34 have not yet been inserted to the position of driving the center slider 35.

[0075] Step 2: The upper mold assembly 1 drives the large slider shovel 33, the small slider shovel and the core pulling rack 38 to move further downward until the inclined boss 341 of the small slider shovel 34 is inserted into the matching inclined groove 351, and the downward movement of the small slider shovel 34 drives the center slider 35 to move forward. During this process, the large slider shovel 33 synchronizes the small slider shovel 34 to move downward and limit the forward movement of the large slider 32 (mainly achieved by the straight section 3311 and the upright end wall at the rear end of the large slider shovel 33). The slider insert 36 and the large slider 32 are fixed, so the center slider 35 moves forward relative to 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 edge of the small slider 37 is pushed upward out of the small slider hole 361 on the slider insert 36. During this process, the large slider 32 is limited by the large slider shovel 33 in the front and rear directions and remains stationary, while the core-pulling rack 38 will move downward synchronously with the large slider shovel 33 and the small slider shovel 34. At this time, the above-mentioned delay gap 380 comes into play to absorb the above-mentioned relative movement until the mold is in place.

[0076] When opening the mold:

[0077] Step 1: The small slider scraper 34, the large slider scraper 33 and the core pulling rack 38 move upward together with the upper mold assembly 1. The inclined protrusion 341 of the small slider scraper 34 cooperates with the inclined groove 351 to realize that the upward movement of the small slider scraper 34 drives the central slider 35 to move backward, and then synchronizes the small slider 37 to move downward. In this process, due to the straight section 3311 of the large slider scraper 33 and the upright end wall at the rear end, while the large slider scraper 33 moves upward in the early stage of the model, the large slider 32 is stationary in the front-to-back direction. In addition, the slider insert synchronizes the large slider 32 and is also stationary in the front-to-back direction. The above-mentioned delay gap 380 is used to absorb the upward movement of the core pulling rack 38.

[0078] Step 2: The small slider scraper 34, the large slider scraper 33 and the core pulling rack 38 move upward together with the upper mold assembly 1 until the small slider scraper 34 is disengaged from the small slider accommodation 323 of the center slider 35; at this time, the large slider scraper 33 also disengages from the braking of the large slider 32, and the small slider 37 also moves downward to the extreme position and disengages from the injection molded product 6; after the core pulling rack 38 absorbs the delay gap 380, the inclined rib 381 corresponds to the inner surface of the inclined groove 324, and the further upward movement of the core pulling rack 38 drives the large slider 32 to move backward. At this time, the slider insert 36, the center slider 35 and the small slider 37 move backward synchronously with the large slider 32 until the mold is fully opened.

[0079] The long-stroke core-pulling slider mechanism designed in the present application can stably and effectively realize the demolding action of the undercut recessed portion 62 in the injection molded product 6. At the same time, the demolding actions of the center slider 35 and the large slider 32 in the front-to-back direction are cleverly linked through the mold opening action of the core-pulling rack 38 along the up-and-down direction to avoid excessive demolding stroke in the front-to-back direction, thereby realizing the miniaturized 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 appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A long-stroke slider demoulding mechanism, comprising an upper mold assembly (1), a lower mold assembly (2) and a slider demoulding assembly (3), wherein the upper mold assembly (1) and the lower mold assembly (2) can be opened and closed in the up and down directions, and the slider demoulding assembly (3) is implanted between the upper mold assembly (1) and the lower mold assembly (2), characterized in that: The slider demoulding assembly (3) comprises: A guide rail member (31) is fixed on the lower mold assembly (2) and extends in the front-rear direction; A large sliding block (32), the sliding block being arranged on the guide rail member (31), and the large sliding block (32) being able to slide relative to the guide rail member (31) in a front-rear direction; A large slider shovel (33) can be inserted into a large slider shovel hole (321) formed on the large slider (32) along an up-down direction perpendicular to the front-rear direction, the large slider shovel (33) straddles the guide rail (31), and the large slider shovel (33) can move relative to the guide rail (31) along the up-down direction; A small slider scraper (34) can be inserted into a small slider scraper hole (322) formed on the large slider (32) along the up-down direction, and the small slider scraper (34) can move relative to the guide rail member (31) along the up-down direction; The central slider (35) extends in the front-to-back direction into a long strip shape. The first end of the central slider (35) can be inserted into a small slider accommodation (323) formed on the large slider (32). The end of the first end of the central slider (35) cooperates with the inclined surface of the large slider shovel (33), and the lower end position of the small slider shovel (34) cooperates with the inclined surface of the central slider (35). A slider insert (36) is sleeved on the periphery of the second end of the central slider (35), and the slider insert (36) is fixed to one end of the large slider (32); The small slider (37) is inserted into a small slider hole (361) formed on the slider insert (36) along the up-down direction. The small slider (37) is limited by the small slider hole (361) along the front-back direction and can move relative to the slider insert (36) along the up-down direction. The lower end position of the small slider (37) cooperates with the inclined surface of the central slider (35).

2. The long-stroke slider demoulding mechanism according to claim 1, characterized in that: The upper end of the large slider scraper (33) is fixed to the upper mold assembly (1), and the upper end of the small slider scraper (34) is fixed to the upper mold assembly (1); The core pulling rack (38) is fixed on the upper mold assembly (1) and is located on both sides of the large slider (32) in the left and right directions perpendicular to the front-to-back direction and the up-down direction. The core pulling rack (38) cooperates with the inclined surface of the large slider (32) and restricts each other along the front-to-back direction. The core pulling rack (38) moves along the up-down direction to drive the large slider (32) to move along the front-to-back direction.

3. The long-stroke slider demoulding mechanism according to claim 2, characterized in that: Inclined grooves (324) are formed on both side surfaces of the large slider (32), and an inclined convex rib (381) matching with the inclined groove (324) is formed on the corresponding inner side surface of the core pulling rack (38), and the inclined convex rib (381) and the inclined groove (324) are meshed to form an inclined surface match; A time-delay gap (380) is formed between the outer surface of the inclined convex rib (381) and the inner surface of the inclined groove (324) along the front-to-back direction.

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

5. The long-stroke slider demoulding mechanism according to claim 2, 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), and the guide groove (382) extends along the up-down direction; The rack guide block (383) is fixed on the lower mold assembly (2), and the rack guide block (383) is protruded to form a guide protrusion (3831) corresponding to the guide groove (382).

6. The long-stroke slider demoulding mechanism according to claim 1, characterized in that: The large slider shovel (33) has an end face along the front-rear direction formed with an inclined surface, the end of the first end of the central slider (35) forms a matching inclined surface, and the inclined surface of the large slider shovel (33) and the matching inclined surface of the central slider (35) form an inclined surface match; When the large slider shovel (33) moves downward in the up-down direction, the large slider shovel (33) drives the central slider (35) to move forward in the front-back direction; When the large slider shovel (33) moves upward along the up-down direction, the large slider shovel (33) has no driving effect on the central slider (35).

7. The long-stroke slider demoulding mechanism according to claim 1, 2, 3, 4 or 6, characterized in that: The lower end of the small slider shovel (34) is formed with an inclined boss (341), and the central slider (35) is formed with a matching inclined groove (351) at a position corresponding to the inclined boss (341), and the inclined boss (341) is correspondingly implanted in the matching inclined groove (351) to form an inclined surface fit; When the small slider shovel (34) moves downward along the up-down direction, the small slider shovel (34) drives the central slider (35) to move forward along the front-back direction; When the small slider shovel (34) moves upward along the up-down direction, the small slider shovel (34) drives the central slider (35) to move backward along the front-back direction.

8. The long-stroke slider demoulding mechanism according to claim 1, 2, 3, 4 or 6, characterized in that: The guide rail member (31) is formed with limiting grooves (311) on both sides corresponding to the position of the large slider shovel (33); the large slider shovel (33) is straddled on the guide rail member (31) and is formed with a straight section (3311) correspondingly limited in the limiting groove (311) along the front-rear direction; the limiting groove (311) limits the straight section (3311) from moving relative to the guide rail member (31) along the front-rear direction.

9. The long-stroke slider demoulding mechanism according to claim 1, 2, 3, 4 or 6, characterized in that: Also includes: A slide rail receiving groove (325) is formed recessed at the lower end position of the large slider (32) along the up-down direction, and the slide rail receiving groove (325) extends along the front-back direction. At least a portion of the guide rail member (31) is implanted in the slide rail receiving groove (325) to realize the sliding assembly of the large slider (32) on the guide rail member (31).

10. The long-stroke slider demoulding mechanism according to claim 9, characterized in that: Also includes: A limiting side plate (4) is fixed to the lower mold assembly (2) by nuts and abuts against two sides of the guide rail member (31), wherein the limiting side plate (4) is located below the large slider (32) along the up-down direction; A limiting groove (41) is formed through the limiting side plate (4) at a position close to the guide rail (31) along the up-down direction, and the large sliding block shovel (33) straddles the guide rail (31) and is formed with a lower limiting foot (331) correspondingly limited in the limiting groove (41) along the front-back direction; A stopper (5) is fixed to the lower mold assembly (2) by a nut and is located below the guide rail member (31). The guide rail member (31) has a notch portion (312) formed along the lower edge of the up-down direction and straddling the stopper (5). The stopper (5) limits the guide rail member (31) along the front-rear direction. When the large slider shovel (33) moves downward along the up-down direction to the limit position, the large slider shovel (33) stops downward at the stop member (5).

11. The long-stroke slider demoulding mechanism according to claim 9, characterized in that: A limit block (39) is fixedly provided below the central slider (35), and a limit groove (326) for accommodating the limit block (39) is formed at a corresponding position of the large slider (32), and the limit groove (326) is open forward. An adapter (30) is sleeved on the periphery of one end of the slider insert (36), and the slider insert (36) is locked to one end of the large slider (32) through the adapter (30); The end surface of the adapter (30) adjacent to the large sliding block (32) blocks the forward opening of the limiting groove (326), thereby limiting the position of the limiting block (39) in the limiting groove (326) along the front-rear direction; The limiting block (39) can slide in the limiting groove (326) along the front-rear direction.

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