Multi-layer sliding block core-pulling mechanism

Abstract

The multi-layer sliding block core pulling mechanism comprises a first sliding block, a second sliding block, a third sliding block and respective corresponding driving devices which are arranged from top to bottom, and the front end of the first sliding block and the front end of the third sliding block can be combined into a whole to form a product injection molding mold core; the second sliding block is located in the rear space between the first sliding block and the third sliding block and installed on the lower die in a sliding mode. A driving device of the first sliding block is an inclined guide pillar fixed on the upper die, and a corresponding guide pillar through hole is formed in the inclined guide pillar; a driving device of the second sliding block is a power oil cylinder fixed to the lower die and connected to the rear end of the second sliding block. A driving device of the third sliding block comprises a T-shaped block arranged on the second sliding block and a T-shaped groove formed in the T-shaped block, and the third sliding block is driven to move through movement of the second sliding block. The mold is simple in structure and reasonable in design, has certain pertinence, can be well matched with molding and demolding of products with large heads and small openings, and can ensure the integrity of the products and improve the quality of the products.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to a multi-layer slider core-pulling mechanism. Background Art

[0002] For injection molded products, if the product structure is special, there are undercuts or cavity structures after molding, such as Figure 1 and Figure 2 The product shown in the figure has a cavity structure with a large head and a small mouth (i.e., the width of a1 is greater than the width of a2). For the demolding of this product, if a traditional core pulling mechanism is used for injection molding demolding, only one core pulling action can be achieved. No matter from which direction the core is pulled, the small mouth side of the product will block and restrict the entire large-head core, and the normal demolding and ejection of this product cannot be achieved. Especially for molded products made of hard plastic materials, strong core pulling will lead to squeezing and breaking of the product, which cannot be easily restored, and it is very easy to tear and tear the edge of the product, affecting the overall molding quality of the product. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art and to provide a multi-layer slider core pulling mechanism.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a multi-layer slider core pulling mechanism, including a first slider, a second slider, a third slider and their corresponding driving devices, the first slider, the second slider and the third slider are arranged in sequence from top to bottom, are all placed in the lower mold, and can slide relative to each other; the front end of the first slider and the front end of the third slider can also be combined into one to form a product injection core; the second slider is located below the rear half of the first slider, and is slidably installed on the lower mold.

[0005] The driving device of the first sliding block is an inclined guide column, the top end of which is fixedly mounted on the upper die, and the first sliding block is provided with a guide column through hole corresponding thereto.

[0006] The driving device of the second sliding block is a power cylinder, which is fixedly mounted on the lower die, and the end of the piston rod thereof is connected to the rear end of the second sliding block.

[0007] The driving device of the third slider is a T-shaped block and a T-shaped slot that are adapted to each other and are respectively arranged on the second slider and the third slider, and the movement of the second slider drives the movement of the third slider.

[0008] Furthermore, a sliding cavity is provided on the lower mold, and a first guide pressure block is horizontally fixedly installed on both side walls of the sliding cavity, and a guide groove is formed between the first guide pressure block and the bottom surface of the sliding cavity. The bottoms of both sides of the above-mentioned second sliding block are respectively provided with first guide sliding blocks extending outward, and the first guide sliding blocks are slidably installed in the guide grooves on the corresponding sides; a first guide block is also fixedly installed on the bottom surface of the sliding cavity, and its guiding direction is parallel to the extension and contraction direction of the cylinder, and correspondingly, a first sliding groove is provided on the bottom surface of the second sliding block.

[0009] Furthermore, the second slider includes an integrally formed base portion and a guide portion, the guide portion is located at the front end of the base portion, and its longitudinal cross-section is triangular, a T-block is fixedly installed on the bottom surface of the guide portion, and a second guide block is fixedly installed on the top surface of the guide portion; both sides of the guide portion of the second slider protrude upward to form a wall, and the inner side surface of the wall is arranged in a stepped shape, on which a second guide pressure block is fixedly installed, which is parallel to the top surface of the guide portion and forms a guide groove therewith, and second guide sliders are respectively extended outward from the bottom of both sides of the above-mentioned first slider, and are slidably installed in the guide grooves on the corresponding sides.

[0010] Furthermore, the third slider includes an integrally formed guide seat and a core portion, wherein the top surface of the guide seat is parallel to the bottom surface of the guide portion in the above-mentioned second slider, is arranged in an inclined state, and is provided with a T-slot that is compatible with the T-block; the top surface of the core portion is flush with the bottom surface of the front end portion of the above-mentioned first slider.

[0011] Furthermore, a plurality of limit blocks are fixedly mounted on the rear end of the third sliding block, and correspondingly, a travel groove is provided on the bottom surface of the guide portion in the second sliding block.

[0012] Furthermore, the second slider is provided with a long guide slot hole, which is located below the guide post through hole in the first slider, and the oblique guide post passes through the corresponding guide slot hole.

[0013] Furthermore, the first guide block and the second guide block are both rectangular parallelepiped structures.

[0014] Furthermore, a second guide groove matched with the second guide block is provided on the bottom surface of the first sliding block, and the length of the second guide groove has a fixed stroke.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a simple structure, reasonable design, certain pertinence, and can be well adapted to Figure 1 and Figure 2 The molding and demoulding of the product with a large head and a small mouth shown in the figure utilizes the sequential actions of multiple different sliders to complete the demoulding, which can ensure the integrity of the product and improve the overall quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the molded product targeted by the present invention;

[0017] Figure 2 for Figure 1 Sectional view in the AA direction;

[0018] Figure 3 It is a structural schematic diagram of the present invention;

[0019] Figure 4 for Figure 3 A longitudinal central section view of the middle structure;

[0020] Figure 5 It is a schematic structural diagram of the first sliding block in the present invention;

[0021] Figure 6 is a bottom view of the first sliding block in the present invention;

[0022] Figure 7 It is a schematic diagram of the overall structure of the second slider and the third slider being assembled on the lower mold in the present invention;

[0023] Figure 8 is a schematic structural diagram of the second sliding block in the present invention;

[0024] Fig. 9 is a bottom view of the second sliding block in the present invention;

[0025] Fig.10 It is a structural schematic diagram of assembling the guide component on the second sliding block in the present invention;

[0026] Fig.11 is a schematic structural diagram of a third sliding block in the present invention;

[0027] In the figure: 1, upper die, 2, lower die, 3, inclined guide column, 4, first slider, 5, second slider, 6, third slider, 7, power cylinder, 21, first guide pressure block, 22, first guide block, 41, guide column through hole, 42, front end portion, 43, second guide slider, 44, second guide groove, 51, base portion, 52, guide portion, 53, second guide block, 54, T-block, 55, guide slot hole, 56, stroke slot, 57, second guide pressure block, 58, first guide slider, 59, first sliding groove, 61, guide seat, 62, core portion, 63, T-slot, 64, limit block. DETAILED DESCRIPTION

[0028] It should be noted that, in the description of the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "one end", "the other end", "inside", "outside", "center", "same direction", "axial side", "top", "bottom", "side", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various components in the present invention, and do not specifically mean that any component in the present invention must have a specific orientation, be constructed and operated in a specific orientation, and should not be understood as a limitation on the present invention.

[0029] In addition, in the invention, the descriptions such as "first" and "second" are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their 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.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set", etc. 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:

[0032] A multi-layer slider core pulling mechanism, mainly for Figure 1 and Figure 2 The molding and demoulding of the cavity product with a large head and a small mouth shown in FIG. 1 includes a first slider 4, a second slider 5, a third slider 6 and respective corresponding driving devices, as shown in FIG. Figures 3 to 11 As shown, the first slider 4, the second slider 5 and the third slider 6 are all arranged on the lower mold 2, stacked in sequence from top to bottom, and can slide relatively independently, wherein the front end portion 42 of the first slider 4 can be combined with the front end core portion 62 of the third slider 6 to form an injection core of the cavity in the above-mentioned product; a triangular opening space is formed between the rear half of the first slider 4 and the rear half of the third slider 6, and the front half of the second slider 5 is placed in the triangular space.

[0033] The upper mold 1 can be opened and closed relative to the lower mold 2 under the action of the injection molding machine to complete the mold closing or mold opening action. Figure 3As shown, a sliding cavity is provided on the side of the lower die 2 facing the upper die 1, and a plurality of high-strength brass graphite wear-resistant plates are fixedly installed on the inner bottom surface of the sliding cavity by countersunk bolts, and two mutually parallel first guide blocks 22 are fixedly installed on the inner bottom surface of the sliding cavity; first guide pressure blocks 21 are symmetrically fixedly installed on the two vertical side walls of the sliding cavity, and the first guide pressure blocks 21 protrude inward to form a first guide groove with the inner bottom surface of the sliding cavity.

[0034] Combination Figure 7 and Figure 8 As shown, the second slider 5 is slidably installed in the sliding cavity of the lower mold 2, and includes an integrally formed base portion 51 and a guide portion 52, wherein the guide portion 52 is located at the front end of the base portion 51, and its longitudinal cross-section is triangular, narrow in front and wide in the back; a first sliding groove 59 adapted to the first guide block 22 is provided on the bottom surface of the base portion 51, and an integrally formed, horizontally convex first guide slider 58 is fixed on the outer bottom of the left and right ends of the base portion 51, which is adapted to the first guide groove in the sliding cavity of the lower mold 2. Through the cooperation of the two, the second slider 5 is slidably installed on the lower mold 2. Refer to Fig.10 As shown, two second guide blocks 53 spaced apart and parallel to each other are fixedly installed on the top surface of the guide portion 52; two T-shaped blocks 54 spaced apart and parallel to each other are fixedly installed on the bottom surface of the guide portion 52; the left and right ends of the guide portion 52 are provided with upwardly protruding vertical walls, the inner side surfaces of the vertical walls are arranged in a stepped shape, and a second guide pressing block 57 is fixedly installed thereon by countersunk bolts, and the second guide pressing block 57 extends inwardly and is parallel to the top surface of the guide portion 52, and a guide groove is formed between the two.

[0035] The driving device of the second slider 5 is a power cylinder 7, which can be a hydraulic cylinder, which is fixedly installed on the outer side of the lower mold 2 through a cylinder bracket, and its piston rod extends into the sliding cavity on the lower mold 2, parallel to the setting direction of the above-mentioned first guide block 22; the end of the piston rod is connected to the rear end side of the base part 51 in the above-mentioned second slider 5 through a rod end connecting piece, and the second slider 5 is driven to slide back and forth along the sliding cavity through its extension and contraction.

[0036] The first slider 4 is slidably mounted above the guide portion 52 of the second slider 5, and combined with Figure 5 and Figure 6As shown, the first slider 4 includes an integrally formed main body and a front end portion 42, wherein the outer bottom of the two side walls of the main body is provided with a second guide slider 43 that is adapted to the guide groove on the second slider 5 and extends outward, the bottom surface of the first slider 4 is parallel to the top end surface of the guide portion 52 in the second slider 5, and a concave second guide groove 44 with a limited length is provided on the bottom surface; the first slider 4 and the second slider 5 are slidably assembled through the sliding limit cooperation between the second guide slider 43 and the guide groove on the corresponding side of the second slider 5, and the sliding cooperation between the second guide groove 44 and the second guide block 53 on the second slider 5.

[0037] The driving device of the first slider 4 is an inclined guide column 3, the top end of which is fixedly mounted on the upper mold 1; correspondingly, a guide column through hole 41 is provided on the main body of the first slider 4, and the inclined guide column 3 is slidably inserted into the corresponding guide column through hole 41. Fig. 9 As shown, the base portion 51 of the second sliding block 5 is provided with a long strip-shaped guide slot 55 adapted to the inclined guide column 3 to accommodate the inclined guide column 3 .

[0038] The third slider 6 is slidably mounted below the guide portion 52 of the second slider 5, and is combined with Fig.11 As shown, the third slider 6 includes an integrally formed guide seat 61 and a core portion 62, wherein the core portion 62 is located at the front end of the guide seat 61, and the top end surface of the guide seat 61 is parallel to the lower end surface of the guide portion 52 in the second slider 5, and is arranged in an inclined shape, and is provided with a T-slot 63 adapted to the T-block 54 in the second slider 5; at the same time, a limited stopper 64 is fixedly installed on the top of the rear end of the guide seat 61 by a countersunk bolt, and correspondingly, a travel groove 56 is provided on the bottom surface of the guide portion 52 in the second slider 5, referring to Fig.10 As shown, the limit stopper 64 is slidably installed in the corresponding travel groove 56 and can form a blocking limit with the front end of the travel groove 56. The top surface of the core portion 62 in the third slider 6 is flush with the bottom surface of the front end portion 42 in the first slider 4 and can fit tightly.

[0039] According to a further optimized technical solution, the first guide block 22 and the second guide block 53 are both rectangular parallelepiped structures.

[0040] The specific working principle is as follows: Figure 1After the product is injection molded, the upper mold 1 first moves upward to open the mold, driving the inclined guide column 3 to move upward synchronously, thereby driving the first slider 4 to perform a core-pulling movement backward along the direction of the second guide pressure block 57 on the second slider 5, and the front end 42 of the first slider 4 is pulled out of the product to free up the upper cavity space; then the piston rod in the power cylinder 7 retracts, driving the second slider 5 to perform a core-pulling movement horizontally backward along the direction of the first guide pressure block 21 in the upper sliding cavity of the lower mold 2, and the T-block 54 on it moves synchronously. Due to the sliding limit cooperation between the T-block 54 and the T-slot 63, the third slider 6 is driven to move upward, so that the core part 62 of the third slider 6 is upwardly separated from the lower cavity space of the product; when it rises to a certain height, there is no obstruction between the product cavity and the core part 62. At this time, the fixed limit stopper 64 on the third slider 6 slides to the front end of the stroke groove 56 on the second slider 5, and a limit block is formed between the two. After being subjected to the blocking force, the third slider 6 is driven to complete the core-pulling action backward, thereby completing the core-pulling demoulding and ensuring the quality of the molded product.

[0041] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A multi-layer slider core pulling mechanism, characterized in that: The invention comprises a first slider, a second slider, a third slider and corresponding driving devices, wherein the first slider, the second slider and the third slider are arranged in sequence from top to bottom, are placed in the lower mold, and can slide relative to each other; wherein the front end of the first slider and the front end of the third slider can also be combined into one to form a product injection core; the second slider is located below the rear half of the first slider and is slidably mounted on the lower mold; The driving device of the first slider is an inclined guide column, the top end of which is fixedly mounted on the upper mold, and the first slider is provided with a corresponding guide column through hole; The driving device of the second slider is a power cylinder, which is fixedly mounted on the lower die, and the end of the piston rod is connected to the rear end of the second slider; The driving device of the third slider is a T-shaped block and a T-shaped slot that are adapted to each other and are respectively arranged on the second slider and the third slider, and the movement of the second slider drives the movement of the third slider.

2. A multi-layer slider core-pulling mechanism according to claim 1, characterized in that: A sliding cavity is provided on the lower mold, and first guide pressure blocks are horizontally fixedly installed on both side walls of the sliding cavity, and a guide groove is formed between the first guide pressure block and the bottom surface of the sliding cavity. The bottoms of both sides of the second sliding block are respectively provided with first guide sliding blocks extending outward, and the first guide sliding blocks are slidably installed in the guide grooves on the corresponding sides; a first guide block is also fixedly installed on the bottom surface of the sliding cavity, and its guiding direction is parallel to the extension and contraction direction of the cylinder, and correspondingly, a first sliding groove is provided on the bottom surface of the second sliding block.

3. A multi-layer slider core-pulling mechanism according to claim 2, characterized in that: The second slider includes an integrally formed base portion and a guide portion, the guide portion is located at the front end of the base portion, and its longitudinal cross-section is triangular, a T-shaped block is fixedly installed on the bottom surface of the guide portion, and a second guide block is fixedly installed on the top surface of the guide portion; both sides of the guide portion of the second slider protrude upward to form a wall, and the inner side surface of the wall is arranged in a stepped shape, on which a second guide pressure block is fixedly installed, which is parallel to the top surface of the guide portion and forms a guide groove therewith, and second guide sliders are respectively extended outward from the bottom of both sides of the above-mentioned first slider, and are slidably installed in the guide grooves on the corresponding sides.

4. A multi-layer slider core-pulling mechanism according to claim 2, characterized in that: The third slider includes an integrally formed guide seat and a core part, wherein the top surface of the guide seat is parallel to the bottom surface of the guide part in the above-mentioned second slider, is arranged in an inclined state, and is provided with a T-slot adapted to the T-block; the top surface of the core part is flush with the bottom surface of the front end portion of the above-mentioned first slider.

5. A multi-layer slider core-pulling mechanism according to claim 4, characterized in that: A plurality of limit blocks are fixedly mounted on the rear end of the third sliding block, and correspondingly, a travel groove is provided on the bottom surface of the guide portion in the second sliding block.

6. A multi-layer slider core-pulling mechanism according to claim 2, characterized in that: The second sliding block is provided with a long strip-shaped guide slot hole, which is located below the guide post through hole in the first sliding block, and the oblique guide post passes through the corresponding guide slot hole.

7. A multi-layer slider core-pulling mechanism according to claim 3, characterized in that: The first guide block and the second guide block are both rectangular parallelepiped structures.

8. The multi-layer slider core-pulling mechanism according to claim 3, characterized in that: A second guide groove matched with the second guide block is provided on the bottom surface of the first sliding block, and the length of the second guide groove has a fixed stroke.

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