A multi-layer slider core-pulling mechanism

Abstract

The application discloses a kind of multilayer slider core-pulling mechanisms, including from top to bottom first slider, second slider, third slider and respective corresponding driving device, wherein the front end of first slider and the front end of third slider can be combined, and product injection mold core is formed;Second slider is located in the rear space between first slider and third slider, and is slidably installed on lower mould.The driving device of first slider is inclined guide pillar fixed on upper mould, and corresponding guide pillar through hole is arranged on it;The driving device of second slider is power oil cylinder fixed on lower mould, and is connected to the rear end of second slider;The driving device of third slider is T-shaped block arranged on second slider and T-shaped slot arranged on itself, and third slider is moved by the movement of second slider.The application has certain pertinence with simple structure and reasonable design, can be well adapted to the molding demolding of head large mouth small product, can guarantee the integrity of product, and improve product quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection mold, in particular to a multi-layer sliding block core-pulling mechanism. BACKGROUND

[0002] For injection molding products, if the structure of the product is special, there is a reverse buckle or cavity structure after molding, such as the products shown in Figure 1 and Figure 2 , the cavity structure of the molding product is large in head and small in mouth (i.e. the width of a1 is greater than the width of a2), for the demolding of such products, if the traditional core-pulling mechanism is used for injection demolding, only one core-pulling action can be realized, no matter which direction the core-pulling is performed, the small mouth side of the product will block and limit the entire large head core, and the normal demolding ejection of the product cannot be realized, especially for the molded products made of hard plastic material, strong core-pulling will cause extrusion and tearing of the product, which cannot be simply restored, and the edge of the product is easily pulled and torn, affecting the overall molding quality of the product. SUMMARY

[0003] The purpose of the present application is to solve the above-mentioned problems in the prior art and provide a multi-layer sliding block core-pulling mechanism.

[0004] To solve the above technical problems, the technical scheme adopted by the present application is: a multi-layer sliding block core-pulling mechanism, comprising a first sliding block, a second sliding block, a third sliding block and respective corresponding driving devices, the first sliding block, the second sliding block and the third sliding block are sequentially arranged from top to bottom, and are all arranged in the lower mold and can slide relative to each other; wherein the front end of the first sliding block and the front end of the third sliding block can be combined into one, forming a product injection core; the second sliding block is located below the rear half of the first sliding block and is slidingly installed on the lower mold.

[0005] The driving device of the first sliding block is a inclined guide pillar, the top end of the inclined guide pillar is fixedly installed on the upper mold, and the first sliding block is provided with a guide pillar through hole corresponding thereto.

[0006] The driving device of the second sliding block is a power oil cylinder, which is fixedly installed on the lower mold, 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 sliding block is a T-shaped block and a T-shaped groove which are adapted to each other, respectively arranged on the second sliding block and the third sliding block, and the movement of the second sliding block drives the movement of the third sliding block.

[0008] Further, the lower mold is provided with a sliding cavity, first guide pressing blocks are horizontally and fixedly installed on the two side walls of the sliding cavity, and a guide groove is formed between the first guide pressing blocks and the bottom surface of the sliding cavity, the two sides of the bottom of the second sliding block are respectively provided with outwardly extended first guide sliding blocks, and the first guide sliding blocks are slidingly 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 the guide direction of the first guide block is parallel to the extension direction of the oil cylinder, and correspondingly, a first sliding groove is arranged on the bottom surface of the second sliding block.

[0009] Further, the second sliding block comprises an integrally formed base portion and a guide portion, the guide portion is located at the front end of the base portion, the longitudinal section of the guide portion 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; the two sides of the guide portion of the second sliding block are upwardly protruded into walls, the inner side surfaces of the walls are arranged in a stepped manner, a second guide pressing block is fixedly installed on the walls, the top surface of the guide portion is parallel to the second guide pressing block, and a guide groove is formed between the second guide pressing block and the top surface of the guide portion, the two sides of the bottom of the first sliding block are respectively outwardly extended with second guide sliding blocks, and the second guide sliding blocks are slidingly installed in the guide grooves on the corresponding sides.

[0010] Further, the third sliding block comprises an integrally formed guide seat and a core portion, the top surface of the guide seat is parallel to the bottom surface of the guide portion of the second sliding block and is arranged in an inclined manner, and a T-shaped groove matched with the T-shaped block is arranged on the guide seat; the top surface of the core portion is flush with the bottom surface of the front end portion of the first sliding block.

[0011] Further, a plurality of limiting blocks are fixedly installed on the rear end of the third sliding block, and correspondingly, a stroke groove is arranged on the bottom surface of the guide portion of the second sliding block.

[0012] Further, the second sliding block is provided with a long strip-shaped guide groove hole located below the guide column through hole in the first sliding block, and the inclined guide column passes through the corresponding guide groove hole.

[0013] Further, the first guide block and the second guide block are both cuboid structures.

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

[0015] Compared with the prior art, the present application has the following beneficial effects: the present application has a simple structure, a reasonable design, a certain pertinence, and can be well adapted to the molding and demolding of the head-large-mouth-small products shown in the prior art Figure 1 and Figure 2 The sequential actions of the plurality of different sliding blocks can guarantee the integrity of the products and improve the overall quality of the products. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Structure diagram of the formed product targeted by the present application;

[0017] Figure 2 For Figure 1 Cross-sectional view in A-A direction;

[0018] Figure 3 Structure diagram of the present application;

[0019] Figure 4 For Figure 3 Longitudinal center cross-sectional view of the structure;

[0020] Figure 5 Structure diagram of the first slider in the present application;

[0021] Figure 6 Bottom view of the first slider in the present application;

[0022] Figure 7 Structure diagram of the overall structure of the second slider and the third slider assembled in the lower mold in the present application;

[0023] Figure 8 Structure diagram of the second slider in the present application;

[0024] Figure 9 Bottom view of the second slider in the present application;

[0025] Figure 10 Structure diagram of the guiding component assembled on the second slider in the present application;

[0026] Figure 11 Structure diagram of the third slider in the present application;

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

[0028] It should be noted that in the description of the present application, the terms such as "upper", "lower", "left", "right", "front", "back", "one end", "the other end", "inner", "outer", "center", "same direction", "axle side", "top", "bottom", "side" and the like indicate the orientation or positional relationship shown in the drawings, which is only a relationship word determined for the purpose of describing the structural relationship of the components in the present application, and does not specifically indicate that any component in the present application must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as a limitation on the present application.

[0029] In addition, in the present application, the description such as "first", "second" and the like is only for the purpose of description, and is not specifically intended to indicate the order or sequence, nor to limit the present application, but only to distinguish the components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features.

[0030] In the description of the present application, it should be noted that unless otherwise specifically specified and limited, the terms "mounting", "connecting", "connecting", "setting" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

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

[0032] A multi-layer slider core-pulling mechanism, mainly for the molding and demolding of head-large-mouth-small cavity products as shown in Figure 1 and Figure 2 , comprising a first slider 4, a second slider 5, a third slider 6 and respective corresponding driving devices, as shown in Figures 3 to 11 , the first slider 4, the second slider 5 and the third slider 6 are all arranged on the lower mold 2, and are sequentially stacked from top to bottom, and can slide relatively independently, wherein the front end part 42 of the first slider 4 can be combined with the front end core part 62 of the third slider 6 to form the injection core of the cavity in the product; the rear half of the first slider 4 and the rear half of the third slider 6 form a triangular opening space, 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 with the lower mold 2 under the action of the injection molding machine, to complete the mold closing or mold opening action. As shown in Figure 3As shown, the lower die 2 is provided with a sliding cavity on the side facing the upper die 1, and a plurality of high-force brass graphite wear-resistant plates are fixedly installed on the inner bottom surface of the sliding cavity through countersunk head bolts, and two first guide blocks 22 parallel to each other are fixedly installed on the inner bottom surface of the sliding cavity; two first guide pressing blocks 21 are symmetrically fixedly installed on the two vertical side walls of the sliding cavity, respectively, and the first guide pressing blocks 21 protrude inwardly to form a first guide groove with the inner bottom surface of the sliding cavity.

[0034] In combination Figure 7 And Figure 8 As shown, the second sliding block 5 is slidingly installed in the sliding cavity of the lower die 2, and includes a 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 the longitudinal section of the guide portion 52 is triangular, with the front being narrow and the rear being wide; the bottom surface of the base portion 51 is provided with a first sliding groove 59 matched with the first guide block 22, and the outer bottom portions of the left and right ends of the base portion 51 are further fixedly provided with first guide sliding blocks 58 integrally formed and horizontally protruding outward, which are matched with the first guide groove in the sliding cavity of the lower die 2, so that the second sliding block 5 is slidingly installed on the lower die 2. Referring to Figure 10 As shown, two second guide blocks 53 parallel to each other are fixedly installed on the top end surface of the guide portion 52; two T-shaped blocks 54 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, and the inner side surfaces of the vertical walls are arranged in a stepped manner, and second guide pressing blocks 57 are fixedly installed on the vertical walls through countersunk head bolts, and the second guide pressing blocks 57 protrude inwardly and are parallel to the top end surface of the guide portion 52, and a guide groove is formed between the second guide pressing blocks 57 and the top end surface of the guide portion 52.

[0035] The driving device of the second sliding block 5 is a power oil cylinder 7, which can be a hydraulic oil cylinder, and is fixedly installed on the outer side of the lower die 2 through an oil cylinder support, and the piston rod of the power oil cylinder 7 extends into the sliding cavity of the lower die 2 and is parallel to the setting direction of the first guide block 22; the distal end of the piston rod is connected to the rear end side of the base portion 51 of the second sliding block 5 through a rod end connecting piece, and drives the second sliding block 5 to slide forward and backward in the sliding cavity through the extension and retraction thereof.

[0036] The first sliding block 4 is slidingly installed above the guide portion 52 of the second sliding block 5, in combination Figure 5 And Figure 6As shown, the first slider 4 comprises a body part and a front end part 42 which are integrally formed, wherein the outer bottom of the two side walls of the body part is provided with a second guide slider 43 which is outwardly extended and matched with the guide groove on the second slider 5, the bottom surface of the first slider 4 is parallel to the top end surface of the guide part 52 of the second slider 5, and the bottom surface is provided with a second guide groove 44 which is concave and has a limited length; through the sliding limiting 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 of the second slider 5, the first slider 4 and the second slider 5 are slidingly assembled.

[0037] The driving device of the first slider 4 is a inclined guide column 3, the top end of the inclined guide column 3 is fixedly installed on the upper die 1; correspondingly, the body part of the first slider 4 is provided with a guide column through hole 41, the inclined guide column 3 is slidingly inserted into the corresponding guide column through hole 41, and the inclined guide column 3 is slidingly inserted into the corresponding guide column through hole 41. Figure 9 As shown, the base part 51 of the second slider 5 is provided with a long strip-shaped guide groove hole 55 matched with the inclined guide column 3, so as to accommodate the inclined guide column 3.

[0038] The third slider 6 is slidingly installed below the guide part 52 of the second slider 5, in combination with Figure 11 As shown, the third slider 6 comprises a guide seat 61 and a core part 62 which are integrally formed, wherein the core part 62 is located at the front end of the guide seat 61, the top end surface of the guide seat 61 is parallel to the lower end surface of the guide part 52 of the second slider 5 and is arranged in an inclined manner, and the guide seat 61 is provided with a T-shaped groove 63 matched with the T-shaped block 54 of the second slider 5; at the same time, the rear end top of the guide seat 61 is further fixedly installed with a limiting stop block 64 through a countersunk bolt, and correspondingly, the bottom surface of the guide part 52 of the second slider 5 is provided with a stroke groove 56, in combination with Figure 10 As shown, the limiting stop block 64 is slidingly installed in the corresponding stroke groove 56 and can form a blocking limit with the front end of the stroke groove 56. The top end surface of the core part 62 of the third slider 6 is flush with the bottom surface of the front end part 42 of the first slider 4 and can be closely attached.

[0039] Further optimization technical scheme, the first guide block 22 and the second guide block 53 are both cuboid structures.

[0040] The specific working principle is as follows: when Figure 1After the middle product is injection molded, the upper mold 1 first moves upward to open the mold, driving the inclined guide pillar 3 to move upward synchronously, thereby driving the first sliding block 4 to move backward along the direction of the second guide pressure block 57 of the second sliding block 5, the front end portion 42 of the first sliding block 4 moves outward to separate from the product, and the upper cavity space is released; then the piston rod of the power oil cylinder 7 retracts, driving the second sliding block 5 to move along the direction of the first guide pressure block 21 in the sliding cavity of the lower mold 2, and the T-shaped block 54 on the second sliding block 5 moves synchronously, because of the sliding limiting cooperation between the T-shaped block 54 and the T-shaped groove 63, the third sliding block 6 is driven to move upward, so that the core portion 62 of the third sliding block 6 moves upward to separate from the lower cavity space of the product; when rising to a certain height, the product cavity and the core portion 62 do not block each other, at this time, the limiting block 64 fixed on the third sliding block 6 slides to the front end of the stroke groove 56 of the second sliding block 5, and a limiting block is formed between the two, after being subjected to the block force, the third sliding block 6 is driven to complete the core pulling action backward, thereby completely completing the core pulling and demolding, and the quality of the molded product is ensured.

[0041] Of course, the above description is not a limitation of the present application, and the present application is not limited to the above examples, and the changes, modifications, additions or replacements made by the person skilled in the art within the essential scope of the present application should also belong to the protection scope of the present application.

Claims

1. A multi-layer slider core-pulling mechanism, characterized in that: It includes a first slider, a second slider, a third slider, and their respective driving devices. The first slider, the second slider, and the third slider are arranged sequentially from top to bottom, all placed inside the lower mold, and can slide relative to each other. The front ends of the first slider and the third slider can also be combined to form a product injection molding 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 for the first slider is an inclined guide post, the top of which is fixedly mounted on the upper mold. The first slider has a corresponding guide post through hole. The lower mold has a sliding cavity, and first guide blocks are horizontally fixedly mounted on both sides of the sliding cavity. A guide groove is formed between the first guide blocks and the bottom surface of the sliding cavity. The bottom sides of the second slider are respectively provided with outwardly extending first guide sliders, which are slidably mounted in the guide grooves on the corresponding sides. A first guide block is also fixedly mounted on the bottom surface of the sliding cavity, and its guiding direction is parallel to the extension and retraction direction of the hydraulic cylinder. Correspondingly, the bottom surface of the second slider has a first sliding groove. The driving device for the second slider is a hydraulic cylinder, which is fixedly installed on the lower mold, and the end of its piston rod is connected to the rear end of the second slider. The second slider includes an integrally formed base part and a guide part. The guide part is located at the front end of the base part and its longitudinal section is triangular. A T-shaped block is fixedly installed on the bottom surface of the guide part, and a second guide block is fixedly installed on the top surface of the guide part. Both sides of the guide part of the second slider protrude upward to form walls, and the inner side of the wall is stepped. A second guide pressure block is fixedly installed on it, parallel to the top surface of the guide part, and forms a guide groove with it. The bottom sides of the first slider have second guide sliders extending outward from each other and slidingly installed into the guide grooves on the corresponding sides. The driving device for the third slider consists of mutually compatible T-blocks and T-slots, respectively mounted on the second and third sliders. The movement of the second slider drives the movement of the third slider. The third slider includes an integrally formed guide seat and a core portion. The top surface of the guide seat is parallel to the bottom surface of the guide portion in the second slider and is inclined. It has 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 of the first slider.

2. The multi-layer slider core-pulling mechanism according to claim 1, characterized in that: The rear end of the third slider is fixedly equipped with multiple limit blocks, and correspondingly, the bottom surface of the guide part of the second slider is provided with a stroke groove.

3. The multi-layer slider core-pulling mechanism according to claim 1, characterized in that: The second slider is provided with an elongated guide slot, located below the guide post through hole in the first slider, and the inclined guide post passes through the corresponding guide slot.

4. The multi-layer slider core-pulling mechanism according to claim 1, characterized in that: Both the first guide block and the second guide block are cuboid structures.

5. A multi-layer slider core-pulling mechanism according to claim 1, characterized in that: The bottom surface of the first slider is provided with a second guide groove that is adapted to the second guide block, and the length of the second guide groove has a fixed stroke.

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