Precision mold suitable for plastic product production

Abstract

The utility model relates to the technical field of plastic product production, and discloses a precision mold suitable for plastic product production, which comprises a base, first fixing rods are fixedly connected to the top of the base in a front-back and left-right symmetrical manner, a fixing seat is fixedly connected to the top ends of the four first fixing rods, and a jacking mold taking mechanism is arranged at the top of the base. And a balance mechanism is arranged at the top of the fixed seat. The jacking mold taking mechanism drives a two-way lead screw to rotate through a servo motor, moving blocks which are symmetrical left and right are driven to move oppositely, and then through transmission of a hinge rod, stable ascending of a lifting plate, a sliding rod and an inner mold plate is achieved. Compared with a traditional manual mold taking or complex demolding structure, the mechanical transmission jacking mode is high in automation degree, a formed plastic product can be rapidly and accurately ejected out of the lower mold base, the mold taking efficiency is improved, the labor intensity of workers and the production cost are reduced, and meanwhile the risk of product damage caused by improper manual operation is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastic product production, specifically to a precision mould suitable for plastic product production. BACKGROUND

[0002] In modern industrial production, plastic products are widely used in many fields such as electronics, automobiles, etc. due to their light weight, corrosion resistance, and various molding processes. As the key equipment for plastic product molding, the performance of precision molds directly affects the quality, production efficiency and cost of products.

[0003] According to the announcement number CN 220179896 U, a precision mould suitable for plastic product production, including precision mould county mechanism; the top front side of the base is bolted to the bottom of the fixed seat, and the top of the fixed seat is bolted to the bottom of the plastic product processing upper die seat.

[0004] The device adopts a stepper motor to drive a lead screw, controls the downward movement of a ball nut along the outer wall of the lead screw, pushes the L-shaped plate and the plastic product processing upper die seat to move downward synchronously, and at the same time, the two side guide sleeves ensure the stability of the plastic product processing upper die seat, so that the plastic product processing upper die seat pushes the sliding block, enhances the mold closing precision and pressing force, and when the mold is opened, the cylinder separates the upper plastic product processing lower die seat, the stepper motor accurately returns the plastic product processing upper die seat, and through the cooperation of the linear drive of the guide column, guide sleeve, slide rail, sliding block and lead screw, more accurate and stable mold closing and opening operations are realized, and the processing precision and efficiency of the mold are effectively improved. However, the device does not set the mold taking process, and relies on manual operation in the mold taking link. Manual mold taking not only has low efficiency, but also is difficult to meet the demand of large-scale production, and in the operation process, the surface of the plastic product is easily scratched and deformed due to human factors. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a precision mould suitable for plastic product production to solve the problems in the above background technology.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a precision mould suitable for plastic product production, comprising a base, the top of the base is fixedly connected with first fixed rods which are symmetrically arranged left and right, the top of each first fixed rod is fixedly connected with a fixed seat, the top of the fixed seat is fixedly connected with a hydraulic cylinder, the output end of the hydraulic cylinder is connected with an upper die seat, the top of the base is fixedly connected with second fixed rods which are symmetrically arranged left and right, the top of each second fixed rod is fixedly connected with a lower die seat, the top of the base is provided with a jacking and mold taking mechanism, and the top of the fixed seat is provided with a balancing mechanism.

[0007] The jacking and mold taking mechanism comprises a first fixed frame, the inner wall of the first fixed frame is rotationally connected with a bidirectional screw rod on the left and right sides, a servo motor is fixedly connected to the right side of the first fixed frame, limit rods are fixedly and symmetrically connected to the inner wall of the first fixed frame on the left and right sides and forward and backward, moving blocks are symmetrically and threadedly connected to the surface of the bidirectional screw rod, a first hinged frame is fixedly and symmetrically connected to the top of the two moving blocks forward and backward, a hinged rod is hingedly connected to the first hinged frame, a second hinged frame is hingedly connected to the other end of the hinged rod, a lifting plate is fixedly connected to the top of the second hinged frame, slide rods are fixedly and symmetrically connected to the top of the lifting plate forward and backward and left and right, and an inner mold plate is fixedly connected to the top end of the four slide rods.

[0008] Preferably, the right end of the bidirectional screw rod is fixedly connected to the output end of the servo motor, a hole matched with the limit rod is formed in the left side of the moving block, and the moving block is slidably connected to the surface of the limit rod through the hole, the limit rod limits the two moving blocks, and the two moving blocks move towards each other with the rotation of the bidirectional screw rod.

[0009] Preferably, a hole matched with the slide rod is formed in the bottom of the lower mold base, and the surface of the slide rod penetrates through the hole and is slidably connected to the hole.

[0010] Preferably, the balance mechanism comprises slide sleeves, the slide sleeves are fixedly and symmetrically connected to the top of the fixed seat near the front face, cylindrical racks are slidably connected to the inner walls of the two slide sleeves upward and downward, a second fixed frame is fixedly connected to the top of the fixed seat near the front face, shafts are arranged on the inner walls of the second fixed frame on the left and right sides and near the top, and gears are fixedly and symmetrically connected to the surfaces.

[0011] Preferably, a hole matched with the cylindrical rack is formed in the top of the fixed seat near the front face, and the surface of the cylindrical rack penetrates through the hole and is slidably connected to the hole upward and downward, and the bottom end of the cylindrical rack is fixedly connected to the top of the upper mold base near the front face.

[0012] Preferably, holes matched with the shafts are formed in the inner walls of the second fixed frame on the left and right sides and near the top, and the surface of the shaft penetrates through the hole and is rotationally connected to the hole.

[0013] Preferably, the gears are engaged with the racks, the balance mechanism has two groups, and is arranged on the top of the fixed seat forward and backward symmetrically, the balance mechanism balances the upper mold base, so that the upper mold base does not tilt in the lifting process.

[0014] Compared with the prior art, the present application provides a precise mold suitable for plastic product production, which has the following beneficial effects:

[0015] Compared with the traditional manual mold taking or the complex demolding structure, the mechanical transmission jacking mode has high automation degree, can quickly and accurately eject the formed plastic product from the lower mold base, improves the mold taking efficiency, reduces the labor intensity and production cost, and reduces the product damage risk caused by improper manual operation.

[0016] The precision mold suitable for plastic product production, in the balance mechanism, the meshing transmission of the cylindrical rack and the gear, in cooperation with the sliding sleeve sliding constraint of the cylindrical rack, when the upper mold base is driven to rise and fall by the hydraulic cylinder, the two groups of balance mechanisms symmetrically arranged in front and back can balance and adjust the upper mold base in real time. Even when the mold bears uneven pressure or runs at high speed, the upper mold base can be effectively prevented from tilting, the stability of the mold in the mold opening and closing process is ensured, the service life of the mold is prolonged, and reliable guarantee is provided for the forming quality of the plastic product, and the problems of product size deviation, surface defects and the like caused by mold shaking are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiment description will be simply introduced, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor:

[0018] Figure 1 It is the structure three-dimensional schematic diagram of the utility model;

[0019] Figure 2 It is the structure three-dimensional schematic diagram of the utility model jacking mold taking mechanism;

[0020] Figure 3 It is the structure lower mold base front cross-sectional three-dimensional schematic diagram of the utility model;

[0021] Figure 4 It is the structure three-dimensional schematic diagram of the utility model balance mechanism.

[0022] In the figure: 1, base; 2, first fixed rod; 3, fixed seat; 4, hydraulic cylinder; 5, upper die holder; 6, second fixed rod; 7, lower die holder; 8, lifting and mold taking mechanism; 81, first fixed frame; 82, bidirectional screw rod; 83, servo motor; 84, limit rod; 85, moving block; 86, first hinged frame; 87, hinged rod; 88, second hinged frame; 89, lifting plate; 811, sliding rod; 812, inner mold plate; 9, balancing mechanism; 91, sliding sleeve; 92, cylindrical rack; 93, second fixed frame; 94, rotating shaft; 95, gear. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0025] The present application provides the following technical solutions: Embodiment one

[0026] Please refer to Figures 1-3 The present application provides a technical solution: a precision mold suitable for plastic product production, comprising a base 1, the top of the base 1 is fixedly connected with four first fixed rods 2 symmetrically in front and back and left and right, the top ends of the four first fixed rods 2 are fixedly connected with fixed seats 3, the top of each fixed seat 3 is fixedly connected with a hydraulic cylinder 4, the output end of each hydraulic cylinder 4 is connected with an upper die holder 5, the top of the base 1 is fixedly connected with four second fixed rods 6 symmetrically in front and back and left and right, the top ends of the four second fixed rods 6 are connected with lower die holders 7, the top of the base 1 is provided with a lifting and mold taking mechanism 8, and the top of each fixed seat 3 is provided with a balancing mechanism 9;

[0027] The jacking and mold taking mechanism 8 comprises a first fixed frame 81, both sides of the inner wall of the first fixed frame 81 are rotationally connected with a bidirectional screw rod 82, the right side of the first fixed frame 81 is fixedly connected with a servo motor 83, the inner wall of the first fixed frame 81 is fixedly connected with a limiting rod 84 in a front-to-back symmetrical manner, the surface of the bidirectional screw rod 82 is symmetrically and threadedly connected with a moving block 85, the top of the two moving blocks 85 is fixedly connected with a first hinged frame 86 in a front-to-back symmetrical manner, the first hinged frame 86 is hingedly connected with a hinge rod 87, the other end of the hinge rod 87 is hingedly connected with a second hinged frame 88, the top of the second hinged frame 88 is fixedly connected with a lifting plate 89, and the top of the lifting plate 89 is fixedly connected with a slide rod 811 in a front-to-back and left-to-right symmetrical manner, and the top of the four slide rods 811 is fixedly connected with an inner mold plate 812.

[0028] The right end of the bidirectional screw rod 82 is fixedly connected to the output end of the servo motor 83, the left side of the moving block 85 is provided with a hole matched with the limiting rod 84, and the moving block 85 is slidably connected to the surface of the limiting rod 84 through the hole, the limiting rod 84 limits the two moving blocks 85, and the two moving blocks 85 move towards each other with the rotation of the bidirectional screw rod 82.

[0029] The bottom of the lower mold base 7 is provided with a hole matched with the slide rod 811, and the surface of the slide rod 811 penetrates and is slidably connected in the hole, and the surface of the inner mold plate 812 is slidably connected in the lower mold base 7. Embodiment two

[0030] Please refer to Figure 4 , and on the basis of embodiment one, a balancing mechanism 9 is further obtained.

[0031] The balancing mechanism 9 comprises slide sleeves 91, the slide sleeves 91 are fixedly connected to the top of the fixed seat 3 near the front face in a left-to-right symmetrical manner, the inner walls of the two slide sleeves 91 are slidably connected with a cylindrical rack 92, the top of the fixed seat 3 near the front face is fixedly connected with a second fixed frame 93, the inner walls of the second fixed frame 93 are provided with rotation shafts 94 near the top on both sides, and the surface is fixedly connected with a gear 95 in a left-to-right symmetrical manner.

[0032] The top of the fixed seat 3 near the front face is provided with a hole matched with the cylindrical rack 92, and the surface of the cylindrical rack 92 penetrates and is slidably connected in the hole, and the bottom end of the cylindrical rack 92 is fixedly connected to the top of the upper mold base 5 near the front face.

[0033] The inner walls of the second fixed frame 93 near the top on both sides are provided with holes matched with the rotation shafts 94, and the surfaces of the rotation shafts 94 penetrate and are rotationally connected in the holes.

[0034] The gear 95 is engaged with the rack, the balancing mechanism 9 has two groups, and is provided on the top of the fixed seat 3 in a front-to-back symmetrical manner, the balancing mechanism 9 balances the upper mold base 5, so that the upper mold base 5 does not tilt in the lifting process.

[0035] In actual operation, when the device is in use, the lower die holder 7 is fixed to the top of the base 1 by the four second fixing rods 6, and the upper die holder 5 is connected to the output end of the hydraulic cylinder 4, in the raised state. When the production of plastic products is needed, the hydraulic cylinder 4 is started, and its output end drives the upper die holder 5 to move downward until the lower die holder 7 and the upper die holder 5 are closed to form a complete mold cavity. At this time, the molten plastic raw material is injected into the mold cavity, and after the plastic cools and solidifies, the preliminary forming of the plastic product is completed. After the plastic product is formed, the servo motor 83 starts to work, and its output end drives the bidirectional screw rod 82 to rotate. Because the threads on the left and right sides of the bidirectional screw rod 82 are opposite in direction, and the moving block 85 is limited in movement direction by the sliding connection with the limiting rod 84, the two moving blocks 85 will move towards each other with the rotation of the bidirectional screw rod 82. The first hinged frame 86 on the top of the moving block 85 is connected to the second hinged frame 88 through the hinged rod 87, and when the moving block 85 moves towards each other, the hinged rod 87 pushes the second hinged frame 88 to drive the lifting plate 89 to rise. The sliding rod 811 on the top of the lifting plate 89 passes through the hole in the bottom of the lower die holder 7, and the inner mold plate 812 is pushed up to eject the formed plastic product from the lower die holder 7, realizing the automatic mold taking process;

[0036] During the lifting of the upper die holder 5 by the hydraulic cylinder 4, the balance mechanism 9 plays a role to ensure the stable operation of the upper die holder 5. When the hydraulic cylinder 4 pushes the upper die holder 5 to descend, the upper die holder 5 drives the cylindrical rack 92 connected thereto to slide downward in the sliding sleeve 91. Because the cylindrical rack 92 is engaged with the gear 95, the downward movement of the cylindrical rack 92 will drive the gear 95 to rotate around the rotating shaft 94, forming a linkage with the cylindrical rack 92 on the other side. When one side of the upper die holder 5 appears a slight inclination trend due to uneven force, the movement distance of the cylindrical rack 92 on this side will be different from that on the other side, and then the movement of the cylindrical rack 92 on both sides is adjusted through the transmission of the gear 95, so that the force on both sides of the upper die holder 5 tends to be balanced, preventing the upper die holder 5 from tilting during lifting. The two groups of balance mechanisms 9 arranged symmetrically in front and back work together to further enhance the balance adjustment ability of the upper die holder 5 and ensure the stability of the mold operation.

[0037] It is to be noted that, as used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" can include a combination of two or more components. Additionally, the terms "comprise," "comprises," and "comprising," or any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, unless otherwise indicated herein, the terms "first," "second," "third," etc., are used herein merely as labels, and are not intended to impose ordinal import.

Claims

1. A precision mold suitable for the production of plastic products, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected with four first fixing rods (2) symmetrically in front and back and left and right, the top ends of the four first fixing rods (2) are fixedly connected with fixing seats (3), the top of the fixing seat (3) is fixedly connected with a hydraulic cylinder (4), the output end of the hydraulic cylinder (4) is connected with an upper die seat (5), the top of the base (1) is fixedly connected with four second fixing rods (6) symmetrically in front and back and left and right, the top ends of the four second fixing rods (6) are connected with a lower die seat (7), the top of the base (1) is provided with a jacking and die taking mechanism (8), and the top of the fixing seat (3) is provided with a balancing mechanism (9). The jacking and die taking mechanism (8) comprises a first fixing frame (81), the inner walls of the first fixing frame (81) are rotatably connected with bidirectional screws (82) on the left and right sides, the right side of the first fixing frame (81) is fixedly connected with a servo motor (83), the inner walls of the first fixing frame (81) are fixedly connected with limiting rods (84) symmetrically in front and back on the left and right sides, the surfaces of the bidirectional screws (82) are symmetrically and threadedly connected with moving blocks (85), the top of the two moving blocks (85) is fixedly connected with first hinged frames (86) symmetrically in front and back, the first hinged frames (86) are hingedly connected with a hinged rod (87), the other end of the hinged rod (87) is hingedly connected with a second hinged frame (88), the top of the second hinged frame (88) is fixedly connected with a lifting plate (89), the top of the lifting plate (89) is fixedly connected with slide rods (811) symmetrically in front and back and left and right, and the top ends of the four slide rods (811) are fixedly connected with inner die plates (812). The balancing mechanism (9) comprises slide sleeves (91), the slide sleeves (91) are fixedly connected to the top of the fixing seat (3) symmetrically on the left and right near the front face, the inner walls of the two slide sleeves (91) are slidably connected with cylindrical racks (92), the top of the fixing seat (3) is fixedly connected with a second fixing frame (93) near the front face, the inner walls of the second fixing frame (93) are provided with rotating shafts (94) near the top on the left and right sides, and the surfaces of the second fixing frame (93) are fixedly connected with gears (95) symmetrically on the left and right.

2. The precision mold for producing plastic products according to claim 1, wherein: The right end of the bidirectional screw (82) is fixedly connected to the output end of the servo motor (83), the left side of the moving block (85) is provided with a hole matched with the limiting rod (84), and the moving block (85) is slidably connected to the surface of the limiting rod (84) through the hole.

3. The precision mold for producing plastic products according to claim 1, wherein: The bottom of the lower die seat (7) is provided with a hole matched with the slide rod (811), and the surface of the slide rod (811) penetrates and is slidably connected in the hole.

4. The precision mold for producing plastic products according to claim 1, wherein: The top of the fixing seat (3) is provided with a hole matched with the cylindrical rack (92) near the front face, and the surface of the cylindrical rack (92) penetrates and is slidably connected in the hole.

5. The precision mold for producing plastic products according to claim 1, wherein: The inner walls of the second fixing frame (93) are provided with holes matched with the rotating shafts (94) near the top on the left and right sides, and the surfaces of the rotating shafts (94) penetrate and are rotatably connected in the holes.

6. The precision mold for producing plastic products according to claim 1, wherein: The gear (95) is engaged with a rack, the balancing mechanism (9) has two groups and is symmetrically arranged on the top of the fixed seat (3).

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