A mold automatically compensating for product height deviation

Abstract

The application discloses a mold capable of automatically compensating product height deviation, and relates to the technical field of mold processing.The mold comprises a lower mold fixed plate, the top of the lower mold fixed plate is provided with mold feet on both sides, the top of the mold feet is provided with a B plate, the top of the lower mold fixed plate is provided with two or more B plate support columns, the top of the B plate support column is in contact with the bottom of the B plate, the outer surface of the B plate support column penetrates a top pin lower plate and a top pin upper plate, the bottom of the top pin upper plate is fixedly connected with the top of the top pin lower plate, the top of the top pin upper plate is provided with a top pin spring at four corners, and the top of the top pin spring is in contact with the bottom of the B plate.Through the design, the mold core connecting rod, the top pin upper plate, the top pin lower plate, the mold core support rod, the mold core movable block and the movable mold core can solve the injection molding defects caused by the height deviation of two iron cores during the injection molding of the motor rotor iron core, so that the product quality problems caused by the height deviation of the motor rotor iron core are avoided.

Description

Technical Field

[0001] This invention relates to the field of mold processing, and in particular to a mold that automatically compensates for product height deviations. Background Technology

[0002] Plastic molds are tools used in the plastics processing industry, working in conjunction with plastic molding machines to give plastic products a complete shape and precise dimensions. Due to the wide variety of plastic types and processing methods, and the varying complexity of plastic molding machines and plastic products, plastic molds also come in a wide variety of types and structures.

[0003] Current motor rotor cores are made by embedding magnets and then injection molding, using plastic filler to fix the magnets to the core for industrial mass production. Since motor rotor cores are composed of multiple layers of laminated silicon steel sheets, variations in the thickness of these sheets can result in a height deviation of 0.1~0.8mm even for rotor cores with the same number of layers. Due to efficiency considerations, when producing two-in-one injection molded motor rotor cores, this height deviation can cause mold deformation and affect the injection molding quality of the product. To address these issues, a mold with automatic height compensation for motor rotor core height deviation has been proposed to effectively resolve the adverse consequences of this problem.

[0004] The drawbacks of traditional single-outlet, double-injection molded motor rotor cores:

[0005] Traditional injection molds, as shown in the attached diagram, have plate A (Figure 12) and plate B (Figure 13) as the parting surface. The injection-molded motor rotor core is placed inside the cavity of plate B (Figure 13). Injection begins after plates A (Figure 12) and B (Figure 13) are closed and locked. The end face of plate A (Figure 12) is closed and locked with the motor rotor core to prevent the injection molding material from overflowing from the end face of the motor rotor core. Due to height deviation, when the height of the motor rotor core in the left cavity is higher than that of the motor rotor core in the right cavity, after the end face of the left motor rotor core is closed and locked with the end face of plate A (Figure 12), the end face of the right motor rotor core is not closed and locked with the end face of plate A (Figure 12) because the height of the right motor rotor core is lower than that of the left motor rotor core. This results in a defect of overflow of molding material on the end face of the right product during injection molding. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, the present invention solves the problem of injection molding defects caused by the height difference between the two iron cores during the injection molding of motor rotor iron core.

[0007] To solve the above technical problems, the present invention provides the following technical solution: a mold for automatically compensating for product height deviation, comprising a lower mold fixing plate, mold feet fixedly provided on both sides of the top of the lower mold fixing plate, a B plate fixedly provided on the top of the mold feet, two or more B plate support columns fixedly provided on the top of the lower mold fixing plate, and the top of the B plate support columns contacting the bottom of the B plate, the outer surface of the B plate support columns penetrating the lower ejector plate and the upper ejector plate, and the bottom of the upper ejector plate being fixedly connected to the top of the lower ejector plate, ejector springs fixedly provided at the four corners of the top of the upper ejector plate, and the top of the ejector springs contacting the bottom of the B plate, two symmetrical mold core connecting rods fixedly provided on the lower mold fixing plate, and the mold core connecting rods being fixedly connected to the lower ejector plate, an A plate provided on the top of the B plate, a pull plate fixedly provided on the top of the A plate, an upper mold fixing plate fixedly provided on the top of the pull plate, and an upper mold core fixedly provided on the bottom of the pull plate, the B plate being fixedly provided on the top of the upper mold fixing plate, the B plate being fixedly provided on the bottom of the pull plate, the B plate being fixedly provided on the top of the upper mold fixing plate, and the B plate being fixedly provided on the bottom of the upper mold fixing plate, ... A movable mold core block is provided at the bottom of the plate. A movable mold core is fixedly provided at the top of the movable mold core block. An iron core is provided at the top of the movable mold core, and the iron core is tightly fitted with the upper mold core. A mold core support rod is fixedly provided at the lower end face of the movable mold core block. The other end of the mold core support rod passes through plate B and is fixed to the upper end face of the ejector plate.

[0008] As a preferred embodiment of the present invention, a mold positioning ring is fixedly provided on the top of the upper mold fixing plate, and a sprue sleeve is provided inside the mold positioning ring, and the sprue sleeve is interconnected with the upper mold fixing plate, the pull plate, and the upper mold core.

[0009] As a preferred embodiment of the present invention, the lower end face of the mold core connecting rod is not higher than the lower end face of the lower mold fixing plate, and the mold core connecting rod is connected and in contact with the piston rod end face of the independent oil cylinder, and the mold core connecting rod is driven to rise or fall by the independent oil cylinder, thereby compensating for the height error of the iron core.

[0010] As a preferred embodiment of the present invention, the contact surfaces of plate A and plate B are locked by the injection molding machine's clamping mechanism.

[0011] As a preferred embodiment of the present invention, the B plate has two symmetrical chambers inside, and each chamber holds an iron core.

[0012] Compared with the prior art, the beneficial effects that this invention can achieve are:

[0013] 1. Through this design, the height deviation between the two iron cores during injection molding of the motor rotor iron core can be resolved by utilizing the connecting rod, upper ejector plate, lower ejector plate, mold core support rod, movable block, and movable mold core.

[0014] This eliminates injection molding defects and avoids product defects caused by height deviations in the motor rotor core. Attached Figure Description

[0015] Figure 1 is a front view of the structure of the present invention;

[0016] Figure 2 is a rear cross-sectional view of the structure of Figure 1 of the present invention;

[0017] Figure 3 is a top view cross-sectional structural diagram of the present invention as shown in Figure 1.

[0018] The components are: 1. Mold core connecting rod; 2. Mold core support rod; 3. B plate support column; 4. Mold core movable block; 5. Movable mold core; 6. Iron core; 7. Sprue bushing; 8. Mold positioning ring; 9. Upper mold core; 10. Upper mold fixing plate; 11. Pull plate; 12. A plate; 13. B plate; 14. Mold foot; 15. Ejector spring; 16. Ejector upper plate; 17. Ejector lower plate; 18. Lower mold fixing plate. Detailed Implementation

[0019] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0020] Example:

[0021] As shown in Figures 1-3, a mold for automatically compensating for product height deviation includes a lower mold fixing plate 18. Mold feet 14 are fixedly mounted on both sides of the top of the lower mold fixing plate 18. A B plate 13 is fixedly mounted on the top of the mold feet 14. Two or more B plate support columns 3 are fixedly mounted on the top of the lower mold fixing plate 18, with the top of the B plate support columns 3 contacting the bottom of the B plate 13. The outer surface of the B plate support columns 3 penetrates the lower ejector plate 17 and the upper ejector plate 16, with the bottom of the upper ejector plate 16 fixedly connected to the top of the lower ejector plate 17. Ejector springs 15 are fixedly mounted at the four corners of the top of the upper ejector plate 16, with the top of the ejector springs 15 contacting the bottom of the B plate 13. Two symmetrical mold core connecting rods 1 are fixedly mounted on the lower mold fixing plate 18, and the mold core connecting rods 1 are fixedly connected to the lower ejector plate 17. An A plate 12 is provided on the top of the B plate 13. A pull plate 11 is fixedly installed at the top of the plate 13, and an upper mold fixing plate 10 is fixedly installed at the top of the pull plate 11. An upper mold core 9 is fixedly installed at the bottom of the pull plate 11. A mold core movable block 4 is provided at the bottom of the inner part of the B plate 13. A movable mold core 5 is fixedly installed at the top of the movable mold core 4. An iron core 6 is provided at the top of the movable mold core 5, and the iron core 6 is tightly fitted with the upper mold core 9. A mold core support rod 2 is fixedly installed on the lower end face of the movable mold core 4. The other end of the mold core support rod 2 passes through the B plate 13 and is fixed.

[0022] On the upper end face of the ejector plate 16; during the existing mold injection molding process, since the height of the cavity of plate B 13 is 0.3~0.5mm higher than the maximum value of the motor rotor core 6, the mold core movable block 4 and the movable mold core 5 are installed at the bottom of the mold cavity of plate B 13. At the same time, the upper end face of the mold core support rod 2 contacts the lower end face of the mold core movable block 4, and the other end of the mold core support rod 2 passes through the ejector plate 16 and contacts the upper end face of the ejector plate 17. The lower end face of the ejector plate 17 is connected to the mold core connecting rod 1, and the other end of the mold core connecting rod 1 extends into the through hole of the lower mold fixing plate 18. During operation, the motor rotor core 6 is placed into the two symmetrical cavities on the left and right sides of plate B 13. Plate A 12 and plate B 13 are closed and locked by the injection molding machine's clamping mechanism, ensuring complete fit of the mold parting line. The injection molding machine is equipped with two sets of independent hydraulic cylinders. The piston rods of the two sets of cylinders respectively abut against the lower end faces of the left and right mold core connecting rods 1. The two sets of cylinders can operate independently. When the piston rod of either cylinder extends upward, it can drive the corresponding side's ejector lower plate 17, ejector upper plate 16, mold core support rod 2, mold core movable block 4, movable mold core 5, and the iron core 6 on that side to move upward synchronously until the upper end face of the iron core on that side presses against the lower end face of the upper mold core 9. The left and right cavities are independently adjusted for support height by the two sets of cylinders to compensate for the height deviation of the iron core on one side, avoiding overflow defects caused by inconsistent heights of the two iron cores, until the upper end face of the motor rotor core 6 is flush with the upper mold core 9. The lower end face is closed and locked. After mold locking is completed, the injection molding material can be injected into the B plate 13 through the sprue sleeve 7 to begin molding. Since the two independent cavities are controlled by two independent hydraulic cylinders, the injection molding defects caused by the height deviation of the motor rotor core 6 are eliminated.

[0023] The mold positioning ring 8 is fixedly provided on the top of the upper mold fixing plate 10. The mold positioning ring 8 has a sprue sleeve 7 inside, and the sprue sleeve 7 is interconnected with the upper mold fixing plate 10, the pull plate 11, and the upper mold core 9.

[0024] The lower end face of the mold core connecting rod 1 is not higher than the lower end face of the lower mold fixing plate 18, and the mold core connecting rod 1 is in contact with the piston rod end face of the independent oil cylinder. The mold core connecting rod 1 is driven to rise or fall by the independent oil cylinder, thereby compensating for the height error of the iron core 6. By setting two independent oil cylinders, the piston rod on the oil cylinder can move the mold core connecting rod 1 upward to adjust the height of the iron core 6.

[0025] The contact surfaces of plate A 12 and plate B 13 are locked by the injection molding machine's clamping mechanism. This clamping mechanism is existing technology, which can fix the closed plate A 12 and plate B 13, bringing stability and convenience to subsequent injection molding.

[0026] The B plate 13 has two symmetrical chambers inside, and each chamber holds an iron core 6.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as defined by the appended claims and their equivalents.

Claims

1. A mold for automatically compensating for product height deviation, comprising a lower mold fixing plate (18), characterized in that: The lower mold fixing plate (18) is fixed with mold feet (14) on both sides of the top. The mold feet (14) are fixed with B plate (13) on the top. The lower mold fixing plate (18) is fixed with two or more B plate support columns (3), and the top of the B plate support column (3) is in contact with the bottom of the B plate (13). The outer surface of the B plate support column (3) penetrates the lower ejector plate (17) and the upper ejector plate (16), and the bottom of the upper ejector plate (16) is fixedly connected to the top of the lower ejector plate (17). The four corners of the top of the upper ejector plate (16) are fixed with ejector springs (15), and the top of the ejector springs (15) is in contact with the bottom of the B plate (13). The lower mold fixing plate (18) is fixed with two symmetrically arranged mold core connecting rods (1), and the two mold core connecting rods (1) are respectively fixedly connected to the ejector pin lower plate (17); The B plate (13) has two symmetrical cavities inside, and each cavity has a core movable block (4) on its bottom surface. The top of the core movable block (4) is fixedly provided with a movable mold core (5), and an iron core (6) is placed on the top of the movable mold core (5). The iron core (6) is in close contact with the upper mold core (9). The lower end face of the core movable block (4) is fixedly provided with a core support rod (2), and the other end of the core support rod (2) passes through the B plate (13) and is fixed to the upper end face of the ejector plate (16). The top of the B plate (13) is provided with an A plate (12), the top of the A plate (12) is fixedly provided with a pull plate (11), the top of the pull plate (11) is fixedly provided with an upper mold fixing plate (10), and the bottom of the pull plate (11) is fixedly provided with an upper mold core (9). The top of the upper mold fixing plate (10) is fixedly provided with a mold positioning ring (8), and the mold positioning ring (8) is provided with a sprue sleeve (7), and the sprue sleeve (7) is interconnected with the upper mold fixing plate (10), the pull plate (11), and the upper mold core (9); The lower end face of the mold core connecting rod (1) is not higher than the lower end face of the lower mold fixing plate (18); the mold is equipped with two sets of independent oil cylinders, and the two symmetrical mold core connecting rods (1) correspond to a set of independent oil cylinders respectively. The piston rod end face of each set of independent oil cylinders abuts against the lower end face of the corresponding mold core connecting rod (1); each set of independent oil cylinders can drive the corresponding mold core connecting rod (1) to rise or fall, independently adjust the support height of the single-sided cavity iron core (6), and compensate for the height error of the corresponding iron core (6).

2. The mold for automatically compensating for product height deviation according to claim 1, characterized in that: The contact surfaces of plate A (12) and plate B (13) are locked by the injection molding machine clamping mechanism.

3. The mold for automatically compensating for product height deviation according to claim 1, characterized in that: The B plate (13) has two symmetrical chambers inside, and each chamber holds an iron core (6).

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