Core pulling mechanism of plastic package mold

Abstract

The utility model discloses a core-pulling mechanism of a plastic package mold, which relates to the field of plastic package molds, and is characterized by comprising a driving oil cylinder arranged on the plastic package mold, a core-pulling driving large plate is fixedly connected to a transmission part of the driving oil cylinder, the core-pulling driving large plate is connected with a core-pulling needle fixing plate through a connecting piece, and the core-pulling needle fixing plate is connected with a core-pulling needle. During use, the large core-pulling driving plate is pushed upwards through the driving oil cylinder, so that the core-pulling needle upwards abuts against a base island of a product, and the effect is that a set of movable ejector pin mechanism is additionally arranged in an existing mold structure, extends into a body of the product and can provide support for the base island during packaging, so that the product is prevented from being damaged, the production efficiency is improved, and the production cost is reduced. And the position of the base island in the mold is kept unchanged. And before injection molding is completed, the ejector pin mechanism retreats, and the ejector pin retreats from the cavity to keep the integrity of the product appearance.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of plastic package mould, more specifically, it relates to a core pulling mechanism of plastic package mould. BACKGROUND

[0002] In the new energy and white household appliance industry, the requirements for the heat dissipation, high voltage breakdown prevention and other aspects of power management integrated circuit products are very high. In terms of products, it is required that the base island inside the product remains unchanged during the plastic packaging operation. Due to vibration and other reasons during the actual product turnover process, the base island position deforms to varying degrees. The existing structure of the plastic packaging mold is that the base island is in a suspended state in the mold, which cannot provide physical support for maintaining the position of the base island.

[0003] However, without providing support for the base island, in addition to the deformation of the incoming base island, the injection force during packaging also increases the deformation of the base island, causing the edge of the base island to be too close to the packaging body. In the sealing test, the gap caused by deformation destroys the original sealing structure, ultimately leading to product failure in these tests. In severe cases, the deformation cannot be repaired and the product can only be scrapped, which not only reduces production efficiency but also increases production cost.

[0004] Therefore, in order to solve the above technical problems, the core pulling mechanism of the plastic packaging mold is provided. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a core pulling mechanism of a plastic packaging mold.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a core pulling mechanism of a plastic packaging mold, comprising a driving oil cylinder arranged on the plastic packaging mold, a core pulling driving large plate fixedly connected to the transmission part of the driving oil cylinder, a core pulling needle fixing plate connected to the core pulling driving large plate through a connecting piece, and a core pulling needle installed on the top of the core pulling needle fixing plate. When in use, the core pulling driving large plate is pushed upward by the driving oil cylinder, so that the core pulling needle pushes upward against the base island of the product.

[0007] Preferably, the connecting piece comprises a plurality of connecting rods fixed to the core pulling driving large plate, the head of the connecting rod is fixedly connected with a pulling block, and the core pulling needle fixing plate is arranged between the two pulling blocks.

[0008] Preferably, the two sides of the core pulling needle fixing plate are provided with protruding parts, and recessed parts matched with the protruding parts are formed on the contact surface of the pulling block and the core pulling needle fixing plate, so as to stably limit the core pulling needle fixing plate between the two pulling blocks. After limiting, the pulling block and the core pulling needle fixing plate are fixed by screws.

[0009] Preferably, the driving oil cylinder is mounted on the plastic sealing external frame of the mold, and the piston rod is connected with the core pulling driving plate through the reserved hole or notch on the mold.

[0010] Preferably, the bottom end of the core pulling needle is processed with external threads, and the inner side of the corresponding mounting hole of the core pulling needle fixing plate is processed with internal threads, so that the two are connected through threads.

[0011] Preferably, the number of the driving oil cylinder is two, which are distributed on both sides of the bottom of the core pulling driving plate.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The utility model discloses a movable ejector pin mechanism is added in the existing mold structure, and the movable ejector pin mechanism is inserted into the product body, can provide support for the base island when packaging, and keeps the position of the base island unchanged in the mold.

[0014] 2. The utility model discloses that the protruding part and the recessed part are closely contacted, and the accurate positioning of the core pulling needle fixing plate between the two pulling blocks can be realized. Figure One The cooperation mode of this mechanical structure is like jigsaw, and the relative position between parts is more accurate. In the injection mold, the accurate positioning can ensure that the core pulling needle accurately pushes against the base island of the product, and effectively prevents problems such as back glue overflow caused by position deviation.

[0015] 3. The utility model discloses that the driving oil cylinder is mounted on the plastic sealing external frame of the mold, and the piston rod is connected with the core pulling driving plate through the reserved hole or notch on the mold. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings described herein are used to provide further understanding of the utility model and constitute a part of the application. The schematic embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0017] Figure 1 It is the overall structure schematic diagram of the utility model;

[0018] Figure 2 It is the overall structure schematic diagram of the utility model; Figure 1

[0019] Figure 3 It is the schematic diagram of the core pulling mechanism in the extended state.​

[0020] Figure 4 The drawing shows the core-pulling mechanism in the retracted state.

[0021] In the drawing: 1, driving oil cylinder; 2, core-pulling driving large plate; 3, connecting rod; 4, pulling block; 401, recessed part; 5, core-pulling needle fixing plate; 501, protruding part; 6, core-pulling needle; 7, base island. DETAILED DESCRIPTION

[0022] As Figures 1-4 shown, the utility model provides a kind of core-pulling mechanism of plastic package mould, including the driving oil cylinder 1 being arranged on plastic package mould, and the transmission part of driving oil cylinder 1 is fixedly connected with core-pulling driving large plate 2, and core-pulling driving large plate 2 is connected with core-pulling needle fixing plate 5 by connecting piece, and the top of core-pulling needle fixing plate 5 is equipped with core-pulling needle 6, when using, by driving oil cylinder 1, core-pulling driving large plate 2 is pushed upwards, so that core-pulling needle 6 is pushed upwards and holds the base island 7 of product.

[0023] Before injection molding starts, driving oil cylinder 1 extends, pushes core-pulling driving large plate 2 upwards, drives connecting piece to drive core-pulling needle fixing plate 5 to push upwards synchronously, and core-pulling needle fixing plate 5 drives core-pulling needle 6 to hold the base island 7 of product, supports base island 7, makes base island 7 adhere to upper cavity surface, prevents back overflow glue, before injection molding material completely solidifies, driving oil cylinder 1 is retracted, so as to drive core-pulling needle 6 to exit from cavity, using the characteristics that injection molding material is not completely solidified and can flow a little, the empty hole left after core-pulling needle 6 exits is filled, and the integrity of final product is ensured.

[0024] In summary, the utility model increases a set of movable ejector pin mechanism in the existing mould structure, extends into the body of product, can provide support for base island 7 when packaging, keeps the position of base island 7 unchanged in mould. Before injection molding is completed, the ejector pin mechanism is retracted, and the ejector pin is withdrawn from the cavity to maintain the integrity of the appearance of the product.

[0025] Further, the connecting piece includes a plurality of connecting rods 3 fixed to the core-pulling driving large plate 2, the head of the connecting rod 3 is fixedly connected with the pulling block 4, the core-pulling needle fixing plate 5 is arranged between the two pulling blocks 4, the two sides of the core-pulling needle fixing plate 5 are provided with protruding parts 501, and the contact surfaces of the pulling block 4 and the core-pulling needle fixing plate 5 are provided with recessed parts 401 matched with the protruding parts 501, so as to stably limit the core-pulling needle fixing plate 5 between the two pulling blocks 4. After limiting, the pulling block 4 and the core-pulling needle fixing plate 5 are fixed by screws. When limiting, the core-pulling needle fixing plate 5 is slid from the side edges of the two pulling blocks 4, so that the protruding parts 501 and the recessed parts 401 are in close contact, thereby limiting the core-pulling needle fixing plate 5. The precise positioning of the core-pulling needle fixing plate 5 between the two pulling blocks 4 can be realized. The cooperation mode of such mechanical structure is like puzzle Figure OneThe relative position between the components is more accurate, so that the core pulling needle 6 can accurately push against the base island 7 of the product, and effectively prevent problems such as back overflow caused by position deviation.

[0026] Moreover, the utility model discloses the drive oil jar 1 is installed on the plastic package outside frame of mould, and its piston rod is connected with the core pulling drive big board 2 through the reserved hole or slot on the mould, which makes the maintenance personnel can directly contact the drive oil jar 1 from the outside of the mould, compared with the case of installing in the complicated structure in the mould, this external installation mode avoids the trouble that needs to disassemble a large number of mould internal components to reach the drive oil jar 1, so that when the drive oil jar 1 is damaged, it is convenient to replace, and the up-down movement of the core pulling drive big board 2 is driven by two drive oil jars 1, and the two drive oil jars 1 are distributed on the two sides of the bottom of the core pulling drive big board 2, which can make the force applied to the core pulling drive big board 2 more uniform, and when the core pulling drive big board 2 is pushed to move upward, the driving force on the two sides can balance the gravity and resistance in the movement process of the core pulling drive big board 2 and its connecting components (such as connecting rod 3, pull block 4, core pulling needle fixing plate 5 and core pulling needle 6).

[0027] Finally, the utility model also provides the connecting mode between the core pulling needle 6 and the core pulling needle fixing plate 5, the bottom end of the core pulling needle 6 is processed external thread, and the inner side of the corresponding mounting hole in the core pulling needle fixing plate 5 is processed internal thread, so that the two are connected through thread, and the operator can install the core pulling needle 6 in place according to the specified torque requirement using appropriate tools (such as wrench). Compared with some installation modes such as complex welding, press fitting or glue bonding, the installation process of thread connection is more direct and convenient, and does not require special equipment or environmental conditions, which can improve the assembly efficiency of the plastic package mould.

[0028] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form; any ordinary technical personnel in the industry can implement the utility model according to the drawings and the above description; however, any equivalent changes, modifications and evolution of the above-mentioned technical contents within the scope of the technical scheme of the utility model can be made by the skilled person in the art, which are equivalent embodiments of the utility model; meanwhile, any equivalent changes, modifications and evolution of the above-mentioned technical contents within the scope of the technical scheme of the utility model are still within the protection scope of the utility model.

Claims

1. A core-pulling mechanism of a plastic encapsulation mold, comprising a driving oil cylinder (1) arranged on the plastic encapsulation mold, characterized in that: The transmission part of the driving oil cylinder (1) is fixedly connected with a core pulling driving plate (2), the core pulling driving plate (2) is connected with a core pulling needle fixing plate (5) through a connecting piece, the top of the core pulling needle fixing plate (5) is provided with a core pulling needle (6), and in use, the core pulling driving plate (2) is pushed upward through the driving oil cylinder (1), so that the core pulling needle (6) is pushed upward and abuts against the base island (7) of a product.

2. The core-pulling mechanism of a plastic packaging mold according to claim 1, wherein: The connecting piece comprises a plurality of connecting rods (3) fixed on the core pulling driving plate (2), the head of the connecting rod (3) is fixedly connected with a pulling block (4), and the core pulling needle fixing plate (5) is arranged between the two pulling blocks (4).

3. The core-pulling mechanism of a plastic packaging mold according to claim 2, wherein: The two sides of the core pulling needle fixing plate (5) are provided with protruding parts (501), and the contact surface of the pulling block (4) and the core pulling needle fixing plate (5) is provided with recessed parts (401) matched with the protruding parts (501), so that the core pulling needle fixing plate (5) is stably limited between the two pulling blocks (4), and after limiting, the pulling block (4) and the core pulling needle fixing plate (5) are fixed through screws.

4. The core-pulling mechanism of a plastic packaging mold according to claim 1, wherein: The driving oil cylinder (1) is installed on the plastic sealing outer frame of the mold, and the piston rod is connected with the core pulling driving plate (2) through the reserved hole or slot on the mold.

5. The core-pulling mechanism of a plastic packaging mold according to claim 1, wherein: The bottom end of the core pulling needle (6) is provided with external threads, and the inner side of the corresponding mounting hole in the core pulling needle fixing plate (5) is provided with internal threads, so that the two are connected through threads.

6. The core-pulling mechanism of a plastic packaging mold according to claim 1, wherein: The number of the driving oil cylinder (1) is two, and the two are distributed on the two sides of the bottom of the core pulling driving plate (2).

Images