Glue injection speed adjusting device of injection mold

Abstract

A glue injection speed adjusting device for an injection mold relates to the technical field of molds. Comprising an adjusting rack which is horizontally arranged at the side part of a glue injection channel in a sliding and sealing manner; comprising a cross section part and a tooth part which are sequentially connected; the adjusting gear is rotatably arranged on the injection mold and is meshed with the tooth part; and through rotation of the adjusting gear, the cross section part of the adjusting rack extends into the glue injection channel, and the cross section of the glue injection channel is adjusted. Specifically, the adjusting gear is adjustably and fixedly connected with the injection mold through a fastening bolt. Specifically, the adjusting rack is arranged in the injection mold in a sliding mode through a dovetail groove. The adjusting gear drives the adjusting rack to move left and right in the dovetail groove, and the size of the head of the adjusting rack in the glue injection channel can change the cross sectional area of the glue injection channel, so that the aims of adjusting the glue injection speed and dynamically adjusting the balance of the glue injection amount and the gas displacement under the set process condition are fulfilled; and the defects such as air holes of the injection-molded body are overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a glue injection speed regulating device for an injection mold. Background Art

[0002] For example, plastic-encapsulated semiconductors use thermosetting epoxy molding compound as the encapsulation material through injection molding. Strict requirements are placed on the appearance of the body, and common defects include body pores and defects.

[0003] Factors that affect the generation of pores and defects in the body after injection molding include mold temperature, mold exhaust groove size design and processing accuracy, mold temperature control system accuracy, preheating time, black glue waiting time after preheating, injection molding machine table flatness, injection molding machine rotation pressure, rotation speed, mold clamping pressure, epoxy molding compound flow length, gel time, etc.

[0004] When a fixed injection mold is used in the same injection molding machine, factors such as mold temperature, mold exhaust groove size design and processing accuracy, mold temperature control system accuracy, preheating time, black glue waiting time after preheating, injection molding machine table flatness, injection molding machine rotation pressure, rotation speed, and mold clamping pressure are no longer variables. The performance differences between batches of epoxy molding materials, that is, fluctuations in key performance parameters such as flow length and gel time, will affect the injection molding appearance. This needs to be solved by adjusting the injection speed. By adjusting the injection speed, the air inside the cavity is fully discharged before the cavity is filled, thereby improving the body's pores and defects. Utility Model Content

[0005] In view of the above problems, the utility model provides a device for adjusting the injection speed of a plastic injection mold which has a compact structure and is easy to adjust.

[0006] The technical solution of the utility model is: an injection mold injection speed regulating device, comprising:

[0007] The adjustment rack and the horizontal sliding seal are arranged on the side of the glue injection channel; the adjustment rack comprises a cross section and a tooth section connected in sequence;

[0008] The adjusting gear is rotatably arranged on the injection mold and meshes with the tooth portion; through the rotation of the adjusting gear, the cross-section of the adjusting rack is extended into the injection channel to adjust the cross section of the injection channel.

[0009] Specifically, the adjusting gear is adjustably fixedly connected to the injection mold via a fastening bolt.

[0010] Specifically, the adjustment rack is slidably arranged in the injection mold through a dovetail groove.

[0011] Specifically, a mounting cavity adapted to the adjustment rack is provided on the side of the glue injection channel in the injection mold.

[0012] Specifically, a sealing ring is provided between the installation cavity and the adjusting gear.

[0013] Specifically, the sealing ring is fixedly arranged on the inner wall of the installation cavity.

[0014] Specifically, a rotatable mounting position adapted to the adjusting gear is provided on the side of the mounting cavity;

[0015] The rotation mounting position is communicated with the mounting cavity and is used for engaging with the tooth portion.

[0016] The top surface of the adjusting gear is provided with a hexagonal groove for adjusting the rotation.

[0017] The utility model drives the adjusting rack to move left and right in the dovetail groove by adjusting the gear. The size of the rack head in the injection channel can be adjusted to change the cross-sectional area of ​​the injection channel, so as to achieve the purpose of adjusting the injection speed under given process conditions and dynamically adjusting the balance between the injection volume and the exhaust volume, thereby improving defects such as air holes in the body after injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 1. It is a structural diagram of the meshing state of the adjusting rack and the adjusting gear;

[0020] Figure 3 Schematic diagram of the connection structure between the adjustment rack and the injection mold;

[0021] In the figure, 100 is an injection mold.

[0022] 200 is the adjustment rack, 210 is the cross section, 220 is the tooth section,

[0023] 300 is the adjustment gear, 310 is the fastening bolt, 320 is the hexagonal slot,

[0024] 400 is the glue injection channel. DETAILED DESCRIPTION

[0025] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0026] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of this utility model. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation and are therefore not to be construed as limitations on this utility model. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0028] Reference below Figure 1-3 Describe the utility model;

[0029] The injection mold injection speed regulating device comprises:

[0030] The adjustment rack 200 is a horizontal sliding seal provided on the side of the glue injection channel 400; it comprises a cross-section portion 210 and a tooth portion 220 connected in sequence;

[0031] The adjusting gear 300 is rotatably arranged on the injection mold 100 and meshes with the tooth portion 220 ; by rotating the adjusting gear 300 , the cross-section 210 of the adjusting rack 200 is extended into the injection channel 400 to adjust the cross section of the injection channel 400 .

[0032] It is further defined that the adjusting gear 300 is adjustably fixedly connected to the injection mold 100 via a fastening bolt 310 .

[0033] When the fastening bolt 310 is tightened, the adjusting gear 300 is fixedly connected to the injection mold 100 and is in a locked state;

[0034] When the fastening bolt 310 is loosened, the adjusting gear 300 can rotate on the injection mold 100 to adjust the adjusting rack 200 .

[0035] The top surface of the adjusting gear 300 is provided with a hexagonal slot 320 for adjusting the rotation.

[0036] In this case, the adjusting gear 300 can be adjusted and rotated using an Allen wrench to drive the adjusting rack 200 to move left and right. After the adjustment purpose is achieved, the adjusting rack 200 can be fixed by tightening the bolts 310.

[0037] It is further defined that the adjustment rack 200 is slidably disposed in the injection mold 100 via a dovetail groove.

[0038] A mounting cavity adapted to the adjustment rack 200 is provided on the side of the glue injection channel 400 in the injection mold 100 .

[0039] The side of the installation cavity is provided with a rotation installation position adapted to the adjustment gear 300;

[0040] The rotational mounting position is communicated with the mounting cavity and is configured to engage with the tooth portion 220 .

[0041] It is further defined that a sealing ring is provided between the installation cavity and the adjusting gear 300 .

[0042] The sealing ring is fixedly arranged on the inner wall of the installation cavity to block the liquid material in the glue injection channel 400.

[0043] Regarding the content disclosed in this case, the following points need to be explained:

[0044] (1) The drawings of the embodiments disclosed in this case only involve the structures involved in the embodiments disclosed in this case. Other structures can refer to the general design;

[0045] (2) In the absence of conflict, the embodiments and features of the embodiments disclosed in this case may be combined with each other to form new embodiments;

[0046] The above are only specific implementation methods disclosed in this case, but the protection scope of this disclosure is not limited thereto. The protection scope disclosed in this case should be based on the protection scope of the claims.

Claims

1. An injection mold injection speed regulating device, characterized in that: include: The adjusting rack (200) is provided with a horizontal sliding seal on the side of the glue injection channel (400); it comprises a cross-section portion (210) and a tooth portion (220) connected in sequence; The adjusting gear (300) is rotatably arranged on the injection mold (100) and meshes with the toothed portion (220); through the rotation of the adjusting gear (300), the cross-section (210) of the adjusting rack (200) is extended into the injection channel (400) to adjust the cross section of the injection channel (400).

2. The injection mold injection speed regulating device according to claim 1, characterized in that: The adjusting gear (300) is adjustably fixedly connected to the injection mold (100) via a fastening bolt (310).

3. The injection mold injection speed regulating device according to claim 1, characterized in that: The adjusting rack (200) is slidably arranged in the injection mold (100) via a dovetail groove.

4. The injection mold injection speed regulating device according to claim 1, characterized in that: A mounting cavity adapted to the adjustment rack (200) is provided on the side of the glue injection channel (400) in the injection mold (100).

5. The injection mold injection speed regulating device according to claim 4, characterized in that: A sealing ring is provided between the installation cavity and the adjusting gear (300).

6. The injection mold injection speed regulating device according to claim 5, characterized in that: The sealing ring is fixedly arranged on the inner side wall of the installation cavity.

7. The injection mold injection speed regulating device according to claim 4, characterized in that: A rotatable mounting position adapted to the adjusting gear (300) is provided on the side of the mounting cavity; The rotational mounting position is in communication with the mounting cavity and is used for meshing with the toothed portion (220).

8. The injection mold injection speed regulating device according to claim 1, characterized in that: The top surface of the adjusting gear (300) is provided with a hexagonal groove (320) for adjusting the rotation.

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