Injection mold for draw-bar box body

Abstract

The utility model relates to an injection mold for a draw-bar box body. The mold structurally comprises a movable mold body, a fixed mold body, piston blocks and a sealing block, the fixed mold body is arranged on one side of the movable mold body, air outlet holes are formed in the upper surface of the movable mold body at equal intervals, the piston blocks are installed in the air outlet holes, and by installing the piston blocks and the sealing block, the movable mold body is close to the fixed mold body, and the movable mold body and the fixed mold body are closed. When injection molding liquid is injected into the cavities of the movable mold body and the fixed mold body, the piston blocks and the sealing blocks move upwards along the air outlets, the piston blocks are far away from the top ends of the air outlets, the sealing blocks are located below the air outlets, air is exhausted from the air outlets, and after air in the cavities is exhausted, the piston blocks move upwards, and the lower surfaces of the sealing blocks are flush with the bottom ends of the air outlets. And cooling forming of the injection molding liquid is facilitated, it is guaranteed that no burrs are generated close to the surfaces of the air outlet holes, the sealing blocks move out of the air outlet holes, and the injection molding liquid entering the air outlet holes moves out of the air outlet holes.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to injection molds for trolley case bodies. Background Technology

[0002] Injection molds are key tools used in plastic injection molding processes. They mainly consist of a moving mold and a fixed mold. During operation, molten plastic is injected into the mold cavity. After cooling and solidification, the molded product is removed by a robotic arm. The design of injection molds needs to consider factors such as plastic properties, product structure, and precision requirements.

[0003] When using injection molds to process trolley case bodies, the fixed mold and moving mold need to be closed, and the injection molten plastic is sent into the mold cavity. After cooling and molding, the trolley case body is formed. During the process of the injection molten plastic entering the mold, the air in the mold cavity is discharged through the vent holes on the mold. The vent holes of existing injection molds lack an automatic sealing structure. When the air in the cavity is discharged, the injection molten plastic will enter the vent hole, causing the vent hole to be unable to discharge air normally. It will also cause burrs to appear on the surface of the trolley case body near the vent hole.

[0004] Therefore, in response to the above problems, a new injection mold for trolley case bodies is proposed. Utility Model Content

[0005] To overcome the problems existing in related technologies, this utility model provides an injection mold for a trolley case body, which can use a piston structure to expel air from the cavity when the injection liquid enters the mold, and block the air vent when the injection liquid is molding, thus preventing burrs from appearing on the surface of the trolley case body.

[0006] To achieve the above objectives, the first aspect of this utility model provides an injection mold for a trolley case body, comprising:

[0007] Moving mold body, fixed mold body, piston block and sealing block;

[0008] The moving mold body has a fixed mold body on one side. The upper surface of the moving mold body has equidistant air vents. A piston block is installed inside the air vent. Below the piston block is a sealing block located inside the air vent. The bottom end of the sealing block is in contact with the surface of the fixed mold body.

[0009] Furthermore, a threaded rod that engages with the inside of the piston block is fixedly connected to the top of the sealing block.

[0010] Furthermore, the moving mold body has symmetrical injection holes on its surface that communicate with the interior of the moving mold body. The injection holes are frustum-shaped and the inlet diameter of the injection holes is smaller than the outlet diameter of the injection holes.

[0011] Furthermore, the edge of the injection hole outlet is chamfered.

[0012] Furthermore, a fixed frame is fixedly connected to the upper surface of the moving mold body, and electric push rods are equidistantly installed on the fixed frame. The moving end of the electric push rod is fixedly connected to the upper surface of the piston block.

[0013] Furthermore, the multiple moving ends of the electric actuator retract sequentially from left to right.

[0014] Furthermore, the moving mold body has symmetrically opened positioning holes on its surface, and the fixed mold body has symmetrically fixedly connected positioning rods that pass through the positioning holes.

[0015] The technical solution provided by this utility model can include the following beneficial effects:

[0016] In this example, by installing a piston block and a sealing block, the moving mold body is brought close to the fixed mold body. The moving mold body and the fixed mold body are closed, and the injection molding liquid is injected into the cavity of the moving mold body and the fixed mold body. The piston block and the sealing block move upward along the vent hole. The piston block moves away from the top of the vent hole, and the sealing block is located below the vent hole. Air is discharged from the vent hole. After the air in the cavity is discharged, the piston block moves upward again. The lower surface of the sealing block is flush with the bottom of the vent hole, blocking the vent hole. This facilitates the cooling and molding of the injection molding liquid and ensures that no burrs are generated on the surface near the vent hole. The sealing block moves out of the vent hole, and the injection molding liquid that has entered the vent hole moves out of the vent hole.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0018] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0019] Figure 1 This is a schematic diagram of the mold-closing structure shown in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the moving mold body shown in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the piston block shown in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the injection hole structure shown in an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the electric push rod structure shown in an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the mold-separation structure shown in an embodiment of the present invention.

[0025] The correspondence between the labels and component names in the attached figures is as follows:

[0026] 1. Moving mold body; 2. Fixed mold body; 3. Piston block; 4. Sealing block; 5. Threaded rod; 6. Injection hole; 7. Fixing frame; 8. Electric push rod; 9. Positioning hole; 10. Positioning rod. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. The preferred embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. Although the preferred embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this utility model more thorough and complete, and to fully convey the scope of this utility model to those skilled in the art.

[0028] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0029] It should be understood that although the terms "first," "second," "third," etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] Designing an injection mold that allows for easy cleaning of the molten plastic inside the pores is currently the primary technical problem that engineers need to solve.

[0031] To address the aforementioned problems, this utility model provides an injection mold for a trolley case body. This structure utilizes a piston mechanism to expel air from the cavity when the injection liquid enters the mold, and blocks the air vent during the molding process to prevent burrs from appearing on the surface of the trolley case body.

[0032] The technical solution of the present invention (Embodiment 1) is described in detail below with reference to the accompanying drawings.

[0033] Figure 1 This is a schematic diagram of the mold-closing structure shown in an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the moving mold body shown in an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the piston block shown in an embodiment of the present invention; Figure 4 This is a schematic diagram of the injection hole structure shown in an embodiment of the present invention; Figure 5 This is a schematic diagram of the electric push rod structure shown in an embodiment of the present invention; Figure 6 This is a schematic diagram of the mold-separation structure shown in an embodiment of the present invention.

[0034] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The suitcase body is made using injection molding, specifically including:

[0035] Moving mold body 1, fixed mold body 2, piston block 3, and sealing block 4;

[0036] The moving mold body 1 has a fixed mold body 2 on one side. The upper surface of the moving mold body 1 has equidistant air vents. A piston block 3 is installed inside the air vents. A sealing block 4 is located inside the air vents below the piston block 3. The bottom end of the sealing block 4 is in contact with the surface of the fixed mold body 2.

[0037] Specifically, the top of the sealing block 4 is fixedly connected to a threaded rod 5 that engages with the inside of the piston block 3.

[0038] Specifically, the surface of the moving mold body 1 is symmetrically provided with injection holes 6 that communicate with the interior of the moving mold body 1. The injection holes 6 are frustum-shaped, and the inlet diameter of the injection holes 6 is smaller than the outlet diameter of the injection holes 6.

[0039] Specifically, the edge of the injection hole 6 outlet is chamfered.

[0040] Specifically, a fixed frame 7 is fixedly connected to the upper surface of the moving mold body 1, and electric push rods 8 are installed at equal intervals on the fixed frame 7. The moving end of the electric push rod 8 is fixedly connected to the upper surface of the piston block 3.

[0041] Specifically, the moving ends of the plurality of electric push rods 8 retract sequentially from left to right.

[0042] Specifically, the moving mold body 1 has symmetrically opened positioning holes 9 on its surface, and the fixed mold body 2 has symmetrically fixedly connected positioning rods 10 that pass through the positioning holes 9.

[0043] In this embodiment, how to expel the air inside the cavities of the moving mold body 1 and the fixed mold body 2 and remove the injection liquid inside the vent holes, combined with... Figures 1 to 6 The specific implementation method is as follows: the moving mold body 1 is brought close to the fixed mold body 2, the positioning rod 10 enters the positioning hole 9, the moving mold body 1 and the fixed mold body 2 are closed, the injection molding liquid is injected into the cavity of the moving mold body 1 and the fixed mold body 2, the electric push rod 8 on the surface of the fixed frame 7 is activated, the moving end of the electric push rod 8 retracts, driving the piston block 3 and the sealing block 4 to move upward along the vent hole, the piston block 3 is away from the top of the vent hole, the sealing block 4 is located below the vent hole, the air is discharged from the vent hole, after the air in the cavity is discharged, the moving end of the electric push rod 8 continues to retract, the piston block 3 continues to move upward, the lower surface of the sealing block 4 is flush with the bottom of the vent hole, blocking the vent hole, which facilitates the cooling and molding of the injection molding liquid, and ensures that no burrs are generated on the surface near the vent hole. The moving end of the electric push rod 8 is completely retracted into the cavity, the sealing block 4 is moved out of the vent hole, and the injection molding liquid that has entered the vent hole is moved out of the vent hole, which facilitates the cleaning of the injection molding liquid inside the vent hole.

[0044] For example: How to clean the injection molding liquid adhering to the surface of piston block 3 and sealing block 4? Referring to the piston block 3 in the figure, the specific implementation method is as follows: rotate the sealing block 4, and the threaded rod 5 moves out of the piston block 3, separating the piston block 3 and sealing block 4, so as to facilitate cleaning the injection molding liquid adhering to the surface of piston block 3 and sealing block 4.

[0045] In this embodiment, how to quickly deliver the injection molding liquid into the cavity, combined with Figure 4 The injection molding liquid enters the cavity through two injection holes 6, allowing the injection molding liquid to fill the cavity from multiple directions simultaneously, improving the filling speed and uniformity. The frustum shape and chamfer design ensure that the injection molding liquid maintains a stable flow rate when entering the cavity.

[0046] In this embodiment, how to ensure uniform exhaust, combined with Figure 5 The specific implementation method is as follows: the electric push rods 8 retract one by one, and the sealing blocks 4 close the exhaust holes one by one to ensure that the air and the gas volatilized from the injection liquid in the cavity can be discharged smoothly. When the exhaust holes are closed at the same time, the gas in some areas cannot be discharged in time, which will affect the product quality and cause pores and bubbles to appear on the product surface.

[0047] The present invention has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to the present invention. Furthermore, it is understood that the steps in the method of the present invention embodiments can be adjusted, combined, and deleted according to actual needs, and the structure in the device of the present invention embodiments can be combined, divided, and deleted according to actual needs.

[0048] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An injection mold for a suitcase body, characterized in that, include: Moving mold body (1), fixed mold body (2), piston block (3) and sealing block (4); The moving mold body (1) has a fixed mold body (2) on one side. The upper surface of the moving mold body (1) has equidistant air vents. A piston block (3) is installed inside the air vent. A sealing block (4) is located inside the air vent below the piston block (3). The bottom end of the sealing block (4) is in contact with the surface of the fixed mold body (2).

2. The injection mold for the body of a trolley case according to claim 1, characterized in that: The top of the sealing block (4) is fixedly connected to a threaded rod (5) that meshes with the inside of the piston block (3).

3. The injection mold for the body of a trolley case according to claim 1, characterized in that: The moving mold body (1) has symmetrical injection holes (6) that communicate with the interior of the moving mold body (1). The injection holes (6) are frustum-shaped and the inlet diameter of the injection holes (6) is smaller than the outlet diameter of the injection holes (6).

4. The injection mold for the body of a trolley case according to claim 3, characterized in that: The injection hole (6) has a chamfered edge at the outlet edge.

5. The injection mold for the body of a trolley case according to claim 1, characterized in that: A fixed frame (7) is fixedly connected to the upper surface of the moving mold body (1), and electric push rods (8) are installed at equal intervals on the fixed frame (7). The moving end of the electric push rod (8) is fixedly connected to the upper surface of the piston block (3).

6. The injection mold for the body of a trolley case according to claim 5, characterized in that: The moving ends of the multiple electric push rods (8) retract sequentially from left to right.

7. The injection mold for the body of a trolley case according to claim 1, characterized in that: The moving mold body (1) has symmetrically opened positioning holes (9) on its surface, and the fixed mold body (2) has symmetrically fixedly connected positioning rods (10) that pass through the positioning holes (9).

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