Injection mold convenient to mold

Abstract

The injection mold comprises a top plate and a bottom plate, the bottom of the top plate is fixedly connected with a fixed mold, and the top of the bottom plate is fixedly connected with a movable mold. The utility model has the advantages that the synchronous injection molding of three pipes at different points is realized, and a plastic melt can enter a cavity from the three points at the same time, so that the filling speed is accelerated, and the molding period is shortened. Weld marks are reduced, and the weld marks can be reduced through synchronous injection molding. Weld marks are traces formed when plastic melts converge in a cavity and can affect the appearance and the mechanical performance of a plastic part. Through synchronous injection molding of the main injection pipe and the auxiliary injection pipe, plastic melt can be more uniformly distributed in the cavity, so that formation of weld marks is reduced. The plastic melt can be cooled and cured more uniformly in the cavity, so that shrinkage and deformation caused by non-uniform cooling are reduced, and the dimensional accuracy of a plastic part is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold that is easy to form. Background Technology

[0002] Injection molds are specialized tools used in the plastic injection molding process. They are required for the production of the housing or back cover of law enforcement recorders.

[0003] In the prior art, after the back shell of the law enforcement recorder is injection molded, weld lines are easily found on its surface. The uneven surface also affects the mechanical properties of the plastic part. Therefore, an injection mold that is easy to form is proposed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to provide an injection mold that is easy to form, so as to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, one embodiment of the present invention provides an injection mold that is easy to form, including a top plate and a bottom plate, wherein a fixed mold is fixedly connected to the bottom of the top plate and a movable mold is fixedly connected to the top of the bottom plate;

[0007] After the fixed mold and the moving mold are closed, a cavity is formed. Guide pillars are fixedly connected at the four corners of the top surface of the moving mold, and the outer surface of the guide pillars is movably connected to the fixed mold and the top plate.

[0008] The moving mold is equipped with a slanted ejector mechanism, which is located below the cavity.

[0009] The top of the fixed mold has a feed port, and the inside of the fixed mold has a feed core. The feed core is located below the feed port, and a flow divider is fixedly connected to the bottom of the feed core. The bottom end of the flow divider has a fork and is divided into three branches, which are respectively connected to the main injection pipe and the auxiliary injection pipe.

[0010] The main injection tube is vertically arranged with its bottom end located inside the cavity. The auxiliary injection tubes are located on both sides of the cavity, with their bottom ends bent and their ports connected to the bottom of the cavity.

[0011] Preferably, as described in any of the above schemes, the top plate is provided with a fixed mold, a moving mold, and a bottom plate arranged in sequence below it.

[0012] The above technical solution is adopted: This device is specifically used for injection molding of the outer shell and back cover of law enforcement recorders.

[0013] Preferably, the moving mold and the fixed mold are made of cast iron, and the diameter of the feed core is smaller than the diameter of the feed inlet.

[0014] The above technical solution is implemented as follows: The injection mold consists of a moving mold and a fixed mold. The moving mold is mounted on the moving platen of the injection molding machine, while the fixed mold is mounted on the fixed platen. When the moving and fixed molds close, they form the gating system and cavity. After the molds separate, the plastic part remains on the moving mold side and is ejected by the demolding mechanism located within the moving mold. Once the plastic raw material is preheated to the set temperature, the injection molding machine begins mold closing. During mold closing, it is necessary to ensure a tight fit between the mold parting surfaces to prevent leakage of molten plastic. Then, the injection molding machine begins injecting molten plastic into the mold cavity. After injection, the injection molding machine performs a holding pressure operation to ensure that the molten plastic maintains a certain pressure within the mold cavity, preventing shrinkage and defects. Simultaneously, the cooling system in the mold begins to cool the plastic part. The injection molding machine then performs a demolding operation. During demolding, it is necessary to ensure that the plastic part can be smoothly removed from the mold without deformation or damage. Finally, the plastic part undergoes post-processing, such as removing burrs and other defects, followed by quality inspection and packaging.

[0015] Preferably, in any of the above embodiments, the diversion pipe is arranged vertically, and the material of the injection pipe and the auxiliary injection pipe is stainless steel.

[0016] The core structure of this device, employing the above technical solution, consists of: a feed inlet, a feed core, a distributor pipe, a main injection pipe, and a secondary injection pipe. The core advantages of this device are: the injection mold for the rear shell of the law enforcement recorder uses a three-pipe system (two on the sides of the rear shell and one at the end) to divert the raw material into three points within the cavity, enabling simultaneous injection molding at these three points. This allows the molten plastic to enter the cavity simultaneously from all three points, thus accelerating the filling speed and shortening the molding cycle. It also reduces weld lines: simultaneous injection molding reduces the formation of weld lines. Weld lines are marks formed when molten plastic merges within the cavity, affecting the appearance and mechanical properties of the plastic part. Simultaneous injection through the main and secondary injection pipes allows for a more uniform distribution of the molten plastic within the cavity, reducing weld line formation. Furthermore, it allows for more uniform cooling and solidification of the molten plastic within the cavity, reducing shrinkage and deformation caused by uneven cooling and improving the dimensional accuracy of the plastic part.

[0017] Preferably, in any of the above schemes, the bottom end of the auxiliary injection tube is first horizontal, then bent downwards, and then straight up to connect to the bottom of the cavity.

[0018] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0019] This easily molded injection mold, through the coordinated design of the inlet, inlet core, manifold, main injection pipe, and auxiliary injection pipe, utilizes a three-pipe system (two on the sides of the rear shell and one at the end) to divert the raw material into the cavity at three points. This allows for simultaneous injection molding at these three points, enabling the molten plastic to enter the cavity simultaneously from all three locations, thus accelerating the filling speed and shortening the molding cycle. It also reduces weld lines: simultaneous injection molding reduces the formation of weld lines. Weld lines are marks formed when molten plastic merges within the cavity, affecting the appearance and mechanical properties of the plastic part. Simultaneous injection through the main and auxiliary injection pipes allows for a more even distribution of the molten plastic within the cavity, reducing weld line formation. Furthermore, it allows for more uniform cooling and solidification of the molten plastic within the cavity, reducing shrinkage and deformation caused by uneven cooling and improving the dimensional accuracy of the plastic part.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the feed core of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the moving mold of this utility model;

[0025] Figure 4 This utility model Figure 3 A magnified structural diagram of point A in the middle.

[0026] In the diagram: 1-Top plate, 2-Bottom plate, 3-Moving mold, 4-Guide pillar, 5-Angled ejector mechanism, 6-Inlet, 7-Inlet core, 8-Diverter pipe, 9-Main injection pipe, 10-Fixed mold, 11-Secondary injection pipe. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] like Figure 1 As shown, this easy-to-form injection mold includes a top plate 1 and a bottom plate 2. A fixed mold 10 is fixedly connected to the bottom of the top plate 1, and a moving mold 3 is fixedly connected to the top of the bottom plate 2.

[0030] After the fixed mold 10 and the moving mold 3 are closed, a cavity is formed. Guide pillars 4 are fixedly connected at the four corners of the top surface of the moving mold 3. The outer surface of the guide pillars 4 is movably connected to the fixed mold 10 and the top plate 1.

[0031] The moving mold 3 is equipped with a slanted ejector mechanism 5, which is located below the cavity.

[0032] The top of the fixed mold 10 is provided with a feed port 6, and the inside of the fixed mold 10 is provided with a feed core 7. The feed core 7 is located below the feed port 6. A diversion pipe 8 is fixedly connected to the bottom of the feed core 7. The bottom end of the diversion pipe 8 has a fork and is divided into three branches, which are respectively connected to the main injection pipe 9 and the auxiliary injection pipe 11.

[0033] The main injection tube 9 is vertically arranged, with its bottom end located inside the cavity. The auxiliary injection tube 11 is located on both sides of the cavity, with its bottom end bent and its port connected to the bottom of the cavity.

[0034] Example 1: Below the top plate 1 are, in sequence, a fixed mold 10, a moving mold 3, and a bottom plate 2. This device is specifically designed for injection molding of the outer shell and back shell of law enforcement recorders. The moving mold 3 and the fixed mold 10 are made of cast iron, and the diameter of the feed core 7 is smaller than the diameter of the feed port 6. The manifold 8 is vertically arranged, and the main injection pipe 9 and the auxiliary injection pipe 11 are made of stainless steel. The injection mold for the back shell of the law enforcement recorder uses a three-pipe system, i.e., the manifold 8, to divert the raw material into three points in the cavity (two on the sides of the back shell and one at the end of the back shell), achieving simultaneous injection molding of the three pipes at different points. This allows the molten plastic to enter the cavity from the three points simultaneously, thereby accelerating the filling speed and shortening the molding cycle. Through simultaneous injection molding of the main injection pipe 9 and the auxiliary injection pipe 11, the molten plastic can be more evenly distributed in the cavity, thereby reducing the formation of weld lines. This allows the plastic melt to cool and solidify more evenly within the mold cavity, thereby reducing shrinkage and deformation caused by uneven cooling and improving the dimensional accuracy of the plastic parts.

[0035] Example 2: The bottom end of the auxiliary injection tube 11 is first horizontal, then bent downwards and then straight up to connect to the bottom of the cavity.

[0036] The working principle of this utility model is as follows:

[0037] In this system, the injection mold consists of a moving mold 3 and a fixed mold 10. The moving mold 3 is mounted on the moving platen of the injection molding machine, while the fixed mold 10 is mounted on the fixed platen. When the moving mold 3 and fixed mold 10 are closed, they form the gating system and cavity. After the molds separate, the plastic part remains on one side of the moving mold 3 and is ejected by a demolding mechanism located within the moving mold. Once the plastic material is preheated to the set temperature, the injection molding machine begins mold closing. During mold closing, it is necessary to ensure a tight fit between the mold parting surfaces to prevent leakage of molten plastic. Then, the injection molding machine begins injecting molten plastic into the mold cavity. After injection, the injection molding machine performs a holding pressure operation to ensure that the molten plastic maintains a certain pressure within the mold cavity, preventing shrinkage and defects. Simultaneously, the cooling system in the mold begins to cool the plastic part. The injection molding machine then performs a demolding operation. During demolding, it is necessary to ensure that the plastic part can be smoothly removed from the mold without deformation or damage. Finally, the plastic part undergoes post-processing, such as removing burrs and other defects, followed by quality inspection and packaging.

[0038] Compared with the prior art, the present invention has the following advantages:

[0039] This easily molded injection mold, through the coordinated arrangement of the inlet 6, inlet core 7, manifold 8, main injection pipe 9, and auxiliary injection pipe 11, allows the law enforcement recorder's rear shell injection mold to use a three-pipe system (manifold 8) to divert the raw material into three points in the cavity (two on the sides of the rear shell and one at the end). This enables simultaneous injection molding at the three points, allowing the molten plastic to enter the cavity simultaneously from three points, thus accelerating the filling speed and shortening the molding cycle. It also reduces weld lines: simultaneous injection molding reduces the formation of weld lines. Weld lines are marks formed when molten plastic merges within the cavity, affecting the appearance and mechanical properties of the plastic part. Simultaneous injection through the main injection pipe 9 and auxiliary injection pipe 11 allows for a more even distribution of the molten plastic within the cavity, reducing weld line formation. Furthermore, it allows for more uniform cooling and solidification of the molten plastic within the cavity, reducing shrinkage and deformation caused by uneven cooling and improving the dimensional accuracy of the plastic part.

Claims

1. An injection mold facilitating molding, characterized by, Including top plate (1), bottom plate (2), the bottom of top plate (1) is fixedly connected with fixed mould (10), the top of bottom plate (2) is fixedly connected with movable mould (3); The fixed mould (10), movable mould (3) form a cavity after closing, the top surface of movable mould (3) is fixedly connected with guide column (4) at four corners, the outer surface of guide column (4) is movably connected with fixed mould (10) and top plate (1); The movable mould (3) is installed with inclined top mechanism (5), and the inclined top mechanism (5) is located below the cavity; The top of fixed mould (10) is provided with feeding port (6), the inside of fixed mould (10) is provided with feeding core (7), the feeding core (7) is located below feeding port (6), the lower portion of feeding core (7) is fixedly connected with shunt pipe (8), the bottom end of shunt pipe (8) has bifurcation and is divided into three prongs and is connected with main injection pipe (9) and auxiliary injection pipe (11) respectively; The main injection pipe (9) is vertically arranged, and the bottom end thereof is located inside the cavity, the auxiliary injection pipe (11) is located on both sides of the cavity, and the bottom end of the auxiliary injection pipe (11) is in the form of bending and the port thereof is communicated with the bottom of the cavity.

2. The injection mold for easy molding as described in claim 1, characterized in that: The bottom of top plate (1) is sequentially provided with fixed mould (10), movable mould (3) and bottom plate (2).

3. The injection mold for easy molding as described in claim 2, characterized in that: The material of movable mould (3) and fixed mould (10) is cast iron, and the diameter of feeding core (7) is less than the diameter of feeding port (6).

4. A mold for injection molding of a preform according to claim 3, wherein: The shunt pipe (8) is vertically arranged, and the material of main injection pipe (9) and auxiliary injection pipe (11) is stainless steel.

5. The injection mold for easy molding as described in claim 4, characterized in that: The bottom end of auxiliary injection pipe (11) is horizontally arranged first, then is bent downward, and then is straightly connected with the bottom of the cavity.

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