Automatic stripping vertical injection mold

Abstract

The utility model discloses an automatic material stripping vertical injection mold, and the automatic material stripping vertical injection mold is equipped with a feeding channel and a cavity, the connecting place of the feeding channel and the cavity is a feeding port, the cross section shape of the feeding port is conical, and the top of the cone of the feeding port is communicated with the cavity. The feeding channel of the application adopts the design of latent type, and the feeding head at the connecting place of the feeding channel and the cavity is a unique conical punching structure. When the injection mold is opened, the feeding port is directly cut off due to the special structural design of the feeding port, so that the excess feeding point burrs are not left on the formed plug, and the automatic material stripping function is realized. After the product is demolded, the nozzle glue port is automatically disconnected, manual trimming of burrs is not needed, the production process is reduced, the labor cost is saved, and the production efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of injection molds, and in particular to an automatic stripping vertical injection mold. Background Technology

[0002] Cable connectors are interfaces used to connect cables to equipment or other cables, and are widely used in electronics, communications, power, and other fields. Common types of cable connectors include RCA connectors, HDMI connectors, USB connectors, RJ45 connectors, and BNC connectors.

[0003] In the injection molding production of cable plugs, existing technologies have several shortcomings. Currently, the feed points of different cable plug molds are typically machined using grinding or EDM processes. The feed point consists of two halves, an upper mold and a lower mold, designed to connect to the product cavity on the mold surface for casting. However, after injection molding, the sprue and the product gate cannot be cleanly separated, leaving burrs that severely affect the product's appearance. To solve this problem, manual trimming is required after molding. This not only adds an extra step and increases production costs but also reduces production efficiency. Furthermore, the quality of manual trimming is inconsistent, making it difficult to guarantee product uniformity. Utility Model Content

[0004] This utility model aims to at least partially solve one of the problems in related technologies. Therefore, one of the objectives of this utility model is to provide an automatic stripping vertical injection mold for achieving automatic stripping, where the sprue material and the product gate are directly cut off during mold opening, improving production efficiency and product quality.

[0005] An automatic stripping vertical injection mold is provided, wherein the automatic stripping vertical injection mold is provided with a feeding channel and a cavity, the connection between the feeding channel and the cavity is a feeding port, the cross-sectional shape of the feeding port is conical, and the apex of the feeding port is connected to the cavity.

[0006] Furthermore, the feed inlet has a layered structure, including a top cone layer, an intermediate layer, and a bottom cone layer extending from near to far from the cavity, wherein the top cone layer, the intermediate layer, and the bottom cone layer are made of different materials.

[0007] Furthermore, the top layer of the cone is made of tungsten carbide or cemented carbide.

[0008] Furthermore, the intermediate layer is made of beryllium copper alloy or aluminum bronze.

[0009] Furthermore, the material of the cone bottom layer is P20 mold steel.

[0010] Furthermore, the inner surface of the feed inlet is provided with a plurality of diverting blades, which extend along the axial direction of the feed channel and are radially distributed along the feed inlet.

[0011] Furthermore, several of the diverting blades divide the interior of the feed inlet into multiple diverting channels, and the cross-sectional area of ​​the diverting channels gradually increases along the direction from the cone apex to the cone bottom of the feed inlet.

[0012] Furthermore, the conical surface of the feed inlet is provided with several guide grooves, which are radially distributed along the feed inlet, and one of the guide grooves is connected to one of the diversion channels.

[0013] Furthermore, the surface of the feed inlet is coated with a nanomaterial coating.

[0014] Furthermore, an elastic buffer layer is provided between the cone apex of the feed inlet and the cavity.

[0015] Compared with the prior art, the technical solution provided in this application has the following advantages: This application adopts a submerged design for the feeding channel, and the feeding head at the connection between the feeding channel and the cavity has a unique conical perforation structure. Specifically, the feeding port of the feeding channel is connected to the cavity, and the cone tip of the conical feeding head is directly connected to the cavity to form the feeding port. During injection molding and mold opening, due to the special structural design of the feeding port, the feeding port is directly cut off, so that no excess feeding point burrs remain on the formed plug, realizing the automatic stripping function. Due to the conical perforation structure of the feeding head, during mold opening, the feeding port is directly cut off under the combined action of injection pressure and mold opening force, and the sprue material is automatically separated from the product, so that no feeding point burrs remain on the product surface. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] In the attached image:

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the automatic stripping vertical injection mold of this application;

[0020] Figure 2This is a schematic diagram of the structure of an embodiment of the automatic stripping vertical injection mold of this application from another perspective;

[0021] Figure 3 This is a schematic diagram of the exterior of an embodiment of the automatic stripping vertical injection mold of this application.

[0022] Figure label:

[0023] 1. Automatic stripping vertical injection mold; 10. Feed channel; 11. Feed port; 30. Cavity. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] like Figure 1 - Figure 3 As shown, the present application provides an automatic stripping vertical injection mold 1. The automatic stripping vertical injection mold 1 is provided with a feeding channel 10 and a cavity 30. The connection between the feeding channel 10 and the cavity 30 is a feeding port 11. The cross-sectional shape of the feeding port 11 is conical, and the cone apex of the feeding port 11 is connected to the cavity 30.

[0027] The feed channel 10 adopts a submerged design, and the feed head at the connection between the feed channel 10 and the cavity 30 has a unique conical perforated structure. Specifically, the feed port 11 of the feed channel 10 is connected to the cavity 30, and the cone tip of the conical feed head directly connects to the cavity 30 to form the feed port 11. During injection molding, due to the special structural design of the feed port 11, the feed port 11 is directly cut off, so that no excess feed point burrs remain on the formed plug, realizing automatic material removal. This achieves automatic disconnection of the sprue after product demolding, eliminating the need for manual burr trimming, reducing production steps, saving labor costs, and greatly improving production efficiency. It avoids damage to the product that may be caused by manual burr trimming, ensuring the cleanliness and consistency of the product surface, and improving the product's appearance quality and performance. Reduced manual operation lowers labor costs; at the same time, due to the improved product quality, the defect rate is reduced, further reducing production costs.

[0028] The cavity 30 assembly includes the product cavity 30 and the cavity 30 wall. The product cavity 30 is used to mold CABLE plug products. The cavity 30 wall is made of high-strength, wear-resistant mold steel to ensure the service life of the mold and the molding accuracy of the product. Simultaneously, cooling water channels are provided inside the cavity 30 wall. Through circulating water cooling, the temperature during the product molding process can be effectively controlled, preventing defects such as deformation and shrinkage, and improving product quality.

[0029] Furthermore, the feed inlet 11 has a layered structure, including a top cone layer, an intermediate layer, and a bottom cone layer along the path from near to far from the cavity 30, with the top cone layer, intermediate layer, and bottom cone layer made of different materials.

[0030] Based on the original conical punching structure, the conical feed head is designed as a layered structure. From the apex to the bottom of the cone, it is composed of parts made of different materials or with different properties. For example, the apex of the cone near the cavity 30 is made of a special alloy material with high hardness, high wear resistance, and good compatibility with the plastic melt, to ensure that the cut-off point of the feed port 11 can maintain good precision and stability during frequent injection molding, and to avoid uneven cut-off of the feed port 11 due to wear; the middle part can be made of a material with excellent thermal conductivity to accelerate the cooling and solidification of the plastic melt in the feed channel 10, making it easier to disconnect the feed port 11 when the mold is opened; the bottom of the cone near the feed channel 10 is made of a high-strength, corrosion-resistant material to ensure the stability of the entire feed head structure and withstand the high pressure during the injection molding process.

[0031] During injection molding, the molten plastic flows sequentially through each layer of the layered conical feed head. As it flows through the high-hardness cone apex, the melt smoothly enters the mold cavity 30, ensuring product molding quality. The good thermal conductivity of the middle layer promotes rapid cooling of the melt, making the cooled feed port 11 more prone to breakage upon mold opening. The high-strength material at the cone base provides reliable support for the entire feed head, preventing deformation under injection pressure. This synergistic layered structure further optimizes the cutting effect of the feed port 11 and extends the mold's lifespan.

[0032] Compared to a single-material conical feed head, the layered design significantly improves the accuracy and stability of the feed inlet 11 cut, reducing product defects caused by residue at the feed inlet 11. At the same time, the targeted selection of materials for each layer helps extend the overall lifespan of the mold and reduce mold maintenance costs.

[0033] Furthermore, the top layer of the cone is made of tungsten carbide or cemented carbide.

[0034] In this embodiment, the top cone layer can be made of tungsten carbide, which has extremely high hardness and wear resistance, far exceeding that of ordinary steel. Its strong wear resistance ensures that the cutting point of the inlet 11 maintains high precision during frequent injection molding, preventing uneven cutting due to wear and effectively reducing product defect rates. Furthermore, tungsten carbide has stable chemical properties and good compatibility with various plastic melts, and will not adversely affect the plastic molding process.

[0035] In another embodiment, cemented carbide YG8 or high-speed steel M2 can also be selected. YG8 cemented carbide has high hardness (HRA89.5) and good wear resistance. Its relatively high cobalt content and good toughness can ensure the cutting accuracy of the feed inlet 11 while resisting the impact force during injection molding to a certain extent, reducing the risk of chipping. High-speed steel M2 has a hardness of HRC63-66, good red hardness, and can maintain high hardness at high temperatures, which can effectively cope with the high-temperature environment during injection molding. It also has relatively good machinability and is easy to manufacture complex feed head shapes.

[0036] Furthermore, the intermediate layer is made of beryllium copper alloy or aluminum bronze.

[0037] In this embodiment, the intermediate layer can be made of beryllium copper alloy to accelerate the cooling and solidification of the plastic melt. During injection molding, it can quickly conduct the heat of the plastic melt away, causing the melt to cool rapidly within the feed channel 10. When the mold is opened, the cooled feed port 11 is easier to break, allowing the feed port 11 to be neatly disconnected, improving production efficiency and product quality.

[0038] In another embodiment, aluminum bronze can also be used. Aluminum bronze has a thermal conductivity between 110-170 W / (m·K), exhibiting good thermal conductivity and effectively conducting heat from the molten plastic. Simultaneously, it possesses high strength and hardness, exhibiting superior mechanical properties compared to ordinary bronze. This accelerates melt cooling while enhancing the structural strength of the feed head and improving mold durability.

[0039] Furthermore, the bottom layer of the cone is made of P20 mold steel.

[0040] In this embodiment, this part requires high strength and good corrosion resistance to withstand injection pressure and ensure structural stability. P20 pre-hardened steel is a suitable choice, as it has high strength and can maintain a stable structure under high injection pressure. Simultaneously, it possesses a certain degree of corrosion resistance, resisting the erosion of additives and other components in the plastic melt, extending mold life, and reducing mold maintenance costs.

[0041] In another embodiment, 718 plastic mold steel and NAK80 mirror mold steel can also be selected. 718 plastic mold steel has good overall performance, with a hardness of HRC33-37, a good balance between strength and toughness, can withstand the high pressure during injection molding, and has good polishing properties, which is beneficial to the smoothness of the feed channel 10 surface and reduces the flow resistance of the plastic melt. NAK80 mirror mold steel has a hardness as high as HRC37-43, excellent mirror processing performance and good electrical discharge machining properties, ensuring structural strength while meeting the requirements for high-precision machining of the feed channel 10, thus improving the overall quality of the mold.

[0042] Furthermore, the inner surface of the feed inlet 11 is provided with a number of diversion blades, which extend along the axial direction of the feed channel 10 and are radially distributed along the feed inlet 11.

[0043] In this embodiment, several diversion blades are arranged axially inside the conical inlet 11. These blades are evenly distributed radially from the apex of the inlet 11 and extend to a position close to the feed channel 10. During injection molding, after the plastic melt enters the inlet 11, it is first divided into multiple fine streams by the diversion blades, which flow in each diversion channel, resulting in a more uniform pressure distribution.

[0044] Furthermore, several diversion blades divide the interior of the feed inlet 11 into multiple diversion channels, and the cross-sectional area of ​​the diversion channels gradually increases along the direction from the cone apex to the cone bottom of the feed inlet 11.

[0045] In this embodiment, as the melt flows towards the bottom of the cone, the melt velocity gradually decreases due to the gradually increasing cross-sectional area of ​​the distribution channel, resulting in a more uniform pressure distribution. This effectively improves the flow uniformity of the plastic melt within the inlet 11 and the cavity 30, enhances the molding quality of the product, reduces stress concentration within the product, and strengthens the product's mechanical properties. By optimizing melt flow, injection pressure can also be reduced, mold life extended, production efficiency improved, and scrap rate reduced.

[0046] Furthermore, the conical surface of the feed inlet 11 is provided with several guide grooves, which are radially distributed along the feed inlet 11, and one guide groove is connected to a diversion channel.

[0047] In this embodiment, the guide groove on the conical surface further guides the flow direction of the melt, so that the melt can fill each part more evenly when it enters the cavity 30, avoiding the phenomenon of local underfilling or overfilling.

[0048] Furthermore, the surface of the feed inlet 11 is coated with a nanomaterial coating.

[0049] In this embodiment, a self-cleaning nanomaterial coating, such as a nano-titanium dioxide coating, is coated on the surface of the conical feed inlet 11. This coating possesses superhydrophilicity and photocatalytic activity, enabling it to decompose organic matter. The nanomaterial coating reduces product defects caused by clogging of the feed inlet 11 or residual impurities, thereby improving product quality stability.

[0050] Furthermore, an elastic buffer layer is provided between the cone apex of the feed inlet 11 and the cavity 30.

[0051] In this embodiment, an elastic buffer layer is added between the conical feed head and the wall of the cavity 30. This buffer layer is made of rubber or silicone material with a certain degree of elasticity and flexibility, and its thickness is controlled between 0.5 and 2 mm. The elastic buffer layer is tightly fitted to the conical surface of the feed head, surrounding the entire feed inlet 11. During injection molding, when the molten plastic is injected into the cavity 30, the elastic buffer layer acts as a buffer, mitigating the impact of the melt on the feed inlet 11 and the wall of the cavity 30, and reducing the impact of instantaneous changes in injection pressure on the structure of the feed inlet 11. During mold opening, the elastic deformation force generated by the elastic buffer layer assists in the cutting process of the feed inlet 11, making it easier to break the feed inlet 11 under the combined action of mold opening force and elastic force, and resulting in a cleaner break. It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. An automatic stripping vertical injection mold, characterized in that, The automatic stripping vertical injection mold is provided with a feeding channel and a cavity. The connection between the feeding channel and the cavity is a feeding port. The cross-sectional shape of the feeding port is conical, and the top of the cone of the feeding port is connected to the cavity.

2. The automatic stripping vertical injection mold according to claim 1, characterized in that, The feed inlet has a layered structure, including a top cone layer, a middle cone layer, and a bottom cone layer extending from near to far from the cavity. The top cone layer, the middle cone layer, and the bottom cone layer are made of different materials.

3. The automatic stripping vertical injection mold according to claim 2, characterized in that, The top layer of the cone is made of tungsten carbide or cemented carbide.

4. The automatic stripping vertical injection mold according to claim 2, characterized in that, The intermediate layer is made of beryllium copper alloy or aluminum bronze.

5. The automatic stripping vertical injection mold according to claim 2, characterized in that, The material of the cone bottom layer is P20 mold steel.

6. The automatic stripping vertical injection mold according to claim 1, characterized in that, The inner surface of the feed inlet is provided with a plurality of flow-dividing blades, which extend along the axial direction of the feed channel and are radially distributed along the feed inlet.

7. The automatic stripping vertical injection mold according to claim 6, characterized in that, The several diverting blades divide the interior of the feed inlet into multiple diverting channels, and the cross-sectional area of ​​the diverting channels gradually increases along the direction from the cone apex to the cone bottom of the feed inlet.

8. The automatic stripping vertical injection mold according to claim 7, characterized in that, The conical surface of the feed inlet is also provided with several guide grooves, which are radially distributed along the feed inlet, and one of the guide grooves is connected to one of the diversion channels.

9. The automatic stripping vertical injection mold according to claim 1, characterized in that, The surface of the feed inlet is coated with a nanomaterial coating.

10. The automatic stripping vertical injection mold according to claim 1, characterized in that, An elastic buffer layer is provided between the cone tip of the feed inlet and the cavity.

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