Glue opening structure, injection molding device and injection molding process

Abstract

The embodiment of the invention discloses a glue opening structure, an injection molding device and an injection molding process, the glue opening structure comprises a main body, the main body is provided with a glue inlet end and a glue outlet end, and the main body is in a necking shape in the direction from the glue inlet end to the glue outlet end; the glue outlet end is provided with at least two glue outlets, a hollow area is formed between any two adjacent glue outlets, and the length of the hollow area is not smaller than that of the glue outlets along the cross section of the glue outlet end. Therefore, the design of the multiple glue outlets and the hollowed-out areas can be utilized, so that the internal stress of the plastic at the glue outlet end is redistributed, the injection molding defects, such as breakage of the plastic at the glue outlet end, deformation of the side wall of a product, excessive plastic residue and the like, caused by non-uniform internal stress of melt glue at the glue outlet end can be reduced, and the forming quality and performance of the product are further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding equipment, and more specifically, to a glue port structure, an injection molding device and an injection molding process. Background Art

[0002] In the injection molding process, the design of the nozzle structure has a crucial impact on the molding quality and production efficiency of the product. The traditional nozzle structure often adopts a single nozzle design. Although this design can meet the basic injection molding requirements to a certain extent, it gradually exposes some problems in practical applications.

[0003] For example, the design of a single glue outlet will cause the glue outlet to be pulled and deformed when it is separated from the product at the end of injection molding, and cause a big problem of plastic residue at the glue outlet end, affecting the appearance quality of the product. Due to the influence of such defects, the size of the single glue outlet must be designed within a certain range, which has great limitations and is not conducive to product injection molding. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a novel nozzle structure, an injection molding device and an injection molding process.

[0005] According to one aspect of the present invention, a glue port structure is provided.

[0006] The glue port structure comprises:

[0007] A main body, wherein the main body has a glue inlet end and a glue outlet end, and along the direction from the glue inlet end to the glue outlet end, the main body is in a constricted shape;

[0008] The glue outlet end has at least two glue outlets, a hollow area is formed between any two adjacent glue outlets, and along the cross section of the glue outlet end, the length of the hollow area is not less than the length of the glue outlet.

[0009] Optionally, along the direction from the glue inlet end to the glue outlet end, the ratio of the depth of the hollow area to the length of the hollow area ranges from 1:1 to 2:1.

[0010] Optionally, along the direction from the glue inlet end to the glue outlet end, the ratio of the depth of the hollow area to the length of the hollow area is 1.5:1.

[0011] Optionally, the plurality of glue outlets are arranged side by side; or, the plurality of glue outlets are arranged in an array.

[0012] Optionally, the sizes of the plurality of glue outlets are equal.

[0013] Optionally, the glue outlet end has two glue outlets, and the two glue outlets and the hollow area form a U-shaped structure.

[0014] Optionally, along the direction from the glue inlet end to the glue outlet end, the thickness of the U-shaped structure gradually decreases.

[0015] According to another aspect of the present invention, an injection molding device is provided, comprising a body and the above-mentioned glue outlet structure, wherein the glue outlet structure is connected to an end portion of the body.

[0016] Optionally, the main body has a first flow channel, the nozzle structure has a second flow channel, the second flow channel includes at least two branch flow channels, and each of the branch flow channels is connected to the first flow channel.

[0017] According to another aspect of the present invention, there is provided an injection molding process using the injection molding device, comprising:

[0018] Open the mold, place the rubber material and the mold containing the injection molding device into the injection molding machine, and adjust the injection molding machine parameters based on the mold structure;

[0019] Injection molding, heating, melting and compressing the rubber material, and injecting the obtained molten rubber material into the mold cavity through the injection flow channel and the rubber outlet;

[0020] Demolding: After the rubber material is cooled and solidified, the rubber outlet is cut off by an ejector pin, so that the rubber outlet is separated from the product, and a finished injection molded product is obtained.

[0021] One technical effect of the embodiments of the present disclosure is:

[0022] The glue outlet structure includes a main body, the main body has a glue inlet end and a glue outlet end, and the main body is in a constricted shape along the direction from the glue inlet end to the glue outlet end; the glue outlet end has at least two glue outlets, and a hollow area is formed between any two adjacent glue outlets, and along the cross section of the glue outlet end, the length of the hollow area is not less than the length of the glue outlet. In this way, the design of multiple glue outlets and hollow areas can be used to redistribute the internal stress of the plastic at the glue outlet end, which helps to reduce injection defects caused by uneven internal stress of the molten glue at the glue outlet end, such as deformation of the product side wall and excessive plastic residue when the plastic at the glue outlet end breaks, further improving the molding quality and performance of the product.

[0023] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0025] Figure 1 is a schematic diagram of a glue port structure according to an embodiment of the present disclosure;

[0026] Figure 2 is another schematic diagram of a glue port structure according to an embodiment of the present disclosure;

[0027] Figure 3 is a schematic diagram of an injection molding device according to an embodiment of the present disclosure;

[0028] Figure 4 yes Figure 3 Sectional view at AA in the middle;

[0029] Figure 5 It is an equivalent stress simulation diagram of the glue mouth structure of the prior art;

[0030] Figure 6 1 is an equivalent stress simulation diagram of the glue port structure of the embodiment of the present disclosure.

[0031] Description of reference numerals:

[0032] 001. Products;

[0033] 1. Main body; 11. Glue outlet; 12. Hollow area; 2. Mold body; 21. First flow channel; 3. Ejector pin. DETAILED DESCRIPTION

[0034] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0035] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0036] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0037] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0038] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0039] The embodiment of the present invention provides a glue inlet structure, which can be applied to an injection molding device or an injection mold. During the injection molding process, the molten rubber can enter the glue inlet end of the glue inlet structure through the first flow channel 21 of the injection molding device; then, the rubber is guided by the glue inlet structure and filled into the mold cavity through the glue outlet end.

[0040] like Figure 1 and Figure 2 As shown, the glue port structure provided by the embodiment of the present invention includes:

[0041] A main body 1, wherein the main body 1 has a glue inlet end and a glue outlet end, and along the direction from the glue inlet end to the glue outlet end, the main body 1 is in a constricted shape;

[0042] The glue outlet end has at least two glue outlets 11 , and a hollow area 12 is formed between any two adjacent glue outlets 11 . In the cross section along the glue outlet end, the length of the hollow area 12 is not less than the length of the glue outlet 11 .

[0043] Specifically, the main body 1 has a glue inlet end and a glue outlet end, and a glue injection channel is provided between the glue inlet end and the glue outlet end, and glue flows in the glue injection channel to facilitate the injection molding process.

[0044] Among them, the main body 1 is designed to be constricted from the inlet to the outlet, that is, the main body 1 gradually narrows, which helps to guide the rubber to flow more evenly during the injection molding process, increase the shear rate of the plastic flowing inside the rubber inlet, thereby improving the injection molding efficiency and the appearance of the product, thereby ensuring the quality of the product and improving the yield of the injection molded product. In addition, the constricted design of the main body 1 can improve the rubber residue at the outlet, without the need for a separate degumming process, and also saves the injection molding process and injection molding costs.

[0045] In addition, the necked design of the main body 1 makes the size of the glue outlet smaller, which is convenient for adapting to smaller products 001 and also convenient for adapting to complex injection molding requirements.

[0046] The constricted design of the main body 1 can also reduce the overall size of the nozzle structure, facilitating the miniaturization of the injection molding device having the nozzle structure.

[0047] The necking design of the main body 1 can be realized by a molding mold or by an adjustable mechanism such as a threaded adjustment ring, so as to facilitate adjustment according to different injection molding requirements and mold sizes. In addition, the number and arrangement of the glue outlets 11 can also be customized according to actual needs to meet a wider range of injection molding application scenarios.

[0048] like Figure 1 and Figure 2As shown, at the glue outlet, the embodiment of the present invention is provided with at least two glue outlets 11. These glue outlets 11 can be evenly distributed to ensure that the glue can flow out from multiple glue outlets 11 at the same time, and the distribution and flow of the glue during the injection molding process can be balanced; these glue outlets 11 can also be unevenly distributed to meet complex injection molding requirements, which helps to shorten the injection molding cycle and improve production efficiency.

[0049] Among them, a hollow area 12 is formed between any two adjacent glue outlets 11, that is, the two adjacent glue outlets 11 are spaced apart, which can reduce the weight of the glue outlet structure and enhance the dispersion and uniformity of the glue during glue discharge, so as to increase the shear stress of a single glue outlet 11, thereby facilitating the breakage of the glue after the injection molding is completed, and reducing the residual material, so that there is no need to set up a separate glue removal process, and also saves the injection molding process and injection molding cost.

[0050] Figure 5 The shear stress of the prior art glue port structure is shown. Figure 6 The shear stress of the glue port structure of the embodiment of the present invention is shown. It can be seen that Figure 6 The shear stress is greater than Figure 5 The shear stress in the injection molding process, that is, the glue port structure of the embodiment of the present invention can reduce the difficulty of the glue breaking, facilitate the breaking of the glue after the injection molding is completed, thereby improving the convenience and efficiency of the glue injection process.

[0051] Furthermore, the hollow area 12 is provided so that the glue outlet forms a split glue outlet 11, so as to reduce the continuous contact area between the glue outlet and the product 001, thereby reducing the adhesion between the glue and the product 001, so as to reduce the risk of deformation or rupture of the side wall of the product 001 when the glue breaks, thereby improving the molding quality of the product 001 and the yield rate of the injection molded product.

[0052] In addition, the design of multiple glue outlets 11 and hollow areas 12 makes the pressure distribution during the injection molding process more uniform, which helps to reduce injection molding defects caused by uneven pressure, such as shrinkage holes and bubbles, further improves the molding quality of product 001, and improves the injection molding product yield.

[0053] Moreover, the size design limitation of the split glue outlet 11 is small due to its greater internal stress and smaller broken plastic residue, so the size of the glue outlet 11 can be increased to meet more injection molding requirements. Compared with the existing integrated glue outlet 11, the split glue outlet 11 design can increase the total size of the glue outlet end for injection molding, while using the hollow area 12 to avoid the risk of deformation, cracking or residual material of the side wall of the product 001 when the glue breaks, and also facilitates the improvement of the molding quality of the product 001 and the improvement of the injection molding product yield.

[0054] like Figure 1 and Figure 2 As shown, the length of the hollow area 12 along the cross section of the glue outlet is set to be greater than or equal to the length of the glue outlet 11, which can ensure that the hollow area has a sufficient area to reduce the accumulation and retention of the rubber near the glue outlet 11, thereby reducing the wear and clogging risk of the mold, helping to extend the service life of the mold and reduce maintenance costs. At the same time, it also helps to maintain the continuity of the flow of the rubber and reduce problems such as poor flow or uneven pressure caused by accumulation.

[0055] In addition, the hollow area of ​​a certain size can also help improve the heat dissipation efficiency of the mold, reduce temperature fluctuations during the injection molding process, shorten the product injection molding cycle to a certain extent, and improve the stability and reliability of product 001.

[0056] The main body 1 and the glue outlet 11 can be made of high temperature resistant, high strength and easy to process materials, such as stainless steel or special alloys, to ensure the stability and durability of the glue outlet structure during the injection molding process. During the processing, precise mechanical processing or laser cutting technology can be used to ensure the dimensional accuracy and shape consistency of the glue outlet 11 and the hollow area 12.

[0057] Optionally, along the direction from the glue inlet end to the glue outlet end, the ratio of the depth of the hollow area 12 to the length of the hollow area 12 is in a range of 1:1 to 2:1.

[0058] Specifically, when the ratio of the depth to the length of the hollow area 12 is within a range of 1:1 to 2:1, the hollow area 12 can provide more flow space for the rubber, reduce problems such as poor flow or uneven pressure due to space limitations, facilitate the implementation of the injection molding process, and also help the rubber to fill the mold cavity more quickly, especially in complex or deep cavity molds, which can not only shorten the injection molding cycle but also improve the filling quality and consistency of product 001.

[0059] Furthermore, by setting the ratio of the depth to the length of the hollow area 12 between 1:1 and 2:1, the depth of the hollow area 12 can be utilized to more effectively transfer heat to the air, thereby lowering the mold temperature, reducing problems such as rubber degradation and product 001 deformation caused by excessive temperature, and helping to reduce the temperature gradient inside the mold, thereby reducing injection defects caused by uneven temperature.

[0060] In addition, by reasonably designing the ratio of the depth to the length of the hollow area 12, it can be ensured that the hollow area 12 will not be too fragile, which helps to maintain the overall structural strength of the mold and extend the service life of the mold. At the same time, it can also reduce the size of the glue port structure, making it easier to adapt to smaller products 001 and complex injection molding requirements.

[0061] Optionally, along the direction from the glue inlet end to the glue outlet end, the ratio of the depth of the hollow area 12 to the length of the hollow area 12 is 1.5:1, that is, the depth of the hollow area 12 is 1.5 times the length of the hollow area 12. While maintaining the overall structural strength of the mold and extending the service life of the mold, it is also possible to reduce the size of the glue port structure, which is convenient for adapting to smaller products 001 and complex injection molding requirements.

[0062] Optionally, the plurality of glue outlets 11 are arranged side by side; or, the plurality of glue outlets 11 are arranged in an array.

[0063] In one embodiment, multiple glue outlets 11 can be arranged side by side to ensure that the glue can flow out from multiple glue outlets 11 simultaneously during the injection molding process, which helps to reduce problems such as glue accumulation and uneven flow caused by single-point glue discharge, thereby improving the filling quality and consistency of product 001.

[0064] In another embodiment, multiple glue outlets 11 may be arranged in an array, which can not only achieve uniform distribution of the glue outlet end, but also achieve more precise glue flow control in depth. It is suitable for complex or large molds and can ensure that the glue in the mold cavity is fully and evenly filled.

[0065] The provision of multiple glue outlets 11 can shorten the injection molding cycle, increase the shear rate of plastic flow, and improve the injection molding efficiency. In addition, multiple glue outlets 11 can also guide the flow of the rubber material, which helps to reduce injection molding defects such as shrinkage holes, bubbles, weld lines, etc. caused by uneven flow of the rubber material, thereby improving the molding quality of the product 001.

[0066] Optionally, the sizes of the plurality of glue outlets 11 are equal.

[0067] Specifically, multiple glue outlets 11 are set to be of equal size. On the one hand, it can balance the distribution and flow of the glue during the injection molding process and ensure that the glue output of each glue outlet 11 is basically the same, thereby improving the injection uniformity and controllability of the glue outlet structure; on the other hand, it also facilitates the convenient molding of multiple glue outlets 11, reduces the difficulty of mold opening and molding efficiency, and can also improve the symmetry and stability of the glue outlet structure.

[0068] Optionally, the glue outlet end has two glue outlets 11 , and the two glue outlets 11 and the hollow area 12 form a U-shaped structure.

[0069] like Figure 1 and Figure 2As shown, the U-shaped structure formed by the two glue outlets 11 and the hollow area 12 therein can guide the rubber to flow along the U-shaped path, which helps to reduce the resistance and turbulence of the rubber during the flow process, and achieves smoother and more uniform filling, thereby ensuring that the molding quality of the same batch of products 001 is more consistent and the defect rate is reduced. In addition, the design of the U-shaped structure helps to balance the pressure distribution during the injection molding process, so that the rubber can more easily reach every corner of the mold cavity, reducing insufficient filling or injection defects caused by flow dead corners.

[0070] The two glue outlets 11 on both sides of the U-shaped structure can discharge glue together to improve the injection efficiency and shorten the injection cycle. The synchronous discharge of glue from the two glue outlets 11 can also ensure that the pressure in the mold cavity is more uniform, reducing injection defects caused by uneven pressure.

[0071] In addition, the U-shaped structure design helps to reduce the accumulation and retention of rubber in the mold, thereby reducing the risk of mold wear and making it easier to remove residues, extending the service life of the mold.

[0072] Optionally, along the direction from the glue inlet end to the glue outlet end, the thickness of the U-shaped structure gradually decreases.

[0073] Specifically, the thickness of the U-shaped structure is gradually reduced. On the one hand, the U-shaped structure can guide the rubber to flow more evenly during the injection molding process to reduce pressure loss and rubber retention, thereby improving injection molding efficiency and product quality. It also makes the size of the glue outlet smaller, which is convenient for adapting to smaller products 001 and complex injection molding requirements. On the other hand, the thickness of the U-shaped structure is gradually reduced, which also makes the size of the glue outlet smaller, which can increase the shear stress of the glue outlet, facilitate the breakage of the rubber after the injection molding is completed, and reduce the residual material.

[0074] The embodiment of the present invention further provides an injection molding device, including a mold body 2 and the aforementioned glue port structure, wherein the glue port structure is connected to the end of the mold body 2 .

[0075] like Figure 3 and Figure 4 As shown, the mold body 2 of the injection molding device is usually made of high-strength, high-temperature resistant materials. A first flow channel 21 is provided inside the mold body 2, and the first flow channel 21 is used to contain the molten rubber material and inject it into the mold cavity through the injection molding process.

[0076] The glue port structure is connected to the end of the mold body 2, so that the glue inlet end of the glue port structure is connected to the first flow channel 21 of the mold body 2, and is used to receive the molten glue from the mold body 2. The glue outlet end of the glue port structure has at least two glue outlets 11, and there is a hollow area 12 between two adjacent glue outlets 11, so as to optimize the flow path of the glue and improve the injection molding efficiency and quality. In addition, the hollow area 12 can also reduce the resistance and accumulation of the glue during the flow process, while improving the heat dissipation efficiency and extending the service life of the injection molding device.

[0077] During the injection molding process, the molten rubber enters the rubber inlet end of the rubber inlet structure through the first flow channel 21 of the mold body 2. Then, the rubber is guided along the hollow area 12 and filled into the molding cavity of the mold through the multiple rubber outlets 11, thereby optimizing the flow path of the rubber, reducing flow resistance and accumulation, and improving injection molding efficiency and quality.

[0078] Optionally, the mold body 2 has a first flow channel 21 in it, the nozzle structure has a second flow channel in it, the second flow channel includes at least two branch flow channels, and each of the branch flow channels is connected to the first flow channel 21 .

[0079] like Figure 3 and Figure 4 As shown, molten rubber flows in the first flow channel 21 in the mold body 2, and each glue outlet 11 of the glue outlet structure corresponds to a branch flow channel, and each branch flow channel is respectively connected to the first flow channel 21, so that the rubber can be dispersed into different branch flow channels through the first flow channel 21, so that the injection molding process can be realized by using multiple glue outlets 11 to improve the injection molding efficiency and balance the rubber distribution and rubber flow during the injection molding process.

[0080] The embodiment of the present invention further provides an injection molding process using the above-mentioned injection molding device, comprising:

[0081] S1. Open the mold, place the rubber material and the injection molding device in the injection molding machine, and adjust the position and parameters of the injection molding device;

[0082] S2 injection molding, heating, melting and compressing the rubber material, and injecting the obtained molten rubber material into the mold cavity through the injection flow channel and the rubber outlet 11;

[0083] S3. Demolding: After the rubber material is cooled and solidified, the rubber outlet is cut off by the ejector pin 3, so that the rubber outlet 11 is separated from the product 001, and the injection-molded product 001 is obtained.

[0084] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0085] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A glue port structure, characterized in that: include: A main body (1), the main body (1) having a glue inlet end and a glue outlet end, and along the direction from the glue inlet end to the glue outlet end, the main body (1) is in a constricted shape; The glue outlet end has at least two glue outlets (11), a hollow area (12) is formed between any two adjacent glue outlets (11), and along the cross section of the glue outlet end, the length of the hollow area (12) is not less than the length of the glue outlet (11).

2. The glue port structure according to claim 1, characterized in that: Along the direction from the glue inlet end to the glue outlet end, the ratio of the depth of the hollow area (12) to the length of the hollow area (12) ranges from 1:1 to 2:

1.

3. The glue port structure according to claim 2, characterized in that: Along the direction from the glue inlet end to the glue outlet end, the ratio of the depth of the hollow area (12) to the length of the hollow area (12) is 1.5:

1.

4. The glue port structure according to claim 1, characterized in that: The plurality of glue outlets (11) are arranged side by side; or, the plurality of glue outlets (11) are arranged in an array.

5. The glue port structure according to claim 4, characterized in that: The sizes of the plurality of glue outlets (11) are equal.

6. The glue port structure according to claim 1, characterized in that: The glue outlet end has two glue outlets (11), and the two glue outlets (11) and the hollow area (12) form a U-shaped structure.

7. A glue port structure according to claim 6, characterized in that: Along the direction from the glue inlet end to the glue outlet end, the thickness of the U-shaped structure gradually decreases.

8. An injection molding device, characterized in that: It comprises a mold body (2) and a glue port structure as claimed in any one of claims 1 to 7, wherein the glue port structure is connected to the end of the mold body (2).

9. The injection molding device according to claim 8, characterized in that: The mold body (2) has a first flow channel (21) in it, the nozzle structure has a second flow channel in it, the second flow channel includes at least two branch flow channels, and each of the branch flow channels is connected to the first flow channel (21).

10. An injection molding process using the injection molding device according to claim 8 or 9, characterized in that: include: Opening the mold, placing the rubber material and the mold containing the injection molding device in the injection molding machine, and adjusting the parameters of the injection molding machine in combination with the injection molding device; Injection molding, heating, melting and compressing the rubber material. Under the action of the injection molding machine, the obtained molten rubber material is injected into the mold cavity through the injection flow channel and the rubber outlet, so that the molten rubber material fills the product; Demolding: After the rubber material is cooled and solidified, the rubber outlet is cut off by an ejector pin, so that the rubber outlet is separated from the product, and a finished injection molded product is obtained.

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