Die capable of shortening product runner

Abstract

The invention relates to a mold for shortening a product runner, which comprises a forming part and an upper fixing plate, a base plate is detachably connected to the upper fixing plate, the upper fixing plate is used for fixing the base plate on the forming part, the forming part comprises a runner plate, a front mold plate, a rear mold plate and a filling nozzle, and the runner plate is detachably connected with the front mold plate and the rear mold plate. The base plate is arranged between the upper fixing plate and the front mold plate, the filling nozzle penetrates through the upper fixing plate and the base plate and extends to the runner plate, the filling nozzle is used for carrying out plastic melt spray irrigation, and the front mold plate and the rear mold plate are used for forming a mold cavity. According to the invention, the problem that the raw material consumption is large and the cost unit price is increased in the plastic product production process due to the fact that the runner for injecting the plastic melt from the nozzle into the pouring system is long is effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding structures of injection molds, in particular to a mold for shortening a product flow channel. Background Art

[0002] At present, injection molds are important process equipment for producing various industrial products. With the rapid development of the plastics industry and the promotion and application of plastic products in aviation, aerospace, electronics, machinery, shipbuilding and automobile industries, the requirements for molds are getting higher and higher. Traditional mold design methods can no longer meet today's requirements. Injection molds are mainly used for batch production of products or parts of various shapes, functions and sizes. This type of processing technology is to inject the heated and melted plastic into the mold cavity with high pressure by an injection molding machine. After cooling and solidification, a molded product is obtained. The flow channel is processed in the mold. When processing parts, the liquid raw material is injected into the flow channel so that the raw material reaches the mold cavity to form a part with a predetermined shape.

[0003] In the related technology, the injection mold mainly includes molding parts, pouring system, guide parts, ejection mechanism, cooling and heating system and supporting parts. The molding parts include core and cavity. The molding parts directly determine the shape and size of the plastic product. The core forms the inner surface of the product, and the cavity forms the outer surface of the product. The molding parts are fixed to the template by screws or positioning pins. The pouring system is composed of main channel, branch channel, gate and cold material hole. The function of the pouring system is to introduce the plastic melt into the cavity. The main channel is usually connected to the nozzle of the injection molding machine, and the flow is distributed to each cavity. The gate controls the speed and flow of the melt entering the cavity. The cold material hole stores the front cold material. The main channel, branch channel, gate and cold material hole are all connected through the runner; the guide components include guide pins and guide sleeves, which are used to ensure the movement accuracy and guidance when the mold is opened and closed. The guide pins are installed on the fixed mold part and the guide sleeves are installed on the movable mold part, and the two cooperate with each other; the ejection mechanism includes push rods, push plates, reset rods, etc., which are used to push the plastic product out of the mold after the mold is opened; the cooling and heating system is used to control the temperature of the mold, ensure the good molding of the plastic melt and the quality of the product. The cooling system is generally achieved by opening a water channel in the template, and the heating system can use an electric heating rod, etc.; the supporting components include a movable template seat, a fixed template seat, a support plate, a pad, etc., which are used to support and fix other components of the mold.

[0004] Regarding the above-mentioned related technologies, the longitudinal flow channel for injecting the plastic melt from the nozzle to the casting system is generally long, resulting in a large amount of raw materials and an increase in the unit cost during the production of plastic products. Summary of the invention

[0005] In order to improve the problem that the flow channel of the plastic melt injected from the nozzle to the casting system is long, resulting in a large amount of raw materials and increased unit cost in the process of producing plastic products, the present invention provides a mold that shortens the product flow channel.

[0006] The present invention provides a mold for shortening a product flow channel using the following technical solution: A mold for shortening a product flow channel comprises a molding component and an upper fixed plate, the upper fixed plate is detachably connected to a pad, the upper fixed plate is used to fix the pad on the molding component, the molding component comprises a flow channel plate, a front template, a rear template and a filling nozzle, the pad is arranged between the upper fixed plate and the front template, the filling nozzle passes through the upper fixed plate and the pad, and the filling nozzle extends to the flow channel plate, the filling nozzle is used for spraying plastic melt, the front template and the rear template are used to form a cavity; a positioning guide column is fixedly connected to the side wall of the front template close to the rear template, the positioning guide column is inclined, and a positioning guide sleeve is provided on the side wall of the rear template close to the positioning guide column, and the positioning guide sleeve is arranged corresponding to the positioning guide column.

[0007] By adopting the above technical solution, during the injection molding process, the mold needs to undergo opening and closing movements. The inclined positioning guide pin and positioning guide sleeve design helps to maintain the stability of the mold during the opening and closing process, prevents the mold from shifting or shaking due to uneven force, thereby ensuring the accuracy and consistency of the injection molded product. The positioning guide pin and the guide sleeve are set at an angle. At the same time, by setting the positioning guide pin and the positioning guide sleeve at an angle, not only the necessary support force is provided for the mold, but also a certain impact and stress can be withstood during the opening and closing process of the mold, maintaining the stability and firmness of the mold. Furthermore, the inclined positioning guide pin and the positioning guide sleeve help to reduce the direct friction and collision of the mold during the opening and closing process to a certain extent, thereby extending the service life of the mold. At the same time, the cooperation of the positioning guide pin and the positioning guide sleeve can also prevent the front template from directly contacting the rear template, further reducing wear and fatigue; by adopting the above technical scheme, the travel of the nozzle on the upper fixed plate can be reduced, so that the nozzle is directly connected to the runner plate through the pad, thereby effectively shortening the runner and increasing the stability of the nozzle; a shorter runner means less plastic material remains in the runner, which reduces the waste of raw materials to a certain extent. After the runner is shortened, the flow resistance of the molten plastic in the runner is reduced, which can speed up the injection speed, thereby significantly shortening the injection molding cycle and improving production efficiency to a certain extent. At the same time, due to the shortening of the injection molding cycle, energy consumption and labor costs are also reduced. Furthermore, the shortening of the runner helps the plastic to flow more evenly and quickly in the mold, reduces the generation of defects such as bubbles and shrinkage holes, and improves the dimensional accuracy and surface quality of the product.

[0008] As a preferred embodiment of the present invention, the pad includes a pad A, which is arranged between the upper fixed plate and the flow channel plate. A mounting groove is provided on the side wall of the upper fixed plate close to the pad A, and the mounting groove is used to fix the pad A. A fixing groove is provided on the side wall of the flow channel plate close to the upper fixed plate, and the fixing groove is correspondingly arranged to the mounting groove. The inner wall of the fixing groove cooperates with the side wall of the pad A. The filling nozzle passes through the pad A, and a mounting hole is provided on the side wall of the upper fixed plate away from the filling nozzle. The mounting hole is connected to the mounting groove, and the mounting hole and the mounting groove are coaxially arranged, and the diameter of the mounting hole is smaller than the diameter of the mounting groove.

[0009] By adopting the above technical solution, the position of the filling nozzle is lowered from the upper edge of the upper fixed plate away from the runner plate to the lower edge of the upper fixed plate close to the runner plate, which greatly shortens the distance from the filling nozzle to the runner plate, thereby shortening the length of the longitudinal runner. The upper fixed plate, the pad A and the runner plate are compactly arranged, and the mounting groove abuts against the upper edge of the pad A, restricting the pad A in the fixing groove, which can stably fix the position of the pad A, greatly reducing the shaking of the pad A during the injection process, and further enabling the pad A to effectively fix the filling nozzle, increase the stability of the filling nozzle, and reduce the displacement of the filling nozzle during the injection molding process.

[0010] As a preferred embodiment of the present invention, the pad also includes a pad B, which is arranged between the flow channel plate and the front template. A matching groove is provided on the side wall of the flow channel plate away from the upper fixed plate, and the inner wall of the matching groove matches with the side wall of the pad B. A fixing platform is provided on the side of the front template close to the flow channel plate, and the fixing platform is used to receive the pad B. The filling nozzle passes through the pad B and extends to the front template. The side wall of the pad B abuts against the side wall of the pad A.

[0011] By adopting the above technical solution, the matching groove on the runner plate limits the position of the pad B, and the fixed platform lifts up the pad B. At the same time, the abutment between the pad A and the pad B can increase the integrity and stability between the pad A and the pad B, and reduce the misalignment between the pad A and the pad B. The pad B can increase the fixed surface connection between the pad as a whole and the runner plate, making the structure between the upper fixed plate, the pad and the runner plate more compact, reducing the occurrence of displacement during the injection molding process, thereby increasing the stability of the injection molding, allowing the plastic melt to flow more evenly and quickly in the runner, and improving the quality of the product.

[0012] As a preferred embodiment of the present invention, a first limiting groove is provided on the pad A, the first limiting groove is coaxially provided with the filling nozzle, the outer wall of the filling nozzle cooperates with the inner wall of the first limiting groove, and a limiting platform is provided on the inner wall of the first limiting groove along a tangent line extending toward the nozzle, and the limiting platform abuts against a fixed edge of the filling nozzle.

[0013] By adopting the above technical solution, the head of the filling nozzle is fixed on the pad A through the cooperation between the first limiting groove and the limiting platform. The first limiting groove can provide sufficient installation space for the filling nozzle, and the first limiting groove can limit the lateral movement of the filling nozzle, which increases the stability of the filling nozzle to a certain extent and reduces the shaking of the filling nozzle. At the same time, the limiting platform can effectively limit the longitudinal position of the filling nozzle, reduce the longitudinal movement of the filling nozzle due to excessive pressure during injection molding, and increase the stability and integrity of the entire mold to a certain extent, greatly reducing the occurrence of errors.

[0014] As a preferred embodiment of the present invention, a second limiting groove is formed through the pad B, the end of the filling nozzle away from the pad A is located in the second limiting groove, and the filling nozzle extends to the outside of the second limiting groove, and the second limiting groove is coaxially arranged with the first limiting groove.

[0015] By adopting the above technical solution, the second limiting groove can effectively limit the installation position of the filling nozzle on the pad B. At the same time, the second limiting groove can effectively protect the end of the filling nozzle, reducing the possibility of collision and damage to the end of the filling nozzle during the injection molding process. Furthermore, the second limiting groove can also guide the filling nozzle to be accurately injected into the flow channel, reducing the waste of raw materials, reducing errors in the injection molding process, and improving product quality to a certain extent.

[0016] As a preferred solution of the present invention, the mold opening distance between the flow channel plate and the upper fixed plate is set to 5 mm, and the mold opening distance between the flow channel plate and the front mold plate is set to 100 mm.

[0017] By adopting the above technical solution, sufficient mold opening spacing can ensure that the plastic product can be smoothly ejected from the mold after cooling and solidification, so that the runner plate is completely separated from the front template after demolding, reducing the resistance during mold opening, avoiding product damage or mold jamming, and reducing the wear and failure risk of the mold and injection molding machine. Appropriate mold opening spacing can shorten the injection molding cycle and improve production efficiency. At the same time, it can also reduce downtime and scrap rate caused by mold jamming or damage to plastic products, thereby improving the quality of plastic products and production efficiency.

[0018] As a preferred solution of the present invention, the single-side gap between the pad A and the flow channel plate is 0.5 mm, and the single-side gap between the pad B and the front template is 1 mm.

[0019] By adopting the above technical solution, pad A and pad B will not separate from the runner plate after the mold is opened, and pad A and pad B will not collide with the runner plate and the front template during the injection molding process. To a certain extent, the stability and continuity of the injection molding process can be ensured, and the downtime caused by mold failure can be reduced, thereby improving production efficiency, reducing the wear between pad A and pad B and the runner plate and the front template, and reducing the frequency of mold maintenance and replacement, thereby extending the overall service life of the mold.

[0020] As a preferred solution of the present invention, an injection channel is opened on the side wall of the front template close to the upper fixed plate, an injection cavity is arranged on the front template, the injection channel is connected with the injection cavity, and a guiding slope is arranged on the side of the injection channel.

[0021] By adopting the above technical scheme, the flow rate of the molten plastic can be well controlled, and the inclined guide bevel can change the flow direction of the molten plastic in the flow channel, thereby effectively controlling its flow rate. During the injection molding process, the molten plastic is injected into the mold cavity under high pressure, and the inclined guide bevel can guide the plastic to flow in one direction to prevent it from flowing back when the injection pressure drops or the mold is opened. This helps to avoid defects such as short shots and bubbles to a certain extent, thereby improving the yield of the product. At the same time, during the demolding process, the inclined guide bevel can also reduce the demolding resistance between the injection molded part and the mold to a certain extent, making it easier for the injection molded part to be demolded from the mold, reducing the risk of mold wear and damage to the injection molded part.

[0022] In summary, the present invention includes at least one of the following beneficial technical effects: 1. The present invention can reduce the travel of the nozzle on the upper fixed plate by setting a pad, so that the nozzle is directly connected to the flow channel plate through the pad, thereby effectively shortening the flow channel and increasing the stability of the nozzle; a shorter flow channel means less plastic material remains in the flow channel, which reduces the waste of raw materials to a certain extent. After the flow channel is shortened, the flow resistance of the molten plastic in the flow channel is reduced, which can speed up the injection speed, thereby significantly shortening the injection cycle and improving the production efficiency to a certain extent. At the same time, due to the shortening of the injection cycle, energy consumption and labor costs are also reduced. Furthermore, the shortening of the flow channel helps the plastic to flow more evenly and quickly in the mold, reduces the generation of defects such as bubbles and shrinkage holes, and improves the dimensional accuracy and surface quality of the product; 2. The present invention connects the pad A with the upper fixed plate, connects the pad B with the flow channel plate, and makes the pad A and the pad B fit closely together. The position of the injection nozzle is lowered from the upper edge of the upper fixed plate away from the flow channel plate to the lower edge of the upper fixed plate close to the flow channel plate, which greatly shortens the distance from the injection nozzle to the flow channel plate, thereby shortening the length of the longitudinal flow channel. The upper fixed plate, the pad A and the flow channel plate are compactly arranged, and the mounting groove abuts against the upper edge of the pad A, which restricts the pad A in the fixing groove, and can stably fix the position of the pad A, thereby greatly reducing the shaking of the pad A during the injection process, and further enabling the pad A to effectively fix the injection nozzle. Increase the stability of the nozzle and reduce the displacement of the nozzle during the injection molding process. The matching groove on the runner plate limits the position of the pad B, and the fixed platform lifts the pad B. At the same time, the abutment between the pad A and the pad B can increase the integrity and stability between the pad A and the pad B, and reduce the misalignment between the pad A and the pad B. The pad B can increase the fixed surface connection between the pad as a whole and the runner plate, making the structure between the upper fixed plate, the pad and the runner plate more compact, reducing the displacement during the injection molding process, thereby increasing the stability of the injection molding, allowing the plastic melt to flow more evenly and quickly in the runner, and improving the quality of the product; 3. The present invention sets a single-sided gap between the filling nozzle and the pad. The single-sided gap can effectively reduce the flow resistance at the runner gate, so that the plastic melt can smoothly enter the mold cavity through the runner gate. The single-sided gap between the filling nozzle and the pads A and B can also serve as an exhaust channel to help remove air and volatiles in the mold cavity and reduce bubbles and defects in the injection molded products. Furthermore, the single-sided gap design can simplify the overall structure of the model, reduce unnecessary processing and assembly work, thereby reducing the manufacturing cost of the mold, while reducing the overall complexity and processing difficulty of the mold, and can also improve the production efficiency and stability of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of a mold for shortening a product flow channel according to an embodiment of the present invention.

[0024] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part A.

[0025] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of part B.

[0026] Figure 4 Yes Figure 2 Schematic diagram of the enlarged structure of part C.

[0027] Explanation of the accompanying drawings: 1. Upper fixed plate; 11. Mounting groove; 12. Mounting hole; 2. Molding component; 21. Runner plate; 211. Fixing groove; 212. Matching groove; 22. Filling nozzle; 23. Front template; 231. Fixing platform; 232. Injection runner; 233. Injection cavity; 234. Guide slope; 235. Positioning guide column; 24. Rear template; 25. Positioning guide sleeve; 3. Pad; 31. Pad A; 311. First limiting groove; 312. Limiting platform; 32. Pad B; 321. Second limiting groove. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 The present invention is described in further detail.

[0029] The embodiment of the present invention discloses a mold for shortening the product flow path. Figure 1 and Figure 2 A mold for shortening a product flow path includes an upper fixed plate 1, a molding component 2 and a pad 3, wherein the upper fixed plate 1 is used to fix the pad 3 on the molding component 2; the molding component 2 includes a flow path plate 21, a front template 23, a rear template 24 and a nozzle 22, the upper fixed plate 1, the flow path plate 21, the front template 23 and the rear template 24 are installed in sequence in the longitudinal direction, and the pad 3 is passed through them; the nozzle 22 passes through the upper fixed plate 1 and the pad 3, and the nozzle 22 extends to the flow path plate 21, and the nozzle 22 is used for spraying plastic melt.

[0030] The travel of the filling nozzle 22 on the upper fixed plate 1 can be reduced, so that the filling nozzle 22 is directly connected to the flow channel plate 21 through the pad 3, thereby effectively shortening the longitudinal flow channel and increasing the stability of the filling nozzle 22; a shorter flow channel means that less plastic material remains in the flow channel, which reduces the waste of raw materials to a certain extent. After the flow channel is shortened, the flow resistance of the molten plastic in the flow channel is reduced, which can speed up the injection speed, thereby significantly shortening the injection molding cycle and improving the production efficiency to a certain extent. At the same time, due to the shortening of the injection molding cycle, energy consumption and labor costs are also reduced. Furthermore, the shortening of the flow channel helps the plastic to flow more evenly and quickly in the mold, reduces the generation of defects such as bubbles and shrinkage holes, and improves the dimensional accuracy and surface quality of the product.

[0031] The pad 3 is connected to the upper fixing plate 1 and the flow channel plate 21 by bolts. The pad 3 includes a pad A and a pad B. The pad A is arranged between the upper fixing plate 1 and the flow channel plate 21. A mounting groove 11 is opened on the side wall of the upper fixing plate 1 close to the pad A. The mounting groove 11 is used to fix the pad A. A fixing groove 211 is opened on the side wall of the flow channel plate 21 close to the upper fixing plate 1. The fixing groove 211 is arranged corresponding to the mounting groove 11. The inner wall of the fixing groove 211 cooperates with the side wall of the pad A. The filling nozzle 22 passes through the pad A. A mounting hole 12 is opened on the side wall of the upper fixing plate 1 away from the filling nozzle 22. The mounting hole 12 is connected with the mounting groove 11, and the mounting hole 12 is coaxial with the mounting groove 11. The diameter of the mounting hole 12 is smaller than the diameter of the mounting groove 11.

[0032] The position of the filling nozzle 22 is lowered from the upper edge of the upper fixed plate 1 away from the flow channel plate 21 to the lower edge of the upper fixed plate 1 close to the flow channel plate 21, which greatly shortens the distance from the filling nozzle 22 to the flow channel plate 21, thereby shortening the length of the longitudinal flow channel. The upper fixed plate 1, the pad A and the flow channel plate 21 are compactly arranged, and the mounting groove 11 abuts against the upper edge of the pad A, restricting the pad A in the fixing groove 211, which can stably fix the position of the pad A, greatly reducing the shaking of the pad A during the injection process, and further enabling the pad A to effectively fix the filling nozzle 22, increase the stability of the filling nozzle 22, and reduce the displacement of the filling nozzle 22 during the injection molding process.

[0033] The pad B is arranged between the flow channel plate 21 and the front template 23. A matching groove 212 is opened on the side wall of the flow channel plate 21 away from the upper fixed plate 1. The inner wall of the matching groove 212 matches with the side wall of the pad B. A fixing platform 231 is arranged on the side of the front template 23 close to the flow channel plate 21. The fixing platform 231 is used to receive the pad B. The filling nozzle 22 passes through the pad B and extends to the front template 23. The side wall of the pad B abuts against the side wall of the pad A.

[0034] The mating groove 212 on the runner plate 21 limits the position of the pad B, and the fixed platform 231 lifts the pad B. At the same time, the abutment between the pad A and the pad B can increase the integrity and stability between the pad A and the pad B, and reduce the misalignment between the pad A and the pad B. The pad B can increase the fixed surface connection between the pad 3 as a whole and the runner plate 21, so that the structure between the upper fixed plate 1, the pad 3 and the runner plate 21 is more compact, and the displacement during the injection molding process is reduced, thereby increasing the stability of the injection molding, allowing the plastic melt to flow more evenly and quickly in the runner, and improving the quality of the product.

[0035] Reference Figure 3A first limiting groove 311 is formed through the backing plate A, and the first limiting groove 311 is formed coaxially with the filling nozzle 22. The outer wall of the filling nozzle 22 cooperates with the inner wall of the first limiting groove 311. A limiting platform 312 is formed on the inner wall of the first limiting groove 311 along a tangent line extending toward the nozzle, and the limiting platform 312 abuts against the fixed edge of the filling nozzle 22. A second limiting groove 321 is formed through the backing plate B, and the end of the filling nozzle 22 away from the backing plate A is located in the second limiting groove 321, and the filling nozzle 22 extends to the outside of the second limiting groove 321, and the first limiting groove 311 is coaxially arranged with the second limiting groove 321.

[0036] The head of the filling nozzle 22 is fixed on the pad A through the cooperation between the first limiting groove 311 and the limiting platform 312. The first limiting groove 311 can provide sufficient installation space for the filling nozzle 22, and the first limiting groove 311 can limit the lateral movement of the filling nozzle 22, thereby increasing the stability of the filling nozzle 22 to a certain extent and reducing the shaking of the filling nozzle 22. At the same time, the limiting platform 312 can effectively limit the longitudinal position of the filling nozzle 22, thereby reducing the longitudinal movement of the filling nozzle 22 due to excessive pressure during injection molding, thereby increasing the stability and integrity of the entire mold to a certain extent and greatly reducing the occurrence of errors.

[0037] The second limiting groove 321 can effectively limit the installation position of the filling nozzle 22 on the pad B. At the same time, the second limiting groove 321 can effectively protect the end of the filling nozzle 22, thereby reducing the possibility of collision and damage to the end of the filling nozzle 22 during the injection molding process. Furthermore, the second limiting groove 321 can also guide the filling nozzle 22 to be accurately injected into the flow channel, thereby reducing the waste of raw materials and the mistakes in the injection molding process, thereby improving the product quality to a certain extent.

[0038] The mold opening distance between the flow channel plate 21 and the upper fixed plate 1 is set to 5 mm, and the mold opening distance between the flow channel plate 21 and the front mold plate 23 is set to 100 mm.

[0039] Sufficient mold opening spacing can ensure that the plastic product can be smoothly ejected from the mold after cooling and solidification, so that the runner plate 21 and the front template 23 are completely separated after demolding, reducing the resistance during mold opening, avoiding product damage or mold jamming, and reducing the wear and failure risk of the mold and injection molding machine. Appropriate mold opening spacing can shorten the injection molding cycle and improve production efficiency. At the same time, it can also reduce downtime and scrap rate caused by mold jamming or damage to plastic products, thereby improving the quality of plastic products and production efficiency.

[0040] The single-side gap between the pad A and the flow channel plate 21 is 0.5 mm, and the single-side gap between the pad B and the front template 23 is 1 mm.

[0041] This ensures that pad A and pad B will not separate from the runner plate 21 after the mold is opened, and that pad A and pad B will not collide with the runner plate 21 and the front template 23 during the injection molding process. To a certain extent, this ensures the stability and continuity of the injection molding process, reduces downtime caused by mold failure, thereby improving production efficiency, reducing wear between pad A and pad B and the runner plate 21 and the front template 23, and reducing the frequency of mold maintenance and replacement, thereby extending the overall service life of the mold.

[0042] The single-side gap between the filling nozzle 22 and the backing plate B and the backing plate A is 0.5 mm.

[0043] The single-sided gap set between the filling nozzle 22 and the pad 3 can effectively reduce the flow resistance at the runner gate, so that the plastic melt can smoothly enter the mold cavity through the runner gate. The single-sided gap between the filling nozzle 22 and the pads A and B can also serve as an exhaust channel to help remove air and volatiles in the mold cavity and reduce bubbles and defects in the injection molded products. Furthermore, the single-sided gap design can simplify the overall structure of the model, reduce unnecessary processing and assembly work, thereby reducing the manufacturing cost of the mold, while reducing the overall complexity and processing difficulty of the mold, and can also improve the production efficiency and stability of the mold.

[0044] Reference Figure 1 and Figure 4 An injection channel 232 is provided on the side wall of the front template 23 close to the upper fixed plate. A cavity is provided on the front template 23 . The injection channel 232 is connected to the cavity. A guiding slope 234 is provided on the side of the injection channel 232 .

[0045] The flow rate of the molten plastic can be well controlled. The inclined guide bevel 234 can change the flow direction of the molten plastic in the flow channel, thereby effectively controlling its flow rate. During the injection molding process, the molten plastic is injected into the mold cavity under high pressure. The inclined guide bevel 234 can guide the plastic to flow in one direction to prevent it from flowing back when the injection pressure drops or the mold is opened. This helps to avoid defects such as short shots and bubbles to a certain extent, thereby improving the product yield. At the same time, during the demolding process, the inclined guide bevel 234 can also reduce the demolding resistance between the injection molded part and the mold to a certain extent, making it easier for the injection molded part to be demolded from the mold, reducing the risk of mold wear and damage to the injection molded part.

[0046] Reference Figure 1 The front template 23 and the rear template 24 are molded together during the injection molding process. A positioning guide post 235 is fixedly connected to the side wall of the front template 23 close to the rear template 24. The positioning guide post 235 is tilted. A positioning guide sleeve 25 is provided on the side wall of the rear template 24 close to the positioning guide post 235. The positioning guide sleeve 25 is set corresponding to the positioning guide post 235.

[0047] During the injection molding process, the mold needs to undergo opening and closing movements. The design of the inclined positioning guide post 235 and the positioning guide sleeve 25 helps to maintain the stability of the mold during the opening and closing process, prevents the mold from shifting or shaking due to uneven force, thereby ensuring the accuracy and consistency of the injection molded product. The positioning guide post 235 and the guide sleeve are tilted. At the same time, by tilting the positioning guide post 235 and the positioning guide sleeve 25, not only the necessary support force is provided for the mold, but also a certain impact and stress can be withstood during the opening and closing process of the mold, maintaining the stability and firmness of the mold. Further, the tilting of the positioning guide post 235 and the positioning guide sleeve 25 helps to reduce the direct friction and collision of the mold during the opening and closing process to a certain extent, thereby extending the service life of the mold. At the same time, the cooperation of the positioning guide post 235 and the positioning guide sleeve 25 can also prevent the front template 23 and the rear template 24 from direct contact, further reducing wear and fatigue.

[0048] In the present invention, except for the forming component 2, the upper fixing plate 1 and the backing plate 3, the rest of the structures are the same as those in the prior art, and will not be described in detail herein.

[0049] The structures of the forming component 2, the upper fixing plate 1 and the backing plate 3 in the present invention can be used in a two-plate mold or a three-plate mold mold structure.

[0050] The implementation principle of a mold for shortening a product flow channel in an embodiment of the present invention is as follows: during the injection molding process, pad A and pad B can fix the nozzle 22 on the injection mold, and shorten the longitudinal distance between the nozzle 22 and the flow channel plate 21 to the longitudinal distance from the bottom of pad A to the flow channel plate 21, thereby greatly reducing the instability of the nozzle 22, shortening the flow channel distance, and reducing the waste of injection molding raw materials during the injection molding process.

[0051] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A mold for shortening a product flow path, comprising a molding component (2) and an upper fixing plate (1), characterized in that: The upper fixing plate (1) is detachably connected to a backing plate (3), the upper fixing plate (1) being used to fix the backing plate (3) on the molding component (2), the molding component (2) comprising a flow channel plate (21), a front mold plate (23), a rear mold plate (24) and a filling nozzle (22), the backing plate (3) being arranged between the upper fixing plate (1) and the front mold plate (23), the filling nozzle (22) passing through the upper fixing plate (1) and the backing plate (3), and the filling nozzle (22) extending to the flow channel On the plate (21), the injection nozzle (22) is used for spraying plastic melt, and the front template (23) and the rear template (24) are used to form a cavity; a positioning guide column (235) is fixedly connected to the side wall of the front template (23) close to the rear template (24), and the positioning guide column (235) is inclined; a positioning guide sleeve (25) is opened on the side wall of the rear template (24) close to the positioning guide column (235), and the positioning guide sleeve (25) is arranged corresponding to the positioning guide column (235).

2. A mold for shortening a product flow channel according to claim 1, characterized in that: The pad (3) comprises a pad A, the pad A being arranged between the upper fixing plate (1) and the flow channel plate (21); a mounting groove (11) being provided on a side wall of the upper fixing plate (1) close to the pad A; the mounting groove (11) being used to fix the pad A; a fixing groove (211) being provided on a side wall of the flow channel plate (21) close to the upper fixing plate (1); the fixing groove (211) being arranged corresponding to the mounting groove (11); an inner wall of the fixing groove (211) being matched with the side wall of the pad A; the injection nozzle (22) passing through the pad A; a mounting hole (12) being provided on a side wall of the upper fixing plate (1) away from the injection nozzle (22); the mounting hole (12) being communicated with the mounting groove (11); the mounting hole (12) and the mounting groove (11) being coaxially arranged; and a diameter of the mounting hole (12) being smaller than a diameter of the mounting groove (11).

3. A mold for shortening a product flow channel according to claim 1, characterized in that: The pad (3) further comprises a pad B, wherein the pad B is arranged between the flow channel plate (21) and the front template (23); a matching groove (212) is provided on a side wall of the flow channel plate (21) away from the upper fixed plate (1); an inner wall of the matching groove (212) matches with a side wall of the pad B; a fixing platform (231) is provided on a side of the front template (23) close to the flow channel plate (21); the fixing platform (231) is used to receive the pad B; the filling nozzle (22) passes through the pad B and extends to the front template (23); and the side wall of the pad B abuts against the side wall of the pad A.

4. A mold for shortening a product flow channel according to claim 3, characterized in that: A first limiting groove (311) is provided through the pad A, the first limiting groove (311) is coaxially provided with the filling nozzle (22), the outer wall of the filling nozzle (22) cooperates with the inner wall of the first limiting groove (311), a limiting platform (312) is provided on the inner wall of the first limiting groove (311) along a tangent line extending toward the nozzle, and the limiting platform (312) abuts against a fixed edge of the filling nozzle (22).

5. A mold for shortening a product flow channel according to claim 4, characterized in that: A second limiting groove (321) is formed through the backing plate B, and the end of the filling nozzle (22) away from the backing plate A is located in the second limiting groove (321), and the filling nozzle (22) extends to the outside of the second limiting groove (321), and the second limiting groove (321) is coaxially arranged with the first limiting groove (311).

6. A mold for shortening a product flow channel according to claim 1, characterized in that: The mold opening distance between the flow channel plate (21) and the upper fixed plate (1) is set to 5 mm, and the mold opening distance between the flow channel plate (21) and the front mold plate (23) is set to 100 mm.

7. A mold for shortening a product flow path according to claim 2, characterized in that: The single-side gap between the pad A and the flow channel plate (21) is 0.5 mm, and the single-side gap between the pad B and the front template (23) is 1 mm.

8. A mold for shortening a product flow channel according to claim 7, characterized in that: An injection molding channel (232) is provided on the side wall of the front mold plate (23) close to the upper fixed plate, a mold cavity is provided on the front mold plate (23), the injection molding channel (232) is connected to the mold cavity, and a guiding inclined surface (234) is provided on the side of the injection molding channel (232).

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