Injection mold structure for PA6 strip-shaped thin-wall product

Abstract

The utility model relates to the technical field of injection molding, and discloses a PA6 strip-shaped thin-wall product injection mold structure which comprises a base, a lower mold is arranged at the top end of the base, a mold cavity is formed in the lower mold, an upper mold is arranged at the top end of the lower mold, and a runner is formed in the upper mold. According to the injection mold structure for the PA6 strip-shaped thin-wall product, the runner, the feeding pipe and the eccentric feeding opening are arranged, the eccentric feeding opening is an eccentric small water opening, it can be ensured that materials can flow into the lower mold from multiple directions by arranging the eccentric feeding opening, incomplete filling and bubble generation are avoided, and the production efficiency is improved. By arranging the runner and the feeding pipe, the uniform flowing of the PA6 material in the mold cavity can be ensured, especially on the thin-wall and slender parts, the problems of flowing dead angles and incomplete filling are avoided, so that the product quality can be improved, and the problem that the product quality is easily influenced due to the phenomena of non-uniform raw material flowing and incomplete filling is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding technical field, concretely is a kind of PA6 strip thin-walled product injection mold structure. BACKGROUND

[0002] PA6 (polyamide 6) material is widely used in strip thin-walled product in automobile, electronic, household appliance and other industries due to its good wear resistance, strength and heat resistance. However, in the injection molding process of strip thin-walled product, especially when using PA6 material, it often faces problems such as poor flowability, filling difficulty, long molding cycle and the like. Due to the complex shape of thin-walled design and long strip, the material often cannot uniformly fill the mold cavity, resulting in incomplete filling, bubbles, shrinkage and warping and other defects. Therefore, how to optimize the mold design to ensure that PA6 material can smoothly fill the mold and maintain good molding quality has become a technical problem in the current injection molding field. SUMMARY

[0003] The utility model aims at providing a kind of PA6 strip thin-walled product injection mold structure to solve the phenomenon that raw material flows unevenly and is not completely filled in use in the above background art, and the problem that product quality is easily affected.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of PA6 strip thin-walled product injection mold structure, including base, the top of the base is provided with lower mould, the inside of the lower mould is provided with mold cavity, the top of the lower mould is provided with upper mould, the inside of the upper mould is provided with flow channel, the rear end and the left and right sides of the top of the flow channel are installed eccentric feed port, the bottom of the flow channel is fixedly connected with feed pipe, the bottom of the right side of the lower mould is fixedly connected with drain pipe, the front end of the drain pipe is provided with valve.

[0005] As a further technical scheme of the utility model, the feed pipe is provided with multiple groups, and the feed pipes are arranged at equal intervals at the bottom end of the flow channel.

[0006] As a further technical scheme of the utility model, the outside of the lower mould and the upper mould is coated with wear-resistant coating respectively, and the lower mould and the upper mould are aligned.

[0007] As a further technical scheme of the utility model, the left side of the top of the base is provided with cooling water tank, the top of the cooling water tank is installed with second water pump, the input end of the second water pump is fixedly connected with connecting pipe, the output end of the second water pump is fixedly connected with cooling pipe, the bottom of the front end of the cooling water tank is installed with first water pump, the input end and the output end of the first water pump are fixedly connected with liquid inlet pipe respectively, the right side of the inside top of the lower mould is installed with temperature sensor.

[0008] As a further technical scheme of the utility model, the cooling pipe is wound outside the mold cavity, and the bottom end on the left side of the cooling pipe penetrates into the inside of the cooling water tank.

[0009] As a further technical scheme of the utility model, the left and right sides of the liquid inlet pipe penetrate into the inside of the cooling water tank and the lower mold respectively, and the cooling pipe penetrates into the upper and lower ends on the left side of the inside of the lower mold.

[0010] As a further technical scheme of the utility model, the left side of the top end of the upper mold is provided with an air pump, the output end and the input end of the air pump are fixedly connected with air pipes respectively, the left side between the air pipes is provided with a filter box, the air pipes are fixedly connected in the inside of the upper mold, the top end of the filter box is provided with a connecting plate, the top end of the connecting plate is provided with a handle, the left and right sides of the bottom end of the connecting plate are fixedly connected with filter screen plates, and the filter screen plates are arranged on the left and right sides in the inside of the filter box.

[0011] As a further technical scheme of the utility model, the rear end of the top of the upper mold is provided with a support frame, the top end of the support frame is provided with a plurality of injectors, the bottom end of the plurality of injectors is provided with a discharge pipe, and the discharge pipe is arranged in the inside of the eccentric feeding port.

[0012] Compared with the prior art, the PA6 strip-shaped thin-walled product injection mold structure not only avoids the phenomena of uneven flow and incomplete filling, improves the uniformity of mold cooling, and makes the gas discharge smooth.

[0013] (1) By setting the flow channel, the feeding pipe and the eccentric feeding port, the eccentric feeding port is an eccentric small water gap, the setting of the eccentric feeding port can ensure that the material can flow into the lower mold from multiple directions, avoid incomplete filling and bubble generation, the setting of the flow channel and the feeding pipe can ensure that the PA6 material flows uniformly in the mold cavity, especially in the thin-walled and slender parts, avoid the problems of flow dead angle and incomplete filling, thereby the quality of the product can be improved;

[0014] (2) By setting the first water pump, the cooling water tank, the cooling pipe, the connecting pipe, the second water pump, the temperature sensor and the liquid inlet pipe, the second water pump is started, the second water pump draws the cooling water in the inside of the cooling water tank into the inside of the cooling pipe through the connecting pipe, since the cooling pipe is wound outside the mold cavity, the raw material in the inside of the mold cavity can be cooled, the temperature sensor can detect the temperature in the inside of the lower mold, when the temperature in the inside of the lower mold is high, the first water pump is started, the first water pump can draw the cooling liquid in the inside of the cooling water tank into the inside of the lower mold through the liquid inlet pipe, thereby the inside of the lower mold can be further cooled to cool the product in the inside of the mold cavity, the uniformity of the mold cooling is improved, and the warping and size instability in the forming process are reduced;

[0015] (3) by being provided with the air pump, the filter box, the air pipe, the multi-section injector, the discharge pipe, the feeding pipe, the filter screen plate and the connecting plate, the multi-section injector can be accurately controlled in injection pressure and speed, uniform filling and high-quality forming of the thin-walled strip-shaped product are ensured, the air pump is started when exhaust is needed, the air pump extracts the gas inside the lower mold through the air pipe, the gas is quickly discharged, the air pump and the multi-section injector ensure smooth gas discharge during the injection molding process, and the appearance and strength of the product are guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view sectional structure schematic view of the utility model;

[0017] Figure 2 It is a front view sectional structure schematic view of the filter box of the utility model;

[0018] Figure 3 It is a front view structure schematic view of the cooling water tank of the utility model;

[0019] Figure 4 It is a front view structure schematic view of the utility model; Figure 1 It is a sectional structure schematic view of the utility model.

[0020] In the drawing: 1, base; 2, lower mold; 3, first water pump; 4, cooling water tank; 5, cooling pipe; 6, connecting pipe; 7, second water pump; 8, upper mold; 9, air pump; 10, filter box; 11, air pipe; 12, support frame; 13, multi-section injector; 14, discharge pipe; 15, flow channel; 16, feeding pipe; 17, temperature sensor; 18, mold cavity; 19, valve; 20, liquid discharge pipe; 21, filter screen plate; 22, connecting plate; 23, handle; 24, liquid inlet pipe; 25, eccentric feeding port. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] Please refer to Figures 1-4The utility model provides a kind of embodiment;A PA6 strip thin-walled product injection mold structure, including pedestal 1, the top of pedestal 1 is provided with lower mould 2, the inside of lower mould 2 is provided with mould cavity 18, the top of lower mould 2 is provided with upper mould 8, the inside of upper mould 8 is provided with runner 15, the rear end of the top of runner 15 is installed eccentric feed port 25 with left and right sides, the bottom end of runner 15 is fixedly connected with feed pipe 16, the bottom end of lower mould 2 right side is fixedly connected with drain pipe 20, the front end of drain pipe 20 is provided with valve 19;

[0023] Feed pipe 16 is provided with multiple groups, and the bottom end of the runner 15 is arranged at equal intervals. The outer parts of the lower mould 2 and the upper mould 8 are respectively coated with a wear-resistant coating. The lower mould 2 and the upper mould 8 are aligned.

[0024] Specifically, as shown in Figure 1 and Figure 4 , the eccentric feed port 25 is an eccentric small nozzle. By setting the eccentric feed port 25, it can ensure that the material flows into the lower mould 2 from multiple directions, avoiding incomplete filling and bubble generation. By setting the runner 15 and the feed pipe 16, it can ensure that the PA6 material flows uniformly in the mould cavity 18, especially in the thin-walled and slender parts, avoiding flow dead angles and incomplete filling problems, thereby improving the quality of the product.

[0025] The left side of the top of the pedestal 1 is provided with a cooling water tank 4. The top of the cooling water tank 4 is installed with a second water pump 7. The input end of the second water pump 7 is fixedly connected with a connecting pipe 6. The output end of the second water pump 7 is fixedly connected with a cooling pipe 5. The bottom of the front end of the cooling water tank 4 is installed with a first water pump 3. The input end and the output end of the first water pump 3 are respectively fixedly connected with a liquid inlet pipe 24. The right side of the inside top of the lower mould 2 is installed with a temperature sensor 17. The cooling pipe 5 is wound outside the mould cavity 18. The bottom end of the left side of the cooling pipe 5 penetrates into the inside of the cooling water tank 4. The left and right sides of the liquid inlet pipe 24 respectively penetrate into the inside of the cooling water tank 4 and the lower mould 2. The cooling pipe 5 penetrates the upper and lower ends of the left side of the inside of the lower mould 2.

[0026] Specifically, as shown in Figure 1 and Figure 3 , the second water pump 7 is started. The second water pump 7 draws the cooling water inside the cooling water tank 4 into the inside of the cooling pipe 5 through the connecting pipe 6. Since the cooling pipe 5 is wound outside the mould cavity 18, the raw material inside the mould cavity 18 can be cooled. The temperature sensor 17 can detect the temperature inside the lower mould 2. When the temperature inside the lower mould 2 is high, the first water pump 3 is started. The first water pump 3 can draw the cooling liquid inside the cooling water tank 4 into the inside of the lower mould 2 through the liquid inlet pipe 24, thereby further cooling the inside of the lower mould 2 and cooling the product inside the mould cavity 18, improving the uniformity of the mould cooling and reducing the warping and size instability in the forming process.

[0027] The left side of the top end of the upper mold 8 is provided with an air pump 9, and the output end and the input end of the air pump 9 are fixedly connected with air pipes 11, respectively. The left side between the air pipes 11 is provided with a filter box 10, the air pipes 11 are fixedly connected in the inside of the upper mold 8, the top end of the filter box 10 is provided with a connecting plate 22, the top end of the connecting plate 22 is provided with a handle 23, the left and right sides of the bottom end of the connecting plate 22 are fixedly connected with filter screen plates 21, the filter screen plates 21 are arranged on the left and right sides in the inside of the filter box 10, the top end of the upper mold 8 is provided with a supporting frame 12, the top end of the supporting frame 12 is provided with multi-section injectors 13, the bottom end of the multi-section injectors 13 is provided with a discharge pipe 14, and the discharge pipe 14 is arranged in the inside of the eccentric feeding port 25;

[0028] Specifically, as shown in Figure 1 、 Figure 2 and Figure 4 , the multi-section injectors 13 can control the injection pressure and speed accurately, ensure the uniform filling and high-quality forming of the thin-walled strip-shaped product, the air pump 9 is started when exhaust is needed, the air pump 9 draws out the gas in the inside of the lower mold 2 through the air pipes 11, and the gas is quickly discharged. The air pump 9 and the multi-section injectors 13 ensure the smooth exhaust during the injection molding process, and ensure the appearance and strength of the product.

[0029] Working principle: the utility model discloses in use, eccentric feed inlet 25 is eccentric small water gap, through setting eccentric feed inlet 25 can ensure that material can flow into lower mould 2 from multiple directions, avoid filling and bubble generation not completely, set up runner 15 and feed pipe 16 can ensure that PA6 material evenly flows in mould cavity 18, especially in thin wall and slender part, avoid flowing dead angle and filling not completely problem, can improve the quality of product, set up multistage injector 13 can through accurate control injection pressure and speed, ensure thin wall strip product's even filling and high quality forming, need when starting second water pump 7, second water pump 7 passes through connecting pipe 6 and extracts cooling water in cooling water tank 4 to the inside of cooling pipe 5, because cooling pipe 5 is around the outside of mould cavity 18, can make the raw material cooling of mould cavity 18 inside, temperature sensor 17 can detect the temperature in lower mould 2, when the temperature in lower mould 2 is higher, starting first water pump 3, first water pump 3 can pass through liquid inlet pipe 24 and extract cooling liquid in cooling water tank 4 to the inside of lower mould 2, to further cool the inside of lower mould 2 and make the product in mould cavity 18 cool, when cooling liquid temperature is higher, open valve 19, and cooling liquid is discharged through liquid outlet pipe 20 in the inside of lower mould 2, then reextract cooling liquid and make cooling liquid enter the inside of lower mould 2, improve the uniformity of the mould cooling, reduce the warping and size instability in the forming process, need when starting air pump 9, air pump 9 passes through gas pipe 11 and extracts the gas in the inside of lower mould 2, and the gas is discharged quickly, set up air pump 9 and multistage injector 13 ensure that the gas emission is smooth in injection molding process, guarantee product appearance and strength, filter screen 21 can filter the gas, and the gas is discharged after filtering.

[0030] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. Thus, the foregoing embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the present application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No limitation is intended to the scope of the claims based on any embodiment illustrated in the drawings.

Claims

1. A PA6 strip thin-walled product injection mold structure comprising a base (1), characterized in that: The top end of the base (1) is provided with a lower mold (2), the inside of the lower mold (2) is provided with a mold cavity (18), the top end of the lower mold (2) is provided with an upper mold (8), the inside of the upper mold (8) is provided with a runner (15), the rear end and the left and right sides of the top of the runner (15) are provided with eccentric feeding ports (25), and the bottom end of the runner (15) is fixedly connected with a feeding pipe (16).

2. The PA6 strip thin-walled product injection mold structure according to claim 1, characterized in that: The feeding pipe (16) is provided with multiple groups, and the feeding pipes (16) are arranged at equal intervals at the bottom end of the runner (15).

3. The PA6 strip thin-walled product injection mold structure according to claim 1, characterized in that: The outer parts of the lower mold (2) and the upper mold (8) are respectively coated with wear-resistant coatings, and the lower mold (2) and the upper mold (8) are aligned.

4. The PA6 strip thin-walled product injection mold structure according to claim 1, characterized in that: The top end of the base (1) is provided with a cooling water tank (4), the top end of the cooling water tank (4) is provided with a second water pump (7), the input end of the second water pump (7) is fixedly connected with a connecting pipe (6), the output end of the second water pump (7) is fixedly connected with a cooling pipe (5), the bottom end of the front end of the cooling water tank (4) is provided with a first water pump (3), the input end and the output end of the first water pump (3) are respectively fixedly connected with liquid inlet pipes (24), and the right side of the top end of the inside of the lower mold (2) is provided with a temperature sensor (17).

5. The PA6 strip thin-walled product injection mold structure according to claim 4, characterized in that: The cooling pipe (5) is wound outside the mold cavity (18), and the bottom end of the left side of the cooling pipe (5) penetrates into the inside of the cooling water tank (4).

6. The PA6 strip thin-walled product injection mold structure according to claim 4, characterized in that: The left and right sides of the liquid inlet pipe (24) penetrate into the inside of the cooling water tank (4) and the lower mold (2) respectively, and the cooling pipe (5) penetrates into the upper and lower ends of the left side of the inside of the lower mold (2).

7. The PA6 strip thin-walled product injection mold structure according to claim 1, characterized in that: The left side of the top end of the upper mold (8) is provided with an air pump (9), the output end and the input end of the air pump (9) are respectively fixedly connected with air pipes (11), the left side between the air pipes (11) is provided with a filter box (10), the air pipes (11) are fixedly connected in the inside of the upper mold (8), the top end of the filter box (10) is provided with a connecting plate (22), the top end of the connecting plate (22) is provided with a handle (23), the left and right sides of the bottom end of the connecting plate (22) are fixedly connected with filter screen plates (21), and the filter screen plates (21) are arranged on the left and right sides in the inside of the filter box (10).

8. The PA6 strip thin-walled product injection mold structure according to claim 1, characterized in that: The rear end of the top of the upper mold (8) is provided with a support frame (12), the top end of the support frame (12) is provided with multiple injectors (13), the bottom end of the multiple injectors (13) is provided with a discharge pipe (14), and the discharge pipe (14) is arranged in the inside of the eccentric feeding port (25).

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