Mold structure for small-nozzle eccentric thin wall and used in climbing injection molding process

Abstract

The utility model discloses a mold structure for a small water gap eccentric thin wall in a climbing injection molding process, which comprises a base, and a lower mold seat is fixedly arranged in the middle of the top end of the base. Smooth flowing of plastics can be ensured, uneven flowing can be reduced, defects caused by uneven flowing in the injection molding process are avoided, the climbing part is arranged in the flow guide channel, smooth flowing of plastic materials in the mold can be ensured, the problems of uneven cooling and bubbles caused by flow speed changes are avoided, and the injection molding quality is improved. The multiple eccentric small water openings are formed, multi-section injection can be conducted at the same time, then the injection molding efficiency is improved, an air cooler is powered on to generate cold air, the cold air is guided into a first annular cooling groove and a second cooling groove through an air outlet pipe, then materials in a forming groove can be evenly cooled, and therefore the cooling time is shortened, and the injection molding efficiency is improved. The working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, specifically to a mold structure used in the process of injection molding with small gate, eccentric thin wall and uphill. Background Technology

[0002] Injection molds are tools used for molding plastics. They inject molten plastic into a cavity of a specific shape, which then cools and solidifies to form a plastic product with the desired shape and size. However, existing injection molds are prone to problems such as uneven flow, incomplete filling, uneven cooling, and air bubble formation during processing. Furthermore, they often only have a single small gate and slow cooling speed, resulting in low work efficiency.

[0003] To address the aforementioned issues, a mold structure for eccentric thin-walled injection molding with small gate nozzles and uphill operation is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a mold structure for use in small-nozzle, eccentric, thin-walled, and inclined injection molding processes, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mold structure for eccentric thin-walled injection molding with small sprue nozzles and an incline, comprising a base, a lower mold base fixedly disposed at the center of the top of the base, a second cooling groove being formed inside the lower mold base, a first annular cooling groove being formed at the top of the inner side of the second cooling groove, a cooler being fixedly installed on one side of the lower mold base, an air outlet pipe being fixedly connected to the air outlet end of the cooler, a flow valve being fixedly installed at the end of the air outlet pipe away from the cooler and extending into the interior of the first annular cooling groove, an electric hydraulic rod being fixedly installed at each of the four corners of the top of the base, an upper mold base being fixedly disposed at the top between the four electric hydraulic rods, a plurality of eccentric small sprue nozzles being formed at the top of the upper mold base, a guide channel being formed at the bottom of the inner side of each plurality of eccentric small sprue nozzles, a first direct flow section being formed in each of the plurality of guide channels, an incline section being formed at the bottom of each plurality of first direct flow sections, and a second direct flow section being formed at the end of each plurality of incline section away from the first direct flow section.

[0006] By designing the eccentric small gate of the mold, smooth plastic flow can be ensured and uneven flow can be reduced, avoiding defects caused by uneven flow during injection molding. By setting the ramp in the guide channel, the plastic material can be ensured to flow smoothly in the mold, avoiding problems such as uneven cooling and bubbles caused by changes in flow rate. By setting multiple eccentric small gates, multi-stage injection can be performed simultaneously, thereby improving injection molding efficiency. By powering on the cold air fan, cold air is generated and introduced into the first annular cooling tank and the second cooling tank through the air outlet pipe, which facilitates uniform cooling of the material in the molding tank, thereby shortening the cooling time and improving work efficiency.

[0007] Preferably, both sides of the upper mold base are provided with vents, and the two vents are respectively set with the lower mold base. The setting of two vents can ensure smooth gas discharge during injection molding and avoid the generation of bubbles.

[0008] Preferably, the air inlet of the air cooler is fixedly connected to an air inlet pipe, and the end of the air inlet pipe away from the air cooler is fixedly connected to a filter. The filter can filter the gas entering the air cooler.

[0009] Preferably, an exhaust pipe is fixedly connected to the top of one side of the inner wall of the first annular cooling tank, and a one-way valve is fixedly installed at the end of the exhaust pipe away from the first annular cooling tank to the outside. The exhaust pipe facilitates the discharge of exhaust gas.

[0010] Preferably, a forming groove is provided in the middle of the top of the lower mold base, and the first annular cooling groove and the second cooling groove are provided corresponding to the forming groove. The cooperation of the first annular cooling groove and the second cooling groove facilitates uniform cooling of the material.

[0011] Preferably, positioning holes are provided on all four sides of the top of the lower mold base, and positioning posts are fixedly provided on all four corners of the bottom of the upper mold base. The four positioning holes are respectively engaged with the four positioning posts. The cooperation between the four positioning holes and the four positioning posts facilitates the precise docking of the upper mold base and the lower mold base.

[0012] Preferably, both the surface of the lower mold base and the surface of the first annular cooling groove are provided with wear-resistant layers, and both surfaces of the wear-resistant layers are provided with smooth coatings. The combination of wear-resistant layers and smooth coatings can improve the wear resistance and smoothness of the mold surface.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] By designing the eccentric small gate of the mold, smooth plastic flow can be ensured and uneven flow can be reduced, avoiding defects caused by uneven flow during injection molding. By setting the ramp in the guide channel, the plastic material can be ensured to flow smoothly in the mold, avoiding problems such as uneven cooling and bubbles caused by changes in flow rate. By setting multiple eccentric small gates, multi-stage injection can be performed simultaneously, thereby improving injection molding efficiency. By powering on the cold air fan, cold air is generated and introduced into the first annular cooling tank and the second cooling tank through the air outlet pipe, which facilitates uniform cooling of the material in the molding tank, thereby shortening the cooling time and improving work efficiency. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is a front sectional view of the present invention;

[0017] Figure 3 This is an enlarged view of part A of this utility model;

[0018] Figure 4 This is a cross-sectional view of the upper mold base of this utility model;

[0019] Figure 5 This is a structural diagram of the flow guiding channel of this utility model.

[0020] In the diagram: 1. Base; 2. Lower mold base; 3. First annular cooling tank; 4. Second cooling tank; 5. Exhaust pipe; 6. One-way valve; 7. Air cooler; 8. Air inlet pipe; 9. Filter; 10. Molding groove; 11. Electro-hydraulic rod; 12. Upper mold base; 13. Eccentric small sprue; 14. Guide channel; 141. First direct flow section; 142. Climbing section; 143. Second direct flow section; 15. Exhaust port; 16. Air outlet pipe; 17. Flow valve; 18. Positioning hole; 19. Positioning post; 20. Wear-resistant layer; 21. Smooth coating. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] Please see Figure 1-5This utility model provides a mold structure for eccentric thin-walled injection molding with small sprue nozzles and an incline process. It includes a base 1, a lower mold base 2 fixedly mounted at the center of the top of the base 1, a second cooling groove 4 inside the lower mold base 2, a first annular cooling groove 3 at the top of the inner side of the second cooling groove 4, a cooler 7 fixedly mounted on one side of the lower mold base 2, an exhaust pipe 16 fixedly connected to the exhaust end of the cooler 7, and a flow valve 17 fixedly mounted at the end of the exhaust pipe 16 away from the cooler 7 inside the first annular cooling groove 3. Electric hydraulic rods 11 are fixedly mounted at the four corners of the top of the base 1, an upper mold base 12 fixedly mounted between the four electric hydraulic rods 11, a plurality of eccentric small sprue nozzles 13 at the top of the upper mold base 12, and guide channels 14 at the bottom of the inner side of each of the eccentric small sprue nozzles 13. Each of the guide channels 14 includes a first direct flow section 14. 1. Each of the first direct current sections 141 has a ramp section 142 at its bottom end, and each of the ramp sections 142 has a second direct current section 143 at its end away from the first direct current section 141. By designing the mold gate eccentrically, the plastic flow can be ensured to be smooth and the uneven flow can be reduced, avoiding defects caused by uneven flow during injection molding. By setting the ramp section 142 in the guide channel 14, the plastic material can be ensured to flow smoothly in the mold, avoiding uneven cooling and air bubbles caused by changes in flow rate. By setting multiple eccentric gates 13, multi-stage injection can be performed simultaneously, thereby improving injection molding efficiency. The cold air is generated by energizing the cold air fan 7 and introduced into the first annular cooling tank 3 and the second cooling tank 4 through the air outlet pipe 16, thereby facilitating uniform cooling of the material in the molding tank 10, shortening the cooling time and improving work efficiency.

[0023] Both sides of the upper mold base 12 are provided with exhaust ports 15, and the two exhaust ports 15 are respectively set with the lower mold base 2. The air inlet end of the air cooler 7 is fixedly connected to the air inlet pipe 8, and the end of the air inlet pipe 8 away from the air cooler 7 is fixedly connected to the filter 9. The top of one side of the inner wall of the first annular cooling tank 3 is fixedly connected to the exhaust pipe 5, and the end of the exhaust pipe 5 away from the first annular cooling tank 3 extends to the outside and is fixedly installed with a one-way valve 6.

[0024] During use, the two exhaust ports 15 ensure smooth gas discharge during injection molding and prevent bubble formation. The filter 9 filters the gas entering the air cooler 7, and the exhaust pipe 5 facilitates the discharge of exhaust gas.

[0025] A forming groove 10 is provided in the middle of the top of the lower mold base 2. The first annular cooling groove 3 and the second cooling groove 4 are provided in correspondence with the forming groove 10. Positioning holes 18 are provided on the four sides of the top of the lower mold base 2. Positioning pins 19 are fixedly provided at the four corners of the bottom of the upper mold base 12. The four positioning holes 18 are respectively engaged with the four positioning pins 19. Wear-resistant layers 20 are provided on the surface of the lower mold base 2 and the surface of the first annular cooling groove 3. Smooth coating 21 is provided on the surface of the two wear-resistant layers 20.

[0026] In use, the combination of the first annular cooling tank 3 and the second cooling tank 4 facilitates uniform cooling of the material. The combination of the four positioning holes 18 and the four positioning pins 19 facilitates precise docking between the upper mold base 12 and the lower mold base 2. The combination of the wear-resistant layer 20 and the smooth coating 21 improves the wear resistance and smoothness of the mold surface.

[0027] In use, this embodiment of the application demonstrates that by designing the mold gate eccentrically, smooth plastic flow can be ensured and uneven flow can be reduced, avoiding defects caused by uneven flow during injection molding. By providing a ramp 142 in the guide channel 14, the smooth flow of plastic material in the mold can be ensured, avoiding problems such as uneven cooling and bubbles caused by changes in flow rate. By providing multiple eccentric gates 13, multi-stage injection can be performed simultaneously, thereby improving injection molding efficiency. By energizing the cooler 7, cool air is generated and introduced into the first annular cooling tank 3 and the second cooling tank 4 through the air outlet 16, which facilitates uniform cooling of the material in the molding tank 10, thereby shortening the cooling time and improving work efficiency.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mold structure for use in small-nozzle, eccentric, thin-walled, and inclined injection molding processes, comprising a base (1), characterized in that: A lower mold base (2) is fixedly installed at the center of the top of the base (1). A second cooling groove (4) is opened inside the lower mold base (2). A first annular cooling groove (3) is opened at the top of the inner side of the second cooling groove (4). A cooler (7) is fixedly installed on one side of the lower mold base (2). An air outlet pipe (16) is fixedly connected to the air outlet end of the cooler (7). A flow valve (17) is fixedly installed at the end of the air outlet pipe (16) away from the cooler (7) into the interior of the first annular cooling groove (3). An electric hydraulic valve is fixedly installed at each of the four corners of the top of the base (1). A top mold base (12) is fixedly provided between the four electric hydraulic rods (11). The top of the top of the top mold base (12) is provided with a plurality of eccentric small sprue nozzles (13). The bottom of the inner side of the plurality of eccentric small sprue nozzles (13) is provided with a flow guide channel (14). The plurality of flow guide channels (14) include a first direct current section (141). The bottom end of the plurality of first direct current sections (141) is provided with a ramp section (142). The end of the plurality of ramp sections (142) away from the first direct current section (141) is provided with a second direct current section (143).

2. The mold structure according to claim 1, characterized in that: The upper mold base (12) has exhaust ports (15) on both sides, and the two exhaust ports (15) are respectively set to correspond to the lower mold base (2).

3. The mold structure according to claim 1, characterized in that: The air cooler (7) has an air inlet pipe (8) fixedly connected to its air inlet end, and a filter (9) is fixedly connected to the end of the air inlet pipe (8) away from the air cooler (7).

4. The mold structure according to claim 1, characterized in that: An exhaust pipe (5) is fixedly connected to the top of one side of the inner wall of the first annular cooling tank (3), and a one-way valve (6) is fixedly installed at the end of the exhaust pipe (5) away from the first annular cooling tank (3) to the outside.

5. The mold structure according to claim 1, characterized in that: A forming groove (10) is provided in the middle of the top of the lower mold base (2), and the first annular cooling groove (3) and the second cooling groove (4) are provided corresponding to the forming groove (10).

6. The mold structure according to claim 1, characterized in that: The lower mold base (2) has four positioning holes (18) on its top four sides, and the upper mold base (12) has four positioning posts (19) fixedly installed at its bottom four corners. The four positioning holes (18) are respectively engaged with the four positioning posts (19).

7. The mold structure according to claim 1, characterized in that: The surface of the lower mold base (2) and the surface of the first annular cooling groove (3) are both provided with wear-resistant layers (20), and the surfaces of the two wear-resistant layers (20) are both provided with smooth coatings (21).

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