An injection mold for easy demolding and its injection molding process

Abstract

This invention relates to the field of injection mold technology, and proposes an injection mold and injection process that facilitates demolding. The demolding-friendly injection mold includes an upper mold and a lower mold, with the bottom of the upper mold and the top of the lower mold adapted to each other. It also includes a cooling component, a molding groove, an injection pipeline, an venting component, a guide component, and an opening / closing component. Cooling components are installed on both the upper and lower molds. Molding grooves are formed on the bottom of the upper mold and are adapted to each other. The injection pipeline is located on the top of the upper mold and communicates with the molding groove. The venting component is installed on the upper mold, the guide component is installed on the bottom of the upper mold, and the opening / closing component is installed inside the cooling component. This technical solution solves the problem in the prior art where the vent of the injection mold may become blocked during the injection process, making it difficult for gas to escape smoothly and causing problems during demolding of the finished product.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to an injection mold that is easy to demold and its injection molding process. Background Technology

[0002] Injection molds are specialized processing equipment used for plastic molding. They consist of multiple parts, and the mass production of plastic products is achieved through the assembly of these parts. Injection molds are an indispensable part of modern industrial manufacturing, widely used in industries such as automobiles, electronics, home appliances, and building materials. They are a crucial step in the manufacturing of plastic products and are typically made of metal.

[0003] If there is a lot of dust or other contaminants in the production environment, these contaminants may accumulate in the vent of the injection mold. Alternatively, during the injection process, excessively fast injection speed, excessively high or low pressure, or excessively long holding time may cause air in the injection molded product to not be completely expelled, thus entering the vent and causing blockage.

[0004] When the vent is blocked, the gas in the injection molding process cannot be discharged smoothly. This will increase the pressure in the injection molding process, thereby prolonging the injection molding time and affecting the demolding time of the finished product. At the same time, it will also cause a large number of air bubbles inside the injection molded part, which will lead to a decrease in the quality of the injection molded part and affect production efficiency. Summary of the Invention

[0005] This invention proposes an injection mold and its injection process that facilitates demolding, solving the problem in the prior art where the vent of the injection mold may be blocked during the injection process, making it difficult for gas to escape smoothly and causing problems when demolding the finished product.

[0006] The technical solution of the present invention is as follows:

[0007] An injection mold for easy demolding includes an upper mold and a lower mold, wherein the bottom of the upper mold is adapted to the top of the lower mold, and further includes:

[0008] A cooling assembly is installed on both the upper mold and the lower mold to cool the finished product.

[0009] The upper mold and the lower mold are both provided with forming grooves, and the two forming grooves are adapted to each other.

[0010] The injection molding pipeline is located on the top of the upper mold and is connected to the molding groove;

[0011] An exhaust assembly, mounted on the upper mold, is used for venting air.

[0012] A guide assembly, installed at the bottom of the upper mold, is used for guiding;

[0013] An opening and closing assembly is installed inside the cooling assembly and is used to control the opening and closing of the exhaust assembly.

[0014] Based on the aforementioned solution, the cooling assembly includes:

[0015] The first cooling pipe is provided on both the upper mold and the lower mold. The first cooling pipe on the upper mold is located at the upper part of the forming groove, and the first cooling pipe on the lower mold is located at the lower part of the forming groove.

[0016] The second cooling pipe is provided on both the upper mold and the lower mold, and the forming groove is located inside the second cooling pipe.

[0017] A water inlet pipe is provided on the upper mold, and the water inlet pipe is connected to the first cooling pipe;

[0018] A connecting pipe is provided between each of the two first cooling pipes and the two second cooling pipes, and the connecting pipe is located away from the water inlet pipe;

[0019] The lower mold is provided with a drainage pipe, which is connected to the first cooling pipe.

[0020] A water-passing section is installed between the upper mold and the lower mold to connect the two second cooling pipes.

[0021] Based on the aforementioned solution, the water circulation section includes:

[0022] Water passage holes are provided on both the upper mold and the lower mold. The two water passage holes are respectively connected to the two second cooling pipes. The water passage holes are located between the water inlet pipe and the water outlet pipe.

[0023] An annular groove is provided on both of the water passage holes, and the two annular grooves are joined together.

[0024] The docking rings are fixedly installed on both of the annular grooves.

[0025] In addition to the aforementioned solutions, the following are also included:

[0026] A plug ring, wherein the plug ring is fixedly mounted on one of the mating rings;

[0027] The other mating ring has the insertion groove, which is adapted to the insertion ring;

[0028] The sealing ring has two sealing rings fixedly installed on one of the mating rings, and the insertion groove is provided between the two sealing rings. The sealing ring is sealed and abuts against the other mating ring.

[0029] Based on the aforementioned solution, the exhaust assembly includes:

[0030] The upper mold has multiple exhaust pipes at equal intervals, and the exhaust pipes are connected to the forming groove.

[0031] A retaining ring is fixedly installed in each of the exhaust pipes;

[0032] A closing part is installed in each of the exhaust pipes to control the closing and opening of the exhaust pipes.

[0033] Based on the aforementioned solution, the closure portion includes:

[0034] A sealing ring is fixedly installed at the bottom of each of the exhaust pipes;

[0035] A slider is slidably installed in each of the exhaust pipes;

[0036] Ventilation slots are provided on each of the sliders;

[0037] A connecting rod is fixedly installed at the bottom of each slider;

[0038] A closing plug is fixedly installed at the bottom of each of the connecting rods, and the closing plug is adapted to the sealing ring.

[0039] Based on the aforementioned solution, the guiding component includes:

[0040] Positioning blocks are fixedly installed at the four corners of the top of the lower mold;

[0041] The positioning groove is provided at each of the four corners of the bottom of the upper mold, and the positioning groove is adapted to the positioning block;

[0042] Guide blocks: Two guide blocks are symmetrically and fixedly installed at the bottom of the upper mold;

[0043] The lower mold has two guide grooves on its top, which are adapted to the guide block.

[0044] The working principle and beneficial effects of this invention are as follows:

[0045] 1. In this invention, during the cooling process, after the upper mold and the lower mold are properly aligned, the mating ring on the upper mold aligns with the mating ring on the lower mold. At the same time, the insertion ring enters the insertion groove and is stably engaged, serving as a positioning and guiding function. Under the action of the two sealing rings, the mating position between the two mating rings can be sealed, preventing leakage of cooling water when it passes through this position and improving the cooling effect.

[0046] 2. In this invention, excess air during injection molding can pass through the gap between the sealing ring and the closing plug, and be discharged from the exhaust pipe through the ventilation groove. When the plastic melt fills the molding groove, the plastic melt will contact the bottom of the closing plug, pushing the closing plug upward. At this point, the exhaust pipe can be closed when the closing plug contacts the sealing ring, thereby improving the stability of injection molding and improving the quality of the finished product.

[0047] 3. In this invention, cooling water is forced into the connecting hole, and the water entering the connecting hole will enter the sliding groove. Through the action of the water, the sliding frame is pushed to move. At this time, the return spring is compressed until the inclined surface of the sliding frame contacts the abutment block. Through the setting of the abutment block, the slider is pushed to move until the bottom of the slider contacts the fixed ring. At this time, the slider pushes the closing plug out of the sealing ring through the setting of the connecting rod, so that the closing plug and the sealing ring are separated, and the finished product can be taken out. This reduces the resistance during demolding, makes the demolding process smoother, and thus improves the demolding speed.

[0048] 4. In this invention, by cooperating with the cooling component and the opening and closing component, the opening and closing component can be quickly adjusted during the cooling process, thereby controlling the opening and closing of the exhaust pipe, making the exhaust more smooth and less prone to clogging. The exhaust pipe can also be quickly opened during demolding, making demolding smoother. Attached Figure Description

[0049] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0050] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0051] Figure 2 This is a three-dimensional structural schematic diagram showing a partial cross-section of the present invention;

[0052] Figure 3 This is a cross-sectional three-dimensional structural schematic diagram of the present invention;

[0053] Figure 4 This is a schematic diagram of the structure of the upper mold and the guide assembly in this invention;

[0054] Figure 5 For the present invention Figure 2 A magnified structural diagram of point A in the middle;

[0055] Figure 6 For the present invention Figure 3 A magnified structural diagram of point B in the middle section;

[0056] Figure 7 This is a cross-sectional view of the water passage section in this invention;

[0057] Figure 8 This is a schematic diagram of the structure of the lower mold and the guide assembly in this invention;

[0058] Figure 9 This is a cross-sectional structural diagram showing the cooperation of the exhaust assembly, guide assembly, and opening / closing assembly in this invention;

[0059] Figure 10 For the present invention Figure 9 A magnified structural diagram of point C in the middle;

[0060] Figure 11 For the present invention Figure 9 A magnified structural diagram of a portion of point D in the middle;

[0061] Figure 12 This is a schematic diagram of the structure of the closed part in this invention.

[0062] In the diagram: 1. Upper mold; 2. Lower mold; 3. Molding groove; 4. Injection piping; 5. First cooling pipe; 6. Second cooling pipe; 7. Water inlet pipe; 8. Connecting pipe; 9. Drainage pipe; 10. Water passage hole; 11. Annular groove; 12. Butt ring; 13. Insert ring; 14. Insert groove; 15. Sealing ring; 16. Exhaust pipe; 17. Fixing ring; 18. Sealing ring; 19. Slider; 20. Ventilation groove; 21. Connecting rod; 22. Closing plug; 23. Positioning block; 24. Positioning groove; 25. Guide block; 26. Guide groove; 27. Sliding groove; 28. Connecting hole; 29. ​​Sliding frame; 30. Abutment block; 31. Return spring; 32. Water outlet pipe; 33. Connector; 34. Side pipe; 35. Control valve. Detailed Implementation

[0063] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0064] Example 1

[0065] like Figures 1 to 12As shown, this embodiment proposes an injection mold for easy demolding, including an upper mold 1 and a lower mold 2. The bottom of the upper mold 1 is adapted to the top of the lower mold 2. It also includes a cooling assembly, a molding groove 3, an injection pipe 4, a venting assembly, a guide assembly, and an opening and closing assembly. Both the upper mold 1 and the lower mold 2 are equipped with cooling assemblies for cooling the finished product. The cooling assembly includes a first cooling pipe 5, a second cooling pipe 6, a water inlet pipe 7, a connecting pipe 8, a drain pipe 9, and a water passage. Both the upper mold 1 and the lower mold 2 are provided with the first cooling pipe 5. The first cooling pipe 5 on the upper mold 1 is located above the molding groove 3. The first cooling pipe 5 on the lower mold 2 is located at the lower part of the forming groove 3. The upper mold 1 and the lower mold 2 are both provided with second cooling pipes 6. The forming groove 3 is located inside the second cooling pipe 6. The upper mold 1 is provided with a water inlet pipe 7, which is connected to the first cooling pipe 5. The two first cooling pipes 5 and the two second cooling pipes 6 are connected by a connecting pipe 8. The connecting pipe 8 is located away from the water inlet pipe 7. The lower mold 2 is provided with a drain pipe 9, which is connected to the first cooling pipe 5. The water passage is installed between the upper mold 1 and the lower mold 2 to connect the two second cooling pipes 6.

[0066] Specifically, when using injection molds for injection molding, the upper mold 1 and the lower mold 2 are installed in the working position. At this time, the output end of the injection molding machine is connected to the injection pipe 4. The injection molding machine is started according to the predetermined injection molding process parameters, and the molten plastic melt is injected into the molding tank 3 and formed into an injection molded part. After the injection molding is completed, the cooling cycle is started. The cooling water source is connected to the water inlet pipe 7. The water source enters the first cooling pipe 5 of the upper mold 1 through the water inlet pipe 7, and then enters the second cooling pipe 6 of the upper mold 1 through the connecting pipe 8. Then, through the water passage, it passes through the second cooling pipe 6 and the first cooling pipe 5 of the lower mold 2 in sequence, and then flows out from the drain pipe 9 to start the next cycle. After waiting for the injection molded part to cool to the set temperature, the lid can be opened and the mold can be demolded. The demolding speed is improved by the opening and closing component.

[0067] The above, such as Figures 5 to 7As shown, the water passage section includes a water passage hole 10, an annular groove 11, and a connecting ring 12. Both the upper mold 1 and the lower mold 2 have water passage holes 10. The two water passage holes 10 are respectively connected to two second cooling pipes 6. The water passage holes 10 are located between the water inlet pipe 7 and the drain pipe 9. Both water passage holes 10 have annular grooves 11. The two annular grooves 11 are connected. A connecting ring 12 is fixedly installed on both annular grooves 11. The section also includes a plug ring 13, a plug groove 14, and a sealing ring 15. A plug ring 13 is fixedly installed on one of the connecting rings 12. A plug groove 14 is opened on the other connecting ring 12. The plug groove 14 is adapted to the plug ring 13. Two sealing rings 15 are fixedly installed on one of the connecting rings 12. A plug groove 14 is provided between the two sealing rings 15. The sealing ring 15 and the other connecting ring 12 are sealed and abutted.

[0068] Specifically, after injection molding, cooling is required. During the cooling process, when the cooling water in the second pipe of the upper mold 1 needs to enter the second pipe of the lower mold 2, after the upper mold 1 and the lower mold 2 are aligned, the positions of the two annular grooves 11 on the upper mold 1 and the lower mold 2 correspond. At this time, the mating ring 12 on the upper mold 1 aligns with the mating ring 12 on the lower mold 2. Simultaneously, the insertion ring 13 enters the insertion groove 14 and is stably engaged, playing a positioning and guiding role. Under the action of the two sealing rings 15, the mating position between the two mating rings 12 can be sealed, preventing leakage of cooling water when passing through this position.

[0069] like Figures 9 to 12 As shown, the bottom of the upper mold 1 and the top of the lower mold 2 are both provided with molding grooves 3. The two molding grooves 3 are compatible. The injection pipe 4 is opened on the top of the upper mold 1 and is connected to the molding groove 3. The venting assembly is installed on the upper mold 1 for venting. The venting assembly includes an venting pipe 16, a fixing ring 17 and a closing part. Multiple venting pipes 16 are opened at equal intervals on the upper mold 1. The venting pipes 16 are connected to the molding groove 3. A fixing ring 17 is fixedly installed in each venting pipe 16. A closing part is installed in each venting pipe 16 for controlling the opening and closing of the venting pipe 16.

[0070] Specifically, during injection molding, molten plastic is injected into the injection pipe 4 and then into the molding groove 3 between the upper mold 1 and the lower mold 2. As the injection continues, the amount of molten plastic in the molding groove 3 increases. At this time, the air will be discharged from the molding groove 3 through the vent pipe 16. When the bottom of the closing part comes into contact with the molten plastic, it will be pushed up until the closing part moves to the closed position, thus sealing the vent pipe 16. This reduces the possibility of the vent pipe 16 being blocked and reduces the impact of poor venting during the injection molding process on the quality of the finished product.

[0071] The above, such as Figure 12As shown, the closing part includes a sealing ring 18, a slider 19, a ventilation groove 20, a connecting rod 21, and a closing plug 22. A sealing ring 18 is fixedly installed at the bottom of each exhaust pipe 16, a slider 19 is slidably installed in each exhaust pipe 16, a ventilation groove 20 is provided on each slider 19, a connecting rod 21 is fixedly installed at the bottom of each slider 19, and a closing plug 22 is fixedly installed at the bottom of each connecting rod 21. The closing plug 22 is adapted to the sealing ring 18.

[0072] Specifically, under normal conditions, the bottom of slider 19 abuts against the top of fixed ring 17 under the action of gravity. At this time, the closing plug 22 disengages from sealing ring 18. Excess air during injection molding can pass through the gap between sealing ring 18 and closing plug 22, and be discharged from exhaust pipe 16 through ventilation groove 20. When the plastic melt fills molding groove 3, the plastic melt will contact the bottom of closing plug 22, pushing closing plug 22 upward. At this point, the exhaust pipe 16 is closed when closing plug 22 contacts sealing ring 18.

[0073] The guide assembly is installed at the bottom of the upper mold 1 for guiding. The guide assembly includes a positioning block 23, a positioning groove 24, a guide block 25 and a guide groove 26. Positioning blocks 23 are fixedly installed at the four corners of the top of the lower mold 2. Positioning grooves 24 are opened at the four corners of the bottom of the upper mold 1. The positioning grooves 24 are adapted to the positioning blocks 23. Two guide blocks 25 are symmetrically and fixedly installed at the bottom of the upper mold 1. Two guide grooves 26 are opened at the top of the lower mold 2. The guide grooves 26 are adapted to the guide blocks 25.

[0074] Specifically, the cooperation between the positioning block 23 and the positioning groove 24, and the cooperation between the guide block 25 and the guide groove 26, can improve the accuracy of the docking between the upper mold 1 and the lower mold 2, and improve the efficiency of the docking between the upper mold 1 and the lower mold 2.

[0075] like Figure 10 , Figure 11 As shown, the opening and closing assembly is installed inside the cooling assembly and is used to control the opening and closing of the exhaust assembly. The opening and closing assembly includes a sliding groove 27, a connecting hole 28, a sliding bracket 29, a stop block 30, a return spring 31, and a control unit. Each exhaust pipe 16 is provided with a sliding groove 27, and each sliding groove 27 is connected to the second cooling pipe 6 by a connecting hole 28. A sliding bracket 29 is slidably and sealed inside each sliding groove 27. The sliding bracket 29 is located on the top of the slider 19. A stop block 30 is fixedly installed on the top of each slider 19. The stop block 30 is adapted to the sliding bracket 29. A return spring 31 is fixedly installed between each sliding bracket 29 and the sliding groove 27. The control unit is installed on the drain pipe 9 and is used to control the position of the sliding bracket 29.

[0076] Specifically, after injection molding, when the finished product needs to be removed, the control unit allows cooling water to be forced into the connecting hole 28. The water entering the connecting hole 28 will enter the sliding groove 27. The water will push the sliding frame 29 to move. At this time, the return spring 31 is compressed until the inclined surface of the sliding frame 29 contacts the abutment block 30. The abutment block 30 will push the slider 19 to move until the bottom of the slider 19 contacts the fixing ring 17. At this time, the slider 19 will push the closing plug 22 out of the sealing ring 18 through the connecting rod 21, so that the closing plug 22 and the sealing ring 18 are separated, and the finished product can be removed. Then, the control unit is restored to its original position, and the sliding frame 29 is moved back to its original position under the action of the return spring 31.

[0077] The control unit mentioned above includes an outlet pipe 32, a connector 33, a side pipe 34, and a control valve 35. The outlet pipe 32 is connected to the drainage pipe 9. The inlet pipe 7 and the outlet pipe 32 are both connected to the end of the outlet pipe 32 by a connector 33. A side pipe 34 is provided on the outlet pipe 32. Both ends of the side pipe 34 are connected to the outlet pipe 32. The control valve 35 is fixedly installed on the side pipe 34. The outlet pipe 32 is also equipped with a control valve 35, which is located at the lower part of the side pipe 34.

[0078] Specifically, during the cooling process, the control valve 35 on the side pipe 34 is closed, and the control valve 35 on the outlet pipe 32 is opened. At this time, the water flows through the outlet pipe 32 and is discharged through the connector 33. When the finished product needs to be removed, the control valve 35 on the outlet pipe 32 is closed first. At this time, the water enters the outlet pipe 32 and flows through the side pipe 34 before flowing out from the connector 33. The control valve 35 on the side pipe 34 is a pressure valve. When the water flows to the inlet of the control valve 35 on the side pipe 34, as the water pressure increases, when the water pressure increases to a certain value, the control valve 35 can be opened, the water enters the side pipe 34, and flows out from the connector 33.

[0079] In summary, when using injection molds for injection molding, the upper mold 1 and the lower mold 2 are installed in the working position. Through the cooperation of the positioning block 23 and the positioning groove 24, and the cooperation of the guide block 25 and the guide groove 26, the accuracy of the docking between the upper mold 1 and the lower mold 2 can be improved, and the docking efficiency between the upper mold 1 and the lower mold 2 can be improved. At this time, the output end of the injection molding machine is connected to the injection pipeline 4, and the injection molding machine is started according to the predetermined injection molding process parameters. The molten plastic melt is injected into the molding tank 3 and formed into an injection molded part.

[0080] During injection molding, molten plastic is injected into the injection pipe 4 and then into the molding groove 3 between the upper mold 1 and the lower mold 2. As injection continues, the amount of molten plastic in the molding groove 3 increases. At this time, the air will be discharged from the molding groove 3 through the vent pipe 16. Under normal conditions, the bottom of the slider 19 is in contact with the top of the fixing ring 17. At this time, the closing plug 22 is disengaged from the sealing ring 18. Excess air during injection can pass through the gap between the sealing ring 18 and the closing plug 22 and be discharged from the vent pipe 16 through the ventilation groove 20. When the molten plastic fills the molding groove 3, the molten plastic will contact the bottom of the closing plug 22 and push the closing plug 22 upward until the closing plug 22 contacts the sealing ring 18, thus sealing the vent pipe 16, reducing the possibility of the vent pipe 16 being blocked, and reducing the impact of poor venting during injection on the quality of the finished product.

[0081] After injection molding is completed, the cooling cycle is started. The cooling water source is connected to the water inlet pipe 7. The water source enters the first cooling pipe 5 of the upper mold 1 through the water inlet pipe 7, and then enters the second cooling pipe 6 of the upper mold 1 through the connecting pipe 8. When the cooling water in the second pipe of the upper mold 1 needs to enter the second pipe of the lower mold 2, after the upper mold 1 and the lower mold 2 are aligned, the positions of the two annular grooves 11 on the upper mold 1 and the lower mold 2 correspond. At this time, the mating ring 12 on the upper mold 1 mates with the mating ring 12 on the lower mold 2. At the same time, the insertion ring 13 enters the insertion groove 14 and is stably engaged, playing a role in positioning and guiding. Under the action of the two sealing rings 15, the mating position between the two mating rings 12 can be sealed, preventing leakage of cooling water when passing through this position. At this time, the cooling water passes through the second cooling pipe 6 and the first cooling pipe 5 of the lower mold 2 in sequence, and then flows out from the drain pipe 9 to start the next cycle. After waiting for the injection molded part to cool to the set temperature, the lid can be opened and the mold can be demolded.

[0082] During demolding, first close the control valve 35 on the water outlet pipe 32. Water entering the water outlet pipe 32 will then flow through the side pipe 34 before exiting through the connector 33. The control valve 35 on the side pipe 34 is a pressure valve. When water flows to the inlet of the control valve 35 on the side pipe 34, as the water pressure increases, when the water pressure reaches a certain value, it will open the control valve 35, allowing water to enter the side pipe 34 and exit through the connector 33. Due to the increased water pressure, cooling water is forced into the connecting hole 28. The water entering the connecting hole 28 will enter the sliding groove 27, pushing... The sliding frame 29 moves, and the return spring 31 is compressed until the inclined surface of the sliding frame 29 contacts the abutment block 30. The abutment block 30 pushes the slider 19 to move until the bottom of the slider 19 contacts the fixing ring 17. At this time, the slider 19 pushes the closing plug 22 out of the sealing ring 18 through the connecting rod 21, so that the closing plug 22 is separated from the sealing ring 18, and the finished product can be taken out. Then the position of the sliding frame 29 is restored, and the sliding frame 29 is moved back to its original position under the action of the return spring 31, which improves the demolding speed.

[0083] Example 2

[0084] Based on Embodiment 1, this embodiment also discloses an injection molding process that facilitates demolding, using the aforementioned injection mold that facilitates demolding, and includes the following steps:

[0085] The first step is installation. By cooperating with the positioning block 23 and the positioning groove 24, and with the guide block 25 and the guide groove 26, the upper mold 1 and the lower mold 2 are installed in the working position.

[0086] The second step is injection molding. The output end of the injection molding machine is connected to the injection pipeline 4. The injection molding machine is started according to the predetermined injection molding process parameters, and the molten plastic is injected into the molding tank 3.

[0087] The third step is to vent the air. As the amount of molten plastic in the molding tank 3 increases, air can pass through the gap between the sealing ring 18 and the closing plug 22 and be discharged from the exhaust pipe 16 through the ventilation slot 20.

[0088] The fourth step is to close the plug. The plastic melt contacts the bottom of the plug 22 and pushes the plug 22 upward until it contacts the sealing ring 18, thus sealing the vent pipe 16. This reduces the possibility of the vent pipe 16 being blocked and also reduces the impact of poor venting during injection molding on the quality of the finished product.

[0089] The fifth step is cooling. The cooling water source is connected to the water inlet pipe 7. The water source enters the first cooling pipe 5 of the upper mold 1 through the water inlet pipe 7, and then enters the second cooling pipe 6 of the upper mold 1 through the connecting pipe 8.

[0090] Step 6: Drainage. Cooling water in the second pipe of the upper mold 1 enters the second pipe of the lower mold 2.

[0091] Step 7: docking. The positions of the two annular grooves 11 on the upper mold 1 and the lower mold 2 correspond. At this time, the docking ring 12 on the upper mold 1 docks with the docking ring 12 on the lower mold 2. At the same time, the insertion ring 13 enters the insertion groove 14 and is stably engaged, playing a positioning and guiding role. Under the action of the two sealing rings 15, the docking position between the two docking rings 12 can be sealed, preventing the cooling water from leaking when passing through this position.

[0092] Step 8: Water is introduced. The cooling water passes through the second cooling pipe 6 and the first cooling pipe 5 of the lower mold 2 in sequence, and then flows out through the drain pipe 9 to start the next cycle.

[0093] Step 9: Pressure control. Close the control valve 35 on the outlet pipe 32. At this time, after the water enters the outlet pipe 32, it will flow through the side pipe 34 before flowing out from the connector 33. The control valve 35 on the side pipe 34 is a pressure valve. When the water flows to the inlet of the control valve 35 on the side pipe 34, as the water pressure increases, when the water pressure increases to a certain value, it can open the control valve 35, enter the side pipe 34, and flow out from the connector 33.

[0094] Step 10: Control. Due to the increase in water pressure, cooling water is forced into the connecting hole 28, and the water entering the connecting hole 28 will enter the sliding groove 27.

[0095] Step 11: Positioning. Using the water, the sliding frame 29 is moved. At this time, the return spring 31 is compressed until the inclined surface of the sliding frame 29 contacts the abutment block 30. Through the setting of the abutment block 30, the slider 19 is moved until the bottom of the slider 19 contacts the fixing ring 17. At this time, the slider 19, through the setting of the connecting rod 21, pushes the closing plug 22 out of the sealing ring 18, so that the closing plug 22 is separated from the sealing ring 18, and the finished product can be taken out.

[0096] Step 12: Reset. Under the action of the reset spring 31, the sliding frame 29 is moved back to its original position, which improves the demolding speed.

[0097] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. 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. An injection mold for easy demolding, comprising an upper mold (1) and a lower mold (2), wherein the bottom of the upper mold (1) is adapted to the top of the lower mold (2), characterized in that, Also includes: Cooling components are installed on both the upper mold (1) and the lower mold (2) for cooling the finished product; The molding groove (3) is provided at the bottom of the upper mold (1) and at the top of the lower mold (2), and the two molding grooves (3) are adapted to each other. Injection pipe (4), the injection pipe (4) is opened on the top of the upper mold (1), and the injection pipe (4) is connected to the molding groove (3); An exhaust assembly is mounted on the upper mold (1) for venting; A guide assembly is installed at the bottom of the upper mold (1) for guiding purposes; An opening and closing assembly is installed inside the cooling assembly and is used to control the opening and closing of the exhaust assembly; the cooling assembly includes a second cooling pipe (6). The opening and closing component includes: Sliding groove (27) is provided on each exhaust pipe (16); A connecting hole (28) is provided between each of the sliding grooves (27) and the second cooling pipe (6). The sliding frame (29) is slidably and sealed inside each of the sliding grooves (27), and the sliding frame (29) is located on top of the slider (19); Abutting block (30) is fixedly installed on the top of each slider (19), and the abutting block (30) is adapted to the sliding frame (29); A return spring (31) is fixedly installed between each of the sliding brackets (29) and the sliding groove (27). A control unit is installed on the drainage pipe (9) and is used to control the position of the sliding frame (29); After injection molding, when the finished product needs to be removed, the control unit is set to allow cooling water to be squeezed into the connecting hole (28). The water entering the connecting hole (28) will enter the sliding groove (27). Through the action of the water, the sliding frame (29) is pushed to move. At this time, the return spring (31) is compressed until the inclined surface of the sliding frame (29) contacts the abutment block (30). Through the setting of the abutment block (30), the slider (19) is pushed to move until the bottom of the slider (19) contacts the fixing ring (17). At this time, the slider (19) pushes the closing plug (22) out of the sealing ring (18) through the setting of the connecting rod (21), so that the closing plug (22) and the sealing ring (18) are separated, and the finished product can be removed. Then the position of the control unit is restored, and the sliding frame (29) is moved back to its original position under the action of the return spring (31).

2. The injection mold for easy demolding according to claim 1, characterized in that, The cooling assembly includes: The first cooling pipe (5) is provided on both the upper mold (1) and the lower mold (2). The first cooling pipe (5) on the upper mold (1) is located at the upper part of the forming groove (3), and the first cooling pipe (5) on the lower mold (2) is located at the lower part of the forming groove (3). The upper mold (1) and the lower mold (2) are both provided with the second cooling pipe (6), and the forming groove (3) is located inside the second cooling pipe (6).

3. The injection mold for easy demolding according to claim 2, characterized in that, The cooling assembly includes: Water inlet pipe (7), the upper mold (1) is provided with the water inlet pipe (7), the water inlet pipe (7) is connected to the first cooling pipe (5); The connecting pipe (8) is connected between the two first cooling pipes (5) and the two second cooling pipes (6), and the location of the connecting pipe (8) is far away from the water inlet pipe (7).

4. The injection mold for easy demolding according to claim 3, characterized in that, The cooling assembly includes: Drainage pipe (9), the lower mold (2) is provided with the drainage pipe (9), the drainage pipe (9) is connected to the first cooling pipe (5); A water passage is installed between the upper mold (1) and the lower mold (2) to connect the two second cooling pipes (6).

5. The injection mold for easy demolding according to claim 4, characterized in that, The water passage section includes: Water passage (10) is provided on both the upper mold (1) and the lower mold (2). The two water passages (10) are respectively connected to the two second cooling pipes (6). The water passages (10) are located between the water inlet pipe (7) and the drain pipe (9). An annular groove (11) is provided on both of the two water passage holes (10), and the two annular grooves (11) are connected together; The docking ring (12) is fixedly installed on both of the annular grooves (11).

6. The injection mold for easy demolding according to claim 5, characterized in that, Also includes: A plug ring (13), wherein the plug ring (13) is fixedly mounted on one of the mating rings (12); The insertion slot (14) is provided on another mating ring (12), and the insertion slot (14) is adapted to the insertion ring (13); A sealing ring (15) is provided, on which two sealing rings (15) are fixedly installed on one of the mating rings (12), and the insertion groove (14) is provided between the two sealing rings (15). The sealing ring (15) is sealed and abuts against the other mating ring (12).

7. The injection mold for easy demolding according to claim 6, characterized in that, The exhaust assembly includes: Exhaust pipe (16), a plurality of exhaust pipes (16) are provided at equal intervals on the upper mold (1), and the exhaust pipes (16) are connected to the forming groove (3); A retaining ring (17) is fixedly installed in each of the exhaust pipes (16); A closing part is installed in each of the exhaust pipes (16) for controlling the closing and opening of the exhaust pipes (16).

8. The injection mold for easy demolding according to claim 7, characterized in that, The closure portion includes: A sealing ring (18) is fixedly installed at the bottom of each of the exhaust pipes (16). Slider (19), each of the exhaust pipes (16) is slidably mounted with the slider (19). Ventilation slot (20), each of the sliders (19) is provided with the ventilation slot (20); Link (21), each of the sliders (19) is fixedly mounted with the link (21) at its bottom; A closing plug (22) is fixedly installed at the bottom of each of the connecting rods (21), and the closing plug (22) is adapted to the sealing ring (18).

9. The injection mold for easy demolding according to claim 8, characterized in that, The guiding component includes: Positioning blocks (23) are fixedly installed at the four corners of the top of the lower mold (2). Positioning groove (24): The positioning groove (24) is provided at the four corners of the bottom of the upper mold (1), and the positioning groove (24) is adapted to the positioning block (23).

10. An injection mold for easy demolding according to claim 9, characterized in that, The guiding component includes: Guide blocks (25): Two guide blocks (25) are symmetrically and fixedly installed at the bottom of the upper mold (1); Guide groove (26): Two guide grooves (26) are provided on the top of the lower mold (2), and the guide grooves (26) are adapted to the guide block (25).

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