A mold frame having a cooling structure

Abstract

The application relates to the technical field of injection molds, and a mold frame with a cooling structure comprises an upper mold base, a lower mold base and water pumps, one side of the upper mold base close to the lower mold base and one side of the lower mold base close to the upper mold base are each provided with a mounting groove for embedding a mold core, the upper mold base and the lower mold base are each provided with a cooling cavity which is arranged around the mounting groove, the cavity wall of the cooling cavity is respectively provided with an inlet channel and an outlet channel, the number of the water pumps is the same as the sum of the number of the upper mold base and the lower mold base and is one-to-one corresponding, the water pumps are connected to the upper mold base or the lower mold base, and the water pumps are connected in communication with the inlet channels through pipelines. Liquid is sent into the cooling cavities through the inlet channels by the water pumps, the products in the forming cavities between the two mold cores are cooled, the cooling efficiency of the products in the forming cavities is improved, and the production efficiency of the mold frame is improved.

Description

Technical Field

[0001] This application relates to the technical field of injection molds, and in particular to a mold base with a cooling structure. Background Technology

[0002] Injection molds are tools used to create complete structures and precise dimensions for plastic products. Injection molding is a processing method used for the mass production of certain complex-shaped parts. Specifically, it refers to injecting molten plastic into a mold cavity under high pressure using an injection molding machine, and then cooling and solidifying it to obtain the molded product.

[0003] However, with current injection molds, the time required for the product to cool naturally after injection is relatively long, which cannot achieve the ideal effect of rapid production and affects production efficiency. Utility Model Content

[0004] In order to accelerate the cooling efficiency of products and thus improve production efficiency, this application provides a mold frame with a cooling structure.

[0005] The mold frame with a cooling structure provided in this application adopts the following technical solution: A mold frame with a cooling structure includes an upper mold base, a lower mold base, and a water pump. The upper mold base has mounting grooves on the side near the lower mold base, and the lower mold base has mounting grooves on the side near the upper mold base. These mounting grooves are used for inserting mold cores. Both the upper and lower mold bases have cooling chambers surrounding the mounting grooves. The walls of each cooling chamber have inlet and outlet channels. The number of water pumps is the same as the sum of the number of upper and lower mold bases and corresponds one-to-one. Each water pump is connected to either the upper or lower mold base and is connected to the inlet channel via a pipe.

[0006] By adopting the above technical solution, liquid is pumped into the cooling chamber through the liquid inlet channel by a water pump, thereby cooling the product in the molding cavity between the two mold cores, improving the cooling efficiency of the product in the molding cavity, and improving the production efficiency of the mold frame.

[0007] Preferably, it also includes a controller and a contact switch. The upper mold base is provided with a groove on the side near the lower mold base or the lower mold base is near the upper mold base. The contact switch is embedded in the groove and is used to abut against the upper mold base or the lower mold base. The controller is connected to the upper mold base and is used to control the operation of the water pump. When the contact switch is closed, the water pump starts.

[0008] By adopting the above technical solution, when the upper mold base and the lower mold base are closed for product injection molding, the contact switch closes and the controller controls the water pump to start sending liquid into the cooling chamber, reducing the possibility of energy waste caused by the water pump starting when the upper mold base and the lower mold base are not closed, and improving the automation level of the mold frame.

[0009] Preferably, it also includes a heating wire, the upper mold base or the lower mold base is provided with an annular cavity, the heating wire is embedded in the sliding groove, and the controller is used to control the operation of the heating wire. When raw material is introduced into the forming cavity between the two mold cores, the heating wire is activated.

[0010] By adopting the above technical solution, when the raw material is introduced into the molding cavity between the two mold cores, the heating wire works to heat the liquid in the cooling cavity, so that the raw material entering the molding cavity remains in a molten state, which helps the raw material flow to all corners of the molding cavity, improves the product yield, and improves the production efficiency of the mold frame.

[0011] Preferably, the system also includes hot water tanks, the number of which is the same as the number of water pumps and corresponds one-to-one. The hot water tanks are connected to the upper mold base or the lower mold base. Each hot water tank has a hot water chamber, and a second liquid inlet is provided on the upper wall of the hot water chamber. The second liquid inlet is connected to the liquid outlet channel through a pipe.

[0012] By adopting the above technical solution, a hot water tank is set up to store the high-temperature liquid pulled out from the cooling chamber. When it is necessary to keep the raw material in the molding chamber warm, the high-temperature liquid in the hot water tank can be sent into the cooling chamber, reducing the time required for the heating wire to heat the liquid in the cooling chamber to the specified temperature, reducing energy waste, and improving the environmental performance of the mold frame.

[0013] Preferably, there are two liquid outlet channels, which are symmetrically distributed along the mold closing direction perpendicular to the upper mold base and the lower mold base. The number of second liquid inlets is the same as the number of liquid outlet channels and they correspond one-to-one.

[0014] By adopting the above technical solution, two liquid outlet channels are provided, which facilitates the rapid discharge of liquid in the cooling chamber, reduces the possibility of failure of the cooling structure of the mold frame when any liquid outlet channel is blocked, and improves the reliability of the mold frame.

[0015] Preferably, it also includes a cold water tank and an electromagnetic three-way valve. The cold water tank is provided with a cold water chamber. The electromagnetic three-way valve is connected to the upper mold base or the lower mold base. The electromagnetic three-way valve is connected to the hot water chamber, the cold water chamber and the water pump through a pipe. When the heating wire is working, the electromagnetic three-way valve connects the hot water chamber and the water pump.

[0016] By adopting the above technical solution, the initial temperature of the liquid pumped into the cooling chamber is switched by an electromagnetic three-way valve to meet the different needs of cooling and heat preservation, thereby improving the reliability of the mold frame.

[0017] Preferably, the system further includes a liquid replenishment assembly, the number of which is the same as the number of hot water tanks and corresponds one-to-one. The liquid replenishment assembly includes a liquid replenishment pump, a float plate, a first sensor, and a second sensor. The liquid replenishment pump is connected to the cold water tank and is used to transport liquid from the cold water chamber to the hot water chamber. The controller is used to control the operation of the liquid replenishment pump. The float plate is slidably embedded in the hot water chamber. The first sensor and the second sensor are embedded in the hot water chamber and are spaced apart along the sliding direction of the float plate. The first sensor and the second sensor are used to detect the position of the float plate and send a signal to the controller. When the first sensor detects the float plate, the liquid replenishment pump operates.

[0018] By adopting the above technical solution, when the liquid temperature is too high, the liquid is prone to vaporization, causing the gaseous liquid to leak from the gaps in the mold frame. This reduces the liquid volume in the cooling chamber and hot water tank branch, making it insufficient to meet the liquid volume required for heat preservation. The position of the float is detected by the first and second sensors to determine the height of the liquid level in the hot water chamber. A signal is sent to the controller, which drives the replenishment pump to raise the liquid level in the hot water chamber to the specified height, thereby stabilizing the heat of the liquid in the cooling chamber and hot water tank branch and improving the reliability of the mold frame.

[0019] Preferably, the hot water chamber is provided with an overflow port, which is connected to the cold water chamber through a pipe.

[0020] By adopting the above technical solution, when there is too much liquid in the hot water chamber, the liquid is discharged through the overflow port, reducing the energy required by the external driving source to drive the upper mold base, lower mold base and hot water chamber to move.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. A water pump delivers liquid into the cooling chamber through the inlet channel, thereby cooling the product in the molding cavity between the two mold cores, improving the cooling efficiency of the product in the molding cavity, and increasing the production efficiency of the mold frame; 2. When raw material is introduced into the molding cavity between the two mold cores, the heating wire works to heat the liquid in the cooling cavity, so that the raw material entering the molding cavity remains in a molten state, which helps the raw material flow to all corners of the molding cavity, improves the product yield, and improves the production efficiency of the mold frame. 3. The initial temperature of the liquid pumped into the cooling chamber is switched by an electromagnetic three-way valve to meet the different needs of cooling and heat preservation, thereby improving the reliability of the mold frame. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a mold frame with a cooling structure.

[0023] Figure 2 This is a cross-sectional view of a mold frame with a cooling structure.

[0024] Figure 3 This is a partial sectional view of a mold frame with a cooling structure, mainly showing the contact switch.

[0025] Figure 4 This is a cross-sectional view of a mold frame with a cooling structure.

[0026] Figure 5 This is a partial sectional view of the mold frame with a cooling structure, mainly showing the liquid replenishment components.

[0027] Figure 6 It is a partial sectional view of the mold frame with a cooling structure, mainly showing the third liquid inlet.

[0028] Explanation of reference numerals in the attached figures: 1. Mold base body; 11. Upper mold base; 12. Lower mold base; 13. Mounting groove; 14. Cooling cavity; 15. Liquid inlet channel; 16. Liquid outlet channel; 17. Groove; 18. Annular cavity; 2. Cooling mechanism; 21. Cooling assembly; 211. Water pump; 212. Hot water tank; 2121. Hot water chamber; 2122. Second outlet; 2123. Second inlet; 2124. Overflow port; 2125. Third inlet; 2126. Guide groove; 2127. First groove; 2128. Second groove; 213. Solenoid three-way valve; 22. Cold water tank; 221. Cold water chamber; 222. First outlet; 223. Third outlet; 224. Return port; 23. Liquid replenishment assembly; 231. Liquid replenishment pump; 232. Float; 2321. Guide block; 233. First sensor; 234. Second sensor; 3. Control mechanism; 31. Contact switch; 4. Insulation mechanism; 41. Heating wire. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] Reference Figure 1 This application discloses a mold frame with a cooling structure, including a mold frame body 1. The mold frame body 1 includes an upper mold base 11 and a lower mold base 12. The upper mold base 11 and the lower mold base 12 are closed along the thickness direction of the lower mold base 12. The closing direction of the upper mold base 11 and the lower mold base 12 is horizontal.

[0031] Reference Figure 2The upper mold base 11 has mounting grooves 13 on one side near the lower mold base 12, and the lower mold base 12 has mounting grooves 13 on one side near the upper mold base 11. The mounting grooves 13 are used to place the mold cores. The mold cores in the two mounting grooves 13 cooperate with each other to form a molding cavity for product production. Both the upper mold base 11 and the lower mold base 12 have cooling chambers 14. The cooling chambers 14 are arranged around the mounting grooves 13. A liquid inlet channel 15 is provided on the side wall of the cooling chamber 14 near the lower end of the lower mold base 12. The liquid inlet channel 15 is located on the side of the cooling chamber 14 away from the bottom of the mounting groove 13 and is connected to the outside.

[0032] Reference Figure 1 and Figure 2 A mold frame with a cooling structure also includes a control mechanism 3 and a cooling mechanism 2. The cooling mechanism 2 includes a cooling component 21. The number of cooling components 21 is the same as the number of cooling chambers 14 and corresponds one-to-one. The cooling component 21 includes a water pump 211. The water pump 211 is fixedly connected to the surface of the upper mold base 11 or the lower mold base 12 near the liquid inlet channel 15. The outlet of the water pump 211 is connected to the liquid inlet channel 15 through a pipe.

[0033] Reference Figure 3 The control mechanism 3 includes a controller and contact switches 31. The controller is connected to the upper mold base 11 and is used to control the operation of the water pump 211. Both the upper mold base 11 and the lower mold base 12 are provided with grooves 17. The number of contact switches 31 is the same as the number of grooves 17 and corresponds one-to-one. The contact switches 31 are used to abut against the upper mold base 11 or the lower mold base 12. In this embodiment, when the contact switch 31 is closed, the controller controls the water pump 211 to start.

[0034] Reference Figure 2 A mold frame with a cooling structure also includes a heat preservation mechanism 4. The heat preservation mechanism 4 includes heating wires 41. Both the upper mold base 11 and the lower mold base 12 are provided with annular cavities 18, which are located outside the cooling cavity 14 and surround the cooling cavity 14. Several heating wires 41 are provided, divided into two groups, with each group of heating wires 41 embedded in one of the two annular cavities 18. The heating wires 41 in the same group are spaced apart along the mold closing direction of the upper mold base 11 and the lower mold base 12. A controller is used to control the operation of the heating wires 41. In this embodiment, ten heating wires 41 are provided, with five heating wires 41 in the same group evenly distributed along the mold closing direction of the upper mold base 11 and the lower mold base 12. When raw material is introduced into the molding cavity between the two mold cores, the controller controls the heating wires 41 to heat; when the raw material is stopped being introduced, the controller controls the heating wires 41 to stop working.

[0035] Reference Figure 1 and Figure 4The cooling mechanism 2 also includes a cold water tank 22, which is located below the mold frame body 1. The cold water tank 22 is provided with a cold water chamber 221. The cooling chamber 14 is provided with a first liquid outlet 222 on one side of the cavity wall perpendicular to the mold closing direction of the upper mold base 11 and the lower mold base 12. The first liquid outlet 222 is tangent to the lower cavity wall of the cold water chamber 221. The number of first liquid outlets 222 is the same as the number of water pumps 211 and they correspond one-to-one.

[0036] Reference Figure 2 and Figure 4 The cooling assembly 21 also includes a hot water tank 212 and a solenoid three-way valve 213. The hot water tank 212 is fixedly connected to the surface of the upper mold base 11 or the lower mold base 12 near the cold water tank 22, and is located on the side of the upper mold base 11 or the lower mold base 12 away from the groove opening of the mounting slot 13. The hot water tank 212 has a hot water chamber 2121, and a second outlet 2122 is provided on the side wall of the hot water chamber 2121 near the water pump 211. The second outlet 2122 is tangent to the lower wall of the hot water chamber 2121. The solenoid three-way valve 213 is fixedly connected to the surface of the upper mold base 11 or the lower mold base 12 near the water pump 211, and is located on the side of the water pump 211 near the liquid inlet channel 15. The controller is used to control the operation of the solenoid three-way valve 213. The solenoid three-way valve 213 is connected to the first outlet 222, the second outlet 2122 and the water inlet of the water pump 211 through pipes. In this embodiment, when raw material is introduced into the molding cavity between the two mold cores, the controller controls the electromagnetic three-way valve 213 to connect the second liquid outlet 2122 and the water pump 211. When the raw material is stopped being introduced, the controller controls the electromagnetic three-way valve 213 to connect the first liquid outlet 222 and the water pump 211.

[0037] Reference Figure 4 and Figure 5 A liquid outlet channel 16 is provided on the side of the cooling chamber 14 away from the liquid inlet channel 15. The liquid outlet channel 16 is located on the side of the cooling chamber 14 away from the liquid inlet channel 15 along the mold closing direction of the upper mold base 11 and the lower mold base 12. There are two liquid outlet channels 16, which are symmetrically distributed along the direction perpendicular to the mold closing direction of the upper mold base 11 and the lower mold base 12. A second liquid inlet 2123 is provided on the upper wall of the hot water chamber 2121. The number of second liquid inlets 2123 is the same as the number of liquid outlet channels 16 and they correspond one-to-one. The second liquid inlets 2123 are connected to the liquid outlet channels 16 through pipes. The hot water chamber 2121 has overflow ports 2124 on both sides of the chamber wall along the length of the hot water tank 212, and the cold water chamber 221 has return ports 224 on the chamber wall. The number of return ports 224 is the same as the number of overflow ports 2124 and they correspond one-to-one. The return ports 224 are tangent to the upper chamber wall of the cold water chamber 221 and are connected to the overflow ports 2124 through pipes.

[0038] Reference Figure 1 and Figure 5The cooling mechanism 2 also includes a liquid replenishment assembly 23. The number of liquid replenishment assemblies 23 is the same as the number of hot water tanks 212 and they correspond one-to-one. The liquid replenishment assembly 23 includes a liquid replenishment pump 231, which is fixedly connected to the side surface of the cold water tank 22 near the hot water tank 212. The controller is used to control the operation of the liquid replenishment pump 231. A third liquid outlet 223 is provided on the side wall of the cold water chamber 221 near the first liquid outlet 222. The third liquid outlet 223 is tangent to the lower wall of the cold water chamber 221. The number of third liquid outlets 223 is the same as the number of liquid replenishment pumps 231 and they correspond one-to-one. The third liquid outlet 223 is connected to the inlet of the liquid replenishment pump 231 through a pipe.

[0039] Reference Figure 5 and Figure 6 A third liquid inlet 2125 is provided on the cavity wall of the hot water cavity 2121 near the opening of the mounting groove 13. The third liquid inlet 2125 is tangent to the upper cavity wall of the hot water cavity 2121 and is connected to the outlet of the replenishment pump 231 through a pipe. The replenishment assembly 23 also includes a float 232, a first sensor 233, and a second sensor 234. The float 232 is slidably embedded in the hot water cavity 2121, and the sliding direction of the float 232 is vertical. A guide groove 2126 is provided on the cavity wall of the hot water cavity 2121 near the upper mold base 11 or the lower mold base 12. A guide block 2321 is fixedly connected to the groove wall of the float 232 and is slidably embedded in the guide groove 2126. A magnetic block is embedded in the float 232. A first groove 2127 is provided on the cavity wall of the hot water cavity 2121 away from the guide groove 2126. A sensor 233 is embedded in the first groove 2127. A second groove 2128 is provided on the side wall of the hot water chamber 2121 away from the guide groove 2126. The second groove 2128 is located on the side of the first groove 2127 away from the lower wall of the hot water chamber 2121. A second sensor 234 is embedded in the second groove 2128. The first groove 2127 and the second groove 2128 are located between the second liquid outlet 2122 and the overflow outlet 2124. The first sensor 233 and the second sensor 234 are used to detect the position of the magnetic block in the float 232 and send a signal to the controller. In this embodiment, both the first sensor 233 and the second sensor 234 are magnetic sensors. When the first sensor 233 detects the magnetic block in the float 232, the guide block 2321 abuts against the side wall of the guide groove 2126 near the lower cavity wall of the hot water chamber 2121, and the replenishment pump 231 operates. When the second sensor 234 detects the magnetic block in the float 232, the guide block 2321 abuts against the side wall of the guide groove 2126 away from the lower cavity wall of the hot water chamber 2121, and the replenishment pump 231 stops.

[0040] The implementation principle of a mold frame with a cooling structure in this application embodiment is as follows: when the upper mold base 11 and the lower mold base 12 are closed, two contact switches 31 respectively abut against the upper mold base 11 or the lower mold base 12, the contact switches 31 are closed, and the controller controls two water pumps 211 to work and introduce liquid into the cooling chamber 14.

[0041] When raw material is introduced into the molding cavity between the two mold cores, the controller controls the heating wire 41 to heat it. The electromagnetic three-way valve 213 connects the hot water tank 212 and the water pump 211. The water pump 211 sends the liquid in the hot water cavity 2121 into the cooling cavity 14. The heating wire 41 heats the liquid in the cooling cavity 14 to ensure that the raw material is in a molten state and can smoothly reach all corners of the molding cavity. When the liquid in the hot water tank 212 is insufficient, the first sensor 233 detects the float 232 and sends a signal to the controller. The controller controls the replenishing pump 231 to work, sending the liquid in the cold water tank 22 into the hot water cavity 2121. As the liquid level in the hot water cavity 2121 rises, the float 232 moves upward. When the second sensor 234 detects the float 232, the second sensor 234 sends a signal to the controller, and the controller controls the replenishing pump 231 to stop.

[0042] After the raw material supply is stopped, the controller stops the heating wire 41. The electromagnetic three-way valve 213 connects the cold water tank 22 and the water pump 211. The water pump 211 sends the liquid in the cold water tank 22 into the cooling chamber 14. The liquid with a higher temperature in the cooling chamber 14 is sent into the hot water chamber 2121 through the liquid outlet channel 16. When there is too much liquid in the hot water chamber 2121, the liquid flows out through the overflow port 2124 and heats the cold water chamber 221 through the return port 224. The liquid with a lower temperature in the cooling chamber 14 cools the product in the molding chamber.

[0043] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A mold frame with a cooling structure, characterized in that: The system includes an upper mold base (11), a lower mold base (12), and a water pump (211). The upper mold base (11) near the lower mold base (12) and the lower mold base (12) near the upper mold base (11) are both provided with mounting grooves (13). The mounting grooves (13) are used for inserting mold cores. Both the upper mold base (11) and the lower mold base (12) are provided with cooling chambers (14). The cooling chambers (14) surround the mounting grooves (13). The walls of the cooling chambers (14) are respectively provided with an inlet channel (15) and an outlet channel (16). The number of water pumps (211) is the same as the sum of the number of upper mold bases (11) and lower mold bases (12), and they correspond one-to-one. The water pumps (211) are connected to either the upper mold base (11) or the lower mold base (12). The water pumps (211) are connected to the inlet channels (15) via pipes.

2. The mold frame with a cooling structure according to claim 1, characterized in that: It also includes a controller and a contact switch (31); the upper mold base (11) is provided with a groove (17) on the side near the lower mold base (12) or the lower mold base (12) is near the upper mold base (11); the contact switch (31) is embedded in the groove (17); the contact switch (31) is used to abut against the upper mold base (11) or the lower mold base (12); the controller is connected to the upper mold base (11); the controller is used to control the operation of the water pump (211); when the contact switch (31) is closed, the water pump (211) starts.

3. The mold frame with a cooling structure according to claim 2, characterized in that: It also includes a heating wire (41); the upper mold base (11) or the lower mold base (12) is provided with an annular cavity (18); the heating wire (41) is embedded in the sliding groove; the controller is used to control the operation of the heating wire (41); when raw material is introduced into the forming cavity between the two mold cores, the heating wire (41) operates.

4. The mold frame with a cooling structure according to claim 3, characterized in that: It also includes a hot water tank (212); the number of hot water tanks (212) is the same as the number of water pumps (211) and they correspond one-to-one; the hot water tank (212) is connected to the upper mold base (11) or the lower mold base (12); the hot water tank (212) is provided with a hot water chamber (2121); the upper wall of the hot water chamber (2121) is provided with a second liquid inlet (2123); the second liquid inlet (2123) is connected to the liquid outlet channel (16) through a pipe.

5. The mold frame with a cooling structure according to claim 4, characterized in that: The liquid outlet channel (16) is provided in two ways; the two liquid outlet channels (16) are symmetrically distributed along the mold closing direction perpendicular to the upper mold base (11) and the lower mold base (12); the number of the second liquid inlet (2123) is the same as the number of liquid outlet channels (16) and they correspond one-to-one.

6. The mold frame with a cooling structure according to claim 4, characterized in that: It also includes a cold water tank (22) and an electromagnetic three-way valve (213); the cold water tank (22) is provided with a cold water chamber (221); the electromagnetic three-way valve (213) is connected to the upper mold base (11) or the lower mold base (12); the electromagnetic three-way valve (213) is connected to the hot water chamber (2121), the cold water chamber (221) and the water pump (211) through a pipe; when the heating wire (41) is working, the electromagnetic three-way valve (213) connects the hot water chamber (2121) and the water pump (211).

7. The mold frame with a cooling structure according to claim 6, characterized in that: It also includes a replenishment assembly (23); the number of replenishment assemblies (23) is the same as the number of hot water tanks (212) and they correspond one-to-one; the replenishment assembly (23) includes a replenishment pump (231), a float (232), a first sensor (233), and a second sensor (234); the replenishment pump (231) is connected to the cold water tank (22); the replenishment pump (231) is used to transport the liquid in the cold water chamber (221) to the hot water chamber (2121); the controller is used to control the operation of the replenishment pump (231); the float (232) is used to transport the liquid in the cold water chamber (221) to the hot water chamber (2121); the controller is used to control the operation of the replenishment pump (231); the float (232) is used to transport the liquid in the cold water chamber (221) to the hot water chamber (2121); the controller is used to control the operation of the replenishment pump (231); the float (232) is used to transport the liquid in the cold water chamber (221) to the hot water chamber (2121); the float (232) is used to transport the liquid in the cold water chamber (221) to the hot water chamber (2121); the first sensor (23 ... 32) Slidingly embedded in the hot water chamber (2121); the first sensor (233) and the second sensor (234) are embedded in the hot water chamber (2121); the first sensor (233) and the second sensor (234) are distributed at intervals along the sliding direction of the float (232); the first sensor (233) and the second sensor (234) are used to detect the position of the float (232) and send a signal to the controller; when the first sensor (233) detects the float (232), the replenishment pump (231) works.

8. The mold frame with a cooling structure according to claim 7, characterized in that: The hot water chamber (2121) is provided with an overflow port (2124); the overflow port (2124) is connected to the cold water chamber (221) through a pipe.

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