Multi-adjustment system for mold cooling structure

Abstract

This invention provides a multi-adjustment system for a mold cooling structure that prevents deformation of the injected material while it is being cooled by freely supplying water of various temperatures through channels formed in the injection mold and freely adjusting the temperature of each part of the injection mold. [Solution] The multi-adjustment system for the mold cooling structure operates by driving the water supply pump when the temperature of the water stored in the cold and hot water tanks is adjusted to a predetermined temperature. The water stored in the cold and hot water tanks is supplied to the converter / distributor, and when the on / off valves provided in the converter / distributor are adjusted, the water supplied to each supply branch pipe is supplied to the first supply pipe 21, then passes through the flow path of the cooling core 10, heating or cooling the cooling core and the upper and lower mold parts 1 and 2 to different temperatures, and then is returned to the cold and hot water tanks of the temperature control unit via the first return pipe 22 and the return branch pipe. The temperature of the cooling core and the upper and lower mold parts can be freely adjusted.

Description

Technical Field

[0001] The present invention relates to a multi - adjustment system for a mold cooling structure with a new structure that can prevent an injection - molded product from being deformed while being cooled by freely supplying cooling water at various temperatures through a flow path formed in an injection mold and freely adjusting the temperature of each part of the injection mold.

Background Art

[0002] Generally, an injection mold used when injecting synthetic resin products is composed of upper and lower molds with a cavity formed on an adjacent surface. In a state where the upper and lower molds are engaged with each other, synthetic resin is injected into the cavity to manufacture an injection - molded product in a desired form.

[0003] However, since the synthetic resin injected into such an injection mold is heated to a high temperature and holds a large amount of latent heat, when injecting such a high - temperature synthetic resin into the injection mold, the injection mold is heated. When repeatedly manufacturing injection - molded products using such a heated mold, the manufactured injection - molded products are extracted in a state where they cannot be sufficiently cooled. As a result, a problem occurs in that such insufficiently cooled injection - molded products are deformed while being cooled to room temperature.

[0004] Therefore, in recent years, a method has been developed and used in which a flow path through which cooling water passes is formed inside the upper and lower molds, and cooling water is supplied to the flow path to cool the upper and lower molds, so that the injection - molded products are extracted after being sufficiently cooled.

[0005] However, conventionally, since simply low - temperature cooling water is supplied to the flow path to uniformly cool the entire mold, there is a problem that it is difficult to accurately adjust the temperature of each part of the mold.

[0006] In other words, in order to prevent deformation of the injection-molded product, it is preferable to precisely control the temperature of each part of the mold according to the shape of the injection-molded product. However, conventional methods simply supply cooling water of the same temperature to the flow path to lower the temperature of the entire mold, which has resulted in the problem that it is difficult to effectively prevent deformation of the injection-molded product as it cools after it has been extracted from the mold cavity. Therefore, a new method was needed to solve these problems. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Registered Patent No. 10-1210224 of the Republic of Korea [Overview of the project] [Problems that the invention aims to solve]

[0008] The present invention aims to solve the above-mentioned problems and provides a new multi-adjustment system for a mold cooling structure that prevents deformation of the injected material while it is being cooled by freely supplying water of various temperatures through a flow path formed in the injection mold and freely adjusting the temperature of each part of the injection mold. [Means for solving the problem]

[0009] To achieve the above objective, the present invention provides a cavity 3 formed on an adjacent surface, and in the lower molds 1 and 2, the interior of the upper mold 1 or the lower mold 2 is one or Multiple flow channels 11 and connected to the flow channels 11 one or Multiple connecting passages 5 are formed, one orA multi-temperature control system for a mold cooling structure is provided, further comprising: a converter / distributor A connected to the connecting passage 5 via a plurality of first supply pipes 21 and a first return pipe 22; a multi-temperature controller B connected to the converter / distributor A via a second supply pipe 31 and a second return pipe 32; and control means 50 for controlling the operation of the converter / distributor A and the multi-temperature controller B, wherein the multi-temperature controller B is used to supply water adjusted to various temperatures to the converter / distributor A, and the converter / distributor A is used to supply the water supplied by the multi-temperature controller B to different flow paths 11.

[0010] According to another feature of the present invention, the conversion distributor A includes a distribution case 23, a plurality of supply branch pipes 24 connecting the first supply pipe 21 and the second supply pipe 31, a plurality of return branch pipes 25 connecting the first return pipe 22 and the second return pipe 32, and on-off valves 26 provided on the supply branch pipe 2 and the return branch pipe 25, wherein the supply branch pipe 24 has a plurality of supply branch sections 24a formed at its front end, each connected to the first supply pipe 21, and its rear end is connected to any one of the second supply pipes 31. A multi-adjustment system for a mold cooling structure is provided, characterized in that the return branch pipe 25 is configured such that a plurality of return branch sections 25a are formed at its front end, each connected to the first return pipe 22, and its rear end is connected to one of the second return pipes 32, and the on / off valve 26 is provided at the supply branch section 24a and the return branch section 25a, and is configured to control the flow of water passing through the respective supply branch section 24a and the return branch section 25a.

[0011] According to yet another feature of the present invention, the multi-temperature controller B includes a temperature control case 33 and a plurality of temperature control units 40 provided inside the temperature control case 33 and connected to the second supply pipe 31 and the second return pipe 32, wherein the second supply pipe 31 and the second return pipe 32 are connected to the rear ends of the supply branch section 24 and the return branch pipe 25, respectively, and the temperature control unit 40 includes cold and hot water tanks 41 and 42 in which water is stored, a third supply pipe 43 connecting the cold and hot water tanks 41 and 42 in parallel to the second supply pipe 31, a third return pipe 44 connecting the cold and hot water tanks 41 and 42 in parallel to the second return pipe 32, a water supply pump 45 provided on the third supply pipe 43, and temperature control means 46 connected to the cold and hot water tanks 41 and 42 for adjusting the temperature of the water stored in the cold and hot water tanks 41 and 42.

[0012] Another feature of the present invention provides a multi-adjustment system for a mold cooling structure, characterized in that a space 4 is formed inside the upper mold 1 or lower mold 2, the space 4 is provided with a plurality of cooling cores 10 having the flow channels 11 formed on their peripheral surfaces, and a connecting passage 5 is formed inside the upper mold 1 or lower mold 2, one end of which is connected to the cooling cores 10 and the other end of which extends to the outside of the upper and lower molds 1 and 2.

[0013] According to another feature of the present invention, a multi-adjustment system for a mold cooling structure is provided, characterized in that the cooling core 10 is configured in a rectangular block shape extending in the vertical direction, and the flow path 11 includes vertical grooves 11a formed in a concave shape on both sides of the cooling core 10 so as to extend in the vertical direction, and connecting grooves 11b formed in a concave shape on the upper or lower side of the cooling core 10 so as to connect the vertical grooves 11a.

[0014] Another feature of the present invention provides a multi-adjustment system for a mold cooling structure, characterized in that the cooling core 10 provided in the space 4 is configured such that the direction of the connecting groove 11b intersects with that of another cooling core 10 that is in close contact with the side surface.

[0015] According to yet another feature of the present invention, the upper mold 1 is composed of an upper mold body 1a having a cavity 3 formed on its lower surface and a recessed space 4 formed on its upper surface, and an upper lid 1b coupled to the upper surface of the upper mold body 1a to seal the space 4; the lower mold 2 is composed of a lower mold body 2a having a cavity 3 formed on its upper surface and a recessed space 4 formed on its lower surface, and a lower lid 2b coupled to the lower surface of the lower mold body 2a to seal the space 4; and the connecting passage 5 is formed so that one side is connected to the vertical groove 11a inside the upper lid 1b and the lower lid 2b, and the other side extends outside the upper lid 1b and the lower lid 2b.

[0016] Another feature of the present invention provides a multi-temperature control system for a mold cooling structure, further comprising: a pressurizing means 51 connected to the third supply pipe 43 and the third return pipe 44 of the multi-temperature controller B to supply high-pressure water to the third supply pipe 43 and the third return pipe 44; a pressure sensor 52 provided in the third supply pipe 43 and the third return pipe 44 to measure the internal pressure of the third supply pipe 43 and the third return pipe 44; and an alarm means 53 connected to the control means 50, wherein the control means 50 drives the pressurizing means 51 to supply high-pressure water to the third supply pipe 43 and the third return pipe 44, receives a signal from the pressure sensor 52, and determines that the connection state of the first and second supply pipes 21, 31 and the first and second return pipes 22, 32 is poor if the pressure in the third supply pipe 43 and the third return pipe 44 does not rise above a preset reference pressure, and drives the alarm means 53 to notify the operator of this. [Effects of the Invention]

[0017] In the multi-adjustment system for mold cooling structure according to the present invention, when the water supply pump 45 is driven while the temperature of the water stored in the cold and hot water tanks 41 and 42 is adjusted to a predetermined temperature, the water stored in the cold and hot water tanks 41 and 42 is supplied to the converter / distributor A. When the on / off valve 26 provided in the converter / distributor A is adjusted, the water supplied to each supply branch pipe 24 is supplied to any first supply pipe 21, then passes through the flow path 11 of the cooling core 10, heating or cooling the cooling core 10 and the upper and lower molds 1 and 2 to different temperatures, and then is returned to the cold and hot water tanks 41 and 42 of the temperature control unit 40 via the first return pipe 22 and the return branch pipe 25. Therefore, the temperature of the cooling core 10 and each part of the upper and lower molds 1 and 2 can be freely adjusted.

[0018] In particular, the on / off valve 26 can be controlled as needed during the injection cycle to convert the water supplied to the cooling core 10 to high-temperature or low-temperature water, allowing for free adjustment of the injection time, and the pressure and flow rate of the water supplied to each cooling core 10 can be freely adjusted.

[0019] In other words, by adjusting the on-off valve 26 so that the water supplied to the two supply branch pipes 24 is supplied to one first supply pipe 21, the pressure and flow rate of the water supplied to the cooling core 10 via the first supply pipe 21 increase, thereby heating or cooling the temperature of the cooling core 10 connected to the first supply pipe 21 more quickly, and thus the upper and lower molds 1 and 2 can be adjusted more quickly.

[0020] Therefore, by extracting the injection material after the synthetic resin injected into the upper and lower molds 1 and 2 has been sufficiently cooled, it is possible to prevent deformation of the injection material that has not been sufficiently cooled while cooling at room temperature, thereby improving product quality. At the same time, it is possible to improve the cooling speed of the upper and lower molds 1 and 2, shorten the time required to cool the upper and lower molds 1 and 2, and improve productivity. [Brief explanation of the drawing]

[0021] [Figure 1] It is a configuration diagram showing a multi - adjustment system for a mold cooling structure according to the present invention. [Figure 2] It is a front cross - sectional view showing the upper and lower molds of the multi - adjustment system for a mold cooling structure according to the present invention. [Figure 3] It is a front cross - sectional view showing the disassembled state of the upper and lower molds of the multi - adjustment system for a mold cooling structure according to the present invention. [Figure 4] It is a front cross - sectional view showing the separated state of the cooling core of the upper mold of the multi - adjustment system for a mold cooling structure according to the present invention. [Figure 5] It is a perspective view showing the cooling core of the multi - adjustment system for a mold cooling structure according to the present invention. [Figure 6] It is a plan view of the upper mold of the multi - adjustment system for a mold cooling structure according to the present invention. [Figure 7] It is a configuration diagram showing the conversion distributor of the multi - adjustment system for a mold cooling structure according to the present invention. [Figure 8] It is a configuration diagram showing the multi - temperature regulator of the multi - adjustment system for a mold cooling structure according to the present invention. [Figure 9] It is a block diagram of the multi - adjustment system for a mold cooling structure according to the present invention. [Figure 10] It is a configuration diagram showing the multi - temperature regulator of the second embodiment of the multi - adjustment system for a mold cooling structure according to the present invention. [Figure 11] It is a block diagram of the second embodiment of the multi - adjustment system for a mold cooling structure according to the present invention.

Embodiments for Carrying Out the Invention

[0022] Hereinafter, the present invention will be described in detail based on the attached exemplary drawings. FIGS. 1 to 9 show a multi - adjustment system for a mold cooling structure according to the present invention, and illustrate manufacturing a lens made of a synthetic resin material with a convex shape on the upper side at the central part.

[0023] According to this, the multi-adjustment system for the mold cooling structure according to the present invention is the same as in the conventional system, in that a cavity 3 is formed on the adjacent surface and lower molds 1 and 2 are provided.

[0024] Furthermore, according to the present invention, a plurality of flow paths 11 and a plurality of connecting passages 5 connected to the flow paths 11 are formed inside the upper mold 1 or lower mold 2, a converter / distributor A connected to the connecting passages 5 via a plurality of first supply pipes 21 and a first return pipe 22, a multi-temperature controller B connected to the converter / distributor A via a second supply pipe 31 and a second return pipe 32, and control means 50 for controlling the operation of the converter / distributor A and the multi-temperature controller B are further provided, and the multi-temperature controller B is used to supply water adjusted to various temperatures to the converter / distributor A, and the converter / distributor A is used to supply the water supplied by the multi-temperature controller B to different flow paths 11.

[0025] For this purpose, as shown in Figures 2 to 6, a space 4 is formed inside the upper and lower molds 1 and 2, and a plurality of cooling cores 10 are provided in the space 4. Inside the upper mold 1 or lower mold 2, a connecting passage 5 is formed, one end of which is connected to the cooling cores 10 and the other end of which extends to the outside of the upper and lower molds 1 and 2.

[0026] To explain this in more detail, the upper mold 1 consists of an upper mold body 1a with a cavity 3 formed on its lower side and the space 4 formed in a concave shape on its upper surface, and an upper lid 1b which is coupled to the upper surface of the upper mold body 1a and seals the space 4. In this case, the cavity 3 of the upper mold 1 is configured with a concave shape in the center that faces upwards.

[0027] The lower mold 2 is composed of a lower mold body 2a, which has the cavity 3 formed on its upper surface and the space 4 formed in a concave shape on its lower surface, and a lower lid 2b which is coupled to the lower surface of the lower mold body 2a and seals the space 4. At this time, the upper lid 1b and the lower lid 2b are screwed onto the upper mold body 1a and the lower mold body 2a by fixing bolts 6. As shown in Figure 6, the aforementioned space 4 is composed of a rectangle between the upper mold body 1a and the lower mold body 2a.

[0028] The cooling core 10 is composed of a rectangular block shape extending in the vertical direction, and is configured to be installed in the space 4 by inserting a large number of them so that their sides are in close contact with each other. Furthermore, a channel 11 through which water passes is formed on the peripheral surface of the cooling core 10.

[0029] As shown in Figures 3 to 5, the flow path 11 is composed of vertical grooves 11a formed in a concave shape on both sides of the cooling core 10 so as to extend vertically, and connecting grooves 11b formed in a concave shape on the upper or lower side of the cooling core 10 so as to connect the vertical grooves 11a, so that water supplied to one side of the vertical groove 11a is discharged to the outside through the connecting groove 11b and the other side of the vertical groove 11a.

[0030] For this purpose, as shown in Figure 6, the cooling core 10 provided in the space 4 is configured such that the direction of the connecting groove 11b intersects with that of other cooling cores 10 that are in close contact with the side surface.

[0031] In other words, when one cooling core 10 is positioned so that the connecting groove 11b faces left to right, the cooling core 10 that is in close contact with the slanted surface of the peripheral edge of this cooling core 10 is positioned so that the connecting groove 11b faces front to back.

[0032] When the cooling core 10 is placed inside the space 4 in this manner, the outer surface of the vertical groove 11a formed in the cooling core 10 is sealed by the peripheral surface of another cooling core 10 that is positioned in close contact with the side surface, and the connecting groove 11b is in close contact with the bottom surface inside the space 4, so that the vertical groove 11a and the connecting groove 11b form a closed flow path 11.

[0033] In this configuration, the cooling core 10 located inside the upper mold 1 is positioned so that the connecting groove 11b faces downwards, while the cooling core 10 located inside the lower mold 2 is positioned so that the connecting groove 11b faces upwards.

[0034] The connecting passage 5 is formed inside the upper lid 1b and lower lid 2b provided in the upper and lower molds 1 and 2, with one end connected to the flow path 11 of the cooling core 10 and the other end extending to the outside of the upper lid 1b and lower lid 2b.

[0035] Therefore, when water at different temperatures is supplied to the connecting passage 5 using the conversion distributor A and the multi-temperature controller B, the supplied water flows along the flow path 11 formed in the connecting passage 5 and the cooling core 10, heating or cooling the cooling core 10, thereby regulating the temperature of each part of the upper and lower molds 1 and 2. In this case, the number of cooling cores 10 can be varied depending on the size and shape of the upper and lower molds 1 and 2.

[0036] As shown in Figure 7, the conversion distributor A consists of a distribution case 23, a plurality of supply branch pipes 24 connecting the first supply pipe 21 and the second supply pipe 31, a plurality of return branch pipes 25 connecting the first return pipe 22 and the second return pipe 32, and on / off valves 26 provided on the supply branch pipes 24 and the return branch pipes 25.

[0037] The supply branch pipe 24 has a plurality of supply branch sections 24a formed at its front end, each connected to the first supply pipe 21, and its rear end is configured to be connected to one of the second supply pipes 31.

[0038] The return branch pipe 25 has a plurality of return branch sections 25a formed at its front end, each connected to the first return pipe 22, and its rear end is configured to be connected to one of the second return pipes 32. In this configuration, the number of supply branch sections 24a of the supply branch pipe 24 and the return branch sections 25a of the return branch pipe 25 are configured to be the same as the number of cooling cores 10.

[0039] For example, in Figure 1, the upper mold 1 is equipped with four cooling cores 10, and the supply branching section 24a and the return branching section 25a are composed of the same four components as the cooling cores 10.

[0040] The supply branch sections 24a and return branch sections 25a provided in each supply branch pipe 24 and return branch pipe 25 are connected in parallel to the first supply pipe 21 and the first return pipe 22, and are connected to both ends of the flow channels 11 formed in the four cooling cores 10 provided in the upper mold 1.

[0041] The on-off valve 26 uses solenoid valves, one each provided in the supply branch section 24a and the return branch section 25a, and is operated and controlled by the control means 50 to control the flow of water passing through the respective supply branch section 24a and return branch section 25a.

[0042] Therefore, the on / off valve 26 can be controlled so that the water supplied through the uppermost supply branch pipe 24 is supplied through the supply branch section 24a to any of the four first supply pipes 21, and in this way the water supplied to the flow path 11 through the first supply pipes 21 is controlled to be returned to any return branch pipe 25.

[0043] As shown in Figures 1 and 8, the multi-temperature controller B consists of a temperature control case 33 and a plurality of temperature control units 40 provided inside the temperature control case 33 and connected to the second supply pipe 31 and the second return pipe 32. The second supply pipe 31 and the second return pipe 32 are connected to the rear ends of the supply branch pipe 24 and the return branch pipe 25.

[0044] The temperature control unit 40 comprises cold and hot water tanks 41 and 42 in which water is stored, a third supply pipe 43 connecting the cold and hot water tanks 41 and 42 in parallel to the second supply pipe 31, a third return pipe 44 connecting the cold and hot water tanks 41 and 42 in parallel to the second return pipe 32, a water supply pump 45 provided on the third supply pipe 43, and a temperature control means 46 connected to the cold and hot water tanks 41 and 42 to adjust the temperature of the water stored in the cold and hot water tanks 41 and 42. The temperature control unit 40 is connected to the converter / distributor A via the second supply pipe 31 and the second return pipe 32, and is configured to supply temperature-controlled water to the converter / distributor A.

[0045] The third supply pipe 43 has its front end connected to the second supply pipe 31, and its rear end has a branching section 43a which branches into two and connects to the cold and hot water tanks 41 and 42, respectively.

[0046] The third return pipe 44 has its front end connected to the second return pipe 32, and its rear end has a branching section 44a which branches into two and connects to the cold and hot water tanks 41 and 42, respectively.

[0047] The water supply pumps 45 are provided at the branch sections 43a of the third supply pipe 43, and when operated, they are configured to supply water stored in the cold water tank 41 or the hot water tank 42 to the second supply pipe 31 via the third supply pipe 43.

[0048] The temperature control means 46 consists of a temperature sensor 46a located inside the cold and hot water tanks 41 and 42, a heater 46b located inside the cold and hot water tanks 41 and 42, and a cooler 46c connected to the cold and hot water tanks 41 and 42 for air-cooling the water stored in the cold and hot water tanks 41 and 42. Depending on the operation, the means can heat or cool the water stored in the cold and hot water tanks 41 and 42 to various temperatures.

[0049] The control means 50 receives a signal from the temperature sensor 46a, measures the temperature of the water stored in the cold and hot water tanks 41 and 42, and controls the water supply pump 45 and the temperature control means 46 to adjust the temperature of the water stored in the cold and hot water tanks 41 and 42 to the input temperature, i.e., high or low temperature.

[0050] Furthermore, the control means 50 controls the on-off valve 26 provided in the conversion distributor A so that the water supplied by each temperature control unit 40 passes through a preset path, is supplied to the flow path 11 of the cooling core 10 provided in the upper and lower molds 1 and 2, and then passes through a preset path to be returned to the cold and hot water tanks 41 and 42 of the temperature control unit 40.

[0051] At this time, a water supply pipe 47 for supplying water is connected to the cold and hot water tanks 41 and 42, and a water level control valve 48 is provided in the water supply pipe 47 so that the water level in the cold and hot water tanks 41 and 42 is maintained at a constant level. Then, the temperatures of the water stored in the cold and hot water tanks 41 and 42 of each temperature control unit 40 are adjusted to be different from each other.

[0052] For example, the temperature of the water stored in the chilled water tank 41 provided in each temperature control unit 40 can be adjusted to 0-120 degrees, and the temperature of the water stored in the hot water tank 42 provided in each temperature control unit 40 can be adjusted to 0-180 degrees or higher. The method for manufacturing injection-molded products using the multi-adjustment system of the mold cooling structure configured in this way is as follows.

[0053] First, the control means 50 controls the temperature control means 46 to adjust the temperature of the water stored in the cold and hot water tanks 41 and 42 provided in each temperature control unit 40.

[0054] The control means 50 then drives the water supply pump 45 and controls the on / off valve of the converter / distributor A to adjust the temperature of the cooling cores 10 so that water at different temperatures is selectively supplied to each of the cooling cores 10, thereby heating the respective parts of the upper mold 1 and the lower mold 2.

[0055] At this time, among the cooling cores 10 provided in the upper mold 1 shown in Figures 2 to 4, the temperature of the cooling core 10 provided in the central part where the cavity 3 is taller can be adjusted to the lowest temperature of 65 degrees, while the temperature of the cooling core 10 provided in the peripheral part where the cavity 3 is shorter can be adjusted to the highest temperature of 85 degrees. Then, synthetic resin is injected into the cavities 3 formed in the upper mold 1 and the lower mold 2. By heating the upper mold 1 and the lower mold 2 in this manner, and then injecting the synthetic resin into the cavity 3, the synthetic resin can be smoothly injected into the cavity 3.

[0056] Then, using the multi-temperature controller B and the conversion distributor A, water at different temperatures is supplied to the flow paths 11 of each cooling core 10, so that the cooling cores 10 are cooled to different temperatures, thereby cooling each part of the upper mold 1 and the lower mold 2 to different temperatures. For example, the cooling core 10 located in the center can be temperature-controlled to 35 degrees, and the cooling core 10 located at the periphery can be temperature-controlled to 65 degrees.

[0057] In this state, the control means 50 can control the on-off valve 26 to supply water at various pressures to the cooling core 10, and can freely switch between cold and hot water as needed before supplying it to the cooling core 10.

[0058] Furthermore, by adjusting the on-off valve 26 so that the water supplied to the two supply branch pipes 24 is supplied to one first supply pipe 21, the pressure and flow rate of the water supplied to the cooling core 10 via the first supply pipe 21 increase, allowing the temperature of the cooling core 10 connected to the first supply pipe 21 to be heated or cooled more quickly.

[0059] When the temperatures of the upper mold 1 and lower mold 2 decrease in this way, the synthetic resin supplied to the cavity 3 cools down, completing the injection molding. When the completed injection molding is removed, the temperature of the entire molding becomes uniform, preventing deformation from occurring due to temperature variations between different parts of the completed molding.

[0060] In the multi-adjustment system of the mold cooling structure configured in this way, when the water supply pump 45 is driven while the temperature of the water stored in the cold and hot water tanks 41 and 42 is adjusted to a predetermined temperature, the water stored in the cold and hot water tanks 41 and 42 is supplied to the converter / distributor A. When the on / off valve 26 provided in the converter / distributor A is adjusted, the water supplied to each supply branch pipe 24 is supplied to any first supply pipe 21, then passes through the flow path 11 of the cooling core 10, heating or cooling the cooling core 10 and the upper and lower molds 1 and 2 to different temperatures, and then is returned to the cold and hot water tanks 41 and 42 of the temperature control unit 40 via the first return pipe 22 and the return branch pipe 25. Therefore, the temperature of the cooling core 10 and each part of the upper and lower molds 1 and 2 can be freely adjusted.

[0061] In particular, the on / off valve 26 can be controlled as needed during the injection cycle to convert the water supplied to the core 10 to high-temperature or low-temperature water, allowing for free adjustment of the injection time, and the pressure and flow rate of the water supplied to each cooling core 10 can be freely adjusted.

[0062] In other words, by adjusting the on-off valve 26 so that the water supplied to the two supply branch pipes 24 is supplied to one first supply pipe 21, the pressure and flow rate of the water supplied to the cooling core 10 via the first supply pipe 21 increase, thereby heating or cooling the temperature of the cooling core 10 connected to the first supply pipe 21 more quickly, and thus the upper and lower molds 1 and 2 can be adjusted more rapidly.

[0063] Therefore, by extracting the injection material after the synthetic resin injected into the upper and lower molds 1 and 2 has been sufficiently cooled, it is possible to prevent deformation of the injection material that has not been sufficiently cooled while cooling at room temperature, thereby improving product quality. At the same time, it is possible to improve the cooling speed of the upper and lower molds 1 and 2, shorten the time required to cool the upper and lower molds 1 and 2, and improve productivity.

[0064] Furthermore, a space 4 is formed inside the upper mold 1 or lower mold 2, and a plurality of cooling cores 10 are provided in the space 4. Inside the upper mold 1 or lower mold 2, a connecting passage 5 is formed, one end of which is connected to the cooling cores 10 and the other end of which extends to the outside of the upper and lower molds 1 and 2. This makes it very easy to form a flow path 11 in the upper and lower molds 1 and 2, and has the advantage of making the design and manufacture of the flow path 11 even easier.

[0065] Furthermore, the cooling core 10 is composed of a rectangular block shape extending in the vertical direction, and a flow channel 11 is formed on the peripheral surface of the cooling core 10. The flow channel 11 is composed of vertical grooves 11a formed in a concave shape extending in the vertical direction on both sides of the cooling core 10, and connecting grooves 11b formed in a concave shape on the upper or lower surface of the cooling core 10 to connect the vertical grooves 11a, which has the advantage of simplifying the structure of the cooling core 10.

[0066] Furthermore, the cooling core 10 provided in the space 4 is configured such that the directions of the connecting groove 11b intersect with those of other cooling cores 10 that are in close contact with the side surface. This has the advantage that the flow path 11 is sealed by the other cooling cores 10 provided on the side surface, effectively preventing the water passing through the flow path 11 from flowing out to the outside.

[0067] The upper mold 1 is composed of an upper mold body 1a with a cavity 3 formed on its lower side and a recessed space 4 formed on its upper surface, and an upper lid 1b that is coupled to the upper surface of the upper mold body 1a to seal the space 4. The lower mold 2 is composed of a lower mold body 2a with a cavity 3 formed on its upper surface and a recessed space 4 formed on its lower side, and a lower lid 2b that is coupled to the lower surface of the lower mold body 2a to seal the space 4. The connecting passage 5 is formed so that one end is connected to the vertical groove 11a inside the upper lid 1b and the lower lid 2b, and the other end extends to the outside of the upper lid 1b and the lower lid 2b, which has the advantage of simplifying the shape of the flow path 11 and making it easier to process the flow path 11.

[0068] In the embodiment described above, the space 4 and the cooling core 10 were exemplified as being composed of a rectangle, but the space 4 and the cooling core 10 may be composed of polygons including triangles and hexagons. In this embodiment, it has been illustrated that a plurality of flow channels 11 and a plurality of connecting passages 5 connected to the flow channels 11 are formed inside the upper mold 1 or the lower mold 2. However, only one flow channel 11 and one connecting passage 5 may be formed. In such a case, only one first supply pipe 21 and one first return pipe 22 are also provided.

[0069] Figures 10 and 11 show a second embodiment according to the present invention, further comprising: a pressurizing means 51 connected to the third supply pipe 43 and the third return pipe 44 of the multi-temperature controller B to supply high-pressure water to the third supply pipe 43 and the third return pipe 44; a pressure sensor 52 provided in the third supply pipe 43 and the third return pipe 44 to measure the pressure inside the third supply pipe 43 and the third return pipe 44; and an alarm means 53 connected to the control means 50.

[0070] The pressurizing means 51 is connected via a water supply pipe 51a to the third supply pipe 43 and the third return pipe 44 provided in all temperature control units 40 of the multi-temperature controller B, and is configured to supply water stored in a separately provided water tank (not shown) to the third supply pipe 43 and the third return pipe 44 by pressurizing it using a pump.

[0071] Therefore, when the pressurizing means 51 is driven, high-pressure water is supplied to the third supply pipe 43 and the third return pipe 44, and the pressure inside the third supply pipe 43 and the third return pipe 44 rises to a predetermined pressure.

[0072] The pressure sensor 52 is provided in the third supply pipe 43 and the third return pipe 44, respectively, of all temperature control units 40 provided in the multi-temperature controller B, and measures the pressure inside the third supply pipe 43 and the third return pipe 44. The alarm means 53 is configured to output a warning light and an alarm sound when activated.

[0073] When the multi-temperature controller B is turned on, the control means 50 drives the pressurizing means 51 to supply high-pressure water to the third supply pipe 43 and the third return pipe 44 while receiving the signal from the pressure sensor 52. If the pressure in the third supply pipe 43 and the third return pipe 44 does not rise above a preset reference pressure, the control means 50 determines that the connection between the first and second supply pipes 21, 31 and the first and second return pipes 22, 32 is poor and the supplied water will leak out, and drives the alarm means 53 to notify the worker.

[0074] In other words, when the cooling core 10, the converter / distributor A, and the multi-temperature controller B are precisely connected to each other by the first and second supply pipes 21, 31 and the first and second return pipes 22, 32, when high-pressure water is supplied to the inside of the third supply pipe 43 and the third return pipe 44, the water cannot flow out to the outside, and as a result the pressure inside the third supply pipe 43 and the third return pipe 44 increases.

[0075] Conversely, if the first and second supply pipes 21, 31 or the first and second return pipes 22, 32 are not properly connected due to an error by the operator, or if an abnormality occurs in the first and second supply pipes 21, 31 or the first and second return pipes 22, 32, supplying water to the inside of the third supply pipe 43 and the third return pipe 44 will cause the water to flow out to the outside, preventing the pressure inside the third supply pipe 43 and the third return pipe 44 from rising.

[0076] Therefore, when the pressurizing means 51 supplies water to the inside of the third supply pipe 43 and the third return pipe 44, if the pressure in the third supply pipe 43 and the third return pipe 44 does not rise above the reference pressure, it means that the multi-temperature controller B and the converter / distributor A cannot be accurately connected by the first and second supply pipes 21, 31 and the first and second return pipes 22, 32. In this case, the control means 50 activates the alarm means 53 to inform the operator.

[0077] The multi-adjustment system for the mold cooling structure configured in this way has the advantage of preventing the temperature of the upper and lower molds 1 and 2 from being accurately controlled. This is because if the first and second supply pipes 21 and 31 or the first and second return pipes 22 and 32 are not properly connected to the multi-temperature controller B and the converter / distributor A, the system detects this and activates an alarm means 53 to warn the operator. [Explanation of Symbols]

[0078] 1, 2: Upper and lower molds 4: Space 5: Connecting passage 10: Cooling core A: Converter / Distributor B: Multi-temperature controller

Claims

1. Cavities 3 are formed on adjacent surfaces, and in the lower molds 1 and 2, Inside the upper mold 1 or lower mold 2, a plurality of flow channels 11 and a plurality of connecting passages 5 connected to the flow channels 11 are formed. A conversion distributor A is connected to the connecting passage 5 via multiple first supply pipes 21 and a first return pipe 22, A multi-temperature controller B is connected to the conversion distributor A via a second supply pipe 31 and a second return pipe 32, The system further includes a control means 50 for controlling the operation of the conversion distributor A and the multi-temperature controller B, The multi-temperature controller B is used to supply water to the converter / distributor A with water adjusted to various temperatures, and the converter / distributor A is used to supply the water supplied by the multi-temperature controller B to different flow paths 11. The aforementioned converter / distributor A is Distribution case 23 and Multiple supply branch pipes 24 connecting the first supply pipe 21 and the second supply pipe 31, Multiple return branch pipes 25 connect the first return pipe and the second return pipe 32, The supply branch pipe 24 and the return branch pipe 25 are provided with on-off valves 26, The supply branch pipe 24 has a plurality of supply branch sections 24a formed at its front end, each connected to the first supply pipe 21, and its rear end is configured to be connected to one of the second supply pipes 31. The return branch pipe 25 has a plurality of return branch sections 25a formed at its front end, each connected to the first return pipe 22, and its rear end is configured to be connected to one of the second return pipes 32. The on / off valve 26 is provided in the supply branch section 24a and the return branch section 25a, and is configured to control the flow of water passing through the respective supply branch section 24a and return branch section 25a. A space 4 is formed inside the upper mold 1 or the lower mold 2. The space 4 is provided with a plurality of cooling cores 10, each having a flow channel 11 formed on its peripheral surface. Inside the upper mold 1 or lower mold 2, a connecting passage 5 is formed, one end of which is connected to the cooling core 10, and the other end of which extends to the outside of the upper and lower molds 1 and 2. A multi-adjustment system for a mold cooling structure, characterized by the following features.

2. The multi-temperature controller B is, Temperature control case 33, The temperature control case 33 includes a plurality of temperature control units 40 which are provided inside and connected to the second supply pipe 31 and the second return pipe 32, The second supply pipe 31 and the second return pipe 32 are connected to the rear ends of the supply branch pipe 24 and the return branch pipe 25, respectively. The temperature control unit 40 is Cold and hot water tanks 41 and 42, which store water inside, A third supply pipe 43 connects the aforementioned cold and hot water tanks 41 and 42 in parallel to the second supply pipe 31, A third return pipe 44 connects the aforementioned cold and hot water tanks 41 and 42 in parallel to the second return pipe 32, The water supply pump 45 provided in the third supply pipe 43, Includes a temperature control means 46 connected to the cold and hot water tanks 41 and 42, which adjusts the temperature of the water stored in the cold and hot water tanks 41 and 42. A multi-adjustment system for a mold cooling structure according to claim 1.

3. The temperature of the water stored in the chilled water tank 41 provided in the temperature control unit 40 is 0 to 120 degrees Celsius, and the temperature of the water stored in the hot water tank 42 provided in each temperature control unit 40 is 0 to 180 degrees Celsius. A multi-adjustment system for a mold cooling structure according to claim 2.

4. The cooling core 10 is composed of a rectangular block shape that extends in the vertical direction. The flow path 11 is Vertical grooves 11a are formed in a concave shape on both sides of the cooling core 10 so as to extend in the vertical direction, The cooling core 10 includes a connecting groove 11b formed in a concave shape on its upper or lower surface to connect the vertical groove 11a. A multi-adjustment system for a mold cooling structure according to claim 1.

5. The cooling core 10 provided in the space 4 is configured such that the direction of the connecting groove 11b intersects with that of another cooling core 10 that is in close contact with the side surface. A multi-adjustment system for a mold cooling structure according to claim 4.

6. The upper mold 1 is The upper mold body 1a has the cavity 3 formed on its lower side and the space 4 formed in a concave shape on its upper surface, It consists of an upper lid 1b which is coupled to the upper surface of the upper mold body 1a and seals the space 4, The lower mold 2 is A lower mold body 2a has a cavity 3 formed on its upper surface and the space 4 formed in a concave shape on its lower surface, It consists of a lower lid 2b which is coupled to the lower side surface of the lower mold body 2a and seals the space 4, The connecting passage 5 is formed so that one side is connected to the vertical groove 11a inside the upper lid 1b and the lower lid 2b, and the other side extends outside the upper lid 1b and the lower lid 2b. A multi-adjustment system for a mold cooling structure according to claim 4.

7. The space portion 4 is rectangular in shape, between the upper mold body 1a and the lower mold body 2a. The cooling core 10 is composed of a rectangular block shape extending in the vertical direction, and is designed to be installed in the space 4 by inserting multiple of them so that their sides are in close contact with each other. A multi-adjustment system for a mold cooling structure according to claim 6.

8. A pressurizing means 51 is connected to the third supply pipe 43 and the third return pipe 44 of the multi-temperature controller B and supplies high-pressure water to the third supply pipe 43 and the third return pipe 44, The third supply pipe 43 and the third return pipe 44 are equipped with a pressure sensor 52 that measures the pressure inside the third supply pipe 43 and the third return pipe 44, The system further includes an alarm means 53 connected to the control means 50, The control means 50 drives the pressurizing means 51 to supply high-pressure water to the third supply pipe 43 and the third return pipe 44, and while receiving the signal from the pressure sensor 52, if the pressure in the third supply pipe 43 and the third return pipe 44 does not rise to a preset reference pressure or higher, it determines that the connection state of the first and second supply pipes 21, 31 and the first and second return pipes 22, 32 is poor, and drives the alarm means 53 to notify the worker. A multi-adjustment system for a mold cooling structure according to claim 2.

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