A mold rapid cooling device for plastic product production

Abstract

The utility model discloses a mould quick cooling device for plastic product production belongs to mould injection technology field, including mounting seat, the surface of mounting seat one end is provided with sliding module, is installed to the injection mould close to sliding module one end, the other end on mounting seat is provided with the cooling mechanism that provides cooling cooling effect to injection mould, and mounting seat is as the support installation effect of overall structure, is made through high -strength steel material to install the sliding module containing linear guide rail and sliding block on mounting seat, can provide lifting movement to injection mould to can conveniently carry out injection moulding processing to plastic product, after plastic product injection moulding, through cooling mechanism delivery cooling water circulates in the flow channel and flows, thereby will plastic product produce the heat take away, has improved the speed of plastic product forming, and has guaranteed the stability of plastic product injection moulding, has prevented the deformation of plastic product, has guaranteed the quality of plastic product.

Description

Technical Field

[0001] This utility model relates to the field of mold injection technology, specifically a rapid cooling device for molds used in the production of plastic products. Background Technology

[0002] In the production of plastic products, injection molding is one of the most widely used technologies. The mold cooling stage is a key step in injection molding, and its efficiency directly affects the molding quality, production cycle and cost of the product.

[0003] According to announcement number CN220429407U, a rapid prototyping device for mold production is disclosed, relating to the field of production equipment technology. Specifically, the device includes a worktable with an A-mounting groove on its upper surface. An adjustment component is fixedly installed inside the A-mounting groove. A molding component is fixedly connected to one side of the upper surface of the worktable, and a cooling component is fixedly connected to the other side. This rapid prototyping device, through the molding and cooling components, allows raw materials to be placed into a lower mold. A cylinder is activated, which, via a push rod, moves the upper mold downwards to shape the mold. After shaping, a power motor is activated to move an adjustment plate to the other side until the lower mold is pushed into the cooling component. The mold is then cooled and ready for demolding, enabling rapid cooling and demolding, thus increasing production efficiency.

[0004] As described above, injection-molded products are cooled by moving them to a cooling assembly during the cooling process. However, during injection molding, the product needs to be shaped by pressing between the upper and lower molds. If the upper and lower molds are separated before the product is fully formed, and then the product is cooled, thermal expansion and contraction can easily occur, causing deformation and affecting the quality of the injection-molded product. This also reduces the efficiency of the cooling device in mold processing. To address these issues, an improved rapid cooling device for molds used in plastic product manufacturing has been proposed. Utility Model Content

[0005] The purpose of this invention is to provide a rapid cooling device for molds used in the production of plastic products. The cooling mechanism allows for cooling and lowering of the upper and lower molds during injection molding. Cooling water circulates within the flow channel, and the circulating water undergoes further cooling upon exiting the channel before being returned to the flow channel. This provides circulating cooling for the injection mold, enabling rapid cooling and molding of plastic products while preventing thermal expansion and contraction and deformation. Therefore, this improves the efficiency of the cooling device in injection mold processing, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a rapid cooling device for molds used in the production of plastic products, comprising a mounting base, a sliding module being provided on the surface of one end of the mounting base, an injection mold being mounted on the end near the sliding module, and a cooling mechanism being provided on the other end of the mounting base to provide cooling and temperature reduction for the injection mold.

[0007] Preferably, the injection mold includes an upper mold and a lower mold. A base is installed at the bottom of the lower mold, and hydraulic cylinders that cooperate with the lower mold are installed on both sides of the base. Flow channels are opened around the cavity of the lower mold, and a seal is installed at the upper port of the flow channel. One end of the cooling mechanism is connected to the inner cavity of the flow channel.

[0008] Preferably, the sealing element includes a sealing plate and a silicone strip. The silicone strip is installed around the lower surface of the sealing plate. The sealing plate is located above the flow channel. The sealing plate has protrusions with mounting holes integrally formed around its perimeter. The surface of the upper mold has grooves corresponding to the protrusions. The protrusions are installed in the grooves and fixedly connected by fasteners. The upper end of the fasteners is located in the mounting holes and fitted with a protective sleeve. The position of the protective sleeve is level with the surface of the protrusions.

[0009] Preferably, the cooling mechanism includes a water chiller and a circulating pump. Both the water chiller and the circulating pump are mounted on a mounting base. A conduit connects the water chiller and the circulating pump. A return pipe is connected to the top of the water chiller. A liquid guide pipe is connected to the outlet of the circulating pump. A guide pipe is installed at the end of the return pipe and the liquid guide pipe near the lower mold. One end of the guide pipe is embedded in the lower mold and connected to the flow channel.

[0010] Preferably, a branch pipe is connected between the conduit and the water chiller, a first switching valve is installed at the connection between the branch pipe and the conduit, a second switching valve is installed at one end of the conduit near the circulating pump, a first temperature detector is installed at the other end of the conduit to cooperate with the first and second switching valves, and a second temperature detector is installed on the guide pipe of the return pipe.

[0011] Preferably, positioning rods are fixedly connected around the lower surface of the upper mold, and positioning holes are fixedly connected to the surface of the lower mold at positions corresponding to the positioning rods.

[0012] Preferably, the guide tube includes a fixed end and a movable end, the fixed end is embedded in the lower mold, and the outer end of the fixed end is threadedly connected to the movable end.

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

[0014] This utility model provides a rapid cooling device for molds used in the production of plastic products. The cooling mechanism cools the upper and lower molds during injection molding, allowing cooling water to circulate within the flow channel. The circulating cooling water undergoes further cooling upon exiting the flow channel, and is then returned to the flow channel. This provides circulating cooling for the injection mold, enabling rapid cooling and molding of plastic products while preventing thermal expansion and contraction and deformation. Therefore, it improves the efficiency of the cooling device in the injection mold process.

[0015] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is an exploded view of the lower mold and sealing component structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the flow guide tube structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the sealing plate structure of this utility model.

[0020] The following are the labeling elements in the diagram: 1. Mounting base; 2. Sliding module; 3. Injection mold; 31. Upper mold; 32. Lower mold; 33. Base; 34. Hydraulic cylinder; 35. Flow channel; 36. Seal; 361. Sealing plate; 362. Silicone strip; 363. Protrusion; 364. Groove; 365. Fastener; 366. Protective sleeve; 4. Cooling mechanism; 41. Water chiller; 42. Circulating pump; 43. Conduit; 44. Return pipe; 45. Liquid guide pipe; 46. Flow guide pipe; 461. Fixed end; 462. Moving end; 47. Branch pipe; 48. First switching valve; 49. Second switching valve; 410. First temperature detector; 411. Second temperature detector; 5. Positioning rod; 6. Positioning hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] This utility model provides, for example Figures 1-4 The device shown is a rapid cooling device for molds used in the production of plastic products. It includes a mounting base 1, a sliding module 2 is provided on the surface of one end of the mounting base 1, and an injection mold 3 is mounted on the end near the sliding module 2. The other end of the mounting base 1 is provided with a cooling mechanism 4 to provide cooling for the injection mold 3. The mounting base 1, made of high-strength steel, serves as a support for the overall structure. The sliding module 2, which includes a linear guide rail and a slider, is mounted on the mounting base 1, enabling the injection mold 3 to move up and down, thus facilitating the injection molding of plastic products. After the plastic product is injection molded, cooling water is transported by the cooling mechanism 4 and circulates in the flow channel 35, thereby removing the heat generated by the plastic product, improving the molding speed of the plastic product, ensuring the stability of the injection molding, preventing deformation of the plastic product, and guaranteeing the quality of the plastic product.

[0023] Injection mold 3 includes an upper mold 31 and a lower mold 32. A base 33 is installed at the bottom of the lower mold 32. Hydraulic cylinders 34 that cooperate with the lower mold 32 are installed on both sides of the base 33. Runners 35 are opened around the cavity of the lower mold 32. A seal 36 is installed at the upper end of the runners 35. One end of the cooling mechanism 4 is connected to the inner cavity of the runners 35. During injection molding, the upper mold 31 and the lower mold 32 can be driven to fit together through the sliding mold assembly. The injection material is injected into the mold cavity through the runners 35 to complete the injection molding. After the plastic product is cooled and formed, the hydraulic cylinders 34 are used to drive the lower mold 32 to move, which can demold the cooled and formed plastic product.

[0024] The sealing element 36 includes a sealing plate 361 and a silicone strip 362. The silicone strip 362 is installed around the lower surface of the sealing plate 361. The sealing plate 361 is located above the flow channel 35. The sealing plate 361 has integrally formed protrusions 363 with mounting holes around its perimeter. The surface of the upper mold 31 has grooves 364 at positions corresponding to the protrusions 363. The protrusions 363 are installed in the grooves 364 and fixedly connected by fasteners 365. The upper end of the fasteners 365 is located in the mounting hole and is fitted with a protective sleeve 366. The protective sleeve 366 is positioned horizontally with the surface of the protrusion 363. The sealing plate 361 is fixed in the groove 364 by the cooperation of the fastener 365 and the protrusion 363. The silicone strip 362 is deformed under pressure to fill the gap at the connection between the flow channel 35 and the sealing plate 361, which can prevent cooling water from flowing out of the flow channel 35, thus avoiding waste of cooling water and mold contamination. The fastener 365 can be a hex bolt, and the protective sleeve 366 is fitted on the hex bolt to prevent it from being damaged by external forces and corrosion.

[0025] Cooling mechanism 4 includes a water chiller 41 and a circulating pump 42. Both the water chiller 41 and the circulating pump 42 are mounted on the mounting base 1. A conduit 43 connects the water chiller 41 and the circulating pump 42. A return pipe 44 is connected to the top of the water chiller 41, and a liquid guide pipe 45 is connected to the outlet of the circulating pump 42. A guide pipe 46 is installed at one end of the return pipe 44 and the liquid guide pipe 45 near the lower mold 32. One end of the guide pipe 46 is embedded in the lower mold 32 and connected to the flow channel 35. The working principle of the water chiller 41 is through refrigeration circulation (pressure) The compressor, condenser, evaporator, etc. transfer heat from the cooling water to cool it down. Then, the circulating pump 42 injects the cooling water into the flow channel 35 through the liquid guide pipe 45 and the flow guide pipe 46 to cool the injection mold 3. The liquid that has absorbed heat returns to the water chiller 41 through the return pipe 44 to cool down, forming a closed loop. This cycle is repeated to provide a cooling effect to the injection mold 3, enabling the plastic product to be molded quickly and preventing deformation of the plastic product during the cooling and molding process.

[0026] A branch pipe 47 connects the conduit 43 to the water chiller 41. A first switching valve 48 is installed at the connection between the branch pipe 47 and the conduit 43. A second switching valve 49 is installed at one end of the conduit 43 near the circulating pump 42. A first temperature detector 410, which works in conjunction with the first switching valve 48 and the second switching valve 49, is installed at the other end of the conduit 43. A second temperature detector 411 is installed on the guide pipe 46 connecting to the return pipe 44. The first temperature detector 410 and the second temperature detector 411 are platinum resistance temperature sensors, which are most commonly used in the injection molding industry. They are then connected to the first switching valve 48 and the second... The switching valves 49 work together. When the cooling water temperature is detected by the first temperature detector 410 as not reaching the appropriate temperature, the first switching valve 48 is opened and the second switching valve 49 is closed. The cooled water is then pumped into the flow channel 35 by the circulating pump 42. Similarly, when the cooling water reaches the appropriate temperature, the second switching valve 49 is opened and the first switching valve 48 is closed. The water then flows back to the water chiller 41 through the branch pipe 47 for cooling. At the same time, the second temperature detector 411 will detect the temperature of the cooling water flowing out of the flow channel 35, which will facilitate the operator to control the cooling time of the injection mold 3.

[0027] Positioning rods 5 are fixedly connected around the lower surface of the upper mold 31. Positioning holes 6 are fixedly connected to the surface of the lower mold 32 at positions corresponding to the positioning rods 5. Through the cooperation of the positioning rods 5 and the positioning holes 6, the positioning rods 5 can be inserted into the positioning holes 6 when the upper mold 31 and the lower mold 32 are closed, preventing the injection mold 3 from shifting.

[0028] The guide tube 46 includes a fixed end 461 and a movable end 462. The fixed end 461 is embedded in the lower mold 32, and the outer end of the fixed end 461 is threadedly connected to the movable end 462. The fixed end 461 is firmly embedded in the lower mold 32 to ensure that the coolant can flow steadily into the flow channel 35. The movable end 462 is connected to the fixed end 461 by threads, which is convenient for disassembly and installation. When it is necessary to maintain the cooling system or replace parts, the movable end 462 can be easily disassembled for operation.

[0029] In practical use, when injection molding plastic products, the slider in the sliding module 2 first slides on the slide rail. Then, the positioning rod 5 on the lower surface of the upper mold 31 is precisely inserted into the positioning hole 6 of the lower mold 32 to achieve precise mold alignment and closure. Then, the plastic product is injection molded. After molding, the cooling mechanism 4 starts working. The circulating pump 42 starts, and the coolant in the water chiller 41, after being cooled by the refrigeration cycle, is transported to the flow channel 35 of the lower mold 32 through the conduit 43, the liquid guide pipe 45, and the flow guide pipe 46. During this process, the first temperature detector 410 monitors the temperature of the coolant before it enters the mold. If the temperature is not suitable, the first switch valve 48 is opened and the second switch valve 49 is closed, and the coolant is directly transported to the flow channel 35. When the temperature is suitable, the first switch valve 48 is closed and the second switch valve 49 is opened, and the coolant flows back to the water chiller 41 through the branch pipe 47. At the same time, the second temperature detector 411 detects the temperature of the coolant flowing out of the flow channel 35 to help the operator control the cooling time. After absorbing heat from the mold in the flow channel 35, the coolant flows back to the water chiller 41 through the return pipe 44 to cool down, forming a circulation. This quickly removes heat from the plastic product, accelerates its molding, and prevents deformation. After the plastic product cools and is molded, the hydraulic cylinder 34 drives the lower mold 32 to move downwards. Then, the ejector pins set at the bottom of the lower mold 32 on the base 33 can eject the plastic product, thereby completing the demolding process.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid cooling device for molds used in the production of plastic products, comprising a mounting base (1), characterized in that: A sliding module (2) is provided on one end of the mounting base (1), and an injection mold (3) is installed at one end near the sliding module (2). A cooling mechanism (4) is provided on the other end of the mounting base (1) to provide cooling and temperature reduction for the injection mold (3).

2. The rapid cooling device for molds used in the production of plastic products according to claim 1, characterized in that: The injection mold (3) includes an upper mold (31) and a lower mold (32). A base (33) is installed at the bottom of the lower mold (32). Hydraulic cylinders (34) that cooperate with the lower mold (32) are installed on both sides of the base (33). A flow channel (35) is opened around the cavity of the lower mold (32). A seal (36) is installed at the upper port of the flow channel (35). One end of the cooling mechanism (4) is connected to the inner cavity of the flow channel (35).

3. The rapid cooling device for molds used in the production of plastic products according to claim 2, characterized in that: The sealing element (36) includes a sealing plate (361) and a silicone strip (362). The silicone strip (362) is installed around the lower surface of the sealing plate (361). The sealing plate (361) is located above the flow channel (35). The sealing plate (361) has a protrusion (363) with mounting holes integrally formed around its perimeter. The upper mold (31) has a groove (364) at the position corresponding to the protrusion (363). The protrusion (363) is installed in the groove (364) and fixedly connected by a fastener (365). The upper end of the fastener (365) is located in the mounting hole and is fitted with a protective sleeve (366). The position of the protective sleeve (366) is level with the surface of the protrusion (363).

4. The rapid cooling device for molds used in the production of plastic products according to claim 3, characterized in that: The cooling mechanism (4) includes a water chiller (41) and a circulating pump (42). Both the water chiller (41) and the circulating pump (42) are mounted on the mounting base (1). A conduit (43) connects the water chiller (41) and the circulating pump (42). A return pipe (44) is connected to the top of the water chiller (41). A liquid guide pipe (45) is connected to the outlet of the circulating pump (42). A guide pipe (46) is installed at one end of the return pipe (44) and the guide pipe (45) near the lower mold (32). One end of the guide pipe (46) is embedded in the lower mold (32) and connected to the position of the flow channel (35).

5. The rapid cooling device for molds used in the production of plastic products according to claim 4, characterized in that: A branch pipe (47) is connected between the conduit (43) and the water chiller (41). A first switching valve (48) is installed at the connection between the branch pipe (47) and the conduit (43). A second switching valve (49) is installed at one end of the conduit (43) near the circulating pump (42). A first temperature detector (410) is installed at the other end of the conduit (43) to cooperate with the first switching valve (48) and the second switching valve (49). A second temperature detector (411) is installed on the guide pipe (46) of the return pipe (44).

6. The rapid cooling device for molds used in the production of plastic products according to claim 2, characterized in that: Positioning rods (5) are fixedly connected around the lower surface of the upper mold (31), and positioning holes (6) are fixedly connected to the surface of the lower mold (32) at positions corresponding to the positioning rods (5).

7. The rapid cooling device for molds used in the production of plastic products according to claim 4, characterized in that: The guide tube (46) includes a fixed end (461) and a movable end (462). The fixed end (461) is embedded in the lower mold (32), and the outer end of the fixed end (461) is threadedly connected to the movable end (462).

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