Plastic product forming device

Abstract

The plastic product forming device comprises a first mounting plate, a second mounting plate, a female die, a male die, a cooling mechanism, a driving mechanism and a material returning mechanism, four guide columns are fixedly connected between the first mounting plate and the second mounting plate, the female die is fixedly mounted at the ends, close to the first mounting plate, of the guide columns, and a guide hole is formed in the male die; plastic products in the forming cavity can be rapidly cooled through the arranged cooling mechanism, the cooling efficiency of the plastic products is effectively improved, the automatic material returning function can be achieved through the arranged material returning mechanism after the male die completely retreats from the female die, the material returning efficiency is improved, and the material returning efficiency is improved. According to the injection mold, the phenomenon that a plastic product abuts against the male mold by the material returning mechanism is effectively avoided, after mold closing, the material returning mechanism cannot burst the plastic product which is not completely solidified in the forming cavity, the yield is improved, mold closing operation of the cooling mechanism, the material returning mechanism, the female mold and the male mold is driven by the driving mechanism, and energy consumption is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of plastic molding, in particular to a plastic product molding device. Background Art

[0002] Plastic lunch boxes are plastic containers made of food-grade plastic raw materials for the purpose of taking food out. They are a very common household plastic product in daily life and an indispensable plastic container for picnics or hikes.

[0003] A Chinese patent with announcement number CN118024490B discloses a plastic lunch box forming device, including a base, a punch assembly, a first drive assembly, a horizontal push assembly and a top support assembly. A mold cavity is opened at the center of the upper part of the base, and a top plate is fixedly provided at the upper edge of the base by a number of columns. The punch assembly is arranged above the mold cavity, and the first drive assembly is installed at the bottom of the top plate to drive the punch assembly to move up and down. The top support assembly is arranged inside the mold cavity.

[0004] The above-mentioned molding device can realize automatic molding of plastic lunch boxes, and can also realize automatic demoulding of plastic lunch boxes and automatically remove the demoulded plastic lunch boxes from between the male mold assembly and the mold cavity. The molding process of the plastic lunch boxes does not require excessive human intervention, thereby improving the molding efficiency of the plastic lunch boxes and improving the safety of the plastic lunch boxes during the molding process.

[0005] However, in actual use, there are still some defects. For example, after the injection molding is completed, it does not have the function of quickly cooling the plastic lunch box formed in the mold cavity, and the efficiency is low. In addition, the plastic lunch box in the mold cavity is returned by a top support block, a top support rod and an elastic member. After the injection molding is completed and the plastic is completely solidified, the top support rod may break the plastic lunch box that has not been completely solidified under the push of the elastic member, causing the molded plastic lunch box to be a defective product.

[0006] Therefore, a plastic product forming device is proposed. Summary of the invention

[0007] An object of the present invention is to provide a plastic product forming device, so as to solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the prior art.

[0008] To achieve the above object, the present invention provides the following technical solution: a plastic product forming device, comprising:

[0009] A first mounting plate and a second mounting plate, wherein four guide pillars are fixedly connected between the first mounting plate and the second mounting plate;

[0010] A concave die and a convex die, wherein the concave die is fixedly mounted on one end of the guide post close to the first mounting plate, and a guide hole is provided on the convex die, and the convex die is slidably mounted on the guide post through the guide hole;

[0011] A driving mechanism, the driving mechanism is used to drive the male mold to perform mold closing or mold opening operations;

[0012] A cooling mechanism, the cooling mechanism is used to cool the plastic product in the molding cavity surrounded by the female mold and the male mold after the mold is closed;

[0013] The material ejection mechanism is used to eject the plastic product formed in the die after cooling from the die.

[0014] In a plastic product forming device according to the present invention, optionally, the driving mechanism includes an electric cylinder and two sleeves, the electric cylinder is fixedly mounted on one side of the second mounting plate, one end of the two sleeves are fixedly connected to the side of the punch away from the die, the piston rod end of the electric cylinder is fixedly connected to a connecting plate, the interiors of the two sleeves are slidably connected to sliding blocks, one side of the sliding blocks is fixedly connected to a movable rod, the end of the movable rod away from the sliding block slides through one end of the sleeve and is fixedly connected to the connecting plate, a second spring is arranged inside the sleeve, one end of the second spring abuts against one side of the punch, and the other end of the second spring abuts against one side of the sliding block.

[0015] In a plastic product forming device according to the present invention, optionally, the cooling mechanism comprises a cooling component, a cold source component and a pressure component;

[0016] A cooling cavity is provided inside the concave mold, and the cooling component is arranged inside the concave mold. The cooling component is used to exchange heat with the cooling cavity, thereby cooling the plastic product in the molding cavity formed by the concave mold and the convex mold.

[0017] The cold source component is provided with a coolant, and the cold source component is connected to the lower end of the cooling component;

[0018] When the plastic product in the molding cavity needs to be cooled, the pressure component can draw the cooling liquid in the cold source component into the cooling component. When injection molding is required, the pressure component presses the cooling liquid in the cooling component back into the cold source component.

[0019] In a plastic product forming device according to the present invention, optionally, the cooling assembly includes a cooling pipe, and a plurality of cooling pipes are provided, and the plurality of cooling pipes are all arranged in the cooling cavity;

[0020] The cold source assembly includes a box body, the box body is fixedly connected to the lower end of one side of the first mounting plate, a semiconductor refrigeration sheet is fixedly embedded in the bottom of the box body, the cooling surface of the semiconductor refrigeration sheet is arranged inside the box body, the heating surface of the semiconductor refrigeration sheet is arranged outside the box body, and the lower end of the cooling pipe is connected to the lower end of the box body;

[0021] The pressure assembly includes a pressure box, which is fixedly mounted on an upper end of one side of the first mounting plate, a piston is slidably arranged inside the pressure box, one side of the piston is fixedly connected to a rod body, an end of the rod body away from the piston slides through one side of the pressure box and is fixedly connected to a second stopper, a third spring is sleeved on the rod body, one end of the third spring abuts against one side of the second stopper, and the other end of the third spring abuts against one side of the pressure box, a cross tube is fixedly connected to the bottom of the pressure box, the cross tube is connected to the interior of one end of the pressure box close to the first mounting plate, and the upper end of the cooling tube is connected to the cross tube.

[0022] In a plastic product forming device according to the present invention, optionally, a plurality of heat-conducting fins are fixedly connected to the cooling pipe, and the heat-conducting fins are in contact with the interior of the cooling cavity.

[0023] In a plastic product forming device according to the present invention, optionally, a heat conducting plate is provided inside the box body, and the cooling surface of the semiconductor refrigeration plate is in contact with the bottom of the heat conducting plate.

[0024] In a plastic product forming device according to the present invention, optionally, a push rod is fixedly connected to the sliding block, the upper end of the push rod can squeeze the second stopper, and a strip slide groove is opened on the sleeve, and the lower end of the push rod is slidably arranged in the strip slide groove.

[0025] In a plastic product molding device according to the present invention, optionally, the material stripping mechanism comprises a material stripping plate, a sliding rod, a cross beam and an insertion rod, the inner side of the female mold is provided with a groove, the material stripping plate is arranged in the groove, the female mold is provided with a through hole connected to the groove, the sliding rod is slidably inserted in the through hole, one end of the sliding rod is fixedly connected to one side of the material stripping plate, the other end of the sliding rod is fixedly connected to the cross beam, the insertion rod is fixedly connected to the end of the cross beam, the female mold is provided with an insertion hole, the end of the insertion rod away from the cross beam is slidably inserted in the insertion hole, the end of the insertion rod away from the cross beam is embedded with a second magnet block, the insertion rod is sleeved with a fourth spring, one end of the fourth spring is against one side of the cross beam, and the other end of the fourth spring is against one side of the female mold;

[0026] The punch is provided with a first slide groove and a second slide groove, the first slide groove and the second slide groove are connected, a pressure rod is slidably arranged in the second slide groove, one end of the pressure rod extends out of the second slide groove, one end of the pressure rod close to the first slide groove is fixedly connected to a connecting rod, and the end of the connecting rod away from the second slide groove slides and extends into the interior of the first slide groove, and the end of the connecting rod away from the pressure rod is fixedly connected to a first stopper, the first stopper is slidably arranged in the first slide groove, and the end of the second slide groove away from the connecting rod is embedded with a first magnet block, the pressure rod can extend into the jack, and the first magnet block and the second magnet block can be magnetically attracted; the magnetic force between the first magnet block and the second magnet block is greater than the elastic force of the fourth spring when the compression degree of the fourth spring is maximum.

[0027] In a plastic product forming device according to the present invention, optionally, a first spring is sleeved on the connecting rod, one end of the first spring abuts against one side of the first stopper, the other end of the first spring abuts against one side of the first slide groove, and the stiffness coefficient of the first spring is smaller than the stiffness coefficient of the fourth spring.

[0028] In a plastic product forming device according to the present invention, optionally, the operation process of the plastic product forming device specifically includes the following steps:

[0029] S1, mold closing, controlling the piston rod of the electric cylinder to extend, so that the connecting plate drives the movable rod to move toward the direction of the female mold, so that the sliding block pushes the second spring to move toward the direction of the female mold, and then the second spring pushes the punch to move toward the direction of the female mold, so that the female mold and the punch are closed;

[0030] S2, squeeze out the coolant, continue to control the piston rod of the electric cylinder to extend, so that the second spring is gradually compressed, and at the same time the push rod squeezes the second stopper, so that the piston moves toward the first mounting plate, and then the coolant in the cooling pipe is hydraulically returned to the box body. At this time, there is a stable mold clamping pressure between the die and the punch, and the third spring is in a compressed state. At this time, the semiconductor refrigeration sheet is controlled to start and cool the coolant in the box body;

[0031] S3, injection molding, adding liquid material into the injection port of the male mold so that the liquid material enters the molding cavity for molding;

[0032] S4, cooling, at this time, the piston rod of the control electric cylinder is retracted for a distance, so that the push rod releases the squeezing of the second stopper, and at the same time, the second spring is still in a compressed state, so that the male mold and the female mold are still in a mold closing state. At this time, the piston moves away from the first mounting plate under the elastic force of the third spring, and then the coolant inside the box is sucked into the cooling pipe to cool the plastic product in the molding cavity;

[0033] S5, material withdrawal, control the piston rod of the electric cylinder to retract, and then drive the sliding block to move in the direction away from the die, so that the sliding block pushes the sleeve to move in the direction away from the die, and then the punch moves in the direction away from the die. As the punch continues to move in the direction away from the die, the pressure rod is still connected to the insertion rod under the magnetic attraction of the second magnet block and the first magnet block, but as the punch continues to move, the first stop block moves into the interior of the first slide groove, and the first spring is continuously compressed. When the first spring is at the maximum compression, the punch is completely pulled out of the die. At this time, the punch continues to move backward. Because the magnetic force between the second magnet block and the first magnet block is greater than the elastic force of the fourth spring when the compression degree is the maximum, the insertion rod drives the material stripping plate to move in the direction of the second mounting plate, and then the material stripping plate pushes out the plastic product in the die. When the piston rod of the electric cylinder retracts to the maximum, the second magnet block is separated from the first magnet block, and the material stripping plate is reset to the groove under the elastic force of the fourth spring, and the pressure rod is also reset under the elastic force of the first spring.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The present invention can quickly cool the plastic product in the molding cavity by means of the cooling mechanism, thereby effectively improving the cooling efficiency of the plastic product; the material return mechanism can realize the automatic material return function after the punch completely exits the die, thereby effectively preventing the plastic product from being pressed against the punch by the material return mechanism; and after the mold is closed, the material return mechanism will not break the plastic product that is not completely solidified in the molding cavity, thereby improving the yield rate; the cooling mechanism, the material return mechanism, and the mold closing operation of the die and the punch are all driven by the driving mechanism, thereby effectively reducing energy consumption and manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of a plastic product forming device of the present invention;

[0037] Figure 2 It is a structural schematic diagram of a plastic product forming device of the present invention from another perspective;

[0038] Figure 3 It is a structural schematic diagram of a concave mold in a plastic product molding device of the present invention;

[0039] Figure 4 It is a schematic cross-sectional structure diagram of a concave mold in a plastic product molding device of the present invention;

[0040] Figure 5 It is a schematic cross-sectional structure diagram of a male mold in a plastic product molding device of the present invention;

[0041] Figure 6 It is a schematic cross-sectional structure diagram of a male mold and a female mold in a plastic product molding device of the present invention when the male mold and the female mold are molded together;

[0042] Figure 7 It is a schematic cross-sectional structure diagram of a plastic product forming device of the present invention;

[0043] Figure 8 It is a structural schematic diagram of a cooling component in a plastic product forming device of the present invention;

[0044] Fig. 9 The present invention is a schematic diagram of the structure of a semiconductor cooling plate and a heat conducting plate in a plastic product molding device.

[0045] In the figure: 1, first mounting plate; 101, guide column; 2, second mounting plate;

[0046] 3. Concave mold; 301. Groove; 302. Through hole; 303. Cooling cavity; 304. Socket;

[0047] 4. Punch; 4011. Guide hole; 401. First slide groove; 402. Second slide groove; 403. Press rod; 404. Connecting rod; 405. First stopper; 406. First magnet block; 407. First spring;

[0048] 5. Driving mechanism; 501. Electric cylinder; 502. Connecting plate; 503. Sleeve; 5031. Strip slide; 504. Movable rod; 505. Sliding block; 506. Second spring;

[0049] 6. Cooling assembly; 601. Cooling pipe; 602. Heat conducting fins;

[0050] 7. Cold source assembly; 701. Box; 702. Semiconductor cooling sheet; 703. Heat conducting plate;

[0051] 8. Pressure assembly; 801. Pressure box; 802. Rod body; 803. Second stopper; 804. Third spring; 805. Piston; 806. Cross tube; 807. Push rod;

[0052] 9. Material return mechanism; 901. Material return plate; 902. Sliding rod; 903. Crossbeam; 904. Insert rod; 905. Fourth spring; 906. Second magnet block. DETAILED DESCRIPTION

[0053] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0054] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0055] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0056] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] Example

[0058] See also Figures 1 to 9 The present embodiment provides the following technical solutions: a plastic product molding device, comprising a first mounting plate 1, a second mounting plate 2, a die 3, a punch 4, a cooling mechanism, a driving mechanism 5 and a material ejection mechanism 9, four guide pillars 101 are fixedly connected between the first mounting plate 1 and the second mounting plate 2, the die 3 is fixedly mounted on one end of the guide pillar 101 close to the first mounting plate 1, a guide hole 4011 is provided on the punch 4, and the punch 4 is slidably arranged on the guide pillar 101 through the guide hole 4011, the driving mechanism 5 is used to drive the punch 4 to perform mold closing or mold opening operations, the cooling mechanism is used to cool the plastic product in the molding cavity surrounded by the die 3 and the punch 4 after the die is closed, and the material ejection mechanism 9 is used to push the plastic product formed in the die 3 after cooling from the die 3.

[0059] It should be noted that the male mold 4 is provided with an injection port.

[0060] In this embodiment, the driving mechanism 5 includes an electric cylinder 501 and two sleeves 503. The electric cylinder 501 is fixedly mounted on one side of the second mounting plate 2. One ends of the two sleeves 503 are fixedly connected to the side of the punch 4 away from the die 3. The piston rod end of the electric cylinder 501 is fixedly connected to the connecting plate 502. The interiors of the two sleeves 503 are slidably connected to sliding blocks 505. One side of the sliding blocks 505 is fixedly connected to a movable rod 504. The end of the movable rod 504 away from the sliding block 505 slides through one end of the sleeve 503 and is fixedly connected to the connecting plate 502. A second spring 506 is arranged inside the sleeve 503. One end of the second spring 506 abuts against one side of the punch 4, and the other end of the second spring 506 abuts against one side of the sliding block 505.

[0061] When in use, by controlling the piston rod of the electric cylinder 501 to extend, the connecting plate 502 drives the movable rod 504 to move in the direction of the die 3, so that the sliding block 505 pushes the second spring 506 to move in the direction of the die 3, and then the second spring 506 pushes the punch 4 to move in the direction of the die 3, so that the die 3 and the punch 4 are closed.

[0062] When opening the mold, the piston rod of the control electric cylinder 501 is retracted, thereby driving the sliding block 505 to move away from the die 3, so that the sliding block 505 pushes the sleeve 503 to move away from the die 3, and then the punch 4 moves away from the die 3, so that the mold opening operation is performed.

[0063] In this embodiment, the cooling mechanism includes a cooling component 6, a cold source component 7 and a pressure component 8;

[0064] A cooling cavity 303 is provided inside the concave mold 3, and a cooling assembly 6 is arranged inside the concave mold 3. The cooling assembly 6 is used to exchange heat with the cooling cavity 303, thereby cooling the plastic product in the molding cavity formed by the concave mold 3 and the convex mold 4 after the mold is closed.

[0065] A cooling liquid is arranged in the cold source component 7, and the cold source component 7 is connected to the lower end of the cooling component 6;

[0066] The cooling assembly 6 includes a cooling tube 601, and a plurality of cooling tubes 601 are provided. The plurality of cooling tubes 601 are all provided in the cooling cavity 303. In order to improve the heat exchange efficiency, a plurality of heat conducting fins 602 are fixedly connected to the cooling tube 601, and the heat conducting fins 602 are in contact with the interior of the cooling cavity 303.

[0067] The cold source assembly 7 includes a box body 701, which is fixedly connected to the lower end of one side of the first mounting plate 1. A semiconductor refrigeration sheet 702 is fixedly embedded at the bottom of the box body 701. The cooling surface of the semiconductor refrigeration sheet 702 is arranged inside the box body 701, and the heating surface of the semiconductor refrigeration sheet 702 is arranged outside the box body 701. The lower end of the cooling pipe 601 is connected to the lower end of the box body 701. In order to improve the heat exchange efficiency, a heat conduction plate 703 is arranged inside the box body 701, and the cooling surface of the semiconductor refrigeration sheet 702 is in contact with the bottom of the heat conduction plate 703.

[0068] The cooling liquid inside the box 701 can be quickly cooled by the semiconductor cooling plate 702 .

[0069] When the coolant flows in the cooling pipe 601, it will exchange heat with the plastic product in the molding cavity. The temperature change of the coolant needs to be calculated to ensure the cooling effect of the plastic product. For this purpose, the heat transfer equation of the coolant temperature change is proposed:

[0070]

[0071] Where:

[0072] ΔT: temperature change of the coolant; Q: flow rate of the coolant; L: length of the cooling pipe 601;

[0073] T in : The temperature of the coolant when it enters the cooling pipe 601; T out : The temperature of the coolant when it flows out of the cooling pipe 601; m: The mass of the coolant; Cp: The specific heat capacity of the coolant.

[0074] The above equation can be used to accurately calculate the temperature change of the coolant, ensuring that the temperature change of the coolant is within a reasonable range and avoiding the cooling effect caused by too high or too low temperature. By adjusting the flow rate and temperature of the coolant, the cooling speed of the plastic product can be accurately controlled, which can not only increase the molding speed of the plastic product, but also ensure the successful quality of the plastic product.

[0075] Among them, the pressure assembly 8 includes a pressure box 801, which is fixedly installed on the upper end of one side of the first mounting plate 1. A piston 805 is slidably arranged inside the pressure box 801, and one side of the piston 805 is fixedly connected to a rod body 802. The end of the rod body 802 away from the piston 805 slides through one side of the pressure box 801 and is fixedly connected to a second stopper 803. A third spring 804 is sleeved on the rod body 802, and one end of the third spring 804 abuts against one side of the second stopper 803, and the other end of the third spring 804 abuts against one side of the pressure box 801. A cross tube 806 is fixedly connected to the bottom of the pressure box 801, and the cross tube 806 is connected to the inside of one end of the pressure box 801 close to the first mounting plate 1, and the upper end of the cooling tube 601 is connected to the cross tube 806.

[0076] Among them, a push rod 807 is fixedly connected to the sliding block 505, and the upper end of the push rod 807 can squeeze the second stopper 803. A strip slide groove 5031 is opened on the sleeve 503, and the lower end of the push rod 807 is slidably set in the strip slide groove 5031.

[0077] Among them, when it is necessary to cool the plastic product in the molding cavity, the pressure component 8 can suck the cooling liquid in the cold source component 7 into the cooling component 6. When injection molding is required, the pressure component 8 presses the cooling liquid in the cooling component 6 back to the cold source component 7 to ensure that the injection molding liquid can stably flow and form in the molding cavity.

[0078] When in use, the piston rod of the electric cylinder 501 is controlled to extend, thereby gradually compressing the second spring 506, and at the same time, the push rod 807 squeezes the second stopper 803, so that the piston 805 moves toward the first mounting plate 1, and then the cooling fluid in the cooling pipe 601 is hydraulically returned to the box body 701. At this time, there is a stable mold clamping pressure between the concave mold 3 and the convex mold 4, and at the same time, the third spring 804 is in a compressed state. At this time, the semiconductor refrigeration sheet 702 is controlled to start, and the coolant in the box body 701 is cooled;

[0079] When the plastic product in the molding cavity needs to be cooled, the piston rod of the control cylinder 501 is retracted for a distance, so that the push rod 807 releases the squeezing of the second stopper 803. At the same time, the second spring 506 is still in a compressed state, so that the punch 4 and the die 3 are still in a mold closing state. At this time, the piston 805 moves away from the first mounting plate 1 under the elastic force of the third spring 804, and the coolant inside the box 701 is sucked into the cooling pipe 601 to cool the plastic product in the molding cavity.

[0080] In this embodiment, the material stripping mechanism 9 includes a material stripping plate 901, a sliding rod 902, a cross beam 903 and an insertion rod 904. A groove 301 is provided on the inner side of the die 3. The material stripping plate 901 is arranged in the groove 301. A through hole 302 connected to the groove 301 is provided on the die 3. The sliding rod 902 is slidably inserted in the through hole 302. One end of the sliding rod 902 is fixedly connected to one side of the material stripping plate 901, and the other end of the sliding rod 902 is fixedly connected to the cross beam 903 and the insertion rod 904. 03 is fixedly connected, the plug rod 904 is fixedly connected to the end of the beam 903, the die 3 is provided with a plug hole 304, the end of the plug rod 904 away from the beam 903 is slidably plugged into the plug hole 304, the end of the plug rod 904 away from the beam 903 is embedded with a second magnet block 906, the plug rod 904 is sleeved with a fourth spring 905, one end of the fourth spring 905 is against one side of the beam 903, and the other end of the fourth spring 905 is against one side of the die 3;

[0081] The punch 4 is provided with a first slide groove 401 and a second slide groove 402, the first slide groove 401 and the second slide groove 402 are connected, a pressure rod 403 is slidably arranged in the second slide groove 402, one end of the pressure rod 403 extends out of the second slide groove 402, one end of the pressure rod 403 close to the first slide groove 401 is fixedly connected with a connecting rod 404, one end of the connecting rod 404 away from the second slide groove 402 slides and extends into the interior of the first slide groove 401, and one end of the connecting rod 404 away from the pressure rod 403 is fixedly connected with a first stopper 405, the first stopper 405 is slidably arranged in the first slide groove 401, and one end of the second slide groove 402 away from the connecting rod 404 is embedded with a first magnet block 406, the pressure rod 403 can extend into the insertion hole 304, and the first magnet block 406 and the second magnet block 906 can be magnetically attracted; the magnetic force between the first magnet block 406 and the second magnet block 906 is greater than the elastic force of the fourth spring 905 when the compression degree is the maximum;

[0082] In order to enable the pressure rod 403 to automatically reset, a first spring 407 is sleeved on the connecting rod 404, one end of the first spring 407 is against one side of the first stopper 405, and the other end of the first spring 407 is against one side of the first slide groove 401, and the stiffness coefficient of the first spring 407 is smaller than the stiffness coefficient of the fourth spring 905.

[0083] By adopting the above technical solution, when it is necessary to withdraw the material, the piston rod of the control electric cylinder 501 is retracted, thereby driving the sliding block 505 to move in the direction away from the die 3, so that the sliding block 505 pushes the sleeve 503 to move in the direction away from the die 3, and then the punch 4 moves in the direction away from the die 3. As the punch 4 continues to move in the direction away from the die 3, the pressure rod 403 is still connected to the insertion rod 904 under the magnetic attraction of the second magnet block 906 and the first magnet block 406, but as the punch 4 continues to move, the first stopper 405 moves into the interior of the first slide groove 401, and the first spring 407 is continuously compressed. When the first spring When 407 is at the maximum compression, the punch 4 is completely pulled out from the die 3. At this time, the punch 4 continues to move backward. Because the magnetic force between the second magnet block 906 and the first magnet block 406 is greater than the elastic force of the fourth spring 905 when the compression degree is the maximum, the insertion rod 904 drives the stripping plate 901 to move toward the second mounting plate 2, so that the stripping plate 901 pushes the plastic product in the die 3 out. When the piston rod of the electric cylinder 501 retracts to the maximum, the second magnet block 906 is separated from the first magnet block 406, and the stripping plate 901 is reset to the groove 301 under the elastic force of the fourth spring 905, and the pressure rod 403 is also reset under the elastic force of the first spring 407.

[0084] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation mode of the present invention in the actual process is described in detail below.

[0085] Working principle: The operation process of the plastic product molding device specifically includes the following steps:

[0086] S1, mold closing, control the piston rod of the electric cylinder 501 to extend, so that the connecting plate 502 drives the movable rod 504 to move in the direction of the die 3, so that the sliding block 505 pushes the second spring 506 to move in the direction of the die 3, and then the second spring 506 pushes the punch 4 to move in the direction of the die 3, so that the die 3 and the punch 4 are closed;

[0087] S2, squeeze out the coolant, continue to control the piston rod of the electric cylinder 501 to extend, so that the second spring 506 is gradually compressed, and at the same time the push rod 807 squeezes the second stopper 803, so that the piston 805 moves toward the first mounting plate 1, and then the coolant in the cooling pipe 601 is hydraulically returned to the box body 701. At this time, there is a stable mold clamping pressure between the die 3 and the punch 4, and the third spring 804 is in a compressed state. At this time, the semiconductor refrigeration sheet 702 is controlled to start, and the coolant in the box body 701 is cooled;

[0088] S3, injection molding, adding liquid material into the injection port of the male mold 4, so that the liquid material enters the molding cavity for molding;

[0089] S4, cooling, at this time, the piston rod of the control electric cylinder 501 is retracted for a distance, so that the push rod 807 releases the squeezing of the second stopper 803, and at the same time, the second spring 506 is still in a compressed state, so that the male mold 4 and the female mold 3 are still in a mold closing state, and at this time, the piston 805 moves away from the first mounting plate 1 under the elastic force of the third spring 804, and then the coolant inside the box 701 is sucked into the cooling pipe 601, so as to cool the plastic product in the molding cavity;

[0090] S5, mold opening and material withdrawal, control the piston rod of the electric cylinder 501 to retract, thereby driving the sliding block 505 to move away from the die 3, so that the sliding block 505 pushes the sleeve 503 to move away from the die 3, and then the punch 4 moves away from the die 3. As the punch 4 continues to move away from the die 3, the pressure rod 403 is still connected to the insertion rod 904 under the magnetic attraction of the second magnet block 906 and the first magnet block 406, but as the punch 4 continues to move, the first stopper 405 moves into the first slide groove 401, and the first spring 407 is continuously compressed. When the first spring 407 is at the maximum compression When measuring, the punch 4 is completely pulled out of the die 3, and the punch 4 continues to move backward. Because the magnetic force between the second magnet block 906 and the first magnet block 406 is greater than the elastic force of the fourth spring 905 when it is compressed to the maximum, the insertion rod 904 drives the stripping plate 901 to move in the direction of the second mounting plate 2, and then the stripping plate 901 pushes the plastic product in the die 3 out. When the piston rod of the electric cylinder 501 retracts to the maximum, the second magnet block 906 is separated from the first magnet block 406, and the stripping plate 901 is reset to the groove 301 under the elastic force of the fourth spring 905, and the pressure rod 403 is also reset under the elastic force of the first spring 407.

[0091] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic product forming device, characterized in that: include: A first mounting plate (1) and a second mounting plate (2), wherein four guide pillars (101) are fixedly connected between the first mounting plate (1) and the second mounting plate (2); A female mold (3) and a male mold (4), wherein the female mold (3) is fixedly mounted on one end of the guide column (101) close to the first mounting plate (1), and a guide hole (4011) is provided on the male mold (4), and the male mold (4) is slidably mounted on the guide column (101) through the guide hole (4011); A driving mechanism (5), the driving mechanism (5) is used to drive the male mold (4) to perform a mold closing or mold opening operation; A cooling mechanism, the cooling mechanism being used to cool the plastic product in the molding cavity formed by the female mold (3) and the male mold (4) after the mold is closed; A material ejection mechanism (9) is used to eject the plastic product formed in the concave mold (3) from the concave mold (3).

2. A plastic product forming device according to claim 1, characterized in that: The driving mechanism (5) comprises an electric cylinder (501) and two sleeves (503), wherein the electric cylinder (501) is fixedly mounted on one side of the second mounting plate (2), one end of each of the two sleeves (503) is fixedly connected to a side of the punch (4) away from the die (3), the piston rod end of the electric cylinder (501) is fixedly connected to a connecting plate (502), the interiors of the two sleeves (503) are slidably connected to sliding blocks (505), one side of each of the sliding blocks (505) is fixedly connected to a movable rod (504), one end of the movable rod (504) away from the sliding block (505) slides through one end of the sleeve (503) and is fixedly connected to the connecting plate (502), and a second spring (506) is arranged inside the sleeve (503), one end of the second spring (506) abuts against one side of the punch (4), and the other end of the second spring (506) abuts against one side of the sliding block (505).

3. A plastic product forming device according to claim 2, characterized in that: The cooling mechanism comprises a cooling component (6), a cold source component (7) and a pressure component (8); A cooling cavity (303) is provided inside the concave mold (3), and the cooling component (6) is arranged inside the concave mold (3). The cooling component (6) is used to exchange heat with the cooling cavity (303), thereby cooling the plastic product in the molding cavity formed by the concave mold (3) and the convex mold (4) after the mold is closed. The cold source component (7) is provided with a cooling liquid, and the cold source component (7) is connected to the lower end of the cooling component (6); When the plastic product in the molding cavity needs to be cooled, the pressure component (8) can draw the cooling liquid in the cold source component (7) into the cooling component (6); when injection molding is required, the pressure component (8) presses the cooling liquid in the cooling component (6) back into the cold source component (7).

4. A plastic product forming device according to claim 3, characterized in that: The cooling assembly (6) comprises a cooling pipe (601), a plurality of cooling pipes (601) are provided, and the plurality of cooling pipes (601) are all provided in the cooling cavity (303); The cold source assembly (7) comprises a box body (701), the box body (701) is fixedly connected to the lower end of one side of the first mounting plate (1), a semiconductor refrigeration sheet (702) is fixedly embedded in the bottom of the box body (701), the cooling surface of the semiconductor refrigeration sheet (702) is arranged inside the box body (701), the heating surface of the semiconductor refrigeration sheet (702) is arranged outside the box body (701), and the lower end of the cooling tube (601) is connected to the lower end of the box body (701); The pressure assembly (8) comprises a pressure box (801), the pressure box (801) is fixedly mounted on an upper end of one side of the first mounting plate (1), a piston (805) is slidably arranged inside the pressure box (801), one side of the piston (805) is fixedly connected to a rod body (802), an end of the rod body (802) away from the piston (805) slides through one side of the pressure box (801) and is fixedly connected to a second stopper (803), the rod body (802) A third spring (804) is sleeved, one end of the third spring (804) abuts against one side of the second stopper (803), and the other end of the third spring (804) abuts against one side of the pressure box (801); a transverse tube (806) is fixedly connected to the bottom of the pressure box (801), and the transverse tube (806) is internally connected to one end of the pressure box (801) close to the first mounting plate (1); the upper end of the cooling tube (601) is connected to the transverse tube (806).

5. A plastic product forming device according to claim 4, characterized in that: A plurality of heat-conducting fins (602) are fixedly connected to the cooling tube (601), and the heat-conducting fins (602) are in contact with the interior of the cooling cavity (303).

6. A plastic product forming device according to claim 5, characterized in that: A heat conducting plate (703) is arranged inside the box body (701), and the cooling surface of the semiconductor cooling plate (702) is in contact with the bottom of the heat conducting plate (703).

7. A plastic product forming device according to claim 6, characterized in that: The sliding block (505) is fixedly connected with a push rod (807), the upper end of which is capable of squeezing the second stopper (803), and the sleeve (503) is provided with a strip-shaped slide groove (5031), the lower end of which is slidably arranged in the strip-shaped slide groove (5031).

8. A plastic product forming device according to claim 7, characterized in that: The material stripping mechanism (9) comprises a material stripping plate (901), a sliding rod (902), a cross beam (903) and an insert rod (904); a groove (301) is provided on the inner side of the concave mold (3); the material stripping plate (901) is arranged in the groove (301); a through hole (302) connected to the groove (301) is provided on the concave mold (3); the sliding rod (902) is slidably inserted in the through hole (302); one end of the sliding rod (902) is fixedly connected to one side of the material stripping plate (901); the other end of the sliding rod (902) is fixedly connected to the cross beam (903) The insert rod (904) is fixedly connected to the end of the cross beam (903), a plug hole (304) is provided on the die (3), one end of the insert rod (904) away from the cross beam (903) is slidably inserted into the plug hole (304), one end of the insert rod (904) away from the cross beam (903) is embedded with a second magnet block (906), a fourth spring (905) is sleeved on the insert rod (904), one end of the fourth spring (905) is against one side of the cross beam (903), and the other end of the fourth spring (905) is against one side of the die (3); The punch (4) is provided with a first slide groove (401) and a second slide groove (402), the first slide groove (401) and the second slide groove (402) are connected, a pressure rod (403) is slidably arranged in the second slide groove (402), one end of the pressure rod (403) extends out of the second slide groove (402), one end of the pressure rod (403) close to the first slide groove (401) is fixedly connected with a connecting rod (404), and one end of the connecting rod (404) away from the second slide groove (402) slides into the interior of the first slide groove (401), and the connecting rod (404) away from the second slide groove (402) is fixedly connected with a connecting rod (404). One end of the pressure rod (403) is fixedly connected to a first stopper (405), and the first stopper (405) is slidably set in the first slide groove (401). The end of the second slide groove (402) away from the connecting rod (404) is embedded with a first magnet block (406). The pressure rod (403) can be extended into the insertion hole (304), and the first magnet block (406) and the second magnet block (906) can be magnetically attracted; the magnetic force between the first magnet block (406) and the second magnet block (906) is greater than the elastic force of the fourth spring (905) when the compression degree is the maximum.

9. A plastic product forming device according to claim 8, characterized in that: A first spring (407) is sleeved on the connecting rod (404), one end of the first spring (407) abuts against one side of the first stopper (405), and the other end of the first spring (407) abuts against one side of the first slide groove (401), and the stiffness coefficient of the first spring (407) is smaller than the stiffness coefficient of the fourth spring (905).

10. A plastic product forming device according to claim 9, characterized in that: The operation process of the plastic product forming device specifically includes the following steps: S1, mold closing, controlling the piston rod of the electric cylinder (501) to extend, thereby causing the connecting plate (502) to drive the movable rod (504) to move in the direction of the female mold (3), causing the sliding block (505) to push the second spring (506) to move in the direction of the female mold (3), thereby causing the second spring (506) to push the male mold (4) to move in the direction of the female mold (3), so that the female mold (3) and the male mold (4) are closed; S2, squeeze out the coolant, continue to control the piston rod of the electric cylinder (501) to extend, so that the second spring (506) is gradually compressed, and at the same time the push rod (807) squeezes the second stopper (803), so that the piston (805) moves in the direction of the first mounting plate (1), and then the coolant pressure in the cooling pipe (601) is returned to the box body (701). At this time, there is a stable mold clamping pressure between the die (3) and the punch (4), and at the same time the third spring (804) is in a compressed state. At this time, the semiconductor refrigeration plate (702) is controlled to start and cool the coolant in the box body (701); S3, injection molding, injecting liquid into the injection port of the male mold (4) so ​​that the liquid enters the molding cavity for molding; S4, cooling, at this time, the piston rod of the control electric cylinder (501) is retracted for a distance, so that the push rod (807) releases the squeezing of the second stopper (803), and at the same time, the second spring (506) is still in a compressed state, so that the male mold (4) and the female mold (3) are still in a mold closing state. At this time, the piston (805) moves away from the first mounting plate (1) under the elastic force of the third spring (804), thereby sucking the coolant inside the box (701) into the cooling pipe (601), so as to cool the plastic product in the molding cavity; S5, mold opening and material withdrawal, control the piston rod of the electric cylinder (501) to retract, thereby driving the sliding block (505) to move away from the die (3), so that the sliding block (505) pushes the sleeve (503) to move away from the die (3), thereby causing the punch (4) to move away from the die (3). As the punch (4) continues to move away from the die (3), the pressure rod (403) is still connected to the insertion rod (904) under the magnetic attraction of the second magnet block (906) and the first magnet block (406). However, as the punch (4) continues to move, the first stopper (405) moves into the interior of the first slide groove (401), and at the same time the first spring (407) is continuously compressed. When the first spring (407) is at the maximum compression When measuring, the punch (4) is completely pulled out of the die (3), and the punch (4) continues to move backward. Because the magnetic force between the second magnet block (906) and the first magnet block (406) is greater than the elastic force of the fourth spring (905) when it is compressed to the maximum, the insertion rod (904) drives the stripping plate (901) to move in the direction of the second mounting plate (2), thereby causing the stripping plate (901) to push out the plastic product in the die (3). When the piston rod of the electric cylinder (501) retracts to the maximum, the second magnet block (906) is separated from the first magnet block (406), and the stripping plate (901) is reset to the groove (301) under the elastic force of the fourth spring (905), and the pressure rod (403) is also reset under the elastic force of the first spring (407).

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