Cooling device of injection mold

Abstract

The invention relates to the technical field of forming machining, in particular to a cooling device of an injection mold. Comprising a base, a plurality of hydraulic rods fixedly installed at the upper end of the base, first springs arranged on the hydraulic rods in a sleeving mode, a lower mold fixedly installed at the upper ends of the hydraulic rods, an upper mold clamped to the upper end of the lower mold, a material conveying opening formed in the middle of the upper mold, and mold openings formed in the lower mold and the upper mold. And a first inner cavity and a second inner cavity are formed in the lower mold, and the first inner cavity communicates with the second inner cavity. Through the arrangement of the sliding groove, the guide groove, the baffle and other mechanisms, raw materials are fed into the die opening from the material conveying opening and then extruded, due to the fact that the raw materials are in a high-temperature state, the temperature of the first inner cavity and the temperature of the second inner cavity in the lower die rise, and the first memory spring in the groove is affected by the temperature and extends; the first memory spring extends upwards according to the groove structure and drives the rotating rod to rotate.

Description

Technical Field

[0001] The invention relates to the technical field of molding processing, in particular to a cooling device for an injection mold. Background Art

[0002] Injection molding machines are the main molding equipment that uses injection molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. They are divided into vertical, horizontal, and all-electric types. Injection molding machines can heat plastics and apply high pressure to molten plastics to make them eject and fill the mold cavity.

[0003] After the injection molding machine mold is used, some plastic residue will remain on the side wall of the mold. In order not to affect the quality of the plastic, it needs to be cleaned before injection molding again. During injection molding, the mold needs to be cooled to accelerate the molding of the plastic.

[0004] When raw materials are fed into the existing injection mold, since the feeding port is set in the open air, impurities contained in the air and plastic particles floating in the surrounding environment will gradually enter the raw materials along with the airflow generated by the high temperature of the raw materials, making the raw materials unable to meet the production standards when the products are injected, resulting in the failure of the injection molding work.

[0005] In order to speed up the injection molding of the product inside the mold, cold water is continuously input at the beginning of injection molding, resulting in the cooling facilities of the injection mold consuming a large amount of water resources, resulting in a waste of water resources, and the continuous input of cold water will increase the preheating time of the mold molding.

[0006] Therefore, a cooling device for an injection mold is proposed. Summary of the invention

[0007] In order to overcome the above-mentioned defects of the prior art, the present invention provides a cooling device for an injection mold. The technical problems to be solved by the present invention are: 1. Since the feeding port end of the existing injection mold is set in the open air, impurities contained in the air and plastic particles floating in the surrounding environment will enter the raw materials;

[0008] 2. In order to speed up the injection molding of the product inside the mold, cold water is continuously input at the beginning of injection molding, resulting in the cooling facilities of the injection mold consuming a large amount of water resources, resulting in a waste of water resources.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cooling device for an injection mold, comprising a base, a plurality of hydraulic rods fixedly mounted on the upper end of the base, a first spring sleeved on the hydraulic rods, a lower mold fixedly mounted on the upper end of the hydraulic rods, an upper mold engaged with the upper end of the lower mold, a feed port opened in the middle of the upper mold, and a mold opening opened inside the lower mold and the upper mold, wherein a first inner cavity and a second inner cavity are opened inside the lower mold, and the first inner cavity and the second inner cavity are communicated, and a protective mechanism for shielding the mold opening is arranged inside the first inner cavity and the second inner cavity;

[0010] The protection mechanism includes a plurality of slide grooves provided at the bottom of the first inner cavity, a plurality of guide grooves provided on the top wall of the second inner cavity, slide rods are slidably installed between the plurality of slide grooves and the plurality of guide grooves, a baffle is fixedly installed on the slide rod, a planetary gear is fixedly installed on the side wall of the baffle, a plurality of grooves are provided on the inner wall of the second inner cavity, a rotating rod is rotatably installed inside the plurality of grooves, a first memory spring is sleeved on the rotating rod, two ends of the first memory spring are respectively fixedly connected to the bottom wall of the groove and the rotating rod, a gear is fixedly installed on the top of the rotating rod, and the planetary gear and the gear are meshed with each other.

[0011] In a preferred embodiment, a first water storage tank and a second water storage tank are fixedly installed on one side of the lower mold, a water inlet pipe connected to a water pump is fixedly installed on the side wall of the first water storage tank, a water inlet is opened on the side wall of the first water storage tank and the lower mold, a cooling groove is opened inside the first water storage tank, a water outlet is opened on one side of the second water storage tank and the lower mold, and a connecting pipe is fixedly connected between the first water storage tank and the second water storage tank;

[0012] A plurality of connecting grooves are provided inside the lower mold, and both ends of the plurality of connecting grooves are respectively connected to the groove and the cooling groove, and a gas-water separation membrane is fixedly installed inside the connecting groove;

[0013] A second spring is fixedly connected to the inner wall of the first water storage tank, a movable plate is fixedly installed on the other end of the second spring, and a blocking plate is fixedly installed on the other side of the movable plate.

[0014] In a preferred embodiment, a fixing rod is fixedly installed on the inner wall of the water outlet, a telescopic rod is fixedly installed on one side of the fixing rod, a piston is fixedly installed on the other end of the telescopic rod, a second memory spring is sleeved on the telescopic rod, and both ends of the second memory spring are respectively fixedly connected to the side walls of the fixing rod and the piston.

[0015] In a preferred embodiment, the cooling groove is configured as a serpentine structure.

[0016] In a preferred embodiment, the baffle is made of butadiene rubber.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention provides mechanisms such as slide grooves, guide grooves, baffles, etc., and the raw materials are put into the die mouth from the feeding port and then extruded. Because the raw materials are in a high temperature state, the temperature of the first inner cavity and the second inner cavity inside the lower mold rises, and the first memory spring in the groove is affected by the temperature and extends. Because the groove is set as a threaded structure, the first memory spring will extend upward according to the groove structure, and the first memory spring will drive the rotating rod to rotate, and the rotating rod will drive the gear to rotate. The planetary gear rotates under the drive of the gear, and then drives the baffle to move. The baffle drives the sliding rod to slide along the inside of the slide groove and the guide groove, and then drives multiple baffles to approach each other, and the die mouth is sealed to prevent external impurities from entering the die mouth, causing pollution to the raw materials and affecting product quality. After cooling, the first memory spring is reset, driving the rotating rod to rotate in the opposite direction, and the baffle no longer blocks the die mouth.

[0019] 2. The present invention sets a first water tank, a second water tank, a water inlet pipe and other mechanisms. A water pump guides cold water from the water inlet pipe into the first water tank. The cold water then enters the interior of the cooling tank to cool the lower mold and help the product to be formed. The cold water evaporates in the cooling tank due to the temperature. After the water vapor passes through the air-water separation membrane inside the connecting tank, the hot air enters the groove, heats the first memory spring, and causes the first memory spring to stretch. Hot water enters the second water tank from the water outlet. As the amount of water in the second water tank increases, hot water will enter the first water tank from the connecting pipe. As the amount of hot water gradually increases, the movable plate is pushed, and the movable plate overcomes the elastic force of the second spring and drives the blocking plate to move. The side of the blocking plate stops when it moves to the mid-vertical line of the water inlet, so that the water inlet at the water inlet is reduced within the same time, thereby reducing the waste of water resources.

[0020] 3. The present invention sets a telescopic rod, a second memory spring, a piston and other mechanisms. At first, the second memory spring is extended by the influence of the temperature of the lower mold, and the water outlet of the second water storage tank is sealed, so that the cold water stays in the cooling tank, accelerating the cooling of the lower mold. When the temperature of the lower mold decreases, the second memory spring contracts, thereby driving the telescopic rod to contract, the piston and the water outlet are no longer sealed, and hot water enters the second water storage tank, so that the hot water in the cooling tank is replaced by cold water again, thereby realizing the control of the entry and exit of cold water and hot water in the cooling tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a three-dimensional diagram of the rotating rod of the present invention;

[0023] Figure 3It is a top cross-sectional view of the second inner cavity of the present invention;

[0024] Figure 4 It is a top cross-sectional view of the first inner cavity of the present invention;

[0025] Figure 5 It is a side cross-sectional view of the groove of the present invention;

[0026] Figure 6 It is a side cross-sectional view of the cooling groove of the present invention;

[0027] Figure 7 It is a front cross-sectional view of the second water storage tank of the present invention;

[0028] Figure 8 It is a front cross-sectional view of the first water storage tank of the present invention;

[0029] Fig. 9 It is a side sectional view of the second water storage tank of the present invention;

[0030] Fig.10 It is an enlarged view of the protection mechanism of the present invention.

[0031] In the figure: 1. base; 2. hydraulic rod; 3. first spring; 4. lower mold; 51. upper mold; 52. feed port; 53. mold mouth; 6. protection mechanism; 61. first inner cavity; 62. second inner cavity; 641. slide groove; 642. guide groove; 65. slide rod; 66. baffle; 67. planetary gear; 68. groove; 69. rotating rod; 610. first memory spring; 611. gear; 71. first water storage tank; 72. second water storage tank; 73. water inlet pipe; 74. water inlet; 75. cooling groove; 751. connecting groove; 752. air-water separation membrane; 76. water outlet; 77. connecting pipe; 78. second spring; 79. movable plate; 710. blocking plate; 81. fixed rod; 82. telescopic rod; 83. second memory spring; 84. piston. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The cooling device of an injection mold involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0033] Reference Figure 1-Figure 10The present invention provides a cooling device for an injection mold, comprising a base 1, a plurality of hydraulic rods 2 fixedly mounted on the upper end of the base 1, a first spring 3 sleeved on the hydraulic rods 2, a lower mold 4 fixedly mounted on the upper end of the hydraulic rods 2, an upper mold 51 engaged with the upper end of the lower mold 4, a feed port 52 provided in the middle of the upper mold 51, a mold opening 53 provided inside the lower mold 4 and the upper mold 51, a first inner cavity 61 and a second inner cavity 62 provided inside the lower mold 4, and the first inner cavity 61 and the second inner cavity 62 are communicated, and a protective mechanism 6 for shielding the mold opening 53 is provided inside the first inner cavity 61 and the second inner cavity 62;

[0034] The protection mechanism 6 includes a plurality of slide grooves 641 provided at the bottom of the first inner cavity 61, a plurality of guide grooves 642 provided on the top wall of the second inner cavity 62, slide rods 65 are slidably installed between the plurality of slide grooves 641 and the plurality of guide grooves 642, a baffle 66 is fixedly installed on the slide rod 65, a planetary gear 67 is fixedly installed on the side wall of the baffle 66, a plurality of grooves 68 are provided on the inner wall of the second inner cavity 62, a rotating rod 69 is rotatably installed inside the plurality of grooves 68, a first memory spring 610 is sleeved on the rotating rod 69, two ends of the first memory spring 610 are respectively fixedly connected to the bottom wall of the groove 68 and the rotating rod 69, a gear 611 is fixedly installed on the top of the rotating rod 69, and the planetary gear 67 and the gear 611 are meshed with each other.

[0035] Compared with the prior art, the present invention provides mechanisms such as the slide groove 641, the guide groove 642, and the baffle 66. The raw material is fed from the feed port 52 into the die port 53 and then extruded. Because the raw material is in a high temperature state, the temperature of the first inner cavity 61 and the second inner cavity 62 inside the lower die 4 rises, and the first memory spring 610 in the groove 68 is elongated due to the temperature. Because the groove 68 is a threaded structure, the first memory spring 610 extends upward according to the structure of the groove 68, and the first memory spring 610 drives the rotating rod 69 to rotate. The rotating rod 69 will drive the gear 611 to rotate, and the planetary gear 67 will rotate under the drive of the gear 611, thereby driving the baffle 66 to move. The baffle 66 drives the slide rod 65 to slide along the inside of the slide groove 641 and the guide groove 642, thereby driving multiple baffles 66 to approach each other, sealing the die opening 53 to prevent external impurities from entering the die opening 53, causing pollution to the raw materials and affecting the product quality. After cooling, the first memory spring 610 is reset, driving the rotating rod 69 to rotate in the opposite direction, and the baffle 66 no longer blocks the die opening 53.

[0036] Reference Figure 1-Figure 8A first water storage tank 71 and a second water storage tank 72 are fixedly installed on one side of the lower mold 4, a water inlet pipe 73 connected to a water pump is fixedly installed on the side wall of the first water storage tank 71, a water inlet 74 is opened on the first water storage tank 71 and the side wall of the lower mold 4, a cooling groove 75 is opened inside the first water storage tank 71, a water outlet 76 is opened on the second water storage tank 72 and one side of the lower mold 4, and a connecting pipe 77 is fixedly connected between the first water storage tank 71 and the second water storage tank 72;

[0037] A plurality of connecting grooves 751 are provided inside the lower mold 4. The two ends of the plurality of connecting grooves 751 are respectively connected to the groove 68 and the cooling groove 75. An air-water separation membrane 752 is fixedly installed inside the connecting groove 751.

[0038] A second spring 78 is fixedly connected to the inner wall of the first water storage tank 71 , a movable plate 79 is fixedly mounted on the other end of the second spring 78 , and a blocking plate 710 is fixedly mounted on the other side of the movable plate 79 .

[0039] In the embodiment of the present application, the present invention sets a first water storage tank 71, a second water storage tank 72, a water inlet pipe 73 and other mechanisms, and a water pump introduces cold water from the water inlet pipe 73 into the first water storage tank 71, and the cold water then enters the interior of the cooling tank 75 to cool the lower mold 4 to help the product to be formed. The cold water evaporates in the cooling tank 75 due to the temperature, and the water vapor passes through the air-water separation membrane 752 inside the connecting groove 751 and the hot air enters the groove 68 to heat the first memory spring 610, so that the first memory spring The spring 610 stretches, and hot water enters the second water tank 72 from the water outlet 76. As the amount of water in the second water tank 72 increases, hot water will enter the first water tank 71 from the connecting pipe 77. As the amount of hot water gradually increases, the movable plate 79 is pushed, and the movable plate 79 overcomes the elastic force of the second spring 78 and drives the blocking plate 710 to move. When the side of the blocking plate 710 moves to the mid-vertical line of the water inlet, it will stop, so that the water inlet at the water inlet 74 is reduced in the same time, reducing the waste of water resources.

[0040] Reference Figure 1-Figure 9 A fixed rod 81 is fixedly installed on the inner wall of the water outlet 76, a telescopic rod 82 is fixedly installed on one side of the fixed rod 81, a piston 84 is fixedly installed on the other end of the telescopic rod 82, a second memory spring 83 is sleeved on the telescopic rod 82, and both ends of the second memory spring 83 are fixedly connected to the side walls of the fixed rod 81 and the piston 84 respectively.

[0041] In the embodiment of the present application, the present invention sets a telescopic rod 82, a second memory spring 83, a piston 84 and other mechanisms. At first, the second memory spring 83 is extended by the influence of the temperature of the lower mold 4, and the water outlet 76 of the second water tank 72 is sealed, so that the cold water stays in the cooling groove 75, accelerating the cooling of the lower mold 4. When the temperature of the lower mold 4 decreases, the second memory spring 83 contracts, thereby driving the telescopic rod 82 to contract, the piston 84 and the water outlet 76 are no longer sealed, and hot water enters the second water tank 72, so that the hot water in the cooling groove 75 is replaced by cold water again, thereby realizing the control of the entry and exit of cold water and hot water in the cooling groove 75.

[0042] Reference Figure 6 , the cooling groove 75 is set to a serpentine structure.

[0043] In the embodiment of the present application, the cooling groove 75 is set to a serpentine structure, so that the cold water flows inside the lower mold 4 for a longer time, the contact area between the cold water and the lower mold 4 is larger, and the cooling efficiency of the lower mold 4 is improved.

[0044] Reference Figure 3 The material of the baffle 66 is butadiene rubber.

[0045] In the embodiment of the present application, the butadiene rubber is heat-resistant, so that the baffle 66 will not be affected by the high temperature of the raw material and will not age; it has good elasticity, so that when the baffles 66 contact each other, they can contact more closely under their own elastic force.

[0046] Working principle:

[0047] The raw material is put into the die opening 53 from the feed port 52 and then extruded. Because the raw material is in a high temperature state, the temperature of the first inner cavity 61 and the second inner cavity 62 inside the lower mold 4 rises, and the water pump introduces cold water from the water inlet pipe 73 into the first water storage tank 71. The cold water then enters the interior of the cooling groove 75 to cool the lower mold 4 and help the product to be formed. The cold water evaporates in the cooling groove 75 due to the temperature. After the water vapor passes through the air-water separation membrane 752 inside the connecting groove 751, the hot air enters the groove 68 to heat the first memory spring 610. Because the groove 68 is set as a threaded structure, the first memory spring 610 will extend upward according to the structure of the groove 68, and the first memory spring 610 will drive the rotating rod 69 to rotate, and the rotating rod 69 will drive the gear 611 to rotate. The planetary gear 67 rotates under the drive of the gear 611, thereby driving the baffle 66 to move, and the baffle 66 drives the slide rod 65 along the slide groove 641 and the guide groove 642 , thereby driving the multiple baffles 66 to approach each other. At first, the second memory spring 83 is affected by the temperature of the lower mold 4 and extends, sealing the water outlet 76 of the second water tank 72, so that the cold water stays in the cooling groove 75, accelerating the cooling of the lower mold 4. When the temperature of the lower mold 4 decreases, the second memory spring 83 contracts, thereby driving the telescopic rod 82 to contract, the piston 84 and the water outlet 76 are no longer sealed, and hot water enters the second water tank 72 from the water outlet 76. As the amount of water in the second water tank 72 increases, hot water will enter the first water tank 71 from the connecting pipe 77. As the amount of hot water gradually increases, the movable plate 79 is pushed, and the movable plate 79 overcomes the elastic force of the second spring 78 and drives the blocking plate 710 to move. When the side of the blocking plate 710 moves to the mid-vertical line of the water inlet, it will stop, so that the water inlet at the water inlet 74 is reduced in the same time, reducing the waste of water resources.

[0048] Finally: The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cooling device for an injection mold, comprising a base (1), a plurality of hydraulic rods (2) fixedly mounted on the upper end of the base (1), a first spring (3) sleeved on the hydraulic rods (2), a lower mold (4) fixedly mounted on the upper end of the hydraulic rods (2), an upper mold (51) engaged with the upper end of the lower mold (4), a material delivery port (52) provided in the middle of the upper mold (51), and a mold opening (53) provided inside the lower mold (4) and the upper mold (51), characterized in that: The lower mold (4) has a first inner cavity (61) and a second inner cavity (62) formed therein, and the first inner cavity (61) and the second inner cavity (62) are communicated with each other, and a protective mechanism (6) for shielding the mold opening (53) is provided inside the first inner cavity (61) and the second inner cavity (62); The protection mechanism (6) comprises a plurality of slide grooves (641) provided at the bottom of the first inner cavity (61), a plurality of guide grooves (642) provided on the top wall of the second inner cavity (62), a slide rod (65) slidably installed between the plurality of slide grooves (641) and the plurality of guide grooves (642), a baffle (66) fixedly installed on the slide rod (65), a planetary gear (67) fixedly installed on the side wall of the baffle (66), a plurality of grooves (68) provided on the inner wall of the second inner cavity (62), a rotating rod (69) rotatably installed inside the plurality of grooves (68), a first memory spring (610) sleeved on the rotating rod (69), two ends of the first memory spring (610) are respectively fixedly connected to the bottom wall of the groove (68) and the rotating rod (69), a gear (611) is fixedly installed on the top of the rotating rod (69), and the planetary gear (67) and the gear (611) are meshed with each other.

2. A cooling device for an injection mold according to claim 1, characterized in that: A first water storage tank (71) and a second water storage tank (72) are fixedly mounted on one side of the lower mold (4); a water inlet pipe (73) connected to a water pump is fixedly mounted on the side wall of the first water storage tank (71); a water inlet (74) is provided on the first water storage tank (71) and the side wall of the lower mold (4); a cooling groove (75) is provided inside the first water storage tank (71); a water outlet (76) is provided on one side of the second water storage tank (72) and the lower mold (4); and a connecting pipe (77) is fixedly connected between the first water storage tank (71) and the second water storage tank (72).

3. A cooling device for an injection mold according to claim 2, characterized in that: A plurality of connecting grooves (751) are provided inside the lower mold (4), and the two ends of the plurality of connecting grooves (751) are respectively connected to the groove (68) and the cooling groove (75), and a gas-water separation membrane (752) is fixedly installed inside the connecting groove (751).

4. The cooling device for an injection mold according to claim 2, characterized in that: A second spring (78) is fixedly connected to the inner wall of the first water storage tank (71), a movable plate (79) is fixedly mounted on the other end of the second spring (78), and a blocking plate (710) is fixedly mounted on the other side of the movable plate (79).

5. The cooling device for an injection mold according to claim 2, characterized in that: A fixed rod (81) is fixedly mounted on the inner wall of the water outlet (76); a telescopic rod (82) is fixedly mounted on one side of the fixed rod (81); a piston (84) is fixedly mounted on the other end of the telescopic rod (82); a second memory spring (83) is sleeved on the telescopic rod (82); and two ends of the second memory spring (83) are respectively fixedly connected to the side walls of the fixed rod (81) and the piston (84).

6. The cooling device for an injection mold according to claim 2, characterized in that: The cooling groove (75) is configured as a serpentine structure.

7. The cooling device for an injection mold according to claim 1, characterized in that: The baffle (66) is made of butadiene rubber.

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