A mold for plastic injection molding

Abstract

The invention discloses a mold for plastic injection molding, which relates to the technical field of plastic molding processing, and comprises a bottom plate and vertical rods symmetrically fixed around the top of the bottom plate, the top ends of the vertical rods are fixedly connected to the same top plate, and also comprises: a hydraulic rod is symmetrically fixedly installed inside the top plate, an upper die is installed below the top plate, an injection tube is installed on the top of the upper die, a lower mold plate is fixedly installed in the middle of the top of the bottom plate, a knocking assembly is arranged inside the lower mold plate, and a cooling assembly is arranged on the outer side of the upper die; the knocking assembly comprises a pressing plate, the bottom ends of the telescopic parts of the two hydraulic rods are fixedly connected to the top of the pressing plate, and the top of the upper die is symmetrically fixedly connected to a sliding rod, which solves the problem that bubbles may be generated inside the cavity during the injection molding process, and if the bubbles are not processed, these bubbles will affect the injection molding effect, thereby affecting the quality of the final finished plastic parts.

Description

Technical Field

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

[0002] Among the processing methods of plastic parts, injection molding is the most important one. By loading hot-melt material between two molds, waiting for it to cool and take shape, and then demolding, a plastic part in the shape of the mold can be obtained.

[0003] For example, an injection molding mold for plastic toy production with announcement number CN211993939U includes a fixed base plate, and limit sleeves are arranged on both sides of the top of the fixed base plate. The inner wall of the limit sleeve is movably connected to the limit rod, the top of the limit rod is connected to the top plate, the bottom of the top plate is connected to the movable template, the bottom of the movable template is connected to the fixed plate, the bottom of the fixed plate is connected to the upper template, a mold base is movably arranged below the fixed plate, and a water cooling mechanism is arranged in the inner cavity of the mold base, a fixed template is arranged on the top of the fixed base plate, and a lower template is arranged on the top of the fixed template. Rotating clamping rods are movably arranged on both sides of the inner wall of the movable template through a pin shaft, and a telescopic spring is arranged on the inner wall of the movable template, which can ensure better stability during injection mold parting and realize water circulation cooling, so as to ensure the quality accuracy of the processed part while ensuring the processing speed. However, during the injection molding process, bubbles may be generated inside the cavity, and the device does not process the bubbles. These bubbles will affect the injection molding effect, thereby affecting the quality of the final finished plastic parts, and there are certain defects.

[0004] Therefore, a mold for plastic injection molding is proposed to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a mold for plastic injection molding to solve the problem that bubbles may be generated inside the cavity during the injection molding process. If the bubbles are not processed, these bubbles will affect the injection molding effect and thus affect the quality of the final finished plastic part.

[0006] To achieve the above object, the present invention provides the following technical solution: a mold for plastic injection molding, comprising a bottom plate and vertical rods symmetrically fixed around the top of the bottom plate, the top ends of the vertical rods being fixedly connected to the same top plate;

[0007] Also includes:

[0008] A hydraulic rod is symmetrically fixedly installed inside the top plate, an upper die is installed below the top plate, an injection tube is installed on the top of the upper die, a lower die is fixedly installed in the middle of the top of the bottom plate, a knocking assembly is arranged inside the lower die, and a cooling assembly is arranged on the outside of the upper die;

[0009] The knocking assembly includes a pressing plate, the bottom ends of the telescopic parts of the two hydraulic rods are fixedly connected to the top of the pressing plate, the top of the upper die is symmetrically fixedly connected with a sliding rod, the sliding rod is slidably connected to the pressing plate, the outer side of the sliding rod is sleeved with a spring, one side of the telescopic part of the hydraulic rod is fixedly connected with a connecting plate, the upper outer side of the vertical rod is slidably connected with a ring, a horizontal plate is fixedly connected between the two rings on the same vertical line, and the connecting plate is fixedly connected to the horizontal plate;

[0010] A rack is fixedly connected to the bottom of the horizontal plate, a mounting plate is fixedly connected to the middle of the vertical rod on one side, a gear is rotatably connected to the side of the mounting plate close to the rack, the rack is meshingly connected to the gear, a fixed ring is fixedly connected to the middle of the outer side of the lower template, a rotating member is rotatably connected to the outer side of the lower template, a gear ring is fixedly connected to the top array of the rotating member, and the gear is meshingly connected to the gear ring;

[0011] An inner cavity is provided inside the fixed ring, a mounting groove is provided at the bottom of the rotating member, a push rod is slidably connected inside the mounting groove, a second spring is fixedly installed inside the mounting groove, the second spring is connected to the push rod, an inner bottom surface of the inner cavity is rotatably connected to a rotating shaft, a rotating rod is fixedly connected to the outer side of the rotating shaft, a knocking block is fixedly connected to one end of the rotating rod close to the lower template, a limiting plate is symmetrically fixedly connected to the outer side of the lower template, and a spring three is fixedly connected to the side of the limiting plate close to the rotating rod;

[0012] The cooling assembly comprises a fixed rod, which is fixedly connected to the rotating member. A rotating ring is rotatably connected to the outer side of the upper die. The fixed rod is fixedly installed on the rotating ring, and a connecting pipe is installed on the top of the rotating ring.

[0013] Preferably, there are no less than two sliding rods, the spring 1 is fixedly connected to the sliding rod, the top end of the spring 1 is fixedly connected to the pressure plate, and the bottom end of the spring 1 is fixedly connected to the upper pressure die.

[0014] By adopting the above technical solution, it is convenient to drive the knocking block to knock intermittently while pressing down, which reduces the generation of bubbles, facilitates the subsequent rapid cooling process, and improves the injection molding effect.

[0015] Preferably, the injection molding tube is slidably connected to the top plate, the injection molding tube is slidably connected to the pressure plate, two mounting plates are provided, the mounting plates are centrally symmetrically arranged, the bottom of the rotating part is fitted with the top of the fixed ring, and the inner diameter of the rotating part is larger than the outer diameter of the lower template.

[0016] By adopting the above technical solution, the descent of the rack will drive the gear to rotate, and the rotation of the gears on both sides can drive the rotating part to rotate.

[0017] Preferably, the inner cavity is opened in a ring shape, the mounting groove is opened in an array, the inner top surface of the mounting groove is fixedly connected with a top block, the top end of the spring 2 is fixedly connected to the top block, and the bottom end of the spring 2 is fixedly connected to the push rod.

[0018] By adopting the above technical solution, the rotating member drives the push rod to rotate. When the push rod contacts the rotating rod, since the elastic coefficient of spring two is greater than the elastic coefficient of spring three, the push rod pushes the rotating rod to rotate.

[0019] Preferably, the bottom of the push rod is arranged in an arc shape, the number of the rotating rods is the same as the push rods, and the rotating rods are arranged horizontally.

[0020] By adopting the above technical solution, the arc surface of the push rod cooperates with the rotating rod, so that the push rod is squeezed into the installation groove, the push rod compresses the second spring, and when the push rod is separated from the rotating rod, the second spring drives the push rod to reset.

[0021] Preferably, two limiting plates are arranged on the outer side of each rotating rod, the rotating rod is located on the inner side of two adjacent limiting plates, and one end of the spring three away from the limiting plates is fixedly connected to the rotating rod.

[0022] By adopting the above technical solution, when the push rod is reset, the two springs drive the rotating rod to reset, so that the knocking block knocks on the lower template. As the rotating part rotates, multiple knocking blocks intermittently knock on the lower template, which is convenient for reducing bubbles inside the plastic raw material inside the lower template.

[0023] Preferably, the fixed rods are symmetrically arranged, the top of the rotating member is fixedly connected to the bottom of the fixed rods, there are no less than two fixed rods, and the inside of the rotating ring is fixedly connected with connecting blocks, the connecting blocks are symmetrically arranged, and the number of the connecting blocks is the same as the fixed rods.

[0024] By adopting the above technical solution, the rotating member will also drive the fixed rod to rotate, and the fixed rod will drive the connecting block and the rotating ring to rotate, so that the rotating ring can drive the nozzle head to rotate.

[0025] Preferably, the connecting block is slidably connected to the fixed rod, the connecting pipes are symmetrically arranged, there are no less than two connecting pipes, the upper part of the connecting pipe is fixedly connected to the top plate, and the bottom end of the connecting pipe is connected to the rotating ring.

[0026] By adopting the above technical solution, low-temperature gas is input into the rotating ring through the connecting pipe, and then sprayed out by the nozzle head at the bottom of the rotating ring to reduce the temperature.

[0027] Preferably, a nozzle head is fixedly mounted on the inner side of the rotating ring, the nozzle head is connected to the connecting pipe through the rotating ring, the nozzle head is arranged in an array, and the number of the nozzle heads is not less than six.

[0028] By adopting the above technical solution, it is convenient to fully and evenly cool the outer sides of the upper die and the lower die plate, thereby accelerating the rapid molding of internal plastic parts and improving the efficiency of injection molding processing.

[0029] Compared with the prior art, the invention has the following beneficial effects: through the cooperation of the knocking assembly and the cooling assembly, it is convenient to drive the knocking block to knock intermittently while pressing down, thereby reducing the generation of bubbles, facilitating the subsequent rapid cooling process, and improving the injection molding processing effect;

[0030] 1. A knocking assembly is provided. By starting the hydraulic rod, the hydraulic rod drives the pressure plate to descend, and the pressure plate drives the upper die to be pressed down through the sliding rod. The hydraulic rod drives the connecting plate to descend at the same time, and the connecting plate drives the cross plate to descend. The cross plate drives the ring to slide on the vertical rod, and the cross plate drives the rack to press down. The upper die first contacts and presses the lower template tightly, and the material is injected through the injection tube. At this time, the hydraulic rod continues to descend, and the position of the upper die does not move. The pressure plate slides on the sliding rod and compresses the spring 1. At this time, the rack just meshes with the gear. The continued descent of the rack will drive the gear to rotate. The rotation of the gears on both sides can drive the rotating parts to rotate, and the rotating parts drive the push rod to rotate. When the push rod contacts the rotating rod, the elastic coefficient of spring 2 is greater than the elastic coefficient of spring 3, which makes the push rod push. The movable rotating rod rotates, and the rotating rod compresses spring three, so that the knocking block is separated from the lower template and stuck on one side of the limit plate, and then the arc surface of the push rod cooperates with the rotating rod, so that the push rod is squeezed into the installation groove, and the push rod compresses spring two. When the push rod is separated from the rotating rod, spring two drives the push rod to reset, and the two springs three drive the rotating rod to reset, so that the knocking block knocks on the lower template. With the rotation of the rotating part, multiple knocking blocks intermittently knock on the lower template, which is convenient for reducing the bubbles inside the plastic raw material inside the lower template, until spring one is compressed to the extreme, and the injection molding operation is completed, reducing the influence of bubbles in the production process, and after the injection molding is completed, the knocking block will still knock intermittently, which is convenient for separating the plastic parts from the upper die and the lower template to take out the material;

[0031] A cooling component is provided. When the rotating part rotates, the rotating part will also drive the fixed rod to rotate, the fixed rod drives the connecting block and the rotating ring to rotate, the rotating ring drives the nozzle head to rotate, the connecting pipe is connected to the external low-temperature gas generating device, and the connecting pipe is a telescopic hose, which can adapt to the fewer turns of the rotating ring. After the injection molding is completed, the low-temperature gas is input into the rotating ring through the connecting pipe, and then sprayed out by the nozzle head at the bottom of the rotating ring in a circle, which is convenient for fully and evenly cooling the outer side of the upper mold and the lower mold plate, thereby accelerating the rapid molding of internal plastic parts and improving the efficiency of the injection molding process. Through the cooperation of the knocking component and the cooling component, it is convenient to drive the knocking block to knock intermittently while pressing down, thereby reducing the generation of bubbles, facilitating the subsequent rapid cooling process, improving the injection molding process effect, and solving the problem that bubbles may be generated inside the cavity during the injection molding process. If the bubbles are not handled, these bubbles will affect the injection molding effect and thus affect the quality of the final finished plastic parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the first three-dimensional overall structure of the present invention;

[0033] Figure 2 It is a schematic diagram of a second three-dimensional overall structure of the present invention;

[0034] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0035] Figure 4 This is a schematic diagram of the installation structure of the horizontal plate of the present invention;

[0036] Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0037] Figure 6 It is a schematic diagram of the cross-sectional structure of the rotating part of the present invention;

[0038] Figure 7 For the present invention Figure 6 The enlarged structural diagram at C in the middle;

[0039] Figure 8 For the present invention Figure 6 The enlarged structural diagram at D in the middle;

[0040] Fig. 9 It is a schematic diagram of the pressing state of the present invention;

[0041] Fig.10 This is a schematic diagram of the connecting pipe installation structure of the present invention;

[0042] Fig.11 For the present invention Fig.10 Enlarged structural diagram at E in the middle.

[0043] In the figure: 1. bottom plate; 2. vertical rod; 3. top plate; 4. hydraulic rod; 5. upper die; 6. injection molding tube; 7. lower die plate; 8. knocking assembly; 81. pressing plate; 82. sliding rod; 83. spring one; 84. connecting plate; 85. ring; 86. horizontal plate; 87. rack; 88. mounting plate; 89. gear; 810. fixed ring; 811. rotating member; 812. gear ring; 813. inner cavity; 814. mounting groove; 815. pushing rod; 816. top block; 817. spring two; 818. rotating shaft; 819. rotating rod; 820. knocking block; 821. limiting plate; 822. spring three; 9. cooling assembly; 91. fixed rod; 92. rotating ring; 93. connecting block; 94. connecting pipe; 95. nozzle head. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] See also Figure 1-Figure 11 The present invention provides a technical solution: a mold for plastic injection molding, comprising a bottom plate 1 and vertical rods 2 symmetrically fixed around the top of the bottom plate 1, and the tops of the vertical rods 2 are fixedly connected to the same top plate 3.

[0046] A hydraulic rod 4 is symmetrically fixedly installed inside the top plate 3 , an upper die 5 is installed below the top plate 3 , an injection tube 6 is installed on the top of the upper die 5 , and a lower die plate 7 is fixedly installed in the middle of the top of the bottom plate 1 .

[0047] A knocking assembly 8 is provided inside the lower template 7, and the knocking assembly 8 includes a pressing plate 81. The bottom ends of the telescopic parts of the two hydraulic rods 4 are fixedly connected to the top of the pressing plate 81, and a sliding rod 82 is symmetrically fixedly connected to the top of the upper die 5. The sliding rod 82 is slidably connected to the pressing plate 81, and a spring 83 is sleeved on the outer side of the sliding rod 82. A connecting plate 84 is fixedly connected to one side of the telescopic part of the hydraulic rod 4, and a ring 85 is slidably connected to the upper outer side of the vertical rod 2. A horizontal plate 86 is fixedly connected between the two rings 85 on the same vertical line, and the connecting plate 84 is fixedly connected to the horizontal plate 86.

[0048] There are no less than two slide bars 82, a spring 83 is fixedly connected to the slide bar 82, a top end of the spring 83 is fixedly connected to the pressing plate 81, and a bottom end of the spring 83 is fixedly connected to the upper pressing die 5.

[0049] A rack 87 is fixedly connected to the bottom of the horizontal plate 86, a mounting plate 88 is fixedly connected to the middle of the vertical rod 2 on one side, a gear 89 is rotatably connected to the side of the mounting plate 88 close to the rack 87, the rack 87 is meshingly connected to the gear 89, a fixing ring 810 is fixedly connected to the middle of the outer side of the lower template 7, a rotating member 811 is rotatably connected to the outer side of the lower template 7, a gear ring 812 is fixedly connected to the top array of the rotating member 811, and the gear 89 is meshingly connected to the gear ring 812.

[0050] The injection molding tube 6 is slidably connected to the top plate 3, and the injection molding tube 6 is slidably connected to the pressure plate 81. Two mounting plates 88 are provided, and the mounting plates 88 are centrally symmetrically arranged. The bottom of the rotating part 811 fits with the top of the fixed ring 810, and the inner diameter of the rotating part 811 is larger than the outer diameter of the lower template 7.

[0051] An inner cavity 813 is provided inside the fixed ring 810, and an installation groove 814 is provided at the bottom of the rotating part 811. A push rod 815 is slidably connected inside the installation groove 814, and a spring 2 817 is fixedly installed inside the installation groove 814. The spring 2 817 is connected to the push rod 815. The inner bottom surface of the inner cavity 813 is rotatably connected to a rotating shaft 818, and a rotating rod 819 is fixedly connected to the outer side of the rotating shaft 818. A knocking block 820 is fixedly connected to the end of the rotating rod 819 close to the lower template 7, and a limiting plate 821 is symmetrically fixedly connected to the outer side of the lower template 7. A spring 3 822 is fixedly connected to the side of the limiting plate 821 close to the rotating rod 819.

[0052] The inner cavity 813 is opened in a ring shape, the mounting groove 814 is opened in an array, the inner top surface of the mounting groove 814 is fixedly connected with a top block 816, the top end of the spring 817 is fixedly connected to the top block 816, and the bottom end of the spring 817 is fixedly connected to the push rod 815.

[0053] The bottom of the push rod 815 is arranged in an arc shape. The number of the rotating rods 819 is the same as that of the push rod 815, and the rotating rods 819 are arranged in a horizontal direction.

[0054] Two limiting plates 821 are disposed on the outer side of each rotating rod 819 , and the rotating rod 819 is located on the inner side of two adjacent limiting plates 821 . One end of the spring three 822 away from the limiting plates 821 is fixedly connected to the rotating rod 819 .

[0055] Embodiment 1: Figure 1-Figure 9 As shown, a knocking assembly 8 is provided. By starting the hydraulic rod 4, the hydraulic rod 4 drives the pressure plate 81 to descend, and the pressure plate 81 drives the upper die 5 to press down through the sliding rod 82. The hydraulic rod 4 also drives the connecting plate 84 to descend, and the connecting plate 84 drives the cross plate 86 to descend. The cross plate 86 drives the ring 85 to slide on the vertical rod 2, and the cross plate 86 drives the rack 87 to press down. The upper die 5 first contacts and presses the lower mold plate 7, and the material is injected through the injection tube 6.

[0056] At this time, the hydraulic rod 4 continues to descend, the position of the upper die 5 remains unchanged, the pressure plate 81 slides on the slide bar 82 and compresses the spring 1 83. At this time, the rack 87 has just engaged with the gear 89. The rack 87 continues to descend to drive the gear 89 to rotate. The rotation of the gears 89 on both sides can drive the rotating part 811 to rotate, and the rotating part 811 drives the push rod 815 to rotate.

[0057] When the push rod 815 contacts the rotating rod 819, since the elastic coefficient of spring two 817 is greater than the elastic coefficient of spring three 822, the push rod 815 pushes the rotating rod 819 to rotate, and the rotating rod 819 compresses spring three 822, so that the knocking block 820 is separated from the lower template 7 and stuck on the side limit plate 821, and then the arc surface of the push rod 815 cooperates with the rotating rod 819, so that the push rod 815 is squeezed into the installation groove 814, and the push rod 815 compresses spring two 817.

[0058] When the push rod 815 is disengaged from the rotating rod 819, the spring two 817 drives the push rod 815 to reset, and the two spring three 822 drives the rotating rod 819 to reset, so that the knocking block 820 knocks on the lower template 7. As the rotating part 811 rotates, multiple knocking blocks 820 intermittently knock on the lower template 7, which is convenient for reducing the bubbles inside the plastic raw material inside the lower template 7, until the spring one 83 is compressed to the extreme, completing the injection molding operation, reducing the impact of bubbles in the production process, and after the injection molding is completed, the knocking block 820 will still knock intermittently, which is convenient for separating the plastic parts from the upper mold 5 and the lower template 7.

[0059] A cooling assembly 9 is provided on the outer side of the upper die 5, and the cooling assembly 9 includes a fixed rod 91, which is fixedly connected to the rotating member 811. A rotating ring 92 is rotatably connected to the outer side of the upper die 5, and the fixed rod 91 is fixedly installed with the rotating ring 92. A connecting pipe 94 is installed on the top of the rotating ring 92.

[0060] The fixed rods 91 are symmetrically arranged, the top of the rotating member 811 is fixedly connected to the bottom of the fixed rods 91, there are no less than two fixed rods 91, and the interior of the rotating ring 92 is fixedly connected with a connecting block 93, the connecting blocks 93 are symmetrically arranged, and the number of the connecting blocks 93 is the same as that of the fixed rods 91.

[0061] The connecting block 93 is slidably connected to the fixed rod 91 , and the connecting pipes 94 are symmetrically arranged. There are no less than two connecting pipes 94 . The upper part of the connecting pipe 94 is fixedly connected to the top plate 3 , and the bottom end of the connecting pipe 94 is connected to the rotating ring 92 .

[0062] A nozzle head 95 is fixedly mounted on the inner side of the rotating ring 92 . The nozzle head 95 is connected to the connecting pipe 94 through the rotating ring 92 . The nozzle head 95 is arranged in an array, and there are no less than six nozzle heads 95 .

[0063] Embodiment 2: Figure 10-11As shown, a cooling component 9 is provided. When the rotating member 811 rotates, the rotating member 811 will also drive the fixed rod 91 to rotate, the fixed rod 91 drives the connecting block 93 and the rotating ring 92 to rotate, the rotating ring 92 drives the nozzle head 95 to rotate, the connecting pipe 94 is connected to the external low-temperature gas generating device, and the connecting pipe 94 is a telescopic hose, which can adapt to the fewer turns of the rotating ring 92. After the injection molding is completed, the low-temperature gas is input into the rotating ring 92 through the connecting pipe 94, and then sprayed out by the nozzle head 95 at the bottom of the rotating ring 92 in a circle, so as to fully and evenly cool the outer sides of the upper die 5 and the lower die plate 7, thereby accelerating the rapid molding of the internal plastic parts and improving the efficiency of the injection molding process.

[0064] Through the cooperation of the knocking component 8 and the cooling component 9, it is convenient to drive the knocking block 820 to knock intermittently while pressing down, which reduces the generation of bubbles and facilitates the subsequent rapid cooling process, improves the injection molding effect, and solves the problem that bubbles may be generated inside the cavity during the injection molding process. If the bubbles are not handled, these bubbles will affect the injection molding effect, thereby affecting the quality of the final finished plastic parts.

[0065] Working principle: When using the device, first, Figure 1-Figure 11 As shown, by starting the hydraulic rod 4, the hydraulic rod 4 drives the pressure plate 81 to descend, and the pressure plate 81 drives the upper die 5 to be pressed downward through the slide bar 82. The hydraulic rod 4 also drives the connecting plate 84 to descend, and the connecting plate 84 drives the cross plate 86 to descend. The cross plate 86 drives the ring 85 to slide on the vertical rod 2, and the cross plate 86 drives the rack 87 to be pressed downward. The upper die 5 first contacts and presses with the lower mold plate 7, and the material is injected through the injection tube 6. At this time, the hydraulic rod 4 continues to descend, and the position of the upper die 5 does not change. The pressure plate 81 slides on the slide bar 82 and compresses the spring 1 83. At this time, the rack 87 is just engaged with the gear 89.

[0066] The rack 87 continues to descend and drives the gear 89 to rotate. The rotation of the gears 89 on both sides can drive the rotating part 811 to rotate. The rotating part 811 drives the pushing rod 815 to rotate. When the pushing rod 815 contacts the rotating rod 819, since the elastic coefficient of the spring two 817 is greater than the elastic coefficient of the spring three 822, the pushing rod 815 pushes the rotating rod 819 to rotate. The rotating rod 819 compresses the spring three 822, so that the knocking block 820 is separated from the lower template 7 and stuck on the side limit plate 821. Then the arc surface of the pushing rod 815 cooperates with the rotating rod 819, so that the pushing rod 815 is squeezed into the installation groove 814, and the pushing rod 815 compresses the spring two 817.

[0067] When the push rod 815 is disengaged from the rotating rod 819, the spring two 817 drives the push rod 815 to reset, and the two spring three 822 drives the rotating rod 819 to reset, so that the knocking block 820 knocks on the lower template 7. As the rotating part 811 rotates, multiple knocking blocks 820 intermittently knock on the lower template 7, which is convenient for reducing the bubbles inside the plastic raw material inside the lower template 7, until the spring one 83 is compressed to the extreme, completing the injection molding operation, reducing the impact of bubbles in the production process, and after the injection molding is completed, the knocking block 820 will still knock intermittently, which is convenient for separating the plastic parts from the upper mold 5 and the lower template 7.

[0068] When the rotating part 811 rotates, the rotating part 811 will also drive the fixed rod 91 to rotate, the fixed rod 91 drives the connecting block 93 and the rotating ring 92 to rotate, the rotating ring 92 drives the nozzle head 95 to rotate, the connecting pipe 94 is connected to the external low-temperature gas generating device, and the connecting pipe 94 is a telescopic hose, which can adapt to the fewer turns of the rotating ring 92. After the injection molding is completed, the low-temperature gas is input into the rotating ring 92 through the connecting pipe 94, and then sprayed out by the nozzle head 95 at the bottom of the rotating ring 92 in a circle, which is convenient for fully and evenly cooling the outer sides of the upper die 5 and the lower die plate 7, thereby accelerating the rapid molding of internal plastic parts and improving the efficiency of the injection molding process.

[0069] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0070] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. 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 mold for plastic injection molding, comprising a bottom plate (1) and vertical rods (2) symmetrically fixed around the top of the bottom plate (1), wherein the top ends of the vertical rods (2) are fixedly connected to the same top plate (3); It is characterized in that Also includes: A hydraulic rod (4) is symmetrically fixedly mounted inside the top plate (3), an upper die (5) is mounted below the top plate (3), an injection tube (6) is mounted on the top of the upper die (5), a lower die plate (7) is fixedly mounted in the middle of the top of the bottom plate (1), a knocking assembly (8) is arranged inside the lower die plate (7), and a cooling assembly (9) is arranged on the outside of the upper die (5); The knocking assembly (8) comprises a pressing plate (81), the bottom ends of the telescopic parts of the two hydraulic rods (4) are fixedly connected to the top of the pressing plate (81), the top of the upper die (5) is symmetrically fixedly connected with a sliding rod (82), the sliding rod (82) is slidably connected to the pressing plate (81), the outer side of the sliding rod (82) is sleeved with a spring 1 (83), one side of the telescopic part of the hydraulic rod (4) is fixedly connected with a connecting plate (84), the upper outer side of the vertical rod (2) is slidably connected with a ring (85), a horizontal plate (86) is fixedly connected between the two rings (85) on the same vertical line, and the connecting plate (84) is fixedly connected to the horizontal plate (86); A rack (87) is fixedly connected to the bottom of the horizontal plate (86), a mounting plate (88) is fixedly connected to the middle of the vertical rod (2) on one side, a gear (89) is rotatably connected to the side of the mounting plate (88) close to the rack (87), the rack (87) is meshingly connected to the gear (89), a fixing ring (810) is fixedly connected to the middle of the outer side of the lower template (7), a rotating member (811) is rotatably connected to the outer side of the lower template (7), a gear ring (812) is fixedly connected to the top array of the rotating member (811), and the gear (89) is meshingly connected to the gear ring (812); An inner cavity (813) is provided inside the fixed ring (810), a mounting groove (814) is provided at the bottom of the rotating member (811), a push rod (815) is slidably connected inside the mounting groove (814), a second spring (817) is fixedly installed inside the mounting groove (814), the second spring (817) is connected to the push rod (815), an inner bottom surface of the inner cavity (813) is rotatably connected to a rotating shaft (818), a rotating rod (819) is fixedly connected to the outer side of the rotating shaft (818), a knocking block (820) is fixedly connected to one end of the rotating rod (819) close to the lower template (7), a limiting plate (821) is symmetrically fixedly connected to the outer side of the lower template (7), and a third spring (822) is fixedly connected to the side of the limiting plate (821) close to the rotating rod (819); The cooling assembly (9) comprises a fixed rod (91), the fixed rod (91) being fixedly connected to a rotating member (811), a rotating ring (92) being rotatably connected to the outer side of the upper die (5), the fixed rod (91) being fixedly mounted to the rotating ring (92), and a connecting pipe (94) being mounted on the top of the rotating ring (92); A spray head (95) is fixedly mounted on the inner side of the rotating ring (92); the spray head (95) is connected to the connecting pipe (94) via the rotating ring (92); the spray heads (95) are arranged in an array, and there are no less than six spray heads (95).

2. A mold for plastic injection molding according to claim 1, characterized in that: There are no less than two slide bars (82), the spring one (83) is fixedly connected to the slide bar (82), the top end of the spring one (83) is fixedly connected to the pressure plate (81), and the bottom end of the spring one (83) is fixedly connected to the upper pressure die (5).

3. A mold for plastic injection molding according to claim 1, characterized in that: The injection molding tube (6) is slidably connected to the top plate (3), and the injection molding tube (6) is slidably connected to the pressing plate (81). Two mounting plates (88) are provided, and the mounting plates (88) are centrally symmetrically arranged. The bottom of the rotating member (811) is in contact with the top of the fixing ring (810), and the inner diameter of the rotating member (811) is greater than the outer diameter of the lower template (7).

4. A mold for plastic injection molding according to claim 1, characterized in that: The inner cavity (813) is opened in an annular shape, the mounting groove (814) is opened in an array, the inner top surface of the mounting groove (814) is fixedly connected with a top block (816), the top end of the second spring (817) is fixedly connected with the top block (816), and the bottom end of the second spring (817) is fixedly connected with the push rod (815).

5. A mold for plastic injection molding according to claim 1, characterized in that: The bottom of the push rod (815) is arranged in an arc shape, the number of the rotating rods (819) is the same as that of the push rods (815), and the rotating rods (819) are arranged in a transverse direction.

6. A mold for plastic injection molding according to claim 1, characterized in that: Two limiting plates (821) are arranged on the outer side of each rotating rod (819), the rotating rod (819) is located on the inner side of two adjacent limiting plates (821), and one end of the spring three (822) away from the limiting plates (821) is fixedly connected to the rotating rod (819).

7. A mold for plastic injection molding according to claim 1, characterized in that: The fixed rods (91) are symmetrically arranged, the top of the rotating member (811) is fixedly connected to the bottom of the fixed rods (91), there are no less than two fixed rods (91), and a connecting block (93) is fixedly connected inside the rotating ring (92), the connecting block (93) is symmetrically arranged, and the number of the connecting blocks (93) is the same as that of the fixed rods (91).

8. A mold for plastic injection molding according to claim 7, characterized in that: The connecting block (93) is slidably connected to the fixed rod (91), the connecting pipes (94) are symmetrically arranged, there are no less than two connecting pipes (94), the upper part of the connecting pipe (94) is fixedly connected to the top plate (3), and the bottom end of the connecting pipe (94) is connected to the rotating ring (92).

Images