A stable and sealed pet product injection mold and injection molding process

Abstract

The present invention discloses a stable and sealed pet product injection mold and an injection molding process. The present invention relates to the field of injection mold technology, including a template, the template is fixedly connected to a guide column, a through slot is opened in the middle of the top of the template, a fixing ring is fixedly connected to the inner wall of the through slot, a card block is fixedly connected to the inner wall of the through slot, the card block is hook-shaped, there are two cards, two of the cards are symmetrically arranged inside the through slot, a positioning ring is fixedly connected to the bottom of the module, and a protrusion is provided inside the positioning ring. This stable and sealed pet product injection mold and injection molding process, through the card connection between the card slot and the card block, makes the lower mold and the upper mold fit tightly and seal, avoids the existence of a gap when the mold is closed, resulting in quality problems of the product, and requires additional processing and inspection, thereby extending the injection molding cycle, which will reduce production efficiency and increase production costs.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to a stable and sealed pet product injection mold and an injection molding process. Background Art

[0002] With the rapid development of the plastics industry and the continuous improvement of the strength of general and engineering plastics, the application scope of plastic products is also expanding, and the amount of plastic products is also increasing. In the processing of plastic toys, mold injection molding is usually used to manufacture them. Injection molds are a tool for producing plastic products; they are also tools that give plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the high-pressure injection of heated and melted plastic into the mold cavity by the injection molding machine, and after cooling and solidification, a molded product is obtained.

[0003] With existing injection molds, friction occurs between the parting surfaces every time the mold is opened and closed. As time goes by, the parting surfaces will gradually wear out, resulting in gaps when the mold is closed, affecting the quality of the product. At the same time, plastic liquid will continue to flow out after use, causing waste, and it is easy to accumulate at the injection port, causing blockage during injection molding, affecting the work efficiency and quality of injection molding. Summary of the invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a stable and sealed pet product injection mold and injection molding process, comprising a fixed plate, the top of which is fixedly connected with a guide column, the number of the guide columns is four, the guide columns are located at the corners of the fixed plate, and the end of the guide column away from the fixed plate is slidably connected with a square plate;

[0005] A demoulding assembly, wherein the demoulding assembly is fixedly mounted on the top of the fixed plate, and the guide pillar passes through the demoulding assembly;

[0006] A lower mold, the lower mold is fixedly mounted on the top of the demoulding assembly;

[0007] An upper die, the upper die being slidably mounted on the outer side of the guide pillar and being located above the lower die;

[0008] A pouring assembly, which is fixedly mounted at the top middle of the square plate, and which penetrates the square plate and extends to the interior of the upper mold;

[0009] Wherein, the lower mold includes a template, the template is fixedly connected to the guide column, a through groove is opened in the middle of the top of the template, a fixing ring is fixedly connected to the inner wall of the through groove, a clamping block is fixedly connected to the inner wall of the through groove, and the clamping block is elastic. The mold is installed to make the upper mold and the lower mold close together. At this time, the clamping block on the lower mold and the clamping groove on the limit ring are adapted through the clamping connection between the clamping groove and the clamping block, so that the lower mold and the upper mold are tightly fitted and sealed, avoiding the existence of a gap when closing the mold, resulting in quality problems of the product, requiring additional processing and inspection, thereby extending the injection molding cycle, which will reduce production efficiency and increase production costs. The clamping block is hook-shaped, and there are two of the clamping blocks, which are symmetrically arranged inside the through groove;

[0010] The upper mold includes a mold base, a module is fixedly connected to the middle of the bottom of the mold base, the module and the template are located on the same vertical plane, a limiting ring is fixedly connected to the bottom of the module, a slot is provided on the outer side of the limiting ring, and the card block is located inside the slot.

[0011] Preferably, the top of the fixing ring is a recessed V-shaped setting, and the bottom of the limiting ring is a convex V-shaped setting. The fixing ring and the limiting ring are adapted to each other. Through the sliding adaptation between the fixing ring and the limiting ring, the friction and impact of the mold in the process of opening and closing the mold can be reduced, the wear of the mold parts can be reduced, and the service life of the mold can be extended. At the same time, it can also prevent the upper mold and the lower mold from being misaligned during mold closing, and damage to the mold due to collision can be avoided. A support block is fixedly connected to the middle of the through groove, and the support block is cross-shaped. A connecting pipe is fixedly connected to the outside of the template, and a channel is opened inside the template, and the channel is located on the outside of the through groove. A connecting hole is opened at the bottom of the channel, and the connecting pipe is connected to the channel through the connecting hole. A circular hole is opened on the inner wall of the through groove, and the circular hole is located on the side of the fixing ring away from the support block.

[0012] Preferably, a positioning ring is fixedly connected to the bottom of the module, and the positioning ring is located inside the limiting ring. A convex block is provided inside the positioning ring, and the positioning ring is slidably adapted to the supporting block through the convex block. A water pipe is fixedly connected to the outside of the module, and a cavity is opened inside the positioning ring. The channel is consistent with the shape of the product. A temperature difference is prone to occur between the inside and outside of a thick product during the cooling process. Due to the limitation of heat conduction, the heat inside the product is difficult to dissipate quickly, while the surface cools relatively quickly. This temperature difference will cause greater thermal stress inside the product, which will cause defects such as warping and cracking. During the injection molding process, water is passed through the connecting pipe and the water pipe, and water enters the inside of the channel through the connecting pipe and the connecting hole. The water flows along both sides of the channel to heat the outer surface of the product. Cooling, the water carrying heat is discharged from another connecting pipe, and the water inside the water pipe enters the cavity to cool the inner wall of the product. By cooling the inner and outer sides of the product at the same time, the cooling time is greatly shortened. At the same time, uniform cooling can reduce the thermal stress inside the product and reduce the probability of defects such as warping and deformation. Since the inner and outer sides are cooled at the same time, the temperature changes of various parts of the product are more uniform, avoiding uneven shrinkage caused by excessive temperature differences. The cavity is connected with the water pipe, and a main channel is opened in the middle of one side of the module close to the mold base, and a branch channel is opened on the outer side of the bottom of the main channel. There are two branch channels, and the two branch channels are symmetrically arranged with the main channel as the center. A circular groove is opened inside the module, and the circular groove is connected with the cavity.

[0013] Preferably, the demoulding assembly includes a vertical plate, which is fixedly connected to the top of the fixed plate, and the top of the fixed plate is fixedly connected to the bottom plate. There are two vertical plates, and the two vertical plates are symmetrically arranged with the bottom plate as the center. A guide rod is fixedly connected to the top side of the bottom plate. After injection molding is completed, the fixed plate drives the lower mold and the demoulding assembly to leave the upper mold. At this time, the push rod pushes the plastic product out of the through groove of the lower mold under the push of the bottom plate. By arranging multiple push rods, the push rods are evenly distributed inside the through groove and the limit ring, so that the pushing force applied to the plastic product during the demoulding process is more uniform, which can avoid problems such as product deformation, rupture or stress concentration caused by excessive local force. The guide rod is slidably connected to the template, and a push rod is fixedly connected to the middle of the top of the bottom plate. The push rod is located inside the circular hole, and the push rod is slidably connected to the template. A spring is fixedly connected to the side of the bottom plate close to the guide rod, and the spring is fixedly connected to the bottom of the template away from the bottom plate.

[0014] Preferably, the pouring assembly includes a pouring tube, which is fixedly connected to the middle of the top of the square plate, a round rod is arranged inside the pouring tube, and a spiral plate is fixedly connected to the outer side of the round rod, the spiral plate is located inside the pouring tube, and the outer side of the spiral plate is adapted to the inner wall of the pouring tube, and a rotating plate is rotatably connected to the bottom of the pouring tube, and water enters the inside of the circular groove through the water pipe. Under the flow of water, the arc plate is forced to rotate, and the arc plate drives the round rod to rotate, and the round rod drives the spiral plate to rotate. The injection molded plastic has good fluidity in the molten state. As the spiral plate feeds downward, the rotating motion of the spiral plate makes the molten plastic feed evenly, reducing defects in the product, reducing temperature differences and composition non-uniformity in the melt, and when the speed of the cooling water flow is accelerated, the temperature inside the mold is reduced. Since the viscosity of the plastic melt usually increases with the decrease in temperature, the round rod drives the spiral plate to rotate faster, thereby increasing the injection flow rate, thereby being able to maintain To ensure sufficient plasticization and uniformity of the plastic melt, there are multiple rotating plates, and the multiple rotating plates are evenly distributed with the round rod as the center. The rotating plate is fixedly connected to the side of the rotating plate away from the casting tube, and a spring plate is arranged on the outer side of the round rod near the rotating plate. In the initial state, the multiple rotating plates form a disc, so that a sealed space is formed with the bottom of the casting tube. When the round rod rotates, the spring plate on the outer side of the round rod contacts with the rotating plate, so that the rotating plate is rotated by force, so that the molten plastic moves downward through the gap between the rotating plate and the casting tube. The rotation speed of the round rod becomes faster, and the centrifugal force on the spring plate becomes larger, so that the rotation angle of the rotating plate becomes larger, and then the gap between the rotating plate and the casting tube becomes larger, so that the injection flow rate becomes larger. The end of the elastic rope away from the rotating plate is fixedly connected to the inner wall of the main channel, the round rod penetrates the module and extends to the inside of the circular groove, the outer side of the round rod is fixedly connected to an arc plate, and the arc plate is located inside the circular groove. The outer side of the round rod near the diversion channel is fixedly connected with a scraper.

[0015] An injection molding process for a stable and sealed pet product includes the following steps:

[0016] S1. Install the mold, and move the upper mold downward on the outside of the guide pillar to close the upper mold and the lower mold. At this time, the clamping block on the lower mold is clamped and adapted with the clamping groove on the limit ring;

[0017] S2, injection molding plastic, the molten plastic enters the mold through the pouring pipe, and enters the upper mold and lower mold through the main runner and the branch runner;

[0018] S3, cooling the product, connecting the pipe and the water pipe to pass water, cooling the inside and outside of the product at the same time, greatly shortening the cooling time;

[0019] S4, the product is demoulded, and the fixed plate drives the lower mold and the demoulding assembly to leave the upper mold. At this time, the push rod pushes the plastic product out of the through groove of the lower mold under the push of the bottom plate.

[0020] The present invention provides a stable and sealed pet product injection mold and injection molding process.

[0021] Beneficial effects:

[0022] 1. A stable and sealed pet product injection mold and injection molding process, through the card connection between the card slot and the card block, makes the lower mold and the upper mold fit tightly and seal, avoiding the existence of gaps when the molds are closed, resulting in product quality problems, requiring additional processing and inspection, thereby extending the injection molding cycle, which will reduce production efficiency and increase production costs.

[0023] 2. This stable and sealed pet product injection mold and injection molding process can reduce the friction and impact of the mold during the opening and closing process through the sliding adaptation between the fixing ring and the limit ring, reduce the wear of the mold parts, and extend the service life of the mold. At the same time, it can also prevent the upper mold and the lower mold from being misaligned during the closing of the mold, avoiding damage to the mold due to collision.

[0024] 3. This stable and sealed pet product injection mold and injection molding process can greatly shorten the cooling time by cooling the inner and outer sides of the product at the same time. At the same time, uniform cooling can reduce the thermal stress inside the product and reduce the probability of defects such as warping and deformation. Since the inner and outer sides are cooled at the same time, the temperature changes of various parts of the product are more uniform, avoiding uneven shrinkage caused by excessive temperature differences.

[0025] 4. A stable and sealed pet product injection mold and injection molding process, by arranging multiple push rods, which are evenly distributed inside the through groove and the limit ring, makes the pushing force on the plastic product during the demolding process more uniform, which can avoid problems such as product deformation, rupture or stress concentration due to excessive local force.

[0026] 5. A stable and sealed pet product injection mold and injection molding process, through the rotation of the spiral plate, the molten plastic is evenly discharged, the defects in the product are reduced, and the temperature difference and composition non-uniformity in the melt are reduced. When the speed of the cooling water flow is increased, the temperature inside the mold is reduced. Since the viscosity of the plastic melt usually increases with the decrease in temperature, the round rod drives the spiral plate to rotate faster, thereby increasing the injection flow rate, thereby ensuring sufficient plasticization and uniformity of the plastic melt. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the external structure of a stable and sealed pet product injection mold of the present invention;

[0028] Figure 2 It is a schematic diagram of the local structure of the present invention;

[0029] Figure 3It is a schematic diagram of the structure of the demoulding component of the present invention;

[0030] Figure 4 This is a schematic diagram of the lower mold structure of the present invention;

[0031] Figure 5 It is a schematic diagram of the cross-sectional structure of the lower mold of the present invention;

[0032] Figure 6 It is a schematic diagram of the upper mold structure of the present invention;

[0033] Figure 7 It is a schematic diagram of the cross-sectional structure of the upper mold of the present invention;

[0034] Figure 8 It is a schematic diagram of the cross-sectional structure of the upper mold of the present invention;

[0035] Fig. 9 For the present invention Figure 7 The structure diagram of the enlarged figure at A in the middle;

[0036] Fig.10 Schematic diagram of the injection molding process of the present invention.

[0037] In the figure: 1. fixed plate; 2. demoulding assembly; 21. vertical plate; 22. bottom plate; 23. spring; 24. guide rod; 25. push rod; 3. lower mold; 31. template; 32. through groove; 33. fixing ring; 34. block; 35. support block; 36. connecting pipe; 37. channel; 38. round hole; 39. connecting hole; 4. upper mold; 41. mold base; 42. module; 43. limit ring; 44. positioning ring; 45. cavity; 46. slot; 47. branch channel; 48. water pipe; 49. main channel; 410. round groove; 5. square plate; 6. casting assembly; 61. casting pipe; 62. round rod; 63. spiral plate; 64. rotating plate; 65. elastic rope; 66. scraper; 67. arc plate; 7. guide column. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0039] The first embodiment, as Figures 1 to 8As shown, the present invention provides a technical solution: a stable and sealed pet product injection mold, comprising a fixed plate 1, a guide column 7 is fixedly connected to the top of the fixed plate 1, the number of the guide columns 7 is four, the guide columns 7 are located at the corners of the fixed plate 1, and the end of the guide column 7 away from the fixed plate 1 is slidably connected to a square plate 5;

[0040] The demoulding assembly 2 is fixedly mounted on the top of the fixed plate 1, and the guide pillar 7 passes through the demoulding assembly 2;

[0041] The lower mold 3 is fixedly mounted on the top of the demoulding assembly 2;

[0042] The upper die 4 is slidably mounted on the outer side of the guide pillar 7, and the upper die 4 is located above the lower die 3;

[0043] A pouring assembly 6 is fixedly mounted at the top middle of the square plate 5 , and the pouring assembly 6 penetrates the square plate 5 and extends to the interior of the upper mold 4 ;

[0044] The lower mold 3 includes a template 31, which is fixedly connected to the guide column 7. A through groove 32 is provided in the middle of the top of the template 31. A fixing ring 33 is fixedly connected to the inner wall of the through groove 32. A clamping block 34 is fixedly connected to the inner wall of the through groove 32. The clamping block 34 is elastic. The mold is installed to close the upper mold 4 and the lower mold 3. At this time, the clamping block 34 on the lower mold 3 and the clamping groove 46 on the limit ring 43 are adapted to the clamping connection between the clamping groove 46 and the clamping block 34, so that the lower mold 3 and the upper mold 4 are tightly fitted and sealed, avoiding the existence of a gap when closing the mold, resulting in quality problems of the product, requiring additional processing and inspection, thereby extending the injection molding cycle, which will reduce production efficiency and increase production costs. The clamping block 34 is hook-shaped, and there are two clamping blocks 34, which are symmetrically arranged inside the through groove 32.

[0045] The upper mold 4 includes a mold base 41, and a module 42 is fixedly connected to the middle of the bottom of the mold base 41. The module 42 and the template 31 are located on the same vertical plane. The bottom of the module 42 is fixedly connected to a limit ring 43, and a slot 46 is provided on the outer side of the limit ring 43. The block 34 is located inside the slot 46.

[0046] The second embodiment is based on the first embodiment. Figures 4 to 8As shown, the top of the fixing ring 33 is a concave V-shaped setting, and the bottom of the limiting ring 43 is a convex V-shaped setting. The fixing ring 33 and the limiting ring 43 are adapted to each other. Through the sliding adaptation between the fixing ring 33 and the limiting ring 43, the friction and impact of the mold in the process of opening and closing the mold can be reduced, the wear of the mold parts can be reduced, and the service life of the mold can be extended. At the same time, it can also prevent the upper mold 4 and the lower mold 3 from being misaligned during mold closing, and avoid damage to the mold due to collision. A support block 35 is fixedly connected to the middle of the through groove 32, and the support block 35 is a cross setting. A connecting pipe 36 is fixedly connected to the outer side of the template 31. A channel 37 is opened inside the template 31, and the channel 37 is located on the outer side of the through groove 32. A connecting hole 39 is opened at the bottom of the channel 37, and the connecting pipe 36 is connected to the channel 37 through the connecting hole 39. A circular hole 38 is opened on the inner wall of the through groove 32, and the circular hole 38 is located on the side of the fixing ring 33 away from the support block 35.

[0047] A positioning ring 44 is fixedly connected to the bottom of the module 42, and the positioning ring 44 is located inside the limit ring 43. A convex block is provided inside the positioning ring 44, and the positioning ring 44 is slidably adapted to the support block 35 through the convex block. A water pipe 48 is fixedly connected to the outside of the module 42, and a cavity 45 is provided inside the positioning ring 44. The channel 37 is consistent with the shape of the product. The inside and outside of thick products are prone to temperature differences during the cooling process. Due to the limitation of heat conduction, the heat inside the product is difficult to dissipate quickly, while the surface cools relatively quickly. This temperature difference will cause greater thermal stress inside the product, which will cause defects such as warping and cracking. During the injection molding process, water is passed through the connecting pipe 36 and the water pipe 48, and the water enters the inside of the channel 37 through the connecting pipe 36 and the connecting hole 39. The water flows along both sides of the channel 37 to cool the outer surface of the product. However, the water carrying heat is discharged from another connecting pipe 36, and at the same time, the water in the water pipe 48 enters the cavity 45 to cool the inner wall of the product. By cooling the inner and outer sides of the product at the same time, the cooling time is greatly shortened. At the same time, uniform cooling can reduce the thermal stress inside the product and reduce the probability of defects such as warping and deformation. Since the inner and outer sides are cooled at the same time, the temperature changes of various parts of the product are more uniform, avoiding uneven shrinkage caused by excessive temperature differences. The cavity 45 is connected to the water pipe 48, and a main channel 49 is opened in the middle of one side of the module 42 close to the mold base 41, and a branch channel 47 is opened on the outer side of the bottom of the main channel 49. There are two branch channels 47, and the two branch channels 47 are symmetrically arranged with the main channel 49 as the center. A circular groove 410 is opened in the module 42, and the circular groove 410 is connected to the cavity 45.

[0048] The third embodiment is based on the first and second embodiments. Figures 2 to 3As shown, the demoulding assembly 2 includes a vertical plate 21, which is fixedly connected to the top of the fixed plate 1, and the top of the fixed plate 1 is fixedly connected to a bottom plate 22. There are two vertical plates 21, and the two vertical plates 21 are symmetrically arranged with the bottom plate 22 as the center. A guide rod 24 is fixedly connected to the top side of the bottom plate 22. After the injection molding is completed, the fixed plate 1 drives the lower mold 3 and the demoulding assembly 2 to leave the upper mold 4. At this time, the push rod 25 pushes the plastic product out of the through groove 32 of the lower mold 3 under the push of the bottom plate 22. By arranging multiple push rods 25, the push rods 25 are evenly distributed. Inside the through groove 32 and the limit ring 43, the pushing force applied to the plastic product during the demolding process is more uniform, which can avoid problems such as product deformation, rupture or stress concentration caused by excessive local force. The guide rod 24 is slidably connected to the template 31, and a push rod 25 is fixedly connected to the middle of the top of the bottom plate 22. The push rod 25 is located inside the circular hole 38. The push rod 25 is slidably connected to the template 31. A spring 23 is fixedly connected to the side of the bottom plate 22 close to the guide rod 24, and the spring 23 is fixedly connected to the bottom of the template 31 away from the bottom plate 22.

[0049] For the fourth embodiment, please refer to Figures 7 to 10As shown, the pouring assembly 6 includes a pouring pipe 61, which is fixedly connected to the middle of the top of the square plate 5. A round rod 62 is arranged inside the pouring pipe 61, and a spiral plate 63 is fixedly connected to the outer side of the round rod 62. The spiral plate 63 is located inside the pouring pipe 61, and the outer side of the spiral plate 63 is adapted to the inner wall of the pouring pipe 61. The bottom of the pouring pipe 61 is rotatably connected to a rotating plate 64. Water enters the inside of the circular groove 410 through the water pipe 48. Under the flow of water, the arc plate 67 is rotated by force, and the arc plate 67 drives the round rod 62 to rotate, and the round rod 62 drives The screw plate 63 rotates, and the injection molding plastic has good fluidity in the molten state. As the screw plate 63 is fed downward, the rotation of the screw plate 63 makes the molten plastic evenly fed, reducing defects in the product, reducing temperature differences and component non-uniformity in the melt. When the cooling water flow speed is increased, the temperature inside the mold is reduced. Since the viscosity of the plastic melt usually increases with the decrease in temperature, the round rod 62 drives the screw plate 63 to rotate faster, thereby increasing the injection flow rate, thereby ensuring sufficient plastic melt. In order to ensure uniformity and uniformity, there are multiple rotating plates 64, which are evenly distributed around the round rod 62. The side of the rotating plate 64 away from the casting tube 61 is fixedly connected with an elastic rope 65. The round rod 62 is provided with an elastic plate on the outer side of the rotating plate 64. In the initial state, the multiple rotating plates 64 form a disc, so that a sealed space is formed with the bottom of the casting tube 61. When the round rod 62 rotates, the elastic plate on the outer side of the round rod 62 contacts the rotating plate 64, so that the rotating plate 64 is rotated by force, so that the molten plastic passes through the rotating plate 64 and the casting tube 61. The gap between the rotating plate 64 and the pouring tube 61 increases, so that the injection flow rate increases. The end of the elastic rope 65 away from the rotating plate 64 is fixedly connected to the inner wall of the main channel 49. The round rod 62 passes through the module 42 and extends to the inside of the circular groove 410. The outer side of the round rod 62 is fixedly connected to an arc plate 67, and the arc plate 67 is located inside the circular groove 410. The outer side of the round rod 62 is fixedly connected to a scraper 66 near the outside of the diversion channel 47.

[0050] An injection molding process for a stable and sealed pet product includes the following steps:

[0051] S1, install the mold, the upper mold 4 moves downward on the outer side of the guide pillar 7, so that the upper mold 4 and the lower mold 3 are molded together, and the clamping block 34 on the lower mold 3 is clamped and adapted with the clamping groove 46 on the limit ring 43;

[0052] S2, injection molding plastic, the molten plastic enters the mold through the pouring pipe 61, and enters the upper mold 4 and the lower mold 3 through the main flow channel 49 and the branch flow channel 47;

[0053] S3, cooling the product, connecting pipe 36 and water pipe 48 to pass water, cooling the inside and outside of the product at the same time, greatly shortening the cooling time;

[0054] S4, the product is demoulded. The fixed plate 1 drives the lower mold 3 and the demoulding assembly 2 to leave the upper mold 4. At this time, the push rod 25 pushes the plastic product out of the through groove 32 of the lower mold 3 under the push of the bottom plate 22.

[0055] When in use, the mold is installed so that the upper mold 4 and the lower mold 3 are closed. At this time, the block 34 on the lower mold 3 and the groove 46 on the limit ring 43 are adapted to each other through the clamping connection between the groove 46 and the block 34, so that the lower mold 3 and the upper mold 4 are tightly fitted and sealed to avoid gaps when the molds are closed. At this time, the molten plastic enters the mold through the pouring tube 61, and enters the interior of the upper mold 4 and the lower mold 3 through the main channel 49 and the branch channel 47.

[0056] The channel 37 is consistent with the shape of the product. A temperature difference is likely to occur between the inside and outside of a thick product during the cooling process. Due to the limitation of heat conduction, the heat inside the product is difficult to dissipate quickly, while the surface cools relatively quickly. This temperature difference will cause greater thermal stress inside the product, which will in turn cause defects such as warping and cracking. During the injection molding process, water flows through the connecting pipe 36 and the water pipe 48. The water enters the inside of the channel 37 through the connecting pipe 36 and the connecting hole 39. The water flows along both sides of the channel 37 to cool the outer surface of the product. The water carrying heat is discharged from the other connecting pipe 36. At the same time, the water inside the water pipe 48 enters the inside of the cavity 45 to cool the inner wall of the product. By cooling both the inside and outside of the product at the same time, the cooling time is greatly shortened. After the injection molding is completed, the fixed plate 1 drives the lower mold 3 and the demolding assembly 2 to leave the upper mold 4. At this time, the push rod 25 pushes the plastic product out of the through groove 32 of the lower mold 3 under the push of the bottom plate 22.

[0057] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A stable and sealed pet product injection mold, characterized in that: include: A fixed plate (1), wherein a guide column (7) is fixedly connected to the top of the fixed plate (1), the guide columns (7) are four in number, the guide columns (7) are located at the corners of the fixed plate (1), and the ends of the guide columns (7) away from the fixed plate (1) are slidably connected to a square plate (5); A demoulding assembly (2), wherein the demoulding assembly (2) is fixedly mounted on the top of the fixed plate (1), and the guide column (7) passes through the demoulding assembly (2); A lower mold (3), wherein the lower mold (3) is fixedly mounted on the top of the demoulding assembly (2); An upper die (4), wherein the upper die (4) is slidably mounted on the outer side of the guide pillar (7), and the upper die (4) is located above the lower die (3); A casting assembly (6), wherein the casting assembly (6) is fixedly mounted at the middle of the top of the square plate (5), and the casting assembly (6) penetrates the square plate (5) and extends to the interior of the upper mold (4); The lower mold (3) comprises a template (31), the template (31) is fixedly connected to the guide column (7), a through slot (32) is provided in the middle of the top of the template (31), a fixing ring (33) is fixedly connected to the inner wall of the through slot (32), a clamping block (34) is fixedly connected to the inner wall of the through slot (32), the clamping block (34) is elastic, the clamping block (34) is hook-shaped, there are two clamping blocks (34), and the two clamping blocks (34) are symmetrically arranged inside the through slot (32); The upper mold (4) comprises a mold base (41), a module (42) is fixedly connected to the middle of the bottom of the mold base (41), the module (42) and the template (31) are located on the same vertical plane, a limiting ring (43) is fixedly connected to the bottom of the module (42), a clamping groove (46) is provided on the outer side of the limiting ring (43), the clamping block (34) is located inside the clamping groove (46), a main flow channel (49) is provided in the middle of one side of the module (42) close to the mold base (41), a branch flow channel (47) is provided on the outer side of the bottom of the main flow channel (49), and a circular groove (410) is provided inside the module (42); The pouring assembly (6) comprises a pouring pipe (61), the pouring pipe (61) is fixedly connected to the middle of the top of the square plate (5), a round rod (62) is arranged inside the pouring pipe (61), a spiral plate (63) is fixedly connected to the outer side of the round rod (62), the spiral plate (63) is located inside the pouring pipe (61), the outer side of the spiral plate (63) is adapted to the inner wall of the pouring pipe (61), and a rotating plate (64) is rotatably connected to the bottom of the pouring pipe (61); the number of the rotating plates (64) is multiple, and the multiple rotating plates (64) are arranged in a plurality of positions. The round rods (62) are evenly distributed in the center. The side of the rotating plate (64) away from the pouring pipe (61) is fixedly connected to an elastic rope (65). The end of the elastic rope (65) away from the rotating plate (64) is fixedly connected to the inner wall of the main channel (49). The round rod (62) passes through the module (42) and extends to the inside of the circular groove (410). The outer side of the round rod (62) is fixedly connected to an arc plate (67). The arc plate (67) is located inside the circular groove (410). The outer side of the round rod (62) close to the branch channel (47) is fixedly connected to a scraper (66).

2. A stable and sealed pet product injection mold according to claim 1, characterized in that: The top of the fixing ring (33) is in a concave V-shape, the bottom of the limiting ring (43) is in a convex V-shape, the fixing ring (33) and the limiting ring (43) are adapted to each other, a support block (35) is fixedly connected to the middle of the through groove (32), the support block (35) is in a cross shape, a connecting pipe (36) is fixedly connected to the outer side of the template (31), and a channel (37) is provided inside the template (31).

3. The stable and sealed pet product injection mold according to claim 2, characterized in that: The channel (37) is located outside the through groove (32); a communicating hole (39) is provided at the bottom of the channel (37); the connecting pipe (36) is connected to the channel (37) through the communicating hole (39); a circular hole (38) is provided on the inner wall of the through groove (32); and the circular hole (38) is located on a side of the fixing ring (33) away from the supporting block (35).

4. The stable and sealed pet product injection mold according to claim 3, characterized in that: A positioning ring (44) is fixedly connected to the bottom of the module (42), the positioning ring (44) is located inside the limiting ring (43), a protrusion is provided inside the positioning ring (44), the positioning ring (44) is slidably matched with the support block (35) through the protrusion, and a water pipe (48) is fixedly connected to the outside of the module (42), a cavity (45) is opened inside the positioning ring (44), and the cavity (45) is connected to the water pipe (48).

5. The stable and sealed pet product injection mold according to claim 4, characterized in that: There are two branch flow channels (47), and the two branch flow channels (47) are symmetrically arranged with the main flow channel (49) as the center. The circular groove (410) is connected to the cavity (45).

6. The stable and sealed pet product injection mold according to claim 1, characterized in that: The demoulding assembly (2) comprises a vertical plate (21), wherein the vertical plate (21) is fixedly connected to the top of the fixed plate (1), and the top of the fixed plate (1) is fixedly connected to a bottom plate (22). There are two vertical plates (21), and the two vertical plates (21) are symmetrically arranged with the bottom plate (22) as the center. A guide rod (24) is fixedly connected to the top side of the bottom plate (22).

7. The stable and sealed pet product injection mold according to claim 6, characterized in that: The guide rod (24) is slidably connected to the template (31), a push rod (25) is fixedly connected to the middle of the top of the base plate (22), the push rod (25) is located inside the circular hole (38), the push rod (25) is slidably connected to the template (31), a spring (23) is fixedly connected to the side of the base plate (22) close to the guide rod (24), and the spring (23) is fixedly connected to the bottom of the template (31) away from the base plate (22).

8. The injection molding process of the injection mold for a stable and sealed pet product according to any one of claims 1 to 7, characterized in that: It includes the following steps: S1, installing the mold, the upper mold (4) moves downward on the outer side of the guide pillar (7), so that the upper mold (4) and the lower mold (3) are molded together, and at this time, the clamping block (34) on the lower mold (3) is clamped and adapted with the clamping groove (46) on the limit ring (43); S2, injection molding plastic, the molten plastic enters the mold through the pouring pipe (61), and enters the interior of the upper mold (4) and the lower mold (3) through the main flow channel (49) and the branch flow channel (47); S3, cooling the product, connecting the pipe (36) and the water pipe (48) to pass water, cooling the inside and outside of the product at the same time, greatly shortening the cooling time; S4, the product is demoulded, the fixed plate (1) drives the lower mold (3) and the demoulding assembly (2) to leave the upper mold (4), and at this time, the push rod (25) pushes the plastic product out of the through groove (32) of the lower mold (3) under the push of the bottom plate (22).

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