High polymer material foam forming mold based on plunger transfer and cavity regulation and control method

Abstract

The invention relates to a foam forming mold, in particular to a high polymer material foam forming mold based on plunger transfer and a cavity regulation and control method. The device comprises a sealing assembly, the sealing assembly is used for sealing the space between a lower-layer mold and a cover plate, a jacking assembly is arranged in the lower-layer mold and used for jacking out a product in the lower-layer mold, and driving assemblies used for driving the cover plate to move up and down are arranged on the two sides, away from each other, of the lower-layer mold. The cover plate is driven by the two hydraulic rods to move downwards until a second sealing gasket on the lower side of the cover plate is attached to a plurality of layers of tooth blocks on the upper side of a first sealing gasket, and the tooth blocks and the second sealing gasket are attached to each other and then are meshed with each other to conduct multi-layer sealing between a lower-layer mold and the cover plate. And high polymer materials in the lower-layer mold are prevented from leaking due to a gap between the lower-layer mold and the cover plate.

Description

Technical Field

[0001] The invention relates to a foaming molding die, in particular to a polymer material foaming molding die based on plunger transfer and a cavity control method. Background Art

[0002] Polymer materials are a type of material with polymer compounds as basic components. When making polymer products, they need to be formed with the help of foaming molding molds. The plunger transfer foaming molding mold is a special mold that uses the mechanical thrust of the plunger to inject the polymer melt containing the foaming agent into the mold cavity through the transfer channel and complete the foaming and shaping in the cavity.

[0003] In order to ensure the quality, production efficiency and safety of foamed products, the mold needs to be strictly sealed before the polymer material is injected into the foaming molding mold. Existing molds mostly use flat flanges or stepped surfaces for sealing (such as direct bonding of the parting surface). However, the melt pressure is unevenly distributed during the foaming process, and flat bonding cannot completely offset the gas side pressure, which can easily form leakage channels locally, resulting in leakage of the polymer material in the mold. In addition, some existing molds have large internal roughness. When the polymer material is foamed and molded inside the mold, the bubbles are easily attached to the inner wall of the mold, causing the product to stick to the inner wall of the mold. The currently commonly used demolding method is to directly eject the product from the inside of the mold. When the product is ejected, the part where the product and the mold are adhered is prone to tearing, causing damage to the surface of the product. In view of this, we propose a polymer material foaming molding mold and cavity control method based on plunger transfer. Summary of the Invention

[0004] The purpose of the present invention is to provide a polymer foaming molding die based on plunger transfer and a cavity control method to solve the problems raised in the above background technology: 1. Most existing foaming molds are not tightly sealed, which can easily lead to leakage of polymer materials in the mold; 2. When the internal roughness of the mold is large, the product is easy to stick to the inner wall of the mold, and the product is easy to tear during demoulding.

[0005] To achieve the above-mentioned objectives, one of the objectives of the present invention is to provide a polymer material foaming molding mold based on plunger transfer, comprising a base, a lower mold fixedly arranged on the upper side of the base, a cover plate arranged on the upper side of the lower mold, a sealing assembly arranged between the lower mold and the cover plate, the sealing assembly being used to seal between the lower mold and the cover plate, a jacking assembly being arranged inside the lower mold, the jacking assembly being used to eject the product inside the lower mold, both sides of the lower mold away from each other being provided with driving assemblies for driving the cover plate to move up and down, an extrusion assembly being arranged inside the lower mold, the extrusion assembly being used to extrude the four sides of the product inside the lower mold, and the driving assembly drives the extrusion assembly to extrude the four sides of the product inside the lower mold while driving the cover plate to move upward and drives the lifting assembly to eject the product inside the lower mold.

[0006] After the cover plate moves to the upper side of the lower mold, the sealing assembly seals the gap between the lower mold and the cover plate. After the polymer material inside the lower mold is injection molded, the two driving assemblies drive the cover plate to move upward and drive the extrusion assembly to extrude the four sides of the product inside the lower mold, so that the product inside the lower mold is separated from the inner wall of the lower mold, preventing the part of the product inside the lower mold that is adhered to the inner wall of the lower mold from tearing when being ejected. Then the driving assembly drives the lifting assembly to eject the product inside the lower mold.

[0007] As a further improvement of the present technical solution, the sealing assembly includes multiple No. 1 sealing gaskets, and the multiple No. 1 sealing gaskets are respectively arranged on the upper side of the four sides of the lower mold. The No. 1 sealing gasket is a multi-step stepped design. A tooth block is fixedly provided on the upper side of each layer of gasket of the No. 1 sealing gasket, and a No. 2 sealing gasket matching the No. 1 sealing gasket is fixedly provided on the lower side of the cover plate. A tooth groove matching the tooth block is provided on the lower side of the No. 2 sealing gasket. A clamping block is fixedly provided on the lower side of each layer of gasket of the No. 1 sealing gasket, and a clamping groove matching the clamping block is provided on the upper side of the lower mold.

[0008] When using this device, the user first inserts the card block into the card slot on the upper side of the lower mold to fix the No. 1 sealing gasket on the upper side of the lower mold. When the No. 2 sealing gasket contacts the tooth block, the tooth block and the No. 2 sealing gasket engage with each other. At this time, a closed space is formed between the lower mold and the cover plate to prevent the polymer material inside the lower mold from leaking from the gap between the lower mold and the cover plate.

[0009] As a further improvement of the present technical solution, the lifting assembly includes multiple top blocks, a sealing ring is provided on the outside of the top block, and the multiple top blocks and sealing rings are evenly arranged inside the lower mold. The interior of the lower mold is provided with a groove matching the top block and the sealing ring, the side wall of the top block is in contact with the inner wall of the sealing ring, and the top block and the sealing ring are flush with the bottom plate of the lower mold.

[0010] The sealing ring is used to prevent the polymer material inside the lower mold from penetrating into the gap between the top block and the bottom plate of the lower mold. When the top block moves upward, it pushes the product inside the lower mold and ejects the product inside the lower mold.

[0011] As a further improvement of the present technical solution, a support rod is fixedly provided on the lower side of the top block, a sliding rod is provided on the lower side of the support rod, one end of the sliding rod is slidably provided inside the support rod, the diameter of the lower half of the sliding rod is the same as that of the support rod, and a No. 1 tension spring is fixedly provided symmetrically on the left and right sides of the lower side of the top block, and the middle of the sealing ring and the lower mold are provided with grooves matching the support rod and the No. 1 tension spring, and a pad is fixedly provided on the lower side of the sliding rod, and the lower ends of the sliding rod and the No. 1 tension spring are fixedly connected to the pad, and the pad is provided on the lower side of the base, and the middle of the base is provided with a groove matching the sliding rod and the No. 1 tension spring.

[0012] The support rod is used to drive the top block to move up and down. The No. 1 tension spring is used to pull the top block down to the inside of the sealing ring before injecting the polymer material into the lower mold to prevent the polymer material from penetrating between the top block and the sealing ring. The pad drives the sliding rod and the support rod to move up and down when moving up and down.

[0013] As a further improvement of the present technical solution, the driving assembly includes a hydraulic rod, and the two hydraulic rods are symmetrically fixed on the lower side of the base. One end of the hydraulic rod piston rod is fixedly connected to one side of the cover plate, and connecting rods are provided on both sides of the hydraulic rods away from each other. One end of the connecting rod is fixedly connected to the cover plate, and the other end of the connecting rod is fixedly connected to the pad. When the cover plate moves, the connecting rod drives the pad to move along with the cover plate.

[0014] The hydraulic rod drives the cover plate to move up and down when it is started. When the cover plate moves, it drives the connecting rod to move, and at the same time, the connecting rod drives the pad to move.

[0015] As a further improvement of the present technical solution, the extrusion assembly includes multiple extrusion plates, a sealing strip is provided on the outer side of the extrusion plate, and the four sides of the extrusion plate are in contact with the inner wall of the sealing strip. The multiple extrusion plates and sealing strips are respectively arranged in the inner wall of the lower mold, and the extrusion plates and sealing strips are flush with the inner wall of the lower mold. A push rod is fixedly provided on one side of the extrusion plate, and the push rod slides through one side of the lower mold. One end of the push rod is provided on the outer side of the lower mold, and the lower side of the push rod at one end of the outer side of the lower mold is an inclined surface. A No. 2 tension spring is fixedly provided on the side of the sealing strip close to the push rod, and the No. 2 tension spring is provided on the outer side of the push rod. The No. 2 tension spring is fixedly provided on the inside of the side wall of the lower mold, and the No. 2 tension spring is used to pull the extrusion plate toward the side close to the inner wall of the lower mold.

[0016] When the push rod moves toward the interior of the lower mold, it drives the extrusion plate to move to the inner wall of the lower mold and extrude the product inside the lower mold, so that the product on the inner wall of the lower mold is separated from the inner wall of the lower mold. Then the No. 2 tension spring pulls the extrusion plate to the side of the sealing strip again to prevent the extrusion plate from blocking the demoulding of the product on the inner wall of the lower mold.

[0017] As a further improvement of the present technical solution, a push plate is provided on the lower side of the extrusion plate, and the push plate is slidably provided on the outside of the lower mold. The push plate is used to press the push rod toward the inside of the lower mold. A plurality of protrusions are fixedly provided on the side of the push plate away from the lower mold, and the plurality of protrusions are respectively provided on one side of a plurality of connecting rods, and the upper side of the protrusion is a slope.

[0018] The push plate is used to press the push rod toward the interior of the lower mold. When the push plate slides upward, it gradually contacts the inclined surface of the lower end of the push rod and pushes the push rod toward the interior of the lower mold.

[0019] As a further improvement of the present technical solution, a pushing assembly is provided on the side of the connecting rod close to the protrusion, and the pushing assembly includes a fixed block, which is fixedly provided on one side of the connecting rod, and a supporting block is provided on the side of the fixed block close to the protrusion, and a pushing block is fixedly provided on the side of the supporting block close to the protrusion, and the pushing block is used to push the protrusion, and the lower side of the pushing block is an inclined surface matching the inclined surface of the upper side of the protrusion, and a damper for supporting the support block is fixedly provided symmetrically between the fixed block and the supporting block.

[0020] When the push block slides downward to the upper side of the protrusion, the protrusion squeezes the push block. Under the squeezing of the protrusion, the damper contracts and drives the support block to move to the side away from the protrusion. Then the support block drives the push block to continue to move downward. Then the damper pushes the support block to the side close to the protrusion. The push block is pushed to the lower side of the protrusion again. When the cover moves upward, it drives the connecting rod and the pushing assembly upward. During the upward movement of the pushing assembly, the upper side of the push block gradually contacts the lower side of the protrusion and pushes the protrusion upward.

[0021] A second object of the present invention is to provide a cavity control method for operating the above-mentioned polymer foaming mold based on plunger transfer, comprising the following method steps: S1. The cover plate is moved downward by operating two hydraulic rods until the No. 2 sealing gasket on the underside of the cover plate engages with the multiple teeth on its underside to seal the gap between the lower mold and the cover plate. A closed space is formed between the lower mold and the cover plate. The plunger pump is then started to inject polymer material into the interior of the lower mold. S2. After the polymer material inside the lower mold is foamed and formed, the two hydraulic rods are operated again to drive the cover plate to move upward. When the cover plate moves upward, it drives one end of the connecting rod and the push assembly to move upward. After the push block contacts the protrusion, it pushes the protrusion upward and drives the push plate to slide upward. During the upward sliding process, the push plate gradually contacts the No. 2 tension spring and presses the No. 2 tension spring toward the interior of the lower mold. The No. 2 tension spring drives the extrusion plate to squeeze the side wall of the product inside the lower mold, separating the side wall of the product inside the lower mold from the inner wall of the lower mold. S3. While the push rod drives the extrusion plate to press the product inside the lower mold, the push plate continues to slide upward. After the push plate passes the push rod, the No. 2 tension spring immediately pulls the extrusion plate back to its initial position. Then, the two hydraulic rods continue to operate to drive the cover plate and the connecting rod to move upward. At this time, the connecting rod drives the pad to move upward, and the pad drives multiple ejector blocks to eject the product inside the lower mold.

[0022] Compared with the prior art, the present invention has the following beneficial effects: 1. In the raw material stirring device and use method for the production of waterproofing agent, the cover plate is driven downward by two hydraulic rods until the No. 2 sealing gasket on the lower side of the cover plate is fitted with the multi-layer tooth block on the upper side of the No. 1 sealing gasket. After the tooth block and the No. 2 sealing gasket are fitted, they mesh with each other and perform multi-layer sealing between the lower mold and the cover plate to prevent the gap between the lower mold and the cover plate from causing leakage of the polymer material inside the lower mold.

[0023] 2. In the raw material stirring device and usage method for the production of waterproofing agent, when the connecting rod moves downward, it drives the push block to push the protrusion upward. At the same time, the protrusion drives the push plate to slide upward. When the push plate passes the push rod, it presses the push rod against the inside of the lower mold. At the same time, the push rod drives the extrusion plate to squeeze the side wall of the product inside the lower mold to separate the product inside the lower mold from the inner wall of the lower mold, preventing the part where the product inside the lower mold is adhered to the inner wall of the lower mold from tearing when the product inside the lower mold is ejected, thereby improving the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the lower mold and outer side structure of the cover plate of the present invention; Figure 3 This is a schematic structural diagram of the sealing assembly of the present invention; Figure 4 This is an exploded schematic diagram of the sealing assembly and lower mold structure of the present invention; Figure 5 Schematic diagram of the internal structure of the lower mold of the present invention; Figure 6 It is a bottom view of the overall structure of the present invention; Figure 7 It is a schematic structural diagram of the jacking assembly of the present invention; Figure 8 It is a partial structural diagram of the jacking assembly of the present invention; Figure 9 It is a schematic structural diagram of the driving assembly and the extrusion assembly of the present invention; Figure 10 For the present invention Figure 9 A magnified view of the structure at center A; Figure 11 This is a schematic diagram of the structure of the propulsion component of the present invention; Figure 12 It is a partial structural schematic diagram of the extrusion assembly of the present invention.

[0025] The meaning of each number in the figure is: 1. Base; 2. Lower mold; 3. Cover plate; 4. Sealing assembly; 41. No. 1 sealing gasket; 42. Tooth block; 43. No. 2 sealing gasket; 44. Clamping block; 5. Lifting assembly; 51. Lifting block; 52. Sealing ring; 53. Support rod; 54. Sliding rod; 55. Tension spring No. 1; 56. Backing plate; 6. Driving assembly; 61. Hydraulic rod; 62. Connecting rod; 63. Pushing assembly; 631. Fixed block; 632. Support block; 633. Pushing block; 634. Damper; 7. Extrusion assembly; 71. Extrusion plate; 72. Sealing strip; 73. Push rod; 74. No. 2 tension spring; 75. Push plate; 76. Bump; 8. Telescopic rod; 9. Plunger pump. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined. Example

[0029] See also Figure 1 As shown, one of the purposes of this embodiment is to provide a polymer material foaming molding mold based on plunger transfer, including a base 1, a lower mold 2 is fixedly provided on the upper side of the base 1, a cover plate 3 is provided on the upper side of the lower mold 2, and a plurality of telescopic rods 8 for supporting the cover plate 3 are fixedly provided around the cover plate 3. The plurality of telescopic rods 8 are respectively provided at the corners of the cover plate 3, and the telescopic rods 8 are fixedly provided on the upper side of the base 1. When the cover plate 3 moves up and down, the telescopic rods 8 extend and retract with the cover plate 3 to prevent the cover plate 3 from shaking when moving up and down.

[0030] See also Figure 1-Figure 4As shown, a sealing assembly 4 is provided between the lower mold 2 and the cover plate 3. The sealing assembly 4 is used to seal between the lower mold 2 and the cover plate 3. The sealing assembly 4 includes a plurality of No. 1 sealing gaskets 41. The plurality of No. 1 sealing gaskets 41 are respectively provided on the upper side of the four sides of the lower mold 2. The No. 1 sealing gaskets 41 are multi-step stepped design. A card block 44 is fixedly provided on the lower side of each layer of gasket of the No. 1 sealing gasket 41. A card slot matching the card block 44 is provided on the upper side of the lower mold 2. When using the device, the user first inserts the card block 44 into the card slot on the upper side of the lower mold 2 so that the No. 1 sealing gasket 41 is fixedly installed on the upper side of the lower mold 2.

[0031] See also Figure 1-Figure 5 As shown, a tooth block 42 is fixedly provided on the upper side of each layer of gasket 41 of No. 1, and a tooth block 42 is fixedly provided on the lower side of cover plate 3 to match with the tooth block 42 of No. 1. The lower side of the No. 2 gasket 43 is provided with a tooth groove that matches with the tooth block 42. When the No. 2 gasket 43 contacts the tooth block 42, the tooth block 42 and the No. 2 gasket 43 engage with each other. At this time, a closed space is formed between the lower mold 2 and the cover plate 3. The two sides of the lower mold 2 away from each other are provided with a tooth block for driving the cover plate 3 to move up and down. The driving assembly 6 includes a hydraulic rod 61. Two hydraulic rods 61 are symmetrically fixed on the lower side of the base 1. One end of the piston rod of the hydraulic rod 61 is fixedly connected to one side of the cover plate 3. After the No. 1 sealing gasket 41 is installed, the user drives the cover plate 3 downward by operating the two hydraulic rods 61 until the No. 2 sealing gasket 43 and the tooth block 42 contact each other and seal the lower mold 2 and the cover plate 3 to prevent the polymer material inside the lower mold 2 from leaking from the gap between the lower mold 2 and the cover plate 3.

[0032] See also Figure 1 As shown, a plunger pump 9 is fixedly provided on one side of the base 1, and a pipe is fixedly connected between the plunger pump 9 and the lower mold 2. After the lower mold 2 and the cover plate 3 are docked, the user connects the pipe for conveying the polymer material to the feed port of the plunger pump 9. Then the user starts the plunger pump 9 to convey the polymer material mixed with the foaming agent to the interior of the lower mold 2 through the pipe between the plunger pump 9 and the lower mold 2 until the polymer material fills the interior of the lower mold 2, and then the polymer material is gradually foamed and formed inside the lower mold 2.

[0033] See also Figure 2-Figure 10As shown, an extrusion assembly 7 is provided inside the lower mold 2, and the extrusion assembly 7 is used to extrude the four sides of the product inside the lower mold 2. The extrusion assembly 7 includes multiple extrusion plates 71. In order to prevent the polymer material inside the lower mold 2 from penetrating into the gap between the extrusion plate 71 and the inner wall of the lower mold 2, a sealing strip 72 is provided on the outer side of the extrusion plate 71. The four sides of the extrusion plate 71 are all in contact with the inner wall of the sealing strip 72. Multiple extrusion plates 71 and sealing strips 72 are respectively arranged in the inner wall of the lower mold 2. In order to ensure that the side wall of the polymer material inside the lower mold 2 remains flat after molding, the extrusion plates 71 and the sealing strips 72 are flush with the inner wall of the lower mold 2.

[0034] See also Figure 2-Figure 10 As shown, a push plate 75 is provided on the lower side of the extrusion plate 71, and the push plate 75 is slidably provided on the outside of the lower mold 2. Connecting rods 62 are provided on both sides of the hydraulic rod 61 away from each other, and the connecting rods 62 can be extended and retracted. One end of the connecting rod 62 is fixedly connected to the cover plate 3, and the cover plate 3 drives one end of the connecting rod 62 to move when it moves up and down. A plurality of protrusions 76 are fixedly provided on the side of the push plate 75 away from the lower mold 2, and the plurality of protrusions 76 are respectively provided on one side of the plurality of connecting rods 62. A pushing assembly 63 is provided on the side of the connecting rod 62 close to the protrusion 76. When the cover plate 3 moves downward, it drives one end of the connecting rod 62 and the pushing assembly 63 to slide downward.

[0035] See also Figure 2-Figure 11 As shown, the pushing assembly 63 includes a fixed block 631, which is fixedly arranged on one side of the connecting rod 62, and a supporting block 632 is provided on the side of the fixed block 631 close to the protrusion 76, and a pushing block 633 is fixedly provided on the side of the supporting block 632 close to the protrusion 76. The initial position of the pushing block 633 is located on the upper side of the protrusion 76, and the pushing block 633 is used to push the protrusion 76. The upper side of the protrusion 76 is an inclined surface, and the lower side of the pushing block 633 is an inclined surface that matches the inclined surface of the upper side of the protrusion 76. The pushing block 633 slides downward to the protrusion When the protrusion 76 is on the upper side, the protrusion 76 squeezes the push block 633, and a damper 634 for supporting the support block 632 is fixedly arranged symmetrically between the fixed block 631 and the support block 632. Under the squeezing of the protrusion 76, the damper 634 contracts and drives the support block 632 to move to the side away from the protrusion 76, and then the support block 632 drives the push block 633 to continue to move downward, and then the damper 634 pushes the support block 632 to the side close to the protrusion 76, and the push block 633 is pushed to the lower side of the protrusion 76 again.

[0036] See also Figure 2-Figure 12When the locking cam 73 is in the unlocked position, the locking cam 73 is in the unlocked position, and the locking cam 73 is in the unlocked position, so that the locking cam 73 is locked and the locking cam 73 is in the unlocked position.

[0037] See also Figure 10-12 As shown, a No. 2 tension spring 74 is fixedly provided on the side of the sealing strip 72 close to the push rod 73. The No. 2 tension spring 74 is provided on the outside of the push rod 73. The No. 2 tension spring 74 is fixedly provided on the inside of the side wall of the lower mold 2. The No. 2 tension spring 74 is used to pull the extrusion plate 71 toward the side close to the inner wall of the lower mold 2. When the push plate 75 passes the push rod 73 and stops pushing the push rod 73, the No. 2 tension spring 74 pulls the extrusion plate 71 to the inside of the sealing strip 72 again to prevent the extrusion plate 71 from blocking the demoulding of the product on the inner wall of the lower mold 2.

[0038] See also Figures 1-8 As shown, a lifting assembly 5 is provided inside the lower mold 2, and the lifting assembly 5 is used to eject the product inside the lower mold 2. The driving assembly 6 drives the extrusion assembly 7 to squeeze the surrounding of the product inside the lower mold 2 while driving the cover plate 3 to move upward, and drives the lifting assembly 5 to eject the product inside the lower mold 2. The lifting assembly 5 includes a plurality of ejecting blocks 51. When the plurality of ejecting blocks 51 move upward, the product inside the lower mold 2 is pushed upward. In order to prevent the polymer material inside the lower mold 2 from penetrating into the ejecting blocks, In the gap between the top block 51 and the bottom plate of the lower mold 2, a sealing ring 52 is provided on the outside of the top block 51, and multiple top blocks 51 and sealing rings 52 are evenly arranged inside the lower mold 2. The interior of the lower mold 2 is provided with grooves matching the top block 51 and the sealing ring 52, and the side wall of the top block 51 fits with the inner wall of the sealing ring 52. In order to prevent the part of the lower mold 2 that contacts the top block 51 and the sealing ring 52 from being uneven, the top block 51 and the sealing ring 52 are flush with the bottom plate of the lower mold 2.

[0039] See also Figure 7-Figure 8As shown, a support rod 53 is fixedly provided on the lower side of the top block 51, and a slide rod 54 is provided on the lower side of the support rod 53. One end of the slide rod 54 is slidably provided inside the support rod 53. In order to ensure that the support rod 53 and the slide rod 54 can slide freely between the lower mold 2 and the sealing ring 52, the diameter of the lower half of the slide rod 54 is the same as that of the support rod 53. A No. 1 tension spring 55 is fixedly provided on the lower side of the top block 51 symmetrically. The sealing ring 52 and the lower mold 2 are both provided with grooves matching the support rod 53 and the No. 1 tension spring 55. The No. 1 tension spring 55 is used to pull the top block 51 downward to the inside of the sealing ring 52 before injecting the polymer material into the lower mold 2 to prevent the polymer material from penetrating between the top block 51 and the sealing ring 52.

[0040] See also Figure 6-Figure 8 As shown, a pad 56 is fixedly provided on the lower side of the slide rod 54, and the lower ends of the slide rod 54 and the No. 1 tension spring 55 are fixedly connected to the pad 56. The pad 56 is used to support multiple slide rods 54 and the No. 1 tension spring 55 and drive multiple top blocks 51 to move up and down. The pad 56 is arranged on the lower side of the base 1, and a slot matching the slide rod 54 and the No. 1 tension spring 55 is opened in the middle of the base 1. The other end of the connecting rod 62 is fixedly connected to the pad 56. When the cover plate 3 moves, the connecting rod 62 drives the pad 56 to move along with the cover plate 3. When the cover plate 3 moves downward, it drives the connecting rod 62 to move downward. At the same time, the connecting rod 62 pulls the pad 56 downward, and the pad 56 pulls the slide rod 54 downward and pulls one end of the slide rod 54 out from the inside of the support rod 53. At this time, the No. 1 tension spring 55 pulls the top block 51 downward to the inside of the sealing ring 52.

[0041] See also Figures 1-9 As shown, when the cover plate 3 moves upward, it drives the connecting rod 62 to pull the pad 56 upward, and at the same time the pad 56 pushes the slide rod 54 upward, and one end of the slide rod 54 gradually slides to the inside of the support rod 53. The length of the slide rod 54 at one end inside the support rod 53 is the same as the distance between the initial position of the push plate 75 and the push rod 73. When the push plate 75 passes the push rod 73, one end of the slide rod 54 slides completely to the inside of the support rod 53. At this time, the slide rod 54 drives the support rod 53 to push the top block 51 upward and drives the top block 51 to eject the product inside the lower mold 2. At this time, the user transfers the ejected product for storage.

[0042] The second purpose of this embodiment is to provide a method for controlling the cavity of a polymer foaming mold based on plunger transfer, comprising the following steps: S1. The cover plate 3 is moved downward by operating the two hydraulic rods 61 until the second sealing gasket 43 on the lower side of the cover plate 3 engages with the multiple tooth blocks 42 on its lower side to seal the gap between the lower mold 2 and the cover plate 3. A closed space is formed between the lower mold 2 and the cover plate 3. The plunger pump 9 is then started to inject the polymer material into the interior of the lower mold 2. S2. After the polymer material inside the lower mold 2 is foamed and formed, the two hydraulic rods 61 are operated again to drive the cover plate 3 to move upward. While the cover plate 3 moves upward, it drives one end of the connecting rod 62 and the pushing assembly 63 to move upward. After the push block 633 contacts the protrusion 76, it pushes the protrusion 76 upward and drives the push plate 75 to slide upward. During the upward sliding process, the push plate 75 gradually contacts the No. 2 tension spring 74 and presses the No. 2 tension spring 74 toward the interior of the lower mold 2. The No. 2 tension spring 74 drives the extrusion plate 71 to squeeze the side wall of the product inside the lower mold 2 so that the side wall of the product inside the lower mold 2 is separated from the inner wall of the lower mold 2. S3, while the push rod 73 drives the extrusion plate 71 to press the product inside the lower mold 2, the push plate 75 continues to slide upward. After the push plate 75 passes the push rod 73, the No. 2 tension spring 74 immediately pulls the extrusion plate 71 back to its initial position, and then continues to operate the two hydraulic rods 61 to drive the cover plate 3 and the connecting rod 62 to move upward. At this time, the connecting rod 62 drives the pad 56 to move upward, and the pad 56 drives multiple ejector blocks 51 to eject the product inside the lower mold 2.

[0043] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A polymer material foaming molding die based on plunger transfer, comprising a base (1), a lower mold (2) fixedly provided on the upper side of the base (1), and a cover plate (3) provided on the upper side of the lower mold (2), characterized in that: A sealing assembly (4) is provided between the lower mold (2) and the cover plate (3), and the sealing assembly (4) is used to seal between the lower mold (2) and the cover plate (3); A lifting assembly (5) is provided inside the lower mold (2), and the lifting assembly (5) is used to eject the product inside the lower mold (2); Both sides of the lower mold (2) that are away from each other are provided with drive components (6) for driving the cover plate (3) to move up and down; An extrusion assembly (7) is provided inside the lower mold (2), and the extrusion assembly (7) is used to extrude the surroundings of the product inside the lower mold (2). The driving assembly (6) drives the cover plate (3) to move upward while driving the extrusion assembly (7) to extrude the surroundings of the product inside the lower mold (2) and drives the lifting assembly (5) to eject the product inside the lower mold (2).

2. The polymer foaming molding die based on plunger transfer according to claim 1, characterized in that: The sealing assembly (4) includes a plurality of No. 1 sealing gaskets (41), and the plurality of No. 1 sealing gaskets (41) are respectively arranged on the upper side of the four sides of the lower mold (2). The No. 1 sealing gaskets (41) are of a multi-step stepped design. A tooth block (42) is fixedly provided on the upper side of each layer of the No. 1 sealing gasket (41). A No. 2 sealing gasket (43) matching the No. 1 sealing gasket (41) is fixedly provided on the lower side of the cover plate (3). A tooth groove matching the tooth block (42) is provided on the lower side of the No. 2 sealing gasket (43). A clamping block (44) is fixedly provided on the lower side of each layer of the No. 1 sealing gasket (41), and a clamping groove matching the clamping block (44) is provided on the upper side of the lower mold (2).

3. The polymer foaming molding die based on plunger transfer according to claim 1, characterized in that: The lifting assembly (5) includes a plurality of top blocks (51), and a sealing ring (52) is provided on the outer side of the top block (51). The plurality of top blocks (51) and the sealing ring (52) are evenly arranged inside the lower mold (2). The interior of the lower mold (2) is provided with a notch matching the top blocks (51) and the sealing ring (52). The side wall of the top block (51) fits with the inner wall of the sealing ring (52), and the top block (51) and the sealing ring (52) are both flush with the bottom plate of the lower mold (2).

4. The polymer foaming molding die based on plunger transfer according to claim 3, characterized in that: A support rod (53) is fixedly provided on the lower side of the top block (51), and a slide rod (54) is provided on the lower side of the support rod (53). One end of the slide rod (54) is slidably provided inside the support rod (53). The diameter of the lower half of the slide rod (54) is the same as that of the support rod (53). A tension spring (55) is fixedly provided on the lower side of the top block (51) in a left-right symmetrical manner. The middle of the sealing ring (52) and the lower mold (2) are provided with slots matching the support rod (53) and the tension spring (55). A pad (56) is fixedly provided on the lower side of the slide rod (54). The lower ends of the slide rod (54) and the tension spring (55) are fixedly connected to the pad (56). The pad (56) is provided on the lower side of the base (1). The middle of the base (1) is provided with a slot matching the slide rod (54) and the tension spring (55).

5. The polymer foaming molding die based on plunger transfer according to claim 1, characterized in that: The driving assembly (6) includes a hydraulic rod (61), wherein two hydraulic rods (61) are fixedly arranged on the lower side of the base (1) in a left-right symmetrical manner, one end of the piston rod of the hydraulic rod (61) is fixedly connected to one side of the cover plate (3), and connecting rods (62) are provided on both sides of the hydraulic rod (61) that are away from each other, one end of the connecting rod (62) is fixedly connected to the cover plate (3), and the other end of the connecting rod (62) is fixedly connected to the backing plate (56), and when the cover plate (3) moves, the connecting rod (62) drives the backing plate (56) to move along with the cover plate (3).

6. The polymer foaming molding die based on plunger transfer according to claim 5, characterized in that: The extrusion assembly (7) includes a plurality of extrusion plates (71), the outer side of the extrusion plate (71) is provided with a sealing strip (72), the four sides of the extrusion plate (71) are all in contact with the inner wall of the sealing strip (72), the plurality of extrusion plates (71) and the sealing strip (72) are respectively provided in the inner wall of the lower mold (2), the extrusion plates (71) and the sealing strip (72) are all flush with the inner wall of the lower mold (2), and a push rod (73) is fixedly provided on one side of the extrusion plate (71), and the push rod (73) is slidably inserted into the lower mold ( 2), one end of the push rod (73) is arranged on the outside of the lower mold (2), and the lower side of the push rod (73) located on the outside of the lower mold (2) is an inclined surface, and a second tension spring (74) is fixedly arranged on the side of the sealing strip (72) close to the push rod (73), and the second tension spring (74) is arranged on the outside of the push rod (73). The second tension spring (74) is fixedly arranged inside the side wall of the lower mold (2), and the second tension spring (74) is used to pull the extrusion plate (71) toward the side close to the inner wall of the lower mold (2).

7. The polymer foaming molding die based on plunger transfer according to claim 6, characterized in that: A push plate (75) is provided on the lower side of the extrusion plate (71), and the push plate (75) is slidably provided on the outer side of the lower mold (2). The push plate (75) is used to press the push rod (73) toward the inside of the lower mold (2). A plurality of protrusions (76) are fixedly provided on the side of the push plate (75) away from the lower mold (2). The plurality of protrusions (76) are respectively provided on one side of the plurality of connecting rods (62), and the upper side of the protrusions (76) is an inclined surface.

8. The polymer foaming molding die based on plunger transfer according to claim 7, characterized in that: A pushing assembly (63) is provided on a side of the connecting rod (62) close to the protrusion (76), and the pushing assembly (63) includes a fixed block (631), the fixed block (631) is fixedly provided on one side of the connecting rod (62), a supporting block (632) is provided on a side of the fixing block (631) close to the protrusion (76), and a pushing block (633) is fixedly provided on a side of the supporting block (632) close to the protrusion (76), and the pushing block (633) is used to push the protrusion (76), and the lower side of the pushing block (633) is an inclined surface that matches the upper inclined surface of the protrusion (76), and a damper (634) for supporting the supporting block (632) is fixedly provided symmetrically between the fixing block (631) and the supporting block (632).

9. The polymer foaming molding die based on plunger transfer according to claim 1, characterized in that: A plurality of telescopic rods (8) for supporting the cover plate (3) are fixedly arranged around the cover plate (3), and the plurality of telescopic rods (8) are respectively arranged at the corners of the cover plate (3). The telescopic rods (8) are fixedly arranged on the upper side of the base (1). A plunger pump (9) is fixedly arranged on one side of the base (1), and a pipeline is fixedly connected between the plunger pump (9) and the lower mold (2).

10. A method for controlling the cavity of a polymer foaming mold based on plunger transfer according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1. The cover plate (3) is driven downward by operating the two hydraulic rods (61) until the second sealing gasket (43) on the lower side of the cover plate (3) and the multiple tooth blocks (42) on the lower side thereof engage with each other to seal the gap between the lower mold (2) and the cover plate (3), thereby forming a closed space between the lower mold (2) and the cover plate (3). Subsequently, the plunger pump (9) is started to inject the polymer material into the interior of the lower mold (2); S2. After the polymer material inside the lower mold (2) is foamed and formed, the two hydraulic rods (61) are operated again to drive the cover plate (3) to move upward. When the cover plate (3) moves upward, it drives one end of the connecting rod (62) and the pushing assembly (63) to move upward. After the push block (633) contacts the protrusion (76), it pushes the protrusion (76) upward and drives the push plate (75) to slide upward. During the upward sliding process, the push plate (75) gradually contacts the second tension spring (74) and presses the second tension spring (74) toward the inside of the lower mold (2). The second tension spring (74) drives the extrusion plate (71) to squeeze the side wall of the product inside the lower mold (2) so that the side wall of the product inside the lower mold (2) is separated from the inner wall of the lower mold (2). S3, the push rod (73) drives the extrusion plate (71) to press the product inside the lower mold (2) while the push plate (75) continues to slide upward. After the push plate (75) passes the push rod (73), the second tension spring (74) immediately pulls the extrusion plate (71) back to the initial position, and then continues to operate the two hydraulic rods (61) to drive the cover plate (3) and the connecting rod (62) to move upward. At this time, the connecting rod (62) drives the pad (56) to move upward, and the pad (56) drives multiple ejector blocks (51) to eject the product inside the lower mold (2).

Images