Foam packaging box forming mold with internal specification convenient to adjust

Abstract

The invention relates to the technical field of foam packaging box production, in particular to a foam packaging box forming mold convenient for adjusting internal specifications, which comprises a base frame, a mold frame I and a mold frame II, the base frame is an assembly carrier of the forming mold, and the mold frame I and the mold frame II are fixedly assembled at the top of the base frame at an interval; the middle of the first mold frame is an annular opening, and the middle of the second mold frame is a square opening used for forming a foam box. The bottom plate piece is embedded in the square opening of the mold frame II and is used for shaping the bottom surface of the foam box. The mold plate on the sliding plate is controlled through the air cylinder, forming frames of different forming specifications can be dynamically adjusted, foam boxes of various specifications can be produced through the mold, the liquid bag frame is matched to be tightly attached to the mold plate in the expansion state, it is ensured that the bottom of the foam box is flat and smooth in the hot press forming process, and therefore the quality of finished products is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of foam packing box production, and more particularly to a foam packing box forming mold that is convenient for adjusting internal specifications. Background Art

[0002] A foam packing box generally refers to a packaging container made of polystyrene (EPS), polyurethane (PU), or other foamed plastics. Due to its light weight, shock resistance, heat preservation and other characteristics, foam packing boxes are widely used in the packaging of items in many fields such as electronic products, glass products, and food. With the development of diverse market demands, the flexibility requirements for the internal specifications (such as size, partition layout, etc.) of foam packing boxes are getting higher and higher.

[0003] Upon retrieval, the utility model with the authorization announcement number CN220576464U discloses a forming mold for foam box production, including a bottom plate. A support frame is fixedly installed on the top of the bottom plate. Four telescopic rods are bolted to the top of the bottom plate. A female mold is fixedly installed between the tops of the telescopic rods. A ejector rod sleeved inside the female mold is fixedly installed on the top of the bottom plate. This forming mold realizes rapid cooling and demoulding through mechanisms such as an electric push rod and a cooling system. However, due to the lack of adjustment function of the mold itself, the flexibility of use is limited. When facing temporary changes in product specifications or a diverse product line, enterprises have to customize a new set of molds to meet different production requirements, which will not only increase additional costs, but also the process of replacing the mold may lead to an extended downtime of the production line, thus affecting the overall production capacity. Summary of the Invention

[0004] In order to overcome the above-mentioned disadvantages of the prior art, the present invention provides a foam packing box forming mold that is convenient for adjusting internal specifications.

[0005] Technical solution: A foam packing box forming mold that is convenient for adjusting internal specifications, including a base frame, a mold frame one, and a mold frame two. The base frame is the assembly carrier of this forming mold. The mold frame one and the mold frame two are fixedly assembled at intervals on the top of the base frame. The middle of the mold frame one is an annular opening, and the middle of the mold frame two is a square opening for forming a foam box. It also includes a bottom plate member embedded in the square opening of the mold frame two. The bottom plate member is used to shape the bottom surface of the foam box. The middle part of the side of the mold frame one facing the mold frame two is fixedly connected with a sealing plate with a through hole. The side of the sealing plate facing away from the mold frame two is fixedly connected with a mounting seat. The mounting seat is located in the annular opening of the mold frame one. A hot pressing block is slidably mounted on the mounting seat. The shape of the through hole of the sealing plate is the same as that of the hot pressing block. A slide rail is provided on the circumferential frame of the side of the mold frame one facing the mold frame two. An adjusting mechanism for adjusting the forming specifications of the foam box is provided on the mold frame one. The adjusting mechanism includes: sliding plates, four of which are respectively slidably mounted on the slide rails on the four sides of the mold frame one. Rollers are mounted on the sliding plates, and the rollers are slidably matched with the corresponding slide rails. A cylinder is fixedly mounted on the sliding plate. A mold plate is fixedly mounted on the piston rod of the cylinder. A connecting frame is fixedly provided on one side of the mold plate. Adjacent two mold plates are slidably connected through the connecting frame. The four mold plates are slidably spliced end to end through the connecting frame to form a square forming frame. One side surface of the four mold plates is slidably and hermetically attached to the sealing plate, and the other side surface of the four mold plates is slidably attached to the bottom plate member. Among them, a feeding valve for docking and adding cured EPS raw material pipe is mounted on the top mold plate.

[0006] Furthermore, the bottom plate member includes a liquid sac frame and a hard plate. The liquid sac frame is fixedly embedded at the square opening of the mold frame two. The liquid sac frame is an elastic sac with one side open. The side of the liquid sac frame facing the mold plate is stretchable. When the side of the liquid sac frame is fully expanded, it can fit flatly against the side of the mold plate. A hard plate is fixedly mounted at the opening of the liquid sac frame. The liquid sac frame and the hard plate form a sac that can expand and contract. A hydraulic mechanism for expanding the liquid sac frame is provided on the mold frame two. Before adjusting the forming specifications of the mold plate by the cylinder, the liquid sac frame is in a contracted state and does not fit against the mold plate, so that the mold plate can be flexibly adjusted in forming specifications.

[0007] Furthermore, the hydraulic mechanism includes a liquid storage box fixedly mounted on the top of the mold frame two. The liquid storage box stores hydraulic oil for expanding the liquid sac frame. A liquid pump is fixedly mounted on the top of the mold frame two. The inlet of the liquid pump is connected to the inside of the liquid storage box through a liquid suction pipe. The outlet of the liquid pump penetrates through the hard plate and is connected to the inside of the liquid sac frame through a liquid injection pipe. The liquid pump can flexibly exchange the hydraulic oil between the liquid storage box and the liquid sac frame. The liquid sac frame can be flexibly switched between the expanded and stored states, so as to meet the hot pressing forming requirements of the foam box.

[0008] Furthermore, on one side of the base frame where the hot pressing block is located, a fixed plate is fixedly connected. A hydraulic cylinder is fixedly installed on the fixed plate. The hydraulic cylinder is connected to the hot pressing block through a piston rod. At the top of the fixed plate, two connecting rods are fixedly connected. The connecting rods are fixedly connected to the first mold frame and the second mold frame. The hot pressing block is driven by the hydraulic cylinder to move on the mounting seat for hot pressing operation.

[0009] Furthermore, the sealing plate, the mounting seat and the hot pressing block are modularly arranged inside the first mold frame. The sealing plate and the hot pressing block can be replaced with different specifications adapted to the molding specifications of the foam box, so that the mold can press foam boxes with different inner cavities.

[0010] Furthermore, on the side of the hot pressing block facing the hydraulic cylinder, an installation groove is provided. A first electromagnet is fixedly assembled in the installation groove of the hot pressing block. At the rod end of the piston rod of the hydraulic cylinder, a second electromagnet is fixedly assembled. After the first electromagnet and the second electromagnet are energized, their magnetic poles are different. The first electromagnet is used to adsorb the second electromagnet, so that the hydraulic cylinder and the hot pressing block can be flexibly docked and separated.

[0011] Furthermore, a measuring mechanism is provided on the connecting rod. The measuring mechanism includes a scale tube, a sliding ring and a connecting frame. The scale tube is fixedly provided on the rod body of the connecting rod. Fine scales are provided on the outer tube wall of the scale tube. A sliding ring is slidably connected to the scale tube. The scale tube uses the sliding ring as a scale reference. A connecting frame is vertically fixedly connected between the two sliding rings on both sides. The connecting frame is connected to the hot pressing block. When the hot pressing block slides on the mounting seat, it will synchronously drive the sliding ring on the connecting frame to displace. Thus, according to the displacement distance of the sliding ring on the scale tube, the depth of the hot pressing block extending between the mold plates can be known.

[0012] Furthermore, a first magnet and a second magnet are also included. The first magnet is fixedly installed on the hot pressing block. The second magnet is fixedly installed at the end of the connecting frame close to the hot pressing block. The first magnet and the second magnet cooperate with each other and have different magnetic poles. By the mutual adsorption of the first magnet and the second magnet, the hot pressing block and the connecting frame can be quickly docked or separated, so as to facilitate the maintenance of the measuring mechanism.

[0013] The beneficial effects of the present invention are as follows: 1. By controlling the mold plate on the sliding plate through a cylinder, the present invention can dynamically adjust the molding frames of different molding specifications, so that the mold can produce foam boxes of various specifications. And in cooperation with the liquid sac frame that closely fits the mold plate in the expanded state, it ensures the flatness and smoothness of the bottom of the foam box during the hot pressing molding process, thereby improving the quality of the finished product.

[0014] 2. The present invention can be adsorbed and arranged through the first electromagnet and the second electromagnet, enabling the quick docking and separation between the hot pressing block and the hydraulic cylinder, simplifying the operation process of replacing hot pressing blocks with different forming specifications, and improving work efficiency.

[0015] 3. The present invention can also, through the measuring mechanism, help the operator accurately master the depth of the hot pressing block extending between the die plates, realizing precise control of the size of the pressed foam box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0017] Figure 2 It is a connection relationship diagram of the base frame, die frame one, and die frame two of the present invention.

[0018] Figure 3 It is a schematic diagram of the cooperation relationship of the sealing plate, mounting seat, hot pressing block, and die plate of the present invention.

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the specific components of die frame one and the adjusting mechanism of the present invention.

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the specific components of the liquid sac frame and the hydraulic mechanism of the present invention.

[0021] Figure 6 It is a connection relationship diagram of components such as the fixing plate, hydraulic cylinder, and hot pressing block of the present invention.

[0022] Figure 7 It is a schematic diagram of the hydraulic cylinder, first electromagnet, and second electromagnet of the present invention.

[0023] Figure 8 It is a connection relationship diagram of the specific components of the hot pressing block and the measuring mechanism of the present invention.

[0024] In the above drawings: 1: base frame, 2: die frame one, 21: slide rail, 3: die frame two, 4: bottom plate part, 41: liquid sac frame, 42: hard plate, 5: sealing plate, 51: mounting seat, 6: hot pressing block, 7: adjusting mechanism, 71: sliding plate, 711: roller, 72: cylinder, 73: die plate, 74: connecting frame, 8: feeding valve, 9: hydraulic mechanism, 91: liquid storage box, 92: liquid pump, 93: liquid suction pipe, 94: liquid injection pipe, 10: fixing plate, 11: hydraulic cylinder, 12: connecting rod, 13: first electromagnet, 131: second electromagnet, 14: measuring mechanism, 141: graduated tube, 142: sliding ring, 143: connecting frame, 151: magnet one, 152: magnet two. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0027] Embodiment 1: A foam packaging box forming mold that is convenient for adjusting internal specifications, such as Figures 1-4As shown in the figure, it includes a base frame 1, a first mold frame 2 and a second mold frame 3. The base frame 1 is the assembly carrier of this forming mold. The first mold frame 2 and the second mold frame 3 are fixedly assembled at intervals on the top of the base frame 1. The middle part of the first mold frame 2 is an annular opening, and the middle part of the second mold frame 3 is a square opening for forming a foam box. It also includes a bottom plate part 4 embedded in the square opening of the second mold frame 3. The bottom plate part 4 is used to shape the bottom surface of the foam box. A sealing plate 5 with a through-hole in the middle is fixedly connected to the middle of the side of the first mold frame 2 facing the second mold frame 3. An installation seat 51 is fixedly connected to the side of the sealing plate 5 facing away from the second mold frame 3. The installation seat 51 is located in the annular opening of the first mold frame 2. A hot pressing block 6 is slidably installed on the installation seat 51. The shape of the through-hole of the sealing plate 5 is the same as that of the hot pressing block 6. A slide rail 21 is provided on the circumferential frame of the side of the first mold frame 2 facing the second mold frame 3. An adjusting mechanism 7 for adjusting the forming specification of the foam box is provided on the first mold frame 2. The adjusting mechanism 7 includes: sliding plates 71, four of which are respectively slidably installed on the slide rails 21 on the four sides of the first mold frame 2. Rollers 711 are installed on the sliding plates 71. The rollers 711 are slidably matched with the corresponding slide rails 21. A cylinder 72 is fixedly installed on the sliding plate 71. A mold plate 73 is fixedly installed on the piston rod of the cylinder 72. A connecting frame 74 is fixedly provided on one side of the mold plate 73. Adjacent two mold plates 73 are slidably connected through the connecting frame 74. The four mold plates 73 are slidably spliced end to end through the connecting frame 74 to form a square forming frame. One side surface of the four mold plates 73 is slidably and hermetically attached to the sealing plate 5, and the other side surface of the four mold plates 73 is slidably attached to the bottom plate part 4. A feeding valve 8 for docking and adding cured EPS raw material pipe is installed on the top mold plate 73 among the four mold plates 73. According to the forming specification required for the foam box, by synchronously activating the cylinders 72 on the first mold frame 2, the cylinders 72 drive the corresponding mold plates 73 to slide. Cooperating with the bottom plate part 4 as the forming bottom plate of the forming frame, the four slidably matched mold plates 73 can dynamically adjust the forming frame of different forming specifications. Drive the hot pressing block 6 to slide through the through-hole of the sealing plate 5 and press it into the forming frame composed of the mold plates 73. Then, inject the cured EPS raw material into the forming frame composed of the four mold plates 73 through the feeding valve 8. Cooperate with the hot pressing block 6 to continue pressing and heating the EPS raw material on the bottom plate part 4, so that the EPS raw material expands and melts into a thermoplastic state and gradually forms between the four mold plates 73. Thus, this mold can flexibly adjust and produce foam boxes of different specifications.

[0028] As Figure 2 , Figure 3 and Figure 5As shown in the figure, the bottom plate member 4 includes a liquid bladder frame 41 and a hard plate 42. The liquid bladder frame 41 is fixedly embedded at the square opening of the second mold frame 3. The liquid bladder frame 41 is an elastic bladder with one side open. The side of the liquid bladder frame 41 facing the mold plate 73 is stretchable. After the side of the liquid bladder frame 41 is fully expanded, it can fit flatly against the side of the mold plate 73. A hard plate 42 is fixedly installed at the opening of the liquid bladder frame 41. The liquid bladder frame 41 and the hard plate 42 form a collapsible and expandable bladder. A hydraulic mechanism 9 for expanding the liquid bladder frame 41 is provided on the second mold frame 3. Before adjusting the molding specifications of the mold plate 73 through the cylinder 72, the liquid bladder frame 41 is in a contracted state and does not fit against the mold plate 73, enabling the flexible adjustment of the molding specifications of the mold plate 73. After the mold plate 73 is adjusted to the required molding specifications, the hydraulic mechanism 9 is used to inject hydraulic oil into the liquid bladder frame 41 to fully expand the liquid bladder frame 41. At this time, the protrusion of the connecting frame 74 on the mold plate 73 will be embedded into the bladder surface of the expanded liquid bladder frame 41. Until it is fully expanded, the bladder surface of the liquid bladder frame 41 will closely adhere to the side of the mold plate 73, enabling the foam box to be hot-pressed and formed between the mold plates 73 with the liquid bladder frame 41 as the bottom surface.

[0029] As Figure 1 and Figure 5 As shown in the figure, the hydraulic mechanism 9 includes a liquid storage box 91 fixedly installed on the top of the second mold frame 3. The liquid storage box 91 stores hydraulic oil for expanding the liquid bladder frame 41. A liquid pump 92 is fixedly installed on the top of the second mold frame 3. The inlet of the liquid pump 92 is connected to the inside of the liquid storage box 91 through a liquid suction pipe 93, and the outlet of the liquid pump 92 is connected to the inside of the liquid bladder frame 41 through a liquid injection pipe 94 passing through the hard plate 42. The liquid pump 92 can flexibly exchange the hydraulic oil between the liquid storage box 91 and the liquid bladder frame 41, enabling the liquid bladder frame 41 to flexibly switch between the expanded and retracted states, thus meeting the hot-pressing and forming requirements of the foam box.

[0030] As Figure 6 As shown in the figure, on one side of the hot pressing block 6 on the base frame 1, a fixed plate 10 is fixedly connected. A hydraulic cylinder 11 is fixedly installed on the fixed plate 10. The hydraulic cylinder 11 is connected to the hot pressing block 6 through a piston rod. Two connecting rods 12 are fixedly connected to the top of the fixed plate 10. The connecting rods 12 are fixedly connected to the first mold frame 2 and the second mold frame 3. The hot pressing block 6 is driven by the hydraulic cylinder 11 to perform moving hot pressing operations on the mounting seat 51; the sealing plate 5, the mounting seat 51, and the hot pressing block 6 are modularly arranged inside the first mold frame 2. The sealing plate 5 and the hot pressing block 6 can be replaced with different specifications adapted to the molding specifications of the foam box, enabling this mold to press foam boxes with different inner cavities.

[0031] When using this mold to produce foam packing boxes of different specifications, the operator first dynamically adjusts the internal specifications of the forming cavity according to the forming size requirements of the foam box through the adjusting mechanism 7. Specifically, under the preset control system instructions, four cylinders 72 are synchronously started, so that the mold plates 73 connected correspondingly are pushed by the cylinders 72 to slide, and cooperate with the corresponding sliding plates 71 to move smoothly along the slide rails 21 of the mold frame 1-2, so that the sliding plates 71 drive the four mold plates 73 to expand outwards or contract inwards between the sliding splicing structures of the connecting frame 74, thus forming a square forming frame with variable forming size. In this process, the inner side of the mold plate 73 always maintains a sliding seal fit with the sealing plate 5, and there is an adjustment gap reserved between the outer side of the mold plate 73 and the liquid sac frame 41 to ensure that the mold plate 73 is not interfered by the liquid sac frame 41 during the size adjustment process. After the mold plate 73 is adjusted to the target forming size, the hydraulic mechanism 9 starts to intervene, that is, the liquid pump 92 is enabled. The liquid pump 92 injects the hydraulic oil in the liquid storage box 91 into the interior of the liquid sac frame 41 through the liquid injection pipe 94. The elastic sac of the liquid sac frame 41 gradually expands under the filling of the hydraulic oil. When the liquid sac frame 41 is fully expanded, its surface expands outwards and closely fits the outer sides of the four mold plates 73. At the same time, the convex structure of the connecting frame 74 will be embedded in the sac surface of the liquid sac frame 41 to form a seamless forming bottom support. Subsequently, the hot pressing block 6 is driven by the hydraulic cylinder 11 to pass through the through hole of the sealing plate 5 and accurately embed into the forming cavity surrounded by the mold plates 73. Then the operator immediately injects a certain amount of cured EPS raw material into the forming cavity through the feeding valve 8. After the feeding is completed, continuous pressure is applied in cooperation with the hot pressing block 6 and the heating function is started, forcing the EPS raw material to expand, melt and fully fit the forming surfaces of the mold plates 73 and the liquid sac frame 41 in the restricted cavity until the foam box is pressed and formed in the forming cavity, thereby realizing that the mold can flexibly adapt to the production requirements of foam boxes of different sizes in the same set of systems.

[0032] Embodiment 2: On the basis of Embodiment 1, as Figure 1 , Figure 6 and Figure 7 shown, an installation groove is formed on the side of the hot pressing block 6 facing the hydraulic cylinder 11. A first electromagnet 13 is fixedly assembled in the installation groove of the hot pressing block 6. A second electromagnet 131 is fixedly assembled at the rod end of the piston rod of the hydraulic cylinder 11. After the first electromagnet 13 and the second electromagnet 131 are energized, their magnetic poles are different. The first electromagnet 13 is used to adsorb the second electromagnet 131, so that the hydraulic cylinder 11 and the hot pressing block 6 can be flexibly docked and separated.

[0033] As Figure 1 and Figure 8As shown, a measuring mechanism 14 is provided on the connecting rod 12, and the measuring mechanism 14 includes a calibrated tube 141, a sliding ring 142 and a connecting frame 143. A calibrated tube 141 is fixedly provided on the rod body of the connecting rod 12, and fine scales are provided on the outer tube wall of the calibrated tube 141. The calibrated tube 141 is slidably connected with a sliding ring 142, and the calibrated tube 141 uses the sliding ring 142 as a scale reference. A connecting frame 143 is vertically fixedly connected between the sliding rings 142 on both sides, and the connecting frame 143 is connected to the hot pressing block 6. When the hot pressing block 6 slides on the mounting seat 51, it will synchronously drive the sliding ring 142 on the connecting frame 143 to move, so that the depth of the hot pressing block 6 extending between the mold plates 73 can be known according to the displacement distance of the sliding ring 142 on the calibrated tube 141, so that it is convenient for the operator to accurately control the size of the foam box pressed by the hot pressing block 6.

[0034] like Figure 8 As shown, it also includes magnet one 151 and magnet two 152. Magnet one 151 is fixedly installed on the hot pressing block 6, and magnet two 152 is fixedly installed on the end of the connecting frame 143 close to the hot pressing block 6. Magnet one 151 and magnet two 152 cooperate with each other and have different magnetic properties. Magnet one 151 and magnet two 152 are mutually attracted, so that the hot pressing block 6 and the connecting frame 143 can be quickly connected or separated, thereby facilitating the maintenance of the measuring mechanism 14.

[0035] When it is necessary to switch the specifications of the hot pressing block 6, the operator cuts off the power supply of the first electromagnet 13 and the second electromagnet 131, and the heteropolar magnetic attraction force between the two disappears. Then the hydraulic cylinder 11 is automatically separated from the hot pressing block 6 through the piston rod. After replacing the hot pressing block 6 of the adapted specification, the power is turned on again to make the first electromagnet 13 and the second electromagnet 131 produce heteropolar magnetism, so that the piston rod of the hydraulic cylinder 11 and the hot pressing block 6 are adsorbed and locked again to form a rigid connection, so that there is no need for complicated mechanical disassembly, which significantly improves the replacement efficiency of the hot pressing block 6; the magnet 151 on the hot pressing block 6 is connected to the magnet 2 at the end of the connecting frame 143. After 152 is connected by heteropolar magnetic adsorption, when the hot pressing block 6 is in the hot pressing advancement process, the connecting frame 143 moves synchronously with the movement of the hot pressing block 6, and the sliding ring 142 fixed on the connecting frame 143 slides along the outer wall of the graduation tube 141. The operator can judge the depth of the hot pressing block 6 extending into the molding cavity in real time by observing the graduation marks corresponding to the sliding ring 142, thereby accurately controlling the height of the inner cavity of the foam box and the molding pressure distribution. If the connecting frame 143 or the graduation tube 141 needs to be maintained, it is only necessary to manually separate the magnet 1 151 and the magnet 2 152 to release the connection, thereby avoiding the cumbersome operation of traditional bolt fixing.

[0036] The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited by the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the claims.

Claims

1. A foam packaging box forming mold that is easy to adjust the internal specifications, comprising a mold frame 1 (2) and a mold frame 2 (3) fixedly arranged at intervals on the top of a base frame (1); Its characteristics are: It also includes a bottom plate (4), the bottom plate (4) being embedded in the opening of the second mold frame (3) and used for shaping the bottom surface of the foam box, a sealing plate (5) being fixedly connected to the side of the first mold frame (2) facing the second mold frame (3), a mounting seat (51) being fixedly connected to the side of the sealing plate (5) facing away from the second mold frame (3), the mounting seat (51) being located in the opening of the first mold frame (2), a hot pressing block (6) being slidably mounted on the mounting seat (51), an internal opening of the sealing plate (5) being slidably adapted to fit the hot pressing block (6), and an adjusting mechanism (7) for adjusting the molding specifications of the foam box being provided on the first mold frame (2); The adjustment mechanism (7) comprises: a sliding plate (71), which is provided with four sliding plates and respectively slidably mounted on the slide rails (21) on the four sides of the mold frame (2); a roller (711) is mounted on the sliding plate (71); the roller (711) and the corresponding slide rail (21) are slidably matched; a cylinder (72) is fixedly mounted on the sliding plate (71); a mold plate (73) is fixedly mounted on the piston rod of the cylinder (72); a connecting frame (74) is fixedly mounted on one side of the mold plate (73); two adjacent mold plates (73) are slidably connected via the connecting frame (74); the four mold plates (73) are slidably mounted end to end via the connecting frame (74) to form a square molding frame; the mold plate (73) and the sealing plate (5) are slidably sealed and fitted; a feeding valve (8) is mounted on the top of the mold plate (73).

2. A foam packaging box forming mold that is easy to adjust the internal specifications according to claim 1, characterized in that: The bottom plate (4) comprises a liquid capsule frame (41) and a hard plate (42); the liquid capsule frame (41) is fixedly embedded in the opening of the second mold frame (3); the liquid capsule frame (41) is an elastic capsule body with an opening on one side; the side of the liquid capsule frame (41) facing the mold plate (73) is retractable; the hard plate (42) is fixedly mounted at the opening of the liquid capsule frame (41); and a hydraulic mechanism (9) for expanding the liquid capsule frame (41) is provided on the second mold frame (3).

3. A foam packaging box forming mold that is easy to adjust the internal specifications according to claim 2, characterized in that: The hydraulic mechanism (9) comprises a liquid storage box (91) fixedly mounted on the top of the second mold frame (3), wherein hydraulic oil is stored in the liquid storage box (91), and a liquid pump (92) is fixedly mounted on the top of the second mold frame (3), wherein the liquid inlet of the liquid pump (92) is connected to the liquid storage box (91) via a liquid extraction pipe (93), and the liquid outlet of the liquid pump (92) is connected to the liquid bag frame (41) via a liquid injection pipe (94) that penetrates the hard plate (42).

4. A foam packaging box forming mold that is easy to adjust the internal specifications according to claim 3, characterized in that: A fixed plate (10) is fixedly connected to one side of the base frame (1) where the hot pressing block (6) is located, a hydraulic cylinder (11) is fixedly mounted on the fixed plate (10), the hydraulic cylinder (11) is connected to the hot pressing block (6) via a piston rod, and two connecting rods (12) are fixedly connected to the top of the fixed plate (10), the connecting rods (12) are fixedly connected to the mold frame 1 (2) and the mold frame 2 (3).

5. A foam packaging box forming mold that is easy to adjust the internal specifications according to claim 4, characterized in that: The sealing plate (5), the mounting seat (51) and the hot pressing block (6) are modularly arranged inside the mold frame (2); the sealing plate (5) and the hot pressing block (6) can be replaced with different specifications according to the molding specifications of the foam box.

6. A foam packaging box forming mold that is easy to adjust the internal specifications according to claim 5, characterized in that: The hot pressing block (6) is provided with a mounting groove on a side facing the hydraulic cylinder (11); a first electromagnet (13) is fixedly mounted in the mounting groove of the hot pressing block (6); a second electromagnet (131) is fixedly mounted on the rod end of the piston rod of the hydraulic cylinder (11); the first electromagnet (13) and the second electromagnet (131) have different magnetic properties when energized.

7. A foam packaging box forming mold that is easy to adjust the internal specifications according to claim 6, characterized in that: The connecting rod (12) is provided with a measuring mechanism (14), the measuring mechanism (14) comprising a graduated tube (141), a sliding ring (142) and a connecting frame (143); a graduated tube (141) is fixedly provided on the rod body of the connecting rod (12); a sliding ring (142) is slidably connected to the graduated tube (141); the graduated tube (141) uses the sliding ring (142) as a scale reference; a connecting frame (143) is fixedly connected between the sliding rings (142) on both sides; the connecting frame (143) is connected to the hot pressing block (6).

8. A foam packaging box forming mold that is easy to adjust the internal specifications according to claim 7, characterized in that: It also includes a first magnet (151) and a second magnet (152), wherein the first magnet (151) is fixedly mounted on the hot pressing block (6), and the second magnet (152) is fixedly mounted on the end of the connecting frame (143) close to the hot pressing block (6), and the first magnet (151) and the second magnet (152) cooperate with each other and have different magnetic properties.

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