A mold for producing foam boards

Abstract

The present application relates to the technical field of foam board production, and discloses a mold for producing foam boards, including an upper mold, a lower mold, and a core, wherein the core is arranged with a plurality of core heads, and a first ventilation channel and a second ventilation channel are provided on the core, wherein one end of the first ventilation channel and the second ventilation channel passes through the bottom of the core, the other end of the first ventilation channel passes through the top of the core head, and the other end of the second ventilation channel passes through the outer peripheral side of the core head, and a plurality of second ventilation channels are evenly spaced. The foam maturity between the pores of the foam board of the present application and the foam base maturity are relatively uniform, and a relatively uniform maturity can be formed.

Description

Technical Field

[0001] The present application relates to the technical field of foam board production, and in particular to a mold for producing foam boards. Background Art

[0002] Foam boxes are lightweight and shockproof, making them widely used in product packaging across various industries. When processing foam, the raw foam material is placed into the mold cavity, steam is introduced to foam it, and then water is passed through the mold to cool it, separating the foam product from the metal mold.

[0003] Reference Figure 1 The foam mold includes a core 3 with several core heads 30. Ventilation holes 301 are located at the top of the core heads 30. When steam is input, it enters the mold cavity through the vent holes 301 in the core 3, causing the granular material to foam. Ventilation holes 301 do not pass cooling water, only steam, so they are very small.

[0004] With respect to the above-mentioned related art, since the vent holes on the core head 30 are at the top, the bottom plate of the foam board is always heated, and the foam maturity between the holes of the foam board and the maturity of the bottom plate of the foam board are uneven. Summary of the Invention

[0005] In order to enable the foam board to form a relatively uniform degree of maturity, the present application provides a mold for producing the foam board.

[0006] This application provides a mold for producing foam boards, which adopts the following technical solutions:

[0007] A mold for producing foam boards, comprising an upper mold, a lower mold and a core, wherein the core is arranged with a plurality of core heads, and a first ventilation channel and a second ventilation channel are opened on the core, wherein one end of the first ventilation channel and the second ventilation channel passes through the bottom of the core, the other end of the first ventilation channel passes through the top of the core head, and the other end of the second ventilation channel passes through the outer peripheral side of the core head, and a plurality of second ventilation channels are evenly distributed.

[0008] By adopting the above technical solution, when steam is input, the steam can enter the mold cavity through the first ventilation channel and the second ventilation channel, so that the granular raw material is foamed into foam. The first ventilation channel is mainly filled into the mold cavity to heat the formation of the foam base plate, and the second ventilation channel is filled into the mold cavity to heat the formation of the edge of the foam base plate. Therefore, when the foam board is formed, the foam maturity between the pores of the foam board and the maturity of the foam base plate are relatively uniform, and a relatively uniform maturity can be formed.

[0009] Optionally, it also includes a water-gas separation plate, on which a first connecting hole and a second connecting hole are provided, the first connecting hole is connected to the first ventilation channel, the second connecting hole is connected to the second ventilation channel, the second connecting hole and the second ventilation channel correspond one-to-one, a plurality of connecting holes are provided on the inner wall of the first connecting hole, the connecting holes are connected to the second connecting hole, the water-gas separation plate is connected to an air intake pipe, the air intake pipe corresponds one-to-one to the core head, and the air intake pipe is connected to the connecting hole.

[0010] By adopting the above technical solution, the first communicating hole and the second communicating hole are connected to each other through the connecting hole, and steam can directly enter the first communicating hole and the second communicating hole through the air inlet hole.

[0011] Optionally, it further includes a blocking component for blocking the connection between the connecting hole and the second connecting hole, the blocking component includes a lifting plate and a blocking block fixedly installed on the lifting plate, and the blocking block is slidably installed in the second connecting hole.

[0012] By adopting the above technical solution, after the foam board is generated, because the foam board may still be warm, high-pressure gas is introduced into the first ventilation channel of the core to blow the foam board away from the core, and people do not need to directly contact the foam board with their hands; because the second ventilation channels are distributed on the circumference of the core head, if gas is also introduced into the second ventilation channels, the number of second ventilation channels is relatively large, and the high-pressure gas in the second ventilation channels applies force to the holes of the foam board, which increases the friction of the foam board on the core, making the foam board difficult to be blown away. Therefore, the second ventilation channel is temporarily closed. Therefore, the sealing component temporarily seals the connection between the second connecting hole and the connecting hole after the foam board is generated. The high-pressure gas will not enter the second connecting hole, and the high-pressure gas directly enters the first ventilation channel, which has an upward impact force on the foam board, so that the foam board can leave the core more smoothly.

[0013] Optionally, a driving assembly for driving the lifting plate to move up and down is further included, wherein the driving assembly includes a base plate and an elastic member, wherein the base plate is located below the lifting plate, and the elastic member is installed between the lifting plate and the base plate, and the elastic member enables the lifting plate to always have an upward trend.

[0014] By adopting the above technical solution, the driving component can control whether the blocking block blocks the second communicating hole.

[0015] The cooperation between the bottom plate and the elastic member enables the lifting plate to move upwards, and the lifting plate brings the blocking block up to block the junction of the first communicating hole and the connecting hole.

[0016] Optionally, the elastic member is a compression spring, and there are multiple compression springs that are evenly distributed.

[0017] Optionally, the driving assembly further includes a push block and a push rod, the push block is mounted on the lifting plate, and the push rod is fixedly mounted on the upper mold. When the upper mold and the lower mold are matched, the push rod pushes the push block and the lifting plate moves downward.

[0018] By adopting the above technical solution, when the upper mold and the lower mold cooperate, the push rod pushes the push block, so that the lifting plate takes the blocking block away, the second connecting hole and the connecting hole are connected, and steam can enter the first connecting hole and the second connecting hole at the same time.

[0019] Optionally, when the first connecting hole and the second connecting hole are connected, a distance is left between the lifting plate and the water-gas separation plate.

[0020] By adopting the above technical solution, when the first connecting hole and the second connecting hole are connected, the upper mold and the lower mold are still in a closed state, the push rod presses down the lifting plate, and a distance is left between the lifting plate and the water-vapor separation plate. When the foam plate is formed, the distance left between the lifting plate and the water-vapor separation plate can form a heat dissipation channel, thereby increasing the heat dissipation effect of the water-vapor separation plate and the core.

[0021] Optionally, the air inlet pipe passes through the lifting plate.

[0022] By adopting the above technical solution, the air intake pipe passes through the lifting plate, the air intake pipe and the lifting plate are constrained to each other, and the lifting plate can only move up and down under the limitation of the air intake pipe.

[0023] Optionally, the water-gas separation plate is provided with a plurality of cooling channels.

[0024] By adopting the above technical solution, the paths of cold water cooling and steam heating are different.

[0025] Optionally, the lower mold is provided with a liquid inlet and a liquid outlet, the side wall of the water-gas separation plate close to the liquid inlet and the liquid outlet is provided with a collecting channel, and several cooling channels are connected to the collecting channel.

[0026] By adopting the above technical solution, the water-gas separation plate can take in air and water at the same time, and the foam plate can be cooled immediately after it is generated, thereby increasing efficiency.

[0027] In summary, this application has at least one of the following beneficial effects:

[0028] 1. By setting the first ventilation channel and the second ventilation channel, efficient ventilation inside the mold is achieved, improving the quality of the foam product;

[0029] 2. Flexible control of the first and second ventilation channels is achieved by installing a water-gas separation plate, a blocking assembly, and a drive assembly. The water-gas separation plate separates the gas entering the mold from water and gas, ensuring gas purity; the blocking assembly blocks the second ventilation channel when needed, switching the gas flow; and the drive assembly drives the blocking assembly up and down, further enhancing the mold's practicality and ease of operation.

[0030] 3. When the coolant enters the water-gas separation plate for cooling, the gap formed between the bottom of the water-gas separation plate and the lifting plate can also serve as a heat dissipation channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the core of the related technology;

[0032] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0033] Figure 3 This is a schematic diagram showing the positional relationship between the core and the water-gas separation plate in an embodiment of the present application;

[0034] Figure 4 is a cross-sectional view of the cooperation between the core and the water-gas separation plate of an embodiment of the present application;

[0035] Figure 5 is a schematic diagram of an embodiment of the present application in which the blocking component does not block the second communicating hole;

[0036] Figure 6 is a cross-sectional schematic diagram of the blocking component of the embodiment of the present application blocking the second communicating hole;

[0037] Figure 7 is a cross-sectional schematic diagram of the cooperation between the driving assembly and the blocking assembly in an embodiment of the present application;

[0038] Figure 8 Schematic diagram of a push block extending out of a lower die according to an embodiment of the present application;

[0039] Figure 9 This is a cross-sectional view of the water-gas separation plate of an embodiment of the present application showing the distribution of cooling channels.

[0040] Explanation of the accompanying drawings: 1. Upper mold; 11. Mold cavity; 2. Lower mold; 21. Liquid inlet hole; 22. Liquid outlet hole; 3. Core; 30. Core head; 31. First ventilation channel; 32. Second ventilation channel; 4. Water-gas separation plate; 41. First connecting hole; 42. Second connecting hole; 43. Connecting hole; 44. Air inlet pipe; 45. Cooling channel; 46. Collection channel; 5. Sealing assembly; 51. Lifting plate; 52. Sealing block; 6. Driving assembly; 61. Bottom plate; 62. Elastic part; 63. Push block; 64. Push rod; 301. Ventilation micropore. DETAILED DESCRIPTION

[0041] The following is combined with Figure 2-9 This application is described in further detail.

[0042] The present application embodiment discloses a mold for producing a foam board. Figure 2 A mold for producing a foam board also includes an upper mold 1, a lower mold 2, and a core 3 fixedly installed in the lower mold 2. The upper mold 1 and the lower mold 2 are covered to form a mold cavity 11, and the core 3 is located in the mold cavity 11. The core 3 is arranged with a plurality of core heads 30, and a first ventilation channel 31 and a second ventilation channel 32 are specially opened on the core 3. One end of the first ventilation channel 31 and the second ventilation channel 32 both pass through the bottom of the core 3 for receiving steam. The other end of the first ventilation channel 31 passes through the top of the core head 30, so that the gas can enter the interior of the mold directly from the top of the core head 30. The other end of the second ventilation channel 32 passes through the outer peripheral side of the core head 30, and a plurality of second ventilation channels 32 are evenly spaced on the core 3.

[0043] This design allows gas to enter the mold more evenly from the outer peripheral side of the core head 30, and steam is discharged from the first ventilation channel 31 and the second ventilation channel 32 respectively, which has a more uniform heating effect on the granular raw material in the mold cavity 11, so that the maturity of the foam between the pores of the foam board and the bottom of the foam board are basically the same.

[0044] The first ventilation channel 31 and the second ventilation channel 32 only allow water vapor to pass through. The first ventilation channel 31 and the second ventilation channel 32 are very small single holes for invisible ventilation. Foam will not enter the first ventilation channel 31 and the second ventilation channel 32, so the surface of the foam board is smooth without convex spots.

[0045] Example 2

[0046] Based on Example 1, the embodiment of the present application further provides a foam mold including a water-gas separation plate 4, a sealing component 5 and a driving component 6, so that steam heating and coolant cooling can be carried out separately, and the gas path can be controlled.

[0047] Specifically, refer to Figure 3 and Figure 4, the water-gas separation plate 4 is fixedly installed in the lower mold 2, and is fixedly connected to the lower surface of the core 3. A first connecting hole 41 and a second connecting hole 42 are provided on the water-gas separation plate 4. The first connecting hole 41 is connected to the first ventilation channel 31, and is used to transmit the gas entering from the top of the core head 30; and the second connecting hole 42 corresponds one-to-one with and is connected to the second ventilation channel 32, and is used to transmit the gas entering from the outer peripheral side of the core head 30. It is worth noting that a number of connecting holes 43 are also provided on the inner wall of the first connecting hole 41, and the connecting holes 43 and the second connecting holes 42 correspond one-to-one, so that the first ventilation channel 31 and the second ventilation channel 32 are connected to each other, forming a special gas passage.

[0048] To achieve flexible control of the air passage, the second vent channel 32 is temporarily closed before the foam board is demolded. The second vent channel 32 does not exert any impact force on the inner wall of the foam board hole, and the foam board hole and the core head 30 are only in contact. Introducing air into the first vent channel 31 can blow away the foam board, allowing it to smoothly leave the lower mold 2 and core 3.

[0049] Therefore, refer to Figure 5 This embodiment also includes a sealing assembly 5, which is installed in the lower mold 2 and below the moisture separation plate 4. The sealing assembly 5 consists of a lifting plate 51 and a sealing block 52 fixedly mounted on the lifting plate 51. The sealing block 52 is designed to be constantly slidably mounted in the second connecting hole 42, thereby blocking or opening the second ventilation channel 32 as needed.

[0050] Reference Figure 6 When the blocking block 52 plays a blocking role, the blocking block 52 simultaneously blocks the second communicating hole 42 and the connection point between the second communicating hole 42 and the connecting hole 43, achieving a double blocking effect.

[0051] Furthermore, the moisture separation plate 4 is connected to an air inlet pipe 44, which corresponds one-to-one with the core head 30. One end of the air inlet pipe 44 is fixedly connected to the moisture separation plate 4 and communicates with the first communication hole 41. The other end of the air inlet pipe 44 extends outside the moisture separation plate 4 and the lower mold 2. This design allows the separated gas to enter each core head 30 of the mold directly through the air inlet pipe 44.

[0052] Furthermore, to simplify the gas pipeline, several inlet pipes 44 can be designed to be connected to the same central pipe, which only needs to be connected to one device that generates high-pressure, high-temperature steam. This layout not only simplifies the pipeline, but also facilitates centralized management and control.

[0053] Reference Figure 7Furthermore, this embodiment also includes a driving assembly 6, which is installed in the lower mold 2 and is located below the lifting plate 51. The driving assembly 6 is used to drive the lifting plate 51 to move up and down. Specifically, the driving assembly 6 includes a bottom plate 61 and an elastic member 62. The bottom plate 61 is located below the lifting plate 51, and the elastic member 62 is installed between the lifting plate 51 and the bottom plate 61. Under the action of the elastic member 62, the lifting plate 51 always has an upward trend, thereby ensuring that the blocking block 52 can tightly block the second ventilation channel 32 under the normal state of the elastic member 62.

[0054] Example 3

[0055] On the basis of Example 2, the embodiment of the present application further refines the specific structure of the drive assembly 6. Figure 7 The elastic member 62 is preferably a compression spring, and there are several compression springs that are evenly distributed to provide a more stable and uniform elastic force.

[0056] In addition, refer to Figure 7 and Figure 8 , the driving assembly 6 also includes a push block 63 and a push rod 64. The push block 63 is installed on the lifting plate 51. One end of the push block 63 passes through the lower mold 2 and slides up and down on the lower mold 2. The lower mold 2 is provided with a long groove for the sliding slider. The push rod 64 is fixedly installed on the upper mold 1. Two push blocks 63 are installed on one side of a lifting plate 51, and the two push blocks 63 share a long groove. When the upper mold 1 and the lower mold 2 are matched, the push rod 64 will push the push block 63, thereby moving the lifting plate 51 downward and the elastic member 62 is compressed. This design cleverly utilizes the opening and closing action of the mold to drive the movement of the sealing assembly 5, thereby realizing automatic switching of the gas passage.

[0057] This embodiment further optimizes the air intake pipe 44 and the water-gas separation plate 4. Specifically, the air intake pipe 44 is designed to pass through the lifting plate 51, the bottom plate 61, and the lower mold plate 2. This structure ensures the stability of the air intake pipe 44 and the stable up and down movement of the lifting plate 51.

[0058] Example 4

[0059] On the basis of Example 2 or 3, refer to Figure 9 The moisture separation plate 4 also includes several cooling channels 45 for passing coolant to cool the mold, thereby improving foam molding efficiency and quality. The cooling channels 45 are offset from the first and second communication holes 41, 42. Several cooling channels 45 are distributed across the width and length of the moisture separation plate 4. The cooling channels 45 are intersecting and interconnected across the width and length of the moisture separation plate 4.

[0060] Furthermore, the lower mold 2 is further provided with a liquid inlet 21 and a liquid outlet 22, and a collecting channel 46 is provided on both side walls of the water-gas separation plate 4 near the liquid inlet 21 and the liquid outlet 22. All the cooling channels 45 are connected to the collecting channel 46, forming an efficient cooling system.

[0061] When the lifting plate 51, with its blocking block 52, is engaged, it abuts the lower surface of the moisture separator 4. When the first and second connecting holes 41, 42 are connected, a gap remains between the lifting plate 51 and the moisture separator 4. During the foam board molding process, the upper and lower molds 1 and 2 remain closed, and as coolant is introduced into the moisture separator 4 to cool it, the gap between the lifting plate 51 and the moisture separator 4 forms a heat dissipation channel, allowing hot air from the moisture separator 4 to escape through the long grooves, thereby enhancing heat dissipation.

[0062] The upper mold 1 can also be provided with a cooling channel. The upper mold mainly adopts the existing technology and is not optimized in this embodiment, so it will not be described in detail.

[0063] The process of foam board forming: after the upper mold 1 and the lower mold 2 are covered, the granular raw material enters the mold cavity 11 between the upper mold 1 and the lower mold 2 from the feed port of the upper mold 1. Because the core 3 is in the mold cavity 11, the core 3 and the core head 30 shape the foam board; after the granular raw material enters, high-temperature and high-pressure steam is first introduced. After the foam board is formed, coolant is introduced into the water-gas separation plate 4 to cool the foam board in the mold cavity 11. Finally, when the upper mold 1 leaves the lower mold 2, the sealing component 5 first blocks the second ventilation channel 32, and then ventilates the first ventilation channel 31 so that the foam board can leave the lower mold 2 and the core 3.

[0064] In summary, the foam mold provided in this application not only improves the foam molding efficiency and quality through its unique structure and design, but also realizes flexible control of the gas passage.

[0065] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A mold for producing a foam board, comprising an upper mold (1), a lower mold (2) and a core (3), wherein the core (3) is provided with a plurality of core heads (30) arranged and distributed, and characterized in that: The core (3) is provided with a first ventilation channel (31) and a second ventilation channel (32), one end of each of the first ventilation channel (31) and the second ventilation channel (32) passes through the bottom of the core (3), the other end of the first ventilation channel (31) passes through the top of the core head (30), and the other end of the second ventilation channel (32) passes through the outer peripheral side of the core head (30), and a plurality of second ventilation channels (32) are evenly spaced. The water-gas separation plate (4) is provided with a first communicating hole (41) and a second communicating hole (42), the first communicating hole (41) is communicated with the first ventilation channel (31), the second communicating hole (42) is communicated with the second ventilation channel (32), the second communicating hole (42) and the second ventilation channel (32) are in one-to-one correspondence, a plurality of connecting holes (43) are provided on the inner wall of the first communicating hole (41), the connecting holes (43) are in communication with the second communicating holes (42), the water-gas separation plate (4) is connected with an air inlet pipe (44), the air inlet pipe (44) is in one-to-one correspondence with the core head (30), and the air inlet pipe (44) is in communication with the connecting holes (43); It also includes a blocking assembly (5) for blocking the connection between the connecting hole (43) and the second communicating hole (42), the blocking assembly (5) including a lifting plate (51), a blocking block (52) fixedly mounted on the lifting plate (51), and the blocking block (52) slidably mounted in the second communicating hole (42).

2. A mold for producing a foam board according to claim 1, characterized in that: The device further comprises a driving assembly (6) for driving the lifting plate (51) to move up and down, wherein the driving assembly (6) comprises a bottom plate (61) and an elastic member (62), wherein the bottom plate (61) is located below the lifting plate (51), and the elastic member (62) is installed between the lifting plate (51) and the bottom plate (61), and the elastic member (62) enables the lifting plate (51) to always have an upward trend.

3. A mold for producing a foam board according to claim 2, characterized in that: The elastic member (62) is a compression spring, and there are a plurality of compression springs that are evenly distributed.

4. A mold for producing a foam board according to claim 2, characterized in that: The driving assembly (6) further comprises a push block (63) and a push rod (64), wherein the push block (63) is mounted on the lifting plate (51), and the push rod (64) is fixedly mounted on the upper die (1). When the upper die (1) and the lower die (2) are engaged, the push rod (64) pushes the push block (63), and the lifting plate (51) moves downward.

5. A mold for producing a foam board according to claim 4, characterized in that: When the first communicating hole (41) and the second communicating hole (42) are connected, a distance is left between the lifting plate (51) and the water-gas separation plate (4).

6. The mold for producing a foam board according to claim 1, characterized in that: The air inlet pipe (44) passes through the lifting plate (51).

7. The mold for producing a foam board according to claim 1, characterized in that: The separation plate is provided with a plurality of cooling channels (45).

8. A mold for producing a foam board according to claim 7, characterized in that: The lower mold (2) is provided with a liquid inlet hole (21) and a liquid outlet hole (22); a collecting channel (46) is provided on the side wall of the water-gas separation plate (4) near the liquid inlet hole (21) and the liquid outlet hole (22); and a plurality of the cooling channels (45) are connected to the collecting channel (46).

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