Hollow plate water-cooling setting plate

Abstract

The utility model discloses a hollow plate water -cooling setting board. The utility model discloses a hollow plate water -cooling setting board including substrate, one side side wall of substrate is the setting face, one side of setting face is the feeding end, and the other side is the discharge end, and the substrate is sequentially provided with a plurality of interval arrangement's cooling channel from the feeding end to the discharge end, and the cooling channel is perpendicular with the flow direction of hollow plate, and from the feeding end, the minimum distance of the first cooling channel side wall to the setting face is 14 16mm, and the minimum distance of the rest cooling channel side wall to the setting face is 6 8mm. The utility model solves the problem of the prior art influence product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of hollow board plastic molding machines, and in particular to a water-cooled shaping plate for hollow boards. Background Technology

[0002] A Chinese invention patent with publication number CN102490287B, entitled "An Integral Vacuum Shaping Plate for a Hollow Board Plastic Molding Machine," discloses that "this invention selects integral steel according to the size of the vacuum shaping plate, and internally provides several vacuum channels 6 and cooling channels 8 processed by deep hole machining." According to the accompanying drawings, the cooling channels are the same size from front to back (from the inlet to the outlet of the hollow board), therefore each cooling channel has the same cooling efficiency. However, the hollow board blank entering the inlet is still in a high-temperature molten or highly elastic state. At this time, the molecular chains of the material still have strong fluidity, and the hollow structure (such as ribs and cavities) is not yet fully shaped. If the initial cooling is too fast, the surface of the board will quickly harden and shrink, while the interior remains in a high-temperature molten state (the molecular chains are not solidified), forming deep ridges (shrinkage depressions) at the ribs, affecting product quality. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a hollow board water-cooled shaping board that can not only improve product quality but also increase production capacity.

[0004] To achieve the above objectives, the technical solution adopted by the water-cooled shaping plate of this utility model is as follows:

[0005] A hollow sheet water-cooled shaping plate includes a substrate, one sidewall of which is a shaping surface. One side of the shaping surface is a feeding end, and the other side is a discharging end. The substrate has multiple cooling channels arranged at intervals from the feeding end to the discharging end. The cooling channels are perpendicular to the flow direction of the hollow sheet. Starting from the feeding end, the minimum distance from the sidewall of the first cooling channel to the shaping surface is 14-16 mm, and the minimum distance from the sidewall of the remaining cooling channels to the shaping surface is 6-8 mm.

[0006] Preferably, it also includes a vacuum channel between adjacent cooling channels, with straight grooves on one side of the shaping surface and a textured groove on the other side. The vacuum channel on the side adjacent to the feed end is connected to its corresponding straight groove through multiple vacuum suction ports, and the vacuum channel on the side adjacent to the discharge end is connected to its corresponding textured groove through multiple vacuum suction ports.

[0007] Preferably, starting from the feed end, at least three vacuum channels are reserved as independent vacuum channels, and the remaining vacuum channels are connected through transverse holes.

[0008] Preferably, the cross-section of the cooling channel is circular or rectangular.

[0009] Preferably, the substrate has a chamfer at the edge of the feed end to facilitate the entry of the hollow board blank into the shaping surface.

[0010] Compared with the prior art, this utility model has the following advantages:

[0011] 1. Increase the minimum distance from the side wall of the first cooling channel at the feeding end to the shaping surface, and reduce the minimum distance from the side walls of the remaining cooling channels to the shaping surface to achieve "slow cooling in the front and fast cooling in the back". The front section provides "buffer shaping" time for the material to ensure structural integrity and minimize internal stress, thereby improving product quality; the back section fixes the shape through "forced locking", shortens the cooling cycle, increases the operating speed of the production line, and thus increases production capacity.

[0012] 2. Starting from the feed end, at least three vacuum channels should be provided as independent vacuum channels, and negative pressure values ​​can be set separately to match the change in state of the hollow board from "flowable" to "rigidly cured". Attached Figure Description

[0013] Figure 1 This is a top view of the hollow sheet water-cooled shaping plate of this utility model.

[0014] Figure 2 yes Figure 1 AA sectional view.

[0015] Figure 3 yes Figure 2 Enlarged view of point C.

[0016] Among them, 1 is the substrate, 2 is the shaping surface, 3 is the chamfer, 4 is the cooling channel, 5 is the vacuum channel, 6 is the straight groove, 7 is the mesh groove, 8 is the vacuum suction port, and 9 is the transverse through hole. Detailed Implementation

[0017] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0018] like Figure 1-3As shown, a water-cooled shaping plate for hollow sheet includes a base plate 1, the upper sidewall of which is a shaping surface 2. The left side of the shaping surface is the inlet end, and the right side is the outlet end. A chamfer 3 is machined on the edge of the base plate at the inlet end to facilitate the entry of the hollow sheet blank into the shaping surface. Nine cooling channels 4 are sequentially opened from the inlet end to the outlet end of the base plate. The cooling channels have a circular cross-section, which is convenient for processing. The cooling channels are perpendicular to the flow direction of the hollow sheet. Starting from the inlet end, the diameter of the first cooling channel is 20mm, the minimum distance from the sidewall of the first cooling channel to the shaping surface is 15mm, and the diameter of the remaining cooling channels is 32mm. The minimum distance from the sidewall of the remaining cooling channels to the shaping surface is 7mm. Vacuum channels 5 are opened between adjacent cooling channels. Straight grooves 6 are opened on the left side of the shaping surface, and textured grooves 7 are opened on the right side of the shaping surface. The vacuum channel on the side adjacent to the feeding end is connected to its corresponding straight groove through multiple vacuum suction ports 8. The vacuum channel on the side adjacent to the discharging end is connected to its corresponding textured groove through multiple vacuum suction ports. Starting from the feeding end, three vacuum channels are left as independent vacuum channels. The remaining vacuum channels are connected through transverse holes 9. The negative pressure value can be set separately to match the change of the hollow board from "flowable" to "rigidly cured".

[0019] The specific working process and principle of this utility model: The temperature of the hollow board blank after being extruded by the extruder is about 200℃. After being cooled by the air knife on the front side of the shaping table, the temperature drops to about 180℃. After passing through the first cooling channel at the feeding end, it is slowly cooled to about 170℃, allowing the material to gradually cool from the surface to the inside, so that the temperature difference between the inside and outside is small, and the molecular chains have enough time to adjust and arrange. The cavity and ribs of the hollow board need to rely on the "natural shaping" of the material in a semi-fluid state. Slow cooling can provide time for structural filling and morphological stability, ensuring that the cavity is full and the rib strength is uniform. It avoids the formation of internal stress due to "forced shrinkage" caused by rapid cooling (excessive internal stress will lead to large shrinkage depressions or even cracks). After slow cooling, the surface of the board has been initially solidified, and the inside is close to a gel state (the fluidity of the molecular chains is greatly reduced). The overall structure is basically stable. At this time, it is necessary to complete the final shaping by rapid cooling through the remaining cooling channels, shortening the cooling cycle of the hollow board, increasing the operating speed of the production line, and reducing energy consumption. Simultaneously, starting from the feed end, the negative pressure values ​​of the first three vacuum channels are set to 0.1MPa, 0.2MPa, and 0.4MPa respectively, and the negative pressure value of the subsequent connected vacuum channels is set to 0.5MPa. When the hollow sheet passes through the first vacuum channel (0.1MPa), the low negative pressure prevents strong adsorption from crushing the ribs or thinning the wall thickness. When passing through the first vacuum channel (0.2MPa), as the temperature decreases, the rigidity of the hollow sheet slightly increases, and the medium negative pressure allows for "follow-up bonding." When passing through the first vacuum channel (0.2MPa), the rigidity of the hollow sheet increases slightly. As the curing process is further enhanced, the high negative pressure begins to "compact" the details (such as the rib roots and corners), but a certain buffer is still needed (before reaching the maximum value) to avoid slight tensile deformation in the semi-cured state. Then the board enters the near-complete curing stage. At this time, the material has strong resistance to deformation and can withstand stable high negative pressure (0.5MPa) without being crushed. The dimensions are "locked" by continuous high negative pressure - the details such as the mesh groove and rib structure of the molded board are completely fitted to offset the dimensional deviations caused by curing shrinkage (such as narrowing of width and rib shrinkage).

[0020] Based on existing technology, this invention reduces the size of the first cooling channel and increases the size of the remaining cooling channels, achieving "slow cooling in the front and fast cooling in the back." By using different negative pressure values ​​in the front and rear vacuum channels, it matches the change in state of the hollow board from "flowable" to "rigidly cured," thereby improving product quality and production efficiency.

Claims

1. A water-cooled shaping plate for hollow sheet metal, comprising a substrate, one sidewall of the substrate being a shaping surface, one side of the shaping surface being a feeding end, and the other side being a discharging end, wherein the substrate is provided with a plurality of spaced cooling channels arranged sequentially from the feeding end to the discharging end, the cooling channels being perpendicular to the flow direction of the hollow sheet metal, characterized in that: Starting from the feeding end, the minimum distance from the side wall of the first cooling channel to the shaping surface is 14-16mm, and the minimum distance from the side wall of the remaining cooling channels to the shaping surface is 6-8mm.

2. The hollow sheet water-cooled shaping plate according to claim 1, characterized in that: It also includes vacuum channels opened between adjacent cooling channels. Straight grooves are opened on one side of the shaping surface and reticulated grooves are opened on the other side. The vacuum channel on the side adjacent to the feed end is connected to its corresponding straight groove through multiple vacuum suction ports, and the vacuum channel on the side adjacent to the discharge end is connected to its corresponding reticulated groove through multiple vacuum suction ports.

3. The hollow sheet water-cooled shaping plate according to claim 2, characterized in that: Starting from the feed end, at least three vacuum channels are reserved as independent vacuum channels, and the remaining vacuum channels are connected through transverse holes.

4. The hollow sheet water-cooled shaping plate according to claim 1, characterized in that: The cross-section of the cooling channel is circular or rectangular.

5. The hollow sheet water-cooled shaping plate according to claim 1, characterized in that: The substrate has a chamfered edge at the feed end to facilitate the entry of the hollow board blank into the shaping surface.

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