Air-permeable and water-permeable structure for mold, foam product steam heating forming mold and mold with outer frame

Abstract

The utility model discloses an air-permeable and water-permeable structure for a mould, a foam product steam heating forming mould and a mould with an outer frame, the air-permeable and water-permeable structure for the mould comprises through holes on the surface of the mould, the through holes are arranged on the surface of the mould in a row and column mode, the row spacing is 1-20mm, the column spacing is 1-20mm, the through holes are strip-shaped gaps, the width is 0.4-1mm, and the length is 2-25mm. The foam product steam heating forming die is a concave-convex die, the die wall thickness of a concave die and a convex die is 5-8 mm, the foam product steam heating forming die is made of A356.2 aluminum alloy, and the surface of the concave die and the surface of the convex die are provided with breathable and water-permeable structures for the die. According to the utility model, the through holes are strip-shaped gaps, are very thin and are densely arranged in rows and columns, so that the structure can greatly enhance the heat conduction and the air and water permeability, the material leakage condition is avoided, the energy consumption is effectively reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of foam product molds, and specifically relates to an air-permeable and water-permeable structure for a mold, a foam product steam heating molding mold, and a mold with an outer frame. Background Art

[0002] Foam products are usually divided into three types according to different materials, such as EPS, EPP, and EPO. The general process of traditional foam product mold production technology is: 1. Woodworking process, using high-density wood boards to make wooden sample models; 2. Casting process, adding raw material alloy aluminum ingots into professional boilers or medium-frequency furnaces, melting the raw materials into aluminum liquid at high temperature, and manually using traditional sand-turning technology to cast the wooden mold model in special casting sand to obtain a mold. After grinding and polishing, it can be put into use. This type of mold is usually a concave and convex mold, and it can be fed into production after the mold is closed. In the specific production process, an outer frame can also be added to the outside of the mold. On the one hand, the outer frame plays the role of fixing the mold, and on the other hand, it is used to enter steam and water to achieve heating and cooling. In the production process of EPS foam boxes, it is usually divided into three stages. The first stage is mold closing, pre-blowing, feeding, and back blowing. The second stage is pressurization, preheating, penetration, and heating. The third stage is insulation, exhaust, cooling, vacuuming, and mold opening to eject the product. Among them, heating, cooling, and vacuuming consume a total of 51.5 seconds. As the market demand for foam products continues to increase, it is very difficult to reduce energy consumption and improve production efficiency.

[0003] A Chinese invention patent discloses an energy-efficient foam rubber mold (application number: 202310573732.9), which uses thin aluminum plate alloy to reduce thickness to improve heat conduction efficiency. Heating, water cooling, and vacuuming take a total of 24 seconds. Although this technology has improved production efficiency to a certain extent, the mold processing process is complicated, involving aluminum plate trimming, flanging, and welding. The processing is difficult, the cost is high, and the stability is average.

[0004] Therefore, it is very necessary to develop a mold with a breathable and water-permeable structure and a foam product steam heating molding mold that can reduce energy consumption and improve production efficiency. Utility Model Content

[0005] The first purpose of the utility model is to provide a breathable and water-permeable structure for a mold.

[0006] The second purpose of the utility model is to provide a foam product steam heating molding mold.

[0007] The third purpose of the utility model is to provide a foam product steam heating molding mold with an outer frame.

[0008] The first purpose of the utility model is achieved in this way, including through holes on the surface of the mold, the through holes are arranged in rows and columns on the surface of the mold, the row spacing is 1 mm~20mm, the column spacing is 1mm~20mm, the through holes are strip-shaped gaps, the width is 0.4mm~1mm, and the length is 2mm~25mm.

[0009] Preferably, the through hole is a laser cut hole.

[0010] The second object of the utility model is achieved in that the mold surface is distributed with the air-permeable and water-permeable structure for the mold.

[0011] The third object of the utility model is achieved in this way: the mold is a concave-convex mold, the mold wall thickness of the concave mold and the convex mold is 5mm~8mm, the material is A356.2 aluminum alloy, and the surface of the concave mold and the convex mold is provided with the air-permeable and water-permeable structure for the mold; A356.2 aluminum alloy, Si: 6.5-7.5, Mg0.30-0.45, Ti≤0.2, Fe≤0.12, Mn≤0.05, Cu≤0.1, Zn≤0.05, Al remainder (%), A356.2 has good fluidity, no hot cracking tendency, small linear shrinkage, good air tightness and other good casting properties, small specific gravity, good corrosion resistance, easy gas welding, the degree of strength reduction with the increase of the wall thickness of the casting is small, it is used in the cast state, and the mechanical properties are improved after deterioration. The ingot fracture is dense, without slag and non-metallic inclusions.

[0012] Preferably, the concave die and the convex die are both die-casting molds. According to the foam packaging specifications required by the market, die-casting machine molds of corresponding specifications can be designed. The die-casting machine molds are made of steel of different specifications and are designed (with different specifications of appearance and different specifications of reinforcing ribs on the back of the workpiece), drawn, processed, ground and polished, and assembled to form.

[0013] The fourth object of the utility model is achieved in that the mold is a concave-convex mold and an outer frame for fixing the concave-convex mold, the outer frame includes an upper outer frame and a lower outer frame, and the upper outer frame and / or the lower outer frame are an integrally formed outer frame.

[0014] The outer frame, also known as an energy-saving water tank, is provided with cooling water pipelines and gas channels inside, and is provided with steam inlet pipe, cooling water inlet pipe, cooling water outlet pipe, lifting ring, ejector port and other components outside. The steam inlet pipe is used to introduce steam, and the steam passes through the mold through-holes to contact and heat the raw materials. The cooling water inlet pipe is used to introduce cooling water to cool the product. The cooling water outlet pipe is used to discharge cooling water. The lifting ring is used to lift the mold outer frame as a whole. The ejector port is used to demold and eject the product. These components and their connection relationships and positional relationships are common knowledge in the field.

[0015] The mold itself can be processed into various shapes according to needs, such as square (to produce square foam boxes), cylindrical (to produce cylindrical foam boxes) and other special shapes (to produce other foam products); after the mold is die-cast and the through holes are cut, the mold is further processed using processing techniques familiar to technicians in this field, such as grinding and polishing, setting screw holes, shaping, heat treatment, and annealing to make the mold more durable. The mold can also be sprayed with a demoulding lubricant familiar to technicians in this field, and then baked and cured at high temperature to make the foam product easier to demold.

[0016] Compared with the prior art, the utility model has the following technical effects:

[0017] 1. The utility model mold uses a breathable and water-permeable structure. The through holes are strip-shaped gaps, which are very thin and densely arranged in rows and columns. This structure can greatly enhance heat conduction and breathable and water-permeable performance. The through holes are cut by laser, which replaces the traditional manual drilling and manual knocking of the air plug. The processing is more precise and ensures efficient breathable and water-permeable effects.

[0018] 2. The steam heating mold for foam products of the utility model adopts die casting, with smooth appearance, high density, no pores, no impurities, uniform wall thickness and good firmness; the mold wall thickness is 5mm~8mm, with good thermal conductivity, and the utility model mold uses a breathable and water-permeable structure to further enhance the thermal conductivity, no leakage occurs, and energy saving is 10%~15%. Heating, water cooling and vacuuming can be completed in 20 seconds, and the entire processing technology can be completed in 67 seconds, which greatly improves production efficiency;

[0019] 3. The utility model adopts a steam-heated foam product forming mold with an outer frame, wherein the upper outer frame and the lower outer frame are formed in one piece, and there is no screw splicing, which completely solves the problem of screw splicing in traditional processes, avoids the problem of easy leakage at the splicing during the production process, and solves the problem that the production was more troublesome in the past due to the need for bolt assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the air-permeable and water-permeable structure of the mold of the utility model;

[0021] Figure 2 It is a schematic diagram of the mold-closing structure of the concave and convex mold;

[0022] Figure 3 It is a schematic diagram of the local cross-sectional structure of the punch;

[0023] Figure 4 It is a schematic diagram of the structure of a mold with an outer frame for steam heating and molding foam products;

[0024] In the figure: 1-through hole, 2-die, 3-punch, 4-upper outer frame, 5-lower outer frame, 6-steam inlet pipe, 7-cooling water inlet pipe, 9-lifting ring. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or substitutions made based on the teachings of the present invention belong to the protection scope of the present invention.

[0026] Example 1

[0027] As attached Figure 1 As shown, the air-permeable and water-permeable structure of the mold in this embodiment includes through holes 1 on the surface of the mold. The through holes 1 are arranged in rows and columns on the surface of the mold with a row spacing of 1 mm and a column spacing of 1 mm. The through holes 1 are strip-shaped gaps with a width of 0.4 mm and a length of 2 mm.

[0028] Example 2

[0029] The air-permeable and water-permeable structure for the mold in this embodiment is based on that in embodiment 1, except that the row spacing is 20 mm, the column spacing is 20 mm, the width is 1 mm, and the length is 25 mm, the rest is the same as that in embodiment 1.

[0030] Example 3

[0031] The air-permeable and water-permeable structure for the mold in this embodiment is based on the embodiment 1, wherein the through hole 1 is cut by laser, and the row spacing is 10.5 mm, the column spacing is 10.5 mm, the width is 0.7 mm, and the length is 13.5 mm. The rest is the same as the embodiment 1; wherein the laser cutting is to place the workpiece on a scanning laser cutting machine for laser cutting. Example

[0032] The foam product of this embodiment is formed by steam heating, and the air-permeable and water-permeable structure used in the mold of embodiment 1 is distributed on the surface of the mold.

[0033] Example 5

[0034] As attached Figure 2 ~Attached Figure 3 As shown, the foam product steam heating molding mold of this embodiment is a concave-convex mold. The mold wall thickness of the concave mold 2 and the punch 3 is 5 mm. The material is A356.2 / A00 / A04 / 101-118 casting alloy material. The surface of the concave mold 2 and the punch 3 is provided with a breathable and water-permeable structure used in the mold of embodiment 1.

[0035] Example 6

[0036] The foam product steam heating molding mold of this embodiment is based on the embodiment 5, wherein the mold wall thickness of the concave mold 2 and the convex mold 3 is 8 mm, and the surface of the concave mold 2 and the convex mold 3 is provided with an air-permeable and water-permeable structure used in the mold of embodiment 2.

[0037] Example 7

[0038] The steam-heated forming mold for foam products in this embodiment is based on the embodiment 5, wherein the mold wall thickness of the concave mold 2 and the punch 3 is 6.5 mm, and the surfaces of the concave mold 2 and the punch 3 are provided with an air-permeable and water-permeable structure used in the mold of embodiment 3, and the concave mold 2 and the punch 3 are both die-casting molds; for the die-casting mold, the designed die-casting machine mold is installed on the die-casting machine, and the metal material is melted into a qualified molten metal in a high-frequency analysis furnace, and the molten metal is input into a high-low die-casting machine, and the concave mold 2 and the punch 3 are obtained by die-casting.

[0039] Example 8

[0040] As attached Figure 4 As shown, the foam product steam-heated molding mold with an outer frame in this embodiment is the concave-convex mold of Example 7 and the outer frame for fixing the concave-convex mold. The outer frame includes an upper outer frame 4 and a lower outer frame 5. The upper outer frame 4 and the lower outer frame 5 are integrally molded outer frames.

[0041] Example 9

[0042] In order to overcome the above-mentioned defects of the common technical processes in the market, the embodiment of this utility model provides a new technology for die-casting an efficient and energy-saving foam packaging box mold, and the process technology includes:

[0043] 1: The innovation lies in the development of new die-casting molds of different specifications based on all the foam packaging specifications in the market. The die-casting molds are made of steel of different specifications and are designed (with different specifications of appearance and different specifications of reinforcing ribs on the back of the workpiece), drawn, processed, polished, assembled and formed;

[0044] 2: Install the die-casting mold on the die-casting machine to die-cast the desired foam mold internals, replacing the previous traditional process, manual model making, and manual casting. The die-cast products have smooth appearance, high density, long service life, uniform wall thickness, and good heat transfer. The range of foam mold internals is divided into a series of foam packaging molds on the market. The mold internals use casting alloy materials with raw material codes of A356.2 / A00 / A04 / 101--118 to enter the advanced high-frequency analysis furnace to melt the qualified aluminum liquid, and the aluminum liquid is automatically input into the high and low die-casting machine. After thousands of tons of force die-casting, the molded product has a wall thickness of 6 mm-7mm, no pores, no impurities, uniform wall thickness, and good firmness.

[0045] 3. Place the die-cast workpiece on a scanning laser cutting machine dedicated to aluminum to cut the exhaust strip slits with a width of 0.4mm-1mm and a length of 2mm-25mm, replacing the manual drilling and manual knocking of the gas plug in the traditional process. Secondly, because the workpiece adopts a new die-casting process, it is particularly durable, and the spacing of the cutting gap is controlled between 1mm-20mm. The appearance is particularly beautiful, and the fuel cost of producing foam packaging boxes is lower than that of traditional ordinary foam molds. The heating is particularly uniform, the penetration type is good, and the cooling time, heating time and feeding time are increased at the same time, the production cost is greatly reduced, and the production efficiency is improved;

[0046] 4: Grind and polish the workpieces of different shapes, make the screw holes in the same position on the inner parts of each mold, so that the inner parts of the mold can be uniformly changed regardless of the serial number, which reduces the time for subsequent mold maintenance and labor costs. After the screw positions are arranged, the cut workpieces are shaped to keep all workpieces balanced. Then the workpieces are placed in a 600℃ heat treatment equipment for heat treatment. After the heat treatment is completed, the workpieces are placed in a water cooling equipment for annealing to strengthen the workpieces and increase the service life of the mold. After a series of treatments are done on the workpieces, a demoulding lubricant is sprayed on the surface of the workpieces, and then put into the oven for baking. The workpieces reach a certain temperature in the oven, making the molds particularly smooth and easy to demould during the production process, controlling waste and saving costs;

[0047] 5: The mold is divided into an outer frame and inner parts. The outer frame is formed in an integrated manner. The outer frame is also called an energy-saving water tank. The energy-saving water tank and the processed inner parts are combined with screws, and some water-cooled copper pipes are arranged. In the process of producing foam products, the raw material of the foam product is eps raw material foam particles. Steam heating is required to solidify the foam particles into one, and then water cooling is required. The mold is divided into a concave mold and a convex mold. According to different products, a feed port and a push rod for the product can be opened on either side of the concave mold and the convex mold to ensure that the product is fed, heated, cooled, and ejected from the ejector rod until qualified products are ejected.

Claims

1. A breathable and water-permeable structure for a mold, comprising a through hole (1) on the surface of the mold, characterized in that The through holes (1) are arranged in rows and columns on the mold surface, with a row spacing of 1 mm to 20 mm and a column spacing of 1 mm to 20 mm. The through holes (1) are strip-shaped gaps with a width of 0.4 mm to 1 mm and a length of 2 mm to 25 mm.

2. The air-permeable and water-permeable structure for mold according to claim 1, characterized in that The through hole (1) is a laser cut hole.

3. A foam product steam heating molding mold, characterized in that The mold surface is distributed with the air-permeable and water-permeable structure for the mold as described in any one of claims 1 to 2.

4. A foam product steam heating molding mold, the mold is a concave-convex mold, characterized in that The mold wall thickness of the concave mold (2) and the punch mold (3) is 5 mm to 8 mm, and the material is A356.2 aluminum alloy. The surface of the concave mold (2) and the punch mold (3) is provided with a breathable and water-permeable structure for the mold as described in any one of claims 1 to 2.

5. The foam product steam heating forming mold according to claim 4, characterized in that The concave die (2) and the convex die (3) are both die-casting molds.

6. A foam product steam heating molding mold with an outer frame, the mold is a concave and convex mold and an outer frame for fixing the concave and convex mold, characterized in that The concave-convex mold is the concave-convex mold according to any one of claims 4 to 5, and the outer frame comprises an upper outer frame (4) and a lower outer frame (5), and the upper outer frame (4) and / or the lower outer frame (5) are integrally formed outer frames.

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