Microporous resin-metal composite die for wet compression molding of roof tiles
Through the design of microporous resin-metal composite molds, the problems of mold durability and demoulding difficulty in the production of wet mud roof tiles have been solved, achieving efficient and low-cost roof tile production and improving product appearance quality.
Patent Information
- Application Number
- CN202411869326.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-10-10
AI Technical Summary
Existing pressing molds have problems in wet mud roof tile production such as poor durability, difficulty in demoulding and poor appearance quality, especially traditional gypsum molds are easy to wear, metal molds are difficult to demould, and rubber molds have unclear appearance.
A microporous resin-metal composite mold is used. Through the combination of microporous resin material and metal material, a drainage groove and electrophoretic demoulding mechanism are designed to ensure that the mud material is demoulded under the action of the electric field and the residual moisture is sucked out through the drainage groove, combining the high durability of metal materials and the demoulding properties of resin materials.
The high durability of the mold, easy demoulding and efficient production are achieved. The pressed roof tiles have clear edges and corners and three-dimensional sense, which improves production efficiency, reduces costs and extends service life.
Smart Images
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Abstract
Description
Technical Field
[0001] The invention relates to the technical field of ceramic sintered roof tile manufacturing, in particular to a high-efficiency pressing and forming die for wet mud roof tiles. Background Art
[0002] In recent years, wet mud roofing tiles have been widely used in the construction field due to their excellent waterproofness, thermal insulation and aesthetics. The molding process of roofing tiles usually adopts a press molding process, but existing press molds generally have some defects. Although traditional gypsum molds have good demolding effects, they have poor durability, are prone to wear, and are easily deformed in high temperature or humid environments, affecting product quality and production efficiency. On the other hand, metal molds have higher durability and can withstand high-intensity pressing forces, but their demolding effects are poor and often require complex release agents or other auxiliary tools, which increases the complexity and cost of production. Rubber molds are soft in texture and are not easily damaged or stuck during demolding. However, the roofing tiles pressed from them do not have clear edges and corners and the appearance is not three-dimensional enough, resulting in the product's appearance quality failing to meet high standards. This makes rubber molds less than ideal for the production of some high-quality roofing tiles.
[0003] Therefore, there is an urgent need for a pressing mold that maintains the release properties of a plaster mold while offering the high durability of a metal mold, while avoiding the softness of a rubber mold and ensuring the sharp corners and three-dimensional appearance of the pressed roof tiles. This mold can improve production efficiency, reduce production costs, and be easy to operate, thus meeting the needs of modern wet mud roof tile production.
[0004] Based on this, the present invention designs a microporous resin-metal composite mold to solve the above problems. Summary of the Invention
[0005] The present invention aims to provide a mold for pressing and forming wet mud roofing tiles that overcomes the shortcomings of the prior art, particularly by improving the mold's durability, demolding performance, and the appearance quality of the resulting tiles. Specifically, the mold design of the present invention not only achieves excellent demolding performance but also ensures that the resulting tiles possess sharp corners and a three-dimensional appearance, while also extending the mold's service life and ease of operation.
[0006] To achieve the above objectives, the present invention provides a wet mud roof tile pressing and forming mold, which is characterized by: 1. Mold material: made of composite material, the composite material includes a combination of metal material and microporous resin material.
[0007] 2. Mold Structure: The mold consists of an upper mold and a lower mold. The inner wall of the mold cavity is covered with a microporous resin material and is designed with multiple drainage grooves. The metal bodies of the upper and lower molds can be connected to the worktable of the press used to press the roof tiles using bolts or clamps. Terminals for connecting to a DC power supply are installed on the metal surfaces of the upper and lower molds. These terminals can also be installed on the press worktable connected to the mold.
[0008] 3. Manufacturing Method: The metal portion is machined. The microporous resin portion is made by mixing evenly dispersed spherical inorganic particles (such as silica) into the epoxy resin slurry to control the phase separation of the epoxy resin reaction to form a microporous structure. The desired shape is then produced using slip casting. The mold's shape is determined by the roof tile product being produced. The mold can be processed to produce a variety of roof tile products, including arched tiles, flat tiles, Spanish tiles, Japanese tiles, and Chinese-style tiles.
[0009] 4. Working Principle: During the pressing process of roofing tiles, the air in the mold cavity is discharged through the microporous structure and drainage grooves of the resin, allowing the clay to fill the entire mold cavity. Due to the water absorption of the microporous resin, the upper and lower molds are connected to the current. Under the action of the electric field, the clay in the mold cavity produces electrophoresis. Charged colloidal particles in the clay (such as fine soil particles, humus, and microbial cells) migrate under the action of the electric field. Positively charged particles move toward the cathode, while negatively charged particles move toward the anode, causing the moisture in the clay to accumulate at the cathode, forming a water film on the surface of the microporous resin of the lower mold, separating the clay from the mold. The moisture in the upper mold is reduced, and the viscosity of the clay is reduced, thus completing the demolding. After demolding, the residual moisture in the microporous resin is absorbed through the drainage grooves on the surface to avoid affecting the next pressing. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.
[0011] Figure 2 This is a schematic diagram of the overall cross-sectional three-dimensional structure of the present invention Among them: 1-upper mold, 2-lower mold, 3-upper mold positive terminal, 4-drainage groove, 5-lower mold negative terminal, 6-metal frame, 7-microporous resin layer, 8-metal frame. Technological advantages
[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. The electrification process during the working process of the mold can effectively reduce adhesion.
[0013] 2. The high molecular weight of the resin material can further reduce the wetting effect, avoid adhesion, ensure that the roof tiles can be easily demoulded after pressing and forming, and improve production efficiency.
[0014] 3. The drainage groove and microporous material design can effectively absorb residual moisture and improve the continuous working ability of the mold.
[0015] 4. Made of composite materials and metal materials, the mold has strong wear resistance, mechanical strength and corrosion resistance, which greatly extends the service life of the mold.
[0016] 5. The high hardness of the resin material ensures that the pressed roof tiles have clear edges and corners and a three-dimensional sense, with a more exquisite appearance quality, meeting high standards.
[0017] 6. The mold has a simple structure and is easy to operate, eliminating the need for release agents and complex tools, reducing production costs and improving operational efficiency. Actual use has shown that the effective pressing life of the microporous resin-metal composite mold of the present invention can reach 15,000-20,000 times, far exceeding the 500-1,000 times of conventional gypsum molds for roofing tiles. The pressed roofing tile products have a regular appearance, superior to those pressed using rubber molds, and similar in performance to those pressed using gypsum molds. Due to the ease of operation and the lack of the need for release agents, the output of roofing tiles pressed using the microporous resin metal mold of the present invention is 1.8-2.1 times that of conventional metal roofing tile molds.
[0018] The present invention can effectively solve the problems in the prior art such as poor mold durability, difficulty in demoulding, unclear appearance of roof tiles, etc., and has significant technical advantages and broad application prospects.
[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A microporous resin-metal composite mold for wet pressing of roof tiles, characterized in that: The mold is made of a combination of metal material and microporous resin material. The mold includes an upper mold and a lower mold. The inner wall of the mold cavity is covered with microporous resin material and is designed with multiple drainage grooves. The metal bodies of the upper mold and the lower mold are connected to the workbench of the press used to press roof tiles by bolts or clamps.
2. The microporous resin-metal composite mold for wet pressing of roof tiles according to claim 1, characterized in that: The surface of the mold is equipped with a terminal for connecting a DC power supply. The terminal can also be installed on a press workbench connected to the mold.
3. The microporous resin-metal composite mold for wet pressing of roof tiles according to claim 1, characterized in that: The microporous resin part is formed by mixing uniformly dispersed spherical inorganic particles with epoxy resin slurry to form a microporous structure and is manufactured by slip casting.
4. The microporous resin-metal composite mold for wet pressing of roof tiles according to claim 1, characterized in that: During the working process of the mold, the water and charged particles in the clay material are caused to migrate through the action of the electric field, thereby reducing the adhesion between the clay material and the mold, and then achieving demoulding.
5. The microporous resin-metal composite mold for wet pressing of roof tiles according to claim 1, characterized in that: The mold is designed with drainage grooves and microporous structures to discharge excess air in the mold cavity during the pressing process.