A composite mold for ceramic cup forming
By designing a composite mold and combining the outer and inner structural layers, the problems of easy mold wear and uneven stress distribution are solved, achieving long mold life and low-cost ceramic cup molding, and improving molding accuracy and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LILING JINGGONG PORCELAIN CO LTD
- Filing Date
- 2025-05-09
- Publication Date
- 2026-07-03
AI Technical Summary
Existing ceramic cup forming molds are prone to wear and cracking during the rolling process, resulting in a short service life, high material costs, and uneven stress distribution, which affects forming accuracy and efficiency.
The mold design employs a composite structure layer consisting of an outer and inner structural layer, with the outer structural layer made of a high-strength material (such as stainless steel) and the inner structural layer made of a water-absorbing and breathable material (such as gypsum or acrylic resin). A buffer layer is placed between the outer and inner structural layers to optimize stress distribution and extend service life.
By leveraging the complementary properties of the outer and inner structural layers, the service life of the mold is extended, material costs are reduced, the mold's fatigue resistance and stress distribution uniformity are improved, ensuring molding accuracy and efficiency.
Smart Images
Figure CN224446293U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of clay molding mold technology, specifically a composite mold for molding ceramic cups. Background Technology
[0002] Throwing, slip casting, roll forming, and hand-molding are all methods of forming ceramic cups. Among them, roll forming has the advantages of high production efficiency, good product quality, and high body strength compared to other ceramic cup forming methods, and is therefore widely used.
[0003] Roll forming involves the relative movement of a roller head on a roller press and a mold holding the clay, applying pressure to the clay and causing it to gradually deform under pressure, conforming to the shape of the mold to form the desired ceramic body. To accelerate the curing and molding process and facilitate demolding, existing molds are typically made of porous, absorbent materials such as plaster or acrylic resin. However, during roll forming, the mold must withstand the pressure from the roller head and the friction from the clay. Existing molds are prone to wear and cracking during use. To ensure molding accuracy, the mold needs to be replaced once the wear exceeds a certain range, resulting in a short mold lifespan and high material costs. Utility Model Content
[0004] The purpose of this invention is to provide a composite mold for forming ceramic cups, so as to solve at least one of the problems mentioned in the background art.
[0005] This utility model provides a composite mold for forming ceramic cups, including an outer structural layer and an inner structural layer coaxially fitted together. At least one end of the outer structural layer is an open structure, one end of the inner structural layer is closed, and the other end is an open structure. The open end of the inner structural layer forms a mold cavity inside, and the strength of the outer structural layer is higher than that of the inner structural layer.
[0006] A further proposed solution: the outer structural layer is made of metal, and the inner structural layer is made of a water-absorbing and breathable material.
[0007] A further embodiment: the outer structural layer is made of stainless steel, and the inner structural layer is made of one or both of gypsum and acrylic resin.
[0008] A further solution: a buffer layer is provided inside the outer structural layer and / or inside the inner structural layer and / or between the outer structural layer and the inner structural layer.
[0009] A further embodiment: The inner wall of the outer structural layer at one closed end of the inner structural layer is provided with a step, the step protruding from the inner wall of the outer structural layer, and the outer wall of the closed end of the inner structural layer is provided with a first groove corresponding to the step.
[0010] A further embodiment: The outer structural layer has a second groove on its sidewall, and a stacked first shoulder and a second shoulder are embedded in the second groove. Both the first shoulder and the second shoulder are coaxially installed with the outer structural layer.
[0011] A further option: the second shoulder is located on the side of the first shoulder away from the open end of the inner structural layer, and the outer diameter of the first shoulder is larger than the outer diameter of the second shoulder.
[0012] A further embodiment: The outer structural layer sidewall is formed with a third shoulder, the third shoulder is located on the side of the second groove away from the open end of the inner structural layer, the third shoulder is frustoconical, and the larger end of the third shoulder abuts against the second shoulder.
[0013] A further solution: The mold cavity is provided with a bottom pad at the closed end of the inner structural layer.
[0014] A further option: the outer circumferential surface of the base pad is an arc surface.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0016] 1. By forming a composite mold through the outer and inner structural layers, complementary performance can be achieved. The outer structural layer ensures that at least one end of the inner structural layer is open. When the inner structural layer wears and cracks, it can be directly broken and removed through the open end of the outer structural layer. The inner structural layer can then be reshaped on the inner wall of the outer structural layer, reducing waste and lowering material costs.
[0017] 2. Optimize the stress distribution of the mold during use. When the mold is subjected to external forces or temperature changes, the inner and outer structural layers will restrain each other, making the stress distribution more uniform, thereby improving the mold's load-bearing capacity and resistance to deformation. The internal interface between the inner and outer structural layers can hinder the propagation of fatigue cracks, thereby improving the mold's fatigue resistance and extending its service life. Attached Figure Description
[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.
[0019] Figure 1 This is a schematic diagram of the structure of a preferred embodiment of the present invention;
[0020] Figure 2 This is a longitudinal sectional view of a preferred embodiment of the present invention;
[0021] Figure 3 This is a longitudinal sectional view of another preferred embodiment of the present invention.
[0022] In the diagram: 1-Outer structural layer; 2-Inner structural layer; 3-First shoulder; 4-Second shoulder; 5-Third shoulder; 6-Bottom pad; 7-Step; 8-Mold cavity. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0025] In the description of this utility model, it should be understood that the use of terms such as "first" and "second" to define the components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model.
[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0027] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0028] Please see Figure 1 , Figure 2 As shown, this embodiment provides a composite mold for forming ceramic cups, including an outer structural layer 1 and an inner structural layer 2 coaxially fitted. The outer structural layer 1 has at least one open structure, the inner structural layer 2 has one closed end and the other open structure, and a mold cavity 8 is formed inside the open end of the inner structural layer 2. The strength of the outer structural layer 1 is higher than that of the inner structural layer 2.
[0029] Using a high-strength outer structural layer 1 to cover the outside of the inner structural layer 2, compared to a single-material mold under the same working conditions, can reduce the wall thickness of the inner structural layer 2, or even the entire mold. The outer structural layer 1 is usually not damaged and can be recycled. Only the inner structural layer 2 is damaged. The outer structural layer 1 ensures that at least one end of the inner structural layer 2 is open. When the inner structural layer 2 wears and cracks, it can be directly broken and removed through the open end of the outer structural layer. The inner structural layer 2 can then be reconstructed on the inner wall of the outer structural layer 1, reducing waste and lowering material costs.
[0030] Furthermore, the stress distribution of the composite mold during use is optimized. When the composite mold is subjected to external forces or temperature changes, the inner structural layer 2 and the outer structural layer 1 will restrain each other, resulting in a more uniform stress distribution and thus improving the load-bearing capacity and deformation resistance of the composite mold. The internal interface between the inner structural layer 2 and the outer structural layer 1 can hinder the propagation of fatigue cracks, thereby improving the fatigue resistance of the mold and extending its service life.
[0031] It should be noted that the outer structural layer 1 can adopt an open structure at both ends, which facilitates the removal of the failed inner structural layer 2 by breaking it, and avoids the inner structural layer 2 remaining in the outer structural layer 1, thus affecting the injection quality of the new inner structural layer 2.
[0032] Preferably, the outer structural layer 1 is made of metal, and the inner structural layer 2 is made of a water-absorbing and breathable material.
[0033] Specifically, the outer structural layer 1 is made of stainless steel. The inner structural layer 2 is made of one or both of gypsum and acrylic resin.
[0034] It should be noted that the outer structural layer 1 is not limited to a single-layer structure; it can also be a multi-layer structure. Similarly, the inner structural layer 2 is not limited to a single-layer structure; it can also be a multi-layer structure. Preferably, a buffer layer can be provided within the outer structural layer 1 and / or within the inner structural layer 2 and / or between the outer structural layer 1 and the inner structural layer 2.
[0035] It should be noted that, in order to ensure the structural strength of the composite mold, both ends of the outer structural layer 1 and the inner structural layer 2 are flush to avoid creating weak points that could affect the service life of the composite mold.
[0036] In some embodiments, please refer to Figure 3 As shown, the outer structural layer 1 has a step 7 on the inner wall of the closed end of the inner structural layer 2. The step 7 protrudes from the inner wall of the outer structural layer 1, and the outer wall of the closed end of the inner structural layer 2 has a first groove corresponding to the step 7. Since both ends of the outer structural layer 1 are open, the step 7 and the first groove cooperate to prevent axial slippage between the outer structural layer 1 and the inner structural layer 2.
[0037] In some embodiments, please refer to Figures 1-3 As shown, the outer structural layer 1 has a second groove on its sidewall, into which stacked first shoulders 3 and second shoulders 4 are embedded. Both first shoulders 3 and second shoulders 4 are coaxially mounted with the outer structural layer 1. The composite mold is secured within a transmission device in a hole in the working platform via the first shoulders 3 and second shoulders 4. A rotating lifting device at the bottom of the hole allows the composite mold to be ejected from the hole along with the transmission device, brought close to the rolling die head, and kept rotating to facilitate the rolling forming of the ceramic cup. The first shoulders 3 and second shoulders 4, embedded in the sidewall of the outer structural layer 1, enhance their strength, reduce stress concentration, and prevent deformation.
[0038] Preferably, the second shoulder 4 is located on the side of the first shoulder 3 away from the open end of the inner structural layer 2, and the outer diameter of the first shoulder 3 is larger than the outer diameter of the second shoulder 4. The outer diameter of the second shoulder 4 is approximately equal to the inner diameter of the transmission device. When the composite mold and the transmission device are coaxially installed, the outer wall of the second shoulder 4 contacts the inner wall of the transmission device, the first shoulder 3 is located outside the transmission device, and the bottom of the first shoulder 3 contacts the top of the transmission device, thus achieving accurate installation of the composite mold, preventing the composite mold from shaking inside the transmission device, and facilitating accurate application of ceramic clay.
[0039] Furthermore, the outer structural layer 1 has a third shoulder 5 formed on its sidewall. The third shoulder 5 is located on the side of the second groove away from the open end of the inner structural layer 2. The third shoulder 5 is frustoconical, and its larger end abuts against the second shoulder 4. The third shoulder 5 serves as a guide, facilitating the correct placement of the composite mold within the transmission device and ensuring the coaxiality of the composite mold and the rotary lifting device, thereby ensuring the coaxiality of the composite mold and the rolling die head.
[0040] In some embodiments, please refer to Figure 2 , Figure 3 As shown, the mold cavity 8 has a bottom pad 6 at the closed end of the inner structural layer 2 to facilitate the formation of the cup bottom shape. Preferably, the outer peripheral surface of the bottom pad 6 is curved to facilitate demolding.
[0041] In some embodiments, the first shoulder 3 and the second shoulder 4 can be integrally formed with the outer structural layer 1 for easy processing.
[0042] It should be noted that the first shoulder 3, the second shoulder 4, and the outer structural layer 1 can all be reused. The outer structural layer 1 is placed upside down on the platform, with the first shoulder 3 and the second shoulder 4 at the bottom. A mold with the same shape as the ceramic cup is placed coaxially inside the outer structural layer 1. The mouth of the mold with the same shape as the ceramic cup is placed on the platform. The inner structural layer 2 is then cast into the outer structural layer 1. After drying and hardening, the mold with the same shape as the ceramic cup is removed, thus completing the production of the composite mold. The production is simple, greatly reducing the material input of the inner structural layer 2, saving mold costs, reducing waste generation, and reducing the impact on the environment.
[0043] A composite mold is applied to a rolling mill for producing ceramic cups. The rolling mill utilizes existing technology, including a working platform, a rotary lifting device, and a rolling die head. A feeding device, also existing technology, is installed to feed material to the composite mold. During production, the composite mold is correctly placed within the transmission device in the hole of the working platform. An appropriate amount of ceramic clay is fed into the mold cavity 8 via the feeding device. A rotary lifting device is located at the bottom of the hole, and a rolling die head is located above it. The rotary lifting device lifts the composite mold, ejecting it from the hole along with the transmission device and driving it to rotate. The rolling die head also descends and extends into the mold cavity 8, "rolling" and "pressing" the ceramic clay. Under the action of centrifugal force and pressure, the ceramic clay is extruded and shaped, gradually conforming to the shape of the mold to form the ceramic cup blank, achieving the rolling forming of the ceramic cup. Subsequently, the rotary lifting device lowers the composite mold back into the hole, awaiting the drying of the blank. The rotation of the composite mold allows for more uniform relative movement between the rolling die and the composite mold, ensuring a more even distribution of the ceramic clay within the mold and contributing to the formation of ceramic blanks with uniform wall thickness and regular shapes. Simultaneously, the rotation of the composite mold also allows for more stable and uniform pressure applied to the ceramic clay by the rolling die, resulting in higher density of the blank and improved product quality.
[0044] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.
Claims
1. A composite mold for forming a ceramic cup, characterized by, It includes an outer structural layer and an inner structural layer of a coaxial assembly. The outer structural layer has at least one open end, the inner structural layer has one closed end and the other open end. The open end of the inner structural layer forms a mold cavity. The strength of the outer structural layer is higher than that of the inner structural layer.
2. The composite mold for forming a ceramic cup according to claim 1, wherein The outer structural layer is made of metal, and the inner structural layer is made of water-absorbing and breathable material.
3. A composite mold for forming a ceramic cup according to claim 2, wherein The outer structural layer is made of stainless steel.
4. The composite mold for forming a ceramic cup according to claim 1 or 2 or 3, wherein A buffer layer is provided inside the outer structural layer and / or inside the inner structural layer and / or between the outer structural layer and the inner structural layer.
5. The composite mold for ceramic cup forming according to claim 1, wherein The outer structural layer has a step on the inner wall of the closed end of the inner structural layer, the step protruding from the inner wall of the outer structural layer, and the outer wall of the closed end of the inner structural layer has a first groove corresponding to the step.
6. The composite mold for ceramic cup forming according to claim 1, wherein The outer structural layer has a second groove on its sidewall, and a stacked first shoulder and second shoulder are embedded in the second groove. Both the first shoulder and the second shoulder are coaxially installed with the outer structural layer.
7. A composite mold for forming ceramic cups according to claim 6, characterized in that, The second shoulder is located on the side of the first shoulder away from the open end of the inner structural layer, and the outer diameter of the first shoulder is larger than the outer diameter of the second shoulder.
8. A composite mold for forming a ceramic cup according to claim 6 or 7, wherein The outer structural layer has a third shoulder formed on its sidewall. The third shoulder is located on the side of the second groove away from the open end of the inner structural layer. The third shoulder is truncated cone-shaped, and the larger end of the third shoulder abuts against the second shoulder.
9. The composite mold for ceramic cup forming according to claim 1, wherein The mold cavity is located at the closed end of the inner structural layer and has a bottom pad.
10. The composite mold for ceramic cup forming according to claim 9, wherein The outer circumferential surface of the base pad is curved.