A surimi forming mold

Abstract

The utility model discloses a kind of surimi forming mould, including mould body, cooling runner is set in its inside, runner inlet and outlet are connected with liquid inlet valve and discharge valve respectively;Forming cavity inner surface and mould body upper end outer surface are provided with Teflon functional layer, transition layer is equipped between the functional layer and mould base;Cooling runner inner wall is equipped with hemispherical convex array;Teflon functional layer evenly disperses with food-grade bacteriostatic agent particle.This utility model realizes the efficient uniform cooling of surimi product by built-in profiling cooling runner and turbulence structure;Through the composite coating structure of "base rough surface-transition layer-Teflon functional layer", the durability of non-stick coating under harsh working conditions is ensured;While giving mould surface active antibacterial function.Three combinations, technical problems such as difficult demoulding, slow cooling, easy to breed bacteria are comprehensively solved, and product quality, production efficiency and sanitary safety level are improved.

Description

Technical Field

[0001] This utility model relates to the field of surimi product technology, specifically a surimi forming mold. Background Technology

[0002] Surimi products (such as fish balls, fish cakes, and fish tofu) are traditional and widely consumed foods in my country. In industrial production, surimi forming molds are one of the key pieces of equipment, and their performance directly affects the appearance, texture, hygiene and safety of the products, as well as production efficiency.

[0003] Currently, common fish paste forming molds still have the following prominent technical problems in practical use: First, difficulty in demolding easily leads to product defects. The surimi raw material is highly viscous and easily sticks to the mold cavity after molding. Demolding often requires significant external force, which is not only cumbersome and disrupts production rhythm, but also easily causes surface damage, shape defects, or cracks, affecting the yield rate and appearance consistency of the finished product. Although some molds attempt to spray non-stick coatings (such as Teflon) onto the cavity surface, due to the difference in thermal expansion coefficients between the metal substrate and the coating, and insufficient adhesion, the coating is prone to peeling and blistering under long-term thermal cycling and mechanical friction, making it difficult to maintain a stable non-stick effect.

[0004] Secondly, the cooling and setting process is inefficient. After molding, the fish paste typically requires cooling to enhance gel strength, facilitate demolding, and allow for subsequent processing. Traditional methods often rely on external cooling (such as placing it in a low-temperature workshop or cold storage), which is slow, takes up a lot of space, and prolongs the production cycle.

[0005] Secondly, there are potential hygiene and safety concerns. Molds, especially the cavity surfaces, are prone to developing dirt and microbial growth after prolonged contact with moist, protein-rich surimi raw materials. Conventional cleaning and disinfection methods are insufficient to completely eliminate these microorganisms, posing a risk of cross-contamination and a potential threat to the microbiological safety of the food.

[0006] Therefore, we propose a fish paste forming mold. Utility Model Content

[0007] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a surimi molding mold. By incorporating a built-in high-efficiency cooling channel and a Teflon composite coating with strong adhesion and containing antibacterial agents, it effectively solves three major technical problems in the surimi molding process: difficulty in demolding, low cooling efficiency, and easy bacterial growth. This improves product quality, production efficiency, and hygiene and safety, and can effectively solve the problems in the background technology.

[0008] (II) Technical Solution To achieve the above objectives, the technical solution adopted by this utility model is as follows: a surimi molding mold, comprising a mold body made of metal, a molding cavity provided on the mold body, a cooling channel provided inside the mold body, an inlet valve and a outlet valve extending out of the mold body respectively connected to the inlet and outlet of the cooling channel; a Teflon functional layer is provided on the inner surface of the molding cavity and the upper outer surface of the mold body; a transition layer for enhancing bonding is also provided between the Teflon functional layer and the base of the mold body; a hemispherical array of protrusions for disrupting the flow of coolant to enhance heat exchange is provided on the inner wall of the cooling channel; food-grade antibacterial agent particles are uniformly dispersed in the material of the Teflon functional layer.

[0009] Preferably, the contact surface between the base of the mold body and the transition layer is provided with a sandblasted rough surface to increase the bonding surface area.

[0010] Preferably, the transition layer is a nickel-based alloy layer, a ceramic layer, or a metal oxide layer formed by a thermal spraying process.

[0011] Preferably, the cooling channel is arranged to follow the contour of the molding cavity, and the distribution density of the discharge valve is increased in areas with greater material thickness in the projection plane of the molding cavity.

[0012] Preferably, the food-grade antibacterial agent particles are nano-sized particles, and their mass fraction in the Teflon functional layer is 0.1% to 3%.

[0013] Preferably, the thickness of the transition layer is 30 micrometers to 150 micrometers, and the thickness of the Teflon functional layer is 15 micrometers to 60 micrometers.

[0014] The ratio of the thickness of the Teflon functional layer to the thickness of the transition layer is 1:2 to 1:4.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a fish paste forming mold, which has the following beneficial effects: 1. This surimi molding mold has a Teflon functional layer on the molding cavity and upper outer surface of the mold body. Its extremely low surface energy provides excellent non-stick properties, allowing the surimi product to be easily and naturally separated from the mold after molding, thus improving the surface damage or shape defects of the product caused by demolding operations. More importantly, by setting a transition layer and forming a sandblasted rough surface on the substrate contact surface, the bonding force and mechanical interlocking force between the Teflon functional layer and the metal substrate are enhanced, ensuring the adhesion stability and durability of the non-stick coating under harsh conditions of long-term hot and cold cycles and mechanical friction.

[0016] 2. This surimi forming mold has a cooling channel inside the mold body, and is equipped with an inlet valve and an outlet valve, so that the cooling medium (such as water or refrigerant) can circulate directly inside the mold, realizing in-situ and direct cooling of the surimi product. This built-in cooling method has a short heat conduction path and high efficiency. Furthermore, the hemispherical protrusion array set on the inner wall of the cooling channel acts as a turbulence structure, which can effectively disrupt the laminar flow state of the coolant, enhance the turbulence effect, and thus enhance the heat exchange efficiency.

[0017] 3. This surimi molding mold has food-grade antibacterial agent particles evenly dispersed in the Teflon functional layer material; this makes the mold surface not only non-stick, but also has the function of continuously inhibiting the growth of bacteria, mold and other microorganisms. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a fish paste forming mold according to the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of a fish paste forming mold after removing the inlet valve and the outlet valve.

[0020] Figure 3 This utility model relates to a fish paste forming mold. Figure 2 Enlarged view of point A in the middle.

[0021] Figure 4 This is an exploded view of the structure of a fish paste forming mold according to this utility model.

[0022] In the diagram: 1. Mold body; 2. Molding cavity; 3. Liquid inlet valve; 4. Discharge valve; 5. Cooling channel; 6. Hemispherical protrusion array; 7. Transition layer; 8. Teflon functional layer; 9. Food-grade antibacterial agent particles. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] like Figure 1-4 As shown, the mold includes a mold body 1. The mold body 1 is made of a metal material with good thermal conductivity, such as aluminum alloy or stainless steel. The mold body 1 is provided with a molding cavity 2 for receiving and shaping the surimi raw material. To improve the cooling and shaping efficiency of the surimi product, a cooling channel 5 is provided inside the mold body 1. The inlet and outlet of the cooling channel 5 are respectively connected to an inlet valve 3 and an outlet valve 4 extending out of the mold body 1, for connecting to an external coolant circulation system, so that the cooling medium (such as cooling water or food-grade refrigerant) can be forced to circulate inside the mold.

[0025] To achieve excellent and durable demolding performance, a Teflon functional layer 8 is provided on the entire inner surface of the molding cavity 2 and the upper outer surface of the mold body 1. Teflon (polytetrafluoroethylene, PTFE) has extremely low surface energy and a low coefficient of friction, effectively preventing fish paste adhesion. To enhance the bonding force between the Teflon functional layer 8 and the metal mold body 1 (substrate) and prevent the coating from peeling off under thermal stress or mechanical action, a transition layer 7 is also provided between the Teflon functional layer 8 and the substrate of the mold body 1. This transition layer 7 is formed through processes such as thermal spraying, and the material can be a nickel-based alloy, ceramic, or metal oxide. Its coefficient of thermal expansion is between that of the base metal and Teflon, serving as a buffer and reinforcing agent. To further enhance the cooling effect, a regularly arranged array of hemispherical protrusions 6 is provided on the inner wall of the cooling channel 5. These protrusions 6 effectively disrupt the laminar flow state of the coolant, enhance turbulence, thereby disrupting the boundary layer and significantly improving the convective heat transfer coefficient. In addition, food-grade antibacterial agent particles 9 are pre-dispersed uniformly in the material (coating or powder) of the Teflon functional layer 8 before the coating is produced, so that the molded surface has both physical non-stick and active antibacterial functions.

[0026] In a preferred embodiment of this invention, to further ensure the bonding strength between the transition layer 7 and the substrate of the mold body 1, the contact surface between the substrate of the mold body 1 and the transition layer 7 is pre-treated by sandblasting to form a sandblasted rough surface 10 with a microscopic uneven structure. This rough surface 10 increases the actual contact surface area and mechanical interlocking force between the transition layer 7 material and the substrate, making the coating system more robust.

[0027] In this invention, the transition layer 7 is preferably a nickel-based alloy layer, a ceramic layer, or a metal oxide layer formed by a thermal spraying process (such as arc spraying or plasma spraying). These materials themselves have high bonding strength and good heat resistance, and are key intermediate layers for achieving firm adhesion of the Teflon coating.

[0028] To achieve more uniform and efficient cooling of all parts of the surimi product, the cooling channels 5 are arranged to follow the contour of the forming cavity 2, meaning the channel direction roughly follows the shape of the forming cavity 2 to ensure uniform cooling. Specifically, in the projection plane of the forming cavity 2, the distribution density of the cooling channels 5 is increased in areas with a greater thickness of surimi material (such as the product center or thicker sections). This means that in these areas, the channel loops are denser or the channel cross-sections are wider to provide stronger cooling capacity, balance the cooling rate of the entire product, and prevent external cooling and internal heating.

[0029] The food-grade antibacterial agent particles 9 are preferably nano-sized particles to ensure more uniform dispersion in the coating without affecting the smoothness of the coating surface. Their mass fraction in the Teflon functional layer 8 is controlled within the range of 0.1% to 3%. This addition amount ensures effective antibacterial performance without adversely affecting the physical properties and food safety of the Teflon coating. The antibacterial agent can be a recognized safe food contact material such as nano-silver or nano-zinc oxide.

[0030] Regarding the coating thickness, the thickness of the transition layer 7 is preferably between 30 micrometers and 150 micrometers. This thickness range provides sufficient bonding strength and stress buffering capacity without being too thick, which would lead to excessive cost or internal stress. The thickness of the Teflon functional layer 8 is preferably between 15 micrometers and 60 micrometers. This thickness is sufficient to provide a complete, dense, non-stick surface while maintaining good thermal conductivity. More preferably, the ratio of the thickness of the Teflon functional layer 8 to the thickness of the transition layer 7 is controlled between 1:2 and 1:4. This ratio helps to optimize the support and bonding effect of the transition layer while ensuring the functionality of the Teflon functional layer, thus achieving a better balance of durability for the entire composite coating system.

[0031] Working Principle: During use, the prepared surimi raw material is filled into the molding cavity 2 of the mold. After molding, a low-temperature cooling medium can be immediately introduced into the cooling channel 5 through the inlet valve 3 and the outlet valve 4. When the cooling medium flows through the cooling channel 5, which is arranged in a contoured manner and has a hemispherical protrusion array 6 on its inner wall, it undergoes efficient heat exchange with the mold body 1, thereby quickly removing the heat from the surimi product and allowing it to gel and solidify. Due to the presence of the Teflon functional layer 8, the solidified surimi product can be easily and completely removed from the molding cavity 2 with a smooth and undamaged surface. The antibacterial agent particles 9 uniformly dispersed in the Teflon functional layer 8 can continuously release antibacterial components, effectively inhibiting the growth of surface microorganisms. Combined with regular cleaning, this can improve the hygiene and safety level of the mold. The entire coating system, reinforced by the transition layer 7 and the rough surface of the substrate 10, can withstand repeated hot and cold cycles and cleaning friction during production, resulting in a long service life.

[0032] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A fish paste forming mold, comprising a mold body (1), wherein the mold body (1) is made of metal, and a forming cavity (2) is provided on the mold body (1), characterized in that: The mold body (1) has a cooling channel (5) inside. The inlet and outlet of the cooling channel (5) are respectively connected to the liquid inlet valve (3) and the liquid outlet valve (4) extending out of the mold body (1). The inner surface of the molding cavity (2) and the upper outer surface of the mold body (1) are provided with Teflon functional layers (8). A transition layer (7) for enhancing the bonding force is also provided between the Teflon functional layer (8) and the substrate of the mold body (1). The inner wall of the cooling channel (5) is provided with a hemispherical protrusion array (6) for disturbing the flow of coolant to enhance heat exchange. Food-grade antibacterial agent particles (9) are uniformly dispersed in the material of the Teflon functional layer (8).

2. The fish paste forming mold according to claim 1, characterized in that: The contact surface between the base of the mold body (1) and the transition layer (7) is provided with a sandblasted rough surface (10) to increase the bonding surface area.

3. A fish paste forming mold according to claim 1 or 2, characterized in that: The transition layer (7) is a nickel-based alloy layer, ceramic layer or metal oxide layer formed by thermal spraying process.

4. The fish paste forming mold according to claim 1, characterized in that: The path of the cooling channel (5) is arranged to conform to the contour of the molding cavity (2), and the distribution density of the discharge valve (4) increases accordingly in the area of ​​the material thickness in the projection plane of the molding cavity (2).

5. The fish paste forming mold according to claim 1, characterized in that: The food-grade antibacterial agent particles (9) are nano-sized particles, and their mass fraction in the Teflon functional layer (8) is 0.1% to 3%.

6. The fish paste forming mold according to claim 1, characterized in that: The thickness of the transition layer (7) is 30 micrometers to 150 micrometers, and the thickness of the Teflon functional layer (8) is 15 micrometers to 60 micrometers.

7. A fish paste forming mold according to claim 6, characterized in that: The ratio of the thickness of the Teflon functional layer (8) to the thickness of the transition layer (7) is 1:2 to 1:4.

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