Method for manufacturing a cutting board

Abstract

The present invention provides a cutting board and a method for manufacturing the cutting board. The method includes: placing a wooden cutting board in the mold cavity of an injection molding machine, injecting resin into the mold cavity, and adjusting the length of the rubber hose, the melting temperature, and the injection pressure of the injection molding machine so that the resin is in a liquid state when entering the mold cavity and the liquid resin fills the internal voids of the wooden cutting board. On the one hand, by filling the internal voids of the wooden cutting board with resin, the cutting board can be made less prone to water seepage, spoilage, mildew, etc., and the density of the wooden cutting board can be increased, making the cutting board more durable. On the other hand, by using an injection molding machine to fill the internal voids of the wooden cutting board with resin, the filling can be achieved quickly.

Description

Technical Field

[0001] The present invention relates to the field of kitchen utensils, and more particularly to a cutting board and a method for manufacturing the cutting board. Background Art

[0002] Cutting boards are indispensable kitchen utensils for people to cut and chop foods such as meat, vegetables, and fruits. Traditional cutting boards are mostly made of wood, which has the advantages of being natural, non-toxic, and corrosion-resistant, but also has certain disadvantages, such as being heavy, having many voids, being not durable, being easily cut with dents or cracks, and being easily permeated with water and deteriorating and mildewing. Summary of the Invention

[0003] Therefore, in order to solve the above problems existing in the prior art, the present invention aims to provide a durable cutting board and a method for manufacturing the cutting board.

[0004] According to one aspect of the present invention, there is provided a method for manufacturing a cutting board, the method comprising: placing a wooden cutting board in a mold cavity of an injection molding machine, injecting resin into the mold cavity, and adjusting the length of a rubber tube, the sol temperature, and the injection pressure of the injection molding machine so that the resin is in a liquid state when entering the mold cavity and the liquid resin fills the internal voids of the wooden cutting board. On the one hand, by filling the internal voids of the wooden cutting board with resin, the cutting board can be made less likely to be permeated with water and deteriorate and mildew, and the compactness of the wooden cutting board can be improved, making the cutting board more durable. On the other hand, by using an injection molding machine to fill the internal voids of the wooden cutting board with resin, the filling can be quickly achieved.

[0005] Preferably, before placing the wooden cutting board in the injection molding machine to fill the internal voids of the wooden cutting board with resin, one or more holes may be drilled in one or more sides of the wooden cutting board to form a fluid channel inside the wooden cutting board; during the filling of the internal voids of the wooden cutting board with resin by using the injection molding machine, a part of the one or more holes may be aligned with the injection hole of the injection molding machine, and the remaining holes of the one or more holes may be blocked so that the liquid resin enters the fluid channel through the part of the holes and then penetrates into the internal voids of the wooden cutting board. By drilling one or more holes in the side of the wooden cutting board and thus forming a fluid channel inside the wooden cutting board, in other words, hollowing out a part of the inside of the wooden cutting board, the resin can be more fully diffused to various positions inside the cutting board, and the filling completion time can be accelerated. At the same time, by replacing a part of the inside of the wooden cutting board with resin, the weight of the cutting board can be reduced and the durability of the cutting board can be improved.

[0006] Preferably, the injection hole of the injection molding machine can be aligned with the center of the front surface of the wooden cutting board. Thus, the resin filling of each part of the cutting board is uniform.

[0007] Preferably, the length of the rubber tube of the injection molding machine can be 2.5 m, the melting temperature of the plastic can be 150°C to 230°C, and the injection pressure can be 1.8 MPa to 3 MPa. Different from the production of plastic products by traditional injection molding machines, the present invention ensures that the resin masterbatch particles are completely melted into a liquid state (e.g., with a viscosity close to that of water) when reaching the injection port by adopting a much longer rubber tube length than that of ordinary injection molding machines and precisely controlling the rubber tube length, melting temperature of the plastic, and injection pressure of the injection molding machine, so that the resin can smoothly penetrate into the internal voids of the wooden cutting board. Under these parameters, the obtained cutting board exhibits excellent durability.

[0008] Preferably, the clamping force of the injection molding machine can be 15 kN to 30 kN, and the holding pressure time can be 15 s to 30 s.

[0009] Preferably, the main material of the wooden cutting board can be African teakwood, and the resin can be polyetheretherketone.

[0010] According to another aspect of the present invention, there is provided a cutting board made by the above method for manufacturing a cutting board.

[0011] According to still another aspect of the present invention, there is provided a cutting board, which may include a wooden cutting board body, and the internal voids of the wooden cutting board body may be filled with a resin material. The cutting board has improved compactness and adhesiveness, is more robust and durable, and at the same time, the surface of the cutting board is smooth, easy to clean, crack-resistant, and can prevent the penetration of residual liquid of moisture or grease into the voids, effectively preventing phenomena such as dampness and mildew.

[0012] Preferably, one or more holes may be formed in one or more sides of the wooden cutting board body, and the one or more holes may extend into the interior of the wooden cutting board body to form fluid channels, the fluid channels are filled with a resin material, and the exposed surface of the resin material filled in the fluid channels may be flush with the side surface of the wooden cutting board body.

[0013] Preferably, the fluid channels extending from one side surface of the wooden cutting board body into the interior of the wooden cutting board body may intersect and be in fluid communication with the fluid channels extending from another side surface of the wooden cutting board body into the interior of the wooden cutting board body. The material of the wooden cutting board body is African teakwood, and the resin material is polyetheretherketone. Thus, a part of the interior of the cutting board can be hollowed out and replaced with resin (e.g., high-strength resin), thereby reducing the weight of the cutting board and improving the overall strength of the cutting board. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1a and Figure 1bRespectively schematically show a front view and a side cross-sectional view of a wooden cutting board without resin injection. Among them, the side cross-sectional view shows diffusion holes drilled in the wooden cutting board;

[0015] Figure 2a and Figure 2b Respectively schematically show a front view and a side cross-sectional view of a wooden cutting board with resin injection. Among them, the front view shows the resin injection position of the wooden cutting board.

[0016] Figure 3 and Figure 4 Schematically show a perspective view of a wooden cutting board with drilled holes on the side and fluid channels inside.

[0017] Explanation of reference numerals:

[0018] 1 - Wooden cutting board; 2 - Gap; 3 - Hole; 4 - Resin injection position; 5 - Resin. Detailed implementation manners

[0019] In order to enable those skilled in the art to better understand the technical concept of the present invention, the following will describe in detail the specific embodiments of the present invention with reference to the drawings. In the drawings, the same reference numerals always represent the same components.

[0020] Refer to Figure 1a and Figure 1b , Figure 1a and Figure 1b Respectively schematically show a front view and a side cross-sectional view of the wooden cutting board 1. The interior of a traditional wooden cutting board has many voids (or pores, gaps), which makes the wooden cutting board prone to absorbing water or infiltrating grease or food residues into these voids and difficult to discharge, thus easily leading to the growth of bacteria and mildew on the cutting board and even rotting. In addition, the wooden cutting board is prone to cutting marks and cracking. Therefore, the present invention proposes to fill the internal voids of the wooden cutting board with resin or hard materials, such as resin materials with excellent strength or hardness, such as polyether ether ketone (PEEK), so as to improve its durability.

[0021] Resin materials are usually stored in the form of particles. The resin can be dissolved in a specific solvent to form a solution, and the wooden cutting board can be soaked in this solution to make the resin penetrate into the internal voids of the wooden cutting board. However, the solvent for dissolving the resin may be toxic or volatile, resulting in a poor production environment, and at the same time, the cutting board made thereby may be extremely harmful to human health. In addition, this method requires a long penetration time and the product performance is not easy to be unified.

[0022] The present invention proposes to use an injection molding machine to place a wooden cutting board in the mold cavity of the injection molding machine. Under specific hose lengths, melt temperatures, and injection pressures, resin is injected into the mold cavity and allowed to penetrate into the internal voids of the wooden cutting board. In this way, a cutting board product filled with resin can be quickly formed, and the injection parameters can be precisely controlled and mastered, enabling mass production and ensuring consistent product performance. In addition, no solvent needs to be added during this process, thus ensuring a good production environment and making the product safe and reliable. Additionally, due to the action of high pressure, the resin material filled in the internal voids of the wooden cutting board can be more tightly packed.

[0023] As shown in Figure 1, there are voids 2 (pores or gaps) inside the wooden cutting board 1. The wooden cutting board 1 is placed in the mold cavity of an injection molding machine, and resin is injected into the mold cavity to allow the resin to fully penetrate into the internal voids 2 of the wooden cutting board 1. Here, the internal volume and shape of the mold cavity of the injection molding machine can be the same as the volume and shape of the wooden cutting board 1, so that the wooden cutting board 1 is just located in the mold cavity. There can be a very small gap, or even no gap, between each wall of the mold cavity and each surface of the wooden cutting board 1, thereby forcing the resin injected from the injection port of the injection molding machine to penetrate into the internal voids of the wooden cutting board 1.

[0024] As shown in Figure 2, the injection position can be selected at the center of the front surface of the wooden cutting board 1, that is, the injection hole of the injection molding machine is aligned with the center of the front surface of the wooden cutting board 1, so that after the resin flows out of the injection hole, it spreads evenly in all directions, thereby making the resin distribution in the wooden cutting board 1 uniform.

[0025] Here, different from manufacturing plastic products using an injection molding machine in the prior art, since the internal voids of the wooden cutting board 1 are very small, for example, a few micrometers to a few millimeters, etc., the injection process is completely different. The present invention proposes to use a hose length much longer than that of a normal injection molding machine, and by precisely controlling the hose length, melt temperature, and injection pressure of the injection molding machine, ensuring that the resin masterbatch particles are completely melted into a liquid state (for example, with a viscosity close to that of water and the fluidity of water) when reaching the injection port, so as to enable the resin to smoothly penetrate into the internal voids of the wooden cutting board.

[0026] As can be seen from the experiments in Table 1 below, when other parameters of the injection molding process are kept the same, for example, when parameters such as the mold clamping force, holding pressure time, cooling time, and mold temperature are kept the same, the hose length is 2.5 m, the melt temperature is 150 °C to 230 °C, the injection pressure is 1.8 MPa to 3 MPa, the wooden main body of the cutting board is made of African teak, and the resin or hard material is made of polyetheretherketone (PEEK), and the durability of the manufactured cutting board is tested by a durable cutting board test method.

[0027] The durable cutting board test method includes the following steps:

[0028] a. Fix the cutting tool horizontally on the cutting tool fixture with the cutting edge facing downwards, fix the cutting board under the cutting tool, apply 16N pressure on the cutting tool (domestic 3Cr13, 170 slicing knife), and act vertically on the cutting board to be tested. (Add weight +5N according to actual situation)

[0029] b. The horizontal stroke of the measurement is 5cm, and the distance between each scratch is 1mm;

[0030] c. Repeat step b, stagger the starting point and cut with a horizontal stroke of 5 cm and a spacing of 1 mm between each scratch;

[0031] d. The measuring longitudinal stroke is 5cm and the distance between each scratch is 1mm.

[0032] e. Repeat step b, stagger the starting point and cut with a horizontal stroke of 5 cm and a spacing of 1 mm between each scratch;

[0033] After cutting in steps b, c, d, and e, observe the wear in the cutting area visually. The larger the score, the better the durability.

[0034] Table 1

[0035]

[0036] As shown in Table 1 above, Examples 1 to 4 are cutting boards made by filling the internal voids of a wooden cutting board with resin using an injection molding machine according to the concept of the present invention, and Comparative Examples 1 and 2 are wooden cutting boards without resin filling. From the results of the cutting experiment, it can be seen that the cutting performance of the cutting board obtained is different due to different sol temperatures and injection pressures. The higher the sol temperature and injection pressure, the higher the durability of the cutting board obtained. This is mainly attributed to the higher the sol temperature and injection pressure, the better the fluidity and flow power of the liquid resin, thereby being able to more fully and tightly fill the voids inside each part of the cutting board. When the sol temperature is 230°C, the injection pressure is 3MPa, and the hose length is 2.5m, the durability of the resulting cutting board is the best. In contrast, the ebony and rice husk cutting boards in Comparative Examples 1 and 2 have relatively poor durability.

[0037] Therefore, by injecting resin into the wooden cutting board, and by accurately controlling the sol temperature and the injection pressure, and using a long hose, a cutting board with excellent durability can be obtained. The sol temperature and the injection pressure mentioned above are only examples, and the present invention is not limited thereto, and can be appropriately adjusted according to the resin used.

[0038] By this method, each cutting board can be filled in only dozens of seconds, such as 30s to 60s, greatly shortening the product manufacturing time and improving production efficiency.

[0039] Manufacturing a resin filled with resin or hard material using an injection molding machine mainly includes four stages: filling, holding pressure, cooling, and demolding. These four stages are a complete continuous process. Filling stage: As described above, place the wooden cutting board in the mold cavity of the injection molding machine, and inject resin or hard material into the mold cavity for filling; Holding pressure stage: After filling the mold cavity, continuously apply pressure to ensure that the resin fully penetrates into the internal voids of the wooden cutting board and provides driving pressure for the resin flow; Cooling stage: After the resin is filled, it needs to be cooled for a certain time until the resin cools to a certain hardness, and then the mold is opened to take out the product; Demolding stage: After cooling is completed, the product can be ejected and dropped by the mechanical structure of the mold itself.

[0040] The parameters involved during this period, in addition to the sol temperature and injection pressure specifically described above, also involve the holding pressure time (for example, 15s to 30s. If the holding pressure time is too short, it is easy to shrink after taking out and the quality is unqualified; if the holding pressure time is too long, it wastes time and the output is low), the mold temperature (for example, 20°C to 40°C. If the mold temperature is too high, it is easy to discolor the wooden cutting board; if the mold temperature is too low, the shrinkage rate of the resin or hard material is large after injection molding and the quality is unqualified), the mold clamping force (for example, 15kN to 30kN. If the mold clamping force is too small, it is easy to overflow from the mold gap during injection; if the mold clamping force is too large, the mold is easy to crack and the service life is low), etc.

[0041] In addition, according to another embodiment of the present invention, the present invention proposes that before placing the wooden cutting board in the injection molding machine to fill the resin in the internal voids of the wooden cutting board, one or more holes can be drilled on one or more sides of the wooden cutting board to form fluid channels inside the wooden cutting board. During the filling of the internal voids of the wooden cutting board with resin using the injection molding machine, a part of the one or more holes is aligned with the injection hole of the injection molding machine, and the remaining holes of the one or more holes are blocked, so that the liquid resin enters the fluid channel through a part of the holes and then penetrates into the internal voids of the wooden cutting board.

[0042] Different from the above-mentioned method of selecting the injection position at the center of the front of the cutting board (where there are no mechanical drill holes on the cutting board), as shown in FIGS. 1, Figure 3 and Figure 4 shown, a hole 3 can be opened on the side of the cutting board, for example, by drilling, and the hole extends into the inside of the cutting board, thereby forming a fluid channel inside the cutting board. As Figure 4As shown, a plurality of holes can be drilled on both sides of the cutting board, and the respective channels formed thereby are interconnected, thereby forming a connected channel network inside the cutting board. In other words, the fluid channels extending from one side of the wooden cutting board body to the inside of the wooden cutting board body intersect and are fluidly connected to the fluid channels extending from the other side of the wooden cutting board body to the inside of the wooden cutting board body. When injecting resin, according to the number of injection ports, a part of the holes can be left open to align with the injection ports, and the remaining holes can be blocked. For example, if there is one injection port on the injection molding machine, then one hole is left open, and the orifices of all the remaining holes are blocked, so that the resin can enter the connected channel network inside the cutting board from one hole, thereby enabling the resin to contact the cutting board body over a larger area and accelerating the penetration process. After injecting the resin material into each fluid channel, during the cooling stage, the resin material can be cured and formed. In the formed cutting board, the exposed surfaces of the resin material filled in each fluid channel can be flush with the side surface of the wooden cutting board body. Thus, a cutting board with a smooth overall surface is formed. This drilling method hollowes out a part of the inside of the cutting board, and thus the hollowed-out part can be replaced with resin (for example, high-hardness PEEK material), thereby reducing the weight of the cutting board and improving the overall strength of the cutting board.

[0043] The specific embodiments of the present invention have been described in detail above. Although some embodiments have been shown and described, those skilled in the art should understand that, without departing from the principles and spirit of the present invention as defined by the claims, these embodiments can be combined, modified, and perfected (for example, different technical features of the present invention can be combined to obtain a new technical solution). These combinations, modifications, and perfections should also be within the protection scope of the present invention.

Claims

1. A method for manufacturing a cutting board, characterized in that, The method includes: Forming a plurality of holes on one or more sides of the wooden cutting board body to form fluid channels inside the wooden cutting board body, and each channel is communicated, so as to form a connected channel network inside the wooden cutting board body; Placing the wooden cutting board body in the mold cavity of an injection molding machine, injecting resin into the mold cavity, adjusting the length of the rubber tube, the melting temperature and the injection pressure of the injection molding machine, so that the resin is in a liquid state when entering the mold cavity, and the liquid resin enters the channel network, and then the liquid resin fills the internal voids of the wooden cutting board body to at least prevent mildew; and obtaining a cutting board with a resin material filled in the wooden cutting board body through curing.

2. The method for manufacturing a cutting board according to claim 1, characterized in that, The length of the rubber tube of the injection molding machine is 2.5 m, the melting temperature is 150°C to 230°C, and the injection pressure is 1.8 MPa to 3 MPa.

3. The method for manufacturing a cutting board according to claim 1, wherein, After filling the liquid resin in the mold cavity, continuously apply pressure to make the resin fully penetrate into the internal voids of the wooden cutting board.

4. The method for manufacturing a cutting board according to claim 1, characterized in that, The clamping force of the injection molding machine is 15 kN to 30 kN; the mold temperature is 20°C - 40°C; the holding pressure time is 15 s to 30 s.

5. The method for manufacturing a cutting board according to claim 1, characterized in that, The material of the wooden cutting board body is African teak, and / or the resin is polyetheretherketone.

6. The method for manufacturing a cutting board according to claim 1, characterized in that, The fluid channels extending from one side of the wooden cutting board body to the inside of the wooden cutting board body intersect and are fluidly connected with the fluid channels extending from another side of the wooden cutting board body to the inside of the wooden cutting board body, so as to obtain the channel network.

7. The method for manufacturing a cutting board according to claim 1, characterized in that, The exposed surface of the resin material filled in the fluid channel is flush with the side surface of the wooden cutting board body.

8. The method for manufacturing a cutting board according to claim 1, characterized in that, Align a part of the plurality of holes with the injection hole of the injection molding machine, and block the remaining holes of the plurality of holes to enable the liquid resin to enter the channel network.

9. The method for manufacturing a cutting board according to claim 2, wherein, The melting temperature is 150°C, 200°C, 215°C or 230°C; and / or the injection pressure is 1.8 MPa, 2.3 MPa, 2.6 MPa or 3 MPa.

10. The method for manufacturing a cutting board according to claim 1, wherein, The plurality of holes are formed by drilling; and / or the plurality of holes are evenly distributed; and / or the extending direction of the plurality of holes is the width direction and / or the length direction of the wooden cutting board body.

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