Energy-saving hand mold appearance form implementation method

Abstract

The application relates to an energy-saving hand mold appearance form realization method, which comprises the following steps: step S100, preparing a palm part for processing; step S200, feeding the palm part into a heating wire body to heat to a predetermined temperature; step S300, feeding the heated palm part into a mold cavity of a hot forming mold, wherein the inner wall of the mold cavity is provided with a texture surface; and step S400, feeding high-pressure gas from a wrist opening of the palm part, and the palm part is inflated by the high-pressure gas in the hot forming mold to form a palm surface texture on the outer surface of the palm part. The palm part is inflated by the high-pressure gas, so that the palm surface texture is formed on the outer surface of the palm part, the palm surface texture prepared by the method is more full and smooth, the surface defects are few, the width-height ratio of the palm surface texture can reach 50%, the minimum width of the palm surface texture can reach 0.1 mm, the consistency of the palm surface texture is realized, and the processing quality of the concave-convex palm surface texture on the outer surface of the palm part is effectively improved.

Description

Technical Field

[0001] This application relates to the technical field of hand mold making, and in particular to a method for realizing the appearance of an energy-saving hand mold. Background Technology

[0002] Ultra-thin and ultra-strong materials are development requirements for the polymer film-forming products industry, including latex, silicone, PVC, and nitrile. Increasing output, reducing energy consumption, and lowering costs are crucial factors for enterprises to create a favorable environment for survival and development. Currently, the glove manufacturing industry extensively uses ceramic molds for production. The characteristics of ceramic hand molds—thick walls, poor thermal conductivity, and slow heating and cooling—are significant factors contributing to the industry's high energy consumption.

[0003] Stainless steel hand molds offer stable dimensional accuracy, good thermal conductivity, corrosion resistance, and can be produced in various thicknesses. These characteristics perfectly suit the requirements of manufacturing products made from latex, silicone, PVC, and nitrile, namely, large-scale production, low processing costs, high production efficiency, lightweight, high rigidity and high thermal conductivity, corrosion resistance, high temperature resistance and oxidation resistance, good shock resistance, long service life, low maintenance, easy operation, and large profit margins. Therefore, stainless steel hand molds are increasingly being used in glove production.

[0004] Currently, Chinese patent application number 2023115768728 discloses a semi-finished metal hand mold and a method for manufacturing the palm part of the metal hand mold. Specifically, it discloses that the palm part is made of stainless steel and has a left half and a right half. When the left half and the right half of the palm part are spliced ​​together, they are fixed by welding to form the palm part.

[0005] Among them, industrial stainless steel metal hand molds and medical metal hand molds need to have raised and recessed textures formed on both the palm and finger surfaces. This is achieved by sandblasting with large particles. However, the palm has a hollow structure. Due to the high sandblasting pressure and fast jet speed, the surface of the palm will collapse when large sand particles hit the product, affecting the processing quality of the raised and recessed textures on the palm surface. Therefore, there is room for improvement. Summary of the Invention

[0006] To improve the processing quality of the raised and recessed texture on the palm surface, this application provides an energy-saving method for realizing the appearance of a hand mold.

[0007] The method for achieving the appearance of an energy-saving hand mold provided in this application adopts the following technical solution:

[0008] A method for achieving the appearance of an energy-saving hand mold includes the following steps:

[0009] Step S100: Prepare the palm part for processing;

[0010] Step S200: Insert the palm into the heating wire and heat it to a predetermined temperature;

[0011] Step S300: The heated palm is sent into the mold cavity of the thermoforming mold, wherein the inner wall of the mold cavity is provided with a textured surface.

[0012] In step S400, high-pressure gas is introduced from the wrist opening of the palm, and the palm is inflated by the high-pressure gas in the thermoforming mold to form palm texture on the outer surface of the palm.

[0013] Preferably, the heating line adopts a tunnel heating furnace, and the palm is protected by nitrogen in the tunnel heating furnace;

[0014] Alternatively, the heating line may use a medium-high frequency heating furnace.

[0015] Preferably, in step S200, the palm part is heated to a predetermined temperature in the heating line, the predetermined temperature being 700-960°C, and the temperature of the palm part is kept constant at the predetermined temperature before the palm part is sent into the thermoforming mold.

[0016] Preferably, in step S300, before the heated palm is inserted into the mold cavity of the thermoforming mold, the thermoforming mold is preheated to 400-500°C.

[0017] Preferably, in step S400, the palm is inflated by high-pressure gas in the thermoforming mold, the pressure of the high-pressure gas on the palm is 30-70 MPa, and the inflation time of the high-pressure gas on the palm is 10-15 seconds.

[0018] Preferably, the thermoforming die includes an upper forming die and a lower forming die;

[0019] The upper forming mold includes an upper template, an upper mold pad, and an upper mold base arranged in sequence. The upper mold base has an upper mold cavity and an upper mounting port communicating with the upper mold cavity. The lower forming mold includes a lower template, a lower mold pad, and a lower mold base arranged in sequence. The lower mold base has a lower mold cavity and a lower mounting port communicating with the lower mold cavity.

[0020] The upper mold cavity and the lower mold cavity are joined together to form a mold cavity, which is adapted to fit the palm. The upper mounting port and the lower mounting port are joined together to form an expansion mounting cavity. A high-pressure gas inlet is provided on one side of the thermoforming mold for inserting into the expansion mounting cavity.

[0021] Preferably, the high-pressure gas filling part includes a mounting base and a hydraulic cylinder disposed on the mounting base. A plunger is mounted on the piston rod of the hydraulic cylinder. The plunger cooperates with the expansion mounting cavity. A high-pressure air hole is opened in the plunger. One end of the high-pressure air hole communicates with the outer wall surface of the plunger, and the other end of the high-pressure air hole communicates with the end face of the plunger.

[0022] Preferably, the piston rod end of the hydraulic cylinder is provided with an external thread section, and the plunger is provided with an internal thread hole that is threaded to the external thread section.

[0023] Preferably, the plunger is provided with a guide cone surface at one end near the expansion mounting cavity, and a gap is maintained between the outer wall surface of the guide cone surface and the inner wall surface of the expansion mounting cavity, the gap being 0.2mm-0.3mm larger than the material thickness of the palm.

[0024] Preferably, the distance L between the plunger and the mold cavity is 10-15mm, and the stroke by which the hydraulic cylinder drives the plunger to move is at least 1mm more than this distance L.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] This application uses high-pressure gas to inflate and shape the palm, thereby forming a palm texture on the outer surface of the palm. The palm prepared in this way has a fuller and smoother palm texture, fewer surface defects, a width-to-height ratio of up to 50%, and a minimum width of 0.1 mm, thus achieving consistency in the palm texture and effectively improving the processing quality of the uneven palm texture on the outer surface of the palm. Attached Figure Description

[0027] Figure 1 This is a flowchart illustrating the method for achieving the appearance of an energy-saving hand mold.

[0028] Figure 2 This is a schematic diagram of the structure of the palm.

[0029] Figure 3 This is a schematic diagram of the heating wire structure.

[0030] Figure 4 This is a schematic diagram of the installation of a thermoforming mold.

[0031] Figure 5 This is a schematic diagram showing the upper and lower forming molds in their separated state.

[0032] Figure 6 This is a schematic diagram of the closed state of the upper forming mold and the lower forming mold.

[0033] Figure 7This is a schematic diagram of the palm being inflated and swollen.

[0034] Explanation of reference numerals in the attached drawings: 1. Press; 2. Thermoforming mold; 21. Upper forming mold; 211. Upper template; 212. Upper mold pad; 213. Upper mold base; 214. Upper mold cavity; 215. Upper mounting port; 22. Lower forming mold; 221. Lower template; 222. Lower mold pad; 223. Lower mold base; 224. Lower mold cavity; 225. Lower mounting port; 23. High-pressure gas filling part; 231. Mounting seat; 232. Hydraulic cylinder; 233. Plunger; 234. Guide cone surface; 235. High-pressure air hole. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0036] A method for realizing the appearance of an energy-saving hand mold, referring to Figure 1 As shown, it includes the following steps:

[0037] Step S100: Prepare the palm part for processing.

[0038] According to the technical solution defined in step S100, specifically, the palm part is made of stainless steel metal material, and the thickness of the stainless steel metal sheet is 0.6mm-1.5mm. This embodiment takes a stainless steel metal sheet thickness of 1mm as an example for explanation. After the stainless steel metal sheet is cut into square pieces, the stainless steel metal sheet is stamped and stretched into a left half and a right half of the palm part. The left half and the right half of the palm part are spliced ​​together and fixed by welding the splice seam to form the palm part.

[0039] Reference Figure 2 As shown, the palm consists of fingers, palm and wrist opening from top to bottom. The inside of the palm is hollow, and the wrist opening is open, allowing it to connect with the inside of the palm.

[0040] Step S200: Insert the palm into the heating wire and heat it to a predetermined temperature.

[0041] According to the technical solution defined in step S200, specifically, in one embodiment, the heating line adopts a tunnel-type heating furnace, and the palm is protected by nitrogen gas in the tunnel-type heating furnace. In another embodiment, the heating line adopts a medium-high frequency heating furnace. In yet another embodiment, the heating line adopts a combustible gas heating furnace. The palm can be heated individually or continuously in batches within the heating line.

[0042] as follows Figure 3As shown, the front section of the heating line is the feeding area, which includes a preheating area, a heating area, and a heat preservation area. The rear section of the heating line is the forming area. The heating line is driven by a conveyor. The palm is fed into the heating line in the feeding area and then transported through the preheating area and the heating area by the conveyor. After being heated, the palm is gripped by a robotic arm and sent from the heating area into the forming area to form the textured surface of the palm.

[0043] In the heating coil, the preheating zone is used to preheat the palm, where the palm is slowly heated. In the heating zone, the palm is heated to a predetermined temperature, which is 700-960°C. This embodiment uses a predetermined temperature of 700°C as an example. The closer the predetermined temperature is to the lower limit, the more energy consumption can be saved.

[0044] After passing through the heating zone, the palm enters the heat preservation zone, where the temperature of the palm is kept constant at the predetermined temperature. Heating the palm to 700-960℃ and keeping it at that temperature for a period of time allows the metal structure of the palm to be austenitized as much as possible.

[0045] The time it takes for the palm part to be transferred from the feeding area to the forming area in the heating line is controlled within 60 seconds. By setting the transfer time of the heating line, it can be matched with the forming time of the palm part in the forming area, so that the heating efficiency can be used reasonably and energy can be saved.

[0046] In step S300, the heated palm is sent into the mold cavity of the thermoforming mold 2, wherein the inner wall of the mold cavity is provided with a textured surface.

[0047] In step S400, high-pressure gas is introduced from the wrist opening of the palm, and the palm is inflated by the high-pressure gas in the thermoforming mold 2 to form palm texture on the outer surface of the palm.

[0048] According to the technical solution defined in steps S300 to S400, specifically, the palm is gripped by a robotic arm and fed into the mold cavity of the thermoforming mold 2. The palm is inflated and formed by high-pressure gas in a hot state. Under the pressure of the high-pressure gas, the palm adheres to the mold cavity. At the same time, the stainless steel material of the palm creeps and fills the textured surface on the inner wall of the mold cavity, thereby forming a palm texture on the outer surface of the palm.

[0049] The palm is inflated by high-pressure gas in thermoforming mold 2. The pressure of the high-pressure gas on the palm is 30-70 MPa, and the inflation time is 10-15 seconds. By setting a certain inflation and holding time for the palm, it can be ensured that the metal structure of the palm is martensitized as much as possible.

[0050] Stainless steel has an elongation of only 30% to 40% at room temperature, but its elongation increases after heating. Therefore, in this embodiment, the palm is heated to a temperature range of 700-960°C.

[0051] It is worth noting that before the heated palm is inserted into the mold cavity of the thermoforming mold 2, the thermoforming mold 2 is preheated to 400-500°C. This embodiment will be described using the example of the thermoforming mold 2 being preheated to 400°C.

[0052] The preheating of the thermoforming mold 2 can be carried out intermittently or continuously using a flame gun, and in order to more accurately control the temperature of the thermoforming mold 2, a heating tube can be installed in the thermoforming mold 2.

[0053] The specific structure of thermoforming mold 2 is described below.

[0054] Reference Figure 4 As shown, the thermoforming mold 2 is set in the press 1. The thermoforming mold 2 includes an upper forming mold 21 and a lower forming mold 22. The upper forming mold 21 is installed on the upper table of the press 1, and the lower forming mold 22 is installed on the lower table of the press 1. The press 1 is used to drive the upper forming mold 21 to move downward, so as to realize the mold closing action of the upper forming mold 21 and the lower forming mold 22.

[0055] Reference Figure 5 and Figure 6 As shown, the upper forming mold 21 includes an upper template 211, an upper mold pad 212, and an upper mold base 213 arranged sequentially. The upper mold pad 212 is fixed to the lower surface of the upper template 211, and the upper mold base 213 is fixed to the lower surface of the upper mold pad 212. The upper mold base 213 is provided with an upper mold cavity 214, and an upper mounting port 215 is opened on the upper mold base 213. The upper mounting port 215 is opened on the side of the upper mold base 213 and extends into the upper mold base 213. The upper mounting port 215 is connected to the upper mold cavity 214.

[0056] The lower forming mold 22 includes a lower template 221, a lower mold pad 222, and a lower mold base 223 arranged sequentially. The lower mold pad 222 is fixed on the upper surface of the lower template 221, and the lower mold base 223 is fixed on the upper surface of the lower mold pad 222. The lower mold base 223 is provided with a lower mold cavity 224, and a lower mounting port 225 is opened on the lower mold base 223. The lower mounting port 225 is opened on the side of the lower mold base 223 and extends into the lower mold base 223. The lower mounting port 225 is connected to the lower mold cavity 224.

[0057] The upper mold cavity 214 and the upper mold cavity 214 are joined together to form a mold cavity, which is used to fit the palm.

[0058] The upper mounting port 215 and the lower mounting port 225 are joined together to form an expansion mounting cavity. The expansion mounting cavity is cylindrical and is connected to the wrist opening corresponding to the palm. A high-pressure gas inlet 23 for inserting into the expansion mounting cavity is provided on one side of the thermoforming mold 2.

[0059] The high-pressure gas filling unit 23 includes a mounting base 231 and a hydraulic cylinder 232 mounted on the mounting base 231. The cylinder body of the hydraulic cylinder 232 is fixed on the mounting base 231, and the piston rod of the hydraulic cylinder 232 passes through the mounting base 231. The mounting base 231 is fixed on the lower template 221. A plunger 233 is mounted on the piston rod of the hydraulic cylinder 232. Specifically, the end of the piston rod of the hydraulic cylinder 232 is provided with an external thread section, and the plunger 233 is provided with an internal thread hole that is threaded to the external thread section. The plunger 233 is threadedly connected to the piston rod of the hydraulic cylinder 232, thereby enabling the plunger 233 to be replaced on the piston rod.

[0060] It is worth noting that the axial direction line of the plunger 233 is located on the axial direction line of the piston rod of the hydraulic cylinder 232, and both the plunger 233 and the piston rod are set in the horizontal direction.

[0061] The plunger 233 mates with the expansion mounting cavity. A guide cone 234 is provided at one end of the plunger 233 near the expansion mounting cavity. A gap is maintained between the outer wall of the guide cone 234 and the inner wall of the expansion mounting cavity. This gap is 0.2mm-0.3mm larger than the material thickness of the palm. In this embodiment, the material thickness of the palm is 1mm. Since the outer wall of the guide cone 234 is inclined, the maximum value of this gap is 1.2mm. Therefore, the guide cone 234 can be inserted into the wrist opening of the palm. As the plunger 233 advances, the guide cone 234 continuously locks the wrist opening of the palm.

[0062] The distance L between the end of the plunger 233 and the opening of the mold cavity is 10-15mm. The stroke of the hydraulic cylinder 232 driving the plunger 233 to move is at least 1mm more than this distance L. In this embodiment, the distance L between the end of the plunger 233 and the opening of the mold cavity is 10mm, and the stroke of the hydraulic cylinder 232 driving the plunger 233 to move is 12mm.

[0063] A high-pressure air hole 235 is provided inside the plunger 233. One end of the high-pressure air hole 235 is connected to the outer wall surface of the plunger 233, and the other end of the high-pressure air hole 235 is connected to the end face of the plunger 233. The end face of the plunger 233 is the end face of the plunger 233 that is close to the expansion mounting cavity.

[0064] A quick-connector is threaded on the outer wall of the plunger 233. The quick-connector is connected to one end of the high-pressure air port 235. An air tube is connected to the quick-connector. High-pressure gas can be introduced into the high-pressure air port 235 through the air tube, and then pressed into the inner cavity of the palm through the high-pressure air port 235, inflating the palm with high-pressure gas.

[0065] Therefore, referring to Figure 6 and Figure 7 As shown, after the robotic arm grips the palm part from the heating line, it quickly places the palm part, heated to a preset temperature of 700-960℃, into the lower mold cavity 224 of the lower forming mold 22.

[0066] The press 1 drives the upper forming mold 21 and the lower forming mold 22 to perform a mold closing action, and the palm is pressed tightly in the mold cavity.

[0067] At this time, the plunger 233 moves under the drive of the hydraulic cylinder 232. The plunger 233 moves to one side of the mold cavity, and the guide cone surface 234 at the end of the plunger 233 is inserted into the wrist opening of the palm and locks the wrist opening of the palm from the inside and outside.

[0068] High-pressure gas is then introduced into the high-pressure gas port 235 through the gas pipe, and enters the palm through the high-pressure gas port 235 until the internal pressure of the palm reaches 50MPa. The internal pressure of the palm is maintained for 10 seconds, and the palm is inflated and shaped by the high-pressure gas. Under the pressure of the high-pressure gas, the palm fits onto the mold cavity. At the same time, the stainless steel material of the palm creeps and fills the textured surface on the inner wall of the mold cavity, thereby forming the palm texture on the outer surface of the palm.

[0069] After the palm texture is formed, the pressure inside the palm is released. After the pressure is released, the plunger 233 retracts, the upper forming mold 21 is raised, the palm is taken out of the mold cavity, and the next palm processing operation begins.

[0070] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for realizing the appearance of an energy-saving hand mold, characterized in that, Includes the following steps: Step S100: Prepare the palm part for processing. The palm part is made of stainless steel metal material. In step S200, the palm is sent into the heating wire and heated to a predetermined temperature. In step S200, the palm is heated to a predetermined temperature in the heating wire. The predetermined temperature is 700-960°C. Before the palm is sent into the thermoforming mold (2), the temperature of the palm is kept constant at the predetermined temperature. In step S300, the heated palm is sent into the mold cavity of the thermoforming mold (2), wherein the inner wall of the mold cavity is provided with a textured surface; in step S300, before the heated palm is sent into the mold cavity of the thermoforming mold (2), the thermoforming mold (2) is preheated to 400-500℃. In step S400, high-pressure gas is introduced from the wrist opening of the palm, and the palm is inflated by the high-pressure gas in the thermoforming mold (2) to form palm texture on the outer surface of the palm; in step S400, the palm is inflated by high-pressure gas in the thermoforming mold (2), the gas pressure of the high-pressure gas on the palm is 30-70MPa, and the time of the high-pressure gas inflating the palm is 10-15 seconds.

2. The method for realizing the appearance of an energy-saving hand mold according to claim 1, characterized in that: The heating line adopts a tunnel-type heating furnace, and the palm is protected by nitrogen in the tunnel-type heating furnace; Alternatively, the heating line may use a medium-high frequency heating furnace.

3. The method for realizing the appearance of an energy-saving hand mold according to claim 1, characterized in that: The thermoforming mold (2) includes an upper forming mold (21) and a lower forming mold (22); The upper forming mold (21) includes an upper template (211), an upper mold pad (212), and an upper mold base (213) arranged in sequence. The upper mold base (213) is provided with an upper mold cavity (214), and the upper mold base (213) is provided with an upper mounting port (215) communicating with the upper mold cavity (214). The lower forming mold (22) includes a lower template (221), a lower mold pad (222), and a lower mold base (223) arranged in sequence. The lower mold base (223) is provided with a lower mold cavity (224), and the lower mold base (223) is provided with a lower mounting port (225) communicating with the lower mold cavity (224). The upper mold cavity (214) and the lower mold cavity (225) are joined together to form a mold cavity, which is adapted to fit the palm. The upper mounting port (215) and the lower mounting port (225) are joined together to form an expansion mounting cavity. A high-pressure gas filling part (23) for inserting into the expansion mounting cavity is provided on one side of the thermoforming mold (2).

4. The method for realizing the appearance of an energy-saving hand mold according to claim 3, characterized in that: The high-pressure gas filling part (23) includes a mounting base (231) and a hydraulic cylinder (232) disposed on the mounting base (231). A plunger (233) is mounted on the piston rod of the hydraulic cylinder (232). The plunger (233) cooperates with the expansion mounting cavity. A high-pressure air hole (235) is opened in the plunger (233). One end of the high-pressure air hole (235) communicates with the outer wall surface of the plunger (233), and the other end of the high-pressure air hole (235) communicates with the end face of the plunger (233).

5. The method for realizing the appearance of an energy-saving hand mold according to claim 4, characterized in that: The piston rod end of the hydraulic cylinder (232) is provided with an external thread section, and the plunger (233) is provided with an internal thread hole that is threaded to the external thread section.

6. The method for realizing the appearance of an energy-saving hand mold according to claim 4, characterized in that: The plunger (233) is provided with a guide cone surface (234) at one end near the expansion mounting cavity. The outer wall surface of the guide cone surface (234) and the inner wall surface of the expansion mounting cavity maintain a gap, which is 0.2mm-0.3mm larger than the material thickness of the palm.

7. The method for realizing the appearance of an energy-saving hand mold according to claim 4, characterized in that: The distance L between the plunger (233) and the mold cavity is 10-15mm, and the stroke of the hydraulic cylinder (232) driving the plunger (233) to move is at least 1mm more than this distance L.

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