Silicone rubber glove manufacturing method

Abstract

To provide a manufacturing method of a silicone rubber glove, which allows the surface of a semifinished glove product to be coated with a silicone rubber slurry only by a single spraying, and allows both of areas between fingers and an area between the thumb and the forefinger to be uniformly coated with the silicone rubber slurry, allows the consumption of a material to be saved, and allows the cost to be reduced.SOLUTION: There is provided a manufacturing method of a silicone rubber glove composed of a liner, a semifinished glove product, and a silicon rubber layer toward the outside from the inside, which includes horizontally moving the semifinished glove product on a production line while rotating the same around the axis of itself when spraying a liquid silicone rubber once on the surface of the semifinished glove product. An outflow passage of the liquid silicone rubber for spraying the liquid silicone rubber includes at least spray ports for areas between fingers and a spray port for an area between the thumb and the forefinger which are fixed and opened. Each open length of the spray ports of the areas between fingers is equal to or greater than each individual length of the fingers of the semifinished glove product. An open length of the spray port of the area between the thumb and the forefinger is equal to or greater than a length of the area between the thumb and the forefinger of the semifinished glove product.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to the field of glove processing technology, and more specifically to a method for producing silicone rubber gloves. [Background technology]

[0002] Silicone rubber has excellent resistance to high and low temperatures, steam and water vapor, is eco-friendly and environmentally friendly, and maintains stable performance even in high temperatures of over 200℃ and low temperatures of under -50℃, while also being flexible, and is widely used in products that come into contact with food, sealing materials for kitchen utensils, nipples for infants, etc. These excellent properties of silicone rubber also lead to its continued application in the field of gloves.

[0003] At present, silicone rubber glove products on the market are mainly divided into two types based on the process. The first is the injection molding method, that is, the silicone rubber is injected into the mold cavity by the injection molding machine, and the mold is demolded after vulcanization. The process is relatively simple, but the hand feeling is poor and it is inconvenient to use. The second is the silicone rubber layer is uniformly applied on the surface of the fabric by spraying, dipping, etc., and the mold is demolded after vulcanization. The hand feeling of the product is good and it is convenient to use, and it can be combined with a functional liner, so that the gloves have the functions of cold protection, heat insulation, knife cut and puncture prevention. Therefore, the second process is adopted on the market at present.

[0004] In the second process, currently, there is a tendency to apply silicone rubber to the surface of the fabric by using a two-step silicone rubber spraying method, for example, in the manufacturing method of silicone rubber gloves with patent number CN201611079092.2, the palm side of the glove mold is turned upwards, the finger ends of the glove mold are tilted upwards, and silicone rubber slurry is sprayed on the finger ends of the glove mold to perform the first slurry spraying, to ensure that the gaps between the fingers are evenly covered with silicone rubber slurry, and then the glove mold is adjusted to a horizontal position, the glove mold is rotated around the axis, and the silicone rubber slurry is continuously sprayed on the surface of the glove mold to perform the second slurry spraying, so that the silicone rubber slurry is applied to the entire glove mold to form a glove semi-finished product. This manufacturing method is complicated, and the production of each silicone rubber glove requires two-step slurry spraying, which consumes a lot of material, has high manufacturing costs, and is long in process time. Summary of the Invention

[0005] The technical problem that the present invention aims to solve is to provide a method for manufacturing silicone rubber gloves that can cover the surface of a semi-finished glove with silicone rubber slurry in one spraying and ensure that the silicone rubber slurry is evenly covered on both the gaps between the fingers and the opening of the glove, thereby saving material consumption and reducing costs.

[0006] In the manufacturing method of the silicone rubber glove of the present invention, which is divided from the inside to the outside into the liner, the semi-finished glove, and the silicone rubber layer, the liquid silicone rubber is sprayed on the surface of the semi-finished glove once, and when the liquid silicone rubber is sprayed, the semi-finished glove is moved horizontally on the production line while rotating about its own axis, and the outflow passage when the liquid silicone rubber is sprayed includes at least an inter-finger spray nozzle and a chin-mouth spray nozzle which are fixedly opened, and the opening length of the inter-finger spray nozzle is equal to or longer than the length of the finger area of ​​the semi-finished glove, and the opening length of the chin-mouth spray nozzle is equal to or longer than the length of the chin-mouth area of ​​the semi-finished glove.

[0007] As a further improvement of the present invention, the method further includes a silicone rubber spraying step including fingertip silicone rubber spraying and surface silicone rubber spraying, and when performing the fingertip silicone rubber spraying, the glove semi-finished product is kept horizontal after the silicone rubber spraying is completed, and the axial rotation is maintained, and the glove semi-finished product is sprayed using compressed air so that the spraying direction is from the fingertip to the finger base, When spraying the surface of the silicone rubber, the glove semi-finished product is placed vertically facing downward, and the axial rotation is maintained, and the glove semi-finished product is sprayed with compressed air so that the spray direction is perpendicular to the longitudinal direction of the glove semi-finished product.

[0008] As a further improvement of the present invention, the present invention further includes a cooling step in which the glove blank is vertically immersed in a cooling liquid during cooling, the cooling liquid is covered on the surface of the glove blank for cooling treatment, the cooling liquid can permeate and expand into the inside of the glove blank through the leakage holes on the surface of the glove blank, and the cooling liquid permeated into the glove blank appears on the surface of the glove blank as a pattern.

[0009] As a further improvement of the present invention, the present invention further includes a silicone rubber drying step of drying the glove semi-finished product in a dryer after the spraying is completed, and before the glove semi-finished product is placed in the dryer, the jig controls the glove semi-finished product to be horizontally arranged in the longitudinal direction and controls the glove mold to rotate at least once around the axial direction.

[0010] As a further improvement of the present invention, both the inlet and outlet of the dryer are provided with insulation panels that have the ability to retain heat and insulate, preventing the high temperature inside the dryer from being transmitted to other step areas and affecting the operation of those areas.

[0011] As a further refinement of the invention, all of the above steps are carried out in a thermostatic chamber where the temperature is maintained between 15°C and 20°C.

[0012] As a further improvement of the present invention, in the surface silicone rubber spraying step, a movable gear is horizontally provided on the outer periphery of the support rod of the jig for clamping the semi-finished glove, and the movable gear is fixedly connected to the support rod so as to be coaxial with the support rod, so that the rotation of the movable gear drives the rotation of the support rod in the same direction, and stationary gears are uniformly provided on the belt conveyor production line track, and the movable gear and the stationary gear mesh with each other to transmit power during operation, thereby providing the ability to maintain axial rotation during transportation of the semi-finished glove.

[0013] As a further improvement of the present invention, it further comprises a pre-treatment step of flame-spraying the surface of the glove blank using a flame injector so as to remove burrs on the surface of the glove blank before spraying the glove blank.

[0014] As a further improvement of the present invention, the method further includes a liner covering step of covering a glove mold, dripping hot melt adhesive onto the inner fingertips of the semi-finished glove, covering the outer circumference of the liner to bond the fingertips of the liner to the inner wall of the fingertips of the semi-finished glove, transporting the semi-finished glove to a 120°C oven to melt the hot melt adhesive, and then separating the semi-finished glove from the oven to make it parallel to a horizontal plane, maintaining the axial rotation of the semi-finished glove, and spraying the semi-finished glove with compressed air so that the spray direction is from the fingertips to the base of the fingers. Effect of the Invention

[0015] Compared with the prior art, the beneficial effects of the present invention are that the surface of the semi-finished glove can be covered with silicone rubber slurry with a single spray, and the silicone rubber slurry can be evenly covered on both the gaps between the fingers and the opening of the glove, thereby saving material consumption and reducing costs.

[0016] After the slurry is sprayed, the glove mold is moved away from the slurry spraying area while being maintained in a horizontal position, and the silicone rubber slurry on the surface of the semi-finished glove is sprayed from the fingertip to the base using compressed air while blowing off the liquid beads adhering to the fingertip. This prevents the fingertip from being left uncovered with silicone rubber slurry due to the adhesion of liquid beads to the fingertip, while ensuring the finishing precision of the finger surface.

[0017] After the liquid beads on the fingertips of the glove mold are blown away, the jig controls the glove mold vertically downward while maintaining axial rotation to spray the silicone rubber in the dripping area, ensuring that no liquid beads adhere to the glove surface and improving the finishing accuracy of the glove surface.

[0018] Before the glove mold is put into the dryer for drying, the fixture controls the glove semi-finished product to be horizontally set in the longitudinal direction and controls the glove mold to rotate at least once around the axial direction, so that the silicone rubber slurry distribution on the surface of the glove semi-finished product is uniform, and after the glove mold is directly put into the dryer, the silicone rubber slurry liquid beads on the surface of the glove semi-finished product are directly dried by the dryer, which prevents the occurrence of uneven shape defects on the glove surface.

[0019] While the glove semi-finished products are cooled by the coolant, the coolant determines whether the glove semi-finished products will prevent leakage. If the glove semi-finished products do not prevent leakage, the coolant will leave a clear mark near the leakage hole, allowing staff to screen defective glove semi-finished products in a timely manner, so as to guarantee the non-defective glove rate and improve the quality of finished glove products.

[0020] After dripping the fingertip adhesive onto the inside of the glove blank, the glove blank is placed over the outside of the liner, so that the glove blank and the inside are fixed together, which is a simple step and improves production efficiency.

[0021] Insulation panels are provided at both the inlet and outlet of the dryer, which maintain a high temperature inside the dryer while blocking the high temperature inside the dryer from dissipating to the outside, preventing the high temperature from affecting the process flow in other areas after being transferred to those areas.

[0022] The silicone rubber gloves manufactured by the present invention have obtained the US FDA certification, the US ASTM F1358-16 fireproof certification, the EN388:2016 anti-cut grade 4 certification, the EN407:2022 contact heat grade 4 certification, the EN511:2006 cold contact resistance -50℃ certification, the EN374 grade 6 certification and other certifications, and have passed the FFGB ​​test, with high glove performance, anti-slip and abrasion resistance, and high practicality. [Brief description of the drawings]

[0023] [Figure 1] 1 is a schematic diagram showing the structure of a silicone rubber glove of the present invention. [Diagram 2] FIG. 1 is a front view of a production line for manufacturing silicone rubber gloves of the present invention. [Diagram 3] FIG. 1 is a plan view of a production line for manufacturing silicone rubber gloves of the present invention. [Figure 4] FIG. 2 is a plan view of the pretreatment area of ​​a glove blank of the present invention. [Diagram 5] FIG. 2 is a front view of the drying area of ​​the anti-penetration liquid of the present invention. [Figure 6] FIG. 2 is a plan view of the silicone rubber spray area of ​​the present invention. [Figure 7] FIG. 2 is a plan view of the spray area after spraying of the silicone rubber of the present invention. [Figure 8] FIG. 2 is a schematic diagram showing a specific structure of the slurry spray tank of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] For specific Example 1, please refer to the manufacturing method of silicone rubber gloves shown in FIGS. 1 to 8, which includes the following steps.

[0025] (1) Glove semi-finished product pretreatment: A glove mold is fixed to a jig on a production line, and a glove semi-finished product 1 is placed on the glove mold. The jig controls the glove mold so that it is parallel to a horizontal plane. Before the process of spraying a protective liquid onto the glove semi-finished product, burrs on the surface of the glove semi-finished product 1 are burned off and removed with a flame injector, making the surface of the glove semi-finished product 1 flat, which makes it easier to achieve a uniform coating during operations such as spraying a protective liquid onto the glove semi-finished product 1 in subsequent steps.

[0026] (2) Application of protective liquid: The jig controls the glove mold vertically downward, and the glove mold moves forward together with the production line to enter the anti-penetration liquid application area. The glove mold is maintained vertically downward in the anti-penetration liquid application area while maintaining axial rotation, and the machine controls the brushes so that the anti-penetration liquid is evenly applied to the surface of the glove semi-finished product 1, where the anti-penetration liquid is an environmentally friendly waterproof and oil repellent agent with a mass percentage of 3 wt%. The machine sequentially applies the liquid to the surface of the glove semi-finished product, and the glove semi-finished product 1 on which the anti-penetration liquid has been applied is moved forward together with the production line to separate it from the anti-penetration liquid application area.

[0027] (3) Drying treatment: The glove mold is introduced into the drying area of ​​the production line, and the semi-finished glove 1 is dried at a temperature of 150°C for 1 minute, and then removed from the drying area together with the production line.

[0028] (4) Slurry spraying: After controlling the glove semi-finished product 1 so that the jig is set parallel to the horizontal plane, the glove semi-finished product 1 is rotated around its own axis and entered into the slurry spraying area together with the production line. Immediately after the glove mold enters the slurry spraying area, the silicone rubber slurry in the slurry spray tank is sprayed downward like a waterfall, and at this time, the silicone rubber slurry covers the outer surface of the glove semi-finished product 1 at least in the areas between the little finger and the ring finger, between the index finger and the middle finger, and between the middle finger and the ring finger.

[0029] When the glove mold is transported in the slurry spraying area, the glove mold is maintained to rotate around its own axis, and the silicone rubber slurry is sprayed onto the surface of the glove semi-finished product 1 through the through holes in the surface of the slurry spraying tank. As the glove mold rotates, the silicone rubber slurry is covered on the surface of the permeation preventing layer of the entire surface of the glove semi-finished product 1 to form the glove semi-finished product.

[0030] When the glove mold is transported near the exit, the silicone rubber slurry in the slurry spray tank is sprayed downward again in a waterfall-like manner. At this time, the silicone rubber slurry is sprayed without any blind spots onto the surface of the semi-finished glove 1 near the finger gaps 13 so that all of the outer surfaces near each finger gap of the semi-finished glove 1 are covered with the silicone rubber slurry.

[0031] (5) Fingertip silicone rubber spraying: The glove mold is kept horizontal and separated from the slurry spraying area, and the glove mold is moved into the fingertip silicone rubber spraying area. In the fingertip silicone rubber spraying area, compressed air is used to spray the surface of the glove semi-finished product 1 for 2 minutes. The direction of the compressed air during spraying is from the fingertip to the finger base of the glove semi-finished product 1. The glove mold is maintained in the axial direction during spraying. The purpose is to blow off the liquid beads attached to the fingertip during slurry spraying, and to prevent the fingertip from not being covered with silicone rubber slurry due to the adhesion of liquid beads on the fingertip of the glove semi-finished product 1. At the same time, in the fingertip silicone rubber spraying area, the silicone rubber slurry of the glove semi-finished product 1 is sprayed from the fingertip to the finger base, which prevents the bumps caused by the presence of liquid beads after cooling and molding, and ensures the finishing accuracy and uniformity of the finger surface of the glove semi-finished product 1.

[0032] (6) Surface silicone rubber spraying: The glove mold is separated from the fingertip silicone rubber spraying area, and the tool is controlled to enter the surface silicone rubber spraying area vertically downward. The glove mold is kept rotating in the axial direction, and in the surface silicone rubber spraying area, compressed air is used to spray the surface of the glove semi-finished product 1 for 2 minutes, and the direction of the compressed air during spraying is perpendicular to the longitudinal direction of the glove semi-finished product 1. The purpose is to blow off the liquid beads attached to the surface of the glove semi-finished product 1 to improve the finishing accuracy of the glove surface.

[0033] (7) Drying the silicone rubber: The glove mold is separated from the surface silicone rubber spraying area. Before the glove mold is placed in the dryer, the jig controls the semi-finished glove so that it is horizontally placed in the longitudinal direction, and controls the glove mold so that it rotates at least once around the axial direction. The glove mold is placed in a 90°C dryer together with the product production line to be dried for 15 minutes, then in a 110°C dryer to be dried for 15 minutes, and finally in a 128°C dryer to be dried for 20 minutes. During drying, the glove mold is always rotated around its longitudinal extension line as an axis.

[0034] (8) Cooling: After the semi-finished glove 1 is dried, the glove mold is separated from the dryer. At this time, a heat insulating panel having heat insulating ability is provided between the dryer and the cooling area to prevent the high temperature in the dryer from being transferred to the cooling area and adversely affecting the cooling effect of the cooling area.

[0035] The jig controls the glove mold vertically, and then immerses the glove mold covered with the semi-finished glove 1 in the cooling liquid directly below, so that the entire glove semi-finished glove 1 is completely immersed in the cooling liquid for cooling treatment, and the cooling time is 2 minutes or more. When the semi-finished glove 1 is completely immersed in the cooling liquid, the cooling liquid is covered on the surface of the semi-finished glove 1. If there is a leakage hole on the surface of the semi-finished glove 1, the cooling liquid will penetrate and expand into the interior of the semi-finished glove 1 through the leakage hole, and the cooling liquid that has penetrated into the interior of the semi-finished glove 1 will appear on the surface of the semi-finished glove 1 as a pattern.

[0036] After the cooling is completed, the jig controls the semi-finished glove 1 to be vertically separated from the cooling liquid, and the surface of the semi-finished glove 1 without leakage holes is shiny and has no noticeable pattern, whereas the surface of the semi-finished glove 1 with leakage holes shows a pattern generated after the cooling liquid penetrates.

[0037] The staff checks the condition of the glove semi-finished products 1 in sequence. If the staff observes that the surface of the glove semi-finished products 1 is smooth and has no noticeable marks, they record the glove semi-finished products 1 as "passed". If the staff observes a noticeable pattern on the surface of the glove semi-finished products 1, it indicates that the glove semi-finished products 1 has a leakage hole, and they record the glove semi-finished products 1 as "failed". In order to guarantee the quality rate of the finished gloves, the staff screens out the failed gloves and sends the passed gloves to the next process.

[0038] (9) Putting on the liner: Remove the semi-finished glove 1 and put the liner on the glove mold. After dripping hot melt adhesive on each fingertip in the semi-finished glove 1, put the semi-finished glove 1 on the glove mold so that it covers the outer circumference of the liner. At this time, the fingertips of the liner and the inner wall of the fingertips of the semi-finished glove 1 are bonded to each other.

[0039] (10) Drying: The glove mold with both the liner and the glove semi-finished product 1 attached thereto is transported to a 120°C dryer and dried for 10 minutes. The hot melt adhesive at the connection between the liner and the glove 1 is melted into a liquid at the high temperature of 120°C.

[0040] (11) Spraying: The glove mold is separated from the dryer, and the jig controls the glove mold parallel to the horizontal plane, and at this time controls the compressed air to spray the semi-finished glove 1, and the direction of the compressed air during spraying is set to blow from the fingertip to the finger base of the semi-finished glove 1, and the rotation of the glove mold is maintained during spraying, with the purpose of blowing away the molten adhesive on the inner wall of the fingertip of the semi-finished glove 1 to increase the adhesive area between the semi-finished glove 1 and the liner, and making the connection between the semi-finished glove 1 and the liner more stable.

[0041] (12) Cooling: The jig moves away from the spraying area, and after controlling the glove mold vertically, the glove mold with the glove semi-finished product 1 placed over it is immersed in the cooling liquid directly below, so that the entire glove semi-finished product 1 is completely immersed in the cooling liquid for the cooling process, whereby the hot melt adhesive in the glove semi-finished product 1 is cooled and solidified, and the adhesion between the glove semi-finished product 1 and the liner is ensured.

[0042] (13) Edge trimming: After trimming the liner portion exceeding the glove semi-finished product 1, the glove semi-finished product 1 and the flap of the liner are connected and fixed.

[0043] The slurry spray tank is disposed in the slurry spray area, and a plurality of through holes are formed on the surface of the slurry spray tank, which are uniformly and densely distributed in the slurry spray tank. When the silicone rubber slurry is added to the slurry spray tank, the silicone rubber slurry is uniformly infiltrated from the through holes to the lower side of the slurry spray tank. The slurry spray tank is disposed directly above the production line on which the glove mold moves, so that when the glove mold enters the slurry spray area together with the production line, the silicone rubber slurry is sprayed from the through holes of the slurry spray tank onto the surface of the glove semi-finished product 1 below the slurry spray tank, thereby achieving the purpose of covering the entire outer surface of the glove semi-finished product 1 with the silicone rubber slurry.

[0044] On one side of the slurry spray tank, an inter-finger spray nozzle 21, which is a long opening, is formed. The inter-finger spray nozzle 21 is provided on one side of the slurry spray tank so as to correspond to the position of the inter-finger gap 12 between the little finger and the ring finger when the semi-finished glove 1 enters the slurry spray area. The length of the inter-finger spray nozzle 21 is equal to or longer than the length of the finger area of ​​the semi-finished glove 1. As a result, when the palm 11 of the semi-finished glove 1 enters the slurry spray area facing upward, the silicone rubber slurry is sprayed from the inter-finger spray nozzle 21 onto the surface of the semi-finished glove 1 around the inter-finger gap 12 by a waterfall-like slurry spray. As the semi-finished glove 1 rotates, the silicone rubber slurry is completely attached to the surface near the inter-finger gap 12. The entire surface of the semi-finished glove 1 near the inter-finger gap 12 is uniformly covered with the silicone rubber slurry. No blind spots are present when the slurry is sprayed.

[0045] In addition, since the height of inter-finger spaces 12 between the index finger and middle finger and between the middle finger and ring finger in the semi-finished glove 1 is close to the height of inter-finger spaces 12 between the little finger and ring finger, the silicone rubber slurry sprayed from inter-finger spray nozzle 21 can be sprayed without blind spots onto the outer surface of the semi-finished glove 1 near inter-finger spaces 12 between the index finger and middle finger and between the middle finger and ring finger.

[0046] On the other side of the slurry spray tank, a long opening, a tiger mouth spray nozzle 22, is formed. The tiger mouth spray nozzle 22 is provided on one side of the slurry spray tank spaced from the inter-finger spray nozzle 21 so as to correspond to the position of the tiger mouth finger gap 13 when the semi-finished glove 1 is moved away from the slurry spray area, and the length of the tiger mouth spray nozzle 22 is equal to or longer than the length of the tiger mouth area of ​​the semi-finished glove 1. When the semi-finished glove 1 enters the slurry spray area, the position of the finger gap 13 is lower than the positions of the other finger gaps 12, and when the inter-finger spray nozzle 21 is activated, spraying cannot be performed without blind spots on the surface of the semi-finished glove 1 near the finger gap 13; therefore, a spray nozzle 22 must be provided. When the semi-finished glove 1 passes through the spray nozzle 22, the silicone rubber slurry is sprayed from the spray nozzle 22 onto the surface of the semi-finished glove 1 near the finger gap 13 by a waterfall of slurry spray, and as the semi-finished glove 1 rotates, the silicone rubber slurry is completely adhered to the finger gap 13, and the surface of the semi-finished glove 1 near the finger gap 13 is also uniformly covered with the silicone rubber slurry.

[0047] Therefore, the specific steps of slurry spraying are as follows:

[0048] S51: The tool controls the semi-finished glove 1 so that it is placed parallel to a horizontal plane, and controls the semi-finished glove 1 so that it rotates around its own axis and enters the lower part of the slurry spray tank. The semi-finished glove 1 is simultaneously sprayed with the silicone rubber slurry sprayed from the through-hole and the inter-finger spray nozzle 21 of the slurry spray tank. The silicone rubber slurry that passes through the through-hole is sprayed onto the palm and back of the semi-finished glove 1, and the silicone rubber slurry that passes through the inter-finger spray nozzle 21 is sprayed onto the surface of the semi-finished glove 1 near the gaps 12 between the little finger and the ring finger by a waterfall of slurry spray. As the semi-finished glove 1 continues to rotate in the axial direction, the waterfall of silicone rubber slurry is sprayed sequentially without blind spots onto the gaps 12 between the little finger and the ring finger, the gaps 12 between the middle finger and the ring finger, and the gaps 12 between the index finger and the middle finger so that all of the outer surfaces of the semi-finished glove 1 near the gaps 12 are covered with silicone rubber slurry. However, since the position of the finger gap 13 is lower than the positions of the other finger gaps 12, there is a part of the outer surface of the semi-finished glove 1 near the finger gap 13 that has not yet been sprayed.

[0049] S52: The semi-finished glove 1 is moved away from the spray area of ​​the finger gap spray nozzle 21, and the semi-finished glove 1 is moved at a constant speed below the slurry spray tank, and the semi-finished glove 1 is maintained rotating in the axial direction, and the silicone rubber slurry in the slurry spray tank is sprayed onto the semi-finished glove 1 through the through holes in the surface of the slurry spray tank, and the entire surface of the semi-finished glove 1 is uniformly covered with the permeation prevention layer. At this time, there is a part of the outer surface of the semi-finished glove 1 near the finger gap 13 that has not been sprayed yet.

[0050] S53: When the semi-finished glove 1 is transported below the nozzle 22, the semi-finished glove 1 is simultaneously sprayed with silicone rubber slurry sprayed from the through hole of the slurry spray tank and the nozzle 22. The silica gel slurry that passes through the through hole is sprayed onto the palm and back of the semi-finished glove 1, and the silicone rubber slurry that passes through the nozzle 22 is sprayed onto the surface of the semi-finished glove 1 near the gap between the fingers 13 by a waterfall of slurry spray. As the semi-finished glove 1 rotates, the waterfall of silicone rubber slurry is sprayed onto the surface near the gap between the fingers 13 without any blind spots, and the surface of the semi-finished glove 1 near the gap between the fingers 13 is also uniformly covered with silicone rubber slurry.

[0051] A movable gear is horizontally provided on the support rod of the jig which clamps the glove mold. The movable gear is fixedly connected to the support rod so as to be coaxial with the support rod. Rotation of the movable gear drives rotation of the support rod in the same direction. Stationary gears are uniformly provided on the production line belt conveyor. The movable gear and the stationary gear mesh with each other during operation to transmit power. The movable gear drives rotation of the glove mold and the stationary gear in the same axial direction while controlling transportation of the glove mold on the production line conveyor.

[0052] For example, in the silicone rubber dripping step, the movable gear of the support rod of the jig that clamps the glove mold and the stationary gear of the conveyor mesh and transmit power to control the glove mold to be transported in the silicone rubber dripping area, while at the same time maintaining the axial rotation of the glove mold so that the semi-finished glove 1 is blown by compressed air in every direction, thereby ensuring that the surface of the semi-finished glove 1 is smooth and the thickness of the glove is more uniform.

[0053] In addition, in the silicone rubber drying step, before the glove mold is put into the dryer, the glove mold needs to be rotated at least once around the axial direction so that the silicone rubber slurry on the surface of the semi-finished glove 1 is uniformly distributed. After the glove mold is directly put into the dryer, the liquid beads of the silicone rubber slurry on the surface of the semi-finished glove 1 are directly dried by the dryer, thereby avoiding the occurrence of uneven shape defects on the glove surface.

[0054] The steps of spraying the slurry, spraying the silicone rubber, and dripping the silicone rubber are all performed in a thermostatic chamber maintained at a temperature of 15° C. to 20° C., thereby preventing increased consumption of materials due to the silicone rubber slurry drying too quickly or too slowly under high or low temperature climatic conditions, which would result in wastage of the silicone rubber slurry. The silicone rubber slurry is maintained in an undried state in a constant temperature environment, allowing the silicone rubber slurry to be easily and uniformly sprayed in the steps of spraying the silicone rubber and dripping the silicone rubber, thereby ensuring a high yield rate of the product.

[0055] In addition, both the inlet and the outlet of the dryer are provided with heat-retaining and heat-insulating insulation panels. The heat-insulating panels seal the dryer to maintain a high temperature inside the dryer so that the semi-finished glove 1 in the dryer can be continuously dried. The heat-insulating panels block the transfer of heat from the dryer to the outside and prevent the high temperature inside the dryer from being transferred to the cooling area and affecting the cooling effect of the semi-finished glove 1, thereby improving the cooling efficiency.

[0056] The above examples were subjected to product performance tests, and the results are as follows:

[0057] (1) US FDA Testing [Table 1]

[0058] As shown in the table, by detecting the total extractables content of the gloves in the four simulations of distilled water, subsequent extraction of distilled water, n-hexane and subsequent extraction of n-hexane, the total extractables content is less than the maximum allowable limit of temperature in the simulations, so the silicone rubber gloves manufactured by the manufacturing method of silicone rubber gloves of the present invention are safe and harmless to the human body.

[0059] (2) EN388 Anti-cut Level 4 Test [Table 2]

[0060] The standard adopted is the EN388:2016+A1:2018 standard. During testing, a sample was taken from the palm of the silicone rubber glove produced by the present invention, and a tear strength resistance of more than 75N was detected, which reached the fourth grade standard of the EN388 anti-cut test and had high tear strength.

[0061] (3) US Fire Test The silicone rubber gloves manufactured by the silicone rubber gloves manufacturing method of the present invention have passed the US ASTM F1358-16 fireproof certification, which indicates that the fireproof performance of the silicone rubber gloves meets the industry standard. Here, the US ASTM F1358-16 fireproof certification process is as shown in the table below.

[0062] [Table 3]

[0063] Please note that the contents of the above table only cover some of the processes in the US ASTM F1358-16 fire protection certification, not all of them.

[0064] (4) EN407 insulation test [Table 4]

[0065] The adopted standard is the EU protective glove standard EN407:2020, and the data in the table are some of the contact heat test values ​​obtained according to the heat contact test method of EN ISO 12127:2015. Based on the test data, the silicone rubber gloves manufactured by the manufacturing method of the silicone rubber gloves of the present invention have reached the EN407:2020 contact heat class 4 standard and have high thermal insulation.

[0066] (5) The silicone rubber gloves produced by the method for producing silicone rubber gloves of the present invention have passed the EN511 cold contact test, and the performance of the gloves is not affected at -50°C and is not permeable to cold air, meeting the EN511:2006 standard.

[0067] (6) LFGB (VOM) Volatile Matter Test [Table 5]

[0068] The silicone rubber gloves manufactured by the method for manufacturing silicone rubber gloves of the present invention have passed the LFGB (VOM) volatile matter test, and during the polyester inner container test, the detection result was less than 1% volatile matter, proving that the gloves are a product that does not contain harmful substances, have low volatility, and are safe and harmless to the human body.

[0069] (7) In tests for protection against harmful chemicals and microorganisms, the silicone rubber gloves manufactured by the manufacturing method of the present invention meet the EN374 Class 6 standard, showing high protection against harmful chemicals and microorganisms. [Explanation of symbols]

[0070] 1. Glove semi-finished products 11. Palm 12, between the fingers 13, between the fingers of the tiger mouth 21, finger spray nozzle 22, tiger mouth spray mouth

Claims

1. A method for manufacturing a silicone rubber glove, which is divided into a liner, a semi-finished glove (1), and a silicone rubber layer from the inside to the outside, comprising the steps of: The number of times that the liquid silicone rubber is sprayed onto the surface of the semi-finished glove (1) is one time, and when the liquid silicone rubber is sprayed, the semi-finished glove (1) is rotated about an axis extending along the horizontal width direction while being moved in a horizontal longitudinal direction perpendicular to the horizontal width direction on a production line, A slurry spray tank used for spraying liquid silicone rubber is provided above a semi-finished glove (1), and includes a plurality of through holes formed in the entire bottom of the slurry spray tank, an inter-finger spray nozzle (21) formed at one end of the bottom of the slurry spray tank as either the upstream side or the downstream side of the production line so as to extend along the horizontal width direction, and a tiger's mouth spray nozzle (22) formed at the other end of the bottom of the slurry spray tank as either the upstream side or the downstream side of the production line so as to extend along the horizontal width direction, One end of the tiger nozzle spray nozzle (22) is located on one side of the horizontal width direction of the slurry spray tank relative to one end of the interdigital spray nozzle (21). A method for producing silicone rubber gloves comprising the steps of:

2. A method for manufacturing a silicone rubber glove, which is divided into a liner, a semi-finished glove (1), and a silicone rubber layer from the inside to the outside, comprising the steps of: The number of times that the liquid silicone rubber is sprayed onto the surface of the semi-finished glove (1) is one. When the liquid silicone rubber is sprayed, the semi-finished glove (1) is moved horizontally on the production line while rotating around its own axis. Further comprising a silicone rubber spraying step including fingertip silicone rubber spraying and surface silicone rubber spraying; When spraying silicone rubber onto the fingertips, after the spraying of silicone rubber is completed, the glove semi-finished product (1) is kept horizontal and rotated in the axial direction, and compressed air is used to spray the glove semi-finished product (1) from the fingertips toward the base of the fingers. When spraying the surface of the silicone rubber, the glove semi-finished product (1) is placed vertically downward and rotated in the axial direction, and compressed air is used to spray the glove semi-finished product (1) in a direction perpendicular to the longitudinal direction of the glove semi-finished product (1). A method for producing silicone rubber gloves comprising the steps of:

3. The method further includes a silicone rubber drying step of drying the glove blank (1) in a dryer after the spraying is completed, and controlling the glove mold to rotate at least once around the axial direction before the glove blank (1) is put into the dryer.

2. The method for producing a silicone rubber glove according to claim 1.

4. Both the inlet and the outlet of the dryer are provided with heat-insulating and insulating panels, which can prevent the high temperature in the dryer from being transmitted to other step areas and affecting the operation of those areas.

4. The method for producing a silicone rubber glove according to claim 3.

5. All steps are carried out in a thermostatic chamber maintained at a temperature of 15°C to 20°C.

2. The method for producing a silicone rubber glove according to claim 1.

6. In the surface silicone rubber spraying step, a movable gear is horizontally provided on the outer periphery of a support rod of a jig for clamping the semi-finished glove (1), and the movable gear is fixedly connected to the support rod so as to be coaxial with the support rod, so that the rotation of the movable gear drives the rotation of the support rod in the same direction, and a stationary gear is uniformly provided on the belt conveyor production line track, and the movable gear and the stationary gear mesh with each other to transmit power during operation, so that the semi-finished glove (1) has the ability to maintain axial rotation during transportation.

3. The method for producing a silicone rubber glove according to claim 2.

7. The method further includes a pretreatment step of flame-spraying the surface of the glove blank (1) using a flame blower so as to remove burrs on the surface of the glove blank (1) before spraying the glove blank (1).

2. The method for producing a silicone rubber glove according to claim 1.

8. A method for manufacturing a silicone rubber glove, which is divided into a liner, a semi-finished glove (1), and a silicone rubber layer from the inside to the outside, comprising the steps of: The number of times that the liquid silicone rubber is sprayed onto the surface of the semi-finished glove (1) is one. When the liquid silicone rubber is sprayed, the semi-finished glove (1) is moved horizontally on the production line while rotating around its own axis. The method further includes a liner covering step of covering the glove mold with a liner, dropping hot melt adhesive onto the inner fingertips of the semi-finished glove (1), and then covering the outer periphery of the liner with the semi-finished glove (1) to bond the fingertips of the liner to the inner wall of the fingertips of the semi-finished glove (1), transporting the semi-finished glove (1) to a 120°C dryer to melt the hot melt adhesive, and then separating the semi-finished glove (1) from the dryer to make it parallel to a horizontal plane, maintaining the axial rotation of the semi-finished glove (1), and spraying the semi-finished glove (1) with compressed air so that the spray direction is from the fingertips to the finger base. A method for producing silicone rubber gloves comprising the steps of:

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