A molding process for a glove mold

Abstract

This invention belongs to the field of glove mold technology, specifically referring to a glove mold manufacturing process. The glove mold includes a palm part and an arm part. The palm part includes a front mirror image and a rear mirror image. The forming process of the front mirror image or the rear mirror image includes the following steps: First stretching: stretching a stainless steel plate to form the approximate shape of the product; Annealing: slowly heating the part to 500-1200℃, holding it in a nitrogen atmosphere for 2-8 minutes, and then cooling it to room temperature; Second stretching: further stretching the part; Finger seam shaping: shaping the part's surface and finger seams; Edge trimming: trimming the part along the radius (R-angle); Tempering: heating the part to 500-1200℃, holding it for 2-8 minutes, and then cooling it to room temperature; Flattening: flattening the R-angle of the part; Scraping: removing the remaining waste material other than the front mirror image or the rear mirror image to ensure its flatness. The tempering and annealing processes of this invention can effectively prevent cracking or excessive thinning of the finger seam area.

Description

Technical fields:

[0001] This invention belongs to the field of glove mold technology, and specifically refers to a glove mold forming process. Background technology:

[0002] Currently, existing glove molds include the palm and arm sections. The palm section comprises front-to-back and rear-to-back mirror images, manufactured using a stamping process. Based on feedback from similar products on the market, the limited space at the four finger seams prevents timely material replenishment during the drawing process, leading to cracking at these seams and a high scrap rate. Even if scrapping is avoided, these areas inevitably become excessively thinned, making them prone to burn-through or incomplete welding during laser welding after stamping. This necessitates manual argon arc welding for repairs and rework, significantly impacting production efficiency. This is one of the major factors currently hindering the mass production of this type of product. Summary of the Invention:

[0003] The purpose of this invention is to provide a glove mold forming process that can effectively prevent cracking or excessive thinning at the finger seams and improve the product yield.

[0004] This invention is implemented as follows:

[0005] A molding process for a glove mold, the glove mold comprising a palm portion and an arm portion, the palm portion comprising a front mirror image and a rear mirror image, each of the front and rear mirror images comprising fingers, a palm portion, and a wrist portion; the molding process for the front or rear mirror image comprising the following steps:

[0006] S1. First stretching: Stretch the stainless steel sheet to roughly shape the product surface. The stretching depth is 11-16mm.

[0007] S2, Second stretching: The workpiece stretched in S1 is further stretched, and the stretching depth is increased by 1.5-3.5mm;

[0008] S3, Finger seam shaping: Shaping the surface and finger seams of the workpiece obtained in S2 into place;

[0009] S4, Trimming: Trim the workpiece obtained in S3 along the R-angle;

[0010] S5. Tempering: Heat the workpiece obtained in S4 to 500-1200℃, hold for 2-8 minutes, and then cool to room temperature.

[0011] S6. Flatten the plane: Flatten the R-angle of the workpiece obtained in S5;

[0012] S7. Scraping the flat surface: Remove the remaining waste material in the process part obtained in S6, excluding the front or rear mirror image, to ensure its flatness.

[0013] Set step S8, annealing, between S1 and S2 or between S2 and S3: slowly heat the workpiece obtained in S1 or S2 to 500-1200℃, hold it in a nitrogen atmosphere for 2-8 minutes, and then cool it to room temperature.

[0014] The molding process of the aforementioned glove mold also includes a molding process for the arm portion, as detailed below:

[0015] S9. A round tube is subjected to cold stamping flaring and shrinking processes to obtain an arm section with a flared lower part.

[0016] In the above-mentioned glove mold forming process, step S10, splicing, is also included: the front mirror image, the rear mirror image, and the arm part are seamlessly spliced ​​together by laser welding using tooling.

[0017] In the above-mentioned glove mold forming process, step S11 is also included: the glove mold semi-finished product spliced ​​in S10 is made into a finished glove mold by grinding, polishing and shot blasting.

[0018] In the forming process of the above-mentioned glove mold, the thickness of the stainless steel plate is 0.7-1.2mm.

[0019] The outstanding advantages of this invention compared to the prior art are:

[0020] This invention incorporates an annealing process between the first and second stretching, or between the second stretching and the entire finger seam, to eliminate internal stress generated during stamping, reduce hardness, and restore plasticity. Subsequently, a tempering process is applied between the trimmed edges and the flat surface, which reduces the product's strength and internal stress, while enhancing its plasticity and toughness. This effectively prevents cracking or excessive thinning at the finger seam, improves the quality of the finger seam area, and ensures the overall quality of the stamped palm portion's front and rear mirror images, significantly increasing the product yield. Attached image description:

[0021] Figure 1 This is a schematic diagram of the workpiece after the first stretching step of this invention;

[0022] Figure 2 This is a schematic diagram of the workpiece after the second stretching process of the present invention;

[0023] Figure 3 This is a schematic diagram of the post-processing part of the complete finger seam of the present invention;

[0024] Figure 4 This is a schematic diagram of the workpiece after edge trimming according to the present invention;

[0025] Figure 5 This is a schematic diagram of the workpiece after the planarization process of the present invention;

[0026] Figure 6 This is a schematic diagram of the workpiece after the surface is scraped according to the present invention;

[0027] Figure 7 This is a schematic diagram of the molding process of the arm portion of the present invention;

[0028] Figure 8 This is an exploded schematic diagram of the glove mold of the present invention;

[0029] Figure 9 This is a three-dimensional view of the finished glove mold of the present invention.

[0030] In the diagram: 1. Front mirror image; 2. Rear mirror image; 3. Finger part; 4. Palm part; 5. Wrist part; 6. Stainless steel plate; 7. R-angle; 8. Arm part; 9. Round tube material; 10. Flared part. Detailed implementation method:

[0031] The present invention will be further described below with reference to specific embodiments:

[0032] Example 1: See Figure 1-9 :

[0033] This embodiment provides a molding process for a glove mold. The glove mold includes a palm portion and an arm portion 8. The palm portion includes a front mirror image 1 and a rear mirror image 2. Both the front mirror image 1 and the rear mirror image 2 include fingers 3, a palm portion 4, and a wrist portion 5. The front mirror image 1 or the rear mirror image 2 and the arm portion 8 are processed separately. The molding process of the front mirror image 1 or the rear mirror image 2 is as follows:

[0034] S1. First stretching: Stretch the stainless steel plate 6 to roughly shape the product surface. The stretching depth is 11-16mm (see...). Figure 1 The thickness of the stainless steel plate 6 is 0.7-1.2mm, and the specific thickness of the stainless steel plate 6 is adjusted according to product requirements.

[0035] S8. Annealing: Slowly heat the workpiece obtained in S1 to 500-1200℃, hold it at this temperature for 2-8 minutes in a nitrogen atmosphere, and then cool it to room temperature.

[0036] S2, Second Drawing: After S1 drawing, the workpiece is further drawn after S8 annealing, increasing the drawing depth by 1.5-3.5mm (see...). Figure 2 ).

[0037] S3, Finger Separation: Shape the surface and finger gaps of the workpiece obtained in S2 into position (see...). Figure 3 ).

[0038] S4, Trimming: Trim the workpiece obtained in S3 along the radius 7 (see...). Figure 4 ).

[0039] S5. Tempering: Heat the part obtained in S4 to 500-1200℃, hold for 2-8 minutes, and then cool to room temperature; tempering can reduce the strength and internal stress of the product and improve its plasticity and toughness.

[0040] S6. Flattening the plane: Flatten the R-angle 7 obtained in S5 on the workpiece (see...). Figure 5 );

[0041] S7. Flattening: Remove the remaining waste material from the workpiece obtained in S6, excluding the front mirror image 1 or the rear mirror image 2, to ensure its flatness (see...). Figure 6 );

[0042] S9, Forming process of arm part 8: The round tube material 9 is subjected to cold stamping flaring and shrinking processes to obtain an arm part 8 with a flared lower part 10 (e.g. Figure 7 (As shown). A snap-on plate for connection with glove manufacturing equipment can be provided inside the flared part 10.

[0043] S10. Splicing: The front mirror part 1, the rear mirror part 2, and the arm part 8 are seamlessly spliced ​​together by laser welding using tooling.

[0044] S11: The semi-finished glove mold assembled from S10 is ground, polished, and shot blasted to produce the finished glove mold (e.g., Figure 9 (As shown).

[0045] Due to significant work hardening and high residual stress during or after stamping, stainless steel products are highly susceptible to cracking. From a microscopic perspective, during deformation, numerous dislocations are generated on slip planes and grain boundaries, causing lattice distortion. Brittle carbides are broken and distributed along the flow direction. The greater the deformation, the higher the dislocation density, and the more severe the internal stress and lattice distortion. This causes the metal's deformation resistance and hardness to increase with deformation, while reducing its plasticity and resulting in significant work hardening. When work hardening reaches a certain level, continued deformation poses a risk of cracking or brittle fracture. The residual stress can easily cause spontaneous breakage of the stamped product. Furthermore, after being left in an ambient atmosphere for a period of time, the alloy may spontaneously develop grain boundary cracks.

[0046] Taking into account the properties of stainless steel and the actual conditions of the stamped products, this invention incorporates an annealing process between the first and second stretching stages. Annealing before the next process eliminates internal stress generated during stamping, reduces hardness, and restores plasticity.

[0047] Experiments show that setting annealing and tempering processes can effectively prevent product cracking, improve the quality of the finger seam area, ensure the overall quality of the front mirror image 1 and rear mirror image 2 of the stamped palm part, and greatly improve the product yield.

[0048] Example 2:

[0049] The process in this embodiment is basically the same as that in embodiment 1. The difference is that the annealing process in this embodiment is set between the second stretching and the finger seam filling. The workpiece obtained in S2 is slowly heated to 500-1200℃, kept at the temperature in a nitrogen atmosphere for 2-8 minutes, and then cooled to room temperature.

[0050] The above embodiments are merely one of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent changes made in accordance with the shape, structure and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A forming process for a glove mold, characterized in that: The glove mold includes a palm part and an arm part (8). The palm part includes a front mirror image (1) and a rear mirror image (2). Both the front mirror image (1) and the rear mirror image (2) include a finger part (3), a palm part (4), and a wrist part (5). The molding process of the front mirror image (1) or the rear mirror image (2) includes the following steps: S1. First stretching: Stretch the stainless steel plate (6) to roughly shape the product surface. The stretching depth is 11-16mm. S2, Second stretching: The workpiece stretched in S1 is further stretched, and the stretching depth is increased by 1.5-3.5mm; S3, Finger seam shaping: Shaping the surface and finger seams of the workpiece obtained in S2 into place; S4, Trimming: Trim the workpiece obtained in S3 along the R angle (7); S5. Tempering: Heat the workpiece obtained in S4 to 500-1200℃, hold for 2-8 minutes, and then cool to room temperature. S6, Flatten the plane: Flatten the R-angle (7) of the workpiece obtained in S5; S7. Scraping the flat surface: Cut off the remaining waste material other than the front mirror image (1) or rear mirror image (2) in the process part obtained in S6 to ensure its flatness; Set step S8, annealing, between S1 and S2 or between S2 and S3: slowly heat the workpiece obtained in S1 or S2 to 500-1200℃, hold it in a nitrogen atmosphere for 2-8 minutes, and then cool it to room temperature. The thickness of the stainless steel plate (6) is 0.7-1.2 mm.

2. The forming process of a glove mold according to claim 1, characterized in that: It also includes the molding process of the arm part (8), as detailed below: S9. The round tube (9) is subjected to cold stamping flaring and shrinking processes to obtain an arm part (8) with a flared part (10) at the bottom.

3. The forming process of a glove mold according to claim 2, characterized in that: It also includes step S10, splicing: the front mirror part (1), the rear mirror part (2), and the arm part (8) are seamlessly spliced ​​by laser welding using tooling.

4. The forming process of a glove mold according to claim 3, characterized in that: It also includes step S11: the semi-finished glove mold assembled in S10 is ground, polished and shot blasted to make the finished glove mold.

Images