Bra cup forming mold and forming method

Abstract

The present invention provides a molding die and molding method for a bra cup, comprising a concave mold, a convex mold, a planar workbench, and an elastic layer. The concave mold is located above the convex mold, the planar workbench is located between the convex and concave molds, the elastic layer is disposed on the planar workbench, and the fabric is disposed on the elastic layer. The planar workbench includes a first through hole, and the elastic layer includes a second through hole, wherein the first and second through holes are capable of partially passing the convex mold. The present invention arranges the elastic layer on the planar workbench, the fabric is disposed on the elastic layer, and the concave mold compresses the elastic layer. During hot pressing, the fabric undergoes a slight deformation on the elastic layer, thereby reducing fabric usage, avoiding material waste, and improving material utilization.

Description

Technical Field

[0001] The present invention relates to the technical field of clothing equipment, and in particular to a forming mold and a forming method for a bra cup. Background Art

[0002] The surface of the bra cup is usually covered with fabric that matches the convex surface of the bra cup. The bra cover fabric that matches the bra cup curve is produced using a fabric hot pressing and shaping process, which is a common production process in the underwear industry.

[0003] The shaped surface fabric produced using this process technology has the advantages of good consistency with the bra cup curve, high production efficiency, and simple operation. However, it has significant defects such as large fabric consumption, high material waste, and low material utilization rate, which is contrary to the low-carbon policy advocated by the world and the country.

[0004] The bra and underwear industry urgently needs to solve the common problems of large fabric consumption, high material waste and low material utilization in the production of fabrics using hot pressing and shaping. Summary of the Invention

[0005] In view of this, the present invention aims to provide a bra cup forming mold and forming method to solve the problems of large amount of fabric used, high material waste and low material utilization when forming the bra cup in the mold in the prior art.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A forming mold for a bra cup includes a male mold, a female mold, a planar workbench, and an elastic layer. The female mold is located at the upper end of the male mold, the planar workbench is located between the male mold and the female mold, the elastic layer is arranged on the planar workbench, and the fabric is arranged on the elastic layer. The planar workbench includes a first through hole, and the elastic layer includes a second through hole. The first through hole and the second through hole can allow the male mold to partially pass through.

[0008] The arrangement is such that an elastic layer is arranged on a flat workbench, the fabric is arranged on the elastic layer, and the die presses the elastic layer. During hot pressing, the fabric is slightly deformed on the elastic layer, which can reduce the amount of fabric used, avoid material waste, and improve material utilization.

[0009] Furthermore, the punch includes a second base and a raised portion, and the first through hole and the second through hole are capable of allowing the raised portion to pass through.

[0010] This arrangement allows the male die to pass through the elastic layer and close the female die, thus achieving hot pressing molding of the fabric.

[0011] Furthermore, the raised portion includes a cylindrical body and a spherical body, one end of the cylindrical body is connected to the spherical body, and the other end of the cylindrical body is connected to the second base, and the second base and the raised portion are an integrally formed structure.

[0012] This arrangement allows the male die to pass through the elastic layer and close the female die, thus achieving hot pressing molding of the fabric.

[0013] Furthermore, the width of the two ends of the outer side of the cylindrical body is W2, and the width of the two ends of the first through hole is W3, wherein W3-W2=0.2-10 mm.

[0014] This arrangement allows the fabric to deform slightly on the elastic member, which can reduce material usage and improve material utilization.

[0015] Furthermore, the die includes a first base and a recessed portion, the first base and the recessed portion are integrally formed, and the first base is located at the upper end of the recessed portion.

[0016] In this setup, the die can hold the fabric in place.

[0017] Furthermore, the concave portion includes a concave spherical surface, the width of both ends of the concave spherical surface is W1, the width of both ends of the first through hole is W3, and W3-W1=-5 to 10 mm.

[0018] This arrangement enables the recessed portion to fix the fabric.

[0019] Furthermore, the thickness of the elastic layer is H2, and the value range of H2 is 0.5 to 10 mm.

[0020] This setting ensures that the cloth deforms slightly on the elastic layer.

[0021] Furthermore, the thickness of the planar workbench is H1, and the value range of H1 is 10 to 50 mm.

[0022] Furthermore, the planar workbench is a flat plate made of metal material.

[0023] This setting supports the elastic layer.

[0024] A method for forming a bra cup, using the above-mentioned forming mold, is characterized in that it specifically comprises the following steps:

[0025] S1. Install the die on the upper die table of the machine, install the punch on the lower die table of the machine, and fix the flat workbench in the middle of the die and punch.

[0026] S2. Place the fabric on the upper surface of the elastic layer and make sure it is flat;

[0027] S3. Start the machine switch, and the upper die table of the machine drives the die to move downward until the fabric is compacted;

[0028] S4, the lower die table of the machine drives the punch to move upward until the punch and the die are closed;

[0029] S5. Setting the bra cup hot pressing process parameters, and hot pressing the fabric to obtain a semi-finished fabric product;

[0030] S6. Separate the male mold from the female mold, and process the semi-finished fabric to obtain a bra cup.

[0031] The method is simple and easy to operate, can significantly reduce the amount of cloth used, prevent material waste, and improve material utilization.

[0032] Compared with the prior art, the present invention provides a bra cup forming mold and a forming method.

[0033] It has the following advantages:

[0034] (1) The present invention arranges an elastic layer on a flat workbench, and the fabric is arranged on the elastic layer. During hot pressing, the fabric is slightly deformed on the elastic layer, which can significantly reduce the amount of fabric used, prevent material waste, and improve material utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a front view of the concave mold of the present invention;

[0036] Figure 2 A top view of the concave mold of the present invention;

[0037] Figure 3 It is a front view of the male mold of the present invention;

[0038] Figure 4 A top view of the male mold of the present invention;

[0039] Figure 5 It is a front view of the planar workbench of the present invention;

[0040] Figure 6 A top view of the planar workbench of the present invention;

[0041] Figure 7 is a front view of the elastic layer of the present invention;

[0042] Figure 8 is a top view of the elastic layer of the present invention;

[0043] Figure 9 It is a front view of the fabric of the present invention;

[0044] Figure 10 A top view of the fabric of the present invention;

[0045] Figure 11 It is a structural schematic diagram of the concave mold, the convex mold, and the planar workbench of the present invention;

[0046] Figure 12 This is a schematic structural diagram of the elastic layer of the present invention placed on a flat workbench;

[0047] Figure 13 This is a schematic diagram of the structure of the fabric of the present invention placed on the elastic layer;

[0048] Figure 14 This is a schematic diagram of the downward movement of the die of the present invention;

[0049] Figure 15 This is a schematic diagram of the punch of the present invention moving upward and contacting the cloth;

[0050] Figure 16 This is a schematic diagram of the present invention where the punch moves upward to deform the cloth upward;

[0051] Figure 17 This is a schematic diagram of the hot pressing forming of the male and female dies of the present invention;

[0052] Figure 18 This is a schematic diagram of the upward movement of the female mold of the present invention;

[0053] Figure 19 This is a front view of the semi-finished fabric product of the present invention;

[0054] Figure 20 A top view of the semi-finished fabric of the present invention;

[0055] Figure 21 It is a schematic diagram of the downward movement of the punch of the present invention;

[0056] Figure 22 This is a front view of the finished fabric of the present invention;

[0057] Figure 23 It is a top view of the finished fabric of the present invention.

[0058] Description of reference numerals:

[0059] 1-concave mold, 11-first base, 12-concave raised portion, 121-concave spherical surface, 2-convex mold, 21-second base, 22-raised portion, 221-cylindrical body, 222-spherical body, 2221-convex spherical surface, 3-planar workbench, 31-first through hole, 4-elastic layer, 41-second through hole, 5-cloth, 51-first deformed cloth, 52-second deformed cloth, 6-semi-finished cloth, 7-bra cloth cup. DETAILED DESCRIPTION

[0060] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. In addition, a brief explanation is provided regarding the directions or positions involved in the following specific embodiments: The directions or positions indicated by "up," "down," "left," "right," and the like mentioned in the embodiments refer to the directions or positions shown in the accompanying drawings.

[0061] The present invention relates to a forming die for a bra cup, such as Figure 1-23 As shown, it includes a die 1, a punch 2, a planar worktable 3, and an elastic layer 4. The die 1 is located at the upper end of the punch 2, the planar worktable 3 is located between the punch 2 and the die 1, the elastic layer 4 is arranged on the planar worktable 3, and the fabric 5 is arranged on the elastic layer 4. The planar worktable 3 includes a first through hole 31, and the elastic layer 4 includes a second through hole 41. The first through hole 31 and the second through hole 41 can allow the punch 2 to partially pass through. The fabric is fixed by moving the die 1 downward, and the hot pressing forming of the fabric is achieved by moving the punch 2 upward.

[0062] Specifically, the bottom end of the female mold 1 is parallel to the bottom end of the male mold 2 .

[0063] Specifically, after the die 1 and the punch 2 are assembled, they must meet the structural process and technical requirements of traditional fabric molds and must not have significant mold defects such as interference, biting, gaps, and uneven transitions.

[0064] Specifically, the die 1 includes a first base 11 and a concave portion 12 . The first base 11 and the concave portion 12 are integrally formed, and the first base 11 is located at the upper end of the concave portion 12 . The concave portion 12 includes a concave spherical surface 121 , and the concave spherical surface 121 opens downward.

[0065] Specifically, the concave spherical surface 121 has a shape of an outer curved surface of a cup, and the maximum width W1 at both ends of the concave spherical surface 121 is.

[0066] Specifically, the punch 2 includes a second base 21 , and an upwardly protruding protrusion 22 is provided on the second base 21 . The first through hole 31 and the second through hole 41 can allow the protrusion to pass through.

[0067] Specifically, the protrusion 22 includes a cylindrical body 221 and a spherical body 222 . One end of the cylindrical body 221 is connected to the spherical body 222 , and the other end of the cylindrical body 221 is connected to the second base 21 .

[0068] Specifically, the connection between the second base 21 and the raised portion 22 is a first contour line, and the shape of the first contour line is consistent with the contour shape of the cup.

[0069] Specifically, a convex spherical surface 2221 is provided on the upper end of the spherical body 222 , and the convex spherical surface 2221 cooperates with the concave spherical surface 121 to achieve the shaping of the bra cup.

[0070] Specifically, the planar workbench 3 is a metal flat plate with a certain thickness and strength. The planar workbench 3 is fixed by a support frame. The shape of the first through hole 31 is consistent with the shape of the first contour line.

[0071] Specifically, the spherical body 222 and the cylindrical body 221 can pass through the first through hole 31 and close with the die 1 .

[0072] Specifically, when the die and the punch are closed, the width of the outer ends of the cylindrical body 221 is W2, and the width of the outer ends of the first through hole is W3. There is a total gap between the cylindrical body 221 and the first through hole 31. The total gap between the cylindrical body 221 and the first through hole 31 should not be too large. The total gap between the two is Wa. The calculation formula for the gap relationship between the two is:

[0073] Wa=(W3-W2), Wa=(0.2-10)mm;

[0074] At the same time, the width of the concave spherical surface 121 at both ends is W1, and the total gap between the width of the first through hole 31 at both ends and the ends of the concave sphere is Wb. The calculation formula of the gap relationship between the two is:

[0075] Wb=(W3-W1), Wb=(-5–10)mm;

[0076] And Wb<Wa.

[0077] Specifically, the thickness of the planar workbench 3 is H1. H1 may vary according to the strength and rigidity of the material. Usually, H1 is 10 to 50 mm. The actual data needs to be determined according to the actual application of the mold.

[0078] Specifically, the planar workbench is a flat plate made of metal material and needs to have certain strength and rigidity. During the hot pressing and shaping process, when bearing the pressure of the equipment and the mold, no significant bending deformation can occur.

[0079] Specifically, the elastic layer 4 is a high-temperature resistant material layer with a certain thickness, elasticity and strength, and can be composed of one or more materials; it is required to work in a working environment with a temperature of 180-250 degrees Celsius and a pressure of 1 MPa, and the physical properties of the material cannot change.

[0080] Specifically, the elastic layer 4 has a thickness H2, and H2 is in the range of (0.5-10) mm.

[0081] Specifically, the elastic layer 4 is provided with a second through hole 41. Preferably, the second through hole 41 has the same shape as the first through hole 31. The size difference between the second through hole 41 and the first through hole 31 is Wc.

[0082] The calculation formula is: Wc = W4-W3;

[0083] Wc=(0-10)mm

[0084] The elastic layer 4 is fixed on the upper surface of the planar workbench 3 , and the center point and plane coordinates of the second through hole are required to be consistent with those of the first through hole.

[0085] During the hot pressing and shaping process of the cloth 5, the position of the planar workbench 3 is fixed and does not move, and the elastic layer 4 is relatively stationary along with the planar workbench 3. However, due to the pressure of the die 1, the thickness H4 of the elastic layer 4 changes. The change value is based on meeting the quality requirements of the produced shaping surface cloth, and the smaller the change value, the better.

[0086] Specifically, the die and punch move relative to each other based on the flat workbench to close and separate, and the hot pressing and shaping production of the fabric is completed according to the set process technical parameters.

[0087] A method for forming a bra cup, using the above-mentioned forming mold, specifically comprises the following steps:

[0088] (1) Mold installation

[0089] The die 1 is mounted on the upper die table of the machine, the punch 2 is mounted on the lower die table of the machine, and the plane workbench 3 is mounted in the middle area between the die 1 and the punch 2. The plane workbench is fixed by a fixing device, for example, it can be connected and fixed by a support ring. The position of the plane workbench 3 is fixed and remains unchanged during the hot pressing process without displacement. Figure 11 shown.

[0090] The elastic layer 4 is laid flat on the plane workbench 3 and fixed, and the center point and plane coordinates of the first through hole and the second through hole are required to be consistent.

[0091] Adjust the position of the plane workbench and the relative positions of the plane workbench, the die and the punch. When the upper die table of the machine moves down to the end position, the die presses the elastic layer 4 to produce an appropriate amount of deformation.

[0092] When the cloth 5 is squeezed upward by the punch 2 and displaced 0-L (L is in the range of 5-30mm, and the specific value needs to be determined comprehensively according to the cloth and the mold), only the cloth in the first through-hole area is squeezed and deformed by the punch, and the clamped material outside the first through-hole area cannot be displaced and its position remains unchanged.

[0093] When the cloth 5 is squeezed upward by the punch 2 and its displacement is greater than L (L is in the range of 5-30mm, and the specific value needs to be determined comprehensively according to the cloth and the mold, etc.), the cloth 5 moves upward with the punch 2, and the material clamped by the die 1 and the plane workbench 3 is gradually pulled inward by the punch 2 and enters the first through-hole area for heating, extrusion and shaping.

[0094] When the cloth 5 is squeezed upward by the punch 2 to the end position set by the mold closing, after the cloth 5 moves upward with the punch 2 and stabilizes at the end position, the minimum width of the material clamped by the die 1 and the plane workbench 3 is B (B is in the range of 2-5mm, and the specific value needs to be determined comprehensively according to the cloth and the mold, etc.), so that all edges of the cloth 5 are clamped by the die 1 and the elastic layer 4, and the clamped cloth meets the technical and process requirements of not being too wide.

[0095] The punch 2 moves up with the lower die table and closes with the die 1 through the first through hole of the planar workbench 3 and the elastic layer 4. The position distance between the working surfaces of the die 1 and the punch 2 after closing is the same as the requirements of the traditional mold installation technology.

[0096] (2) Place the fabric;

[0097] Place the cloth 5 on the upper surface of the elastic layer 4 according to the process requirements and make it flat.

[0098] (3) Press the fabric tightly

[0099] Press the start switch of the machine, the upper die table of the machine drives the die 1 to move downward to the set end position and then stops. The bottom surface of the die presses the fabric 5 against the elastic layer 4 and the flat workbench 3, clamping the fabric 5 firmly.

[0100] (4) Convex surface moves upward

[0101] The lower die table of the machine automatically moves up, driving the punch 2 to move upward.

[0102] (5)Mold closing

[0103] The punch 2 moves upward continuously along with the upper die table of the machine and approaches the die 1;

[0104] When the punch 2 is clamped upward, the fabric is squeezed and stretched upward to obtain the first deformed fabric. Part of the fabric clamped by the flat workbench 3 and the elastic layer 4 is automatically pulled into the first through-hole area under the force.

[0105] The upper die table has completed its upward displacement and the die is closed.

[0106] (6) Hot pressing

[0107] Similar to conventional hot pressing and shaping production, the second deformed fabric 52 after the mold in the mold cavity is closed is hot pressed and shaped according to set parameters such as temperature, pressure, and time.

[0108] (7) Move the die upward

[0109] After the hot pressing and shaping is completed, the upper die table of the machine automatically starts to move upward, and the die 1 moves upward with the machine and leaves the flat workbench 3.

[0110] (8) Take out the product

[0111] Take out the semi-finished fabric product 6 that has been heat-pressed and shaped.

[0112] (9) Convex surface moves downward

[0113] Start the lower die table switch of the machine, and the lower die table automatically moves down with the machine, driving the punch 2 to move down to the set end position, completing the hot pressing and shaping production of the opposite cloth 5.

[0114] (10)Completion

[0115] According to the set technical requirements, the semi-finished fabric product 6 that has been heat-pressed and shaped is cut to obtain the bra cup 7 that meets the product appearance and quality requirements.

[0116] The forming mold of the present invention has the following advantages:

[0117] (1) The forming mold of the present invention is applied to the hot pressing and shaping production of cloth molds, and has simple operation, stable production and qualified quality;

[0118] (2) When the forming mold of the present invention is used in the hot pressing and shaping production of cloth molds, the conventional double-action hot pressing and shaping machine can be directly used for production, without the cost of new equipment investment, and is suitable for promotion and application;

[0119] (3) The forming mold of the present invention is produced by hot pressing and shaping the cloth mold, without changing the equipment and operation process. The cloth of the same shape cup code is produced by hot pressing and shaping. The cloth size and area are smaller than those of the traditional technology, thus saving the amount of cloth.

[0120] (4) The molding die of the present invention is used for hot pressing and shaping of fabrics, which effectively solves the defects of hot pressing and shaping of fabrics in the bra and underwear industry, such as large amount of fabric consumption, large amount of material waste and low material utilization rate;

[0121] (5) The forming mold of the present invention performs hot pressing and shaping production of the fabric mold, which reduces the amount of fabric used, reduces fabric waste, and improves the utilization rate of materials. It is in line with the low-carbon macro policy advocated by the world and the country, has good economic and social value, and is worthy of promotion and application.

[0122] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A forming mold for a bra cup, characterized in that: The invention comprises a concave mold (1), a convex mold (2), a planar workbench (3), and an elastic layer (4); the concave mold (1) is located at the upper end of the convex mold (2); the planar workbench (3) is located between the convex mold (2) and the concave mold (1); the elastic layer (4) is arranged on the planar workbench (3); the cloth (5) is arranged on the elastic layer (4); the planar workbench (3) comprises a first through hole (31); the elastic layer (4) comprises a second through hole (41); the first through hole (31) and the second through hole (41) are capable of allowing the convex mold (2) to partially pass through; the convex mold (2) comprises a raised portion (22); the raised portion (22) comprises a cylindrical body (21); 21), the width of the outer ends of the cylindrical body (221) is W2, the width of the outer ends of the first through hole (31) is W3, wherein W3-W2=0.2-10mm; the die (1) includes a concave portion (12), the concave portion (12) includes a concave spherical surface (121), the width of the concave spherical surface (121) at both ends is W1, the width of the outer ends of the first through hole (31) is W3, W3-W1=-5~10mm; the thickness of the elastic layer (4) is H2, the value range of H2 is 0.5~10mm; the thickness of the planar workbench (3) is H1, the value range of H1 is 10~50mm.

2. The molding die according to claim 1, wherein: The male mold (2) includes a second base (21), and the first through hole (31) and the second through hole (41) are capable of allowing the raised portion (22) to pass through.

3. The forming mold according to claim 2, characterized in that: The raised portion (22) comprises a spherical body (222), one end of the cylindrical body (221) is connected to the spherical body (222), and the other end of the cylindrical body (221) is connected to the second base (21), and the second base (21) and the raised portion (22) are an integrally formed structure.

4. The molding die according to claim 1, wherein: The die (1) comprises a first base (11), the first base (11) and the recessed portion (12) are integrally formed, and the first base (11) is located at the upper end of the recessed portion (12).

5. The molding die according to claim 1, wherein: The shape of the first through hole (31) is the same as the shape of the second through hole (41).

6. A method for forming a bra cup, using the forming mold according to any one of claims 1 to 5, characterized in that: The specific steps include: S1. Install the die on the upper die table of the machine, install the punch on the lower die table of the machine, and fix the flat workbench in the middle of the die and punch. S2. Place the fabric on the upper surface of the elastic layer and flatten it as required; S3. Start the machine switch, and the upper die table of the machine drives the die to move downward until the fabric is compacted; S4, the lower die table of the machine drives the punch to move upward until the punch and the die are closed; S5. Setting the bra cup hot pressing process parameters, and hot pressing the fabric to obtain a semi-finished fabric product; S6. Separate the male mold from the female mold, and process the semi-finished fabric to obtain a bra cup.

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