A molding die for bra cups and its molding method

Abstract

This invention provides a molding die and method for forming a bra cup, comprising a first mold assembly and a second mold assembly. The first mold assembly and the second mold assembly heat-press and shape a cut piece into a bra cup. The first mold assembly includes a concave mold, and the second mold assembly includes a pressing device and a convex mold. The pressing device is connected to the convex mold via a third connecting member, and the pressing device pre-presses the cut piece. The bra cup forming method of this invention, by using a pressing device to pre-press the cut piece, can, on the one hand, accurately position the cut piece, preventing displacement during heat pressing and affecting the production quality of the bra cup; on the other hand, it can reduce the amount of cut piece used, thus lowering the production cost of the bra cup.

Description

Technical Field

[0001] This invention relates to the field of clothing technology, and more specifically, to a molding die for a bra cup and a molding method thereof. Background Technology

[0002] Current bra cup heat pressing and shaping: Material pieces are placed on a mold, the mold closes, and the material pieces are dragged and squeezed into the mold for heat pressing and shaping. The material pieces are in a free state without constraints. When the material pieces are subjected to external force from the mold, the material is dragged into the mold cavity according to the shape of the mold structure and the distribution of external force.

[0003] To ensure that bra cup products do not suffer from material shortages after heat pressing and shaping, traditional bra cup molds are used in production by increasing the size of the material pieces. This increases the amount of material used to prevent the material pieces from being dragged and squeezed into the mold during production. Because the process of dragging and squeezing material into the mold is irregular and uncontrollable in traditional mold production, the actual amount of material used far exceeds the effective amount used. This is necessary to guarantee the quality pass rate of bra cups produced in batches and to achieve smooth and stable production of qualified bra cups. Using traditional molds to produce bra cups results in a large amount of material used compared to the effective material used in the cup production, leading to significant material waste, high material costs, and low product market competitiveness.

[0004] Prior art, disclosed in CN103535874A, discloses a molding die for bra cups, including an upper die and a lower die. The upper die is a punch, and the lower die is a concave die. The concave curvature of the lower die is greater than the convex curvature of the upper die. The back of the lower die is concave towards one side of the mold to form a first cavity, and the back of the upper die is concave towards one side of the mold to form a second cavity. Both the first and second cavities have arc-shaped cross-sections. The thickness of the lower and upper dies gradually increases from the lowest to the highest point of the concave curvature of the first and second cavities. However, in the bra cup molding process described in this prior art, a cut piece needs to be covered on the concave die, resulting in a large amount of material usage and a large amount of scrap material in the resulting cups, requiring additional manual trimming, thus increasing the cost of bra cup production. Summary of the Invention

[0005] In view of this, the present invention aims to provide a molding die and molding method for bra cups. This addresses the problem in the prior art where, during the molding process of bra cups, a cut piece needs to be covered onto the concave mold, resulting in excessive material usage and excess material around the edges of the resulting cup, requiring additional manual trimming and leading to high production costs.

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

[0007] A molding die for a bra cup includes a first mold assembly and a second mold assembly. The first mold assembly and the second mold assembly heat-press and shape a cut piece into a bra cup. The first mold assembly includes a concave die, and the second mold assembly includes a pressing device and a convex die. The pressing device is connected to the convex die via a third connector, and the pressing device pre-presses the cut piece. This pre-pressing of the cut piece ensures precise positioning, preventing displacement during heat pressing and affecting the quality of the bra cup. Furthermore, it reduces the amount of cut piece used, lowering the production cost of the bra cup.

[0008] Furthermore, the clamping device includes a piece clamping component and a power component, wherein the piece clamping component is connected to the power component via a piece clamping connector. The piece clamping connector makes the connection between the piece clamping component and the power component more secure.

[0009] Furthermore, the punch includes a punch body, a punch mounting base, and a surrounding wall. A material groove is provided on the punch mounting base, and the material groove is located between the punch body and the surrounding wall. Pre-compression of the cut pieces can be achieved on the material groove.

[0010] Furthermore, the cut piece clamping component includes a cut piece pressing head and a limiting part. The end of the cut piece pressing head near the punch mounting base contacts the cut piece, and the end of the cut piece pressing head away from the punch mounting base is connected to the limiting part.

[0011] Furthermore, the power component includes a power rod and a fixing member, the power rod being slidably connected to the fixing member, and the power rod being located within the cavity of the fixing member. This slidable connection allows for adjustment of the height of the cut piece clamping member by moving the power rod.

[0012] Furthermore, the third connecting member is a heat insulation component, which is made of high-temperature resistant heat insulation material. The heat insulation component separates the pressing device from the punch, thereby providing heat insulation protection for the pressing device.

[0013] A method for molding a bra cup, using the molding die described above, specifically includes the following steps:

[0014] S1: Install the concave and convex molds, and set the production process parameters for the bra cups;

[0015] S2: Pre-compression process of cut pieces;

[0016] S3: The concave die moves down and closes with the convex die. After hot pressing and shaping, a shaped cup is obtained.

[0017] S4: The punch and die are separated and processed to obtain the bra cup.

[0018] By adding a pre-compression process to the cut pieces, not only is the production quality of the bra cups guaranteed, but the amount of materials used is also reduced, thus lowering production costs.

[0019] Further, step S2 includes the following steps:

[0020] S21: In the mold-open state, start the clamping device and adjust the cut piece clamping parts to a certain position;

[0021] S22: Place the cut piece onto the punch;

[0022] S23: The cut piece clamping component moves to a certain position to achieve pre-compression and fixation of the cut piece.

[0023] The pre-compression process of the cut pieces is achieved by adjusting the position of the cut piece clamping parts. This pre-compression process does not affect the original equipment, does not require additional investment or technical training, is simple to operate, and can be widely promoted.

[0024] Further, step S4 includes the following steps:

[0025] S41: Separation of punch and die;

[0026] S42: The clamping connector separates from the shaping cup;

[0027] S43: Trim excess material from the molded cups to obtain the bra cups.

[0028] Furthermore, step S23 includes activating the control switch for pre-compressing the material, moving the power rod downwards, and driving the cutting piece pressure head downwards together. The cutting piece pressure head presses the pre-compressed cutting piece material into the material groove position of the punch, thereby achieving pre-compressing and fixing of the cutting piece.

[0029] Compared to existing technologies, the bra cup molding die and molding method described in this invention have the following advantages:

[0030] 1) The production of bra cups using the molding mold and molding method of the bra cup described in this invention can directly use the traditional bra cup production equipment, processes, materials, etc., without the need for additional investment and technical training, and is suitable for large-scale promotion and application.

[0031] 2) Using the molding die described in this invention to produce bra cups significantly reduces the amount of materials used, directly lowering product material costs and enhancing the market competitiveness of bra cups.

[0032] 3) The molding die of the present invention is equipped with a clamping device, which can pre-clamp the cut pieces. Since some cut pieces have been pre-clamped and fixed, the cut pieces that have not been pre-clamped will not or will have little displacement when subjected to the surface force of the concave die and the convex die. This can achieve precise positioning of the hot-pressing and shaping of the cut pieces, ensuring the quality of the bra cups on the one hand, and producing bra cup products of the same specifications and quality with smaller materials on the other hand. The amount of material used is significantly reduced, which reduces the material cost of the bra cup products. This is in line with the corporate social responsibility of low carbon and environmental protection, and has good corporate and social value, as well as good application value and competitiveness. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the cut piece of the present invention when the punch and die are closed;

[0034] Figure 2 This is a front view of the punch of the present invention;

[0035] Figure 3 for Figure 2 Top view;

[0036] Figure 4 This is a front view of the die of the present invention;

[0037] Figure 5 for Figure 4 A bottom view;

[0038] Figure 6 This is a schematic diagram of the mounting structure of the punch and die of the present invention;

[0039] Figure 7 This is a schematic diagram of the separate punch and die structure of the present invention;

[0040] Figure 8 This is a schematic diagram of the structure of the punch on which the cutting piece is placed according to the present invention;

[0041] Figure 9 This is a schematic diagram of the structure of the cutting piece fixing punch of the present invention;

[0042] Figure 10 This is a schematic diagram of the hot pressing and shaping structure of the cut pieces according to the present invention;

[0043] Figure 11 This is a schematic diagram of the separated punch and die structure after hot pressing and shaping according to the present invention;

[0044] Figure 12 This is a schematic diagram of the cut piece pressing component separation structure of the present invention;

[0045] Figure 13 This is a schematic diagram of the structure after the cut piece of the present invention has been removed;

[0046] Figure 14 This is a schematic diagram of the standardized cut piece structure of the present invention;

[0047] Figure 15 This is a schematic diagram of the cup structure of the present invention.

[0048] Explanation of reference numerals in the attached figures:

[0049] 1-Die, 11-Die body, 111-Die outline, 12-Die mounting base, 2-Cut piece, 21-Cut piece positioning line, 22-Pre-compressed cut piece material, 23-Shaped cut piece, 24-Bra cup, 3-Punch, 31-Punch body, 311-Punch cup ring line, 32-Punch mounting base, 321-Material trough, 33-Wall side, 331-First side, 332-Second side, 333-Third side, 4-Cut piece clamping component, 41-Cut piece pressing head, 42-Limiting part, 5-Power component, 51-Power rod, 52-Fixing component, 6-Heat insulation component, 7-Die fastener, 8-Cut piece clamping connector. Detailed Implementation

[0050] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0051] This invention relates to a molding die for bra cups, such as... Figure 1-15 As shown, it includes a first mold assembly and a second mold assembly, which can heat-press and shape the cut piece 2 into a bra cup 24.

[0052] Specifically, the first mold assembly includes a concave mold 1, which includes a concave mold body 11 and a concave mold mounting base 12. The concave mold body 11 is mounted on the concave mold mounting base 12. A concave mold outline 111 is provided on the side surface of the concave mold body 11 away from the concave mold mounting base 12. The shape of the concave mold outline 111 corresponds to the bra cup 24. Preferably, the concave mold mounting base 12 is a cuboid structure.

[0053] Specifically, the second mold assembly includes a clamping device and a punch 3. The clamping device is connected to the punch 3 via a third connector, and the clamping device pre-clamps the cut piece 2. Pre-clamping the cut piece 2 enables precise positioning during hot pressing.

[0054] Preferably, the third connecting member is a heat insulation member 6, which separates the pressing device from the punch 3, thereby achieving heat insulation protection for the pressing device.

[0055] Preferably, the heat insulation component is made of a high-temperature resistant heat insulation material.

[0056] Preferably, according to the specifications and shape of the bra cup product, the pressing device can be set to N, where N ranges from 1 to 20, to realize the pre-pressing and fixing function of the cut piece 2. Preferably, the pressing device is set to 3.

[0057] Specifically, the pressing device includes a piece pressing component 4 and a power component 5. The piece pressing component 4 is connected to the power component 5 via a piece pressing connector 8. Preferably, there are multiple piece pressing connectors, specifically two connectors. The piece pressing connector 8 makes the connection between the piece pressing component 4 and the power component 5 more secure. The piece pressing component 4 initially positions the piece 2, achieving pre-pressing of the piece 2. Specifically, the end of the piece pressing component 4 closest to the worktable pre-presses the piece 2, and the end of the piece pressing component 4 furthest from the worktable is connected and fixed to the power component 5 via the piece pressing connector 8.

[0058] Specifically, the cutting piece pressing component 4 includes a cutting piece pressing head 41 and a limiting part 42. The end of the cutting piece pressing head 41 near the worktable contacts the cutting piece 2. Preferably, the end of the cutting piece pressing head 41 near the worktable has a tapered structure that is wider at the top and narrower at the bottom, so that the cutting piece is pressed more firmly. The end of the cutting piece pressing head away from the worktable is connected to the limiting part 42. The punch 3 is provided with a retaining wall 33, which limits the cutting piece pressing head 41, so that the limiting part 42 can pre-press the cutting piece 2 within a certain range. Specifically, the height of the cutting piece pressing head 41 is greater than or equal to the height of the retaining wall 33.

[0059] The power component 5 provides power to the cut piece clamping component 4. Preferably, the power component 5 can be a pneumatic power source, an electric power source, a mechanical power source, etc. Specifically, the power component 5 provides power to the cut piece clamping component 4 to realize the lifting and lowering of the cut piece clamping component 4. The power component 5 includes a power rod 51 and a fixing component 52. The power rod 51 is slidably connected to the fixing component 52. The power rod 51 is located in the cavity of the fixing component 52 and can move up and down through the fixing component 52, thereby adjusting the height of the cut piece clamping component 4.

[0060] Preferably, the displacement of the power rod 51 is not less than the height of the wall edge 33 of the punch 3.

[0061] Specifically, the end of the power rod 51 furthest from the worktable is connected to the limiting part 42 via the cut piece clamping connector 8. The other end of the power rod 51, closer to the worktable, is connected to the fixing member 52, and the outer side of the fixing member 52 is connected to the heat insulation member 6 via the mold fastener 7.

[0062] Preferably, there are multiple mold fasteners 7, and more preferably, there are two mold fasteners.

[0063] Specifically, the punch 3 includes a punch body 31, a punch mounting base 32, and a surrounding wall 33. The punch body 31 is mounted on the punch mounting base 32, and the surrounding wall 33 is connected to the heat insulation component 6. The die body 11 has a punch cup ring line 311 on the side surface away from the punch mounting base 32. The shape of the punch cup ring line 311 corresponds to the bra cup 24. Preferably, the punch mounting base 32 is a cuboid structure.

[0064] Specifically, a material groove 321 is provided on the punch mounting base 32. The material groove 321 is located in the empty area between the punch cup ring line 311 and the wall edge 33. The material groove 321 is a ring-shaped or strip-shaped structure, etc., and the edge lines on both sides are regular or irregular lines. It is used to place the material pieces that need to be pre-pressed and tightened before mold closing. The area width of the material groove 321 is w. The width of each position can be the same or different, depending on the design structure and shape of the bra cup. The width range of the material groove is W = 3-50mm.

[0065] Specifically, the enclosure side 33 includes a first side 331, a second side 332, and a third side 333. The first side 331 is located on the inner side of the enclosure side 33 and close to the punch body 31. The second side 332 is located on the upper side of the enclosure side 33 and close to the limiting part 42. The third side is located on the outer side of the enclosure side and is connected to the heat insulation component. The angle formed by the first side 331 and the material groove 321 is A, where the value of A ranges from 90 to 150°. Setting A makes it easier to place the cut piece on the punch, which is beneficial for the hot pressing and shaping production of the cut piece.

[0066] Specifically, the concave mold 1 is installed at the upper part of the hot pressing and shaping machine, and the convex mold 3 is installed at the lower part of the hot pressing and shaping machine. The installation, heating, and operation are carried out in accordance with the equipment operation specifications of the hot pressing and shaping machine to realize the production of bra cups.

[0067] A method for molding a bra cup, using the molding mold described above, specifically includes the following steps;

[0068] S1: Install the concave and convex molds, and set the production process parameters for the bra cups;

[0069] Specifically, the concave and convex molds are installed on a hot pressing and shaping machine, and the temperature, air pressure, time, and minimum distance between the concave and convex molds are set according to the process requirements of bra cups. Figure 6 As shown.

[0070] Preferably, the surface temperature range of the cut piece during hot pressing is set to 160-260℃. The actual surface temperature of the cut piece during hot pressing needs to be adjusted and applied according to the physical properties, structure, thickness, etc. of the cup material.

[0071] S2: Pre-compression process of cut pieces;

[0072] S21: In the mold-open state, start the clamping device and adjust the cut piece clamping parts to a certain position;

[0073] Start the hot pressing and shaping machine. The upper and lower parts of the machine separate, and the die moves and separates with the machine. Activate the control switch for the pre-pressed cut pieces. The power rod of the power unit moves upward, reaching its highest position. The cut piece pressing head of the cut piece clamping component is at its highest position, at which point the cut piece pressing head is furthest from the material trough. Figure 7 As shown, it is now easier to place the cut piece onto the punch.

[0074] S22: Place the cut piece onto the punch;

[0075] Take the cut piece to be hot-pressed and shaped, and place it on the punch. The cut piece should be aligned with the edge of the punch's surrounding wall. The cut piece 2 includes a cut piece positioning line 21, a pre-compressed cut piece material 22, and a shaped cut piece 23. The cut piece positioning line 21 should be as close as possible to the first edge 331 of the punch's surrounding wall. Figure 8 As shown.

[0076] S23: The cut piece clamping component moves to a certain position to achieve pre-compression and fixation of the cut piece.

[0077] When the control switch for pre-compressing material is activated, the power rod of the power unit moves downward, causing the cutting piece pressing head of the cutting piece clamping component to move downward as well. When it reaches the lowest position, the cutting piece pressing head presses the pre-compressed cutting piece material 22 against the material groove position of the punch, and no longer moves downward, thus achieving pre-compressing and fixing of the pre-compressed cutting piece material 22. During the subsequent extrusion of the cutting piece by the die and punch, the material at the pre-compressed position will not move or will only have a slight displacement, such as... Figure 9 As shown;

[0078] S3: The concave die moves down and closes with the convex die. After hot pressing and shaping, a shaped cup is obtained.

[0079] After the pre-pressing and fixing of the cut pieces is completed, the hot pressing and shaping switch of the equipment is activated. The concave and convex molds close as the equipment moves, thereby extruding and hot-pressing the shaped cut pieces 23 to obtain the shaped cups, such as... Figure 10 As shown.

[0080] Preferably, when the die and punch are closed, the distance H between the die and the minimum position of the shaping piece 23 is 0.1-10mm.

[0081] During the closing process of the die and punch, because the pre-compressed cut piece material 22 has been pre-compressed and fixed, the shaped cut piece 23 associated with the pre-compressed cut piece material 22 will not undergo much or little displacement when subjected to the surface forces of the die and punch. This allows for precise positioning and hot pressing of the shaped cut piece 23, with minimal material compensation requirements. The resultant force on the shaped cut piece has a significant directionality, and the compensation of the cut piece material during the die and punch closing process has the same directionality as the resultant force. This can significantly reduce material size and produce qualified bra cups, such as... Figure 15 As shown.

[0082] S4: The punch and die are separated and processed to obtain the bra cup.

[0083] Step S4 also includes the following steps:

[0084] S41: Separation of punch and die;

[0085] S42: The clamping connector separates from the shaping cup;

[0086] S43: Trim excess material from the molded cups to obtain the bra cups.

[0087] Specifically, after the cup is hot-pressed and shaped in the mold according to the predetermined process parameters and hot-pressing time, the hot-pressing equipment separates, and the concave mold and convex mold automatically separate with the equipment. Figure 11 As shown.

[0088] When the control switch for releasing the pre-compressed material is activated, the power rod of the power unit moves upward, causing the cutting piece pressure head of the cutting piece clamping component to move upward as well, until the cutting piece pressure head moves away from the pre-compressed cutting piece material clamping position. Figure 12 As shown.

[0089] Finally, the production of the molded cup of this invention is completed, and the material after hot pressing and molding is taken out as follows: Figure 13 As shown, a molded cup with process positioning material is obtained, such as... Figure 14 As shown;

[0090] According to the production process documents, excess material is cut and removed to obtain qualified bra cups (size 24). Figure 15 As shown.

[0091] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A forming mold for a bra cup, comprising a first mold component, a second mold component, the first mold component and the second mold component heat-pressing a pattern piece (2) into a bra cup (24), characterized in that, The first die assembly comprises a female die (1), the second die assembly comprises a pressing device and a male die (3), the pressing device is connected with the male die (3) through a third connecting piece, and the pressing device pre-presses the cutting piece (2); The pressing device comprises a cutting piece pressing piece (4) and a power component (5), the cutting piece pressing piece (4) is connected with the power component (5) through a cutting piece pressing connecting piece (8); The male die (3) comprises a male die main body (31), a male die mounting base (32) and a wall edge (33); The cutting piece pressing piece (4) comprises a cutting piece pressing head (41) and a limiting part (42), one end of the cutting piece pressing head (41) close to the male die mounting base (32) is in contact with the cutting piece (2), and the other end of the cutting piece pressing head (41) away from the male die mounting base (32) is connected with the limiting part (42); The power component (5) comprises a power rod (51) and a fixing piece (52), the power rod (51) is in sliding connection with the fixing piece (52), and the power rod (51) is located in a cavity of the fixing piece (52); The wall edge (33) limits the cutting piece pressing head (41), so that the limiting part (42) can pre-press the cutting piece (2) within a certain range; the height of the cutting piece pressing head (41) is greater than or equal to the height of the wall edge (33).

2. The forming mold of claim 1, wherein A material groove (321) is arranged on the male die mounting base (32), and the material groove (321) is located between the male die main body (31) and the wall edge (33).

3. The forming mold of claim 1, wherein The third connecting piece is a heat insulation piece, and the heat insulation piece is made of high-temperature-resistant heat insulation material.

4. A method of forming a bra cup, characterized by, The forming die comprises the following steps: S1: install the female die and the male die, and set the bra cup production process parameters; S2: cutting piece pre-pressing process; S3: the female die moves downward, and the female die and the male die are combined, and the hot pressing is performed to obtain a shaped cup; S4: the male die and the female die are separated, and a bra cup is obtained after processing.

5. The molding method according to claim 4, characterized by Step S2 comprises the following steps: S21: in the open die state, the pressing device is started, and the cutting piece pressing piece is adjusted to a certain position; S22: the cutting piece is placed on the male die; S23: the cutting piece pressing piece moves to a certain position to realize the pre-pressing of the cutting piece.

6. The molding method according to claim 4, wherein Step S4 comprises the following steps: S41: the male die and the female die are separated; S42: the pressing connecting piece is separated from the shaped cup; S43: the shaped cup is cut to obtain a bra cup.

7. The molding method according to claim 5, wherein Step S23 comprises starting a pre-pressing material control switch, moving the power rod downward, moving the cutting piece pressing head downward, pre-pressing the cutting piece material in the material groove position of the male die by the cutting piece pressing head, and realizing the pre-pressing of the cutting piece.

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