Female mold plastic uptake mold for luggage forming and application of female mold plastic uptake mold

Abstract

The invention provides a female mold plastic uptake mold for luggage forming and application thereof, and relates to the technical field of plastic uptake molds, the female mold plastic uptake mold comprises an upper mold frame, a male mold adaptively connected with the upper mold frame, a lower mold frame, a female mold, a lifting platform for driving the female mold to move, and a material frame for clamping sheets; a first airflow channel penetrating through the male die is formed in the upper die frame, and the male die is driven by a driving piece to move. In the adsorption state, the upper die frame abuts against the material frame so that an upper air cavity communicating with the first airflow channel can be formed above the sheet, the first airflow channel is driven to blow air downwards to stretch the sheet, and meanwhile the male die and the female die move in the direction close to the sheet to form a forming space; the stretched sheet is attached to the female die under the gas pressure of the first gas flow channel and is evenly distributed along the forming space under the pressing of the male die; and in the mold opening state, the male mold and the female mold move in the direction away from the material frame so as to be separated from the formed sheet. Therefore, the defects of existing box shell forming are overcome.

Description

Technical Field

[0001] The invention relates to the technical field of blister moulds, in particular to a female blister mould for bag forming and application thereof. Background Art

[0002] The process of blister forming is roughly sheet cutting, sheet fixing, heating, forming, demolding, and material edge removal. Among them, forming is a crucial link. The heated sheet is adsorbed on the mold by vacuum adsorption, and the forming is completed after cooling. Existing luggage forming generally adopts positive mold blister forming. The appearance surface of the box shell formed by positive mold blister forming is on the other side of the mold forming surface. In addition, due to the influence of the sheet thickness, the lines and edges of the appearance surface are not clear during the positive mold blister forming process. In addition, during positive mold blister forming, the lines and patterns on the box shell need to be set on the sheet. After the sheet is stretched, the lines and patterns are also deformed, making it difficult to meet the design requirements. Not only that, the sheet is first stretched into a bubble shape during blister forming, such as Figure 1 The stretched sheet is thick on both sides and thin in the middle, which may cause the following problems in the subsequent forming process: Figure 2 and Figure 3 The shell shown is uneven in thickness and the edges and corners are partially too thin, so it often fails the box drop test. Summary of the invention

[0003] The invention discloses a female mold blister die for bag molding, aiming to improve the problems that the appearance of the existing box shell is difficult to meet the design requirements and the thickness of the shell is uneven.

[0004] The present invention adopts the following scheme:

[0005] A female mold blister mold for bag molding, comprising an upper mold assembly, a lower mold assembly and a material frame, wherein the upper mold assembly has an upper mold frame and a male mold adapted to be connected to the upper mold frame, the upper mold frame is provided with a first air flow channel penetrating the male mold, and the male mold is driven to move by a driving member; the lower mold assembly comprises a lower mold frame, a female mold and a lifting platform for driving the female mold to move; the material frame is installed on the lower mold frame to clamp a sheet material so that the sheet material is suspended above the lower mold frame; further, the male mold and the female mold are configured to be in an adsorption state and a mold opening state. When in the adsorption state, the upper mold frame abuts against the material frame to form an upper air cavity above the sheet that is connected to the first air flow channel. At this time, the first air flow channel blows air downward to stretch the sheet, and at the same time, the male mold and the female mold move toward the direction close to the sheet to form a molding space, so that the stretched sheet fits with the female mold under the gas pressure of the first air flow channel and is evenly distributed along the molding space under the pressure of the male mold; when in the mold opening state, the male mold and the female mold both move away from the material frame to separate from the molded sheet.

[0006] As a further improvement, the female mold has a molding surface extending downward, and the pressing surface on the male mold is configured to be similar to the molding surface. In the adsorption state, the molding space is formed between the molding surface and the pressing surface.

[0007] As a further improvement, the molding surface is provided with a textured portion and / or a bright portion.

[0008] As a further improvement, a second air flow channel is provided on the lower mold frame. When in the adsorption state, a lower air cavity connected to the second air flow channel is formed between the die and the lifting platform. At this time, the second air flow channel sucks air downward; when in the mold opening state, the second air flow channel blows air upward.

[0009] As a further improvement, the first air flow channel is arranged along the middle part of the male mold.

[0010] As a further improvement, the die is provided with a plurality of water channels, and each water channel is arranged near a right angle of the die.

[0011] A luggage female mold blister forming method is also provided, which is applied to the female mold blister forming mold as described above, and the method comprises the following steps:

[0012] When adsorbed:

[0013] S1: Fix the sheet on the material frame. After the sheet is baked, the material frame moves to the lower mold frame;

[0014] S2: driving the upper mold frame to abut against the material frame;

[0015] S3: blowing air downward through the first air flow channel to stretch the sheet into a bubble shape;

[0016] S4: The first air flow channel continues to blow air, the lifting platform drives the die to rise, and at the same time, the second air flow channel provided on the lower die frame starts to suck air;

[0017] S5: the male die descends to form a molding space with the female die, and the sheet is attached to the female die and molded with the assistance of the male die;

[0018] When opening the mold:

[0019] S6: The upper die frame drives the punch to rise synchronously;

[0020] S7: The die descends, and the second air flow channel blows air upward to separate the formed sheet from the die.

[0021] As a further improvement, during adsorption, the gas in the first gas flow channel diffuses outward and downward from the middle of the male mold.

[0022] As a further improvement, an insert may be placed on the die before adsorption, so that the insert is integrally formed with the sheet in the molding space.

[0023] A luggage female mold blister forming method is also provided, which is applied to the female mold blister forming mold as described above, and the method comprises the following steps:

[0024] When adsorbed:

[0025] S1: Place the insert on the die;

[0026] S2: Fix the sheet on the material frame. After the sheet is baked, the material frame moves to the lower mold frame;

[0027] S3: driving the upper mold frame to abut against the material frame;

[0028] S4: blowing air downward through the first air flow channel to stretch the sheet into a bubble shape;

[0029] S5: The first air flow channel continues to blow air, and the lifting platform drives the die to rise. At the same time, the second air flow channel provided on the lower die frame starts to suck air, so that the insert on the die is formed integrally with the sheet;

[0030] When opening the mold:

[0031] S6: The die descends, and the second air flow channel blows air upward to separate the formed sheet from the die.

[0032] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0033] 1. The sheet is adsorbed on the die to form, which makes the appearance of the box shell fit with the die to ensure that the lines, textures, edges and corners of the appearance meet the design requirements of the appearance. By setting a convex mold on the upper mold frame, the convex mold is used to cooperate with the die to form a molding space for the sheet to be formed. When the sheet is formed, one side fits with the die and the other side is pressed by the convex mold, so that it is evenly distributed in the molding space, making the thickness of the box uniform, ensuring the strength of the box, reducing corner protection and other decorations, reducing costs, and improving market competitiveness.

[0034] 2. Most of the existing plastic blister molds for bags are male molds, which require lines to be set on the sheet. However, the sheets will be deformed to varying degrees when stretched, and it is also impossible to form a local glossy or matte surface. The present application provides a lined part and / or a glossy part on the molding surface of the concave mold. For example, the flat part of the molding surface is provided with lines, and the raised or recessed part is set to be bright, or vice versa, without specific limitation, so as to achieve local lines or brightness. By forming lines on the molding surface of the concave mold, it can be ensured that the lines will not be deformed by the stretching of the sheet, and the lines are clear and beautiful.

[0035] 3. Before adsorption, an insert can be placed on the die, so that the insert is integrally formed with the sheet in the molding space, thereby reducing assembly. The insert can be a tie rod seat. When molding the upper shell of the box, the tie rod seat is not required. When molding the lower shell of the box, the tie rod seat is placed at the tie rod seat position, so that the insert and the lower shell are integrally formed, thereby realizing the upper shell and the lower shell share the mold and reducing the mold cost. In addition, the tie rod seat is integrally formed with the lower shell, which can prevent the tie rod seat from exceeding the surface of the lower shell, and improve the assembly integrity and surface quality of the whole box. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a schematic diagram of the structure when the sheet is stretched;

[0038] Figure 2 It is a schematic diagram of the structure of the stretched sheet being formed on the male mold;

[0039] Figure 3 yes Figure 2 Sheet after forming;

[0040] Figure 4 is a schematic structural diagram of one embodiment of the present invention in an adsorption state;

[0041] Figure 5 It is a structural schematic diagram of an upper mold frame abutting against a material frame according to one embodiment of the present invention;

[0042] Figure 6 It is a schematic structural diagram of a molded sheet according to one example of the present invention;

[0043] Figures 7 to 9 A schematic diagram of the structure of the shell;

[0044] Fig.10 It is a schematic structural diagram of an insert placed on a die according to one embodiment of the present invention.

[0045] Icons: 11-upper mold frame; 111-first air flow channel; 112-upper air cavity; 113-receiving plate;

[0046] 12-punch;

[0047] 21-lower mold frame; 211-second air flow channel; 212-lower air cavity;

[0048] 22-die; 221-waterway;

[0049] 23-lifting platform;

[0050] 31- material frame;

[0051] 41-sheet; 411-bright surface; 412-matte surface;

[0052] 51-Insert;

[0053] 61-housing; 611-pull rod seat position; 612-placing slot. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0055] Example

[0056] Combination Figures 4 to 6This embodiment provides a female mold blister mold for bag molding, including an upper mold assembly, a lower mold assembly and a material frame 31. The upper mold assembly has an upper mold frame 11 and a male mold 12 adapted to be connected to the upper mold frame 11. The upper mold frame 11 is provided with a first airflow channel 111 that penetrates the male mold 12. The male mold 12 is driven to move by a driving member configured on the upper mold frame 11; the lower mold assembly includes a lower mold frame 21, a female mold 22 and a lifting platform 23 for driving the female mold 22 to move; the material frame 31 is installed on the lower mold frame 21 to clamp the sheet 41 so that the sheet 41 is suspended above the lower mold frame 21; further, the male mold 12 and the female mold 22 are configured to switch between an adsorption state and a mold opening state. When in an adsorption state, the male mold 12 and the female mold 22 are in an adsorption state. In the closed state, the upper mold frame 11 abuts against the material frame 31 to form an upper air cavity 112 above the sheet 41 that is connected to the first air flow channel 111. At this time, the first air flow channel 111 blows air downward to stretch the sheet 41. At the same time, the punch 12 and the die 22 move toward the direction close to the sheet 41 to form a molding space, so that the stretched sheet 41 fits with the die 22 under the gas pressure of the first air flow channel 111, and is evenly distributed along the molding space under the pressure of the punch 12; when in the open mold state, the punch 12 and the die 22 both move toward a position away from the material frame 31 to separate from the molded sheet 41.

[0057] It should be noted that, in this embodiment, a punch 12 is provided on the upper mold frame 11, and the punch 12 is used to cooperate with the die 22 to form a molding space for the sheet 41 to be molded. When the sheet 41 is molded, one side is in contact with the die 22 and the other side is pressed by the punch 12, so that it is evenly distributed in the molding space, making the thickness of the box body uniform, ensuring the strength of the box body, reducing decorations such as corner guards, reducing costs, and improving market competitiveness.

[0058] Specifically, the concave mold 22 has a molding surface extending downward, and the pressing surface on the convex mold 12 is configured to be similar to the molding surface. When in the adsorption state, a molding space is formed between the molding surface and the pressing surface. Preferably, a texture part and / or a bright part are provided on the molding surface. For example, the plane part of the molding surface is configured to be textured, and the raised or recessed part is configured to be bright, so as to form a matte surface 412 and a bright surface 411, or vice versa, the raised or recessed part is configured to be textured, and the plane part is configured to be bright, without specific limitation, so as to achieve local texture or brightness. In addition, most of the existing luggage blister molds are male molds. If the texture is to be formed, the texture needs to be set on the sheet. The sheet will be deformed to varying degrees when stretched, and it is impossible to form a local bright surface or matte surface. In this embodiment, by arranging the texture on the molding surface of the concave mold 22, it can be ensured that the texture will not be deformed by the stretching of the sheet 41, and the texture is clear and beautiful.

[0059] On the basis of the above-mentioned embodiments, in an optional embodiment of the present invention, a second air flow channel 211 is provided on the lower mold frame 21. When in the adsorption state, a lower air cavity 212 connected to the second air flow channel 211 is formed between the die 22 and the lifting platform 23. At this time, the second air flow channel 211 sucks air downward; when in the mold opening state, the second air flow channel 211 blows air upward. Among them, the two sides of the die 22 are fitted and limited with the lower mold frame 21 to ensure that the die 22 will not deviate during the movement. It should be noted that in this embodiment, the first air flow channel 111 is connected to the upper air valve. Specifically, the upper air valve can be connected to the air inlet on the punch 12 through a hose or a spring tube, and the second air flow channel 211 is connected to the lower air valve. The control principle of the air valve is the prior art and will not be repeated here. The second air flow channel 211 assists in adsorption so that the sheet 41 is evenly stressed during molding and can better fit with the die 22. When the mold is opened, the second air flow channel 211 blows air upward to ensure smooth demolding of the die 22 and the molded sheet 41.

[0060] In one embodiment, the driving member is preferably a cylinder, and the punch 12 is fixedly connected to the receiving plate 113 on the upper mold frame 11, and the receiving plate 113 is driven by the cylinder to drive the punch 12 to rise or fall. It is not limited to this. In other embodiments, the driving member is also driven by other structures. Preferably, the first air flow channel 111 is arranged along the middle of the punch 12, and can be composed of a plurality of small air holes to avoid the hole position being too large to affect the forming of the sheet 41. Since the box body is generally large in size, a plurality of water channels 223 can be provided on the die 22, and each water channel 223 is arranged near the right angle of the die 22, so that the formed sheet 41 can be quickly cooled and formed, thereby accelerating production efficiency.

[0061] A luggage negative mold blister forming method is also provided, which is applied to the application of the negative mold blister mold as described above in the preparation of luggage, and comprises the following steps:

[0062] When adsorbed:

[0063] S1: Fix the sheet 41 on the material frame 31 and suspend it above the lower mold frame 21. After the sheet 41 is baked, the material frame 31 moves to the lower mold frame 21;

[0064] S2: heating the sheet 41 to drive the upper mold frame 11 to abut against the material frame 31, so that an upper air cavity 112 is formed above the upper mold frame 11 and the sheet 41;

[0065] S3: the first air flow channel 111 blows air downward to stretch the sheet 41 into a bubble shape;

[0066] S4: The first air flow channel 111 continues to blow air, and the lifting platform 23 drives the die 22 to rise. At the same time, the second air flow channel 211 provided on the lower die frame 21 starts to suck air, and the two sides of the sheet 41 are pressurized to ensure balanced force.

[0067] S5: the male die 12 descends to form a molding space with the female die 22, and the sheet 41 is attached to the female die 22 and is molded with the assistance of the male die 12;

[0068] When opening the mold:

[0069] S6: The upper die frame 11 drives the punch 12 to rise synchronously;

[0070] S7: the die 22 descends, and the second air flow channel 211 blows air upward to separate the formed sheet 41 from the die 22 .

[0071] It should be mentioned that during adsorption, the gas in the first air flow channel 111 diffuses outward and downward from the middle of the male mold 12 , further ensuring that the sheet 41 is subjected to uniform force.

[0072] In a preferred embodiment, an insert 51 can be placed on the die 22 before adsorption, so that the insert 51 is integrally formed with the sheet 41 in the molding space, thereby reducing assembly. The insert 51 can be a tie rod seat, combined with Figure 7 When molding the upper shell of the box body, the tie rod seat is not required. When molding the lower shell of the box body, the tie rod seat is placed at the tie rod seat position 611, so that the insert 51 is integrally molded with the lower shell, thereby realizing that the upper shell and the lower shell share a mold. At the same time, the tie rod seat and the lower shell are integrally molded, which can prevent the tie rod seat from exceeding the surface of the lower shell 61 and improve the surface quality. The insert 51 can also be a decorative ring, a decorative strip, etc., combined with Figure 8 and 9 In the existing shell 61 molding, if it is necessary to add a decorative piece to the shell 61, a placement groove 612 needs to be processed on the shell 61 by a later machining method. In this embodiment, Fig.10 , it is only necessary to place the required decorative parts on the molding surface of the concave mold 22 to form an integral body with the sheet 41, thereby strengthening the strength of the shell 61 and beautifying the shell 61. In addition, the shape and position of the insert 51 are not fixed, which can achieve more appearance molding and improve the versatility of the mold. In other embodiments, a metal foil can also be placed on the concave mold 22 to achieve a hot stamping effect. A diaphragm with a pattern can also be placed on the concave mold 22 to achieve accurate positioning and adsorption of the pattern to the surface of the box shell. In the existing box shell blister molding, the pattern is printed on the surface of the sheet. When the sheet is stretched and deformed, the printed pattern is obviously deformed. In this embodiment, the diaphragm pattern can be directly placed on the molding surface of the concave mold, and the diaphragm pattern is not adsorbed and stretched, thereby ensuring that the pattern will not be stretched and deformed.

[0073] In another bag female mold blister forming method, the following steps are included:

[0074] When adsorbed:

[0075] S1: placing the insert 51 on the die 22;

[0076] S2: Fix the sheet 41 on the material frame 31 and suspend it above the lower mold frame 21. After the sheet 41 is baked, the material frame 31 moves to the lower mold frame 21;

[0077] S3: driving the upper mold frame 11 to abut against the material frame 31 so that an upper air cavity 112 is formed above the upper mold frame 11 and the sheet 41;

[0078] S4: the first air flow channel 111 blows air downward to stretch the sheet 41 into a bubble shape;

[0079] S5: The first air flow channel 111 continues to blow air, and the lifting platform 23 drives the die 22 to rise. At the same time, the second air flow channel 211 provided on the lower mold frame 21 starts to absorb air, and the two sides of the sheet 41 are pressurized to ensure the adsorption strength, so that the insert 51 on the die 22 and the sheet 41 are integrally formed;

[0080] When opening the mold:

[0081] S6: the die 22 descends, and the second air flow channel 211 blows air upward to separate the formed sheet 41 from the die 22 .

[0082] It should be noted that in this embodiment, the punch 12 can be controlled not to be lowered, and the punch 12 can be removed when necessary to facilitate the placement and removal of the insert 51 and to avoid interference between the insert 51 and the punch 12 when the thickness of the insert 51 is too large.

[0083] The above are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

Claims

1. A female blister mold for bag forming. It is characterized in that include: An upper mold assembly comprises an upper mold frame and a male mold adapted to be connected to the upper mold frame, wherein the upper mold frame is provided with a first air flow channel penetrating the male mold, and the male mold is driven to move by a driving member; A lower die assembly, comprising a lower die frame, a concave die, and a lifting platform for driving the concave die to move; A material frame is installed above the lower mold frame and is used to clamp the sheet material so that the sheet material is suspended above the lower mold frame; In which, the male mold and the female mold are constructed to switch between an adsorption state and an open mold state. When in the adsorption state, the upper mold frame abuts against the material frame to form an upper air cavity connected to the first air flow channel above the sheet. At this time, the first air flow channel blows air downward to stretch the sheet. At the same time, the male mold and the female mold move toward the direction close to the sheet to form a molding space, so that the stretched sheet fits with the female mold under the gas pressure of the first air flow channel, and is evenly distributed along the molding space under the pressure of the male mold; when in the open mold state, the male mold and the female mold both move away from the material frame to separate from the molded sheet.

2. The female blister mold for bag forming according to claim 1, It is characterized in that The concave mold has a molding surface extending downward, and the pressing surface on the convex mold is arranged in the same shape as the molding surface. In the adsorption state, the molding space is formed between the molding surface and the pressing surface.

3. The female blister mold for bag forming according to claim 2, It is characterized in that The molding surface is provided with a textured portion and / or a bright portion.

4. The female blister mold for bag forming according to claim 1, It is characterized in that The lower mold frame is provided with a second air flow channel. When in the adsorption state, a lower air cavity connected to the second air flow channel is formed between the die and the lifting platform. At this time, the second air flow channel sucks air downward; when in the mold opening state, the second air flow channel blows air upward.

5. The female blister mold for bag forming according to claim 1, It is characterized in that The first air flow channel is arranged along the middle portion of the male mold.

6. The female blister mold for bag forming according to claim 1, It is characterized in that The die is provided with a plurality of water channels, and each water channel is arranged near a right angle of the die.

7. A method for forming a female mold of a bag by vacuum forming. It is characterized in that Applied to the female mold blister mold as claimed in claim 4, the method comprises the following steps: When adsorbed: S1: Fix the sheet on the material frame. After the sheet is baked, the material frame moves to the lower mold frame; S2: driving the upper mold frame to abut against the material frame; S3: blowing air downward through the first air flow channel to stretch the sheet into a bubble shape; S4: The first air flow channel continues to blow air, the lifting platform drives the die to rise, and at the same time, the second air flow channel provided on the lower die frame starts to suck air; S5: the male die descends to form a molding space with the female die, and the sheet is attached to the female die and molded with the assistance of the male die; When opening the mold: S6: The upper die frame drives the punch to rise synchronously; S7: The die descends, and the second air flow channel blows air upward to separate the formed sheet from the die.

8. The luggage female mold blister forming method according to claim 7, It is characterized in that During adsorption, the gas in the first gas flow channel diffuses outward and downward from the middle of the male mold.

9. The luggage female mold blister forming method according to claim 7, It is characterized in that Before adsorption, an insert can be placed on the concave mold so that the insert is integrally formed with the sheet in the molding space.

10. A method for forming a female mold of a bag by vacuum forming. It is characterized in that Applied to the female mold blister mold as claimed in claim 4, the method comprises the following steps: When adsorbed: S1: Place the insert on the die; S2: Fix the sheet on the material frame. After the sheet is baked, the material frame moves to the lower mold frame; S3: driving the upper mold frame to abut against the material frame; S4: blowing air downward through the first air flow channel to stretch the sheet into a bubble shape; S5: The first air flow channel continues to blow air, and the lifting platform drives the die to rise. At the same time, the second air flow channel provided on the lower die frame starts to suck air, so that the insert on the die is formed integrally with the sheet; When opening the mold: S6: The die descends, and the second air flow channel blows air upward to separate the formed sheet from the die.

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