NEGATIVE FORM FOR LUGGAGE SHAPING AND APPLICATION OF IT

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of blister molds, and in particular to a negative mold for luggage molding and an application thereof.BACKGROUND

[0002] The process of blister molding roughly includes sheet cutting, sheet fixing, heating, molding, demolding, and de-materializing. Among them, molding is a crucial part, in which the heated sheet is adsorbed on the mold by vacuum adsorption, and the molding is completed after cooling. An existing luggage molding process generally adopts the positive-mold blister molding. In the positive-mold blister molding, the appearance surface of the luggage housing is on the other side opposite to the molding surface of the mold, also with the thickness of the sheet, such that the positive-mold blister molding process is prone to indistinguishable problems of the lines, angles, etc. of the appearance surface. In addition, during the positive-mold blister molding, the grains and patterns, etc. on the luggage housing need to be set on the sheet, and the grains and patterns are deformed after the sheet is stretched, thus it is difficult to meet the design requirements. Furthermore, the sheet is first stretched into bubble shape when blistering, as shown in FIG. 1, the sheet is thick on both sides and thin in the middle. In the subsequent molding process, it is easy to appear as shown in FIG. 2 and FIG. 3, such as uneven thickness of the housing, the corners are too thin, etc., and the luggage therefore often fails the drop test.

[0003] A DE patent application No. 3010507A1 discloses a mold having a stamp with a stamp head with an effective surface that largely corresponds to the surface of the object to be shaped, in which a negative pressure which sucks in a plate to be deformed and presses this plate away or an excess pressure can be generated. The mold is also provided with a die that corresponds exactly in its effective surface as a negative to the outside of the object to be molded, in which a negative pressure can be generated, and also a holding frame for the plate to be clamped horizontally spread out at its edges, holding frame and stamp can be moved against each other in such a way that the plate can be placed over the stamp head and can be sucked in by a negative pressure generated in the stamp and can therefore be pre-stretched so that the stamp and mold can then be moved against one another until their outer edges come into contact. There remains a gap between the effective die surface and the plate, so that when the negative pressure in the mold is switched on and / or the negative pressure in the stamp is switched to positive pressure, the pre-stretched object can be brought into the mold by the stamp and finally with the flow lines created on the outside of the pre-stretched object being displaced or marks on the inside of the finished part can finally be deformed.

[0004] A US patent application No. 20160297126A1 discloses an in-mold decoration molding machine for performing resin molding in a state of disposing a film having a decoration layer on a surface thereof in a cavity of a molding die including a plurality of dies having at least a first die and a second die, and then transferring the decoration layer to a resin molded product, the in-mold decoration molding machine including: a first warm-air blowing circuit formed in the first die for blowing warm air into the cavity; a second warm-air blowing circuit formed in the second die for blowing warm air into the cavity; a first exhaust valve formed in the first die for discharging warm air from the first warm-air blowing circuit; and a second exhaust valve formed in the second die for discharging warm air from the second warm-air blowing circuit, wherein, when the molding die is fastened, warm air is blown to the cavity from the first warm-air blowing circuit and the second warm-air blowing circuit for heating the film, wherein, after the molding die is completely fastened, warm air continues to be blown from the second warm-air blowing circuit while warm air is discharged by the first exhaust valve from the first warm-air blowing circuit for stopping the blowing of the warm air into the cavity, and wherein, then, after warm air is discharged by the second exhaust valve from the second warm-air blowing circuit for stopping the blowing of the warm air into the cavity, and then the resin is injected.

[0005] A CN patent No. 218366097U discloses an injection mold which includes a female mold and a male mold, an injection molding cavity is formed in the first side of the female mold, and an injection molding protrusion corresponding to the injection molding cavity is arranged on the first side of the male mold; one of the second side, opposite to the first side, of the female die and the second side, opposite to the first side, of the male die is provided with a plurality of exhaust structures, and the exhaust structures communicate with the surface of the injection molding cavity or the surface of the injection molding protrusion.

[0006] An EP patent application No. 3819104A1 discloses a method for producing a case component, which is multiply curved at least in some sections, from a composite plastic panel by means of pressing. The method comprising the following steps: Providing a composite plastic panel, heating the composite plastic panel, receiving and pressing the heated composite plastic panel in a pressing device having pressing moulds having materials of different hardnesses, wherein at least in the region of the curves of the pressing surfaces of the pressing moulds, a softer material is provided that has a different thickness and / or a different hardness than a substantially flat region of the pressing surface, cooling the composite plastic panel received and pressed in the pressing device and opening the pressing device and removing the hardened composite plastic panel, which is multiply curved at least in some sections, from the pressing device as a component. The disclosure also relates to a case having at least one half-shell-shaped case component produced using such a method.

[0007] An JP patent application No. 402147317A discloses a method for molding a deep-draw container having a uniform thickness, wherein a plastic sheet is heated and hot air is subsequently blown to said sheet while the heated plastic sheet is molded from the opposite side by a mold to form a parison and air is blown in the parison from the mold and the circumference thereof to press the parison to the inner wall of a molding station. Specifically, a heated plastic sheet is grasped by the clamp parts of upper and lower stations and the station is hermetically closed. Heated air is blown to the plastic sheet from the blow-in port of the lower station and a parison mold is pressed to the surface of the plastic sheet on the side opposite to the air blow-in part while the plastic sheet is uniformly stretched to form a parison. The blowing of air from the blow-in port is stopped and heated air is supplied from the through-hole of the piston rod to be allowed to flow out from the apertures of the porous parison mold or the circumference of said mold. The parison is expanded and pressed to the inner wall of a molding chamber to be formed into a container shape. After cooling, the molded one is taken out and a flange part is removed to obtain a product container having a uniform thickness.SUMMARY OF THE DISCLOSURE

[0008] The present disclosure provides a negative mold for luggage molding, which aims to improve the existing problem that the appearance surface of the luggage is difficult to meet the design requirements and the uneven thickness of the luggage.

[0009] The invention is set out in the appended set of claims. The following solutions are adopted.

[0010] A negative-mold blister mold for molding a luggage, including: an upper mold assembly, including an upper mold holder and a convex mold adapted and connected to the upper mold holder; wherein the upper mold holder is arranged with a first airflow channel passing through the convex mold, and the convex mold is capable of being driven by a drive member; a lower mold assembly, including a lower mold holder, a concave mold, and a lifting platform for driving the concave mold to move; and a material frame, arranged on the lower mold holder to clamp a sheet, such that the sheet is suspended above the lower mold holder; wherein the convex mold and the concave mold are configured to switch between an adsorbed state and a mold detaching state; in the adsorbed state, the upper mold holder abuts against the material frame to define an upper air cavity above the sheet, the upper air cavity being in communication with the first airflow channel; air is blown downward through the first airflow channel to stretch the sheet, while each of the convex mold and the concave mold moves in a direction close to the sheet to define a molding space, such that the stretched sheet fits the concave mold under a gas pressure of the first airflow channel and is evenly distributed along the molding space under a pressure of the convex mold; in the mold detaching state, each of the convex mold and the concave mold moves toward in another direction away from the material frame to detach the molded sheet.

[0011] In some embodiments, the concave mold includes a molding surface extending downward, and a pressing surface on the convex mold is set shape-similarly to the molding surface; the molding space is defined between the molding surface and the pressing surface in the adsorbed state.

[0012] In some embodiments, the molding surface includes a grainy part and / or a glossy part.

[0013] In some embodiments, the lower mold holder is arranged with a second airflow channel; in the adsorbed state, a lower air cavity in communication with the second airflow channel is defined between the concave mold and the lifting platform, and air is blown downward through the second airflow channel; in the mold detaching state, air is blown upward through the second airflow channel.

[0014] In some embodiments, the first airflow channel is arranged along a middle of the convex mold.

[0015] In some embodiments, a plurality of waterways are arranged on the concave mold, and each waterway is laid out near a right angle of the concave mold.

[0016] A negative-mold blister molding method for a luggage, applied to the negative-mold blister mold as above and including: when absorbing: S1: fixing the sheet on the material frame, and moving the material frame to the lower mold holder after baking of the sheet is completed; S2: driving the upper mold holder to abut against the material frame; S3: blowing air downward through the first airflow channel to stretch the sheet into a bubble shape; S4: continuing to blow air through the first airflow channel, driving, by the lifting platform, the concave mold to move up, and sucking air through the second airflow channel disposed in the lower mold holder; and S5: lowering the convex mold to define the molding space with the concave mold, and fitting the sheet to the concave mold and molding the sheet with an assistance of the convex mold; when the mold is being detached: S6: driving, by the upper mold holder, the convex mold to rise simultaneously; and S7: lowering the concave mold and blowing air upward through the second airflow channel to release the formed sheet from the concave mold.

[0017] In some embodiments, when absorbing, the air in the first airflow channel diffuses outwardly and downwardly from a middle of the convex mold.

[0018] In some embodiments, an insert is placed on the concave mold before the absorbing, such that the insert is integrally molded with the sheet in the molding space.

[0019] A negative-mold blister molding method for a luggage, applied to the negative-mold blister mold as above and including: when absorbing: S1: placing an insert on the concave mold; S2: fixing the sheet on the material frame, and moving the material frame to the lower mold holder after baking of the sheet is completed; S3: driving the upper mold holder to abut against the material frame; S4: blowing air downward through the first airflow channel to stretch the sheet into a bubble shape; and S5: continuing to blow air through the first airflow channel, driving, by the lifting platform, the concave mold to move up, and sucking air through the second airflow channel disposed in the lower mold holder, such that the insert on the concave mold is molded integrally with the sheet; when the mold is being detached: S6: lowering the concave mold and blowing air upward through the second airflow channel to release the formed sheet from the concave mold.

[0020] By virtue of the above technical solutions, the present disclosure can achieve the following technical effects. 1. The sheet is molded by adsorption on the concave mold, which makes the appearance surface of the luggage housing fit the concave mold to ensure that the lines, grains, angles, etc. of the appearance surface meet the design requirements. By providing the convex mold on the upper mold holder, the convex mold is used to cooperate with the concave mold to define the molding space for sheet molding. During the molding state, a side of the sheet is attached to the concave mold and the other side is pressed by the convex mold, such that it is evenly distributed in the molding space, which makes the thickness of the luggage uniform, guarantees the strength of the luggage, reduces decorations such as corner guards, reduces the cost, and improve the market competition rate. 2. Most of the existing luggage blister molds are positive molds, when the sheet is required to be arranged with grain, and the sheet will be deformed to different degrees by stretching the grain, and it is also impossible to form local glossy surface or matte surface. In the present disclosure, the molding surface of the concave mold is provided with a grainy part and / or a glossy part, for example, a flat part of the molding surface is provided with a grain, and the raised or depressed part is provided with a shiny part or vice versa, without any specific limitation, so as to achieve partial graininess or shininess. By forming the grain on the molding surface of the concave mold, it can be guaranteed that the grain will not be deformed by the stretching of the sheet, ensuring a clear and beautiful grain. 3. An insert may be placed on the concave mold before adsorption, such that the insert is integrally molded with the sheet in the molding space, thereby reducing assembly. The insert may be a tie rod holder. When molding an upper housing of the luggage, the tie rod holder may not be placed, and when molding a lower housing of the luggage, the tie rod holder may be placed at a tie rod holder position, such that the insert and the lower housing are integrally molded, thereby realizing that the upper housing and the lower housing share the same mold. In addition, the tie rod holder and the lower housing are integrally molded, which can avoid the tie rod holder from exceeding the surface of the lower housing, and improve integrity of the whole luggage assembly and the surface quality of the whole luggage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the embodiments of the present disclosure, the following is a brief description of the accompanying drawings to be used in the embodiments. It should be understood that the following accompanying drawings show only certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope, and that other relevant accompanying drawings may be obtained by those skilled in the art without creative effort. FIG. 1 is a structural schematic view of a sheet when it is stretched. FIG. 2 is a structural schematic view of a stretched sheet being molded on a positive mold. FIG. 3 is a sheet after being molded in FIG. 2; FIG. 4 is a structural schematic view of an embodiment of the present disclosure in an adsorbed state. FIG. 5 is a structural schematic view of an embodiment of the present disclosure with an upper mold holder abutting against a material frame. FIG. 6 is a structural schematic view of a molded sheet according to an embodiment of the present disclosure. FIGS. 7 to 9 are structural schematic views of a housing. FIG. 10 is a structural schematic view of an embodiment of the present disclosure with an insert placed on a concave mold.

[0022] Reference numerals: 11-upper mold holder; 111-first airflow channel; 112-upper air cavity; 113- receiving plate; 12-convex mold; 21-lower mold holder; 211-second airflow channel; 212-lower air cavity; 22-concave mold; 221-waterway; 23-lifting platform; 31-material frame; 41-sheet; 411-glossy surface; 412-matte surface; 51-insert; 61-housing; 611-tie rod holder position; 612-placement slot. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present disclosure, and it is clear that the embodiments described are a part of the embodiments of the present disclosure, and not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without making creative labor fall within the scope of the present disclosure. Accordingly, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the present disclosure claimed for protection, but merely to indicate selected embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained without creative labor by those skilled in the art fall within the scope of the present disclosure.Embodiments

[0024] In combination with FIGS. 4 to 6, the present embodiments provide a negative mold for molding a luggage, including an upper mold assembly, a lower mold assembly, and a material frame 31. The upper mold assembly includes an upper mold holder 11 and a convex mold 12 adapted and connected to the upper mold holder 11, the upper mold holder 11 is arranged with a first airflow channel 111 passing through the convex mold 12, and the convex mold 12 is capable of being driven by a drive member configured on the upper mold holder 11. The lower mold assembly includes a lower mold holder 21, a concave mold 22, and a lifting platform 23 for driving the concave mold 22; the material frame 31 is arranged on the lower mold holder 21 to clamp a sheet 41 such that the sheet 41 is suspended above the lower mold holder 21; the convex mold 12 and the concave mold 22 are configured to switch between an adsorbed state and a mold detaching state; when in the adsorbed state, the upper mold holder 11 abuts against the material frame 31 to define an upper air cavity 112 above the sheet 41, the upper air cavity 112 being in communication with the first airflow channel 111, in which case air is blown downward through the first airflow channel 111 to stretch the sheet 41, while the convex mold 12 and the concave mold 22 move in the direction close to the sheet 41 to define a molding space, such that the stretched sheet 41 fits the concave mold 22 under a gas pressure of the first airflow channel 111, and is evenly distributed along the molding space under a pressure of the convex mold 12; when in the mold detaching state, each of the convex mold 12 and the concave mold 22 moves toward a position away from the material frame 31 to detach the molded sheet 41.

[0025] It should be noted that, in the embodiments, by arranging the convex mold 12 on the upper mold holder 11, the convex mold 12 is configured to cooperate with the concave mold 22 to define the molding space for the sheet 41 to be molded. During the molding state, a side of the sheet 41 is attached to the concave mold 22 and the other side is pressed by the convex mold 12, such that it is evenly distributed in the molding space, which makes the thickness of the luggage uniform, guarantees the strength of the luggage, reduces decorations such as corner guards, reduces the cost, and improve the market competition rate.

[0026] Specifically, the concave mold 22 includes a molding surface extending downward, and a pressing surface on the convex mold 12 is set shape-similarly to the molding surface. The molding space is defined between the molding surface and the pressing surface in the adsorbed state. In some embodiments, the molding surface includes a grainy part and / or a glossy part; for example, a flat part of the molding surface is set to be grainy and a raised or depressed part is set to be glossy for forming a matte surface 412 and a shiny surface 411; or conversely, the raised or depressed part is set to be grainy and the flat part is set to be glossy, without specific limitation, so as to achieve partial graininess or shininess. In addition, most of the existing luggage blister molds are positive molds; when a grain is to be formed, it is necessary to set the grain on the sheet, and the grain will be deformed to different degrees when the sheet is stretched, and it is impossible to form a partial glossy surface or matte surface. In the embodiments, by setting the grain on the molding surface of the concave mold 22, it may be ensured that the grain will not be deformed by the stretching of the sheet 41 and the grain will be clear and beautiful.

[0027] Based on the above embodiments, in some embodiments of the present disclosure, the lower mold holder 21 is arranged with a second airflow channel 211. When in the adsorbed state, a lower air cavity 212 in communication with the second airflow channel 211 is defined between the concave mold 22 and the lifting platform 23, in which case air is blown downward through the second airflow channel 211; when in the mold detaching state, air is blown upward through the second airflow channel 211. Both sides of the concave mold 22 and the lower mold holder 21 are fitted and limited in position to ensure that the concave mold 22 will not be shifted in the process of moving. It should be noted that in the embodiments, the first airflow channel 111 is connected to an upper air valve, specifically, the upper air valve may be connected to an air inlet on the convex mold 12 through a hose or spring tube; and the second airflow channel 211 is connected to a lower air valve. The control principle about the air valve is prior art, and it will not be repeated herein. The second airflow channel 211 assists in mold detaching or adsorption such that the sheet 41 may be evenly stressed and better fit to the concave mold 22 during the molding process.

[0028] In some embodiments, the drive member may be a cylinder, and the convex mold 12 is fixedly connected to a receiving plate 113 on the upper mold holder 11; the receiving plate 113 is driven by the cylinder to drive the convex mold 12 up or down, without specific limitation herein. In other embodiments, the drive member performs the driving function through other structures. In some embodiments, the first airflow channel 111 is arranged along the middle of the convex mold 12, which may be composed of multiple small air holes to avoid the impact of too large holes on the sheet 41 molding. Since the luggage is generally large in size, several waterways 221 may be arranged on the concave mold 22, and each waterway 221 is laid out near a right angle of the concave mold 22, such that the molded sheet 41 can be cooled quickly to speed up the production efficiency.

[0029] A negative-mold blister molding method for a luggage is further provided, applied to the negative mold as described above. The method includes the following operations.

[0030] When absorbing: S1: fixing the sheet 41 on the material frame 31 and suspending the sheet 41 above the lower mold holder 21, and moving the material frame 31 to the lower mold holder 21 after baking of the sheet 41 is completed. S2: heating the sheet 41 and driving the upper mold holder 11 to abut against the material frame 31 to define the upper air cavity 112 above the upper mold holder 11 and the sheet 41. S3: blowing air downward through the first airflow channel 111 to stretch the sheet 41 into a bubble shape. S4: continuing to blow air through the first airflow channel 111, driving, by the lifting platform 23, the concave mold 22 to move up, while sucking air through the second airflow channel 211 disposed in the lower mold holder 21, and pressurizing the sheet 41 on both sides to ensure a balanced force. S5: lowering the convex mold 12 to define the molding space with the concave mold 22, and fitting the sheet 41 to the concave mold 22 and molding the sheet 41 with the assistance of the convex mold 12;

[0031] When the mold is being detached: S6: driving, by the upper mold holder 11, the convex mold 12 to rise simultaneously. S7: lowering the concave mold 22 and blowing air upward through the second airflow channel 211 to release the formed sheet 41 from the concave mold 22.

[0032] It should be mentioned that during the adsorption, the air in the first airflow channel 111 diffuses outwardly and downwardly from the middle of the convex mold 12 to further guarantee the uniform force on the sheet 41.

[0033] In some embodiments, an insert 51 may be placed on the concave mold 22 before adsorption, such that the insert 51 is integrally molded with the sheet 41 in the molding space, thereby reducing assembly. The insert 51 may be a tie rod holder. Combined with FIG. 7, when molding an upper housing of the luggage, the tie rod holder may not be placed, and when molding a lower housing of the luggage, the tie rod holder may be placed at a tie rod holder position 611, such that the insert 51 and the lower housing are integrally molded, thereby realizing that the upper housing and the lower housing share the same mold. In addition, the tie rod holder and the lower housing are integrally molded, which can avoid the tie rod holder from exceeding the surface of the lower housing 61 and improve the surface quality. The insert 51 may also be a decorative ring, decorative strip, etc. Combined with FIGS. 8 and 9, in the existing housing 61 molding, when additional decorative parts are needed on the housing 61, a placement slot 612 is required to be machined on the housing 61 by later machining. While in the embodiments, combined with FIG. 10, the required decorative parts are only required to be placed on the molding surface of the concave mold 22 to be integrally molded with the sheet 41, thereby strengthening the housing 61 and beautifying the housing 61. In addition, the shape and position of the insert 51 are not fixed, allowing for a wider variety of appearance molding and improved versatility of the mold. In other embodiments, a metal foil may be placed on the concave mold 22 to achieve a hot stamping effect. A foil with a pattern may be placed on the concave mold 22 to achieve precise positioning of the pattern to be adsorbed onto the housing surface. In the existing housing blister molding, the pattern is printed on the surface of the sheet, and when the sheet is stretched and deformed, the printed pattern is deformed significantly. In the embodiments, the film pattern may be placed directly on the molding surface of the concave mold, and the film pattern is not stretched by adsorption, thereby ensuring that the pattern will not produce stretching deformation.

[0034] Another negative-mold blister molding method for a luggage is provided, including the following operations.

[0035] When absorbing: S1: placing the insert 51 on the concave mold 22. S2: fixing the sheet 41 on the material frame 31 and suspending the sheet 41 above the lower mold holder 21, and moving the material frame 31 to the lower mold holder 21 after baking of the sheet 41 is completed. S3: driving the upper mold holder 11 to abut against the material frame 31 to define the upper air cavity 112 above the upper mold holder 11 and the sheet 41. S4: blowing air downward through the first airflow channel 111 to stretch the sheet 41 into a bubble shape. S5: continuing to blow air through the first airflow channel 111, driving, by the lifting platform 23, the concave mold 22 to move up, while sucking air through the second airflow channel 211 disposed in the lower mold holder 21, and pressurizing the sheet 41 on both sides to ensure a balanced force, such that the insert 51 on the concave mold 22 is molded integrally with the sheet 41.

[0036] When the mold is being detached: S6: lowering the concave mold 22 and blowing air upward through the second airflow channel 211 to release the formed sheet 41 from the concave mold 22.

[0037] It should be noted that in the embodiments, the convex mold 12 may be controlled not to descend, and the convex mold 12 may be removed if necessary to facilitate the pick and place of the insert 51, as well as to avoid interference with the convex mold 12 when the thickness of the insert 51 is too large. The present disclosure makes no limitation in this regard.

Claims

1. A negative-mold blister mold for molding a luggage, comprising: an upper mold assembly, comprising an upper mold holder (11) and a convex mold (12) adapted and connected to the upper mold holder (11); wherein the upper mold holder (11) is arranged with a first airflow channel (111) passing through the convex mold (12), and the convex mold (12) is capable of being driven by a drive member; a lower mold assembly, comprising a lower mold holder (21), a concave mold (22), and a lifting platform (23) for driving the concave mold (22) to move; and a material frame (31), arranged on the lower mold holder (21) to clamp a sheet (41), such that the sheet (41) is suspended above the lower mold holder (21); wherein the convex mold (12) and the concave mold (22) are configured to switch between an adsorbed state and a mold detaching state; in the adsorbed state, the upper mold holder (11) is adapted to abut against the material frame (31) to define an upper air cavity (112) above the sheet (41), the upper air cavity (112) being in communication with the first airflow channel (111); wherein the the mold is adapted such that air is blown downward through the first airflow channel (111) to stretch the sheet (41), while each of the convex mold (12) and the concave mold (22) moves in a direction close to the sheet (41) to define a molding space, such that the stretched sheet (41) fits the concave mold (22) under a gas pressure of the first airflow channel (111) and is evenly distributed along the molding space under a pressure of the convex mold (12); and in the mold detaching state, each of the convex mold (12) and the concave mold (22) moves toward in another direction away from the material frame (31) to detach the molded sheet (41), the mold being characterized in that in the adsorbed state, the mold is adapted for blowing air downward through the first airflow channel (111) to stretch the sheet 41 into a bubble shape, and then continuing to blow air through the first airflow channel (111), driving, by the lifting platform (23), the concave mold (22) to move up, while sucking air through the second airflow channel (211) disposed in the lower mold holder (21), and pressurizing the sheet (41) on both sides to ensure a balanced force.

2. The negative-mold blister mold according to claim 1, wherein the concave mold (22) comprises a molding surface extending downward, and a pressing surface on the convex mold (12) is set shape-similarly to the molding surface; the molding space is defined between the molding surface and the pressing surface in the adsorbed state.

3. The negative-mold blister mold according to claim 2, wherein the molding surface comprises a grainy part and / or a glossy part.

4. The negative-mold blister mold according to claim 1, wherein the lower mold holder (21) is arranged with a second airflow channel (211); in the adsorbed state, a lower air cavity (212) in communication with the second airflow channel (211) is defined between the concave mold (22) and the lifting platform (23), and air is blown downward through the second airflow channel (211); in the mold detaching state, air is blown upward through the second airflow channel (211).

5. The negative-mold blister mold according to claim 1, wherein the first airflow channel (111) is arranged along a middle of the convex mold (12).

6. The negative-mold blister mold according to claim 1, wherein a plurality of waterways (221) are arranged on the concave mold (22), and each waterway (221) is laid out near a right angle of the concave mold (22).

7. A negative-mold blister molding method for a luggage, applied to the negative-mold blister mold according to claim 4 and comprising: when absorbing: S1: fixing the sheet (41) on the material frame (31), and moving the material frame (31) to the lower mold holder (21) after baking of the sheet (41) is completed; S2: driving the upper mold holder (11) to abut against the material frame (31); S3: blowing air downward through the first airflow channel (111) to stretch the sheet (41) into a bubble shape; S4: continuing to blow air through the first airflow channel (111), driving, by the lifting platform (23), the concave mold (22) to move up, and sucking air through the second airflow channel (211) disposed in the lower mold holder (21); and S5: lowering the convex mold (12) to define the molding space with the concave mold (22), and fitting the sheet (41) to the concave mold (22) and molding the sheet (41) with an assistance of the convex mold (12); when the mold is being detached: S6: driving, by the upper mold holder (11), the convex mold (12) to rise simultaneously; and S7: lowering the concave mold (22) and blowing air upward through the second airflow channel (211) to release the formed sheet (41) from the concave mold (22).

8. The method according to claim 7, wherein when absorbing, the air in the first airflow channel (111) diffuses outwardly and downwardly from a middle of the convex mold (12).

9. The method according to claim 7, wherein an insert (51) is placed on the concave mold (22) before the absorbing, such that the insert (51) is integrally molded with the sheet (41) in the molding space.

10. A negative-mold blister molding method for a luggage, applied to the negative-mold blister mold according to claim 4 and comprising: when absorbing: S1: placing an insert (51) on the concave mold (22); S2: fixing the sheet (41) on the material frame (31), and moving the material frame (31) to the lower mold holder (21) after baking of the sheet (41) is completed; S3: driving the upper mold holder (11) to abut against the material frame (31); S4: blowing air downward through the first airflow channel (111) to stretch the sheet (41) into a bubble shape; and S5: continuing to blow air through the first airflow channel (111), driving, by the lifting platform (23), the concave mold (22) to move up, and sucking air through the second airflow channel (211) disposed in the lower mold holder (21), such that the insert (51) on the concave mold (22) is molded integrally with the sheet (41); when the mold is being detached: S6: lowering the concave mold (22) and blowing air upward through the second airflow channel (211) to release the formed sheet (41) from the concave mold (22).