Multi-color box shell one-time forming method and multi-color raw sheet preparation device

Abstract

The invention relates to the field of bags and suitcases, in particular to a multi-color box shell one-time forming method and a multi-color raw sheet preparation device, and the forming method comprises the steps of multi-color raw sheet preparation, plastic uptake forming and the like. When the multi-color raw sheet is prepared, separation is performed in the same mold cavity, molten materials with different colors are synchronously injected into different separation cavities, then gaps formed when separation pieces are pulled out are synchronously filled with materials to form connection areas, and the connection areas and the separation pieces are formed together; the multi-color raw sheet preparation device comprises a forming die provided with a forming cavity and a separating and gap filling assembly provided with a sliding blocking strip with a connecting material runner, the sliding blocking strip can be inserted into the forming cavity to separate the forming cavity, and separation can be removed after the sliding blocking strip is pulled outwards. And molten materials can be filled in a gap formed when the joining material runner pair is pulled outwards. According to the invention, after molten materials with different colors are synchronously injected, color crossing between the molten materials can be avoided, one-time forming can be realized, the manufacturing procedures of a multi-color box shell can be reduced, the manufacturing cost can be reduced, and the overall attractiveness of the luggage case can be improved.

Description

Technical Field

[0001] The present invention relates to the field of luggage, and particularly to a method for one - step forming of a multi - colored case shell and a device for preparing multi - colored original sheets. Background Art

[0002] Nowadays, with the continuous improvement of the quality of life, people's pursuit of fashion and personalization has become more and more distinct. The fashion and personalization of luggage are also the current mainstream trends, and multi - colored luggage is more popular among young people. At present, most multi - colored luggage is made by printing with different colors or using multiple different - colored luggage material sheets to make the case shell respectively and then stitching or adhesively splicing them. However, for both printed or spliced multi - colored luggage, the manufacturing process is generally more complex, the cost is high, the precision is difficult to control, and it also affects the overall aesthetics. Therefore, people hope that the multi - colored case shell for making multi - colored luggage can be formed in one step, without using different - colored material sheets for splicing or printing to reduce the manufacturing process, reduce the cost, and improve the overall aesthetics of the luggage. In view of this, this case is thus generated. Summary of the Invention

[0003] To overcome the deficiencies in the prior art, the method for one - step forming of a multi - colored case shell disclosed in the present invention includes steps such as preparing multi - colored original sheets for the case shell and vacuum thermoforming. When preparing multi - colored original sheets, different compartments are first separated by a separator in the same cavity, and different - colored molten materials are simultaneously injected into different compartments. Then, the separator is slowly withdrawn, and new molten material is simultaneously injected into the gap formed when the separator is withdrawn to form a connection area and be formed together, so as to avoid the appearance impact caused by the mutual color bleeding between different - colored molten materials; the multi - colored original sheet preparation device used for preparing multi - colored original sheets includes a forming die with a forming cavity having an open end at one end and a partition and filling - seam assembly provided with a sliding bar having a connecting material flow channel. The forming die is also provided with a plurality of different - colored material flow channels and a square slideway. The sliding bar can be slidably inserted into the forming cavity of the forming die to separate the forming cavity. After the sliding bar is withdrawn outward, the separation of the forming cavity can be released, and molten material can be filled into the gap formed when the sliding bar is withdrawn outward through the connecting material flow channel. The present invention uses the method of separating and simultaneously injecting slurry, then withdrawing the partition and simultaneously filling the seam, and then forming together, and the multi - colored original sheet preparation device, so that different - colored molten materials can avoid color bleeding after being simultaneously injected, and then a multi - colored original sheet that can be formed in one step and has distinct colors can be formed; then, the multi - colored case shell is made by vacuum thermoforming, so as to meet the demand that people hope the multi - colored case shell for making multi - colored luggage can be formed in one step, reduce the manufacturing process of the multi - colored case shell, reduce the manufacturing cost, and improve the overall aesthetics of the luggage.

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A method for one - step forming of a multi - colored case shell, which is used to prepare a one - step - formed multi - colored case shell for a luggage, is characterized in that it includes the following steps:

[0006] Step 1: Prepare the multi-color original sheet of the box shell; it includes the following steps:

[0007] Sub-step s1: In different compartments of the same mold cavity equipped with a retractable partition, inject molten materials of different colors separately and synchronously.

[0008] Sub-step s2: Slowly draw out the partition outward, and synchronously inject molten material of the same color or a different color as any of the colors in sub-step s1 into the gap formed when drawing out the partition, so that it is respectively connected with the molten materials of different colors injected in sub-step s1 to form a connection area between the molten materials of different colors in sub-step s1.

[0009] Sub-step s3: Cool and shape, using strong cooling liquid to make it quickly take shape.

[0010] Sub-step s4: Discharge the material and trim the edges.

[0011] Step 2: Blister molding, fix the multi-color original sheet on a vacuum molding machine, and use the blistering method to make a multi-color box shell for the upper box body or the lower box body of the multi-color suitcase in one molding.

[0012] A multi-color original sheet preparation device, which is used to prepare the multi-color original sheet described in step 1 of claim 1, includes a first injection group, a second injection group, and a third injection group. The first injection group, the second injection group, and the third injection group are injection units of an injection molding machine. It is characterized in that: it further includes a molding die and a partition and filling gap assembly. The molding die is a cavity member with a flat-shaped molding cavity inside. The partition and filling gap assembly is provided with a sliding bar with a through hole, which can be slidably inserted into the molding cavity of the molding die to divide the molding cavity. After the sliding bar is drawn out outward, the division of the molding cavity can be released, and molten material can be filled into the gap formed when drawing out outward through the through hole in the sliding bar.

[0013] One end of the molding cavity of the molding die is set to be open. The molding die is provided with a first color material flow channel, a second color material flow channel, and a square slideway at the other end far from the open end. The first color material flow channel, the second color material flow channel, and the square slideway are all through holes and are communicated with the molding cavity. The square slideway is arranged between the first color material flow channel and the second color material flow channel. The discharging ends of the first injection group and the second injection group are respectively communicated with the feeding ends of the first color material flow channel and the second color material flow channel.

[0014] The inner wall of the peripheral wall of the molding die is provided with a serpentine cooling liquid circulation channel, and both ends of the cooling liquid circulation channel can be communicated with an external cold liquid source.

[0015] The sliding strip is a hollow square long strip member with a square-shaped cross-section in the shape of a Chinese character "hui", its outer surface is a smooth surface, a connecting material flow channel penetrating through from front to back is provided in the middle, the discharging end of the third injection group is communicated with the feeding end of the connecting material flow channel, the partition and caulking assembly is further provided with an electric heating element, the electric heating element is embedded and fixedly connected in the peripheral wall of the sliding strip, and the electric heating element is preferably an electric heating wire.

[0016] The sliding strip matches with the square slideway of the forming die and is in sliding fit therewith, and the sliding strip is slidably inserted into the square slideway.

[0017] The partition and caulking assembly further includes ear plates, sliding sleeves and screw sleeves. There are two ear plates, and the two ear plates are respectively fixedly connected to the left and right sides at the rear end of the sliding strip. The sliding sleeves and screw sleeves are respectively embedded and fixedly connected to the two ear plates.

[0018] The multi-color original sheet preparation device further includes a sliding drive assembly. The sliding drive assembly includes a support frame, a sliding rod, a screw rod, a reduction motor and a linear module. The sliding rod, the screw rod and the linear module are parallel to each other and are all parallel to the sliding strip. The sliding rod is slidably inserted into the sliding sleeve of the partition and caulking assembly to form a pair of sliding guide pairs. The screw rod is screwed into the screw sleeve to form a pair of screw drive pairs for driving the sliding strip to move linearly. Both ends of the sliding rod are fixedly connected to the support frame by support seats. Both ends of the screw rod are rotatably connected to the support frame by bearing seats. The output shaft of the reduction motor is connected to one end of the screw rod, and the reduction motor is fixedly connected to the support frame. The linear module is one or several pieces, and the linear module is fixedly connected to the support frame. The third injection group is fixedly connected to the slider of the linear module itself. The linear module can drive the third injection group to move linearly. The first injection group, the second injection group and the forming die are all fixedly connected to the support frame.

[0019] The reduction motor and the drive motor of the linear module are both servo motors, and the third injection group on the linear module and the sliding strip can move linearly synchronously.

[0020] The multi-color original sheet preparation device further includes a baffle assembly. The baffle assembly is provided with a baffle. The baffle is pivotally connected to the forming die and is placed at the open end of the forming die. The baffle can be flipped and can block or release the blocking of the material in the forming cavity of the forming die from sliding out through the open end.

[0021] The described baffle assembly is further provided with a rotating shaft, a rotating sleeve, and a rotating cylinder. The rotating shaft is matched with the rotating sleeve, and the rotating shaft can be inserted into the rotating sleeve and rotate. The rotating sleeve is one or several pieces, and the rotating sleeve is fixedly connected to the outer side of the open end of the forming mold. One side edge of the baffle is fixedly connected to the rotating shaft. Both ends of the rotating shaft are rotatably connected to the support frame by bearing seats. The cylinder rod of the rotating cylinder is connected to one end of the rotating shaft, and the rotating cylinder can drive the rotating shaft to drive the baffle to flip. The rotating cylinder is fixedly connected to the support frame.

[0022] As can be seen from the above description, the advantages of the multi-color box shell one-time forming method and the multi-color original sheet preparation device provided by the present invention are as follows: The method includes steps such as preparing the multi-color original sheet of the box shell and vacuum forming. When preparing the multi-color original sheet, different compartments are first separated by a separator in the same mold cavity, and different colored molten materials are synchronously injected into different compartments. Then, the separator is slowly withdrawn, and new molten material is synchronously injected into the gap formed when the separator is withdrawn to form a connection area and be formed together. The multi-color original sheet preparation device used for preparing the multi-color original sheet includes a forming mold with a forming cavity having an open end at one end and a partition and filling gap assembly provided with a sliding baffle strip with a connecting material flow channel. The sliding baffle strip can be slidably inserted into the forming cavity of the forming mold to separate the forming cavity. After the sliding baffle strip is withdrawn outward, the separation of the forming cavity can be released, and molten material can be filled into the gap formed when the sliding baffle strip is withdrawn outward through the connecting material flow channel. The present invention uses the method of separating and synchronously injecting slurry, then withdrawing the partition and synchronously filling the gap, and then forming together, and the multi-color original sheet preparation device, so that different colored molten materials can avoid color mixing after being synchronously injected, and thus a multi-color original sheet that can be formed at one time and has distinct colors can be formed. Then, the multi-color box shell is made by vacuum forming, which can meet the demand that people hope the multi-color box shell for making a multi-color box body can be formed at one time, can reduce the manufacturing process of the multi-color box shell, can reduce the manufacturing cost, and can improve the overall aesthetics of the luggage. The present invention has a reasonable design, a simple structure, a low cost, and is convenient for popularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a top view of the multi-color original sheet preparation device;

[0024] Figure 2 is Figure 1 the enlarged schematic view of A-A in

[0025] Figure 3 It is an enlarged schematic view of the forming mold;

[0026] Figure 4 is Figure 3 the enlarged schematic view of B-B in

[0027] Figure 5 It is an enlarged schematic view of the partition and filling gap assembly;

[0028] Figure 6is Figure 5 Schematic enlarged view of C-C in

[0029] Figure 7 Schematic view of the sliding drive assembly;

[0030] Figure 8 Schematic view of the separation of the forming cavity of the forming die being released after the sliding strip is pulled outwards;

[0031] Figure 9 Front schematic view of the multi-color box shell of the present invention, and the box shell is provided with convex ribs and grooves;

[0032] Figure 10 is Figure 9 Schematic view after partial section in the D direction in

[0033] Figure 11 Schematic view of the multi-color original sheet.

[0034] Reference numerals:

[0035] 1 First injection group; 2 Second injection group; 3 Third injection group; 4 Forming die; 41 First colorant flow channel; 42 Second colorant flow channel; 43 Square slideway; 44 Forming cavity; 45 Cooling liquid circulation channel; 5 Partition and caulking assembly; 51 Sliding strip; 511 Connecting material flow channel; 52 Ear plate; 53 Sleeve; 54 Nut sleeve; 55 Electric heating element; 6 Sliding drive assembly; 61 Support frame; 62 Slide bar; 63 Screw; 64 Reduction motor; 65 Linear module; 7 Baffle assembly; 71 Baffle; 72 Rotating shaft; 73 Rotating sleeve; 74 Rotary cylinder; P1 First color area; P2 Second color area; P3 Connecting color area; 900 Multi-color original sheet. Detailed implementation manners

[0036] The present invention will be further described below through specific implementation manners.

[0037] As Figure 1 , Figure 8 and Figures 9 to 11 shown, a multi-color original sheet preparation device of the present invention is used to prepare the multi-color original sheet 900 required for the one-time forming of a multi-color box shell of a luggage case. The multi-color original sheet 900 of this embodiment includes a first color area P1, a second color area P2, and a connecting color area P3. The preparation device includes a first injection group 1, a second injection group 2, a third injection group 3, a forming die 4, a partition and caulking assembly 5, a sliding drive assembly 6, and a baffle assembly 7. The first injection group 1, the second injection group 2, and the third injection group 3 are injection units of an injection molding machine, which are well-known technologies.

[0038] As Figure 1 and Figure 8As shown in the figure, the forming die 4 of the present invention is a cavity member with a flat forming cavity 44 inside. The partition and caulking assembly 5 is provided with a sliding bar 51 with a through hole, which can be slidably inserted into the forming cavity 44 of the forming die 4 to partition the forming cavity 44. After the sliding bar 51 is pulled outwards, the partition of the forming cavity 44 can be released, and the molten material can be injected into the gap formed when pulled outwards through the through hole in the sliding bar 51.

[0039] As Figure 1 , Figure 3 and Figure 4 As shown in the figure, one end of the forming cavity 44 of the forming die 4 of the present invention is an open end, and the other end of the forming die 4 far from the open end is provided with a first colorant flow channel 41, a second colorant flow channel 42 and a square slideway 43. The first colorant flow channel 41, the second colorant flow channel 42 and the square slideway 43 are all through holes and are communicated with the forming cavity 44. The square slideway 43 is arranged between the first colorant flow channel 41 and the second colorant flow channel 42. The discharging ends of the first injection group 1 and the second injection group 2 are respectively communicated with the feeding ends of the first colorant flow channel 41 and the second colorant flow channel 42. A serpentine cooling liquid circulation channel 45 is arranged inside the peripheral wall of the forming die 4, and both ends of the cooling liquid circulation channel 45 can be communicated with an external cold liquid source.

[0040] As Figures 1 to 6 As shown in the figure, the partition and caulking assembly 5 of the present invention includes a sliding bar 51, ear plates 52, sliding sleeves 53, screw sleeves 54 and an electric heating element 55. The sliding bar 51 is a hollow square long bar member with a cross-section in the shape of a Chinese character 'hui', its outer surface is a smooth surface, and a connecting material flow channel 511 penetrating through the front and back is arranged in the middle. The discharging end of the third injection group 3 is communicated with the feeding end of the connecting material flow channel 511. The electric heating element 55 is embedded and fixed in the peripheral wall of the sliding bar 51. The electric heating element 55 in this embodiment is an electric heating wire. The sliding bar 51 is matched with the square slideway 43 of the forming die 4 and is slidably engaged with each other. The sliding bar 51 is slidably inserted into the square slideway 43. There are two ear plates 52, and the two ear plates 52 are respectively fixed on the left and right sides at the rear end of the sliding bar 51. The sliding sleeves 53 and the screw sleeves 54 are respectively embedded and fixed on the two ear plates 52.

[0041] As Figures 1 to 7As shown in the figure, the sliding drive assembly 6 of the present invention includes a support frame 61, a slide bar 62, a screw rod 63, a reduction motor 64, and a linear module 65. The slide bar 62, the screw rod 63, and the linear module 65 are parallel to each other and are all parallel to the sliding strip 51. The slide bar 62 is slidably inserted into the slide sleeve 53 of the partition caulking assembly 5 to form a pair of sliding guide pairs. The screw rod 63 is screwed into the screw sleeve 54 to form a pair of threaded transmission pairs for driving the sliding strip 51 to move linearly. Both ends of the slide bar 62 are fixedly connected to the support frame 61 by support seats. Both ends of the screw rod 63 are rotatably connected to the support frame 61 by bearing seats. The output shaft of the reduction motor 64 is connected to one end of the screw rod 63, and the reduction motor 64 is fixedly connected to the support frame 61. The linear module 65 is one or several pieces, and the linear module 65 is fixedly connected to the support frame 61. The third injection group 3 is fixedly connected to the slider of the linear module 65 itself. The linear module 65 can drive the third injection group 3 to move linearly. The linear module is a well-known technology. The linear module used in this embodiment is a ball screw type linear module. The first injection group 1, the second injection group 2, and the molding die 4 are all fixedly connected to the support frame 61. The drive motors of the reduction motor 64 and the linear module 65 are both servo motors. The third injection group 3 on the linear module 65 and the sliding strip 51 can move linearly synchronously.

[0042] As Figure 1 and Figure 2 shown in the figure, the baffle assembly 7 of the present invention is provided with a baffle 71, a rotating shaft 72, a rotating sleeve 73, and a rotating cylinder 74. The baffle 71 is pivotally connected to the molding die 4 and is placed at the open end of the molding die 4. The baffle 71 can be flipped and can block or release the blocking of the material in the molding cavity 44 of the molding die 4 from sliding out through the open end. The rotating shaft 72 matches the rotating sleeve 73. The rotating shaft 72 can be inserted into the rotating sleeve 73 and can rotate. The rotating sleeve 73 is one or several pieces, and the rotating sleeve 73 is fixedly connected to the outside of the open end of the molding die 4. One side edge of the baffle 71 is fixedly connected to the rotating shaft 72. Both ends of the rotating shaft 72 are rotatably connected to the support frame 61 by bearing seats. The cylinder rod of the rotating cylinder 74 is connected to one end of the rotating shaft 72. The rotating cylinder 74 can drive the rotating shaft 72 to drive the baffle 71 to flip. The rotating cylinder 74 is fixedly connected to the support frame 61.

[0043] The multi-color box shell one-time molding method of the present invention is used to prepare a one-time molded multi-color box shell for a luggage case. The multi-color box shell in this embodiment includes a first color area P1, a second color area P2, and a connecting color area P3. This molding method mainly includes the following steps:

[0044] Step 1: Use the multi-color original sheet preparation device of the present invention to first prepare the multi-color original sheet 900 required for the multi-color box shell. The specific method is:

[0045] The rotary cylinder 74 of the baffle assembly 7 is started to drive the baffle 71 to flip so that the baffle 71 seals the opening of the molding cavity 44 of the molding die 4; the reduction motor 64 of the sliding drive assembly 6 and the driving motor of the linear module 65 are started to drive the sliding bar 51 of the partition and gap filling assembly 5 and the third injection group 3 on the linear module 65 to move linearly toward the opening direction of the molding cavity 44 synchronously and abut against the baffle 71, so that the same molding cavity 44 is temporarily divided into two different compartments by the sliding bar 51; at the same time, the inner portion of the sliding bar 51 is opened. The electric heating element 55 preheats the sliding bar 51; the first injection group 1 and the second injection group 2 are then used to synchronously and respectively inject the molten material of the first color and the molten material of the second color used to prepare the multi-color original sheet 900 from the first color material flow channel 41 and the second color material flow channel 42 of the molding die 4 into different compartments of the molding cavity 44. The materials used to prepare the multi-color original sheet 900 can be melted PC or ABS or PP materials of different colors, but the material and physical and chemical properties of each batch of materials must be the same.

[0046] Before the injected molten material solidifies, the reduction motor 64 of the sliding drive assembly 6 and the driving motor of the linear module 65 are started to drive the sliding bar 51 and the third injection group 3 to be synchronously and slowly withdrawn outward; at the same time, the third injection group 3 is started, and during the withdrawal of the sliding bar 51, the molten material for connection is synchronously injected through the connecting material flow channel 511 of the sliding bar 51 into the gap formed when the sliding bar 51 is withdrawn to connect the three to become one. After the sliding bar 51 is withdrawn from the molding cavity 44, the electric heating element 55 and the third injection group 3 are turned off.

[0047] The cooling liquid source connected to the outside of the cooling liquid circulation channel 45 of the forming mold 4 is turned on to strongly cool the molten material in the forming mold 4 and the forming cavity 44 so that it can be quickly formed.

[0048] Start the rotating cylinder 74 of the baffle assembly 7 to drive the baffle 71 to flip in the opposite direction to release the blockage of the opening of the molding cavity 44 of the molding die 4; then use the sliding bar 51 to push forward to push the molded multi-color original sheet 900 out of the molding cavity 44; after trimming, the multi-color original sheet 900 having the first color area P1, the second color area P2 and the connecting color area P3 can be molded at one time.

[0049] Step 2 is to perform vacuum forming, fix the multi-color original sheet 900 on a vacuum forming machine, and use the vacuum forming method to form a multi-color case shell having a first color area P1, a second color area P2, and a connecting color area P3 as an upper or lower case of a multi-color suitcase. During the vacuum forming process, the case wall can be made into a flat surface or a convex or concave surface as required. Figure 9 and attached Figure 10 The surface is convex and concave, and the blister method is a well-known technology.

[0050] The method for one - step forming of a multi - colored box shell according to the present invention includes steps such as preparing a multi - colored original sheet 900 of the box shell and vacuum thermoforming. When preparing the multi - colored original sheet 900, in the same mold cavity, it is first separated into different compartments by a separator, and different colored molten materials are simultaneously injected into different compartments. Then, the separator is slowly withdrawn, and new molten material is simultaneously injected into the gap formed when the separator is withdrawn to form a connection area and they are formed together. The multi - colored original sheet preparation device used for preparing the multi - colored original sheet 900 includes a forming mold 4 provided with a forming cavity 44 with an open end at one end and a partition and filling - gap assembly 5 provided with a sliding bar 51 with a connecting material flow channel 511. The sliding bar 51 can be slidably inserted into the forming cavity 44 of the forming mold 4 to separate the forming cavity 44. After the sliding bar 51 is withdrawn outward, the separation of the forming cavity 44 can be released, and molten material can be filled into the gap formed when the sliding bar 51 is withdrawn outward through the connecting material flow channel 511. The present invention uses the method of separating and simultaneously injecting slurry, then withdrawing the partition and simultaneously filling the gap, and then forming together, and the multi - colored original sheet preparation device, so that different colored molten materials can avoid color bleeding when injected simultaneously, and then a multi - colored original sheet 900 with distinct colors can be formed in one - step forming. Then, the multi - colored box shell is made by vacuum thermoforming, which can meet the demand that people hope the multi - colored box shell for making a multi - colored box body can be formed in one - step, reduce the manufacturing process of the multi - colored box shell, reduce the manufacturing cost, and improve the overall aesthetics of the luggage.

[0051] The above is only a specific embodiment of the present invention, but the design concept of the present invention is not limited thereto. Any non - substantial modification of the present invention using this concept shall fall within the scope of infringement of the protection scope of the present invention.

Claims

1. Method for one - time forming of multi - color box shell, this method is used for preparing the multi - color box shell formed in one time of a luggage case, and is characterized in that: It includes the following steps: Step 1: Prepare the multi-color original sheet (900) of the box shell; it includes the following sub-steps: Sub-step s1: Inject different colors of molten materials separately and synchronously into different compartments of the same mold cavity provided with a retractable partition; Sub-step s2: Slowly draw out the partition outward, and synchronously inject molten materials of the same color or different colors as any one of the colors in sub-step s1 into the gap formed when the partition is drawn out, so that they are respectively connected with the molten materials of different colors injected in sub-step s1 to form a connection area between the molten materials of different colors in sub-step s1; Sub-step s3: Cool and shape, and use strong cooling liquid to make it quickly formed; Sub-step s4: Discharge and trim the edges; Step 2: Blister molding, fix the multi-color original sheet (900) on a vacuum molding machine, and use the blistering method to make a one-time formed multi-color box shell of the upper box body or the lower box body of the multi-color suitcase.

2. A multi-color original sheet preparation device, which is used to prepare the multi-color original sheet (900) described in step 1 of claim 1, and includes a first injection group (1), a second injection group (2) and a third injection group (3). The first injection group (1), the second injection group (2) and the third injection group (3) are injection units of an injection molding machine, and are characterized in that: It also includes a molding die (4) and a partition and caulking assembly (5). The molding die (4) is a cavity member with a flat molding cavity (44) inside. The partition and caulking assembly (5) is provided with a sliding bar (51) with a through hole, which can be slidably inserted into the molding cavity (44) of the molding die (4) to separate the molding cavity (44). After the sliding bar (51) is drawn out outward, the separation of the molding cavity (44) can be released, and molten materials can be injected into the gap formed when drawn out outward through the through hole in the sliding bar (51).

3. The multi-color original sheet preparation device according to claim 2, wherein: One end of the molding cavity (44) of the molding die (4) is set to be open. The molding die (4) is provided with a first color material flow channel (41), a second color material flow channel (42) and a square slideway (43) at the other end far from the open end. The first color material flow channel (41), the second color material flow channel (42) and the square slideway (43) are all through holes and communicate with the molding cavity (44). The square slideway (43) is arranged between the first color material flow channel (41) and the second color material flow channel (42). The discharging ends of the first injection group (1) and the second injection group (2) are respectively communicated with the feeding ends of the first color material flow channel (41) and the second color material flow channel (42).

4. The multi-color original sheet preparation device according to claim 3, characterized in that: A snake-shaped coolant circulation channel (45) is arranged inside the peripheral wall of the molding die (4).

5. The multi-color original sheet preparation device according to claim 3, characterized in that: The sliding bar (51) is a hollow square long bar member, and a connecting material flow channel (511) is provided in the middle of it, which penetrates through from front to back. The discharging end of the third injection group (3) is communicated with the feeding end of the connecting material flow channel (511). The partition and caulking assembly (5) is also provided with an electric heating element (55), and the electric heating element (55) is embedded and fixed in the peripheral wall of the sliding bar (51).

6. The multi-color original sheet preparation device according to claim 5, characterized in that: The sliding bar (51) matches the square slideway (43) of the molding die (4), and the sliding bar (51) is slidably inserted into the square slideway (43).

7. A multi-color original sheet preparation device according to claim 6, characterized in that: The partition and caulking assembly (5) also includes ear plates (52), sliding sleeves (53) and screw sleeves (54). There are two ear plates (52), and the two ear plates (52) are respectively fixed on the left and right sides of the sliding bar (51). The sliding sleeves (53) and the screw sleeves (54) are respectively embedded and fixed on the two ear plates (52).

8. A multi-color original sheet preparation device according to claim 7, characterized in that: It further includes a sliding drive assembly (6). The sliding drive assembly (6) includes a support frame (61), a sliding rod (62), a screw rod (63), a reduction motor (64) and a linear module (65). The sliding rod (62), the screw rod (63) and the linear module (65) are parallel to each other and are all parallel to the sliding strip (51). The sliding rod (62) is slidably inserted into the sliding sleeve (53) of the partition caulking assembly (5). The screw rod (63) is screwed into the screw sleeve (54). Both ends of the sliding rod (62) are fixedly connected to the support frame (61). Both ends of the screw rod (63) are rotatably connected to the support frame (61). The output shaft of the reduction motor (64) is connected to one end of the screw rod (63). The linear module (65) is one or several pieces, and the linear module (65) is fixedly connected to the support frame (61). The third injection group (3) is fixedly connected to the linear module (65). The first injection group (1), the second injection group (2) and the molding die (4) are all fixedly connected to the support frame (61).

9. A multi-color original sheet preparation device according to claim 8, characterized in that: The drive motors of the reduction motor (64) and the linear module (65) are both servo motors. The third injection group (3) on the linear module (65) can linearly move synchronously with the sliding strip (51).

10. A multi-color original sheet preparation device according to claim 9, characterized in that: It further includes a baffle assembly (7). The baffle assembly (7) is provided with a baffle (71). The baffle (71) is pivotally connected to the molding die (4) and is placed at the open end of the molding die (4). The baffle (71) can be flipped and can block or release the blocking of the material in the molding cavity (44) of the molding die (4) from sliding out through the open end.

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