Hot melting jig

Abstract

The utility model discloses a hot melting jig which comprises an upper die and a lower die, the upper die comprises an upper heating piece and an upper pressing block, the upper pressing block abuts against the upper heating piece, the lower die comprises a lower heating piece and a lower pressing block, and the lower pressing block abuts against the lower heating piece; the upper pressing block is provided with a convex part, the lower pressing block is provided with a concave part, and the convex part and the concave part are matched to fix the flexible woven belt; the upper heating piece is provided with an upper profiling groove, the lower heating piece is provided with a lower profiling groove, the upper profiling groove and the lower profiling groove are oppositely arranged, the lower pressing block is provided with a glue blocking wall, and the highest position of the glue blocking wall is higher than the lowest position of the lower profiling groove. According to the hot melting jig, the PC sheet can be fused to the flexible woven belt, so that the structural property of the flexible woven belt is changed within a small range, and PC liquid after hot melting is prevented from overflowing due to gravity.

Description

Technical Field

[0001] The utility model relates to the technical field of watch strap processing, in particular to a hot-melt fixture. Background Art

[0002] The current sports goods market is rapidly gaining popularity. To meet the needs of sports people for lightness, simplicity, comfort and beauty, woven watch straps have emerged. Woven watch straps have strong elasticity and tensile strength, and their average weight is less than half of that of ordinary leather. They are not only comfortable to wear, but also low-carbon and environmentally friendly. The assembly of the two ends of the flexible woven strap with the connector determines the performance and strength of the strap to a certain extent.

[0003] In the prior art, the connectors at both ends of the silicone rubber braided rope are made of metal parts inside, and then assembled with the lugs. In order to make the two ends of the braided belt have the hardness and rigidity requirements for assembly and connection with the connector, PC (polycarbonate, also known as PC plastic) sheets are fused at both ends of the braided belt. When the existing hot melt jig fuses the PC sheet to the braided belt, it needs to reach a certain temperature to completely melt it. However, the melting temperature of the PC sheet is relatively high, and the relative temperature of the jig is even higher, which may burn the surface of the surrounding braided belt. In addition, the PC sheet becomes liquid after melting, which is easy to overflow due to gravity, thus affecting the fusion effect.

[0004] Therefore, it is necessary to provide a new hot melt fixture to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a hot-melt jig which can fuse a PC sheet to a flexible braided belt without easily scalding the braided belt and has a good fusion effect.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A hot melt jig, suitable for fusing a PC sheet to a flexible braided belt, comprising an upper mold and a lower mold, wherein the upper mold comprises an upper heating element and an upper pressing block, wherein the upper pressing block abuts against the upper heating element, and the lower mold comprises a lower heating element and a lower pressing block, wherein the lower pressing block abuts against the lower heating element;

[0008] The upper pressing block is provided with a convex portion, and the lower pressing block is provided with a concave portion, and the convex portion and the concave portion cooperate to fix the flexible braided belt;

[0009] The upper heating element has an upper profiling groove, the lower heating element has a lower profiling groove, the upper profiling groove is arranged opposite to the lower profiling groove, the lower pressing block is provided with a glue retaining wall, the highest point of the glue retaining wall is higher than the lowest point of the lower profiling groove.

[0010] As a further improved technical solution of the utility model, the glue retaining wall is arranged in the recessed portion, and the height of the glue retaining wall decreases from the side close to the lower profiling groove toward the side away from the lower profiling groove.

[0011] As a further improved technical solution of the utility model, the highest point of the glue retaining wall is lower than the upper surface of the lower pressing block.

[0012] As a further improved technical solution of the utility model, the upper profiling groove includes a first upper sub-groove and a second upper sub-groove, the first upper sub-groove is closer to the upper pressing block than the second upper sub-groove, and the groove depth of the first upper sub-groove is greater than the groove depth of the second upper sub-groove;

[0013] The lower contour groove includes a first lower groove and a second lower sub-groove, the first lower sub-groove is closer to the lower pressing block than the second lower sub-groove, and the groove depth of the first lower sub-groove is greater than the groove depth of the second lower sub-groove.

[0014] As a further improved technical solution of the utility model, the highest point of the glue retaining wall is higher than the bottom of the first lower sub-groove.

[0015] As a further improved technical solution of the present invention, the groove depth of the second upper sub-groove increases from the side close to the first upper sub-groove toward the side away from the first upper sub-groove, and the groove depth of the second lower sub-groove increases from the side close to the first lower sub-groove toward the side away from the first lower sub-groove.

[0016] As a further improved technical solution of the present invention, the width of the second upper sub-groove is smaller than the width of the first upper sub-groove, and the width of the second lower sub-groove is smaller than the width of the first lower sub-groove.

[0017] As a further improved technical solution of the utility model, the upper mold is provided with an upper fixing groove for accommodating the upper pressing block, and upper mounting grooves extend from both sides of the upper fixing groove;

[0018] The lower mold is provided with a lower fixing groove for accommodating the lower pressing block, and lower mounting grooves extend from both sides of the lower fixing groove.

[0019] As a further improved technical solution of the utility model, the upper pressure block is provided with a stopper, the stopper is arranged on the raised portion, and the lowest point of the stopper is lower than the bottom of the upper contoured groove.

[0020] As a further improved technical solution of the utility model, the hot melt jig also includes a handle, and the handle is fixed to the lower mold.

[0021] Compared with the prior art, the hot melt fixture of the utility model has the following beneficial effects: the PC sheet is fused to the flexible braided belt, thereby changing the structural properties within a small range of the flexible braided belt, which is convenient for subsequent processing and connection with hardness and rigidity requirements; the upper and lower heating elements are both provided with profiling grooves to fix the shape of the PC liquid after solidification; the upper and lower pressing blocks are respectively arranged to abut the upper and lower heating elements to prevent the temperature generated by the hot melt from scalding the surface of the surrounding braided belt; the lower pressing block is provided with a glue retaining wall higher than the lower profiling groove to prevent the PC liquid after hot melting from overflowing due to gravity, thereby improving the fusion effect. The hot melt fixture has a simple structure, solves the problem that the flexible braided watch strap itself has high elasticity and lacks the hardness and rigidity requirements for assembly with the two end connectors, and has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of a hot melt fixture according to a specific embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of hot melting of a flexible braided belt and a PC sheet in a specific embodiment of the utility model;

[0024] Figure 3 It is a three-dimensional structural schematic diagram of an upper heating element and a lower heating element of a specific embodiment of the utility model;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of an upper pressing block in a specific embodiment of the utility model;

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of a lower pressing block of a specific embodiment of the utility model;

[0027] Figure 6 This is a schematic structural diagram of a lower mold according to a specific embodiment of the utility model;

[0028] Figure 7 for Figure 6 Schematic diagram of the enlarged structure of the A area in the middle;

[0029] Figure 8 This is a schematic structural diagram of an upper mold according to a specific embodiment of the utility model;

[0030] Fig. 9 for Figure 8 Schematic diagram of the enlarged structure of area B in the middle. DETAILED DESCRIPTION

[0031] The exemplary embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. If there are several embodiments, the features of these embodiments can be combined with each other without conflict. When the description refers to the drawings, unless otherwise specified, the same numbers in different drawings represent the same or similar elements. The contents described in the following exemplary embodiments do not represent all embodiments consistent with the present invention; on the contrary, they are merely examples of devices, products and / or methods that are consistent with some aspects of the present invention and are recorded in the claims of the present invention.

[0032] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the scope of protection of the present invention. The singular forms "a", "said" or "the" used in the specification and claims of the present invention are also intended to include plural forms, unless the context clearly indicates other meanings.

[0033] It should be understood that the words used in the specification and claims of the present invention, such as "first", "second" and similar words, do not indicate any order, quantity or importance, but are only used to distinguish the names of features. Similarly, words such as "one" or "an" do not indicate a quantitative limitation, but indicate the existence of at least one. Unless otherwise specified, words such as "front", "rear", "upper", "lower" and similar words appearing in the present invention are only for the convenience of description and are not limited to a specific position or a spatial orientation. Words such as "include" or "comprise" are an open-ended expression, meaning that the elements appearing before "include" or "comprises" include the elements appearing after "include" or "comprises" and their equivalents, which does not exclude that the elements appearing before "include" or "comprises" may also include other elements.

[0034] If “several” appears in the present invention, it means two or more.

[0035] See also Figures 1 to 9 As shown, the embodiment of the utility model discloses a hot melt jig, which is suitable for fusing a PC sheet 200 to a flexible braided belt 100. The hot melt jig includes an upper mold and a lower mold, the upper mold includes an upper heating element 10 and an upper pressing block 20, the upper pressing block 20 abuts against the upper heating element 10, and the lower mold includes a lower heating element 30 and a lower pressing block 40, the lower pressing block 40 abuts against the lower heating element 30. The hot melt jig fuses two PC sheets 200 from the upper and lower surfaces of the flexible braided belt 100 respectively through the upper heating element 10 and the lower heating element 30, so that the flexible braided belt 100 has its own elasticity and can be firmly assembled with other parts.

[0036] See also Figure 1 and Figure 2As shown, the flexible braided belt 100 is at least partially located between the upper mold and the lower mold, specifically, the flexible braided belt 100 is at least partially located between the upper heating element 10 and the lower heating element 30, and at least partially located between the upper pressing block 20 and the lower pressing block 40. The two PC sheets are respectively located between the upper heating element 10 and the flexible braided belt 100, and between the lower heating element 30 and the flexible braided belt 100. The arrangement of the upper pressing block 20 and the lower pressing block 40 can prevent the temperature generated when the upper heating element 10 and the lower heating element 30 heat and melt the PC sheet 200 from scalding the surface of the surrounding flexible braided belt 100.

[0037] See also Figure 2 , Figure 4 and Figure 5 As shown, the upper pressing block 20 is provided with a protrusion 21, and the lower pressing block 40 is provided with a recessed portion 41, and the protrusion 21 and the recessed portion 41 cooperate to fix the flexible braided belt 100. Further, the width of the recessed portion 41 is equivalent to the width of the flexible braided belt 100, so that the flexible braided belt 100 can be limited to the recessed portion 41; the depth of the recessed portion 41 is equivalent to or greater than the thickness of the flexible braided belt 100, so that the flexible braided belt 100 can be better fixed between the upper pressing block 20 and the lower pressing block 40; the width of the protrusion 21 is equivalent to or less than the width of the recessed portion 41, so that the protrusion 21 and the recessed portion 41 can better cooperate to clamp and fix the flexible braided belt 100.

[0038] See also Figure 2 and Figure 3 As shown, the upper heating element 10 is arranged opposite to the lower heating element 30, the upper heating element 10 has an upper profiling groove 11, and the lower heating element 30 has a lower profiling groove 31, and the upper profiling groove 11 is arranged opposite to the lower profiling groove 31. In some embodiments, the upper profiling groove 11 and the lower profiling groove 31 have the same shape and size. The upper heating element 10 and the lower heating element 30 are used to heat and melt the two PC sheets 200 on both sides of the flexible braided belt 100, so that they melt into PC liquid, and the upper profiling groove 11 and the lower profiling groove 31 are used to fix the shape of the PC liquid after solidification, so that it is integrated into the flexible braided belt 100 and forms a new mixture with the flexible braided belt 100.

[0039] See also Figures 5 to 7As shown, the lower pressing block 40 is also provided with a glue retaining wall 42, the highest point of which is higher than the lowest point of the lower profiling groove 31. Further, the glue retaining wall 42 is arranged in the recessed portion 41, and the width of the glue retaining wall 42 is equivalent to the width of the recessed portion 41, and the height of the glue retaining wall 42 decreases from the side close to the lower profiling groove 31 toward the side away from the lower profiling groove 31; that is, the highest point of the glue retaining wall 42 is the side closest to the lower profiling groove 31. Further, the highest point of the glue retaining wall 42 is lower than the upper surface of the lower pressing block 40, so as not to affect the position limiting of the flexible braided belt 100 by the recessed portion 41. The setting of the glue retaining wall 42 can prevent the PC liquid after hot melting from overflowing due to gravity, and cooperate with the lower profiling groove 31 to fix the PC in the hot melting area, so that the part of the flexible braided belt 100 corresponding to the hot melting area is fused with the PC to form a mixture with the physical properties of PC.

[0040] See also Figure 3 , Figures 6 to 9 As shown, the upper profiling groove 11 includes a first upper sub-groove 111 and a second upper sub-groove 112, and the first upper sub-groove 111 is closer to the upper pressing block 20 than the second upper sub-groove 112; the lower profiling groove 31 includes a first lower groove 311 and a second lower sub-groove 312, and the first lower groove 311 is closer to the lower pressing block 40 than the second lower sub-groove 312. The highest point of the adhesive retaining wall 42 is higher than the bottom of the first lower groove 311; the widths of the first upper sub-groove 111 and the first lower groove 311 are equivalent to the width of the flexible braided belt 100. In the present application, the first upper sub-groove 111 and the first lower groove 311 are used to shape the PC sheet 200 after it is melted into PC liquid and then solidified. The first upper sub-groove 111 and the first lower groove 311 can enclose a through hole with a size equivalent to the cross-sectional shape of the flexible braided belt 100, so that the PC sheet 200 and the flexible braided belt 100 are integrated into one; the second upper sub-groove 112 and the second lower sub-groove 312 are used to guide the excess PC liquid to overflow, and the overflow portion is cut off after the PC liquid solidifies.

[0041] Furthermore, the groove depth of the first upper sub-groove 111 is greater than the groove depth of the second upper sub-groove 112, and the groove depth of the first sub-groove 311 is greater than the groove depth of the second lower sub-groove 312; this arrangement is to enable the PC sheet 200 to be fully melted into the flexible braided belt 100 after being melted into PC liquid, without excessive PC liquid overflowing. The groove depth of the second upper sub-groove 112 increases from the side close to the first upper sub-groove 111 toward the side away from the first upper sub-groove 111, and the groove depth of the second lower sub-groove 312 increases from the side close to the first sub-groove 311 toward the side away from the first sub-groove 311; this arrangement can better guide the excess PC liquid to overflow.

[0042] Furthermore, the width of the second upper sub-groove 112 is smaller than that of the first upper sub-groove 111, and the width of the second lower sub-groove 312 is smaller than that of the first lower groove 311. This arrangement is also to allow the PC liquid to be more fully melted in the flexible braided belt 100.

[0043] In some embodiments, see Figure 4 , Figure 8 and Fig. 9 As shown, the upper pressing block 20 is further provided with a stopper 22, which is arranged on the protruding portion 21, and the lowest point of the stopper 22 is lower than the bottom of the upper profiling groove 11 (from Figure 8 and Fig. 9 The lowest point of the stopper 22 is higher than the bottom of the upper profiling groove 11 from a perspective of FIG. 1 . The stopper 22 of the upper pressing block 20 corresponds to the glue retaining wall 42 of the lower pressing block 40 . The stopper 22 protrudes from the surface of the protruding portion 21 , and the protruding height of the stopper 22 decreases from the side close to the upper heating element 10 toward the side away from the upper heating element 10 .

[0044] In other embodiments, the upper pressing block 20 is not provided with the stopper 22 , that is, the surface of the raised portion 21 has no protrusions and is formed into a plane.

[0045] Furthermore, the side of the upper pressing block 20 abutting against the upper heating element 10 and the side of the lower pressing block 40 abutting against the lower heating element 30 are both flat surfaces without protrusions or depressions. This arrangement can make the PC sheet 200 evenly stressed during hot melting, and the liquid after hot melting of the PC sheet 200 can be evenly distributed in the hot melting area, so that it can form a flat surface after solidification.

[0046] See also Figure 6 and Figure 8 As shown, the upper mold is provided with an upper fixing groove 51 for accommodating the upper pressing block 20, and the lower mold is provided with a lower fixing groove 61 for accommodating the lower pressing block 40. Furthermore, upper mounting grooves 52 extend from both sides of the upper fixing groove 51, and lower mounting grooves 62 extend from both sides of the lower fixing groove 61. The arrangement of the upper mounting grooves 52 and the lower mounting grooves 62 makes it more convenient to take and place the upper pressing block 20 and the lower pressing block 40.

[0047] See also Figure 1 and Figure 6 As shown, the hot melt jig of the present application further includes a handle 70 fixed to the lower mold. The arrangement of the handle 70 facilitates personnel to perform flipping operations on the hot melt jig.

[0048] When the hot melt jig of this embodiment fuses the PC sheet 200 with the flexible braided belt 100, first one PC sheet 200 is positioned on the lower mold, and then the flexible braided belt 100 is placed on the lower mold and the PC sheet 200, and then another PC sheet 200 is placed on the flexible braided belt 100, and the two PC sheets 200 are placed correspondingly. Finally, the upper mold is pressed down to close the hot melt jig, and the upper heating element 10 and the lower heating element 30 are heated. After the PC sheet 200 is melted into PC liquid, the heating is stopped, and the mold is opened after the PC liquid is cooled and solidified, thus completing the small-scale modification of the flexible braided belt 100, so that when the flexible braided belt 100 is subsequently assembled with the metal connector, it can achieve the corresponding precision and fit, and can achieve a certain degree of tightness and strength after assembly.

[0049] In summary, compared with the prior art, the hot melt fixture of the utility model has the following advantages: the PC sheet 200 is fused to the flexible braided belt 100, thereby changing the structural properties within a small range of the flexible braided belt 100, which is convenient for subsequent processing and connection with hardness and rigidity requirements; the upper and lower heating elements are both provided with profiling grooves to fix the shape of the PC liquid after solidification; the upper and lower pressing blocks are respectively arranged to abut the upper and lower heating elements to prevent the temperature generated by the hot melt from scalding the surface of the surrounding braided belt; the lower pressing block 40 is provided with a glue retaining wall 42 higher than the lower profiling groove 31 to prevent the PC liquid after hot melting from overflowing due to gravity, thereby improving the fusion effect. The hot melt fixture has a simple structure, solves the problem that the flexible braided watchband itself has high elasticity and lacks the hardness and rigidity requirements for assembly with the two end connectors, and has strong adaptability.

[0050] The above implementation modes are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. The understanding of this specification should be based on the technical personnel in the relevant technical field. Although this specification has described the present invention in detail with reference to the above embodiments, ordinary technical personnel in the field should understand that the technical personnel in the relevant technical field can still modify or make equivalent substitutions to the present invention, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A hot melt jig, suitable for fusing a PC sheet to a flexible braided belt, characterized in that: The mold comprises an upper mold and a lower mold, wherein the upper mold comprises an upper heating element (10) and an upper pressing block (20), wherein the upper pressing block (20) abuts against the upper heating element (10), and the lower mold comprises a lower heating element (30) and a lower pressing block (40), wherein the lower pressing block (40) abuts against the lower heating element (30); The upper pressing block (20) is provided with a raised portion (21), and the lower pressing block (40) is provided with a recessed portion (41), and the raised portion (21) and the recessed portion (41) cooperate to fix the flexible braided belt (100); The upper heating element (10) has an upper profiling groove (11), the lower heating element (30) has a lower profiling groove (31), the upper profiling groove (11) and the lower profiling groove (31) are arranged opposite to each other, the lower pressing block (40) is provided with a glue retaining wall (42), the highest point of the glue retaining wall (42) is higher than the lowest point of the lower profiling groove (31).

2. The hot melt fixture according to claim 1, characterized in that: The glue retaining wall (42) is arranged on the recessed portion (41), and the height of the glue retaining wall (42) decreases from a side close to the lower profiling groove (31) toward a side away from the lower profiling groove (31).

3. The hot melt fixture according to claim 2, characterized in that: The highest point of the glue retaining wall (42) is lower than the upper surface of the lower pressing block (40).

4. The hot melt fixture according to claim 1, characterized in that: The upper profiling groove (11) comprises a first upper sub-groove (111) and a second upper sub-groove (112); the first upper sub-groove (111) is closer to the upper pressing block (20) than the second upper sub-groove (112); and the groove depth of the first upper sub-groove (111) is greater than the groove depth of the second upper sub-groove (112); The lower contour groove (31) comprises a first lower groove (311) and a second lower sub-groove (312); the first lower sub-groove (311) is closer to the lower pressing block (40) than the second lower sub-groove (312); and the groove depth of the first lower sub-groove (311) is greater than the groove depth of the second lower sub-groove (312).

5. The hot melt fixture according to claim 4, characterized in that: The highest point of the glue retaining wall (42) is higher than the bottom of the first lower sub-groove (311).

6. The hot melt fixture according to claim 4, characterized in that: The groove depth of the second upper sub-groove (112) increases from a side close to the first upper sub-groove (111) toward a side away from the first upper sub-groove (111), and the groove depth of the second lower sub-groove (312) increases from a side close to the first lower sub-groove (311) toward a side away from the first lower sub-groove (311).

7. The hot melt fixture according to claim 4, characterized in that: The width of the second upper sub-groove (112) is smaller than the width of the first upper sub-groove (111), and the width of the second lower sub-groove (312) is smaller than the width of the first lower sub-groove (311).

8. The hot melt fixture according to claim 1, characterized in that: The upper mold is provided with an upper fixing groove (51) for accommodating the upper pressing block (20), and upper mounting grooves (52) extend from both sides of the upper fixing groove (51); The lower mold is provided with a lower fixing groove (61) for accommodating the lower pressing block (40), and lower mounting grooves (62) extend from both sides of the lower fixing groove (61).

9. The hot melt fixture according to claim 1, characterized in that: The upper pressing block (20) is provided with a stopper (22), and the stopper (22) is arranged on the protruding portion (21), and the lowest point of the stopper (22) is lower than the bottom of the upper contoured groove (11).

10. The hot melt fixture according to claim 1, characterized in that: The hot melt jig also includes a handle (70), and the handle (70) is fixed to the lower mold.

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