Packing belt extrusion die

Abstract

The utility model discloses a packing belt extrusion die which comprises an upper die plate, a lower die plate, a plurality of upper heating pipes, a plurality of lower heating pipes and at least one pair of short heating pipes, the upper die plate is detachably covered on the top wall of the lower die plate, an upper molded surface is arranged on the bottom wall of the upper die plate, a lower molded surface is arranged on the top wall of the lower die plate, and the short heating pipes are arranged on the lower molded surface. The upper molding surface and the lower molding surface are mutually enclosed to form a runner, the plurality of upper heating pipes are sleeved in the upper mold plate, are distributed along the width direction of the upper mold plate and are adjacent to the upper molding surface, the plurality of lower heating pipes are sleeved in the lower mold plate, are distributed along the width direction of the lower mold plate and are adjacent to the lower molding surface, and the short heating pipes are symmetrically sleeved on two sides of the rear end of the lower mold plate. The heating pipes are arranged in the feeding channel and extend to the two sides of the feeding channel respectively, so that the heating pipes serve as heat sources to heat a raw material flowing channel composed of the feeding channel and the flow channel more uniformly, the temperature of raw materials in the raw material flowing channel is kept uniform, and the flowability of the raw materials in the raw material flowing channel is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a packing tape extrusion mold. Background Art

[0002] In the logistics industry, strapping tape is an important component of goods packaging consumables. With the continuous development of the logistics industry, the market requirements for the performance and quality of strapping tape are getting higher and higher. The strapping tape extrusion die is usually composed of an upper template and a lower template. The molten raw material flows into the flow channel surrounded by the upper template and the lower template, and is finally extruded from the slit outlet at one end of the flow channel to become a strip of molten rough billet. The strip of molten rough billet becomes a strapping tape of the required size after stretching. Generally, heating rings are usually installed on the upper template and the lower template. The upper template and the lower template are heated by the heating ring to maintain the temperature of the raw material and ensure the fluidity of the raw material in the flow channel.

[0003] However, due to the irregular structure of the flow channel, the heating ring arranged on the outside of the template often cannot ensure uniform temperature throughout the flow channel, resulting in uneven heating of the raw materials in the flow channel and poor fluidity. Utility Model Content

[0004] In view of this, the utility model provides a strapping tape extrusion die, which is used to solve the problem that the flow channel structure of the strapping tape extrusion die in the prior art is irregular, and the heating ring arranged on the outside of the template often cannot ensure uniform temperature throughout the flow channel, resulting in uneven heating of the raw materials in the flow channel and poor fluidity.

[0005] In order to achieve one or part or all of the above purposes or other purposes, the utility model proposes a packing tape extrusion die, including an upper die plate, a lower die plate, a plurality of upper heating tubes, a plurality of lower heating tubes and at least one pair of short heating tubes, the upper die plate can be detachably covered on the top wall of the lower die plate, the bottom wall of the upper die plate is provided with an upper profile, the top wall of the lower die plate is provided with a lower profile, the upper profile and the lower profile are mutually surrounded to form a flow channel, the flow channel includes a main flow channel and a plurality of branch flow channels, the main flow channel is arranged along the length direction of the lower die plate, the plurality of branch flow channels are evenly distributed at both ends of the main flow channel, the rear end of the branch flow channel is connected to the corresponding end of the main flow channel The branch channel is arranged along the width direction of the lower template, and the rear end of the lower template is provided with a feed channel along its width direction, and the feed channel connects the middle part of the main channel with the outside world. The front end of the upper template is provided with a discharge port corresponding to the branch channel one by one, and the discharge port connects the corresponding front end of the branch channel with the outside world. The multiple upper heating tubes are all sleeved in the upper template and distributed along the width direction of the upper template, adjacent to the upper mold surface. The multiple lower heating tubes are all sleeved in the lower template and distributed along the width direction of the lower template, adjacent to the lower mold surface. The short heating tubes are symmetrically sleeved on both sides of the rear end of the lower template, and extend to both sides of the feed channel respectively.

[0006] Preferably, the strapping tape extrusion die also includes a die block, the top surface of the lower template near the front end is a molding area, and the top surface of the lower template near the rear end is a clamping area, the upper molding surface is arranged in the clamping area, the upper template is detachably covered in the clamping area, the die block is detachably arranged in the molding area and blocks the discharge port, a plurality of first through grooves are distributed along the length direction on the bottom wall of the die block, the first through grooves are connected to the discharge port one by one, and the inner wall of the first through groove and the top wall of the lower template enclose a molding channel.

[0007] Preferably, a plurality of second through grooves are distributed along the length direction of the top wall of the die block, the second through grooves correspond to the first through grooves one by one, and the cross-sectional area of ​​the second through grooves is different from the cross-sectional area of ​​the first through grooves.

[0008] Preferably, the upper template is fixedly connected to the lower template by screws, and the die block is fixedly connected to the upper template and the lower template by screws.

[0009] Preferably, a plurality of edge through holes are distributed circumferentially on the top wall of the upper template, a plurality of middle through holes are distributed along the length direction in the middle part of the upper template, a plurality of edge screw holes are provided on the edge of the top wall of the lower template corresponding one-to-one to the edge through holes, a plurality of middle screw holes are provided in the middle part of the top wall of the lower template corresponding one-to-one to the middle through holes, a plurality of first through holes are distributed on the front side wall of the die block along the length direction, a plurality of first screw holes are provided at the front end of the upper template corresponding one-to-one to the first through holes, a plurality of second through holes are distributed on the upper side wall of the die block along the length direction, and a plurality of second screw holes are provided in the molding area of ​​the lower template corresponding one-to-one to the second through holes.

[0010] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0011] After adopting the above-mentioned strapping extrusion die, the upper heating tube passes through the left and right ends of the upper template along the length direction of the upper template, and the lower heating tube passes through the left and right ends of the lower template along the length direction of the lower template, so that the upper heating tube covers the area where the upper mold surface is located, and the lower heating tube covers the area where the lower mold surface is located, and the two short heating tubes are arranged on both sides of the feed channel opposite to each other to cover the area where the feed channel is located, so that the heating tube can serve as a heat source to more evenly heat the raw material flow channel composed of the feed channel and the flow channel, so that the temperature of the raw material in the raw material flow channel remains uniform, thereby ensuring the fluidity of the raw material in the raw material flow channel, facilitating the extrusion of the raw material, and ensuring the quality of the strip molten rough billet. At the same time, it is only necessary to open corresponding holes along the length direction of the upper template and the lower template for installing the upper heating tube, the lower heating tube and the short heating tube. Compared with the grooves for installing the heating tubes in the past, the processing of the holes is simpler, which can effectively reduce the processing difficulty and cost of the template and improve the economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] in:

[0014] Figure 1 It is a three-dimensional diagram of the utility model;

[0015] Figure 2 This is an exploded view of the utility model after the screws are removed;

[0016] Figure 3 It is a perspective view of the utility model from a top view angle;

[0017] Figure 4 It is a transverse cross-sectional view of the utility model.

[0018] In the figure: 1. upper template; 11. discharge port; 12. edge through hole; 13. middle through hole; 14. first screw hole; 2. lower template; 21. feed channel; 22. edge screw hole; 23. middle screw hole; 24. second screw hole; 3. upper heating tube; 4. lower heating tube; 5. short heating tube; 61. main channel; 62. branch channel; 63. molding channel; 7. mold block; 71. first through groove; 72. second through groove; 73. first through hole; 74. second through hole; 81. molding area; 82. mold closing area. DETAILED DESCRIPTION

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0022] like Figure 1-4 As shown, a packing tape extrusion die comprises an upper die plate 1, a lower die plate 2, a plurality of upper heating tubes 3, a plurality of lower heating tubes 4 and at least one pair of short heating tubes 5. The upper die plate 1 is detachably covered on the top wall of the lower die plate 2. An upper profile is arranged on the bottom wall of the upper die plate 1, and a lower profile is arranged on the top wall of the lower die plate 2. The upper profile and the lower profile are mutually surrounded to form a flow channel. The flow channel comprises a main flow channel 61 and a plurality of branch flow channels 62. The main flow channel 61 is arranged along the length direction of the lower die plate 2, and the plurality of branch flow channels 62 are evenly distributed at both ends of the main flow channel 61. The rear end of the branch flow channel 62 is connected to the corresponding end of the main flow channel 61. The branch flow channel 62 is arranged along the width direction of the lower die plate 2. Direction setting, the rear end of the lower template 2 is provided with a feed channel 21 along its width direction, the feed channel 21 connects the middle part of the main channel 61 with the outside world, the front end of the upper template 1 and the branch channel 62 are provided with a discharge port 11 corresponding to each other, the discharge port 11 connects the corresponding front end of the branch channel 62 with the outside world, a plurality of upper heating tubes 3 are all sleeved in the upper template 1, and are distributed along the width direction of the upper template 1, adjacent to the upper mold surface, a plurality of lower heating tubes 4 are all sleeved in the lower template 2, and are distributed along the width direction of the lower template 2, adjacent to the lower mold surface, and the short heating tubes 5 are symmetrically sleeved on both sides of the rear end of the lower template 2, and extend to both sides of the feed channel 21 respectively.

[0023] Specifically, the discharge end of the raw material extrusion equipment is connected to the outer end of the feed channel 21. The plastic raw material extruded by the extrusion equipment will flow into the main channel 61 from the feed channel 21, and then be diverted to multiple branch channels 62 through the main channel 61, and finally be extruded through the discharge port 11 corresponding to the branch channel 62 to become a strip-shaped molten rough billet, so as to extrude and produce multiple strip-shaped molten rough billets at the same time, thereby improving production efficiency; the heating rods are all connected to an external power supply through electric wires for use.

[0024] In this embodiment, the upper heating tube 3 passes through the left and right ends of the upper template 1 along the length direction of the upper template 1, and the lower heating tube 4 passes through the left and right ends of the lower template 2 along the length direction of the lower template 2, so that the upper heating tube 3 covers the area where the upper mold surface is located, and the lower heating tube 4 covers the area where the lower mold surface is located, and the two short heating tubes 5 are arranged on both sides of the feed channel 21 opposite to each other to cover the area where the feed channel 21 is located, so that the heating tube can serve as a heat source to more evenly heat the raw material flow channel composed of the feed channel 21 and the flow channel, so that the temperature of the raw material in the raw material flow channel remains uniform, thereby ensuring the fluidity of the raw material in the raw material flow channel, facilitating the extrusion of the raw material, and ensuring the quality of the strip molten rough billet. At the same time, it is only necessary to open corresponding holes along the length direction of the upper template 1 and the lower template 2 for installing the upper heating tube 3, the lower heating tube 4 and the short heating tube 5. Compared with the grooves for installing the heating tubes in the past, the processing of the holes is simpler, which can effectively reduce the processing difficulty and cost of the template and improve the economic benefits.

[0025] Furthermore, the strapping tape extrusion die also includes a long strip die block 7, the top surface of the lower mold plate 2 near the front end is a molding area 81, and the rear end thereof is a clamping area 82, the upper mold surface is arranged in the clamping area 82, the upper mold plate 1 is detachably covered in the clamping area 82, the die block 7 is detachably arranged in the molding area 81, and blocks the discharge port 11, and a plurality of first through grooves 71 are distributed along the length direction on the bottom wall of the die block 7, and the first through grooves 71 are connected to the discharge port 11 one by one, and the first through grooves 71 are connected to the discharge port 11 one by one. The inner wall of the groove 71 and the top wall of the lower template 2 enclose a molding channel 63. When the raw material flows through the feed channel 21, the main channel 61, the branch channel 62 and the discharge port 11 in sequence, it will be cooled and formed through the molding channel 63 and extruded to the outside, so that the molding channel 63 can assist the raw material in cooling and shaping during extrusion. The user can select the first through groove 71 with different cross-sectional areas by replacing the die block 7, thereby changing the cross-sectional area of ​​the molding channel 63, so as to extrude strip-shaped molten rough blanks with different cross-sectional sizes according to production needs.

[0026] Furthermore, a plurality of second through grooves 72 are distributed along the length direction of the top wall of the die block 7, and the second through grooves 72 correspond to the first through grooves 71 one by one, and the cross-sectional area of ​​the second through grooves 72 is different from the cross-sectional area of ​​the first through grooves 71, so that the user can invert the die block 7 and use the second through grooves 72 and the top wall of the lower template 2 to enclose a molding channel 63 with different diameters, thereby changing the size of the extruded strip-shaped molten billet, so that the die block 7 can take into account the extrusion of two sizes of strip-shaped molten billets.

[0027] Furthermore, the upper template 1 is fixedly connected to the lower template 2 by screws, and the die block 7 is fixedly connected to the upper template 1 and the lower template 2 by screws.

[0028] Furthermore, a plurality of edge through holes 12 are distributed circumferentially on the top wall of the upper template 1, a plurality of middle through holes 13 are distributed along the length direction in the middle part of the upper template 1, a plurality of edge screw holes 22 are provided on the edge of the top wall of the lower template 2 in one-to-one correspondence with the edge through holes 12, a plurality of middle screw holes 23 are provided in the middle part of the top wall of the lower template 2 in one-to-one correspondence with the middle through holes 13, a plurality of first through holes 73 are distributed on the front side wall of the die block 7 in the length direction, a plurality of first screw holes 14 are provided at the front end of the upper template 1 in one-to-one correspondence with the first through holes 73, a plurality of second through holes 74 are distributed on the upper side wall of the die block 7 in the length direction, and a plurality of second screw holes 24 are provided in one-to-one correspondence with the second through holes 74 at the molding area 81 of the lower template 2.

[0029] Specifically, when installing the upper template 1, first cover the upper template 1 on the mold area 82 of the lower template 2, align the edge through holes 12 with the edge screw holes 22, and the middle through holes 13 with the middle screw holes 23 one by one, and then screw through the edge through holes 12 one by one and screw into the corresponding edge screw holes 22, and screw through the middle through holes 13 with the corresponding middle screw holes 23, so that the upper template 1 can be fixed on the lower template 2, so that the upper mold surface and the lower mold surface are fixed to form a flow channel; when installing the die block 7, First, place the die block 7 on the molding area 81 of the lower mold plate 2, align the first through hole 73 with the first screw hole 14, and the second through hole 74 with the second screw hole 24 one by one, and then pass the screws through the first through holes 73 and screw them into the first screw holes 14 one by one, and pass the screws through the second through holes 74 and screw them into the second screw holes 24, so that the die block 7 can be fixed on the front end of the upper mold plate 1 and the top wall of the lower mold plate 2, so that the first through groove 71 and the top wall of the lower mold plate 2 enclose a molding channel 63 connected to the discharge port 11.

[0030] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A strapping tape extrusion die, characterized in that: include: An upper mold plate, a lower mold plate, a plurality of upper heating tubes, a plurality of lower heating tubes and at least one pair of short heating tubes; The upper template is detachably covered on the top wall of the lower template, an upper profile is provided on the bottom wall of the upper template, a lower profile is provided on the top wall of the lower template, the upper profile and the lower profile are mutually surrounded to form a flow channel, the flow channel includes a main flow channel and a plurality of branch flow channels, the main flow channel is arranged along the length direction of the lower template, a plurality of branch flow channels are evenly distributed at both ends of the main flow channel, the rear end of the branch flow channel is connected with the corresponding end of the main flow channel, the branch flow channel is arranged along the width direction of the lower template, the rear end of the lower template is provided with a feed channel along its width direction, the feed channel connects the middle part of the main flow channel with the outside world, the front end of the upper template and the branch flow channel are provided with a discharge port one by one, the discharge port connects the corresponding front end of the branch flow channel with the outside world; The plurality of upper heating tubes are all sleeved in the upper template and distributed along the width direction of the upper template, adjacent to the upper mold surface; the plurality of lower heating tubes are all sleeved in the lower template and distributed along the width direction of the lower template, adjacent to the lower mold surface; the short heating tubes are symmetrically sleeved on both sides of the rear end of the lower template and extend to both sides of the feed channel respectively.

2. A strapping tape extrusion die according to claim 1, characterized in that: The strapping tape extrusion die also includes a die block, the top surface of the lower template near the front end is a molding area, and the top surface of the lower template near the rear end is a clamping area, the upper molding surface is arranged in the clamping area, the upper template is detachably covered in the clamping area, the die block is detachably arranged in the molding area and blocks the discharge port, a plurality of first through grooves are distributed along the length direction on the bottom wall of the die block, the first through grooves are connected to the discharge port one by one, and the inner wall of the first through groove and the top wall of the lower template enclose a molding channel.

3. A strapping tape extrusion die according to claim 2, characterized in that: A plurality of second through slots are distributed along the length direction of the top wall of the die block, the second through slots correspond to the first through slots one by one, and the cross-sectional area of ​​the second through slots is different from the cross-sectional area of ​​the first through slots.

4. A strapping tape extrusion die according to claim 2, characterized in that: The upper template is fixedly connected to the lower template by screws, and the die block is fixedly connected to the upper template and the lower template by screws.

5. A strapping tape extrusion die according to claim 2, characterized in that: A plurality of edge through holes are distributed circumferentially on the top wall of the upper template, a plurality of middle through holes are distributed along the length direction in the middle part of the upper template, a plurality of edge screw holes are provided on the edge of the top wall of the lower template in one-to-one correspondence with the edge through holes, a plurality of middle screw holes are provided in the middle part of the top wall of the lower template in one-to-one correspondence with the middle through holes, a plurality of first through holes are distributed on the front side wall of the die block in the length direction, a plurality of first screw holes are provided on the front end of the upper template in one-to-one correspondence with the first through holes, a plurality of second through holes are distributed on the upper side wall of the die block in the length direction, and a plurality of second screw holes are provided in one-to-one correspondence with the second through holes at the molding area of ​​the lower template.

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