An adjustable die for expanding heat shrink tubing

Abstract

This invention relates to the technical field of hydraulic gate hoisting equipment in water conservancy facilities, specifically an adjustable die head for expanding heat shrink tubing. The invention includes a die head body, which comprises a basic tube and an adjusting part. The adjusting part includes a first circular tube, within which a tube diameter adjustment component is disposed. The tube diameter adjustment component includes several first fixed plates, each of which includes two identical second fixed plates. Each second fixed plate has an arc-shaped through hole on one side, with one end of the arc-shaped through hole penetrating the corresponding second fixed plate. This invention allows operators to precisely adjust the outlet size according to actual needs, reducing preparation time and improving work efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of heat shrink tubing adjustment dies, and in particular to an adjustable die for heat shrink tubing expansion. Background Technology

[0002] The main body of a heat shrink tubing expansion mold generally consists of a vacuum chamber, a cooling chamber, and a die head. Currently, traditional processes often integrate the vacuum chamber and cooling chamber into a single mold. Since the inner diameter of this single mold is fixed, when the original size of the heat shrink tubing to be expanded differs, adjustment using the die head is necessary to ensure a tight seal during expansion. In other words, the die head size determines the final product's appearance. Generally, the die head size is fixed, so a single specification of heat shrink tubing may require multiple die heads of different sizes for adjustment to find the appropriate size.

[0003] Chinese Patent Publication No. CN106671397A discloses an outlet mold and a heat shrink tubing expansion device having the same. The outlet mold for the heat shrink tubing expansion device includes: a sleeve; a waterproof connector fitted into the sleeve; wherein the waterproof connector includes: a connector head; a hinge piece disposed at one end of the connector head; and an end cap, with a clamp disposed at one end of the connector head of the hinge piece. This outlet mold and heat shrink tubing expansion device, through an improvement in using a straight pipe connector fitted with a waterproof connector, makes the outlet diameter of the mold adjustable.

[0004] However, this adjustment method is still in the exploratory stage. Compared to the traditional method, dimensional changes are adjusted within the same die head. Operators cannot quickly determine the outlet size, the adjustment process is lengthy, and the efficiency of preliminary preparation work is reduced. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an adjustable die head for heat shrink tubing expansion, which allows operators to accurately adjust the outlet size according to actual needs, reducing preparation time and improving work efficiency.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0007] An adjustable die head for expanding heat shrink tubing includes a die head body, the die head body including a base tube and an adjustment part, the adjustment part including a first circular tube, and a tube diameter adjustment component disposed inside the first circular tube.

[0008] The pipe diameter adjustment component includes several first fixing plates, each of which includes two second fixing plates of the same shape. Each second fixing plate has an arc-shaped through hole on one side, and one end of the arc-shaped through hole passes through the corresponding second fixing plate.

[0009] When two second fixing plates in each of the first fixing plates are spliced ​​together, the two arc-shaped through holes form a complete circle. Several second fixing plates are arranged in order of the size of the diameter of the complete circle holes. Several second fixing plates form a cuboid. The vertical cross section of the through holes inside the cuboid is a frustum shape.

[0010] The pipe diameter variation component also includes an adjustment component, which changes the minimum diameter size of the through hole of the frustum-shaped cone in the cuboid.

[0011] In a preferred embodiment, the present invention can be further configured such that: two limiting rods are slidably inserted inside the first circular tube, and a third fixing plate is fixedly disposed on the side of each second fixing plate away from the arc-shaped through hole, and a plurality of the first fixing plates and a plurality of the third fixing plates are located between the two limiting rods.

[0012] In a preferred embodiment, the present invention can be further configured as follows: the adjustment component includes two first square rods, and two first through holes are symmetrically opened on the side of the first round tube away from the base tube. The vertical cross-section of the first through hole is square, and the width of the vertical cross-section of the first through hole is adapted to the width of the vertical cross-section of the first square rod.

[0013] A square through hole is provided on one side of each of the third fixing plates, the shape of the first square rod is adapted to the shape of the square through hole, and the first square rod is directly facing the square through hole;

[0014] The first square rod and the first round tube are both provided with a lifting assembly.

[0015] In a preferred embodiment, the present invention can be further configured such that: the lifting component includes a second square rod, the vertical cross-sectional shape of the second square rod is the same as that of the first square rod, a connecting plate is fixedly provided at one end of the second square rod, and the first square rod is slidably connected to the corresponding connecting plate;

[0016] A first rotating rod is rotatably mounted on the second square rod. A first screw is fixedly mounted on one end of the first rotating rod. The first screw passes through the corresponding first square rod, and the first square rod is threadedly connected to the first screw.

[0017] In a preferred embodiment, the present invention may be further configured such that: a first limiting plate is fixed to the other end of each of the first screws, and the first square rod is located between the corresponding first rotating rod and the corresponding first limiting plate.

[0018] In a preferred embodiment, the present invention can be further configured such that: a connecting rod is fixedly provided at one end of each second square rod away from the connecting plate, and the other end of the connecting rod is fixed to the corresponding limiting rod;

[0019] Two second through holes are symmetrically opened on the other side of the first circular tube. The vertical cross-section of the second through hole is rectangular, and the width of the vertical cross-section of the second through hole is equal to the width of the vertical cross-section of the first through hole.

[0020] The vertical cross-section of the limiting rod is square, and the width of the vertical cross-section of the limiting rod is adapted to the width of the vertical cross-section of the second through hole;

[0021] The limiting rod is directly opposite the second through hole.

[0022] In a preferred embodiment, the present invention can be further configured as follows: two guide blocks are symmetrically fixedly arranged on the inner circumferential wall of the first circular tube, and a second placement groove is opened on the side of each guide block near the corresponding limiting rod. Both ends of the second placement groove pass through the corresponding guide block, and the vertical cross-sectional width of the second placement groove is adapted to the vertical cross-sectional width of the second square rod and the vertical cross-sectional width of the corresponding connecting rod.

[0023] Both the second square rod and the connecting rod pass through the corresponding second placement slot.

[0024] In a preferred embodiment, the present invention can be further configured such that: a first placement groove is provided on the side of each of the two second square rods away from the corresponding first square rod, and a scale is provided in the first placement groove.

[0025] In a preferred embodiment, the invention may be further configured such that the outer circumferential surface of the first circular tube is threaded.

[0026] In summary, the present invention has at least one of the following beneficial technical effects:

[0027] 1. By setting up several first fixed plates and adjustment components, operators can easily adjust the size of the discharge port according to actual needs, reducing preparation time and improving work efficiency.

[0028] 2. By setting a limiting rod, the limiting rod plays a role in limiting the position of several second fixed plates, preventing the position of the second fixed plates inside the first circular tube from changing.

[0029] 3. By setting up a lifting component, and ensuring that the movement distance L1 of the first square rod is 1.2 times that of L2, it is guaranteed that the second fixed plates after movement will not interfere with the telescopic tube coming out from the actual discharge port size, thus ensuring the feasibility of the device.

[0030] 4. By setting guide blocks, the range of motion of the first square rod is further confirmed, so that the first square rod can pass through the third fixed plate quickly and accurately during the movement. Attached Figure Description

[0031] Figure 1This is a schematic diagram of the overall half-section structure of this embodiment (neither of the two first square rods passes through the square through hole);

[0032] Figure 2 This is a schematic diagram of the overall half-section structure of this embodiment (one of the first square rods moves to the end and only the outermost square through hole is not passed through, while the other first square rod passes through part of the square through hole).

[0033] Figure 3 yes Figure 1 Right view structural schematic diagram of the first fixed plate in the middle;

[0034] Figure 4 yes Figure 1 Enlarged structural diagram at point A in the middle;

[0035] Figure 5 yes Figure 1 Enlarged structural diagram at point B;

[0036] Figure 6 yes Figure 1 Enlarged structural diagram at point C.

[0037] In the diagram, 1. Die head body; 11. Basic tube; 2. First round tube; 3. Tube diameter adjustment component; 31. First fixing plate; 32. Second fixing plate; 4. Adjustment component; 21. Limiting rod; 33. Third fixing plate; 41. First square rod; 42. First through hole; 43. Square through hole; 5. Lifting component; 51. Second square rod; 52. Connecting plate; 53. First rotating rod; 54. First screw; 55. First limiting plate; 6. Connecting rod; 61. Second through hole; 7. Guide block; 71. Second placement groove; 8. First placement groove; 81. Scale. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings.

[0039] Example:

[0040] Reference Figures 1-6 As shown, this invention discloses an adjustable die head for expanding heat shrink tubing, comprising a die head body 1. The die head body 1 includes a base tube 11 and an adjustment part. The adjustment part includes a first circular tube 2. One end of the first circular tube 2 is fixed to one end of the base tube 11. The opening size of one end of the first circular tube 2 is equal to the opening size of one end of the base tube 11, and the straight line containing the central axis of the first circular tube 2 is collinear with the straight line containing the central axis of the base tube 11.

[0041] A pipe diameter adjustment component 3 is provided inside the first circular pipe 2. The pipe diameter adjustment component 3 includes several first fixed plates 31. Figure 1The thickness of the first fixing plate 31 is for drawing purposes. In reality, the first fixing plate 31 is thin. The specific dimensions of the first fixing plate 31 are determined according to actual needs.

[0042] Several first fixed plates 31 are arranged together to form a cuboid.

[0043] Each first fixing plate 31 includes two second fixing plates 32 of the same shape. Each second fixing plate 32 has an arc-shaped through hole on one side, with one end of the arc-shaped through hole penetrating the corresponding second fixing plate 32.

[0044] When the two second fixing plates 32 in each first fixing plate 31 are spliced ​​together, the two arc-shaped through holes form a complete circle. The vertical cross-section of the inner hole of the first fixing plate 31 is in the shape of a frustum conical.

[0045] Several second fixing plates 32 are arranged sequentially according to the size of their circular holes. The vertical cross-section of the through hole inside the cuboid is shaped like a frustum of a cone. The circular holes on the contact side of two adjacent first fixing plates 31 have the same diameter.

[0046] The pipe diameter adjustment component 3 also includes an adjustment component 4, which changes the minimum diameter of the through hole of the truncated cone in the cuboid.

[0047] The adjusting assembly 4 includes two first square rods 41. The first through hole 42 has a square vertical cross-section. Two first through holes 42 are symmetrically opened on the side of the first circular tube 2 away from the main tube 11. The width of the vertical cross-section of the first through hole 42 is adapted to the width of the vertical cross-section of the first square rod 41. The first square rod 41 can pass through the first through hole 42, and the direction of movement of the first square rod 41 will not be skewed when passing through the first through hole 42.

[0048] Each second fixing plate 32 is fixedly provided with a third fixing plate 33 on the side away from the arc-shaped through hole.

[0049] A square through hole 43 is provided on one side of several third fixing plates 33. The shape of the first square rod 41 is adapted to the shape of the square through hole 43, and the first square rod 41 is directly opposite the square through hole 43.

[0050] During the movement, the first square rod 41 passes through a portion of the square through hole 43.

[0051] The first square rod 41 and the first round tube 2 are both equipped with a lifting component 5.

[0052] The lifting component 5 includes a second square rod 51. The vertical cross-sectional shape of the second square rod 51 is the same as that of the first square rod 41, and a connecting plate 52 is fixedly installed at one end of the second square rod 51. The first square rod 41 is slidably connected to the corresponding connecting plate 52. A groove is formed on one side of the connecting plate 52, and a sliding block is fixedly installed at one end of the first square rod 41. The sliding block is located in the groove and is slidably connected to the groove.

[0053] The first square rod 41 and the second square rod 51 are of the same length. When the first square rod 41 passes through the first through hole 42, the second square rod 51 also passes through the first through hole 42. The second square rod 51 further ensures that the first square rod 41 will not deviate in its direction of movement when passing through the first through hole 42. This, in turn, ensures that the first square rod 41 can pass through any square through hole 43.

[0054] A first rotating rod 53 is rotatably mounted on the second square rod 51. A first screw 54 is fixedly mounted on one end of the first rotating rod 53. The first screw 54 passes through the corresponding first square rod 41, and the first square rod 41 and the first screw 54 are threadedly connected.

[0055] The movement distance of the first square rod 41 is denoted as L1. The difference between the maximum and minimum radius dimensions of the inner hole of the cuboid is denoted as L2. L1 is 1.2 times L2.

[0056] Each first screw 54 has a first limiting plate 55 fixed at the other end, and the first square rod 41 is located between the corresponding first rotating rod 53 and the corresponding first limiting plate 55.

[0057] Two limiting rods 21 are slidably inserted inside the first circular tube 2. The first fixing plate 31 and several third fixing plates 33 are all located between the two limiting rods 21. The limiting rods 21 are always in contact with one side or part of one side of the corresponding several third fixing plates 33.

[0058] Each second square rod 51 has a connecting rod 6 fixedly installed at one end away from the connecting plate 52, and the other end of the connecting rod 6 is fixed to the corresponding limiting rod 21. When the first square rod 41 passes through part of the third fixing plate 33, the limiting plate does not contact this part of the third fixing plate 33.

[0059] Two second through holes 61 are symmetrically formed on the other side of the first circular tube 2. The vertical cross-section of the second through hole 61 is rectangular, and the width of the vertical cross-section of the second through hole 61 is equal to the width of the vertical cross-section of the first through hole 42. The vertical cross-section of the limiting rod 21 is square, and the width of the vertical cross-section of the limiting rod 21 is adapted to the width of the vertical cross-section of the second through hole 61.

[0060] The limiting rod 21 is directly opposite the corresponding second through hole 61. During the movement of the first square rod 41, the first square rod 41 drives the connecting plate 52 to move, the connecting plate 52 drives the second square rod 51 to move, the second square rod 51 drives the connecting rod 6 to move, and the connecting rod 6 drives the corresponding limiting rod 21 to move. Both the limiting rod 21 and the connecting rod 6 pass through the corresponding second through hole 61.

[0061] Two guide blocks 7 are symmetrically fixed to the inner circumferential wall of the first circular tube 2. Each guide block 7 has a second placement groove 71 on the side near the corresponding limiting rod 21. Both ends of the second placement groove 71 pass through the corresponding guide block 7. The vertical cross-sectional width of the second placement groove 71 matches the vertical cross-sectional width of the second square rod 51 and the corresponding connecting rod 6. Both the second square rod 51 and the connecting rod 6 pass through the corresponding second placement groove 71. The guide blocks 7 further correct the movement direction of the first square rod 41.

[0062] Each of the two second square rods 51 has a first placement groove 8 on the side away from the corresponding first square rod 41, and a scale 81 is installed in the first placement groove 8. The value on the scale 81 is the actual diameter of the discharge port.

[0063] When the first square rod 41 has not passed through any of the third fixed plates 33, the value on the scale 81 corresponding to one side surface of the first round tube 2 is the second smallest actual hole diameter value in the inner hole of the cuboid.

[0064] The maximum size of the discharge port is the second largest positive diameter value among the holes in the cuboid body.

[0065] When the first square rod 41 passes through part of the third fixed plate 33 and moves toward the corresponding second square rod 51, the distance the first square rod 41 moves is L1. At this time, the value on the scale 81 corresponding to one side surface of the first circular tube 2 is the minimum hole diameter value on several second fixed plates 32 that have not moved at this time.

[0066] The outer circumferential surface of the first circular tube 2 is threaded. A nut is screwed onto the outside of the first circular tube 2. The nut is hollow inside and open at both ends, with the opening size being equal to the opening size of the basic tube 11.

[0067] It should be noted that the processing workshop is a dust-free workshop, so there is no need to worry about impurities or dust entering the inner hole of the second fixing plate 32 through the first through hole 42, the second through hole 61, etc., and coming into contact with the heat shrink tubing.

[0068] The implementation principle of the above embodiments is as follows:

[0069] The telescopic tube enters from the end of the basic tube 11 away from the first circular tube 2 and exits from the other end of the first circular tube 2.

[0070] During the installation phase, the operator first places several first fixing plates 31 inside the first round tube 2.

[0071] Both sides of several first fixing plates 31 are in contact with the two inner walls of the first circular tube 2. This defines the left-right direction of the several first fixing plates 31 (from...). Figure 1 (From above). The first circular tube 2 also defines the front-rear direction of several first fixed plates 31 (from... Figure 1 (Let's take a look).

[0072] Next, the operator will pass the first square rod 41, the second square rod 51, the connecting rod 6 and the limiting rod 21 through the first through hole 42. When the other end of the limiting rod 21 is flush with the other side of the first round tube 2, the operator will stop moving the first square rod 41.

[0073] At this time, the operator presses down on the corresponding second fixing plates 32, so that the third fixing plate 33 is evenly positioned and the limiting rods 21 come into contact.

[0074] Similarly, another first square rod 41 is placed on the first circular tube 2 in the same manner as described above. At this time, the two corresponding second fixing plates 32 are in close contact. And the positions of several second fixing plates 32 are fixed inside the first circular tube 2. Similarly, the second fixing plates 32 at both ends are in contact with the inner wall of the first circular tube 2.

[0075] When the operator needs to select the actual orifice size of the discharge end as required, it should be noted that the actual size of the telescopic tube has specific specifications, and each size grade corresponds to the minimum orifice size on a different first fixed plate 31.

[0076] The operator first pushes the connecting plate 52, which causes the first square rod 41 and the second square rod 51 to move simultaneously. The first square rod 41 passes through part of the third fixed plate 33. The operator observes the scale 81 on the second square rod 51, and stops pushing the connecting plate 52 when it reaches the appropriate value.

[0077] The second square rod 51 drives the connecting rod 6 to move, and the connecting rod 6 drives the limiting rod 21 to move. The limiting rod 21 is always located above the third fixing plate 33 that the first square rod 41 has not passed through, thus fixing the remaining position of the third fixing plate 33 that has not been passed through by the first square rod 41.

[0078] Next, the operator rotates the first rotating rod 53, which drives the first screw 54 to rotate. The first screw 54 then drives the first square rod 41 to move a distance L1 and then stops.

[0079] Furthermore, since the first square rod 41 and the second square rod 51 are in close contact with the first through hole 42, the second square rod 51 is in close contact with the guide block 7, and the connecting rod 6 and the limiting rod 21 are in close contact with the second through hole 61, the external force exerted on the die head body 1 during actual production is relatively small, and the position of the first square rod 41 will not change during production.

[0080] It should be noted that the third fixing plate 33, which is closest to the basic tube 11, will never be passed through by the first square rod 41, and the limiting rod 21 will always be in contact with the third fixing plate 33.

[0081] When the outlet size does not need to be adjusted, that is, when the outlet size is the second smallest diameter in the inner hole of the cuboid, the operator can fully insert the first square rod 41 into several third fixing plates 33 except for the third fixing plate 33 closest to the basic tube 11.

[0082] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An adjustable die head for expanding heat shrink tubing, comprising a die head body (1), said die head body (1) including a base tube (11) and an adjustment section, characterized in that, The adjustment unit includes a first circular tube (2), two guide blocks (7) are symmetrically fixed on the inner circumferential wall of the first circular tube (2), and a pipe diameter adjustment component (3) is provided inside the first circular tube (2); The pipe diameter adjustment component (3) includes several first fixing plates (31), each of the first fixing plates (31) includes two second fixing plates (32) of the same shape, and each of the second fixing plates (32) has an arc-shaped through hole on one side, with one end of the arc-shaped through hole penetrating through the corresponding second fixing plate (32). When two second fixing plates (32) in each of the first fixing plates (31) are spliced ​​together, the two arc-shaped through holes form a complete circle. Several second fixing plates (32) are arranged in order according to the size of the diameter of the complete circle hole. Several second fixing plates (32) form a cuboid. The vertical cross section of the through hole inside the cuboid is in the shape of a frustum cone. The pipe diameter variation component (3) further includes an adjustment component (4), which changes the minimum diameter of the through hole of the frustum cone in the cuboid; Two limiting rods (21) are slidably inserted inside the first circular tube (2). A third fixing plate (33) is fixedly installed on the side of each second fixing plate (32) away from the arc-shaped through hole. Several first fixing plates (31) and several third fixing plates (33) are located between the two limiting rods (21). The adjustment component (4) includes two first square rods (41). The first round tube (2) has two first through holes (42) symmetrically opened on the side away from the basic tube (11). The vertical cross-section of the first through hole (42) is square, and the width of the vertical cross-section of the first through hole (42) is adapted to the width of the vertical cross-section of the first square rod (41). A square through hole (43) is provided on one side of each of the third fixing plates (33). The shape of the first square rod (41) is adapted to the shape of the square through hole (43), and the first square rod (41) is directly facing the square through hole (43). The first square rod (41) and the first round tube (2) are both provided with a lifting assembly (5); The lifting component (5) includes a second square rod (51), the vertical cross-sectional shape of the second square rod (51) is the same as that of the first square rod (41), and a connecting plate (52) is fixedly provided at one end of the second square rod (51). The first square rod (41) is slidably connected to the corresponding connecting plate (52). The second square rod (51) is rotatably provided with a first rotating rod (53), and a first screw (54) is fixedly provided at one end of the first rotating rod (53). The first screw (54) passes through the corresponding first square rod (41), and the first square rod (41) is threadedly connected to the first screw (54).

2. The adjustable die head for expanding heat shrink tubing according to claim 1, characterized in that: Each of the first screws (54) has a first limiting plate (55) fixed at the other end, and the first square rod (41) is located between the corresponding first rotating rod (53) and the corresponding first limiting plate (55).

3. An adjustable die head for expanding heat shrink tubing according to claim 2, characterized in that: Each of the second square rods (51) has a connecting rod (6) fixedly provided at one end away from the connecting plate (52), and the other end of the connecting rod (6) is fixed to the corresponding limiting rod (21); Two second through holes (61) are symmetrically opened on the other side of the first circular tube (2). The vertical cross-section of the second through hole (61) is rectangular, and the width of the vertical cross-section of the second through hole (61) is equal to the width of the vertical cross-section of the first through hole (42). The vertical section of the limiting rod (21) is square, and the width of the vertical section of the limiting rod (21) is adapted to the width of the vertical section of the second through hole (61); The limiting rod (21) is directly opposite the second through hole (61).

4. An adjustable die for expanding heat shrink tubing according to claim 3, characterized in that: Each of the two guide blocks (7) has a second placement groove (71) on the side near the corresponding limiting rod (21). Both ends of the second placement groove (71) pass through the corresponding guide block (7). The vertical cross-sectional width of the second placement groove (71) is adapted to the vertical cross-sectional width of the second square rod (51) and the vertical cross-sectional width of the corresponding connecting rod (6). The second square rod (51) and the connecting rod (6) both pass through the corresponding second placement slot (71).

5. An adjustable die for expanding heat shrink tubing according to claim 4, characterized in that: Each of the two second square rods (51) has a first placement groove (8) on the side away from the corresponding first square rod (41), and a scale (81) is provided in the first placement groove (8).

6. An adjustable die for expanding heat shrink tubing according to claim 5, characterized in that: The outer circumferential surface of the first round tube (2) is machined with threads.

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