A wrapping packaging machine

Abstract

This invention relates to the field of product packaging technology, specifically to a stretch wrapping machine. It includes a stretching mechanism, positioned above a support, comprising a stretch film for wrapping the product; and a cutting mechanism, positioned above the support and below the product. The cutting mechanism includes a rotatably mounted cutter carrier and a pressure roller. The cutter carrier has a cutter at its top and a pushing component on one side. Both the cutter carrier and the pressure roller have a first rotational position and a second rotational position. In this stretch wrapping machine, by setting the cutter and pressure roller to rotate relative to each other, the pressure roller presses the stretch film downwards, creating a distance between the portion of the stretch film to be cut and the product. This increased distance improves the tension of the stretch film, thereby preventing the cutting of multiple layers of stretch film and reducing the occurrence of insufficient tension.

Description

Technical Field

[0001] This invention relates to the field of product packaging technology, and more specifically, to a stretch wrapping machine. Background Technology

[0002] Stretch wrapping machines use a C-shaped rotating coil to drive the stretch film to rotate around the product, thus wrapping the goods. Stretch wrapping machines are used for wrapping single items or combinations of items, and are suitable for industries such as building materials, casting, wire and cable, auto parts, and chemicals. Goods wrapped with stretch film are more secure, aesthetically pleasing, and neat, and also provide waterproofing, dustproofing, spill prevention, theft prevention, and facilitate loading and unloading.

[0003] In the existing packaging process, the product is usually stacked on a conveyor belt and then enters the stretch film station. The servo motor of the stretch film starts to work and drags the stretch film to count and wrap the product according to the set number of turns. When the stretch film is wrapped as required, the system will enter the film cutting stage, which is usually driven by a cylinder to cut the wrapped film.

[0004] In practice, if the cutter is located directly below the product, the cutter can easily cut all the layers of the wrapped film because they are tightly bonded together. If the cutter is located on the side of the product, the tension of the film is insufficient because one end of the film is not restricted. When the tension of the film is insufficient, the cutter will have difficulty cutting it. Summary of the Invention

[0005] The purpose of this invention is to provide a wrapping machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, a stretch wrapping machine is provided, including a stretching mechanism disposed above a support, and including a stretch film for wrapping the stretch film around the product;

[0007] A cutting mechanism is disposed above the support and below the product; the cutting mechanism includes a rotatably disposed cutter carrier and a pressure roller, the cutter carrier is provided with a cutter on the top and a pushing component on one side; both the cutter carrier and the pressure roller have a first rotation position and a second rotation position;

[0008] In the first rotation position, both the cutter carrier and the pressure roller are far away from the product; in the second rotation position, the pressure roller approaches the product in a downward rotation manner and presses the stretch film downward, creating a distance between the part of the stretch film to be cut and the product; the cutter carrier drives the cutter and the pushing component to approach the product in an upward rotation manner, so that the pushing component abuts against the bottom of the product, causing the cutter to cut the part of the stretch film that has been pressed down.

[0009] A drive mechanism configured to drive the cutter carrier and pressure roller to switch between a first rotational position and a second rotational position.

[0010] As a further improvement to this technical solution, the winding mechanism includes a C-shaped moving ring fixedly disposed on one side plate at the top of the rotating roller and rotatably disposed on one side of the side plate; an opening is provided on one side of the side plate to allow the product to enter;

[0011] The C-shaped moving coil is rotatably connected to the winding film on the side away from the side plate;

[0012] The outer and inner rings of the C-shaped moving coil are equipped with multiple drive wheels driven by servo motors.

[0013] As a further improvement to this technical solution, the pushing component includes a third cylinder fixedly disposed on one side of the cutter carrier, and a top block is fixedly connected to the movable end of the top of the third cylinder;

[0014] The top block is made of sponge material.

[0015] As a further improvement to this technical solution, the driving mechanism includes a base fixedly mounted on the top of the bracket, and a fixed shaft is provided at one end of the base;

[0016] The cutter carrier is rotatably mounted on the outer ring of the fixed shaft, and a first cylinder is rotatably mounted between the bottom end of the cutter carrier and the top of the base.

[0017] The outer ring of the fixed shaft is rotatably fitted with a rotating block at one end that is rotatably connected to the pressure roller, and a second cylinder is rotatably arranged between the bottom end of the rotating block and the top of the base.

[0018] As a further improvement to this technical solution, a limiting block is fixedly connected to the side of the cutter carrier away from the pushing component. The limiting block is located on the path where the pressure roller presses the wrapping film downward, so that the pressure roller and the limiting block cooperate to clamp and limit the pressed wrapping film.

[0019] The top of the limiting block is provided with a movable plate, and a connecting spring is provided between the movable plate and the limiting block to elastically connect the two.

[0020] As a further improvement to this technical solution, the cutter carrier is provided with a sliding cavity that extends through the top, and a blade box is slidably disposed in the sliding cavity;

[0021] An elastic element is provided between one end of the blade box and the sliding cavity to elastically connect the two.

[0022] The cutter is longitudinally and elastically positioned within the blade box;

[0023] A limiting mechanism is provided between the cutter carrier and the first cylinder. When the cutter carrier rotates downward, the blade box uses the driving force generated by the rotation of the cutter carrier to overcome the elastic force of the elastic element, causing the blade box to move to the limiting mechanism and be limited by the limiting mechanism. When the cutter moves downward, the limiting mechanism disengages from the blade box, so that the elastic element drives the cutter to move at the bottom of the wrapping film through its own elastic force, so as to perform secondary cutting on the wrapping film.

[0024] As a further improvement to this technical solution, a placement cavity is provided inside the blade box, and the placement cavity extends through the top of the blade box so that the cutting blade can slide into the placement cavity;

[0025] The bottom of the cutter is fixedly connected to a base plate that is slidably disposed in the placement cavity, and a compression spring is provided between the bottom end of the base plate and the bottom of the placement cavity to elastically connect the two.

[0026] As a further improvement to this technical solution, the limiting mechanism includes a pin with one end sliding into the sliding cavity and the other end having a return spring between it and the side wall of the cutter carrier, as well as an insertion port that passes through one side of the blade box.

[0027] The socket and the pin are provided to correspond to each other so that the pin can extend into the socket;

[0028] A protrusion that slides longitudinally within the socket is fixedly provided on one side of the base plate. The bottom end of the protrusion is inclined. When the cutter moves the protrusion downward through the base plate, the protrusion pushes the pin out of the socket through the inclined surface at its bottom.

[0029] The insertion port is located in the middle of the blade box.

[0030] As a further improvement to this technical solution, the driving force generated by the rotation of the cutter carrier is the weight of the blade box itself, and the weight of the blade box is greater than the elastic force of the elastic element.

[0031] As a further improvement to this technical solution, a convex shaft is longitudinally slidably provided on one side of the rotating block. One end of the convex shaft passes through the pressure roller and is rotatably connected to the pressure roller. A side arm is fixedly provided at the bottom of one end of the convex shaft. One end of the side arm extends to the side wall of the cutter and protrudes upward to form a protrusion. The two sides of the protrusion are arc-shaped structures. A convex column is fixedly connected to the side wall of the cutter.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] 1. In this stretch wrapping machine, by setting the cutter and pressure roller to rotate relative to each other, the pressure roller presses the stretch film downward, creating a distance between the part of the stretch film to be cut and the product. By increasing the distance, the tension of the stretch film is increased, thereby avoiding cutting multiple layers of stretch film and reducing the occurrence of insufficient tension.

[0034] 2. In this stretch wrapping machine, the cutter carrier changes the position of the cutter by rotating. This not only does not affect the wrapping mechanism's wrapping of the product, but also drives the cutter to move during rotation, allowing the cutter to move at the bottom of the stretch film, thereby achieving secondary cutting of the stretch film and improving the cutting efficiency of the stretch film.

[0035] 3. In this stretch wrapping machine, a sliding pressure roller is combined with a cutter, so that the cutter can drive the pressure roller to move downward during the movement, so that the pressure roller can further press the stretch film, thereby increasing the tension of the stretch film during the movement of the cutter and increasing the probability of the cutter cutting the stretch film. Attached Figure Description

[0036] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 This is a schematic diagram of the winding mechanism of the present invention. Figure 1 ;

[0038] Figure 3 This is a schematic diagram of the winding mechanism of the present invention. Figure 2 ;

[0039] Figure 4 This is a schematic diagram of the cutting mechanism of the present invention;

[0040] Figure 5 This is a schematic diagram of the structure of the jacking component of the present invention;

[0041] Figure 6 This is a cross-sectional structural diagram of the cutter carrier of the present invention;

[0042] Figure 7 This is a cross-sectional structural diagram of the blade box of the present invention;

[0043] Figure 8 This is a schematic diagram of the connector structure of the present invention;

[0044] Figure 9 This is a schematic diagram of the working state of the cutter of the present invention. Figure 1 ;

[0045] Figure 10 This is a schematic diagram of the working state of the cutter of the present invention. Figure 2 ;

[0046] Figure 11This is a schematic diagram of the convex shaft of the present invention;

[0047] Figure 12 For the present invention Figure 11 An enlarged schematic diagram of the structure at point A.

[0048] The meanings of the labels in the diagram are as follows:

[0049] 100. Support; 101. Rotary roller; 110. Winding mechanism; 111. Side plate; 112. C-shaped moving coil; 113. Stretch film; 114. Drive wheel; 115. Driven wheel; 116. Belt; 117. Servo motor; 118. Outer cover; 120. Cutting mechanism; 121. Base; 122. Fixed shaft; 123. Cutter carrier; 124. Rotating block; 125. First cylinder; 126. Second cylinder; 127. Cutter; 128. Convex Shaft; 129, Pressure roller; 130, Pushing component; 131, Third cylinder; 132, Top block; 133, Limiting block; 134, Movable plate; 140, Sliding cavity; 141, Elastic element; 150, Blade box; 151, Placement cavity; 152, Base plate; 153, Compression spring; 154, Insert; 155, Protrusion; 160, Pin; 161, Return spring; 170, Side arm; 171, Protrusion; 172, Protruding column; 200, Product. Detailed Implementation

[0050] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0053] See also Figure 1 As shown, a wrapping machine is provided, including a wrapping mechanism 110 and a cutting mechanism 120 disposed above a support 100, wherein the support 100 is composed of multiple square tubes welded together. Figure 2 As shown, the winding mechanism 110 mainly consists of a side plate 111 fixedly mounted at one end of the top of the bracket 100 and a C-shaped moving coil 112 rotatably mounted on one side of the side plate 111. The side plate 111 is shaped like a "C" similar to the C-shaped moving coil 112, specifically with an opening on one side for the product 200 to enter. A stretch film 113 is rotatably connected to the side of the C-shaped moving coil 112 away from the side plate 111. Thus, when the product 200 is located within the opening of the side plate 111, driving the C-shaped moving coil 112 to rotate causes the stretch film 113 to rotate around the product 200, thereby completing the winding of the product 200.

[0054] The method of driving the C-shaped moving coil 112 to rotate is consistent with the prior art. For example, Figure 2 In the process, multiple drive wheels 114 are arranged on the outer and inner rings of the C-shaped moving coil 112. The sidewalls of the drive wheels 114 contact the sidewalls of the C-shaped moving coil 112, and then, as... Figure 3 As shown, multiple driven pulleys 115 are coaxially fixedly connected to the drive wheel 114 on the other side of the side plate 111. A belt 116 is wound between the driven pulleys 115, and one end of the belt 116 is connected to a servo motor 117 mounted on the side wall of the side plate 111. In this way, the servo motor 117 drives the belt 116 to rotate, and the belt 116 drives the drive wheel 114 to rotate through the driven pulleys 115. The drive wheel 114 drives the C-shaped moving coil 112 to rotate. In addition, an outer cover 118 is provided on the side of the side plate 111 located on the side of the belt 116 to prevent external objects from affecting the operation of the belt 116.

[0055] In the above description, a rotating roller 101 is rotatably mounted on the top of the support 100. The rotation of the rotating roller 101 conveys the product 200 to the next process. One or more rotating rollers 101 can be provided. When only one rotating roller 101 is provided, two wrapping machines are required to cooperate, with each wrapping machine having one rotating roller 101, thus providing support for both ends of the product 200. When multiple rotating rollers 101 are provided, they are distributed at both ends of the top of the support 100, which also provides support for both ends of the product 200.

[0056] The cutting mechanism 120 is located below the product 200, such as... Figure 4 As shown, the cutting mechanism 120 includes a rotatably mounted cutter carrier 123 and a pressure roller 129. A cutter 127 is mounted on the top of the cutter carrier 123, and a pushing member 130 is mounted on one side. Both the cutter carrier 123 and the pressure roller 129 have a first rotational position and a second rotational position. In the first rotational position, both the cutter carrier 123 and the pressure roller 129 are away from the product 200. In the second rotational position, the pressure roller 129 approaches the product 200 in a downward rotating manner and presses the stretch film 113 downward, creating a distance between the part of the stretch film 113 to be cut and the product 200. The cutter carrier 123 drives the cutter 127 and the pushing member 130 to approach the product 200 in an upward rotating manner, so that the pushing member 130 abuts against the bottom of the product 200, and the cutter 127 cuts the pressed part of the stretch film 113.

[0057] Furthermore, it also includes a drive mechanism configured to drive the cutter carrier 123 and the pressure roller 129 to switch between a first rotational position and a second rotational position.

[0058] In other words, by setting the cutter 127 and the pressure roller 129 to rotate relative to each other, the pressure roller 129 presses the stretch film 113 downward, creating a distance between the part of the stretch film 113 that needs to be cut and the product 200. This increased distance increases the tension of the stretch film 113, thereby avoiding cutting the multi-layer stretch film 113 and reducing the occurrence of insufficient tension.

[0059] like Figure 5 As shown, the actuating component 130 includes a third cylinder 131 fixedly disposed on one side of the cutter carrier 123. A top block 132 is fixedly connected to the movable end of the top of the third cylinder 131. The top block 132 is preferably made of sponge material. Sponge is soft and can reduce damage to the wrapping film 113.

[0060] like Figure 4As shown, the drive mechanism includes a base 121 fixedly mounted on the top of the bracket 100. Uprights are fixedly mounted on both sides of one end of the base 121. A fixed shaft 122 is fixedly connected between the two uprights. A cutter carrier 123 is rotatably mounted on the outer ring of the fixed shaft 122. A first cylinder 125 is rotatably mounted between the bottom end of the cutter carrier 123 and the top of the base 121. A rotating block 124 with one end rotatably connected to the pressure roller 129 is rotatably mounted on the outer ring of the fixed shaft 122. A second cylinder 126 is rotatably mounted between the bottom end of the rotating block 124 and the top of the base 121.

[0061] Furthermore, in Figure 5 In the middle, the cutter carrier 123 is fixedly connected to the side away from the third cylinder 131 with a limiting block 133. The limiting block 133 is located on the path of the pressure roller 129 pressing the wrapping film 113 downward, so that the pressure roller 129 and the limiting block 133 cooperate to clamp and limit the pressed wrapping film 113.

[0062] Working principle:

[0063] Figure 9 The diagram shows the state of the cutter 127 and pressure roller 129 (i.e., the first rotational position) when the winding mechanism 110 is winding the product 200. In this state, the cutter 127 and pressure roller 129 do not affect the winding mechanism 110's winding of the product 200. When the product 200 is finished winding, the cutter carrier 123 is rotated upward by controlling the extension of the first cylinder 125, and the rotating block 124 is rotated downward by controlling the retraction of the second cylinder 126. Then, as... Figure 10 As shown, Figure 10 The diagram shows the state of the cutter 127 and pressure roller 129 when the product 200 is fully wrapped (i.e., the second rotation position). When the pressure roller 129 rotates downward, it presses the wrapping film 113 downward. When the cutter carrier 123 drives the cutter 127, the limiting block 133, and the top block 132 to rotate upward, the third cylinder 131 drives the top block 132 to move upward, thereby limiting the wrapping film 113 at the bottom of the product 200. Since the top block 132 is made of compressible sponge material, the cutter carrier 123 can continue to drive the cutter 127 and the limiting block 133 to move upward. At this time, the cutter 127 moves upward and cuts the wrapping film 113.

[0064] Furthermore, to increase the tension of the stretch film 113 when it is pressed, a movable plate 134 is provided on the top of the limiting block 133, and a connecting spring is provided between the movable plate 134 and the limiting block 133 to elastically connect the two. In this way, when the cutter carrier 123 rotates upward, the movable plate 134 first presses the stretch film 113 against the bottom of the pressure roller 129. At this time, the movable plate 134 and the pressure roller 129 clamp and fix the stretch film 113. At this time, when the cutter 127 moves upward and contacts the stretch film 113, one end of the stretch film 113 is restricted by the pressure roller 129 and the movable plate 134, and the other end is restricted by the top block 132, thereby increasing the tension of the stretch film 113 when it is pressed.

[0065] Considering that the sharpness of the cutter 127 will decrease after prolonged use, making it difficult to cut the stretch film 113, therefore... Figure 6 As shown, the cutter carrier 123 has a sliding cavity 140 extending through the top. A blade box 150 is laterally slidable within the sliding cavity 140. The blade box 150 is connected to one end of the sliding cavity 140 by an elastic element 141, such as an elastic rope or a mounting spring. The cutter 127 is longitudinally elastically positioned within the blade box 150. A limiting mechanism is provided between the cutter carrier 123 and the first cylinder 125. When the cutter carrier 123 rotates downwards, the blade box 150 uses the driving force generated by the rotation of the cutter carrier 123 to overcome the elastic force of the elastic element 141, causing the blade box 150 to move to the limiting mechanism and be limited by it. When the cutter 127 moves downwards, the limiting mechanism disengages from the blade box 150, allowing the elastic element 141 to drive the cutter 127 to move at the bottom of the stretch film 113 through its own elastic force, thus performing a secondary cut on the stretch film 113.

[0066] Specifically, such as Figure 7 As shown, a placement cavity 151 is provided inside the blade box 150, extending through the top of the blade box 150, so that the cutter 127 can slide into the placement cavity 151. A base plate 152 is fixedly connected to the bottom of the cutter 127 and slidably disposed in the placement cavity 151. A compression spring 153 is provided between the bottom end of the base plate 152 and the bottom of the placement cavity 151 to elastically connect the two.

[0067] Combination Figures 6-8As shown, the limiting mechanism includes a pin 160 with one end sliding into the sliding cavity 140 and the other end having a return spring 161 between it and the side wall of the cutter carrier 123, and an insertion port 154 through one side of the blade box 150; the insertion port 154 is correspondingly arranged with the pin 160 so that the pin 160 extends into the insertion port 154; a protrusion 155 is fixedly arranged on one side of the base plate 152 and slides longitudinally in the insertion port 154. The bottom end of the protrusion 155 is inclined. When the cutter 127 moves the protrusion 155 downward through the base plate 152, the protrusion 155 pushes the pin 160 out of the insertion port 154 through the inclined surface of its bottom. Meanwhile, the socket 154 is preferably located in the middle of the blade box 150. In this way, when the pin 160 is disengaged from the socket 154, the end of the pin 160 still abuts against the side wall of the blade box 150, so that when the socket 154 moves to the front of the pin 160, the pin 160 can quickly enter the socket 154.

[0068] Furthermore, with Figure 8 Based on the state of the central socket 154, rotating rollers can also be provided on both sides of the socket 154. The rollers can reduce the friction between the pin 160 and the socket 154, thereby facilitating the protrusion 155 to push the pin 160.

[0069] As mentioned above, the blade box 150 utilizes the driving force generated by the rotation of the cutter carrier 123 to overcome the elastic force of the elastic element 141. This driving force can be the centrifugal force generated by the rotation of the cutter carrier 123. Specifically, by controlling the cutter carrier 123 to rotate rapidly downwards, the resulting centrifugal force is greater than the elastic force of the elastic element 141. Under the action of this centrifugal force, the blade box 150 is thrown to one end of the sliding cavity 140. Alternatively, the driving force generated by the rotation of the cutter carrier 123 can also be the weight of the blade box 150 itself, meaning the weight of the blade box 150 is greater than the elastic force of the elastic element 141. Thus, when the cutter carrier 123 rotates downwards, the blade box 150 pulls the elastic element 141 through its own weight, thereby moving towards one end of the sliding cavity 140.

[0070] To improve the smoothness of the blade holder 150's movement, the outer ring of the blade holder 150 is equipped with rollers (such as...). Figure 7 (As shown).

[0071] Working principle:

[0072] As the cutter carrier 123 rotates downward, the blade box 150 overcomes the elastic force of the elastic element 141 through centrifugal force or gravity, causing the blade box 150 to move towards one end of the sliding cavity 140. When the insertion port 154 moves to the front of the pin 160, the return spring 161 elastically drives the pin 160 into the insertion port 154, thereby limiting the blade box 150 and causing the elastic element 141 to stretch.

[0073] When the sharpness of the cutter 127 decreases, if the cutter 127 fails to cut the stretch film 113, the collision between the cutter 127 and the stretch film 113 will compress the compression spring 153. At this time, the compression spring 153 will cause the base plate 152 to move downward. The downward movement of the base plate 152 will cause the protrusion 155 to move downward. The protrusion 155 will push the pin 160 out of the socket 154 through its own inclined surface. When the pin 160 is disengaged from the socket 154, the pin 160 will stop limiting the blade box 150. At this time, the elastic element 141 will rebound instantly, causing the blade box 150 to move. The movement of the blade box 150 will cause the cutter 127 to move at the bottom of the stretch film 113, thereby performing a secondary cut on the stretch film 113.

[0074] Furthermore, the working mode of the blade box 150 can be changed by controlling the elasticity of the compression spring 153. For example, if the elasticity of the compression spring 153 is set to be small, the compression spring 153 will be compressed whenever the cutter 127 comes into contact with the stretch film 113, so that the blade box 150 will drive the cutter 127 to move at the bottom of the stretch film 113 every time the cutter 127 comes into contact with the stretch film 113.

[0075] Therefore, by rotating, the cutter carrier 123 changes the position of the cutter 127, which not only does not affect the winding mechanism 110 winding the product 200, but also drives the cutter 127 to move during the rotation, so that the cutter 127 can move at the bottom of the wrapping film 113, thereby achieving secondary cutting of the wrapping film 113 and improving the cutting efficiency of the wrapping film 113.

[0076] Not only that, such as Figure 11 and Figure 12 As shown, a convex shaft 128 is longitudinally slidably provided on one side of the rotating block 124. One end of the convex shaft 128 passes through the pressure roller 129 and is rotatably connected to the pressure roller 129. A side arm 170 is fixedly provided at the bottom of one end of the convex shaft 128. One end of the side arm 170 extends to the side wall of the cutter 127 and protrudes upward to form a protrusion 171. The two sides of the protrusion 171 are arc-shaped structures. A protruding post 172 is fixedly connected to the side wall of the cutter 127. In this way, when the cutter 127 moves, the cutter 127 will drive the protruding post 172 to move. The movement of the protruding post 172 abuts the side arm 170 downward through the arc surfaces on both sides of the protrusion 171. The downward movement of the side arm 170 drives the convex shaft 128 and the pressure roller 129 to move downward. The downward movement of the pressure roller 129 presses the movable plate 134 downward, thereby causing the pressure roller 129 to further press down on the stretch film 113 and increase the tension of the stretch film 113 during the movement of the cutter 127.

[0077] In other words, the sliding pressure roller 129 is combined with the cutter 127 so that the cutter 127 can drive the pressure roller 129 to move downward during the movement, so that the pressure roller 129 can further press the stretch film 113, thereby increasing the tension of the stretch film 113 during the movement of the cutter 127 and increasing the probability that the cutter 127 will cut the stretch film 113.

[0078] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stretch wrapping machine, characterized in that: include A winding mechanism (110), disposed above a support (100), includes a stretch film (113) for winding the stretch film (113) onto the product (200); A cutting mechanism (120) is disposed above the support (100) and below the product (200); the cutting mechanism (120) includes a rotatably disposed cutter carrier (123) and a pressure roller (129), a cutter (127) is disposed on the top of the cutter carrier (123), and a pushing member (130) is disposed on one side; both the cutter carrier (123) and the pressure roller (129) have a first rotation position and a second rotation position; In the first rotation position, both the cutter carrier (123) and the pressure roller (129) are far away from the product (200); in the second rotation position, the pressure roller (129) approaches the product (200) in a downward rotation manner and presses the stretch film (113) downward, creating a distance between the part of the stretch film (113) to be cut and the product (200); the cutter carrier (123) drives the cutter (127) and the pushing member (130) to approach the product (200) in an upward rotation manner, so that the pushing member (130) abuts against the bottom of the product (200), and the cutter (127) cuts the part of the stretch film (113) that is pressed down; A drive mechanism configured to drive the cutter carrier (123) and the pressure roller (129) to switch between a first rotational position and a second rotational position; The drive mechanism includes a base (121) fixedly mounted on the top of the bracket (100), and a fixed shaft (122) is provided at one end of the base (121). The cutter carrier (123) is rotatably disposed on the outer ring of the fixed shaft (122), and a first cylinder (125) is rotatably disposed between the bottom end of the cutter carrier (123) and the top of the base (121). The outer ring of the fixed shaft (122) is rotatably fitted with a rotating block (124) whose end is rotatably connected to the pressure roller (129). A second cylinder (126) is rotatably arranged between the bottom end of the rotating block (124) and the top of the base (121). The cutter carrier (123) has a sliding cavity (140) that extends through the top, and a blade box (150) is slidably disposed in the sliding cavity (140). An elastic element (141) is provided between one end of the blade box (150) and the sliding cavity (140) to elastically connect the two. The cutter (127) is longitudinally and elastically disposed within the blade box (150); A limiting mechanism is provided between the cutter carrier (123) and the first cylinder (125). When the cutter carrier (123) rotates downward, the blade box (150) uses the driving force generated by the rotation of the cutter carrier (123) to overcome the elastic force of the elastic member (141), so that the blade box (150) moves to the limiting mechanism and is limited by the limiting mechanism. When the cutter (127) moves downward, the limiting mechanism disengages from the blade box (150), so that the elastic member (141) drives the cutter (127) to move at the bottom of the wrapping film (113) through its own elastic force, so as to perform secondary cutting on the wrapping film (113).

2. The wrapping machine according to claim 1, characterized in that: The winding mechanism (110) includes a side plate (111) fixedly disposed at one end of the top of the roller (101) and a C-shaped moving coil (112) rotatably disposed on one side of the side plate (111); an opening is provided on one side of the side plate (111) to allow the product (200) to enter; The C-shaped moving coil (112) is rotatably connected to the winding film (113) on the side away from the side plate (111). The outer and inner rings of the C-shaped moving ring (112) are provided with multiple drive wheels (114) driven by servo motors (117).

3. The wrapping machine according to claim 1, characterized in that: The top moving component (130) includes a third cylinder (131) fixedly disposed on one side of the cutter carrier (123), and a top block (132) is fixedly connected to the movable end of the top of the third cylinder (131). The top block (132) is made of sponge material.

4. The stretch wrapping machine according to claim 1, characterized in that: The cutter carrier (123) is fixedly connected to a limiting block (133) on the side away from the top moving part (130). The limiting block (133) is located on the path of the pressure roller (129) pressing the wrapping film (113) downward, so that the pressure roller (129) and the limiting block (133) cooperate to clamp and limit the pressed wrapping film (113). The top of the limiting block (133) is provided with a movable plate (134), and a connecting spring is provided between the movable plate (134) and the limiting block (133) to elastically connect the two.

5. The wrapping machine according to claim 1, characterized in that: The blade box (150) has a placement cavity (151) inside, and the placement cavity (151) extends through the top of the blade box (150) so that the cutter (127) can slide into the placement cavity (151); The bottom of the cutter (127) is fixedly connected to a base plate (152) that is slidably disposed in the placement cavity (151). A compression spring (153) is provided between the bottom end of the base plate (152) and the bottom of the placement cavity (151) to elastically connect the two.

6. The wrapping machine according to claim 5, characterized in that: The limiting mechanism includes a pin (160) with one end sliding into the sliding cavity (140) and the other end being provided with a return spring (161) between it and the side wall of the cutter carrier (123), as well as an insertion port (154) provided through one side of the blade box (150). The socket (154) and the pin (160) are respectively provided so that the pin (160) extends into the socket (154); A protrusion (155) is fixedly provided on one side of the base plate (152) and slides longitudinally in the socket (154). The bottom end of the protrusion (155) is inclined. When the cutter (127) moves the protrusion (155) downward through the base plate (152), the protrusion (155) pushes the pin (160) out of the socket (154) through the inclined surface of its bottom. The socket (154) is located in the middle of the blade box (150).

7. The wrapping machine according to claim 1, characterized in that: The driving force generated by the rotation of the cutter carrier (123) is the weight of the blade box (150) itself, and the weight of the blade box (150) is greater than the elastic force of the elastic element (141).

8. The wrapping machine according to claim 1, characterized in that: A convex shaft (128) is longitudinally slidably provided on one side of the rotating block (124). One end of the convex shaft (128) passes through the pressure roller (129) and is rotatably connected to the pressure roller (129). A side arm (170) is fixedly provided at the bottom of one end of the convex shaft (128). One end of the side arm (170) extends to the side wall of the cutter (127) and protrudes upward to form a protrusion (171). The two sides of the protrusion (171) are arc-shaped structures. A protruding column (172) is fixedly connected to the side wall of the cutter (127).

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