Toothpaste tube closure device

Abstract

The utility model provides a toothpaste tube seal tail device, include: frame, pre -clamping mechanism sets up on the frame, and pre -clamping mechanism includes two pre -clamping spare, and two pre -clamping spare can be close to each other or far away, to pre -clamping toothpaste tube close to the position of tail portion, seal tail clamping mechanism sets up on the frame, and seal tail clamping mechanism includes the first execution subassembly and second execution subassembly of opposite setting, ultrasonic wave vibration subassembly is connected with the output of first execution subassembly, and ultrasonic wave vibration subassembly includes ultrasonic wave welding head, mould clamping subassembly is connected with the output of second execution subassembly, and mould clamping subassembly includes seal tail mould block, and ultrasonic wave welding head and seal tail mould block move to each other, to carry out clamping to the tail end of toothpaste tube. The utility model discloses two stages coordination through pre -clamping and seal tail clamping, realizes accurate pre -positioning after final clamping again, has solved the problem of clamping position inaccuracy, has promoted seal tail quality and consistency.

Description

Technical Field

[0001] This utility model relates to the technical field of toothpaste tube sealing equipment, and in particular to a toothpaste tube sealing device. Background Technology

[0002] Traditional toothpaste tube sealing devices typically use a single clamping method to clamp the end of the tube before an ultrasonic sealing mechanism completes the sealing. However, this traditional method has the following drawbacks: the toothpaste tube may deviate in position during transport, and the single clamping method cannot pre-position the tube before sealing, resulting in inconsistent clamping positions and unstable sealing quality. Furthermore, the clamping position of traditional clamping mechanisms is not adjustable, making it difficult to adapt to the sealing requirements of different toothpaste tube sizes. In addition, for toothpaste tubes with a tube-within-a-tube structure, the inner and outer tube ends need to be stretched and shaped before sealing; traditional devices lack corresponding shaping mechanisms, making it difficult to guarantee consistent sealing quality for this type of toothpaste tube. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned problems in the prior art and provide a toothpaste tube sealing device that can pre-position the toothpaste tube through a pre-clamping mechanism and then finally clamp the end of the toothpaste tube through a sealing clamping mechanism, thereby effectively improving the sealing quality and stability.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a toothpaste tube sealing device, characterized in that it comprises: frame; A pre-clamping mechanism is provided on the frame. The pre-clamping mechanism includes two symmetrically arranged pre-clamping members. The two pre-clamping members can move closer to or further away from each other to pre-clamp the toothpaste tube near the tail end. A tail-sealing clamping mechanism is disposed on the frame and located above the pre-clamping mechanism. The tail-sealing clamping mechanism includes a first execution component and a second execution component disposed opposite to each other. An ultrasonic vibration assembly is connected to the output end of the first actuating component, and the ultrasonic vibration assembly includes an ultrasonic welding head. A mold clamping assembly is connected to the output end of the second actuation assembly, and the mold clamping assembly includes a sealing mold block; The first actuator drives the ultrasonic welding head, and the second actuator drives the sealing mold block. The ultrasonic welding head and the sealing mold block move towards each other to clamp the tail end of the toothpaste tube.

[0005] The beneficial effects of this utility model are as follows: By setting a pre-clamping mechanism and a tail-sealing clamping mechanism, the pre-clamping mechanism pre-clamps and positions the toothpaste tube near the tail, and the tail-sealing clamping mechanism then clamps the end of the toothpaste tube. This achieves graded clamping—first pre-positioning and then final clamping—effectively solving the technical problems of inaccurate clamping position and unstable tail-sealing quality under the traditional single clamping method, and significantly improving the tail-sealing quality and consistency. Attached Figure Description

[0006] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0007] Figure 1 This is an isometric view of the overall structure of this utility model.

[0008] Figure 2 This is an isometric view of the overall structure of this utility model from another perspective.

[0009] Figure 3 This is a top view of the present invention.

[0010] Figure 4 This is a schematic diagram of the pre-clamping mechanism and the tail-closing clamping mechanism of this utility model.

[0011] Figure 5 This is a schematic diagram of the adjustment component structure of this utility model.

[0012] Figure 6 yes Figure 5 A magnified view of a portion of point A in the middle.

[0013] Figure 7 This is a schematic diagram of the structure of the ultrasonic vibration component and the mold clamping component of this utility model.

[0014] Figure 8 This is an exploded view of the ultrasonic vibration component of this utility model.

[0015] Figure 9 This is a schematic diagram of the mold clamping assembly of this utility model.

[0016] Figure 10 This is a schematic diagram of the pressing mechanism of this utility model.

[0017] Explanation of reference numerals in the attached figures: 100. Frame; 110. Pre-clamping mechanism; 112. Pre-clamping shaft; 113. Pre-clamping block; 114. Pre-clamping cylinder; 115. Pre-clamping shaft fixing plate; 120. Adjustment assembly; 121. Horizontal adjustment assembly; 122. Horizontal guide rail; 123. First slider; 124. Second slider; 125. First lead screw and nut pair; 126. First adjusting handwheel; 127. Vertical adjustment assembly; 128. Vertical guide rail; 129. Third slider; 130. Second lead screw and nut pair; 131. Second adjusting handwheel; 132. Digital display; 140. Tail-sealing clamping mechanism; 141. First actuation assembly; 142. Second actuation assembly; 143. First clamping cylinder; 144. Second clamping cylinder; 145. First guide shaft; 146. Second guide shaft; 47. First linear bearing; 148. First guide shaft fixing plate; 149. Second guide shaft fixing plate; 150. Ultrasonic vibration assembly; 151. Ultrasonic welding head; 152. Amplitude rod; 153. Vibration sealing knife; 154. Mounting flange; 155. Adjusting flange; 156. Vibration assembly fixing plate; 157. Mold assembly fixing plate; 158. First limit bolt; 159. Second limit bolt; 160. Mold clamping assembly; 161. Sealing mold block; 162. Anti-slip teeth; 163. Mold mounting base; 180. Pressing mechanism; 181. Fixing base; 182. Pressing cylinder; 183. Pressing plate; 184. Second linear bearing; 185. Third guide shaft; 186. Positioning plate; 187. First positioning protrusion; 188. Second positioning protrusion. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] like Figures 1 to 10 As shown, this utility model provides a toothpaste tube sealing device, including a frame 100, a pre-clamping mechanism 110, a sealing clamping mechanism 140, an ultrasonic vibration component 150, a mold clamping component 160, and a pressing mechanism 180.

[0020] The frame 100 serves as the mounting base for the entire device and is fixedly installed on the production line. The pre-clamping mechanism 110, the tail-sealing clamping mechanism 140, and the pressing mechanism 180 are respectively fixedly installed on the frame 100.

[0021] like Figures 1 to 4As shown, the pre-clamping mechanism 110 is mounted on the frame 100 and is used to pre-clamp the toothpaste tube near its tail from both sides, achieving initial positioning of the toothpaste tube. The tail-sealing clamping mechanism 140 is mounted on the frame 100 and located above the pre-clamping mechanism 110, and is used to finally clamp the tail end of the toothpaste tube from both sides. The ultrasonic vibration assembly 150 is mounted on one side of the tail-sealing clamping mechanism 140 and is used to perform ultrasonic tail-sealing on the toothpaste tube after it has been clamped by the tail-sealing clamping mechanism 140. The mold clamping assembly 160 is mounted on the other side of the tail-sealing clamping mechanism 140 and is positioned opposite to the ultrasonic vibration assembly 150, and is used to clamp the toothpaste tube to cooperate with the ultrasonic vibration assembly 150 to complete the tail-sealing.

[0022] The pre-clamping mechanism 110 and the sealing clamping mechanism 140 are distributed vertically along the axial direction of the toothpaste tube. The pre-clamping mechanism 110 clamps the toothpaste tube near the tail end, i.e., slightly above the tail end, serving as a pre-positioning and initial fixation mechanism; the sealing clamping mechanism 140 clamps the tail end of the toothpaste tube, i.e., the sealing position, serving as a final precise positioning and secure clamping mechanism. Through this staged clamping method, with pre-positioning followed by final clamping, the positional accuracy and clamping stability of the toothpaste tube are effectively guaranteed during sealing.

[0023] like Figures 4 to 6 As shown, the pre-clamping mechanism 110 includes two pre-clamping shafts 112 symmetrically arranged on both sides of the toothpaste tube. The two pre-clamping shafts 112 can move closer to or further away from each other to pre-clamp the toothpaste tube near its tail end. The pre-clamping shafts 112 extend along the conveying direction of the toothpaste tube. Multiple pre-clamping blocks 113 are axially spaced on each pre-clamping shaft 112. In this embodiment, each pre-clamping shaft 112 has three pre-clamping blocks 113, evenly spaced axially. The pre-clamping blocks 113 on the two pre-clamping shafts 112 are arranged opposite each other, i.e., the pre-clamping blocks 113 on the left pre-clamping shaft 112 correspond one-to-one with the pre-clamping blocks 113 on the right pre-clamping shaft 112, and are opposite each other in the horizontal direction. When the two pre-clamping shafts 112 move closer to each other, the oppositely arranged pre-clamping blocks 113 clamp the sidewalls of the toothpaste tube from both sides, achieving pre-clamping and positioning of the toothpaste tube. By setting multiple pre-clamping blocks 113, multiple toothpaste tubes can be pre-clamped simultaneously, improving production efficiency.

[0024] The pre-clamping mechanism 110 also includes a pre-clamping cylinder 114, such as Figure 6As shown, the output end of the pre-clamping cylinder 114 is fixedly connected to the pre-clamping shaft 112 via the pre-clamping shaft fixing plate 115, so as to drive the two pre-clamping shafts 112 to move closer or further apart. In this embodiment, four pre-clamping cylinders 114 are provided, of which two pre-clamping cylinders 114 are connected to the left pre-clamping shaft 112, and the other two pre-clamping cylinders 114 are connected to the right pre-clamping shaft 112. During operation, the four pre-clamping cylinders 114 act synchronously, driving the two pre-clamping shafts 112 to move closer together, so that the pre-clamping block 113 clamps the toothpaste tube from both sides.

[0025] The toothpaste tube is pre-clamped by the pre-clamping cylinder 114 driving the pre-clamping shaft 112 and the pre-clamping block 113, achieving rapid initial positioning of the toothpaste tube and providing an accurate positional basis for subsequent final clamping and sealing. This pre-clamping method is rapid and stable, effectively improving production cycle time and sealing quality.

[0026] like Figure 1 , Figure 5 and Figure 6 As shown, the pre-clamping mechanism 110 also includes an adjustment component 120, which is used to adjust the position of the pre-clamping shaft 112 in the horizontal and / or vertical directions to accommodate toothpaste tubes of different lengths and diameters.

[0027] In this embodiment, the adjustment component 120 includes a horizontal adjustment component 121 and a vertical adjustment component 127.

[0028] The horizontal adjustment assembly 121 includes a horizontal guide rail 122, a first slider 123, a second slider 124, a first lead screw and nut assembly 125, and a first adjustment handwheel 126. The horizontal guide rail 122 extends horizontally and is fixedly mounted on the third slider 129 of the vertical adjustment assembly 127. The first slider 123 and the second slider 124 are slidably disposed on the horizontal guide rail 122 and can slide left and right along the horizontal guide rail 122.

[0029] Two sets of pre-clamping cylinders 114 are provided on both sides of the pre-clamping shafts 112, that is, each pre-clamping shaft 112 corresponds to a set of pre-clamping cylinders 114 (two pre-clamping cylinders 114). One set of pre-clamping cylinders 114 is fixed on the first slider 123, and the other set of pre-clamping cylinders 114 is fixed on the second slider 124. The first slider 123 and the second slider 124 respectively engage with two threaded sections with opposite directions of rotation in the first lead screw and nut pair 125. Specifically, the first lead screw and nut pair 125 includes a lead screw and two nuts. The lead screw has two threaded sections with opposite directions of rotation. The two nuts respectively engage with the two threaded sections, and the two nuts are respectively fixed to the first slider 123 and the second slider 124. When the first adjusting handwheel 126 is turned, the lead screw rotates. Since the two sections of the thread rotate in opposite directions, the first slider 123 and the second slider 124 move closer or further away synchronously along the horizontal guide rail 122, thereby driving the two sets of pre-clamping cylinders 114 and the two pre-clamping shafts 112 to move closer or further away synchronously to adapt to toothpaste tubes of different diameters.

[0030] The vertical adjustment assembly 127 includes a vertical guide rail 128, a third slider 129, a second lead screw and nut pair 130, and a second adjustment handwheel 131. The vertical guide rail 128 extends vertically and is fixedly mounted on the frame 100. The third slider 129 is slidably mounted on the vertical guide rail 128 and can slide up and down along the vertical guide rail 128. The horizontal guide rail 122 is fixed to the third slider 129. When the second adjustment handwheel 131 is rotated, the second lead screw and nut pair 130 drives the third slider 129 to move up and down along the vertical guide rail 128, thereby driving the horizontal adjustment assembly 121 and the pre-clamping shaft 112 to rise and fall as a whole to accommodate toothpaste tubes of different lengths.

[0031] In this embodiment, the horizontal adjustment component 121 and the vertical adjustment component 127 are also provided with digital displays 132 to display the adjustment position and ensure adjustment accuracy.

[0032] With the cooperation of the horizontal adjustment component 121 and the vertical adjustment component 127, the pre-clamping mechanism 110 can flexibly adapt to the pre-clamping requirements of toothpaste tubes of different specifications. It is easy to operate and precise to adjust, which greatly improves the versatility and adaptability of the equipment.

[0033] like Figure 3 , Figure 4 and Figure 7 As shown, the tail-sealing clamping mechanism 140 is disposed on the frame 100 and located above the pre-clamping mechanism 110. The tail-sealing clamping mechanism 140 includes a first actuation component 141 and a second actuation component 142 disposed opposite to each other.

[0034] The first execution component 141 includes a first clamping cylinder 143 fixed to the frame 100 and a vibration component fixing plate 156. The output end of the first clamping cylinder 143 is connected to the vibration component fixing plate 156. The ultrasonic vibration component 150 is fixedly mounted on the vibration component fixing plate 156, and the first clamping cylinder 143 drives the ultrasonic vibration component 150 to reciprocate in the horizontal direction by driving the vibration component fixing plate 156. The first execution component 141 also includes a first guide shaft 145, which is slidably connected to the frame 100. In this embodiment, four first guide shafts 145 are provided, and a first linear bearing 147 is fixed on the frame 100. The first linear bearing 147 is a flanged first linear bearing. The first guide shafts 145 pass through the first linear bearings 147, thereby achieving a slidable connection with the frame 100. One end of the first guide shaft 145 is fixedly connected to the output end of the first clamping cylinder 143 via the first guide shaft fixing plate 148, and the other end of the first guide shaft 145 is fixedly connected to the vibration assembly fixing plate 156. By setting the first guide shaft 145 and the first linear bearing 147, the straightness and stability of the ultrasonic vibration assembly 150 during movement are ensured, preventing the tail position from shifting due to vibration or skew.

[0035] The second execution component 142 includes a second clamping cylinder 144 fixedly mounted on the frame 100 and a mold assembly fixing plate 157. The output end of the second clamping cylinder 144 is connected to the mold assembly fixing plate 157. The mold clamping assembly 160 is fixedly mounted on the mold assembly fixing plate 157, and the second clamping cylinder 144 drives the mold clamping assembly 160 to reciprocate in the horizontal direction by driving the mold assembly fixing plate 157. The second execution component 142 also includes a second guide shaft 146, which is slidably connected to the frame 100. In this embodiment, two second guide shafts 146 are provided. A first linear bearing 147 is fixedly mounted on the frame 100, and the second guide shafts 146 pass through the first linear bearing 147, thereby achieving a slidable connection with the frame 100. One end of the second guide shaft 146 is fixedly connected to the output end of the second clamping cylinder 144 through a second guide shaft fixing plate 149, and the other end of the second guide shaft 146 is fixedly connected to the mold assembly fixing plate 157. By setting the second guide shaft 146 and the first linear bearing 147, the straightness and stability of the mold clamping assembly 160 during movement are ensured.

[0036] During operation, the first clamping cylinder 143 drives the ultrasonic vibration component 150 to move toward the end of the toothpaste tube via the vibration component fixing plate 156, and the second clamping cylinder 144 drives the mold clamping component 160 to move toward the end of the toothpaste tube via the mold component fixing plate 157. The ultrasonic welding head 151 of the ultrasonic vibration component 150 and the sealing mold block 161 of the mold clamping component 160 move toward each other, clamping the end of the toothpaste tube from both sides.

[0037] Driven independently by the first actuator 141 and the second actuator 142, the ultrasonic welding head 151 and the sealing mold block 161 can move independently to achieve synchronous clamping. The clamping force is uniform and controllable, effectively ensuring the clamping stability and sealing quality during sealing.

[0038] In this embodiment, a first limiting bolt 158 ​​is fixedly installed on the frame 100. The axis of the first limiting bolt 158 ​​is parallel to the axis of the first guide shaft 145. The first limiting bolt 158 ​​is located between the frame 100 and the vibration component fixing plate 156. The first limiting bolt 158 ​​is used to abut against the vibration component fixing plate 156 to limit the travel of the first actuating component 141. A second limiting bolt 159 is fixedly installed on the frame 100. The axis of the second limiting bolt 159 is parallel to the axis of the second guide shaft 146. The second limiting bolt 159 is located between the frame 100 and the mold component fixing plate 157. The second limiting bolt 159 is used to abut against the mold component fixing plate 157 to limit the travel of the second actuating component 142.

[0039] In this embodiment, both the first clamping cylinder 143 and the second clamping cylinder 144 are Festo ADN-63-35-APA-S2-5K8 type cylinders, which have the advantages of accurate stroke and stable output force.

[0040] like Figure 7 and Figure 8 As shown, the ultrasonic vibration assembly 150 is connected to the output end of the first actuator 141 via the vibration assembly fixing plate 156. The ultrasonic vibration assembly 150 includes an ultrasonic welding head 151, an amplitude transformer 152, and a vibration sealing knife 153.

[0041] One end of the amplitude transformer 152 is connected to an ultrasonic transducer (not shown in the figure), and the other end is connected to a vibrating sealing knife 153. An ultrasonic welding head 151 is integrally formed with the vibrating sealing knife 153, and is located at the end of the vibrating sealing knife 153. In this embodiment, the amplitude transformer 152 is mounted on the vibration assembly fixing plate 156 via a mounting flange 154. An adjusting flange 155 is also provided on the mounting flange 154, and the amplitude transformer 152 is adjustablely mounted on the mounting flange 154 via the adjusting flange 155. A spacer is also provided between the mounting flange 154 and the adjusting flange 155; the spacer serves to isolate vibration and prevent high-frequency vibration from being transmitted to the frame 100.

[0042] During operation, the ultrasonic generator (not shown in the figure) transmits high-frequency alternating current to the ultrasonic transducer. The transducer converts electrical energy into high-frequency mechanical vibration through the piezoelectric effect. The vibration is amplified by the amplitude transformer 152 and transmitted to the vibrating sealing knife 153, which then acts on the tail of the toothpaste tube by the ultrasonic welding head 151. The high-frequency vibration causes the material molecules at the tail of the toothpaste tube to rub against each other at high speed, locally heating up to a suitable temperature in a short time, melting the thin sealing layer, and achieving ultrasonic sealing. Ultrasonic sealing has the advantages of instantaneous action, local melting, and is not affected by a small amount of toothpaste contamination. It has higher sealing strength, better airtightness, and a smooth appearance without heat marks.

[0043] During the ultrasonic sealing process, three time periods can be flexibly set according to the thickness and diameter of the hose: compression delay time, ultrasonic fusion time, and pressure holding time. For thin-walled hoses, the ultrasonic time is shortened to prevent melt-through, while for thick-walled hoses, the vibration time is extended to ensure a good seal.

[0044] After the vibration stops, the first clamping cylinder 143 and the second clamping cylinder 144 maintain pressure for 0.05 to 0.15 seconds. Under pressure, the molten plastic molecules permeate and diffuse with each other, and then cool and solidify rapidly to form a leak-free, high-strength integrated seal.

[0045] like Figure 7 and Figure 9 As shown, the mold clamping assembly 160 is connected to the output end of the second actuation assembly 142 via the mold assembly fixing plate 157. The mold clamping assembly 160 includes a sealing mold block 161 and a mold mounting base 163.

[0046] The sealing mold block 161 is fixedly mounted on the mold mounting base 163, which is fixedly mounted on the mold assembly fixing plate 157. In this embodiment, the mold assembly fixing plate 157 has an oblong hole. The mold mounting base 163 is mounted on the mold assembly fixing plate 157 by fasteners passing through the oblong hole, thereby allowing the installation position of the sealing mold block 161 to be adjusted along the oblong hole to accommodate toothpaste tubes of different specifications. The sealing mold block 161 is positioned opposite to the ultrasonic welding head 151. The sealing mold block 161 is arc-shaped, and the surface of the sealing mold block 161 facing the tail of the toothpaste tube is provided with anti-slip serrations 162. The anti-slip serrations 162 are striped serrations arranged along the surface of the sealing mold block 161. The anti-slip serrations 162 are used to increase the friction between the sealing mold block 161 and the tail of the toothpaste tube, preventing the toothpaste tube from slipping during the sealing process, and improving the sealing performance of the seal.

[0047] In this embodiment, the ultrasonic welding head 151 is also arc-shaped, and anti-slip serrations 162 are provided on the side of the ultrasonic welding head 151 facing the tail of the toothpaste tube. The anti-slip serrations 162 on the ultrasonic welding head 151 are arranged opposite to the anti-slip serrations 162 on the sealing mold block 161, applying friction to the tail of the toothpaste tube from both sides simultaneously, further preventing the toothpaste tube from sliding during the sealing process, ensuring accurate sealing position and a smooth seal. The shapes of the sealing mold block 161 and the ultrasonic welding head 151 can be designed and replaced according to different sealing requirements, providing flexible adaptability.

[0048] like Figure 2 and Figure 10 As shown, the toothpaste tube sealing device of this utility model also includes a pressing mechanism 180. The pressing mechanism 180 is disposed on the frame 100 and located above the sealing clamping mechanism 140, and is used for sealing and positioning toothpaste tubes, especially tube-in-tube toothpaste tubes. The pressing mechanism 180 includes a fixed base 181, a pressing cylinder 182, a pressing plate 183, a second linear bearing 184, a third guide shaft 185, and a positioning plate 186. The fixed base 181 is fixedly disposed on the frame 100, and the pressing cylinder 182 is fixedly disposed on the fixed base 181. The output end of the pressing cylinder 182 is fixedly connected to the pressing plate 183.

[0049] Two second linear bearings 184 are also fixedly mounted on the fixed base 181, located on both sides of the pressing cylinder 182. A third guide shaft 185 is slidably mounted inside the second linear bearing 184. The axis of the third guide shaft 185 is parallel to the axis of the output shaft of the pressing cylinder 182. The lower end of the third guide shaft 185 is fixedly connected to the pressing plate 183. When the pressing cylinder 182 drives the pressing plate 183 to move up and down, the third guide shaft 185 slides up and down along the second linear bearings 184, playing a guiding role and ensuring the straightness and stability of the movement of the pressing plate 183.

[0050] Multiple positioning plates 186 are fixedly installed on the lower pressure plate 183. In this embodiment, three positioning plates 186 are provided, each corresponding to one of the three sealing stations. The positioning plates 186 are used to insert into the tail of the toothpaste tube, open the inner and outer tubes of the toothpaste tube, and keep the toothpaste tube in a consistent shape before the final sealing action, thus ensuring the consistency of the sealing quality.

[0051] The positioning plate 186 has a first positioning protrusion 187 on its surface facing the toothpaste tube, which engages with the outer tube of the toothpaste tube. A second positioning protrusion 188 is also provided on the surface of the first positioning protrusion 187 facing the toothpaste tube, engaging with the inner tube of the toothpaste tube. Both the first positioning protrusion 187 and the second positioning protrusion 188 are oblong in shape, their outlines matching the inner circumference of the corresponding tubes, facilitating the opening of the inner and outer tubes after insertion into the toothpaste tube. The edges of the first positioning protrusion 187 and the second positioning protrusion 188 facing the toothpaste tube are chamfered to allow the positioning plate 186 to be smoothly inserted between the inner and outer tubes of the toothpaste tube.

[0052] During operation, the toothpaste tube first reaches the sealing station, where the pre-clamping mechanism 110 pre-clamps and positions it. Then, the pressing mechanism 180 activates, and the pressing cylinder 182 drives the pressing plate 183 downwards, simultaneously moving the three positioning plates 186 downwards. The positioning plates 186 insert into the tail of the toothpaste tube, and the first positioning protrusion 187 and the second positioning protrusion 188 respectively open the outer and inner tubes of the toothpaste tube, shaping them into a specific form. Then, the pressing cylinder 182 quickly retracts, causing the positioning plates 186 to exit the toothpaste tube. Finally, the sealing clamping mechanism 140 activates, completing the sealing process.

[0053] Through the positioning and shaping action of the pressing mechanism 180, the inner and outer tubes of the toothpaste tube maintain a consistent shape before sealing, effectively ensuring the consistency of the sealing quality of the tube-in-tube structure toothpaste tube. The pressing mechanism 180 operates quickly and positions precisely, greatly improving the yield and production efficiency of sealing tube-in-tube structure toothpaste tubes.

[0054] The toothpaste tube sealing device of this invention also includes a cooling mechanism. The cooling mechanism adopts air cooling, and cooling holes (not shown in the figure) are machined on the vibrating sealing knife 153. An air pipe is connected to achieve the cooling effect. After the cooling gas is delivered to the cooling holes through the air pipe, it is blown towards the tail of the sealed toothpaste tube to achieve rapid cooling and solidification, thereby improving the sealing quality and production efficiency.

[0055] The working process of the toothpaste tube sealing device of this utility model is as follows: First, the pre-clamping mechanism 110 is adjusted using the adjusting assembly 120 according to the length and diameter of the toothpaste tube to be sealed. Rotating the first adjusting handwheel 126 drives the first slider 123 and the second slider 124 to move synchronously closer or further away along the horizontal guide rail 122 via the first lead screw and nut pair 125, adjusting the distance between the two pre-clamping shafts 112 to match the diameter of the toothpaste tube. Rotating the second adjusting handwheel 131 drives the third slider 129 to move up and down along the vertical guide rail 128 via the second lead screw and nut pair 130, adjusting the overall height of the pre-clamping mechanism 110 to match the length of the toothpaste tube.

[0056] After adjustment, the toothpaste tube is conveyed to the sealing station. The pre-clamping cylinder 114 is activated, driving the two pre-clamping shafts 112 to move closer to each other. The pre-clamping blocks 113 clamp the toothpaste tube from the left and right sides near the tail end, pre-clamping and positioning the toothpaste tube.

[0057] For toothpaste tubes with a tube-in-tube structure, after pre-clamping, the pressing mechanism 180 is activated. The pressing cylinder 182 drives the pressing plate 183 to move downwards, causing the three positioning plates 186 to move downwards synchronously. The positioning plates 186 are inserted into the tail of the toothpaste tube, and the first positioning protrusion 187 and the second positioning protrusion 188 respectively open the outer tube and the inner tube of the toothpaste tube, so that the inner tube and the outer tube are in a certain shape. Then the pressing cylinder 182 quickly retracts, causing the positioning plates 186 to exit the toothpaste tube.

[0058] Subsequently, the sealing clamping mechanism 140 is activated. The first clamping cylinder 143 drives the ultrasonic vibration component 150 to move toward the end of the toothpaste tube via the vibration component fixing plate 156, and the second clamping cylinder 144 drives the mold clamping component 160 to move toward the end of the toothpaste tube via the mold component fixing plate 157. The ultrasonic welding head 151 and the sealing mold block 161 move toward each other, clamping the end of the toothpaste tube from both sides.

[0059] After clamping, the ultrasonic vibration assembly 150 is activated. The ultrasonic generator transmits high-frequency alternating current to the ultrasonic transducer, which generates high-frequency mechanical vibration. This vibration is amplified by the amplitude transformer 152 and transmitted to the vibrating sealing knife 153. The ultrasonic welding head 151 then acts on the tail of the toothpaste tube to perform ultrasonic sealing. During the sealing process, the pressing delay time, ultrasonic fusion time, and pressure holding time are flexibly set according to the thickness and diameter of the toothpaste tube.

[0060] After the end is sealed, the vibration stops, and the first clamping cylinder 143 and the second clamping cylinder 144 maintain pressure for 0.05 to 0.15 seconds, allowing the molten plastic to cool and solidify under pressure. At the same time, cooling gas is blown through the air pipe and cooling hole to the end of the sealed toothpaste tube to accelerate cooling and solidification.

[0061] Finally, the first clamping cylinder 143 and the second clamping cylinder 144 reverse their movements, causing the ultrasonic welding head 151 and the sealing mold block 161 to move away from each other, releasing the toothpaste tube. The pre-clamping cylinder 114 reverses its movement, driving the two pre-clamping shafts 112 to move away from each other, releasing the toothpaste tube. The sealed toothpaste tube is then conveyed to the next process.

[0062] This process is repeated to achieve continuous and automated sealing of toothpaste tubes.

[0063] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A toothpaste tube sealing device, characterized in that, include: Rack (100); A pre-clamping mechanism (110) is provided on the frame (100). The pre-clamping mechanism (110) includes two pre-clamping members arranged symmetrically. The two pre-clamping members can move closer to or further away from each other to pre-clamp the toothpaste tube near the tail end. The tail-sealing clamping mechanism (140) is disposed on the frame (100) and located above the pre-clamping mechanism (110). The tail-sealing clamping mechanism (140) includes a first actuating component (141) and a second actuating component (142) disposed opposite to each other. An ultrasonic vibration assembly (150) is connected to the output end of the first actuation assembly (141), and the ultrasonic vibration assembly (150) includes an ultrasonic welding head (151). A mold clamping assembly (160) is connected to the output end of the second actuation assembly (142), and the mold clamping assembly (160) includes a sealing mold block (161). The ultrasonic welding head (151) moves toward the sealing mold block (161) to clamp the tail end of the toothpaste tube.

2. The toothpaste tube sealing device according to claim 1, characterized in that, The pre-clamping component is a pre-clamping shaft (112), and a plurality of pre-clamping blocks (113) are spaced apart along the axial direction on the pre-clamping shaft (112). The pre-clamping blocks (113) on the two pre-clamping shafts (112) are arranged opposite to each other. The pre-clamping mechanism (110) also includes a pre-clamping cylinder (114), which is connected to the pre-clamping shaft (112) to drive the two pre-clamping shafts (112) to move closer to or further away from each other.

3. The toothpaste tube sealing device according to claim 2, characterized in that, The pre-clamping mechanism (110) further includes an adjustment component (120) which adjusts the position of the pre-clamping member in the horizontal and vertical directions.

4. The toothpaste tube sealing device according to claim 3, characterized in that, The adjustment assembly (120) includes a horizontal adjustment assembly (121), which includes a horizontal guide rail (122), a first slider (123), a second slider (124), a first lead screw and nut pair (125), and a first adjustment handwheel (126). The pre-clamping cylinder (114) is provided in two sets, one set of which is fixed to the first slider (123), and the other set of which is fixed to the second slider (124). The first slider (123) and the second slider (124) respectively cooperate with two threaded sections with opposite directions of rotation in the first lead screw and nut pair (125). When the first adjustment handwheel (126) is rotated, the first slider (123) and the second slider (124) move synchronously closer to or further away from the horizontal guide rail (122).

5. The toothpaste tube sealing device according to claim 4, characterized in that, The adjustment assembly (120) further includes a vertical adjustment assembly (127), which includes a vertical guide rail (128), a third slider (129), a second lead screw and nut pair (130), and a second adjustment handwheel (131). The horizontal guide rail (122) is fixed on the third slider (129). When the second adjustment handwheel (131) is rotated, the third slider (129) moves up and down along the vertical guide rail (128) to drive the horizontal adjustment assembly (121) and the pre-clamping member to rise and fall as a whole.

6. The toothpaste tube sealing device according to claim 1, characterized in that, The first execution component (141) includes a first clamping cylinder (143) fixed to the frame (100), the output end of the first clamping cylinder (143) being connected to the ultrasonic vibration component (150), and the second execution component (142) includes a second clamping cylinder (144) fixed to the frame (100), the output end of the second clamping cylinder (144) being connected to the mold clamping component (160).

7. The toothpaste tube sealing device according to claim 6, characterized in that, The first execution component (141) further includes a first guide shaft (145), which is slidably connected to the frame (100). One end of the first guide shaft (145) is connected to the output end of the first clamping cylinder (143), and the other end of the first guide shaft (145) is connected to the ultrasonic vibration component (150). The second execution component (142) further includes a second guide shaft (146), which is slidably connected to the frame (100). One end of the second guide shaft (146) is connected to the output end of the second clamping cylinder (144), and the other end of the second guide shaft (146) is connected to the mold clamping component (160).

8. The toothpaste tube sealing device according to claim 6, characterized in that, The ultrasonic vibration assembly (150) also includes an amplitude transformer (152) and a vibration sealing knife (153). One end of the amplitude transformer (152) is used to connect to the ultrasonic transducer, and the other end of the amplitude transformer (152) is connected to the vibration sealing knife (153). The ultrasonic welding head (151) is integrally formed at the end of the vibration sealing knife (153).

9. The toothpaste tube sealing device according to claim 1, characterized in that, It also includes a pressing mechanism (180), which includes a pressing cylinder (182) fixed to the frame (100) and a pressing plate (183) fixedly connected to the output end of the pressing cylinder (182). The pressing plate (183) is located above the sealing clamping mechanism (140). A positioning plate (186) for inserting into the tail of the toothpaste tube to open the inner and outer tubes of the toothpaste tube is fixedly provided on the pressing plate (183). A second linear bearing (184) is also provided on the frame (100). A third guide shaft (185) is slidably provided in the second linear bearing (184). The lower end of the third guide shaft (185) is fixedly connected to the pressing plate (183).

10. The toothpaste tube sealing device according to claim 9, characterized in that, The positioning plate (186) has a first positioning protrusion (187) on the side facing the toothpaste tube for engaging with the outer tube of the toothpaste tube. The first positioning protrusion (187) has a second positioning protrusion (188) on the side facing the toothpaste tube for engaging with the inner tube of the toothpaste tube. Both the first positioning protrusion (187) and the second positioning protrusion (188) are oblong in shape.

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