Dialysis dry powder barrel welding device

Abstract

The dialysis dry powder barrel welding device comprises an ultrasonic welding machine and a welding die, the welding die comprises a welding die head and a welding bottom die which are oppositely arranged up and down, and the welding die head is arranged on the ultrasonic welding machine; a welding part protruding out of the bottom end face of the welding die head is arranged at the bottom of the welding die head, and nicks which are continuously arranged along the welding face at intervals are arranged on the welding face of the welding part. According to the utility model, the nicks which are continuously arranged at intervals along the welding surface are arranged on the welding surface of the welding die head, and the uniformity of ultrasonic friction energy transmission is improved through the nicks, so that the poor appearance problem of black spots on the welding contact surface of the barrel cover caused by friction heat accumulation during ultrasonic welding is solved, and the appearance quality of a product is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to processing equipment technical field, concretely relates to a welding device of dialysis dry powder barrel. BACKGROUND

[0002] The dialysis dry powder is used for sodium bicarbonate dialysis treatment of patients with acute or chronic kidney failure or acute dialyzable poison poisoning, and the dialysis dry powder is stored by being packaged in a dry powder barrel made of plastic. Figure 1 It is a structure diagram of dialysis dry powder barrel, as shown in Figure 1 The dialysis dry powder barrel comprises a barrel body 100 containing dialysis dry powder and a barrel cover 101 sealing the top open mouth of the barrel body 100, and after the dialysis dry powder is loaded into the barrel body 100, the barrel cover 101 and the barrel body 100 need to be welded together to form a sealed body. At present, in the production of the dialysis dry powder barrel, the barrel cover 101 and the barrel body 100 are welded together by using an ultrasonic welding process. In the ultrasonic welding process, the energy of ultrasonic friction is transmitted to the barrel cover through a welding die, and in the energy transmission process, there is a problem of energy uniformity, and after welding and fusing, the outer surface of the barrel cover sometimes has irregular black spots and other abnormalities caused by local overheating, which affects the appearance quality of the product, causes the appearance quality of the product to be uncontrollable, and reduces the yield of the product. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a dialysis dry powder barrel welding device which can improve the appearance quality of welded products such as dialysis dry powder barrels.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] The dialysis dry powder barrel welding device comprises an ultrasonic welding machine and a welding die, the welding die comprises a welding die head and a welding bottom die arranged oppositely, the welding die head is arranged on the ultrasonic welding machine, the bottom of the welding die head is provided with a welding part protruding from the bottom end face of the welding die head, and the welding surface of the welding part is provided with score marks arranged continuously and at intervals along the welding surface.

[0006] As an optional embodiment of the utility model, the score marks are crescent-shaped score marks composed of two arc-shaped score marks.

[0007] As an optional embodiment of the utility model, the depth of the score marks is 0.02-0.1 mm.

[0008] As an optional embodiment of the utility model, the width of the score marks is 5-8 mm.

[0009] As an optional embodiment of the utility model, the thickness of the score marks is 0.05 mm.

[0010] As optional embodiment of the utility model, the crescent-shaped score protrudes towards clockwise direction.

[0011] As optional embodiment of the utility model, the maximum distance between the outer arc and the inner arc of the crescent-shaped score is 0.7-1.2mm.

[0012] As optional embodiment of the utility model, the minimum distance between the outer arc and the inner arc of the two adjacent crescent-shaped scores is less than 0.2mm.

[0013] As optional embodiment of the utility model, the radian of the outer arc of the crescent-shaped score is 60-70°.

[0014] As optional embodiment of the utility model, the welding part is circular ring shape; the welding bottom die has the cavity of placing the barrel body of the dialysis dry powder barrel, the top of the cavity is provided with the support jig, the top of the support jig is provided with the circular convex ring protruding upwards for supporting the outer flanging of the barrel top; and / or, the observation opening is formed on the peripheral wall of the welding bottom die.

[0015] From the above technical scheme, the utility model sets the score arranged continuously and spaced apart along the welding surface on the welding surface of the welding die, improves the uniformity of the energy transmission when ultrasonic friction through the score, after setting the score on the welding surface, equivalent to setting the heat transmission release area for the welding area, when local overheating appears in the welding process, the energy can be released through the space of the score, improves the uneven energy condition, especially the crescent-shaped score, the score of this shape can overcome the appearance bad problem of the black spot appearing on the welding contact surface of the dialysis dry powder barrel cover caused by the friction heat gathering in ultrasonic welding, improves the product appearance quality. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the embodiment of the utility model, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description is only some embodiments of the utility model, and for the ordinary skilled person in the art, other drawings can be obtained according to these drawings without paying creative labor.

[0017] Figure 1 It is the structure schematic view of dialysis dry powder barrel;

[0018] Figure 2 It is the structure schematic view of the dry powder barrel welding device of the embodiment of the utility model;

[0019] Figure 3 It is the structure schematic view of the welding die of the embodiment of the utility model;

[0020] Figure 4 It is along Figure 3A-A line of the sectional view of the middle part;

[0021] Figure 5 Structure schematic view of the welding die of the embodiment of the present application;

[0022] Figure 6 Structure schematic view of another angle of the welding die of the embodiment of the present application;

[0023] Figure 7 For Figure 6 Local enlarged schematic view of the A part of the middle part;

[0024] Figure 8 For Figure 7 Local enlarged schematic view of the B part of the middle part;

[0025] Figure 9 Structure schematic view of the welding die of the embodiment of the present application;

[0026] Figure 10 Schematic view of welding the dialysis dry powder barrel by using the welding die of the embodiment of the present application.

[0027] The specific embodiments of the present application will be further described in detail below in combination with the accompanying drawings. DETAILED DESCRIPTION

[0028] The present application will be described in detail below in combination with the accompanying drawings. In the detailed description of the embodiments of the present application, the drawings of the device structure will be partially enlarged without the general proportion for the convenience of description, and the schematic view is only an example, which should not limit the scope of protection of the present application. It should be noted that the drawings are simplified and all use non-precise proportions, only to facilitate and clearly assist the purpose of describing the embodiments of the present application. Meanwhile, in the description of the present application, the terms "first", "second" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features; the terms "positive", "negative", "bottom", "upper", "lower" and the like indicate the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "connects", "connects" should be understood broadly, for example, it can be fixed connection, also can be detachable connection, or integrally connects, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirect connection through intermediate medium, also can be the intercommunication of two elements, can be wireless connection, also can be wired connection. For ordinary skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances.

[0030] When the barrel body and the barrel cover of the dialysis dry powder barrel are welded by adopting the ultrasonic welding process, a welding die needs to be used, and the welding die head and the welding bottom die of the welding die are located at the upper and lower sides of the barrel cover and the barrel body welding area respectively during welding, and the energy of ultrasonic friction is transmitted to the barrel cover through the welding die head. The welding surface (the surface of the contact area between the welding die head and the barrel cover) of the welding die head used for the ultrasonic welding of the dialysis dry powder barrel is smooth, and there is the problem of uneven energy during the ultrasonic welding friction energy transmission, so that irregular black spots may appear on the outer surface of the barrel cover of the dialysis dry powder barrel after welding, and other appearance defects may occur. This situation may also occur under the condition that the welding parameters are stable, so that the appearance quality of the product is uncontrollable, and the appearance yield of the product is affected. According to the analysis of the inventor, the black spots are caused by the over-temperature of the plastic due to local overheating of the welding die head with a smooth surface during welding. In order to solve the above problems, the structure of the welding die used for the ultrasonic welding of the dialysis dry powder barrel, especially the welding die head, is improved to overcome the appearance defect problem caused by uneven energy during the ultrasonic welding process.

[0031] As shown in Figure 2 , Figure 3 , Figure 4 , the dialysis dry powder barrel welding device of the embodiment comprises a welding die 1, an ultrasonic welding machine 2 and a welding machine support 3. The ultrasonic welding machine 2 is installed on the welding machine support 3 and is fixed by the welding machine support 3. The welding die 1 comprises an upper and lower welding die head 1-1 and a welding bottom die 1-2, the welding die head 1-1 is installed on the ultrasonic welding machine 2, the welding bottom die 1-2 is installed on the fixed seat 4, and the welding die head 1-1 is located above the welding bottom die 1-2. The welding die head 1-1 can move up and down relative to the welding bottom die 1-2, and when the welding die head 1-1 and the welding bottom die 1-2 are close to each other and tightly pressed together, the object located between the welding die head 1-1 and the welding bottom die 1-2 can be welded together.

[0032] Continuing to refer to Figure 4 , Figure 5 , Figure 6 and Figure 7In this embodiment, the top of the welding die 1-1 is machined with a threaded hole 1-1b for engaging with threaded fasteners such as bolts to mount the welding die 1-1 onto the ultrasonic welding machine 2. In this embodiment, a circular welding portion 1-1a is provided at the bottom of the welding die 1-1 (the end of the welding die 1-1 opposite to the welding base mold 1-2). When the welding die 1-1 presses down onto the welding base mold 1-2, the welding portion 1-1a contacts the barrel lid 101, and the surface of the welding portion 1-1a in contact with the barrel lid 101 is the welding surface s.

[0033] In this embodiment, continuously spaced grooves q are machined on the welding surface s of the welding part 1-1a, and the grooves q are continuously arranged along the annular welding surface s. Figure 5 Only a portion of the notch q is shown. The notch q can be machined on the welding surface s using an EDM machine. Ultrasonic welding transmits energy through the contact of objects and the frictional conduction of ultrasonic vibrations to melt the plastic welding line and form a seal. By setting the notch q on the welding surface s, the welding die 1-1 can achieve uniform energy transfer during ultrasonic welding, avoiding black spots caused by localized overheating, thereby improving the appearance problem of black spots appearing on the welding contact surface of the bucket lid caused by frictional heat accumulation during ultrasonic welding.

[0034] like Figure 6 , Figure 7 and Figure 8 As shown, the notch q in this embodiment is a crescent-shaped notch composed of two arc-shaped notches. The welding surface s has an inner edge L1 (the inner edge is the edge closer to the axis of the welding die) and an outer edge L2 (the outer edge is the edge farther away from the axis of the welding die). The welding contact area between the welding die and the lid is along the inner edge of the welding surface s. Therefore, the notch q and the inner edge L1 are arranged adjacent to each other, that is, the notch q is continuously arranged on the welding surface s along the inner edge L1, and there is a gap between the notch q and the outer edge L2. When the welding die 1-1 and the welding bottom die 1-2 cooperate to perform welding, the arrangement area of ​​the notch q is the range of contact between the welding surface s and the lid 101. For example, when the inner diameter of the welding surface s is 82.0 mm and the outer diameter is 95.0 mm, the inner diameter of the area where the welding surface s and the lid 101 contact is 82.0 mm and the outer diameter is 89.0 mm. Then the notch q is set in the welding contact area with an inner diameter of 82.0 mm and an outer diameter of 89.0 mm.

[0035] In practical applications, the depth of the notch q can be 0.02–0.1 mm, and in this embodiment, the depth of the notch q is 0.06 mm. Furthermore, the width w of the notch q can be 5–8 mm, and in this embodiment, the width w (the distance between the two endpoints of the notch) of the notch q is 6.08 mm. Even further, the thickness of the notch q is 0.05 mm.

[0036] The crescent-shaped score q of the embodiment is composed of two arc-shaped scores, and the crescent-shaped score is protruded in the clockwise direction (the direction of the arrow in the figure), i.e. the concave side of the crescent-shaped score is in the counterclockwise direction. For the convenience of description, the arc-shaped score on the protruded side of the crescent-shaped score is defined as the outer arc s1 of the crescent-shaped score, and the other arc-shaped score is defined as the inner arc s2 of the crescent-shaped score. Figure 8 The crescent-shaped score q of the embodiment is composed of two arc-shaped scores, and the crescent-shaped score is protruded in the clockwise direction (the direction of the arrow in the figure), i.e. the concave side of the crescent-shaped score is in the counterclockwise direction. For the convenience of description, the arc-shaped score on the protruded side of the crescent-shaped score is defined as the outer arc s1 of the crescent-shaped score, and the other arc-shaped score is defined as the inner arc s2 of the crescent-shaped score. Figure 8 The crescent-shaped score q of the embodiment is composed of two arc-shaped scores, and the crescent-shaped score is protruded in the clockwise direction (the direction of the arrow in the figure), i.e. the concave side of the crescent-shaped score is in the counterclockwise direction. For the convenience of description, the arc-shaped score on the protruded side of the crescent-shaped score is defined as the outer arc s1 of the crescent-shaped score, and the other arc-shaped score is defined as the inner arc s2 of the crescent-shaped score.

[0037] The maximum distance d between the outer arc s1 and the inner arc s2 of the crescent-shaped score can be 0.7-1.2 mm. The minimum distance d0 between the outer arc s1 and the inner arc s2 of the adjacent crescent-shaped score is less than 0.2 mm. In some embodiments, the curvature of the outer arc s1 of the crescent-shaped score can be 60-70°, and the curvature a of the outer arc s1 of the embodiment is 67.5°. The curvature of the inner arc s2 is not specifically limited.

[0038] Referring to Figures 3 to 6 and Figure 9 , the welding die 1-1 and the welding bottom die 1-2 of the embodiment are both cylindrical. The top of the welding die 1-1 is provided with a threaded hole 1-1b, and the bottom is provided with an inner cavity 1-1c extending upward from the bottom end surface of the welding die 1-1. The bottom of the inner cavity 1-1c is a circular truncated cone opening with a large bottom and a small top, which is suitable for the shape of the barrel cover. The welding part 1-1a protrudes downward along the axis of the welding die from the bottom end surface of the welding die 1-1.

[0039] The welding bottom die 1-2 of the embodiment is provided with a cavity 1-2a for accommodating the barrel body 100, and the barrel body 100 is placed in the cavity 1-2a of the welding bottom die 1-2 during welding. The shape of the upper middle section of the cavity 1-2a of the welding bottom die 1-2 of the embodiment is suitable for the shape of the barrel body 100, and the bottom is expanded with a large top and a small bottom, which facilitates the lifting of the welded dry powder barrel by the upper lifting mechanism (not shown) located below the barrel body, so that the dry powder barrel can be gripped and transferred out to avoid interference.

[0040] The top of the cavity 1-2a of the welding bottom die 1-2 of the embodiment is provided with a support jig 1-3 for supporting the barrel body. The top of the support jig 1-3 is provided with a circular protruding ring 1-3a, which corresponds to the welding part 1-1a of the welding die 1-1. The protruding ring 1-3a is used to support the outer flange of the top of the barrel body 100, and plays a supporting role for the barrel body 100, so that there is a certain distance between the outer flange of the barrel body 100 and the upper end surface of the welding bottom die 1-2, thereby facilitating the buckling of the barrel cover 101 on the barrel body 100, so that the edge of the barrel cover 101 can wrap the edge of the barrel body 100 downward, and the two are positioned and matched, as shown in Figure 10 .

[0041] Preferably, the peripheral wall of the welding mold 1-2 is provided with observation ports 1-2b. These ports allow observation of the position of the barrel 100 within the cavity 1-2a of the welding mold 1-2, such as whether it is misaligned. They also facilitate the removal of sodium bicarbonate powder that has fallen from the barrel 100 into the welding mold 1-2, preventing excessive powder accumulation from obstructing the upper lifting mechanism located below the barrel 100. In this embodiment, four observation ports 1-2b are evenly spaced along the circumference of the peripheral wall of the welding mold 1-2.

[0042] like Figure 10 As shown, when performing ultrasonic welding on the body and lid of the dialysis dry powder container using the dialysis dry powder container of this embodiment, the container 100 containing the powder is first placed into the cavity 1-2a of the welding bottom mold 1-2, and then the lid 101 is placed on the container 100. Then, the ultrasonic welding machine 2 drives the welding die head 1-1 to move downward, close the mold with the welding bottom mold 1-2 and apply pressure. The ultrasonic welding machine 2 releases energy, and the container 100 and the lid 101 are welded together.

[0043] This invention features grooves on the welding surface of the welding die, preventing the welding contact surface from becoming smooth and flat. The grooved area forms a heat transfer and release zone, allowing localized overheating heat to dissipate through the grooved space. This improves the problem of black spots appearing on the welding contact surface of the bucket lid caused by frictional heat accumulation during ultrasonic welding, thereby enhancing the product's appearance quality.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dialysis dry powder bucket welding apparatus, characterized by, The application relates to an ultrasonic welding machine and a welding die. The bottom of the welding die head is provided with a welding part protruding from the bottom end surface of the welding die head, and the welding surface of the welding part is provided with score marks arranged continuously and at intervals along the welding surface. The score marks are crescent-shaped score marks composed of two arc-shaped score marks.

2. The dialysis dry powder bucket welding apparatus of claim 1, wherein: The depth of the score marks is 0.02-0.1 mm.

3. The dialysis dry powder bucket welding apparatus of claim 1, wherein: The width of the score marks is 5-8 mm.

4. The dialysis dry powder bucket welding apparatus of claim 1, wherein: The thickness of the score marks is 0.05 mm.

5. The dialysis dry powder bucket welding apparatus of claim 1, wherein: The crescent-shaped score marks protrude towards the clockwise direction.

6. The dialysis dry powder bucket welding apparatus of claim 2, wherein: The maximum distance between the outer arc and the inner arc of the crescent-shaped score marks is 0.7-1.2 mm.

7. The dialysis dry powder bucket welding apparatus of claim 2, wherein: The minimum distance between the outer arc and the inner arc of two adjacent crescent-shaped score marks is less than 0.2 mm.

8. The dialysis dry powder bucket welding apparatus of claim 2, wherein: The radian of the outer arc of the crescent-shaped score marks is 60-70 degrees.

9. The dialysis dry powder bucket welding apparatus of claim 2, wherein: The welding part is a circular ring; the welding bottom die has a cavity for placing a dialysis dry powder barrel body, the top of the cavity is provided with a supporting jig, the top of the supporting jig is provided with a circular convex ring protruding upwards for supporting the outer flange of the top of the barrel body.

10. The dialysis dry powder bucket welding device of any one of claims 1-9, wherein: And / or, an observation opening is arranged on the peripheral wall of the welding bottom die. ​

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