Positioning top fork for soft bag sealing and soft bag sealing device

Abstract

The utility model discloses a positioning top fork for sealing a soft bag and a soft bag sealing device, and relates to the field of medicine packaging instruments, in particular to the positioning top fork for sealing the soft bag and the soft bag sealing device, which comprises a central positioning top fork, a positioning surface is arranged at the front end of the central positioning top fork, and the positioning surface is used for abutting against a workpiece; the two anti-warping pressing forks are arranged on the two sides of the center positioning top fork respectively, the rear ends of the anti-warping pressing forks are fixedly connected with the rear end of the center positioning top fork, and limiting faces are arranged at the front ends of the anti-warping pressing forks and used for preventing the free end of the workpiece or the workpiece clamp from warping upwards; according to the positioning top fork for soft bag sealing and the soft bag sealing device, the design that the center positioning top fork and the anti-warping pressing fork are combined is adopted, the center positioning top fork makes contact with a workpiece for positioning, the positioning effect of the workpiece is guaranteed, meanwhile, the free end of a soft bag fixing clamp is pressed downwards through the anti-warping pressing fork, the soft bag fixing clamp is prevented from warping upwards, and the working efficiency is improved. Therefore, the workpiece is prevented from being warped upwards and collided with the heating sheet during positioning and being on fire, and production safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of medicine packaging equipment, and more specifically, to a positioning top fork for sealing a soft bag. In addition, the utility model also relates to a soft bag sealing device comprising the positioning top fork for sealing a soft bag. Background Art

[0002] The application of soft infusion bags in clinical infusion is becoming more and more extensive. The soft infusion bag is a new concept of fully enclosed intravenous infusion product that can effectively avoid secondary contamination. It is the future development direction and has great development space.

[0003] In the production process of infusion soft bags, sealing after filling is a necessary procedure, in which the sealing of the infusion soft bags is achieved through a sealing device. Therefore, the sealing device is an important part of the infusion soft bag production line. Its function is to seal the interface of the outer cover and the infusion soft bag together after the filling of the infusion soft bag is completed. The quality requirements are that the outer cover and the interface are evenly heat-sealed, the welding center deviation between the mouth tube and the combined cover is no more than 0.5mm, the welding surface is completely and evenly fused, and there is no leakage.

[0004] At present, there is a non-PVC film infusion soft bag production line on the market, which adopts a combined infusion soft bag fixing fixture. The combined infusion soft bag fixing fixture can simultaneously meet the bag making process and the filling process. Although it greatly simplifies the equipment structure, shortens the equipment length, and reduces the production cost, in the existing sealing technology, the sealing positioning device does not position the combined infusion soft bag fixing fixture well. Specifically, Figure 1 and Figure 2 As shown:

[0005] 1. The positioning fork 1 often contacts the workpiece too loosely or loosely, causing the sealing welding center to deviate too much;

[0006] 2. The positioning top fork 1 is in too tight contact with the workpiece, causing the free end of the combined soft bag fixing fixture 2 to slightly tilt up, so that it collides with the heating plate and causes the infusion soft bag to catch fire and other undesirable phenomena.

[0007] Therefore, how to provide a positioning top fork and sealing device for soft bag sealing that can not only meet the positioning requirements during the sealing process of infusion soft bags, but also reduce the impact of the positioning top fork on the quality of the finished product, and can be easily installed and adjusted has become an urgent problem to be solved by people in this field. Utility Model Content

[0008] In view of this, the purpose of the utility model is to provide a positioning top fork for sealing a soft bag, which adopts a design combining a center positioning top fork and an anti-warping pressure fork. The center positioning top fork contacts and positions the workpiece to ensure the positioning effect of the workpiece. At the same time, the anti-warping pressure fork presses down the free end of the soft bag fixing clamp to prevent it from warping up, thereby avoiding warping during positioning, causing the workpiece to contact the heating plate and cause fire, thereby ensuring production safety.

[0009] Another object of the utility model is to provide a soft bag sealing device including the positioning top fork for sealing the soft bag, which can solve the same technical problem and achieve the same object.

[0010] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0011] A positioning top fork for sealing a soft bag, comprising:

[0012] A center positioning top fork, wherein a positioning surface is provided at the front end of the center positioning top fork, and the positioning surface is used to contact with the workpiece;

[0013] Anti-warping pressure fork, two anti-warping pressure forks are respectively arranged on both sides of the central positioning top fork, and the rear end of the anti-warping pressure fork is fixedly connected to the rear end of the central positioning top fork, and the front end of the anti-warping pressure fork is provided with a limited position surface, and the limited position surface is used to prevent the free end of the workpiece or the workpiece fixture from warping up.

[0014] Preferably, the positioning surface is a contoured surface that matches the shape of the positioning and clamping contact surface of the workpiece, or the positioning surface is in an arc shape.

[0015] Preferably, the limiting surface is higher than an upper edge of the workpiece positioning and clamping contact surface and / or higher than an upper edge of a free end of the workpiece fixture.

[0016] Preferably, the limiting surface is a chamfered surface or a rounded arc surface.

[0017] Preferably, the anti-warping pressure fork is fixedly connected to the central positioning top fork in the form of a cantilever beam.

[0018] Preferably, the front end of the central positioning top fork protrudes beyond the anti-warping pressure forks on both sides.

[0019] Preferably, it also includes an extended mounting arm, wherein the extended mounting arm is integrally formed with the center positioning top fork and the anti-warping pressure fork, and a first circulating water channel for heat dissipation is arranged in the extended mounting arm.

[0020] A soft bag sealing device comprises the above-mentioned positioning top fork for sealing the soft bag.

[0021] Preferably, it also includes a soft bag fixing clip and a supporting assembly;

[0022] The soft bag fixing clamp is used to clamp the workpiece;

[0023] The support assembly is used to support the soft bag fixing clip and the soft bag sealing positioning top fork in a positioned state.

[0024] Preferably, a sliding bar is provided on the working surface of the support assembly, the sliding bar is made of a material with a low friction coefficient, and a second circulating water channel for heat dissipation is provided inside the sliding bar.

[0025] The utility model provides a positioning top fork for sealing a soft bag, which has at least the following beneficial effects compared with the prior art:

[0026] 1. The combination design of center positioning top fork and anti-warping pressure fork is adopted. The center positioning top fork is used to contact the workpiece, and the workpiece fixture is used for positioning to ensure its positioning effect. The anti-warping pressure fork is used to prevent the workpiece or workpiece fixture from warping, thereby avoiding the workpiece or workpiece fixture from colliding with the heating plate and causing the workpiece to contact and catch fire, ensuring production safety.

[0027] 2. After adding the anti-warping pressure fork, the problem of the workpiece or workpiece fixture warping caused by the positioning top fork being too tight in contact with the workpiece can be effectively suppressed. Therefore, when positioning, there is no need to consider the problem of the positioning top fork being too tight or too loose in contact with the workpiece. It is only necessary to ensure accurate positioning, which can effectively avoid the problem of the positioning top fork being too loose in contact with the workpiece to prevent the workpiece or workpiece fixture from warping, causing the sealing welding center to deviate too much.

[0028] The utility model also provides a soft bag sealing device, which includes the above-mentioned positioning top fork for sealing the soft bag and has the same beneficial effects, which will not be described in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0030] Figure 1 It is a schematic diagram of a design scheme in the prior art;

[0031] Figure 2 It is a top view of a design solution in the prior art;

[0032] Figure 3 This is a schematic diagram of the structure of the positioning top fork for sealing a soft bag provided by the utility model;

[0033] Figure 4A top view of the positioning top fork for sealing a soft bag provided by the utility model;

[0034] Figure 5 This is an enlarged view of point A provided by the utility model;

[0035] Figure 6 This is a schematic diagram of the structure of the soft bag sealing device provided by the utility model;

[0036] Figure 7 This is an enlarged view of point B provided by the utility model.

[0037] Figure 1-Figure 7 middle:

[0038] 1. Positioning top fork; 101. Center positioning top fork; 101a. Positioning surface; 102. Anti-warping pressure fork; 102a. Limiting surface; 103. Extended mounting arm; 104. First circulating water channel; 2. Soft bag fixing clamp; 3. Capping head assembly; 4. Heating assembly; 5. Support assembly; 501. Sliding bar; 502. Second circulating water channel. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] The core of the utility model is to provide a positioning top fork for sealing a soft bag, which adopts a design combining a central positioning top fork and an anti-warping pressure fork. The central positioning top fork contacts and positions the workpiece to ensure the positioning effect of the workpiece. At the same time, the anti-warping pressure fork presses down the free end of the soft bag fixing clamp to prevent it from warping up, thereby avoiding the workpiece contact and fire caused by the upward warping and collision with the heating plate during positioning, thereby ensuring production safety.

[0041] Another core of the utility model is to provide a soft bag sealing device including the positioning top fork for sealing the soft bag, which solves the same technical problem and achieves the same purpose.

[0042] Please refer to Figure 3-Figure 7 , a positioning top fork for sealing a soft bag, comprising:

[0043] A center positioning top fork 101, wherein a positioning surface 101a is provided at the front end of the center positioning top fork 101, and the positioning surface 101a is used to contact with the workpiece;

[0044] Anti-warping pressure fork 102, two groups of anti-warping pressure forks 102 are respectively arranged on both sides of the central positioning top fork 101, and the rear end of the anti-warping pressure fork 102 is fixedly connected to the rear end of the central positioning top fork 101, and a limited position surface is set at the front end of the anti-warping pressure fork 102, and the limiting surface 102a is used to prevent the free end of the workpiece or the workpiece fixture from warping up.

[0045] During the production process, the workpiece fixture is mostly a V-block structure, that is, a positioning groove design with an open end. After the workpiece is placed in, a force needs to be applied from the open side of the positioning groove to push the workpiece so that it can obtain a good positioning relationship in the positioning groove; that is, the positioning fork is driven by the driving mechanism to move it close to the workpiece fixture and apply force to the workpiece. Usually, in order to reduce the difficulty of installing the positioning fork, an extended installation arm 103 is installed behind the positioning fork. At the same time, the distance between the driving mechanism and the workpiece fixture is also increased to avoid the influence of the actuator at the processing station on the driving mechanism, which is mainly due to thermal radiation.

[0046] In this embodiment, the workpiece fixture is a soft bag fixing clamp 2, and the workpiece is an infusion soft bag. When positioning, the interface of the infusion soft bag is placed in the soft bag fixing clamp 2, and a force is applied to the interface of the infusion soft bag through the center positioning top fork 101, that is, the positioning surface 101a contacts the interface of the infusion soft bag, so that the interface of the infusion soft bag is simultaneously in contact with the two side walls of the positioning groove in the soft bag fixing clamp 2, so as to obtain a centering relationship between the interface of the infusion soft bag and the outer cover;

[0047] like Figure 6 As shown, when the positioning surface 101a contacts the interface of the infusion bag, too small a contact force is insufficient to achieve a good positioning relationship between the infusion bag interface and the soft bag fixing clip 2, and there may be a certain gap between the positioning surface of the soft bag fixing clip 2, that is, the centering relationship between the infusion bag interface and the outer cover is not good; therefore, the contact force between the positioning surface 101a and the infusion bag interface needs to be increased, and too large a contact force will cause the free end of the soft bag fixing clip 2 to warp up. After warping up, the gap between the free end of the soft bag fixing clip 2 and the heating component 4 above for heating the infusion bag interface is reduced, or directly contacted, and affected by the high temperature of the heating component 4, the soft bag fixing clip 2 will collide, or heat will be transferred through the soft bag fixing clip 2, and the high temperature will damage the infusion bag or the interface of the infusion bag;

[0048] Therefore, adding the anti-warping pressure fork 102 can prevent the soft bag fixing clamp 2 from deforming in the normal direction when the force applied to the positioning surface 101a is too large. In the present embodiment, the deformation in the normal direction is upward warping, while in some embodiments, the deformation in the normal direction can be in any direction perpendicular to the force applied to the positioning surface 101a. Usually, to solve this problem, a limit member for limiting the position is provided on the side of the soft bag fixing clamp 2. The position of the limit member should be a position that does not affect the movement of the soft bag fixing clamp 2 to avoid interfering with its movement. At the same time, it should also be ensured that the limit member does not interfere with other moving parts.

[0049] like Figure 4 As shown, the positioning surface 101a is a contoured surface that matches the shape of the positioning and clamping contact surface of the workpiece, or the positioning surface 101a is an arc shape;

[0050] In actual production, the soft bag fixing clamp 2 mostly adopts a V-shaped positioning block, and the interface of the infusion soft bag is fixed in the positioning groove, which requires the central positioning top fork 101 to be inserted into the positioning groove and to conflict with the interface of the infusion soft bag. In other words, the width of the central positioning top fork 101 is required to be smaller than the opening width of the positioning groove of the soft bag fixing clamp 2, and the positioning surface 101a has a relatively stable contact relationship with the contact position of the infusion soft bag interface, and no relative sliding occurs. In some embodiments, the positioning surface 101a adopts an arc design with the same arc as the contact position of the infusion soft bag interface. For example, when the infusion soft bag interface is circular, the positioning surface 101a adopts an arc design, and a V-shaped groove design can also be adopted, both of which can achieve accurate positioning of the infusion soft bag interface. However, when the infusion soft bag interface is irregular, such as a triangle, a square, etc., it is necessary to design the shape of the positioning surface 101a of the central positioning top fork 101 according to the specific shape of the positioning clamping contact surface to ensure that the positioning surface 101a has a good contact relationship with the infusion soft bag interface.

[0051] In other embodiments, the positioning surface 101a uses a three-point positioning method to set three positioning points on different lines for contacting the positioning and clamping contact surface of the workpiece.

[0052] The limiting surface 102a is higher than the upper edge of the workpiece positioning and clamping contact surface and / or higher than the upper edge of the free end of the workpiece fixture;

[0053] In some embodiments, the workpiece is not completely clamped and fixed. When it is subjected to external force, its unfixed part will be deformed to a certain extent, such as warping. Therefore, a limiting surface 102a is added to act on the top of the workpiece to prevent it from warping. This requires that the initial height of the limiting surface 102a is higher than the initial highest point of the warped position of the workpiece.

[0054] In other implementations, the workpiece is completely wrapped by the clamp. Due to the limitation of the material or structural properties of the clamp itself, the clamp itself is not rigid enough. Therefore, when the workpiece is clamped, the workpiece clamp itself is deformed. Therefore, it is necessary to increase the anti-warping pressure fork 102 to limit it and avoid its deformation. For the soft bag fixing clamp 2, the main form of its deformation is the upward warping of the free end. To avoid its upward warping, it is required to set a limiting surface 102a above the free end of the soft bag fixing clamp 2. At the same time, to avoid interference with the horizontal movement of the soft bag fixing clamp 2, it is required that the limiting surface 102a is higher than the upper edge of the free end of the soft bag fixing clamp 2.

[0055] In some embodiments, when the workpiece fixture is deformed, the workpiece will be deformed synchronously. Such workpieces are mainly thin-walled, and in some cases, the height of the workpiece at the deformed position is originally higher than the workpiece fixture. This requires that the limit surface 102a must be higher than the initial upper edge of the workpiece and the workpiece fixture at the deformation position at the same time to achieve the purpose of suppressing the warping of the workpiece and the workpiece fixture.

[0056] When designing the anti-warping pressure fork 102, a moving component design is generally adopted, that is, it is not absolutely fixed on the frame, and most of them move synchronously with the center positioning top fork 101. When contacting and positioning the workpiece, the anti-warping pressure fork 102 also synchronously contacts the restrictions on the workpiece and the workpiece fixture, that is, there is a relative motion relationship between the anti-warping pressure fork 102 and the workpiece or the workpiece fixture, and the anti-warping pressure fork 102 needs to be arranged above the workpiece or the workpiece fixture to achieve its purpose, but there is a relative motion relationship between the two. If the gap between the two is small, it may be affected by problems such as assembly accuracy and equipment deformation, causing interference in the movement of the two; if the gap between the two is too large, the anti-warping effect of the anti-warping pressure fork 102 on the workpiece or the workpiece fixture will be reduced, that is, the workpiece or the workpiece fixture may still be warped, but the warping amplitude is reduced. Corresponding to this embodiment, the soft bag fixing clamp 2 still has an upward stroke and can be close to the upper heating plate, and there is a possibility of fire;

[0057] Therefore, in some embodiments, the limiting surface 102a is a chamfered surface or a rounded arc surface; by changing the structure of the limiting surface 102a and adopting a chamfered surface or a rounded arc surface design, when the workpiece or the workpiece fixture and the anti-warping pressure fork 102 approach each other, the gap between the two gradually decreases, thereby solving the problem of interference between the two during movement and avoiding the problem of excessive gap between the two.

[0058] In actual operation, after the workpiece is positioned and clamped, the subsequent process operation is performed, which is often accompanied by a large force. Combined with the welding of the interface and the outer cover of the infusion soft bag, such as Figure 6As shown, the process operation is that the upper capping head assembly 3 falls down, and the inner outer cover is pressed into contact with the infusion soft bag interface in the soft bag fixing clamp 2, so that the two are naturally cooled from the molten state to achieve welding. After the welding is completed, the capping head assembly 3 is reset. During the process, there is still a certain pulling force on the outer cover, and this force will drive the infusion soft bag and the soft bag fixing clamp 2 to jump up. Therefore, it is necessary to apply a downward pre-tightening force to the soft bag fixing clamp 2 to avoid this problem.

[0059] Therefore, in some embodiments, the anti-warping pressure fork 102 is fixedly connected to the central positioning top fork 101 in the form of a cantilever beam;

[0060] That is, after the center positioning top fork 101 contacts the infusion soft bag interface for positioning and clamping, the anti-warping pressure fork 102 contacts the upper end surface of the free end of the soft bag fixing clamp 2. During the process, since the anti-warping pressure fork 102 is installed in a cantilever form and the limiting surface 102a is a chamfered angle surface or a rounded arc surface, as the overlap between the soft bag fixing clamp 2 and the limiting surface 102a increases, the anti-warping pressure fork 102 will produce elastic deformation upward to apply a pre-tightening force to the soft bag fixing clamp 2, thereby preventing the capping head assembly 3 from causing the infusion soft bag and the soft bag fixing clamp 2 to jump upward during the resetting process.

[0061] In some embodiments, the front end of the center positioning top fork 101 protrudes from the anti-warping pressure forks 102 on both sides; that is, the working order of the center positioning top fork 101 and the anti-warping pressure fork 102 is that the center positioning top fork 101 first penetrates into the positioning groove of the soft bag fixing clamp 2, and then interferes with the infusion soft bag interface. Before the center positioning top fork 101 contacts the infusion soft bag interface and completes the positioning and clamping, the anti-warping pressure fork 102 will not contact the soft bag fixing clamp 2, or the anti-warping pressure fork 102 will not generate a downward pressing force on the soft bag fixing clamp 2, thereby avoiding the deformation of the soft bag fixing clamp 2 caused by the anti-warping pressure fork 102 first contacting the soft bag fixing clamp 2, thereby causing the problem of poor alignment between the infusion soft bag interface and the outer cover.

[0062] In actual use, Figure 6 As shown, the heating component 4 is used to heat the outer cover in the capping head component 3 and the infusion soft bag interface in the soft bag fixing clamp 2. During the process, the center positioning top fork 101 and the anti-warping pressure fork 102 are relatively close to the heating component 4 and are also subjected to heat radiation and have a certain temperature rise. When the temperature rise is large, there is a risk of scalding the infusion soft bag interface and the soft bag fixing clamp 2.

[0063] Therefore, in some embodiments, an extended mounting arm 103 is also included, and the extended mounting arm 103 is integrally formed with the central positioning top fork 101 and the anti-warping pressure fork 102, and a first circulating water channel 104 for heat dissipation is arranged in the extended mounting arm 103.

[0064] By forming the extended mounting arm 103, the center positioning top fork 101 and the anti-warping pressure fork 102 in one piece and using materials with high thermal conductivity, such as aluminum alloy, the heat can be quickly transferred to the extended mounting arm 103 at the rear end, and the heat is dissipated through the extended mounting arm 103. Furthermore, in order to improve the heat dissipation effect, a water channel, such as a first circulating water channel 104, can be opened in the extended mounting arm 103, and a circulating refrigerant flows through the inside to quickly take away the heat in the extended mounting arm 103. The interface of the first circulating water channel 104 is preferably a high-temperature resistant joint to avoid the heat being directly transferred to the joint through the extended mounting arm 103, causing it to melt or increase the gap at the interface, resulting in refrigerant leakage.

[0065] At the same time, in some embodiments, heat dissipation fins are provided on the surface of the extended mounting arm 103, and heat is dissipated by air cooling, or a heat dissipation pipe is wrapped around the outside of the extended mounting arm 103 and a refrigerant is circulated inside. The purpose is to quickly take away the heat of the extended mounting arm 103, the center positioning top fork 101 and the anti-warping pressure fork 102 by heat exchange, so as to slow down the temperature rise rate and prevent the infusion soft bag from being scalded.

[0066] In addition to the positioning top forks for sealing a soft bag disclosed in the above-mentioned embodiments, the utility model also provides a soft bag sealing device including the positioning top forks for sealing a soft bag.

[0067] like Figure 6 and Figure 7 As shown, it also includes a soft bag fixing clip 2 and a supporting assembly 5;

[0068] The soft bag fixing clamp 2 is used for clamping the workpiece;

[0069] The support assembly 5 is used to support the soft bag fixing clamp 2 in the positioning state and the positioning top fork for sealing the soft bag;

[0070] When the capping head assembly 3 drives the outer cover to weld the infusion soft bag interface inside the soft bag fixing clamp 2, there is a large relative force between the two, which will cause the soft bag fixing clamp 2 to have a tendency to move downward. Therefore, a support assembly 5 is arranged under the soft bag fixing clamp 2, which provides an upward support force for the soft bag fixing clamp 2 to balance the downward force applied by the capping head assembly 3 and prevent the soft bag fixing clamp 2 from bending and deforming downward.

[0071] Further, such as Figure 7 As shown, the working surface of the support assembly 5 is provided with a sliding bar 501, the sliding bar 501 is made of a material with a low friction coefficient, and a second circulating water channel 502 for heat dissipation is provided inside the sliding bar 501;

[0072] After welding, the soft bag fixing clamp 2 needs to move horizontally, and the support assembly 5 is fixedly installed with the frame, that is, there is relative movement between the two. Therefore, a sliding bar 501 made of a low friction coefficient material is arranged between the contact surfaces of the two to reduce the sliding friction between the two. For example, a tin bronze sliding bar is used, which has the advantage of wear resistance.

[0073] At the same time, since the soft bag fixing clamp 2 is also subjected to high temperature baking during the welding process, there is also a risk of burning the infusion soft bag when the temperature is high. Therefore, the second circulating water channel 502 is integrated in the sliding bar 501, or the second circulating water channel 502 is directly integrated in the supporting component 5, and a circulating refrigerant is introduced into the second circulating water channel 502 to take away the heat in the supporting component 5 and the sliding bar 501 by heat exchange, so that when the supporting component 5 and the sliding bar 501 contact the soft bag fixing clamp 2, the heat in the soft bag fixing clamp 2 is taken away, the temperature rise rate is slowed down, and the surface temperature is reduced.

[0074] For the structures of other parts of the soft bag sealing device, please refer to the prior art and will not be described in detail herein.

[0075] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0076] The above is a detailed introduction to the positioning top fork for sealing a soft bag and the soft bag sealing device provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A positioning top fork for sealing a soft bag, characterized in that: include: A center positioning top fork (101), wherein a positioning surface (101a) is provided at the front end of the center positioning top fork (101), and the positioning surface (101a) is used to abut against a workpiece; An anti-warping pressure fork (102), wherein two anti-warping pressure forks (102) are respectively arranged on both sides of the central positioning top fork (101), and the rear ends of the anti-warping pressure forks (102) are fixedly connected to the rear end of the central positioning top fork (101), and the front ends of the anti-warping pressure forks (102) are provided with a limiting surface (102a), and the limiting surface (102a) is used to prevent the free end of the workpiece or the workpiece fixture from warping up.

2. The positioning top fork for sealing a soft bag according to claim 1, characterized in that: The positioning surface (101a) is a contoured surface that matches the shape of a positioning and clamping contact surface of the workpiece, or the positioning surface (101a) is in an arc shape.

3. The positioning top fork for sealing a soft bag according to claim 1, characterized in that: The limiting surface (102a) is higher than the upper edge of the workpiece positioning and clamping contact surface and / or higher than the upper edge of the free end of the workpiece clamp.

4. The positioning top fork for sealing a soft bag according to claim 3, characterized in that: The limiting surface (102a) is a chamfered surface or a rounded arc surface.

5. The positioning top fork for sealing a soft bag according to claim 4, characterized in that: The anti-warping pressure fork (102) is fixedly connected to the central positioning top fork (101) in the form of a cantilever beam.

6. The positioning top fork for sealing a soft bag according to claim 1, characterized in that: The front end of the central positioning top fork (101) protrudes beyond the anti-warping pressure forks (102) on both sides.

7. The positioning top fork for sealing a soft bag according to claim 1, characterized in that: It also comprises an extended mounting arm (103), wherein the extended mounting arm (103) is integrally formed with the central positioning top fork (101) and the anti-warping pressure fork (102), and a first circulating water channel (104) for heat dissipation is arranged in the extended mounting arm (103).

8. A soft bag sealing device, characterized in that: The invention comprises the positioning top fork for sealing a soft bag as described in any one of claims 1 to 7.

9. The soft bag sealing device according to claim 8, characterized in that: Also included is a soft bag fixing clip (2) and a supporting assembly (5); The soft bag fixing clamp (2) is used to clamp the workpiece; The support assembly (5) is used to support the soft bag fixing clamp (2) and the soft bag sealing positioning top fork in a positioned state.

10. The soft bag sealing device according to claim 9, characterized in that: The working surface of the support assembly (5) is provided with a sliding bar (501), the sliding bar (501) is made of a material with a low friction coefficient, and a second circulating water channel (502) for heat dissipation is provided inside the sliding bar (501).

Images