Cooling water ring lifting mechanism of film blowing equipment
By setting up a tarp cloth and a double-head zipper in the cooling water ring lifting mechanism of the film blowing equipment, the lubricant oil pollution problem caused by the splashing of the cooling water ring is solved, and strict control of the production environment of medical and pharmaceutical membranes is achieved.
Patent Information
- Application Number
- CN202421743233.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-23
AI Technical Summary
In existing film blowing equipment, the water flow of the cooling water ring is prone to splashing on the screw mechanism and guide mechanism during the vertical position adjustment process, resulting in lubricating oil contamination on the surface of the membrane bubble. This pollution needs to be avoided especially when producing medical or pharmaceutical films.
A cooling water ring lifting mechanism is designed. By setting a tarp on the front side of the vertical rectangular frame and a double-headed vertical zipper is provided in the middle of the tarp. The zipper head is fixedly connected to the movable vertical plate to ensure that the movable vertical plate is blocked in front of the zipper opening and preventing water from entering the vertical rectangular frame.
It effectively avoids the water flow of the cooling water ring splashing on the vertical guide rod and screw mechanism, basically eliminating the possibility of lubricating oil contamination on the surface of the plastic film, and meeting the strict requirements for pollution in medical and pharmaceutical film production.
Smart Images
Figure CN222972608U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of plastic film production equipment, and particularly relates to a lifting mechanism for a cooling water ring of a film blowing device. Background Art
[0002] Plastic films can be produced by a downblowing film blowing machine. During the production process of the downblowing film blowing machine, high-temperature molten plastic materials are continuously extruded from an annular extrusion port to form an annular film bubble, and the extruded film bubble continuously moves downward. The just-extruded film bubble has a relatively high temperature, and it is necessary to use a cooling water ring to cool the film bubble. Specifically, the film bubble passes through the center of the cooling water ring, and the cooling water continuously overflows from the cooling water ring to form an annular water curtain, and the annular water curtain flows through the surface of the annular film bubble to cool it.
[0003] During the production process, when process parameters such as the film bubble diameter, extrusion speed, extrusion temperature, film bubble thickness, and film bubble material change, the vertical position of the cooling water ring must be adjusted accordingly to obtain the most suitable condensation and forming effect. In order to enable the vertical position of the cooling water ring to be adjusted, the existing installation structure for lifting the cooling water ring of the film blowing device includes a cooling water ring, a fixed horizontal support plate that does not move, and a fixed vertical rectangular frame; a circular through hole for the film bubble to pass through is provided in the middle of the fixed horizontal support plate, and a vertical guide rod and a vertical lead screw are provided inside the vertical rectangular frame; an active horizontal support plate can be vertically movably installed above the fixed horizontal support plate, and a notch for accommodating the film bubble is provided on the active horizontal support plate. The cooling water ring is installed on the active horizontal support plate and moves vertically synchronously with the active horizontal support plate; the active horizontal support plate is fixedly connected with a guide block and a nut block. The guide block can be vertically slidably installed on the vertical guide rod, and the nut block is screwed onto the vertical lead screw; in this way, the active horizontal support plate can move vertically under the guiding action of the vertical guide rod and the driving of the lead screw mechanism, that is, the rotation of the lead screw drives the nut block to move vertically, the vertical movement of the nut block drives the active horizontal support plate to move vertically, and the vertical movement of the active horizontal support plate drives the cooling water ring to move vertically.
[0004] Obviously, lubricating oil needs to be applied to the above-mentioned lead screw mechanism and guiding mechanism to maintain lubrication and reduce friction. However, on the other hand, in the prior art, the water curtain of the above-mentioned cooling water ring will inevitably have irregular fluctuations and deviations in the flow direction of a part of the water flow, and splash onto the lead screw mechanism and guiding mechanism inside the vertical rectangular frame, thereby washing away the lubricating oil on the surfaces of the lead screw mechanism and guiding mechanism. This part of the water flow containing lubricating oil continues to flow downward and then flows over the surface of the film bubble, and will then adhere to the surface of the film bubble, contaminating the film bubble surface with lubricating oil. For plastic films for general purposes, since there is not much lubricating oil contaminating the film surface, the problem is not significant. However, in recent years, more and more users of medical films (such as films for producing infusion bags) and pharmaceutical films require avoiding or reducing the above-mentioned problem of lubricating oil contamination. Summary of the Invention
[0005] The object of the present invention is to overcome the above-mentioned drawbacks and provide a lifting mechanism for the cooling water ring of a film blowing device, which can basically eliminate the possibility of the lubricating oil of the lead screw mechanism and guiding mechanism contaminating the plastic film surface.
[0006] Its object can be achieved according to the following solution: A lifting mechanism for the cooling water ring of a film blowing device, including a cooling water ring, a fixed horizontal support plate that does not move, and a fixed vertical rectangular frame. The lower part of the vertical rectangular frame is fixedly connected to the rear end of the fixed horizontal support plate. A circular through-hole for the film bubble to pass through is provided in the middle of the fixed horizontal support plate; An active horizontal support plate can be vertically movably installed above the fixed horizontal support plate. The active horizontal support plate is provided with a notch for the film bubble to pass through. The cooling water ring is installed on the active horizontal support plate and moves vertically synchronously with the active horizontal support plate; A lead screw mechanism for driving the active horizontal support plate to move up and down is also installed on the vertical rectangular frame. The lead screw mechanism includes a vertical lead screw, a nut block, and a lead screw motor for driving the vertical lead screw to rotate. The nut block is screwed onto the vertical lead screw, and the vertical lead screw is installed inside the vertical rectangular frame;
[0007] It is characterized in that an active vertical plate is further provided. The upper edge of the active vertical plate is fixedly connected to the rear edge of the active horizontal support plate, and the active vertical plate moves vertically synchronously with the active horizontal support plate; The nut block is fixedly connected to the active vertical plate by a first connecting block; A waterproof cloth is provided on the front side of the vertical rectangular frame. The waterproof cloth is located in front of the vertical lead screw and behind the active vertical plate; A number of vertical zippers are provided in the middle of the waterproof cloth. The vertical zippers are double-headed zippers; Each vertical zipper is provided with two zipper heads, an upper zipper head and a lower zipper head. The upper zipper head is fixedly connected to the upper part of the active vertical plate, and the lower zipper head is fixedly connected to the lower part of the active vertical plate. The two zipper heads move vertically synchronously with the active vertical plate; The first connecting block of the nut block passes through the zipper opening between the upper and lower zipper heads of the corresponding vertical zipper.
[0008] Inside the vertical rectangular frame, there are vertical guide rods. Guide blocks are installed on the vertical guide rods in a vertically slidable manner. Each guide block is fixedly connected to the movable vertical plate by a second connecting block. The vertical guide rods are located behind the waterproof cloth, and the second connecting blocks of each guide block pass through the zipper opening between the upper and lower zipper heads of the corresponding vertical zipper.
[0009] A left support plate is connected between the left edge of the movable horizontal support plate and the left edge of the movable vertical plate, and a right support plate is connected between the right edge of the movable horizontal support plate and the right edge of the movable vertical plate.
[0010] The utility model has the following advantages and effects:
[0011] First, the vertical guide rods and vertical lead screws are located in the vertical rectangular frame, and a waterproof cloth is provided between the vertical guide rods, vertical lead screws and the running track of the film bubble. Therefore, it is basically possible to prevent the water flow of the cooling water ring from splashing onto the vertical guide rods and vertical lead screws, and further basically eliminate the possibility of lubricating oil contaminating the surface of the plastic film.
[0012] Second, the waterproof cloth is provided with a double-headed vertical zipper. The first connecting block of the nut block / the second connecting block of the guide block passes through the zipper opening between the upper and lower zipper heads of the vertical zipper. Moreover, the upper zipper head is fixedly connected to the upper part of the movable vertical plate, and the lower zipper head is fixedly connected to the lower part of the movable vertical plate. Therefore, during the vertical adjustment and movement of the cooling water ring, the movable horizontal support plate, the movable vertical plate, and the upper and lower zipper heads move vertically synchronously. The movable vertical plate always remains just in front of the zipper opening between the upper and lower zipper heads, and the longitudinal position of the movable vertical plate is close to the zipper opening of the vertical zipper. The movable vertical plate plays a role in blocking water in front of the zipper opening, preventing water flow from entering the vertical rectangular frame through the zipper opening. In short, on the premise of maintaining the use of the screw mechanism and the guiding mechanism to drive the movable horizontal support plate and the cooling water ring to perform vertical position adjustment and movement, the utility model can avoid the possibility of the water flow of the cooling water ring splashing onto the vertical guide rods and vertical lead screws, and further basically eliminate the possibility of the lubricating oil of the screw mechanism and the guiding mechanism contaminating the surface of the plastic film. Description of the Drawings
[0013] Figure 1 It is a schematic cross-sectional structure and working state diagram of an embodiment of the utility model.
[0014] Figure 2 It is a schematic three-dimensional structure diagram after hiding the cooling water ring and the film bubble of the shown structure.
[0015] Figure 3 It is Figure 2 The enlarged schematic diagram of part D in
[0016] Figure 4 It is a schematic structure diagram of the double-headed zipper.
[0017] Figure 5 is Figure 2 The front view schematic diagram of the structure shown
[0018] Figure 6 is Figure 5 The schematic diagram of the A-A sectional structure in
[0019] Figure 7 is Figure 5 The schematic diagram of the B-B sectional structure in
[0020] Figure 8 is Figure 5 The schematic diagram of the C-C sectional structure in
[0021] Figure 9 is Figure 6 The enlarged schematic diagram of the partial G in
[0022] Figure 10 is Figure 7 The enlarged schematic diagram of the partial E in
[0023] Figure 11 is Figure 8 The enlarged schematic diagram of the partial F in Specific implementation mode
[0024] Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 , Figure 8 A lifting mechanism for the cooling water ring of a blown film device shown, including a cooling water ring 9, a fixed horizontal support plate 2 that does not move, and a fixed vertical rectangular frame 1. The lower part of the vertical rectangular frame 1 is fixedly connected to the rear end of the fixed horizontal support plate 2. A circular through hole 20 for the film bubble 8 to pass through is provided in the middle of the fixed horizontal support plate 2; An active horizontal support plate 3 is vertically movably installed above the fixed horizontal support plate 2. The active horizontal support plate 3 is provided with a notch 30 for accommodating the film bubble 8 to pass through. The cooling water ring 9 is installed on the active horizontal support plate 3 and moves vertically synchronously with the active horizontal support plate 3;
[0025] Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 As shown, a lead screw mechanism for driving the active horizontal support plate 3 to move up and down is also installed on the vertical rectangular frame 1. The lead screw mechanism includes a vertical lead screw 41, a nut block 42, and a lead screw motor 43 for driving the vertical lead screw to rotate. The nut block 42 is screwed onto the vertical lead screw 41; The vertical lead screw 41 is installed inside the vertical rectangular frame 1;
[0026] Figure 2 and Figure 5 and Figure 7 and Figure 8 and Figure 9 and Figure 10 and Figure 11 As shown in , a movable vertical plate 31 is further provided. The upper edge of the movable vertical plate 31 is fixedly connected to the rear edge of the movable horizontal support plate 3. A left support plate 21 is fixedly connected between the left edge of the movable horizontal support plate 3 and the left edge of the movable vertical plate 31, and a right support plate 22 is fixedly connected between the right edge of the movable horizontal support plate 3 and the right edge of the movable vertical plate 31. The movable vertical plate 31 moves vertically synchronously with the movable horizontal support plate 3; the nut block 42 is fixedly connected to the movable vertical plate 31 by two left and right first connecting blocks 44, so that the nut block 42 forms a fixed connection relationship with the movable horizontal support plate 3.
[0027] Figure 2 and Figure 4 and Figure 5 and Figure 9 and Figure 10 and Figure 11 As shown in , a waterproof cloth 6 is provided on the front side of the vertical rectangular frame 1. The waterproof cloth 6 is located in front of the vertical lead screw 41 and behind the movable vertical plate; four vertical zippers 7 are provided in the middle of the waterproof cloth 6, and the vertical zippers 7 are double-headed zippers; each vertical zipper 7 is provided with two upper and lower zipper heads, and the zipper section between the two upper and lower zipper heads is opened to form a zipper opening 70, while the zipper section above the upper zipper head 71 remains closed, and the zipper section below the lower zipper head 72 also remains closed; the upper zipper head 71 is fixedly connected to the upper part of the movable vertical plate 31 by a rivet 73, as Figure 3 shown, the lower zipper head 72 is similarly fixedly connected to the lower part of the movable vertical plate 31 by a rivet, and the two upper and lower zipper heads move vertically synchronously with the movable vertical plate 31; each first connecting block 44 passes through the zipper opening 70 between the two upper and lower zipper heads of a corresponding vertical zipper 7, that is, the two first connecting blocks 44 pass through Figure 6 the zipper openings of the two middle vertical zippers 7 in
[0028] Figure 6 and Figure 8 and Figure 9 and Figure 11Inside the vertical rectangular frame 1, there are two vertical guide rods 51 on the left and right. Each vertical guide rod 51 is equipped with two upper and lower guide blocks 52. The guide blocks 52 are slidably mounted on the corresponding vertical guide rods 51 vertically; each guide block 52 is fixedly connected to the movable vertical plate 31 by a second connecting block 54; the vertical guide rods 51 are located behind the waterproof cloth 6. The upper and lower second connecting blocks 54 of each guide block pass through the zipper opening 70 between the upper and lower zipper heads of a corresponding vertical zipper 7, that is, the second connecting blocks 54 of the two guide blocks 52 pass through Figure 6 the zipper openings of the two vertical zippers 7 located on the outer side in the horizontal direction in
[0029] The working principle of the above embodiment is as follows:
[0030] During the production process, the film bubble 8 passes through the middle of the cooling water ring 9 and passes through the circular through-hole 20 of the fixed horizontal support plate and the notch 30 of the movable horizontal support plate, as Figure 1 shown; during the vertical position adjustment and movement of the movable horizontal support plate 3 and the cooling water ring 9, the upper and lower zipper heads move vertically synchronously with the movable vertical plate 31, so that the vertical position of the zipper opening 70 between the upper and lower zipper heads always remains aligned with the movable vertical plate 31, that is, the movable vertical plate 31 always remains just in front of the zipper opening 70 between the upper and lower zipper heads, and the longitudinal position of the movable vertical plate 31 is close to the zipper opening 70 of the vertical zipper 7. The movable vertical plate 31 plays a role in blocking water in front of the zipper opening 70, basically preventing water from entering the inside of the vertical rectangular frame 1 through the zipper opening 70, and preventing water from flushing the screw mechanism and the guiding mechanism.
Claims
1. A cooling water ring lifting mechanism for film blowing equipment, comprising a cooling water ring, a fixed horizontal support plate and a fixed vertical rectangular frame, the lower part of the vertical rectangular frame is fixedly connected to the rear end of the fixed horizontal support plate, and a circular through hole for film bubbles to pass through is provided in the middle of the fixed horizontal support plate; a movable horizontal support plate is vertically movably installed above the fixed horizontal support plate, and the movable horizontal support plate is provided with a notch for accommodating film bubbles to pass through, the cooling water ring is installed on the movable horizontal support plate and moves vertically synchronously with the movable horizontal support plate; a screw mechanism for driving the movable horizontal support plate to move up and down is also installed on the vertical rectangular frame, the screw mechanism comprises a vertical screw, a nut block, and a screw motor for driving the vertical screw to rotate, the nut block is screwed on the vertical screw, and the vertical screw is installed inside the vertical rectangular frame; Features: A movable vertical plate is also provided, the upper edge of the movable vertical plate is fixedly connected to the rear edge of the movable horizontal bracket plate, and the movable vertical plate and the movable horizontal bracket plate move vertically synchronously; the nut block is fixedly connected to the movable vertical plate by a first connecting block; a waterproof cloth is provided on the front side of the vertical rectangular frame, and the waterproof cloth is located in front of the vertical screw rod and behind the movable vertical plate; a plurality of vertical zippers are provided in the middle of the waterproof cloth, and the vertical zippers are double-head zippers; each vertical zipper is provided with an upper and lower zipper heads, the upper zipper head is fixedly connected to the upper part of the movable vertical plate, and the lower zipper head is fixedly connected to the lower part of the movable vertical plate, and the upper and lower zipper heads move vertically synchronously with the movable vertical plate; the first connecting block of the nut block passes through the zipper opening between the upper and lower zipper heads of the corresponding vertical zipper.
2. The cooling water ring lifting mechanism for film blowing equipment according to claim 1, characterized in that: A vertical guide rod is provided inside the vertical rectangular frame, and a guide block is installed on the vertical guide rod so as to be vertically slidable. Each guide block is fixedly connected to the movable vertical plate by a second connecting block. The vertical guide rod is located behind the waterproof cloth, and the second connecting block of each guide block passes through the zipper opening between the upper and lower zipper heads of the corresponding vertical zipper.
3. A cooling water ring lifting mechanism for film blowing equipment according to claim 1 or 2, characterized in that: A left side support plate is connected between the left edge of the movable horizontal bracket plate and the left edge of the movable vertical plate, and a right side support plate is connected between the right edge of the movable horizontal bracket plate and the right edge of the movable vertical plate.