Anti-sticking sizing sleeve for manufacturing PVC (polyvinyl chloride) pipe
The combined design of the diverter water jacket, sizing copper sleeve and shaping lamination solves the problem of raw material precipitation during the cooling and sizing process of PVC pipes, achieving high-quality pipe forming and low scrap rate.
Patent Information
- Application Number
- CN202422964757.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-12-02
AI Technical Summary
In the production of PVC pipes, raw materials containing calcium-zinc stabilizers are prone to precipitation during the cooling and sizing process, resulting in poor pipe molding quality and high product scrap rate.
The anti-sticking sizing sleeve structure including the diverter water jacket, sizing copper sleeve and shaping lamination is adopted. Through the combined design of cooling water channel cooling, vacuum suction and shaping lamination, the precipitation of raw materials is reduced and the quality of pipe forming is ensured.
It effectively prevents the precipitation of raw materials, improves the surface smoothness of the pipe, reduces the scrap rate, and ensures the cooling and shaping effect of the pipe.
Smart Images
Figure CN223407433U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of PVC pipe manufacturing equipment and relates to an anti-sticking sizing sleeve used for manufacturing PVC pipes. Background Art
[0002] PVC pipes are very common in today's life. They are generally produced by extrusion molding using an extruder. Stabilizers are indispensable as base materials in the production of pipes. Nowadays, in response to environmentally friendly production requirements, the use of calcium-zinc stabilizers instead of lead-containing stabilizers has become the mainstream production method.
[0003] However, raw materials containing calcium zinc stabilizers are more likely to precipitate during the cooling and sizing process, which will directly affect the molding quality of the pipe, causing the outer surface of the pipe to be uneven, seriously affecting the service life of the pipe. At the same time, during the pipe extrusion molding process, the raw materials precipitated and retained in the sizing sleeve have a certain hardness after cooling and solidification, which will cause the subsequent extruded pipes to be scratched by them, resulting in an increase in the product scrap rate. Summary of the Invention
[0004] The purpose of the utility model is to address the above-mentioned problems in the existing technology and propose an anti-sticking sizing sleeve for manufacturing PVC pipes. The technical problem to be solved by the utility model is: how to reduce the precipitation of components while ensuring the cooling and shaping effect of PVC pipes.
[0005] The purpose of the utility model can be achieved through the following technical solutions: an anti-sticking sizing sleeve for manufacturing PVC pipes, comprising a diverter water jacket in a tubular shape with a cooling water channel opened inside and a tubular sizing copper sleeve, characterized in that the anti-sticking sizing sleeve for manufacturing PVC pipes also includes a plurality of annular shaping laminates, the diverter water jacket is connected to one end of the sizing copper sleeve, and the plurality of shaping laminates are positioned at the other end of the sizing copper sleeve, the diverter water jacket, the sizing copper sleeve and the plurality of shaping laminates are coaxially arranged, and the plurality of shaping laminates are spaced apart along the length direction of the sizing copper sleeve.
[0006] The working principle of the anti-sticking sizing sleeve used for manufacturing PVC pipes is as follows: the extruded pipe passes through the diverter water jacket and the sizing copper sleeve in sequence, and is finally formed after passing through the inner holes of several shaping laminates. In this process, when the pipe enters the diverter water jacket, cooling water is passed through the cooling water channel in the diverter water jacket, so that the cooling water and the pipe can fully exchange heat to achieve preliminary cooling of the pipe. Then, when the pipe is input into the sizing copper sleeve, specifically, the sizing copper sleeve is an existing technology, and a plurality of vacuum holes are opened on its outer wall along the circumference to communicate with the internal cavity. After the pipe enters it, an external vacuum device can be used to The outer wall of the pipe is sucked through these vacuum holes to make the outer wall of the pipe and the inner wall of the sizing copper sleeve fit completely, so that the outer wall of the pipe is further shaped by the inner wall of the sizing copper sleeve to avoid the concave deformation of the formed pipe surface. Secondly, on this basis, the sizing copper sleeve itself is made of brass material, which has excellent thermal conductivity. When it comes into contact with the pipe, it can quickly conduct heat to the outside world. The suction effect of the vacuum device during vacuuming will also form a certain airflow, so as to perform secondary cooling on the pipe based on the cooling of the diverter water jacket. When the pipe outputs the sizing copper sleeve and passes through the shaping stack When the sheet is formed, it already has a certain hardness. Compared with the soft state at high temperature, it is more likely to have the precipitation of raw materials. The present application sets up a number of shaping laminates, and the inner holes of the several shaping laminates are used for the pipe to pass through. This structure can greatly reduce the contact area between the pipe and the sizing sleeve, thereby reducing the friction effect of the inner wall of the sizing sleeve on the outer wall of the pipe, so as to reduce the precipitation of raw materials during the passage of the pipe. In the process of the pipe passing through the inner holes of each shaping laminate, the inner hole wall of the shaping laminate can achieve the effect of further shaping the outer wall of the pipe, and even if there is precipitation of raw materials, the precipitated raw materials After the extrusion effect, it is only retained on the side of the plate of each shaping laminate facing the sizing copper sleeve, and the inner hole wall can still remain in the original state, which can avoid the raw material from sticking and solidifying on the inner hole wall of the shaping laminate to the greatest extent, reducing the situation of scratching the pipe during subsequent basic work, and due to the interval setting of each shaping laminate, a certain gap can be left between each two adjacent shaping laminates, so that when the pipe passes through each shaping laminate, the residual heat can be dissipated through the gap between each two adjacent shaping laminates, thereby achieving three-time cooling of the pipe and ensuring the cooling and shaping effect of the pipe.
[0007] In the aforementioned anti-sticking sizing sleeve for manufacturing PVC pipes, the sleeve further includes a plurality of retaining rods, one end of which is connected to the rear end outer wall of the sizing copper sleeve. The retaining rods are circumferentially spaced along the rear end outer wall of the sizing copper sleeve, and the outer side walls of the shaped laminations are clamped to the outer walls of the retaining rods. The provision of the retaining rods allows the shaped laminations to be connected to the retaining rods in a snap-fit manner, thereby enabling workers to adjust the number and position of the shaped laminations according to production requirements.
[0008] In the aforementioned anti-sticking sizing sleeve for manufacturing PVC pipes, each shaped lamination has a plurality of positioning grooves formed on its outer wall, and each retaining rod is correspondingly embedded and positioned within the positioning grooves. This ensures a stable connection between each shaped lamination and the retaining rod. Furthermore, the inner wall of the positioning groove and the outer wall of the retaining rod cooperate to correct the orientation of each shaped lamination, ensuring that the inner holes of the shaped laminations are aligned.
[0009] The aforementioned anti-sticking and sizing sleeve for manufacturing PVC pipes further includes a positioning ring to which the other end of each retaining rod is detachably connected. The positioning ring ensures that both ends of each retaining rod are positioned, ensuring stable installation of the retaining rods and preventing the shaped laminations from shifting or even falling off.
[0010] In the aforementioned anti-sticking sizing sleeve for manufacturing PVC pipes, each pair of adjacent shaping laminations constitutes a group, and the spacing between groups of shaping laminations increases progressively along the length of the sizing sleeve. Specifically, the spacing between adjacent shaping laminations increases by 10 mm from front to back. This arrangement allows the shaping laminations closer to the sizing sleeve to more fully shape the pipe in conjunction with the cooling water channels and sizing channels, while the shaping laminations further away from the sizing sleeve primarily fine-tune and maintain the pipe's external connections, ensuring pipe forming quality.
[0011] In the aforementioned anti-sticking sizing sleeve for manufacturing PVC pipes, the inner diameters of the shaping laminations decrease sequentially from front to back along the length of the sizing copper sleeve. This allows for multiple, step-by-step shaping of the pipe during shaping, ensuring pipe forming quality. Specifically, the inner diameters of two adjacent shaping laminations differ by 1-2 mm.
[0012] Compared with the existing technology, the anti-sticking sizing sleeve used for manufacturing PVC pipes has the following advantages:
[0013] The cooling water jacket, sizing copper sleeve and several shaping laminations are used in combination to realize the cooling and shaping of the extruded pipe. In particular, the several shaping laminations can minimize the contact with the outer wall of the pipe, effectively preventing the precipitation of raw materials while ensuring the shaping and cooling effects. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The invention is a structural diagram of an anti-sticking sizing sleeve used for manufacturing PVC pipes.
[0015] Figure 2 The present invention is a cross-sectional view of an anti-sticking sizing sleeve used for manufacturing PVC pipes cut along the length direction.
[0016] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.
[0017] Figure 4 yes Figure 2 A partial enlarged view of point B in the middle.
[0018] Figure 5 It is a structural diagram of any piece of shaped laminate.
[0019] In the figure, 1, diverter water jacket; 11, cooling water channel; 2, sizing copper sleeve; 21, vacuum hole; 3, shaping lamination; 31, positioning groove; 4, retaining rod; 5, positioning ring. DETAILED DESCRIPTION
[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0021] like Figure 1 and Figure 2 As shown, the anti-sticking sizing sleeve for manufacturing PVC pipes includes a tubular diverter water jacket 1, a sizing copper sleeve 2, and a plurality of disc-shaped plastic laminates 3 with holes opened in the center. The diverter water jacket 1 and the sizing copper sleeve 2 are arranged horizontally, and the diverter water jacket 1 is installed on the front end of the sizing copper sleeve 2 in a detachable connection manner, which can be a clip-on or threaded connection.
[0022] Combine Figure 3 and Figure 4A cooling water channel 11 is opened circumferentially in the diverter water jacket 1, and the cooling water channel 11 is spirally arranged along the length direction of the diverter water jacket 1, and a water inlet hole and a water outlet hole connected to the cooling water channel 11 are respectively opened on the outer wall of the diverter water jacket 1. A plurality of long strip-shaped and spaced vacuum suction holes 21 are opened circumferentially on the outer wall of the sizing copper sleeve 2. The vacuum suction holes 21 can be several groups, and several groups of vacuum suction holes 21 are spaced along the length direction of the sizing copper sleeve 2. In addition, there are two forms of opening the vacuum suction holes 21, one of which is perpendicular to the center line of the sizing copper sleeve 2, and the other is inclined relative to the center line of the sizing copper sleeve 2, and the inclination angle is 45 degrees.
[0023] like Figure 2 As shown, the anti-sticking sizing sleeve for manufacturing PVC pipes also includes three retaining rods 4 and a circular ring-shaped positioning ring 5. Three threaded holes arranged at intervals are opened at the rear end of the sizing copper sleeve 2 along the circumferential direction. The three retaining rods 4 are screwed to the three threaded holes one by one. Three clearance holes arranged at intervals are opened on the positioning ring 5 along the circumferential direction. The other ends of the three retaining rods 4 pass through the clearance holes and are screwed and locked by nuts. Furthermore, the ends of the three retaining rods 4 have a connecting portion protruding in a cylindrical shape and an outer diameter smaller than the outer diameter of the retaining rod 4, and an annular edge is formed between the connecting portion and the retaining rod 4. After the connecting portion passes through the clearance hole, it abuts against one side of the positioning ring 5 through the annular edge, and the positioning ring 5 is clamped and positioned after the nut and the connecting portion are locked.
[0024] Combine Figure 5 Three spaced positioning grooves 31 are provided on the outer wall of each shaped lamination 3 along the circumferential direction. Several shaped laminations 3 are located between the three retaining rods 4 and are spaced apart along the length direction of the sizing copper sleeve 2. Specifically, the three retaining rods 4 are embedded in one-to-one correspondence and pressed against the groove wall of the positioning groove 31, so that each shaped lamination 3 is clamped between the three retaining rods 4. It is worth mentioning that among the several shaped laminations 3, every two adjacent shaped laminations 3 form a group, and the spacing between two adjacent groups of shaped laminations 3 increases by 10 mm, and the inner hole diameter of every two adjacent shaped laminations 3 decreases by 1-2 wires.
[0025] Working principle: The extruded pipe first enters the diversion water jacket 1, and the cooling water introduced from the cooling water channel 11 performs preliminary cooling on the pipe. Then, under the extrusion pressure of the subsequent pipe, this part of the pipe enters the sizing copper sleeve 2. At this time, the external vacuum device can suck outward through the vacuum suction hole 21 on the sizing copper sleeve 2, so that the outer wall of the pipe fits the inner wall of the sizing copper sleeve 2, and achieves secondary cooling of the pipe while achieving the sizing. Afterwards, under the extrusion pressure of the subsequent pipe, this part of the pipe passes through the central inner holes of several shaping laminations 3 in turn. While further shaping the outer wall of the pipe through the central inner holes of each shaping lamination 3, the preheat of the pipe can be dissipated outward through the gaps between each group of shaping laminations 3, so as to achieve the purpose of tertiary heat dissipation. Moreover, in the process of the pipe passing through each shaping lamination 3 in turn, the contact area between the outer wall of the pipe and the shaping lamination 3 can be minimized to the greatest extent, thereby reducing friction while achieving the shaping purpose and preventing the precipitation of raw materials.
[0026] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.
[0027] Although this document frequently uses terms such as diverter water jacket 1, cooling water channel 11, sizing copper sleeve 2, vacuum hole 21, shaping lamination 3, positioning groove 31, retaining rod 4, and positioning ring 5, the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.
Claims
1. An anti-sticking sizing sleeve for manufacturing PVC pipes, comprising a tubular water diversion jacket (1) with a cooling water channel (11) opened inside and a tubular sizing copper sleeve (2), characterized in that: The anti-sticking sizing sleeve for manufacturing PVC pipes also includes a plurality of annular shaping laminations (3), the diverter water sleeve (1) is connected to one end of the sizing copper sleeve (2), and the plurality of shaping laminations (3) are positioned at the other end of the sizing copper sleeve (2), the diverter water sleeve (1), the sizing copper sleeve (2) and the plurality of shaping laminations (3) are coaxially arranged, and the plurality of shaping laminations (3) are spaced apart along the length direction of the sizing copper sleeve (2).
2. The anti-sticking sizing sleeve for manufacturing PVC pipes according to claim 1, characterized in that: The anti-sticking sizing sleeve for manufacturing PVC pipes also includes a plurality of retaining rods (4) one end of which is connected to the rear end outer wall of the sizing copper sleeve (2); the plurality of retaining rods (4) are arranged at intervals along the circumferential direction of the rear end outer wall of the sizing copper sleeve (2); and the outer side walls of the respective shaping laminations (3) are clamped to the outer walls of the respective retaining rods (4).
3. The anti-sticking sizing sleeve for manufacturing PVC pipes according to claim 2, characterized in that: A plurality of positioning grooves (31) are provided on the outer wall of each of the shaped laminations (3), and each of the retaining rods (4) is embedded and positioned in the positioning groove (31) in a one-to-one correspondence.
4. The anti-sticking sizing sleeve for manufacturing PVC pipes according to claim 2 or 3, characterized in that: The anti-sticking sizing sleeve for manufacturing PVC pipes further comprises a positioning ring (5), and the other end of each retaining rod (4) is detachably connected to the positioning ring (5).
5. The anti-sticking sizing sleeve for manufacturing PVC pipes according to claim 1, 2 or 3, characterized in that: Every two adjacent shaping laminations (3) form a group, and the spacing between the shaping laminations (3) of the groups increases from front to back along the length of the sizing copper sleeve (2).
6. The anti-sticking sizing sleeve for manufacturing PVC pipes according to claim 1, 2 or 3, characterized in that: The inner hole diameters of the plurality of shaped laminations (3) decrease in sequence from front to back along the length of the sizing copper sleeve (2).