CN112793139A - A processing device and method for a thin-walled and small-diameter medical reducing tube - Google Patents
A processing device and method for a thin-walled and small-diameter medical reducing tube Download PDFInfo
- Publication number
- CN112793139A CN112793139A CN202011483946.XA CN202011483946A CN112793139A CN 112793139 A CN112793139 A CN 112793139A CN 202011483946 A CN202011483946 A CN 202011483946A CN 112793139 A CN112793139 A CN 112793139A
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- thin
- die cavity
- lining rod
- tube blank
- small
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 39
- 230000007704 transition Effects 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229920001169 thermoplastic Polymers 0.000 abstract description 2
- 239000004416 thermosoftening plastic Substances 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/22—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/005—Hoses, i.e. flexible
- B29L2023/007—Medical tubes other than catheters
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
本发明公开了一种薄壁小直径医用变径管的加工装置及方法，该装置包括：上下对称分布的上模腔、下模腔，所述上模腔与所述下模腔之间设置有内衬杆，所述内衬杆的外表面套设有管坯，所述管坯设置于所述上模腔、所述下模腔与所述内衬杆之间。本发明提出一种薄壁微小直径变径管的加工装置及方法，利用内部腔道形状与变径管外径匹配的模具，在加热后，将管材型坯放入模具中进行热塑拉伸成型；本发明改良了薄壁小直径变径管的成型工序，解决了焊接加工的变径管密封性不好、整体强度不足的缺点，也使类变径管的加工成本降低、生产效率提高，且变径管表面光滑，连续过渡。
The invention discloses a processing device and method for a thin-walled and small-diameter medical reducing tube. The device comprises an upper mold cavity and a lower mold cavity that are symmetrically distributed from top to bottom, and a cavity is arranged between the upper mold cavity and the lower mold cavity. There is an inner lining rod, the outer surface of the inner lining rod is sleeved with a tube blank, and the tube blank is arranged between the upper mold cavity, the lower mold cavity and the inner lining rod. The invention provides a processing device and method for a thin-walled and small-diameter reducing tube, which utilizes a mold whose internal cavity shape matches the outer diameter of the reducing tube, and after heating, puts the tube parison into the mold for thermoplastic stretching. Forming; the invention improves the forming process of the thin-walled and small-diameter reducing pipe, solves the shortcomings of poor sealing performance and insufficient overall strength of the welded reducing pipe, and also reduces the processing cost and improves the production efficiency of the similar reducing pipe. , and the surface of the reducer is smooth and continuous transition.
Description
Technical Field
The invention relates to a device and a method for processing a thin-wall small-diameter medical reducer pipe, belonging to the technical field of processing of high polymer materials.
Background
At present, in the field of interventional medical instruments, reducer pipes are widely used, however, most of reducer pipes are spliced together by means of welding, so that the machined reducer pipes have no perfect sealing performance and connection strength, and the welding process has the advantages of high cost, long time consumption, low productivity and discontinuous surface transition.
Disclosure of Invention
The invention aims to overcome the technical defects in the prior art, provides a device and a method for processing a thin-wall small-diameter medical reducer, and solves the problem that the key point to be overcome in the processing of the thin-wall small-diameter medical reducer can be produced and manufactured at low cost and high efficiency on the premise of ensuring that the thin-wall small-diameter reducer used in a brain intervention operation can meet the design requirement. The similar products of many enterprises are processed by adopting a welding process, and the processed reducer pipe has the defects of poor sealing performance, poor connection strength, higher process cost, long time consumption, low productivity and the like.
The invention specifically adopts the following technical scheme: a thin-wall small-diameter medical reducer pipe processing device comprises: the tube blank forming die comprises an upper die cavity and a lower die cavity which are symmetrically distributed up and down, wherein a lining rod is arranged between the upper die cavity and the lower die cavity, a tube blank is sleeved on the outer surface of the lining rod, and the tube blank is arranged among the upper die cavity, the lower die cavity and the lining rod.
In a preferred embodiment, the lining rod is matched and nested with the tube blank.
As a preferred embodiment, the lining rod comprises a thin end, a transition section and a thick end which are connected in sequence, wherein the thin end is connected with the thick end through the transition section.
In a preferred embodiment, the upper and lower cavities are disposed at the narrow end of the inner liner rod.
In a preferred embodiment, the butt end of the lining rod is inserted into the tube blank as a clamped end.
The invention also provides a processing method of the thin-wall small-diameter medical reducer pipe, which comprises the following steps:
step SS 1: when the reducer pipe is processed, the pipe blank is sleeved on the lining rod;
step SS 2: integrally assembling the upper die cavity and the lower die cavity which are not closed, heating the upper die cavity and the lower die cavity to a specified temperature, closing the upper die cavity and the lower die cavity, and simultaneously stretching the tube blank at a certain speed to enable the tube blank to be attached to the lining rod;
step SS 3: and (3) thermoplastically shaping the thin end and the transition section of the tube blank by the upper die cavity and the lower die cavity, cooling, opening the upper die cavity and the lower die cavity, drawing the tube blank out of the lining rod, and cutting into a specified length to obtain the reducer pipe.
In a preferred embodiment, the lining rod is matched and nested with the tube blank.
As a preferred embodiment, the lining rod comprises a thin end, a transition section and a thick end which are connected in sequence, wherein the thin end is connected with the thick end through the transition section.
In a preferred embodiment, the upper and lower cavities are disposed at the narrow end of the inner liner rod.
In a preferred embodiment, the butt end of the lining rod is inserted into the tube blank as a clamped end.
The invention achieves the following beneficial effects: the invention provides a method for processing a thin-wall small-diameter reducing pipe, which comprises the steps of heating a pipe parison by using a die with an internal cavity shape matched with the external diameter of the reducing pipe, and then putting the pipe parison into the die for thermoplastic stretch forming; the invention improves the forming process of the thin-wall small-diameter reducer, overcomes the defects of poor sealing property and insufficient overall strength of the welded reducer, reduces the processing cost of the reducer, improves the production efficiency, and ensures that the surface of the reducer is smooth and is in continuous transition.
Drawings
FIG. 1 is a schematic view of the overall construction of the reducer pipe of the present invention;
FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic view of the construction of the lining rod of the present invention;
FIG. 4 is a schematic structural view of the upper and lower mold cavities of the present invention;
FIG. 5 is a side view of the upper and lower mold cavities after they have been closed;
FIG. 6 is a schematic view of the tube blank being fitted to the die;
fig. 7 is a schematic view of a tube blank after being processed into a reducer pipe.
The meanings of the symbols in the figures: 1-a lining rod; 2-upper die cavity; 3-tube blank; 2' -lower die cavity; 3' -reducer pipe.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1: as shown in fig. 1, 2, 3 and 4, the present invention provides a processing apparatus for a thin-walled small-diameter medical reducer, comprising: the upper die cavity 2 and the lower die cavity 2' are symmetrically distributed up and down, an inner lining rod 1 is arranged between the upper die cavity 2 and the lower die cavity 2', a tube blank 3 is sleeved on the outer surface of the inner lining rod 1, and the tube blank 3 is arranged between the upper die cavity 2, the lower die cavity 2' and the inner lining rod 1.
Optionally, the lining rod 1 is in fit nested connection with the tube blank 3.
Optionally, the lining rod 1 includes a thin end, a transition section and a thick end which are connected in sequence, and the thin end is connected with the thick end through the transition section.
Optionally, the upper cavity 2 and the lower cavity 2' are arranged at the thin end of the lining rod 1.
Alternatively, the butt end of the lining rod 1 is inserted as a clamped end into the tube blank 3.
Example 2: as shown in fig. 5, 6 and 7, the invention also provides a method for processing the thin-wall small-diameter medical reducer pipe, which comprises the following steps:
step SS 1: when the reducer pipe 3' is processed, the pipe blank 3 is sleeved on the lining rod 1;
step SS 2: integrally assembling the tube blank into an upper die cavity 2 and a lower die cavity 2' which are not closed, heating the upper die cavity 2 and the lower die cavity 2' to a specified temperature, closing the upper die cavity 2 and the lower die cavity 2', and simultaneously stretching the tube blank 3 at a certain speed to enable the tube blank 3 to be attached to the lining rod 1;
step SS 3: and (3) performing hot-molding on the thin end and the transition section of the tube blank 3 by the upper mold cavity 2 and the lower mold cavity 2', opening the upper mold cavity 2 and the lower mold cavity 2' after cooling, drawing the tube blank 3 out of the lining rod 1, and cutting the tube blank into a specified length to obtain the reducer pipe 3 '.
Optionally, the lining rod 1 is in fit nested connection with the tube blank 3.
Optionally, the lining rod 1 includes a thin end, a transition section and a thick end which are connected in sequence, and the thin end is connected with the thick end through the transition section.
Optionally, the upper cavity 2 and the lower cavity 2' are arranged at the thin end of the lining rod 1.
Alternatively, the butt end of the lining rod 1 is inserted as a clamped end into the tube blank 3.
The invention improves the forming process of the thin-wall small-diameter reducer, overcomes the defects of poor sealing property and insufficient overall strength of the welded reducer, reduces the processing cost of the reducer, improves the production efficiency, and ensures that the surface of the reducer is smooth and is in continuous transition.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a processingequipment of medical reducing pipe of thin wall minor diameter which characterized in that includes: the upper die cavity (2) and the lower die cavity (2') are symmetrically distributed from top to bottom, an inner lining rod (1) is arranged between the upper die cavity (2) and the lower die cavity (2'), a tube blank (3) is sleeved on the outer surface of the inner lining rod (1), and the tube blank (3) is arranged between the upper die cavity (2) and the lower die cavity (2') and the inner lining rod (1).
2. The processing device of the thin-wall small-diameter medical reducer pipe according to claim 1, wherein the lining rod (1) is in fit and nested connection with the pipe blank (3).
3. The processing device of the thin-wall small-diameter medical reducer pipe according to claim 1, wherein the lining rod (1) comprises a thin end, a transition section and a thick end which are connected in sequence, and the thin end is connected with the thick end through the transition section.
4. The processing device of the thin-wall small-diameter medical reducer pipe according to claim 3, wherein the upper die cavity (2) and the lower die cavity (2') are arranged at the thin end of the lining rod (1).
5. The processing device of the thin-walled small-diameter medical reducer pipe according to claim 3, characterized in that the butt of the lining rod (1) is inserted into the tube blank (3) as a clamped end.
6. A method for processing a thin-wall small-diameter medical reducer pipe is characterized by comprising the following steps:
step SS 1: when the reducer pipe (3') is processed, the pipe blank (3) is sleeved on the lining rod (1);
step SS 2: integrally assembling the tube blank into an upper die cavity (2) and a lower die cavity (2') which are not closed, heating the upper die cavity (2) and the lower die cavity (2') to a specified temperature, closing the upper die cavity (2) and the lower die cavity (2'), and simultaneously stretching the tube blank (3) at a certain speed to enable the tube blank (3) to be attached to an inner lining rod (1);
step SS 3: and (3) performing hot-molding on the thin end and the transition section of the tube blank (3) in the upper mold cavity (2) and the lower mold cavity (2'), cooling, opening the upper mold cavity (2) and the lower mold cavity (2'), drawing the tube blank (3) out of the lining rod (1), and cutting into a specified length to obtain the reducing pipe (3 ').
7. The method for processing the thin-wall small-diameter medical reducer pipe according to claim 6, wherein the lining rod (1) is matched and nested with the pipe blank (3).
8. The method for processing the thin-wall small-diameter medical reducer pipe according to claim 6, wherein the lining rod (1) comprises a thin end, a transition section and a thick end which are connected in sequence, and the thin end is connected with the thick end through the transition section.
9. The method for processing the thin-wall small-diameter medical reducer pipe according to claim 8, wherein the upper die cavity (2) and the lower die cavity (2') are arranged at the thin end of the lining rod (1).
10. The method for processing a thin-walled small-diameter medical reducer pipe according to claim 8, characterized in that the butt of the lining rod (1) is inserted as a clamped end into the tube blank (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011483946.XA CN112793139A (en) | 2020-12-16 | 2020-12-16 | A processing device and method for a thin-walled and small-diameter medical reducing tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011483946.XA CN112793139A (en) | 2020-12-16 | 2020-12-16 | A processing device and method for a thin-walled and small-diameter medical reducing tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112793139A true CN112793139A (en) | 2021-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011483946.XA Pending CN112793139A (en) | 2020-12-16 | 2020-12-16 | A processing device and method for a thin-walled and small-diameter medical reducing tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112793139A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113618997A (en) * | 2021-08-17 | 2021-11-09 | 青岛普瑞希森医疗科技有限公司 | Special pipe and production process thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093623A (en) * | 1993-04-13 | 1994-10-19 | 西北有色金属研究院 | Tube mill for synchronously rolling to produce seamless reductor |
| CN1528542A (en) * | 2003-10-20 | 2004-09-15 | 广州冠华金属精工制造有限公司 | Method and apparatus for manufacturing reducing pipe |
| CN207942608U (en) * | 2018-02-12 | 2018-10-09 | 青岛森昊减震科技有限公司 | A kind of leather bag sulfurizing mould of air spring |
-
2020
- 2020-12-16 CN CN202011483946.XA patent/CN112793139A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093623A (en) * | 1993-04-13 | 1994-10-19 | 西北有色金属研究院 | Tube mill for synchronously rolling to produce seamless reductor |
| CN1528542A (en) * | 2003-10-20 | 2004-09-15 | 广州冠华金属精工制造有限公司 | Method and apparatus for manufacturing reducing pipe |
| CN207942608U (en) * | 2018-02-12 | 2018-10-09 | 青岛森昊减震科技有限公司 | A kind of leather bag sulfurizing mould of air spring |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113618997A (en) * | 2021-08-17 | 2021-11-09 | 青岛普瑞希森医疗科技有限公司 | Special pipe and production process thereof |
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Application publication date: 20210514 |
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| RJ01 | Rejection of invention patent application after publication |