阅读说明：本技术 一种制备形状记忆产品的加工方法 (A kind of processing method preparing shape memory product ) 是由 周晶 周梓婷 孟月 王小莺 全大萍 白莹 于 2019-08-26 设计创作，主要内容包括：本发明制备形状记忆产品的加工方法的方案包括：步骤一,按照常规加工方法,使用热致型形状记忆高分子材料制得具有初始形状的初产品；步骤二,根据回复后尺寸需求调整变形加工温度,在该温度下使初产品持续变形直至变形后的形状满足预设要求为止,冷却降温,得到临时形状产品；步骤三,加热安装后的临时形状产品,其从变形后的形状向初始形状回复后产生不同的形变,得到预设的不同尺寸的形状记忆产品。本发明提供一种仅需通过控制变形加工温度、无需多尺寸模具或建模设计的制备不同尺寸产品的简易加工方法,适用于具有结晶性的热致型形状记忆高分子,具有普适性,且制备得到的产品特别适用于安装与使用时空间范围或形状差别较大的特殊情况。(The scheme that the present invention prepares the processing method of shape memory product includes: step 1, and according to Conventional processing methods, the head product with original shape is made using thermotropic shape memory high molecule material；Step 2 adjusts deformation processing temperature according to size requirements after reply, makes head product continuous deformation until deformed shape meets preset requirement at such a temperature, cool, obtain temporary shapes product；Step 3, the temporary shapes product after heating installation, generates different deformation after replying from deformed shape to original shape, obtains preset various sizes of shape memory product.The present invention provides a kind of only need by control deformation processing temperature, without the Simple Machining for preparing different sized products of more sized molds or Modeling and Design, suitable for crystalline thermotropic shape memory high molecule, with universality, and the product being prepared is especially suitable for installation and spatial dimension or differences in shape biggish special circumstances when using.)

1. a kind of processing method for preparing shape memory product characterized by comprising

Step 1 is made first with original shape using thermotropic shape memory high molecule material according to Conventional processing methods Product；

Step 2, according to after reply size requirements adjust deformation processing temperature, make at such a temperature head product continuous deformation until It until deformed shape meets preset requirement, cools, obtains temporary shapes product；

Step 3, the temporary shapes product after heating installation, generates different after replying from deformed shape to original shape Deformation, obtain preset various sizes of shape memory product.

2. the processing method according to claim 1 for preparing shape memory product, which is characterized in that the deformation in step 2 Processing temperature is adjusted according to the DSC second melting curve and required reply size of thermotropic shape memory high molecule material Section.

3. the processing method according to claim 1 for preparing shape memory product, which is characterized in that work as shape memory product When installation space is less than use space, the size of the head product in step 1 is substantially similar with full-size.

4. the processing method according to claim 3 for preparing shape memory product, which is characterized in that the primiparity in step 2 Product continuous deformation is head product continued compression.

5. the processing method according to claim 1 for preparing shape memory product, which is characterized in that work as shape memory product When installation space is greater than use space, the size of the head product in step 1 is substantially similar with minimum dimension.

6. the processing method according to claim 5 for preparing shape memory product, which is characterized in that the primiparity in step 2 Product continuous deformation is head product prolonged expansion.

Technical field

The present invention relates to product processing technique fields.More specifically to a kind of processing for preparing shape memory product Method.

Background technique

Shape memory high molecule is due to, easy processing molding excellent with light inexpensive, electrical insulating property and rotproofness and shape The excellent equal many advantages of memory performance, are widely used to the neck such as telecommunications, bio-medical, machine-building and aerospace Domain.After shape memory high molecule machine-shaping, under given conditions can deformation occurs, again molding obtain secondary shape, pass through The excitation of extraneous such as heat, light, electricity, magnetic, and can freely reply, " memory " its original shape.Wherein, thermotropic shape memory is high Molecule is controlled using temperature, and method simple practical, which has a wide range of application, is researched and developed in current shape memory high molecule material Field the most active.

Thermotropic shape memory high molecule applies shape A carry at the transition temperature after machine-shaping is original shape A Lotus is morphed into temporary shapes B, then cools down in a deformed state, cooling and shaping, so that preparing completion one has deformation function Product；When being again heated to transition temperature or more in use process, shape memory product is general can be automatically reverted to again Shape C identical with original original shape A.And by the response rate of control product, it is available a series of similar to shape A But various sizes of shape C, to realize different deformation applications.The method of existing control response rate, needs to return in difference Reach under rewarming degree and reply size adjusting (CN104109329A), or steps up temperature or apply stimulation.Lack identical At a temperature of disposably obtain it is different reply sizes stable shaped methods.

The characteristics of shape memory high molecule can be changed due to its shape by environmental stimuli, packaging material, aerospace, The fields such as pin for suppressing metal, medical devices and Medical rack have considerable application prospect.Compared to common high molecular materials, shape note Macromolecule product is recalled especially suitable for installing the situation larger with spatial dimension when using or differences in shape: such as minimally invasive implantation branch Frame is replied after bracket reaches internal corresponding position again using the temporary shapes of small volume when in stenter to implant organism For the biggish permanent shape of volume, slight illness, quickening post-operative recovery conducive to mitigation patient；Such as pin for suppressing metal, make when assembling pin With the temporary shapes of small volume, replying it when assembling pin into the cavity being intended between riveted plate is that volume is biggish permanent Shape, by plate riveted, conducive to the close connection of device；Such as the connection of pipe reducer in aircraft industry, use what is be radially expanded Temporary shapes cover in pipe reducer, and reheating makes it be retracted to permanent shape, can be used for the anti-corrosion of steel pipe junction Protection.

Now, in the fields such as telecommunications, bio-medical, machine-building and aerospace, pay attention to day by day application shape note Recall macromolecule substituted metal device, these devices are all by mold or modeling molding.The original shape of shape memory high molecule Can be realized using conventional Polymer Processing method, such as injection moulding, blow molding, extrusion molding, compression moulding, The technological means such as laser sintered, laser formation and 3D printing.In order to meet the needs of practical application, often need with complex shape Shape and the different shapes (shape C) using size are able to carry out the memory macromolecule product of different deformation, existing processing and forming Method can prepare with complex shape, fine structure product, however, being directed to the different sizes of same complicated shape The production of product, existing Polymer Processing technique still need to be improved.

Currently, for by mold assign shape of product processing and forming means for, such as injection moulding, blow molding, The processing methods such as extrusion molding and compression moulding, production the same shape, various sizes of product and production different shape product Process complexity and cost consumption it is almost suitable, although the shape invariance of product, still need to first make various sizes of mold, In actual production, it needs to calculate separately inlet amount according to size, prevent from lacking material flash, need artificial more mold exchange, also with preparation Various sizes of product.Not only there are various sizes of mold consumption bring cost and environmental problem, but also has artificial replacement mould The problems such as labour caused by having aggravates, the processing technology time is spun out.For assigning the processing and forming of shape of product by modeling For means, such as laser sintered, laser formation and 3D printing processing method, producing various sizes of complicated shape product needs To establish various sizes of complicated shape model respectively, in machine-shaping, also need for different sizes calculate separately material quantity, Prevent insufficient raw material or waste.Therefore, the complicated shape product of different sizes, above-mentioned traditional processing side are if desired obtained Method requires to carry out mold design (such as injection molding, compression moulding) to required sizes, or carries out various sizes of Modeling and Design (such as 3D printing, laser formation) can not pass through the multiple sizes of mold or model realization of the same size design Product processing, it is excessively high not only result in molding process cost, and complex procedures.

Therefore, a kind of method for processing forming of simplified various sizes of complicated shape product of production is needed, to improve production Efficiency reduces production cost, avoids waste of material caused by the mold of multiple sizes, realizes the green of high molecular material production Change.

Summary of the invention

In order to solve the above technical problem, the present invention provides a kind of processing methods for preparing shape memory product.

A kind of technical solution for the processing method for preparing shape memory product of the present invention includes:

Step 1, according to Conventional processing methods, being made using thermotropic shape memory high molecule material has original shape Head product；

Step 2 adjusts deformation processing temperature according to size requirements after reply, makes head product continuous deformation at such a temperature It until deformed shape meets preset requirement, cools, obtains temporary shapes product；

Step 3, the temporary shapes product after heating installation, generates after replying from deformed shape to original shape Different deformation obtains preset various sizes of shape memory product.

Preferably, the deformation processing temperature in step 2 is molten according to DSC bis- times of thermotropic shape memory high molecule material Size requirements are adjusted after melting curve and replying.

Preferably, when shape memory product installation space is less than use space, the size of the head product in step 1 with Full-size is substantially similar.

Preferably, the head product continuous deformation in step 2 is head product continued compression.

Preferably, when shape memory product installation space is greater than use space, the size of the head product in step 1 with Minimum dimension is substantially similar.

Preferably, the head product continuous deformation in step 2 is head product prolonged expansion.

It is an object of the invention to overcome the prior art to need a large amount of molds or modeling when preparing different size wrought products The shortcomings that, providing a kind of only needs to prepare different rulers by control deformation processing temperature, without more sized molds or Modeling and Design The Simple Machining of very little product.This method is suitable for having crystalline thermotropic shape memory high molecule, has universality, And the product being prepared is being packed especially suitable for installation and spatial dimension or differences in shape biggish special circumstances when using The various fields such as material, aerospace, pin for suppressing metal, medical devices and Medical rack have considerable potential application foreground, and It is expected to generate good economic benefit and social benefit.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis The attached drawing of offer obtains other attached drawings

Fig. 1 is smaller, the biggish various sizes of star-like product of use space suitable for installation space in the present invention adds Work schematic diagram；

Fig. 2 is to be suitable for product in the present invention to need guiding through larger installation space and the lesser different inner diameters ruler of use space The machining sketch chart of very little cylinder hollow pipe；

Fig. 3 is the synthetic reaction used in the embodiment of the present invention 1 with crystalline thermotropic shape memory high molecule Formula；

Fig. 4 is the DSC test result of thermotropic shape memory high molecule used in the embodiment of the present invention 1；

Fig. 5 is to obtain the different length size of final products and the relational graph of processing temperature in 1-7 of the embodiment of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

A kind of key step for the processing method for preparing shape memory product of the present invention includes:

Step 1, according to Conventional processing methods, being made using thermotropic shape memory high molecule material has original shape Head product；

Step 2 adjusts deformation processing temperature according to size requirements after reply, makes head product continuous deformation at such a temperature It until deformed shape meets preset requirement, cools, obtains temporary shapes product；

Deformation processing temperature in step 2 needs basis to have crystalline thermotropic shape memory high molecule material DSC second melting curve and required reply size are adjusted.

Step 3, the temporary shapes product after heating installation, generates after replying from deformed shape to original shape Different deformation obtains preset various sizes of shape memory product.

The present invention produces that (shape is not limited to common cylindricality, side with original shape by conventional method for processing forming Shape can also be complicated shape) head product, regulate and control a series of deformation processing temperature, deform it, then cool down and make head product The temporary shapes are fixed as, after the installation is completed by temporary shapes product, to the heating of temporary shapes product, are again deformed it for most Required size eventually can regulate and control the final size of product by regulation heat distortion temperature, obtain having a series of rulers Very little product.

It should be noted that the deformed shape in step 2 need to be deformed according to product installation situation, for not TongAn The shape memory high molecule product of dress, service condition, adopts the following technical scheme that realization object above respectively:

1, shape memory product is applied to installation space and is less than use space (installation space is smaller, use space is larger) Situation

By taking Fig. 1 as an example, comprising:

Step 1 S1 obtains the product of required shape (star-like) by the processing method based on mold design or modeling.

In step sl, the shape according to needed for product carries out mold or modelling first, passes through conventional processing and forming side Legal system makes full-size or slightly larger than maximum sized head product, obtains the star-like head product of step 1 as shown in figure 1.

Step 2 S2 keeps compressing star-like product for a period of time, makes star-like product body at a temperature of different deformation processings Product is reduced, is easily installed.

In step 2 S2, different according to setting reply size, under a series of corresponding different heat distortion temperatures, to first Product is compressed and is kept for a period of time, its volume is made to be suitable for being implanted into lesser installation space.

Step 3 S3 keeps compressing star-like product, cools simultaneously, fix the temporary shapes, at this time can by its with Smaller size smaller installation.

In step 3 S3, compression head product is kept, while cooling, consolidating the temporary shapes product with small size Fixed a period of time, it can be implanted into lesser installation space later.

Step 4 S4, heats star-like product to thermal transition temperature or more, the shape for being sized its free-extension.

In step 4 S4, after temporary shapes product is installed to required position, transition temperature or more is heated to it, Make its free-extension, finally obtain a series of product of sizes, such as a series of star-like product of sizes in Fig. 1 step 4.

2, applied to installation space, greater than use space, (product needs guiding through larger installation space, use to shape memory product Space is smaller) the case where

By taking Fig. 2 as an example, comprising:

Step 1 S1 obtains required shape (cylinder hollow tubulose) by the processing method based on mold design or modeling Product.

In step sl, the shape according to needed for product carries out mold or modelling, passes through conventional method for processing forming system The head product for making minimum dimension or slightly smaller than minimum dimension obtains step 1 cylinder hollow pipe head product as shown in figure 1, and such as heat is received The draw.

Step 2 S2 keeps expansion hollow pipe for a period of time, keeps hollow pipe radially swollen at a temperature of different deformation processings It is swollen, be easily installed.

In step 2 S2, different according to setting reply size, under a series of corresponding different heat distortion temperatures, to To small size head product be radially expanded and keep a period of time, make its volume be suitable for across biggish installation space.

Step 3 S3, keep expansion hollow pipe, cool simultaneously, fix the temporary shapes, at this time can by its with compared with Large diameter installation.

In step 3 S3, radial dilatation head product is kept, while cooling, producing the temporary shapes with large diameter Product fixed a period of time, it can be passed through biggish installation space later.

Step 4 S4, heating hollow pipe to thermal transition temperature or more, so that it is freely bounced back is the shape being sized.

In step 4 S4, after temporary shapes product is installed to required position, transition temperature or more is heated to it, So that it is freely bounced back, finally obtain a series of product of sizes, such as a series of cylinder hollow pipe product of sizes in Fig. 1 step 4.

It is described in detail combined with specific embodiments below for present invention expansion.