CN102564402B - Universal real-time observation device with adjustable scale for high-molecular casting formation process - Google Patents
Universal real-time observation device with adjustable scale for high-molecular casting formation process Download PDFInfo
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Abstract
The invention provides a universal real-time observation device with an adjustable scale for a high-molecular casting formation process, and belongs to the technical field of high-molecular formation. The device comprises a base, a sprue plate, a front cavity plate, a rear cavity plate, a sliding stop block, a stop block mandril, a glass plate, a glass pressing block, a polytetrafluoroethylene (PTFE) cushion block and a cylindrical pin, wherein the glass plate is mounted on the inner concave supporting surface of a cavity plate comprising the sprue plate, the front cavity plate, the rear cavity plate and the sliding stop block, and is fixed through the pressing block; and the PTFE cushion block is placed between the glass pressing block and the glass plate so as to prevent glass from breaking. The length of a mold cavity can be adjusted according to the position of the sliding stop block; and the stop block mandril with a corresponding specification is adopted for positioning. The device can be used for casting formation of polymer materials, carrying out universal real-time observation on the forming process of the molding products with different lengths, discovering various unknown formation phenomena, and studying the impact of processing parameters, product lengths and the melt flow process on the shrinkage ratios of products, so as to further improve the researching level of casting formation technology of the polymer materials.
Description
Technical field
The invention belongs to high molecular forming technical field, relate to the adjustable Macromolecular pouring forming process universal real-time observation of a kind of yardstick.So-called universe real-time monitored refers to and can Zi entering cast gate, to the design of dynamic filling process that is full of die cavity, directly observe material melt, and observation scope has contained each position relevant with shaping that comprises cast gate and die cavity.
Background technology
The castable of macromolecular material is from the casting forming change of technique of metal and a kind of manufacturing process coming, and is widely used at present the shaping of the multiple materials such as phenolics, polyurethane, polyvinyl alcohol (PVA), silicones and thermoplastic elastomer.Compare with die forming with injection molded, castable is generally without pressurization, lower to the requirement of strength of mould.Resulting product macromolecular orientation is low, and internal stress is little, and quality is even, and also less to the restriction of molded article size.Nowadays castable technology is widely applied in a plurality of fields of national economy, but forming period is long and goods forming accuracy is poor etc., shortcoming still seriously restricts the development of castable technology.Due to the shortage of monitoring analysis means, for be shaped size especially of precision pouring, approach or surpass the research unusual shortcoming also of precision pouring forming technique of the large scale moulding article of a meter.
Macromolecular material shaping processing is a complicated science, and a large amount of scholars utilize method for numerical simulation to carry out the research of correlation theory for a long time, have obtained abundant academy's successes.But, due in numerical simulation for the simplification of physics, calorifics and other character of macromolecular material, make correlative study achievement and actual result have certain discrepancy.Visualization technique becomes the important means of research macromolecular material shaping process technology because it can reflect the design of dynamic filling process of material melt strictly according to the facts.Method for visualizing some unknown phenomenon in finding forming process, there is irreplaceable effect the aspects such as production process that disclose forming defects, are subject in recent years the great attention of academia.At present, visualization technique is widely used in many macromolecular material shapings field.According to the size of its visualization window scope, can be divided into two kinds of microscale, conventional yardsticks.The visual aspect of microscale, in injection molded, utilize high-speed camera micro-lens to observe melt flows forward position, adopt the impact of Stereo microscope research programming rate on foaming process in foaming and molding, this mode structure is comparatively complicated, apparatus expensive, cost is higher.The visual aspect of conventional yardstick, usings clear glass as visualization window, and injection moulding, rotational moulding dynamic compaction (DC) process are studied, and the method structure is relatively simple, but forming process pressure is larger, and glass must be selected thicker quartz glass or tempered glass; Inflation is shaped, and to take the glass mold of all-transparent be visual means, be easy to observation, but the glassware of high precision, complex profile shapes comparatively difficulty.
Along with the fast development of national economy, especially, at aspects such as military affairs, Aero-Space, communications and transportation, the application of large-sized precision moulding article and relevant analysis and research means have been proposed to more and more higher requirement.But current macromolecular material visual analyzing means only limit to analysis and the observation of the aspects such as the injection moulding, rotational moulding, foaming of microscale and conventional yardstick, about large scale macromolecular material castable and die cavity dimensional variation, the observation device that affects aspect of macromolecular material castable characteristic and method are not but seen to report.
Summary of the invention
The object of the present invention is to provide the adjustable Macromolecular pouring forming process universal real-time observation of a kind of yardstick, to fill up the deficiency of current large scale castable process observation analysis means, promote the development of castable technology.
Technical scheme of the present invention is as follows:
The Macromolecular pouring forming process universal real-time observation that a kind of yardstick is adjustable, comprise gate plate, front die cavity baffle plate, base, rear die cavity baffle plate, sliding block, block push rod, glass plate, glass briquetting, polytetrafluoro cushion block and straight pin, adopt groove type structure, gate plate, front die cavity baffle plate, rear die cavity baffle plate are fixed on base, form die cavity with glass plate, sliding block; Glass plate is as mould upper cover, forms visualization window, and visual scope has contained whole die cavity, formed universe observation window with the cast gate that can directly observe and other and moulding relative section.Glass plate is installed on the indent supporting surface of the cavity plate being formed by gate plate, front die cavity baffle plate, rear die cavity baffle plate and sliding block, and guarantees that thickness of glass is consistent with bench height, by glass briquetting, be fixed.Cracked for preventing that glass high-temperature heating from expanding, the one-sided back gauge that leaves 2mm between horizontal direction upper glass plates and cavity plate; In vertical direction, between glass briquetting and glass plate, place polytetrafluoro pad, with compensator or trimmer pressure.The die cavity length of this device is adjusted by the change in location of sliding block, and adopts the block push rod of dimension to position; First use straight pin to position block push rod, then be fixed with screw; This device die cavity length can be adjusted within the scope of 200-1000mm.
Effect of the present invention and benefit are: aspect castable, provide a kind of universal real-time observation of large scale, to study the castable process of macromolecular material under various yardsticks.Because forming process pressure is less, therefore this visualization window is selected simple glass plate, not only logical photosensitiveness is better, and draws materials extensively, and cost is lower.Adopt this device to carry out universe real-time monitored to the castable process of different length moulding article, find the shaping phenomenon of various the unknowns, analyze its mechanism of production; Inquire into the impact on shrink of product rate such as technological parameter, goods length, melt flows process.In sum, the present invention will further improve the research level of macromolecular material castable technology, promotes Macromolecular pouring goods at the application and development in the fields such as military affairs, Aero-Space, communications and transportation.
Accompanying drawing explanation
Fig. 1 is the structural representation of castable process universal real-time observation.
Fig. 2 is castable process universal real-time observation die cavity length adjustment schematic diagram.
In figure: 1 gate plate; 2 glass plates; 3 sliding blocks; 4 block push rods; 5 rear die cavity baffle plates; 6 bases; 7 front die cavity baffle plates; 8 glass briquettings; 9 polytetrafluoro cushion blocks; 10 straight pins.
Embodiment
Below in conjunction with technical scheme and accompanying drawing, describe most preferred embodiment of the present invention in detail.
This example is for the visual analyzing of the dynamic stowing operation of polyurethane elastomer JP85 flat part, and cavity structure as shown in Figure 2.Product is that rectangular parallelepiped is dull and stereotyped, is of a size of L * 100 * 10mm(L and gets 200--1000).In figure, in dotted line frame, be divided into die cavity region.
Embodiment step is as follows:
Step 1: shown in Fig. 2, need to select the block push rod of dimension by experiment.
Step 2: cleaning plant related components, to die cavity partly relevant each face smear appropriate release agent.
Step 3: shown in Fig. 1, assembly type cavity segment parts.Gate plate, front die cavity baffle plate, rear die cavity baffle plate are fixed on base, use socket head cap screw to carry out just location; Sliding block is installed, is used block push rod to position it; To block push rod, first adopt straight pin to carry out length direction location, re-use socket head cap screw and fix.Tighten the screw between gate plate and front die cavity baffle plate and rear die cavity baffle plate, and then reinforce other screws.
Step 4: visualization window is assembled by shown in Fig. 1.Glass plate is installed to the brace table position of cavity plate, uses socket head cap screw to position by glass briquetting, polytetrafluoro cushion block, adjust glass plate position, guarantee that itself and each limit of cavity plate leave 2mm distance between left and right, tighten screw.
Step 5: mould is carried out to preheating, specify mould temperature to reach.
Step 6: according to experiment needs, get respectively by a certain percentage appropriate base polyurethane prepolymer for use as and chain extender, be heated to assigned temperature, mix, stirring, vacuum defoamation, be at the uniform velocity poured in die cavity.
Step 7: adopt video camera to carry out record to casting process.
Step 8: use video and image processing software to process experiment video and image, analysis result.
Claims (2)
1. the Macromolecular pouring forming process universal real-time observation that yardstick is adjustable, comprise gate plate (1), front die cavity baffle plate (5), base (6), rear die cavity baffle plate (7), sliding block (3), block push rod (4), glass plate (2), glass briquetting (8), polytetrafluoro cushion block (9) and straight pin (10), it is characterized in that: adopt groove type structure, gate plate (1), front die cavity baffle plate (5), rear die cavity baffle plate (7) are fixed on to base (6) upper, form die cavity with glass plate (2), sliding block (3); Glass plate (2) is as mould upper cover, forms visualization window, and visual scope has covered whole die cavity, formed universe observation window with the cast gate that can directly observe and other and moulding relative section; Glass plate (2) is installed on the indent supporting surface of the cavity plate being formed by gate plate (1), front die cavity baffle plate (5), rear die cavity baffle plate (7) and sliding block (3), and guarantee that thickness of glass is consistent with bench height, by glass briquetting (8), be fixed; The one-sided back gauge that leaves 2mm between horizontal direction upper glass plates and cavity plate; In vertical direction, between glass briquetting (8) and glass plate (2), place polytetrafluoro cushion block (9); Sliding block (3) is fixing by block push rod (4), and straight pin (10) positions block push rod (4), then is fixed with screw.
2. the adjustable Macromolecular pouring forming process universal real-time observation of a kind of yardstick as claimed in claim 1, is further characterized in that: utilize the change in location adjusting type cavity length of sliding block (3), and adopt block push rod (4) to position; This device die cavity length is adjusted within the scope of 200-1000mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110456827.XA CN102564402B (en) | 2011-12-31 | 2011-12-31 | Universal real-time observation device with adjustable scale for high-molecular casting formation process |
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| CN201110456827.XA CN102564402B (en) | 2011-12-31 | 2011-12-31 | Universal real-time observation device with adjustable scale for high-molecular casting formation process |
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| CN102564402A CN102564402A (en) | 2012-07-11 |
| CN102564402B true CN102564402B (en) | 2014-04-02 |
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| CN102928339A (en) * | 2012-10-16 | 2013-02-13 | 大连理工大学 | Method for visually testing internal molding shrinkage characteristic of high polymer material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4290248A (en) * | 1975-01-06 | 1981-09-22 | William James Kemerer | Continuous process for forming products from thermoplastic polymeric material having three-dimensional patterns and surface textures |
| US5924476A (en) * | 1997-09-17 | 1999-07-20 | Ishikawajima-Harima Heavey Industries Co. Ltd. | Casting steel strip |
| CN1762619A (en) * | 2004-10-22 | 2006-04-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Integral pouring method for processing whole set of thin-walled parts and dedicated clamp |
| CN102009445A (en) * | 2010-09-21 | 2011-04-13 | 上海大学 | Full-automatic vacuum molding control system and method |
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- 2011-12-31 CN CN201110456827.XA patent/CN102564402B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4290248A (en) * | 1975-01-06 | 1981-09-22 | William James Kemerer | Continuous process for forming products from thermoplastic polymeric material having three-dimensional patterns and surface textures |
| US5924476A (en) * | 1997-09-17 | 1999-07-20 | Ishikawajima-Harima Heavey Industries Co. Ltd. | Casting steel strip |
| CN1762619A (en) * | 2004-10-22 | 2006-04-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Integral pouring method for processing whole set of thin-walled parts and dedicated clamp |
| CN102009445A (en) * | 2010-09-21 | 2011-04-13 | 上海大学 | Full-automatic vacuum molding control system and method |
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