CN114986944A - Needle-shaped composite nested pultrusion die and using method thereof - Google Patents
Needle-shaped composite nested pultrusion die and using method thereof Download PDFInfo
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- CN114986944A CN114986944A CN202210654918.2A CN202210654918A CN114986944A CN 114986944 A CN114986944 A CN 114986944A CN 202210654918 A CN202210654918 A CN 202210654918A CN 114986944 A CN114986944 A CN 114986944A
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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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/76—Cores
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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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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Abstract
The application provides a nested formula pultrusion mould of acicular combined material and application method, includes: a mold body having a receiving cavity therein; a mould channel is also arranged in the mould main body; the core die assembly is arranged in the die channel and is provided with a pultrusion channel, and the pultrusion channel is used for providing a forming space for the fiber tows soaked in the resin; heating element, heating element install in it is inside to hold the cavity, heating element is used for right the shaping space heating to make the resin curing of infiltration fibre silk bundle form needle-like composite finished product, this application is through at mould passageway internally mounted mandrel subassembly, and mandrel subassembly inside has the pultrusion passageway, and needle-like composite is at the inside heating curing of pultrusion passageway, and flash, rich resin phenomenon can not appear in needle-like composite finished product, and the shaping product can reach required theoretical size along length direction homoenergetic.
Description
Technical Field
The application relates to the technical field of needle-shaped composite materials, in particular to a needle-shaped composite material nested pultrusion mold and a using method thereof.
Background
The pultrusion process has the advantages of high efficiency, low cost, low loss of raw materials, high quality consistency and the like, and is widely applied to the large-scale continuous production of constant-section composite materials, the pultrusion mould in the prior art is usually designed into a split structure according to the section shape of a product, each split structure is machined by adopting a metal material, a cavity matched with the section shape of the composite material product is formed after combination, the split pultrusion mould is inevitably provided with gaps when mutually buckled, the gaps just cause the phenomenon of flashing or rich resin of the formed product, the pultruded product cannot be ensured to completely reach the theoretical size along the length direction, the gaps can accumulate resin, the roughness of the inner cavity of the mould can be increased after the resin is cured, and for needle-shaped composite materials with the diameter size of less than 6mm, the composite material is easy to break in the molding process, the composite material breaks in the pultrusion process, the mold is prone to be disassembled and cleaned, the mold is in a high-temperature state, cleaning operation can be carried out after cooling is needed, a large amount of production time is delayed, solvents such as acetone, alcohol or isopropanol are adopted in the cleaning process, and the cost for treating the solvents and subsequent dangerous chemicals is also a cost; by adopting a split type pultrusion die, corresponding dies must be prepared aiming at needle-shaped composite materials with different diameters, the dies correspond to products one to one and cannot be used universally, and the die input cost is additionally increased; split type pultrusion mould adopts the hot plate to heat usually, and mould heating efficiency and temperature homogeneity are difficult to guarantee, and the temperature also is difficult to control in addition, and the phenomenon that the temperature overshoots appears easily, brings the influence to pultrusion combined material shaping quality control, and this application provides a nested formula pultrusion mould and application method of acicular combined material.
Disclosure of Invention
The application aims to solve the problems and provides a needle-shaped composite nested pultrusion die and a using method.
In a first aspect, the application provides a nested pultrusion die for needle-shaped composite materials, which comprises a die main body, wherein a containing cavity with an open top is arranged in the die main body; the die main body is also provided with a die channel which penetrates through the accommodating cavity along the horizontal direction; the core die assembly is arranged in the die channel and is provided with a pultrusion channel, and the pultrusion channel provides a forming space for the fiber tows soaked with the resin; and the heating component is arranged in the accommodating cavity and used for heating the forming space so as to cure the resin infiltrated into the fiber tows and form a needle-shaped composite material finished product.
According to the technical scheme provided by the embodiment of the application, the core mold assembly comprises at least two nested core molds which are nested with each other, in two adjacent nested core molds, the difference value between the outer diameter of the inner nested core mold and the inner diameter of the outer nested core mold is 0.2mm-0.4mm, and the two adjacent nested core molds are detachably assembled.
According to the technical scheme provided by the embodiment of the application, one end of the pultrusion channel is in a round mouth shape, and the other end of the pultrusion channel is in a horn mouth shape.
According to the technical scheme provided by the embodiment of the application, one end of the core mold component extends out of the mold channel and protrudes outwards to form a limiting part; the limiting part is abutted against the outer wall of the die main body and is arranged at the same side as the inlet end of the pultrusion channel.
According to the technical scheme provided by the embodiment of the application, the heating assembly comprises heat conduction liquid filled in the accommodating cavity and a heating resistor used for heating the heat conduction liquid.
According to the technical scheme provided by the embodiment of the application, the heat insulation sleeve wraps the periphery of the die main body.
According to the technical scheme provided by the embodiment of the application, the die body is provided with at least two die channels.
According to the technical scheme provided by the embodiment of the application, the wall thickness of the innermost nested mandrel is greater than 0.2mm, and the wall thickness of the rest nested mandrels is greater than 0.8 mm.
According to the technical scheme provided by the embodiment of the application, the nested core mold adopts stainless steel capillary tubes with different specifications.
In a second aspect, the application provides a nested pultrusion die for the needle-shaped composite material and a using method thereof, and the nested pultrusion die comprises the following specific steps:
selecting a nested core mold matched with the diameter of the acicular composite material as an innermost nested core mold;
nesting a nesting core mold with matched size outside the innermost nesting core mold;
when the outer diameter of the nesting core mold at the outermost side is smaller than the inner diameter of the mold channel by 0.2mm-0.4mm, stopping nesting;
sleeving the combined core mold component into the mold channel from the inlet of the needle-shaped composite material;
drawing one end of a fiber tow from an inlet end to an outlet end of the pultrusion channel;
pouring heat-conducting liquid into the mould main body, heating the forming space to the temperature required by the process by using a heating resistor to heat the heat-conducting liquid, and heating and insulating by using a temperature control system;
infiltrating the fiber tows positioned outside the inlet end of the pultrusion channel with resin in a resin impregnation tank;
continuously pulling the fiber tows from the outlet end of the pultrusion channel by a tractor, and continuously solidifying the fiber tows soaked in the resin in a forming space to form a needle-shaped composite material finished product;
after the production is finished, the needle-shaped composite material is cut off at the outlet end, the fiber tows soaked in the resin are cut off at the inlet end, and the innermost nested core mold can be directly taken out without being cleaned;
if the product specification needs to be changed, the innermost nested core mold is withdrawn, and the nested core mold matched with the needle-shaped composite material in diameter size is replaced;
when the innermost nested core mold is taken out and installed, the whole mold does not need to be cooled and can be directly replaced, and the innermost nested core mold can quickly reach the process temperature required by molding;
in the production process, if fiber breakage occurs, the innermost nested core mold can be directly replaced.
Compared with the prior art, the beneficial effect of this application: the cavity is accommodated through the top opening in the die body, the die channel penetrates through the cavity along the horizontal direction, the heating assembly is arranged inside the accommodating cavity, the core die assembly is placed in the die channel, the pultrusion channel is arranged inside the core die assembly, the pultrusion channel is provided with a forming space for forming and curing fiber tows of infiltration resin, when the heating assembly is used, the heating assembly is started to heat the inside of the forming space until the temperature inside the forming space reaches the process, the fiber tows of infiltration resin are introduced into the forming space inside the pultrusion channel, the resin of infiltration fiber tows can be cured to form a needle-shaped composite finished product, and the cross section size of the finally-shaped needle-shaped composite finished product is consistent with the inner diameter size of the pultrusion channel; the integrated pultrusion channel is adopted, so that the phenomenon of flash or resin enrichment can not occur when the acicular composite material is pultruded, the size of the pultruded product in the length direction can be kept consistent, the theoretical size can be achieved, meanwhile, the resin accumulation is avoided, the roughness in the pultrusion channel can not be increased, and for the acicular composite material with the required diameter smaller than 6mm, the condition of breakage can not occur in the pulling process; the nesting core mold adopts a stainless steel capillary tube, so that the cost is low, and the nesting core mold can be directly replaced without being repeatedly cleaned after the forming process is finished; compared with the traditional pultrusion mould, the mould cleaning labor cost is reduced, and the cost for treating the solvent and subsequent dangerous chemicals is reduced; the nested core mold is convenient to disassemble, assemble and fix, the heat capacity is small, the disassembly in the production process does not need to be cooled, and after the assembly is completed, the innermost nested core mold can quickly reach the forming temperature, so that the production working hour loss is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an acicular composite nested pultrusion die provided in an embodiment of the present application.
The text labels in the figures are represented as:
1. a mold body; 2. a mold channel; 3. a heat insulating sleeve; 4. a heat-conducting liquid; 5. a heating resistor; 6. a core mold assembly.
Detailed Description
The following detailed description of the present application is given in conjunction with the accompanying drawings for the purpose of enabling those skilled in the art to better understand the technical solution of the present application, and the description in this section is only exemplary and explanatory, and should not be taken as limiting the scope of the present application in any way.
Example 1
Referring to fig. 1, the present embodiment provides a needle-shaped composite nested pultrusion mold, which includes:
the mould comprises a mould main body 1, wherein an accommodating cavity with an opening at the top is arranged in the mould main body 1; the die main body is also provided with a die channel which penetrates through the accommodating cavity along the horizontal direction;
the core die assembly 6 is installed in the die channel 2, the core die assembly 6 is provided with a pultrusion channel, and the pultrusion channel provides a molding space for the fiber tows soaked with the resin;
and the heating component is arranged in the accommodating cavity and used for heating the forming space so as to cure the resin infiltrated into the fiber tows and form a needle-shaped composite material finished product.
Specifically, in this embodiment, a containing cavity is arranged in the mold main body 1, the containing cavity includes a box structure with an open top, two circular holes are respectively arranged on opposite side surfaces of the box, the containing cavity further includes a hollow cylinder, the circular holes at two ends of the hollow cylinder are fixedly connected with the circular holes of the box to form the containing cavity together, a mold passage 2 penetrating through the containing cavity along a horizontal direction is further arranged in the mold main body 1, the mold passage 2 is of a hollow cylindrical structure, two ends of the mold passage 2 are flush with outer surfaces of two ends of the mold main body 1, and the mold main body 1 and the mold passage 2 form an integral structure; the core die assembly 6 is placed inside the die channel 2, a pultrusion channel is arranged in the core die assembly 6, the pultrusion channel provides a forming space for the fiber tows soaked with the resin, a heating assembly is arranged inside the accommodating cavity and used for heating the forming space, the fiber tows soaked with the resin in the forming space are heated, and the resin soaked with the fiber tows is cured to form a needle-shaped composite finished product.
In the using process, a core mold component with the inner diameter matched with the diameter of the needle-shaped composite material is selected, the core mold component is sleeved into a mold channel from the inlet direction of the needle-shaped composite material, a heating component is opened to heat the forming space until the process temperature is reached, the fiber tows soaked with the resin are led in from a pultrusion channel at the inlet end of the core mold component and led out from the outlet end of the pultrusion channel, and the fiber tows soaked with the resin in the forming space are cured and formed to form a needle-shaped composite material finished product.
The application provides a can realize that the product is direct to be pulled out from the inside pultrusion channel that mandrel component has, this pultrusion channel is a whole, there is not split type pultrusion mould in the gap that the compound die surface produced, the accumulational phenomenon of resin can not appear because of the existence in gap, can not lead to the product fracture, can not lead to acicular combined material to appear the overlap along length direction, the appearance of rich resin influences the product, can guarantee after the product shaping that the product all can reach theoretical size along length direction, use heating element to heat the shaping space, make the inside resin curing in shaping space, form acicular combined material's finished product.
Further, the core mold assembly 6 comprises at least two nested core molds which are nested with each other, the difference between the outer diameter of the inner nested core mold and the inner diameter of the outer nested core mold in two adjacent nested core molds is 0.2mm-0.4mm, and the two adjacent nested core molds can be detachably assembled.
Specifically, in this embodiment, the core mold assembly 6 may include two nested core molds, or may include a plurality of nested core molds, each nested core mold is nested with each other, and each nested core mold that is nested with each other is detachably assembled with each other, after the production is completed, the completed needle-shaped composite material is cut at the outlet end of the core mold assembly 6, the fiber tow soaked with the resin is cut at the inlet end of the core mold assembly 6, the core mold assembly 6 may be directly taken out, if a finished needle-shaped composite material product of another specification is needed, the core mold assembly 6 of the needed specification is reassembled as needed, the combined core mold assembly 6 is placed inside the mold channel 2 for continuous use, the production of needle-shaped composite materials of different sizes may be realized, when the core mold assembly 6 is replaced, the replacement may be directly performed, which is more convenient and improves the production efficiency, the outer diameter of the nesting core mold at the outermost side is slightly smaller than the inner diameter of the mold channel 2, and the difference is 0.2mm-0.4mm, so that on one hand, the nesting core mold at the outermost side can be sleeved into the mold channel 2, on the other hand, the heat transfer efficiency can be effectively ensured, and the nesting core mold can reach the temperature required by the process.
Furthermore, one end of the pultrusion channel is in a round mouth shape, and the other end of the pultrusion channel is in a horn mouth shape.
Specifically, in this embodiment, the pultrusion channel has two ends, one end of the pultrusion channel is set to be in a bell mouth shape, the end far away from the bell mouth shape is in a round mouth shape, one end of the bell mouth is an inlet end, the fiber tows soaked with resin enter the pultrusion channel from one end of the bell mouth, are led out from one end of the round mouth of the pultrusion channel and are pulled by the pultrusion equipment, in the pulling process of the pultrusion equipment, because the inlet end of the pultrusion channel is in the bell mouth shape, when the fiber tows soaked with resin enter the pultrusion channel, the fiber tows enter from the large-caliber end of the bell mouth when entering the pultrusion channel, on one hand, the fiber tows can be prevented from being damaged due to friction between the round mouth end of the nested core mold and the fiber tows, on the other hand, fluffy fibers can be smoothly sent into the pultrusion channel, and the working hour for reintroducing the fiber tows into the pultrusion channel is also reduced, the efficiency of product production can be effectually improved.
Further, one end of the core mold component 6 extends out of the mold passage 2 and protrudes outwards to form a limiting part; the limiting part is abutted against the outer wall of the die main body 1 and is arranged at the same side as the inlet end of the pultrusion channel.
Specifically, in this embodiment, core module 6 has both ends, and wherein one end is the round mouth, and the other end is followed inside outwards following of mould passageway 2 is stretched and outside protrusion, forms spacing portion, spacing portion can adopt the horn mouth shape, the horn mouth shape can be guaranteed that core module 6 is fixed on the mould passageway 2, outwards carries out the off-the-shelf in-process of pultrusion in core module 6 round mouth one end, and core module 6 can not take place to remove, the effect of assurance pultrusion that can be better.
Further, the heating assembly comprises a heat conduction liquid 4 filled inside the containing cavity, and a heating resistor 5 for heating the heat conduction liquid 4.
Specifically, the heat-conducting liquid 4 is filled in the accommodating cavity, the mold channel 2 is completely immersed in the heat-conducting liquid 4, the mold channel 2 is 20mm-30mm lower than the liquid level of the heat-conducting liquid 4, the best heating effect can be achieved within the range, a heating resistor 5 which can be used for heating the heat-conducting liquid 4 is placed in the accommodating cavity, when the mold is used, the heating resistor 5 at the bottom of the mold main body is connected with a power supply, the heat-conducting liquid 4 can be heated, a temperature control system is used for heating and heat preservation control, the heat-conducting liquid 4 is used for conducting heat on the nested core mold, the interior of the nested core mold can be uniformly heated, the heating efficiency and the temperature uniformity of the mold can be controlled, the temperature overshoot phenomenon is avoided, and the quality of a produced product cannot be affected.
Furthermore, the periphery of the die main body 1 is wrapped with a heat insulation sleeve 3.
Specifically, the heat insulating sleeve 3 can be made of a high-temperature-resistant heat insulating material, so that on one hand, the heat insulating effect on the heat conducting liquid 4 in the mold main body 1 can be achieved, the energy loss can be reduced, and on the other hand, the situation that workers are scalded in the working process can be avoided.
Further, the mold body 1 has at least two mold passages 2.
Specifically, one or more of the mold channels 2 may be formed in the upper surface of the mold body 1, and a plurality of the mold channels 2 may be formed, so that the entire mold may be used to form one or more needle-shaped composite material products at one time, and in the production process, a plurality of core mold assemblies 6 of desired sizes are assembled, the assembled core mold assemblies 6 are inserted into the plurality of mold channels 2, and fiber tows soaked with resin are introduced into the mold channels 2, thereby simultaneously producing needle-shaped composite material products of various sizes, and simultaneously producing a large amount of needle-shaped composite materials of the same specification, and improving the production efficiency.
Further, the wall thickness of the innermost nested mandrel is greater than 0.2mm, and the wall thickness of the rest nested mandrels is greater than 0.8 mm.
Specifically, in this embodiment, the innermost nested core mold has a limit inner diameter of 0.6mm and a wall thickness of greater than 0.2mm, which can maintain good stability, is not easily broken, and is beneficial to increasing the size specification of the needle-shaped composite material, and the wall thicknesses of the rest nested core molds are greater than 0.8mm, which is beneficial to better guarantee the innermost nested core mold.
Furthermore, the nested core mold adopts stainless steel capillary tubes with different specifications.
Specifically, in the embodiment, the nesting core mold adopts a stainless steel capillary tube which is a standard goods shelf product, so that the purchase cost is low, and after the forming process is finished, the nesting core mold can be directly replaced without repeated cleaning or cooling; compared with the traditional pultrusion die, the labor cost for cleaning the die is effectively reduced, the cost for treating the solvent and subsequent dangerous chemicals when the die is cleaned is reduced, the production time is saved, and the production efficiency is effectively improved.
The embodiment also provides the nested pultrusion die for the needle-shaped composite material and a using method thereof, wherein the method comprises the following steps:
selecting a nested core mold matched with the diameter of the acicular composite material as an innermost nested core mold;
nesting a nesting core mold with matched size outside the innermost nesting core mold;
when the outer diameter of the nesting core mold at the outermost side is smaller than the inner diameter of the mold channel by 0.2mm-0.4mm, stopping nesting;
sleeving the combined core mold component into the mold channel from the inlet of the needle-shaped composite material;
drawing one end of a fiber tow from an inlet end to an outlet end of the pultrusion channel;
pouring heat-conducting liquid into the mould main body, heating the forming space to the temperature required by the process by using a heating resistor to heat the heat-conducting liquid, and heating and insulating by using a temperature control system;
soaking fiber tows positioned outside the inlet end of the pultrusion channel in resin in a resin dipping tank;
continuously pulling the fiber tows from the outlet end of the pultrusion channel by a tractor, and continuously solidifying the fiber tows soaked in the resin in a forming space to form a needle-shaped composite material finished product;
after the production is finished, the needle-shaped composite material is cut off at the outlet end, the fiber tows soaked in the resin are cut off at the inlet end, and the innermost nested core mold can be directly taken out without being cleaned;
if the product specification needs to be changed, the innermost nested core mold is withdrawn, and the nested core mold matched with the needle-shaped composite material in diameter size is replaced;
when the innermost nested core mold is taken out and installed, the whole mold does not need to be cooled and can be directly replaced, and the innermost nested core mold can quickly reach the process temperature required by molding;
in the production process, if fiber breakage occurs, the innermost nested core mold can be directly replaced.
Specifically, in the embodiment, nested core molds with the inner diameter matched with the diameter of the acicular composite material to be molded are selected to be nested with each other, the outer diameter of the round opening of the innermost nested core mold is smaller than the inner diameter of the round opening of the adjacent outer nested core mold by 0.2mm-0.4mm, when the outer diameter of the outermost nested core mold is smaller than the inner diameter of the mold passage 2 by 0.2mm-0.4mm, nesting is stopped, the wall thickness is larger than 0.2mm, the wall thickness of the rest nested core molds is larger than 0.8mm, the innermost nested core mold is favorably protected, the nested core mold assembly 6 is nested into the mold passage 2 arranged on the mold main body 1, a pultrusion passage is arranged in the core mold assembly 6, one end of the pultrusion passage is in the shape of the round opening, the other end of the pultrusion passage is in the shape of the horn opening, fiber tows enter the pultrusion passage 2 from one end of the horn opening, the outlet end of the pultrusion passage 2 is led out, heat-conducting liquid is poured into the mold main body 1, heating the heat-conducting liquid 4 by using a heating resistor 5 until the temperature inside the molding space reaches the temperature required by the process, heating and controlling the temperature of the molding space by using a temperature control system to keep the temperature inside the molding space at the temperature required by the process, infiltrating the fiber tows positioned outside the inlet end of the pultrusion channel by using resin, continuously pulling the fiber tows at the outlet end of the pultrusion channel by using a tractor to enable the fiber tows infiltrated with the resin to enter the molding space to solidify the resin so as to form a needle-shaped composite material finished product, drawing by using a drawing device, wherein the cross-sectional dimension of the drawn needle-shaped composite material is the same as the dimension of the inner diameter of the nested core mold, continuously drawing the needle-shaped composite material by using the pultrusion device to realize large-scale continuous production, and cutting off the needle-shaped composite material finished product positioned at the outlet end after the production is finished, the fiber tows soaked with the resin are cut off at an inlet, so that the innermost nested core mold can be taken out, if needle-shaped composite materials with different specifications need to be produced, the innermost nested core mold is directly taken out, the nested core mold matched with the needle-shaped composite material to be produced in size is replaced, when the innermost nested core mold is taken out or installed, the whole mold does not need to be cooled, the mold can be directly replaced, after the replacement, the innermost nested core mold can quickly reach the process temperature needed by the needle-shaped composite material forming, and the production efficiency is improved.
Example 2
This embodiment is a method of using the mold provided in embodiment 1, the method comprising:
when the needle-shaped composite material with a certain diameter is continuously produced in a large scale, the needle-shaped composite material with another diameter needs to be formed, firstly, the innermost nested core mold is taken out, and the nested core mold matched with the diameter of the needle-shaped composite material to be produced is selected to be arranged on the through hole 2 of the mold; the innermost nested core mold can be directly taken out without cooling when being taken out and installed, and after a new mold is installed, the innermost nested core mold can quickly reach the temperature required by the process, and the production of products with new specifications can be quickly put into production.
Example 3
The embodiment is a use method based on the embodiment 2, and the method comprises the following steps:
when the production is interrupted if the fiber tows are broken in the production process, the innermost nested core mold can be directly taken out, the nested core mold does not need to be cleaned, the nested core mold with the same size is directly replaced and placed into the through hole 2 of the mold, and the production can be continued.
Example 4
The embodiment is a use method based on embodiment 3, and the method comprises the following steps:
when the needle-shaped composite materials with different specifications are required to be produced simultaneously, the plurality of mould channels 2 can be formed in the mould main body, the needle-shaped composite materials with different specifications can be produced simultaneously, a large amount of needle-shaped composite materials with the same specification can be produced simultaneously, and the mould main body has universality and can reduce the input cost of the mould.
The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. The foregoing are only preferred embodiments of the present application and it should be noted that there are no more than a few objective specific configurations due to the limited nature of the words that may be employed, and that modifications, decorations, or changes may be made by those skilled in the art without departing from the principles of the present invention or the technical features described above may be combined in any suitable manner; such modifications, variations, combinations, or adaptations of the invention in other instances, which may or may not be practiced, are intended to be within the scope of the present application.
Claims (10)
1. A needle-shaped composite material nested pultrusion die and a using method thereof are characterized by comprising the following steps:
the mould comprises a mould main body (1), wherein an accommodating cavity with an opening at the top is formed in the mould main body (1); the die main body (1) is also provided with a die channel (2) which penetrates through the accommodating cavity along the horizontal direction;
the core die assembly (6), the core die assembly (6) is installed in the die channel (2), the core die assembly (6) is provided with a pultrusion channel, and the pultrusion channel provides a molding space for the fiber tows soaked with the resin;
and the heating component is arranged in the accommodating cavity and used for heating the forming space so as to cure the resin infiltrated into the fiber tows to form a needle-shaped composite material finished product.
2. The nested pultrusion die for the acicular composite material as claimed in claim 1, wherein the mandrel assembly (6) comprises at least two nested mandrels nested with each other, and in two adjacent nested mandrels, the difference between the outer diameter of the inner nested mandrel and the inner diameter of the outer nested mandrel is 0.2mm-0.4mm, and the two adjacent nested mandrels are detachably assembled.
3. The needle composite nesting pultrusion die of claim 1, wherein one end of the pultrusion channel is round and the other end of the pultrusion channel is flared.
4. The nested pultrusion die for acicular composite materials according to claim 1, characterized in that one end of the mandrel assembly (6) protrudes from the die channel (2) and protrudes outwards to form a limit part; the limiting part is abutted against the outer wall of the die main body (1) and arranged at the same side as the inlet end of the pultrusion channel.
5. An acicular composite nesting pultrusion die according to claim 1, characterized in that the heating assembly comprises a heat-conducting liquid (4) filled inside the receiving cavity and a heating resistor (5) for heating the heat-conducting liquid (4).
6. The nested pultrusion die for the needle-shaped composite materials as claimed in claim 1, characterized in that the die body (1) is wrapped with a heat insulation sleeve (3) at the periphery.
7. An acicular composite nested pultrusion die as claimed in claim 1, characterized in that the die body (1) has at least two die channels (2).
8. The nested pultrusion die of claim 2, wherein the wall thickness of the innermost nested mandrel is greater than 0.2mm, and the wall thickness of the remaining nested mandrels is greater than 0.8 mm.
9. The nested pultrusion die for the needle-shaped composite materials as claimed in claim 2, wherein the nested core dies are made of stainless steel capillaries with different specifications.
10. A method for using the needle-shaped composite nested pultrusion die as claimed in claims 2 to 9, which is characterized by comprising the following specific steps:
selecting a nested core mold matched with the diameter of the acicular composite material as an innermost nested core mold;
nesting a nesting core mold with matched size outside the innermost nesting core mold;
when the outer diameter of the nesting core mold at the outermost side is smaller than the inner diameter of the mold channel by 0.2mm-0.4mm, stopping nesting;
sleeving the combined core mold component into the mold channel from the inlet of the needle-shaped composite material;
drawing one end of a fiber tow from an inlet end to an outlet end of the pultrusion channel;
pouring heat-conducting liquid into the mould main body, heating the forming space to the temperature required by the process by using a heating resistor to heat the heat-conducting liquid, and heating and insulating by using a temperature control system;
infiltrating the fiber tows positioned outside the inlet end of the pultrusion channel with resin in a resin impregnation tank;
continuously pulling the fiber tows from the outlet end of the pultrusion channel by a tractor, and continuously solidifying the fiber tows soaked in the resin in a forming space to form a needle-shaped composite material finished product;
after the production is finished, the needle-shaped composite material is cut off at the outlet end, the fiber tows soaked in the resin are cut off at the inlet end, and the innermost nested core mold can be directly taken out without cleaning;
if the product specification needs to be changed, the innermost nested core mold is withdrawn, and the nested core mold matched with the needle-shaped composite material in diameter size is replaced;
when the innermost nested core mold is taken out and installed, the whole mold does not need to be cooled and can be directly replaced, and the innermost nested core mold can quickly reach the process temperature required by molding;
in the production process, if fiber breakage occurs, the innermost nested core mold can be directly replaced.
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| CN202210654918.2A CN114986944A (en) | 2022-06-10 | 2022-06-10 | Needle-shaped composite nested pultrusion die and using method thereof |
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| CN202210654918.2A CN114986944A (en) | 2022-06-10 | 2022-06-10 | Needle-shaped composite nested pultrusion die and using method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115923195A (en) * | 2022-11-11 | 2023-04-07 | 江苏高路复合材料有限公司 | Method for extracting resin adhered to inner wall from pultrusion die and pultrusion production process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115923195A (en) * | 2022-11-11 | 2023-04-07 | 江苏高路复合材料有限公司 | Method for extracting resin adhered to inner wall from pultrusion die and pultrusion production process |
| CN115923195B (en) * | 2022-11-11 | 2024-05-14 | 江苏高路复合材料有限公司 | Method for taking out resin adhered on inner wall from pultrusion die and pultrusion production process |
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