CN107415281B - A method of table tennis bat is prepared using HSM moulding process - Google Patents
A method of table tennis bat is prepared using HSM moulding process Download PDFInfo
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- CN107415281B CN107415281B CN201710891070.4A CN201710891070A CN107415281B CN 107415281 B CN107415281 B CN 107415281B CN 201710891070 A CN201710891070 A CN 201710891070A CN 107415281 B CN107415281 B CN 107415281B
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- table tennis
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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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
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- 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
- B29L2031/00—Other particular articles
- B29L2031/52—Sports equipment ; Games; Articles for amusement; Toys
- B29L2031/5245—Rackets
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a kind of methods for preparing table tennis bat using HSM moulding process.The hot self-expanding high-energy rubber of shaping pre-shaped is first put into product core material mold and closes tight mold, it 80-100 DEG C, heats 3-30 minutes, microdilatancy, wherein the volume multiplying power before and after microdilatancy is 1.01-1.5, full of core material die cavity, cooling and demolding, then wraps up Fiber prepreg and be put into molding die and close tight mold, 120-180 DEG C, heating 10-60 minutes, the hot self-expanding high-energy rubber of shaping pre-shaped therein continue the heated expansive force generated from inside to outside, the molding of Fiber prepreg hot setting；Cooling and demolding pickup.The intensity for the table tennis bat that method of the invention is prepared is high, and fraction defective is low.
Description
Technical field
Material forming field is answered the present invention relates to fiber more particularly to a kind of table tennis bat is prepared using HSM moulding process
Method.
Background technique
Traditional fiber answers the preparation method of material product, there are several types of；
First, hand paste process, under an atmospheric pressure environment, there are problem, hand paste resin is mostly solvent type, and smell weight is not
Environmental protection is unfavorable for operator's health, needs the longer room temperature curing production cycle, is substantially at superseded state；
Second, core material mould pressing process, the pressure of product at the time of molding comes from external press, i.e., using outside rigid foam core material
Then outer package Fiber prepreg pre-shaped is good again for packet glued layer, used in hard foam have PMI, PU, PVC, Ba Sha
Wood etc. needs to first pass through CNC and is cut into preparatory shape core material, is put into die cavity, and heating pressurization, resin solidification molding obtains product,
Efficiency is higher, there are the problem of: 1, complex procedures rigid foam core material needs preparatory CNC cutting, increases equipment investment, 2, foam
It must additionally be added glued layer between core material and Fiber prepreg, increase Material Cost, 3, due to unbalance stress, it is difficult to obtain excellent
Good products appearance；4, there is no the inter-layer bonding forces of expansive force therefore fiber from inside to outside during compression molding for core material
Bad, in conjunction with inhomogenous, easy delamination causes the integral strength of product to decline；5, large-sized workpiece needs large-scale tonnage
Press, equipment investment is big, is unfavorable for popularizing.
Third, nylon wind pipe air blowing is hot-forming, i.e., Fiber prepreg is wrapped in the outside of nylon wind pipe, by package
Product is put into die cavity, and molding is blown while heating, and product expansion is made to be full of die cavity, while resin solidification, cooling die sinking
Take out product.There are problem, 1, blow hot-forming, there is the fraction defective of the 3-5% generated due to gas leakage in the sector；2, it needs
Want the investment of blowing device；3, the prefabrication that Fiber prepreg package high-energy rubber obtains is since non-cubic support construction leads to product
Size is difficult to stability contorting, is easy to produce the fraction defectives phenomenon such as fiber lay down fault position in final product；4, belong to batch production
Operation mode, production efficiency are low；5, the part with complicated structure is limited by air hose shape to be difficult to be applicable in.
Chinese patent CN103146216B discloses a kind of high-energy rubber product, preparation method and its usage, briefly, open
A kind of sheet material or membrane material of heating expansion, are obtained using coating method, can be used to substitute the mode of nylon wind pipe, by carbon
Cloth is wrapped in outside, be put into mold and closing heated in tight mold it is i.e. plastic.Or it is directly high with Fiber prepreg package sheet material
Energy glue, then heats expansion molding one-step method.There are the following problems:
1, the high-energy rubber of sheet is suitable only for preparing the product of 2D effect in packet carbon cloth pre-shaped；2, the size of the product of pre-shaped
Precision controlling inaccuracy, bad rate is higher；3, the thickness of product is more than 0.5cm, the size of carbon cloth pre-shaped and size after molding
It differs greatly, will cause the inflated power of fiber during expansion molding and pull, generate stress and concentrate, the interlayer inside product
Binding force is inconsistent, and especially complicated thick product quality is uncontrollable.
Summary of the invention
To solve the above problems, preparing table tennis bat using HSM moulding process the purpose of the present invention is to provide a kind of
Method.Wherein HSM is the abbreviation of Heat Self Molding.
To achieve the above object, the present invention provides a kind of method for preparing table tennis bat using HSM moulding process, feature
It is,
The preparation of pre-shaped core material: the hot self-expanding high-energy rubber of shaping pre-shaped is put into product core material mold and closes tight mold,
Temperature heats 3-30 minutes, microdilatancy at 80-100 DEG C, and wherein the volume multiplying power scope before and after microdilatancy is 1.01-1.5, fills
Full die cavity, it is cooling, obtain pre-shaped core material；
It wraps up Fiber prepreg again outside above-mentioned pre-shaped core material and obtains multiple material precast body；
Be put into molding die and close tight mold, 120-180 DEG C heating 10-60 minutes；The multiple prefabricated intracorporal shaping of material is pre-
The hot self-expanding high-energy rubber of type continues the heated expansive force generated from inside to outside, the molding of Fiber prepreg hot setting；
Cooling and demolding pickup is up to table tennis bat.
Further, the reflation intensity of the hot self-expanding high-energy rubber of the shaping pre-shaped≤pure multiple material product is in 1% shape
Resistance to deformation intensity under becoming.
Further, the hot self-expanding high-energy rubber of the shaping pre-shaped refers to can star expansion in certain temperature range
Plastic thermosetting polymeric composition, 80-100 DEG C of starting expansion initial stage, volume multiplying power is 1.01-1.5 before and after slight expansion
Times, heating time 5-30 minute, bulbs of pressure 0.05-0.2MPa；In 120-180 DEG C of optimum expansion temperature, heating time 5-60
Minute, expansion front and back volume multiplying power is 1.01-1.5 times, bulbs of pressure 0.1-20MPa.
Further, the Fiber prepreg is carbon fibre initial rinse fabric, glass fibre prepreg cloth or aramid fiber prepreg cloth.
Volume multiplying power before and after the microdilatancy is the volume before volume/expansion after expansion.
The difference of core material mold and molding die is, volume/molding die volume=90%- of core material mold
99%, the overall volume of core material mold is slightly less than molding die, and remaining space is for wrapping up Fiber prepreg.
When subsequent product also needs to be heat-treated, heat-treatment temperature range is generally 60-200 DEG C.When in this temperature range
When, hot self-expanding high-energy rubber can generate expansive force from inside to outside, which may result in product deformation, when subsequent system
It is anti-under 1% deformation that product heat the expansion strength produced by time control heating self-expanding high-energy rubber from inside to outside≤pure multiple material product
Deformation intensity, (expansion strength refers to expansive force suffered on multiple material unit area, and resistance to deformation intensity refers in 1% shape
Become test pressure suffered on lower material unit area again) destruction of the subsequent heat expansive force to product can be overcome, otherwise control
Improper, expansive force exceeds the resistance to deformation intensity 1% of product, and products appearance can deform, and generates explosion, the bad phenomenon of warpage.Hair
Bright people is expanded with heat and contract with cold in view of general-use article heating expansion Shi Douyou, and expanding with heat and contract with cold for itself may bring 0 percent
Several deformation of point, therefore inventor finally eliminates the influence for the deformation expanded with heat and contract with cold in itself, using pure multiple material product in 1% deformation
Under resistance to deformation intensity, as assessment dimensional stability foundation.
The pure multiple material product refers to the multiple material product without containing high-energy rubber filling, is only fiber and resin molding compound
Product.The pure multiple material product is compared with the fiber answers material product, hot self-expanding of the inside without containing filling shaping pre-shaped
High-energy rubber.
The different process of the present invention and the prior art is to prepare the product of hot self-expanding, first step acquisition using two-step method
The pre-shaped core material of microdilatancy；Second step package Fiber prepreg obtains multiple material precast body, and then heating expansion obtains product in place.
Previous process route is directly to wrap up the hot self-expanding high-energy rubber of sheet material with Fiber prepreg, then heats one step of expansion molding
Method；Compare both the above method, the advantage of two-step method of the invention: 1, the hot self-expanding high-energy rubber pre-shaped by the first step obtains
Pre-shaped core material, the 2D structure of thin-film sheet high-energy rubber different from the past, can obtain 3D core material, therefore be more suitable and need solid
The wrap member of the Fiber prepreg of support table tennis bat such as of the invention, the product size after wrapping up in this way are more nearly finally
Shape excessive will not cause fibrous material because of the change in size of expansion front and back in next step plus when thermal expansion curing molding
Deformation is pullled in expansion process, influences the lot stability of product, and the stress generated due to unbalance stress is overcome to concentrate,
Cause the fraction defectives such as product warpage.2, the products thickness that is more suitable is more than the complicated shape product of 1cm.3, due to using the first step
The operation of prefabricated core material can obtain the prefabricated core material of accurate dimension, can preferably control the dimensional accuracy of product, improve product
Yield；4, prefabricated core material is answered in material forming process in second step and fiber, will receive that internal prefabricated core material is heated to reexpand
Power causes fiber to answer material by extruding force from inside to outside, to improve inter-layer bonding force, the intensity for causing product final into
One step is promoted；5, the present invention claims shaping pre-shaped high-energy rubber reflation intensity≤pure multiple material product under 1% deformation
Resistance to deformation intensity, it is possible to prevente effectively from product subsequent heat deform, overcome resulting product fraction defective.
Detailed description of the invention
Fig. 1 is table tennis bat schematic diagram of the present invention.
Fig. 2 is table tennis bat structure partial sectional view of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, the examples of the embodiments are being intended to be used to explain the present invention, without
It can be interpreted as limitation of the present invention.In the examples where no specific technique or condition is specified, it is retouched according to the literature in the art
The technology or conditions stated are carried out according to product description.Reagents or instruments used without specified manufacturer, being can be with
Conventional products that are commercially available.
The hot self-expanding high-energy rubber of shaping pre-shaped used provides for the production of Hao Er new material limited liability company, Xiamen City
Hot self-expanding high-energy rubber/HR-330 or HR-313.
Embodiment 1: the preparation of table tennis bat
The hot self-expanding high-energy rubber HR-330 of shaping pre-shaped is put into product core material mold and closes tight mold by the first step,
80 DEG C are heated 15 minutes, microdilatancy, and wherein the volume multiplying power before and after microdilatancy is 1.1, are full of die cavity, cooling, obtain table tennis
Clap prefabricated core material；
It is pre- to wrap up three layers of carbon fibre initial rinse fabrics acquisition table tennis bat again outside the prefabricated core material of above-mentioned table tennis bat for second step
Body processed is put into molding die and closes tight mold, is heated to 150 DEG C, 30 minutes；Internal hot self-expanding high-energy rubber is heated at this time
Expansive force from inside to outside can be generated afterwards, while carbon fibre initial rinse fabric curing molding, cooling and demolding pickup obtain table tennis bat.Knot
Structure is shown in Fig. 1 and Fig. 2.Wherein 1 be shaping pre-shaped hot self-expanding high-energy rubber, 2 be Fiber prepreg, and 3 be table tennis bat.
The table tennis bat being prepared toasts 4 hours in 100 DEG C of baking ovens, the size of comparison table tennis bat baking front and back, partially
Less than 1%, appearance is not affected difference.
Use PMI rigid foam for the table tennis bat of same shape made of core material, production process is as follows: 1, cutting carbon fiber
Prepreg cloth is tieed up, CNC cuts PMI rigid foam and glued layer (bicomponent epoxy resin glue)；2, intermediate according to ply stacking-sequence
It is glued layer outward for PMI foam, then is three layers of Fiber prepreg outward, is put into molding die and closes tight mold, heating 150
DEG C, 30 minutes；3, cooling and demolding takes out board product.Comparison maintains same product at a low density such as 0.25g/cm3(usually
If the density of solid carbon fiber product is in 1.6-1.8g/cm3) product that obtains of above two method using identical item
Part carries out three-point bend test, and table tennis bat intensity ratio made of the present invention uses PMI rigid foam for table tennis made of core material
The strength enhancing 20.5% of racket, illustrates the effect that high-strength light may be implemented.
Embodiment 2: the preparation of table tennis bat
The hot self-expanding high-energy rubber HR-313 of shaping pre-shaped is put into product core material mold and closes tight mold by the first step,
100 DEG C are heated 3 minutes, microdilatancy, and wherein the volume multiplying power before and after microdilatancy is 1.01, are full of die cavity, cooling, obtain table tennis
Clap prefabricated core material；
It is pre- to wrap up three layers of carbon fibre initial rinse fabrics acquisition table tennis bat again outside the prefabricated core material of above-mentioned table tennis bat for second step
Body processed is put into molding die and closes tight mold, is heated to 180 DEG C, 10 minutes；Internal hot self-expanding high-energy rubber is heated at this time
Expansive force from inside to outside can be generated afterwards, while carbon fibre initial rinse fabric curing molding, cooling and demolding pickup obtain table tennis bat.Knot
Structure is shown in Fig. 1 and Fig. 2.Wherein 1 be shaping pre-shaped hot self-expanding high-energy rubber, 2 be Fiber prepreg, and 3 be table tennis bat.
The table tennis bat being prepared toasts 4 hours in 100 DEG C of baking ovens, the size of comparison table tennis bat baking front and back, partially
Less than 1%, appearance is not affected difference.
For the table tennis bat of same shape made of core material, production process is as follows: 1, cutting carbon with PMI rigid foam is used
Fiber prepreg, CNC cut PMI rigid foam and glued layer (bicomponent epoxy resin glue)；2, according to ply stacking-sequence, in
Between be PMI foam, be glued layer outward, then be three layers of Fiber prepreg outward, be put into molding die and close tight mold, heat
150 DEG C, 30 minutes；3, cooling and demolding takes out board product.Comparison maintains same product at a low density such as 0.25g/cm3It is (logical
If the density of often solid carbon fiber product is in 1.6-1.8g/cm3) product that obtains of above two method is using identical
Condition carries out three-point bend test, and table tennis bat intensity ratio made of the present invention uses PMI rigid foam for table tennis made of core material
The strength enhancing 25.1% of pang racket, illustrates the effect that high-strength light may be implemented.
Embodiment 3: the preparation of table tennis bat
The first step, the hot self-expanding high-energy rubber HR-313 of shaping pre-shaped are put into product core material mold and close tight mold, temperature
Degree heats 30 minutes, microdilatancy at 90 DEG C, and wherein the volume multiplying power before and after microdilatancy is 1.5, is full of die cavity, cooling, obtains table tennis
Pang racket core material；
Second step wraps up triplex glass Fiber prepreg outside above-mentioned table tennis bat core material again；It is put into molding die simultaneously
Tight mold is closed, is heated to 120 DEG C, 60 minutes；Hot self-expanding high-energy rubber can generate expansive force from inside to outside after heated at this time,
Glass fibre prepreg cloth curing molding, cooling and demolding pickup obtain table tennis bat simultaneously.Structure is shown in Fig. 1 and Fig. 2.Wherein 1 be can
The hot self-expanding high-energy rubber of moulding pre-shaped, 2 be Fiber prepreg, and 3 be table tennis bat.
The table tennis bat being prepared toasts 4 hours in 100 DEG C of baking ovens, the size of comparison table tennis bat baking front and back, partially
Difference is less than 1%.
It is compared with using the hot-forming hollow table tennis bat that same shape is made of blowing, production process is as follows: 1, cutting
Glass fibre prepreg cloth, nylon wind pipe, opposite nylon wind pipe carry out release processing (extracting out after facilitating molding)；2, by glass fibre
Four layers of prepreg cloth are wrapped in outside nylon wind pipe the nylon wind for obtaining table tennis bat precast body, while closing wherein one end one by one
Pipe, the other end connect tuyere and are used for the connection air compressor machine inflation in hot briquetting；3, above-mentioned table tennis bat precast body is put into
Pattern has and closes tight mold, heats 160 DEG C, and 60 minutes, cooling and demolding took out table tennis bat product, extracted nylon wind pipe out, obtained
Hollow table tennis bat.Comparison maintains same product at a low density such as 0.25g/cm3If (usually solid carbon fiber system
The density of product is in 1.6-1.8g/cm3) product that obtains of above two method carrying out three-point bending survey using identical condition
It tries, table tennis bat intensity made of the present invention is than the intensity using the hot-forming hollow table tennis bat that same shape is made of blowing
26.5% is promoted, illustrates the effect that high-strength light may be implemented.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.
Claims (3)
1. a kind of method for preparing table tennis bat using HSM moulding process, which is characterized in that
The preparation of pre-shaped core material: the hot self-expanding high-energy rubber of shaping pre-shaped is put into product core material mold and closes tight mold, temperature
It at 80-100 DEG C, heats 3-30 minutes, microdilatancy, wherein the volume multiplying power scope before and after microdilatancy is 1.01-1.5, is full of mould
Chamber, it is cooling, obtain pre-shaped core material；The reflation intensity of the hot self-expanding high-energy rubber of the shaping pre-shaped≤pure multiple material product exists
Resistance to deformation intensity under 1% deformation；
It wraps up Fiber prepreg again outside above-mentioned pre-shaped core material and obtains multiple material precast body；
Be put into molding die and close tight mold, 120-180 DEG C heating 10-60 minutes；The multiple prefabricated intracorporal shaping pre-shaped of material
Hot self-expanding high-energy rubber continues the heated expansive force generated from inside to outside, the molding of Fiber prepreg hot setting；
Cooling and demolding pickup is up to table tennis bat.
2. the method that claim 1 prepares table tennis bat using HSM moulding process, which is characterized in that the shaping pre-shaped
Hot self-expanding high-energy rubber refers to the plastic thermosetting polymeric composition that can star expansion in certain temperature range, in 80-100
DEG C starting expansion initial stage, volume multiplying power is 1.01-1.5 times before and after slight expansion, heating time 5-30 minute, the bulbs of pressure
0.05-0.2MPa；In 120-180 DEG C of optimum expansion temperature, heating time 5-60 minute, expansion front and back volume multiplying power is 1.01-
1.5 times, bulbs of pressure 0.1-20MPa.
3. the method for preparing table tennis bat using HSM moulding process described in claim 1, which is characterized in that the fiber prepreg
Cloth is carbon fibre initial rinse fabric, glass fibre prepreg cloth or aramid fiber prepreg cloth.
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| CN201710891070.4A CN107415281B (en) | 2017-09-27 | 2017-09-27 | A method of table tennis bat is prepared using HSM moulding process |
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Effective date of registration: 20210203 Address after: 361000 unit 104, 29 Xianghong Road, industrial zone, torch hi tech Zone (Xiang'an), Xiamen City, Fujian Province Patentee after: XIAMEN ZHONGHAOQIANG CARBON FIBER COMPOSITE MATERIALS Co.,Ltd. Address before: 361000 No.29 Xianghong Road, torch hi tech Zone (Xiang'an) Industrial Zone, Xiang'an District, Xiamen City, Fujian Province Patentee before: XIAMEN HOWER MATERIAL Co.,Ltd. |
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