CN106693277A - Dumbbell, dumbbell head rubber-covering mold and dumbbell forming technique - Google Patents
Dumbbell, dumbbell head rubber-covering mold and dumbbell forming technique Download PDFInfo
- Publication number
- CN106693277A CN106693277A CN201611183754.0A CN201611183754A CN106693277A CN 106693277 A CN106693277 A CN 106693277A CN 201611183754 A CN201611183754 A CN 201611183754A CN 106693277 A CN106693277 A CN 106693277A
- Authority
- CN
- China
- Prior art keywords
- dumbbell
- head
- die cavity
- plate
- bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
- A63B21/06—User-manipulated weights
- A63B21/072—Dumb-bells, bar-bells or the like, e.g. weight discs having an integral peripheral handle
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
Abstract
The invention provides a dumbbell, a dumbbell head rubber-covering mold and a dumbbell forming technique; the dumbbell comprises a dumbbell bar, dumbbell heads fixedly connected to two ends of the dumbbell bar, and rubber-covering layers covering the outer sides of the dumbbell heads; the two dumbbell heads are fully covered in their respective rubber-covering layers via single injection molding through an injection molding machine and an injection mold; the dumbbell head rubber-covering mold is a two-plate injection mold, comprising a lower fixing plate, a bottom pin plate, a top pin plate, an ejector plate, a holding plate, a male plate, a female plate, a nozzle push plate and an upper fixing plate. The rubber-covering layers at the outer sides of the two dumbbell heads of the dumbbell are formed by using the injection molding machine and the injection mold at the same time, forming steps are few, the production speed is high, no injection molding material is wasted, and the cost is saved; the outer surfaces of the rubber-covering layers formed by injection molding are smooth with few parting lines, and the dumbbell is healthy, durable, environmentally friendly and long in service life.
Description
Technical field
The invention belongs to body-building apparatus technical field, and in particular to the shaping of a kind of dumbbell, dumbbell head encapsulation die and dumbbell
Technique.
Background technology
Dumbbell is a kind of auxiliary appliance of weight lifting and exercise, because easy to use, occupation of land is small, increasingly by vast
The favor of fitness enthusiasts.Dumbbell has one handle, and a dumbbell head is arranged with the handle two ends, being hold by one hand hand when using
Handle, the purpose of motion or weight training is reached by moving arm muscles repeatedly.
For general motion equipment or weight training equipment, dumbbell belongs to small-sized equipment, deeper compared with other large-scale equipment
Enter daily life, therefore outside practicality, upper convenience form and security requirement level higher not only used for it,
Expect that dumbbell there can be more pleasing appearance to represent the personal taste of user and style.
Dumbbell head is manufactured using cast iron mostly, is the damage for avoiding causing ground or floor when directly being contacted with ground, often
In dumbbell head peripheral hardware clad, polyurethane being used traditional dumbbell head clad more（PU）, polyurethane（PU）The entitled poly- ammonia of Chinese
Carbamate, because it only needs to simple modification formula, just can obtain the physical properties such as different density, elasticity, rigidity, at present
Glass fibre thermal insulation material, timber, traditional rubber products etc. are largely substituted.But the more difficult tune of the Shooting Technique of PU, because
If its smaller temperature of injection window is too high, mobility can be very good, if temperature is too low, and possible short shot, so adjusting
Section gets up to waste time and energy.At present, when dumbbell producer coats PU layers on the outside of dumbbell head, use more and pour or directly to encapsulation die
The mode of interior filling PU pieces, it is necessary in 150 ~ 200 DEG C, 63 ~ 200MPa, 10 ~ 30min of hot pressing could be molded using hydraulic press, into
The type time is long, low production efficiency, and polyurethane（PU）About 2.4 ten thousand yuan/ton of cost, the polyurethane of generation（PU）Waste material again not
Can reuse, so the clad of dumbbell head is very high using the cost of polyurethane.
TPU（Thermoplastic polyurethanes）Entitled TPUE rubber, mainly has poly-
Ester type and polyether-type point, its hardness range is wide, wear-resisting, oil resistant, and transparent, elasticity is good, in commodity, sports goods, toy, dress
The fields such as exterior material are used widely, and halogen-free flameproof TPU can also replace flexible PVC to meet the environmental protection in more and more fields
It is required that.The hardness range of TPU is wide, by changing the proportioning of each reactive components of TPU, can obtain the product of different hardness, and
With the increase of hardness, its product still keeps good elasticity and wearability；High mechanical strength：It is the bearing capacity of TPU products, anti-
Impact and damping performance are protruded；Good processability, can be processed using the processing method of common thermoplastic, such as be noted
Modeling, extrusion, calendering etc..
At present, the molding mode of the encapsulated layer of dumbbell head mainly has following three kinds：First, hot-forming using sheet rubber, it is adopted
Mould is as shown in figure 9, the Kazakhstan being made up of left and right bottom end cover including bottom end cover, middle sleeve and upper press cover, bottom end cover
Husband's structure, when encapsulated, a dumbbell head is placed on the workbench top of rubber coating machine first, and the remainder of dumbbell is located at workbench
, then be positioned over bottom end cover between dumbbell head and workbench by lower section, and middle sleeve is enclosed within into dumbbell head outside, now, Xiang Zhongtao
Sheet rubber is clogged between cylinder and dumbbell head, filling to sheet rubber is covered in the upper of sheet rubber upper press cover after overflowing middle sleeve upper end
Side, press-fitting mould under hydraulic press, after pressurize, deflation cycles certain hour, dumbbell is taken out in die sinking, completes the encapsulated of single dumbbell head
Layer.This encapsulated formable layer technique is common process, is had the disadvantage that：An encapsulated layer for dumbbell head can only be once molded,
Low production efficiency；Between middle sleeve and dumbbell head clog sheet rubber need to be more than actually required rubber mass, therefore every time it is encapsulated all
Have a surplus material, and can not reuse, waste serious；PU pieces being used sheet rubber, taste is big, not environmentally, has on the encapsulated layer of shaping more
Two circle parting lines, and outward appearance is not especially smooth, poor visual effect.2nd, using TPU slurries injection mouldings, its injection for using
As shown in Figure 10, it is three template dies to mould, when encapsulated, one of dumbbell head is placed in injection mold, another dumbbell head
It is clamped in the claw below mould, then to injection TPU slurries in die cavity, it then follows conventional injection molding process injection moulding is mute
The encapsulated layer of bell head.Because being molded using TPU slurries, there is no feed back, waste of material will not be produced, but can only once be molded
One encapsulated layer of dumbbell head, low production efficiency；And injection mold is three template dies, is still with two circles on the encapsulated layer after shaping
Parting line, poor visual effect.Above two molding mode be single be molded an encapsulated layer for dumbbell head, low production efficiency,
To solve the problem, the third molding mode is occurred in that, the molding mode is also to use Shooting Technique, its injection mold for using
As shown in figure 11, it is two template dies, one thimble is respectively set at the left and right two ends of die cavity, the end of two dumbbell heads is provided with and thimble head
Be fixed on dumbbell in mould by the location hole of matching, the thimble at two ends, then using the encapsulated layer of injection machine injection moulding.The injection
The mode of encapsulated layer is molded, the encapsulated layer of two dumbbell heads of dumbbell once can be simultaneously molded, but because using thimble fixation side
Formula, when encapsulated, the position of thimble can not be wrapped by, therefore it is encapsulated after the completion of, dumbbell cephalic par have one piece it is not encapsulated
Region, usual manner be using end cap bond or be fastened on dumbbell head, by leak iron region seal up, but bond or fasten
End cap easily come off, reduce product quality.Because the allotment of TPU slurries it is blocked up or it is excessively dilute be all unfavorable for injection moulding, be molded mute
During the encapsulated layer of bell head, the allotment of its concentration needs operator's rich experience, material component and debugs repeatedly just succeed,
So still rare as dumbbell head cover material by the use of TPU.For hexagonal dumbbell, because if it happens it revolve in injection mold
Turn that leakage iron situation just occurs, along with the bad allotment of TPU slurries, not yet occur the encapsulated of hexagonal dumbbell head in the market
Layer uses TPU materials.
The content of the invention
Present invention aim to address the problem that above-mentioned several encapsulated techniques are present, there is provided a kind of dumbbell, dumbbell head are encapsulated
Mould and dumbbell moulding process, production efficiency are high, low cost, good product quality.
In order to solve the above technical problems, embodiments of the invention provide a kind of dumbbell, including dumbbell bar, it is fixed on dumbbell bar
The dumbbell head at two ends and the encapsulated layer being coated on the outside of dumbbell head, dumbbell head described in two pass through injection machine and injection mold one
Secondary injection ground is wrapped in respective encapsulated layer entirely.
Wherein, the end face towards dumbbell bar of the encapsulated layer is provided with cast gate print.
Wherein, only has the parting line of a circle and the axis co-planar of dumbbell bar on the encapsulated layer.
Wherein, two sections of round platform sections connected with miner diameter end are provided with the neighbouring dumbbell head of the dumbbell bar.
Wherein, the interlude of the dumbbell bar is provided with anti-slip veins.
The embodiment of the present invention also provides a kind of dumbbell, including dumbbell bar, is fixed on the dumbbell head and bag at dumbbell bar two ends
The encapsulated layer on the outside of dumbbell head is overlying on, the dumbbell head is hexagonal bell head, and the material of the encapsulated layer is TPU.
Further, hexagonal bell head described in two is wrapped in respective encapsulated with being once molded entirely by injection machine and injection mold
In layer.
The embodiment of the present invention also provides a kind of dumbbell head encapsulation die of above-mentioned dumbbell, and it is injection mold, including：
Bottom plate, which is provided with ejection hole；
Bottom needle plate, is stacked at the top of the bottom plate；
Face needle plate, is stacked at the top of the bottom needle plate and connection fixed thereto；
Top board, is fixed on the top of the face needle plate；
Supporting plate, located at the top of the face needle plate, and is provided with ejection gap between the face needle plate；
Male template, is stacked at the top of the supporting plate and connection fixed thereto；
The junction of caster, the detachable top for being connected to male template, the caster and male template be provided with outside dumbbell
The die cavity of shape matching, the die cavity includes that left dumbbell head die cavity, right dumbbell head die cavity and the left dumbbell head die cavity of connection and the right side are mute
The dumbbell bar die cavity in bell head dummy chamber, the upper surface of the caster is provided with the upper running channel vertical relative to dumbbell bar axial space,
Two down sprues relative to dumbbell bar diameter parallel are provided with the die joint of the die cavity, and two down sprues are placed in
The both sides of dumbbell bar, the two ends of the upper running channel are connected by sprue with two down sprues respectively, each down sprue
Two ends connect with left dumbbell head die cavity and right dumbbell head die cavity respectively；The top board extends dumbbell rod-type through supporting plate and male template
At chamber, and the top board is slided relative to supporting plate and male template and set, and the upper end of the top board is combined rear structure with dumbbell bar die cavity
Into die cavity concave surface be brought into close contact with the outer cylinder of dumbbell bar；
Stripper plate, is stacked at the top of caster and connection fixed thereto；
Upper mounted plate, is stacked at the top of stripper plate and connection fixed thereto, and fixed plate is provided with and is pushed away through the mouth of a river
The mouth of a river that plate is connected with upper running channel, is embedded with mouth of a river set in the mouth of a river.
Wherein, the upper end of the top board is detachable is embedded with magnetic block（It is preferred that electromagnet, it is also possible to be arranged on dumbbell bar
At the other surfaces of die cavity）.
Further, the outer cylinder of the dumbbell bar is followed successively by the left face of cylinder, left outside round table surface, left inside round platform from left to right
The path of face, the middle face of cylinder, right interior round table surface, right outer round table surface and right column surface, the left outside round table surface and left inside round table surface
End connects, and the miner diameter end of the right interior round table surface and right outer round table surface connects, the left face of cylinder, the middle face of cylinder and right column surface
External diameter it is identical, the dumbbell bar die cavity include set gradually from left to right with left face of cylinder zero clearance coordinate left post chamber,
Between the outer round table surface zero in center pillar chamber and the right side that the left cone chamber coordinated with left outside round table surface zero clearance and middle face of cylinder zero clearance coordinate
Right cone chamber and the right post chamber with the cooperation of right column surface zero clearance that gap coordinates；
The left end of the upper surface of the top board is the left conical surface coordinated with left outside round table surface zero clearance, and right-hand member is and round table surface outside the right side
The right conical surface that zero clearance coordinates, is the central column face coordinated with middle face of cylinder zero clearance between the left conical surface and the right conical surface.
The embodiment of the present invention also provides a kind of moulding process of above-mentioned dumbbell, it is characterised in that comprise the following steps：
（1）Dumbbell bar and dumbbell head are processed respectively, and in the grip part annular knurl of dumbbell bar, form anti-slip veins；
（2）Two dumbbell heads are respectively welded at the two ends of dumbbell bar, the dumbbell body of formula structure is integrally formed；
（3）Manufacture dumbbell head encapsulation die, including bottom plate, bottom needle plate, face needle plate, top board, supporting plate, male template, caster,
Stripper plate and upper mounted plate, wherein, the die cavity in male template and caster is molded by laser cutting, then will with copper billet electrode
Not round and smooth die cavity seamed edge after laser cutting polishes round and smooth, and each parts finally are assembled together as into two template die injection moulds
Tool；（4）After being well mixed in mixer with 100 parts of TPU particles, 0 ~ 30 part of feed back, 0 ~ 8 part of color masterbatch, being put into dryer is carried out
Drying, is subsequently placed in stand-by in the barrel of injection machine；
（5）By step（3）Injection mold be attached on injection machine, under injection mold die opening state, by step（2）Dumbbell
Body is put to the die cavity of male template, is ajusted, it is ensured that put down with the corresponding inner surface of dumbbell head die cavity in each face of dumbbell head
OK, each seamed edge of dumbbell head and corresponding each seamed edge of dumbbell head die cavity are in the same plane；
（6）Start injection machine, matched moulds, locked mode；
（7）The TPU slurries being thermally formed via injection machine flow into left dumbbell head dummy through the mouth of a river, upper running channel, sprue and down sprue
In chamber and right dumbbell head die cavity, 30 ~ 110MPa of injection pressure, 180 DEG C ~ 240 DEG C of injection temperature, 2 ~ 5min of heat-insulation pressure keeping, two is mute
The encapsulated layer of bell head is molded completion simultaneously；
（8）Die sinking, caster is retreated, and is separated with male template, is moved on top board, ejects dumbbell；
（9）Overlap, the burr of encapsulated layer are pruned, releasing agent, spot on the outside of encapsulated layer is wiped；
（10）Dumbbell finished product packing, storage.
Above-mentioned technical proposal of the invention has the beneficial effect that：The present invention is molded simultaneously using injection machine and injection mold
Encapsulated layer on the outside of two dumbbell heads of dumbbell, molding procedure is few, speed of production block, and injection molding material is not wasted, cost-effective；Note
The encapsulated layer smooth outer surface of type is moulded, parting line is few, health is durable, environmental protection, long service life.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention one；
Fig. 2 is the front view of embodiment one；
Fig. 3 is the sectional view of the embodiment of the present invention two；
The structural representation that Fig. 4 is placed in the die cavity of embodiment two for dumbbell；
Fig. 5 is the structural representation of male template in embodiment two；
Fig. 6 is the structural representation one of caster in embodiment two；
Fig. 7 is the structural representation two of caster in embodiment two；
Fig. 8 is the structural representation of top board in embodiment two;
Fig. 9 is the structure decomposition figure for the encapsulated heat pressing and molding mold of dumbbell head in background of invention；
Figure 10 is the structural representation for the encapsulated existing a kind of injection mold of dumbbell head in background of invention；
Figure 11 is the structural representation for the encapsulated existing another injection mold of dumbbell head in background of invention.
Description of reference numerals：
1st, dumbbell bar；2nd, dumbbell head；3rd, encapsulated layer；300th, parting line；301st, cast gate print；4th, bottom plate；400th, hole is ejected；5、
Bottom needle plate；6th, face needle plate；7th, top board；700th, the left conical surface；701st, the right conical surface；702nd, central column face；8th, supporting plate；9th, gap is ejected；10、
Male template；11st, caster；1100th, upper running channel；1101st, sprue；12nd, die cavity；1200th, left dumbbell head die cavity；1201st, it is right mute
Bell head dummy chamber；1202nd, dumbbell bar die cavity；1203rd, down sprue；13rd, stripper plate；14th, upper mounted plate；15th, mouth of a river set；16th, magnetic
Property block.
Specific embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
Embodiment 1：As shown in Figure 1 and Figure 2, a kind of dumbbell, including dumbbell bar 1, the dumbbell head for being fixed on the two ends of dumbbell bar 1
2 and the encapsulated layer 3 in the outside of dumbbell head 2 is coated on, two sections are provided with the neighbouring dumbbell head 2 of the dumbbell bar 1 with miner diameter end phase
The round platform section for connecing, the dumbbell head 2 is first-class hexagonal bell head, square bell head, cylindrical bell, preferably hexagonal bell head.It is described encapsulated
The material selection TPU of layer 3.
Anti-slip veins can be provided with the interlude of the dumbbell bar 1.
Dumbbell head 2 described in two is wrapped in respective encapsulated layer 3 with being once molded entirely by injection machine and injection mold.Bag
After the completion of glue, only one encloses the parting line 300 with the axis co-planar of dumbbell bar 1 on the encapsulated layer 3.
The end face towards dumbbell bar 1 of the encapsulated layer 3 is provided with cast gate print 301.
Embodiment 2：As shown in figure 3, the dumbbell head encapsulation die of dumbbell described in a kind of embodiment 1, is injection mold, bag
Include：
Bottom plate 4, which is provided with ejection hole 400.
Bottom needle plate 5, is stacked at the top of the bottom plate 4.
Face needle plate 6, is stacked at the top of the bottom needle plate 5 and connection fixed thereto.
Top board 7, is fixed on the top of the face needle plate 6, and its structure is as shown in Figure 8.
Supporting plate 8, located at the top of the face needle plate 6, and is provided with ejection gap 9 between the face needle plate 6.
Male template 10, is stacked at the top of the supporting plate 8 and connection fixed thereto, and its structure is as shown in Figure 5.
Caster 11, the detachable top for being connected to male template 10, its structure is as shown in Figure 6.
The junction of the caster 11 and male template 10 is provided with the die cavity 12 with dumbbell form fit, the quilt of the die cavity 12
Plane where the axis of dumbbell bar 1 is divided into two, respectively the male model die cavity in male template 10 and on caster 11
Master mold die cavity, the die cavity 12 includes left dumbbell head die cavity 1200, right dumbbell head die cavity 1201 and connects left dumbbell head dummy
Chamber 1200 and the dumbbell bar die cavity 1202 of right dumbbell head die cavity 1201.
As shown in Figure 6, Figure 7, the upper surface of the caster 11 is provided with vertical relative to the axial space of dumbbell bar 1 and pours
Road 1100, is provided with two down sprues 1203 relative to the diameter parallel of dumbbell bar 1 at the die joint of the die cavity 12（Poured under every
Road is divided into two parts by die joint, is opened in male template and caster respectively）, and two down sprues 1203 be placed in it is mute
The both sides of bell bar 1, the two ends of the upper running channel 1100 are connected by sprue 1101 with two down sprues 1203 respectively, Mei Yisuo
The two ends for stating down sprue 1203 connect 1201 with left dumbbell head die cavity 1200 and right dumbbell head die cavity respectively.The top board 7 runs through
Supporting plate 8 and male template 10 are extended at dumbbell bar die cavity 1202, and the top board 7 is slided relative to supporting plate 8 and male template 10 and set,
The die cavity concave surface that the upper end of the top board 7 is constituted after being combined with dumbbell bar die cavity 1202 is brought into close contact with the outer cylinder of dumbbell bar 1,
It is preferably formed with the contact of a small amount of.
Stripper plate 13, is stacked at the top of caster 11 and connection fixed thereto.
Upper mounted plate 14, is stacked at the top of stripper plate 13 and connection fixed thereto, and fixed plate 14 is provided with
Through the mouth of a river that stripper plate 13 is connected with upper running channel 1300, mouth of a river set 15 is embedded with the mouth of a river.
The situation of injection leakage iron is caused to occur to avoid dumbbell from being rotated in die cavity, the upper end of the top board 7 can tear open
The formula of unloading is embedded with magnetic block 16.The electromagnet of the magnetic block 16, it is also possible to be arranged at the other surfaces of dumbbell bar die cavity 1202,
As long as dumbbell can be adsorbed, it is set to be rotated in die cavity, the dumbbell particularly with weight more than 25 pounds carries out encapsulated
When, prevent it from rotating using electromagnetic block.
As shown in figure 4, the outer cylinder of the dumbbell bar 1 is followed successively by the left face of cylinder, left outside round table surface, left inside circle from left to right
Table top, the middle face of cylinder, it is right in round table surface, right outer round table surface and right column surface, the left outside round table surface and left inside round table surface it is small
Footpath end connects, and the miner diameter end of the right interior round table surface and right outer round table surface connects, the left face of cylinder, the middle face of cylinder and right cylinder
The external diameter in face is identical, and the dumbbell bar die cavity 1202 includes the left side coordinated with left face of cylinder zero clearance for setting gradually from left to right
Post chamber（Optimal is have a small amount of pressure between the two）The left cone chamber coordinated with left outside round table surface zero clearance（That optimal is both
Between have a small amount of pressure）The center pillar chamber coordinated with middle face of cylinder zero clearance（Optimal is have a small amount of pressure between the two）With the right side
The right cone chamber that outer round table surface zero clearance coordinates（Optimal is have a small amount of pressure between the two）And match somebody with somebody with right column surface zero clearance
The right post chamber closed（Optimal is have a small amount of pressure between the two）.
The left end of the upper surface of the top board 7 is the left conical surface 700 coordinated with left outside round table surface zero clearance, and right-hand member is and the right side
The right conical surface 701 that outer round table surface zero clearance coordinates, be between the left conical surface 700 and the right conical surface 701 and middle face of cylinder zero clearance
The central column face 702 of cooperation.
Embodiment 3：The present invention also provides the moulding process of dumbbell described in a kind of embodiment 1, comprises the following steps：
（1）Dumbbell bar and dumbbell head are processed respectively, it is desirable to which the surface roughness of dumbbell bar is not more than 0.8, then in dumbbell bar
Grip part annular knurl, forms anti-slip veins；
Wherein, the surface roughness of dumbbell bar will be controlled within Ra=0.8.
（2）Two dumbbell heads are respectively welded at the two ends of dumbbell bar, the dumbbell body of formula structure is integrally formed；
（3）Manufacture dumbbell head encapsulation die, including bottom plate, bottom needle plate, face needle plate, top board, supporting plate, male template, caster,
Stripper plate and upper mounted plate, wherein, the die cavity in male template and caster is molded by laser cutting, then will with copper billet electrode
Not round and smooth die cavity seamed edge after laser cutting polishes round and smooth, and each parts finally are assembled together as into two template die injection moulds
Tool；
Wherein, the surface roughness of dumbbell bar die cavity will be also controlled within Ra=0.8, it is ensured that in injection moulding process, dumbbell bar with
Close-fitting between dumbbell bar die cavity, dumbbell bar will not be rotated, and can not weigh dumbbell bar wounded again.
If there are the printed words such as trade mark, weight mark in encapsulated layer outside, can be same when male model die cavity or master mold die cavity is molded
When process corresponding die cavity, accomplish single injection-molded.
（4）After being well mixed in mixer with 100 parts of TPU particles, 0 ~ 30 part of feed back, 0 ~ 8 part of color masterbatch, dryer is put into
Dried, be subsequently placed in stand-by in the barrel of injection machine；Can also by compound 150 DEG C ~ 200 DEG C be heated up to molten condition
Injection grade TPU slurries, are subsequently placed in stand-by in the barrel of injection machine.
（5）By step（3）Injection mold be attached on injection machine, under injection mold die opening state, by step（2）'s
Dumbbell body is put to the die cavity of male template, is ajusted, it is ensured that each face of dumbbell head and the corresponding interior table of dumbbell head die cavity
Face is parallel, and each seamed edge of dumbbell head is in the same plane with corresponding each seamed edge of dumbbell head die cavity；
（6）Start injection machine, matched moulds, locked mode；
（7）TPU slurries are flowed into left dumbbell head die cavity and right dumbbell head die cavity through the mouth of a river, upper running channel, sprue and down sprue, note
Blow pressure 80MPa, 200 DEG C of injection temperature, heat-insulation pressure keeping 3min, the encapsulated layer of two dumbbell heads is molded completion simultaneously；
（8）Die sinking, caster is retreated, and is separated with male template, is moved on top board, ejects dumbbell；
（9）Overlap, the burr of encapsulated layer are pruned, releasing agent, spot on the outside of encapsulated layer is wiped；
（10）Dumbbell finished product packing, storage.
Because the encapsulated layer for not yet occurring hexagonal dumbbell in the market is not had at present using TPU materials, and numerous producers yet
The encapsulated technology of injection is carried out to hexagonal dumbbell head using TPU materials, therefore, using TPU materials as the six of encapsulated layer material
Angle dumbbell belongs in protection scope of the present invention.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
Should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of dumbbell, including dumbbell bar, the dumbbell head for being fixed on dumbbell bar two ends and it is coated on encapsulated on the outside of dumbbell head
Layer, it is characterised in that dumbbell head described in two is wrapped in respective encapsulated layer with being once molded entirely by injection machine and injection mold
It is interior.
2. dumbbell according to claim 1, it is characterised in that the end face towards dumbbell bar of the encapsulated layer is provided with and pours
Mouth print.
3. dumbbell according to claim 1 and 2, it is characterised in that the axle of an only circle and dumbbell bar on the encapsulated layer
The coplanar parting line of line.
4. dumbbell according to claim 1, it is characterised in that two sections are provided with the neighbouring dumbbell head of the dumbbell bar with small
The round platform section that footpath end connects.
5. the dumbbell according to claim 1 or 4, it is characterised in that the interlude of the dumbbell bar is provided with anti-slip veins.
6. a kind of dumbbell, including dumbbell bar, the dumbbell head for being fixed on dumbbell bar two ends and it is coated on encapsulated on the outside of dumbbell head
Layer, it is characterised in that the dumbbell head is hexagonal bell head, and the material of the encapsulated layer is TPU.
7. a kind of dumbbell head encapsulation die of the dumbbell as any one of claim 1 ~ 6, it is characterised in that it is injection mould
Tool, including：
Bottom plate, which is provided with ejection hole；
Bottom needle plate, is stacked at the top of the bottom plate；
Face needle plate, is stacked at the top of the bottom needle plate and connection fixed thereto；
Top board, is fixed on the top of the face needle plate；
Supporting plate, located at the top of the face needle plate, and is provided with ejection gap between the face needle plate；
Male template, is stacked at the top of the supporting plate and connection fixed thereto；
The junction of caster, the detachable top for being connected to male template, the caster and male template be provided with outside dumbbell
The die cavity of shape matching, the die cavity includes that left dumbbell head die cavity, right dumbbell head die cavity and the left dumbbell head die cavity of connection and the right side are mute
The dumbbell bar die cavity in bell head dummy chamber, the upper surface of the caster is provided with the upper running channel vertical relative to dumbbell bar axial space,
Two down sprues relative to dumbbell bar diameter parallel are provided with the die joint of the die cavity, and two down sprues are placed in
The both sides of dumbbell bar, the two ends of the upper running channel are connected by sprue with two down sprues respectively, each down sprue
Two ends connect with left dumbbell head die cavity and right dumbbell head die cavity respectively；The top board extends dumbbell rod-type through supporting plate and male template
At chamber, and the top board is slided relative to supporting plate and male template and set, and the upper end of the top board is combined rear structure with dumbbell bar die cavity
Into die cavity concave surface be brought into close contact with the outer cylinder of dumbbell bar；
Stripper plate, is stacked at the top of caster and connection fixed thereto；
Upper mounted plate, is stacked at the top of stripper plate and connection fixed thereto, and fixed plate is provided with and is pushed away through the mouth of a river
The mouth of a river that plate is connected with upper running channel, is embedded with mouth of a river set in the mouth of a river.
8. dumbbell head encapsulation die according to claim 7, it is characterised in that the detachable setting-in in upper end of the top board
Be magnetic block.
9. dumbbell head encapsulation die according to claim 7, it is characterised in that the outer cylinder of the dumbbell bar is from left to right
It is followed successively by the left face of cylinder, left outside round table surface, left inside round table surface, the middle face of cylinder, right interior round table surface, right outer round table surface and right cylinder
The miner diameter end of face, the left outside round table surface and left inside round table surface connects, the miner diameter end of the right interior round table surface and right outer round table surface
Connect, the left face of cylinder, the middle face of cylinder are identical with the external diameter of right column surface, the dumbbell bar die cavity is included from left to right successively
Left cone chamber and the middle face of cylinder that the left post chamber coordinated with left face of cylinder zero clearance for setting and left outside round table surface zero clearance coordinate
Right cone chamber that the center pillar chamber and right outer round table surface zero clearance that zero clearance coordinates coordinate and with the cooperation of right column surface zero clearance
Right post chamber；
The left end of the upper surface of the top board is the left conical surface coordinated with left outside round table surface zero clearance, and right-hand member is and round table surface outside the right side
The right conical surface that zero clearance coordinates, is the central column face coordinated with middle face of cylinder zero clearance between the left conical surface and the right conical surface.
10. the moulding process of a kind of dumbbell as any one of claim 1 ~ 6, it is characterised in that comprise the following steps：
（1）Dumbbell bar and dumbbell head are processed respectively, and in the grip part annular knurl of dumbbell bar, form anti-slip veins；
（2）Two dumbbell heads are respectively welded at the two ends of dumbbell bar, the dumbbell body of formula structure is integrally formed；
（3）Manufacture dumbbell head encapsulation die, including bottom plate, bottom needle plate, face needle plate, top board, supporting plate, male template, caster,
Stripper plate and upper mounted plate, wherein, the die cavity in male template and caster is molded by laser cutting, then will with copper billet electrode
Not round and smooth die cavity seamed edge after laser cutting polishes round and smooth, and each parts finally are assembled together as into two template die injection moulds
Tool；
（4）After being well mixed in mixer with 100 parts of TPU particles, 0 ~ 30 part of feed back, 0 ~ 8 part of color masterbatch, being put into dryer is carried out
Drying, is subsequently placed in stand-by in the barrel of injection machine；
（5）By step（3）Injection mold be attached on injection machine, under injection mold die opening state, by step（2）Dumbbell
Body is put to the die cavity of male template, is ajusted, it is ensured that put down with the corresponding inner surface of dumbbell head die cavity in each face of dumbbell head
OK, each seamed edge of dumbbell head and corresponding each seamed edge of dumbbell head die cavity are in the same plane；
（6）Start injection machine, matched moulds, locked mode；
（7）The TPU slurries being thermally formed via injection machine flow into left dumbbell head dummy through the mouth of a river, upper running channel, sprue and down sprue
In chamber and right dumbbell head die cavity, 30 ~ 110MPa of injection pressure, 180 DEG C ~ 240 DEG C of injection temperature, 2 ~ 5min of heat-insulation pressure keeping, two is mute
The encapsulated layer of bell head is molded completion simultaneously；
（8）Die sinking, caster is retreated, and is separated with male template, is moved on top board, ejects dumbbell；
（9）Overlap, the burr of encapsulated layer are pruned, releasing agent, spot on the outside of encapsulated layer is wiped；
（10）Dumbbell finished product packing, storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611183754.0A CN106693277A (en) | 2016-12-20 | 2016-12-20 | Dumbbell, dumbbell head rubber-covering mold and dumbbell forming technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611183754.0A CN106693277A (en) | 2016-12-20 | 2016-12-20 | Dumbbell, dumbbell head rubber-covering mold and dumbbell forming technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106693277A true CN106693277A (en) | 2017-05-24 |
Family
ID=58939339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611183754.0A Pending CN106693277A (en) | 2016-12-20 | 2016-12-20 | Dumbbell, dumbbell head rubber-covering mold and dumbbell forming technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106693277A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108159637A (en) * | 2018-01-09 | 2018-06-15 | 成都黑贝智能科技有限公司 | Using the dumbbell of photoelectric technology |
| CN111590813A (en) * | 2020-05-18 | 2020-08-28 | 青岛健动体育用品有限公司 | Barbell plastic coating method and device |
| CN113813549A (en) * | 2021-09-29 | 2021-12-21 | 南通骐骏机械有限公司 | Environment-friendly soft dumbbell |
| CN114030110A (en) * | 2021-09-23 | 2022-02-11 | 甘肃旭晶新材料有限公司 | Method for eliminating corner stress concentration of megawatt wind power generation blade and blade |
| CN114129957A (en) * | 2021-10-18 | 2022-03-04 | 南通恒力体育用品有限公司 | Dumbbell, dumbbell injection mold and production process |
| CN115042377A (en) * | 2022-07-25 | 2022-09-13 | 定州市南源鞋业有限公司 | Manufacturing process of circular dumbbell |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200515989A (en) * | 2003-11-14 | 2005-05-16 | Young Way Tech Corp | Forming mold for complete plastic wrapping at a time |
| CN202186015U (en) * | 2011-06-28 | 2012-04-11 | 福建省石狮市通达电器有限公司 | Injection mould with high production efficiency |
| CN103585739A (en) * | 2013-10-25 | 2014-02-19 | 南通宝鹏健身器材科技有限公司 | Dumbbell, rubber coating machine for dumbbell and dumbbell production process |
| CN103963216A (en) * | 2014-04-15 | 2014-08-06 | 太仓顺达磁力泵科技有限公司 | Manufacturing method of totally coated anti-corrosion magnetic force pump internal magnet rotor, and die and internal magnet rotor |
| CN104129045A (en) * | 2014-07-28 | 2014-11-05 | 南通宝鹏健身器材科技有限公司 | Injection mold for dumbbell and dumbbell molding technology |
| CN105216219A (en) * | 2015-06-30 | 2016-01-06 | 北京市塑料研究所 | A kind of single injection-molded method of full coating plastic goods |
-
2016
- 2016-12-20 CN CN201611183754.0A patent/CN106693277A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200515989A (en) * | 2003-11-14 | 2005-05-16 | Young Way Tech Corp | Forming mold for complete plastic wrapping at a time |
| CN202186015U (en) * | 2011-06-28 | 2012-04-11 | 福建省石狮市通达电器有限公司 | Injection mould with high production efficiency |
| CN103585739A (en) * | 2013-10-25 | 2014-02-19 | 南通宝鹏健身器材科技有限公司 | Dumbbell, rubber coating machine for dumbbell and dumbbell production process |
| CN103963216A (en) * | 2014-04-15 | 2014-08-06 | 太仓顺达磁力泵科技有限公司 | Manufacturing method of totally coated anti-corrosion magnetic force pump internal magnet rotor, and die and internal magnet rotor |
| CN104129045A (en) * | 2014-07-28 | 2014-11-05 | 南通宝鹏健身器材科技有限公司 | Injection mold for dumbbell and dumbbell molding technology |
| CN105216219A (en) * | 2015-06-30 | 2016-01-06 | 北京市塑料研究所 | A kind of single injection-molded method of full coating plastic goods |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108159637A (en) * | 2018-01-09 | 2018-06-15 | 成都黑贝智能科技有限公司 | Using the dumbbell of photoelectric technology |
| CN108159637B (en) * | 2018-01-09 | 2023-09-26 | 成都黑贝智能科技有限公司 | Dumbbell adopting photoelectric technology |
| CN111590813A (en) * | 2020-05-18 | 2020-08-28 | 青岛健动体育用品有限公司 | Barbell plastic coating method and device |
| CN111590813B (en) * | 2020-05-18 | 2022-02-08 | 青岛健动体育用品有限公司 | Barbell plastic coating method and device |
| CN114030110A (en) * | 2021-09-23 | 2022-02-11 | 甘肃旭晶新材料有限公司 | Method for eliminating corner stress concentration of megawatt wind power generation blade and blade |
| CN113813549A (en) * | 2021-09-29 | 2021-12-21 | 南通骐骏机械有限公司 | Environment-friendly soft dumbbell |
| CN114129957A (en) * | 2021-10-18 | 2022-03-04 | 南通恒力体育用品有限公司 | Dumbbell, dumbbell injection mold and production process |
| CN114129957B (en) * | 2021-10-18 | 2022-09-09 | 南通恒力体育用品有限公司 | Dumbbell, dumbbell injection mold and production process |
| CN115042377A (en) * | 2022-07-25 | 2022-09-13 | 定州市南源鞋业有限公司 | Manufacturing process of circular dumbbell |
| CN115042377B (en) * | 2022-07-25 | 2023-09-19 | 定州市南源鞋业有限公司 | Circular dumbbell manufacturing process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106693277A (en) | Dumbbell, dumbbell head rubber-covering mold and dumbbell forming technique | |
| US6319451B1 (en) | Method of molding a layer around a body | |
| CN103716665B (en) | Set-top box and preparation method thereof | |
| CN107465794B (en) | Anti-falling mobile phone protection shell and processing method thereof | |
| CN101837622A (en) | Injection moulding device and injection moulding method and prepared circular ring plastic product | |
| CN107379424A (en) | A kind of mould and forming method of notebook face-piece | |
| CN206777678U (en) | The dumbbell head encapsulation die of dumbbell | |
| CN201511498U (en) | Plastic die large-span hidden type gate | |
| CN205969786U (en) | Pencil sharpener casing injection mold | |
| CN206263241U (en) | Lockset ox horn die casting | |
| CN207954541U (en) | A kind of injection mold that can accelerate injecting products cooling and demolding | |
| CN103552200B (en) | Automobile EPP (foamed polypropylene) steering wheel mould and automobile steering wheel | |
| CN102908747B (en) | Plastic kettle dumbbell and preparation method thereof | |
| CN207859357U (en) | A kind of injection molding die with in-mould transfer | |
| CN207841937U (en) | A kind of sulphur hexafluoride shell mold | |
| CN207077696U (en) | A kind of good plastic mould of steering capability | |
| CN207825372U (en) | A kind of two-in-one router cover injection mold | |
| CN206605735U (en) | The mould glue-feeder of improvement | |
| CN207222859U (en) | A kind of core box for manufacturing transmission end cap core mold | |
| CN205705030U (en) | Bulk plastic box handle injection mould | |
| CN206367155U (en) | Inject mould in a kind of tool box | |
| CN201913734U (en) | Die with ejection mechanism | |
| JP3311685B2 (en) | Molding method and molding die for hollow product | |
| CN203957300U (en) | Dumbbell injection mold | |
| CN207594231U (en) | A kind of mold for being used to produce automobile hand brake top bottom cover |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170524 |
|
| WD01 | Invention patent application deemed withdrawn after publication |