CN106426792A

CN106426792A - Mould for chair leg

Info

Publication number: CN106426792A
Application number: CN201611174138.9A
Authority: CN
Inventors: 缪杰
Original assignee: Taizhou Plain Huangyan Ji Jia Mould Co Ltd
Current assignee: Taizhou Plain Huangyan Ji Jia Mould Co Ltd
Priority date: 2016-12-16
Filing date: 2016-12-16
Publication date: 2017-02-22

Abstract

The invention discloses a mould for a chair leg. The mould comprises an upper mould, a lower mould and a mold cavity which is arranged between the upper mould and the lower mould and is used for molding the chair leg, wherein a plastic injecting hole used for injecting plastic into the mold cavity is formed in the lower mould; the upper mould is provided with a blowing nozzle used for blowing air into the mold cavity, and one end of the blowing nozzle is positioned in the middle of the mold cavity; a containing cavity used for containing the excessive plastic is formed in the lower mould; a diversion trench, through which the plastic in the mold cavity can enter the containing cavity, is formed between the containing cavity and the mold cavity; a material blocking mechanism used for cutting off the diversion trench is arranged on the lower mould. The key points of the technical scheme are as follows: by blowing the plastic in the middle of the mold cavity into the containing cavity through the diversion trench during the injection molding of the mould, the molded chair leg can be made into a hollow chair leg with less weight while the strength of the chair leg meets the requirement; meanwhile, the material blocking mechanism can be used for cutting off the diversion trench, so that the plastic is prevented from directly flowing into the containing cavity from the mold cavity during molding, and less material is consumed.

Description

Chair leg mould

Technical field

The present invention relates to injection mold, more particularly to a kind of chair leg mould.

Background technology

Plastic chair is typically all, the low cost fast with process velocity by mould of plastics single injection-molded, can return The features such as receipts, there is a kind of chair leg mould, including upper die and lower die, the type that is provided between upper mould and lower mould for being molded chair leg 11 Chamber, the structure chart of chair leg 11 is as shown in Figure 10, is provided with for the runner toward injected plastic in die cavity, during use on lower mould, Injection machine fills the plastics of molten condition in die cavity by runner, and after waiting cooling shaping, upper mould is separated with lower mould so that Chair leg 11 in die cavity out, completes injection.

But, the plastic chair leg for so producing is solid construction and intensity surplus, heavier when using, while Produce the material for expending during this plastic chair leg also relatively more.

Content of the invention

In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of chair leg mould, the mould is produced Chair leg be hollow-core construction, it is ensured that save materials'use amount on the premise of intensity requirement, at the same cause chair leg lighter in weight.

The above-mentioned technical purpose of the present invention technical scheme is that：A kind of chair leg mould, including upper Mould and lower mould and the die cavity being disposed there between for being molded chair leg, are provided with the lower mould for injecting in die cavity The injection hole of plastics, the upper mould is provided with the blowing nozzle for blowing in die cavity, and described blowing nozzle one end is located in die cavity Portion, the accommodating chamber being provided with the lower mould for accommodating unnecessary plastics, it is provided between the accommodating chamber and die cavity and supplies type The guiding gutter that plastics in chamber are entered in accommodating chamber, is provided with, on the lower mould, the stock stop for blocking guiding gutter.

By technique scheme, during use, first pass through stock stop and guiding gutter is blocked, afterwards by injection machine from note Plastics are injected by modeling mouth, and plastics will be filled with whole die cavity, as guiding gutter is blocked by stock stop, so in injected plastic, Plastics will not be entered in accommodating chamber from guiding gutter, after waiting certain time to be cooled, as the temperature on cavity wall is relatively low, so The plastics being affixed with cavity wall will be by cooling solidification, and the plastics temperature in the middle part of die cavity is higher therefore also in molten condition, At this moment by stock stop, guiding gutter is opened, is then blown in die cavity by blowing nozzle, as blowing nozzle is located in die cavity Portion, and middle part plastics do not solidify, so not solidified plastics will be blown out by guiding gutter entrance appearance from guiding gutter when blowing Receive in chamber, will be blown in the middle part of die cavity afterwards place one hollow space, as air pressure is larger, thus larger air pressure will cause hollow Space size is uniform, produces the uniform wall thickness of hollow chair leg, and the good mechanical properties of each several part can meet and use need Ask, while chair leg is lightweight, the plastics in accommodating chamber can be continuing with after melting, raw material is saved, works as accommodating chamber After filling, need to block guiding gutter by stock stop, the plastics being at this moment located in guiding gutter will be cut off by stock stop, be made Plastics in accommodating chamber and plastics in die cavity separate, cooling shaping afterwards, after molding, blowing nozzle stops air blowing, laggard The row demoulding；After chair leg cooling shaping, upper mould is separated with lower mould, and the chair leg of molding all rests on lower mould with waste material in accommodating chamber On, then the chair leg of molding and waste material are all taken out, just can be processed with matched moulds next time afterwards, simple to operation；Produce After pint mould, the waste material in accommodating chamber is to separate with product, does not therefore need later stage cutting off processing, while it also avoid de- As waste material is not separated with product during mould, and waste material is larger, and waste material can be caused to fracture under the weight of waste material itself with product, Easily breach being formed in product surface when fractureing, has a strong impact on product quality.

Preferably, the stock stop includes to be arranged on the chute of water conservancy diversion trench bottom, is provided with inserted sheet, institute in the chute Width of the inserted sheet width not less than guiding gutter is stated, the inserted sheet is connected with the cylinder for driving inserted sheet to slide in chute, institute State cylinder to be fixed on lower mould.

By technique scheme, when blocking or turning on guiding gutter, inserted sheet will be slided in chute, and chute is joined with inserted sheet Inserted sheet working stability when sliding is closed, will not be stuck at work, while inserted sheet passes through air cylinder driven, work limitation rate is high, in order to In use that guiding gutter is completely cut off so that the width of inserted sheet is more than the width of guiding gutter, and such inserted sheet can be water conservancy diversion Groove is completely cut off so that the waste material in the later stage demoulding in accommodating chamber is to separate with the product of molding, is convenient in demoulding, product table Face is smooth, it is not necessary to later stage polishing processing, production efficiency height.

Preferably, the accommodating chamber bottom is provided with sliding chamber, is provided with the waste material ejection in accommodating chamber in the sliding chamber Push rod.

By technique scheme, upper mould and lower mould or so placement when mould is used, therefore after the demoulding, by sliding chamber By the waste material top in accommodating chamber once, waste material from accommodating chamber out, and will fall down push rod under gravity naturally, return afterwards Receipts are continuing with, simple to operation, quick during the demoulding, it is not necessary to manually pick up, and use manpower and material resources sparingly.

Preferably, the guiding gutter includes the appearance material section of the material leakage section near cavity side and close accommodating chamber, the appearance material The area of the longitudinal section of section is more than the area of the longitudinal section of material leakage section.

By technique scheme, as, before blowing in die cavity, the temperature of the product surface in die cavity is relatively low, surface Hardness increases, and the plastics of interiors of products are also in molten condition, when blowing in die cavity, the product ground relative with guiding gutter The surface of side will be torn, and at this moment, the plastics in the middle part of product will be passed through from guiding gutter by this tearing port, at this moment, If the opening of material leakage section is larger, product surface can be caused to form larger tearing part, during later stage cooling, tearing part can be new Filling plastic, but this can cause tearing part and the cool time on the surface of other parts produce difference, and in cooling Can produce that chilling temperature is poor, so intensity difference will be produced with light between the product surface of the product surface of tearing part and other parts Cleanliness difference, has a strong impact on product quality, by causing the sectional area of material leakage section less than the sectional area for holding material section, can cause material leakage The opening of section is less, and the tearing part for so producing in product surface is less, the impact very little to product surface fineness and intensity, So that product meets use demand, and, the section for holding material section is larger with respect to material leakage section, so enter by material leakage section holding material Plastics in section will be easy to by and enter in accommodating chamber, it is to avoid because material leakage Duan Yurong material section quickly cannot be led to compared with hour plastics Cross, and then the situation that plastics cooling cannot be continued through is produced.

Preferably, the material leakage section is gradually reduced from close cavity side to the area of the longitudinal section near accommodating chamber side.

By technique scheme, in order that the plastics in die cavity are rapidly entered in accommodating chamber so that material leakage Duan Chengkuo Mouth is arranged, and material leakage section is larger towards the area of section at the opening of cavity side, and the plastics that conveniently can melt pour in material leakage section simultaneously Enter and hold material section.

Preferably, the chute is arranged on the bottom of material leakage section and arranges near die cavity.

By technique scheme, can slide during use in chute setting inserted sheet, block material leakage section by inserted sheet, make Material leakage section near cavity side the injection of plastics and product together with, near accommodating chamber side plastics together with waste material injection, So that the projection for being formed in material leakage section on product, is arranged near die cavity by causing chute, the distance between such die cavity and inserted sheet Less so that little in the projection of material leakage section formation on product.

Preferably, the accommodating chamber is arranged in enlarging.

By technique scheme, the waste material during demoulding in accommodating chamber needs to deviate from from accommodating chamber, for convenience waste material Abjection so that accommodating chamber is arranged in enlarging, the opening of such accommodating chamber is larger, will not block during the demoulding, and the demoulding is simple and convenient.

Preferably, the die cavity is the middle section position of the die cavity that " several " font, the blowing nozzle is located at " several " font.

By technique scheme, in order that the cavity for being formed in the middle part of product is uniform, blowing nozzle is arranged on die cavity Most middle part, the power of the gas that the plastics for melting in die cavity when blowing so in die cavity are subject to is uniform, can just cause type Plastics in chamber are all entered in accommodating chamber.

Preferably, the accommodating chamber quantity is two, and respectively positioned at the both ends of the die cavity of " several " font.

By technique scheme, when blowing nozzle is blown in die cavity, the plastics in die cavity will be in two accommodating chambers Motion, and accommodating chamber is full of, and blowing nozzle is located at the stage casing of " several " font, so when blowing, the two ends of die cavity are subject to Power is uniform, and the plastics in such die cavity uniformly will be moved in two accommodating chambers, so be less prone to product one end relatively thin The thicker situation in end, product quality height.

In sum, the present invention having the beneficial effect that in contrast to prior art：By arranging accommodating chamber on lower mould, permissible Injection when in die cavity blow, the partly plastic in die cavity is discharged to accommodating chamber, make injection product out be hollow, this The weight that sample product mitigates on the premise of use requirement is met, reduces raw material usage amount, while the waste material in accommodating chamber is again Use can be reclaimed, has saved cost.

Description of the drawings

Fig. 1 is the explosive view of the chair leg with lower mould of the injection formed of embodiment；

Fig. 2 is the structural representation of embodiment；

Fig. 3 is the structural representation of the lower mould of embodiment, main prominent position of the accommodating chamber on lower mould；

Structural representation when guiding gutter is blocked by Fig. 4 for the inserted sheet of embodiment；

Fig. 5 is the front view of embodiment；

Fig. 6 is the sectional view of C-C in Fig. 5, main prominent position of the cylinder with inserted sheet in lower mould；

Fig. 7 is the zoomed-in view in Fig. 3 at A, structural representation when guiding gutter is not blocked by main prominent inserted sheet；

Fig. 8 is the zoomed-in view in Fig. 4 at B, structural representation when guiding gutter is blocked by main prominent inserted sheet；

Fig. 9 is the zoomed-in view in Fig. 6 at D；

Figure 10 is the structural representation of chair leg.

Reference：1st, upper mould；2nd, lower mould；3rd, injection hole；4th, blowing nozzle；5th, accommodating chamber；6th, guiding gutter；611st, hold material Section；612nd, material leakage section；7th, chute；8th, inserted sheet；9th, cylinder；10th, push rod；11st, chair leg.

Specific embodiment

Below in conjunction with accompanying drawing, the present invention is described in further detail.

This specific embodiment is only explanation of the invention, and which is not limitation of the present invention, people in the art Member can make the modification without creative contribution after this specification is read as needed to the present embodiment, but as long as at this All protected by Patent Law in the right of invention.

As shown in Figure 1, 2, a kind of chair leg mould, including upper mould 1 and lower mould 2, is provided with die cavity between upper mould 1 and lower mould 2, Die cavity be shaped as " several " font, be provided with injection hole 3 on lower mould 2, injection hole 3 and die cavity conducting, can pass through during use Injection hole 3 injects the plastics of melting in die cavity, and upper mould 1 is provided with blowing nozzle 4, and during use, blowing nozzle 4 is connected with source of the gas, is passed through Source of the gas is to the inner ventilation of blowing nozzle 4；As shown in figure 1, one end of blowing nozzle 4 is located at the middle part of die cavity longitudinal section, while as Fig. 3,4 institutes Show, valve is located at the middle section position of " several " font, is provided with accommodating chamber 5 on lower mould 2, by leading between accommodating chamber 5 and die cavity Chute 6 is turned on, and 5 quantity of accommodating chamber is to be located at the two ends of the die cavity of " several " font two, respectively, as shown in figure 9, in guiding gutter 6 In die cavity is provided with chute 7, sliding in chute 7 is provided with inserted sheet 8, the width of inserted sheet 8 more than the width of guiding gutter 6, Cylinder 9 is provided with lower mould 2, the piston rod of cylinder 9 is connected with 8 end of inserted sheet, cylinder 9 can drive inserted sheet 8 sliding from chute 7 Go out and guiding gutter 6 is blocked, it is also possible to drive inserted sheet 8 that the end of inserted sheet 8 is maintained an equal level with the bottom of guiding gutter 6, at this moment guiding gutter 6 Open.

As shown in Figure 7,8, accommodating chamber 5 is the groove of cuboid, arranges in enlarging, in accommodating chamber 5 at the opening of accommodating chamber 5 Fillet has all been led in each edges and corners in portion, and 5 bottom of accommodating chamber is provided with sliding chamber, is provided with push rod 10, pushes up during the demoulding in sliding chamber Bar 10 will move to outside sliding chamber and release the waste material in accommodating chamber 5 from accommodating chamber 5, when mould is in injection, the end of push rod 10 Portion is just maintained an equal level with the bottom surface of accommodating chamber 5.

Wherein, as shown in fig. 7, guiding gutter 6 includes the appearance material section of the material leakage section 612 near cavity side and close accommodating chamber 5 611, material leakage section 612 is gradually reduced from close cavity side to the longitudinal section area near 5 side of accommodating chamber so that material leakage section 612 Opening is larger, facilitates the plastics in die cavity by material leakage section 612；The area for holding material 611 longitudinal section of section is more than vertical section of material leakage section 612 The area in face, so design can also facilitate the plastics that plastics are entered from material leakage section 612 quickly to reach accommodating chamber 5；By chute 7 The bottom of material leakage section 612 is arranged on, such inserted sheet 8 will be closer to die cavity, while causing formation between product and guiding gutter 6 Raised less, product quality is more preferably.

During use, first upper mould 1 is fixed on injection machine with the closing of lower mould 2, injection machine will drive upper mould 1 and lower mould afterwards 2 is close to each other, and when upper mould 1 is 2-in-1 with lower mould, drive cylinder 9 promotes inserted sheet 8, as shown in Figure 8 so that inserted sheet 8 is by material leakage Section 612 is blocked, and occupies plastics by injection hole 3 afterwards, after waiting certain time to be cooled, with mold cavity surface and upper mould in die cavity 1 and the plastics cooling be close to of lower mould 2 quick, hardness is increased, exhaust hood 9 drive inserted sheet 8 to entering in chute 7, as Fig. 7 institute Show so that material leakage section 612 is opened, then blown in die cavity by blowing nozzle 4, at this moment, gas will by blowing nozzle 4 to Two end motion of die cavity of " several " font so that the plastics for melting in die cavity are gushed to die cavity two ends, are at this moment opened positioned at material leakage section 612 Mouthful to die cavity in the higher plastics of hardness will be torn so that in die cavity melt plastics will enter appearance from material leakage section 612 Expect section 611, stream enters accommodating chamber 5 afterwards, until accommodating chamber 5 is completely filled in, at this moment, inserted sheet 8 is driven by material leakage section by cylinder 9 612 block, as the plastics at this moment material leakage section 612 are softer, so can be easily by material leakage section 612 by inserted sheet 8 Plastics are divided into two parts, and a part is together with the plastic injection in die cavity, and another part is moulded in waste material in accommodating chamber 5 Together, a hollow housing can be formed in the middle part of die cavity afterwards, then proceedes to blow so that housing inflation is uniform to be cooled down, and keeps away When exempting from non-aerating, housing is deflated, stops ventilation after the completion of housing cooling.

When carrying out the demoulding, injection machine drives upper mould 1 to separate with lower mould 2, then passes through push rod 10 by the waste material in accommodating chamber 5 Ejection, as upper mould 1 is placed in left and right with lower mould 2, so waste material is dropped automatically, can just collect waste recovery afterwards makes With, then the chair leg 11 of injection formed is taken out from lower mould 2, at this moment can be in the place formation relative with material leakage section 612 of chair leg 11 one The projection of very little, can cause by polishing that product surface is smooth, and product is for hollow so weight is little, easy to use, and is molded When the raw material that expends less, save departmental cost, full-automatic operation in whole process, simple to operation, efficiency high.

The above is only the exemplary embodiment of the present invention, not for limiting the scope of the invention, the present invention's Protection domain is determined by appended claim.

Claims

1. a kind of chair leg mould, including upper mould (1) and lower mould (2) and the type being disposed there between for being molded chair leg (11) Chamber, the injection hole (3) being provided with lower mould (2) for injected plastic in die cavity, it is characterized in that：On upper mould (1) The blowing nozzle (4) being provided with for blowing in die cavity, blowing nozzle (4) one end is located in the middle part of die cavity, is set on lower mould (2) The accommodating chamber (5) being equipped with for accommodating unnecessary plastics, accommodating chamber (5) are provided with for the plastics in die cavity and die cavity between The guiding gutter (6) for entering in accommodating chamber (5), is provided with, on lower mould (2), the stock stop for blocking guiding gutter (6).

2. chair leg mould according to claim 1, is characterized in that：The stock stop includes to be arranged on guiding gutter (6) bottom The chute (7) in portion, is provided with inserted sheet (8) in chute (7), inserted sheet (8) width is not less than the width of guiding gutter (6), Inserted sheet (8) are connected with the cylinder (9) for driving inserted sheet (8) to slide in chute (7), and cylinder (9) are fixed on down On mould (2).

3. chair leg mould according to claim 1, is characterized in that：Accommodating chamber (5) bottom is provided with sliding chamber, the cunning It is provided with the push rod (10) of the waste material ejection in accommodating chamber (5) in chamber.

4. chair leg mould according to claim 2, is characterized in that：Guiding gutter (6) include the material leakage near cavity side Section (612) near accommodating chamber (5) appearance material section (611), described hold material section (611) longitudinal section area be more than material leakage section (612) area of longitudinal section.

5. chair leg mould according to claim 4, is characterized in that：Material leakage section (612) are near cavity side to close The area of the longitudinal section of accommodating chamber (5) side is gradually reduced.

6. chair leg mould according to claim 4, is characterized in that：Chute (7) are arranged on the bottom of material leakage section (612) And arrange near die cavity.

7. chair leg mould according to claim 1, is characterized in that：Described accommodating chamber (5) are arranged in enlarging.

8. chair leg mould according to claim 1, is characterized in that：The die cavity is " several " font, blowing nozzle (4) position Middle section position in the die cavity of " several " font.

9. chair leg mould according to claim 8, is characterized in that：Accommodating chamber (5) quantity is two, and is located at respectively The both ends of the die cavity of " several " font.