江蘇春晨電纜有限公司：http://www.cmr6829.com/st159127/

Mold design, mold design and mold design can be set, you can also design mold design mold. In order to verify the design of less times, the first general design of die design and die.

我們以65型擠出機(jī)機(jī)頭來舉例，已知機(jī)頭裝配尺寸，要求設(shè)計(jì)模芯、模套。

We have 65 type extruder head for example, known as the head assembly size, design requirements, die die sleeve.HR起重機(jī)手柄電纜

經(jīng)測繪，得65型擠出機(jī)模頭尺寸。

After surveying and mapping, have 65 type extruder die size.

1、先設(shè)計(jì)模套，根據(jù)模套拆裝要求，其伸出模頭的長度約10mm，則得到模套的總長10+20=30mm；

1, the first design of the module, according to the requirements of the module assembly, the length of the extension of the mold is about 10mm, then the total length of the module is 10+20=30mm;

2、確定模套內(nèi)錐zui大外徑=Φ25mm；HR起重機(jī)手柄電纜

2, determine the die casing diameter cone = phi 25mm;

3、根據(jù)要求，確定模套定徑區(qū)直徑ΦD；

3, according to the requirements, determine the die sizing area of diameter D;

4、取定徑區(qū)長度=0.5D；

4, the length of the area to take the length of =0.5D;

5、計(jì)算模套內(nèi)錐半角γ/2=ATAN（（25-D）/（2*（30-0.5D））*180/PI()；繪制模套的草圖（見圖10）；

5, the calculation in the die sleeve cone semiangle gamma (/2=ATAN (25-D) / (2* (30-0.5D)) (*180/PI); drawing die sketch (see Figure 10);

6、因采用擠壓式，模芯與模套的模間距L=2δ厚度；

6, because of the extrusion, the die core and the die sleeve die spacing L=2 8 thickness;

7、選模頭右邊平面為基準(zhǔn)面A，模芯口至基準(zhǔn)面A的距離=10-2δ厚度；

7, choose right die plane as the datum of A, distance =10-2 delta thickness core mouth to datum A;

8、為模芯拆卸方便以及模芯強(qiáng)度，選模芯伸出模頭左邊約10mm，則可以得到模芯總長=10+（10-2δ厚度）+65；

8, as the core and the core strength of convenient disassembly, selection of core die out of the left about 10mm, then we can get the core length =10+ (10-2 8 thickness) +65;

9、繪制模芯草圖（如圖）；

9, drawing sketches of core (Figure);

10、為便于調(diào)節(jié)偏芯，模芯螺紋長度一般取8～10mm，即b=8mm；

10, in order to adjust the eccentric core, core thread length is 8 ~ 10mm, b=8mm;

11、根據(jù)模頭尺寸結(jié)構(gòu)，取d4=18mm；

11, according to the size of the die structure, take d4=18mm;

12、根據(jù)第8條，我們知道模芯伸出模頭左側(cè)10mm，則a+b=27+10=37mm，a=37-b=37-8=31mm；

12, according to Article eighth, we know that the core extends out of the mold head on the left side 10mm, a+b=27+10=37mm, a=37-b=37-8=31mm;

13、為保證調(diào)偏螺釘能正面受力在模芯上，一般c取12～15mm，即c=15mm；

13, in order to ensure the adjusting screws can be positive force in the core, the general C from 12 to 15mm, c=15mm;

14、根據(jù)線芯大小，我們確定模芯定徑區(qū)直徑d1=d線芯+（0.2～0.5） mm，取d1=d線芯+0.2 mm，那么模芯外錐zui小外徑d2=d1+0.5*2=d線芯+1.2 mm；

14, according to the core size, we determine the core sizing area of d1=d diameter wire core + (0.2 ~ 0.5) mm, d1=d +0.2 mm core, then the core outer cone diameter d2=d1+0.5*2=d wire core +1.2 mm;

15、那么根據(jù)以上數(shù)據(jù)，我們可以得出模芯外錐部分的長度=L-a-b-c=10+（10-2δ厚度）+65-31-8-15=31-2δ厚度 mm；

15, then according to the data above, we can draw the core part of the outer cone length =L-a-b-c=10+ (10-2 Delta +65-31-8-15=31-2 delta mm thickness) thickness;

16、根據(jù)錐角計(jì)算公式，求的模芯外錐角β= ATAN（（18- d線芯+1.2）/（2*（31-2δ厚度））*180/PI()

16, according to the calculation formula of cone angle, cone angle and outer core (beta = ATAN (18- D core +1.2 (2*) / (31-2) *180/PI (delta thickness))

17、將計(jì)算出模芯的錐角β與計(jì)算的模套外錐角γ比較，看看其差值是不是符合我們設(shè)計(jì)要求，若在設(shè)計(jì)范圍內(nèi)，設(shè)計(jì)成功，繪制零件圖；若有出入，再次循環(huán)以上內(nèi)容，直至符合設(shè)計(jì)要求為止，但必須保證在滿足角度的前提下，還必須滿足裝配上的要求。

17, will be calculated through the core die cone angle calculated by the cone angle beta and gamma, see the difference is not consistent with our design requirements, if in the scope of design, design, drawing; if there is a discrepancy, again above, until it meets the design requirement, but must ensure that the premise meet the angle, must also meet the requirements of assembly.

以上，我們是用zui簡單的65型擠出機(jī)模具設(shè)計(jì)來舉的一個(gè)例子，實(shí)際中比以上設(shè)計(jì)要復(fù)雜多，但萬變不離其中，請大家在設(shè)計(jì)時(shí)，必須根據(jù)機(jī)頭的裝配圖及零件圖的尺寸來合理設(shè)計(jì)。具體步驟大致如下：

The above is an example, we design 65 type extruder die for the most simple and practical than the above design is more complex, but deviate from them, please in the design, according to the assembly drawing and parts drawing die size design. The specific steps are as follows:

1、根據(jù)機(jī)頭的零件圖設(shè)計(jì)模套：

1, according to the head of the parts drawing design:

1.1 先根據(jù)給定一個(gè)角度以及模套不要伸出機(jī)頭太長的原則，將模套的總長確定；

1.1 according to a given point of view as well as the die sets do not extend the principle of the head is too long, the length of the mold will be determined;

1.2 根據(jù)機(jī)頭零件圖，確定模套裝配尺寸，包括模套內(nèi)錐zui大外徑、模套外徑等尺寸；

1.2 according to the head parts drawing, determine the size of the die sleeve assembly, including the maximum diameter of the cone inside the mold, die sleeve diameter and other dimensions;

1.3 根據(jù)產(chǎn)品工藝要求，暫現(xiàn)確定模套孔徑及定徑區(qū)長度；

1.3 according to the technical requirements of the product, the length of the die sleeve diameter and the diameter of the die set is determined;

1.4 根據(jù)確定好的模套各數(shù)據(jù)，計(jì)算出模套的內(nèi)錐角。

1.4 calculate the inner cone angle of the die sleeve according to the data of the set of good modules.

2、根據(jù)機(jī)頭裝配圖、模芯座零件圖以及設(shè)計(jì)好的模套，來設(shè)計(jì)模芯：

2, according to the head assembly, a core part drawings and design model, to design the mould core:

2.1 首先確定擠出類型：擠壓式、擠管式、半擠管式，確定好模芯與模套的距離；

2.1 types: first determine the extrusion extrusion, tube extruding, semi tube extruding, determine the die core and the die sleeve distance;

2.2 在機(jī)頭裝配圖中，選擇一個(gè)基準(zhǔn)面，以基準(zhǔn)面來計(jì)算相關(guān)長度；

2.2 in the head assembly drawing, select a datum plane to calculate the correlation length;

2.3 得到模芯的長度后，根據(jù)模芯座的結(jié)構(gòu)尺寸確定模芯裝配尺寸；

2.3 get the core length, core assembly size is determined according to the structure size of the mold core seat;

2.4 根據(jù)線芯規(guī)格確定模芯孔徑以及模芯外錐zui小外徑等尺寸； 2.5 根據(jù)獲得的模芯的相關(guān)數(shù)據(jù)計(jì)算處模芯外錐錐角，并驗(yàn)證與模套的角度差是否符合設(shè)計(jì)要求；

According to the 2.4 core specifications to determine the core diameter and core diameter of the outer cone minimum size; 2.5 according to the relevant data obtained at the core computing core outer cone angle, and to verify and die angle difference with the design requirements;

3、根據(jù)模芯、模套的相關(guān)尺寸繪制零件圖，加工使用驗(yàn)證。

3, according to the relevant dimensions of mould core, die drawing, process validation.

3.6 下面，我們再簡單介紹擠出機(jī)螺桿的壓力及出膠量等方面的知識，供大家參考：

3.6 below, we will simply introduce the extruder screw pressure and the amount of plastic and other aspects of knowledge, for your reference:

3.6.1普通擠出機(jī)用等距不等深螺桿（漸變型螺桿）的出膠量計(jì)算公式：

Formula for calculating the volume of the out of the 3.6.1 ordinary extruder with equal distance and deep screw:

Q= (u×b×h1×h2) /( h1+h2) –(b×g×p×h12×h22)/( b×η×L×（h1+h2）)

Q= (U * b * H1 * H2) / (h1+h2) - (b * g * p * H12 * H22) / (b * n * L * (h1+h2))

其中：Q：擠出量 cm3/min

Among them: Q: extrusion cm3/min

u：螺桿在推進(jìn)方向的速度（即螺桿轉(zhuǎn)速）cm/min

U: the screw in the direction of the speed (that is, the screw speed) cm/min

b：螺槽的寬度（法向）cm

B: the width of the spiral groove (normal) cm

h1：填實(shí)點(diǎn)螺桿深度（進(jìn)料口螺桿深度）cm

H1: filling screw depth (feed screw depth) cm

h2：端部螺桿深度（出料口螺桿深度）cm

H2: end of the screw depth (outlet screw depth) cm

g：重力加速度 cm/min

G: acceleration of gravity cm/min

η：塑料的粘度 kg/cm•min

ETA: plastic viscosity of kg/cm - min

p：擠出壓力 kg/cm2

P: extrusion pressure kg/cm2

L：從填實(shí)點(diǎn)到端部螺紋展開長度（螺紋旋合長度）cm

L: from the point to the filled end screw expansion length (screw length) cm

從上式中，我們可以發(fā)現(xiàn)：

From the above formula, we can find:

1、擠出壓力越大，擠出量就越小；

1, the greater the pressure, the smaller the amount of extrusion;

2、螺槽深度越淺，擠出量越穩(wěn)定；

2, the depth of the spiral groove is shallow, the extrusion quantity is more stable;

3、螺槽寬度越大，擠出量越大，但寬度加大會使得螺紋寬度減小或塑化路徑縮短；

3, the width of the spiral groove is bigger, the extrusion quantity is bigger, but the width increases the assembly to make the thread width decreases or the reduction of the length of the plastic;

4、螺紋深度要適當(dāng)控制，螺紋深度越淺，則螺槽容積減小，擠出量減小，故太淺不行，但也不宜太深，太深則形成擠出量不穩(wěn)定；

4, the depth of the thread should be properly controlled, the depth of the thread is shallow, the spiral groove volume decreases, the extrusion volume decreases, so it is too shallow, but it should not be too deep, too deep, the formation of extrusion is not stable;

3.6.2塑料在螺桿中呈螺旋運(yùn)動(dòng)，螺桿旋轉(zhuǎn)產(chǎn)生剪切力，產(chǎn)生的剪切力將塑料剪切塑化，不同的材料需要不同的剪切力，才能達(dá)到理想的塑化

3.6.2 plastic in the screw in a spiral movement, the rotation of the screw to produce shear force, the shear force will be plastic shear plastic, different materials need different shear force, in order to achieve the ideal plastic