Do a good job of 13 vertical injection molding machine parameters check, small white become old master!

Mold embryo design specifications and the main parameters of the injection molding machine matching check is one thing that must be done, as you buy a very beautiful clothes, put on is not suitable, no matter how good it is useless, the mold is the same, the main parameters of the injection molding machine check is the final off, do not have to wait for a problem to pay great attention to, it is already too late!

There are many kinds of injection molding machine, common vertical, column type wheel, two-color wheel, high speed injection molding machine, according to the characteristics of the product plastic particles and product appearance and product specifications reliability selection for injection molding machine.

For example: 1. Products must be processed by injection molding 2 or a variety of plastic particles, choose two color machine injection processing. 2. Thick-wall products selection of high-speed machine, 3. Plastic particle is PEEK material temperature 400℃ mold temperature 180-200℃ selection of oil temperature machine, 4. Plastic granule is PVC corrosion selection bin extruder screw has done corrosion - resistant solution machine.

After the type of injection molding machine is selected, the size of the injection molding machine is selected at the beginning. Is it 120T or 1000T?

In a word, the main parameters of oil-electric hybrid vertical injection molding machine should be consistent with the mold specifications of the product. Under normal circumstances, it can be small or not large. The small injection molding machine must not be on the injection molding machine to reduce the cost.

Taking the main parameters of 470T injection molding machine as an example, the pairing factors of the main parameters of the harmful product mold and injection molding machine are subdivided into 13 points to interpret one by one. Let everyone more easy to understand, and then in the specific use of skillfully.

1. Is the clamping force sufficient?

2. Is the net weight of the finished product within 80% of the output?

3. Is the interval in the support rod sufficient?

4. Is the allowable mold greater than the thickness?

5. Does the minimum allowable thickness of the mould meet the requirements?

6. Is moving mold travel arrangement (larger mold travel arrangement) sufficient?

7. Injection spacing (is the injection travel arrangement of mold products sufficient?)?

9. Is the muzzle curved half warp appropriate?

10. Is the gap between the nozzle and the die allowable?

11. Is the precise positioning ring size (flange size) appropriate?

12. Is the spacing and size of the jacking hole appropriate, taking into account the convenience of its own specimens?

13. Is the code template design appropriate?

1. Is the clamping force sufficient?

When the plastic melt in the high pressure injection into the mold die cause the energy of the slurry, 45 t single board of vertical injection molding machine for support solution rolling out of the mold, injection molding machine to mold release clamping force, clamping force, clamping force line do to lock the door and big modulus was left AB board do lock up all in accordance with the design scheme to avoid clamping force is not enough.

There are three common ways to measure clamping force:

The first way is measuring the clamping force according to the mold flow analysis, common Moldflow mold flow analysis, the following figure, Max. The Clampforceis258.2 tonne. The larger clamping force is 258.2tonne

The second: clamping force (T) = the product opening and closing mold position of the expansion area CM2X plastic material working pressure index /90% (rated clamping force)

For example: product 1 goes out 2, plastic rubber grain is ABS, working pressure index means: 0.32

Product expansion area :20X10=200cm2

Runner expansion area: 0.7x10 =7cm2

Clamping force = (200+7) x0.32/0.9 =73.6T

The machine should be more than close to the tonnage, can not choose small, such as 86T120T machine

Third: according to the plastic material, using the mold working pressure method to measure the clamping force of the injection molding machine

Mold locking force (F) = expansion area (cm2)X number of die holes X working pressure in the structure (P)(kg/cm2)

How to measure the working pressure in the structure easily

Generally, ABSPSPEPP plastic particles can be selected above 200(kg/cm2) for measurement. PCPEEK and other plastic particles are not easy to walk adhesive and high viscosity rubber products. In addition, thick-wall products and grooming products are also measured by 300-400(kg/cm2)

For example: product 1 out of 2, plastic particles are ABS, the working pressure in the structure: 200(kg/cm2)

Product expansion area :20X10=200cm2

Runner expansion area: 0.7x10 =7cm2

Clamping force (T) = (200+7) X2X200=82800,

Unit conversion: 82800/1000=82.8T

The machine should be more than close to the tonnage, can not choose small, such as 120T machine

About the expansion of the area calculation method, in the lai single directory - assist - instruction searcher - type projection - to measure the total area, generally can immediately select the product measurement, if the product is quite large, too much, can do a square first, to square the surface measurement.

2. Is the net weight of the finished product within 80% of the output?

Regarding the injection net weight, take the main parameters of 470T injection molding machine as an example, the injection net weight is 1296g, in other words, the injection molding machine each injection number is at most only so much injection, for safety factor consideration, the net weight of finished products can be within 80% of the amount of injection. There is a misunderstanding that the machine is placed under the mold, injection processing is all normal, do not consider the injection of net weight elements, out of context, not desirable.

3. Is the interval in the support rod sufficient?

Relevant support bar within the interval, with 470 t for example, level is 820 x800mm vertical, very is the total width of the mould level 820 mm (W), everything was normal die no more than to be able to put (as shown in figure 1), if the total width is beyond the level of the machine mould distance, in the mold its thickness under the condition of the premise of no more than a horizontal distance, according to the rotary die (is actually die rotate ninety degrees to put the machine first, then turn to ninety degrees in the mold) (as shown in figure 2).

In summary: the total width and thickness of the die shall be less than or at least one side less than the horizontal spacing of the supporting rod

4. Is the allowable mold greater than the thickness?

In a 470 t precision vertical injection molding machine custom main parameters for example, allow mould large thick 780 mm, provisions of mould is bigger Bao hou can not exceed 780 mm, mould figure inspection, be sure to check all enterprises have had a wrong, customer specific tonnage, also is not the same as the famous brand of the machine, allow the mould is bigger Its thickness is different, examine only a kind of main parameters in the machine, considered to be the same, the result to go die when he found that there is a place, another thick super, customer mad, didn't go back.

5. Does the minimum allowable thickness of the mould meet the requirements?

Taking the main parameters of 470T injection molding machine as an example, the minimum thickness of the mold is allowed to be 320Mm, and the larger thickness of the mold can not be less than 320Mm. If you want to thicken the mold, it is proposed to widen the square iron to reduce the cost. Together with the fourth and fifth points, the thickness of the mold should be close to the middle of the allowable mold thickness of the injection molding machine.

6. Is moving mold travel arrangement (larger mold travel arrangement) sufficient?

In 470 t for example, allows larger move mould schedule (as shown in figure 3), 780 mm is large thick measure according to lose, in the specific scheduling (S) = larger move mould schedule 780 mm + (allow mold larger thick - mold concrete thick), if the injection schedule of the products is very high, is the numerical simulation, the product is easy to remove, spacing is at least the mold ejection spacing 2 times, to know this won't be too hard, deep cavity products are the most significant (as shown in figure 16).

In addition, the ejection distance should also be the length of the water adding part, and the minimum interval of the mechanical arm should be taken into account.

7. Injection spacing (is the injection travel arrangement of mold products sufficient?)?

The injection spacing is very well understood, 470T is 200mm, we must pay attention to the secondary injection, is the total number of two injection spacing, check the injection spacing of the machine should be very careful.

8. Does the minimum mold specification meet the requirements?

Taking the main parameters of the 470T injection molding machine as an example, the minimum mold specification (length X width) is 580X560mm. There is no such stipulation on the small mold. This must be checked when the small mold is on the middle machine.

9. Is the muzzle curved half warp appropriate?

Take 470T as an example, the nozzle surface is half through SR15, different machines are different, if the customer did not send the situation, can choose to make flat or make R40, after confirmed can be secondary production and processing. There's no need to replace it.

10. Is the gap between the nozzle and the die allowable?

Taking the main parameters of the 470T injection molding machine as an example, the spacing between the larger nozzle and the mold is 50 mm. The spacing on the mold is calculated from the control panel without insulation material, and the insulation material starts from the insulation material with it (as shown in Fig. 5). The design scheme should not be checked to avoid leakage

11. Is the precise positioning ring size (flange size) appropriate?

Taking the main parameters of 470T injection molding machine as an example, the specification of the precise positioning ring is Ø200. The precise positioning ring is used for the precise positioning of the mold in the injection molding machine, which is convenient and rapid to correct the nozzle hole. Generally, moving mold and precise positioning are done.

12. Is the spacing and size of the jacking hole appropriate, taking into account the convenience of its own specimens?

Top stick hole spacing and inch thread 2 kinds of nominal diameter, the specimen, most with the machine, the vast majority of interval is English, if you design the top stick hole spacing is the nominal diameter of thread, had better be to use the design into a metric system with (pictured), elliptic, convenient specimen (figure 8), top stick hole size at least 35 mm in diameter. The size of the jack hole tooth is based on the customer's machine design.

13. Is the code template design appropriate?

On the code template, the screw teeth of the mother are used for the code mold. There are two general code mold methods, coding software (Figure 9) and locking screw (Figure 9). The locking screw is commonly used in the two-color machine column machine with a roulette.

There is also a magnetic code mode, magnet immediately suck up fixed, in addition to pay attention to the water and Green column can not interfere with the code mode. In addition, the water design scheme is as far as possible to the center, leaving 2 side code mold interior space.

Summary: 13 points applied to the mold design scheme, the design scheme fewer mistakes, twice the result with half the effort!