A kind of Novel hot runner cylinder system
Technical field
The utility model relates to the hot flow path cylinder system.
Background technology
The Main Function of hot flow path cylinder system is the motion of control needle, realization is to the SECO of injection moulding process, also can realize directly advancing glue at product surface, and be difficult for producing the injection defects such as wire drawing, curtain coating, jaundice, can avoid the generation of weld mark, satisfy the strict appearance requirement of product, have very high using value.
The cylinder core of common oil cylinder easily rotates in the reciprocating motion process, if needle rotates, can't realize the inclined-plane sealing, and the rotation of needle easily causes the situation of card pin broken needle to occur.
In addition, hydraulic jack is in when normal operation since with the hot runner manifold close together, a large amount of heats easily are delivered to oil cylinder from hot runner manifold, and the heat transmission of needle and the interior frictional heat of itself, cause the oil cylinder temperature very high.The oil cylinder excess Temperature easily causes seal to wear out and lost efficacy, and has had a strong impact on the service life of oil cylinder.Common oil cylinder is subjected to spatial limitation, complicated structure, and processing and assembling are all difficult, so the oil cylinder manufacturing expense is all higher.
The utility model content
The purpose of this utility model is to propose a kind of Novel hot runner cylinder system, and it can solve existing cylinder system when the inclined-plane sealing, the problem that cylinder core, needle all easily rotate.
In order to achieve the above object, the technical scheme that adopts of the utility model is as follows:
A kind of Novel hot runner cylinder system, it comprises gray iron, cylinder core and needle, the upper shed of cylinder cap and cylinder body is tightly connected, the cylinder core is assemblied in the cylinder body and is tightly connected with the under shed of cylinder body, needle is positioned at outside the cylinder body, and the top of cylinder core offers one and prevents the locating hole that the cylinder core rotates, and the bottom of cylinder cap is fixedly connected with an alignment pin, described alignment pin and locating hole are pegged graft, and the cylinder core can move along the length direction of alignment pin; The bottom of cylinder core offers one and prevents the lockhole that needle rotates, and the top of needle is assemblied in the described lockhole.
Preferably, described needle comprises square hanging platform, flat side, the needle body, and square hanging platform, flat side, the needle body from top to bottom connect successively, and square hanging platform, flat Fang Jun are positioned at lockhole, and flat side's anti-rotation mating surface cooperates with the anti-rotation mating surface of lockhole.
Preferably, in order to make things convenient for the mounting or dismounting of cylinder core, the top of cylinder core also offers the lifting screw hole, and described lifting screw hole and locating hole intersect.
Preferably, in order to reduce significantly the temperature of oil cylinder, prevent that at high temperature sex change of sealing ring is aging, the bottom of cylinder body is fixedly connected with a coldplate, and the middle part of coldplate offers middle through hole, and the bottom of cylinder core is arranged in through hole, and needle stretches out in middle through hole; Be provided with cooling water channel in the coldplate.
Further preferred, for the heat that reduces hot runner manifold to the oil cylinder transmission, the bottom of coldplate is fixedly connected with heat insulation meson by heat-insulating cushion block, heat insulation meson is set on the needle.
Further preferred, for the convenience of processing and assembling, cylinder body is provided with seal groove with the cooperation place that is connected of coldplate, and sealing ring is installed in the seal groove.
The utlity model has following beneficial effect:
Between cylinder core and the cylinder cap, all have anti-rotation structure between cylinder core and the needle, when the inclined-plane sealing, can prevent effectively that cylinder core, needle from rotating, can make oil cylinder satisfy specific (special) requirements such as being applicable to the inclined-plane sealing, promoted the versatility of oil cylinder, also promoted the stationarity of needle in the reciprocating motion process simultaneously, prevented that effectively the situation of card pin from occuring, improve the service life of needle, make the oil cylinder more stable work.
Description of drawings
Fig. 1 is the structural representation of the Novel hot runner cylinder system of the utility model preferred embodiment;
Fig. 2 is the structural representation of the needle among Fig. 1;
Fig. 3 is the structural representation of the cylinder core among Fig. 1;
Fig. 4 is the A-A line cutaway view of Fig. 3;
Fig. 5 is the B-B line cutaway view of Fig. 3;
Fig. 6 is the structural representation of the coldplate among Fig. 1;
Fig. 7 is the schematic diagram of Novel hot runner cylinder system when the inclined-plane sealing of the utility model preferred embodiment;
Fig. 8 is the schematic diagram that the Novel hot runner cylinder system of the utility model preferred embodiment is applied to TOP-TIP.
Reference numeral: 1, cylinder cap; 2, cylinder core; 3, cylinder body; 4, cooling water channel; 5, coldplate; 6, bolt; 7, sealing ring; 8, sealing ring; 9, sealing ring; 10, sealing ring; 11, sealing ring; 12, hydraulic circuit; 13, screw; 14, alignment pin; 15, sealing ring; 16, needle; 17, seal groove; 18, cushion block; 19, heat insulation meson; 20, cold water inlet; 21, delivery port; 30, main purt is chewed; 31, runner; 33, heat-generating pipe; 34, hot runner manifold; 36, Re Zui; 50, square hanging platform; 51, anti-rotation mating surface; 52, the needle body; 60, lockhole; 61, anti-rotation mating surface; 62, locating hole; 63, lifting screw hole; 100, product.
The specific embodiment
Below, by reference to the accompanying drawings and the specific embodiment, the utility model is described further:
Extremely shown in Figure 6 such as Fig. 1, a kind of Novel hot runner cylinder system, it comprises cylinder body 3, cylinder cap 1, cylinder core 2 and needle 16.
Cylinder cap 1 is tightly connected with the upper shed of cylinder body 3, specifically can realize by sealing ring 15.Cylinder core 2 is assemblied in the cylinder body 3 and is tightly connected with the under shed of cylinder body 3, specifically can pass through sealing ring 11, sealing ring 10 realizations.Needle 16 is positioned at outside the cylinder body 3.General, be respectively equipped with hydraulic circuit 12 on cylinder cap 1, the cylinder body 3, to press down or lift cylinder core 2.
The top of cylinder core 2 offers one and prevents the locating hole 62 that cylinder core 2 rotates, the bottom of cylinder cap 1 is fixedly connected with an alignment pin 14, described alignment pin 14 is pegged graft with locating hole 62, and cylinder core 2 can move along the length direction of alignment pin 14, concrete, cylinder cap 1 is fixedly connected with alignment pin 14 by screw 13, and the cross section of locating hole 62 is that non-circular shape and alignment pin 14 cooperate with locating hole 62, can realize anti-rotating function.The top of cylinder core 2 also offers lifting screw hole 63, and described lifting screw hole 63 intersects with locating hole 62.
The bottom of cylinder core 2 offers one and prevents the lockhole 60 that needle 16 rotates, and the top of needle 16 is assemblied in the described lockhole 60.Concrete, described needle 16 comprises square hanging platform 50, flat side (figure does not mark), the needle body 52, square hanging platform 50, flat side, the needle body 52 from top to bottom connect successively, and square hanging platform 50, flat Fang Jun are positioned at lockhole 60, and flat side's anti-rotation mating surface 51 cooperates with the anti-rotation mating surface 61 of lockhole 60.
The bottom of cylinder body 3 is fixedly connected with a coldplate 5, and the middle part of coldplate 5 offers middle through hole (figure does not mark), and the bottom of cylinder core 2 is arranged in through hole, and needle 16 stretches out in middle through hole; Be provided with cooling water channel 4 in the coldplate 5.Concrete, coldplate 5 is fixedly connected with cylinder body 3 by bolt 6, and cylinder body 3 is provided with seal groove 17 with the cooperation place that is connected of coldplate 5, and sealing ring 9 is installed in the seal groove 17, also is provided with sealing ring 8, sealing ring 7 between coldplate 5 and the cylinder body 3.Have cold water inlet 20 and delivery port 21 on the cooling water channel 4.
The bottom of coldplate 5 is fixedly connected with heat insulation meson 19 by heat-insulating cushion block 18, and heat insulation meson 19 is set on the needle 16.
As shown in Figure 7, the cylinder system of the present embodiment is when the inclined-plane sealing, sealing face between needle 16 and the product 100 is the inclined-plane, the end of needle 16 also is the inclined-plane, when cylinder core 2 drive needles 16 pump, because the anti-rotation structure between alignment pin 14 and the cylinder core 2, between cylinder core 2 and the needle 16 effectively prevents the rotation of cylinder core 2, needle 16, has avoided blocking the situation generation of pin, broken needle.
As shown in Figure 8, in the injection mo(u)lding of general TOP-TIP, main purt is chewed 30 and is joined with injection machine, and melten gel flows along runner 31, chews the 36 product die cavities that then arrive injection moulding by heat.There is heat-generating pipe 33 that heat is provided on the hot runner manifold 34, the melten gel temperature in the runner 31 can not descended naturally, keep the stable of its temperature.Heat is chewed 36 and is provided heat by heating circle, makes heat chew the temperature stabilization of melten gel in 36 runners.Cylinder core 2 is used for the motion of control needle 16, realizes injection moulding process is carried out SECO.
In cylinder system when work, is because from the close together of the hot runner manifold 34 of high temperature, a large amount of heats easily is delivered to cylinder core 2, cylinder body 3.If the cylinder system temperature is too high, the easy sex change of the sealing ring of cylinder system is aging, and the cylinder system of the present embodiment has coldplate 5, after cold water inlet 20, delivery port 21 are connected fortune water, cooling water in the cooling water channel 4 can constantly absorb the heat of coldplate 5, thereby greatly reduce the temperature of cylinder system, avoid the too fast aging of sealing ring, prolonged the service life of cylinder system.In addition, between coldplate 5 and heat insulation meson 19, be provided with cushion block 18, because cushion block 18 adopts the material manufacturing of poor thermal conductivity, also can reduce heat to the cylinder system transmission, also save cost simultaneously.
In addition, 3 cooperation places of coldplate 5 and cylinder body are provided with seal groove 17.Deep trouth processing difficulty relatively in the common hole, and this hole processing that forms by the cooperation of two boards is fairly simple, and make the installation of sealing ring 9 and change conveniently, manufacturing cost saved.
For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and distortion should belong within the protection domain of the utility model claim all.