CN201205749Y - An automatic separation device for finished product and gate - Google Patents

Abstract

The automatic separating device for the finished product and the sprue comprises an insert arranged in a mold core, wherein a channel communicated with a flow channel is arranged on the insert, the other end of the channel is a sprue, a cutter for cutting off and separating a plastic part and a solidified material is arranged in the insert, the cutter comprises a blade and a cutter seat, the blade is arranged at the joint of a cavity and the sprue, the size of the blade is consistent with the size of the cross section of the sprue and is arranged at the bottom of the sprue, and the cutter seat is connected with a pushing device for enabling the blade to extend into the sprue and a return device for enabling the blade to fall back. The utility model discloses after the die cavity is injected into to the sizing material, when the pressurize got into the cooling, the blade stretched into the runner in, shut off (cut off) in the runner congeal the material be connected with the mould of die cavity, guaranteed that the product is intact, not be responsible for putting the production time, realized before the die sinking with the separation of the congealing material (mouth of a river material) in finished product and the runner.

Description

An automatic separation device for finished product and gate

Technical field:

The utility model relates to the field of mold injection molding, in particular to a device for realizing the automatic separation of finished products and gate waste.

Background technique:

When using a mold to produce plastic products, the rubber is injected into the molding cavity in the mold through the gating system. After the rubber in the molding cavity hardens, the mold is opened to take out the product, and the product taken out of the mold is also mixed with the flow in the gating system The rubber material (commonly known as the nozzle material) at the channel or runner is connected, and the product needs to be separated from the waste to make a usable product. This process needs to arrange staff to use special equipment to operate, resulting in problems such as high labor intensity, low production efficiency, high cost, and long production cycle. The product quality is greatly affected by human factors and the stability is poor. In order to separate the product from the waste, there are three ways to automatically cut off the waste in the mold of the side gate gating system: one is the differential ejection cutting method, which is to stagger the ejection of the product and the aggregate of the gate runner When the mold is opened and ejected, the product is ejected first, and the gate runner condensate remains in the movable mold. After the product is separated from the gate runner condensate under the action of the thimble, the runner thimble again Ejecting out the runner means ejecting the condensed material in the gate runner; the second is the pre-ejecting cutting method, pre-ejecting means pre-ejecting, during the process of injection and pressure holding, the ejector rod of the ejection shaft can realize the advancement and The function of retraction, when the injection molding machine starts to shoot at any time, the pre-ejection rod can advance to the gate and cut it off, and the gate shear needle in the mold will compress (cut off) the gate of the molded product , the molded product and the runner are thus separated, and the forward time of the gate shearing needle is freely adjusted by the time controller; the third is the oil cylinder slider cutting method, which is characterized by a movable and fixed template at the gate Two movable inserts are made on the upper part, the mold is opened twice, and the fixed mold is opened once separately. When the mold is opened for the first time, it will not move with the fixed platen, and the fixed platen will move back together with the movable mold to make room for the gate runner. The runner condensate pushes away from the product, and then continues the second mold opening, and finally ejects. To sum up, the differential ejection method is currently the simplest way to automatically cut off the side gate, but the appearance quality of the product is poor; the pre-ejection method requires the injection molding machine to have the function of pre-ejection, and in the mold structure, Except for the runner shear needle, the bottom of all other thimbles must be reamed to ensure that the runner shear needle can have a certain pre-jacking distance; the gate cut surface of the oil cylinder slider cutting method is flat, and the product appearance quality is high. The disadvantage is that the cost is higher and the processing is more difficult.

Utility model content

The problem to be solved by the utility model is to provide a device that improves production efficiency, has a simple structure, and can automatically cut off the flow channel condensate contained in the finished product and realize the separation of the finished product and the condensate.

In order to solve the above technical problems, the technical solution adopted by the utility model is to design an automatic separation device for the finished product and the gate, including the insert set in the mold, and the insert is provided with a channel communicating with the flow channel. The other end of the gate is the gate, and the insert is provided with a knife for cutting and separating the plastic part from the aggregate. The knife is composed of a blade and a tool holder. The blade is set at the joint between the cavity and the gate. The cross section of the gate has the same size and is placed at the bottom of the gate, and the tool seat is connected with a pushing device that makes the blade extend into the gate and a return device that makes the blade fall back.

The insert is fixed in the core of the mold by a hanging table or a screw.

The cutter is in the shape of a rectangular flag or a convex shape. The cutter is composed of a blade and a cutter seat, and the blade made of high-strength and high-toughness steel is arranged on the rectangular cutter seat.

As the preferred solution of the utility model is: the pushing device is made up of a piston, a thimble, a turning air nozzle and an air pipe, the thimble extends into the piston, the other end of the thimble is connected with the tool seat, and one end of the turning air nozzle is connected to the piston. The other end, the other end of the turning nozzle is connected to the air pipe. When the air pipe blows, the piston pushes the thimble to make the blade extend into the gate. When the air pipe stops blowing, the blade returns to its original position under the action of the return device.

The return device is a return spring. There is a hole for placing the return spring on the top of the tool holder. When the thimble pushes the blade into the gate, the return spring is compressed. After the air blowing is stopped, the thimble falls back to make the blade back to the original position.

As another preferred solution of the utility model is: the pushing device includes a cylinder or an oil cylinder, a pad, a return pin and a chute, the cylinder or an oil cylinder is connected with the pad to move the pad left and right in the chute, and return to the original position. One end of the needle is placed in the chute, and the cushion block and the return needle are provided with a corresponding slope, and the other end of the return needle is placed above the tool seat. When the slope of the cushion block guides the slope of the return needle, the return The positioning needle positions the tool, at this time the blade does not move, and the return device is pressed; when the pad moves back, the return needle releases the tool, and the return device makes the blade extend into the gate.

The return device is a working spring, and there is a hole at the bottom of the tool seat, the working spring is placed on the hole, and the working spring works with the movement of the return needle up and down.

The beneficial effects of the utility model are: after the rubber material is injected into the mold cavity, when it is kept under pressure and cooled, the blade extends into the gate to cut off (cut off) the connection between the condensate in the gate and the plastic part of the mold cavity, so as to ensure that the product is intact and Without delaying the production time, the finished product can be separated from the condensed material (nozzle material) in the runner before the mold is opened. The device of the utility model has simple structure and low cost, realizes automatic separation of nozzle materials, and avoids manual separation of nozzle materials after mold opening and ejection.

Description of drawings:

Fig. 1 is a schematic structural view of Embodiment 1 of the utility model;

Fig. 2 is a schematic diagram of the connection structure between the tool and the insert in Fig. 1;

Fig. 3 is a schematic diagram of tool movement in Fig. 1;

Fig. 4 is a schematic diagram of the insert structure in Fig. 1;

Fig. 5 is a schematic diagram of the cutter structure in Fig. 1;

Fig. 6 is a structural schematic diagram 1 of Embodiment 2 of the utility model;

Fig. 7 is a structural schematic diagram II of Embodiment II of the utility model;

Fig. 8 is a connection schematic diagram 1 of the return needle, the tool and the insert in Fig. 7;

Fig. 9 is a second schematic diagram of the connection of the return needle, the tool and the insert in Fig. 7;

Fig. 10 is a front view of the tool in Fig. 7 and Fig. 8;

Fig. 11 is the right view of Fig. 10;

Fig. 12 is a schematic diagram of the insert structure in Fig. 7 and Fig. 8 .

Detailed ways:

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figures 1 to 5, the structure schematic diagram of the first embodiment of the utility model's finished product and gate automatic separation device applied on the mold, the mold includes a fixed mold 1, a movable mold 2 and a mold core 9, and the mold core 9 is equipped with There is a cavity 3, the cavity 3 communicates with the flow channel 4, and an insert 6 is arranged between the cavity 3 and the flow channel 4. The bottom of the insert 6 is provided with a hanging platform 61, which can be placed on the mold core 9 It is convenient to fix the insert 6. The insert 6 has a shape that matches the cutter 5 and enables the cutter to move on it. The insert 6 is provided with a channel that communicates with the flow channel 4. The other end of the channel is a pouring Mouth 10. The cutter 5 is in the shape of a rectangular flag. The blade 52 on the cutter 5 is arranged at the junction of the gate 10 and the outer wall of the cavity 3. The size of the blade 52 is consistent with the cross-sectional size of the gate and is arranged at the bottom of the gate. The blade 52 Cooperating with the outer wall of the cavity 3 and the outer wall of the insert 6, the plastic is injected into the cavity 3 through the runner 4, the gate 10 and the blade 52, and the height of the blade in the gate can control the size of the gate 10. The tool seat 51 is connected with the pushing device composed of the piston 11, the thimble 12, the turning air nozzle 13 and the air pipe 14, the thimble 12 extends into the piston 11, the other end of the thimble 12 is connected with the tool seat 51, and the turning air nozzle 13 is fixed on the The other end of the piston, air pipe 14 is connected with the turning valve. A hole 54 is formed on the top of the tool seat 51, and a return spring 7 for returning is placed in the hole of the hole 54.

After the rubber material in the cavity 3 is kept under pressure and enters the cooling process, air is blown from the air pipe 15, and the piston 11 pushes the thimble 12, so that the blade 52 extends into the gate 11, and the condensed material connected to the plastic part on the gate (Nozzle material) material cutting (shutoff action), at this moment, back-moving spring 7 is compressed, and trachea stops blowing, and thimble 12 falls back, and back-moving spring 7 resets, and blade 52 is got back on the original position. 2 and 3 are schematic diagrams of the action process of the blade 52 in the gate. FIG. 4 is a schematic structural view of the insert 6 . picture. 5 is a schematic view of the cutter structure. The blade 52 is made of high-strength, high-toughness steel. The blade 52 is provided with a 45-degree edge, and the hole 54 is used to place the return spring 7 .

As shown in Figures 6 to 12, another schematic diagram of the structure of the second embodiment of another automatic separation device for finished products and gates of the present invention applied to the mold. The mold includes a fixed mold 1, a movable mold 2, and a mold core 9. A cavity 3 is provided in the mold core 9, and the cavity 3 communicates with the flow channel 4. An insert 6 is arranged between the cavity 3 and the flow channel 4. Two examples of the insert 6 have through holes 61, and the screws 62 pass through the through holes 61 and the insert 6 is fixed on the mold core 9, and the insert 6 has a shape that matches the convex cutter 5 and makes the insert 6 fit. The cutter moves on it, and the blade 52 on the cutter 5 is arranged at the junction of the gate 10 and the outer wall of the cavity 3. The size of the blade 52 is consistent with the cross-sectional size of the gate and is arranged at the bottom of the gate. The outer wall of the cavity 3 cooperates with the outer wall of the insert 6, and the plastic is injected into the cavity 3 through the runner 4, the gate 10 and the blade 52, and the height of the blade in the gate can control the size of the gate 10. The cutter seat 51 is connected with the pushing device and the return device.

Described pushing device comprises air cylinder or oil cylinder 15, spacer 16, return needle 17 and chute 18, and chute 18 is arranged on fixed mold 1, and air cylinder or oil cylinder 15 is connected with spacer 16 and makes spacer 16 slide Move left and right in the slot 18, one end of the return needle 17 is placed in the chute 18, the pad 16 and the return needle 17 are provided with corresponding slopes 19, 20, and the other end of the return needle 17 is placed on the tool holder. Above, when the slope 19 of the spacer 16 guides the slope 20 of the return needle 17, the return needle 17 positions the cutter 5, and at this moment, the blade 52 does not move, and the return device is pressed; when the spacer 16 moves back, The return pin 17 unclamps the tool 5, and the return device makes the blade 52 stretch into the gate 12.

The return device is a working spring 8, which has a hole 55 at the bottom of the tool holder 51, the working spring 8 is placed on the hole 55, and the working spring 8 works with the return needle 17 moving up and down.

As shown in Figure 12, it is a top view of the insert 6 of the second embodiment. Through holes 61 are provided on both sides of the insert 6, and screws 62 (not shown in the figure) pass through the through holes 61 and fix the insert 6 to the core of the mold. 9 inside. The insert 6 is provided with a channel communicating with the flow channel 4 . Shown in dotted line in the figure, is the installation position of cutter 5.

The innovation of the utility model lies in that the coagulation material and the plastic part are automatically separated by the cutter set in the mold core, and the finished product defined in the utility model refers to the injection molded part formed by the cavity. The above-mentioned two embodiments are only the specific application of the tool, the pushing device and the return device of the utility model, and are not intended to limit the utility model. Any inventions and creations made based on the concept of the utility model should be within the scope of protection of the utility model. Inside.

Claims (7)

1. finished product and cast gate automatic separating apparatus, comprise insert (6) that are arranged in the die (9), insert (6) be provided with the passage that communicates with runner (4), the other end of this passage is cast gate (10), insert be provided with in (6) be used for plastic with coagulate material and cut off the cutter (5) that separates, described cutter (5) is made up of the blade (52) and the base of tool (51), blade (52) is arranged on die cavity (3) and cast gate (10) joint and places the bottom at cast gate place, and the base of tool (51) is connected with the returning device that blade is fallen after rise with the thrust unit that makes blade (52) stretch into the cast gate place.

2. finished product according to claim 1 and cast gate automatic separating apparatus is characterized in that: described inserting (6) is fixed in the die (9) by hanging platform (19) or screw (62).

3. finished product according to claim 2 and cast gate automatic separating apparatus, it is characterized in that: rectangular flag shape of described cutter (5) or convex, cutter is made up of the blade and the base of tool, the blade (52) that adopts high strength, the steel of high tenacity to be made is arranged on the rectangle base of tool, and the size of blade (52) is consistent with cast gate (10) cross section size.

4. according to described finished product of each claim and cast gate automatic separating apparatus in the claim 1～3, it is characterized in that: described thrust unit is by piston (11), thimble (12), changing curved valve (13) and tracheae (14) forms, thimble (12) stretches in the piston (11), the other end of thimble (12) is connected with the base of tool (51), one of turning valve (13) terminates at the other end of piston (11), the other end of turning valve (13) is connected with tracheae (15), when tracheae (14) is blown, piston (11) promotes thimble (12), blade (52) is stretched in the cast gate (10), tracheae (14) is when stopping to blow, under the effect of returning device, blade (52) is got back to original position.

5. finished product according to claim 4 and cast gate automatic separating apparatus, it is characterized in that: described returning device is back-moving spring (7), have the hole (54) of placing back-moving spring (7) on the top of cutter tool seat (51), after thimble (12) promotion blade (52) stretches into cast gate, back-moving spring is compacted, after stopping to blow, thimble (12) falls after rise, makes blade (52) get back to original position.

6. according to described finished product of each claim and cast gate automatic separating apparatus in the claim 1～3, it is characterized in that: described thrust unit comprises cylinder or oil cylinder (15), cushion block (16), return pin (17) and chute (18), cylinder or oil cylinder (15) are connected with cushion block (16) and make cushion block (16) move left and right in chute (18), one end of return pin (17) places in the chute (18), cushion block (16) and return pin (17) are provided with corresponding inclined-plane (19), (20), the other end of return pin (17) places the top of the base of tool, when the inclined-plane (20) of the inclined-plane (19) of cushion block (16) guiding return pin (17), return pin (17) is located cutter (5), blade this moment (52) is motionless, and returning device is compacted; When cushion block (16) travelling backwards, return pin (17) loosening cutter (5), returning device stretch in the cast gate (12) blade (52).

7. finished product according to claim 6 and cast gate automatic separating apparatus, it is characterized in that: described returning device is working spring (8), have hole (55) in the bottom of the base of tool (51), working spring (8) is placed on the hole (55), and working spring (8) moves up and down with return pin (17).

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