CN108773032A - Vehicle heater unit housing injection mold ejecting mechanism - Google Patents

Abstract

The invention belongs to the field of injection moulds, and specifically discloses an ejection mechanism for an injection mold of an automobile heater shell; it includes a receiving plate arranged between a base and a fixed mold, and several ejector rods are arranged on the receiving plate, and the upper end of the ejector rod is Both are equipped with telescopic rods; the diameter of the telescopic rods is smaller than the diameter of the through hole, and there is a sealing plate on the telescopic rods; there are three clamping blocks slidingly connected to the side of the fixed mold cavity, and the clamping blocks are respectively fixedly connected with the piston rods of the corresponding cylinders. The cylinders are all fixedly connected to the fixed mold; the rodless chamber of the first cylinder communicates with the rod chambers of the second cylinder and the third cylinder respectively through pipes, and the rodless chambers of the second cylinder and the third cylinder are equipped with ventilation holes ; The first rack is fixed on the first clamping block, the first rack is meshed with a gear, the gear is meshed with a second rack, and the second rack is fixedly connected with the receiving plate; the purpose of the present invention is to solve the problem of the ejection mechanism When the worker does not take off the product, the product is driven downward to collide with the chamber, and the product may fall and be damaged.

Description

Ejection mechanism of injection mold for automobile heater shell

technical field

The invention belongs to the field of injection molds, and specifically discloses an injection mold ejection mechanism for an automobile heater casing.

Background technique

Injection mold is a molding mold widely used in the production of plastic parts, and it is also a tool to give plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain complex-shaped parts. The injection mold consists of two parts, the movable mold and the fixed mold. The movable mold is installed on the movable template of the injection molding machine, and the fixed mold is installed on the fixed template of the injection molding machine. During injection molding, the movable mold and the fixed mold are closed to form a gating system and a cavity, and the hot-melted plastic is injected into the cavity through the gating system, and the required product is formed after cooling and molding. When the mold is opened, the movable mold and the fixed mold are separated, and the product is ejected from the cavity by using the ejector mechanism, so as to avoid damage caused by manual forced product removal.

In order to solve the above problems, the patent No. CN102601942A discloses an injection mold ejection mechanism, which includes a first ejection guide hole corresponding to each other on the mold movable platen and the movable mold core; the ejector mechanism is located on the mold movable platen and The lower part of the movable mold core includes a thimble base plate, a thimble panel arranged on the thimble base plate, a first thimble having one end arranged on the thimble base plate and the other end passing through the thimble panel and inserted into the first ejection guide hole, and acting on the thimble pin. The driving device of the bottom plate also includes a second thimble, a driving rod, and a rotatable ejector block pivotally arranged between the thimble panel or the top plate bottom plate or between the thimble panel and the top plate bottom plate; The second ejection guide holes correspond to each other; the ejection block has a driving part and a pushing part. The invention simplifies the structure of the mold, reduces the manufacturing cost of the mold, and improves the automatic production degree of the mold.

However, the ejection mechanism in the above invention is a process of reciprocating up and down independent of the mold. When the worker fails to remove the product in time, the ejection mechanism drives the product to move downward. Collision, the product may fall and be damaged.

Contents of the invention

The invention discloses an ejection mechanism of an injection mold for an automobile heater shell, aiming to solve the problem that the ejection mechanism may drive the product to move downward and collide with a chamber when the product is not removed by the worker, and the product may fall and be damaged .

In order to solve the above problems, the basic solution of the present invention is: the ejection mechanism of the injection mold of the automobile heater housing, including a receiving plate vertically slidably connected between the base and the fixed mold, and several tops are fixed on the upper surface of the receiving plate. The upper end of the ejector rod is fixedly connected with a telescopic rod; the fixed mold is provided with a through hole for the ejector rod to slide up and down, the diameter of the telescopic rod is smaller than the diameter of the through hole, and the upper surface of the telescopic rod is fixed with a sealing plate for The first clamping block, the second clamping block and the third clamping block are respectively arranged on the sides of the cavity of the fixed mold, and the clamping blocks are all horizontally slidably connected to the fixed mold. The piston rod of the first cylinder is fixedly connected; the second clamping block is fixedly connected with the piston rod of the second cylinder, the third clamping block is fixedly connected with the piston rod of the third cylinder, and the cylinder bodies of the cylinders are all fixedly connected on the fixed mold ; The rodless cavity of the first cylinder communicates with the rod cavity of the second cylinder and the third cylinder respectively through pipelines, and the rodless cavity of the second cylinder and the third cylinder are all provided with ventilation holes; fixed on the first clamping block There is a first rack, the first rack is engaged with a gear, the gear is rotatably connected to the fixed mold, the gear is engaged with a second rack placed vertically, and the bottom end of the second rack is fixedly connected with the receiving plate.

The basic principle of this scheme is: in the initial state, the first clamping block, the second clamping block and the third clamping block are all attached to the chamber, and the sealing plate closes the through hole to prevent the telescopic rod from being stressed before the product is cooled and formed shrink.

After the car heater shell is shaped, the above-mentioned clamping blocks are all in the state of clamping the car heater shell, and the movable mold is separated from the bonding state with the fixed mold, and the worker holds the handle to move the first clamping block towards the fixed mold. Pull out in a direction away from the chamber, and the first clamping block is out of the state of clamping the automobile heater shell.

When the first clamping block moves away from the chamber, since the cylinder body of the first cylinder is fixed on the fixed mold, during the movement of the first clamping block at this time, the first clamping block pushes the cylinder of the first cylinder The piston rod moves away from the chamber; the piston rod of the first cylinder pushes the piston plate to move toward the rodless chamber, and the gas in the rodless chamber in the first cylinder is squeezed to increase the pressure in the rodless chamber, and the pressure in the rodless chamber increases. The gas in the rodless chamber in the first cylinder flows out through the pipeline under the action of pressure, and the gas flows through the pipeline into the rod chambers of the second cylinder and the third cylinder respectively.

The gas in the rod chamber of the second cylinder increases, and the pressure in the rod chamber increases, and the gas in the rod chamber begins to squeeze the piston plate of the second cylinder, pushing the piston plate to move toward the rodless chamber of the second cylinder, and the piston The movement of the plate drives the piston rod to move towards the rodless chamber, at this time, the piston rod drives the second clamping block to move away from the chamber, and the second clamping block breaks away from the state of clamping the car heater housing; at the same time, the piston When the plate moves to the rodless cavity, the pressure in the rodless cavity increases, and the gas in the rodless cavity flows out from the vent hole under the action of the pressure.

Based on the same principle, the gas in the third rod chamber increases, so that the third clamping block moves away from the chamber, the third clamping block breaks away from the state of clamping the car heater shell, and the third cylinder The gas in the rodless cavity flows out through the cooling pipe, and finally the gas flows out through the air hole.

When the first clamping block moves away from the chamber, the first clamping block drives the first rack to move, the movement of the first rack drives the gear to rotate, and the rotation of the gear drives the second rack to move vertically upward; The upward movement of the second rack drives the receiving plate to slide upward, the receiving plate drives all the ejector rods to move upward, and the ejector rod drives the telescopic rod to move upward. Since the top of the telescopic rod is in contact with the car heater shell, when the telescopic rod moves upward, The clamping block has not completely disengaged from the state of clamping the heater housing, so the telescopic rod is contracted by the pressure exerted by the heater housing.

After the telescopic rod shrinks, the clamping blocks are all out of the clamping state, and the ejector rod drives the telescopic rod to continue to move upward, and the telescopic rod pushes the heater housing out of the chamber.

When the receiving plate moves upwards, the receiving plate and the fixed mold cooperate with each other to extrude the air bag.

When the workman stops pulling out the first clamping block, the above-mentioned linkage all stops, and the ejector rod and the telescopic rod stop moving, and the telescopic rod keeps the state that the heater shell is jacked up, which is convenient for the worker to pick up.

After the worker picks up the piece, the first clamping block is pushed back to the initial state through the handle. When the first clamping block moves, it drives the piston rod to move in the opposite direction, and the piston rod pulls the piston plate to move towards the chamber. At this time, there is no The rod chamber loses the extrusion of the piston plate, and the pressure in the rodless chamber decreases. Since the rodless chamber communicates with the rod chambers of the second cylinder and the third cylinder through pipes, the pressure in the rodless chamber decreases, so the second Gas in the rod chambers of the air cylinder and the third cylinder is sucked back into the rodless chamber of the first cylinder.

The gas in the rod chamber in the second cylinder decreases, the pressure in the rod chamber decreases, and the pressure in the rodless chamber does not change. Because there is a pressure difference between the rodless chamber and the rod chamber, the pressure in the rodless chamber The gas pushes the piston plate to move toward the direction of the rod cavity, so as to balance the pressure; and the movement of the piston plate pushes the piston rod, and the piston rod pushes the second clamping block until the second clamping block returns to its original position.

Based on the same principle, the gas in the rod cavity in the third cylinder is reduced, so that the third clamping block returns to its original position.

When the first clamping block moves towards the direction of the chamber, the first clamping block drives the first rack to move in reverse, the movement of the first rack drives the gear to rotate in reverse, and the reverse rotation of the gear drives the second rack to vertically Straight downward movement; the downward movement of the second rack drives the receiving plate to slide downward, and the receiving plate drives all the ejector rods and telescopic rods to move downward until the receiving plate returns to the initial position.

Compared with the prior art, this solution is equipped with a clamping block to cooperate with the chamber to process the product, and the parts such as the nozzle of the car heater shell are formed by the mutual cooperation of the clamping block, which simplifies the installation of the chamber. processing, reducing the difficulty of processing the mold cavity; and the above-mentioned multiple clamping blocks have been pulled out and reset synchronously, which improves the processing efficiency; at the same time, the movement of the clamping block and the movement of the ejection mechanism are linked to avoid When the worker does not take off the product, the ejector mechanism drives the product to move downward and collide with the chamber, and the product may fall and be damaged.

Further, the ventilation holes on the rodless chambers of the second cylinder and the third cylinder are connected with cooling pipes, and the nozzles of the cooling pipes face the chambers.

The pressure change in the second cylinder and the third cylinder is used to generate airflow, and the airflow is exported to cool down the product again, so as to avoid workers being scalded by the residual temperature of the product when picking up the piece.

Further, an air bag is fixed between the receiving plate and the fixed mold, the air bag is fixed on the ejector rod, the air bag is connected with a cooling pipe, and the mouth of the cooling pipe faces the chamber.

The airbag is used to buffer the movement of the receiving plate to prevent the workers from continuously pulling out the clamping block, and the receiving plate continues to move upwards to squeeze the fixed mold, which may easily cause damage to the fixed mold and the receiving plate; The plate still moves upwards to avoid damage to the fixed mold and the receiving plate; and the deformation of the air bag is used to generate airflow to cool down the product again.

Further, a handle is provided on the first clamping block. It is convenient for workers to pull out and reset the first clamping block.

Further, the nozzles of the cooling pipes are all provided with air diffusers. The gas flow area in the cooling pipe is expanded by using the air diffuser, increasing the contact surface between the air flow and the product, and strengthening the secondary cooling effect on the product.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the present invention;

Fig. 2 is the front view of Fig. 1;

Fig. 3 is the sectional view of A-A direction in Fig. 1;

Fig. 4 is the enlarged schematic diagram of place B in Fig. 1;

Fig. 5 is the enlarged schematic diagram of place C in Fig. 1;

FIG. 6 is an enlarged schematic view at point D in FIG. 1 .

Detailed ways

The following is further described in detail through specific implementation methods:

The reference signs in the accompanying drawings of the description include: fixed mold 1, cavity 2, first clamping block 3, second clamping block 4, third clamping block 5, first cylinder 6, second cylinder 7, the first Three cylinders 8, pipeline 9, cooling pipeline 10, telescopic rod 11, first rack 12, gear 13, second rack 14, ejector rod 15, receiving plate 16, first piston rod 20, second piston rod 21, The third piston rod 22, the air bag 23, the first piston plate 61, the first rod chamber 62, the first rodless chamber 63, the second piston plate 71, the second rod chamber 72, the second rodless chamber 73, the first Three piston plates 81 , a third rod chamber 82 , and a third rodless chamber 83 .

The embodiment is basically shown in Figure 1, Figure 2 and Figure 3: an injection mold ejection mechanism for an automobile heater housing, including a receiving plate 16 vertically slidably connected between the base and the fixed mold 1. Four ejector rods 15 are fixed on the upper surface of the plate 16, and the upper ends of the ejector rods 15 are fixedly connected with telescopic rods 11; the fixed mold 1 is provided with through holes for the ejector rods 15 to slide up and down, and the diameter of the telescopic rods 11 tops is smaller than that of the through hole. The aperture of the hole, the upper surface of the expansion rod 11 is fixed with a sealing plate, and the sealing plate is used to seal the through hole, while preventing the sealing plate from expanding and contracting downwards.

A first clamping block 3, a second clamping block 4 and a third clamping block 5 are respectively arranged on the sides of the cavity 2 of the fixed mold 1, and the three clamping blocks cooperate with the cavity 2 to form a heater. At the mouth of the housing, the clamping blocks are horizontally slidably connected to the fixed mold 1, and the first clamping block 3 is fixedly connected to the piston rod of the first cylinder 6, that is, the first piston rod 20; the second clamping block 4 is fixedly connected with the piston rod of the second cylinder 7, that is, the second piston rod 21; the third clamping block 5 is fixedly connected with the piston rod of the third cylinder 8, that is, the third piston rod 22; the cylinder bodies of the above-mentioned cylinders are all fixed Connected to fixed mold 1.

As shown in Fig. 4, Fig. 5 and Fig. 6: the first clamping block 3 is provided with a handle, the second rod chamber 72 and the third rod chamber 82 communicate with the first rodless chamber 63 respectively through the pipeline 9, In addition, both the second rodless chamber 73 and the third rodless chamber 83 are connected with a cooling pipe 10 , and the mouth of the cooling pipe 10 faces the chamber 2 .

The first clamping block 3 is fixed with a first rack 12, the first rack 12 is engaged with a gear 13, the gear 13 is rotatably connected to the fixed mold 1, the gear 13 is engaged with a second rack 14 placed vertically, and the second rack 14 is engaged with the second rack 14. The bottom ends of the two racks 14 are fixedly connected with the receiving plate 16 .

An air bag 23 is bonded to the receiving plate 16 , and the contact portion between the air bag 23 and the push rod 15 is bonded;

The nozzles of the above-mentioned cooling pipes 10 are all clamped with air diffusers that diffuse the flow range of the gas.

The specific implementation process is as follows: in the initial state, the first clamping block 3, the second clamping block 4 and the third clamping block 5 are all attached to the cavity 2, and a complete cavity 2 is formed with the movable mold for injection molding Set the shape to generate the car heater shell.

After the automobile heater casing is shaped, the above-mentioned clamping blocks are all in the state of clamping the automobile heater casing, and the movable mold is separated from the bonding state with the fixed mold 1, and the worker holds the handle to hold the first clamping block. 3 Pull out in the direction away from the chamber 2, the first clamping block 3 is out of the state of clamping the car heater shell, when the first clamping block 3 moves in the direction away from the chamber 2, due to the first cylinder 6 The cylinder body is fixed on the fixed mold 1, so during the movement of the first clamping block 3 at this time, the first clamping block 3 pushes the first piston rod 20 to move away from the chamber 2; the first piston rod 20 Push the first piston plate 61 to move towards the first rodless chamber 63, the gas in the first rodless chamber 63 is squeezed, the pressure in the first rodless chamber 63 increases, and the gas in the first rodless chamber 63 Under the effect of pressure, the gas flows out through the pipeline 9, and the gas flows through the pipeline 9 into the second rod chamber 72 and the third rod chamber 82 respectively.

The gas in the second rod chamber 72 increases, the pressure in the second rod chamber 72 increases, and the gas in the second rod chamber 72 begins to squeeze the second piston plate 71, so that the second piston plate 71 moves toward the second The rodless chamber of the cylinder 7 moves, and the movement of the second piston plate 71 drives the second piston rod 21 to move toward the second rodless chamber 73. At this time, the second piston rod 21 drives the second clamping block 4 toward the side far away from the chamber 2. direction movement, the second clamping block 4 breaks away from the state of clamping the car heater housing; at the same time, when the second piston plate 71 moves to the second rodless chamber 73, the pressure in the second rodless chamber 73 increases , the gas in the second rodless chamber 73 flows out from the cooling pipe 10 under the action of pressure, and finally the gas is ejected from the nozzle of the cooling pipe 10 onto the heater housing, and the gas cools the heater housing.

Based on the same principle, the gas in the third rod cavity 82 increases, so that the third clamping block 5 moves away from the chamber 2, and the third clamping block 5 breaks away from the state of clamping the car heater shell , the gas in the third rodless chamber 83 flows out through the cooling pipe 10, and finally the gas is sprayed from the nozzle of the cooling pipe 10 onto the heater shell, and the gas cools the heater shell.

When the first clamping block 3 moves away from the chamber 2, the first clamping block 3 drives the first rack 12 to move, the movement of the first rack 12 drives the gear 13 to rotate, and the rotation of the gear 13 drives the second gear The bar 14 moves vertically upwards; the second tooth rack 14 moves upwards to drive the receiving plate 16 to slide upwards, and the receiving plate 16 drives all the ejector rods 15 to move upwards, and the ejector rod 15 drives the telescopic rods 11 to move upwards. The car heater shell is in contact state, when the telescopic rod 11 moves upwards, the clamping blocks are not completely out of the state of clamping the heater shell, so the sealing plate at the top of the telescopic rod 11 is subjected to the force exerted by the heater shell. The downward pressure causes the telescopic rod 11 to contract.

After the telescopic rod 11 shrinks, the clamping blocks are all out of the clamping state, and the ejector rod 15 drives the telescopic rod 11 to continue to move upward, and the telescopic rod 11 pushes the heater shell out of the chamber 2 .

When the receiving plate 16 moves upward, the receiving plate 16 and the fixed mold 1 cooperate to squeeze the air bag 23, the pressure in the air bag 23 increases, the gas in the air bag 23 flows out through the cooling pipe 10, and finally the gas is ejected from the nozzle of the cooling pipe 10 To the heater shell, the gas cools the heater shell.

When the workman stops pulling out the first clamping block 3, the above-mentioned linkage all stops, and the push rod 15 and the telescopic rod 11 stop moving, and the telescopic rod 11 keeps the state that the heater housing is jacked up, which is convenient for the worker to pick up.

After the worker picks up the piece, the first clamping block 3 is pushed back to the initial state by the handle, and when the first clamping block 3 moves, it drives the first piston rod 20 to move in the opposite direction, and the first piston rod 20 pulls the first piston The plate 61 moves toward the first rod chamber 62. At this time, the first rodless chamber 63 loses the extrusion of the first piston plate 61, and the pressure in the first rodless chamber 63 decreases gradually. Due to the second rod chamber 72 The third rod chamber 82 communicates with the first rodless chamber 63 respectively through the pipeline 9, the pressure in the first rodless chamber 63 decreases, so the gas in the second rod chamber 72 and the third rod chamber 82 is sucked back into the first rodless cavity 63 .

The gas in the second rod chamber 72 decreases, causing the pressure in the second rod chamber 72 to decrease, while the pressure in the second rodless chamber 73 does not change, because the second rodless chamber 73 and the second rod chamber There is a pressure difference between the chambers 72, so the gas in the second rodless chamber 73 pushes the second piston plate 71 to move toward the second rod chamber 72 to balance the pressure; and the movement of the second piston plate 71 pushes The second piston rod 21 pushes the second clamping block 4 until the second clamping block 4 returns to its original position.

Based on the same principle, the gas in the third rod chamber 82 decreases, and the third piston plate 81 faces the third rod chamber 82 due to the air pressure difference, so that the third clamping block 5 returns to its original position.

When the first clamping block 3 moves toward the direction of the chamber 2, the first clamping block 3 drives the first rack 12 to move in reverse, and the movement of the first rack 12 drives the gear 13 to rotate in reverse, and the reverse rotation of the gear 13 The rotation drives the second rack 14 to move vertically downward; the downward movement of the second rack 14 drives the receiving plate 16 to slide downward, and the receiving plate 16 drives all the ejector rods 15 and telescopic rods 11 to move downward until the receiving plate 16 recovers. to the initial position; at the same time, the airbag 23 begins to return to deformation.

When the telescopic rod 11 moves downward, the contact between the sealing plate and the through hole is sealed. Since the sealing plate and the through hole are completely overlapped, the sealing plate cannot enter the through hole and move downward. The rod 11 is stretched to the initial state.

What is described above is only the embodiment of the present invention, and the common knowledge in the scheme is not described too much here. It should be pointed out that for those skilled in the art, under the premise of not departing from the structure of the present invention, several modifications and improvements can also be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation of the present invention. Effects and utility of patents. The scope of protection required by this application shall be based on the content of the claims, and the specific implementation methods and other records in the specification may be used to interpret the content of the claims.

Claims (5)

1. vehicle heater unit housing injection mold ejecting mechanism, including vertical sliding are connected to the undertaking between pedestal and fixed mold Plate, it is characterised in that：The upper surface of the bearing plate is fixed with several mandrils, and the upper end of mandril has been fixedly connected with telescopic rod； The through-hole slided up and down for mandril is provided on fixed mold, the diameter of telescopic rod is less than the aperture of through-hole；The surrounding of fixed mold chamber The first grip block, the second grip block and third grip block are respectively arranged on side, the equal level of grip block is slidably connected at cover half On tool, grip block is fixedly connected with the piston rod of the first cylinder；Second grip block is fixedly connected with the piston rod of the second cylinder, the Three grip blocks are fixedly connected with the piston rod of third cylinder, and the cylinder body of the cylinder is fixedly connected on fixed mold；First gas The rodless cavity of cylinder is connected to the rod chamber of the second cylinder and third cylinder respectively by pipeline, the nothing of the second cylinder and third cylinder Venthole is equipped in rod cavity；The first rack is fixed on first grip block, the first rack is engaged with gear, gear rotation connection On fixed mold, gear is engaged with the second rack placed vertically, and the bottom end of the second rack is fixedly connected with bearing plate.

2. vehicle heater unit housing injection mold ejecting mechanism according to claim 1, it is characterised in that：Second gas Cylinder is communicated with cooling pipeline with the venthole on the rodless cavity of third cylinder, the nozzle face chamber for the pipeline that cools down.

3. vehicle heater unit housing injection mold ejecting mechanism according to claim 2, it is characterised in that：The bearing plate Air bag is fixed between fixed mold, air bag is fixed on mandril, and cooling pipeline is communicated on air bag, and the nozzle for the pipeline that cools down is just To chamber.

4. vehicle heater unit housing injection mold ejecting mechanism according to claim 3, it is characterised in that：First folder It holds block and is equipped with handle.

5. vehicle heater unit housing injection mold ejecting mechanism according to claim 4, it is characterised in that：The cooling pipe Relieve heat mouth is equipped on the nozzle in road.