Connecting device for injection of injection mold

Abstract

The utility model relates to the technical field of injection molds, and discloses a connecting device for injection of an injection mold, which comprises an injection nozzle communicated with an injection molding machine and a connecting cylinder communicated with an injection molding cavity in the mold, the inner side of the connecting cylinder is fixedly connected with a fixing ring, the side wall of the fixing ring far away from an injection molding runner of the mold is provided with a clamping groove, and the clamping groove is communicated with the injection molding nozzle. The injection nozzle is fixedly sleeved with a connecting ring, the side wall of the connecting ring is fixedly connected with a clamping block matched with the clamping groove, the outer side of the clamping block is fixedly sleeved with an outer rubber ring, an inner rubber ring is fixed to the inner side of the clamping block, and an inflation assembly used for enabling the inner rubber ring and the outer rubber ring to expand is arranged in the connecting ring. According to the connecting device for injection of the injection mold, raw materials are effectively prevented from leaking, so that the quantity of the raw materials entering the mold is the same, the consistency and the reliability of manufacturing plastic products are ensured, and the production cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection connection device for an injection mold. Background Art

[0002] Mold injection molding is a processing method used in mass production of certain complex-shaped parts. The heated and melted plastic raw materials are pushed by the injection molding machine screw under high pressure into the mold cavity of the plastic mold. After cooling and solidification, the plastic molded product is obtained. The plastic mold consists of two parts, the movable mold and the fixed mold. When the mold is opened, the movable mold and the fixed mold are separated to take out the plastic product.

[0003] Injection molds in the prior art are generally used in conjunction with injection molding machines. The injection nozzle on the injection molding machine is connected to the gate on the mold. When the injection molding machine squeezes the internal molten plastic into the mold and the mold is closed and opened, the machine will vibrate. This vibration causes the connection between the injection nozzle and the gate to be squeezed against each other, thereby squeezing the sealing ring at the connection. At the same time, during the injection molding process, the molten plastic will also squeeze the sealing ring. After a period of injection molding, the sealing ring at the connection is prone to deformation and dislocation, thereby reducing the sealing performance of the connection. In this way, plastic with a certain pressure may cause leakage of raw materials when squeezing the connection, which will cause fluctuations in the processing quality of plastic products, affect the consistency and reliability of the products, and also cause waste of raw materials, increase production costs and maintenance costs.

[0004] Therefore, it is necessary to design a connection device for injection of an injection mold to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and provides an injection mold injection connection device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A connection device for injection of an injection mold, comprising an injection nozzle connected to an injection molding machine, and also comprising a connection cylinder connected to an injection cavity in the mold, a fixing ring is fixedly connected to the inner side of the connection cylinder, a groove is provided on the side wall of the fixing ring away from the injection flow channel of the mold, a connecting ring is provided on the fixed sleeve on the injection nozzle, a clamping block adapted to the groove is fixedly connected to the side wall of the connecting ring, an outer fixing sleeve of the clamping block is provided with an outer rubber ring, an inner rubber ring is fixed to the inner side of the clamping block, and an inflation component for expanding the inner rubber ring and the outer rubber ring is provided inside the connecting ring.

[0008] As a preferred technical solution of the utility model, the inflation component includes a control chamber embedded in a connecting ring, the interior of the control chamber is sealed and slidably connected with a sliding plug, the interiors of the inner rubber ring and the outer rubber ring are both hollow, and the connecting ring is provided with a connecting pipe connected to the control chamber, and the connecting pipe is respectively connected to the outer rubber ring and the inner rubber ring, and the inflation component also includes a driving member, which is used to control the movement of the sliding plug.

[0009] As a preferred technical solution of the utility model, the driving member includes a push plate slidably mounted on the injection nozzle, a plurality of push rods are fixedly connected to the push plate, one end of the push rod away from the push plate extends to the interior of the control chamber, and the push rod is fixedly connected to the sliding plug, and a plurality of springs are arranged between the push plate and the connecting ring.

[0010] As a preferred technical solution of the present invention, the interior of the control cavity is filled with coolant.

[0011] As a preferred technical solution of the utility model, all the push rods are distributed at equal intervals in the circumferential direction, and the spring sleeves are arranged on the push rods.

[0012] As a preferred technical solution of the utility model, the outer rubber ring and the inner rubber ring are both made of fluororubber.

[0013] The utility model has the following beneficial effects:

[0014] 1. Improve sealing performance: Through the cooperation of the card slot and the card block, as well as the filling effect of the inner and outer rubber rings, the contact area between the injection nozzle and the connecting tube is increased, and the possible gaps are filled, thereby improving the sealing performance of the device, effectively preventing the leakage of raw materials, and then making the amount of raw materials entering the mold the same, ensuring the consistency and reliability of the production of plastic products, and ensuring the quality of plastic products;

[0015] 2. Automatic compensation function: When the inner and outer rubber rings become loose due to mechanical operation, the push plate can automatically apply pressure to the direction of the connecting ring under the action of the spring, and inflate the inner and outer rubber rings by controlling the air in the cavity to fill the gap in time, thereby ensuring the sealing performance, avoiding leakage and waste of raw materials, reducing the number of replacement times of the sealing device, and saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of an injection connection device for an injection mold proposed by the utility model;

[0017] Figure 2 It is a schematic diagram of the internal structure of the injection nozzle and the connecting tube;

[0018] Figure 3 for Figure 2A magnified view of the structure at A;

[0019] Figure 4 Schematic diagram of the three-dimensional structure of the injection nozzle.

[0020] In the figure: 1 injection nozzle, 2 connecting tube, 3 fixing ring, 4 clamping groove, 5 connecting ring, 6 clamping block, 7 outer rubber ring, 8 inner rubber ring, 9 connecting tube, 10 control chamber, 11 sliding plug, 12 push rod, 13 push plate, 14 spring, 15 coolant. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-4 A connection device for injection of an injection mold comprises an injection nozzle 1 connected to an injection molding machine, and also comprises a connection tube 2 connected to an injection cavity in the mold, a fixing ring 3 is fixedly connected to the inner side of the connection tube 2, a groove 4 is arranged on the side wall of the fixing ring 3 away from the injection flow channel of the mold, a connecting ring 5 is fixedly provided on the fixed sleeve of the injection nozzle 1, a block 6 adapted to the groove 4 is fixedly connected to the side wall of the connecting ring 5, the cooperation of the groove 4 and the block 6 increases the contact area between the injection nozzle 1 and the connection tube 2, and improves the sealing performance of the device, an outer fixed sleeve of the block 6 is provided with an outer rubber ring 7, an inner rubber ring 8 is fixed to the inner side of the block 6, the outer rubber ring 7 and the inner rubber ring 8 can fill the gap between the groove 4 and the block 6, and an inflatable component for expanding the inner rubber ring 8 and the outer rubber ring 7 is arranged inside the connection ring 5.

[0023] Reference Figure 2 and Figure 3 The inflation component includes a control chamber 10 embedded in the connecting ring 5, and the control chamber 10 is sealed and slidably connected with a sliding plug 11. The longitudinal sections of the control chamber 10 and the sliding plug 11 are both annular structures. The interiors of the inner rubber ring 8 and the outer rubber ring 7 are both hollow. The connecting ring 5 is provided with a connecting pipe 9 connected to the control chamber 10, and the connecting pipe 9 is respectively connected to the outer rubber ring 7 and the inner rubber ring 8. The inflation component also includes a driving member, which is used to control the movement of the sliding plug 11.

[0024] Reference Figure 2 and Figure 3The driving member includes a push plate 13 slidably mounted on the injection nozzle 1, and a plurality of push rods 12 are fixedly connected to the push plate 13. One end of the push rod 12 away from the push plate 13 extends to the inside of the control chamber 10, and the push rod 12 is fixedly connected to the sliding plug 11. A plurality of springs 14 are arranged between the push plate 13 and the connecting ring 5. Under the elastic force of the spring 14, the push plate 13 always generates a thrust on the sliding plug 11. When there is a gap between the card block 6 and the card slot 4, the air in the control chamber 10 can be timely replenished to the inside of the inner rubber ring 8 and the outer rubber ring 7 to ensure the sealing performance of the device.

[0025] Reference Figure 3 The control cavity 10 is filled with a coolant 15, which can cool the inner rubber ring 8 and the outer rubber ring 7, thereby reducing the high temperature effect on the inner rubber ring 8 and the outer rubber ring 7 during the injection molding process and extending the service life of the device.

[0026] Reference Figure 4 All the push rods 12 are distributed at equal intervals in the circumferential direction, and the springs 14 are sleeved on the push rods 12, so that the sliding plug 11 can be evenly stressed, thereby ensuring the stability of the movement of the sliding plug 11.

[0027] Reference Figure 4 The outer rubber ring 7 and the inner rubber ring 8 are both made of fluororubber. Fluororubber has excellent high temperature resistance and chemical resistance, can maintain good elasticity and sealing in high temperature environment, and secondly has good wear resistance and aging resistance, can maintain its sealing performance for a long time, and reduces the frequency of replacement of sealing rings and maintenance costs.

[0028] The specific working principle of the utility model is as follows:

[0029] During installation, the staff controls the injection molding machine to move so that the injection nozzle 1 is inserted into the interior of the connecting tube 2, and at the same time, the block 6, the inner rubber ring 8 and the outer rubber ring 7 can be inserted into the interior of the slot 4 together. The cooperation of the slot 4 and the block 6 increases the contact area between the injection nozzle 1 and the connecting tube 2, and improves the sealing performance of the connection between the two. At the same time, the inner rubber ring 8 and the outer rubber ring 7 can fill the gap between the injection nozzle 1 and the connecting tube 2, thereby further improving the sealing performance of the device and ensuring the stability of the device structure. When the inner rubber ring 8 and the outer rubber ring 7 are in mechanical operation, the inner rubber ring 8 and the outer rubber ring 7 are in mechanical operation. When looseness occurs under vibration operation, the push plate 13 can move toward the connecting ring 5 under the elastic force of the spring 14, so that the push rod 12 and the sliding plug 11 move together, and the sliding plug 11 can squeeze the air in the control chamber 10 into the inner rubber ring 8 and the outer rubber ring 7 through the connecting pipe 9, so that the inner rubber ring 8 and the outer rubber ring 7 are inflated, and then the gap between the injection nozzle 1 and the connecting tube 2 is filled in time, so as to ensure the sealing of the device, prevent the leakage of raw materials from affecting the quality of plastic products, and also prevent the waste of raw materials, thereby reducing production and maintenance costs;

[0030] It is worth mentioning that the coolant 15 can be introduced into the control chamber 10. Under the action of the spring 14, the sliding plug 11 can squeeze the coolant 15 into the inner rubber ring 8 and the outer rubber ring 7 to cool them. This can slow down the aging speed of the inner rubber ring 8 and the outer rubber ring 7, reduce the risk of wear and damage, extend their service life and maintain elasticity and sealing performance.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A connection device for injection molding, comprising an injection nozzle (1) connected to an injection molding machine, and a connection cylinder (2) connected to an injection molding cavity in a mold, characterized in that: A fixing ring (3) is fixedly connected to the inner side of the connecting tube (2); a groove (4) is provided on the side wall of the fixing ring (3) away from the injection channel of the mold; a connecting ring (5) is fixedly provided on the upper fixed sleeve of the injection nozzle (1); a clamping block (6) matched with the groove (4) is fixedly connected to the side wall of the connecting ring (5); an outer fixing sleeve of the clamping block (6) is provided with an outer rubber ring (7); an inner rubber ring (8) is fixedly provided on the inner side of the clamping block (6); and an inflation component for inflating the inner rubber ring (8) and the outer rubber ring (7) is provided inside the connecting ring (5).

2. The connection device for injection molding according to claim 1, characterized in that: The inflation component comprises a control chamber (10) embedded in a connecting ring (5); the interior of the control chamber (10) is sealed and slidably connected to a sliding plug (11); the interiors of the inner rubber ring (8) and the outer rubber ring (7) are both hollow; a connecting pipe (9) connected to the control chamber (10) is provided on the connecting ring (5); the connecting pipe (9) is respectively connected to the outer rubber ring (7) and the inner rubber ring (8); the inflation component also comprises a driving member, which is used to control the movement of the sliding plug (11).

3. The connection device for injection molding according to claim 2, characterized in that: The driving member comprises a push plate (13) slidably mounted on the injection nozzle (1), a plurality of push rods (12) being fixedly connected to the push plate (13), one end of the push rod (12) away from the push plate (13) extending into the interior of the control chamber (10), and the push rod (12) being fixedly connected to the sliding plug (11), and a plurality of springs (14) being arranged between the push plate (13) and the connecting ring (5).

4. The connection device for injection molding according to claim 2, characterized in that: The interior of the control chamber (10) is filled with cooling liquid (15).

5. The connection device for injection molding according to claim 3, characterized in that: All the push rods (12) are distributed at equal intervals in the circumferential direction, and the springs (14) are sleeved on the push rods (12).

6. The connection device for injection molding according to claim 1, characterized in that: The outer rubber ring (7) and the inner rubber ring (8) are both made of fluororubber.

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