An on-line nitrogen charging device for injection molding machines

Abstract

The utility model discloses an online nitrogen gas filling device of injection molding machine, include: nitrogen gas supply mechanism, and it is through the gas pipe butt joint injection molding machine, connector subassembly is used for butt joint gas pipe, including inner positioning pipe, outer positioning pipe, and the end of gas pipe is inserted into the gap between inner positioning pipe, outer positioning pipe, and the opposite surface of inner positioning pipe, outer positioning pipe sets up first ball groove, second ball groove respectively, and the ball is embedded and rolled in two kinds of ball grooves respectively and sets up, and two kinds of balls butt joint on the inner wall, outer wall of gas pipe respectively, a plurality of locking parts, and it is through the elastic band and is elastically associated and is overall set on outer positioning pipe, and the pressure block structure of its inner end surface passes through the through -hole of outer positioning pipe and butt joint on the surface of gas pipe. The utility model can solve the problem that the structure of gas pipe and connector subassembly is worn seriously when the existing nitrogen gas supply device is assembled, and the assembly operation is laborious, and the butt joint compactness, stability is insufficient, and there is the problem of gas leakage.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, specifically to an online nitrogen filling device for injection molding machines. Background Technology

[0002] Injection molding machines, also known as injection molding machines or injection molding machines, are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics through plastic molds. They are classified as vertical, horizontal, and all-electric. Injection molding machines heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity. The working principle of an injection molding machine is similar to that of a syringe; it uses the thrust of a screw (or plunger) to inject the plasticized molten plastic (i.e., viscous flow state) into a closed mold cavity, where it solidifies and sets to obtain the finished product. Injection molding is a cyclical process, with each cycle mainly including: metered feeding - melting and plasticizing - pressure injection - mold filling and cooling - mold opening and part removal. After the plastic part is removed, the mold is closed again for the next cycle. Nitrogen gas is introduced into the injection molding machine during operation to achieve effects such as air removal from the injection molding cavity, assisting in the shaping of the injection molded part, cooling the injection molded part, and protection. The gas pressure, flow rate, and other parameters of the supplied nitrogen play a crucial role in the injection molding quality and efficiency. The existing nitrogen supply device connects to the flow structure inside the injection molding machine through several air pipes. During assembly, the air pipes need to be twisted repeatedly to fit onto the connector assembly, which causes severe wear between the structures. The assembly operation is laborious and inconvenient, and the tightness and stability of the connection are insufficient, resulting in air leakage. Utility Model Content

[0003] The purpose of this utility model is to provide an online nitrogen filling device for injection molding machines to solve the problems of severe wear between the gas pipe and the connector assembly during the assembly of existing nitrogen supply devices, which makes the assembly operation laborious and inconvenient, and the lack of tightness and stability of the connection, resulting in air leakage.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: an online nitrogen filling device for injection molding machines, comprising:

[0005] The nitrogen supply system connects to the injection molding machine via a gas pipe.

[0006] A connector assembly, which is disposed on the nitrogen supply mechanism and / or injection molding machine and used to connect the air pipe, includes an inner positioning tube and an outer positioning tube. The end of the air pipe is inserted into the gap between the inner positioning tube and the outer positioning tube. The opposing surfaces of the inner positioning tube and the outer positioning tube are respectively provided with a first ball groove and a second ball groove. A first ball is embedded in the first ball groove and rolls, and a second ball is embedded in the second ball groove and rolls. The first ball and the second ball abut against the inner wall and the outer wall of the air pipe, respectively.

[0007] Several locking components are elastically connected by an elastic band and are integrally sleeved on the outer positioning tube. The pressure block structure on the inner end face of the locking components passes through the through hole of the outer positioning tube and abuts against the surface of the air tube.

[0008] As a further description of the above technical solution:

[0009] The first ball bearing and the second ball bearing are arranged alternately and in staggered layers along the axial direction of the air tube.

[0010] As a further description of the above technical solution:

[0011] The first ball and the second ball are respectively arranged in a plurality of spaces along the circumferential direction of the inner positioning tube and the outer positioning tube.

[0012] As a further description of the above technical solution:

[0013] The pressure block structure includes a first pressure block and a second pressure block. The first pressure block is located outside the inner positioning tube and cooperates with the arc-shaped outer surface of the inner positioning tube to radially clamp the end of the trachea. The second pressure block is located at the end face of the inner positioning tube and cooperates with the end face of the inner positioning tube to axially clamp the end of the trachea.

[0014] As a further description of the above technical solution:

[0015] The surface of the outer positioning tube is provided with a first positioning groove, and the locking member can be radially slidably embedded into the first positioning groove.

[0016] As a further description of the above technical solution:

[0017] The surface of the outer positioning tube is also provided with a second positioning groove that communicates with the first positioning groove, and the elastic band is embedded in the second positioning groove.

[0018] In summary, by adopting the above technical solution, this utility model has the following advantages over the prior art:

[0019] Beneficial effects:

[0020] This utility model's online nitrogen filling device for injection molding machines involves holding the end of the air pipe and inserting it into the gap between the inner and outer positioning tubes during the connection of the air pipe and the connector assembly. During this process, the first and second ball bearings abut against the inner and outer walls of the air pipe, respectively, and roll along the ball bearing grooves under frictional force. This reduces the insertion and connection resistance between the air pipe and the connector tube, making operation more labor-saving and convenient, and reducing wear between structures. The first and second pressure blocks on the locking component abut and position the air pipe partially on the outer side of the two types of ball bearings, achieving multi-directional radial and axial clamping and positioning of the air pipe. This ensures the positioning strength of the air pipe on the connector assembly, preventing loosening and air leakage. The elastic pre-tightening force applied by the elastic band achieves stable compression of the air pipe by the pressure blocks, working in conjunction with the inner positioning tube for clamping and positioning. The locking component and elastic band are embedded in the positioning groove to prevent structural displacement and loosening. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the docking structure between an online nitrogen filling device for an injection molding machine and the injection molding machine.

[0023] Figure 2 This is a schematic diagram of the connection structure between the connector assembly, locking element, and air pipe in an online nitrogen filling device for an injection molding machine.

[0024] Figure 3 This is a schematic diagram of the structure of the outer positioning tube in an online nitrogen filling device for an injection molding machine.

[0025] Legend:

[0026] 1. Nitrogen supply mechanism; 2. Inner positioning tube; 21. First ball groove; 22. First ball; 3. Outer positioning tube; 31. Second ball groove; 32. Second ball; 33. Through hole; 34. First positioning groove; 35. Second positioning groove; 4. Locking element; 41. First pressure block; 42. Second pressure block; 5. Elastic band; 100. Injection molding machine; 110. Air pipe. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Please see Figure 1-3 This utility model provides a technical solution: an online nitrogen filling device for injection molding machines, comprising:

[0030] Nitrogen supply mechanism 1 is connected to injection molding machine 100 via gas pipe 110;

[0031] A connector assembly, which is disposed on the nitrogen supply mechanism 1 and / or injection molding machine 100 and used to connect to the air pipe 110, includes an inner positioning tube 2 and an outer positioning tube 3. The end of the air pipe 110 is inserted into the gap between the inner positioning tube 2 and the outer positioning tube 3. The opposing surfaces of the inner positioning tube 2 and the outer positioning tube 3 are respectively provided with a first ball groove 21 and a second ball groove 31. A first ball 22 is embedded in and rolls in the first ball groove 21, and a second ball 32 is embedded in and rolls in the second ball groove 31. The first ball 22 and the second ball 32 abut against the inner wall and the outer wall of the air pipe 110, respectively.

[0032] Several locking elements 4 are elastically connected by elastic bands 5 and are integrally sleeved on the outer positioning tube 3. The pressure block structure on the inner end face of the locking element passes through the through hole 33 of the outer positioning tube 3 and abuts against the surface of the air pipe 110.

[0033] The first ball bearing 22 and the second ball bearing 32 are arranged alternately and in staggered layers along the axial direction of the air tube 110. Several of the first ball bearing 22 and the second ball bearing 32 are spaced circumferentially along the surfaces of the inner positioning tube 2 and the outer positioning tube 3, respectively. This reduces the resistance when the end of the air tube 110 is inserted into or fitted with the inner and outer positioning tubes. Simultaneously, the inner and outer ball bearings cause the local longitudinal section of the air tube 110 to be wavy when pressed into the gap between the inner and outer positioning tubes, resulting in a tight fit and thus achieving initial positioning of the end of the air tube 110.

[0034] The clamping block structure includes a first clamping block 41 and a second clamping block 42. The first clamping block 41 is located outside the inner positioning tube 2, and its arc-shaped outer surface cooperates with the inner positioning tube 2 to radially clamp the end of the air tube 110. The second clamping block 42 is located at the end face of the inner positioning tube 2, and its end face cooperates with the inner positioning tube 2 to axially clamp the end of the air tube 110. By using the first clamping block 41 and the second clamping block 42 to partially abut and position the air tube 110 on the outside of the two types of ball bearings, it is possible to achieve multi-directional clamping and positioning of the air tube 110 in both radial and axial directions, thereby ensuring the positioning strength of the air tube 110 on the connector assembly and preventing it from loosening and causing air leakage.

[0035] The surface of the outer positioning tube 3 is provided with a first positioning groove 34, and the locking member 4 is radially slidably embedded in the first positioning groove 34. The surface of the outer positioning tube 3 is also provided with a second positioning groove 35 communicating with the first positioning groove 34, and the elastic band 5 is embedded in the second positioning groove 35. This ensures the stability of the positioning of the locking member 4 and the elastic band 5 after the air pipe 110 is assembled, and avoids their displacement, which would cause the end of the air pipe 110 to loosen, thereby causing air leakage between the end of the air pipe 110 and the equipment joint.

[0036] The working principle of the online nitrogen filling device for an injection molding machine according to this embodiment includes: When connecting the air pipe 110 to the connector assembly, hold the end of the air pipe 110 and insert it into the gap between the inner and outer positioning tubes. During this process, the first ball 22 and the second ball 32 abut against the inner and outer walls of the air pipe 110 respectively, and roll along the ball groove under the action of friction, thereby reducing the insertion and connection resistance between the air pipe and the connector tube, making the operation more labor-saving and convenient, and reducing wear between structures. Then, hold the locking member 4 and press it against the outer positioning tube 3, so that the first pressure block 41 and the second pressure block 42 pass through the through hole 33 and abut against the air pipe 110. The elastic pre-tightening force applied by the elastic band 5 realizes the stable compression of the air pipe by the pressure block, which, together with the inner positioning tube 2, achieves clamping and positioning. The locking member 4 and the elastic band 5 are embedded in the positioning groove to prevent structural displacement and loosening. A sealing ring can be set between the inner and outer positioning tubes and the air pipe 110 to further ensure the airtightness of the connection.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An online nitrogen filling device for an injection molding machine, characterized in that, include: The nitrogen supply system connects to the injection molding machine via a gas pipe. A connector assembly, which is disposed on the nitrogen supply mechanism and / or injection molding machine and used to connect the air pipe, includes an inner positioning tube and an outer positioning tube. The end of the air pipe is inserted into the gap between the inner positioning tube and the outer positioning tube. The opposing surfaces of the inner positioning tube and the outer positioning tube are respectively provided with a first ball groove and a second ball groove. A first ball is embedded in the first ball groove and rolls, and a second ball is embedded in the second ball groove and rolls. The first ball and the second ball abut against the inner wall and the outer wall of the air pipe, respectively. Several locking components are elastically connected by an elastic band and are integrally sleeved on the outer positioning tube. The pressure block structure on the inner end face of the locking components passes through the through hole of the outer positioning tube and abuts against the surface of the air tube.

2. The online nitrogen filling device for an injection molding machine according to claim 1, characterized in that, The first ball bearing and the second ball bearing are arranged alternately and in staggered layers along the axial direction of the air tube.

3. The online nitrogen filling device for an injection molding machine according to claim 1, characterized in that, The first ball and the second ball are respectively arranged in a plurality of spaces along the circumferential direction of the inner positioning tube and the outer positioning tube.

4. The online nitrogen filling device for an injection molding machine according to claim 1, characterized in that, The pressure block structure includes a first pressure block and a second pressure block. The first pressure block is located outside the inner positioning tube and cooperates with the arc-shaped outer surface of the inner positioning tube to radially clamp the end of the trachea. The second pressure block is located at the end face of the inner positioning tube and cooperates with the end face of the inner positioning tube to axially clamp the end of the trachea.

5. The online nitrogen filling device for an injection molding machine according to claim 1, characterized in that, The surface of the outer positioning tube is provided with a first positioning groove, and the locking member can be radially slidably embedded into the first positioning groove.

6. The online nitrogen filling device for an injection molding machine according to claim 5, characterized in that, The surface of the outer positioning tube is also provided with a second positioning groove that communicates with the first positioning groove, and the elastic band is embedded in the second positioning groove.

Images