Injection molding machine energy consumption test nozzle

Abstract

The utility model relates to injection molding machine technical field, and disclose injection molding machine energy consumption test nozzle, including regulating valve body, the inside regulating valve body is provided with a through horizontal channel, one end connects injection molding machine material pipe, the other end connects spring type closing device, the inside regulating valve body still is provided with a longitudinal circular passageway through, the regulating valve body top is provided with hollow limiting screw. This injection molding machine energy consumption test nozzle adopts the closing device of normally closed spring drive, need not external gas source, hydraulic source and electric control system, and the installation is convenient and the use cost is low, and simultaneously cooperate hollow limiting screw, pre -tightening nut and ring groove anti -overpressure structure, can effectively limit the adjustment stroke, avoid the internal overpressure damage part that flow channel is completely closed, and the overall safety is high, and the running stability is good, can establish the injection pressure needed for detection accurately, and the energy consumption test measurement precision is improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, specifically to an injection molding machine energy consumption testing nozzle. Background Technology

[0002] With the continuous development of injection molding technology, the industry's requirements for controlling the energy consumption of injection molding machines are constantly increasing, and the demand for energy consumption performance testing of injection molding machines is becoming increasingly urgent. According to the current national standard GB / T30200-2013 "Energy Consumption Test Method for Rubber and Plastic Injection Molding Machines", a closed nozzle structure must be used in the energy consumption testing process of injection molding machines to avoid melt drooling. However, at present, there is no dedicated nozzle structure design that meets the requirements of this national standard.

[0003] At present, a dedicated nozzle structure suitable for energy consumption testing of injection molding machines has not yet been developed. During the energy consumption testing of injection molding machines, the equipment needs to complete the material plasticization operation under a specific back pressure of 5MPa. This working condition requires the nozzle to be in a closed state. At the same time, the testing process needs to establish a specific injection pressure, which needs to be formed under the condition of sufficient fluid resistance. The above resistance can be achieved by relying on the adjustment structure recorded in the national standard.

[0004] However, the reference test device provided by the national standard does not have a corresponding safety protection structure, which may lead to safety hazards such as parts coming loose or falling out during use. At the same time, the national standard only proposes that the test nozzle should be equipped with an adjustable structure and a closing component, without providing a specific and feasible structural solution. If the nozzle closing structure is not used for testing, it will directly cause deviation in the accuracy of material metering, resulting in a higher actual energy consumption value and ultimately interfering with the accuracy of the overall energy consumption rating of the injection molding machine. Utility Model Content

[0005] The purpose of this invention is to provide an energy consumption testing nozzle for injection molding machines to solve the technical problems existing in the background art. This nozzle is safe, reliable, accurate in measurement, and easy to use, filling the market gap for related special equipment.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an injection molding machine energy consumption test nozzle, including an adjusting valve body. The adjusting valve body has a through-passage, one end of which is connected to the injection molding machine material tube, and the other end is connected to a spring-loaded closing device. The adjusting valve body also has a through-passage longitudinal circular channel. A hollow limiting screw is provided above the adjusting valve body, and the hollow limiting screw is threadedly connected to the adjusting valve body. An adjusting screw is provided in the longitudinal circular channel, and the middle part of the adjusting screw and the internal thread of the hollow limiting screw form a threaded pair. Rotating the adjusting screw can move it up and down, and the end of the adjusting screw and the hollow limiting screw form a limit. The upper part of the adjusting screw is provided with a thread, which cooperates with the pre-tightening nut to lock the position of the adjusting screw.

[0007] Preferably, the upper end of the hollow limiting screw is provided with a hexagonal protrusion for tightening.

[0008] Preferably, the lower end of the adjusting screw forms a gap seal with the inner hole of the adjusting valve body, with a gap of 0.01-0.03mm.

[0009] Preferably, the bottom end of the adjusting screw is connected to a plug, and an annular groove is provided below the adjusting screw to prevent internal overpressure caused by complete closure of the channel.

[0010] Preferably, the adjusting screw has a hexagonal protrusion at its tip for rotating the adjusting screw.

[0011] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0012] First, this utility model adopts a normally closed spring-driven closing device, which does not require an external air source, hydraulic source, or electrical control system, making it easy to install and low in operating costs. At the same time, with the hollow limit screw, pre-tightening nut, and annular groove anti-overpressure structure, it can effectively limit the adjustment stroke and avoid internal overpressure damage to parts caused by complete closure of the flow channel. It has high overall safety and good operational stability, and can accurately establish the injection pressure required for testing, significantly improving the measurement accuracy of energy consumption testing.

[0013] Secondly, the present invention adopts a through-hole structure for the regulating valve body, which effectively reduces the difficulty of precision machining of parts and production costs. The overall structure design is reasonable, filling the technical gap in the existing technology of special nozzles for energy consumption testing of injection molding machines, and can meet the national standard testing requirements. Attached Figure Description

[0014] Figure 1 This is a main sectional view of the structure of this utility model;

[0015] Figure 2 This is a side view of the present invention;

[0016] Figure 3This is a detailed drawing of the adjusting screw of this utility model.

[0017] The components include: 1. regulating valve body; 2. spring-loaded closing device; 10. adjusting screw; 101. annular groove; 11. plug; 12. hollow limit screw; and 13. preload nut. Detailed Implementation

[0018] 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 protection scope of the present utility model.

[0019] Please see Figure 1-3 The injection molding machine energy consumption test nozzle is arranged with an adjustment device and a closing device in sequence in the plastic flow path during injection. The closing device adopts a normally closed spring-driven nozzle structure, which is automatically opened by the injection pressure of the injection molding machine. It does not require a matching pneumatic air source, hydraulic power source, or external electrical control system and control signal. It has a high degree of structural integration, is easy to assemble, and has low operating costs. Compared with the traditional pneumatic, hydraulic, and electric driven closing structure, it has significant economic and practical advantages. At the same time, the spring-type closing device of this solution can be replaced with various spring nozzles with different structures according to the actual testing conditions, making it more adaptable. The safety of the adjustment device is crucial. The design uses a hollow limit screw 12, which is fixed on the regulating valve body 1. The adjusting screw 10 is screwed on the hollow limit screw 12. During adjustment, the adjusting screw 10 is restricted to a safe position. A pre-tightening nut 13 is set on the adjusting screw 10 to fix the position of the adjusting screw 10. A small annular groove is provided at the bottom of the adjusting screw 10 to ensure that the adjusting device cannot be completely closed, thus avoiding operation of the adjusting screw 10 when it is completely closed, which could damage the adjusting screw 10, the adjusting valve body 1, and the hollow limit screw 12.

[0020] Specifically, the regulating valve body 1 has a transverse flow channel and a longitudinal circular through hole inside. One end of the transverse channel is connected to the injection molding machine material tube, and the other end is connected to the spring-type closing device 2. The longitudinal circular channel is a fully through high-precision through hole. The overall structure is easy to be precision machined and formed, which effectively reduces the processing difficulty and processing cost. The upper end of the regulating valve body 1 is threaded with a hollow limit screw 12. The top of the hollow limit screw 12 is machined into a hexagonal shape, which is convenient for tool clamping and tightening assembly.

[0021] Specifically, the lower end of the adjusting screw 10 extends into the longitudinal through hole of the regulating valve body 1, and the middle part of the adjusting screw 10 forms a threaded transmission pair with the inner thread of the hollow limit screw 12. By rotating the adjusting screw 10, its axial up and down displacement can be adjusted, and the end of the adjusting screw 10 forms an axial limit with the hollow limit screw 12 to prevent the adjustment stroke from exceeding the limit. The upper external thread of the adjusting screw 10 is fitted with a preload nut 13. After the position of the adjusting screw 10 is adjusted, it is locked and fixed by the preload nut 13 to prevent position displacement during operation.

[0022] Specifically, the lower outer wall of the adjusting screw 10 and the inner wall of the longitudinal through hole inside the regulating valve body 1 form a gap sealing structure. The gap between the two is controlled at 0.01~0.03mm, which can effectively prevent melt leakage while ensuring smooth adjustment. A plug 11 is provided at the bottom of the adjusting screw 10, and an annular groove 101 is machined on the rod of the adjusting screw 10. The annular groove 101 can form a permanent pressure relief channel to ensure that the internal flow channel cannot be completely sealed, avoid abnormal increase in internal pressure of the melt, and also avoid damage to parts caused by operating the adjusting screw 10 when internal overpressure occurs. A hexagonal operating boss is machined at the top of the adjusting screw 10, which makes it easy for the operator to rotate and adjust with tools.

[0023] Specifically, during actual injection molding machine energy consumption testing, the operator rotates the adjusting screw 10 at the hexagonal end and adjusts it to the preset height position. When the adjusting screw 10 is rotated to the highest position, the internal flow channel is fully open. According to the national standard testing requirements, the axial position of the adjusting screw 10 is gradually adjusted to change the internal fluid resistance. After the injection pressure reaches the pressure value specified by the testing standard, the energy consumption data is collected and tested under stable operating conditions. The entire testing process relies on the spring-type closing device 2 to achieve automatic opening and closing. The structure operates stably, and the test data is accurate and reliable.

[0024] During use, the melt enters the transverse channel inside the regulating valve body 1 from the injection molding machine's feed pipe, and then flows to the spring-loaded closing device 2. Initially, the spring-loaded closing device 2 is normally closed, effectively preventing melt drooling and meeting the specific back pressure plasticizing requirements under national standard testing conditions. When the injection molding machine builds up injection pressure, the pressure opens the spring-loaded closing device 2, allowing the nozzle to open and discharge material. The hollow limit screw 12 installed on the regulating valve body 1 provides axial travel limit to the adjusting screw 10, limiting the vertical adjustment range of the adjusting screw 10 and improving the safety of the adjusting structure. Rotating the hexagonal part at the top of the adjusting screw 10 causes the adjusting screw 10 to move up and down along the longitudinal channel via the threaded transmission. This alters the cross-sectional area of ​​the internal flow channel, thereby constructing the fluid resistance required for testing and establishing the standard injection pressure. After the position adjustment is completed, tighten the preload nut 13 to lock and fix the adjusting screw 10. The lower end of the adjusting screw 10 maintains a 0.01~0.03mm gap seal with the inner hole of the regulating valve body 1, balancing sealing performance and adjustment flexibility. At the same time, the annular groove 101 on the adjusting screw 10 can form a constant pressure relief path, preventing internal overpressure caused by complete closure of the flow channel and avoiding damage to the adjusting structure under high pressure. Once the flow channel resistance and injection pressure meet the energy consumption test standard parameters, the equipment can operate stably and the injection molding machine energy consumption test can be carried out.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection molding machine energy consumption testing nozzle, including an adjusting valve body (1), characterized in that: The regulating valve body (1) has a through-passage inside, one end of which is connected to the injection molding machine material tube, and the other end is connected to the spring-type closing device (2). The regulating valve body (1) also has a through-passage longitudinal circular channel. A hollow limit screw (12) is provided above the regulating valve body (1), and the hollow limit screw (12) is connected to the regulating valve body (1) by a thread. An adjusting screw (10) is provided in the longitudinal circular channel, and the middle part of the adjusting screw (10) and the internal thread of the hollow limit screw (12) form a thread pair. The adjusting screw (10) can be moved up and down by rotating it, and the end of the adjusting screw (10) and the hollow limit screw (12) form a limit. The upper part of the adjusting screw (10) is provided with a thread, which cooperates with the pre-tightening nut (13) to lock the position of the adjusting screw (10).

2. The injection molding machine energy consumption testing nozzle according to claim 1, characterized in that: The hollow limiting screw (12) has a hexagonal protrusion on its upper end for tightening.

3. The injection molding machine energy consumption testing nozzle according to claim 1, characterized in that: The lower end of the adjusting screw (10) forms a gap seal with the inner hole of the adjusting valve body (1), with a gap of 0.01-0.03mm.

4. The injection molding machine energy consumption testing nozzle according to claim 1, characterized in that: The bottom end of the adjusting screw (10) is connected to a plug (11), and an annular groove (101) is provided below the adjusting screw (10) to prevent internal overpressure caused by complete closure of the channel.

5. The injection molding machine energy consumption testing nozzle according to claim 1, characterized in that: The adjusting screw (10) has a hexagonal protrusion at its top for rotating the adjusting screw (10).

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