Nozzle contact force detection and adjustment device for electric injection shifting injection molding machine

Abstract

The invention discloses a nozzle contact force detection adjusting device for an electric injection molding machine, which comprises two linear guide rails, a sliding table is erected on the linear guide rails, the sliding table is in sliding connection with the linear guide rails, the bottom of the sliding table is provided with an injection assembly, the injection assembly comprises a band-type brake motor and a screw rod, the screw rod is sleeved with a connecting assembly and a nut, and the connecting assembly is connected with the screw rod. The connecting assembly comprises an elastic seat and a guide rod, the elastic seat comprises a first connecting plate and a second connecting plate, one end of the nut and one end of the guide rod are connected with one side of the first connecting plate, the other side of the first connecting plate is elastically connected with the second connecting plate, avoiding holes are formed in the first connecting plate and the second connecting plate, and a proximity switch is arranged at the end of the second connecting plate. The proximity switch is electrically connected with the band-type brake motor, one end of the connecting plate is connected with a fixing plate, the fixing plate is provided with scale marks and an induction contact piece corresponding to the proximity switch, and the induction contact piece is connected with the fixing plate in a sliding mode in the scale mark direction. The nozzle has the beneficial effect that the contact force of the nozzle can be adjusted according to the actual situation.

Description

Technical Field

[0001] The present invention relates to the technical field related to electric shot-shifting, and in particular to a nozzle contact force detection and adjustment device for an electric shot-shifting injection molding machine. Background Art

[0002] Injection molding uses the thermophysical properties of plasticity to add materials from the hopper into the barrel, and the oil heating ring outside the barrel heats the material to melt it. Under the action of the screw, the material rotates while retreating under the reaction force of the material. After plasticization, the injection hydraulic cylinder drives the injection device forward to fit the nozzle with the mold, injecting the molten plastic into the mold cavity to complete the entire molding action.

[0003] In the current fully automatic injection molding machine, during the long injection process, the relative movement of the screw nut and the screw will cause the screw nut and the screw surface to rise in temperature, thereby affecting the performance of the surface lubricant, reducing the lubrication effect, and increasing the chance of wear, which is not conducive to extending the service life; at the same time, the temperature rise will cause deformation, which is not conducive to ensuring the stability of the structure, thereby affecting the accuracy of the shot shift distance. In addition, most of the existing fully automatic injection molding machines use a shot shift mechanism that drives the thrust block by the shot shift screw fixed on the frame to push the injection unit to achieve the nozzle and mold gate against and shoot shift movement. After the injection molding machine performs the clamping action, there is a large locking force between the head plate and the second plate (from 40 tons to 2000 tons, or even higher, depending on the size of the machine), which makes the mold tightly closed and will not expand during injection. Because of the existence of a large clamping force, the head plate, mold and other parts will definitely produce different degrees of deformation. Since the head plate is fixed and pulled by the pull rods at the four corners, it will be deformed into a pot shape that cannot be detected by the naked eye, and produce an axial displacement of about 0.1~2mm. Therefore, in order to avoid the above phenomenon, the prior art uses an electric shot-shifting mechanism with a spring to drive the injection part of the injection molding machine to move as a whole. During the movement, when the nozzle contacts the mold and encounters resistance, the spring on the shot-shifting mechanism is compressed until the required nozzle contact force (i.e., the force when the nozzle contacts the mold) is reached. The proximity switch senses the signal and controls the motor to cut off the power. In the above process, the deformation of the head plate, mold and other parts is transferred to the spring, which is then compressed and released by the spring to avoid deformation. However, in the prior art, because the size of the nozzle contact force cannot be adjusted according to the actual situation, there is still a phenomenon that the nozzle is easily damaged. Summary of the invention

[0004] The present invention aims to overcome the deficiency in the prior art that the size of the nozzle contact force cannot be adjusted according to actual conditions, and provides a nozzle contact force detection and adjustment device for an electric shot transfer injection molding machine, the size of which can be adjusted according to actual conditions.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A nozzle contact force detection and adjustment device for an electric shot-shift injection molding machine, comprising two linear guide rails parallel to each other, slides are mounted in the front and rear directions of the linear guide rails, both ends of the slide are slidably connected to the two linear guide rails, the top of the slide is a mounting surface, and a shot-shift assembly is provided at the bottom of the slide, the shot-shift assembly comprises a brake motor and a lead screw, the brake motor is detachably connected to the bottom of one of the slides, one end of the lead screw is detachably connected to the output end of the brake motor, and the other end of the lead screw is rotatably connected to the bottom of the other slide, a connecting assembly and a nut are sleeved on the lead screw, the nut is matched with the lead screw and slidably connected, the connecting assembly comprises an elastic seat and two guide rods parallel to each other, the elastic seat is located between the two slides, and the elastic seat comprises a front-to-back arrangement The connecting plate one and the connecting plate two, one end of the nut and the guide rod are both detachably fixedly connected to one side of the connecting plate one, and the other side corresponding to the connecting plate one is elastically connected to the connecting plate two, and the connecting plate one and the connecting plate two are both provided with avoidance holes matching the screw rod, and the end of the connecting plate two is provided with a proximity switch, and the proximity switch is detachably connected to the connecting plate two, and the proximity switch is electrically connected to the brake motor, and the end of the connecting plate one is detachably connected to a fixing plate, and the fixing plate is provided with a plurality of scale lines evenly distributed along the front and rear directions and sensing contacts corresponding to the proximity switches, and the sensing contacts are slidably connected to the fixing plate along the scale line direction, and the other end of the guide rod passes through the bottom of the corresponding slide and is located outside the two slides and is provided with a connecting piece, and the connecting piece is detachably and fixedly connected to the guide rod.

[0006] Slides are set up in the front and rear directions of the linear guide rails, and two ends of the slide are slidably connected to the two linear guide rails respectively. The top of the slide is a mounting surface, and a shooting movement assembly is provided at the bottom of the slide. The shooting movement assembly includes a brake motor and a screw rod. The brake motor is detachably connected to the bottom of one of the slides, one end of the screw rod is detachably connected to the output end of the brake motor, and the other end of the screw rod is rotatably connected to the bottom of the other slide. A connecting assembly and a nut are sleeved on the screw rod, and the nut is matched with the screw rod for sliding connection. The connecting assembly includes an elastic seat and two guide rods parallel to each other. The elastic seat is located between the two slides, and the elastic seat includes a connecting plate 1 and a connecting plate 2 arranged front and back. The nut and the guide rod One end of each of the connecting plates is detachably fixedly connected to one side of the connecting plate one, and the other side corresponding to the connecting plate one is elastically connected to the connecting plate two, and the connecting plate one and the connecting plate two are both provided with avoidance holes matching the screw rod, and the end of the connecting plate two is provided with a proximity switch, and the proximity switch is detachably connected to the connecting plate two, and the proximity switch is electrically connected to the brake motor, and the end of the connecting plate one is detachably connected to a fixing plate, and the fixing plate is provided with a plurality of scale lines evenly distributed along the front and rear directions and sensing contacts corresponding to the proximity switches, and the sensing contacts are slidably connected to the fixing plate along the direction of the scale lines, and the other end of the guide rod passes through the bottom of the corresponding slide and is located outside the two slides and is provided with a connecting piece, and the connecting piece is detachably and fixedly connected to the guide rod. One end of the linear guide and the connecting component is fixedly installed at the corresponding position of the frame, and the other end of the connecting component is connected to the mold clamping part. At the same time, the top mounting surface of the slide is used to install the injection component; when the brake motor is energized, the brake is opened, and the motor rotates to drive the screw to rotate, so that the nut performs a linear translation motion, and the connecting component is fixed. At this time, the brake motor, the slide and the injection part installed on the slide move forward on the linear guide to perform a seating action; when the nozzle contacts the mold and completes the injection, the motor rotates in the opposite direction to drive the screw to rotate in the opposite direction, and the injection part moves backward to perform a seating action; there are scale lines on the fixed plate, and the distance between the sensing contact and the proximity switch is changed by moving the position of the sensing contact, so that the size of the nozzle contact force can be adjusted according to the actual situation, thereby playing a role in protecting the nozzle.

[0007] Preferably, a rectangular adjustment hole is provided on the fixing plate, the front-to-back direction of the adjustment hole and the fixing plate are parallel to each other, a plurality of scale lines are evenly distributed on the edge of the adjustment hole along the length direction of the adjustment hole, a mounting plate is provided on the sensing contact piece, the length of the mounting plate is less than the length of the adjustment hole, a guide shaft and a handle screw are respectively provided on the top of the mounting plate, both of which match the adjustment hole, the sensing contact piece is slidably connected to the adjustment hole through the guide shaft, the sensing contact piece is detachably fixedly connected to the fixing plate through the handle screw, and the bottom of the mounting plate is detachably fixedly connected to the sensing contact piece. The fixing plate is provided with scale lines, the operator loosens the handle screw, moves the position of the sensing contact piece, and then tightens the handle screw to fix it, to change the spacing between the sensing contact piece and the proximity switch, thereby achieving the purpose that the size of the nozzle contact force can be adjusted according to the actual situation.

[0008] Preferably, one end of the fixed plate is close to the proximity switch, and the other end of the fixed plate is far from the proximity switch. Corresponding scale values ​​are marked on a number of scale lines, and the scale values ​​on the number of scale lines gradually increase from the end of the fixed plate close to the proximity switch to the other end far from the proximity switch. The fixed plate is provided with scale lines. The operator loosens the handle screw, moves the position of the sensing contact piece, and then tightens the handle screw to fix it, thereby changing the distance between the sensing contact piece and the proximity switch, thereby adjusting the size of the nozzle contact force; when the sensing contact piece slides close to the proximity switch, the scale value becomes smaller, so that when the proximity switch senses the sensing contact piece during operation, the compression of the spring becomes smaller, and the nozzle contact force generated by the spring compression becomes smaller; conversely, when the sensing contact piece slides away from the proximity switch, the scale value becomes larger, and the nozzle contact force is large. Finally, the size of the nozzle force is adjusted by moving the sensing contact piece to different positions.

[0009] Preferably, the second connecting plate is provided with a connecting shaft and a fixing seat, one end of the connecting shaft is telescopically connected to the first connecting plate, the other end of the connecting shaft is fixedly connected to the second connecting plate, the fixing seat is located on the side of the connecting shaft and is fixedly connected to the second connecting plate, a spring is sleeved on the connecting shaft, one end of the spring is fixedly connected to the first connecting plate, the other end of the spring is fixedly connected to the second connecting plate, and the first connecting plate is elastically connected to the second connecting plate via the spring. The spring involved in the present invention is a high-strength spring, and the transmission of deformation is facilitated by installing the spring, so that it is compressed and released by the spring, avoiding deformation of corresponding parts; the fixing seat facilitates the fixed connection of the second connecting plate to the frame.

[0010] Preferably, the connecting member comprises a connecting plate 3 and a connecting rod, one side of the connecting plate 3 is detachably fixedly connected to two guide rods respectively, and the other side of the connecting plate 3 corresponding to the connecting rod is detachably fixedly connected to the connecting rod. The connecting plate 3 can be connected to the clamping part through the connecting rod.

[0011] Preferably, the side wall of the nut is filled with grease, and an oil inlet and an oil outlet are respectively provided on the side wall of the nut. The oil inlet and the oil outlet are respectively connected to a flexible pipe. During the working process, since the nut is always in transmission with the screw rod, the grease is pumped into the nut through the oil inlet for heat exchange and then pumped out through the oil outlet, which is beneficial to cooling the nut and the screw rod, ensuring the lubrication effect, and extending the service life; at the same time, it is beneficial to ensure the stability of the structure and the accuracy of the shooting distance.

[0012] Preferably, the nut is provided with a plurality of oil grooves, the grease is filled in the oil grooves, the plurality of oil grooves are evenly distributed along the circumference with the screw as the center at one end of the nut, the end of the nut is provided with sealing covers respectively matching the plurality of oil grooves, the sealing covers are sealed and connected to the open ends of the oil grooves, and the other end of the nut corresponding to the nut is detachably connected to the connecting assembly. Heat is generated during the linear translation movement of the nut along the screw, and grease is stored in the plurality of oil grooves and evenly distributed along the circumference with the screw as the center, so that the grease can exchange heat more efficiently, thereby achieving the purpose of cooling.

[0013] Preferably, the sealing cover is in a circular shape, the screw rod passes through the inner circumference of the sealing cover, and a plurality of sealing plugs matching the opening ends of the oil grooves are fixed on the side of the sealing cover. The oil inlet and the oil outlet are both located on the outer circumference of the sealing cover, and the interior of the sealing cover and the interior of the sealing plug are both hollow structures. The oil inlet and the oil outlet are respectively connected to a plurality of oil grooves through the interior of the sealing cover and the interior of the sealing plug in turn. In order to improve the heat exchange efficiency, the opening direction of the oil groove is parallel to the screw rod, which is convenient for increasing the grease storage capacity and facilitating the processing of the oil groove; the grease is pumped into the interior of the sealing cover through the oil inlet, and then enters the corresponding oil groove through the interior of several sealing plugs for heat exchange, and then pumped out through the oil outlet for cooling. The cooled grease is pumped in again through the oil inlet for circulation. In the process, in order to ensure that the grease can obtain sufficient heat exchange, a one-way valve can be set on the pipeline connected to the oil outlet. Therefore, this structural design is conducive to cooling the nut and the screw rod, thereby achieving the purpose of ensuring the lubrication effect and extending the service life; at the same time, it is conducive to ensuring the stability of the structure and the accuracy of the shooting distance.

[0014] Preferably, the nut is provided with a matching hole matching the screw rod, and the side wall of the oil groove is provided with a plurality of fine holes connected with the matching hole, and the plurality of fine holes are distributed along the length direction of the matching hole. When the screw rod is stationary, the fine holes are blocked by the screw rod to prevent oil leakage; when the nut moves linearly along the screw rod, part of the grease is coated on the surface of the screw rod from the fine holes, which is beneficial to cooling and further improves the lubrication effect.

[0015] Preferably, the oil inlet and the oil outlet are both provided with connecting tubes, which are protrudingly arranged on the outer circumferential surface of the sealing cover and fixedly connected to the sealing cover. The setting of the connecting tube facilitates the connection with the external flexible tube on the one hand, and provides a fulcrum for the removal of the sealing cover on the other hand.

[0016] The beneficial effects of the present invention are as follows: the fixed plate is provided with scale lines, and the distance between the sensing contact piece and the proximity switch is changed by moving the position of the sensing contact piece, so that the size of the nozzle contact force can be adjusted according to the actual situation, and the nozzle is protected; the grease is pumped into the nut through the oil inlet for heat exchange, and then pumped out through the oil outlet, which is beneficial to the cooling of the nut and the screw rod, and is beneficial to ensuring the lubrication effect and extending the service life; at the same time, it is beneficial to ensure the stability of the structure and the accuracy of the shooting distance; the spring involved in the present invention is a high-strength spring, and the spring is installed to facilitate the transmission of the deformation, so that it is compressed and released by the spring, and the corresponding parts are avoided from deformation; the function of the brake motor driving the shooting action is realized; when the screw rod is stationary, the fine hole is blocked by the screw rod to prevent oil leakage; when the nut makes a linear translational motion along the screw rod, part of the grease is coated on the surface of the screw rod from the fine hole, which is beneficial to cooling and further improves the lubrication effect; the setting of the connecting pipe column is convenient for connection with the external flexible pipe on the one hand, and provides a fulcrum for the disassembly of the sealing cover on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a front view of the present invention; Figure 3 yes Figure 1 A magnified view of the structure at center A; Figure 4 It is a structural diagram of a nut; Figure 5 yes Figure 4 Cross-sectional view of the middle BB; Figure 6 It is a schematic diagram of the specific connection structure of the sensing contact.

[0018] In the figure: 1. Linear guide rail, 2. Slide, 3. Shooting and shifting assembly, 4. Brake motor, 5. Screw, 6. Connecting assembly, 7. Nut, 8. Avoidance hole, 9. Oil inlet, 10. Oil outlet, 11. Guide rod, 12. Elastic seat, 13. Connecting piece, 14. Connecting plate 1, 15. Connecting plate 2, 16. Fixed seat, 17. Spring, 18. Proximity switch, 19. Induction contact sheet, 20. Connecting plate 3, 21. Connecting rod, 22. Oil groove, 23. Sealing cover, 24. Sealing plug, 25. Matching hole, 26. Fine hole, 27. Connecting column, 28. Fixed plate, 29. Scale line, 30. Adjustment hole, 31. Mounting plate, 32. Guide shaft, 33. Handle screw. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0021] Unless otherwise specified, the relative arrangement of the components, numerical expressions and numerical values ​​described in these embodiments do not limit the scope of the present application. For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" are used in the embodiments to illustrate the relationship between an element or feature shown in the figure and another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be fixed "on" other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations. The device can be fixed in other ways (rotated 90 degrees or located in other orientations), and the spatial relative description used here can be interpreted accordingly. At the same time, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, process and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, process and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0022] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0023] like Figure 1 and Figure 2 In the described embodiment, a nozzle contact force detection and adjustment device for an electric shot-shift injection molding machine is provided, which includes two linear guide rails 1 parallel to each other, slides 2 are arranged on the front and rear directions of the linear guide rails 1, and the two ends of the slide 2 are respectively slidably connected to the two linear guide rails 1, the top of the slide 2 is a mounting surface, and the bottom of the slide 2 is provided with a shot-shift assembly 3, the shot-shift assembly 3 includes a brake motor 4 and a screw rod 5, the brake motor 4 is detachably connected to the bottom of one of the slides 2, one end of the screw rod 5 is detachably connected to the output end of the brake motor 4, and the other end of the screw rod 5 is rotatably connected to the bottom of the other slide 2, a connecting assembly 6 and a nut 7 are sleeved on the screw rod 5, the nut 7 is matched with the screw rod 5 and is slidably connected, the connecting assembly 6 includes an elastic seat 12 and two guide rods 11 parallel to each other, the elastic seat 12 is located between the two slides 2, as shown Figure 3 and Figure 6As shown, the elastic seat 12 includes a connecting plate 14 and a connecting plate 2 15 arranged in front and back, one end of the nut 7 and the guide rod 11 are both detachably fixedly connected to one side of the connecting plate 14, and the other side corresponding to the connecting plate 14 is elastically connected to the connecting plate 2 15. The connecting plate 14 and the connecting plate 2 15 are both provided with avoidance holes 8 matching the screw rod 5, and the end of the connecting plate 2 15 is provided with a proximity switch 18, which is detachably connected to the connecting plate 2 15, and the proximity switch 18 is electrically connected to the brake motor 4. The end of the connecting plate 14 is detachably connected to a fixed plate 28, and the fixed plate 28 is provided with a plurality of scale lines 29 evenly distributed along the front and rear directions and a sensing contact piece 19 corresponding to the proximity switch 18, and the sensing contact piece 19 is slidably connected to the fixed plate 28 along the direction of the scale lines 29. The other end of the guide rod 11 passes through the bottom of the corresponding slide 2 and is located outside the two slides 2 and is provided with a connecting piece 13, and the connecting piece 13 is detachably fixedly connected to the guide rod 11.

[0024] like Figure 6 As shown, a rectangular adjustment hole 30 is provided on the fixing plate 28, and the front-to-rear directions of the adjustment hole 30 and the fixing plate 28 are parallel to each other, and a plurality of scale lines 29 are evenly distributed on the edge of the adjustment hole 30 along the length direction of the adjustment hole 30, and a mounting plate 31 is provided on the sensing contact piece 19, and the length of the mounting plate 31 is less than the length of the adjustment hole 30, and a guide shaft 32 and a handle screw 33 that match the adjustment hole 30 are respectively provided on the top of the mounting plate 31, and the sensing contact piece 19 is slidably connected to the adjustment hole 30 through the guide shaft 32, and the sensing contact piece 19 is detachably fixedly connected to the fixing plate 28 through the handle screw 33, and the bottom of the mounting plate 31 is detachably fixedly connected to the sensing contact piece 19.

[0025] like Figure 6 As shown, one end of the fixed plate 28 is close to the proximity switch 18, and the other end of the fixed plate 28 is far away from the proximity switch 18. Corresponding scale values ​​are marked on a plurality of scale lines 29, and the scale values ​​on the plurality of scale lines 29 gradually increase from one end of the fixed plate 28 close to the proximity switch 18 to the other end far away from the proximity switch 18.

[0026] like Figure 3 As shown, a connecting shaft and a fixing seat 16 are provided on the connecting plate 15. One end of the connecting shaft is telescopically connected to the connecting plate 14, and the other end of the connecting shaft is fixedly connected to the connecting plate 15. The fixing seat 16 is located on the side of the connecting shaft and is fixedly connected to the connecting plate 15. A spring 17 is sleeved on the connecting shaft, one end of the spring 17 is fixedly connected to the connecting plate 14, and the other end of the spring 17 is fixedly connected to the connecting plate 15. The connecting plate 14 is elastically connected to the connecting plate 15 via the spring 17.

[0027] like Figure 1 and Figure 2As shown, the connecting member 13 includes a connecting plate three 20 and a connecting rod 21 , one side of the connecting plate three 20 is detachably fixedly connected to the two guide rods 11 , and the other side of the connecting plate three 20 is detachably fixedly connected to the connecting rod 21 .

[0028] like Figure 5 As shown, the side wall of the nut 7 is filled with grease, and an oil inlet 9 and an oil outlet 10 are respectively provided on the side wall of the nut 7.

[0029] like Figure 5 As shown, the nut 7 is provided with a plurality of oil grooves 22, in which grease is filled. The plurality of oil grooves 22 are evenly distributed circumferentially at one end of the nut 7 with the screw rod 5 as the center. The end of the nut 7 is provided with sealing covers 23 respectively matching the plurality of oil grooves 22. The sealing covers 23 are sealedly connected to the open ends of the oil grooves 22, and the other corresponding end of the nut 7 is detachably connected to the connecting assembly 6.

[0030] like Figure 4 and Figure 5 As shown, the sealing cover 23 is annular, the screw rod 5 passes through the inner circumference of the sealing cover 23, and a plurality of sealing plugs 24 that match the open ends of the oil grooves 22 are fixed on the side of the sealing cover 23. The oil inlet 9 and the oil outlet 10 are both located on the outer circumference of the sealing cover 23. The interior of the sealing cover 23 and the interior of the sealing plug 24 are both hollow structures. The oil inlet 9 and the oil outlet 10 are respectively connected to the plurality of oil grooves 22 through the interior of the sealing cover 23 and the interior of the sealing plug 24 in turn.

[0031] like Figure 5 As shown, a matching hole 25 matching with the screw rod 5 is provided inside the nut 7 , and a plurality of fine holes 26 connected with the matching hole 25 are provided on the side wall of the oil groove 22 , and the plurality of fine holes 26 are distributed along the length direction of the matching hole 25 .

[0032] like Figure 4 and Figure 5 As shown, a connecting pipe column 27 is provided at both the oil inlet 9 and the oil outlet 10 . The connecting pipe column 27 is protrudingly disposed on the outer circumferential surface of the sealing cover 23 and is fixedly connected to the sealing cover 23 .

[0033] In the first embodiment, the fixing plate 28 is provided with a scale line 29. The operator loosens the handle screw 33, moves the position of the sensing contact piece 19, and then tightens the handle screw 33 to fix it, thereby changing the distance between the sensing contact piece 19 and the proximity switch 18, thereby adjusting the size of the nozzle contact force; when the sensing contact piece 19 approaches the proximity switch 18 by sliding back and forth, the scale value becomes smaller, so that when the proximity switch 18 senses the sensing contact piece 19 during operation, the compression amount of the spring 17 becomes smaller, and the nozzle contact force generated by the compression of the spring 17 becomes smaller; conversely, when the sensing contact piece 19 moves away from the proximity switch 18 by sliding back and forth, the scale value becomes larger, and the nozzle contact force also becomes larger. Finally, the size of the nozzle force is adjusted by moving the sensing contact piece 19 to different positions.

[0034] In the second embodiment, the linear guide rail 1 and the fixing seat 16 are fixedly installed at the corresponding positions of the frame, the connecting plate 20 can be connected to the mold clamping part through the connecting rod 21, and the top mounting surface of the slide 2 is used to install the injection component. When the brake motor 4 is powered on, the brake is opened, the brake motor 4 rotates to drive the screw rod 5 to rotate, so that the nut 7 performs a linear translation movement, and the connecting assembly 6 is fixed. At this time, the brake motor 4, the slide 2, and the injection part installed on the slide 2 move forward on the linear guide rail 1 to perform the seating action; when performing the seating action, when the nozzle contacts the mold, it encounters resistance, and the spring 17 is compressed until the required nozzle contact force (i.e., the force when the nozzle contacts the mold) is reached, and the proximity switch 18 senses the signal, the brake motor 4 is powered off, and the brake prevents the screw rod 5 from rotating, the seating action is completed, and it indicates that the seating is in place; on the contrary, when the brake motor 4 rotates in the opposite direction, the compressed spring 17 is released, and then the injection part moves backward again to perform the seating action, thereby realizing the function of the brake motor 4 driving the injection action. The spring 17 involved in the present invention is a high-strength spring 17. By installing the spring 17, it is conducive to the transmission of the deformation amount, so that it is compressed and released by the spring 17, and the corresponding parts are prevented from deformation.

[0035] Embodiment 3: When the screw 5 is stationary, the fine hole 26 is blocked by the screw 5 to prevent oil leakage; the oil inlet 9 and the oil outlet 10 are respectively connected to the flexible pipe through the connecting pipe column 27. During the above-mentioned shooting and shifting process, since the nut 7 is always in transmission with the screw 5, heat will be generated during the process of the nut 7 moving along the screw 5 in a straight line. Therefore, the grease is pumped into the inside of the sealing cover 23 through the oil inlet 9, and then enters the corresponding oil groove 22 through the inside of several sealing plugs 24 for heat exchange, and then pumped out through the oil outlet 10 for cooling. The cooled grease is pumped in again through the oil inlet 9, and the cycle is carried out. In the process, in order to enable the grease to obtain sufficient heat exchange, a one-way valve can be set on the pipeline connected to the oil outlet 10. Therefore, this structural design is conducive to cooling the nut 7 and the screw 5, achieving the purpose of ensuring the lubrication effect and extending the service life; at the same time, it is conducive to ensuring the stability of the structure and the accuracy of the shooting and shifting distance. In addition, when the nut 7 performs a linear translational motion along the screw rod 5, part of the grease is coated on the surface of the screw rod 5 from the fine hole 26, which is beneficial to cooling and further improves the lubrication effect.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A nozzle contact force detection and adjustment device for an electric shot transfer injection molding machine, characterized in that: The invention comprises two linear guide rails (1) parallel to each other, slides (2) are respectively mounted on the front and rear directions of the linear guide rails (1), the two ends of the slide rails (2) are respectively slidably connected to the two linear guide rails (1), the top of the slide rail (2) is a mounting surface, the bottom of the slide rail (2) is provided with a projection movement assembly (3), the projection movement assembly (3) comprises a brake motor (4) and a lead screw (5), the brake motor (4) is detachably connected to the bottom of one of the slide rails (2), one end of the lead screw (5) is connected to the output end of the brake motor (4), and the projection movement assembly (3) comprises a brake motor (4) and a lead screw (5), the brake motor (4) is detachably connected to the bottom of one of the slide rails (2), and one end of the lead screw (5) is connected to the output end of the brake motor (4). The screw rod (5) is detachably connected, the other end of the screw rod (5) is rotatably connected to the bottom of another slide (2), the screw rod (5) is sleeved with a connecting assembly (6) and a nut (7), the nut (7) is matched with the screw rod (5) and is slidably connected, the connecting assembly (6) comprises an elastic seat (12) and two mutually parallel guide rods (11), the elastic seat (12) is located between the two slides (2), the elastic seat (12) comprises a connecting plate 1 (14) and a connecting plate 2 (15) arranged front and rear, the nut (7) and the guide rods (11) are connected to each other. One end of the rod (11) is detachably fixedly connected to one side of the connecting plate 1 (14), and the other side of the connecting plate 1 (14) corresponding to the connecting plate 1 (14) is elastically connected to the connecting plate 2 (15). The connecting plate 1 (14) and the connecting plate 2 (15) are both provided with avoidance holes (8) matching the screw rod (5). The end of the connecting plate 2 (15) is provided with a proximity switch (18), and the proximity switch (18) is detachably connected to the connecting plate 2 (15). The proximity switch (18) is electrically connected to the brake motor (4). The connecting plate 1 (1 The end of the guide rod (11) is detachably connected to a fixing plate (28), the fixing plate (28) being provided with a plurality of scale lines (29) evenly distributed along the front-back direction and a sensing contact piece (19) corresponding to the proximity switch (18), the sensing contact piece (19) being slidably connected to the fixing plate (28) along the direction of the scale lines (29), the other end of the guide rod (11) passing through the bottom of the corresponding slide (2) and being located outside the two slides (2) and being provided with a connecting piece (13), the connecting piece (13) being detachably fixedly connected to the guide rod (11).

2. The nozzle contact force detection and adjustment device for an electric transfer injection molding machine according to claim 1 is characterized in that: The fixing plate (28) is provided with a rectangular adjustment hole (30), the front-rear directions of the adjustment hole (30) and the fixing plate (28) are parallel to each other, a plurality of scale lines (29) are evenly distributed on the edge of the adjustment hole (30) along the length direction of the adjustment hole (30), the sensing contact piece (19) is provided with a mounting plate (31), the length of the mounting plate (31) is less than the length of the adjustment hole (30), the top of the mounting plate (31) is respectively provided with a guide shaft (32) and a handle screw (33) both matching the adjustment hole (30), the sensing contact piece (19) is slidably connected to the adjustment hole (30) via the guide shaft (32), the sensing contact piece (19) is detachably fixedly connected to the fixing plate (28) via the handle screw (33), and the bottom of the mounting plate (31) is detachably fixedly connected to the sensing contact piece (19).

3. A nozzle contact force detection and adjustment device for an electric transfer injection molding machine according to claim 1 or 2, characterized in that: One end of the fixed plate (28) is close to the proximity switch (18), and the other end of the fixed plate (28) is far from the proximity switch (18). Corresponding scale values ​​are marked on the plurality of scale lines (29), and the scale values ​​on the plurality of scale lines (29) gradually increase from the end of the fixed plate (28) close to the proximity switch (18) to the other end of the fixed plate (28) far from the proximity switch (18).

4. A nozzle contact force detection and adjustment device for an electric transfer injection molding machine according to claim 1 or 2, characterized in that: The second connecting plate (15) is provided with a connecting shaft and a fixing seat (16); one end of the connecting shaft is telescopically connected to the first connecting plate (14); the other end of the connecting shaft is fixedly connected to the second connecting plate (15); the fixing seat (16) is located on the side of the connecting shaft and is fixedly connected to the second connecting plate (15); a spring (17) is sleeved on the connecting shaft; one end of the spring (17) is fixedly connected to the first connecting plate (14); the other end of the spring (17) is fixedly connected to the second connecting plate (15); the first connecting plate (14) is elastically connected to the second connecting plate (15) via the spring (17).

5. The nozzle contact force detection and adjustment device for an electric transfer injection molding machine according to claim 1 or 2, characterized in that: The connecting member (13) comprises a connecting plate three (20) and a connecting rod (21), one side of the connecting plate three (20) being detachably fixedly connected to the two guide rods (11) respectively, and the other side of the connecting plate three (20) corresponding to the connecting rod (21) being detachably fixedly connected.

6. A nozzle contact force detection and adjustment device for an electric transfer injection molding machine according to claim 1 or 2, characterized in that: The side wall of the nut (7) is filled with grease, and an oil inlet (9) and an oil outlet (10) are respectively provided on the side wall of the nut (7).

7. The nozzle contact force detection and adjustment device for an electric transfer injection molding machine according to claim 6 is characterized in that: The nut (7) is provided with a plurality of oil grooves (22), the grease being filled in the oil grooves (22), the plurality of oil grooves (22) being evenly distributed along the circumference at one end of the nut (7) with the screw rod (5) as the center, the end of the nut (7) being provided with sealing covers (23) respectively matching the plurality of oil grooves (22), the sealing covers (23) being sealingly connected to the open ends of the oil grooves (22), and the other corresponding end of the nut (7) being detachably connected to the connecting assembly (6).

8. The nozzle contact force detection and adjustment device for an electric transfer injection molding machine according to claim 7 is characterized in that: The sealing cover (23) is annular in shape, the screw rod (5) passes through the inner circumferential surface of the sealing cover (23), a plurality of sealing plugs (24) are fixed on the side of the sealing cover (23) and are matched with the open ends of the oil grooves (22) one by one, the oil inlet (9) and the oil outlet (10) are both located on the outer circumferential surface of the sealing cover (23), the interior of the sealing cover (23) and the interior of the sealing plug (24) are both hollow structures, and the oil inlet (9) and the oil outlet (10) are respectively connected to the plurality of oil grooves (22) through the interior of the sealing cover (23) and the interior of the sealing plug (24) in sequence.

9. The nozzle contact force detection and adjustment device for an electric transfer injection molding machine according to claim 8, characterized in that: The nut (7) is provided with a matching hole (25) matching with the screw rod (5) inside, and the side wall of the oil groove (22) is provided with a plurality of fine holes (26) connected with the matching hole (25), and the plurality of fine holes (26) are distributed along the length direction of the matching hole (25).

10. The nozzle contact force detection and adjustment device for an electric transfer injection molding machine according to claim 8, characterized in that: The oil inlet (9) and the oil outlet (10) are both provided with a connecting pipe column (27), and the connecting pipe column (27) is protrudingly arranged on the outer circumferential surface of the sealing cover (23) and is fixedly connected to the sealing cover (23).

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