Screw driving device, die lip adjustment apparatus, and injection molding machine

Abstract

The utility model discloses a kind of screwing device, mould lip adjusting equipment and injection molding machine, it is related to injection molding equipment technical field, and the screwing device includes support, power component, rotating component and first elastic member, power component is installed in support;Rotating component is drivingly connected power component, power component is used to drive rotating head and is screwed to preset position to adjust the opening of mould lip;First elastic member is used to provide the force that makes rotating component move in the direction of far from power component;The technical scheme provided by the utility model is by setting first elastic member in screwing device, to make rotating component can move in the direction of far from power component;Screwing device in the process of screwing down screw, can buffer the rigid collision of rotating piece and screw by first elastic member, avoid the damage of part caused by screw and rotating head collision, to improve the service life of screwing device, and mould lip adjusting equipment and injection molding machine applied to the screwing device.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and in particular to a screw-driving device, a mold lip adjustment device, and an injection molding machine. Background Technology

[0002] Injection molding machines are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. The injection molding machine heats the plastic, applies high pressure to the molten plastic, and injects it to fill the mold cavity. After the plastic in the mold cavity cools and solidifies, the final plastic product is formed. During injection molding, the screw-in depth of the screw-in device can be adjusted to regulate the opening of the mold lip, thereby regulating the flow rate of the extruded molten plastic. In existing technology, the rotating head of the screw-in device in the injection molding machine is prone to rigid collision with the screw, resulting in damage to the threaded parts or the rotating head, and reducing the service life of the equipment. Utility Model Content

[0003] The main purpose of this invention is to provide a screw-driving device, a mold lip adjustment device, and an injection molding machine, with the aim of improving the service life of injection molding equipment.

[0004] To achieve the above objectives, the present invention proposes a screw-driving device for a die lip adjustment device. The screw-driving device includes: a bracket, a power component, a rotating component, and a first elastic element. The bracket is slidably mounted on the die lip adjustment device. The power component is mounted on the bracket. The rotating component is drively connected to the power component and has a rotating head for tightening screws. The rotating head is located at the end of the rotating component away from the power component. The power component drives the rotating component to rotate, thereby causing the rotating head to tighten the screw to a preset position, thus allowing the die lip adjustment device to adjust the opening of the die lip. The first elastic element is elastically abutting between the rotating component and the power component in a first direction, and the first elastic element provides a force that causes the rotating component to move away from the power component.

[0005] In one embodiment, the bracket includes: a first support member, a second support member, and a second elastic member; the first support member is slidably mounted on the die lip adjustment device along a first direction, and the power component is mounted on the first support member; the second support member is slidably mounted on the first support member along the first direction, and the rotating component is rotatably disposed on the second support member; the second elastic member extends along the first direction and elastically abuts against the first support member and the second support member.

[0006] In one embodiment, the die lip adjusting device has a first guide rail extending along a first direction. The first support member includes: a vertical plate, a first fixing part, a second fixing part, and a second guide rail. The vertical plate is slidably mounted on the first guide rail. The first fixing part is located on the side of the vertical plate opposite to the first guide rail, and the power component is mounted on the first fixing part. The second fixing part is located on the side of the vertical plate opposite to the first guide rail, and the second fixing part is spaced apart along the first direction on the side of the first fixing part near the screw. The second guide rail extends along the first direction between the first fixing part and the second fixing part, and the second support member is slidably mounted on the second guide rail. The second fixing part has a clearance hole for the second support member to pass through, and the second support member is slidably inserted through the clearance hole.

[0007] In one embodiment, the second support member includes: a bearing sleeve and a bearing; the bearing sleeve is slidably mounted on the second guide rail, and the bearing sleeve has a guide member extending in a first direction on the side near the first fixing part, the second elastic member is sleeved around the guide member, the first fixing part has a through hole on the side near the second fixing part for the guide member to pass through, the end of the guide member away from the bearing sleeve is slidably disposed in the through hole, and the second elastic member elastically abuts against the bearing sleeve and the first fixing part; the bearing is mounted on the bearing sleeve, and the rotating component is rotatably mounted on the bearing.

[0008] In one embodiment, the power assembly includes a power component and a drive shaft. The power component has a power shaft, and the drive shaft is driveably connected to the power shaft. The rotating component is drively connected to the end of the drive shaft away from the power component.

[0009] In one embodiment, the rotating assembly includes: a transmission member and a rotating head; the transmission member has a fixing hole along a first direction, the fixing hole having a first hole segment and a second hole segment that are axially interconnected, the first hole segment being located on the side of the second hole segment closer to the power assembly, the transmission shaft being inserted into the first hole segment and being drivenly connected to the inner wall of the first hole segment; the rotating head being inserted into the end of the second hole segment away from the first hole segment and being drivenly connected to the inner wall of the second hole segment; the inner diameter of the second hole segment is smaller than the inner diameter of the first hole segment, so that a limiting step is formed at the junction of the first hole segment and the second hole segment, and the first elastic member elastically abuts against the transmission shaft and the limiting step.

[0010] In one embodiment, the outer wall of the rotating head has a first insertion hole in the radial direction, and the inner wall of the fixing hole has a second insertion hole in the radial direction. The first insertion hole communicates with the second insertion hole. The rotating assembly also includes a pin, which is inserted into the first insertion hole and the second insertion hole.

[0011] In one embodiment, a limiting hole is formed on the side of the drive shaft near the transmission member, and the limiting hole extends along a first direction; the rotating assembly further includes a guide rod, one end of which is fixedly installed in the second hole section, and the other end is slidably disposed in the limiting hole, and the first elastic member surrounds the guide rod.

[0012] This utility model also proposes a die lip adjustment device, including: a frame, a die lip, and a screw-driving device; the frame has a first guide rail and a third guide rail, the first guide rail extends along a first direction, the third guide rail extends along a second direction, the first guide rail is slidably mounted on the third guide rail, and the first direction intersects the second direction; the die lip is mounted on the frame, the die lip includes an upper die head and a lower die head, an opening for extruding raw materials is formed between the upper die head and the lower die head, the die lip is provided with a row of adjustment holes spaced apart along the second direction, screws are provided in the adjustment holes, and the size of the opening formed between the upper die head and the lower die head is adjusted by the screws; the screw-driving device is any of the above-described screw-driving devices, the screw-driving device is slidably mounted on the first guide rail via the bracket, and the screw-driving device is used to adjust the screw insertion depth in the threaded hole to adjust the opening of the upper die head and the lower die head.

[0013] This utility model also proposes an injection molding machine, including the above-mentioned mold lip adjustment device.

[0014] The technical solution of this utility model adopts a screw-driving device with a bracket, a power component, a rotating component, and a first elastic element. The bracket is slidably mounted on the mold lip adjustment device, the power component is mounted on the bracket, and the rotating component is drivenly connected to the power component. The rotating component has a rotating head for tightening the screw, which is located at the end of the rotating component away from the power component. The power component drives the rotating component to rotate, thereby driving the rotating head to tighten the screw to a preset position, which in turn allows the mold lip adjustment device to adjust the opening of the mold lip. The first elastic element can elastically extend and retract along a first direction and elastically abuts against the rotating component and the power component. The first elastic element provides a force to move the rotating component away from the power component. During the downward sliding and screw-tightening process, the screw-driving device can buffer the rigid collision between the rotating component and the screw through the first elastic element, thereby avoiding damage to parts caused by the collision between the screw and the rotating head, and thus improving the service life of the screw-driving device, the mold lip adjustment device using the screw-driving device, and the injection molding machine. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 A schematic diagram of an embodiment of the screw-driving device provided by this utility model; Figure 2 for Figure 1 Sectional view at point AA; Figure 3 A schematic diagram of the bracket in one embodiment of the screw-driving device provided by this utility model; Figure 4 A schematic diagram of the installation structure of the power component and the rotating component in one embodiment of the screw-driving device provided by this utility model; Figure 5 A schematic diagram of an embodiment of the die lip adjustment device provided by this utility model.

[0017] Explanation of icon numbers: 100. Screw-driving device; 1. Bracket; 11. First support member; 111. Vertical plate; 112. First fixing part; 112a. Through hole; 113. Second fixing part; 113a. Clearance hole; 114. Second guide rail; 12. Second support member; 121. Bearing sleeve; 121a. Guide member; 122. Bearing; 13. Second elastic member; 2. Power assembly; 21. Power component; 211. Power shaft; 22. Transmission shaft; 221. Limiting hole; 3. Rotating assembly; 31. Rotating head; 311. First insertion hole; 32. Transmission member; 321. Fixing hole; 321a. First hole section; 321b. Second hole section; 321c. Limiting step; 33. Guide rod; 4. First elastic member; 200. Die lip adjustment device; 201. Frame; 201a. First guide rail; 201b. Third guide rail; 202. Die lip; 202a. Upper die head; 202b. Lower die head; 202c. Screw.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] 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.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] Injection molding machines are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. The injection molding machine heats the plastic, applies high pressure to the molten plastic, and injects it to fill the mold cavity. After the plastic in the mold cavity cools and solidifies, the final plastic product is formed. During injection molding, the screw-in depth of the screw-in device can be adjusted to regulate the opening of the mold lip, thereby regulating the flow rate of the extruded molten plastic. In existing technology, the rotating head of the screw-in device in the injection molding machine is prone to rigid collision with the screw, resulting in damage to the threaded parts or the rotating head, and reducing the service life of the equipment.

[0023] This utility model proposes a screw-driving device 100.

[0024] Please see Figure 1-5In one embodiment of this utility model, the screw-driving device 100 includes: a bracket 1, a power component 2, a rotating component 3, and a first elastic member 4. The bracket 1 is slidably mounted on the die lip adjustment device 200. The power component 2 is mounted on the bracket 1. The rotating component 3 is connected to the power component 2 and has a rotating head 31 for tightening the screw 202c. The rotating head 31 is located at the end of the rotating component 3 away from the power component 2. The power component 2 drives the rotating component 3 to rotate so that the rotating head 31 tightens the screw 202c to a preset position, thereby enabling the die lip adjustment device 200 to adjust the opening of the die lip. The first elastic member 4 can elastically extend and retract along a first direction and elastically abut against the rotating component 3 and the power component 2. The first elastic member 4 is used to provide a force that causes the rotating component 3 to move away from the power component 2.

[0025] In this embodiment, the bracket 1 slides on the die lip adjustment device 200 to move the entire screw-driving device 100 on the die lip adjustment device 200. The power component 2 provides power for the rotation of the rotating component 3, enabling the entire rotating component 3 to rotate under electric drive, thereby rotating the screw 202c head in the rotating component 3 to tighten the screw 202c. The rotating component 3 and the power component 2 have a transmission cooperation structure so that the rotating component 3 can rotate under the drive of the power component 2, thereby driving the rotating head 31 located in the rotating component 3 to rotate. The rotating head 31 is used to dock with the screw 202c. The top of the screw 202c is provided with a groove that matches the shape of the rotating head 31. The rotating head 31 drives the screw 202c to rotate and move down to a preset position by inserting into the groove that matches the top of the screw 202c. The first elastic element 4 is used to buffer the rigid collision that occurs when the rotating head 31 contacts the screw 202c. Since both the rotating head 31 and the screw 202c are metal parts, they are prone to wear and damage during a rigid collision. The first elastic element 4 can elastically extend and retract along a first direction, which is the axial direction of the rotating head 31. When the rotating head 31 contacts the screw 202c, the rotating head 31 can move towards the power component 21 within the rotating assembly 3 through the elastic extension and retraction of the first elastic element 4, thereby buffering the force generated by the collision and avoiding a rigid collision between the rotating head 31 and the screw 202c. After the rotating head 31 and the screw 202c separate, the first elastic element 4 can reset its position to allow for the next tightening.

[0026] In this embodiment, before tightening the screw 202c, the screw-driving device 100 is driven to the top of the screw 202c and suspended. Then, the bracket 1 begins to slide towards the screw 202c along a first direction, which is the axial direction of the rotating head 31. During the sliding process, the bracket 1 continuously approaches the screw 202c until the rotating head 31 inserts into the groove at the top of the screw 202c. At this point, even if the bracket 1 continues to slide towards the screw 202c, the rotating head 31 can buffer the pressure caused by the continuous downward pressure of the bracket 1 through the first elastic element 4, thereby protecting the rotating head 31 and the screw 202c and preventing them from experiencing significant wear. When the rotating head 31 comes into contact with the screw 202c, the rotating assembly 3 is driven to rotate. The rotating assembly 3 can drive the rotating head 31 to rotate, thereby driving the screw 202c to rotate. Under the action of rotation, the screw 202c continuously penetrates deeper into the threaded hole, causing the upper and lower die lips of the die lip adjustment device 200 to move relative to each other, thereby adjusting the opening of the die lip 202.

[0027] The technical solution of this utility model adopts a screw-driving device 100 comprising a bracket 1, a power component 2, a rotating component 3, and a first elastic element 4. The bracket 1 is slidably mounted on the die lip adjustment device 200. The power component 2 is mounted on the bracket 1. The rotating component 3 is driven by the power component 2. The rotating component 3 has a rotating head 31 for tightening the screw 202c. The rotating head 31 is located at the end of the rotating component 3 away from the power component 2. The power component 2 drives the rotating component 3 to rotate, thereby causing the rotating head 31 to tighten the screw 202c to a preset position, thereby enabling the die lip adjustment device 200 to adjust the opening of the die lip 202. The first elastic element 4 can elastically extend and retract along the first direction and elastically abut against the rotating component 3 and the power component 2. The first elastic element 4 is used to provide a force to move the rotating component 3 away from the power component 2. This allows the screw-driving device 100 to buffer the rigid collision between the rotating component and the screw 202c during the downward sliding and screwing process, thereby avoiding damage to the parts caused by the collision between the screw 202c and the rotating head 31. This improves the service life of the screw-driving device 100, the mold lip adjustment device 200 using the screw-driving device 100, and the injection molding machine.

[0028] See Figure 1 , 3 In one embodiment, the bracket 1 includes: a first support member 11, a second support member 12, and a second elastic member 13; the first support member 11 is slidably mounted on the die lip adjustment device 200 along a first direction, and the power component 2 is mounted on the first support member 11; the second support member 12 is slidably mounted on the first support member 11 along the first direction, and the rotating component 3 is rotatably disposed on the second support member 12; the second elastic member 13 extends along the first direction and elastically abuts against the first support member 11 and the second support member 12.

[0029] In this embodiment, the first support member 11 is used to support the installation of the power assembly 2, and the second support member 12 is used to support the rotating assembly 3. The second support member 12 can move along the first direction on the first support member 11, and the second elastic member 13 elastically abuts between the first support member 11 and the second support member 12. When the rotating head 31 contacts the screw 202c, the bracket 1 drives the device to continue pressing down, and the rotating assembly 3 moves axially toward the direction closer to the power assembly 2. The rotating assembly 3 is fixedly connected to the second support member 12, and the second support member 12 can move along the bracket 1 toward the direction closer to the power assembly 21 with the rotating assembly 3. The second support member 12 is provided between the second support member 12 and the first support member 11, which can further buffer the rigid connection between the rotating head 31 and the screw 202c, and avoid the rigid reset between the rotating part and the screw 202c. After the rotating part leaves the screw 202c, it can be reset by the elastic potential energy of the second elastic member 13, pushing the second support member 12 back to the initial position.

[0030] In one embodiment, the die lip adjustment device 200 has a first guide rail 201a extending along a first direction. The first support member 11 includes: a vertical plate 111, a first fixing part 112, a second fixing part 113, and a second guide rail 114. The vertical plate 111 is slidably mounted on the first guide rail 201a. The first fixing part 112 is located on the side of the vertical plate 111 away from the first guide rail 201a, and the power assembly 2 is mounted on the first fixing part 112. The second fixing part 113 is located on the vertical plate 111. On the side opposite to the first guide rail 201a, the second fixing part 113 is spaced apart along the first direction on the side of the first fixing part 112 near the screw 202c; the second guide rail 114 extends along the first direction and is disposed between the first fixing part 112 and the second fixing part 113, and the second support member 12 is slidably mounted on the second guide rail 114; the second fixing part 113 has a clearance hole 113a for the second support member 12 to pass through, and the second support member 12 is slidably disposed in the clearance hole 113a.

[0031] In this embodiment, a slider is provided on the side of the upright plate 111 near the first guide rail 201a. The upright plate 111 is slidably connected to the first guide rail 201a through the slider, thereby driving the entire device to move along the first direction in the die lip adjustment device 200. The first fixing part 112 and the second fixing part 113 are spaced apart along the first direction on the side of the upright plate 111 away from the first guide rail 201a. The first fixing part 112 is used to install the power component 2. The second fixing part 113 is a plate arranged perpendicular to the first direction. The plate has a clearance hole 113a in the first direction so that the end of the second support member 12 near the screw 202c can pass through and slide along the first direction in the clearance hole 113a. At the same time, the clearance hole 113a can also guide the second support member 12 to slide along the first direction, so as to avoid the second support member 12 deviating from the first direction and causing the rotating head 31 to fail to align with the screw 202c.

[0032] See Figure 1 , 3 In one embodiment, the second support member 12 includes a bearing sleeve 121 and a bearing 122. The bearing sleeve 121 is slidably mounted on the second guide rail 114. The bearing sleeve 121 is provided with a guide member 121a extending in a first direction on the side near the first fixing part 112. A second elastic member 13 is sleeved around the guide member 121a. The first fixing part 112 is provided with a through hole 112a for the guide member 121a to pass through on the side near the second fixing part 113. The end of the guide member 121a away from the bearing sleeve 121 is slidably disposed in the through hole 112a. The second elastic member 13 elastically abuts against the bearing sleeve 121 and the first fixing part 112. The bearing 122 is mounted on the bearing sleeve 121, and the rotating component 3 is rotatably mounted on the bearing 122.

[0033] In this embodiment, the bearing sleeve 121 has a mounting cavity for mounting the bearing 122. The bearing 122 is fixedly mounted in the mounting cavity. When the bearing sleeve 121 slides along the second guide rail 114, the bearing 122 can move with the bearing sleeve 121. The bearing 122 has an inner ring and an outer ring capable of relative rotation. Multiple balls are provided between the inner and outer rings to reduce friction generated during mutual rotation, making the rotation of the inner and outer rings smoother. The inner ring is fixedly connected to the rotating assembly 3 and can rotate synchronously with the rotating assembly 3. The outer ring is fixed in the bearing sleeve 121 and is used to move with the bearing sleeve 121 along the first direction, driving the inner ring and the rotating assembly 3 in the inner ring to move synchronously. When the rotating assembly 3 rotates, the inner ring can rotate relative to the outer ring, so that the movement of the rotatable rotating assembly 3 and the non-rotatable second support member 12 is not affected by each other.

[0034] See Figure 1 , 4In one embodiment, the power assembly 2 includes a power component 21 and a transmission shaft 22. The power component 21 has a power shaft 211, and the transmission shaft 22 is drivenly connected to the power shaft 211. The rotating assembly 3 is drivenly connected to the end of the transmission shaft 22 away from the power component 21. The power component 21 uses an electric motor or other electric component. Since the power shaft 211 is usually a thin and relatively smooth metal shaft, it is not conducive to the transmission connection with the rotating assembly 3. The transmission shaft 22 is sleeved around the power shaft 211, which can expand the outer diameter of the power output shaft, thereby increasing the contact area with the power assembly 2. As needed, a protrusion can be provided on the outer wall of the transmission shaft 22, and a groove that mates with the protrusion can be provided on the inner wall of the power assembly 2, thereby increasing the friction and making the transmission structure more stable.

[0035] See Figure 2 , 4 In one embodiment, the rotating assembly 3 includes: a transmission member 32 and a rotating head 31; the transmission member 32 has a fixing hole 321 along a first direction, the fixing hole 321 has a first hole segment 321a and a second hole segment 321b that are axially connected to each other, the first hole segment 321a is located on the side of the second hole segment 321b closer to the power assembly 2, the transmission shaft 22 is inserted into the first hole segment 321a and is connected to the inner wall of the first hole segment 321a; the rotating head 31 is inserted into the end of the second hole segment 321b away from the first hole segment 321a and is connected to the inner wall of the second hole segment 321b; the inner diameter of the second hole segment 321b is smaller than the inner diameter of the first hole segment 321a, so that a limiting step 321c is formed at the junction of the first hole segment 321a and the second hole segment 321b, and the first elastic member 4 elastically abuts against the transmission shaft 22 and the limiting step 321c.

[0036] In this embodiment, the transmission component 32 is used for transmission connection with the transmission shaft 22. Multiple protrusions are spaced circumferentially on the outer wall of the transmission shaft 22. Multiple grooves corresponding to the protrusions are formed circumferentially on the inner wall of the first hole section 321a of the fixing hole 321. When the transmission shaft 22 is inserted into the first hole section 321a, the multiple protrusions are inserted one-to-one into the multiple grooves, thereby achieving the transmission connection between the transmission shaft 22 and the transmission component 32. The limiting step 321c is used to limit the axial position of the transmission shaft 22 in the first hole section 321a, preventing the transmission shaft 22 from extending too far into the fixing hole 321, which would cause the end of the rotating component 3 near the transmission shaft 22 to touch the structure of other parts, thus affecting the rotation of the rotating component 3. The limiting step 321c also provides an abutment surface for the first elastic member 4, facilitating the installation of the first elastic member 4 between the rotating component 3 and the power component 2. The rotating head 31 is mounted in the fixing hole 321 of the transmission member 32 by fasteners and is mounted at the end of the second hole section 321b away from the first hole section 321a. One end of the rotating head 31 extends into the second hole section 321b. The fasteners can contract and change the inner diameter of the second hole section 321b of the transmission member 32, thereby tightening and securing one end of the rotating head 31 in the second hole section 321b. The other end of the rotating head 31 extends out of the rotating assembly 3 to act on the screw 202c.

[0037] See Figure 2 , 4 In one embodiment, the outer wall of the rotating head 31 has a first insertion hole 311 radially formed, and the inner wall of the fixing hole 321 has a second insertion hole radially formed. The first insertion hole 311 communicates with the second insertion hole. The rotating assembly 3 also includes a pin, which is inserted into the first insertion hole 311 and the second insertion hole. The pin is used to improve the stability of the connection between the rotating shaft and the transmission component 32, and to prevent slippage between the rotating shaft and the transmission component 32, which would prevent the screw 202c from being turned even when rotating.

[0038] In one embodiment, a limiting hole 221 is provided on the side of the drive shaft 22 near the drive component 32, and the limiting hole 221 extends along a first direction; the rotating component 3 also includes a guide rod 33, one end of which is fixedly installed in the second hole section 321b, and the other end is slidably disposed in the limiting hole 221. The first elastic member 4 surrounds the guide rod 33. The guide rod 33 is used to guide the extension and retraction direction of the first elastic member 4 to ensure that the first elastic member 4 can elastically extend and retract between the rotating component 3 and the power component 2 along the first direction, and to avoid the extension direction of the first elastic member 4 deviating during the extension or retraction process, which would result in the inability to buffer the rigid connection between the rotating head 31 and the screw 202c.

[0039] This utility model also proposes a die lip adjustment device 200, which includes a frame 201, a die lip 202, and a screw-driving device 100. The specific structure of the screw-driving device 100 is as described in the above embodiments. Since this die lip adjustment device 200 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The frame 201 has a first guide rail 201a and a third guide rail 201b. The first guide rail 201a extends along a first direction, and the third guide rail 201b extends along a second direction. The first guide rail 201a is slidably mounted on the third guide rail 201b. The first direction intersects the second direction. The die lip 202 is mounted on the frame 201 and includes an upper die head 202a and a lower die head 202b. An opening for extruding raw materials is formed between the upper die head 202a and the lower die head 202b. 2. A row of adjustment holes spaced apart along the second direction is provided. Screws 202c are provided in the adjustment holes. The size of the opening formed between the upper die head 202a and the lower die head 202b is adjusted by the screws 202c. The screw-driving device 100 is any of the above screw-driving devices 100. The screw-driving device 100 is slidably mounted on the first guide rail 201a through the bracket 1. The screw-driving device 100 is used to adjust the screw depth of the screw 202c in the threaded hole, so as to adjust the opening between the upper die head 202a and the lower die head 202b.

[0040] See Figure 2 , 5In this embodiment, the die lip 202 is used to extrude unformed plastic raw material after heating. The molten plastic is extruded from the opening between the upper die head 202a and the lower die head 202b. The upper die head 202a is provided with multiple adjustment holes at intervals. The inner wall of the adjustment hole is threaded. Each adjustment hole is provided with a screw 202c. The screw 202c can move axially in the adjustment hole through the thread. When the screw 202c is screwed in, the opening between the upper die head 202a and the lower die head 202b decreases, and the opening of the die lip 202 decreases, so that less plastic is extruded. When the screw 202c is screwed out, the opening between the upper die head 202a and the lower die head 202b increases, and the opening of the die lip 202 increases, so that more molten plastic is extruded. The screw-driving device 100 is slidably mounted on the first guide rail 201a via a bracket 1, and then slidably mounted on the third guide rail 201b via the first guide rail 201a. Specifically, a slidable slider is provided on the third guide rail 201b, the first guide rail 201a is located on the slider, and the screw-driving device 100 is located on the first guide rail 201a via the bracket 1. The screw-driving device 100 adjusts its position on the third guide rail 201b to suspend itself above the screw 202c to be adjusted. By sliding on the first guide rail 201a, it screws the screw 202c to a preset depth. This process is repeated until all screws 202c on the upper die head 202a are screwed to preset positions, thereby adjusting the opening of the die lip 202. The screw-driving device 100 has a first elastic element 4 and a second elastic element 13, which can buffer the rigid collision between the rotating head 31 and the screw 202c, thereby preventing damage to components and extending the service life of the die lip adjustment device 200.

[0041] This utility model also proposes an injection molding machine, including the above-mentioned mold lip adjustment device 200. By setting the mold lip adjustment device 200, the injection molding machine can adjust the opening of the mold lip 202, and can buffer the rigid collision between the rotating head 31 and the screw 202c by the elastic element in the screw-driving device 100, thereby avoiding damage to the parts by collision and extending the service life of the injection molding machine.

[0042] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A screwing device for a die lip adjustment apparatus, characterized by, The screw-driving device includes: A bracket for slidably mounting on the die lip adjustment device; The power unit is mounted on the bracket; A rotating assembly, drively connected to the power assembly, has a rotating head for tightening screws, the rotating head being located at the end of the rotating assembly away from the power assembly. The power assembly drives the rotating assembly to rotate, causing the rotating head to tighten the screw to a preset position, thereby allowing the die lip adjustment device to adjust the opening of the die lip; and A first elastic element is elastically abutted between the rotating assembly and the power assembly in a first direction, and the first elastic element is used to provide a force that causes the rotating assembly to move away from the power assembly.

2. The screw driving device of claim 1 wherein, The support includes: A first support member is slidably mounted on the die lip adjustment device along a first direction, and the power component is mounted on the first support member; The second support member is slidably mounted on the first support member along the first direction, and the rotating component is rotatably disposed on the second support member; The second elastic member extends along the first direction and elastically abuts against the first support member and the second support member.

3. The screwing device according to claim 2, wherein The die lip adjusting device has a first guide rail extending along a first direction, and the first support member includes: A vertical plate, for slidably mounted on the first guide rail; The first fixing part is provided on the side of the upright plate away from the first guide rail, and the power component is installed on the first fixing part; The second fixing part is disposed on the side of the upright plate opposite to the first guide rail, and the second fixing parts are spaced apart along the first direction on the side of the first fixing part near the screw; and The second guide rail extends along the first direction and is disposed between the first fixing part and the second fixing part, and the second support member is slidably mounted on the second guide rail; The second fixing part has a clearance hole for the second support member to pass through, and the second support member is slidably inserted into the clearance hole.

4. The screwing device according to claim 3, wherein The second support member includes: A bearing sleeve is slidably mounted on the second guide rail. The bearing sleeve has a guide extending in a first direction on the side near the first fixing part. The second elastic member is sleeved around the guide. The first fixing part has a through hole for the guide to pass through on the side near the second fixing part. The end of the guide away from the bearing sleeve is slidably disposed in the through hole. The second elastic member elastically abuts against the bearing sleeve and the first fixing part. A bearing is mounted on the bearing sleeve, and the rotating assembly is rotatably inserted through the bearing.

5. The screwing device according to any one of claims 1 to 4, wherein The power assembly includes a power component and a drive shaft. The power component has a power shaft, and the drive shaft is driven to the power shaft. The rotating component is driven to the end of the drive shaft away from the power component.

6. The screw driving device of claim 5, wherein The rotating component includes: A transmission component, wherein a fixing hole is formed along a first direction, the fixing hole having a first hole section and a second hole section that are interconnected along the axial direction, the first hole section being located on the side of the second hole section closer to the power component, the transmission shaft being inserted into the first hole section and being connected to the inner wall of the first hole section in a transmission manner. A rotating head is inserted at the end of the second hole segment away from the first hole segment and is connected to the inner wall of the second hole segment in a transmission manner. The inner diameter of the second hole is smaller than that of the first hole, so that a limiting step is formed at the junction of the first hole and the second hole, and the first elastic element elastically abuts against the drive shaft and the limiting step.

7. The screw driving device of claim 6 wherein, The outer wall of the rotating head has a first insertion hole in the radial direction, and the inner wall of the fixing hole has a second insertion hole in the radial direction. The first insertion hole is connected to the second insertion hole. The rotating assembly also includes a pin, which is inserted into the first insertion hole and the second insertion hole.

8. The screw driving device of claim 6, wherein The drive shaft has a limiting hole on the side near the drive member, and the limiting hole extends along a first direction; the rotating assembly also includes a guide rod, one end of which is fixedly installed in the second hole section, and the other end is slidably disposed in the limiting hole, and the first elastic member surrounds the guide rod.

9. A die lip adjustment apparatus characterized by, include: The frame has a first guide rail and a third guide rail, the first guide rail extends along a first direction, the third guide rail extends along a second direction, the first guide rail is slidably mounted on the third guide rail, and the first direction intersects the second direction; A die lip is installed on the frame. The die lip includes an upper die head and a lower die head. An opening for extruding raw materials is formed between the upper die head and the lower die head. The die lip is provided with a row of adjustment holes spaced apart along a second direction. Screws are provided in the adjustment holes. The size of the opening formed between the upper die head and the lower die head is adjusted by the screws. A screw-driving device, wherein the screw-driving device is as described in any one of claims 1 to 8, the screw-driving device is slidably mounted on the first guide rail via the bracket, and the screw-driving device is used to adjust the screw-in depth in the threaded hole to adjust the opening of the upper die head and the lower die head.

10. An injection molding machine characterized by, Includes the die lip adjustment device as described in claim 9.

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