In-mold pulling device

Abstract

The application relates to an in-mold pulling device, which comprises a feeding assembly, a switching assembly and a transmission assembly. The feeding assembly comprises a feeding block and a feeding needle movably installed on the feeding block. The feeding needle has a first position for plugging with a material belt and a second position for being arranged apart from the material belt. The switching assembly is connected with the feeding needle and drives the feeding needle to switch between the first position and the second position. The transmission assembly is connected with the feeding block and drives the feeding block and the feeding needle to reciprocate between a feeding starting position and a feeding ending position. During the resetting of the feeding needle, the switching assembly drives the feeding needle to move from the first position to the second position, so that the feeding needle is first lowered below the material belt and separated from the material belt, and then the feeding needle is lifted to the first position and plugged with a positioning hole below the material belt, so that the feeding needle is prevented from contacting the material belt during the resetting, the material belt is prevented from being abraded, and the production quality of products is improved.

Description

Technical Field

[0001] This application belongs to the technical field of workpiece stamping equipment, and specifically relates to an in-die material pulling device. Background Technology

[0002] In the field of stamping, existing in-mold drawing devices drive the drawing claws to reciprocate through the opening and closing of the mold. During the feeding process, the drawing claws insert into the positioning holes of the material to move the material. During the resetting process, the drawing claws need to be pulled out of the positioning holes of the material. Usually, the pulling claws are pulled out through elastic contact with the material. However, the elastic contact between the drawing claws and the material is very likely to scratch the surface of the material, especially for thinner and softer materials, which will affect the product quality. Utility Model Content

[0003] The purpose of this application is to provide an in-mold material pulling device, which aims to improve the production quality of products.

[0004] To achieve the above objectives, this application provides an in-mold material pulling device, comprising:

[0005] A feeding assembly includes a feeding block and a feeding needle movably mounted on the feeding block, the feeding needle having a first position for inserting into a material strip and a second position spaced apart from the material strip;

[0006] A switching component is connected to the feed needle and drives the feed needle to switch between the first position and the second position;

[0007] A transmission assembly is connected to the feeding block and drives the feeding block and the feeding needle to reciprocate between the feeding start position and the feeding end position.

[0008] In some embodiments, the switching component includes a lifting block movably mounted on the feeding block, a lifting track is formed on the lifting block, and a moving part is formed on the feeding needle that is movably connected to the lifting track. The lifting block drives the moving part to move along the lifting track and realizes the switching of the feeding needle between the first position and the second position.

[0009] The lifting track includes a high position and a low position. When the moving part moves to the high position, the feeding needle is located at the first position. When the moving part moves to the low position, the feeding needle is located at the second position.

[0010] In some embodiments, the switching component further includes a first lever and a second lever, wherein the first lever is relatively close to the feeding termination position along the moving direction of the feeding block, and the second lever is relatively close to the feeding start position along the moving direction of the feeding block, wherein the first lever is located on the side relatively close to the lower part and can push the lifting block away from the first lever, and the second lever is located on the side relatively close to the higher part and can push the lifting block away from the second lever.

[0011] In some embodiments, at least one of the first paddle block and the lifting block has a first inclined surface formed thereon, and the first paddle block and the lifting block are connected by the first inclined surface as a contactable engagement structure. At least one of the second paddle block and the lifting block has a second inclined surface formed thereon, and the second paddle block and the lifting block are connected by the second inclined surface as a contactable engagement structure.

[0012] In some embodiments, the first push block has a first groove formed on the side near the feeding block. The first groove includes a first inlet and a first outlet with a height difference. The first inlet is located on the side near the feeding start position, and the first outlet is located on the side near the feeding end position. The first inlet is lower than the first outlet. The feeding assembly also includes a push rod movably mounted on the feeding block. The push rod is at the same height as the first inlet.

[0013] In some embodiments, the first push block has a second groove at the same height as the first inlet on the side near the feeding block. The second groove includes a second inlet and a second outlet, and the depth of the second groove gradually decreases from the second inlet to the second outlet. The second outlet is not connected to the first inlet. The push rod is telescopically engaged with the feeding block and can contact the bottom wall of the second groove.

[0014] In some embodiments, a first elastic reset member is provided between the push rod and the feeding block;

[0015] In some embodiments, a second resilient reset member is connected to the bottom of the first lever.

[0016] In some embodiments, the transmission assembly includes:

[0017] A gearbox, comprising a large gear and a small gear connected coaxially;

[0018] A pusher rack, one end of which meshes with the large gear, and the other end of which is connected to the feeding block;

[0019] The transmission rack meshes with the pinion.

[0020] In some embodiments, the transmission assembly further includes:

[0021] The slider is connected to the end of the transmission rack away from the pinion;

[0022] The upper insert is connected to the upper mold drive, and a third inclined surface is formed on at least one of the upper insert and the slider, and the upper insert and the slider are connected by the third inclined surface as a contactable mating structure.

[0023] In some embodiments, the transmission assembly further includes a stroke adjusting rod and a starting position adjusting rod, wherein the stroke adjusting rod is movably connected to the other end of the upper insert knife away from the slider, and the starting position adjusting rod is movably connected to the slider.

[0024] The in-mold material pulling device provided in this application has the following beneficial effects through the above technical solution:

[0025] When the feeding needle is in the first position, it engages with the material belt. When the feeding needle is in the second position, it separates from the material belt and is located below it. During the process of the transmission component driving the feeding needle from the feeding start position to the feeding end position, the feeding needle remains in the first position. During the reset process of the transmission component driving the feeding block and the feeding needle from the feeding end position to the feeding start position, the switching component drives the feeding needle to move from the first position to the second position and then from the second position to the first position to lower the feeding needle below the material belt and then raise it to engage with the next positioning hole of the material belt. This avoids contact between the feeding needle and the material belt during the reset process, thereby preventing wear on the material belt and improving the production quality of the product.

[0026] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0028] Figure 1 This is a schematic diagram of an in-mold feeding device (without a mold) according to a specific embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the lifting moving block and the feeding needle according to a specific embodiment of this application;

[0030] Figure 3 This is a schematic diagram of the feeding block according to a specific embodiment of this application;

[0031] Figure 4 This is a schematic diagram illustrating the cooperation between the lifting moving block and the first actuating block (feeding process) in a specific embodiment of this application;

[0032] Figure 5 This is a schematic diagram illustrating the cooperation between the lifting moving block and the first toggle block (reset process) according to a specific embodiment of this application;

[0033] Figure 6 This is a schematic diagram illustrating the cooperation between the lifting moving block and the second moving block according to a specific embodiment of this application.

[0034] Explanation of reference numerals in the attached figures

[0035] 100. In-mold material pulling device; 200. Material strip; 10. Feeding assembly; 11. Feeding block; 12. Feeding needle; 121. Moving part; 13. Push rod; 14. First elastic reset member; 20. Switching assembly; 21. Lifting block; 211. Lifting rail; 2111. High position part; 2112. Low position part; 212. Limiting groove; 22. First push block; 221. First inclined surface; 222. First groove; 2221. First 2222, First outlet; 223, Second groove; 2231, Second inlet; 2232, Second outlet; 23, Second lever; 231, Second inclined plane; 24, Second elastic reset component; 30, Transmission assembly; 31, Push rack; 32, Transmission rack; 33, Slider; 34, Upper insert knife; 35, Stroke adjustment rod; 36, Starting position adjustment rod; 37, Third elastic reset component; 40, Base; 50, Limiting rod. Detailed Implementation

[0036] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0037] The terminology of the in-mold drawing device according to this application is described below with reference to the accompanying drawings.

[0038] like Figure 1 and Figure 2As shown, a specific embodiment of this application provides an in-mold feeding device 100, including a feeding assembly 10, a switching assembly 20, and a transmission assembly 30. The feeding assembly 10 includes a feeding block 11 and a feeding needle 12 movably mounted on the feeding block 11. The feeding needle 12 has a first position for inserting into the material strip 200 and a second position spaced apart from the material strip 200. The switching assembly 20 is connected to the feeding needle 12 and drives the feeding needle 12 to switch between the first position and the second position. The transmission assembly 30 is connected to the feeding block 11 and drives the feeding block 11 and the feeding needle 12 to reciprocate between the feeding start position and the feeding end position.

[0039] The in-mold feeding device 100, as a core component of the stamping equipment, functions to convey the strip 200. Specifically, the transmission assembly 30 drives the feeding block 11 from the feeding start position to the feeding end position to complete one feeding cycle. After completing one feeding cycle, the transmission assembly 30 drives the feeding block 11 back from the feeding end position to the feeding start position to complete one reset. During the feeding process, the feeding needle 12 is located in the first position to engage with one of the positioning holes of the strip 200 and continuously pulls the strip 200. The feed pin 12 moves from the feeding start position to the feeding end position. During the reset process, the switching component 20 drives the feeding pin 12 to move from the first position to the second position so that the feeding pin 12 separates from the feed strip 200 and descends below the feed strip 200. At the same time, the transmission component 30 drives the feeding block 11 and the feeding pin 12 to return from the feeding end position to the feeding start position. Then, the switching component 20 drives the feeding pin 12 to move from the second position to the first position so that the feeding pin 12 re-engages with the next positioning hole of the feed strip 200. In this application, the cooperation between the switching component 20 and the feeding pin 12 ensures that the feeding pin 12 does not come into contact with the feed strip 200 during the reset process, thereby avoiding wear on the feed strip 200 caused by contact, and thus avoiding poor product quality caused by wear, i.e., improving product quality.

[0040] Specifically, the in-mold feeding device 100 is used to convey the material strip 200 along its length. The material strip 200 has multiple positioning holes arranged at intervals along its length. The feeding needle 12 is used to insert and cooperate with one of the positioning holes. During the feeding process, the feeding needle 12 contacts the hole wall of the positioning hole and drags the material strip 200 to the feeding end position. After resetting, the feeding needle 12 inserts into another positioning hole, and the distance between the positioning hole and the original positioning hole is one feeding stroke. The above process is repeated to continuously convey the material strip 200 along its length to the feeding end position for stamping.

[0041] Furthermore, when the feeding needle 12 is in the first position, it can be inserted upward into the positioning hole so that the feeding needle 12 can abut against the wall of the positioning hole; when the moving part 121 is in the second position, the feeding needle 12 can be pulled downward out of the positioning hole and form a gap with the material belt 200 so as to avoid the feeding needle 12 from contacting the material belt 200. This can be achieved by setting the height difference between the first position and the second position.

[0042] It should be noted that, in the description of this application, unless otherwise stated, the terms "upper," "lower," "left," "right," "front," "back," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] like Figure 1 , Figure 2 and Figure 5 As shown, in some embodiments, the switching component 20 includes a lifting block 21 movably mounted on the feeding block 11. A lifting track 211 is formed on the lifting block 21, and a moving part 121 movably connected to the lifting track 211 is formed on the feeding needle 12. The lifting block 21 drives the moving part 121 to move along the lifting track 211 and realize the switching of the feeding needle 12 between a first position and a second position. The lifting track 211 includes a high position 2111 and a low position 2112. When the moving part 121 moves to the high position 2111, the feeding needle 12 is located in the first position. When the moving part 121 moves to the low position 2112, the feeding needle 12 is located in the second position.

[0044] The transmission component 30 linearly drives the feeding block 11 and the feeding needle 12 to move between the feeding start position and the feeding end position. The switching component 20 pushes the lifting block 21 to move the moving part 121 along the lifting track 211, thereby causing the feeding needle 12 to extend and retract. The extension and retraction direction of the feeding needle 12 is up and down, the movement direction of the lifting block 21 is forward and backward, and the movement direction of the feeding block 11 is left and right.

[0045] Specifically, the high position 2111 is located at the rear end of the lifting block 21, and the low position 2112 is located at the front end of the lifting block 21. The lifting block 21 moves forward so that the moving part 121 moves to the high position 2111, and the corresponding feeding needle 12 extends upward to the first position to engage with the material belt 200. At the same time, the lifting block 21 extends the feeding block 11 forward. The lifting block 21 moves backward so that the moving part 121 moves to the low position 2112, and the corresponding feeding needle 12 retracts downward to the second position to separate from the material belt 200. At the same time, the lifting block 21 extends the feeding block 11 backward.

[0046] Furthermore, the process of the feeding block 11 moving to the right from the feeding start position to the feeding end position is the feeding process, and the rightward direction is the feeding direction of the feeding block 11; the process of the feeding block 11 moving to the left from the feeding end position to the feeding start position is the reset process, and the leftward direction is the reset direction of the feeding block 11.

[0047] It should be noted that, apart from the aforementioned transmission component 30 driving the feeding block 11 along a straight line, the transmission component 30 driving the feeding block 11 to move back and forth between the feeding start position and the feeding end position along any path is within the scope of protection of this application, such as curves, straight lines and combinations of curves.

[0048] like Figure 3 As shown, in some embodiments, the feeding block 11 has a first channel extending in the vertical direction and a second channel extending in the front-back direction. The first channel and the second channel are interconnected in the left-right direction. The feeding needle 12 is movably installed in the first channel, and the lifting block 21 is movably installed in the second channel. In other words, the feeding block 11, the lifting block 21, and the feeding needle 12 are integrated, and the feeding block 11 provides a limit for the movement of the lifting block 21 and the feeding needle 12, which facilitates the assembly of the feeding assembly 10 and improves the stability of the movement of the lifting block 21 and the feeding needle 12.

[0049] Furthermore, the in-mold feeding device 100 also includes a base 40, on which a sliding groove extending along the movement direction of the feeding block 11 is formed. The bottom of the feeding block 11 slides in conjunction with the sliding groove. The switching component 20 is mounted on the base 40, and the transmission component 30 is disposed on one side of the base 40 and connected to one side of the feeding block 11. In other words, the sliding groove provides a limit for the movement of the feeding block 11, which is beneficial to the stability of the movement of the feeding block 11.

[0050] It is evident that this application can improve the accuracy of the conveyor belt 200 by enhancing the stability of the feeding block 11, the lifting block 21, and the feeding needle 12.

[0051] Optionally, such as Figure 2 , Figure 5 , Figure 6As shown, a lifting track 211 is formed on one side of the lifting block 21, a moving part 121 is formed on one side of the feeding needle 12, and a limiting groove 212 extending in the vertical direction is formed on the other side of the lifting block 21. A limiting rod 50 extending in the vertical direction is also inserted into the feeding block 11. The limiting rod 50 extends into the second channel and cooperates with the limiting groove 212 to limit the range of movement of the lifting block 21 in the front-back direction. In other words, the limiting rod 50 and the rear wall of the limiting groove 212 are connected. The corresponding lifting block 21 moves forward and the feeding needle 12 moves to the first position. The limiting rod 50 and the front groove wall of the limiting groove 212 abut against the corresponding lifting block 21 and move backward, and the feeding needle 12 moves to the second position. At the same time, the size design of the limiting rod 50 and the limiting groove 212 determines the maximum forward extension distance of the feeding block 11 that can extend forward beyond the lifting block 21 and the maximum backward extension distance of the feeding block 11 that can extend backward beyond the lifting block 21.

[0052] like Figure 1 , Figures 4 to 6 As shown, in some embodiments, the switching component 20 further includes a first lever 22 and a second lever 23. The first lever 22 is relatively close to the feeding termination position along the moving direction of the feeding block 11, and the second lever 23 is relatively close to the feeding start position along the moving direction of the feeding block 11. The first lever 22 is located on the side relatively close to the lower part 2112 and can push the lifting block 21 away from the first lever 22. The second lever 23 is located on the side relatively close to the higher part 2111 and can push the lifting block 21 away from the second lever 23. In other words, in this application, the raising and lowering of the feeding needle 12 is achieved by the mechanical collision between the first lever 22 and the second lever 23 and the lifting block 21. It can be seen that the raising and lowering of the feeding needle 12 is achieved by a purely mechanical structure, which helps to reduce the production cost of the in-mold feeding device 100.

[0053] In some embodiments, at least one of the first lever block 22 and the lifting moving block 21 has a first inclined surface 221 formed thereon, and the first lever block 22 and the lifting moving block 21 are connected by the first inclined surface 221 as a contactable engagement structure. At least one of the second lever block 23 and the lifting moving block 21 has a second inclined surface 231 formed thereon, and the second lever block 23 and the lifting moving block 21 are connected by the second inclined surface 231 as a contactable engagement structure.

[0054] Optionally, the first actuating block 22 has a first protrusion on the side near the lifting block 21, and the first protrusion has a first inclined surface 221. The first inclined surface 221 is used to move and cooperate with the front end of the lifting block 21, and the first inclined surface 221 gradually approaches the feeding block 11 from right to left. The second actuating block 23 has a second protrusion on the side near the lifting block 21, and the second protrusion has a second inclined surface 231. The second inclined surface 231 is used to move and cooperate with the rear end of the lifting block 21, and the second inclined surface 231 gradually approaches the feeding block 11 from right to left. Those skilled in the art will understand that the front and rear ends of the lifting block 21 near the first actuating block 22 and the second actuating block 23 can also form inclined surfaces, as long as the first actuating block 22 and the second actuating block 23 can push the lifting block 21 to move back and forth when they contact the front and rear ends of the lifting block 21 respectively. When the first inclined plane is provided at the front end of both the first moving block 22 and the lifting moving block 21, the maximum distance that the lifting moving block 21 can move backward is the sum of the lengths of the two first inclined planes.

[0055] It should be noted that the distance between the feeding end position and the feeding start position in the left and right direction is the feeding stroke. The feeding stroke is set by the transmission component 30. The feeding stroke is generally an integer multiple of the hole spacing between two adjacent positioning holes on the material belt 200. In this application, the hole spacing between two adjacent positioning holes is used as the feeding stroke. In the same feeding reset process, the feeding needle 12 first engages with the original positioning hole and then engages with the new positioning hole.

[0056] During the feeding process, the feeding needle 12 first moves to the right until it abuts against the right wall of the original positioning hole, and then pulls the material belt 200 to the right by one feeding stroke to reach the feeding end position; during the resetting process, the feeding needle 12 first moves to the left and is pulled out of the original positioning hole before abutting against the left wall of the original positioning hole, then moves to the left below the new positioning hole, and finally inserts into the new positioning hole before the feeding needle 12 reaches the feeding start position.

[0057] Furthermore, the first inclined plane 221 needs to push the lifting block 21 backward to move the moving part 121 from the high position 2111 to the low position 2112, and the second inclined plane 231 needs to push the lifting block 21 forward to move the moving part 121 from the low position 2112 to the high position 2111. In other words, the length of the first inclined plane 221 is equal to the distance the lifting block 21 moves backward; the length of the second inclined plane 231 is equal to the distance the lifting block 21 moves forward.

[0058] Simultaneously, the positions of the first lever 22 and the second lever 23 relative to the feeding block 11 need to be set so that when the lifting block 21 is at its foremost position, the front end face of the lifting block 21 can contact the first inclined surface 221, and when the lifting block 21 is at its last position, the rear end face of the lifting block 21 can contact the second inclined surface 231, thereby enabling the lifting block 21 to move back and forth. Those skilled in the art will understand that the longer the contact length between the front and rear ends of the lifting block 21 and the first inclined surface 221 and the second inclined surface 231, respectively, the longer the forward and backward movement distance of the lifting block 21.

[0059] Optionally, the removal of the feeding needle 12 is completed when the left side wall of the feeding needle 12 moves to be aligned with the left wall of the original positioning hole in the vertical direction, and the insertion of the feeding needle 12 is completed when the feeding needle 12 moves to be aligned with the left wall of the new positioning hole in the vertical direction. In other words, the distance between the left and right edges of the first inclined surface 221 in the left and right directions is less than or equal to the diameter of the original positioning hole in the left and right directions, and the distance between the left and right edges of the second inclined surface 231 in the left and right directions is less than or equal to the diameter of the new positioning hole in the left and right directions.

[0060] Meanwhile, the different lengths of the first inclined surface 221 and the second inclined surface 231 need to be correspondingly set in the left and right directions of the first dial block 22 and the second dial block 23 so that the pulling out and insertion of the feeding needle 12 can be completed within the length range of the left and right directions of a positioning hole.

[0061] This configuration makes the first pusher block 22, the second pusher block 23 and the feeding block 11 smaller in size and more compact in arrangement, thereby reducing the structural size of the in-mold material pulling device 100, which is beneficial to the cost reduction and assembly of the in-mold material pulling device 100.

[0062] like Figure 1 , Figures 4 to 6 As shown, in some embodiments, the first push block 22 is movable and has a first groove 222 formed on the side near the feeding block 11. The first groove 222 includes a first inlet 2221 and a first outlet 2222 with a height difference. The first inlet 2221 is located on the side near the feeding start position, and the first outlet 2222 is located on the side near the feeding end position. The first inlet 2221 is lower than the first outlet 2222. The feeding assembly 10 also includes a push rod 13 movably mounted on the feeding block 11. The push rod 13 is at the same height as the first inlet 2221.

[0063] In fact, during the feeding process, the feeding needle 12 is always in the first position, that is, the lifting block 21 extends forward beyond the feeding block 11. In other words, the lifting block 21 will interfere with the first protrusion on the first deflector block 22 during the feeding process. In this application, by setting the push rod 13 to move in cooperation with the first groove 222 on the first deflector block 22, the feeding block 11 drives the first protrusion to descend as it passes the first deflector block 22, so as to avoid interference between the lifting block 21 and the first protrusion. This ensures that the feeding needle 12 pulls the material strip 200 to the right by one feeding stroke to reach the feeding termination position, thereby improving the reliability of the in-mold feeding device 100.

[0064] Specifically, the height difference between the first inlet 2221 and the first outlet 2222 is greater than or equal to the height difference between the top surface of the first lever 22 and the bottom surface of the lifting block 21, so that when the push rod 13 is located at the first outlet 2222, it can drive the top surface of the first lever 22 to be below the bottom surface of the lifting block 21.

[0065] Furthermore, the first inlet 2221 and the push rod 13 are located on the same horizontal plane, that is, the feeding block 11 can move to the right and enter the first groove 222 from the first inlet 2221; the bottom of the first lever block 22 is connected to the second elastic reset member 24, so that when the push rod 13 moves from the first inlet 2221 to the first outlet 2222, it drives the first lever block 22 to descend. After the push rod 13 continues to leave the first groove 222 from the first outlet 2222 to the right, the first lever block 22 rises and resets under the action of the second elastic reset member 24.

[0066] like Figure 1 , Figures 4 to 6 As shown, in some embodiments, the first pusher block 22 near the feeding block 11 also forms a second groove 223 at the same height as the first inlet 2221. The second groove 223 includes a second inlet 2231 and a second outlet 2232, and the depth of the second groove 223 gradually decreases from the second inlet 2231 to the second outlet 2232. The second outlet 2232 is not connected to the first inlet 2221. The push rod 13 is telescopically engaged with the feeding block 11 and can contact the bottom wall of the second groove 223.

[0067] In fact, during the reset process, the first inclined surface 221 on the first lever 22 is used to push the lifting block 21, meaning the push rod 13 does not need to press down on the first lever 22. However, the push rod 13 always extends forward beyond the feeding block 11. In other words, the push rod 13 will interfere with the first lever 22 during the reset process. In this application, a second groove 223 at the same height as the first inlet 2221 is formed on the side of the first lever 22 near the feeding block 11. The second groove 223 includes a second inlet 2231 and a second outlet 2232, and the depth of the second groove 223 gradually decreases from the second inlet 2231 to the second outlet 2232. The second outlet 2232 is not connected to the first inlet 2221. Thus, the push rod 13 can first enter the second groove 223 from the second inlet 2231 during the reset process. By setting one end of the push rod 13 to telescopically engage with the feeding block 11, and the other end to contact the gradually decreasing depth of the second groove 223, the reset process can be completed. The push rod 13 is pushed back by the bottom wall of the second groove 223 during the process of passing the first push block 22 and leaves the second groove 2232 from the second outlet 2232, so as to avoid interference between the push rod 13 and the first push block 22. Moreover, the second outlet 2232 is not connected to the first inlet 2221, which can ensure that when the push rod 13 enters from the first inlet 2221 in the next feeding, it moves along the trajectory of the first groove 222 and will not enter the second groove 223. This ensures that the feeding block 11 moves to the left by one feeding stroke and returns to the feeding start position, and the above feeding and resetting process can be repeated continuously, thereby improving the reliability of the in-mold material pulling device 100.

[0068] Furthermore, a first elastic reset member 14 is provided between the push rod 13 and the feeding block 11. The first elastic reset member 14 can provide a forward reset force. After the push rod 13 leaves the second outlet 2232 of the second groove 223 and enters the first inlet 2221, the push rod 13 is reset forward under the action of the first elastic reset member 14, and then leaves the first push block 22 from the first inlet 2221.

[0069] In this application, the repeated action of the first push block 22 and the push rod 13 is achieved by setting up mechanical structures such as the first elastic reset member 14 and the second elastic reset member 24, thereby making it suitable for the repeated pulling action of the in-mold material pulling device 100 and reducing the production cost of the in-mold material pulling device 100.

[0070] like Figure 1As shown, in some embodiments, the transmission assembly 30 includes a gearbox, a pusher rack 31, and a transmission rack 32. The gearbox includes a large gear and a small gear coaxially connected; the pusher rack 31 meshes with the large gear and is connected to the feeding block 11; the transmission rack 32 meshes with the small gear. In this application, a small input distance to the transmission rack 32 can be amplified into a larger output distance to the pusher rack 31 through the coaxial rotation of the small gear and the large gear. In other words, the transmission assembly 30 of this application has a high transmission ratio. Therefore, the in-mold material pulling device 100 can meet the requirements of a large feeding stroke, thereby improving the practicality of the in-mold material pulling device 100.

[0071] Specifically, the pusher rack 31 extends in the left-right direction, and the large gear and small gear are arranged coaxially in the front-back direction. The left end of the pusher rack 31 is connected to the right end of the feeding block 11, and the bottom surface of the right end of the pusher rack 31 meshes with the large gear. One end of the transmission rack 32 meshes with the small gear, and the other end of the transmission rack 32 serves as the distance input end of the transmission assembly 30. Those skilled in the art will understand that the transmission rack 32 can be arranged parallel to or perpendicular to the pusher rack 31, as long as the transmission rack 32 meshes with the small gear.

[0072] It should be noted that the number of teeth and diameter of the large gear and small gear, as well as the number of teeth on the push rack 31 and the transmission rack 32, are well known to those skilled in the art and are not part of the core inventive points of this application, so they will not be elaborated here.

[0073] like Figure 1 As shown, in some embodiments, the transmission assembly 30 further includes a slider 33 and an upper insert 34, wherein the slider 33 is fixedly connected to the end of the transmission rack 32 away from the pinion; the upper insert 34 is driven to the upper mold, and a third inclined surface is formed on at least one of the slider 33 and the upper insert 34, and the slider 33 and the upper insert 34 are connected by the third inclined surface as a contactable mating structure.

[0074] Specifically, the upper insert 34 has a third inclined surface on the side near the slider 33. As the upper insert 34 moves downward, the bottom of the upper insert 34 can contact and engage with the right edge of the top surface of the slider 33 to push the slider 33 to the left and drive the transmission rack 32 to move.

[0075] Furthermore, a chamfer structure is formed on the top surface of the slider 33, and the chamfer structure moves in conjunction with the bottom of the upper insert 34 to make the movement of the slider 33 and the bottom of the upper insert 34 smoother.

[0076] Optionally, a third elastic reset member 37 is provided at the left end of the slider 33. After the upper insert 34 pushes the slider 33 to move to the left, the third elastic reset member 37 applies a rightward reset force to the slider 33. After the upper insert 34 separates from the top of the slider 33, the third elastic reset member 37 resets the slider 33 to the right, thus making it suitable for the repeated pulling action of the in-mold pulling device 100, thereby reducing the production cost of the in-mold pulling device 100.

[0077] like Figure 1 As shown, in some embodiments, the transmission assembly 30 further includes a stroke adjustment rod 35 that moves in cooperation with the end of the upper insert 34 away from the slider 33, and a starting position adjustment rod 36 that is movably connected to the slider 33, so as to adjust the relative position of the upper insert 34 and the slider 33, thereby avoiding the influence of workpiece processing errors on the feeding stroke, and thus improving the accuracy of the in-mold material pulling device 100.

[0078] Specifically, the end of the stroke adjustment rod 35 near the upper insert 34 has a beveled structure. The position of the upper insert 34 in the up-down direction can be adjusted by pulling the stroke adjustment rod 35 back and forth in the left-right direction. The starting position adjustment rod 36 is threaded with the mold. The position of the slider 33 in the left-right direction can be adjusted by screwing the starting position adjustment rod 36 back.

[0079] The working principle of the in-mold material pulling device 100 of this application is as follows:

[0080] Feeding process: First, the upper inserter 34 moves downward, pushing the slider 33 to the left. Through the transmission rack 32, pinion, gear and pusher rack 31, the transmission distance is amplified and input to the feeding block 11, so that the feeding block 11 moves to the right from the feeding start position. At the same time, the feeding needle 12 drives the material belt 200 to move to the right. Then, the feeding block 11 reaches the position of the first deflector 22, and the push rod 13 enters the first groove 222. Next, the feeding block 11 continues to move to the right, causing the push rod 13 to slide in the first groove 222, pressing down the first deflector 22 to avoid interference with the lifting block 21, until the push rod 13 leaves the first groove 222. The first deflector 22 then resets upward under the action of the second elastic reset member 24. Finally, the feeding block 11 reaches the feeding end position.

[0081] Reset process: First, the upper insert 34 moves upward, and the slider 33 resets to the right under the action of the third elastic reset member 37, so as to drive the feeding block 11 to start moving to the left; then, the feeding block 11 continues to move to the left to the first deflector 22, and the lifting block 21 is pushed backward by the first inclined surface 221 of the first deflector 22 until the feeding needle 12 reaches the second position, so as to drive the feeding needle 12 down to below the material belt 200. At the same time, the push rod 13 enters the second groove 223 and moves from the second inlet 2231 to the second outlet 2232. The second groove 223 pushes the push rod 13 backward until the push rod 13 leaves the second groove 223. Under the action of the first elastic reset member 14, the push rod 13 is reset forward to the first inlet 2221 and leaves the first inlet 2221. Then, the lifting block 21 continues to move to the left to the second deflector block 23. The lifting block 21 is pushed forward by the second inclined surface 231 of the second deflector block 23 until the feeding needle 12 reaches the rising position, so as to drive the feeding needle 12 to reconnect with the material belt 200 upward. Finally, the feeding block 11 reaches the feeding start position.

[0082] The entire process is achieved through mechanical structure. While completing the repeated feeding of the material strip 200, the material strip 200 is prevented from contacting the feeding needle 12 during the reset process of the feeding needle 12, so as to avoid the feeding needle 12 causing wear to the material strip 200, thereby improving product quality and enhancing the reliability of the in-mold feeding device 100.

[0083] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0084] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0085] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0086] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An in-mold pulling device, characterized by, include: The feeding assembly (10) includes a feeding block (11) and a feeding needle (12) movably mounted on the feeding block (11), the feeding needle (12) having a first position for inserting into the feed strip (200) and a second position spaced apart from the feed strip; Switching component (20), connected to the feed needle (12) and driving the feed needle (12) to switch between the first position and the second position; and The transmission assembly (30) is connected to the feeding block (11) and drives the feeding block (11) and the feeding needle (12) to reciprocate between the feeding start position and the feeding end position.

2. The in-mold pulling device of claim 1, wherein, The switching assembly (20) includes a lifting block (21) movably mounted on the feeding block (11), a lifting track (211) is formed on the lifting block (21), and a moving part (121) is formed on the feeding needle (12) and is movably connected to the lifting track (211). The lifting block (21) drives the moving part (121) to move along the lifting track (211) and realize the switching of the feeding needle (12) between the first position and the second position. The lifting track (211) includes a high position (2111) and a low position (2112). When the moving part (121) moves to the high position (2111), the feeding needle (12) is located at the first position. When the moving part (121) moves to the low position (2112), the feeding needle (12) is located at the second position.

3. The in-mold pulling device of claim 2, wherein, The switching component (20) further includes a first lever (22) and a second lever (23). The first lever (22) is relatively close to the feeding termination position along the moving direction of the feeding block (11), and the second lever (23) is relatively close to the feeding start position along the moving direction of the feeding block (11). The first lever (22) is located on the side relatively close to the lower part (2112) and can push the lifting block (21) away from the first lever (22). The second lever (23) is located on the side relatively close to the higher part (2111) and can push the lifting block (21) away from the second lever (23).

4. The in-mold pull device of claim 3, wherein, At least one of the first lever (22) and the lifting moving block (21) has a first inclined surface (221) formed thereon, and the first lever (22) and the lifting moving block (21) are connected by the first inclined surface (221). At least one of the second lever (23) and the lifting moving block (21) has a second inclined surface (231) formed thereon, and the second lever (23) and the lifting moving block (21) are connected by the second inclined surface (231).

5. The in-mold pull device of claim 4, wherein, The first lever (22) is capable of being raised and lowered and has a first groove (222) formed on the side near the feeding block (11). The first groove (222) includes a first inlet (2221) and a first outlet (2222) with a height difference. The first inlet (2221) is located on the side near the feeding start position, and the first outlet (2222) is located on the side near the feeding end position. The first inlet (2221) is lower than the first outlet (2222). The feeding assembly (10) also includes a push rod (13) movably mounted on the feeding block (11). The push rod (13) is at the same height as the first inlet (2221).

6. The in-mold pulling device of claim 5, wherein, The first push block (22) near the feeding block (11) also has a second groove (223) at the same height as the first inlet (2221). The second groove (223) includes a second inlet (2231) and a second outlet (2232). The depth of the second groove (223) gradually decreases from the second inlet (2231) to the second outlet (2232). The second outlet (2232) is not connected to the first inlet (2221). The top rod (13) is telescopically engaged with the feeding block and can contact the bottom wall of the second groove (223).

7. The in-mold pull device of claim 6, wherein, A first elastic reset member (14) is provided between the top rod (13) and the feeding block (11). And / or, the bottom of the first toggle block (22) is connected to a second elastic reset member (24).

8. The in-mold pull device of claim 1, wherein, The transmission assembly (30) includes: A gearbox, comprising a large gear and a small gear connected coaxially; A pusher rack (31), one end of which meshes with the large gear, and the other end of which is connected to the feeding block (11); and The transmission rack (32) meshes with the pinion.

9. The in-mold pull device of claim 8, wherein, The transmission assembly also includes: The slider (33) is connected to the end of the transmission rack (32) away from the pinion; and The upper insert (34) is connected to the upper mold drive, and a third inclined surface is formed on at least one of the upper insert (34) and the slider (33), and the upper insert (34) and the slider (33) are connected by the third inclined surface as a contactable mating structure.

10. The in-mold pull device of claim 9, wherein, The transmission assembly (30) further includes a stroke adjustment rod (35) and a starting position adjustment rod (36), wherein the stroke adjustment rod (35) is movably connected to the end of the upper insert (34) away from the slider (33), and the starting position adjustment rod (36) is movably connected to the slider (33).

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