In-mold implant nut injection molding fixing structure

Abstract

The utility model relates to the field of injection molding, the utility model discloses a kind of in-mold implantation nut injection molding fixed structure, including line position mechanism, line position mechanism includes: line position seat, insert needle stop block, insert needle, spring stop block, linear spring and nut clamping insert, insert needle stop block is along the height direction of line position seat and is penetrated second sliding slot, spring stop block and insert needle are slidably arranged in line position seat interior, spring stop block is fixed to insert needle, insert needle is provided with central hole, insert needle one end is provided with several through slots, linear spring is clamped between spring stop block and insert needle stop block, nut clamping insert includes positioning column and several clamping claws, positioning column is sleeved in the interior of central hole, and clamping claw is correspondingly penetrated through slot.Mechanical hand loading before and injection molding when processing, insert needle is driven by linear spring and pops out parting surface a preset distance, when loading, insert needle and copper nut at its end will be synchronously contracted a distance, avoid appearing tiny deviation or eccentricity, guarantee the positioning accuracy of insert needle and copper nut meet standard.

Description

Technical Field

[0001] This utility model relates to the field of injection molding, and in particular to an in-mold implanted nut injection molding fixing structure. Background Technology

[0002] In the injection molding industry, some injection molded products require a certain number of copper nuts to be inserted into the mold before injection molding. Currently, robotic arms are used to insert these copper nuts. However, due to the relatively low positional accuracy of some robotic arms and the limited size of the support mechanism, existing sliding mechanisms lack buffering for the copper nuts. During material loading, the robotic arm often causes a slight offset or eccentricity of the nut towards the sliding mechanism, resulting in a hard collision between the nut and the parting surface on the sliding mechanism. This causes one end of the copper nut to protrude through the outer wall of the injection molded product, while the other end is blocked by the injection material. Therefore, higher positional accuracy is required for the robotic arm, and using a high-precision robotic arm would increase costs. Utility Model Content

[0003] The purpose of this utility model is to provide an in-mold nut injection fixing structure to ensure that the nut is buffered during material feeding, prevent hard collision between the nut and the parting surface, and solve the problem of the nut easily falling off during installation and mold closing.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: an in-mold implantable nut injection molding fixing structure, including a sliding mechanism, wherein the sliding mechanism includes:

[0005] A sliding seat, one end of which is provided with a parting surface for forming the outer wall of the product, and the sliding seat is provided with a first slide groove and a second slide groove inside, with the two ends of the first slide groove respectively connected to the parting surface and the second slide groove;

[0006] A pin-insertion stop block, wherein the pin-insertion stop block passes through the second slide groove along the height direction of the row seat;

[0007] The insert pin is slidably disposed in the first sliding groove. The insert pin has a central hole. The end of the insert pin away from the insert pin stop block has several through grooves around the central hole, and all the through grooves are connected to the central hole.

[0008] A spring stop block is slidably disposed inside the second slide groove and fixed to the insert pin;

[0009] A linear spring, wherein the linear spring is sleeved on the insert pin and clamped between the spring stop block and the insert pin stop block;

[0010] A locking nut insert includes a positioning post and several grippers. The positioning post is sleeved inside the central hole, and the grippers are correspondingly arranged in the through grooves. The ends of the grippers near the pin stop are fixed to the ends of the positioning post near the pin stop, and the ends of the grippers away from the pin stop slide in engagement with the through grooves.

[0011] Preferably, the slide seat has an exhaust channel inside, the exhaust channel is located on one side of the second slide groove, the two ends of the second slide groove and the parting surface are provided with first air holes, the end of the slide seat away from the parting surface is provided with an exhaust hole, and the first air holes and the exhaust hole are connected to the exhaust channel.

[0012] Preferably, the positioning post has a connecting block at one end near the pin stop, the connecting block is disposed in the center hole with clearance fit, and the jaws are all fixed to the connecting block at one end near the pin stop.

[0013] Preferably, the cross-sections of the positioning post and the central hole are both cross-shaped or regular polygonal.

[0014] Preferably, the connecting block is a regular prism, the number of sides of the bottom surface of the connecting block is a, the total number of grippers is b, and a and b satisfy the following relationship: a=2*b.

[0015] Preferably, the in-mold implanted nut injection fixing structure further includes at least one positioning pin, the connecting block and the insert pin are detachably connected by the positioning pin, the connecting block has a first through hole in the middle, the insert pin has a plurality of second through holes evenly spaced, and the positioning pin passes through the first through hole and the second through hole.

[0016] Preferably, the slide seat has a cooling water channel inside, the cooling water channel is in the shape of a gate, and the end of the slide seat away from the parting surface has two water inlet and outlet holes, the two water inlet and outlet holes are respectively connected to the two ends of the cooling water channel, and the first slide groove and the second slide groove are both arranged above the cooling water channel.

[0017] Preferably, the gripper is an elastically deformable plate, and the gripper has a protrusion on the surface away from the positioning post. One end of the protrusion extends to the outside of the insert pin, and the protrusion is in clearance fit with the through groove.

[0018] Preferably, the connection between the spring stop and the insert pin is any one of interference fit connection, threaded connection and integral molding connection.

[0019] Preferably, the side of the row seat is provided with a second air hole and a water inlet hole spaced apart, the second air hole is connected to the exhaust channel, and the water inlet hole is connected to the cooling water channel.

[0020] The beneficial effects of this invention are as follows: Before the robotic arm loads the material and during injection molding, the insert pin is ejected from the parting surface a preset distance under the drive of a linear spring. When the robotic arm loads the copper nut onto the insert pin, the insert pin and the copper nut at its end are pushed by the robotic arm and synchronously retract a distance towards the inside of the mounting seat, providing a buffer function and ensuring that the positioning accuracy of the insert pin and the copper nut meets the standard. After the robotic arm resets, the insert pin is ejected from the parting surface a distance under the drive of the linear spring, moving the copper nut at the end of the insert pin to the preset position.

[0021] When the robotic arm places the copper nut onto the outside of the insert pin, one end of the gripper is fixed to the positioning pin inside the central hole, while the other end extends to the outside of the through groove. The portion of the gripper located outside the through groove presses against the inner wall of the copper nut, securing it to the end of the insert pin. This design facilitates nut installation by either manual labor or the robotic arm. By adding a nut-locking insert to the insert pin, the nut is secured, preventing it from falling off during mold closing and facilitating mold closing for injection molding.

[0022] When the mold is closed, the insert pin is ejected a certain distance from the parting surface under the drive of the linear spring, ensuring that the copper nut is in the preset position and is successfully inserted into the injection molded product. Attached Figure Description

[0023] The accompanying drawings further illustrate the present invention, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0024] Figure 1 A schematic diagram of the in-mold implanted nut injection fixing structure provided in an embodiment of this utility model. Figure 1 ;

[0025] Figure 2 This is a half-sectional view of an in-mold implanted nut injection fixing structure provided in an embodiment of the present invention;

[0026] Figure 3 for Figure 1 A magnified view of a portion of region A in the middle;

[0027] Figure 4 for Figure 2 A magnified view of a portion of region B in the middle;

[0028] Figure 5 This is a schematic diagram of the structure of a retaining nut insert provided in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the cooling water circuit provided in one embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of an exhaust channel provided in an embodiment of the present invention;

[0031] The markings in the diagram are: 1: Positioning seat; 2: Pin stop block; 3: Pin; 4: Spring stop block; 5: Linear spring; 6: Clip nut insert; 7: Positioning pin; 8: Several grippers; 9: Connecting block; 10: Protrusion; 11: Center hole; 12: Through groove; 13: Positioning pin; 14: Exhaust channel; 15: Cooling water channel; 16: First air hole; 17: Second air hole; 18: First slide groove; 19: Second slide groove. Detailed Implementation

[0032] The specific embodiments of this utility model 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 the scope of this utility model.

[0033] It should be noted that, in this utility model, unless otherwise stated, when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or a central element may coexist. The directional terms used, such as "above," generally refer to the side of the sliding mechanism away from the mold core. The directional terms used, such as "below," generally refer to the side of the sliding mechanism closer to the mold core. "Inner" and "outer" refer to the inner and outer aspects of a specific contour. "Far" and "near" refer to the distance from or near to a certain component.

[0034] like Figures 1 to 7 As shown in the figure, an embodiment of the present invention provides an in-mold implantable nut injection fixing structure, including a sliding mechanism, the sliding mechanism comprising:

[0035] The slide seat 1 has a parting surface at one end for forming the outer wall of the product. The slide seat 1 has a first slide groove 18 and a second slide groove 19 inside. The two ends of the first slide groove 18 are respectively connected to the parting surface and the second slide groove 19.

[0036] The pin-insertion block 2 passes through the second slide groove 19 along the height direction of the slide seat 1. The height direction of the slide seat 1 is perpendicular to the center line of the second slide groove 19. The center line of the first slide groove 18 is collinear with the center line of the second slide groove 19. The slide seat 1 is provided with a slanted guide post. The slanted guide post is located on the side of the pin-insertion block 2 away from the parting surface. The center line of the slanted guide post intersects the center line of the second slide groove 19 at an incline.

[0037] The insert 3 is slidably disposed in the first sliding groove 18. The insert 3 has a central hole 11. The end of the insert 3 away from the insert stop block 2 has a plurality of through grooves 12 around the central hole 11. All the through grooves 12 are connected to the central hole 11.

[0038] Spring stop 4, which is slidably disposed inside the second slide groove 19 and fixed to the insert pin 3;

[0039] A linear spring 5 is sleeved on the insert pin 3 and sandwiched between the spring stop block 4 and the insert pin stop block 2;

[0040] The nut insert 6 includes a positioning post 7 and several claws 8. The positioning post 7 is sleeved inside the central hole 11. The claws 8 are correspondingly arranged in the through groove 12. The end of each claw 8 near the pin stop 2 is fixed to the end of the positioning post 7 near the pin stop 2. The end of each claw 8 away from the pin stop 2 is slidably engaged with the through groove 12.

[0041] To improve the positioning accuracy of the nut and the insert pin 3, the diameter of the insert pin 3 decreases in a stepped manner away from the insert pin stop 2, and the minimum diameter of the insert pin 3 is equal to the inner diameter of the nut. This results in multiple steps on the insert pin 3. When the robot arm places the nut onto the end of the insert pin 3, the nut is blocked by the steps on the insert pin 3, thus achieving precise positioning.

[0042] The sliding seat 1 is equipped with an exhaust channel 14 located on one side of the second slide groove 19. The second slide groove 19 has first air holes 16 at both ends and on the parting surface. An exhaust hole is located at the end of the sliding seat 1 furthest from the parting surface. Both the first air holes 16 and the exhaust hole are connected to the exhaust channel 14. When the robotic arm is feeding material, as it places the nut onto the insert pin 3, it pushes the insert pin 3 to retract a certain distance into the sliding seat 1. The insert pin 3 then causes the spring stop block 4 to slide a certain distance inside the second slide groove 19. As the spring stop block 4 slides inside the second slide groove 19, the gas at both ends of the second slide groove 19 connects to the exhaust channel 14 through the two first air holes 16, ensuring consistent air pressure on both sides of the spring stop block 4 and ensuring smooth sliding of the spring stop block 4.

[0043] The positioning post 7 has a connecting block 9 at one end near the pin stop 2. The connecting block 9 is fitted into the center hole 11 with a clearance fit. The grippers 8 are all fixed to the connecting block 9 at one end near the pin stop 2. The positioning post 7 and the center hole 11 cooperate to position the connecting block 9, and the grippers 8 are connected to the positioning post 7 through the connecting block 9.

[0044] The positioning post 7 and the center hole 11 both have cross-shaped or regular polygonal cross-sections. The positioning post 7 and the center hole 11 cooperate to position the connecting block 9 and the gripper 8.

[0045] The connecting block 9 is a regular prism. The number of sides of the base of the connecting block 9 is 'a', and the total number of grippers 8 is 'b'. 'a' and 'b' satisfy the following relationship: a = 2 * b. The grippers 8 are evenly spaced around the positioning post 7. The total number of grippers 8 is at least two, and the nut is fixed by the cooperation of multiple grippers 8.

[0046] The in-mold implanted nut injection fixing structure also includes at least one positioning pin 13. The connecting block 9 and the insert pin 3 are detachably connected by the positioning pin 13. The connecting block 9 has a first through hole in the middle, and the insert pin 3 has several second through holes evenly spaced apart. The positioning pin 13 passes through the first through hole and the second through hole. The positioning pin 13 passes through the insert pin 3 and the connecting block 9, fixing the connecting block 9 inside the central hole 11, fixing the retaining nut insert 6 to one end of the insert pin 3, and enabling the retaining nut insert 6 to be detached and replaced.

[0047] The slide seat 1 is internally equipped with a cooling water channel 15, which is U-shaped. Two inlet and outlet water holes are opened at the end of the slide seat 1 furthest from the parting surface, respectively connecting to both ends of the cooling water channel 15. The first slide groove 18 and the second slide groove 19 are both located above the cooling water channel 15. The cooling water channel 15 controls the temperature of the slide seat 1, ensuring a stable temperature for the slide seat 1 and the insert pins 3 inside, preventing the slide seat 1 from becoming too cold during the robotic arm's loading process.

[0048] The gripper 8 is an elastically deformable plate. A protrusion 10 is provided on the surface of the gripper facing away from the positioning post 7. One end of the protrusion 10 extends to the outside of the insert pin 3, and the protrusion 10 is clearance-fitted with the through groove 12. When the robot arm places the copper nut onto one end of the insert pin 3, the copper nut presses the protrusion 10 into the through groove 12. After the copper nut passes through the protrusion 10, the protrusion 10 springs back and returns to its original position outside the through groove 12, thus securing the nut to the end of the insert pin 3.

[0049] In one embodiment, the spring stop 4 and the insert pin 3 are integrally formed and connected. The distance by which the insert pin 3 pops out of the parting surface is controlled by the spring stop 4. When the spring stop 4 and the insert pin 3 are integrally formed and connected, the positions of the spring stop 4 and the insert pin 3 are fixed, ensuring that the insert pin 3 and the copper nut at its end are always popped out and stable in the fixed position.

[0050] In one embodiment, the spring stop 4 and the insert pin 3 are either interference-fitted or threaded. When the spring stop 4 and the insert pin 3 are interference-fitted or threaded, the relative position of the spring stop 4 and the insert pin 3 can be freely adjusted. The relative position of the spring stop 4 and the insert pin 3 can be adjusted according to the insertion depth of the copper nut, thereby changing the distance of the insert pin 3 ejecting from the parting surface and thus adjusting the insertion depth of the copper nut.

[0051] In one embodiment, the slide seat 1 has a second vent 17 and a water inlet spaced apart on its side. The second vent 17 is connected to an exhaust channel 14, and the water inlet is connected to a cooling water channel 15. The second vent 17 allows gas from the slide side to be discharged to the outside of the mold through the exhaust channel 14, preventing the formation of air bubbles inside the injection-molded product. Adding a water inlet to the slide side ensures consistent water temperature throughout the cooling water channel 15, which is beneficial for controlling the temperature of the liquid within the cooling water channel 15.

[0052] The technical features of the embodiments described above can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these should all be considered to be within the scope of this specification.

Claims

1. An in-mold implanted nut injection molding fixing structure, characterized in that: Includes a row positioning mechanism, the row positioning mechanism comprising: A sliding seat, one end of which is provided with a parting surface for forming the outer wall of the product, and the sliding seat is provided with a first slide groove and a second slide groove inside, with the two ends of the first slide groove respectively connected to the parting surface and the second slide groove; A pin-insertion stop block, wherein the pin-insertion stop block passes through the second slide groove along the height direction of the row seat; The insert pin is slidably disposed in the first sliding groove. The insert pin has a central hole. The end of the insert pin away from the insert pin stop block has several through grooves around the central hole, and all the through grooves are connected to the central hole. A spring stop block is slidably disposed inside the second slide groove and fixed to the insert pin; A linear spring, wherein the linear spring is sleeved on the insert pin and clamped between the spring stop block and the insert pin stop block; A locking nut insert includes a positioning post and several grippers. The positioning post is sleeved inside the central hole, and the grippers are correspondingly arranged in the through grooves. The ends of the grippers near the pin stop are fixed to the ends of the positioning post near the pin stop, and the ends of the grippers away from the pin stop slide in engagement with the through grooves.

2. The in-mold implanted nut injection molding fixing structure according to claim 1, characterized in that: The slide seat is provided with an exhaust channel inside. The exhaust channel is located on one side of the second slide groove. The two ends of the second slide groove and the parting surface are provided with first air holes. The end of the slide seat away from the parting surface is provided with an exhaust hole. The first air holes and the exhaust holes are all connected to the exhaust channel.

3. The in-mold implanted nut injection molding fixing structure according to claim 1, characterized in that: The positioning post has a connecting block at one end near the pin stop, and the connecting block is fitted with a clearance fit inside the central hole. The jaws are all fixed to the connecting block at one end near the pin stop.

4. The in-mold implanted nut injection fixing structure according to claim 3, characterized in that: The cross-sections of the positioning post and the central hole are both cross-shaped or regular polygonal.

5. The in-mold implanted nut injection fixing structure according to claim 3, characterized in that: The connecting block is a regular prism. The number of sides of the bottom surface of the connecting block is a, and the total number of grippers is b. a and b satisfy the following relationship: a = 2 * b.

6. The in-mold implanted nut injection molding fixing structure according to claim 3, characterized in that: The in-mold implanted nut injection fixing structure also includes at least one positioning pin. The connecting block and the insert pin are detachably connected by the positioning pin. The connecting block has a first through hole in the middle, and the insert pin has several second through holes evenly spaced apart. The positioning pin passes through the first through hole and the second through hole.

7. The in-mold implanted nut injection fixing structure according to claim 2, characterized in that: The sliding seat is provided with a cooling water passage in the shape of a gate. Two water inlet and outlet holes are opened at the end of the sliding seat away from the parting surface. The two water inlet and outlet holes are respectively connected to the two ends of the cooling water passage. The first slide groove and the second slide groove are both located above the cooling water passage.

8. The in-mold implanted nut injection fixing structure according to claim 1, characterized in that: The gripper is an elastically deformable plate. The gripper has a protrusion on the surface away from the positioning post. One end of the protrusion extends to the outside of the insert pin. The protrusion is in clearance fit with the through groove.

9. The in-mold implanted nut injection fixing structure according to claim 1, characterized in that: The connection between the spring stop and the insert can be any one of the following: interference fit connection, threaded connection, or integral molding connection.

10. The in-mold implanted nut injection fixing structure according to claim 7, characterized in that: The side of the row seat is provided with a second air hole and a water inlet hole spaced apart. The second air hole is connected to the exhaust channel, and the water inlet hole is connected to the cooling water channel.

Images