Self-adaptive adjustment gate filling plug

Abstract

The invention provides a self-adaptive adjustment gate filling plug which comprises a conical plug body, the plug body is hollow, a sprue pipe vertically penetrates through the center of the plug body, a base is embedded in the center of the large-diameter end of the plug body, the plug body is in axial limiting connection with the sprue pipe through the base, a sliding base is embedded in the center of the small-diameter end of the plug body, and the sliding base is in axial sliding connection with the sprue pipe. The sliding base is in threaded transmission connection with the driving shaft outside the plug body through the transmission rotating shaft rotationally arranged on the outer side of the sprue pipe to slide up and down in the axial direction of the sprue pipe, the annularly-distributed V-shaped supporting rods are hinged between the sliding base and the base and abut against the inner wall of the small-diameter end of the plug body, variable-diameter self-adaption of the front end of the filling plug can be achieved, and good development prospects are achieved.

Description

Technical Field

[0001] The invention relates to the field of injection molding, in particular to a self-adjustable glue port filling plug. Background Art

[0002] Injection molding is a common processing method for plastic products. Injection molds include two or more molds that cooperate with each other. Multiple molds can be combined to enclose an injection cavity. The molten plastic glue is injected into the injection cavity by an injection molding machine. After the glue cools, it is demolded to obtain a plastic product with the same shape as the injection cavity.

[0003] The mold is generally provided with a glue port connected to the injection cavity, through which the glue liquid can be injected into the injection cavity. This means that after the injection molding is completed, the glue liquid in the glue port forms an excess part on the product. Therefore, a matching filling plug is often used to fill the glue port part. In the processing of molds with different glue port sizes, a conical filling plug is usually used to adapt the glue port by changing its diameter. However, this results in the contact surface between the filling plug and the glue port being only a circle of the outer edge of the glue port, with limited bonding force, and will cause more serious wear on the contact point. As the number of injection molding increases, the filling plug is also prone to wear, resulting in insufficient sealing.

[0004] Therefore, a new type of self-adaptive glue port filling plug is needed to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a self-adjustable glue port filling plug.

[0006] To achieve the above object, the present invention provides the following technical solutions: A self-adjustable glue inlet filling plug comprises a conical plug body, which is hollow and has a gate tube vertically penetrated in the center. A base is embedded in the center of one end of the large diameter of the plug body, which is connected to the gate tube axially through the base. A sliding base is embedded in the center of one end of the small diameter of the plug body, and the sliding base is connected to the gate tube axially for sliding. The sliding base slides up and down along the axial direction of the gate tube by rotating a transmission shaft arranged on the outside of the gate tube and a threaded transmission connection with a drive shaft outside the plug body. A V-shaped support rod distributed in an annular manner is hinged between the sliding base and the base, which abuts against the inner wall of the small diameter end of the plug body.

[0007] As a further solution of the present invention: the plug body includes a fitting portion and an expansion portion, the expansion portion is a hollow conical cone structure, a base and a sliding base are respectively embedded in the center of the upper and lower ends, the support rod is arranged in the expansion portion, and the edge of the large diameter end of the expansion portion is connected to the circular fitting portion extending radially.

[0008] As a further solution of the present invention: the edge of the small diameter end of the expansion part is a deformation part, the deformation part has an arc structure, and the thickness is smaller than the rest of the expansion part.

[0009] As a further solution of the present invention: the support rod is composed of a long rod and a short rod, one end of the long rod and the short rod are respectively hinged on the base and the sliding base, and the other ends are hinged to each other, and the hinged part of the long rod and the short rod abuts against the connecting position of the deformation part and the side wall of the expansion part.

[0010] As a further solution of the present invention: the long rod and the short rod are hinged via a triangular support seat, and the support seat and the expansion portion are in surface contact.

[0011] As a further solution of the present invention: rollers are rotatably provided at the upper and lower ends of the side of the support seat that contacts the expansion portion.

[0012] As a further solution of the present invention: an annular pulley is sleeved on the outer sides of the two rollers on the support seat, and contacts with the expansion part through the pulley.

[0013] As a further solution of the present invention: the bottom surface of the fitting portion is provided with a concave air groove, and the edge of the air groove is provided with a connector connecting the air groove and the upper space of the fitting portion.

[0014] As a further solution of the present invention: the air groove is a groove structure with a trapezoidal cross section, and the depth of the groove structure on the side close to the center is smaller than that on the side close to the outer edge.

[0015] As a further solution of the present invention: an outer edge of the air groove has an air ring whose depth is deeper than the air groove to form a secondary groove structure, and the connector is arranged within the range of the air ring. Beneficial Effects

[0016] 1. The plug body of the present invention is hollow, and a base is embedded in the center of one end with a large diameter, and a sliding base is embedded in the center of one end with a small diameter. A V-shaped support rod distributed in a ring is hinged between the sliding base and the base, which abuts against the inner wall of the small diameter end of the plug body. The lateral expansion of the support rod structure in the plug body driven by the transmission shaft and the driving shaft drives the outer diameter of the bottom of the hollow plug body to expand, thereby realizing self-adaptation to different sizes of glue ports. At the same time, the contact surface between the plug body and the inner wall of the glue port is also expanded, thereby reducing the wear of the unit contact surface and improving the sealing effect.

[0017] 2. The long rod and the short rod of the present invention are hinged through a triangular support seat, and rollers are rotatably provided at the upper and lower ends of the support seat that contacts the expansion part. An annular pulley is sleeved on the outer side of the roller. The contact with the expansion part through the pulley improves the filling effect of the filling plug on the glue port through a larger rolling contact area, thereby improving the sealing and joint tightness and reducing the resistance during up and down movement.

[0018] 3. The bottom surface of the fitting part of the present invention is provided with a recessed air groove, and the edge of the air groove is provided with a connector connecting the air groove and the upper space of the fitting part. By utilizing the arrangement of the air groove and the connector on the bottom surface of the fitting part, after the connector is connected to an external negative pressure device, the gas in the air groove can be extracted, so that the fitting part can fit the outer wall of the mold more closely, thereby improving the stability of the filling plug; and when the expansion part is completely smaller than the glue port, the support rod can be used to seal the inside of the glue port at the glue port position to form an air cavity, and then negative pressure can be pumped into the air cavity to make the expansion part of the plug body expand as a whole to fit the inner wall of the glue port, thereby improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic cross-sectional view of the structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the structural explosion of the present invention.

[0022] Figure 4 It is a schematic diagram of the plug body structure of the present invention.

[0023] Figure 5 It is a schematic diagram of the connection between the gate tube and the sliding base of the present invention.

[0024] Figure 6 It is a schematic diagram of the transmission shaft structure of the present invention.

[0025] Figure 7 It is a schematic diagram of the support rod structure of the present invention.

[0026] Figure 8 It is an exploded schematic diagram of the support rod structure of the present invention.

[0027] Figure 1-8 In: 1. gate tube; 2. plug body; 21. fitting part; 22. expansion part; 23. deformation part; 24. air groove; 25. air ring; 3. base; 4. sliding base; 5. transmission shaft; 6. driving shaft; 7. support rod; 71. long rod; 72. short rod; 73. support seat; 74. roller; 75. pulley; 8. connector. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings in the present invention Figure 1-Figure 8 , clearly and completely describe the specific technical solutions of the present invention; See also Figure 1-Figure 8 , Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 It is a schematic cross-sectional view of the structure of the present invention; Figure 3 It is a schematic diagram of the structure explosion of the present invention; Figure 4It is a schematic diagram of the plug body structure of the present invention; Figure 5 It is a schematic diagram of the connection between the gate tube and the sliding base of the present invention; Figure 6 It is a schematic diagram of the transmission shaft structure of the present invention; Figure 7 It is a schematic diagram of the support rod structure of the present invention; Figure 8 It is an exploded schematic diagram of the support rod structure of the present invention.

[0029] The present embodiment provides a self-adjustable glue inlet filling plug, comprising a conical plug body 2, the plug body 2 is hollow, a gate tube 1 is vertically penetrated in the center, a base 3 is embedded in the center of one end of the large diameter of the plug body 2, and the base 3 is connected to the gate tube 1 axially by limiting, and a sliding base 4 is embedded in the center of one end of the small diameter of the plug body 2, and the sliding base 4 is axially slidably connected to the gate tube 1, and the sliding base 4 is connected to the gate tube 1 axially by rotating a transmission shaft 5 arranged on the outside of the gate tube 1 and a driving shaft 6 outside the plug body 2 to slide up and down along the axial direction of the gate tube 1, and a V-shaped support rod 7 is hingedly distributed in an annular manner between the sliding base 4 and the base 3, which abuts against the inner wall of the small diameter end of the plug body 2; The lateral expansion of the support rod 7 structure inside the plug body 2 driven by the transmission shaft 5 and the drive shaft 6 drives the outer diameter of the bottom of the hollow plug body 2 to expand, thereby achieving self-adaptation to the different sizes of glue ports. At the same time, the contact surface between the plug body 2 and the inner wall of the glue port is also expanded, reducing the wear of the unit contact surface and improving the sealing effect.

[0030] The plug body 2 includes a fitting portion and an expansion portion 22. The expansion portion 22 is a hollow conical truncated cone structure. A base 3 and a sliding base 4 are respectively embedded in the center of the upper and lower ends. The support rod 7 is arranged in the expansion portion 22. The edge of the large diameter end of the expansion portion 22 is in contact with the circular fitting portion extending radially. By separately disposing the fitting portion 22 of the plug body 2, a double-layer sealing of the inner wall of the glue port and the outer wall of the mold outside the glue port is achieved, thereby improving the filling effect.

[0031] Specifically, the edge of the small diameter end of the expansion portion 22 is the deformation portion 23, and the deformation portion 23 is an arc-shaped structure with a thickness smaller than the remaining portion of the expansion portion 22, so as to provide a structural basis for lateral expansion and reduce the difficulty.

[0032] Furthermore, the support rod 7 is composed of a long rod 71 and a short rod 72, one end of the long rod 71 and the short rod 72 are hinged on the base 3 and the sliding base 4 respectively, and the other ends are hinged to each other, and the hinged part of the long rod 71 and the short rod 72 rests on the connection position of the deformation part 23 and the side wall of the expansion part 22, so that the sliding base 4 pushes the short rod 72 to realize the swinging outward movement of the long rod 71 structure, and then realizes the radial expansion of the plug body 2 structure.

[0033] Furthermore, the long rod 71 and the short rod 72 are hinged via a triangular support seat 73, and the support seat 73 is in surface contact with the expansion portion 22, thereby improving the filling effect of the filling plug on the glue port through a larger contact area, thereby improving the sealing and joint tightness.

[0034] Furthermore, rollers 74 are rotatably provided at the upper and lower ends of the support seat 73 that contacts the expansion portion 22, so as to change the sliding friction into rolling friction and reduce the resistance during the up and down movement.

[0035] Furthermore, an annular pulley 75 is sleeved on the outer side of the two rollers 74 on the support seat 73, and contacts the expansion portion 22 through the pulley 75; To achieve rolling friction and surface contact at the same time.

[0036] Specifically, the bottom surface of the fitting portion has a concave air groove 24, and the edge of the air groove 24 has a connector 8 connecting the air groove 24 and the upper space of the fitting portion; By utilizing the settings of the air groove 24 on the bottom surface of the fitting part and the connecting head 8, after the connecting head 8 is connected to the external negative pressure equipment, the gas in the air groove 24 can be extracted to make the fitting part fit the outer wall of the mold more closely, thereby improving the stability of the filling plug; when the expansion part 22 is completely smaller than the glue port, the support rod 7 can be used to seal the glue port at the glue port position to form an air cavity, and then negative pressure can be pumped into the air cavity to make the expansion part 22 of the plug body 2 expand as a whole to fit the inner wall of the glue port, thereby improving the sealing effect.

[0037] Furthermore, the air groove 24 is a groove structure with a trapezoidal cross-section, and the depth of the groove structure on the side close to the center is smaller than that on the side close to the outer edge. By setting the difference in depth between the inner and outer sides of the air groove 24, the outer edge position close to the connecting head 8 will fit the outer wall of the mold later than the center side under the action of negative pressure, thereby avoiding the connection position between the air groove 24 and the connecting head 8 first fitting the outer wall of the mold under the action of negative pressure and then blocking the connecting head 8, resulting in a loose fit.

[0038] Furthermore, the outer edge of the gas groove 24 has a gas ring 25 whose depth is deeper than the gas groove 24, forming a secondary groove structure, and the connector 8 is arranged within the gas ring 25; The air ring 25 of the second depth is used to achieve air communication between the connector 8 and the air groove 24, so as to avoid the connection position between the air groove 24 and the connector 8 first fitting against the outer wall of the mold under the action of negative pressure and then blocking the connector 8, resulting in loose fitting.

[0039] When implementing the technical solution recorded in this embodiment, the expansion portion 22 of the plug body 2 is aligned with the glue port of the mold and inserted until it cannot be inserted or the fitting portion fits with the outer wall of the mold. The drive shaft 6 is driven to rotate by the drive assembly, and the drive shaft 6 drives the sliding base 4 to move upward through the transmission shaft 5, so that the support rod 7 inside the plug body 2 expands laterally to drive the bottom of the hollow plug body 2 to expand the outer diameter, thereby realizing self-adaptation to glue ports of different sizes. At the same time, the contact surface between the plug body 2 and the inner wall of the glue port is also expanded, reducing the wear of the unit contact surface and improving the sealing effect. Then, the negative pressure device is connected to the connector 8 to extract the gas in the air groove 24, so that the fitting portion fits the outer wall of the mold more closely, thereby improving the stability of the filling plug. When the expansion portion 22 is completely smaller than the glue port, the support rod 7 is used to seal the glue port to form an air cavity at the glue port position, and then negative pressure is pumped into the air cavity to make the expansion portion 22 of the plug body 2 expand as a whole to fit the inner wall of the glue port, thereby improving the sealing effect.

Claims

1. An adaptively adjustable glue port filling plug, characterized in that: include: A plug body (2), the plug body (2) is a hollow conical structure, with a gate pipe (1) vertically penetrating the center; A support rod (7) is provided with a base (3) embedded in the center of one end of the large diameter of the plug body (2), and is axially limitedly connected to the gate tube (1) through the base (3); a sliding base (4) is embedded in the center of one end of the small diameter of the plug body (2), and the sliding base (4) is axially slidably connected to the gate tube (1). The sliding base (4) slides up and down along the axial direction of the gate tube (1) by rotating a transmission shaft (5) arranged outside the gate tube (1) and a drive shaft (6) outside the plug body (2) through a threaded transmission connection. A V-shaped support rod (7) is hingedly distributed in an annular manner between the sliding base (4) and the base (3), and abuts against the inner wall of the small diameter end of the plug body (2).

2. The self-adaptive glue port filling plug according to claim 1, characterized in that: The plug body (2) comprises a fitting portion and an expansion portion (22); the expansion portion (22) is a hollow conical frustum structure, with a base (3) and a sliding base (4) respectively embedded in the center of the upper and lower ends; the support rod (7) is arranged in the expansion portion (22); the edge of the large diameter end of the expansion portion (22) is in contact with a circular fitting portion extending radially.

3. The self-adaptive glue port filling plug according to claim 2, characterized in that: The edge of the small diameter end of the expansion portion (22) is a deformation portion (23), and the deformation portion (23) is an arc-shaped structure, and its thickness is smaller than the rest of the expansion portion (22).

4. The self-adaptive glue port filling plug according to claim 3, characterized in that: The support rod (7) is composed of a long rod (71) and a short rod (72). One end of the long rod (71) and the short rod (72) are respectively hinged on the base (3) and the sliding base (4), and the other ends are hinged to each other. The hinged portion of the long rod (71) and the short rod (72) abuts against the connection position of the side wall of the deformation portion (23) and the expansion portion (22).

5. The self-adaptive glue port filling plug according to claim 4, characterized in that: The long rod (71) and the short rod (72) are hingedly connected via a triangular support seat (73), and the support seat (73) and the expansion portion (22) are in surface contact.

6. The self-adaptive glue port filling plug according to claim 5, characterized in that: Rollers (74) are rotatably provided at the upper and lower ends of the side of the support seat (73) that contacts the expansion portion (22).

7. The self-adaptive glue port filling plug according to claim 6, characterized in that: An annular belt pulley (75) is sleeved on the outer sides of the two rollers (74) on the support seat (73), and contacts the expansion portion (22) via the belt pulley (75).

8. The self-adaptive glue port filling plug according to claim 2, characterized in that: The bottom surface of the fitting portion is provided with a concave air groove (24), and the edge of the air groove (24) is provided with a connector (8) connecting the air groove and the space on the upper side of the fitting portion.

9. The self-adaptive glue port filling plug according to claim 8, characterized in that: The air groove (24) is a groove structure with a trapezoidal cross section, and the groove structure depth on the side close to the center is smaller than that on the side close to the outer edge.

10. The self-adaptive glue port filling plug according to claim 8, characterized in that: The outer edge of the air groove (24) is provided with an air ring (25) whose depth is deeper than the air groove (24), forming a secondary groove structure, and the connector (8) is arranged within the range of the air ring (25).

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