Secondary injection molding mold

Abstract

The secondary injection molding mold comprises a mold assembly, a rotating assembly is arranged on the back face of the mold assembly, a driving assembly is arranged at the front end of the mold assembly, a base assembly is arranged at the bottom end of the mold assembly, the mold assembly comprises two section molds, and a mold cavity is formed in each section mold; locking grooves are formed in the upper end face and the lower end face of the section mold, joint holes are formed in the four corners of the section mold, guide holes are formed in the two sides of the section mold, the rotating assembly comprises a rotating disc, four first electric cylinders are fixedly installed on the front end face of the rotating disc, and locking plates are fixedly installed at the tail ends of driving shafts of the first electric cylinders; the locking plate and the four locking grooves are mutually aligned and can be in clearance fit, a center shaft is fixedly connected to the circle center of the rotating disc in a sleeving mode, the center shaft is fixedly connected with a rotating plate in a sleeving mode, the secondary injection molding mold is provided with a rapid and accurate angle rotating device, and the secondary injection molding mold can be used for cooling and preliminarily cleaning the mold.

Description

Technical Field

[0001] The invention relates to the technical field of secondary injection molds, and more specifically to a secondary injection molding mold. Background Art

[0002] The secondary injection mold generally has two cavities. In the first injection process, the mold is joined and plastic is injected, then the mold is rotated 180 degrees to align with the other cavity mold, and it is joined again under the action of the push rod, and then another plastic is injected to complete the secondary injection effect. However, in the actual injection molding process, the traditional secondary injection mold still has the following shortcomings;

[0003] First, after the two cavities of the traditional secondary injection mold are rotated, the guide shaft needs to be used to align the holes on the mold and smoothly insert it into the mold so that the molds fit each other. Therefore, the rotation angle must be very accurate. However, the traditional secondary injection mold does not have a very fast and accurate rotation device to exchange the two cavities. This easily causes errors in the alignment direction between the guide shaft and the holes on the mold, thereby affecting the mold closing process.

[0004] Secondly, in the traditional secondary injection mold, the plastic in the mold still has a certain temperature after molding, and the inside of the injection mold is also easily contaminated with some impurities in the molding process. The traditional secondary injection mold does not have a structure that can cool the molded plastic and quickly clean the impurities inside the injection mold.

[0005] Therefore, it is necessary to provide a secondary injection molding mold to solve the above problems. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a secondary injection molding mold to solve the problems existing in the above-mentioned background technology.

[0007] The present invention provides the following technical solution: a secondary injection molding mold, comprising a mold assembly, a rotating assembly is provided on the back of the mold assembly, a driving assembly is provided on the front end of the mold assembly, and a base assembly is provided at the bottom end of the mold assembly;

[0008] The mold assembly includes a mold, a mold cavity is provided inside the mold, the number of the molds is two, the upper and lower end surfaces of the molds are provided with locking grooves, the four corners of the molds are provided with engaging holes, and the two sides of the molds are provided with guide holes;

[0009] The rotating assembly includes a turntable, four first electric cylinders are fixedly installed on the front end surface of the turntable, and locking plates are fixedly installed on the end of the driving shaft of the first electric cylinder. The locking plates are aligned with the four locking grooves and can be clearance-matched. A central axis is fixedly sleeved at the center of the turntable, and a rotating plate is fixedly sleeved on the central axis. The rotating plate has two outer edge arc edges, and mutually symmetrical inner concave arc grooves are opened on both sides of the rotating plate. A wheel disc is attached to the outer edge arc edge of the rotating plate, and the curvature of the inner circle of the wheel disc is consistent with the curvature of the outer edge arc edge of the rotating plate.

[0010] Furthermore, an intermediate mold is provided at the front end of the mold, and a hole feature aligned with the locking groove, the engaging hole and the guide hole is opened on the intermediate mold; a partition is provided at the front end of the intermediate mold, and a hole feature aligned with the locking groove, the engaging hole and the guide hole is opened on the partition; a push plate is provided at the front end of the partition, and guide shafts are fixedly sleeved at the four corners of the push plate; the shaft body of the guide shaft passes through the partition and the intermediate mold and is movably sleeved therewith, and the shaft body of the guide shaft can be loosely fitted with the engaging hole; engaging columns are fixedly sleeved on both sides of the push plate, and the engaging columns pass through the partition and the intermediate mold and are movably sleeved therewith; the shaft body of the engaging column is movably sleeved with a return spring, and the end of the shaft body of the engaging column can be loosely fitted with the guide hole.

[0011] Furthermore, locking plates are fixedly installed on the upper and lower ends of the inner side of the push plate, and an embedded groove is opened at the end of the lock plate and can be loosely matched with the lock groove. An injection molding tube is movably sleeved at the center of the push plate, and the tube body of the injection molding tube passes through the partition and is movably sleeved therewith. The end of the tube body of the injection molding tube is fixedly sleeved with the intermediate mold and is connected to the model cavity.

[0012] Furthermore, a notch is provided on the convex edge of the outer ring of the wheel disc, and two convex shafts are provided on the notch of the wheel disc, and the convex shafts can cooperate with the concave arc groove provided on the rotating plate, and a driving shaft of a servo motor is fixedly connected to the center of the wheel disc, and a fixing ring is fixedly sleeved on the servo motor, and a fixing block is fixedly installed on the bottom end of the fixing ring.

[0013] Furthermore, the driving assembly includes a base plate, and a second electric cylinder is fixedly installed at the four corners of the outer side surface of the base plate, and a push rod is fixedly connected to the driving end of the second electric cylinder. The shaft of the push rod passes through the base plate and is fixedly connected to the four corners of the outer side surface of the push plate, and a bearing is fixedly installed at the center of the outer side surface of the base plate, and a rotating shaft is movably sleeved on the bearing, and the shaft end of the rotating shaft is fixedly connected to the center shaft, and the bottom surface of the base plate is provided with evenly distributed orifice plates, and a fan is provided at the bottom end of the orifice plates.

[0014] Furthermore, the base assembly includes a base, the upper end surface of the base is fixedly connected to the fixed block, the upper end surface of the base is provided with a movable groove, the movable groove and the bottom outer ring of the wheel disc cooperate with each other, the base is provided with a cavity groove, the upper end of the cavity groove provided by the base is fixedly installed with a sealing plate, the upper end of the sealing plate is fixedly connected with evenly distributed pipe columns, the pipe body of the pipe column is aligned with the upper fan and fixedly connected to the bottom end of the seat plate, the cavity groove provided by the base is fixedly installed with a filter layer, and grid plates are fixedly installed on both sides of the base.

[0015] Technical effects and advantages of the present invention:

[0016] 1. The present invention is provided with a mold assembly and a rotating assembly. When the secondary injection molding mold is used, when the push plate, the partition plate, the intermediate mold, and the mold are fitted together for mold closing, the end of the locking plate enters the locking groove. At this time, the first electric cylinder can drive the locking plate to enter the locking groove and lock with the embedded groove opened by the locking plate, so that the mold closing state is stable. After the first injection molding is completed, the servo motor can drive the wheel disc to rotate. When the convex shaft enters and leaves the concave arc groove opened by the rotating plate, it drives the rotating plate to rotate 180 degrees, so that the outer edge arc edge on the other side of the rotating plate fits with the inner circle of the wheel disc. This method is fast and convenient and has high angular rotation accuracy, so it can reduce the error of mold rotation in the traditional secondary injection molding process.

[0017] 2. The present invention is provided with a driving assembly and a base assembly. During the plastic molding process, when the push plate, the partition plate and the intermediate mold are separated from each other, the fan can drive the mold in the gap to perform air cooling, and some impurity particles inside the mold will also be absorbed with the airflow. When the impurity particles inside the mold are absorbed into the cavity inside the base through the pipe column with the airflow, the impurity particles are intercepted by the filter layer, and the hot air flow is discharged from the grid plate. Through this structure, the mold cooling and cleaning effects of the equipment are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the mold assembly of the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of the rotating assembly of the present invention.

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the driving component of the present invention.

[0022] Figure 5 It is a schematic diagram of the structure of the base assembly of the present invention.

[0023] The accompanying drawings are marked as follows: 1. mold assembly; 101. mold; 102. mold cavity; 103. locking groove; 104. engaging hole; 105. guide hole; 106. intermediate mold; 107. partition plate; 108. push plate; 109. guide shaft; 110. engaging column; 111. return spring; 112. locking plate; 113. injection tube; 2. rotating assembly; 201. turntable; 202. first electric cylinder; 203. locking plate; 204. center axis; 205 , rotating plate; 206, wheel disc; 207, cam; 208, servo motor; 209, fixing ring; 210, fixing block; 3, driving assembly; 301, seat plate; 302, second electric cylinder; 303, push rod; 304, bearing; 305, rotating shaft; 306, orifice plate; 307, fan; 4, base assembly; 401, base; 402, movable groove; 403, sealing plate; 404, pipe column; 405, filter layer; 406, grid plate. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The secondary injection molding mold involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0025] Reference Figure 1 The present invention provides a secondary injection molding mold, comprising a mold assembly 1, a rotating assembly 2 is provided on the back of the mold assembly 1, a driving assembly 3 is provided on the front end of the mold assembly 1, and a base assembly 4 is provided on the bottom end of the mold assembly 1;

[0026] In this embodiment, the mold assembly 1 is used to achieve the injection molding effect of the plastic, the rotating assembly 2 can drive the mold assembly 1 to rotate quickly and accurately one hundred and eighty degrees, thereby realizing the change of the cavity during the secondary injection molding process, the driving assembly 3 is used to push the mold assembly 1 to close the mold, and the base assembly 4 is used to collect the impurity particles absorbed from the mold assembly 1. The specific structure and working principle of the above components will be described in detail later.

[0027] Reference Figure 2The mold assembly 1 includes a mold 101, a model cavity 102 is provided inside the mold 101, there are two molds 101, the upper and lower end surfaces of the mold 101 are provided with locking grooves 103, the four corners of the mold 101 are provided with engaging holes 104, the two sides of the mold 101 are provided with guide holes 105, the front end of the mold 101 is provided with an intermediate mold 106, the intermediate mold 106 is provided with hole position features aligned with the locking groove 103, the engaging holes 104, and the guide holes 105, the front end of the intermediate mold 106 is provided with a partition 107, the partition 107 is also provided with hole position features aligned with the locking groove 103, the engaging holes 104, and the guide holes 105, the front end of the partition 107 is provided with a push plate 108, the four corners of the push plate 108 are fixedly sleeved with guide shafts 109, and the shaft body of the guide shaft 109 passes through the partition 107, the intermediate mold 106 and are movably sleeved therewith, the shaft body of the guide shaft 109 and the engaging hole 104 can be loosely matched, both sides of the push plate 108 are fixedly sleeved with engaging columns 110, the engaging columns 110 penetrate the partition 107 and the intermediate mold 106 and are movably sleeved therewith, the shaft body of the engaging column 110 is movably sleeved with a return spring 111, the shaft end of the engaging column 110 and the guide hole 105 can be loosely matched, the upper and lower ends of the inner side of the push plate 108 are fixedly installed with locking plates 112, the end of the locking plate 112 is provided with an embedded groove and can be loosely matched with the locking groove 103, the center of the push plate 108 is movably sleeved with an injection tube 113, the tube body of the injection tube 113 penetrates the partition 107 and is movably sleeved therewith, the tube end of the injection tube 113 is fixedly sleeved with the intermediate mold 106 and is connected to the model cavity 102;

[0028] In this embodiment, when the first injection molding starts, the push plate 108 starts to advance under the action of external force and makes the partition 107, the intermediate mold 106, and the mold 101 fit together, the shaft body of the guide shaft 109 will enter the joint hole 104 and fit with each other with a clearance, and then the plastic is injected from the injection molding tube 113 on one side into the model cavity 102 on one side for molding, and then the model 101 on one side is rotated one hundred and eighty degrees and aligned with the push plate 108, the partition 107, and the intermediate mold 106 on the other side, and then after the mold is closed under the action of external force, another plastic is injected from the injection molding tube 113 on the other side, thereby completing the secondary injection molding process.

[0029] Reference Figure 3The rotating assembly 2 includes a rotating disk 201, and four first electric cylinders 202 are fixedly installed on the front end surface of the rotating disk 201. The end of the driving shaft of the first electric cylinder 202 is fixedly installed with a locking plate 203. The locking plate 203 and the four locking grooves 103 are aligned with each other and can be clearance-matched. A central shaft 204 is fixedly sleeved at the center of the rotating disk 201, and a rotating plate 205 is fixedly sleeved on the central shaft 204. The rotating plate 205 has two outer edge arc edges, and both sides of the rotating plate 205 are provided with mutually symmetrical concave arc grooves. The rotating plate 2 A wheel disc 206 is attached to the outer arc edge of 05, and the inner circle curvature of the wheel disc 206 is consistent with the outer arc edge curvature of the rotating plate 205. A notch is provided at the outer convex edge of the wheel disc 206, and two convex shafts 207 are provided at the notch provided on the wheel disc 206. The convex shafts 207 can cooperate with the inner concave arc groove provided on the rotating plate 205. The driving shaft of the servo motor 208 is fixedly connected at the center of the wheel disc 206, and the servo motor 208 is fixedly sleeved with a fixing ring 209, and a fixing block 210 is fixedly installed at the bottom end of the fixing ring 209;

[0030] In this embodiment, when the push plate 108, the partition plate 107, the intermediate mold 106, and the mold 101 are fitted together for mold closing, the end of the locking plate 112 enters the locking groove 103. At this time, the first electric cylinder 202 can drive the locking plate 203 to enter the locking groove 103 and lock with the embedded groove opened by the locking plate 112, so that the mold closing state is stable. After the first injection molding is completed, the servo motor 208 can drive the wheel 206 to rotate. When the convex shaft 207 enters and leaves the concave arc groove opened by the rotating plate 205, it drives the rotating plate 205 to rotate one hundred and eighty degrees, so that the outer edge arc edge on the other side of the rotating plate 205 is fitted with the inner circle of the wheel 206. This method is fast and convenient and has a high angle rotation accuracy, so it can reduce the error of mold rotation in the traditional secondary injection molding process.

[0031] Reference Figure 4 The driving assembly 3 includes a seat plate 301, and the second electric cylinder 302 is fixedly installed at the four corners of the outer side of the seat plate 301. The driving end of the second electric cylinder 302 is fixedly connected with a push rod 303. The shaft of the push rod 303 passes through the seat plate 301 and is fixedly connected with the four corners of the outer side of the push plate 108. A bearing 304 is fixedly installed at the center of the outer side of the seat plate 301. The bearing 304 is movably sleeved with a rotating shaft 305. The shaft end of the rotating shaft 305 is fixedly connected to the central axis 204. The bottom surface of the seat plate 301 is provided with evenly distributed orifice plates 306, and the bottom end of the orifice plates 306 is provided with a fan 307;

[0032] In this embodiment, the second electric cylinder 302 can drive the push rod 303 to push the push plate 108 forward and fit it with the partition 107 and the intermediate mold 106 for mold closing. During the plastic molding process, when the push plate 108, the partition 107, and the intermediate mold 106 are separated from each other, the fan 307 can drive the mold in the gap to be cooled by air, and some impurity particles inside it will also be absorbed by the airflow.

[0033] Reference Figure 5 The base assembly 4 includes a base 401, the upper end surface of the base 401 is fixedly connected to the fixed block 210, the upper end surface of the base 401 is provided with a movable groove 402, the movable groove 402 and the outer ring of the bottom end of the wheel disc 206 cooperate with each other, the base 401 is provided with a cavity groove, the upper end of the cavity groove provided by the base 401 is fixedly installed with a sealing plate 403, the upper end of the sealing plate 403 is fixedly connected with uniformly distributed pipe columns 404, the pipe body of the pipe column 404 is aligned with the upper fan 307 and fixedly connected to the bottom end of the seat plate 301, the cavity groove provided by the base 401 is fixedly installed with a filter layer 405, and both sides of the base 401 are fixedly installed with grid plates 406;

[0034] In this embodiment, when the impurity particles inside the mold are absorbed into the cavity inside the base 401 along with the air flow through the pipe column 404, the impurity particles are intercepted by the filter layer 405, and the hot air flow is discharged from the grid plate 406. This structure achieves the mold cooling and cleaning effects of the equipment.

[0035] Working principle and beneficial effects of the present invention: When the secondary injection molding mold is used, when the push plate 108, the partition plate 107, the intermediate mold 106, and the mold 101 are fitted together for mold closing, the end of the locking plate 112 enters the locking groove 103, and at this time, the first electric cylinder 202 can drive the locking plate 203 to enter the locking groove 103 and lock with the embedded groove opened by the locking plate 112, so that the mold closing state is stable. After the first injection is completed, the servo motor 208 can drive the wheel 206 to rotate, and when the convex shaft 207 enters and leaves the concave arc groove opened by the rotating plate 205, it drives the rotating plate 205 to rotate 180 degrees, so that the rotating plate 205 The outer arc edge on the other side fits with the inner circle of the wheel disc 206. This method is fast and convenient and has a high angle rotation accuracy, so it can reduce the error of mold rotation in the traditional secondary injection molding process. In the plastic molding process, when the push plate 108, the partition plate 107, and the intermediate mold 106 are separated from each other, the fan 307 can drive the mold in the gap to be air-cooled, and some impurity particles inside it will also be absorbed with the airflow. When the impurity particles inside the mold are absorbed into the cavity inside the base 401 through the pipe column 404 with the airflow, the impurity particles are intercepted by the filter layer 405, and the hot air flow is discharged from the grid plate 406. Through this structure, the mold cooling and cleaning effects of the equipment are achieved.

[0036] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0037] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0038] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A secondary injection molding mold, characterized in that: It comprises a mold assembly (1), wherein a rotating assembly (2) is provided at the back of the mold assembly (1), a driving assembly (3) is provided at the front end of the mold assembly (1), and a base assembly (4) is provided at the bottom end of the mold assembly (1); The mold assembly (1) comprises a mold (101), a model cavity (102) is provided inside the mold (101), there are two molds (101), the upper and lower end surfaces of the mold (101) are provided with locking grooves (103), the four corners of the mold (101) are provided with engaging holes (104), and the two sides of the mold (101) are provided with guide holes (105); The rotating assembly (2) comprises a rotating disk (201), four first electric cylinders (202) are fixedly mounted on the front end surface of the rotating disk (201), locking plates (203) are fixedly mounted on the end of the driving shaft of each of the first electric cylinders (202), the locking plates (203) are aligned with the four locking grooves (103) and can be clearance-matched, a central axis (204) is fixedly sleeved at the center of the rotating disk (201), a rotating plate (205) is fixedly sleeved on the central axis (204), the rotating plate (205) has two outer edge arc edges, both sides of the rotating plate (205) are provided with mutually symmetrical inner concave arc grooves, a wheel disc (206) is attached to the outer edge arc edge of the rotating plate (205), and the inner circle curvature of the wheel disc (206) is consistent with the curvature of the outer edge arc edge of the rotating plate (205).

2. A secondary injection molding mold according to claim 1, characterized in that: The front end of the mold (101) is provided with an intermediate mold (106), and the intermediate mold (106) is provided with hole position features that are aligned with the locking groove (103), the engaging hole (104), and the guide hole (105). The front end of the intermediate mold (106) is provided with a partition (107), and the partition (107) is also provided with hole position features that are aligned with the locking groove (103), the engaging hole (104), and the guide hole (105). The front end of the partition (107) is provided with a push plate (108), and the four corners of the push plate (108) are all fixedly sleeved with guide shafts (109). ), the shaft body of the guide shaft (109) passes through the partition (107) and the intermediate mold (106) and is movably sleeved therewith, the shaft body of the guide shaft (109) can be loosely fitted with the engaging hole (104), both sides of the push plate (108) are fixedly sleeved with engaging columns (110), the engaging columns (110) pass through the partition (107) and the intermediate mold (106) and are movably sleeved therewith, the shaft body of the engaging column (110) is movably sleeved with a return spring (111), and the shaft end of the engaging column (110) can be loosely fitted with the guide hole (105).

3. A secondary injection molding mold according to claim 2, characterized in that: Locking plates (112) are fixedly mounted on the inner upper and lower ends of the push plate (108); an embedded groove is provided at the end of the locking plate (112) and can be loosely matched with the locking groove (103); an injection tube (113) is movably sleeved at the center of the push plate (108); the tube body of the injection tube (113) passes through the partition (107) and is movably sleeved therewith; the tube body end of the injection tube (113) is fixedly sleeved with the intermediate mold (106) and is connected to the mold cavity (102).

4. The secondary injection molding mold according to claim 1, characterized in that: A notch is provided at the convex edge of the outer ring of the wheel disc (206), and two convex shafts (207) are provided at the notch provided on the wheel disc (206). The convex shafts (207) can cooperate with the inner concave arc groove provided on the rotating plate (205). The driving shaft of the servo motor (208) is fixedly connected at the center of the circle of the wheel disc (206), and a fixing ring (209) is fixedly sleeved on the servo motor (208). A fixing block (210) is fixedly installed at the bottom end of the fixing ring (209).

5. The secondary injection molding mold according to claim 1, characterized in that: The driving assembly (3) comprises a seat plate (301), and second electric cylinders (302) are fixedly mounted at the four corners of the outer side surface of the seat plate (301), and a push rod (303) is fixedly connected to the driving end of the second electric cylinder (302), and the shaft of the push rod (303) passes through the seat plate (301) and is fixedly connected to the four corners of the outer side surface of the push plate (108), and a bearing (304) is fixedly mounted at the center of the outer side surface of the seat plate (301), and a rotating shaft (305) is movably sleeved on the bearing (304), and the shaft end of the rotating shaft (305) is fixedly connected to the central shaft (204), and the bottom surface of the seat plate (301) is provided with evenly distributed orifice plates (306), and the bottom end of each orifice plate (306) is provided with a fan (307).

6. The secondary injection molding mold according to claim 1, characterized in that: The base assembly (4) comprises a base (401), the upper end surface of the base (401) is fixedly connected to the fixed block (210), the upper end surface of the base (401) is provided with a movable groove (402), the movable groove (402) and the bottom outer ring of the wheel disc (206) are mutually coordinated and movable, the base (401) is provided with a cavity groove, the upper end of the cavity groove provided by the base (401) is fixedly installed with a sealing plate (403), the upper end of the sealing plate (403) is fixedly connected with evenly distributed pipe columns (404), the pipe body of the pipe column (404) is aligned with the upper fan (307) and is fixedly connected to the bottom end of the seat plate (301), the cavity groove provided by the base (401) is fixedly installed with a filter layer (405), and grid plates (406) are fixedly installed on both sides of the base (401).

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