Disc type continuous extrusion die with insulating sheath

Abstract

The invention relates to the technical field of terminal strip forming, in particular to a disc type continuous extrusion die with an insulating sheath, which comprises a die frame, an injection machine, an auxiliary die, a power output main shaft, an upper cylindrical curve cam and a lower cylindrical curve cam are mounted on the die frame, and a main die turntable is in power connection with the power output main shaft. The main die turntable, the upper cylindrical curve cam and the lower cylindrical curve cam axially correspond to each other; a containing groove is formed in the outer side of the main mold rotating disc in a surrounding mode, the containing groove is divided into an injection molding area, a mold opening and core pulling area, a stripping area and a mold closing area, the auxiliary mold is in sliding butt joint with the outer side of the main mold rotating disc along the injection molding area and the mold opening and core pulling area, and a plurality of evenly-distributed product face profiling grooves are formed in the inner side of the containing groove in a surrounding mode; according to the design, continuous extrusion injection molding processing can be carried out on the associated insulating sheath, and the problems that the plastic temperature is too high and the plastic storage time is long are solved; and the insulating sheath has no joint, and the surface of the product has no connection trace.

Description

Technical Field

[0001] This invention relates to the field of terminal block forming technology, and in particular to a disc-type continuous extrusion die with an integrated insulating sheath. Background Technology

[0002] Terminal blocks are mainly composed of an insulating sheath and conductive pins that are press-fitted or riveted together. During the manufacturing process, in order to facilitate the connection of some wires, the insulating sheath is usually arranged in multiple ways to form a continuous insulating sheath. After the conductive pins are assembled on the continuous insulating sheath, it is rolled into a roll for supply.

[0003] The existing continuous insulating sleeves are mainly produced by injection molding using molds. The molding process involves mold closing, injection, pressure holding, cooling, and mold opening. However, this method cannot achieve continuous injection molding of plastic products, resulting in the inability to form longer, strip-shaped continuous insulating sleeves. Furthermore, the barrel temperature is too high, the glue storage time is too long, and there are sprue marks. The production efficiency is low, with the production capacity of continuous sleeves of different structures being approximately 80-150 pieces per minute.

[0004] Therefore, it is necessary to propose a new technical solution to address the above problems. Summary of the Invention

[0005] To overcome the shortcomings mentioned above, the present invention aims to provide a technical solution that can solve the above problems.

[0006] A continuous extrusion die with an insulating sheath includes a die frame, on which an injection molding machine, a sub-die, a power output spindle, an upper cylindrical cam, and a lower cylindrical cam are mounted. A main die turntable is poweredly connected to the power output spindle, and the main die turntable, the upper cylindrical cam, and the lower cylindrical cam are axially aligned. A receiving groove is formed around the outer side of the main die turntable, which is divided into an injection molding area, a mold opening and core pulling area, a stripping area, and a mold closing area. The sub-die slides and docks with the outer side of the main die turntable along the injection molding area and the mold opening and core pulling area. Multiple evenly distributed product surface contouring grooves are formed around the inner side of the receiving groove. The product surface contouring grooves and the sub-die dock to form a mold cavity for molding the outer surface of the product. The injection molding machine docks with the mold cavity of the injection molding area along the sub-die. Multiple first mold-closing push rods, corresponding to the mold cavity, are arranged around the upper edge of the main mold turntable. The first mold-closing push rods are guided and engaged with the main mold turntable. The first mold-closing push rods are equipped with first product inner contour inserts that can extend into the mold cavity. Multiple second mold-closing push rods, corresponding to the mold cavity, are arranged around the lower edge of the main mold turntable. The second mold-closing push rods are guided and engaged with the main mold turntable. The second mold-closing push rods are equipped with second product inner contour inserts that can extend into the mold cavity. An upper cylindrical curve cam and a lower cylindrical curve cam act on the first mold-closing push rods and the second mold-closing push rods, respectively. Curved cam grooves are opened around the outer sides of both the upper and lower cylindrical curve cams. Guide wheels that are movably connected to the curved cam grooves are provided on both the first and second mold-closing push rods.

[0007] Preferably, the first and second mold closing ejectors corresponding to the injection molding zone are held within the mold cavity by being guided by the curved cam groove; the first and second mold closing ejectors corresponding to the mold opening and core pulling zone are pulled out of the mold cavity by being guided by the curved cam groove; the first and second mold closing ejectors corresponding to the stripping zone are held outside the mold cavity by being guided by the curved cam groove; and the first and second mold closing ejectors corresponding to the mold closing zone are inserted into the mold cavity by being guided by the curved cam groove.

[0008] Preferably, the mold frame includes a left template, a right template, an upper template, and a lower template. The upper and lower templates are both fan-shaped structures, and the upper and lower templates correspond to each other vertically. The left and right templates are installed on the straight edges of the upper and lower templates at an angle, so that the mold frame is enclosed by the left, right, upper, and lower templates to form a structure with a wide-angle opening. The power output spindle is rotatably connected between the left and right templates, so that the main mold turntable, the upper cylindrical curve cam, and the lower cylindrical curve cam are placed between the left, right, upper, and lower templates. The stripping area and the mold closing area correspond to the wide-angle opening of the mold frame. The injection molding machine and the sub-mold are installed on the left or right template.

[0009] Preferably, the secondary mold has an arc surface corresponding to the receiving groove, and the secondary mold forms a mold cavity by combining the arc surface with the contour groove of the product face.

[0010] Preferably, multiple guide grooves are evenly distributed at the upper and lower positions of the corresponding receiving groove on the main mold turntable, and both the first mold closing push rod and the second mold closing push rod are provided with guide sliders. The first mold closing push rod and the second mold closing push rod are guided and cooperated with the main mold turntable through the cooperation of the guide sliders and the guide grooves.

[0011] Preferably, the guide wheel is a roller cam bearing.

[0012] Preferably, the main mold turntable includes an upper mold turntable and a lower mold turntable, which are mated and cooperate with each other, and a receiving groove is formed between the upper mold turntable and the lower mold turntable.

[0013] Preferably, multiple evenly distributed inlay slots are provided at the positions corresponding to the inner sides of the receiving slots at the lower ends of the upper and lower mold turntables. Inlay blocks are provided in the inlay slots, and each inlay block has at least one product face contouring groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are: By utilizing rotary extrusion and setting curved cam grooves through rotational motion, synchronous mold closing and core pulling operations are achieved. A power output spindle is positioned in front of the secondary mold to support the main mold turntable, allowing it to rotate in tandem with the secondary mold turntable. Furthermore, upper and lower cylindrical curved cams are axially positioned at the upper and lower levels of the main mold turntable, respectively. A first and second mold closing push rod are guided and connected to the main mold turntable. Guide wheels engage with the curved cam grooves on the upper and lower cylindrical curved cams, enabling the main mold turntable to rotate using the curved cam grooves, even when driven by the power output spindle. The cam groove guides and synchronously drives the first and second mold closing push rods to perform mold closing or core pulling operations at designated positions. After the raw material is held under pressure and cooled, it is separated from the sub-mold, thus enabling the molding of the inner side of the connecting insulating sleeve. At the same time, the rotational extrusion method of the sub-mold and main mold turntable achieves the integrated molding of a continuous connecting insulating sleeve. This design can perform continuous extrusion injection molding of the connecting insulating sleeve, solving the problems of excessive plastic temperature and long plastic storage time. Moreover, the connecting insulating sleeve has no joints, no connection marks on the product surface, and no sprue. Its injection molding efficiency is high, and the production capacity of connecting insulating sleeves with different structures is about 300-600 PCS / minute.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an exploded structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention after removing the mold frame and part of the sub-mold; Figure 3 In this invention Figure 2A schematic diagram of the cross-sectional structure; Figure 4 This is the present invention. Figure 3 Schematic diagram of the structure at point A; Figure 5 This is a schematic diagram of the main mold turntable, a portion of the sub-mold, and a portion of the mold closing push rod of the present invention; Figure 6 This is a schematic diagram of the disassembled structure of the main mold turntable in this invention.

[0018] The reference numerals and names in the figure are as follows: Mold base 10, left mold plate 11, right mold plate 12, upper mold plate 13, lower mold plate 14, injection molding machine 20, auxiliary mold 30, power output spindle 40, main mold turntable 50, upper mold turntable 501, lower mold turntable 502, receiving groove 51, product face contouring groove 52, guide slide 54, guide slider 55, insert groove 56, insert block 57, upper cylindrical curve cam 60, first mold closing push rod 61, first product inner contouring insert 62, lower cylindrical curve cam 70, second mold closing push rod 71, second product inner contouring insert 72, curve cam groove 80, guide wheel 81, injection molding area a, mold opening and core pulling area b, stripping area c, mold closing area d. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-6 In this embodiment of the invention, a continuous extrusion die with an integrated insulating sheath disc includes a die frame 10. An injection molding machine 20, a secondary die 30, a power output spindle 40, an upper cylindrical curve cam 60, and a lower cylindrical curve cam 70 are mounted on the die frame 10. A main die turntable 50 is poweredly connected to the power output spindle 40, and the main die turntable 50, the upper cylindrical curve cam 60, and the lower cylindrical curve cam 70 are axially corresponding. A receiving groove 5 is formed around the outer side of the main die turntable 50. 1. The receiving groove 51 is divided into an injection molding area a, a mold opening and core pulling area b, a stripping area c, and a mold closing area d. The sub-mold 30 slides and docks with the outside of the main mold turntable 50 along the injection molding area a and the mold opening and core pulling area b. Multiple evenly distributed product surface contouring grooves 52 are opened around the inner side of the receiving groove 51. The product surface contouring grooves 52 and the sub-mold 30 dock to form a mold cavity for molding the outer surface of the product. The injection machine 20 docks with the mold cavity of the injection molding area a along the sub-mold 30. Multiple first mold-closing push rods 61, corresponding to the mold cavity, are arranged around the upper edge of the main mold turntable 50. The first mold-closing push rods 61 are guided and engaged with the main mold turntable 50. The first mold-closing push rods 61 are provided with a first product inner contour insert 62 that can extend into the mold cavity. Multiple second mold-closing push rods 71, corresponding to the mold cavity, are arranged around the lower edge of the main mold turntable 50. The second mold-closing push rods 71 ​​are guided and engaged with the main mold turntable 50. The second mold-closing push rods 71 ​​are provided with a second product inner contour insert 72 that can extend into the mold cavity. An upper cylindrical curve cam 60 and a lower cylindrical curve cam 70 act on the first mold-closing push rods 61 and the second mold-closing push rods 71, respectively. Curved cam grooves 80 are opened around the outer sides of both the upper cylindrical curve cam 60 and the lower cylindrical curve cam 70. Guide wheels 81 that are movably connected to the curved cam grooves 80 are provided on both the first mold-closing push rods 61 and the second mold-closing push rods 71.

[0021] In the above technical solution, a power output spindle 40 is set in front of the secondary mold 30 to support the main mold turntable 50, so that the main mold turntable 50 can rotate with the secondary mold 30 turntable. The main mold turntable 50 is used to set the facial contouring groove 52 of the product, mainly for molding the facial surface with an insulating sheath. The secondary mold 30 is a stationary structure mold with a shaped surface, used to mold the back of the product, and the molded back is a flat surface. After the main mold turntable 50 and the secondary mold 30 are combined, they can... The entire outer surface of the molded insulating sleeve is formed, and a sub-mold 30 is set around a part of the main mold turntable 50, mainly around its injection molding area a and mold opening and core pulling area b. Then, the material is fed along the sub-mold 30 by the injection machine 20. The raw material enters the sub-mold 30 through the injection machine 20 and is injected into the mold cavity between the main mold turntable 50 and the sub-mold 30. The main mold turntable 50 is continuously rotated by the drive of the power output spindle 40. After pressure holding and cooling, the raw material leaves the sub-mold 30 and is formed into a continuous insulating sleeve. Based on this, an upper cylindrical curve cam 60 and a lower cylindrical curve cam 70 are axially arranged at the upper and lower positions of the main mold turntable 50, respectively. A first mold closing push rod 61 and a second mold closing push rod 71 are provided to guide and connect to the main mold turntable 50. The first mold closing push rod 61 and the second mold closing push rod 71 are respectively provided with a first product inner side contour insert 62 and a second product inner side contour insert 72 for forming the inner side of the connecting insulating sleeve. By using the guide wheel 81 to cooperate with the curve cam groove 80 on the upper cylindrical curve cam 60 and the lower cylindrical curve cam 70, when the main mold turntable 50 is rotated by the power output main shaft 40, the first mold closing push rod 61 and the second mold closing push rod 71 can be synchronously driven to perform mold closing or core pulling operations at designated positions by the guide of the curve cam groove 80. Thus, it is possible to achieve the forming of the inner side of the connecting insulating sleeve while cooperating with the rotational extrusion method of the sub-mold 30 and the main mold turntable 50 to achieve integrated forming of a continuous connecting insulating sleeve. Therefore, this setup allows for continuous extrusion injection molding of the connecting insulating sleeve, solving the problems of excessively high plastic temperature and long storage time. Furthermore, the connecting insulating sleeve has no joints, no connection marks on the product surface, and no sprue material, resulting in high injection molding efficiency. The production capacity of connecting insulating sleeves with different structures is approximately 300-600 PCS / minute.

[0022] Please see Figure 2-3 In this embodiment, the circuit of the curved cam groove 80 is configured such that the first mold closing push rod 61 and the second mold closing push rod 71 corresponding to the injection molding zone a are kept in the mold cavity by being guided by the curved cam groove 80; the first mold closing push rod 61 and the second mold closing push rod 71 corresponding to the mold opening and core pulling zone b are pulled out of the mold cavity by being guided by the curved cam groove 80; the first mold closing push rod 61 and the second mold closing push rod 71 corresponding to the stripping zone c are kept outside the mold cavity by being guided by the curved cam groove 80; and the first mold closing push rod 61 and the second mold closing push rod 71 corresponding to the mold closing zone d are inserted into the mold cavity by being guided by the curved cam groove 80. One rotation of the power output spindle 40 enables the periodic actions of mold closing, injection molding, core pulling, and demolding. After demolding, the connecting insulating sleeve is pulled out and connected to the winding mechanism to complete the material winding, enabling the connecting insulating sleeve to achieve continuous injection molding and automatic winding operations.

[0023] Please see Figure 1In this embodiment, the mold frame 10 includes a left template 11, a right template 12, an upper template 13, and a lower template 14. The upper template 13 and the lower template 14 are both fan-shaped structures, and the upper template 13 and the lower template 14 are vertically aligned. The left template 11 and the right template 12 are installed on the straight edges of the upper template 13 and the lower template 14 at an angle, so that the mold frame 10 is enclosed by the left template 11, the right template 12, the upper template 13, and the lower template 14 to form a structure with a wide-angle opening. The power output main shaft 40 is rotatably connected between the left template 11 and the right template 12, so that the main mold turntable 50, the upper cylindrical curve cam 60, and the lower cylindrical curve cam 70 are placed between the left template 11, the right template 12, the upper template 13, and the lower template 14, and the stripping area c and the mold closing area d correspond to the wide-angle opening of the mold frame 10. The injection molding machine 20 and the auxiliary mold 30 are installed on the left template 11 or the right template 12. With this setup, a wide-angle design is used to work with the main mold turntable 50, the upper cylindrical curve cam 60, and the lower cylindrical curve cam 70, resulting in a clever and compact overall design. In addition, the secondary mold 30 has an arc surface corresponding to the receiving groove 51, and the secondary mold 30 forms a mold cavity by combining the arc surface with the product face contour groove 52.

[0024] Please see Figure 2 , Figure 5 and Figure 6 In this embodiment, multiple guide grooves 54 are evenly distributed at the upper and lower positions of the corresponding receiving groove 51 on the main mold turntable 50. The first mold closing push rod 61 and the second mold closing push rod 71 are both provided with guide sliders 55. The first mold closing push rod 61 and the second mold closing push rod 71 are guided and engaged with the main mold turntable 50 through the cooperation of the guide sliders 55 and the guide grooves 54. The guide wheel 81 is a roller cam bearing. Roller cam bearings have high strength and high precision, which makes the setting simple, compact and reliable. The guide sliders 55 and guide grooves 54 are preferably square to ensure that the first mold closing push rod 61 and the second mold closing push rod 71 will not rotate.

[0025] Please see Figure 2-6In this embodiment, the main mold turntable 50 includes an upper mold turntable 501 and a lower mold turntable 502. The upper mold turntable 501 and the lower mold turntable 502 are mated together, and a receiving groove 51 is formed between the upper mold turntable 501 and the lower mold turntable 502 to facilitate the setting of the product face contour groove 52 structure. Furthermore, one end of the insulating sleeve is used to connect the conductive pin, and the other end is used to insert the wire. The two will produce different structures and will have different types depending on the different models of conductive pins and wires. Setting the main mold turntable 50 as an upper mold turntable 501 and a lower mold turntable 502 will facilitate flexible replacement. In addition, multiple evenly distributed inlay grooves 56 can be opened at the lower end of the upper mold turntable 501 and the lower mold turntable 502 corresponding to the inner side of the receiving groove 51. An inlay block 57 is set in the inlay groove 56, and at least one product face contour groove 52 is opened on each inlay block 57, which greatly improves the flexibility of injection molding different products.

[0026] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A disc-type continuous extrusion die with an integrated insulating sheath, characterized in that, The system includes a mold base, on which an injection molding machine, a sub-mold, a power output spindle, an upper cylindrical cam, and a lower cylindrical cam are mounted. A main mold turntable is poweredly connected to the power output spindle, and the main mold turntable, the upper cylindrical cam, and the lower cylindrical cam are axially aligned. A receiving groove is formed around the outer side of the main mold turntable, which is divided into an injection molding area, a mold opening and core pulling area, a stripping area, and a mold closing area. The sub-mold slides along the injection molding area and the mold opening and core pulling area and docks with the outer side of the main mold turntable. Multiple evenly distributed product surface contouring grooves are formed around the inner side of the receiving groove. The product surface contouring grooves dock with the sub-mold to form a mold cavity for molding the outer surface of the product. The injection molding machine docks with the mold cavity in the injection molding area along the sub-mold. Multiple first mold-closing push rods, corresponding to the mold cavity, are arranged around the upper edge of the main mold turntable. The first mold-closing push rods are guided and engaged with the main mold turntable. The first mold-closing push rods are equipped with first product inner contour inserts that can extend into the mold cavity. Multiple second mold-closing push rods, corresponding to the mold cavity, are arranged around the lower edge of the main mold turntable. The second mold-closing push rods are guided and engaged with the main mold turntable. The second mold-closing push rods are equipped with second product inner contour inserts that can extend into the mold cavity. An upper cylindrical curve cam and a lower cylindrical curve cam act on the first mold-closing push rods and the second mold-closing push rods, respectively. Curved cam grooves are opened around the outer sides of both the upper and lower cylindrical curve cams. Guide wheels that are movably connected to the curved cam grooves are provided on both the first and second mold-closing push rods.

2. The disc-type continuous extrusion die with an integrated insulating sheath as described in claim 1, characterized in that, The first and second mold closing ejectors corresponding to the injection molding zone are held inside the mold cavity by being guided by the curved cam groove. The first and second mold closing ejectors corresponding to the mold opening and core pulling zone are pulled out of the mold cavity by being guided by the curved cam groove. The first and second mold closing ejectors corresponding to the stripping zone are held outside the mold cavity by being guided by the curved cam groove. The first and second mold closing ejectors corresponding to the mold closing zone are extended into the mold cavity by being guided by the curved cam groove.

3. The disc-type continuous extrusion die with an integrated insulating sheath according to claim 1, characterized in that, The mold base includes a left mold plate, a right mold plate, an upper mold plate, and a lower mold plate. The upper and lower mold plates are both fan-shaped structures, and they correspond vertically. The left and right mold plates are installed at an angle on the straight edges of the upper and lower mold plates, so that the mold base is enclosed by the left, right, upper, and lower mold plates to form a structure with a wide-angle opening. The power output spindle is rotatably connected between the left and right mold plates, so that the main mold turntable, the upper cylindrical curve cam, and the lower cylindrical curve cam are placed between the left, right, upper, and lower mold plates, and the stripping area and the mold closing area correspond to the wide-angle opening of the mold base. The injection molding machine and the sub-mold are installed on the left or right mold plate.

4. The disc-type continuous extrusion die with an integrated insulating sheath according to claim 1, characterized in that, The secondary mold has an arc surface corresponding to the receiving groove. The secondary mold forms a mold cavity by combining the arc surface with the contour groove of the product face.

5. A disc-type continuous extrusion die with an integrated insulating sheath as described in claim 1, characterized in that, Multiple guide grooves are evenly distributed at the upper and lower positions of the corresponding receiving groove on the main mold turntable. The first mold closing push rod and the second mold closing push rod are both equipped with guide sliders. The first mold closing push rod and the second mold closing push rod are guided and cooperated with the main mold turntable through the cooperation of the guide sliders and guide grooves.

6. A disc-type continuous extrusion die with an integrated insulating sheath according to claim 1, characterized in that, The guide wheel is a roller cam bearing.

7. A disc-type continuous extrusion die with an integrated insulating sheath according to claim 1, characterized in that, The main mold turntable includes an upper mold turntable and a lower mold turntable, which are connected and cooperate with each other, forming a receiving groove between them.

8. A disc-type continuous extrusion die with an integrated insulating sheath according to claim 7, characterized in that, Multiple evenly distributed inlay slots are provided at the positions corresponding to the inner side of the receiving groove at the lower end of the upper mold turntable and the lower mold turntable. Inlay blocks are provided in the inlay slots, and each inlay block has at least one product face contouring groove.

Images