A mold, vulcanization equipment and method for automatic demolding of a ring-shaped plastic part

Abstract

The present invention provides a mold and a method for automatic demolding of a ring-shaped plastic part, including a mold core for vulcanizing and molding the ring-shaped plastic part. The mold core includes a punch and a die corresponding to each other, and further includes a base, a strip and a lifting frame. The base is arranged on a workbench and is equipped with a strip thereon; the strip and the lifting frame are independent components, and the strip is installed in the lifting frame; the lifting frame is connected to a lifting device of a vulcanization device; a method for automatic demolding of a ring-shaped plastic part is also provided; the present invention aims to achieve automatic demolding of the ring-shaped plastic part, reduce the labor intensity of workers, improve production efficiency, and reduce the wear of the mold easily caused by manual operation, thereby improving the mold life.

Description

Technical Field

[0001] The present invention belongs to the field of vulcanization molds, and particularly relates to a mold and method for automatically demolding an annular plastic part. Background Art

[0002] An annular plastic part refers to a plastic workpiece with an overall ring shape, such as a sealing ring, a washer, etc. After the vulcanization equipment forms the annular plastic part, demolding is required; since the annular plastic part usually has a relatively small size and a thin side wall, in order to ensure the quality of the workpiece, a cavity is usually formed by a punch and a die. During vulcanization molding, the rubber material enters the cavity between the punch and the die through the injection port for workpiece vulcanization molding; however, during demolding, since the punch abuts against the inner side wall of the plastic workpiece, in order to ensure the quality of the tool, especially when processing annular plastic parts with high machining accuracy requirements, manual demolding is generally adopted, which has a high labor intensity of workers and a low production efficiency. Summary of the Invention

[0003] In view of this, the present invention aims to provide a mold and method for automatically demolding an annular plastic part to realize automatic demolding of the annular plastic part. The present invention can reduce the labor intensity of workers, improve the production efficiency, reduce the wear of the mold caused by manual operation, and thus improve the mold life.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows:

[0005] In a first aspect, the present invention provides a mold for automatically demolding an annular plastic part, including a mold core for vulcanization molding of the annular plastic part. The mold core includes a punch and a die arranged corresponding to each other, and further includes a base, a strip, and a lifting frame. The base is arranged on the workbench and is equipped with the strip; the strip and the lifting frame are independent components, and the strip is installed in the lifting frame; the lifting frame is connected to the lifting device of the vulcanization equipment;

[0006] The strip includes a rotating rod and auxiliary rods respectively arranged on both sides of the rotating rod. The rotating rod and the auxiliary rods are independent structures, and a space for vulcanization molding of the annular plastic part is formed between the rotating rod and the auxiliary rods. The punch and the die are respectively arranged on the rotating rod and the auxiliary rods. The two ends of the rotating rod are respectively equipped with rotating shafts, and the rotating rod can rotate around the axis of the rotating shaft; the two ends of the auxiliary rod are respectively connected with pulleys, and the pulleys can rotate around the axis of the auxiliary rod;

[0007] The lifting frame is a frame, and guide plates are respectively arranged on two opposite sides of the frame. Main guide grooves and auxiliary guide grooves are arranged on the guide plates. The main guide grooves are vertically arranged, and auxiliary guide grooves are respectively arranged at intervals on both sides of the main guide grooves. The auxiliary guide grooves are inclined outward from the main guide grooves and are mirror-symmetrical to each other; the rotating shafts are installed in the main guide grooves and reciprocate along the main guide grooves, and the pulleys are installed in the auxiliary guide grooves and reciprocate along the auxiliary guide grooves.

[0008] Further, the included angle between the secondary guiding groove and the primary guiding groove is 30° to 60°, and a vertical guiding side wall is provided at the lower part of the secondary guiding groove.

[0009] Further, a supporting bottom for carrying the rotating shaft is provided at the bottom of the primary guiding groove, and a lower opening is provided at the bottom end of the secondary guiding groove.

[0010] Further, the lifting frame is integrally rectangular, and a movable frame that can be opened outwards is provided thereon. The movable frame is located between two guiding plates. One end of the movable frame is rotationally connected to the lifting frame through a hinge, and the other end is detachably connected to the lifting frame through a movable bolt.

[0011] Further, a bolt hole is formed on the movable frame, and the movable bolt is fitted in the bolt hole.

[0012] Further, an upper template is further included. An injection port is provided on the upper template, and the injection port is arranged in cooperation with the mold core.

[0013] Further, a plurality of mold cores are included and are arranged at intervals along the length direction of the rotating rod.

[0014] In a second aspect, the present invention provides a vulcanization device for automatically demolding a ring-shaped plastic part, and the vulcanization device is equipped with the mold for automatically demolding the ring-shaped plastic part as described above.

[0015] In a third aspect, the present invention provides a method for automatically demolding a ring-shaped plastic part. Using the mold for automatically demolding the ring-shaped plastic part as described above, the method includes the following steps:

[0016] S1. Place the insert bar and the lifting frame on the vulcanization device. The lifting frame is connected to the external ejection mechanism of the vulcanization device, and start the vulcanization device to form the ring-shaped plastic part; the external ejection mechanism can drive the lifting frame to rise or fall;

[0017] S2. After the ring-shaped plastic part is formed, the external ejection mechanism drives the lifting frame to rise to sequentially achieve a first action and a second action. The first action is: the pulley rolls downward along the secondary guiding groove, and the secondary rod is separated from the rotating rod; the second action is: the rotating rod rises to drive the punch on the rotating rod and the ring-shaped plastic part connected to the punch to rise;

[0018] Further, after the step S2, the following steps are further included:

[0019] S3. Open the movable frame and remove the ring-shaped plastic part from the punch on one side of the rotating rod;

[0020] S4. Rotate the rotating rod and remove the ring-shaped plastic part from the punch on the other side of the rotating rod.

[0021] Compared with the prior art, the mold and method for automatic demolding of the annular plastic part of the present invention have the following advantages:

[0022] When the mold of the present invention demolds, through the cooperation of the insert bar and the lifting frame, when the lifting frame is driven by the lifting drive component to rise, the secondary rod moves along the secondary guide groove, forming the movement of the secondary rod to the outside of the rotating rod, realizing the separation of the punch from the product as the lifting frame rises, achieving the effect of automatic demolding; the present invention can reduce the labor intensity of workers, improve production efficiency, and reduce the wear of the mold caused by manual operation, thereby improving the service life of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0024] Figure 1 is a schematic diagram of the overall structure of the mold according to the embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of the annular plastic part according to the embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of the structure of the insert bar according to the embodiment of the present invention;

[0027] Figure 4 is a schematic diagram of the structure of the lifting frame according to the embodiment of the present invention;

[0028] Figure 5 is a schematic diagram of the structure of the main guide groove and the secondary guide groove according to the embodiment of the present invention;

[0029] Figure 6 is a schematic diagram of the mold closing state according to the embodiment of the present invention;

[0030] Figure 7 is a schematic diagram of the mold opening state according to the embodiment of the present invention;

[0031] Figure 8 is a schematic diagram of the first action state according to the embodiment of the present invention;

[0032] Figure 9 is a schematic diagram of the second action state according to the embodiment of the present invention;

[0033] Figure 10 is a schematic diagram of the state of opening the movable frame according to the embodiment of the present invention;

[0034] Figure 11 is a schematic diagram of the state of rotating the rotating rod according to the embodiment of the present invention.

[0035] Description of the reference numerals:

[0036] 1 - Insert strip; 2 - Lifting frame; 3 - Movable frame; 4 - Upper template; 5 - Base; 6 - Bolt hole; 8 - Insert strip base; 9 - Pressure plate; 101 - Rotating rod; 102 - Punch; 103 - Ring-shaped plastic part; 104 - Die; 105 - Sub-rod; 106 - Pulley; 107 - Rotating shaft; 201 - Guide plate; 202 - Sub-guide groove; 203 - Main guide groove; 204 - Support bottom; 205 - Vertical guide wall; 301 - Hinge; 302 - Movable bolt. Detailed implementation manners

[0037] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0038] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0039] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 9 shown, a mold for automatic demolding of a ring-shaped plastic part includes a mold core for molding the ring-shaped plastic part. The mold core includes a punch 102 and a die 104 that are correspondingly arranged. It also includes a base 5, an insert strip 1, and a lifting frame 2. The base 1 is arranged on the workbench, and the insert strip 1 is installed thereon; the insert strip 1 and the lifting frame 2 are independent components, and the insert strip 1 is installed in the lifting frame 2; the lifting frame 2 is connected to the lifting device of the vulcanization equipment; specifically, in this embodiment, based on a vertical vulcanizing molding machine, the lifting device is the external ejection mechanism of the vulcanization equipment.

[0040] As Figure 3 、 Figure 8 、 Figure 9 、 Figure 11 shown, the insert strip 1 includes a rotating rod 101 and sub-rods 105 respectively arranged on both sides of the rotating rod 101. The rotating rod 101 and the sub-rods 105 are independent structures, and a space for molding the ring-shaped plastic part 103 is formed between the rotating rod 101 and the sub-rods 105. The punch 102 and the die 104 are respectively arranged on the rotating rod 101 and the sub-rods 105. The two ends of the rotating rod 101 are respectively equipped with a rotating shaft 107, and the rotating rod 101 can rotate around the axis of the rotating shaft 107; the two ends of the sub-rods 105 are respectively connected to pulleys 106, and the pulleys 106 can rotate around the axis of the sub-rods 105;

[0041] As Figure 4As shown, the lifting frame is a frame, and guide plates 201 are respectively arranged on two opposite sides of the frame. A main guide groove 203 and a secondary guide groove 202 are arranged on the guide plate 201. The main guide groove 203 is vertically arranged, and the secondary guide grooves 202 are respectively arranged at intervals on both sides of the main guide groove 203. The secondary guide grooves 202 are inclined outward from the main guide groove 203 and are mirror-symmetrical to each other.

[0042] As Figure 5 , Figure 11 , Figure 8 As shown, the rotating shaft 107 is fitted in the main guide groove 203 and reciprocates along the main guide groove 203, and the pulley 103 is fitted in the secondary guide groove 202 and reciprocates along the secondary guide groove 202. As one of the preferred embodiments of the present invention, the included angle between the secondary guide groove and the main guide groove is 30° to 60°, and a vertical guide side wall 205 is arranged at the lower part of the secondary guide groove. The pulley rolls along the secondary guide groove and vertically slides down onto the base 5 along the vertical guide side wall, preventing the pulley from slipping out obliquely and improving safety. A base 8 for carrying the insert strip 1 can also be arranged on the base 5.

[0043] It should be further noted that before the vertical vulcanization molding machine performs molding, it first closes the mold. As Figure 6 shown in the schematic diagram of the mold closing state, the pressure plate 9 presses down on the upper template 4, and the gate of the upper template 4 is docked with the mold core for workpiece injection; after the workpiece injection is completed, the mold is opened. As Figure 7 shown in the schematic diagram of the mold opening state, the pressure plate 9 and the upper template 4 rise. The mold for automatically demolding a ring-shaped plastic part provided by the present invention can be applied to a vertical injection machine and a vertical hydraulic press.

[0044] As Figure 2 shown, as one of the embodiments, the workpiece is a ring-shaped part, its side wall is arc-shaped, and the side wall has a folding structure. The concave mold and the convex mold are designed according to the workpiece structure. Specifically, the concave mold can be separated from the workpiece, and after separation, the workpiece is hung on the convex mold.

[0045] The mold for automatically demolding a ring-shaped plastic part provided by the present invention is based on a vertical vulcanization molding machine for injection. After the workpiece is injected and the mold is opened, through the mutual cooperation of the insert strip 1 and the lifting frame 2, when the lifting frame 2 is driven by the lifting device of the vulcanization equipment to rise, the secondary rod 105 moves along the secondary guide groove 202, the secondary rod 105 moves outward from the rotating rod 101, and the secondary rod 105 is separated from the rotating rod 101, realizing the separation of the concave mold 104 from the product and achieving the effect of automatic demolding; it should be further noted that when injecting a ring-shaped plastic part, the insert strip 1 and the lifting frame 2 are placed on the vulcanization equipment together for injection. After the injection is completed, the lifting frame 2 rises to realize automatic demolding; the operation steps are simplified and it is convenient to operate; the present invention can reduce the labor intensity of workers, improve production efficiency, and reduce the wear of the mold caused by manual operation, thereby improving the mold life.

[0046] As Figure 4 , Figure 5 shown, a support base 204 for supporting the rotating shaft 107 is provided at the bottom of the main guide groove 203, and a lower opening 202 is provided at the bottom end of the secondary guide groove 202. Its function is that when the lifting frame rises, the rotating shaft 107 is mounted on the support base 204 and rises with the lifting frame 2; the pulley 106 of the secondary rod 105 moves downward along the secondary guide groove 202 and moves out from the lower opening 202. After the lifting frame is separated from the base, it can rise to a higher position, so that the workpiece rises with the lifting frame above the secondary rod, which is more convenient for operation.

[0047] As Figure 4 , Figure 1 shown, the whole lifting frame 2 is rectangular, and there is a movable frame 3 that can be opened outwardly thereon. The movable frame 3 is located between two guide plates 201. One end of the movable frame 3 is rotatably connected to the lifting frame through a hinge 301, and the other end is detachably connected to the lifting frame through a movable bolt 302. As Figure 1 shown, a bolt hole 6 is opened on the movable frame 3, and the movable bolt 301 is fitted into the bolt hole 6. In order to be more convenient for operation, a movable frame 3 that can be opened is provided, and it is more convenient to take the workpiece.

[0048] As Figure 1 shown, it further includes an upper template 4, and an injection port is provided on the upper template 4, and the injection port is arranged in cooperation with the mold core. When forming a ring-shaped plastic part, an upper template is usually provided, and the rubber material enters the cavity between the convex mold 102 and the concave mold 104 through the injection port for workpiece injection.

[0049] As Figure 3 shown, there are multiple mold cores, which are arranged at intervals along the length direction of the rotating rod 101. Multiple ring-shaped plastic parts are formed at the same time, and automatic demolding of multiple ring-shaped plastic parts is realized, reducing the labor intensity of workers and improving production efficiency.

[0050] Based on the above-mentioned mold for automatic demolding of ring-shaped plastic parts, the present invention also discloses a vulcanization device for automatic demolding of ring-shaped plastic parts, which is equipped with the above-mentioned mold for automatic demolding of ring-shaped plastic parts.

[0051] Based on the above-mentioned mold for automatic demolding of ring-shaped plastic parts, the present invention also provides a method for automatic demolding of ring-shaped plastic parts, using the above-mentioned mold for automatic demolding of ring-shaped plastic parts, including the following steps:

[0052] As Figure 6 shown, S1, place the insert 1 and the lifting frame 2 on the vulcanization device, connect the lifting frame 2 to the external ejection mechanism of the vulcanization device, and start the vulcanization device to inject the ring-shaped plastic part; the external ejection mechanism can drive the lifting frame 2 to rise or fall;

[0053] As shown Figure 7 in Figure 7 , after forming the ring-shaped plastic part, the outer ejection mechanism drives the lifting frame 2 to rise, sequentially realizing the first action and the second action. As shown Figure 8 in Figure 8 , the first action is that the pulley 106 rolls downward along the secondary guide groove 202, and the secondary rod 105 separates from the rotating rod 101. As shown Figure 9 in Figure 9 , the second action is that the rising of the rotating rod 101 drives the punch 102 on the rotating rod 101 and the ring-shaped plastic part 103 connected to the punch 102 to rise.

[0054] A method for automatically demolding a ring-shaped plastic part provided by the present invention, according to steps S1 and S2, the outer ejection mechanism can drive the lifting frame 2 to rise, lift the rotating rod 101 upward, and can simultaneously realize two actions of demolding the workpiece and lifting the workpiece, separate the punch 104 from the ring-shaped plastic part 103 to realize automatic demolding, and the ring-shaped plastic part 103 can continue to rise alone to separate from the base and the female mold and rise above the base, facilitating the worker to pick up the part; the present invention can reduce the labor intensity of the worker, improve the production efficiency, and reduce the wear of the mold caused by manual operation, thereby improving the mold life.

[0055] As shown Figure 10 , Figure 11 in Figure 10 and Figure 11 , after the step S2, the following steps are further included: S3, open the movable frame 3, and remove the ring-shaped plastic part 103 from the punch 102 on one side of the rotating rod 101; S4, rotate the rotating rod 101, and remove the ring-shaped plastic part 103 from the punch 102 on the other side of the rotating rod 101. Further improve the convenience of the worker's part-taking operation. When the parts on one side are taken, turn the rotating rod 101 by hand to remove the ring-shaped plastic parts on the other side, which is more convenient and further improves the work efficiency.

[0056] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mold for automatic demolding of a ring-shaped plastic part, comprising a mold core for vulcanizing and molding the ring-shaped plastic part, the mold core including a punch and a die which are correspondingly arranged, and characterized in that: It also includes a base, a strip and a lifting frame. The base is arranged on the workbench and is equipped with the strip thereon; the strip and the lifting frame are independent components, and the strip is installed in the lifting frame; the lifting frame is connected to the lifting device of the vulcanization equipment; The strip includes a rotating rod and auxiliary rods respectively arranged on both sides of the rotating rod. The rotating rod and the auxiliary rods are independent structures, and a space for forming a ring-shaped plastic part is formed between the rotating rod and the auxiliary rods. The male mold and the female mold are respectively arranged on the rotating rod and the auxiliary rods. The two ends of the rotating rod are respectively equipped with rotating shafts, and the rotating rod can rotate around the axis of the rotating shaft; the two ends of the auxiliary rod are respectively connected with pulleys, and the pulleys can rotate around the axis of the auxiliary rod; The lifting frame is a frame, and guide plates are respectively arranged on two opposite sides of the frame. Main guide grooves and auxiliary guide grooves are arranged on the guide plates. The main guide grooves are vertically arranged, and auxiliary guide grooves are respectively arranged at intervals on both sides of the main guide grooves. The auxiliary guide grooves are inclined outward from the main guide grooves and are mirror-symmetrical to each other; the rotating shafts are installed in the main guide grooves and reciprocate along the main guide grooves, and the pulleys are installed in the auxiliary guide grooves and reciprocate along the auxiliary guide grooves; The whole lifting frame is rectangular, and there is a movable frame that can be opened outward thereon. The movable frame is located between the two guide plates. One end of the movable frame is rotationally connected to the lifting frame through a hinge, and the other end is detachably connected to the lifting frame through a movable bolt.

2. The mold for automatic demolding of the annular plastic part according to claim 1, characterized in that: The included angle between the auxiliary guide groove and the main guide groove is 30° to 60°, and a vertical guide side wall is arranged at the lower part of the auxiliary guide groove.

3. The mold for automatic demolding of the annular plastic part according to claim 1, wherein: A support bottom for carrying the rotating shaft is arranged at the bottom of the main guide groove, and a lower opening is arranged at the bottom end of the auxiliary guide groove.

4. The mold for automatic demolding of the annular plastic part according to claim 1, characterized in that: A bolt hole is formed on the movable frame, and the movable bolt is installed in the bolt hole.

5. The mold for automatic demolding of the annular plastic part according to claim 1, characterized in that: It also includes an upper template, and an injection port is arranged on the upper template. The injection port is arranged in cooperation with the mold core.

6. The mold for automatic demolding of the annular plastic part according to claim 1, wherein: There are multiple mold cores, which are arranged at intervals along the length direction of the rotating rod.

7. A vulcanization device for automatic demolding of a ring-shaped plastic part, characterized in that, Install the mold according to any one of claims 1 to 6.

8. A method for automatic demolding of an annular plastic part, characterized in that, Use the mold according to any one of claims 1 to 6, including the following steps: S1. Place the strip and the lifting frame on the vulcanization equipment. The lifting frame is connected to the external ejection mechanism of the vulcanization equipment, and start the vulcanization equipment to vulcanize and form the ring-shaped plastic part; the external ejection mechanism can drive the lifting frame to rise or fall; S2. After the ring-shaped plastic part is vulcanized and formed, the external ejection mechanism drives the lifting frame to rise to sequentially realize the first action and the second action. The first action is: the pulley rolls downward along the auxiliary guide groove, and the auxiliary rod is separated from the rotating rod; the second action is: the rotating rod rises to drive the male mold on the rotating rod and the ring-shaped plastic part connected to the male mold to rise.

9. The method for automatic demolding of the annular plastic part according to claim 8, wherein After the step S2, the following steps are also included: S3. Open the movable frame and remove the ring-shaped plastic part from the male mold on one side of the rotating rod; S4. Rotate the rotating rod and remove the ring-shaped plastic part from the male mold on the other side of the rotating rod.

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