A clamping mechanism for plastic injection molding machine for eliminating extrusion vibration

Abstract

The utility model relates to the technical field of injection molding machine molds, and specifically discloses a locking mechanism for a plastic product injection molding machine that eliminates extrusion vibration, comprising a top plate, a bottom plate, an upper mold and a lower mold, wherein the upper mold and the lower mold are arranged between the top plate and the bottom plate, and locking mechanisms are installed at the four corners of the top plate, and guide columns are installed at the four corners of the bottom plate, and locking sleeves that match the locking mechanism are arranged on the guide columns. The utility model improves the locking mechanism in the injection molding machine mold, and uses a sliding sleeve and a positioning rod that are slidably arranged to achieve locking of the upper and lower molds, and after locking, uses a buffer spring to absorb the vibration generated when the upper mold and the lower mold are squeezed and collided, so as to avoid the vibration affecting the mold closing position of the upper mold and the lower mold and avoid damage to the injection molding mechanism, thereby improving the injection molding accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machine molds, in particular to a mold locking mechanism for a plastic product injection molding machine capable of eliminating extrusion vibration. Background Art

[0002] Injection molding is a processing method used in mass production of certain parts with complex shapes. The specific principle is: the heated and melted plastic raw material is pushed by the injection molding machine screw and injected into the mold cavity of the plastic mold under high pressure. After cooling and solidification, the plastic molded product is obtained. The plastic mold consists of an upper mold and a lower mold. The upper mold is installed on the upper mold plate of the injection molding machine, and the lower mold is installed on the fixed lower mold plate of the injection molding machine. During injection molding, the upper mold and the lower mold are closed to form a pouring system and a cavity. When the mold is opened, the upper mold and the lower mold are separated to remove the plastic product.

[0003] Plastic molds need to use a clamping mechanism to prevent the upper and lower molds from relative displacement. The existing clamping mechanism of the plastic blister mold usually uses an oil cylinder to drive the clamping part to move, fix the upper and lower molds, so that the upper and lower molds will not be relatively displaced during the workpiece molding process to ensure the processing accuracy of the workpiece; however, when the existing clamping mechanism is working, the clamping cylinder drives the clamping part to move, which will cause a certain impact on the upper and lower molds, affecting the molding quality of the workpiece. Utility Model Content

[0004] The utility model aims to provide a clamping mechanism for a plastic product injection molding machine which can eliminate extrusion vibration, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a locking mechanism of a plastic product injection molding machine for eliminating extrusion vibration, comprising a top plate, a bottom plate, an upper mold and a lower mold, the upper mold and the lower mold are arranged between the top plate and the bottom plate, a locking mechanism is installed at the four corners of the top plate, and a guide column is installed at the four corners of the bottom plate, and a locking sleeve matching the locking mechanism is arranged on the guide column; the locking mechanism comprises a mounting seat detachably mounted on the top plate and a sliding sleeve slidably mounted inside the mounting seat, a mounting groove is provided inside the mounting seat, and the sliding sleeve is slidably mounted inside the mounting groove; a convex edge is provided on the inner wall of the mounting groove, the lower side of the sliding sleeve is connected to the convex edge by a buffer spring, and the guide column is slidably connected to the sliding sleeve; at least one positioning hole is provided on the upper part of the sliding sleeve, and a positioning rod matching the positioning hole is installed on the mounting seat, and the positioning rod is a telescopic structure.

[0006] As a further solution of the utility model: the sliding sleeve includes a sleeve body, a positioning end arranged at one end of the sleeve body and a connecting end arranged at the other end of the sleeve body, the positioning end, the connecting end and the mounting groove have the same diameter, and the diameter of the sleeve body is smaller than the diameter of the mounting groove.

[0007] As a further solution of the utility model: the positioning hole is opened on the positioning end, and the connecting end is connected to the convex edge through the buffer spring.

[0008] As a further solution of the utility model: a plurality of mounting holes are provided on the guide column, and the lower part of the locking sleeve is mounted in the mounting holes by fixing bolts.

[0009] As a further solution of the utility model: a connecting seat is fixedly installed on the bottom of the top plate, the upper mold is arranged below the connecting seat, the peripheral side of the upper mold is slidably connected with the connecting seat and the top plate through a guide rod, and a return spring is sleeved on the guide rod; an injection molding head is arranged on the top plate, a feed port is provided at one end of the injection molding head, a discharge port is provided at the other end of the injection molding head, the discharge port of the injection molding head extends downward from the connecting seat, and an opening for the injection molding head to pass through is provided on the upper mold.

[0010] As a further solution of the utility model: the lower mold is fixedly installed on the bottom plate, and a mold forming groove is provided on one side of the lower mold facing the upper mold.

[0011] As a further solution of the utility model: an ejector mechanism is also arranged on the bottom plate below the lower die.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model improves the locking mechanism in the mold of the injection molding machine, utilizes a sliding sleeve and a positioning rod that are slidably arranged to achieve locking of the upper and lower molds, and utilizes a buffer spring to absorb the vibration generated by the extrusion and collision between the upper mold and the lower mold after locking, thereby avoiding the vibration from affecting the clamping position of the upper mold and the lower mold and avoiding damage to the injection molding mechanism, thereby improving the injection molding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the structure of the clamping mechanism of a plastic injection molding machine for eliminating extrusion vibration;

[0014] Figure 2 Schematic diagram of the structure of the clamping mechanism of the plastic injection molding machine to eliminate extrusion vibration Figure 2 , Figure 2 In the figure, a corner of the locking mechanism is cut off to clearly show the internal structure of the locking mechanism;

[0015] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0016] Figure 4 for Figure 1 A front view of

[0017] Figure 5 for Figure 4 A partial enlarged schematic diagram of point B in the middle;

[0018] Figure 6 A schematic diagram of the structure of a sliding sleeve in the clamping mechanism of a plastic product injection molding machine for eliminating extrusion vibration.

[0019] In the figure: 10-top plate, 11-connecting seat, 12-guide rod, 20-upper mold, 30-lower mold, 40-guide column, 41-locking sleeve, 50-locking mechanism, 51-mounting seat, 52-convex edge, 53-sliding sleeve, 531-positioning end, 532-connecting end, 533-positioning hole, 54-buffer spring, 55-positioning rod, 60-injection head, 70-throw pin mechanism. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 6 In an embodiment of the utility model, a locking mechanism of a plastic product injection molding machine for eliminating extrusion vibration includes a top plate 10, a bottom plate, an upper mold 20 and a lower mold 30, wherein the upper mold 20 and the lower mold 30 are arranged between the top plate 10 and the bottom plate, and locking mechanisms 50 are installed at the four corners of the top plate 10, and guide columns 40 are installed at the four corners of the bottom plate, and locking sleeves 41 matched with the locking mechanisms 50 are arranged on the guide columns 40. When the mold is closed, the top plate 10 moves toward the bottom plate, and the mold closing is completed when the upper mold 20 and the lower mold 30 are tightly attached. At this time, the locking sleeve 41 and the locking mechanism 50 cooperate to lock the closing position of the upper mold 20 and the lower mold 30 to prevent the upper mold 20 and the lower mold 30 from separating during the injection molding process.

[0022] In the embodiment of the present application, the locking mechanism 50 includes a mounting seat 51 detachably mounted on the top plate 10 and a sliding sleeve 53 slidably mounted inside the mounting seat 51. A mounting groove is provided inside the mounting seat 51, and the sliding sleeve 53 is slidably mounted inside the mounting groove. A convex edge 52 is provided on the inner wall of the mounting groove, and the lower side of the sliding sleeve 53 is connected to the convex edge 52 through a buffer spring 54, and the guide column 40 is slidably connected to the sliding sleeve 53. At least one A positioning hole 533 is installed on the mounting seat 51, and a positioning rod 55 matching the positioning hole 533 is installed. The positioning rod 55 is a telescopic structure. When the mold is closed, the top plate 10 moves toward the bottom plate, so that the locking sleeve 41 on the guide column 40 moves toward the sliding sleeve 53. When the locking sleeve 41 contacts the sliding sleeve 53, the locking sleeve 41 squeezes the sliding sleeve 53 and continues to move, so that the buffer spring 54 contracts. At this time, the sliding sleeve 53 rises, and the positioning hole 533 and the positioning rod 55 are at the same height. The telescopic end of the positioning rod 55 is extended and inserted into the positioning hole 533. 33, the position locking of the upper mold 20 and the lower mold 30 is realized. It can be understood that during the mold closing process, the vibration generated when the upper mold 20 and the lower mold 30 are in contact is transmitted to the buffer spring 54, and the buffer spring 54 absorbs the vibration to prevent the vibration from affecting the mold closing position of the upper mold 20 and the lower mold 30 and avoid damaging the injection molding mechanism, thereby improving the injection molding accuracy; further, in the embodiment of the present application, the sliding sleeve 53 includes a sleeve body, a positioning end 531 arranged at one end of the sleeve body, and a connecting end 531 arranged at the other end of the sleeve body. 32, the diameters of the positioning end 531, the connecting end 532 and the mounting groove are the same, and the diameter of the sleeve body is smaller than the diameter of the mounting groove; the positioning hole 533 is opened on the positioning end 531, and the connecting end 532 is connected to the convex edge 52 through the buffer spring 54; in this embodiment, the positioning rod 55 adopts an electrically driven telescopic rod structure. After the mold is closed, the telescopic end of the positioning rod 55 is manually controlled to extend so that the telescopic end of the positioning rod 55 enters the positioning hole 533. After the injection molding is completed, the telescopic end of the positioning rod 55 is controlled to shorten.

[0023] In addition, it should be noted that a plurality of mounting holes are provided on the guide column 40, and the lower portion of the locking sleeve 41 is mounted in the mounting holes by fixing bolts. It can be understood that the locking sleeve 41 can be installed in mounting holes of different heights according to the adjustment of the descending height of the upper mold 20.

[0024] In the embodiment of the present application, a connecting seat 11 is fixedly installed at the bottom of the top plate 10, and the upper mold 20 is arranged below the connecting seat 11. The peripheral side of the upper mold 20 is slidably connected with the connecting seat 11 and the top plate 10 through a guide rod 12, and a return spring is sleeved on the guide rod 12; an injection head 60 is arranged on the top plate 10, and a feed port is provided at one end of the injection head 60, and a discharge port is provided at the other end of the injection head 60, and the discharge port of the injection head 60 extends downwardly out of the connecting seat 11, and an opening is provided on the upper mold 20 for the injection head 60 to pass through, and the feed port of the injection head 60 is used to connect the feeding mechanism of the injection molding machine, so that the injection plastic flows from the feeding mechanism of the injection molding machine into the feed port of the injection head 60; the lower mold 30 is fixedly installed on the bottom plate, and the lower mold 30 faces A mold forming groove is opened on one side of the upper mold 20. When the mold is closed, the top plate 10 drives the upper mold 20 to move toward the lower mold 30. When the upper mold 20 contacts, the top plate 10 continues to move. At this time, the return spring contracts, and the discharge port of the injection head 60 enters the interior of the opening. When the top plate 10 moves to the maximum position, the discharge port of the injection head 60 is at the same height as the bottom of the opening. At this time, the upper mold 20 is tightly attached to the lower mold 30, and the injected plastic flows into the mold forming groove from the discharge port of the injection head 60; further, in the embodiment of the present application, a pin mechanism 70 is also provided on the bottom plate below the lower mold 30. The pin mechanism 70 is used to push the molded plastic product to make the plastic product leave the mold forming groove. The pin mechanism 70 is a prior art and will not be described in detail in this embodiment.

[0025] It is obvious 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 present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A clamping mechanism for a plastic injection molding machine for eliminating extrusion vibration, characterized in that: The invention comprises a top plate (10), a bottom plate, an upper die (20) and a lower die (30), wherein the upper die (20) and the lower die (30) are arranged between the top plate (10) and the bottom plate, locking mechanisms (50) are installed at the four corners of the top plate (10), guide columns (40) are installed at the four corners of the bottom plate, and locking sleeves (41) matched with the locking mechanisms (50) are arranged on the guide columns (40); the locking mechanisms (50) comprise a mounting seat (51) detachably mounted on the top plate (10) and a sliding sleeve (53) slidably mounted inside the mounting seat (51). The mounting seat (51) has a mounting groove formed inside, and the sliding sleeve (53) is slidably mounted inside the mounting groove; a convex edge (52) is provided on the inner wall of the mounting groove, the lower side of the sliding sleeve (53) is connected to the convex edge (52) via a buffer spring (54), and the guide column (40) is slidably connected to the sliding sleeve (53); at least one positioning hole (533) is formed on the upper part of the sliding sleeve (53), and a positioning rod (55) matched with the positioning hole (533) is installed on the mounting seat (51), and the positioning rod (55) is a telescopic structure.

2. The mold clamping mechanism for plastic injection molding machine for eliminating extrusion vibration according to claim 1 is characterized in that: The sliding sleeve (53) comprises a sleeve body, a positioning end (531) arranged at one end of the sleeve body, and a connecting end (532) arranged at the other end of the sleeve body, wherein the positioning end (531), the connecting end (532) and the mounting groove have the same diameter, and the diameter of the sleeve body is smaller than the diameter of the mounting groove.

3. The mold clamping mechanism for plastic injection molding machine for eliminating extrusion vibration according to claim 2 is characterized in that: The positioning hole (533) is formed on the positioning end (531), and the connecting end (532) is connected to the protruding edge (52) via the buffer spring (54).

4. The mold clamping mechanism for plastic injection molding machine for eliminating extrusion vibration according to claim 1, characterized in that: The guide column (40) is provided with a plurality of mounting holes, and the lower portion of the mold locking sleeve (41) is mounted in the mounting holes via fixing bolts.

5. The mold clamping mechanism for plastic injection molding machine for eliminating extrusion vibration according to claim 1, characterized in that: A connecting seat (11) is fixedly mounted on the bottom of the top plate (10); the upper mold (20) is arranged below the connecting seat (11); the circumferential side of the upper mold (20) is slidably connected to the connecting seat (11) and the top plate (10) via a guide rod (12); a return spring is sleeved on the guide rod (12); an injection head (60) is arranged on the top plate (10); a feed port is provided at one end of the injection head (60); a discharge port is provided at the other end of the injection head (60); the discharge port of the injection head (60) extends downwardly out of the connecting seat (11); and an opening is provided on the upper mold (20) for the injection head (60) to pass through.

6. The mold clamping mechanism for plastic injection molding machine for eliminating extrusion vibration according to claim 5, characterized in that: The lower die (30) is fixedly mounted on the bottom plate, and a die forming groove is provided on a side of the lower die (30) facing the upper die (20).

7. The mold clamping mechanism for plastic injection molding machine for eliminating extrusion vibration according to claim 5, characterized in that: An ejector mechanism (70) is also provided on the bottom plate below the lower die (30).

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