Die with rotary sliding block

Abstract

The utility model discloses a mould with a rotary sliding block, which comprises a fixed mould part and a movable mould part, the fixed mould part comprises a fixed mould taking and attaching plate, a runner stripper plate and a fixed mould plate are sequentially arranged below the fixed mould taking and attaching plate, and the movable mould part comprises a movable mould taking and attaching plate. An ejector rod bottom plate, an ejector rod plate, square iron, a movable mold bottom plate and a movable mold plate are sequentially arranged above the movable mold taking and attaching plate, a fixed mold core is arranged in the fixed mold plate, a movable mold core is arranged in the movable mold plate, and in the mold closing state, the fixed mold core and the movable mold core jointly define a mold cavity; the mold is characterized in that a sliding block upper plate is fixedly connected in the fixed mold core, a sliding block seat matched with the sliding block upper plate is movably connected in the movable mold core, a lower arc-shaped groove is formed in the top end face of the sliding block seat, an upper arc-shaped groove matched with the lower arc-shaped groove is formed in the bottom end face of the sliding block upper plate, and in the mold closing state, the lower arc-shaped groove is matched with the upper arc-shaped groove. The upper arc-shaped groove and the lower arc-shaped groove are jointly spliced to form a complete arc-shaped groove, and a guide steel ball is arranged in the arc-shaped groove.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, in particular to a mold with a rotating slider. Background Art

[0002] Injection molding is a low-cost mass production process for plastic products. Injection molds are required during the injection molding process. After the molds are closed, the molding machine injects molten material into the mold cavity. After the material cools, it forms a product that matches the shape of the cavity.

[0003] Since the injection molding process has the advantages of low cost and mass production, many plastic products are made by injection molding. With the continuous advancement and improvement of the injection molding process, some products with relatively complex structures can also be made by injection molding. For example, there is a type of workpiece with a protrusion at the edge and a section of bevel teeth on the outside of the protrusion. Traditionally, the injection molding process is generally used to process a workpiece without a toothed portion, and then the bevel teeth are processed on the protrusion in subsequent processes. This method requires two processes, which is time-consuming and labor-intensive, and the cost is relatively high.

[0004] In order to solve the above problems, some manufacturers are now improving the mold in order to complete the preparation of the workpiece with the bevel tooth part in one injection molding step. However, the bevel tooth part is essentially an undercut structure, which is difficult to smoothly realize during demolding. In order to ensure successful demolding, traditional molds often sacrifice part of the workpiece's precision requirements. This results in the dimensional accuracy of the bevel tooth part of the produced workpiece often not meeting the requirements, the defective rate is relatively high, and the quality is difficult to guarantee.

[0005] Therefore, a method or device capable of solving the above problems is now needed. Summary of the invention

[0006] The utility model aims to solve the above-mentioned deficiencies in the prior art and proposes a mold with a rotating slider which has a simple structure, ingenious design, reasonable layout, can complete the preparation of a workpiece with a helical tooth part at one time, and can also ensure product quality.

[0007] The technical solution of the utility model is: a mold with a rotating slider, including a fixed mold part and a movable mold part, the fixed mold part includes a fixed mold taking plate 1, and a runner stripping plate 2 and a fixed mold plate 3 are sequentially arranged below the fixed mold taking plate 1, the movable mold part includes a movable mold taking plate 4, and a push rod bottom plate 5, a push rod plate 6, a square iron 7, a movable mold bottom plate 8 and a movable mold plate 9 are sequentially arranged above the movable mold taking plate 4, a fixed mold core 10 is arranged in the fixed mold plate 3, and a movable mold core 11 is arranged in the movable mold plate 9. In the mold closing state, the fixed mold core 10 and the movable mold core 11 are enclosed together to form a cavity, characterized in that:

[0008] The fixed model core 10 is fixedly connected with a slider upper plate 12, and the movable model core 11 is movably connected with a slider seat 13 matching the slider upper plate 12. A lower arc groove 14 is arranged on the top surface of the slider seat 13, and an upper arc groove 15 matching the lower arc groove 14 is arranged on the bottom surface of the slider upper plate 12. In the mold closing state, the upper arc groove 15 and the lower arc groove 14 are combined to form a complete arc groove, and a guide steel ball 16 is arranged in the arc groove.

[0009] The inner end of the slider seat 13 is provided with an insert part 17, and the insert part 17 is composed of a plurality of inserts 18, and the end of the insert 18 is a tooth-shaped part, and the tooth-shaped parts on the plurality of inserts 18 together form a helical tooth forming part.

[0010] The outer end of the slider seat 13 is provided with a driving inclined surface, and the fixed template 3 is provided with a locking block 20, and the locking block 20 is provided with a locking inclined surface matching the driving inclined surface.

[0011] A pair of reset pins 21 are also provided in the fixed mold plate 3, and the bottom ends of the reset pins 21 are driving spherical surfaces 22. The reset pins 21 are movably connected in pin holes provided on the slider upper plate 12, the slider seat 13 and the moving model core 11, and a slider seat driving inclined surface 23 matching the driving spherical surface 22 is also provided on the slider seat 13.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] The mold with a rotating slider of this structural form has a simple structure, ingenious design and reasonable layout. It designs a special structure to solve the problems existing in the traditional mold when preparing a workpiece with a protruding oblique tooth part. First, it splits a complete oblique tooth forming insert in the traditional structure into several small inserts, each small insert only corresponds to two to three tooth-shaped parts, and all the small inserts are fixedly connected to the same slider seat to form an oblique tooth forming part. This structure can effectively ensure the molding accuracy. At the same time, the difficulty of making small inserts is much lower than that of a large insert with multiple tooth-shaped parts, which can effectively reduce the overall cost of the mold; at the same time, it uses the matching reset pins with ball head driving parts and the driving inclined surfaces matched therewith to realize the swinging action of the slider seat. When the mold is closed, the slider seat can be swung to the required angle under the action of the reset pin, and the reset pin can lock it to prevent it from swinging under the action of high-pressure materials. When the mold is opened, after the reset pin is withdrawn, the slider seat (and all the small inserts thereon) restores the degree of freedom, and will make adaptive actions along the trajectory of the oblique tooth part on the formed workpiece, so that the workpiece can be demolded smoothly. This mold structure does not require the setting of complex gear racks and other mechanisms to achieve the preparation and smooth demoulding of workpieces with helical teeth. At the same time, its manufacturing process is simple and the manufacturing cost is low. Therefore, it can be said that it has many advantages and is particularly suitable for promotion and application in this field. Its market prospects are very broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an embodiment of the utility model (main viewing direction).

[0015] Figure 2 It is a schematic structural diagram of an embodiment of the utility model (viewed from above).

[0016] Figure 3 It is a structural schematic diagram of the cavity part in the embodiment of the utility model (main viewing direction).

[0017] Figure 4 It is a schematic structural diagram of the cavity portion in an embodiment of the utility model (side view).

[0018] Figure 5 It is a schematic structural diagram of the cavity portion in an embodiment of the utility model (viewed from above). DETAILED DESCRIPTION

[0019] The specific implementation of the present utility model will be described below in conjunction with the accompanying drawings. Figures 1 to 5As shown: a mold with a rotating slider, including a fixed mold part and a movable mold part, the fixed mold part includes a fixed mold taking plate 1, below which are arranged a runner stripper plate 2 and a fixed mold plate 3, the movable mold part includes a movable mold taking plate 4, above which are arranged a push rod bottom plate 5, a push rod plate 6, a square iron 7, a movable mold bottom plate 8 and a movable mold plate 9, a fixed mold core 10 is arranged in the fixed mold plate 3, and a movable mold core 11 is arranged in the movable mold plate 9, in the mold closing state, the fixed mold core 10 and the movable mold core 11 are enclosed together to form a cavity, characterized in that:

[0020] The fixed model core 10 is fixedly connected with a slider upper plate 12, and the movable model core 11 is movably connected with a slider seat 13 matching the slider upper plate 12. A lower arc groove 14 is arranged on the top surface of the slider seat 13, and an upper arc groove 15 matching the lower arc groove 14 is arranged on the bottom surface of the slider upper plate 12. In the mold closing state, the upper arc groove 15 and the lower arc groove 14 are combined to form a complete arc groove, and a guide steel ball 16 is arranged in the arc groove.

[0021] The inner end of the slider seat 13 is provided with an insert part 17, and the insert part 17 is composed of a plurality of inserts 18, and the end of the insert 18 is a tooth-shaped part, and the tooth-shaped parts on the plurality of inserts 18 together form a helical tooth forming part.

[0022] The outer end of the slider seat 13 is provided with a driving inclined surface, and the fixed template 3 is provided with a locking block 20, and the locking block 20 is provided with a locking inclined surface matching the driving inclined surface.

[0023] A pair of reset pins 21 are also provided in the fixed mold plate 3, and the bottom ends of the reset pins 21 are driving spherical surfaces 22. The reset pins 21 are movably connected in pin holes provided on the slider upper plate 12, the slider seat 13 and the moving model core 11, and a slider seat driving inclined surface 23 matching the driving spherical surface 22 is also provided on the slider seat 13.

[0024] The working process of the mold with a rotating slider in the embodiment of the utility model is as follows: when the mold is closed, the fixed mold core 10 and the movable mold core 11 are together to form a cavity, and at this time, the toothed parts on the multiple inserts 18 are also located in the cavity and form a part of the cavity.

[0025] The molding machine injects molten material into the cavity, and the material is cooled to form a workpiece, and the workpiece forms a helical tooth portion at the part matching the tooth-shaped portion;

[0026] Open the mold, first open the runner stripper plate 2 and the fixed mold plate 3, and disconnect the runner from the workpiece 24;

[0027] Continue to open the mold, the fixed mold taking plate 1 and the runner stripping plate 2 are separated, the material handle falls from the runner stripping plate 2, and the robot takes out the material handle;

[0028] As the mold opening action continues, the fixed mold plate 3 and the movable mold plate 9 are separated, and the reset pin 21 and the locking block 20 are separated from the slider seat 13. At this time, the slider seat 13 regains its freedom and can move in the movable mold core. However, because the lower arc groove 14 opened on its upper end surface and the upper arc groove 15 opened on the slider upper plate 12 are combined to form an arc groove, and a guide steel ball 16 is arranged in this arc groove, the movement trajectory of the slider seat 13 is restricted by the arc groove.

[0029] The central axis of the arc groove is an arc line, the center of which coincides with the center of the perfect circular part of the workpiece 24. This design can ensure that the motion trajectory of the slider seat 13 is a reciprocating swing with the center of the perfect circular part of the workpiece 24 as the axis.

[0030] After the mold is opened, the molding machine drives the ejector bottom plate 5 and the ejector plate 6 to eject, and the ejector pushes the workpiece 24 upward, and the workpiece 24 moves upward. During the movement of the workpiece 24, the multiple inserts 18 in contact with it will rotate under the drive of the workpiece 24 to adapt to the movement of the workpiece 24. In the above process, the workpiece 24 only performs an ejection action (no rotation), and the slider seat 13 connected with multiple inserts 18 only performs a swinging action (no displacement in the ejection direction), and finally realizes the separation action between the helical tooth portion on the workpiece 24 and all the inserts 18;

[0031] After being ejected to the set position, the workpiece 24 is completely ejected from the cavity, and the slider seat 13 also slides to the preset angle position, waiting for the next mold closing operation;

[0032] When the mold is closed, the above-mentioned action is performed in reverse. At this time, the slider seat 13 has been rotated to the mold opening angle under the action of the workpiece 24, and the slider seat driving inclined surface 23 thereon has moved to a position interfering with the movement trajectory of the reset pin 21. Therefore, when the mold is closed, the reset pin 21 moves downward, and the driving spherical surface 22 at its bottom will press on the slider seat driving inclined surface 23 and push the slider seat 13 to swing in the opposite direction. After the mold is completely closed, the reset pin 21 is completely inserted into the dynamic model core 11. At this time, the slider seat 13 returns to the initial position, and the locking block 20 and the two reset pins 21 lock the slider seat 13 again. The mold is ready for injection molding again and can be used for the next injection molding operation.

Claims

1. A mold with a rotating slider, comprising a fixed mold part and a movable mold part, the fixed mold part comprising a fixed mold taking-up plate (1), below which a runner stripper plate (2) and a fixed mold plate (3) are sequentially arranged, the movable mold part comprising a movable mold taking-up plate (4), above which a push rod bottom plate (5), a push rod plate (6), a square iron (7), a movable mold bottom plate (8) and a movable mold plate (9) are sequentially arranged, the fixed mold plate (3) having a fixed mold core (10) arranged therein, the movable mold plate (9) having a movable mold core (11) arranged therein, and in a mold closing state, the fixed mold core (10) and the movable mold core (11) together enclose a mold cavity, characterized in that: The fixed mold core (10) is fixedly connected with a slider upper plate (12), and the movable mold core (11) is movably connected with a slider seat (13) matching the slider upper plate (12). A lower arc groove (14) is arranged on the top end surface of the slider seat (13), and an upper arc groove (15) matching the lower arc groove (14) is arranged on the bottom end surface of the slider upper plate (12). In the mold closing state, the upper arc groove (15) and the lower arc groove (14) are combined to form a complete arc groove, and a guide steel ball (16) is arranged in the arc groove. An insert part (17) is provided at the inner end of the slider seat (13), the insert part (17) is composed of a plurality of inserts (18), the end of the insert (18) is a tooth-shaped part, and the tooth-shaped parts on the plurality of inserts (18) together form a helical tooth forming part. The outer end of the slider seat (13) is provided with a driving inclined surface, the fixed template (3) is provided with a locking block (20), and the locking block (20) is provided with a locking inclined surface matching the driving inclined surface. A pair of reset pins (21) are also provided in the fixed mold plate (3), the bottom ends of the reset pins (21) are driving spherical surfaces (22), the reset pins (21) are movably connected to pin holes provided on the slider upper plate (12), the slider seat (13) and the moving mold core (11), and a slider seat driving inclined surface (23) matching the driving spherical surface (22) is also provided on the slider seat (13).

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