A plastic injection mold

Abstract

The present invention relates to the technical field of plastic parts, and discloses an injection plastic mold, including a fixed rod, a moving rod disposed on one side of the fixed rod, a fixed mold fixedly connected to the outside of the fixed rod, a moving mold fixedly connected to the outside of the moving rod, and an extrusion bar located at one end of an outer separator, thereby directly improving the yield rate of the product, and utilizing the inner and outer separation of the inner and outer separators to achieve effective and rapid demoulding, and the number of the fixed rods and the moving rods is four conventionally set. The outer separator is controlled to approach the plastic part outside the inner mold by the extrusion bar, and the limiter limits the transmission part, and the outer separator is rotated by the transmission part, and the inertia generated by the fit between the outer separator and the plastic part is utilized to evenly transmit the rotational force on the surface of the plastic part, thereby ensuring that the plastic part maintains structural integrity during demoulding, thereby improving the qualified rate of the product, reducing material waste caused by product damage, and reducing production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic parts, and in particular to an injection plastic mold. Background Art

[0002] Plastic mold is the abbreviation of a combined mold used for compression molding, extrusion molding, injection molding, blow molding and low-foaming molding. The coordinated changes of the mold convex and concave molds and the auxiliary molding system can process a series of plastic parts of different shapes and sizes.

[0003] However, in the prior art, after the plastic parts are shaped, adhesion often occurs between the product and the fixed mold. This adhesion is due to the strong bonding force formed after the plastic contacts the mold surface under high temperature and high pressure and cools down. At present, in order to separate the shaped plastic parts from the mold, a push rod is usually installed on the fixed mold to push the product out by mechanical force. However, the contact area between the push rod and the plastic part is set to be relatively small, which directly leads to uneven pressure distribution between the push rod and the plastic part. When the bonding force between the plastic part and the fixed mold is too large, this smaller contact area makes the local pressure of the ejector pin on the plastic part become abnormally concentrated. Due to the concentrated pressure, the plastic part is prone to deformation during the demolding process, especially for those thin-walled or complex-structured parts. This deformation may cause the product to be scrapped and seriously affect the product quality. Secondly, the local effect of high pressure may also cause surface damage to the plastic part, such as affecting not only the appearance of the product, but also the functionality and service life of the product. At the same time, long-term high pressure may also accelerate the wear of the ejector pin, thereby reducing the overall production efficiency. For adhesion and demolding problems, the production line operator sometimes needs to manually assist in demolding, which is not only inefficient, but also poses a safety hazard. At present, external grippers and the number of ejector pins will be increased, but increasing the number of ejector pins cannot effectively ensure that the plastic parts are evenly stressed. At the same time, the external hook will increase the complexity and cost of the mold, the operation is complicated, and maintenance work is required, and the production applicability is poor.

[0004] To this end, an injection plastic mold is proposed, which enables plastic parts to be effectively and quickly separated. Summary of the invention

[0005] The object of the present invention is to provide an injection plastic mold to solve the problem that plastic parts are difficult to separate.

[0006] The technical solution of the present invention is as follows: an injection mold for plastics comprises a fixed rod, a moving rod arranged on one side of the fixed rod, a fixed mold fixedly connected to the outside of the fixed rod, a moving mold fixedly connected to the outside of the moving rod, two outer separation parts both located inside the moving mold, a limiting part slidably connected to the outside of the moving rod, a transmission part connected to the inside of the limiting part, an extrusion part slidably connected to the outside of the moving rod, an inner separation part arranged inside the moving mold, two extrusion strips slidably connected to the outside of the moving rod, a second spring connected between the extrusion part and the extrusion strip, and a limiting part arranged on one side of the limiting part. The movable mold is provided with a positioning sleeve, the side of the fixed mold close to the movable mold is the outer mold, the side of the movable mold close to the fixed mold is the inner mold, the inner mold is provided with two installation slots, the two installation slots are symmetrical about the central axis of the inner mold and are located at the upper and lower sides of the inner mold, the two outer separation parts are respectively located inside the corresponding installation slots, the extrusion strip is located at one end of the outer separation part, the transmission part is connected to the extrusion part, the transmission part is fitted with one side of the extrusion strip, the limiting part makes the outer separation part gradually approach the inner mold through the extrusion strip, and then the limiting part makes the outer separation part rotate through the transmission part.

[0007] Furthermore, the limiting member includes a limiting plate slidably connected to the outside of the moving rod, a ring fixedly connected to the middle of the limiting plate on one side, an inner column arranged inside the ring, and an arc plate fixedly connected to the other side of the ring, the inner column is located inside the transmission member, two arc plates are provided and are symmetrical about the central axis of the ring, and the arc plates are in contact with the transmission member.

[0008] Furthermore, the transmission member includes a connecting sleeve located inside the ring, two transmission rods fixedly connected to both sides of the connecting sleeve, two path grooves opened on the surface of the connecting sleeve, a rotating shaft rotatably connected to the inside of one end of the connecting sleeve, and a first spring connected between the rotating shaft and the extrusion member, the arc plate is fitted with the connecting sleeve, the two transmission rods are colinear and symmetrical about the central axis of the connecting sleeve, the transmission rod is located on one side of the outer separation member, and the arc plate does not contact the transmission rod.

[0009] Furthermore, the positions of the two path grooves are symmetrical about the central axis of the connecting sleeve, the two inner columns are respectively located inside the corresponding path grooves, the path groove is divided into a gentle slope section and a steep slope section, and the inclination directions of the two path grooves are opposite.

[0010] Furthermore, the external separation part includes a telescopic rod rotatably connected to the outside of the inner mold, a sleeve shell fixedly connected to the outside of one end of the telescopic rod, a torsion spring connected between the sleeve shell and the inner mold, a round rod fixedly connected to the outside of the other end of the telescopic rod, a return spring connected between the sleeve shell and the round rod, and a transmission block connected to one end of the round rod, and the round rod is in an initial position when it is not in contact with the extrusion strip.

[0011] Furthermore, the extrusion member includes a connecting plate slidably connected to the outside of the moving rod, a support shaft fixedly connected to the middle of the connecting plate, and arc-shaped grooves opened on both sides of the support shaft, the connecting sleeve is slidably connected to the outside of the support shaft, the first spring is connected between the connecting plate and the rotating shaft, the arc-shaped groove is the same size as one side of the arc-shaped plate, the arc-shaped groove is located between the arc-shaped plate and the inner separation member, and the second spring is connected between the connecting plate and the extrusion strip.

[0012] Furthermore, one side of the extrusion strip close to the telescopic rod is an inclined arc surface, and one end of the round rod close to the extrusion strip is an arc surface end.

[0013] Furthermore, the inner separation part includes a force-bearing plate located on one side of the inner mold, a return spring connected between the inner mold and the force-bearing plate, and a push rod connected to the return spring on the side close to the inner mold, and multiple return springs and push rods are provided.

[0014] Furthermore, the diameter of the limiting sleeve is greater than the diameter of the ring, and a circular groove is provided in the middle of the limiting sleeve, and the diameter of the circular groove is the same as that of the connecting sleeve.

[0015] Furthermore, when the round rod is located at the initial position, the transmission block is located outside the outer mold, and the length of the inclined arc surface is smaller than the distance from the transmission block to the inner mold.

[0016] Beneficial effects of the present invention:

[0017] 1. The outer separation piece is controlled by the extrusion strip to be close to the plastic piece outside the inner mold, and the limit piece limits the transmission piece, so that the outer separation piece is rotated by the transmission piece, and two rotational forces are generated by the two outer separation pieces, and the two rotational forces are dispersed to the outside of the plastic piece at the same time, avoiding the local high-pressure points generated inside during traditional ejection, significantly reducing the possibility of deformation or damage of the plastic piece during demolding, and utilizing the inertia generated by the fit between the outer separation piece and the plastic piece to evenly transmit the rotational force on the surface of the plastic piece, ensuring that the plastic piece maintains structural integrity during demolding, improving the product qualification rate, reducing material waste caused by product damage, and reducing production costs.

[0018] 2. By using the outer separation piece to quickly contact the surface of the plastic part and using inertia to drive the plastic part, a single rolling friction can be quickly formed on the surface of the plastic part. Compared with the push of a single inner separation piece, this greatly reduces the friction between the two. Due to the reduction in friction, the surface of the plastic part can be protected, so that the appearance quality and functionality of the plastic part can be better maintained. At the same time, the outer separation piece is used for a single inertial rotation separation, and then the inner separation piece is used for multi-stage separation. Therefore, when pushing the plastic part out of the inner mold, the original size and shape of the product can be better maintained, avoiding deformation caused by violent pushing and pulling, and reducing the defective rate in the production process.

[0019] 3. It can be achieved by moving the moving rod and blocking the limiting sleeve in a conventional way, without adding additional drive and control. It can be quickly integrated with the existing mold system, and there is no need to carry out large-scale transformation of the production line or add additional drive equipment, thereby realizing fast and low-cost technology upgrades. At the same time, the external separation parts and transmission parts can be directly combined with the existing fixed mold and placed inside the fixed mold, which reduces the transformation cost and implementation difficulty, allowing enterprises to quickly adapt to new production needs. This structure can make full use of the internal space of the fixed mold, and will not affect the product design and mold layout due to the addition of external drive devices, reducing production interruptions that may be caused by drive device failures, and improving the continuous operation capability and overall reliability of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a three-dimensional structure of the present invention from a first viewing angle;

[0021] Figure 2 It is a cross-sectional view of a local structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the extruded strip of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the transmission member of the present invention;

[0024] Figure 5 For the present invention Figure 2 The enlarged schematic diagram of point A in the middle;

[0025] Figure 6 It is a schematic diagram of the structure of the extrusion part of the present invention;

[0026] Figure 7 It is a state diagram when the round rod of the present invention is in the initial position;

[0027] Figure 8 For the present invention Figure 7 A magnified schematic diagram of point B in the middle.

[0028] In the figure:

[0029] 1. Fixed rod; 2. Moving rod; 3. Fixed mold; 31. External mold; 4. Moving mold; 41. Internal mold; 411. Mounting notch; 5. External separation piece; 51. Telescopic rod; 52. Sleeve; 53. Torsion spring; 54. Round rod; 541. Arc end; 55. Return spring; 56. Transmission block; 6. Limiting piece; 61. Limiting plate; 62. Ring; 63. Inner column; 64. Arc plate; 7. Transmission piece; 7 1. Connecting sleeve; 72. Transmission rod; 73. Path groove; 731. Gentle slope section; 732. Steep slope section; 74. Rotating shaft; 75. First spring; 8. Extrusion piece; 81. Connecting plate; 82. Support shaft; 83. Arc-shaped notch; 9. Inner separation piece; 91. Force plate; 92. Return spring; 93. Push rod; 10. Extrusion strip; 101. Oblique arc surface; 11. Second spring; 12. Limit sleeve; 121. Circular groove. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] Reference Figure 1-8, which is a first embodiment of the present invention, provides an injection plastic mold, including a fixed rod 1, and also includes a moving rod 2 placed on one side of the fixed rod 1, a fixed mold 3 fixedly connected to the outside of the fixed rod 1, a moving mold 4 fixedly connected to the outside of the moving rod 2, two external separation pieces 5 are provided and both are located inside the moving mold 4, a limiting piece 6 slidably connected to the outside of the moving rod 2, a transmission piece 7 connected to the inside of the limiting piece 6, an extrusion piece 8 slidably connected to the outside of the moving rod 2, an internal separation piece 9 arranged inside the moving mold 4, two extrusion strips 10 are provided and slidably connected to the outside of the moving rod 2, a second spring 11 connected between the extrusion piece 8 and the extrusion strip 10, and a limiting sleeve 12 placed on one side of the limiting piece 6, a side of the fixed mold 3 close to the moving mold 4 is an outer mold 31, a side of the moving mold 4 close to the fixed mold 3 is an inner mold 41, and the inner mold 41 is provided with two mounting notches 411, and the two mounting notches 411 are relative to the inner mold The center axis of the tool 41 is symmetrical and located on the upper and lower sides of the inner mold 41. The two outer separators 5 are respectively located inside the corresponding mounting slots 411. The extrusion strip 10 is located at one end of the outer separator 5. The transmission member 7 is connected to the extrusion member 8. The transmission member 7 is fitted with one side of the extrusion strip 10. The limit member 6 allows the outer separator 5 to gradually approach the inner mold 41 through the extrusion strip 10. Then the limit member 6 rotates the outer separator 5 through the transmission member 7. This multi-stage demolding method is used to improve the demolding accuracy, which is particularly important for plastic parts requiring high-precision dimensions, such as electronic components, precision instrument components, etc. The rotation of the outer separator 5 is used to reduce the physical impact on the plastic parts, thereby directly improving the product yield. At the same time, the residue on the outside of the inner mold 41 is reduced to ensure the long-term stability of the inner mold 41. The inner separator 9 and the outer separator 5 are separated inside and outside to achieve effective and rapid demolding. In addition, the number of fixed rods 1 and movable rods 2 is the conventional four.

[0032] Reference Figure 1-3 The limiting member 6 includes a limiting plate 61 slidably connected to the outside of the moving rod 2, a collar 62 fixedly connected to the middle of the limiting plate 61 on one side, an inner column 63 arranged inside the collar 62, and an arc plate 64 fixedly connected to the other side of the collar 62. The inner column 63 is located inside the transmission member 7, so that the inner column 63 limits the transmission member 7. At the same time, when the transmission member 7 moves, the inner column 63 is used to make the limiting plate 61 move synchronously. Two arc plates 64 are provided and are symmetrical about the central axis of the collar 62. The arc plates 64 are in contact with the transmission member 7.

[0033] Reference Figure 1-7The transmission member 7 includes a connecting sleeve 71 located inside the collar 62, two transmission rods 72 fixedly connected to both sides of the connecting sleeve 71, two path grooves 73 opened on the surface of the connecting sleeve 71, a rotating shaft 74 rotatably connected to the inside of one end of the connecting sleeve 71, and a first spring 75 connected between the rotating shaft 74 and the extrusion member 8. The arc plate 64 fits the connecting sleeve 71, and the two transmission rods 72 are colinear and symmetrical about the central axis of the connecting sleeve 71. The transmission rod 72 is located on one side of the outer separation member 5. , the arc plate 64 does not contact the transmission rod 72, the first spring 75 and the second spring 11 have low elastic coefficients and the same length, that is, the first spring 75 and the second spring 11 have the same structure, and as the outer separation member 5 moves, one end of the outer separation member 5 will pass over the extrusion strip 10, the first spring 75 and the second spring 11 will be compressed, one side of the transmission rod 72 will contact the outer separation member 5, the connecting sleeve 71 will be pushed by the extrusion member 8, and then the outer separation member 5 and the transmission rod 72 will move synchronously, and the connecting sleeve 7 1 is affected by the inner column 63 to rotate, and the transmission rod 72 will also rotate, and the transmission rod 72 will transmit the transmission to the outer separation piece 5, and the rotation fulcrums of the two are different, but because one end of the outer separation piece 5 will exceed the transmission rod 72, even if the contact point with the transmission rod 72 changes after the outer separation piece 5 rotates, the outer separation piece 5 cannot be separated from the control of the transmission rod 72, and then the outer separation piece 5 will rotate to drive the plastic part, and at the same time, the outer separation piece 5 will automatically rotate out of the range of the inner mold 41, and then the inner separation piece 9 can perform secondary separation. In addition, since the extrusion strip 10 is supported by the transmission rod 72, when the transmission rod 72 moves, the second spring 11 is compressed, and the second spring 11 is also squeezed by the extrusion piece 8, the extrusion strip 10 will always fit with the transmission rod 72, then when the second spring 11 and the first spring 75 are compressed to the limit, the transmission rod 72, the extrusion strip 10 and the outer separation piece 5 will move synchronously, and the rotation angle of the outer separation piece 5 will never leave the range of the transmission rod 72 and the extrusion strip 10.

[0034] Specifically, when the moving rod 2 moves back, since the first spring 75 and the second spring 11 are compressed, the extrusion strip 10 and the connecting sleeve 71 will be unable to move due to their rebound, and the outer separation piece 5 will directly move back with the moving rod 2, and the transmission rod 72 will always be located on the side of the outer separation piece 5, that is, the outer separation piece 5 can be regarded as vertical, and the transmission rod 72 is inclined on the side of the outer separation piece 5, so that when the two transmission rods 72 rotate, they can drive the outer separation piece 5 to rotate. At the same time, when the connecting sleeve 71 rotates, the rotating shaft 74 is expected to rotate and connect, and the first spring 75 is fixedly connected to the extrusion piece 8, so that the first spring 75 will not rotate with the connecting sleeve 71.

[0035] Reference Figure 2-5The positions of the two path grooves 73 are symmetrical about the central axis of the connecting sleeve 71. The two inner columns 63 are respectively located inside the corresponding path grooves 73. The path groove 73 is divided into a gentle slope section 731 and a steep slope section 732. The inclination directions of the two path grooves 73 are opposite. The interior of the path groove 73 is roughened, which requires a large force to move the connecting sleeve 71 when the inner column 63 is inside the path groove 73. The elastic coefficient of the first spring 75 is low, so that the extrusion member 8 will compress the first spring 75 first, and the connecting sleeve 71 will be blocked by the limiting sleeve 12 in a fixed state. At this time, the extrusion strip 10 cannot move either. Then the outer separation member 5 will move with the extrusion member 8, which will cause the outer separation member 5 to be affected by the extrusion strip 10 and approach the inner mold 41, so that the outer separation member 5 can contact the plastic part for a separation, thereby ensuring that the plastic part maintains structural integrity when demolding during the secondary separation.

[0036] Specifically, when the connecting sleeve 71 is blocked by the inner column 63, the connecting sleeve 71 will rotate along the path of the path groove 73. At this time, if the inclination directions of the two connecting sleeves 71 are symmetrical, the connecting sleeve 71 will be stuck, so that the inclination directions of the two path grooves 73 are opposite, thereby achieving a rotation effect. When the inner column 63 is located inside the steep slope section 732, the connecting sleeve 71 can drive the transmission rod 72 to rotate rapidly at a large angle, so that the rapid rotation of the outer separation piece 5 generates inertia for the plastic part, and separates the remaining inner mold 41. When the inner column 63 reaches the inside of the gentle slope section 731, the transmission rod 72 rotates slightly, which makes the outer separation piece 5 still controlled by the transmission rod 72, and the outer separation piece 5 will not affect the separation of the plastic parts. At the same time, it avoids the outer separation piece 5 from moving back, ensuring that it will not affect the separation process.

[0037] Reference Figure 2-6 The outer separation member 5 includes a telescopic rod 51 rotatably connected to the outside of the inner mold 41, a sleeve 52 fixedly connected to the outside of one end of the telescopic rod 51, a torsion spring 53 connected between the sleeve 52 and the inner mold 41, a round rod 54 fixedly connected to the outside of the other end of the telescopic rod 51, a return spring 55 connected between the sleeve 52 and the round rod 54, and a transmission block 56 connected to one end of the round rod 54. When the round rod 54 is not in contact with the extrusion strip 10, it is in the initial position. At this time, the extrusion strip 10 will not squeeze the round rod 54, and the positions of the two extrusion strips 10 and the round rod 54 also correspond one to one.

[0038] In addition, the shape of the transmission block 56 can be changed according to the different plastic parts. For example, if it is conical, the contact surface between the transmission block 56 and the plastic part is inclined to ensure that the transmission block 56 can fit the plastic part. At the same time, the transmission block 56 will not affect the plastic part, thereby ensuring the separation speed and production efficiency of the plastic parts.

[0039] Reference Figure 2-6The extrusion member 8 includes a connecting plate 81 slidably connected to the outside of the moving rod 2, a support shaft 82 fixedly connected to the middle of the connecting plate 81, and an arc-shaped notch 83 opened on both sides of the support shaft 82. The connecting sleeve 71 is slidably connected to the outside of the support shaft 82. The first spring 75 is connected between the connecting plate 81 and the rotating shaft 74. The first spring 75 is fixedly connected to the connecting plate 81, and the first spring 75 is located on the outside of the support shaft 82. The arc-shaped notch 83 is the same size as one side of the arc plate 64. The arc-shaped notch 83 is located between the arc plate 64 and the inner separation member 9, so that the arc plate 64 can pass through the arc-shaped notch 83, and the arc plate 64 can drive the inner separation member 9 to separate the plastic part from the inner mold 41 again. The second spring 11 is connected between the connecting plate 81 and the extrusion strip 10, so that the connecting plate 81 will drive the second spring 11 and the extrusion strip 10 to move when it moves. When the extrusion strip 10 is blocked, the connecting plate 81 will compress the second spring 11.

[0040] Reference Figure 1-8 The side of the extrusion bar 10 close to the telescopic rod 51 is an inclined arc surface 101, and the end of the round rod 54 close to the extrusion bar 10 is an arc surface end 541. The round rod 54 is extruded by the inclined arc surface 101 of the extrusion bar 10, and the arc surface end 541 of the round rod 54 can be better extruded by the inclined arc surface 101. When the round rod 54 is in the initial position, the transmission block 56 is located outside the outer mold 31, and the length of the inclined arc surface 101 is less than the distance from the transmission block 56 to the inner mold 41, so that the transmission block 56 does not affect the movement of the outer mold 31. When the inclined arc surface 101 of the extrusion bar 10 squeezes the round rod 54, the two transmission blocks 56 will be close to the plastic parts outside the outer mold 31. The plastic parts have thickness, and the length of the inclined arc surface 101 is less than the distance from the transmission block 56 to the inner mold 41, so as to avoid extrusion. In this way, the rotational inertia force is used to make the plastic parts rotated and pushed.

[0041] In addition, the length of the arc surface end 541 allows this end of the round rod 54 to completely enter the range of the extrusion bar 10 and the transmission rod 72 , so that the round rod 54 is always within the range of the extrusion bar 10 and the transmission rod 72 .

[0042] Reference Figure 1-8The inner separation member 9 includes a force plate 91 located on one side of the inner mold 41, a return spring 92 connected between the inner mold 41 and the force plate 91, and a push rod 93 connected to the return spring 92 near the side of the inner mold 41. There are multiple return springs 92 and push rods 93. Since the moving rod 2 will drive the force plate 91 to move, and the arc plate 64 will be blocked by the limiting sleeve 12 and stop moving, the limiting sleeve 12 will eventually pass through the arc groove 83 and contact the force plate 91, and the moving rod 2 continues to drive the force plate 91 to move. The force plate 91 will be pushed by the arc plate 64, so that multiple push rods 93 are used to push the plastic part. At this time, the plastic part has been separated by the rotation of the outer separation member 5, thereby reducing the deformation or damage of the plastic part during the demolding process, so that the rotational force is evenly transmitted on the surface of the plastic part.

[0043] Reference Figure 1-8 The limiting sleeve 12 is fixed on the installation equipment. When the moving rod 2 drives the internal components to move, the diameter of the limiting sleeve 12 is larger than the diameter of the ring 62, so that the limiting sleeve 12 blocks the limiting plate 61. In order to prevent the limiting sleeve 12 from affecting the movement of the connecting sleeve 71, a circular groove 121 is opened in the middle of the limiting sleeve 12. The circular groove 121 has the same diameter as the connecting sleeve 71. The limiting sleeve 12 does not require an external drive, eliminates the external drive device, reduces system complexity, reduces equipment investment and maintenance costs, and improves workshop space utilization.

[0044] In addition, the structure is not affected by external power fluctuations and environmental conditions, and can work stably in various production environments, improving production stability and product consistency.

[0045] The working principle of the present invention is as follows: when the injection molding cooling is completed, the moving rod 2 is driven externally to drive the moving mold 4 and the extrusion piece 8 to move synchronously, and the moving mold 4 and the extrusion piece 8 will move in the direction close to the limiting sleeve 12. At this time, the movement of the moving mold 4 will drive the outer separation piece 5 and the inner separation piece 9 to move synchronously as a whole, and the extrusion piece 8 is connected to the transmission piece 7, so that the transmission piece 7 moves synchronously with the extrusion piece 8, and the transmission piece 7 will drive the limiting piece 6 to move toward the limiting sleeve 12 with the moving mold 4. At the same time, the extrusion piece 8 uses the second spring 11 to make the extrusion strip 10 move with the moving mold 4, and always keep the extrusion strip 10 and the transmission piece 7 in contact, so that the moving mold 4 drives the outer separation piece 5, the limiting piece 6, the transmission piece 7, the extrusion piece 8, the inner separation piece 9, the extrusion strip 10 and the second spring 11 to move synchronously toward the position of the limiting sleeve 12 when moving;

[0046] Among them, when the connecting plate 81 moves with the moving rod 2, the connecting plate 81 will drive the supporting shaft 82 to move synchronously. At the same time, when the supporting shaft 82 moves, it will squeeze the first spring 75 and the second spring 11, so that the first spring 75 and the second spring 11 move, and the first spring 75 will move the rotating shaft 74, and the rotating shaft 74 makes the connecting sleeve 71 and the transmission rod 72 move synchronously, and the inner column 63 is located inside the path groove 73, so that when the connecting sleeve 71 moves, it will drive the inner column 63 to move, and the inner column 63 makes the limiting plate 61, the collar 62 and the arc plate 64 also move synchronously. With the continuous driving of the moving rod 2, one side of the limiting plate 61 will contact the limiting sleeve 12, and the limiting sleeve 12 is fixed on the external device and cannot The movement of the limit plate 61 stops after contacting the limit sleeve 12. When the limit plate 61 stops moving, the collar 62, the inner column 63 and the arc plate 64 also stop moving, and the connecting sleeve 71 is also restricted by the inner column 63 and stops moving. The stop of the connecting sleeve 71 causes the transmission rod 72 to stop moving, so that the extrusion bar 10 is blocked by the transmission rod 72 and cannot move. At this time, the moving rod 2 will continue to drive the outer separation member 5 as a whole and the connecting plate 81 to move, and the connecting plate 81 will compress the second spring 11 and the first spring 75, and the stationary round rod 54 of the extrusion bar 10 will approach the extrusion bar 10 with the moving rod 2, and the arc surface end 541 of the round rod 54 will gradually contact the extrusion bar 10. As the round rod 54 moves, the round rod 54 will be squeezed. The beveled arc surface 101 of the pressure strip 10 squeezes the round rod 54 to move to a position close to the inner mold 41. When the round rod 54 moves downward, the return spring 55 is compressed, and the transmission block 56 moves with the round rod 54, so that the transmission block 56 gradually approaches the inner mold 41. When there is a plastic part outside the inner mold 41, the transmission block 56 will contact the plastic part, and the round rod 54 will contact the transmission rod 72. As the first spring 75 is compressed, the first spring 75 and the connecting sleeve 71 will still be compressed by the connecting plate 81. The contact point between the connecting sleeve 71 and the inner column 63 is subject to the rebound force of the first spring 75 and the squeezing of the connecting plate 81, so that the connecting sleeve 71 will enter the inside of the circular groove 121, and when the connecting sleeve 71 moves, it will be restricted by the inner column 63, so that the connecting sleeve 71 The sleeve 71 drives the transmission rod 72 to rotate, and the rotation of the transmission rod 72 will drive the round rod 54 to rotate. The round rod 54 will rotate with the contact point between the telescopic rod 51 and the movable mold 4 as the fulcrum. At this time, the round rod 54 will rotate synchronously with the telescopic rod 51, so that the transmission block 56 drives the plastic part to rotate. After the rotation, the transmission block 56 will leave the top of the inner mold 41 to avoid affecting the separation of the plastic part. The rotation of the telescopic rod 51 will drive the sleeve shell 52 to rotate, so that the sleeve shell 52 will rotate and compress the torsion spring 53. At this time, the inner column 63 will enter the gentle slope section 731 of the path groove 73, so that the connecting sleeve 71 will only rotate slightly. At the same time, due to the movement of the connecting plate 81, the arc plate 64 will pass through the arc notch 83 and contact the force plate 91. As the moving rod 2 continues to drive,The position of the arc plate 64 is fixed, and the force plate 91 will be blocked by the arc plate 64 and stop moving. The force plate 91 will compress the return spring 92 and make the push rod 93 unable to move, and the inner mold 41 will drive the plastic part to continue to move. After the plastic part is rotated, it will be blocked by the push rod 93 and separated from the inner mold 41, and then the moving rod 2 will move back. The connecting sleeve 71 and the extrusion strip 10 will not move temporarily due to the compression force of the first spring 75 and the second spring 11, until the first spring 75 and the second spring 11 rebound. During this period, the telescopic rod 51 will first move with the moving mold 4, and the telescopic rod 51 will make the round rod 54 and the transmission block 5 6 moves synchronously, the round rod 54 will leave the bottom of the extrusion strip 10, and the round rod 54 will no longer fit with the transmission rod 72, and the sleeve 52 will be subjected to the rotation force of the torsion spring 53, so that the telescopic rod 51, the round rod 54 and the transmission block 56 will rotate, and at the same time, the return spring 55 rebounds to make the round rod 54 and the transmission block 56 move back synchronously, and then when the first spring 75 and the second spring 11 rebound, the connecting sleeve 71 and the extrusion strip 10 will also move back accordingly, and at the same time, the connecting sleeve 71 is restricted by the inner column 63 to make the transmission rod 72 rotate synchronously, and finally the connecting sleeve 71 and the extrusion strip 10 are pulled back by the connecting plate 81, and the force plate 91 and the return spring 92 will also automatically move back, so as to perform the next separation work.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A plastic injection mold, comprising a fixing rod (1), characterized in that: The invention also comprises a moving rod (2) arranged on one side of the fixed rod (1), a fixed mold (3) fixedly connected to the outside of the fixed rod (1), a moving mold (4) fixedly connected to the outside of the moving rod (2), two external separation parts (5) both arranged inside the moving mold (4), a limiting part (6), a transmission part (7) connected to the inside of the limiting part (6), an extrusion part (8), an internal separation part (9) arranged inside the moving mold (4), two extrusion strips (10) slidably connected to the outside of the moving rod (2), a second spring (11), and a limiting sleeve (12) arranged on one side of the limiting part (6); the side of the fixed mold (3) close to the moving mold (4) is an external mold (31); The side of the movable mold (4) close to the fixed mold (3) is an inner mold (41), and the inner mold (41) is provided with two installation slots (411), and the two installation slots (411) are symmetrical about the central axis of the inner mold (41) and are located at the upper and lower sides of the inner mold (41), and the two outer separation pieces (5) are respectively located inside the corresponding installation slots (411), and the extrusion strip (10) is located at one end of the outer separation piece (5), and the transmission piece (7) is in contact with one side of the extrusion strip (10), and the limiting piece (6) makes the outer separation piece (5) gradually approach the inner mold (41) through the extrusion strip (10), and then the limiting piece (6) makes the outer separation piece (5) rotate through the transmission piece (7); The limiting member (6) comprises a limiting plate (61) slidably connected to the outside of the moving rod (2), a collar (62) fixedly connected to the middle of the limiting plate (61) on one side, and two inner columns (63) arranged inside the collar (62); The transmission member (7) comprises a connecting sleeve (71) located inside the collar (62), two transmission rods (72) fixedly connected to both sides of the connecting sleeve (71), two path grooves (73) opened on the surface of the connecting sleeve (71), a rotating shaft (74) rotatably connected to the inside of one end of the connecting sleeve (71), and a first spring (75) connected between the rotating shaft (74) and the extrusion member (8), the two transmission rods (72) are colinear and symmetrical about the central axis of the connecting sleeve (71), and the transmission rod (72) is located on one side of the outer separation member (5); The positions of the two path grooves (73) are symmetrical about the central axis of the connecting sleeve (71), the two inner columns (63) are respectively located inside the corresponding path grooves (73), the path groove (73) is divided into a gentle slope section (731) and a steep slope section (732), and the inclination directions of the two path grooves (73) are opposite; The outer separation member (5) comprises a telescopic rod (51) rotatably connected to the outside of the inner mold (41), a sleeve (52) fixedly connected to the outside of one end of the telescopic rod (51), a torsion spring (53) connected between the sleeve (52) and the inner mold (41), a round rod (54) fixedly connected to the outside of the other end of the telescopic rod (51), a return spring (55) connected between the sleeve (52) and the round rod (54), and a transmission block (56) connected to one end of the round rod (54); The extrusion member (8) comprises a connection plate (81) slidably connected to the outside of the moving rod (2), a support shaft (82) fixedly connected to the middle of the connection plate (81), the connection sleeve (71) slidably connected to the outside of the support shaft (82), the first spring (75) connected between the connection plate (81) and the rotating shaft (74), and the second spring (11) connected between the connection plate (81) and the extrusion strip (10); The side of the extrusion strip (10) close to the telescopic rod (51) is an inclined arc surface (101), and the end of the round rod (54) close to the extrusion strip (10) is a arc surface end (541).

2. The plastic injection mold according to claim 1, characterized in that: The extrusion member (8) further comprises arc-shaped notches (83) formed on both sides of the support shaft (82), the arc-shaped notches (83) being the same size as one side of the arc-shaped plate (64), and the arc-shaped notches (83) being located between the arc-shaped plate (64) and the inner separation member (9); The inner separation member (9) comprises a force-bearing plate (91) located on one side of the inner mold (41), a return spring (92) connected between the inner mold (41) and the force-bearing plate (91), and a push rod (93) connected to the return spring (92) on the side close to the inner mold (41), and a plurality of the return springs (92) and the push rods (93) are provided.

3. The plastic injection mold according to claim 2, characterized in that: The limiting member (6) further comprises an arc-shaped plate (64) fixedly connected to the other side of the collar (62), two arc-shaped plates (64) are provided and are symmetrical about the central axis of the collar (62), the arc-shaped plates (64) are in contact with the connecting sleeve (71), and the arc-shaped plates (64) do not contact with the transmission rod (72); The diameter of the limiting sleeve (12) is greater than the diameter of the collar (62), and a circular groove (121) is provided in the middle of the limiting sleeve (12), and the circular groove (121) has the same diameter as the connecting sleeve (71).

4. The plastic injection mold according to claim 2, characterized in that: The round rod (54) is located at an initial position when it is not in contact with the extrusion strip (10); when the round rod (54) is located at the initial position, the transmission block (56) is located outside the outer mold (31), and the length of the inclined arc surface (101) is less than the distance from the transmission block (56) to the inner mold (41).

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