CN109910243B - Injection mold and ejection mechanism thereof - Google Patents
Injection mold and ejection mechanism thereof Download PDFInfo
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- CN109910243B CN109910243B CN201910205251.6A CN201910205251A CN109910243B CN 109910243 B CN109910243 B CN 109910243B CN 201910205251 A CN201910205251 A CN 201910205251A CN 109910243 B CN109910243 B CN 109910243B
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Abstract
The invention relates to an injection mold and an ejection mechanism thereof, comprising a first auxiliary ejection mechanism, a second auxiliary ejection mechanism and a third auxiliary ejection mechanism, wherein the first auxiliary ejection mechanism comprises a guide pillar, an ejection rod and a first base; the second auxiliary ejection mechanism comprises a pressing rod and a second base, the pressing rod is rotatably connected with the second base, and the head end of the pressing rod is superposed with the tail end of the ejection rod; the third auxiliary ejection mechanism comprises a swing rod, a pushing block, a positioning block and a fixing block, the fixing block is mounted on the movable mold frame, the upper end of the swing rod is rotatably mounted with the fixing block, the lower end of the swing rod is provided with the pushing block, the pushing block is laminated with the tail end of the pressing rod, the positioning block is mounted on the fixed mold frame, the swing rod is provided with a directional column, and the directional column is in contact with the lower inclined surface of the positioning block. The ejection mechanism can achieve zero blocking of the elastic block and solve the problem of blocking of the ejection of the existing ejection mechanism.
Description
Technical Field
The invention relates to an injection mold, in particular to an injection mold and an ejection mechanism thereof.
Background
An injection mold is a tool for producing plastic products and also a tool for giving the plastic products complete structure and precise dimensions. The processing method is used for mass production of parts with complex shapes during injection molding, and specifically comprises the steps of injecting heated and melted plastics into a mold cavity from an injection molding machine at high pressure, and cooling and solidifying to obtain a molded product. The molded product needs to be demolded, after cooling molding, the product is stuck in a female die, and a demolding mechanism needs to be designed for demolding, which is troublesome, so that an ejection mechanism is generally designed for an injection mold at present to eject the molded product.
In the design of the ejection mechanism, the use of the elastic block is also in good order, the elastic block has the same function as the core pulling, but due to the addition of the spring structure, no additional hydraulic mechanism is needed for operation, and the use of the elastic block mechanism is gradually increased in some restrictive environments.
Due to the complexity of the appearance structure of the product part, for example, when the barb and the normal direction are difficult to eject, the core pulling part (also called a sliding block) cannot be used, and the core pulling part is divided into the following structures according to the moving direction: firstly, an outward core-pulling sliding block mechanism moves towards the peripheral direction and is far away from the center of a product; secondly, moving towards the peripheral direction and approaching the center of the product, namely an inner core-pulling mechanism; and thirdly, the ejection mechanism of the called elastic block moves upwards and is far away from the center of the product, wherein the function of the elastic block is similar to that of the ejection block. Fig. 1 is a schematic structural diagram of a conventional elastic block ejection mechanism, and an elastic block 2 is controlled by a spring 4 to be ejected or not, so that the structure is relatively simple.
The structures and specific surfaces such as a horizontal plane can form a certain angle, and the core pulling is firstly pulled out and then the product is ejected during general injection molding, otherwise, the phenomenon of blocking can occur. The normal elastic block can realize the ejection function by virtue of a spring, but the phenomenon of ejection locking can cause serious production halt.
Disclosure of Invention
The invention aims to provide an injection mold and an ejection mechanism thereof.
In order to achieve the purpose, the scheme of the invention is as follows: an ejection mechanism for an injection mold comprises an elastic block ejection mechanism and an auxiliary ejection mechanism, wherein the auxiliary ejection mechanism comprises a first auxiliary ejection mechanism, a second auxiliary ejection mechanism and a third auxiliary ejection mechanism;
the first auxiliary ejection mechanism comprises a guide pillar, an ejection rod and a first base, the first base is fixed on the fixed die frame, the ejection rod is rotatably connected with the first base, the upper end of the guide pillar is fixed on the elastic block ejection mechanism, and the lower end of the guide pillar is abutted against the head end of the ejection rod;
the second auxiliary ejection mechanism comprises a pressing rod and a second base, the pressing rod is rotatably connected with the second base, the second base is fixed on the fixed mold frame, and the head end of the pressing rod is in press-contact fit with the tail end of the ejection rod;
the ejection mechanism is assisted to the third includes swinging arms, promotion piece, locating piece, fixed block and bullet preforming, the one side at the movable mould frame is installed to the fixed block, the upper end and the rotatable installation of fixed block of swinging arms, the one end of bullet preforming is fixed on the fixed block, and the other end is fixed on the swinging arms, the lower terminal surface installation of swinging arms promotes the piece, the one end that promotes the piece contacts with the tail end of pushing arms, the locating piece is installed in one side of fixed mould frame, the lower terminal surface of locating piece is the inclined plane of tilt up, install directional post on the swinging arms, directional post contacts with the lower terminal surface of locating piece.
Further, according to the ejection mechanism for the injection mold, the tail end of the ejection rod is of a L-shaped structure, the head end of the pressing rod is of a right-angled structure, and the tail end of the ejection rod is matched with the head end of the pressing rod.
Further, according to the ejection mechanism for the injection mold, the first base comprises a first bottom plate, two mounting lugs are arranged on the first bottom plate in parallel, the ejection rod is connected between the two mounting lugs through a pin, and the ejection rod can rotate around the pin.
Further, according to the ejection mechanism for the injection mold, an elastic structure is arranged between the tail end of the ejection rod and the first base, the elastic structure comprises a spring and a spring pressing plate, the upper end of the spring is in contact with the ejection rod, the lower end of the spring is fixed through the spring pressing plate, and the spring pressing plate is fixed on the first base through a screw.
Further, according to the ejection mechanism for the injection mold, the second base comprises a second bottom plate, two mounting lugs are arranged on the second bottom plate in parallel, the pressing rod is mounted between the two mounting lugs through a pin, and the pressing rod can rotate around the pin.
Further, according to the ejection mechanism for the injection mold, provided by the invention, the limiting column is arranged above the pressing rod and is fixed on the pressing rod through a screw.
Further, according to the ejection mechanism for the injection mold, the middle part of the pushing block is provided with a swinging rod placing groove, and the lower end of the swinging rod is arranged in the swinging rod placing groove.
Further, according to the ejection mechanism for the injection mold, the orientation column is a screw, the screw penetrates through the swing rod and is fixed on the swing rod, and the end of the screw is located on the lower end face of the positioning block and is in contact with the lower end face of the positioning block.
Further, according to the ejection mechanism for the injection mold of the present invention, the swing lever is rotatably connected to the fixed block by a pin.
The invention also provides an injection mold adopting the ejection mechanism.
The invention achieves the following beneficial effects: the injection mold has the advantages that the auxiliary ejection mechanism is added, so that the phenomenon that the elastic block is blocked and cannot eject can be effectively prevented, most parts of the added auxiliary ejection mechanism are arranged outside the injection mold, the internal working space is not influenced, and the parts are convenient to replace and operate. Secondly, the invention adopts pure mechanical braking, and high energy consumption parts such as a hydraulic cylinder are omitted.
Drawings
Fig. 1 is a schematic structural diagram of a conventional elastic block ejection mechanism;
FIG. 2 is a schematic cross-sectional view of the ejection mechanism of the present invention;
FIG. 3 is a schematic perspective view of the ejection structure of the present invention;
FIG. 4 is a schematic view of the structure relationship between the positioning block and the orientation column of the present invention.
In the figure, 1-fixed die frame, 2-elastic block, 3-shoulder bolt, 4-spring, 5-screw, 6-guide pillar, 7-ejector rod, 8-pin, 9-first base, 10-screw, 11-screw, 12-spring pressure plate, 13-spring, 14-screw, 15-spacing pillar, 16-pressing rod, 17-pin, 18-second base, 19-screw, 20-screw, 21-pushing block, 22-swinging rod, 23-orientation pillar, 24-pin, 25-screw, 26-positioning block, 27-elastic sheet, 28-pin, 29-screw, 30-fixing block, 31-movable die frame;
h-the travel of the elastic block, a-the moving direction of the elastic block, b-the moving direction of the swinging rod, c-the rotating direction of the ejection rod, d-the rotating direction of the pressing rod and e-the rotating direction of the swinging rod.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
The ejection mechanism comprises an elastic block ejection mechanism, and the elastic block ejection mechanism is used for ejecting a molded injection product. As shown in fig. 1, the elastic block ejection mechanism comprises an elastic block 2, a shoulder bolt 3 and a spring 4, wherein the spring 4 is arranged below the elastic block 2, the shoulder bolt 3 penetrates through the elastic block 2 and the spring 4 and is fixed on the fixed mold frame, and the direction a is consistent with the moving direction of the spring 4. During injection molding, the spring 4 is in a pressed state, after the mold is opened, the spring 4 ejects the elastic block 2, and the stroke of the elastic block 2 is h. When the mold is closed again, the elastic block 2 rebounds, and the spring 4 is in a pressed state again.
In order to effectively prevent the bullet block from being stuck and not popping out, an auxiliary ejection mechanism is additionally arranged on the bullet block ejection mechanism, as shown in fig. 2, the auxiliary ejection mechanism comprises a first auxiliary ejection mechanism, a second auxiliary ejection mechanism and a third auxiliary ejection mechanism.
The first auxiliary ejection mechanism comprises a guide pillar 6, an ejector rod 7 and a first base 9, the first base 9 is fixed on the fixed die frame 1, the ejector rod 7 is rotatably connected with the first base 9, the upper end of the guide pillar 6 is fixed on the elastic block, the lower end of the guide pillar 6 is abutted to the upper surface of the head end of the ejector rod 7, and the direction c is the rotation direction of the ejector rod 7 around the pin 8.
In this embodiment, as shown in fig. 3, the first base 9 includes a first bottom plate and two mounting lugs arranged in parallel on the first bottom plate, pin holes have been opened on the two mounting lugs, the ejector rod 6 is installed between the two mounting lugs through the pin 8, the ejector rod can rotate along the direction c around the pin 8, when the mold is opened, the ejector rod 7 pushes the guide pillar 6 while rotating along the direction c, so that the guide pillar 6 receives a force along the direction a, and moves along the direction a, thereby pushing the ejection mechanism of the elastic block to eject the injection mold from the molded injection product.
The second auxiliary ejection mechanism comprises a pressing rod 16 and a second base 18, the pressing rod 16 is rotatably connected with the second base 18, the second base 18 is fixed on the fixed mold frame 1, the head end of the pressing rod 16 is in press contact with the upper surface of the tail end of the ejection rod 7, and the direction d is the rotating direction of the pressing rod 16 around the pin 17.
In this embodiment, as shown in fig. 3, the second base includes a second bottom plate and two mounting lugs arranged in parallel on the second bottom plate, pin holes are formed in the two mounting lugs, the pressing rod 16 is mounted between the two mounting lugs through a pin 17, the pressing rod 16 can rotate around the pin 17 along a direction d, and the ejector rod 7 is pressed to rotate along a direction c while the pressing rod 16 rotates.
Preferably, the tail end of the ejector rod is of a Z-shaped structure, the head end of the pressing rod is of a Z-shaped structure, the tail end of the ejector rod is in press-contact fit with the head end of the pressing rod, and through the matching structure, the ejector rod and the pressing rod can be better matched, so that the situation that the pressing rod is separated in the rotating process is avoided.
Further optimize, set up the elastic construction between the tail end of knock-out lever and the first base, the elastic construction includes spring and spring clamp plate, the upper end and the knock-out lever contact of spring, the lower extreme of spring passes through spring clamp plate to be fixed, spring clamp plate passes through the fix with screw on first base.
The third auxiliary ejection mechanism comprises a swinging rod 22, a pushing block 21, a positioning block 26, a fixing block 30, a directional column 23 and an elastic sheet 27. The fixed block 30 is fixedly installed at one side of the movable mold frame 31 through a screw 29, and the upper end of the swing rod 22 and the fixed block 30 are rotatably installed through a pin 28, wherein the direction e is the swing direction of the swing rod 22 around the pin 28.
One end of the spring plate 27 is fixed on the fixed block 30, and the other end is fixed on the swing rod 22, so that the spring plate 27 can be used for controlling the swing rod 22 to reset when the mold is closed, and the rotation angle of the swing rod 22 can be adjusted freely.
The pushing block 21 is fixedly installed on the lower end face of the swinging rod 22 through a screw 20, one end of the pushing block 21 is located below the tail end of the pressing rod 16, and when the ejection mechanism is in a balanced state, the end of the pushing block 21 is in contact with the lower end face of the tail end of the pressing rod 16.
As shown in fig. 4, the positioning block 26 is installed at one side of the mold frame 1, the positioning block 26 is located at the same side as the swing rod 22, and the lower end of the positioning block 26 is provided with an upward inclined surface, which is the moving direction b of the swing rod 22 during mold opening.
The swing rod 22 is provided with a directional column 23, and when the ejection mechanism is in a balanced state, the directional column 23 is in contact with the inclined surface at the lower end of the positioning block 26. Wherein the direction b is the moving direction of the orientation post 23 along the positioning block 26.
In this embodiment, the positioning column is provided as a screw 23, the screw 23 penetrates through the swing lever 22 and is fixed on the swing lever 22, and the end of the screw exceeds the swing lever 22 by a certain length, and the exceeding part is contacted with the inclined surface at the lower end of the positioning block 26 when the ejection mechanism is in a balanced state. When the mold is opened, the screw 23 moves in the direction b of the inclined surface as the movable mold frame moves in the mold opening direction.
The middle part of the pushing block 21 is provided with a swinging rod 22 placing groove, the lower end of the swinging rod is arranged in the swinging rod placing groove, and two side walls of the swinging rod placing groove are provided with certain widths for contacting with the pressing rod. During mold opening, along with the movement of the movable mold frame, the swinging rod rotates along the direction e and simultaneously moves along the direction b under the action of the orientation column 23, the pressing sheet 27 is in a pressing state, and meanwhile, the pushing block 21 pushes the pressing rod 16 to rotate along the direction d. When the mold is closed again, the swing lever 22 is reset by the spring piece.
In the injection mold of the invention, during injection molding, the spring 4 is in a compressed state, and the ejection mechanism is in a balanced state shown in fig. 2. When the mold is opened, the movable mold frame 31 moves in the mold opening direction, thereby moving the fixed block 30 in the mold opening direction, and at this time, the swing lever 22 and the screw 23 rotate around the pin 28 while moving in the direction b (and the lower inclined surface of the positioning block 26), and the pressing piece 27 is in a pressed state.
Since the positioning block 21 moves along with the swing rod 22, the pressing rod 16 will rotate along the direction d along the pin 17, so that the ejecting rod 7 will rotate along the direction c along the pin 8, and then the guide post 6 will be subjected to a force along the direction a, so as to drive the elastic block to move along a certain direction to eject the product. The positioning block 26 is used for limiting the ejection distance, and within a certain distance, the swing rod 22 touches the positioning block, so as to rise along the inclined surface at the lower end of the positioning block 26, and after the certain distance is reached, the swing rod 22 will be separated from the push rod 16, the push rod 16 stops moving, and the ejection process is finished.
When the mold is closed again, the elastic block 2 is subjected to mold closing force and returns to the original position by a spring arranged in the pressing rod 16 and a spring 4 in the elastic block, the ejection rod 7 is reset by the spring 13, and the swinging rod 22 is reset by the pressing piece.
According to the invention, the phenomenon that the elastic block is clamped and does not pop up can be effectively prevented by adding the auxiliary ejection mechanism, most parts of the added auxiliary ejection mechanism are arranged outside the injection mold, the internal working space is not influenced, and the parts are convenient to replace and operate.
Claims (10)
1. The utility model provides an ejection mechanism for injection mold, ejection mechanism includes bullet piece ejection mechanism, its characterized in that:
the elastic block ejection mechanism comprises an elastic block, a shoulder bolt and a spring, wherein the spring is arranged below the elastic block, and the shoulder bolt penetrates through the elastic block and the spring and is fixed on the fixed die frame;
the ejection mechanism further comprises an auxiliary ejection mechanism, and the auxiliary ejection mechanism comprises a first auxiliary ejection mechanism, a second auxiliary ejection mechanism and a third auxiliary ejection mechanism;
the first auxiliary ejection mechanism comprises a guide pillar, an ejection rod and a first base, the first base is fixed on the fixed die frame, the ejection rod is rotatably connected with the first base, the upper end of the guide pillar is fixed on the elastic block ejection mechanism, and the lower end of the guide pillar is abutted against the head end of the ejection rod;
the second auxiliary ejection mechanism comprises a pressing rod and a second base, the pressing rod is rotatably connected with the second base, the second base is fixed on the fixed mold frame, and the head end of the pressing rod is in press-contact fit with the tail end of the ejection rod;
the third auxiliary ejection mechanism comprises a swinging rod, a pushing block, a positioning block, a fixing block and an elastic pressing sheet, the fixing block is installed on one side of the movable mold frame, the upper end of the swinging rod is rotatably installed with the fixing block, one end of the elastic pressing sheet is fixed on the fixing block, the other end of the elastic pressing sheet is fixed on the swinging rod, the pushing block is installed on the lower end face of the swinging rod, one end of the pushing block is in contact with the tail end of the pushing rod, the positioning block is installed on one side of the fixed mold frame, the lower end face of the positioning block is an inclined face which inclines upwards, an orientation column is installed on the swinging rod, and the orientation column is in contact;
when the mold is opened, the positioning block moves along with the swinging rod, the pressing rod rotates anticlockwise, the ejecting rod rotates clockwise, the guide post is subjected to an upward oblique force to drive the elastic block to move along a preset direction, and a product is ejected; when the mold is closed, the elastic block is subjected to mold closing force, the spring arranged in the pressing rod and the spring in the elastic block restore to the original position, the ejection rod resets through the spring, and the swinging rod resets through the elastic pressing sheet.
2. The ejection mechanism of claim 1, wherein the tail end of the ejector rod is of a "L" shape, the head end of the knock-out rod is of a "Right" shape matching the tail end of the ejector rod, and the tail end of the knock-out rod matches the head end of the knock-out rod.
3. The ejection mechanism for an injection mold according to claim 1, wherein the first base comprises a first bottom plate, two mounting lugs are arranged on the first bottom plate in parallel, the ejection rod is connected between the two mounting lugs through a pin, and the ejection rod can rotate around the pin.
4. The ejection mechanism for the injection mold as claimed in claim 3, wherein an elastic structure is arranged between the tail end of the ejection rod and the first base, the elastic structure comprises a spring and a spring pressing plate, the upper end of the spring is in contact with the ejection rod, the lower end of the spring is fixed by the spring pressing plate, and the spring pressing plate is fixed on the first base by a screw.
5. The ejection mechanism for an injection mold according to claim 1, wherein the second base comprises a second bottom plate, two mounting lugs are arranged on the second bottom plate in parallel, the pressing rod is mounted between the two mounting lugs through a pin, and the pressing rod can rotate around the pin.
6. The ejection mechanism for the injection mold according to claim 5, wherein a limiting column is mounted above the pressing rod, and the limiting column is fixed on the pressing rod through a screw.
7. The ejection mechanism for an injection mold as claimed in claim 1, wherein a swing lever placing groove is provided in the middle of the push block, and a lower end of the swing lever is provided in the swing lever placing groove.
8. The ejection mechanism for an injection mold according to claim 1, wherein the orientation post is a screw, the screw passes through the swing lever and is fixed to the swing lever, and an end of the screw is located at and contacts a lower end surface of the positioning block.
9. The ejection mechanism for an injection mold of claim 1, wherein the oscillating lever is rotatably coupled to the fixed block by a pin.
10. An injection mold employing the ejection mechanism of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910205251.6A CN109910243B (en) | 2019-03-18 | 2019-03-18 | Injection mold and ejection mechanism thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910205251.6A CN109910243B (en) | 2019-03-18 | 2019-03-18 | Injection mold and ejection mechanism thereof |
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| Publication Number | Publication Date |
|---|---|
| CN109910243A CN109910243A (en) | 2019-06-21 |
| CN109910243B true CN109910243B (en) | 2021-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910205251.6A Active CN109910243B (en) | 2019-03-18 | 2019-03-18 | Injection mold and ejection mechanism thereof |
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| CN (1) | CN109910243B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206416450U (en) * | 2016-12-17 | 2017-08-18 | 台州市黄岩伟多塑料模具厂 | Automobile lampshade outer casing mold and its guide pillar bullet block structure |
| CN207669654U (en) * | 2017-11-02 | 2018-07-31 | 常州星宇车灯股份有限公司 | A kind of bullet block structure for penetrating pushing method for double-colored inverted mold first |
-
2019
- 2019-03-18 CN CN201910205251.6A patent/CN109910243B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206416450U (en) * | 2016-12-17 | 2017-08-18 | 台州市黄岩伟多塑料模具厂 | Automobile lampshade outer casing mold and its guide pillar bullet block structure |
| CN207669654U (en) * | 2017-11-02 | 2018-07-31 | 常州星宇车灯股份有限公司 | A kind of bullet block structure for penetrating pushing method for double-colored inverted mold first |
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| Publication number | Publication date |
|---|---|
| CN109910243A (en) | 2019-06-21 |
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Effective date of registration: 20211202 Address after: 401120 No. c42-1, jingkaiyuan, Yubei District, Chongqing Patentee after: Huayu Visual Technology (Chongqing) Co.,Ltd. Address before: 201821 No. 767, Yecheng Road, Shanghai, Jiading District Patentee before: HUAYU VISION TECHNOLOGY (SHANGHAI) Co.,Ltd. |
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