CN118082112A - Large-pitch rectangular threaded guide rail demolding mechanism, injection mold and demolding method - Google Patents
Large-pitch rectangular threaded guide rail demolding mechanism, injection mold and demolding method Download PDFInfo
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- CN118082112A CN118082112A CN202410121552.1A CN202410121552A CN118082112A CN 118082112 A CN118082112 A CN 118082112A CN 202410121552 A CN202410121552 A CN 202410121552A CN 118082112 A CN118082112 A CN 118082112A
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- 238000002347 injection Methods 0.000 title claims abstract description 32
- 239000007924 injection Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 13
- 210000003781 tooth socket Anatomy 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims description 36
- 238000007493 shaping process Methods 0.000 claims description 25
- 238000007789 sealing Methods 0.000 claims description 11
- 238000001746 injection moulding Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 210000001503 joint Anatomy 0.000 claims description 2
- 238000000465 moulding Methods 0.000 description 19
- 238000000605 extraction Methods 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention provides a large-pitch rectangular thread guide rail demoulding mechanism, an injection mould and a demoulding method, wherein the large-pitch rectangular thread guide rail demoulding mechanism comprises a thread forming column and a tooth sleeve, the thread forming column sequentially forms a forming section, a thread matching section and a limiting section from a first end to a second end, and the forming section is provided with a spiral concave part for forming large-pitch rectangular threads; the screw thread matching section is provided with an external thread which is in the same direction as the screw concave part and has the same lead angle; the tooth socket is sleeved on the screw tooth matching section and forms screw thread matching, and the limiting section is used for axially limiting. Smooth demolding of the large-pitch rectangular threaded product can be realized, and the structure is simple.
Description
Technical Field
The invention relates to the field of injection molds, in particular to a large-pitch rectangular threaded guide rail demolding mechanism, an injection mold and a demolding method.
Background
The injection mold is a tool for producing plastic products; is also a tool for endowing plastic products with complete structure and precise dimensions. Injection molding is a process used in mass production of parts of complex shape. Specifically, the heated and melted plastic is injected into a die cavity under high pressure by an injection molding machine, and a formed product is obtained after cooling and solidification.
As shown in fig. 1, a product 1 with internal threads is shown, the pitch of the internal threads 2 of the product 1 is large and the cross section is rectangular. After injection molding, the molding column needs to be separated, but at present, a motor is generally adopted to drive the molding column to rotate so as to realize the screw tooth demolding, namely, the molding column rotates and axially moves to withdraw the product. However, for demoulding of the large-pitch rectangular thread structure, if the conventional tooth demoulding structure is adopted, the following defects are caused: 1. the motor is adopted to drive the molding column to rotate and axially move for demolding, the motor for driving the molding column to rotate and the oil cylinder for driving the molding column to axially withdraw are required to be laid out simultaneously, and the structural layout is complex; 2. because the pitch is too big, in case the rotational speed of motor and the axial of shaping post take out the speed mismatch, extremely easily block, cause the damage of product.
Disclosure of Invention
To solve the problems, the invention provides a large-pitch rectangular threaded guide rail demoulding mechanism, an injection mould and a demoulding method.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
The large-pitch rectangular thread guide rail demoulding mechanism comprises a thread forming column and a tooth sleeve, wherein a forming section, a thread matching section and a limiting section are sequentially formed on the thread forming column from a first end to a second end, and a spiral concave part for forming large-pitch rectangular threads is formed on the forming section; the screw thread matching section is provided with an external thread which is in the same direction as the screw concave part and has the same lead angle; the tooth socket is sleeved on the screw tooth matching section and forms screw thread matching, and the limiting section is used for axially limiting.
An injection mold comprises a front mold, a rear mold and the large-pitch rectangular thread guide rail demolding mechanism; the back mould is including being equipped with the back mould push pedal of back mould shaping board and forming the back mould separation board group that the detachable set up with the back mould push pedal, in screw thread shaping post wears to locate back mould shaping board, back mould push pedal and the back mould separation board group, the shaping section stretches out back mould shaping board, the facing is fixed on the back mould push pedal, spacing section rotatable cooperation is in back mould separation board group and forms axial spacing with back mould separation board group.
Further, the outer diameter of the forming section of the thread forming column is smaller than that of the thread matching section, and a step surface is formed between the forming section and the thread matching section and is flush with the surface of the rear mould forming plate.
Further, the screw tooth cooperation section forms the toper spacing portion in the one end that is close to the shaping section, back mould shaping board has the through-hole that supplies screw tooth cooperation section to wear to establish, the through-hole is the bell mouth, the toper spacing portion of screw tooth cooperation section forms spacing cooperation with the bell mouth to restrict screw tooth cooperation section and stretch out back mould shaping board's surface.
Further, the tooth socket is fixed on one side of the back mould pushing plate, which is away from the back mould forming plate.
Further, the rear mold separation plate group is provided with a through hole for the limiting section to penetrate, the limiting section of the thread forming column penetrates into the through hole, the limiting section of the thread forming column is provided with a bearing, and the outer ring of the bearing is fixed on the inner wall of the through hole so that the thread forming column is rotatably matched in the rear mold separation plate group.
Further, the limiting section is provided with a radially protruding limiting boss, the rear die separating plate group is further extended into the through hole to be in butt joint with the boss, and a limiting block is further assembled at the end part of the through hole; the bearing fitted at the limit segment is limited between the abutment boss and the abutment boss, and/or the bearing fitted at the limit segment is limited between the abutment boss and the stopper.
Further, an inner hole is formed in the thread forming column, an opening of the inner hole is formed in the second end of the thread forming column, a sealing ferrule is assembled at the second end of the thread forming column, the sealing ferrule and the rear mold separating plate group form sealing fit, and the cooling pipe is inserted into the inner hole of the thread forming column through the opening of the second end.
Further, the back mould separation board group is including range upon range of first division board and the second division board that sets up fixedly, back mould separation board group is provided with the guiding hole, be fixed with the guide post in the back mould push pedal, the guide post cooperates in the guiding hole.
A demoulding method of a large-pitch rectangular threaded guide rail comprises the following steps:
A1, carrying out injection molding on a product by adopting the injection mold;
A2, opening the front mould and the rear mould of the injection mould to separate the product from the front mould;
A3, after the front mould and the rear mould of the injection mould complete the mould opening action, under the action of an injection ejection mechanism, the push plate of the rear mould is ejected forward, so that the rear mould push plate is separated from the rear mould separating plate component, in the process, the tooth socket is moved by the push plate, the thread forming column is moved by the separating plate component, and the thread forming column is driven to rotate, so that the forming section of the thread forming column is rotationally extracted from a product, and separation from the product is realized.
The technical scheme provided by the invention has the following beneficial effects:
By adopting the scheme of the application, equipment for driving the thread forming column to rotate, such as a motor, is not required to be arranged, and the structure is simplified; meanwhile, through the separation operation of the rear mould push plate and the rear mould separation plate group, the automatic extraction of the thread forming column from the product is realized, the separation of the rear mould push plate and the rear mould separation plate group and the rotary extraction of the thread forming column are realized to be highly matched, so that the demoulding precision is greatly improved, the mould is not easy to be blocked, and the qualification rate of the product is ensured.
Drawings
FIG. 1 is a schematic diagram showing the structure of an injection molded product in the background art;
FIG. 2 is a schematic view showing the structure of a tooth socket of a large-pitch rectangular thread guide demoulding mechanism in an embodiment;
FIG. 3 is a schematic view of a thread forming column of a high pitch rectangular thread guide stripping mechanism according to an embodiment;
FIG. 4 is a schematic diagram of a large pitch rectangular thread guide demolding mechanism in an embodiment;
FIG. 5 is a schematic view showing a part of the structure of an injection mold according to an embodiment;
Fig. 6 is a cross-sectional view of the structure of fig. 5, in which one of the thread forming posts is hidden.
Detailed Description
For further illustration of the various embodiments, the invention is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present invention. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
The invention will now be further described with reference to the drawings and detailed description.
Referring to fig. 2 to 4, the demoulding mechanism for a large-pitch rectangular thread guide rail provided in this embodiment includes a thread forming column 10 and a tooth socket 20, wherein the thread forming column 10 sequentially forms a forming section 11, a thread matching section 12 and a limiting section 13 from a first end to a second end, and the forming section 11 is provided with a spiral concave portion 111 for forming the large-pitch rectangular thread; the thread matching section 12 is provided with an external thread 121, and the external thread 121 and the spiral concave part 111 are in the same direction and have the same lead angle; as shown in fig. 3 and 4, the spiral concave portion 111 is a spiral channel with two rectangular cross sections recessed in the molding section 11, and when the molding section 11 is applied to an injection mold, the molding section 11 is inserted into a molding cavity for molding the female screw 2 of the product 1 shown in fig. 1. The external threads 121 on the thread engaging section 12 are provided in four, the rotation direction of the external threads 121 is the same as that of the screw concave portion 111, and the lead angle of the external threads 121 is also the same as that of the screw concave portion 111. The tooth socket 20 is sleeved on the thread matching section 12 and forms threaded matching, namely, the tooth socket 20 is provided with an internal thread 21 which is matched with an external thread 121, and the tooth socket 20 forms threaded matching with the external thread 121 of the thread matching section 12 through the internal thread 21. The limiting section 13 is used for axial limiting.
With continued reference to fig. 5 and 6, the embodiment further provides an injection mold, which includes a front mold, a rear mold, and the aforementioned large-pitch rectangular thread guide demolding mechanism; the rear mold comprises a rear mold pushing plate 31 provided with a rear mold forming plate 33 and a rear mold separating plate group 32 which forms a separable arrangement with the rear mold pushing plate 31, the thread forming column 10 is arranged in the rear mold forming plate 33, the rear mold pushing plate 31 and the rear mold separating plate group 32 in a penetrating way, and specifically, the rear mold forming plate 33, the rear mold pushing plate 31 and the rear mold separating plate group 32 are provided with corresponding through holes (the through holes defining the rear mold forming plate 33 are first through holes 331, the through holes of the rear mold pushing plate 31 are second through holes 311, and the through holes of the rear mold separating plate group 32 are third through holes 323). The molding section 11 protrudes from the rear mold forming plate 33, and the front mold and the rear mold are inserted into the molding cavity in the mold clamping state to mold the female screw 2 of the product 1 shown in fig. 1. The dental socket 20 is fixed on the rear mold push plate 31, and then the mold push plate 31 moves together; the limiting section 13 is rotatably matched in the rear mold separating plate group 32 and forms axial limiting with the rear mold separating plate group 32. I.e. the screw-shaped pillars 10 are restrained on the rear mold separation plate group 32 by the restraining sections 13.
The embodiment also provides a demoulding method of the large-pitch rectangular threaded guide rail, which comprises the following steps:
a1, carrying out injection molding on a product by adopting the injection mold to obtain a product 1 shown in figure 1;
A2, opening the front mould and the rear mould of the injection mould to separate the product 1 from the front mould;
A3, after the front mould and the rear mould of the injection mould complete the mould opening action, under the action of an injection ejection mechanism, the rear mould push plate 31 of the rear mould is ejected forward, so that the rear mould push plate 31 is separated from the rear mould separating plate group 32, in the process, the tooth socket 20 moves with the mould push plate 31, the thread forming column 10 moves with the mould separating plate group 32, so that the thread forming column 10 is driven to rotate, the forming section 11 of the thread forming column 10 is pulled out from the product 1 in a rotating way, and the separation from the product 1 is realized.
By adopting the scheme of the application, equipment such as a motor and the like for driving the thread forming column 10 to rotate is not needed, and the structure is simplified; meanwhile, through the separation operation of the rear mold push plate 31 and the rear mold separation plate group 32, the automatic extraction of the thread forming column 10 is realized, and the separation of the rear mold push plate 31 and the rear mold separation plate group 32 and the rotary extraction of the thread forming column 10 are realized to be highly matched because the external threads 121 of the thread matching section 12 and the spiral concave parts 111 are in the same direction and the lead angles are the same, so that the demolding precision is greatly improved, the clamping is not easy, and the qualification rate of the product 1 is ensured.
Further, the outer diameter of the forming section 11 of the thread forming post 10 is smaller than that of the thread matching section 12, so that a step surface 112 is formed between the forming section 11 and the thread matching section 12, and the step surface 112 is flush with the surface of the rear mold forming plate 33; ensuring the appearance of the molded product 1 and facilitating the smooth nesting of the tooth socket 20 into the screw fitting section 12 from the molding section 11.
Meanwhile, in order to prevent the thread matching section 12 of the thread forming post 10 from protruding from the surface of the rear mold forming plate 33, in this embodiment, a limit structure is also provided between the thread matching section 12 and the rear mold forming plate 33, specifically: the screw thread mating section 12 forms the toper spacing portion 122 in the one end that is close to shaping section 11, back mould shaping board 33 has the through-hole that supplies screw thread mating section 12 to wear to establish (i.e. first through-hole 331), first through-hole 331 is the bell mouth, the toper spacing portion 122 of screw thread mating section 12 forms spacing cooperation with first through-hole 331 to limit screw thread mating section 12 to stretch out back mould shaping board 33's surface, guarantee the accurate packing into of screw thread shaping post 10.
The dental socket 20 is fixed on the side of the rear mold push plate 31 away from the rear mold plate 33, and does not affect the assembly of the rear mold plate 33.
The rear mold separating plate set 32 includes a first separating plate 321 and a second separating plate 322 which are stacked and fixedly arranged, the first separating plate 321 and the second separating plate 322 are provided with hole sections, the hole sections 3211 of the first separating plate 321 and the hole sections 3221 of the second separating plate 322 jointly form a third through hole 323, and the limiting section 13 of the thread forming post 10 is matched with the hole sections 3211 of the first separating plate 321 and the hole sections 3221 of the second separating plate 322. The limiting section 13 of the thread forming post 10 is provided with a bearing 42, and an outer ring of the bearing 42 is fixed on an inner wall of the third through hole 323, so that the thread forming post 10 is rotatably matched in the rear mold separation plate group 32. Meanwhile, the limiting section 13 has a radially protruding limiting boss 131, and the rear mold separating plate set 32 further extends into the third through hole 323 to form an abutting boss 324, specifically, the first separating plate 321 extends into the hole section 3221 to form an abutting boss 324. Meanwhile, the first separating plate 321 of the rear mold separating plate set 32 is further equipped with a stopper 41 at an end of the hole section 3221 thereof; the plurality of bearings 42 fitted to the stopper section 13 are respectively limited between the abutment boss 324 and the abutment boss 131, between the abutment boss 324 and the stopper 41, and between the abutment boss 131 and the stopper 41. In this way, the limit section 13 is rotatably fitted in the rear mold separation plate group 32 and forms an axial limit with the rear mold separation plate group 32. The structural design is simple and the connection is stable. Of course, in other embodiments, other assembly methods may be used, as long as the limiting section 13 can be rotatably fitted in the rear mold separation plate set 32 and form an axial limit with the rear mold separation plate set 32.
At the same time, the limiting section 13 is also rotatably fitted in the third through hole 323 of the second separation plate 322 by means of the bearing 42. The screw molding column 10 is internally provided with an inner hole, an opening of the inner hole is formed at the second end of the screw molding column 10, the second end of the screw molding column 10 is provided with a sealing ferrule 43, and the sealing ferrule 43 is in sealing fit with the second separating plate 322 of the rear mold separating plate group 32, and the screw molding column further comprises a cooling pipe 50, and the cooling pipe 50 is inserted into the inner hole of the screw molding column 10 through the opening of the second end. In this way, the injection-molded product can be cooled more quickly from the inside. The sealing engagement of the sealing collar 43 prevents water from flowing into other locations, resulting in better protection.
The rear mold separation plate set 32 is provided with a guide hole, the rear mold pushing plate 31 is fixedly provided with a guide column 60, and the guide column 60 is matched in the guide hole, so that the rear mold separation plate set 32 and the rear mold pushing plate 31 can be precisely guided.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a big pitch rectangle screw thread guide drawing of patterns mechanism which characterized in that: the thread forming column sequentially forms a forming section, a thread matching section and a limiting section from a first end to a second end, and the forming section is provided with a spiral concave part for forming a large-pitch rectangular thread; the screw thread matching section is provided with an external thread which is in the same direction as the screw concave part and has the same lead angle; the tooth socket is sleeved on the screw tooth matching section and forms screw thread matching, and the limiting section is used for axially limiting.
2. An injection mold, includes front mould and rear mould, its characterized in that: further comprising a coarse pitch rectangular thread guide stripping mechanism as recited in claim 1; the back mould is including being equipped with the back mould push pedal of back mould shaping board and forming the back mould separation board group that the detachable set up with the back mould push pedal, in screw thread shaping post wears to locate back mould shaping board, back mould push pedal and the back mould separation board group, the shaping section stretches out back mould shaping board, the facing is fixed on the back mould push pedal, spacing section rotatable cooperation is in back mould separation board group and forms axial spacing with back mould separation board group.
3. An injection mold according to claim 2, characterized in that: the external diameter of the shaping section of screw thread shaping post is less than the thread cooperation section, and then forms a step face between shaping section and thread cooperation section, the step face is parallel and level with the surface of back mould shaping board.
4. An injection mold according to claim 2 or 3, characterized in that: the screw tooth cooperation section forms the toper spacing portion in the one end that is close to the shaping section, back mould shaping board has the through-hole that supplies screw tooth cooperation section to wear to establish, the through-hole is the bell mouth, the toper spacing portion of screw tooth cooperation section forms spacing cooperation with the bell mouth to restrict screw tooth cooperation section and stretch out back mould shaping board's surface.
5. An injection mold according to claim 2, characterized in that: the tooth socket is fixed on one side of the back mould pushing plate, which is away from the back mould forming plate.
6. An injection mold according to claim 2, characterized in that: the rear mold separation plate set is provided with a through hole for the limiting section to penetrate, the limiting section of the thread forming column penetrates into the through hole, the limiting section of the thread forming column is provided with a bearing, and the outer ring of the bearing is fixed on the inner wall of the through hole so that the thread forming column is rotatably matched in the rear mold separation plate set.
7. The injection mold of claim 6, wherein: the limiting section is provided with a radially protruding limiting boss, the rear die separating plate group is further extended into the through hole to be in butt joint with the boss, and a limiting block is further assembled at the end part of the through hole; the bearing fitted at the limit segment is limited between the abutment boss and the abutment boss, and/or the bearing fitted at the limit segment is limited between the abutment boss and the stopper.
8. An injection mold according to claim 2, characterized in that: an inner hole is formed in the thread forming column, an opening of the inner hole is formed in the second end of the thread forming column, a sealing ferrule is assembled at the second end of the thread forming column, the sealing ferrule is in sealing fit with the rear mold separating plate group, and the cooling tube is inserted into the inner hole of the thread forming column through the opening of the second end.
9. An injection mold according to claim 2, characterized in that: the back mould separation board group is including range upon range of first division board and the second division board that sets up fixedly, back mould separation board group is provided with the guiding hole, be fixed with the guide post on the back mould push pedal, the guide post cooperates in the guiding hole.
10. The demoulding method of the large-pitch rectangular threaded guide rail is characterized by comprising the following steps of:
a1, injection molding a product using the injection mold according to any one of claims 2 to 9;
A2, opening the front mould and the rear mould of the injection mould to separate the product from the front mould;
A3, after the front mould and the rear mould of the injection mould complete the mould opening action, under the action of an injection ejection mechanism, the rear mould pushing plate of the rear mould is ejected forward, so that the rear mould pushing plate is separated from the rear mould separating plate component, in the process, the tooth socket is moved by the rear mould pushing plate, the thread forming column is moved by the rear mould separating plate component, and the thread forming column is driven to rotate, so that the forming section of the thread forming column is rotationally pulled out from a product, and separation from the product is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410121552.1A CN118082112A (en) | 2024-01-29 | 2024-01-29 | Large-pitch rectangular threaded guide rail demolding mechanism, injection mold and demolding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410121552.1A CN118082112A (en) | 2024-01-29 | 2024-01-29 | Large-pitch rectangular threaded guide rail demolding mechanism, injection mold and demolding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118082112A true CN118082112A (en) | 2024-05-28 |
Family
ID=91162363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410121552.1A Pending CN118082112A (en) | 2024-01-29 | 2024-01-29 | Large-pitch rectangular threaded guide rail demolding mechanism, injection mold and demolding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118082112A (en) |
-
2024
- 2024-01-29 CN CN202410121552.1A patent/CN118082112A/en active Pending
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