CN214290839U - Manufacturing tool for R angle of inner cavity of bent pipe - Google Patents

Abstract

The utility model provides a manufacturing tool at return bend inner chamber R angle relates to return bend equipment technical field. The technical problem that the R angle of the inner cavity of the bent pipe is difficult to form in the prior art is solved. It includes the rear module, the front portion module, the needle is inlayed in the location, needle and plastic part are inlayed in the direction, prefabricate out the plastic part in advance through the requirement according to the return bend design shape of difference, and the overall dimension of plastic part and the inner chamber size phase-match that needs are by fashioned injection base, the plastic part can be placed in injection base shaping cavity, and inlay the needle through the location and fix the both ends of plastic part, form the injection base in injection base shaping cavity behind rear portion module and the anterior module compound die, use solution dissolves the plastic part after the injection base shaping and gets rid of and can form final finished product, generate the R angle, the manufacturing process is simple more effective, the whole degree of automation of preparation instrument is high, it is very convenient to make.

Description

Manufacturing tool for R angle of inner cavity of bent pipe

Technical Field

The utility model belongs to the technical field of the return bend equipment technique and specifically relates to a manufacturing tool at return bend inner chamber R angle is related to.

Background

The return bend is the common structure in fields such as chemical industry, petrochemical industry, aviation, because the return bend inner chamber is difficult to process, adopts one shot forming's technology to the higher return bend of size precision requirement mostly, and current equipment is when the R angle of preparation return bend inner chamber, because the mould mold insert is straight shape, can't make R's appearance, if make the appearance, the mould will be unable to deviate from in the product die cavity at the during operation, consequently leads to return bend inner chamber R angle shaping comparatively difficult.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a manufacturing tool at return bend inner chamber R angle to solve the comparatively difficult technical problem of return bend inner chamber R angle shaping that exists among the prior art. The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a manufacturing tool for an R angle of an inner cavity of a bent pipe comprises a rear module, a front module, a positioning insert needle, a guide insert needle and a plastic part, wherein the rear module comprises a rear mold core, a first rear forming groove is formed in the rear mold core, the front module comprises a front mold core, a first front forming groove is formed in the front mold core, the first rear forming groove and the first front forming groove can enclose to form an injection blank forming cavity matched with the external shape of an injection blank after the rear mold core and the front mold core are pressed together, the plastic part can be placed in the injection blank forming cavity, and the external dimension of the plastic part is matched with the size of the inner cavity of the injection blank;

the rear mold core is provided with two rear half circular grooves communicated with the first rear forming groove, the front mold core is provided with two front semi-circular grooves communicated with the first front forming groove, and the two rear half circular grooves and the two front semi-circular grooves can enclose to form two tubular cavities for the positioning insert needle and the guide insert needle to slide after the rear mold core and the front mold core are pressed together;

the head ends of the positioning insert needle and the guide insert needle are connected with a group of sliding structures and can move in the tubular cavity under the driving of the sliding structures, the needle head ends of the positioning insert needle and the guide insert needle can block the tubular cavity when moving to the limit position farthest away from the plastic part in the tubular cavity, and the needle head ends of the positioning insert needle and the guide insert needle can be detachably connected with one end of the plastic part when moving to the limit position closest to the plastic part in the tubular cavity;

the rear die core is provided with a first flow passage, and two ends of the first flow passage are respectively communicated with the injection blank molding cavity and the external feeding structure.

Preferably, the rear module further comprises a rear mold body, the rear mold core is embedded in the rear mold body and detachably connected with the rear mold body, the front module further comprises a front mold body, and the front mold core is embedded in the front mold body and detachably connected with the front mold body.

Preferably, the rear module further includes a rear mold plate and two support plates, the rear mold body and the rear mold plate are connected together by the two support plates, the rear module is connected to an external structure by the rear mold plate, the front module further includes a front mold plate, the front mold plate is connected to the front mold body, and the front module is connected to the external structure by the front mold plate.

Preferably, the sliding structure includes a slider assembly and two pressing strips, the number of the pressing strips is two, the rear mold core is provided with a slide way for the slider assembly to slide, the displacement of the rear mold core in the depth direction of the slide way is limited by the two pressing strips, the head ends of the positioning insert and the guide insert are both connected with a group of slider assemblies, and the slider assemblies are connected with an external structure and move under the driving of the external structure to drive the positioning insert and the guide insert to move.

Preferably, the rear module still includes thimble structure, thimble structure includes the first thimble of thimble board and a plurality of, first back shaping groove is every a first through-hole has all been seted up to the corresponding position of first thimble, the head end of first thimble is connected on the thimble board, the syringe needle end of first thimble is worn to establish first through-hole department and will first through-hole shutoff, external force promotes forward the thimble board enables the thimble board orientation back mould benevolence removes so that the syringe needle end of first thimble wears out first through-hole gets into in the injection blank shaping cavity and will the object in the injection blank shaping cavity is ejecting.

Preferably, still include plastic part forming structure, plastic part forming structure includes behind the plastic part mould and plastic part front mould, behind the plastic part mould with the plastic part front mould corresponds respectively to inlay establishes back mould benevolence with in the front mould benevolence, the last shaping groove after the second has been seted up on the plastic part mould, the shaping groove before the second has been seted up on the plastic part front mould, behind the second shaping groove with the shaping groove before the second can form after enclosing and close with plastic part shape assorted plastic part shaping cavity, the second runner has been seted up on the back mould benevolence, the both ends of second runner respectively with plastic part shaping cavity and outside feed structure are linked together.

Preferably, plastic part forming structure still includes a plurality of second thimble, the shaping groove is every behind the second a second through-hole has all been seted up to the corresponding position of second thimble, the syringe needle end of second thimble wears to establish second through-hole department will second through-hole shutoff, external force promote a plurality of second thimble forward enables the syringe needle end of second thimble is worn out the second through-hole gets into in the plastic part shaping cavity and with object in the plastic part shaping cavity is ejecting.

Preferably, a cross-shaped groove is formed in the needle head end of the positioning insert needle, and a cross-shaped end matched with the cross-shaped groove is arranged at one end, connected with the positioning insert needle, of the plastic part.

Preferably, a cylindrical groove is formed in the needle head end of the guide insert needle, and a cylindrical end matched with the cylindrical groove is arranged at one end, connected with the guide insert needle, of the plastic part.

Preferably, the first flow passage is an arc-shaped structure.

The utility model provides a manufacturing tool at return bend inner chamber R angle, prefabricate out the plastic part in advance through the requirement according to the return bend design shape of difference, and the overall dimension of plastic part and the inner chamber size phase-match that needs are by fashioned injection base, the plastic part can be placed in injection base shaping cavity, and inlay the needle through the location and fix the both ends of plastic part, form the injection base in injection base shaping cavity behind rear portion module and the anterior module compound die, use solution to dissolve the plastic part after the injection base shaping and get rid of and can form ultimate finished product, generate the R angle, the manufacturing process is simple more effective, the whole degree of automation of manufacturing tool is high, it is very convenient to make.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a detailed view of a rear mold core (not shown with an injection blank) in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a rear mold insert according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a front mold core and a front mold body according to an embodiment of the present invention;

figure 4 is a block diagram of a rear module (showing injection blanks and a slide construction) in an embodiment of the invention;

fig. 5 is a combined structure diagram of the first thimble, the second thimble and the rear module in the embodiment of the present invention;

FIG. 6 is a block diagram of an embodiment of the present invention when a rear module and a front module are pressed together;

fig. 1, rear module; 11. a rear mold core; 111. a first rear forming groove; 112. a rear semi-circular groove; 113. a first flow passage; 114. a second flow passage; 12. a rear mold body; 13. a rear template; 14. a support plate; 15. a thimble structure; 151. an ejector plate; 152. a first thimble; 153. a first through hole;

2. a front module; 21. a front mold core; 211. a first front molding groove; 212. a front semi-circular slot; 22. a front mold body; 23. a front template;

3. positioning the insert pin;

4. guiding the insert pin;

5. a plastic part;

6. injecting a blank;

7. a sliding structure; 71. a slider assembly; 72. compressing the strips;

8. forming a plastic part; 81. a plastic part rear mold; 811. a second rear forming groove; 812. a second through hole; 82. a plastic part front mold; 821. a second front molding groove; 83. a second thimble.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "lateral", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", and the like indicate orientations or positional relationships based on those shown in fig. 1, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Referring to fig. 1 to 6, the present invention provides a tool for manufacturing an R corner in an inner cavity of a bent tube, including a rear module 1, a front module 2, a positioning insert pin 3, a guiding insert pin 4 and a plastic part 5, wherein the rear module 1 includes a rear mold core 11, the rear mold core 11 is provided with a first rear molding groove 111, the front module 2 includes a front mold core 21, the front mold core 21 is provided with a first front molding groove 211, the rear module 1 and the front module 2 can move in opposite directions under the driving of an external structure and finally press together, so that the rear mold core 11 and the front mold core 21 are pressed together, the first rear molding groove 111 and the first front molding groove 211 can enclose to form an injection blank molding cavity matched with the external shape of an injection blank 6, the external size of the plastic part 5 is matched with the size of the inner cavity of the injection blank 6 to be molded, and the corresponding plastic part 5 can be manufactured in advance according to different shape requirements, the plastic part 5 can be placed in the injection blank molding cavity, and the plastic part 5 can preferably be made of a material which can perform a chemical reaction with the dissolving solution, so that the plastic part 5 can be dissolved and removed by the solution after the injection blank 6 is molded to form a final finished product;

the rear die core 11 is provided with two rear half circular grooves 112 communicated with the first rear forming groove 111, the front die core 21 is provided with two front semi-circular grooves 212 communicated with the first front forming groove 211, and after the rear die core 11 and the front die core 21 are pressed together, the two rear half circular grooves 112 and the two front semi-circular grooves 212 can enclose to form two tubular cavities for the sliding of the positioning insert needle 3 and the guiding insert needle 4;

the head end of the positioning insert needle 3 and the head end of the guide insert needle 4 are connected with a group of sliding structures 7 and can move in the tubular cavity under the driving of the sliding structures 7, the needle head ends of the positioning insert needle 3 and the guide insert needle 4 can seal the tubular cavity when moving to the extreme position farthest away from the plastic part 5 in the tubular cavity, the needle head ends of the positioning insert needle 3 and the guide insert needle 4 can be detachably connected with one end of the plastic part 5 when moving to the extreme position closest to the plastic part 5 in the tubular cavity, the two ends of the plastic part 5 are fixed through the positioning insert needle 3 and the guide insert needle 4, and then the injection molding process is carried out;

the rear mold insert 11 is provided with a first flow passage 113, two ends of the first flow passage 113 are respectively communicated with the injection blank molding cavity and an external feeding structure, the external feeding structure can feed injection feed into the injection blank molding cavity through the first flow passage 113, an injection blank 6 is formed after cooling, the positioning insert needle 3 and the guide insert needle 4 can be separated from the injection blank 6 at the moment, an independent injection blank 6 is formed, the injection blank 6 is soaked in a solution to dissolve and remove the plastic part 5, and a final finished product is formed.

As an optional embodiment, the rear module 1 further includes a rear mold body 12, the rear mold core 11 is embedded in the rear mold body 12 and detachably connected to the rear mold body 12, the rear mold core 11 can be embedded in the rear mold body 12 and connected together by a bolt, the front module 2 further includes a front mold body 22, the front mold core 21 is embedded in the front mold body 22 and detachably connected to the front mold body 22, and the front mold core 21 can be embedded in the front mold body 22 and connected together by a bolt, in this embodiment, the rear mold core 11 and the front mold core 21 are preferably made of a material with higher strength and higher hardness, in comparison, the rear mold body 12 and the front mold body 22 are made of a material with slightly lower strength than the rear mold core 11 and the front mold core 21, because the rear mold body 12 and the front mold body 22 need to be provided with more holes and larger grooves during manufacturing, the material with lower strength is more beneficial to manufacturing, and because the rear mold core 11 and the front mold core 21 are main stress structures during mold closing and the first rear forming groove 111 and the first front forming groove 211 are arranged in the rear mold core 11 and the front mold core 21, the design specifications of the rear mold core 11 and the front mold core 21 with higher strength can be improved, and the service life is prolonged.

As an alternative embodiment, the rear module 1 further includes a rear mold plate 13 and a support plate 14, the number of the support plates 14 is two, the rear mold 12 and the rear mold 13 are connected together by the two support plates 14, the rear module 1 is connected to an external structure by the rear mold plate 13, the external structure connected to the rear mold plate 13 can drive the rear module 1 to move towards the front module 2, the support plate 14 is configured to provide a space for a thimble structure 15 mentioned below, the front module 2 further includes a front mold plate 23, the front mold plate 23 is connected to a front mold 22, the front module 2 is connected to the external structure by the front mold plate 23, and the external structure connected to the front mold plate 23 can drive the front module 2 to move towards the rear module 1.

As an optional embodiment, the sliding structure 7 includes two sliding block assemblies 71 and two pressing strips 72, the number of the pressing strips 72 is two, a sliding way for the sliding block assemblies 71 to slide is formed in the rear mold core 11, and the displacement of the sliding way in the depth direction is limited by the two pressing strips 72, so that the sliding block assemblies 71 can only move along the length direction of the sliding way, the head ends of the positioning pins 3 and the head ends of the guide pins 4 are both connected to one set of the sliding block assemblies 71, the sliding block assemblies 71 are connected to an external structure and move under the driving of the external structure to drive the positioning pins 3 and the guide pins 4 to move, and the positioning pins 3 and the guide pins 4 are connected to or disconnected from the two ends of the plastic part 5.

As an optional implementation manner, the rear module 1 further includes an ejector pin structure 15, the ejector pin structure 15 includes an ejector pin plate 151 and a plurality of first ejector pins 152, the first rear molding groove 111 has a first through hole 153 at a corresponding position of each first ejector pin 152, the first through hole 153 can also simultaneously open the rear mold core 11 and the rear mold body 12, a head end of the first ejector pin 152 is connected to the ejector pin plate 151, a needle end of the first ejector pin 152 penetrates the first through hole 153 and plugs the first through hole 153, when not in use, the sealing in the injection blank molding cavity can be maintained, an external force pushes the ejector pin plate 151 forward to enable the ejector pin plate 151 to move toward the rear mold core 11 so that the needle end of the first ejector pin 152 penetrates through the first through hole 153 to enter the injection blank molding cavity and eject an object in the injection blank molding cavity, thereby solving the problem that it is inconvenient to directly take out the injection blank 6 in the injection blank molding cavity, the different first ejection pins 152 are located at different positions of the injection blank 6 and eject the injection blank 6 at the same time, so as to protect the structure of the injection blank 6 from being damaged.

As an optional implementation manner, the injection molding machine further comprises a plastic part molding structure 8, the plastic part molding structure 8 can perform the pre-molding of the plastic part 5, so that the manufacturing tool mentioned in this embodiment can not only manufacture the injection blank 6, but also perform the plastic part 5, and is dual-purpose, thereby saving space, improving work efficiency, and reducing cost, the plastic part molding structure 8 comprises a plastic part rear mold 81 and a plastic part front mold 82, the plastic part rear mold 81 and the plastic part front mold 82 are respectively embedded in the rear mold core 11 and the front mold core 21 correspondingly, the plastic part rear mold 81 is provided with a second rear molding groove 811, the plastic part front mold 82 is provided with a second front molding groove 821, the second rear molding groove 811 and the second front molding groove 821 can form a plastic part molding cavity matched with the shape of the plastic part 5 after being enclosed, the rear mold core 11 is provided with a second flow channel 114, two ends of the second flow channel 114 are respectively communicated with the plastic part molding cavity and the external feeding structure, the external feeding structure can send the injection feed into the plastic part molding cavity through the second flow passage 114, the molding machine forms the plastic part 5 after heating, the external feeding structure can control the opening of the first flow passage 113 and the second flow passage 114, and different flow passages are opened when different structures are manufactured.

As an optional implementation manner, the plastic part forming structure 8 further includes a plurality of second pins 83, a second through hole 812 is formed in a corresponding position of each second pin 83 of the second rear forming groove 811, a needle end of each second pin 83 penetrates through the second through hole 812 and plugs the second through hole 812, an external force pushes the plurality of second pins 83 forward to enable the needle end of each second pin 83 to penetrate through the second through hole 812, enter the plastic part forming cavity and eject an object in the plastic part forming cavity, so that the problem that the plastic part 5 is inconvenient to directly take out in the plastic part forming cavity is solved, the different second pins 83 are located at different positions of the plastic part 5 and eject out at the same time, and the structure of the plastic part 5 is protected from being damaged.

As an optional implementation manner, a cross-shaped groove is formed at the needle head end of the positioning insert needle 3, a cross-shaped end matched with the cross-shaped groove is arranged at the end, connected with the positioning insert needle 3, of the plastic part 5, and the cross-shaped groove and the cross-shaped end are matched with each other to resist the twisting force of the plastic part 5 and the positioning insert needle 3 during injection molding.

As an alternative embodiment, the needle end of the guide insert 4 is provided with a cylindrical groove, and the end of the plastic part 5 connected with the guide insert 4 is provided with a cylindrical end matched with the cylindrical groove.

As an alternative embodiment, the first flow channel 113 has an arc-shaped structure, and the first flow channel 113 adopts an arc-shaped design to extend the length of the flow channel, so that the flow rate can be controlled, and the feeding is smoother.

The manufacturing process of the R angle of the inner cavity of the bent pipe comprises the following specific steps:

step a, injecting a plastic part through a plastic part forming structure;

b, placing the plastic part obtained in the step a in an injection blank molding cavity, and driving the positioning insert pin to move by the sliding structure so as to connect one end of the plastic part with the needle head end of the positioning insert pin for positioning;

c, the sliding structure drives the guide insert pin to move, the guide insert pin is pushed to the position of the other end of the plastic part, the plastic part is connected with the needle head end of the guide insert pin, and at the moment, the two ends of the plastic part are fixed with the positioning insert pin and the guide insert pin respectively;

d, closing the rear module and the front module, injecting a metal material into an injection blank molding cavity through a first flow channel by using an external feeding structure, opening the rear module and the front module after cooling is completed, and taking out the injection blank with the plastic part with the assistance of the ejector pin structure;

and e, soaking the injection blank taken out in the step d in a solution, removing the plastic part after the solution and the plastic part are subjected to chemical reaction, and finally forming a cavity with the same shape as the plastic part in the inner cavity of the injection blank and forming an R angle.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a manufacturing tool at return bend inner chamber R angle, characterized in that, includes rear module (1), anterior module (2), location insert needle (3), direction insert needle (4) and plastic part (5), wherein: the rear module (1) comprises a rear die core (11), a first rear molding groove (111) is formed in the rear die core (11), the front module (2) comprises a front die core (21), a first front molding groove (211) is formed in the front die core (21), the first rear molding groove (111) and the first front molding groove (211) can be enclosed to form an injection blank molding cavity matched with the external shape of an injection blank (6) after the rear die core (11) and the front die core (21) are pressed together, the plastic part (5) can be placed in the injection blank molding cavity, and the external size of the plastic part (5) is matched with the size of an inner cavity of the injection blank (6);

the rear die core (11) is provided with two rear half circular grooves (112) communicated with the first rear forming groove (111), the front die core (21) is provided with two front half circular grooves (212) communicated with the first front forming groove (211), and the two rear half circular grooves (112) and the two front half circular grooves (212) can enclose to form two tubular cavities for the positioning insert needle (3) and the guide insert needle (4) to slide after the rear die core (11) and the front die core (21) are pressed together;

the head ends of the positioning insert pins (3) and the guide insert pins (4) are connected with a group of sliding structures (7) and can move in the tubular cavity under the driving of the sliding structures (7), the needle head ends of the positioning insert pins (3) and the guide insert pins (4) can block the tubular cavity when moving to the limit position farthest away from the plastic part (5) in the tubular cavity, and the needle head ends of the positioning insert pins (3) and the guide insert pins (4) can be detachably connected with one end of the plastic part (5) when moving to the limit position closest to the plastic part (5) in the tubular cavity;

the rear die core (11) is provided with a first flow passage (113), and two ends of the first flow passage (113) are respectively communicated with the injection blank molding cavity and the external feeding structure.

2. The tool for manufacturing the R angle of the inner cavity of the elbow according to claim 1, wherein: the rear module (1) further comprises a rear die body (12), the rear die core (11) is embedded in the rear die body (12) and detachably connected with the rear die body (12), the front module (2) further comprises a front die body (22), and the front die core (21) is embedded in the front die body (22) and detachably connected with the front die body (22).

3. The tool for manufacturing the R angle of the inner cavity of the elbow according to claim 2, wherein: the rear module (1) further comprises a rear template (13) and two support plates (14), the number of the support plates (14) is two, the rear die body (12) and the rear template (13) are connected together through the two support plates (14), the rear module (1) is connected to an external structure through the rear template (13), the front module (2) further comprises a front template (23), the front template (23) is connected with the front die body (22), and the front module (2) is connected to the external structure through the front template (23).

4. The tool for manufacturing the R angle of the inner cavity of the elbow according to claim 1, wherein: the sliding structure (7) comprises a sliding block assembly (71) and two pressing strips (72), the number of the pressing strips (72) is two, a sliding way for the sliding block assembly (71) to slide is formed in the rear die core (11), the pressing strips (72) limit the displacement of the sliding way in the depth direction, the head ends of the positioning insert pins (3) and the guide insert pins (4) are connected with one group of the sliding block assembly (71), and the sliding block assembly (71) is connected with an external structure and moves under the driving of the external structure to drive the positioning insert pins (3) and the guide insert pins (4) to move.

5. The tool for manufacturing the R angle of the inner cavity of the elbow according to claim 1, wherein: rear portion module (1) still includes thimble structure (15), thimble structure (15) are including thimble board (151) and the first thimble (152) of a plurality of, first back shaping groove (111) are every a first through-hole (153) have all been seted up to the corresponding position of first thimble (152), the head end of first thimble (152) is connected on thimble board (151), the syringe needle end of first thimble (152) wears to establish first through-hole (153) department and with first through-hole (153) shutoff, external force promotes forward thimble board (151) can make thimble board (151) orientation back mould benevolence (11) remove so that the syringe needle end of first thimble (152) wears out first through-hole (153) gets into in the injection blank shaping cavity and will the object in the injection blank shaping cavity is ejecting.

6. The tool for manufacturing the R angle of the inner cavity of the elbow according to claim 1, wherein: still include plastic part forming structure (8), plastic part forming structure (8) include behind the plastic part mould (81) and plastic part front mould (82), behind the plastic part mould (81) with plastic part front mould (82) correspond respectively to inlay and establish back mould benevolence (11) with in the front mould benevolence (21), set up behind the second shaping groove (811) on mould (81) behind the plastic part, shaping groove (821) before the second has been seted up on plastic part front mould (82), behind the second shaping groove (811) with can form after enclosing in the shaping groove (821) before the second with plastic part (5) shape assorted plastic part shaping cavity, second runner (114) have been seted up on back mould benevolence (11), the both ends of second runner (114) respectively with plastic part shaping cavity and outside feeding structure are linked together.

7. The tool for manufacturing the R angle of the inner cavity of the elbow according to claim 6, wherein: plastic part forming structure (8) still include a plurality of second thimble (83), forming groove (811) is every behind the second one second thimble (83) correspond the position and all seted up one second through-hole (812), the syringe needle end of second thimble (83) is worn to establish second through-hole (812) department and will second through-hole (812) shutoff, external force promote a plurality of second thimble (83) forward and enable the syringe needle end of second thimble (83) is worn out second through-hole (812) get into in the plastic part forming cavity and will object in the plastic part forming cavity is ejecting.

8. The tool for manufacturing the R angle of the inner cavity of the elbow according to claim 1, wherein: the cross-shaped groove has been seted up to the syringe needle end of location inlay needle (3), plastic part (5) with the one end that location inlay needle (3) are connected be provided with cross-shaped groove matched with cross end.

9. The tool for manufacturing the R angle of the inner cavity of the elbow according to claim 1, wherein: the guide insert needle is characterized in that a cylindrical groove is formed in the needle head end of the guide insert needle (4), and a cylindrical end matched with the cylindrical groove is arranged at one end, connected with the guide insert needle (4), of the plastic part (5).

10. The tool for manufacturing the R angle of the inner cavity of the elbow according to claim 1, wherein: the first flow channel (113) is of an arc-shaped structure.

Images