CN115071078B

CN115071078B - Inclined ejection demoulding structure

Info

Publication number: CN115071078B
Application number: CN202210682431.5A
Authority: CN
Inventors: 王雄伟; 赵恩德
Original assignee: Taizhou Topcolor Technology Co ltd
Current assignee: Taizhou Topcolor Technology Co ltd
Priority date: 2022-06-16
Filing date: 2022-06-16
Publication date: 2024-04-19
Anticipated expiration: 2042-06-16
Also published as: CN115071078A

Abstract

The application relates to an inclined top demoulding structure which comprises a base, wherein a forming cavity for injection molding is formed in the outer wall of the base, inclined walls are arranged on the side walls of the base, which are positioned on two sides of the forming cavity, and the end parts of the two inclined walls, which are close to the cavity opening of the forming cavity, are mutually close to and inclined; a sliding groove communicated with the forming cavity is formed in the inclined wall, a sliding rod is arranged in the sliding groove in a sliding manner, and a spring for driving the end part of the sliding rod, which is far away from the forming cavity, to protrude out of the inclined wall is arranged in the sliding groove; when the end part of the sliding rod, which is close to the forming cavity, enters the forming cavity, the sliding rod is far away from the forming cavity and is positioned in the sliding groove; when the end part of the sliding rod far away from the forming cavity protrudes into the inclined wall, the end part of the sliding rod close to the forming cavity is separated from the forming cavity. Through setting up inclined wall, spout, slide bar and spring, make the product only need a drawing of patterns process can break away from, improve production efficiency, and need not to increase extra driving piece, energy-concerving and environment-protective.

Description

Inclined ejection demoulding structure

Technical Field

The application relates to the field of injection molds, in particular to an inclined ejection demolding structure.

Background

The automobile fuel tank cap is used for protecting the fuel tank and improving the safety performance of an automobile.

The utility model patent with the bulletin number of CN215752797U discloses a motorcycle oil tank protection device, which is used for protecting an oil tank, wherein an oil tank cover is arranged on the oil tank and comprises a first protection piece and a second protection piece, the first protection piece and the second protection piece are both arranged on the oil tank, a first notch is arranged on the first protection piece, a second notch is arranged on the second protection piece, when the first protection piece and the second protection piece are connected together, the first notch and the second notch are combined to form a first opening above the oil tank cover, a first connecting piece and a first fixing part for mounting the first protection piece on a motorcycle are arranged on the first protection piece, a second connecting piece and a second fixing part for mounting the second protection piece on the motorcycle are arranged on the second protection piece, and the first connecting piece is connected with the second connecting piece.

Referring to fig. 1 of the specification of the above patent, the oil tank protection device is provided with mounting holes on a first fixing portion and a second fixing portion. The round hole is formed after the product is molded, a round rod extends into the round hole in the actual injection molding process, the product is convenient to mold, and when the demolding direction is inconsistent with the radial direction of the round hole, the mold in the related art needs a two-way demolding mechanism, so that the round rod is separated from the round hole, and the product is separated from the movable mold, and the demolding is inconvenient.

Disclosure of Invention

In order to facilitate demolding of a product with holes, the application provides an inclined top demolding structure.

The application provides an inclined top demoulding structure, which adopts the following technical scheme:

The inclined top demoulding structure comprises a base, wherein a forming cavity for injection molding is formed in the outer wall of the base, inclined walls are arranged on the side walls of the base, which are positioned on two sides of the forming cavity, and the end parts of the two inclined walls, which are close to the cavity opening of the forming cavity, are mutually close to and inclined; the inclined wall is provided with a sliding groove communicated with the forming cavity, a sliding rod is arranged in the sliding groove in a sliding manner, and a spring for driving the end part of the sliding rod, which is far away from the forming cavity, to protrude out of the inclined wall is arranged in the sliding groove;

When the end part of the sliding rod, which is close to the forming cavity, enters the forming cavity, the end part of the sliding rod, which is far away from the forming cavity, is positioned in the sliding groove; when the end part of the sliding rod far away from the forming cavity protrudes into the inclined wall, the end part of the sliding rod close to the forming cavity is separated from the forming cavity.

By adopting the technical scheme, the inclined ejection demoulding structure is arranged on one side of the fixed mould facing the movable mould, the movable mould is provided with the inclined plane matched with the inclined wall, when the fixed mould is closed, the inclined plane on the movable mould gradually approaches to the inclined wall until the inclined wall is attached, the end part of the sliding rod protruding out of the sliding groove is abutted against the spring force to completely enter the sliding groove, so that the end part of the sliding rod is positioned in the forming cavity, and a hole or a groove is formed at the position of the sliding rod after the product is formed, so that the product required by people is obtained;

when the movable die and the fixed die are separated, the spring drives the sliding rod to slide towards the direction away from the forming cavity, so that the end part of the sliding rod is separated from the forming cavity, the sliding rod is not easy to limit the demolding of the product, and the demolding is convenient; the inclined top demoulding structure can demould a product only by one demoulding process; and the sliding and resetting of the sliding rod are realized through the cooperation of the simple inclined plane and the inclined wall and the spring, and an additional motor or an air cylinder is not required to be used for driving the sliding rod to slide, so that the production cost is low and the structure is simple.

Optionally, the end face of the sliding rod far away from the molding cavity is an abutting inclined plane for abutting against the movable die or the fixed die, and the abutting inclined plane is parallel to the inclined wall.

By adopting the technical scheme, the inclined plane on the movable die is in surface sliding contact with the sliding rod through the abutting inclined plane, so that the abutting force of the movable die and the sliding rod on the unit area is reduced, and the movable die is not easy to wear. Meanwhile, the sliding rod slides more stably by increasing the contact area.

Optionally, the slide bar includes a slide section of thick bamboo, sets up in the loop bar in the slide section of thick bamboo and sets up the ejector pin in the loop bar, loop bar and ejector pin are close to the tip of shaping die cavity and are used for getting into in the shaping die cavity, leave the shaping clearance between ejector pin outer wall and the loop bar inner wall, the shaping clearance is located ejector pin and loop bar towards the tip of shaping die cavity, shaping clearance and shaping cavity intercommunication, the tip that shaping die cavity was kept away from to loop bar and ejector pin is located a slide section of thick bamboo inner chamber.

By adopting the technical scheme, the injection molded product is provided with the tubular connecting ports in the circumferential direction of the holes by arranging the molding gaps, so that the injection molded product is more convenient to use, the sliding rod is split into the sliding barrel, the sleeve rod and the ejector rod, the molding gaps can be obtained by arranging the annular grooves on the inner wall of the sleeve rod and the outer wall of the end part of the ejector rod, and the molding gaps are convenient to process; meanwhile, the end parts of the sleeve rod and the ejector rod, which are far away from the forming cavity, are completely positioned in the sliding cylinder, so that the movable mould only impacts the sliding cylinder during mould closing and is not contacted with the sleeve rod and the ejector rod, and the sleeve rod and the ejector rod are not easy to deform.

Optionally, be provided with the rotation subassembly that drives the ejector pin at loop bar internal rotation in the smooth section of thick bamboo, rotation subassembly includes first gear, second gear, drive bevel gear and driven bevel gear, offer the gliding tooth's socket of confession first gear on the spout inner wall, be provided with the tooth portion with first gear engagement in the tooth's socket, the mounting groove with tooth's socket intercommunication has been offered to smooth section of thick bamboo inner wall, first gear rotates to be connected in the mounting groove, the second gear rotates to be connected in smooth section of thick bamboo inner wall, second gear and first gear engagement, drive bevel gear and second gear coaxial fastening, the tip and the driven bevel gear coaxial fastening of shaping die cavity are kept away from to the ejector pin, drive bevel gear and driven bevel gear engagement.

By adopting the technical scheme, when the sliding barrel slides in the sliding groove, the first gear rotates through the tooth part to drive the second gear to rotate, and because the driving bevel gear and the second gear are coaxially fixed, the driving bevel gear also rotates when the second gear rotates, so that the driven bevel gear meshed with the driving bevel gear is driven to rotate, and finally the driven bevel gear drives the ejector rod to rotate; because of the arrangement of the forming gap, the contact area between the ejector rod and the loop bar and the product is increased, so that adhesion is easy to occur during demolding, the product is easy to damage, and the product is unqualified; through rotating the ejector rod, when demoulding, the ejector rod rotates and withdraws from the tubular connecting port of the product, so that the tubular connecting port is not easy to damage, the product is kept intact, and the qualification rate of the product is improved.

Optionally, the oil duct has been seted up on the base, the oil duct both ends are oil feed end and play oily end, the oil feed end is located the top of spout, play oily end downwardly extending runs through slide cylinder and loop bar, when the spring drives the slide bar and breaks away from in the shaping die cavity, it is towards the lateral wall near the ejector pin tip of shaping die cavity to go out oily end.

Through adopting above-mentioned technical scheme, let in lubricating oil in the oil duct, the oil outlet runs through slide cylinder and loop bar, and oil in the oil duct leads to the ejector pin outer wall, lubricates the ejector pin outer wall, makes the ejector pin conveniently rotate, and the ejector pin in rotating the in-process, can drive fluid flow direction ejector pin on being close to the tip of shaping die cavity, and the existence of fluid makes the ejector pin tip be difficult for with the product adhesion, makes the product drawing of patterns convenient.

Optionally, be provided with the locating wall on the slide inner wall, be provided with the locating piece on the locating wall, the locating piece, the loop bar outer wall coaxial fixed with the holding ring, the constant head tank that supplies the locating piece grafting to get into is seted up towards the lateral wall of shaping die cavity to the holding ring, when the locating piece is located the constant head tank, the oil duct on the slide communicates with the oil duct on the slide.

Through adopting above-mentioned technical scheme, setting of locating wall, holding ring, constant head tank and locating piece makes things convenient for the alignment of the oil duct on the two when making the loop bar install in the slide, makes the oil duct lead to the outer wall of ejector pin smoothly and lubricates.

Optionally, a mounting washer is arranged between the inner wall of the sliding cylinder and the loop bar, and the inner wall of the sliding cylinder and the loop bar are fixed through interference fit of the mounting washer.

Through adopting above-mentioned technical scheme, the installation packing ring has certain elasticity, makes loop bar outer wall and smooth section of thick bamboo inner wall support tightly fixed, need not to use accessories such as bolt to fix, makes loop bar and smooth section of thick bamboo fixed convenience.

Optionally, the ejector rod and the loop bar are rotatably connected through a bearing.

By adopting the technical scheme, the bearing enables the ejector rod to rotate conveniently, and the rotation smoothness of the ejector rod is further improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the inclined wall, the sliding groove, the sliding rod and the spring, the product can be separated only by one demolding process, the production efficiency is improved, and an additional driving piece is not required to be added, so that the product is energy-saving and environment-friendly;

2. By arranging the first gear, the second gear, the driving bevel gear and the driven bevel gear, demolding is not easy to adhere, and the product qualification rate is improved;

3. Through setting up the oil duct, make the ejector pin conveniently rotate, and the ejector pin tip is difficult for with the product adhesion, makes the product drawing of patterns convenient.

Drawings

Fig. 1 is an overall schematic view of a pitched roof stripping structure of example 1 of the present application.

Fig. 2 is a cross-sectional view of fig. 1 taken along line A-A.

Fig. 3 is an enlarged view at B of fig. 2.

Fig. 4 is a cross-sectional view of the pitched roof stripping structure of example 2.

Fig. 5 is an enlarged view at C of fig. 4.

Reference numerals illustrate: 1. a base; 11. a molding cavity; 111. a product; 12. an inclined wall; 13. a chute; 131. a first limiting surface; 132. the second limiting surface; 2. a slide bar; 21. a slide cylinder; 211. abutting the inclined plane; 22. a loop bar; 221. a ring groove; 222. a bearing; 23. a push rod; 24. forming a gap; 3. a spring; 4. a gasket; 5. a rotating assembly; 51. a first gear; 52. a second gear; 53. a drive bevel gear; 54. a driven bevel gear; 6. tooth slots; 7. a mounting groove; 8. an oil passage; 81. an oil inlet end; 82. an oil outlet end; 9. a positioning wall; 91. and (5) positioning blocks.

Detailed Description

The application is described in further detail below with reference to fig. 1-5.

Example 1:

The embodiment 1 of the application discloses an inclined top demoulding structure. Referring to fig. 1 and 2, the inclined ejection demoulding structure comprises a base 1, wherein the base 1 is used for being installed on one side of a fixed mould facing a movable mould, and a forming cavity 11 for injection moulding is formed on one side of the base 1 facing the movable mould. After the fixed die of the movable die is clamped, the molding cavity 11 is used for injection molding, and after the product 111 is molded, the die is opened, and the demolding direction of the product 111 is the direction close to the movable die.

Referring to fig. 2, the side walls of the base 1 on both sides of the molding cavity 11 are inclined walls 12, and the arrangement direction between the inclined walls 12 is perpendicular to the demolding direction of the product 111. The two inclined walls 12 are obliquely arranged, and the ends of the two inclined walls 12 close to the cavity mouth of the forming cavity 11 are mutually inclined, namely, the two inclined walls 12 are mutually inclined towards the direction of approaching the movable die. The movable mould is provided with an inclined plane matched with the inclined wall 12, and when the mould is closed, the inclined wall 12 is attached to the inclined plane wall on the movable mould.

Referring to fig. 2, two inclined walls 12 are provided with a chute 13, and the chute 13 communicates with the molding cavity 11. The sliding groove 13 is internally provided with a sliding rod 2 in a sliding manner, the sliding rod 2 comprises a sliding barrel 21, a sleeve rod 22 and a push rod 23 which are coaxially connected, the sleeve rod 22 is fixed in the sliding barrel 21, and the push rod 23 is arranged in the sleeve rod 22 in a penetrating manner.

Referring to fig. 3, a forming gap 24 is left between the outer wall of the ejector rod 23 and the inner wall of the sleeve rod 22, the forming gap 24 is positioned at the end parts of the ejector rod 23 and the sleeve rod 22 facing the forming cavity 11, the forming gap 24 extends along the peripheral direction of the ejector rod 23, and the forming gap 24 is communicated with the forming cavity 11. The forming gap 24 is provided to form a tubular connection port in the product 111.

Referring to fig. 2 and 3, when the slide bar 2 slides in the slide groove 13, the sleeve 22 and the ejector 23 enter or leave the molding cavity 11 toward the end of the molding gap 24. The end of the loop bar 22 and the ejector bar 23 remote from the forming gap 24 extends to the middle of the slide 21.

Referring to fig. 2, a spring 3 is mounted in the chute 13 to urge the end of the slide bar 2 away from the forming cavity 11 out of the chute 13. The inner wall of the chute 13 is provided with a first limiting surface 131 facing the inclined wall 12, the outer wall of the slide cylinder 21 is provided with a second limiting surface 132 facing the first limiting surface 131, the outer wall of the slide cylinder 21 is sleeved with the spring 3, the spring 3 is positioned between the first limiting surface 131 and the second limiting surface 132, and two ends of the spring 3 are fixed with the first limiting surface 131 and the second limiting surface 132.

Referring to fig. 2, the end surface of the slide cylinder 21 far from the molding cavity 11 is an abutment inclined surface 211, the abutment inclined surface 211 and the inclined wall 12 are arranged in parallel, when the movable mold approaches the fixed mold, the inclined surface on the movable mold is firstly abutted against the abutment inclined surface 211, the abutment inclined surface 211 increases the abutment area, and the sliding stability of the slide cylinder 21 is improved.

The implementation principle of the inclined top demoulding structure of the embodiment 1 of the application is as follows: when the movable die and the fixed die are separated, the spring 3 drives the end part of the slide bar 2, which is far away from the forming cavity 11, to be positioned on the convex inclined wall 12, and at the moment, the ejector rod 23 and the loop bar 22 are separated from the forming cavity 11 towards the end part of the forming cavity 11; when the die is closed, the movable die is close to the fixed die, the inclined surface on the movable die is firstly abutted against the abutting inclined surface 211, the sliding rod 2 is jacked into the sliding groove 13, when the die is completely closed, the inclined surface on the movable die is attached to the inclined wall 12, the sliding rod 2 is completely positioned in the sliding groove 13, the ejector rod 23 and the sleeve rod 22 face to the end part of the forming cavity 11 and enter the forming cavity 11, and then injection molding is carried out to form a required product 111. During demolding, the movable mold and the fixed mold are separated, and the spring 3 drives the slide rod 2 to separate from the forming cavity 11, so that the product 111 is convenient to demold.

Example 2:

Referring to fig. 4 and 5, the difference between the present embodiment 2 and embodiment 1 is that the inner wall of the sleeve 22 is provided with a ring groove 221, a bearing 222 is installed in the ring groove 221, and the ejector rod 23 is rotatably connected in the sleeve 22 through the bearing 222.

Referring to fig. 4 and 5, a washer 4 is fixed to the outer wall of the end of the rod 22 away from the molding cavity 11, the washer 4 is made of rubber, and has a certain deformability, and the rod 22 is fixed in the slide 21 by interference fit of the washer 4.

Referring to fig. 5, a rotation assembly 5 for driving the push rod 23 to rotate is installed in the slide cylinder 21, and the rotation assembly 5 includes a first gear 51, a second gear 52, a driving bevel gear 53, and a driven bevel gear 54. The inner wall of the chute 13 is provided with a tooth slot 6, and the length direction of the tooth slot 6 is the same as the sliding direction of the sliding cylinder 21. The tooth space 6 is internally fixed with a tooth part, the end part of the first gear 51 is positioned in the tooth space 6, and the first gear 51 is meshed with the tooth part.

Referring to fig. 4 and 5, the inner wall of the slide cylinder 21 is provided with a mounting groove 7 communicating with the tooth slot 6, and the first gear 51 is rotatably connected to the mounting groove 7. A second gear 52 is rotatably connected to the inner wall of the slide 21, and the second gear 52 is meshed with the first gear 51. The drive bevel gear 53 is coaxially fixed to the second gear 52, the driven bevel gear 54 is coaxially fixed to the end of the jack 23 remote from the molding cavity 11, and the driven bevel gear 54 is meshed with the drive bevel gear 53.

Referring to fig. 4, an oil duct 8 is formed on the base 1, two ends of the oil duct 8 are an oil inlet end 81 and an oil outlet end 82, the end of the oil inlet end 81 extends to the inclined wall 12 and is located above the chute 13, the oil outlet end 82 extends downward into the chute 13, the oil outlet end 82 penetrates through the slide cylinder 21 and the sleeve rod 22, and when the slide rod 2 is far away from the forming cavity 11, the oil outlet end 82 is led to the outer wall of the ejector rod 23 close to the end of the forming cavity 11.

Referring to fig. 5, a positioning wall 9 facing away from the molding cavity 11 is formed on the inner wall of the slide 21, and a positioning block 91 is fixed to the positioning wall 9. The outer wall of the sleeve rod 22 is coaxially fixed with a positioning ring, one side of the positioning ring facing the positioning wall 9 is provided with a positioning groove for the positioning block 91 to be inserted and taken in, and when the positioning block 91 is inserted and taken in the positioning groove, the sleeve rod 22 is communicated with the oil duct 8 on the sliding cylinder 21.

The implementation principle of the inclined top demoulding structure of the embodiment 2 of the application is as follows: when the slide bar 2 slides in the slide groove 13, the first gear 51 rotates to enable the second gear 52 and the driving bevel gear 53 to rotate, and the driving bevel gear 53 drives the driven bevel gear 54 and the ejector rod 23 to rotate; during demolding, the outer wall of the ejector rod 23 and the inner wall of the sleeve rod 22 are attached to the product 111, so that the large contact area is achieved, the ejector rod 23 is not easy to adhere to the product 111 by driving the ejector rod 23 to rotate and demolding, and the product 111 is not easy to damage in the demolding process. The oil is coated on the outer wall of the ejector rod 23 through the oil duct 8, so that the ejector rod 23 is convenient to rotate, and meanwhile, the end part of the ejector rod 23 enters the molding cavity 11 after being coated with the oil, so that the end part of the ejector rod 23 is not easy to adhere to the product 111.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. The utility model provides a roof to one side demoulding structure which characterized in that: the injection molding device comprises a base (1), wherein a molding cavity (11) for injection molding is formed in the outer wall of the base (1), inclined walls (12) are arranged on the side walls of the base (1) and positioned on two sides of the molding cavity (11), and the end parts, close to the cavity opening of the molding cavity (11), of the two inclined walls (12) are inclined towards each other; a sliding groove (13) communicated with the forming cavity (11) is formed in the inclined wall (12), a sliding rod (2) is arranged in the sliding groove (13) in a sliding mode, and a spring (3) for driving the end portion of the sliding rod (2) away from the forming cavity (11) to protrude out of the inclined wall (12) is arranged in the sliding groove (13); when the end part of the sliding rod (2) close to the forming cavity (11) enters the forming cavity (11), the end part of the sliding rod (2) far away from the forming cavity (11) is positioned in the sliding groove (13); when the end part of the sliding rod (2) far away from the forming cavity (11) protrudes into the inclined wall (12), the end part of the sliding rod (2) close to the forming cavity (11) is separated from the forming cavity (11);

The end face of the sliding rod (2) far away from the forming cavity (11) is an abutting inclined surface (211) for abutting against the movable die or the fixed die, and the abutting inclined surface (211) is parallel to the inclined wall (12);

The sliding rod (2) comprises a sliding cylinder (21), a sleeve rod (22) arranged in the sliding cylinder (21) and a push rod (23) arranged in the sleeve rod (22), wherein the ends of the sleeve rod (22) and the push rod (23) close to a forming cavity (11) are used for entering the forming cavity (11), a forming gap (24) is reserved between the outer wall of the push rod (23) and the inner wall of the sleeve rod (22), the forming gap (24) is positioned at the ends of the push rod (23) and the sleeve rod (22) facing the forming cavity (11), the forming gap (24) is communicated with the forming cavity (11), and the ends of the sleeve rod (22) and the push rod (23) far away from the forming cavity (11) are positioned in the inner cavity of the sliding cylinder (21);

The automatic sliding device is characterized in that a rotating assembly (5) for driving an ejector rod (23) to rotate in a sleeve rod (22) is arranged in the sliding barrel (21), the rotating assembly (5) comprises a first gear (51), a second gear (52), a driving bevel gear (53) and a driven bevel gear (54), tooth grooves (6) for enabling the first gear (51) to slide are formed in the inner wall of the sliding chute (13), tooth parts meshed with the first gear (51) are formed in the tooth grooves (6), mounting grooves (7) communicated with the tooth grooves (6) are formed in the inner wall of the sliding barrel (21), the first gear (51) is rotationally connected in the mounting grooves (7), the second gear (52) is rotationally connected to the inner wall of the sliding barrel (21), the second gear (52) is meshed with the first gear (51), the driving bevel gear (53) and the second gear (52) are coaxially fixed, and the end parts, far away from a forming cavity (11), of the ejector rod (23) are coaxially fixed with the driven bevel gear (54), and the driving bevel gear (53) and the driven bevel gear (54) are meshed with the driven bevel gear (54).

The base is provided with an oil duct (8), two ends of the oil duct (8) are an oil inlet end (81) and an oil outlet end (82), the oil inlet end (81) is positioned above the chute (13), the oil outlet end (82) extends downwards and penetrates through the sliding cylinder (21) and the sleeve rod (22), and when the spring (3) drives the sliding rod (2) to be separated from the forming cavity (11), the oil outlet end (82) faces to the side wall close to the end part of the ejector rod (23) of the forming cavity (11);

The locating device is characterized in that a locating wall (9) is arranged on the inner wall of the sliding cylinder (21), a locating block (91) is arranged on the locating wall (9), a locating ring is coaxially fixed on the outer wall of the sleeve rod (22), a locating groove for the locating block (91) to be inserted and enter is formed in the locating ring towards the side wall of the forming cavity (11), and when the locating block (91) is located in the locating groove, an oil duct (8) on the sliding cylinder (21) is communicated with the oil duct (8) on the locating cylinder.

2. The pitched roof demolding structure according to claim 1, wherein: an installation gasket (4) is arranged between the inner wall of the sliding cylinder (21) and the loop bar (22), and the inner wall of the sliding cylinder (21) and the loop bar (22) are fixed through interference fit of the installation gasket (4).

3. The pitched roof demolding structure according to claim 1, wherein: the ejector rod (23) is rotatably connected with the sleeve rod (22) through a bearing (222).