CN115071078A

CN115071078A - Pitched roof demoulding structure

Info

Publication number: CN115071078A
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: 2022-09-20
Anticipated expiration: 2042-06-16
Also published as: CN115071078B

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, the side walls of the base, which are positioned at two sides of the forming cavity, are inclined walls, and the end parts, close to the cavity opening of the forming cavity, of the two inclined walls are mutually close to and inclined; the inclined wall is provided with a sliding chute communicated with the forming cavity, a sliding rod is arranged in the sliding chute in a sliding mode, and a spring for driving the end part, far away from the forming cavity, of the sliding rod to protrude out of the inclined wall is arranged in the sliding chute; when the end part of the sliding rod, which is close to the molding cavity, enters the molding cavity, the sliding rod is far away from the molding cavity and is positioned in the sliding groove; when the end of the slide rod far away from the molding cavity protrudes into the inclined wall, the end of the slide rod close to the molding cavity is separated from the molding cavity. Through setting up skew wall, spout, slide bar and spring, make the product only need drawing of patterns process can break away from once, improve production efficiency, and need not to increase extra driving piece, energy-concerving and environment-protective.

Description

Pitched roof demoulding structure

Technical Field

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

Background

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

The utility model discloses a grant utility model patent with bulletin number CN215752797U discloses a motorcycle oil tank protector, be used for the protection oil tank, be equipped with the oil tank lid on the oil tank, including first protection piece and second protection piece, first protection piece and second protection piece are all installed on the oil tank, be equipped with first breach on the first protection piece, be equipped with the second breach on the second protection piece, when first protection piece and second protection piece link together, first breach and the combination of second breach form the first opening that is located the oil tank lid top, be equipped with first connecting piece on the first protection piece and be used for installing the first fixed part on the motorcycle with first protection piece, be equipped with the second connecting piece on the second protection piece and be used for installing the second protection piece on the motorcycle the second fixed part, first connecting piece and second connecting piece are connected.

Referring to fig. 1 of the specification of the above patent, the oil tank protection device is provided with mounting holes on the first fixing portion and the second fixing portion. This product forms a round hole after moulding plastics, and it is downthehole that the actual in-process of moulding plastics has a round bar to stretch into the round hole, the shaping of the product of being convenient for, and when drawing of patterns direction and the radial nonconformity of round hole, mould among the correlation technique needs two demoulding mechanism, just can make round bar and round hole separation and product and movable mould separation, leads to the drawing of patterns inconvenient.

Disclosure of Invention

In order to facilitate demoulding of products with holes, the application provides an inclined top demoulding structure.

The application provides a pitched roof demoulding structure adopts following technical scheme:

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

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

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

when the movable mold is separated from the fixed mold, the spring drives the sliding rod to slide towards the direction far away from the molding cavity, so that the end part of the sliding rod is separated from the molding cavity, the sliding rod is not easy to perform demolding limit on a product, and demolding is convenient; the inclined top demoulding structure can demould products only by one demoulding process; and the sliding and resetting of the sliding rod are realized through the simple matching of the inclined plane and the inclined wall and the spring, the sliding rod is driven to slide without using an additional motor or an air cylinder, the production cost is low, and the structure is simple.

Optionally, the end surface of the slide bar, which is far away from the molding cavity, is an abutting inclined surface for abutting against the movable mold or the fixed mold, and the abutting inclined surface 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 by abutting the inclined plane, so that the abutting force on the unit area of the movable die and the sliding rod is reduced, and the movable die is not easy to wear. Meanwhile, the sliding of the sliding rod is more stable by increasing the contact area.

Optionally, the slide bar includes the slide cartridge, sets up loop bar in the slide cartridge and sets up the ejector pin in the loop bar, the tip that loop bar and ejector pin are close to the shaping chamber is used for getting into the shaping intracavity, leave the shaping clearance between ejector pin outer wall and the loop bar inner wall, the shaping clearance is located the tip of ejector pin and loop bar orientation shaping chamber, shaping clearance and shaping chamber intercommunication, the tip that the shaping chamber was kept away from to loop bar and ejector pin is located the slide cartridge inner chamber.

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

Optionally, a rotating assembly for driving the ejector rod to rotate in the loop bar is arranged in the sliding cylinder, the rotating assembly includes a first gear, a second gear, a driving bevel gear and a driven bevel gear, a tooth slot for the first gear to slide is formed in the inner wall of the sliding slot, a tooth portion meshed with the first gear is arranged in the tooth slot, a mounting groove communicated with the tooth slot is formed in the inner wall of the sliding cylinder, the first gear is rotatably connected in the mounting groove, the second gear is rotatably connected to the inner wall of the sliding cylinder, the second gear is meshed with the first gear, the driving bevel gear and the second gear are coaxially fixed, the end portion, far away from the molding cavity, of the ejector rod is coaxially fixed to the driven bevel gear, and the driving bevel gear is meshed with the driven bevel gear.

By adopting the technical scheme, when the sliding cylinder 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; due to the arrangement of the forming gap, the contact area between the ejector rod and the product and the contact area between the loop bar and the product are 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 pin setting for during the drawing of patterns, the ejector pin is rotated the limit and is withdrawed from in the tubulose connecting opening of product simultaneously, makes the tubulose connecting opening not fragile, makes the product keep intact, improves the qualification rate of product.

Optionally, the oil duct has been seted up on the base, the oil duct both ends are oil feed end and an oil outlet end, the oil feed end is located the top of spout, oil outlet end downwardly extending runs through slide cartridge and loop bar, works as when the spring orders about the slide bar and breaks away from the shaping intracavity, the lateral wall of the ejector pin tip that the oil outlet end orientation is close to the shaping chamber.

Through adopting above-mentioned technical scheme, let in lubricating oil in the oil duct, go out oil end and run through slide cartridge and loop bar, oil accesss to the ejector pin outer wall in the oil duct, lubricates the ejector pin outer wall, makes the ejector pin conveniently rotate, and the ejector pin is rotating the in-process, can drive fluid flow direction ejector pin with fluid on being close to the tip in shaping chamber, the existence of fluid makes the ejector pin tip be difficult for with the product adhesion, make the product drawing of patterns convenient.

Optionally, be provided with the locating wall on the slide cartridge inner wall, be provided with the locating piece on the locating wall, the locating piece, the coaxial holding ring that is fixed with of loop bar outer wall, the constant head tank that supplies the locating piece grafting to get into is seted up towards the lateral wall of shaping chamber to the constant head tank, when the locating piece is located the constant head tank, oil duct on the slide cartridge and the oil duct intercommunication on the location section of thick bamboo.

Through adopting above-mentioned technical scheme, the setting of location wall, holding ring, constant head tank and locating piece makes the loop bar when installing in the slide cartridge, makes things convenient for the alignment of the oil duct on the two, 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 in an interference fit manner through the mounting washer.

By adopting the technical scheme, the mounting washer has certain elasticity, so that the outer wall of the loop bar and the inner wall of the sliding barrel are tightly abutted and fixed without using accessories such as bolts and the like, and the loop bar and the sliding barrel are convenient to fix.

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

Through adopting above-mentioned technical scheme, the bearing makes the ejector pin rotate conveniently, further improves the rotation smoothness nature of ejector pin.

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, an additional driving piece is not required to be added, and the energy-saving and environment-friendly effects are achieved;

2. by arranging the first gear, the second gear, the driving bevel gear and the driven bevel gear, the demoulding is not easy to adhere, and the product percent of pass 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, make the product drawing of patterns convenient.

Drawings

Fig. 1 is an overall schematic view of a pitched roof mold release structure according to example 1 of the present application.

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

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

Fig. 4 is a sectional view of the pitched roof mold release structure of example 2.

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

Description of reference numerals: 1. a base; 11. a molding cavity; 111. producing a product; 12. a sloped wall; 13. a chute; 131. a first limit surface; 132. a second limiting surface; 2. a slide bar; 21. a slide cylinder; 211. abutting against the inclined plane; 22. a loop bar; 221. a ring groove; 222. a bearing; 23. a top rod; 24. a forming 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. a tooth socket; 7. mounting grooves; 8. an oil duct; 81. an oil inlet end; 82. an oil outlet end; 9. a positioning wall; 91. and (5) positioning the blocks.

Detailed Description

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

Example 1:

the embodiment 1 of the application discloses a pitched roof demoulding structure. Referring to fig. 1 and 2, the pitched roof demoulding structure comprises a base 1, wherein the base 1 is used for being installed on one side of a fixed die facing a movable die, and a forming cavity 11 for injection molding is formed in one side of the base 1 facing the movable die. After the movable mold and the fixed mold are assembled, the molding cavity 11 is used for injection molding, when the product 111 is molded, the mold is opened, and the demolding direction of the product 111 is close to the movable mold.

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 opening of the molding cavity 11 are obliquely close to each other, i.e. the two inclined walls 12 are obliquely close to each other in the direction close to the movable mold. The movable mould is provided with an inclined surface matched with the inclined wall 12, and the inclined wall 12 is attached to the inclined wall on the movable mould during mould closing.

Referring to fig. 2, the two inclined walls 12 are provided with sliding grooves 13, and the sliding grooves 13 are communicated with the molding cavity 11. A sliding rod 2 is arranged in the sliding groove 13 in a sliding mode, the sliding rod 2 comprises a sliding cylinder 21, a loop bar 22 and a push rod 23 which are coaxially connected, the loop bar 22 is fixed in the sliding cylinder 21, and the push rod 23 penetrates through the loop bar 22.

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 loop bar 22, the forming gap 24 is located at the end of the ejector rod 23 and the loop bar 22 facing the forming cavity 11, the forming gap 24 extends along the outer circumference of the ejector rod 23, and the forming gap 24 is communicated with the forming cavity 11. The provision of the forming gap 24 results in a tubular connecting opening in the product 111.

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

With reference to fig. 2, inside the runner 13 there is mounted a spring 3 which urges the end of the slide 2 remote from the forming chamber 11 to protrude out of the runner 13. The inner wall of the sliding chute 13 is formed with a first limiting surface 131 facing the inclined wall 12, the outer wall of the sliding barrel 21 is formed with a second limiting surface 132 facing the first limiting surface 131, the spring 3 is sleeved on the outer wall of the sliding barrel 21, the spring 3 is located 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 away from the molding cavity 11 is an abutting inclined surface 211, the abutting inclined surface 211 and the inclined wall 12 are arranged in parallel, when the movable mold is close to the fixed mold, the inclined surface on the movable mold abuts against the abutting inclined surface 211 first, the abutting inclined surface 211 increases the abutting area, and the sliding stability of the slide cylinder 21 is improved.

The implementation principle of an oblique top demoulding structure in 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 rod 2 far away from the molding 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 molding cavity 11 towards the end part of the molding cavity 11; when the die is completely closed, the inclined surface on the movable die is attached to the inclined wall 12, the slide rod 2 is completely positioned in the sliding groove 13, the ejector rod 23 and the loop bar 22 enter the forming cavity 11 towards the end part of the forming cavity 11, and then injection molding is performed to form the required product 111. During demoulding, the movable mould is separated from the fixed mould, and the spring 3 drives the sliding rod 2 to be separated from the forming cavity 11, so that the product 111 is convenient to demould.

Example 2:

referring to fig. 4 and 5, the difference between the embodiment 2 and the embodiment 1 is that a ring groove 221 is formed on the inner wall of the loop bar 22, a bearing 222 is installed in the ring groove 221, and the push rod 23 is rotatably connected in the loop bar 22 through the bearing 222.

Referring to fig. 4 and 5, a gasket 4 is circumferentially fixed on an outer wall of an end portion of the loop bar 22 away from the forming cavity 11, the gasket 4 is made of rubber and has a certain deformation capability, and the loop bar 22 is fixed in the slide cylinder 21 through interference fit of the gasket 4.

Referring to fig. 5, a rotation assembly 5 for driving the ram 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 sliding chute 13 is provided with a tooth groove 6, and the length direction of the tooth groove 6 is the same as the sliding direction of the sliding barrel 21. Teeth are fixed in the tooth grooves 6, the end of the first gear 51 is positioned in the tooth grooves 6, and the first gear 51 is engaged with the teeth.

Referring to fig. 4 and 5, an installation groove 7 communicating with the tooth groove 6 is formed in the inner wall of the slide cylinder 21, and the first gear 51 is rotatably connected in the installation groove 7. The second gear 52 is rotatably connected to the inner wall of the slide drum 21, and the second gear 52 is engaged with the first gear 51. The driving bevel gear 53 and the second gear 52 are coaxially fixed, the driven bevel gear 54 and the end part of the ejector rod 23 far away from the molding cavity 11 are coaxially fixed, and the driven bevel gear 54 is meshed with the driving bevel gear 53.

Referring to fig. 4, the oil duct 8 is formed in the base 1, an oil inlet end 81 and an oil outlet end 82 are formed at two ends of the oil duct 8, an end portion of the oil inlet end 81 extends to the inclined wall 12 and is located above the sliding groove 13, the oil outlet end 82 extends downward into the sliding groove 13, the oil outlet end 82 penetrates through the sliding cylinder 21 and the loop bar 22, and when the sliding rod 2 is far away from the molding cavity 11, the oil outlet end 82 leads to an outer wall of the end portion of the ejector rod 23 close to the molding cavity 11.

Referring to fig. 5, a positioning wall 9 facing away from the forming cavity 11 is formed on the inner wall of the slide cylinder 21, and a positioning block 91 is fixed on the positioning wall 9. The outer wall of the loop bar 22 is coaxially fixed with a positioning ring, one side of the positioning ring, which faces the positioning wall 9, is provided with a positioning groove for the positioning block 91 to be inserted into, and when the positioning block 91 is inserted into the positioning groove, the loop bar 22 is communicated with the oil duct 8 on the sliding barrel 21.

The principle of implementing the pitched roof demolding structure in embodiment 2 of the application is as follows: when the sliding rod 2 slides in the sliding chute 13, the first gear 51 rotates, so that the second gear 52 and the driving bevel gear 53 rotate, and the driving bevel gear 53 drives the driven bevel gear 54 and the mandril 23 to rotate; during demolding, the outer wall of the ejector rod 23 and the inner wall of the loop bar 22 are both attached to the product 111, a large contact area is achieved, the ejector rod 23 is driven to rotate while demolding is conducted, the ejector rod 23 is not prone to being adhered to the product 111, and the product 111 is not prone to being damaged in the demolding process. The outer wall of the ejector rod 23 is oiled 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 forming cavity 11 after being oiled, so that the end part of the ejector rod 23 is not easy to adhere to a product 111.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a pitched roof 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), the side walls of the base (1) positioned at two sides of the molding cavity (11) are inclined walls (12), and the end parts of the two inclined walls (12) close to the cavity opening of the molding cavity (11) are mutually close to and inclined; the inclined wall (12) is provided with a sliding chute (13) communicated with the forming cavity (11), a sliding rod (2) is arranged in the sliding chute (13) in a sliding mode, and a spring (3) for driving the end portion, far away from the forming cavity (11), of the sliding rod (2) to protrude out of the inclined wall (12) is arranged in the sliding chute (13);

when the end part of the sliding rod (2) close to the molding cavity (11) enters the molding cavity (11), the end part of the sliding rod (2) far away from the molding cavity (11) is positioned in the sliding groove (13); when the end of the sliding rod (2) far away from the forming cavity (11) protrudes out of the inclined wall (12), the end of the sliding rod (2) close to the forming cavity (11) is separated from the forming cavity (11).

2. The pitched roof demoulding structure according to claim 1, wherein: the end face, far away from the molding cavity (11), of the sliding rod (2) is an abutting inclined plane (211) used for abutting against a movable mold or a fixed mold, and the abutting inclined plane (211) is parallel to the inclined wall (12).

3. The pitched roof demoulding structure according to claim 2, wherein: slide bar (2) are including slide cartridge (21), set up loop bar (22) in slide cartridge (21) and set up ejector pin (23) in loop bar (22), the tip that loop bar (22) and ejector pin (23) are close to shaping chamber (11) is used for getting into shaping chamber (11) in, leave shaping clearance (24) between ejector pin (23) outer wall and loop bar (22) inner wall, shaping clearance (24) are located the tip of ejector pin (23) and loop bar (22) orientation shaping chamber (11), shaping clearance (24) and shaping chamber (11) intercommunication, the tip that shaping chamber (11) were kept away from to loop bar (22) and ejector pin (23) is located slide cartridge (21) inner chamber.

4. The pitched roof demoulding structure according to claim 3, wherein: the sliding barrel (21) is internally provided with a rotating component (5) for driving a push rod (23) to rotate in a loop bar (22), the rotating component (5) comprises a first gear (51), a second gear (52), a driving bevel gear (53) and a driven bevel gear (54), the inner wall of the sliding groove (13) is provided with a tooth groove (6) for the first gear (51) to slide, the tooth groove (6) is internally provided with a tooth part meshed with the first gear (51), the inner wall of the sliding barrel (21) is provided with a mounting groove (7) communicated with the tooth groove (6), the first gear (51) is rotatably connected in the mounting groove (7), the second gear (52) is rotatably 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, the end part of the push rod (23) far away from the forming cavity (11) is coaxially fixed with the driven bevel gear (54), the driving bevel gear (53) is meshed with the driven bevel gear (54).

5. The pitched roof demoulding structure according to claim 4, wherein: oil duct (8) have been seted up on the base, oil duct (8) both ends are oil feed end (81) and go out oil end (82), oil feed end (81) are located the top of spout (13), go out oil end (82) downwardly extending and run through slide cartridge (21) and loop bar (22), work as when spring (3) order about slide bar (2) to break away from in shaping chamber (11), go out the lateral wall of oil end (82) orientation ejector pin (23) tip near shaping chamber (11).

6. The pitched roof demoulding structure according to claim 5, wherein: be provided with location wall (9) on slide cartridge (21) inner wall, be provided with locating piece (91) on location wall (9), locating piece (91), loop bar (22) outer wall coaxial fixation has the holding ring, the holding ring sets up the constant head tank that supplies locating piece (91) to peg graft the entering towards the lateral wall that becomes die cavity (11), when locating piece (91) is located the constant head tank, oil duct (8) on oil duct (8) and the location cylinder on oil duct (8) intercommunication on slide cartridge (21).

7. The pitched roof demoulding structure according to claim 4, wherein: a mounting gasket (4) is arranged between the inner wall of the sliding barrel (21) and the loop bar (22), and the inner wall of the sliding barrel (21) and the loop bar (22) are fixed in an interference fit mode through the mounting gasket (4).

8. The pitched roof demoulding structure according to claim 4, wherein: the ejector rod (23) is rotatably connected with the loop bar (22) through a bearing (222).