Half line removing injection molding mold for plastic shell of automobile air conditioner

Abstract

The invention provides an automobile air conditioner plastic shell half line removing injection molding mold which comprises an upper mold, a lower mold, a mold core, a mold core and an angle pin, the mold core and the mold core are both fixed in the upper mold, a mold cavity is formed between the lower mold and the upper mold, a connecting hole is formed in the side wall of the mold core, the end of the mold core abuts against the outer wall of the mold core and blocks the connecting hole, and the angle pin is arranged in the mold cavity. The mold core is provided with a sliding hole communicated with the connecting hole, the angle pin is connected into the sliding hole in a sliding mode, the end of the sliding hole is provided with a connecting inclined face, the inner wall of the sliding hole is provided with a limiting groove, and the length direction of the limiting groove is parallel to the length direction of the sliding hole. And the side wall of the angle pin is fixedly connected with a limiting rod which is slidably connected in the limiting groove, so that the purpose of removing the Haff line is achieved.

Description

Technical Field

[0001] The invention relates to an injection mold, in particular to an injection molding mold for a plastic shell of an automobile air conditioner without half lines. Background Art

[0002] like Figures 1 to 3 As shown, an existing automobile air conditioner plastic housing 1 (hereinafter referred to as housing 1) injection molding mold is provided, and a barb 100 is provided on the housing 1. In order to form the barb 100, a mold core 6 and an inclined pin 8 are required. The mold core 6 is fixed in the upper mold 2, and the inclined pin 8 is slidably connected in the mold core 6. A connecting inclined surface 17 is provided at the end of the mold core 6, and the inclined pin 8 penetrates into the mold core 6.

[0003] After the plastic melt is injected into the cavity, a hook 100 is formed between the end of the inclined pin 8 and the connecting bevel 17. However, the plastic melt will exert pressure on the inclined pin 8 at the same time. The inclined pin 8 is relatively long, so that the inclined pin 8 will be deviated along the mold core 6 to a certain extent. After the shell 1 is formed, a relatively obvious Hough line will be generated at the connection between the inclined pin 8 and the mold core 6, resulting in the problem of poor molding quality of the shell 1. Summary of the invention

[0004] In view of this, the object of the present invention is to provide an injection molding die for removing the half line of a plastic shell of an automobile air conditioner, so as to achieve the purpose of improving the molding quality.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: an injection molding mold for removing the half line of a plastic shell of an automobile air conditioner, comprising an upper mold, a lower mold, a core, a mold core and an inclined pin, the core and the mold core are both fixed in the upper mold, a cavity is formed between the lower mold and the upper mold, a connecting hole is provided on the side wall of the core, the end of the mold core is tightly pressed against the outer wall of the core and blocks the connecting hole, the mold core is provided with a sliding hole connected to the connecting hole, the inclined pin is slidably connected to the sliding hole, a connecting inclined surface is provided at the end of the sliding hole, a limiting groove is provided on the inner wall of the sliding hole, the length direction of the limiting groove is parallel to the length direction of the sliding hole, and a limiting rod slidably connected to the limiting groove is fixedly connected to the side wall of the inclined pin.

[0006] To implement the above technical solution, the upper mold and the lower mold are pressed tightly together, and then the plastic melt is injected into the mold cavity. The limit rod is in contact with the inner wall of the limit groove to limit the relative movement between the inclined pin and the mold core. When the shell is molded, no Hough line will be formed on the surface of the shell. Then, the inclined pin is moved along its own length square and pulled out of the mold core. Then the upper mold and the lower mold are separated, and the shell can be taken out of the mold cavity.

[0007] As a preferred solution of the present invention, the oblique pin includes a forming section, a locking sleeve, a first latch, a second latch, a positioning sleeve, and a sliding section. The forming section is fixedly connected to the limiting rod, the forming section is inserted into the positioning sleeve, the end of the forming section is tightly abutted against the end of the sliding section, the locking sleeve is arranged on the positioning sleeve and the sliding section, the first latch passes through the locking sleeve, the positioning sleeve and the forming section, and the second latch passes through the locking sleeve and the sliding section.

[0008] To implement the above technical solution, the forming section is inserted into the positioning sleeve, and then the end of the forming section is pressed against the end of the sliding section, and then the locking sleeve is arranged on the outside of the positioning sleeve and the sliding section. Finally, the first latch is passed through the locking sleeve, the positioning sleeve and the forming section, and the second latch is passed through the locking sleeve and the sliding section, thereby completing the fixed connection between the forming section and the sliding section; since the oblique pin is processed in multiple stages, the production difficulty can be greatly reduced, and the processing accuracy can be improved at the same time.

[0009] As a preferred solution of the present invention, an inclined block is fixedly connected to one end of the sliding section away from the forming section, a power block is slidably connected to the outer wall of the upper mold, an inclined groove is provided on the power block, the inclined block is slidably connected in the inclined groove, and the power block is driven by a power cylinder.

[0010] To implement the above technical solution, the power cylinder is started, the power block is translated, and the inclined block is moved along the length direction of the inclined slot through the conduction effect of the inclined slot. At the same time, the inclined block drives the sliding section to move, so that the sliding section moves smoothly along its own length direction. During the injection molding process, the power cylinder is started to counteract the pressure on the inclined pin caused by the plastic melt to prevent the inclined pin from retreating.

[0011] As a preferred solution of the present invention, an installation cavity is provided in the molding section, a molding hole connected to the installation cavity is provided at the end of the molding section, the opening of the molding hole faces the connecting inclined surface, a protrusion is slidably connected in the molding hole, a molding groove is provided on the protrusion, the molding section moves toward the direction approaching the molding cavity and the protrusion extends out of the molding hole through the conduction component.

[0012] To implement the above technical solution, the molding section moves toward the direction approaching the cavity, and the protrusion is extended from the molding hole through the conduction component. When the shell is molded, a hook is formed between the core, the mold core and the inclined pin. The protrusion is located in the cavity, and a pit is formed on the side of the protrusion corresponding to the hook. At the same time, the molding groove will form a convex strip on the hook, and the convex strip has a certain anti-slip effect to improve the connection stability between the mating part and the shell; when the shell is connected to the mating part, the protrusion on the mating part can be embedded in the pit to make the connection between the shell and the mating part more stable.

[0013] As a preferred embodiment of the present invention, the transmission component includes a first rack, a second rack, a gear rod, a transmission gear, and a transmission screw. The first rack is fixed to the inner wall of the mold core, the second rack is slidably connected to the installation cavity, the gear rod is rotatably connected to the installation cavity and one end is meshed with the first rack, the other end of the gear rod is meshed with the second rack, the transmission gear is meshed with the second rack and is rotatably connected to the installation cavity, and the transmission screw is fixed on the transmission gear and is threadedly connected to the protrusion.

[0014] To implement the above technical solution, the molding section moves toward the cavity, and the gear rod moves along the length direction of the first rack to rotate the gear rod, so that the gear rod drives the second rack to move, thereby causing the second rack to drive the transmission gear to rotate, and the transmission gear drives the connecting screw to rotate, and through the conduction effect of the thread, the protrusion penetrates into the cavity along the molding hole. During the injection molding process, the plastic melt will generate pressure on the protrusion, and the power support of the connecting screw, the connecting rack and the power cylinder can effectively resist the pressure, so that the protrusion can remain stable during the injection molding process; similarly, when the molding section moves away from the cavity, the protrusion can be retracted into the molding hole.

[0015] As a preferred solution of the present invention, a stripping slope is provided at one end of the projection facing the connecting slope.

[0016] To implement the above technical solution, the stripping slope on the protrusion will form a positioning slope on the undercut, and the setting of the positioning slope can effectively improve the connection stability between the shell and the mating part; in addition, in the process of the molding section moving away from the cavity, the stripping slope is set so that the protrusion moves toward the molding hole, and the protrusion can move along the positioning slope, so that the demolding of the protrusion is smoother.

[0017] As a preferred solution of the present invention, a placement cavity is provided on the inner wall of the mold core, a square groove connected to the placement cavity is provided on the connecting inclined surface, a sliding rod is slidably connected in the placement cavity, and the end of the sliding rod is fixedly connected to a square block slidably connected in the square groove, the molding section moves toward the direction approaching the cavity and the square block extends out of the square groove through the connecting component, and a friction groove is provided on the square block.

[0018] To implement the above technical solution, the molding section is moved toward the direction close to the molding cavity, and the square block is extended from the square groove through the connecting component. When the underhook is formed, a square groove is formed on the guiding slope of the underhook, and a friction protrusion is obtained in the square groove. The square groove corresponds to the square block, and the friction protrusion corresponds to the friction groove. Therefore, when it is necessary to separate the shell from the mating part, the underhook can be pushed to move by contacting the friction protrusion with the fingers. At the same time, when the mating part is connected to the shell, the setting of the square groove reduces the contact area with the mating connection and reduces the friction force, so that the mating part can be connected to the shell more labor-saving.

[0019] As a preferred solution of the present invention, the connecting assembly includes a slider, a first inclined surface, a second inclined surface and a support spring. The slider is slidably connected in the placement cavity and fixedly connected to the forming section. The first inclined surface is opened at the end of the slider, the second inclined surface is opened at the end of the sliding rod and is used to fit with the first inclined surface. One end of the support spring is connected to the sliding rod, and the other end of the support spring is connected to the inner wall of the placement cavity.

[0020] To implement the above technical solution, the molding section is moved toward the direction approaching the cavity, and the slider moves synchronously with the molding section, and a conduction effect is generated by the abutment between the first inclined surface and the second inclined surface, so that the slide rod moves along its own length direction, and the square block moves along the inner wall of the square groove and penetrates into the cavity; when the molding section moves toward the direction away from the cavity, the elastic force of the supporting spring separates the square block from the undercut to achieve demolding; the power cylinder transfers the force from the oblique pin and the slider to the slide rod, so that the square block can resist the pressure exerted on the square block by the plastic melt, so that the square block remains stable during the injection molding process.

[0021] As a preferred solution of the present invention, a limiting block is fixedly connected to the outer wall of the upper mold, and the power block is slidably connected to the limiting block.

[0022] By implementing the above technical solution, when the power cylinder is started, the power block can move more smoothly along the limit block.

[0023] In summary, the present invention has the following beneficial effects: 1. The limiting rod contacts the inner wall of the limiting groove, thereby limiting the movement of the oblique pin, so that no Hough line will be generated on the surface of the molded automobile air conditioner plastic shell; 2. When the oblique pin moves toward the cavity, the convex block and the square block move into the cavity; when the oblique pin moves away from the cavity, the convex block moves into the oblique pin and the square block moves into the mold core, so as to quickly realize demoulding; 3. The protrusion forms a positioning slope on the undercut to make the connection between the housing and the mating parts more stable and tight; 4. The square block forms a square groove on the guiding slope of the undercut, and a friction protrusion is formed in the square groove, which facilitates the connection between the mating part and the undercut and facilitates the undercut to be pushed by fingers to realize the separation of the mating part from the undercut; 5. Since the square block and the convex block are demoulded at the same time, the force on the undercut is more uniform, reducing local stress concentration, thereby reducing the risk of deformation and ensuring the dimensional accuracy and shape of the undercut. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an existing automobile air-conditioning plastic housing; Figure 2 It is a schematic diagram of the existing oblique pin and mold core connection structure; Figure 3 It is a schematic diagram of the existing oblique pin structure; Figure 4 It is a schematic diagram of the external structure of the present invention; Figure 5 A schematic diagram showing the connection structure between the lower die and the shell; Figure 6 A schematic diagram showing the structure of the inverted hook; Figure 7 A schematic diagram of the connection structure between the oblique pin and the mold core embodying the present invention; Figure 8 A schematic diagram of the oblique pin structure of the present invention; Fig. 9 To show the structural diagram of the inclined block; Fig.10 A schematic diagram of the structure of the mold core embodying the present invention; Fig.11 It is a schematic diagram showing the structure of the sliding hole in the mold core; Fig.12 It is a schematic diagram of the connection structure between the mold core and the oblique pin in the present invention; Fig.13 for Fig.12 A magnified image of point A; Fig.14 To illustrate the structural diagram of the installation cavity; Fig.15 This is a schematic structural diagram of the automobile air conditioner plastic housing of the present invention; Fig.16 for Fig.15 Enlarged view of point C.

[0025] Figure numerals: 1, housing; 2, upper mold; 3, lower mold; 4, core; 5, connecting hole; 6, mold core; 7, sliding hole; 8, oblique pin; 9, forming section; 10, locking sleeve; 11, first latch; 12, second latch; 13, positioning sleeve; 14, sliding section; 15, limiting rod; 16, limiting groove; 17, connecting inclined surface; 18, oblique block; 19, power block; 20, oblique groove; 21, power cylinder; 22, limiting block; 23, guide groove; 24, installation cavity; 25, forming hole; 26, convex block; 27. Molding groove; 28. Raised strip; 29. ​​Transmission component; 30. First rack; 31. Second rack; 32. Tooth rod; 33. Transmission gear; 34. Transmission screw; 35. Stripping slope; 36. Positioning slope; 37. Placement cavity; 38. Square groove; 39. Square block; 40. Friction groove; 41. Slide bar; 42. Connecting component; 43. Slider; 44. First slope; 45. Second slope; 46. Support spring; 47. Square groove; 48. Friction protrusion; 100. Underhook. DETAILED DESCRIPTION

[0026] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0027] A half-line-free injection molding mold for a car air-conditioning plastic housing 1 includes an upper mold 2, a lower mold 3, a core 4, a mold core 6, and an inclined pin 8. The core 4 and the mold core 6 are both fixed in the upper mold 2, and a cavity for molding the car air-conditioning plastic housing 1 is formed between the lower mold 3 and the upper mold 2. A connecting hole 5 is provided on the side wall of the core 4, and the end of the mold core 6 is pressed against the outer wall of the core 4 to block the connecting hole 5. A sliding hole 7 connected to the connecting hole 5 is provided in the mold core 6, and the inclined pin 8 is slidably connected in the sliding hole 7.

[0028] The oblique pin 8 includes a forming section 9, a locking sleeve 10, a first latch 11, a second latch 12, a positioning sleeve 13, and a sliding section 14. The forming section 9 is inserted into the positioning sleeve 13, and the end of the forming section 9 is tightly pressed against the end of the sliding section 14. The locking sleeve 10 is sleeved on the positioning sleeve 13 and the sliding section 14. The first latch 11 passes through the locking sleeve 10, the positioning sleeve 13, and the forming section 9, and the second latch 12 passes through the locking sleeve 10 and the sliding section 14, so as to realize a fixed connection between the forming section 9 and the sliding section 14.

[0029] A limiting rod 15 is integrally connected to the side wall of the forming section 9, and the length direction of the limiting rod 15 is parallel to the length direction of the forming section 9. The cross section of the combination of the forming section 9 and the limiting rod 15 is a cross shape.

[0030] A limiting groove 16 is provided on the inner wall of the sliding hole 7 , and the length direction of the limiting groove 16 is parallel to the length direction of the sliding hole 7 . The forming section 9 is slidably connected in the sliding hole 7 , and the limiting rod 15 is slidably connected in the limiting groove 16 .

[0031] A connecting inclined surface 17 is provided at the end of the sliding hole 7 .

[0032] After the upper mold 2 and the lower mold 3 are matched, the plastic melt is injected into the mold cavity to form the housing 1 in the mold cavity, and the molding section 9 is subjected to the pressure of the plastic melt and resists the pressure through the inner wall of the limiting groove 16 and the limiting rod 15, so that the molding section 9 remains stable during the molding process of the housing 1. After the housing 1 is molded, no half line is formed between the molding section 9 and the mold core 6.

[0033] An inclined block 18 is fixedly connected to one end of the sliding section 14 away from the forming section 9, and the cross section of the inclined block 18 is T-shaped. A power block 19 is slidably connected to the outer wall of the upper mold 2, and an inclined groove 20 is provided on the power block 19. The inclined block 18 is slidably connected in the inclined groove 20. The power block 19 is driven by a power cylinder 21, which is an air cylinder and fixed to the outer wall of the upper mold 2.

[0034] A limiting block 22 is fixedly connected to the outer wall of the upper mold 2 . A guide groove 23 with a T-shaped cross section is formed on the limiting block 22 . The power block 19 is slidably connected in the guide groove 23 .

[0035] When the power cylinder 21 is started, the power block 19 moves along the length direction of the guide groove 23, and the inclined block 18 drives the sliding section 14 to move through the conduction effect of the inclined groove 20. At the same time, the sliding section 14 drives the forming section 9 to move smoothly. The forming section 9 and the mold core 6 are both fixed in the form of left and right parts spliced ​​together.

[0036] A mounting cavity 24 is defined in the molding segment 9 , and a molding hole 25 communicating with the mounting cavity 24 is defined at the end of the molding segment 9 . The molding hole 25 is perpendicular to the surface of the molding segment 9 and the opening of the molding hole 25 faces the connecting slope 17 .

[0037] A protrusion 26 is slidably connected in the forming hole 25, and a forming groove 27 is provided on the protrusion 26, and the forming groove 27 is in the shape of a long strip. The forming section 9 moves toward the direction close to the cavity and the protrusion 26 is extended from the forming hole 25 through the conductive component 29, so that the protrusion 26 is located in the cavity. When the shell 1 is formed, the undercut 100 is formed between the core 4, the mold core 6 and the inclined pin 8, and the forming groove 27 is located on the lower surface of the undercut 100. Therefore, when the undercut 100 is formed, a convex strip 28 is formed on the undercut 100. When the shell 1 is connected to the mating part, the convex strip 28 conflicts with the mating part, thereby improving the connection stability between the shell 1 and the mating part.

[0038] The transmission assembly 29 includes a first rack 30, a second rack 31, a gear rod 32, a transmission gear 33, and a transmission screw 34. The first rack 30 is fixed to the inner wall of the mold core 6, and the length direction of the first rack 30 is parallel to the length direction of the sliding hole 7. The second rack 31 is slidably connected to the installation cavity 24, and the length direction of the second rack 31 is parallel to the length direction of the first rack 30.

[0039] The gear rod 32 is rotatably connected in the mounting cavity 24 and one end of the gear rod 32 is meshed with the first rack 30 , and the other end of the gear rod 32 is meshed with the second rack 31 . In addition, the gear rod 32 always remains meshed with the first rack 30 and the second rack 31 .

[0040] The transmission gear 33 is meshed with the second rack 31 and is rotatably connected in the mounting cavity 24, and the transmission gear 33 is always meshed with the second rack 31. The transmission screw 34 is fixed on the transmission gear 33 and threadedly connected with the protrusion 26, and the axis of the transmission screw 34 is colinear with the axis of the transmission gear 33.

[0041] A stripping slope 35 is provided at one end of the projection 26 facing the connecting slope 17. The stripping slope 35 forms a positioning slope 36 on the lower surface of the undercut 100, so that the connection between the undercut 100 and the mating part is more stable. When the molding section 9 is moved away from the cavity, the projection 26 can move along the stripping slope 35 without damaging the undercut 100.

[0042] The molding section 9 moves toward the direction approaching the mold cavity, and the gear rod 32 moves along the length direction of the first rack 30, so that the gear rod 32 rotates, and the gear rod 32 drives the second rack 31 to move, so that the second rack 31 drives the transmission gear 33 to rotate, and the transmission gear 33 drives the connecting screw to rotate, and through the transmission effect of the thread, the protrusion 26 penetrates into the mold cavity along the molding hole 25. Similarly, when the molding section 9 moves away from the mold cavity, the protrusion 26 can be retracted into the molding hole 25.

[0043] A placement cavity 37 is provided on the inner wall of the mold core 6, and the first rack 30 is fixed in the placement cavity 37. A square groove 38 communicating with the placement cavity 37 is provided on the connecting inclined surface 17, and a slide rod 41 is slidably connected in the placement cavity 37, and a square block 39 slidably connected in the square groove 38 is fixedly connected to the end of the slide rod 41.

[0044] The forming section 9 moves toward the direction close to the cavity and makes the square block 39 extend from the square groove 38 through the connecting assembly 42, so that the square block 39 is located in the cavity. A friction groove 40 is provided on the end surface of the square block 39.

[0045] The connecting assembly 42 includes a slider 43, a first inclined surface 44, a second inclined surface 45 and a support spring 46. The slider 43 is slidably connected in the placement cavity 37 and fixedly connected to the forming section 9, and the length direction of the slider 43 is parallel to the displacement direction of the forming section 9. The first inclined surface 44 is opened at the end of the slider 43, and the second inclined surface 45 is opened at the end of the slide bar 41 and is used to fit with the first inclined surface 44, and the second inclined surface 45 always keeps fit with the first inclined surface 44. One end of the support spring 46 is connected to the slide bar 41, and the other end of the support spring 46 is connected to the inner wall of the placement cavity 37.

[0046] Move the forming section 9 toward the cavity, and the slider 43 moves synchronously with the forming section 9. The first inclined surface 44 and the second inclined surface 45 collide to produce a conduction effect, so that the slide rod 41 moves along its own length direction, and the square block 39 moves along the inner wall of the square groove 38 and penetrates into the cavity.

[0047] The square block 39 forms a square groove 47 on the guide slope of the hook 100, and the friction groove 40 forms a friction protrusion 48 on the hook 100, and the friction protrusion 48 is located inside the square groove 47. The height of the friction protrusion 48 is less than the depth of the square groove 47.

[0048] When the molding section 9 moves away from the mold cavity, the square block 39 slides into the square groove 38 through the elastic force of the support spring 46 to separate from the undercut 100 and realize demoulding.

[0049] Therefore, when the molding section 9 moves toward the direction close to the cavity, the protrusion 26 and the square block 39 are both located in the cavity; when the molding section 9 moves away from the cavity, the protrusion 26 and the square block 39 are both moved away from the cavity to achieve rapid demoulding.

[0050] Of course, the above are only typical examples of the present invention. In addition, the present invention may also have many other specific implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A half-line-free injection molding mold for a plastic housing of an automobile air conditioner, comprising an upper mold (2), a lower mold (3), a core (4), a mold core (6) and an inclined pin (8), wherein the core (4) and the mold core (6) are both fixed in the upper mold (2), a cavity is formed between the lower mold (3) and the upper mold (2), a connecting hole (5) is provided on the side wall of the core (4), an end of the mold core (6) is tightly pressed against the outer wall of the core (4) and blocks the connecting hole (5), the mold core (6) is provided with a sliding hole (7) connected to the connecting hole (5), the inclined pin (8) is slidably connected to the sliding hole (7), and a connecting inclined surface (17) is provided at the end of the sliding hole (7), wherein: A limiting groove (16) is provided on the inner wall of the sliding hole (7), the length direction of the limiting groove (16) is parallel to the length direction of the sliding hole (7), and a limiting rod (15) slidably connected to the limiting groove (16) is fixedly connected to the side wall of the oblique pin (8).

2. The automobile air conditioner plastic housing Hough line-free injection molding mold according to claim 1, characterized in that: The oblique pin (8) comprises a forming section (9), a locking sleeve (10), a first latch pin (11), a second latch pin (12), a positioning sleeve (13), and a sliding section (14); the forming section (9) is fixedly connected to a limiting rod (15); the forming section (9) is inserted into the positioning sleeve (13); the end of the forming section (9) is tightly abutted against the end of the sliding section (14); the locking sleeve (10) is sleeved on the positioning sleeve (13) and the sliding section (14); the first latch pin (11) passes through the locking sleeve (10), the positioning sleeve (13), and the forming section (9); and the second latch pin (12) passes through the locking sleeve (10) and the sliding section (14).

3. The automobile air conditioner plastic housing Hough line-free injection molding mold according to claim 2, characterized in that: An inclined block (18) is fixedly connected to one end of the sliding section (14) away from the forming section (9), a power block (19) is slidably connected to the outer wall of the upper mold (2), an inclined groove (20) is provided on the power block (19), the inclined block (18) is slidably connected in the inclined groove (20), and the power block (19) is driven by a power cylinder (21).

4. The automobile air conditioner plastic housing Hough line-free injection molding mold according to claim 2, characterized in that: The molding section (9) is provided with an installation cavity (24), the end of the molding section (9) is provided with a molding hole (25) which is connected with the installation cavity (24), the opening of the molding hole (25) faces the connecting inclined surface (17), a convex block (26) is slidably connected in the molding hole (25), and a molding groove (27) is provided on the convex block (26), and the molding section (9) moves in a direction close to the molding cavity and the convex block (26) is extended out of the molding hole (25) through the conductive component (29).

5. The automobile air-conditioning plastic housing Hough line-free injection molding mold according to claim 4 is characterized in that: The transmission component (29) comprises a first rack (30), a second rack (31), a gear rod (32), a transmission gear (33), and a transmission screw (34); the first rack (30) is fixed on the inner wall of the mold core (6); the second rack (31) is slidably connected to the mounting cavity (24); the gear rod (32) is rotatably connected to the mounting cavity (24) and one end of the gear rod (32) is meshed with the first rack (30); the other end of the gear rod (32) is meshed with the second rack (31); the transmission gear (33) is meshed with the second rack (31) and is rotatably connected to the mounting cavity (24); the transmission screw (34) is fixed on the transmission gear (33) and is threadedly connected to the protrusion (26).

6. The automobile air-conditioning plastic housing Hough line-free injection molding die according to claim 4 or 5, characterized in that: One end of the projection (26) facing the connecting inclined surface (17) is provided with a stripping inclined surface (35).

7. The automobile air-conditioning plastic housing injection molding die without Hough line according to claim 2, 4 or 5, characterized in that: A placement cavity (37) is provided on the inner wall of the mold core (6); a square groove (38) communicating with the placement cavity (37) is provided on the connecting inclined surface (17); a slide rod (41) is slidably connected in the placement cavity (37); the end of the slide rod (41) is fixedly connected to a square block (39) slidably connected in the square groove (38); the molding section (9) moves toward the direction approaching the molding cavity and the square block (39) is extended out of the square groove (38) through the connecting component (42); and a friction groove (40) is provided on the square block (39).

8. The automobile air conditioner plastic housing Hough line-free injection molding die according to claim 7, characterized in that: The connecting assembly (42) includes a slider (43), a first inclined surface (44), a second inclined surface (45) and a support spring (46); the slider (43) is slidably connected in the placement cavity (37) and fixedly connected to the forming section (9); the first inclined surface (44) is opened at the end of the slider (43); the second inclined surface (45) is opened at the end of the slide rod (41) and is used to fit with the first inclined surface (44); one end of the support spring (46) is connected to the slide rod (41), and the other end of the support spring (46) is connected to the inner wall of the placement cavity (37).

9. The automobile air conditioner plastic housing injection molding die without Hough line according to claim 3, characterized in that: A limit block (22) is fixedly connected to the outer wall of the upper mold (2), and the power block (19) is slidably connected to the limit block (22).

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