CN211307281U

CN211307281U - Automatic injection molding device for cosmetic outer covers

Info

Publication number: CN211307281U
Application number: CN201922181125.XU
Authority: CN
Inventors: 谭亮
Original assignee: Huizhou Haorun Packaging Technology Co ltd
Current assignee: Huizhou Haorun Packaging Technology Co ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-08-21
Anticipated expiration: 2029-12-09

Abstract

The utility model relates to an injection mold technical field especially relates to a cosmetics enclosing cover is with automatic device of moulding plastics. Comprises a front mould component and a rear mould component; the front mold assembly and the rear mold assembly are in matched butt joint, and a fixed mold matched with a preset injection molding piece is arranged on the rear mold assembly; the front die assembly comprises an upper template and a lower template; the rear die assembly pulls the ejection die plate to move in the lower die plate through the built-in pull rod, the ejection assembly is driven to eject the injection molding piece, and the injection molding piece is separated from the lower die plate. The utility model drives the ejection assembly to eject out the injection molding through the three-plate mold, the external connecting pull rod and the built-in pull rod, thereby ensuring the speed of the demolding reliability of the product, realizing the full automation of injection molding, greatly improving the efficiency of injection molding of the product and reducing the production cost of enterprises; when the drawing of patterns, the block between slip kicking block, the type of moulding plastics piece and the injection molding staggers, ensures can not cause the harm to the injection molding in the drawing of patterns process, has guaranteed the reliability of moulding plastics, reduces the manufacturing cost that the product was moulded plastics.

Description

Automatic injection molding device for cosmetic outer covers

Technical Field

The utility model relates to an injection mold technical field especially relates to a cosmetics enclosing cover is with automatic device of moulding plastics.

Background

In industrial production, the cosmetic outer cover is usually obtained by injection molding through an injection molding machine, while a high-end cosmetic outer cover is usually required to be provided with a specific shape on the outer surface inside, so that when demolding is carried out, the mold insert for injection molding and the injection molding part need to be separated firstly, and then the injection molding part and a mold need to be separated.

Certainly, some injection molding machines capable of automatically demolding exist in the market, but during demolding, the injection molding part is easily damaged by the mold insert, so that the quality of the product is greatly influenced, the reject ratio of the product is increased, and the production cost of an enterprise is greatly increased.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes the prior art mentioned above, at least one kind defect (not enough) provide a cosmetics enclosing cover is with automatic device of moulding plastics.

In order to solve the technical problem, the technical scheme of the utility model as follows:

an automatic injection molding device for cosmetic outer covers, comprising a front mold assembly and a rear mold assembly; the front mold assembly and the rear mold assembly are in matched butt joint, and a fixed mold matched with a preset injection molding piece is arranged on the rear mold assembly; the front die assembly comprises an upper die plate and a lower die plate; the upper template and the lower template are connected by an external pull rod in a pulling way; the bottom of the lower template is provided with a movable die matched with the fixed die, the lower template is butted with the rear die assembly through the matching of the movable die and the fixed die, and a cavity is formed at the fixed die; the top of the upper template is provided with an injection molding opening, and the injection molding opening is in conduction connection with the surface of the movable mold through a conduction pipe; an ejection template and an ejection assembly are arranged in the lower template, one end of the ejection assembly is connected with the ejection template, and the end part of the other end of the ejection assembly forms the surface of the movable mold; the ejection template and the rear mould assembly are in limiting clamping connection through an internal pull rod, the rear mould assembly pulls the ejection template to move in the lower template through the internal pull rod, the ejection assembly is driven to eject the injection molding piece, and the injection molding piece is separated from the lower template.

Furthermore, the ejection assembly comprises an ejector pin and two sliding ejector blocks; one end of the ejector pin is fixedly connected with the ejector template, and the other end of the ejector pin is arranged in the middle of the movable die; the two sliding ejector blocks are obliquely arranged towards the center of the movable die along the direction from the ejection template to the movable die, one ends of the two sliding ejector blocks are horizontally connected with the ejection template in a sliding manner, and the other ends of the two sliding ejector blocks are symmetrically arranged along the ejector pins; and the sliding top block is provided with a bulge at the outer edge of the movable die.

Furthermore, the sliding ejector block is provided with a sliding groove near the bottom, the ejector die plate is provided with positioning blocks on two sides of the sliding ejector block, the positioning blocks are provided with protruding parts matched with the sliding grooves, and the sliding ejector block is horizontally clamped on the positioning blocks in a sliding mode through the matching of the sliding grooves and the protruding parts.

Furthermore, an injection molding block is arranged on one side of the movable mold of the lower template; the injection molding block is connected with the edge of the cavity, and a groove with a preset shape is arranged at the connection part; the lower template is also provided with limiting blocks at two sides of the injection molding block, and the limiting blocks are in limiting connection with the injection molding block; the injection molding block is also provided with an inclined positioning hole, and the rear mold assembly is provided with an inclined rod matched with the positioning hole; and the rear die assembly is in driving connection with the injection molding block through the matching of the inclined rod and the positioning hole.

Furthermore, the inclined direction of the positioning hole is that the positioning hole is inclined from top to bottom along the side end of the lower template towards the direction of the movable mold.

Furthermore, two end parts of the external connecting pull rod are provided with first bosses, and the middle part of the external connecting pull rod is provided with two sliding fixture blocks in a sliding manner; the upper template and the lower template are provided with clamping grooves corresponding to the sliding clamping blocks; the two sliding clamping blocks are fixedly clamped with the upper template and the lower template through clamping grooves respectively, and the sliding clamping blocks are limited on the external pull rod through first bosses.

Furthermore, the external pull rods are arranged in two groups, the two groups of external pull rods are arranged at one opposite side end of the front die assembly, and two groups of external pull rods are arranged at one side end of the front die assembly.

Furthermore, second bosses are arranged at two end parts of the built-in pull rod, and the rear die assembly and the ejection die plate are arranged on the built-in pull rod in a limiting sliding mode through the second bosses.

Further, the upper template comprises a first template and a second template; the first template is fixedly connected with the second template, and an injection molding opening is formed in the first template; and a cooling pipe through hole is formed in one side of the second template, and the upper template is fixedly clamped with the sliding clamping block of the external pull rod through the second template.

Furthermore, four groups of fixed dies and movable dies are matched.

The utility model discloses a three-plate mould, external pull rod and built-in pull rod drive ejecting subassembly ejecting to the injection molding, have ensured the speed of the drawing of patterns reliability of product, realize the full automatization of moulding plastics, have improved the efficiency that the product was moulded plastics greatly, have reduced the manufacturing cost of enterprise. Simultaneously, when the drawing of patterns, through inclined plane drive slip kicking block and the type of moulding plastics piece, stagger the block between slip kicking block, the type of moulding plastics piece and the injection molding, guarantee can not cause the harm to the injection molding in the drawing of patterns process, guaranteed the reliability of moulding plastics, increased the qualification rate of product, the market competitiveness of reinforcing product reduces the manufacturing cost that the product was moulded plastics.

Drawings

Fig. 1 is a structural diagram of an automatic injection molding device according to an embodiment of the present invention.

Fig. 2 is an exploded view of the automatic injection molding device according to the embodiment of the present invention.

Fig. 3 is the matching structure diagram of the moving mold and the fixed mold according to the embodiment of the present invention.

Fig. 4 is an assembly view of the ejector assembly of the embodiment of the present invention on the moving die.

Wherein: the injection molding device comprises a front mold assembly 1, a rear mold assembly 2, an external connecting pull rod 3, a built-in pull rod 4, an upper mold plate 11, a lower mold plate 12, a movable mold 13, a fixed mold 21, an inclined rod 22, a first boss 31, a sliding clamping block 32, a first mold plate 111, a second mold plate 112, an ejection mold plate 121, an ejection assembly 122, an injection molding block 123, an ejector pin 1221, an ejector block 1222 sliding and a groove 1231.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Examples

An automatic injection molding apparatus for cosmetic outer caps, referring to fig. 1 to 4, includes a front mold assembly 1 and a rear mold assembly 2; preceding mould subassembly 1 and the cooperation butt joint of back mould subassembly 2, it is concrete, preceding mould subassembly 1 sets up in the top of back mould subassembly 2, and is provided with on the back mould subassembly 2 with predetermined injection molding assorted cover half 21, preceding mould subassembly 1 includes cope match-plate pattern 11 and lower bolster 12, connects through the 3 pulling of external pull rod between cope match-plate pattern 11 and the lower bolster 12, and is concrete, and cope match-plate pattern 11 sets up in the top of lower bolster 12. The bottom of the lower template 12 is provided with a movable mold 13 matched with the fixed mold 21, the lower template 12 is connected with the rear mold assembly 2 oppositely, and at the moment, the fixed mold 21 and the movable mold 13 are in matched butt joint to form a cavity for injection molding to form an injection molding part. The top of the upper template 11 is provided with an injection molding opening, and the injection molding device injects injection molding liquid through the injection molding opening. The mouth of moulding plastics is through conducting tube and movable mould 13 surface conduction connection, and is specific, and the one end setting of conducting tube is in the middle part on movable mould 13 surface, and the liquid of moulding plastics is followed the mouth of moulding plastics and is injected into the die cavity through the conducting tube.

In addition, an ejection template 121 and an ejection assembly 122 are arranged in the lower module, one end of the ejection assembly 122 is slidably connected to the ejection template 121, and the end of the other end forms the surface of the movable mold 13, and it should be noted that the surface of the movable mold 13 formed at one end of the ejection assembly 122 is specifically, a cavity for accommodating the ejection assembly 122 is arranged at the movable mold 13 of the lower template 12, and the ejection assembly 122 is arranged at the movable mold 13 through the cavity, so as to form the movable mold 13 for forming the cavity in cooperation with the movable mold 13 assembly of the lower template 12. The automatic injection molding device is further internally provided with a built-in pull rod 4, the ejection template 121 and the rear template assembly 2 of the lower template 12 are respectively movably connected with the built-in pull rod 4, specifically, two ends of the built-in pull rod 4 are provided with second bosses, the ejection template 121 and the rear template assembly 2 are provided with through holes matched with rod bodies of the built-in pull rod 4, the ejection template 121 and the rear template assembly 2 are sleeved on the built-in pull rod 4, the spacing between the ejection template 121 and the rear template assembly is completed through the second bosses of the built-in pull rod 4, when the ejection template 121 and the rear template assembly are respectively clamped on the second bosses at two ends of the built-in pull rod 4, the rear template assembly 2 pulls the ejection template 121 to move relatively on the lower template 12 through the built-in pull rod 4, so that the ejection template 121 drives the ejection assembly 122 to eject injection molding pieces attached to the movable mold 13 after injection. More specifically, the number of the built-in pull rods 4 is two, and the two built-in pull rods are respectively and symmetrically arranged along the vertical central axis of the automatic injection molding device.

In some embodiments, referring to fig. 3 to 4, the ejector assembly 122 includes two ejector pins 1221 and two sliding ejector blocks 1222, one end of each ejector pin 1221 is fixedly connected to the ejector module, and the other end of each ejector pin 1221 is disposed in the middle of the movable mold 13, specifically, two ejector pins 1221 are disposed, and the two ejector pins 1221 are symmetrically disposed along the center of the movable mold 13. One end of each of the two sliding ejector blocks 1222 is horizontally slidably connected with the ejector die plate 121, the other end of each of the two sliding ejector blocks 1222 is symmetrically arranged along the ejector pins 1221, and the sliding ejector blocks 1222 are provided with protrusions at the outer edge of the movable die 13, so that grooves on the inner surface of the injection molding piece are formed by the protrusions. The two sliding ejector blocks 1222 are arranged obliquely, and the oblique direction is the inclination from the joint of the ejector template 121 to the center of the movable mold 13, when the ejector template 121 drives the sliding ejector blocks 1222 to eject, because the sliding ejector blocks 1222 are pressed by the periphery of the cavity of the movable mold 13, one end of the sliding ejector block 1222 connected with the ejector template 121 slides towards the central axis direction of the movable mold 13, so that the clamping between the protrusion of the sliding ejector block 1222 and the injection molding piece is staggered, and the injection molding piece is ejected smoothly.

In some embodiments, referring to fig. 3, the sliding top block 1222 is connected to the ejecting template 121 in a specific relationship, the sliding top block 1222 is provided with a sliding groove near the bottom, i.e. near the end connected to the ejecting template 121, the ejecting template 121 is provided with positioning blocks at both sides of the sliding top block 1222, the positioning blocks are provided with protrusions matching with the sliding groove, and the sliding top block 1222 is clamped on the positioning blocks through the matching of the sliding groove and the protrusions and can slide horizontally on the positioning blocks. Therefore, the protrusion of the sliding ejector block 1222 is reliably and effectively staggered with the injection molding piece, and the injection molding piece is prevented from being damaged due to overlarge ejecting force.

In some embodiments, referring to fig. 4, the lower mold plate 12 is further provided with an injection molding block 123 on one side of the movable mold 13, the injection molding block 123 is connected with the edge of the mold cavity, and a groove 1231 with a preset shape is formed at the connection position, and the preset shape is formed on the outer surface of the injection molded part through injection molding of the groove 1231. The lower template 12 is further provided with limiting blocks at two sides of the injection molding block 123, and the limiting blocks are in limiting connection with the injection molding block 123. Specifically, the side of the limiting block is provided with a flexible spherical convex block, so that the injection molding block 123 is limited in the limiting block. The injection molding block 123 is further provided with an inclined positioning hole, the rear mold assembly 2 is provided with an inclined rod 22 matched with the positioning hole, the inclined rod 22 is inserted into the positioning hole, and the rear mold assembly 2 is in driving connection with the injection molding block 123 through the matching of the inclined rod 22 and the positioning hole. Specifically, the inclination direction of the positioning hole is that the positioning hole is arranged from top to bottom along the side end of the lower template 12 to the direction of the movable mold 13 in an inclined manner. More specifically, when the drawing of patterns, when lower module and back mould assembly 2 separation, the type of moulding 123 receives the thrust of down tube 22, takes place horizontal displacement under the centre gripping of stopper to the buckle between the type groove 1231 of the type of moulding 123 of contact and the injection molding guarantees that the injection molding can be smooth ejecting by ejecting subassembly 122, receives the damage when avoiding the injection molding drawing of patterns.

Specifically, the automatic injection molding device of the present embodiment has the specific operation steps and principle that, specifically, the front mold assembly 1 is disposed above the rear mold assembly 2, and the injection molding opening is disposed at the top of the front mold assembly 1. When the injection molding device is used, injection molding liquid is injected from the injection molding opening and enters the cavity through the conduction pipe for injection molding, and the injection molding piece is subjected to injection molding under the action of the cooling pipe. After injection molding is completed, demolding is performed on the injection molded part, and specifically, the automatic injection molding device drives the push rod to push the upper template 11 upwards. After the upper die plate 11 moves to the end part of the external connecting pull rod 3, the lower die plate 12 is pulled to move upwards through the external connecting pull rod 3, so that the lower die plate 12 is separated from the rear die assembly 2, and the injection molding piece moves upwards along with the movable die 13 due to the fact that the movable die 13 is provided with the insert buckled with the injection molding piece. After the lower mold plate 12 moves to the end of the built-in pull rod 4, the ejector mold plate 121 in the lower mold plate 12 is pulled by the rear mold assembly 2 to move downward relative to the lower mold plate 12 in the lower mold plate 12, so that the ejector assembly 122 is driven to eject the injection molded part downward. During ejection, the sliding ejector block 1222 is retracted inwards along the ejection template 121 through the sliding groove and the positioning groove, so that the protrusion of the sliding ejector block 1222 is separated from the injection molding piece; the injection molding block 123 is separated from the injection molding part through the inclined rod 22, so that the injection molding part can be smoothly separated, and the insert forming the injection molding part cannot damage the injection molding part.

The benefit of this structure lies in, the automatic of cosmetics enclosing cover is moulded plastics and the drawing of patterns can be accomplished to this structure, it need not the manual work to go on taking out the injection molding to guarantee the product after moulding plastics, and the operation of moulding plastics and drawing of patterns is swift effective, through three-plate mould, external pull rod 3 and built-in pull rod 4 drive ejecting subassembly 122 ejecting to the injection molding, the speed of the drawing of patterns reliability of product has been ensured, realize the full automatization of moulding plastics, the efficiency of product injection moulding is greatly improved, the manufacturing cost of enterprise has been reduced. Meanwhile, when the injection molding machine is used for demolding, the sliding ejector block 1222 and the injection molding block 123 are driven through the inclined surface, the sliding ejector block 1222, the injection molding block 123 and the injection molding piece are staggered, the injection molding piece cannot be damaged in the demolding process, the injection molding reliability is guaranteed, the qualified rate of products is increased, the market competitiveness of the products is enhanced, and the injection molding production cost of the products is reduced.

In some embodiments, the two end portions of the external connecting rod 3 are provided with first bosses 31, the middle portion of the external connecting rod 3 is provided with two sliding fixture blocks 32, the upper mold plate 11 and the lower mold plate 12 are provided with clamping grooves corresponding to the sliding fixture blocks 32, the two sliding fixture blocks 32 are fixedly clamped with the upper mold plate 11 and the lower mold plate 12 through the clamping grooves, and the sliding fixture blocks 32 are limited on the external connecting rod 3 through the first bosses 31. The push rod rebound of cope match-plate pattern 11 through automatic device of moulding plastics, with the slip fixture block 32 of 11 joints of cope match-plate pattern remove on the extension pull rod 3, when it removed to the first boss 31 joint in top and upper portion, drive the extension pull rod 3 rebound to drive lower bolster 12 and up-move, thereby make cope match-plate pattern 11 drive lower bolster 12 and remove. Specifically, the external connecting rods 3 are provided with two groups, the two groups of external connecting rods 3 are arranged on one side of the front module assembly 1, and two groups of external connecting rods 3 are arranged on one side of the front module assembly 1. The firm and stable connection between the upper template 11 and the lower template 12 is ensured, and the reliability of the automatic injection molding device is improved.

In some embodiments, the two end portions of the built-in pull rod 4 are provided with second bosses, the rear mold assembly 2 and the ejection mold plate 121 are both sleeved on the built-in pull rod 4, and are limited by the second bosses at the two end portions of the built-in pull rod 4, the rear mold assembly 2 limits the maximum distance between the rear mold assembly 2 and the ejection mold plate 121 through the built-in pull rod 4, and drives the ejection module through the built-in pull rod 4, so that the ejection module moves relative to the lower mold plate 12, and the ejection module drives the ejection assembly 122 to eject the injection molded part, thereby completing demolding of the injection molded part. This joint structure is convenient effective, can ensure deviating from smoothly of injection molding.

For better operation experience, a specific structure of the automatic injection molding machine for cosmetic outer lids of the present embodiment is provided, and specifically, the structure is used for injection molding of cosmetic outer lids, wherein a groove is provided at an inner edge of a lid body of the cosmetic outer lid, and a block of a specific shape is provided at an outer edge thereof, which are respectively formed by a protrusion of the sliding top block 1222 and the injection molding block 123. After the injection molding is finished, the sliding ejector block 1222 is extruded to move towards the middle part, the longitudinal buckling connection of the protrusion and the groove is staggered, similarly, the injection molding block 123 horizontally moves in the limiting block through the inclined rod 22, and the staggering between the injection molding block and the injection molding block is completed, so that the product can be smoothly ejected after being subjected to ejection force, and the damage of the injection molding piece cannot be caused. More specifically, the upper mold plate 11 includes a first mold plate 111 and a second mold plate 112, wherein the first mold plate 111 and the second mold plate 112 are fixedly connected, the first mold plate 111 is disposed above the second mold plate 112, an injection molding opening is formed in the first mold plate 111, a cooling pipe through hole is formed in one side of the second mold plate 112, so that injection molding and cooling of the automatic injection molding device are completed, and the upper mold plate 11 is fixedly clamped with the sliding fixture block 32 of the external connecting pull rod 3 through the second mold plate 112. It should be noted that, in the present embodiment, four sets of the fixed mold 21 and the movable mold 13 are provided in cooperation, and the automatic injection molding apparatus can simultaneously perform injection molding of four sets of injection molded parts.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An automatic injection molding device for cosmetic outer covers, characterized by comprising a front mold assembly (1) and a rear mold assembly (2); the front die assembly (1) and the rear die assembly (2) are in matched butt joint, and a fixed die (21) matched with a preset injection molding piece is arranged on the rear die assembly (2); the front die assembly (1) comprises an upper die plate (11) and a lower die plate (12); the upper template (11) and the lower template (12) are connected by pulling through an external pull rod (3); the bottom of the lower template (12) is provided with a movable die (13) matched with the fixed die (21), the lower template (12) is butted with the rear die assembly (2) through the matching of the movable die (13) and the fixed die (21), and a cavity is formed at the fixed die (21); an injection molding opening is formed in the top of the upper template (11), and the injection molding opening is in conduction connection with the surface of the movable mold (13) through a conduction pipe; an ejection template (121) and an ejection assembly (122) are arranged in the lower template (12), one end of the ejection assembly (122) is connected with the ejection template (121), and the end part of the other end of the ejection assembly forms the surface of the movable mold (13); the ejection template (121) and the rear mold assembly (2) are in limiting clamping connection through the built-in pull rod (4), the rear mold assembly (2) pulls the ejection template (121) to move in the lower template (12) through the built-in pull rod (4), the ejection assembly (122) is driven to eject the injection molding piece, and the injection molding piece is separated from the lower template (12).

2. An automatic injection molding apparatus for cosmetic outer covers according to claim 1, wherein the ejector assembly (122) comprises an ejector pin (1221) and two sliding ejector blocks (1222); one end of the ejector pin (1221) is fixedly connected with the ejector template (121), and the other end of the ejector pin is arranged in the middle of the movable mold (13); the two sliding ejector blocks (1222) are obliquely arranged towards the center of the movable die (13) along the direction from the ejector template (121) to the movable die (13), one end of each sliding ejector block is horizontally connected with the ejector template (121) in a sliding mode, and the other ends of the sliding ejector blocks are symmetrically arranged along the ejector pins (1221); and the sliding top block (1222) is provided with a protrusion at an outer edge of the movable mold (13).

3. The automatic injection molding device for cosmetic outer caps according to claim 2, wherein the sliding top block (1222) is provided with a sliding groove near the bottom, the ejecting template (121) is provided with positioning blocks on both sides of the sliding top block (1222), the positioning blocks are provided with protrusions matched with the sliding groove, and the sliding top block (1222) is horizontally slidably engaged with the positioning blocks through the matching of the sliding groove and the protrusions.

4. The automatic injection molding device for cosmetic covers according to claim 2, wherein the lower mold plate (12) is further provided with an injection molding block (123) at one side of the movable mold (13); the injection molding block (123) is connected with the edge of the cavity, and a groove (1231) with a preset shape is arranged at the connection part; the lower template (12) is also provided with limiting blocks at two sides of the injection molding block (123), and the limiting blocks are in limiting connection with the injection molding block (123); the injection molding block (123) is also provided with an inclined positioning hole, and the rear mold assembly (2) is provided with an inclined rod (22) matched with the positioning hole; the rear die assembly (2) is in driving connection with the injection molding block (123) through the matching of the inclined rod (22) and the positioning hole.

5. The automatic injection molding device for cosmetic covers according to claim 4, wherein the positioning holes are inclined in a direction in which the positioning holes are inclined from the top to the bottom in a direction from the edge of the lower mold plate (12) toward the movable mold (13).

6. The automatic injection molding device for cosmetic outer caps according to claim 1, wherein the outer tie bar (3) is provided at both ends thereof with first bosses (31) and at the middle thereof with two sliding blocks (32); clamping grooves corresponding to the sliding clamping blocks (32) are formed in the upper template (11) and the lower template (12); the two sliding clamping blocks (32) are fixedly clamped with the upper template (11) and the lower template (12) through clamping grooves respectively, and the sliding clamping blocks (32) are limited on the external pull rod (3) through first bosses (31).

7. An automatic injection molding device for cosmetic outer caps according to claim 6, wherein the external tie bars (3) are provided in two sets, and two sets of the external tie bars (3) are provided on an opposite side end of the front mold assembly (1), and two sets of the external tie bars (3) are provided on one side end of the front mold assembly (1).

8. An automatic injection molding device for cosmetic outer caps according to claim 1, wherein second bosses are provided at both end portions of the inner tie bar (4), and the rear mold assembly (2) and the ejector template (121) are both slidably provided on the inner tie bar (4) at a limited position by the second bosses.

9. An automatic injection molding apparatus for cosmetic covers according to claim 1, wherein the upper mold plate (11) comprises a first mold plate (111) and a second mold plate (112); the first template (111) is fixedly connected with the second template (112), and an injection molding opening is formed in the first template (111); one side of second template (112) is provided with the cooling tube through-hole, and cope match-plate pattern (11) through second template (112) with the fixed joint of slip fixture block (32) of external pull rod (3).

10. An automatic injection molding apparatus for cosmetic outer caps according to claim 1, wherein the fixed mold (21) and the movable mold (13) are provided in four sets in cooperation.