A PETG replaceable environmentally friendly combination can and its production process

Abstract

The present invention discloses a PETG replaceable environmentally friendly combination can and its production process, belonging to the technical field of cosmetic packaging. It includes an upper cover and a can body with an upper opening, wherein the upper cover is composed of an upper cover outer shell and an upper cover inner liner fixed in the upper cover outer shell, and the can body is composed of a can body outer shell and a can body inner liner fixed inside the can body outer shell. An upper cover positioning block and an upper cover convex rib are provided on the outer side of the circumference of the upper cover inner liner, which can be conveniently engaged and fixed with the upper cover outer shell; a pair of grooves are rotationally symmetrically provided on both sides of the circumference of the outer threaded part of the can body outer shell, and the can body inner liner is inserted into the groove of the can body outer shell through a clamping seam, and the can body outer shell and the can body inner liner are fixed by the cooperation of a cross convex rib and a cross groove, and the cross convex rib structure can fasten the can body outer shell and the can body inner liner in the longitudinal and transverse directions at the same time.

Description

Technical Field

[0001] The invention relates to a PETG replaceable environmentally friendly combination can and a production process thereof, belonging to the technical field of cosmetic packaging. Background Art

[0002] PETG is a transparent, non-crystalline copolyester. The commonly used comonomer of PETG is 1,4-cyclohexanedimethylene (CHDM), which is called polyethylene terephthalate-1,4-cyclohexanedimethylene ester. It is a product of terephthalic acid (PTA), ethylene glycol (EG) and 1,4-cyclohexanedimethanol (CHDM) by ester exchange. Compared with PET, it has more 1,4-cyclohexanedimethanol comonomer, and compared with PCT, it has more ethylene glycol comonomer. Therefore, the performance of PETG is very different from that of PET and PCT. PETG sheet has outstanding toughness and high impact strength. Its impact strength is 3-10 times that of modified polyacrylates. It has a wide processing range, high mechanical strength and excellent flexibility. Compared with PVC, it has high transparency, good gloss, easy printing and environmental protection advantages. In the field of cosmetics, it can be used to make environmentally friendly combination cans.

[0003] Cream cosmetics can be packaged in combination cans with PETG shells. At present, combination cans mainly include an upper cover and a can body with an upper opening. The upper cover is composed of an upper cover shell and an upper cover liner fixed in the upper cover shell, and the can body is composed of a can shell and a can body liner fixed inside the can shell. Among them, the upper cover shell and the can shell are made of PETG material, and the upper cover liner and the can body liner are made of PP material. The fixing methods between the upper cover shell and the upper cover liner, and between the can shell and the can body liner are all locked and cannot be disassembled. The shell style is also not replaceable. It is thrown away after use, which is not environmentally friendly.

[0004] Therefore, a PETG replaceable environmentally friendly combination can is designed, in which the outer shell and the inner liner are replaceable and detachable, which is convenient for replacement and achieves a good fit between the inner liner and the outer can, and the upper cover and the can body have good sealing. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a PETG replaceable environmentally friendly combination can and a production process thereof, which solves the problem that it is inconvenient to replace the inner liner of the existing combination can.

[0006] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0007] A PETG replaceable environmentally friendly combined can, comprising an upper cover and a can body with an upper opening, wherein the upper cover is composed of an upper cover outer shell and an upper cover inner liner fixed inside the upper cover outer shell, and the can body is composed of a can body outer shell and a can body inner liner fixed inside the can body outer shell;

[0008] The upper cover inner shell is provided with an upper cover positioning block and an upper cover convex rib on the outer circumference of the upper cover inner shell, an internal thread is provided inside the upper cover inner shell, an upper cover positioning groove matched with the upper cover positioning block and an upper cover buckle matched with the upper cover convex rib are provided on the inner circumference of the upper cover outer shell, the upper cover positioning block of the upper cover inner shell is inserted into the upper cover positioning groove, and the upper cover buckle of the upper cover outer shell is clamped under the upper cover convex rib;

[0009] The outer shell of the tank body is provided with an external threaded portion, a pair of grooves are rotationally symmetrically provided on both sides of the circumference of the external threaded portion, and a raised cross rib is provided on the inner wall of the groove. A pair of clamping blocks corresponding to the grooves are provided on the outer side of the upper port of the tank body, and a clamping seam is provided between the clamping block and the tank body, and a cross groove matching the cross rib is provided on the inner wall of the clamping block. The tank body is inserted into the groove of the outer shell of the tank body through the clamping seam, and the tank body outer shell and the tank body are fixed by the cross rib and the cross groove.

[0010] The upper cover inner shell is screwed and fixed to the outer thread portion of the tank body shell through the inner thread.

[0011] As a preferred example, half of the inner wall of the groove is a smooth arc surface, and the other half is provided with cross ribs.

[0012] As a preferred example, the cross ribs are composed of vertical ribs and transverse ribs perpendicularly crossed, and arc chamfers are arranged at two outer edges of the vertical ribs.

[0013] As a preferred example, the end of the transverse rib close to the smooth curved surface gradually and smoothly transitions from a convex state to the smooth curved surface.

[0014] As a preferred example, the upper port of the tank body liner is provided with an annular retaining ring extending horizontally outward, a clamping block is provided at the lower outer side of the annular retaining ring, and a clamping joint is provided between the clamping block and the tank body liner. When the tank body shell and the tank body liner are fixed, the annular retaining ring is tightly against the upper end of the external threaded part.

[0015] As a preferred example, two horizontal upper cover convex ribs are symmetrically arranged on the outer side of the circumference of the upper cover inner shell, and a pair of upper cover buckles cooperating with the upper cover convex ribs are arranged on the inner wall of the circumference of the upper cover outer shell.

[0016] As a preferred example, the lower edge of the upper cover inner shell is provided with an annular step extending outward, and when the upper cover outer shell is fixed to the upper cover inner shell, the annular step is tightly against the lower port of the upper cover outer shell.

[0017] A production process of a PETG replaceable environmentally friendly combination can comprises the following steps:

[0018] (1) Production of cover liner and tank liner

[0019] The PP plastic particles are dried in a drying hopper at 50°C, and then sent to the corresponding injection molding machine. The mold of the injection molding machine is cooled by a 12S cycle of the mold temperature controller to produce the upper cover liner and the tank body liner respectively;

[0020] (3) Production of upper cover shell and tank shell

[0021] After the PETG plastic particles are fed into the corresponding injection molding machine, they are fully mixed and melted at 230-250℃ by a screw mixer to produce the upper cover shell and the tank shell respectively;

[0022] (3) Assembly of the upper cover and tank body

[0023] Insert the upper cover inner shell into the upper cover outer shell, insert the upper cover positioning block into the upper cover positioning groove, and clip the upper cover under the upper cover rib to complete the upper cover assembly;

[0024] Insert the card seam of the tank liner into the groove of the tank shell, rotate the tank liner to match the cross groove with the cross rib, and complete the tank assembly;

[0025] The inner thread of the upper cover inner shell is screwed and fixed together with the outer thread of the tank body outer shell.

[0026] As a preferred example, the injection molding process in step (1) is carried out under the conditions of a medium pressure of 100 MPA and a medium speed of 65 mm / s.

[0027] As a preferred example, the injection molding process in step (2) is carried out under the conditions of a medium pressure of 150 MPA and a medium speed of 30 mm / s.

[0028] The beneficial effects of the present invention are:

[0029] (1) The outer side of the circumference of the upper cover inner shell is provided with an upper cover positioning block and an upper cover convex rib, which can be conveniently engaged and fixed with the upper cover outer shell;

[0030] (2) A pair of grooves are rotationally symmetrically arranged on both sides of the circumference of the outer thread of the tank shell. The tank liner is inserted into the grooves of the tank shell through a clamping seam. The tank shell and the tank liner are fixed together by a cross rib and a cross groove. The cross rib structure can fasten the tank shell and the tank liner in both the longitudinal and transverse directions.

[0031] (3) Through this production process, a cross rib and cross groove structure that meets the requirements of injection molding can be produced, and it is convenient to assemble together and also convenient to disassemble and replace later. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1It is a schematic diagram of the explosion structure of the present invention;

[0033] Figure 2 It is a schematic diagram of the upper cover structure;

[0034] Figure 3 It is a schematic diagram of the tank structure;

[0035] Figure 4 It is a schematic diagram of the enlarged local structure at the cross rib;

[0036] Figure 5 It is a schematic diagram of the structure of the joint between the tank shell and the tank body;

[0037] Figure 6 It is a structural schematic diagram of the combined state of the present invention;

[0038] Figure 7 It is a structural schematic diagram of the present invention in an open cover state;

[0039] Figure 8 It is a schematic diagram of the three-dimensional structure of the present invention.

[0040] In the figure: upper cover 1, upper cover shell 101, upper cover liner 102, upper cover positioning block 103, upper cover rib 104, internal thread 105, annular step 106, tank body 2, tank body shell 201, tank body liner 202, external thread portion 203, groove 204, cross rib 205, vertical rib 2051, transverse rib 2052, arc chamfer 2053, clamping block 206, clamping seam 207, smooth arc surface 208, annular retaining ring 209. DETAILED DESCRIPTION

[0041] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments.

[0042] Example 1

[0043] like Figure 1-Figure 8 As shown, a PETG replaceable environmentally friendly combination can comprises an upper cover 1 and a can body 2 with an upper opening, wherein the upper cover 1 is composed of an upper cover outer shell 101 and an upper cover inner liner 102 fixed inside the upper cover outer shell 101, and the can body 2 is composed of a can body outer shell 201 and a can body inner liner 202 fixed inside the can body outer shell 201;

[0044] An upper cover positioning block 103 and an upper cover convex rib 104 are provided on the outer circumference of the upper cover inner liner 102, an internal thread 105 is provided inside the upper cover inner liner 102, an upper cover positioning groove (blocked in the figure) matched with the upper cover positioning block 103 and an upper cover buckle (blocked in the figure) matched with the upper cover convex rib 104 are provided on the inner circumference wall of the upper cover shell 101, the upper cover positioning block 103 of the upper cover inner liner 102 is inserted into the upper cover positioning groove, and the upper cover buckle of the upper cover shell 101 is clamped under the upper cover convex rib 104;

[0045] The tank shell 201 is provided with an external threaded portion 203, and a pair of grooves 204 are rotationally symmetrically provided on both sides of the circumference of the external threaded portion 203, and a raised cross rib 205 is provided on the inner wall of the groove 204. A pair of clamping blocks 206 corresponding to the groove 204 are provided on the outer side of the upper port of the tank body liner 202, and a clamping seam 207 is provided between the clamping block 206 and the tank body liner 202. A cross groove (hidden in the figure) matching with the cross rib 205 is provided on the inner wall of the clamping block 206. The tank body liner 202 is inserted into the groove 204 of the tank shell 201 through the clamping seam 207, and the tank shell 201 and the tank body liner 202 are fixed by the cross rib 205 and the cross groove.

[0046] The upper cover inner liner 102 is screwed and fixed to the outer thread portion 203 of the tank shell 201 via the inner thread 105 .

[0047] A production process of a PETG replaceable environmentally friendly combination can comprises the following steps:

[0048] (1) Production of upper cover liner 102 and tank body liner 202

[0049] The PP plastic particles are dried in a drying hopper at 50°C and then fed into a corresponding injection molding machine. The mold of the injection molding machine is cooled by a 12S cycle of a mold temperature controller. The injection molding process is carried out under the conditions of a medium pressure of 100MPA and a medium speed of 65mm / s to produce an upper cover liner 102 and a tank body liner 202 respectively.

[0050] (2) Production of upper cover shell 101 and tank shell 201

[0051] After the PETG plastic particles are fed into the corresponding injection molding machine, they are fully mixed and melted at 230-250°C by a screw mixer and molded. The injection molding process is carried out under the conditions of 150MPA medium pressure and 30mm / s medium speed to produce the upper cover shell 101 and the tank shell 201 respectively;

[0052] (3) Assembly of the upper cover 1 and the tank body 2

[0053] Insert the upper cover liner 102 into the upper cover outer shell 101, insert the upper cover positioning block 103 into the upper cover positioning groove, and clip the upper cover under the upper cover rib 104 to complete the assembly of the upper cover 1;

[0054] Insert the joint 207 of the tank body liner 202 into the groove 204 of the tank body shell 201, rotate the tank body liner 202 to match the cross groove with the cross rib 205, and complete the assembly of the tank body 2;

[0055] The internal thread 105 of the upper cover inner liner 102 is screwed and fixed to the external thread portion 203 of the tank shell 201 .

[0056] An upper cover positioning block 103 and an upper cover convex rib 104 are provided on the outer side of the circumference of the upper cover inner liner 102, which can be conveniently engaged and fixed with the upper cover outer shell 101; when replacing, the upper cover inner liner 102 can be replaced by pressing both sides of the upper cover inner liner 102 hard to make the engaging position dislocated and loose.

[0057] A pair of grooves 204 are rotationally symmetrically provided on both sides of the circumference of the external threaded portion 203 of the tank shell 201. The tank body liner 202 is inserted into the groove 204 of the tank shell 201 through a snap joint 207. The tank shell 201 and the tank body liner 202 are fixed by the cooperation of the cross rib 205 and the cross groove. The cross rib 205 structure can fasten the tank shell 201 and the tank body liner 202 longitudinally and transversely at the same time.

[0058] Example 2

[0059] Half of the inner wall of the groove 204 is a smooth arc surface 208 , and the other half is provided with a cross rib 205 .

[0060] The cross convex rib 205 is composed of a vertical convex rib 2051 and a transverse convex rib 2052 that cross each other vertically, and arc chamfers 2053 are arranged at two outer edges of the vertical convex rib 2051 .

[0061] The end of the transverse rib 2052 close to the smooth arc surface 208 gradually and smoothly transitions from a convex state to the smooth arc surface 208 .

[0062] An annular retaining ring 209 extending horizontally outward is provided at the upper end of the tank body 202, a clamping block 206 is provided at the lower outer side of the annular retaining ring 209, a clamping seam 207 is provided between the clamping block 206 and the tank body 202, and when the tank shell 201 and the tank body 202 are fixed, the annular retaining ring 209 is tightly against the upper end of the external threaded portion 203.

[0063] The lower edge of the upper cover inner liner 102 is provided with an annular step 106 extending outward. When the upper cover shell 101 and the upper cover inner liner 102 are fixed, the annular step 106 is tightly against the lower end of the upper cover shell 101. By pressing the annular step 106 from both sides of the upper cover inner liner 102, the upper cover buckle and the upper cover rib 104 can be conveniently dislocated and separated. The other structures are the same as those in Example 1.

[0064] During assembly, the card seam 207 of the tank body liner 202 is inserted into the smooth arc surface 208 of the groove 204 of the tank body shell 201, and the tank body liner 202 is rotated. The end smooth transition section of the transverse rib 2052 close to the smooth arc surface 208 gradually lifts the card block 206, and the card block 206 gradually rotates to the outside of the cross rib 205 until the cross rib 205 is engaged with the cross groove, completing the assembly of the tank body 2. Half of the inner wall of the groove 204 is a smooth arc surface 208, and the other half is provided with a cross rib 205, and the end of the transverse rib 2052 is a smooth transition shape, which can be easily assembled by rotation, and there is no need to pull the card block 206 outward.

[0065] In addition, arc chamfers 2053 are provided at two edges outside the vertical convex rib 2051. When the vertical convex rib 2051 is disassembled and replaced by rotating in the opposite direction, the vertical convex rib 2051 can slide out of the cross groove through the edge of the arc chamfer 2053, which is convenient for rotation and replacement. The existing ordinary buckle structure is not convenient for installation and disassembly. The rotation installation method of this structure is more convenient. Under the condition of ensuring the fastening strength requirement, setting a suitable chamfer radius also has a good fastening effect.

[0066] Example 3

[0067] Two horizontal upper cover ribs 104 are symmetrically arranged on the outer circumference of the upper cover inner shell 102, and the upper and lower edges of the upper cover ribs 104 are also provided with arc chamfers. A pair of upper cover buckles cooperating with the upper cover ribs 104 are arranged on the inner circumference wall of the upper cover shell 101. Other structures are the same as those in Example 1.

[0068] The two horizontal upper cover ribs 104 can be fixed from both sides, making it more stable. The upper cover ribs 104 are provided with arc chamfers, and a suitable chamfer radius is set under the condition of ensuring the fastening strength requirements, making installation and disassembly more convenient.

[0069] The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A PETG replaceable environmentally friendly combination can, comprising an upper cover and a can body with an upper opening, wherein the upper cover is The upper cover shell and the upper cover liner fixed in the upper cover shell are composed of the tank body shell and the tank body liner fixed in the tank body shell, and the characteristics are: The outer side of the circumference of the upper cover inner shell is provided with an upper cover positioning block and an upper cover convex rib, the inner side of the upper cover inner shell is provided with an internal thread, the inner wall of the circumference of the upper cover shell is provided with an upper cover positioning groove matched with the upper cover positioning block, and an upper cover buckle matched with the upper cover convex rib, the upper cover positioning block of the upper cover inner shell is inserted into the upper cover positioning groove, and the upper cover buckle of the upper cover shell is clamped under the upper cover convex rib; the tank body shell is provided with an external threaded portion, a pair of grooves are rotationally symmetrically provided on both sides of the circumference of the external threaded portion, and a raised cross convex rib is provided on the inner wall of the groove, a pair of clamping blocks corresponding to the grooves are provided on the outer side of the upper port of the tank body, a clamping seam is provided between the clamping block and the tank body, and a cross groove matched with the cross convex rib is provided on the inner side wall of the clamping block, the tank body shell is inserted into the groove of the tank body shell through the clamping seam, the tank body shell and the tank body shell are fixed by the cross convex rib and the cross groove, and the upper cover inner shell is screwed and fixed to the external threaded portion of the tank shell through the internal thread; Half of the inner wall of the groove is a smooth arc surface, and the other half is provided with cross convex ribs; The cross ribs are formed by vertical ribs and transverse ribs intersecting each other vertically, and arc chamfers are arranged at two outer edges of the vertical ribs; The end of the transverse convex rib close to the smooth arc surface gradually and smoothly transitions from a convex state to a smooth arc surface; The upper port of the tank body is provided with an annular retaining ring extending horizontally outward, a clamping block is provided below the outer side of the annular retaining ring, and a clamping seam is provided between the clamping block and the tank body. When the tank shell and the tank body are fixed, the annular retaining ring is tightly against the upper end of the external threaded part; Two horizontal upper cover convex ribs are symmetrically arranged on the outer side of the circumference of the upper cover inner shell, and a pair of upper cover buckles cooperating with the upper cover convex ribs are arranged on the inner wall of the circumference of the upper cover outer shell; The lower edge of the upper cover inner shell is provided with an annular step extending outwards. When the upper cover outer shell is fixed to the upper cover inner shell, the annular step is tightly against the lower port of the upper cover outer shell.

2. A production process for a PETG replaceable environmentally friendly combination can, characterized in that: The following steps are involved: (1) Production of cover liner and tank liner The PP plastic particles are dried in a drying hopper at 50°C and then fed into the corresponding injection molding machine. The mold temperature controller 12S circulates and cools the injection molding machine mold to produce the upper cover liner and the tank liner respectively; (2) Production of upper cover shell and tank shell After the PETG plastic particles are fed into the corresponding injection molding machine, a screw mixer is used to heat the mixture at 230-250℃. The mixture is fully mixed and melted and molded to produce the upper cover shell and the tank body shell respectively; (3) Assembly of the upper cover and tank body Insert the upper cover liner into the upper cover shell, insert the upper cover positioning block into the upper cover positioning groove, and snap the upper cover into place. Below the upper cover rib, complete the upper cover assembly; Insert the card seam of the tank liner into the groove of the tank shell, and the cross groove of the tank liner and the cross convex The ribs cooperate with each other to complete the tank assembly; The inner thread of the upper cover inner shell is screwed and fixed together with the outer thread of the tank body outer shell.

3. The production process of a PETG replaceable environmentally friendly combination can according to claim 2, characterized in that: The injection molding process in step (1) is carried out under the conditions of a medium pressure of 100 MPa and a medium speed of 65 mm / s.

4. The production process of a PETG replaceable environmentally friendly combination can according to claim 3, characterized in that: The injection molding process in step (2) is carried out under the conditions of a medium pressure of 150 MPa and a medium speed of 30 mm / s.

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