Shrinkage bottle with inner bag

Abstract

The utility model discloses an inner bag contraction bottle which comprises an outer bottle body, an inner bag is arranged in the outer bottle body, the opening side of the inner bag is pressed and fixed by a vacuum pump fixed at the position of a bottle opening of the outer bottle body, and the bottom of the outer bottle body is provided with a ventilation gap formed by multi-layer co-extrusion blow molding edge clamping of an inner bag material layer and an outer bottle body material layer which are not mutually fused at the joint. According to the inner bag shrinking bottle, the connecting positions of the inner bag material layer and the outer bottle body material layer are not fused, the ventilation gap can be formed at the bottom of the outer bottle body of the inner bag shrinking bottle through direct blow molding, the vacuum pump for pressing the opening of the inner bag at the bottle opening is matched, and the inner bag can be shrunk by directly pressing the vacuum pump; the inner bag shrinkage bottle can also prevent air from entering the inner bag, reduces the residual quantity of slurry products, and is convenient to process and low in processing cost.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of packing bottle, specifically an inner bag shrinkage bottle. BACKGROUND

[0002] In prior art, the packing bottle for containing liquid or paste product generally only includes a bottle body, the liquid or paste product can be food, cosmetic and the like, the bottle body has a containing cavity, the containing cavity directly fills in liquid product, and the packing is completed by closing the bottle mouth, and the liquid or paste product in the bottle is taken out by opening the bottle mouth.

[0003] However, the liquid or paste product packaged by the above-mentioned way can cause the outside air to enter the bottle body during use, resulting in the oxidation and deterioration of the liquid or paste product due to the contact with the outside air; in addition, the poor flowability of the paste product can cause more residues in the bottle body. Therefore, the packing bottle with the inner bag in the outer bottle body and the one-way valve on the outer bottle body is developed, when the liquid product in the packing bottle is poured out, the inner bag can shrink, and the outside air can enter the gap between the outer bottle body and the inner bag through the one-way valve to avoid the inner bag from expanding and absorbing the air. However, the packing bottle needs to be installed with the one-way valve on the outer bottle body, and the inner bag needs to be filled from the bottle mouth and the air between the inner bag and the outer bottle body needs to be emptied, so that the liquid product can be normally filled, and the processing is relatively inconvenient.

[0004] In order to simplify the processing steps, CN105764798A discloses a layered peeling container and processing method, the layered peeling container is placed on a split mold for blow molding by a melt state layered blank, and the split mold is closed. Then, a blow nozzle is inserted into the opening part on one side of the mouth part of the container body, and air is blown into the mold cavity of the split mold in the closed state, so that the packing container with the inner bag is formed at one time, and then the inner bag is pre-peeled and the one-way valve is installed by punching and processing on the outer bottle body, and then the bottle bottom protruding part is blown with hot air to soften and bend to seal the protruding part. However, the processing method only reduces the step of filling the inner bag, and since the part forming the inner bag and the part forming the outer bottle body are not fused, the split mold splits the layered blank, which can cause the outer bottle body to have a notch, and thus increases the step of sealing the protruding part. Therefore, the processing steps are not actually simplified, and the production efficiency and production cost are still not effectively reduced. SUMMARY

[0005] The utility model discloses a kind of inner bag shrinkage bottles for the technical deficiencies of prior art, and this kind of inner bag shrinkage bottle can also avoid air entering inner bag, reduce the residual amount of paste product, and processing is convenient, and processing cost is low.

[0006] In order to solve the above technical problems, the utility model discloses a kind of inner bag shrink bottles, including outer bottle body, the inner bag is equipped in the outer bottle body, the inner bag opening side is pressed fixed by vacuum pump fixed at the bottle mouth of outer bottle body, the outer bottle body bottom is equipped with by the inner bag material layer and the outer bottle body material layer multilayer co-extrusion blow molding edge formed air gap of mutual non-melting at junction place.This inner bag shrink bottle utilizes inner bag material layer and outer bottle body material layer junction place non-melting, directly blow molding can form air gap in the outer bottle body bottom of inner bag shrink bottle, cooperate the vacuum pump that inner bag opening is pressed in the bottle mouth, directly press vacuum pump can realize inner bag shrink, this inner bag shrink bottle can also avoid air entering inner bag, reduce the residual amount of slurry product, and processing is convenient, and processing cost is low.

[0007] In the above technical scheme, preferably, the inner bag material layer includes the outermost EVOH layer, and the outer bottle body material layer is an HDPE layer or a PP layer.

[0008] In the above technical scheme, preferably, the inner bag material layer is an LDPE layer, a glue layer and an EVOH layer from inside to outside.

[0009] In the above technical scheme, preferably, a flange is formed at the opening of the inner bag to the outside of the bottle mouth of the outer bottle body, and the vacuum pump presses the flange to fix the opening side of the inner bag at the bottle mouth of the outer bottle body.

[0010] In the above technical scheme, preferably, the outer bottle body is threadedly connected with the vacuum pump.

[0011] Compared with the prior art, the utility model has the following beneficial effects: this inner bag shrink bottle utilizes inner bag material layer and outer bottle body material layer junction place non-melting, directly blow molding can form air gap in the outer bottle body bottom of inner bag shrink bottle, cooperate the vacuum pump that inner bag opening is pressed in the bottle mouth, directly press vacuum pump can realize inner bag shrink, this inner bag shrink bottle can also avoid air entering inner bag, reduce the residual amount of slurry product, and processing is convenient, and processing cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the overall structure schematic view of the utility model embodiment.

[0013] Figure 2 It is the sectional structure schematic view of the utility model embodiment.

[0014] Figure 3 It is Figure 2 The local enlarged view of A in the middle.

[0015] Figure 4 It is Figure 2 The local enlarged view of B in the middle.

[0016] Figure 5 For Figure 2 The local enlarged view at C.

[0017] Figure 6 For the cross-sectional structure schematic diagram of the inner bag after shrinkage of the embodiment of the utility model.

[0018] Figure 7 For the processing flow schematic diagram of the embodiment of the utility model.

[0019] Figure 8 For Figure 7 The cross-sectional enlarged view at D. DETAILED DESCRIPTION

[0020] The utility model will be described further in detail in combination with the drawings and specific embodiments: refer to Figures 1 to 8 An inner bag shrinkage bottle, comprising an outer bottle body 1, the inner bag 2 is arranged in the outer bottle body 1, the inner bag 2 opening side is compressed and fixed by vacuum pump 3 fixed at the bottle mouth of outer bottle body 1, the bottom of outer bottle body 1 is provided with the air gap 4 formed by the edge of the multiple layer co-extrusion blow molding of the inner bag material layer 5 and the outer bottle body material layer 6 not fused at the joint.The inner bag shrinkage bottle utilizes the non-fusion of the joint of the inner bag material layer 5 and the outer bottle body material layer 6, and directly blow molding can form the air gap 4 at the bottom of the outer bottle body 1 of the inner bag shrinkage bottle, cooperate the vacuum pump 3 compressed and fixed the opening of the inner bag 2 at the bottle mouth, directly press the vacuum pump 3 can realize the shrinkage of the inner bag 2, the inner bag shrinkage bottle can also avoid the air into the inner bag 2, reduce the residual amount of pulp product, and processing is convenient, and the processing cost is low.

[0021] Compared with the processing method of the traditional inner bag in the bottle body, the processing efficiency of the inner bag shrinkage bottle is higher, compared with the inner bag shrinkage bottle of multiple layer co-extrusion blow molding, the steps of sealing the bottom of the outer bottle body and installing the one-way valve on the outer bottle body are saved, and the structure is more simple.

[0022] In the embodiment, the inner bag material layer 5 includes the outermost EVOH layer 7, and the outer bottle body material layer 6 is the HDPE layer 8.EVOH is a polar polymer, and HDPE is a non-polar polymer, and the fusion of the bright is poor, when processing by multiple layer co-extrusion blow molding, the die edge can be fused around the innermost layer of the inner bag material layer 5, forming a closed cavity, and the outer HDPE will be opened with the blowing of the inner bag, and due to the blocking of the inner bag material layer 5, the air gap 4 will be automatically formed at the bottom edge position.

[0023] Because PP is also not fused with EVOH layer, in other embodiments, the outer bottle body material layer 6 can be PP layer.

[0024] In this embodiment, the inner bag material layer 5 is composed of an LDPE layer 9, a glue layer 10 and an EVOH layer 7 from inside to outside. The LDPE molecular chain contains a large number of long and short branches, and the arrangement between the molecular chains is relatively loose, so it has a low density, soft texture, good transparency, elasticity and flexibility. The LDPE layer 9 can be expanded together with the outer EVOH layer 7 during the expansion process. The EVOH layer 7 plays a role of not being mixed with the outer bottle body material layer 6 during processing, and also has the functions of blocking oxygen and carbon dioxide, so as to avoid the product stored in the inner bag 2 from contacting oxygen and carbon dioxide during use.

[0025] In this embodiment, the opening of the inner bag 2 is formed with a flange 11 outside the bottle mouth of the outer bottle body 1, and the vacuum pump 3 presses the flange 11 to fix the opening side of the inner bag 2 at the bottle mouth of the outer bottle body 1. This structure enables the vacuum pump 3 to conveniently fix the opening side of the inner bag 2 at the bottle mouth of the outer bottle body 1.

[0026] Of course, in other embodiments, the opening side of the inner bag 2 can also be fixed at the bottle mouth of the outer bottle body 1 by other positioning methods, for example, the main body part of the vacuum pump 3 extending into the bottle mouth of the outer bottle body 1 is provided with protrusions extending to the sidewall of the bottle mouth, which extrude and fix the inner bag 2 in the bottle mouth of the outer bottle body 1; or the main body part of the vacuum pump 3 extending into the bottle mouth of the outer bottle body 1 directly extrudes and fixes the inner bag 2 in the bottle mouth of the outer bottle body 1.

[0027] In this embodiment, the outer bottle body 1 is threadedly connected with the vacuum pump 3. This structure facilitates the connection and installation of the vacuum pump 3 with the outer bottle body 1.

[0028] Referring to Figures 7 to 8 The above-mentioned processing method of the inner bag shrinkable bottle includes the following steps: preparing a multi-layer parison by taking materials that are not mixed with each other as the inner bag material layer 5 and the outer bottle body material layer 6, and extruding the inner bag material layer 5 inside the outer bottle body material layer 6 with a die to form a cylindrical multi-layer parison, wherein the inner bag material layer 5 is composed of an LDPE layer 9, a glue layer 10 and an EVOH layer 7 from inside to outside, and the outer bottle body material layer 6 is an HDPE layer 8. In other embodiments, the outer bottle body material layer 6 is changed to a PP layer, which also has basically the same effect.

[0029] Blow molding: close the mold, and the mold clamping edge makes the innermost layer of the inner bag material layer 5 fuse, and then blow molding is performed in the inner bag material layer 5 with a blow molding nozzle. The outer bottle body material layer 6 forms a breathable gap 4 at the bottom of the outer bottle body 1 due to the blocking of the inner bag material layer 5 and the non-mixing of the inner bag material layer 5. The mold is provided with a threaded cavity at the bottle mouth of the molding cavity of the molded outer bottle body, so that the bottle mouth of the outer bottle body 1 directly forms an external thread after blow molding, thereby facilitating the threaded cooperation and installation with the vacuum pump 3.

[0030] Open the mold and cut off the burrs.

[0031] Install the vacuum pump 3: the bottle mouth at the outer bottle body 1 is screwed and matched with the installation of vacuum pump 3, and the vacuum pump 3 will be fixed to the opening side of the inner bag 2 at the bottle mouth of the outer bottle body 1.

[0032] Figure 7 In the middle, the steps from left to right are: preparing a multilayer parison, blow molding, opening the mold, cutting off the burr and installing the vacuum pump.

[0033] When filling, the vacuum pump 3 can be removed for filling. Since the bottom of the inner bag 2 is attached to the outer bottle body 1, the bag opening of the inner bag 2 will not be separated from the bottle opening of the outer bottle body 1, and then the vacuum pump 3 can be reinstalled on the outer bottle body 1.

[0034] The inner bag shrink bottle with the vacuum pump 3 and the multilayer co-extrusion blow molding automatically formed air gap 4 can directly press the vacuum pump 3 to realize the shrinkage of the inner bag 2, which can avoid air entering the inner bag 2, reduce the residual amount of the pulp product, and make the processing more convenient and reduce the processing cost.

[0035] The above is only the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. An inner bag shrink bottle comprising an outer bottle body (1) in which an inner bag (2) is provided, characterized in that: The inner bag (2) opening side is pressed and fixed by a vacuum pump (3) fixed at the bottle mouth of an outer bottle body (1), and the bottom of the outer bottle body (1) is provided with a breathable gap (4) formed by a multi-layer co-extrusion blow molding clamping edge of an inner bag material layer (5) and an outer bottle body material layer (6) not fused with each other at the joint.

2. An inner bag shrink bottle according to claim 1, wherein: The inner bag material layer (5) comprises an outermost EVOH layer (7), and the outer bottle body material layer (6) is an HDPE layer (8) or a PP layer.

3. An inner bag shrink bottle as defined in claim 2, wherein: The inner bag material layer (5) comprises, from inside to outside, an LDPE layer (9), a glue layer (10) and the EVOH layer (7).

4. An inner bag shrink bottle as defined in claim 1, wherein: The opening of the inner bag (2) is formed with a turn-up (11) outside the bottle mouth of the outer bottle body (1), and the vacuum pump (3) presses the turn-up (11) to fix the opening side of the inner bag (2) at the bottle mouth of the outer bottle body (1).

5. An inner bag shrink bottle according to claim 1, wherein: The outer bottle body (1) is screw-connected with the vacuum pump (3).

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