CN114179312A - Resin tableware subjected to pattern etching treatment and injection mold - Google Patents
Resin tableware subjected to pattern etching treatment and injection mold Download PDFInfo
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- CN114179312A CN114179312A CN202111574368.5A CN202111574368A CN114179312A CN 114179312 A CN114179312 A CN 114179312A CN 202111574368 A CN202111574368 A CN 202111574368A CN 114179312 A CN114179312 A CN 114179312A
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- 229920005989 resin Polymers 0.000 title claims abstract description 79
- 239000011347 resin Substances 0.000 title claims abstract description 79
- 238000005530 etching Methods 0.000 title claims abstract description 16
- 238000002347 injection Methods 0.000 title claims description 28
- 239000007924 injection Substances 0.000 title claims description 28
- 238000001746 injection moulding Methods 0.000 claims abstract description 11
- -1 polypropylene Polymers 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 239000011112 polyethylene naphthalate Substances 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 9
- 239000005428 food component Substances 0.000 description 7
- 235000012041 food component Nutrition 0.000 description 7
- 239000000306 component Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 239000000155 melt Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 3
- 238000006748 scratching Methods 0.000 description 3
- 230000002393 scratching effect Effects 0.000 description 3
- 238000000576 coating method Methods 0.000 description 2
- 239000005871 repellent Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 206010013642 Drooling Diseases 0.000 description 1
- 208000008630 Sialorrhea Diseases 0.000 description 1
- 206010042496 Sunburn Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/263—Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a resin tableware subjected to grain etching treatment, and relates to the technical field of tableware. The resin tableware having at least an inner surface textured is a preferred embodiment of the present invention, and the resin tableware having a surface textured by injection molding using a mold having a textured surface is also a preferred embodiment of the present invention. The scratch resistance of the surface of the resin tableware of the present invention is improved while retaining the advantages of the resin tableware which is light in weight and not easily broken, and a uniform shape and a balanced quality can be obtained at a low cost.
Description
Technical Field
The present invention relates to a resin tableware having a surface subjected to a texturing treatment, and more particularly to a resin tableware having a surface subjected to a texturing treatment and improved in scratch resistance and an injection mold.
Background
Resin tableware is often used in large-scale catering facilities such as schools, hospitals, and staff restaurants of enterprises. This is mainly because the resin tableware is light in weight, is not easily broken, and can be obtained in a uniform shape and uniform quality at low cost.
The resin tableware is mechanically cleaned, sterilized, dried and then stored after use. Since this series of steps is performed at a relatively high temperature, it is necessary to select a heat-resistant resin as a material of tableware, and since there is not a small chance of contact with water, it is also necessary to make tableware water-repellent, and a material having a good water-repellent property is selected.
However, since the surface of the resin tableware is easily scratched, when the resin tableware is washed, dried, stored or carried, the contact between the inner surface and the outer surface easily causes fine scratches on the surface of the tableware. Therefore, the tableware is stained due to the scratches or food components penetrate into the scratches, so that the stains are particularly noticeable. In particular, when stains on the inner surface of tableware are visually recognized, the aesthetic feeling and sanitary feeling of the tableware are visually impaired.
Therefore, there is also a method of improving the scratch resistance of the surface of resin tableware by applying a coating layer on the surface of resin with a coating agent. However, in restaurant facilities such as school cafeterias, after the tableware is washed with an alkaline detergent at 40 to 80 ℃, the tableware is dried at a high temperature in a high-temperature sterilizing cabinet at 80 ℃ or higher, and the coating used at present has difficulty in obtaining sufficient bonding strength to withstand such a severe use environment, and thus the scratch resistance of the tableware cannot be improved by the coating.
Based on the problems, resin tableware and an injection mold after texture etching treatment are designed to solve the problems.
Disclosure of Invention
The invention provides a resin tableware, which has improved surface scratch resistance, retains the advantages of light-weight and non-breakable resin tableware, and can obtain uniform shape and balanced quality at low cost. The invention provides a resin tableware with a surface subjected to texture etching treatment and an injection mold.
In a first aspect, the invention discloses a resin tableware after texture etching treatment, which adopts the following technical scheme:
the resin tableware after being corrugated is corrugated to form corrugated resin tableware.
The present invention is further configured such that at least the inner surface of the resin tableware is subjected to texturing.
The invention is further arranged that the texture is more than 30% of the inner surface area of the resin tableware.
The invention is further arranged that the height of the relief of the texture is 15-20 μm.
The invention is further arranged to use an injection mould for texturing the surface of the resin tableware, the resin tableware being obtained by injection moulding.
The present invention is further configured such that the resin is at least one selected from the group consisting of polypropylene, polycarbonate, and polyethylene naphthalate.
In a second aspect, the invention discloses an injection mold for resin tableware, which adopts the following technical scheme:
an injection mold for resin tableware, comprising:
the fixed die assembly comprises a fixed die plate and a die core which are sequentially arranged from bottom to top, the die core is arranged at the top of the fixed die plate, and the die core is subjected to etching treatment;
the movable mould component comprises a movable mould plate, a base plate and a core plate which are sequentially arranged from top to bottom, the base plate is arranged between the movable mould plate and the core plate, and the mould core and the core plate form a mould cavity for injection moulding of tableware;
the fixed die assembly and the movable die assembly are arranged on the supporting frame;
the pushing assembly is arranged on the supporting frame and can push the fixed die assembly out of the lower part of the movable die assembly;
and the ejection assembly is arranged on the fixed die assembly, and can eject the tableware on the die core upwards to be separated from the die core.
The pushing assembly comprises a sliding table, a sliding plate and a pushing piece, the sliding table is arranged on the supporting frame, the sliding plate is arranged on the sliding table in a sliding mode, the fixed die plate is arranged at the top of the sliding table, the pushing piece is arranged on the supporting frame, and the pushing piece drives the sliding plate to slide on the sliding table.
The ejection assembly comprises an ejection block, a connecting rod, a spring and a driving piece, wherein the ejection block is embedded on the mold core, the top of the ejection block is flush with the surface of the mold core, the ejection block is in sliding fit with the mold core along the vertical direction, the connecting rod is vertically fixed at the bottom of the ejection block, the connecting rod penetrates through the mold core and the fixed mold plate, a limiting part is formed at the end part of the connecting rod, the spring is sleeved on the connecting rod, two ends of the spring are respectively abutted against the fixed mold plate and the positioning part on the connecting rod, and after the fixed mold assembly is pushed out from the lower part of the movable mold assembly to a designated position, the driving piece drives the end part of the connecting rod to move upwards to drive the ejection block to eject tableware.
The invention is further arranged in that the driving part comprises a first wedge-shaped block and a second wedge-shaped block, the first wedge-shaped block is fixed at the bottom of the connecting rod, the second wedge-shaped block is fixed on the sliding table, and after the fixed die assembly is driven to move out from the lower part of the driven die assembly, the wedge surfaces of the first wedge-shaped block and the second wedge-shaped block are mutually matched to drive the connecting rod to move upwards.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a resin tableware, which has improved surface scratch resistance, retains the advantages of light-weight and non-breakable resin tableware, and can obtain uniform shape and balanced quality at low cost.
Since at least the inner surface of the resin tableware is subjected to texturing, the inner surface is hardly scratched even when the tableware comes into contact with each other, and there is hardly a problem that stains are generated by scratching the inner surface of the tableware or food components penetrate into the scratches to generate stains.
The injection mold provided by the invention is convenient for processing and producing tableware, after mold separation is finished, the fixed mold assembly is moved out from the lower part of the driven mold assembly, the ejection work of the tableware is automatically finished, and the injection-molded tableware can be conveniently taken down from the mold.
Drawings
FIG. 1 is a perspective view of a bowl-shaped resin tableware having an inner surface subjected to texturing;
FIG. 2 is a partial cross-sectional view of the resinous urinal cover of FIG. 1;
FIG. 3 is a schematic structural view of an injection mold;
FIG. 4 is a side view of an injection mold;
FIG. 5 is a schematic structural view of a fixed mold assembly, a pushing assembly and an ejection assembly in an injection mold;
FIG. 6 is a side view of a stationary mold assembly, a pushing assembly and an ejection assembly of the injection mold;
fig. 7 is a schematic cross-sectional view taken along the plane a-a in fig. 6.
Reference numerals:
1. bowl-shaped resin tableware; 2. the inner surface of the tableware; 3. a stationary die assembly; 31. fixing a template; 32. a mold core; 4. a movable die assembly; 41. moving the template; 42. a base plate; 43. a core plate; 44. a positioning column; 5. a support frame; 51. a first support plate; 52. a second support plate; 53. a support pillar; 6. a pushing assembly; 61. a sliding table; 62. a slide plate; 63. a pusher member; 7. ejecting the assembly; 71. a top block; 72. a connecting rod; 73. a spring; 74. a drive member; 741. a first wedge block; 742. a second wedge block; 8. a drive assembly; 81. a movable plate; 82. a first cylinder; 83. and (6) a guide pillar.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The invention discloses a resin tableware after texture etching treatment.
As shown in fig. 1 and 2, the resin tableware is subjected to a graining treatment, so that the scratch resistance of the surface of the tableware is improved while retaining the advantages of the resin tableware which is light in weight and not easily broken, and a uniform shape and uniform quality can be obtained at low cost.
In resin tableware, it is preferable to perform a texturing treatment on at least the inner surface of the tableware from the viewpoint of reducing the possibility that the tableware will be scratched on the inner surface due to contact with each other, and stains will be generated by scratches or food components will penetrate into the scratches.
In the present invention, the term "texturing" means that a plurality of fine irregularities are formed on the surface of an object. The texture of the present invention also includes irregularities called dermatoglyphs and pearskins. Among the unevenness, the unevenness on which a smooth curve is drawn is a more preferable embodiment of the satin of the present invention.
The resin tableware of the present invention is a container for containing food cooked at ordinary times and serving, and the shape thereof is not particularly limited as long as it is an article for the purpose, and may be bowl-shaped, butterfly-shaped, or other shapes.
In a preferred embodiment of the resin tableware according to the present invention, at least the inner surface is subjected to texturing. In this case, the texturing may be performed only on 30% or more of the inner surface area, or may be performed on the entire inner surface. For the purpose of improving the scratch resistance of the surface, it is preferable to subject almost the entire inner surface to a texturing treatment.
In the case of texturing a part of the inner surface of the resin tableware, the effect is more excellent with the bottom of the tableware as the center. The reason for this is that, when the dishes are stacked, the inner surface of the bottom of the dish frequently contacts the bottom of the dish above, and the bottom of the dish is easily scratched.
In the present invention, the texturing is to form a plurality of fine irregularities on the surface of the object. However, since the fine irregularities form stains due to the food component remaining between the irregularities, it is preferable to adjust the sunburn pattern to a level that does not cause the food component remaining. Here, the shading can be adjusted by changing the density, size, or the like of the unevenness. The height of the irregularities formed by the texturing may be appropriately selected, and a preferable effect can be obtained without any particular limitation as long as the height is about 15 to 20 μm.
As a preferred example of the method for texturing the tableware, there is a method of texturing a portion corresponding to a portion to be textured on the tableware on a surface of a mold used in molding the resin tableware. The surface processing of the mold may be performed by forming a plurality of fine irregularities on the surface of the mold by a chemical or physical treatment method, and then performing texturing using the processed surface. Such texturing may be performed by physical processing such as sandblasting or shot blasting, or may be performed by chemical means such as etching which erodes the surface of the article.
The unevenness formed by the texturing may have various shapes in a cross-sectional view, but if a smooth curve is drawn, it is also possible to easily remove tableware contamination caused in use, and thus, this method is a preferred embodiment of the present invention. In order to form such irregularities on the mold on which a smooth curve is drawn, an etching method is preferably used.
As a method for molding the resin tableware, a conventionally known molding method can be used, but an injection molding method is preferably used.
As the resin for producing the resin tableware, a resin used in conventional resin tableware can be selected as appropriate, but a resin suitable for injection molding is more preferable. Examples of preferred resins include polypropylene (PP), Polycarbonate (PC), and polyethylene naphthalate (PEN).
The product is formed by temperature control and pressure control.
The temperature control comprises the molding temperature and the mold temperature, wherein the molding temperature is 210-350 ℃, and the mold temperature is 30-120 ℃. The molding temperature can be set according to the material of the product to be injection-molded, the temperature distribution gradually rises from one side of the hopper, the interval between every two sections is 3-5 ℃, the effect of uniform plasticization is achieved, the injection temperature is 5 ℃ lower than the highest temperature, and the plastic grease is prevented from drooling; the temperature of the die is related to the size of a product according to the crystallinity of a material, the temperature of the die is controlled by adopting a constant temperature medium, the temperature of the die is too low, the crystallinity of the product is low, and post shrinkage and performance reduction can be caused.
The pressure control includes controlling the pressure value to the back pressure at 5-15MPa and controlling the pressure value to the injection pressure at 30-240 MPa. The pressure value of the back pressure is 5-15MPa, so that the melt temperature is uniform, a good plasticizing effect is obtained, and the pressure value of the injection pressure is 30-240MPa, so that the flowing resistance of the material from the charging barrel to the cavity is overcome in the injection molding and mold filling.
In order to make the melt temperature uniform, obtain good plasticizing effect and discharge melt gas, the injection pressure overcomes the flow resistance of the material from the charging barrel to the cavity in the injection mold filling, the mold cavity is filled with the melt, and the melt is compacted, is related to the flow resistance, the filling rate and the melt viscosity, is accurately controlled within the injection pressure range, and can maintain the pressure about half of the injection pressure.
Next, an embodiment of the tableware having an inner surface subjected to the texturing treatment according to the present invention will be described with reference to the drawings. Fig. 1 is a perspective view of an inner surface 2 of a tableware 1 subjected to a texturing treatment. The tableware of fig. 1 is partially shown in cross-section in fig. 2, and the inner surface 2 is a textured surface, and it can be seen that a fine unevenness is formed on the inner surface in the cross-section 3.
The present invention has been made based on a novel finding that when the surface of resin tableware is subjected to texturing, the tableware is hardly scratched even when they are brought into contact with each other, and provides an excellent effect which has been unexpected in the prior art.
The resin tableware of the present invention is a tableware having a surface subjected to a texturing treatment, and has an appearance and a touch different from those of conventional resin tableware. By making full use of the characteristics, products with new added values, such as dark and elegant surface, high-grade feeling and the like, can be manufactured.
The resin tableware of the present invention hardly causes scratches on the inner surface of the tableware even when they are brought into contact with each other, and as a result, stains caused by scratches are hardly caused on the inner surface of the tableware, or stains are hardly caused by food components penetrating into the scratches. Thus, the resin tableware of the present invention is one kind of tableware with improved scratch resistance and capable of being used in large scale catering facilities, such as staff and dining rooms in schools, hospitals and enterprises.
The present invention will be described in further detail with reference to examples, but the present invention is not limited to these examples.
Example 1:
using a mold (Kagaku Co., Ltd.) having a uniform round shape of the contact portion with the entire inner surface of tableware and subjected to Leo-pattern-exposure treatment, a polyethylene naphthalate resin (manufactured by Kitam Kagaku Co., Ltd.) was injection-molded to prepare bowl-shaped tableware having a diameter of 13.6cm and a height of 5.7 cm.
The resulting resin tableware was subjected to a scratch resistance test and a stain resistance test in the following manner. The test results are shown in table 1 below, and it was confirmed that the tableware of the present invention has excellent scratch resistance because no scratch was observed on the inner and outer surfaces in the scratch resistance test. In addition, in the stain resistance test, it was confirmed that the stain resistance was equivalent to that of comparative example 1 in which the etching treatment was not performed.
Scratch resistance
20 dishes were placed in a stainless dish basket fixed to a vibration tester in an upward stacked state, and vibrated 1500000 times at an amplitude of 35mm and a vibration frequency of 7300 times/hour, while the inner and outer surfaces of the dishes were visually observed to confirm the presence or absence of scratches, and the plate was evaluated according to the following criteria.
O: no scratching was observed on both the inner and outer surfaces.
X: scratches were observed on both the inner and outer surfaces
As a result of using a mold which was not subjected to the texturing in example 1, resin tableware was produced in the same manner as in example 1, except that resin tableware which was not subjected to the texturing on the surface was obtained, and the obtained resin tableware was subjected to the abrasion resistance test and the stain resistance test in the same manner as in example 1. Scratch resistance test in the test of example 1, the tableware was placed in the same tableware basket and tested at the same time. The results of the tests are shown in Table 1.
[ Table 1]
Industrial applicability
The invention provides a resin tableware, which has improved surface scratch resistance, retains the advantages of light-weight and non-breakable resin tableware, and can obtain uniform shape and balanced quality at low cost.
According to the present invention, there is provided a resin tableware, wherein at least the inner surface of the resin tableware is textured, so that even if the tableware comes into contact with each other, the inner surface is hardly scratched, and there is hardly a problem that stains are generated by scratching the inner surface of the tableware, or food components penetrate into the scratches to generate stains.
According to the present invention, there is provided tableware which can be used with confidence in large-scale catering facilities such as staff restaurants in schools, hospitals, or enterprises, and which has improved scratch resistance.
The invention also discloses an injection mold for the texture-etched tableware.
As shown in fig. 3 to 7, the injection mold for the texture tableware comprises a fixed mold component 3, a movable mold component 4, a supporting frame 5, a pushing component 6, an ejecting component 7 and a driving component 8.
Wherein, support frame 5 is vertical to be installed on a supporting bench, cover half subassembly 3 is installed in the bottom of support frame 5, and movable mould subassembly 4 is installed at the top of support frame 5, and promotion subassembly 6 is installed in support frame 5 side, and promotion subassembly 6 drive cover half subassembly 3 slides on support frame 5, and ejecting subassembly 7 is installed on cover half subassembly 3, and drive subassembly 8 drive movable mould subassembly 4 up-and-down motion realizes injection mold's the mould that closes and divides, accomplishes the injection moulding of a tableware.
In the present embodiment, the support frame 5 includes a first stay 51, a second stay 52, and a support column 53.
The first supporting plate 51 and the second supporting plate 52 are arranged in the same size, the first supporting plate 51 and the second supporting plate 52 are horizontal, the second supporting plate 52 is arranged right above the first supporting plate 51, and two ends of the supporting column 53 form a detachable fixed connection structure with the first supporting plate 51 and the second supporting plate 52 through bolts.
The fixed die assembly 3 comprises a fixed die plate 31 and a die core 32 which are arranged from bottom to top in sequence.
Specifically, the fixed mold plate 31 is horizontally arranged and mounted on the top of the first support plate 51, the mold core 32 is mounted on the top of the fixed mold plate 31, and the surface of the mold core 32 is subjected to texture etching treatment, so that texture etching appears on the inner surface of the injection-molded tableware.
The movable mold assembly 4 comprises a movable mold plate 41, a backing plate 42, a core plate 43 and a positioning column 44 which are arranged in sequence from top to bottom.
Specifically, in the die assembly process, the positioning column 44 can be inserted into the fixed die plate 31 in a positioning manner, so that the fixed die assembly 3 and the movable die assembly 4 can be stably connected. The mold core 32 cooperates with the core plate 43 to form a mold cavity for injection molding the cutlery.
In this embodiment, the driving assembly 8 includes a moving plate 81, a first cylinder 82, and a guide post 83.
The movable plate 81 is disposed in parallel and directly above the second stay 52. The first air cylinder 82 is vertically arranged, two ends of the first air cylinder 82 are respectively fixedly connected with the movable plate 81 and the second support plate 52 through bolts, the guide pillar 83 is vertically fixed at the top of the second support plate 52, and the guide pillar 83 penetrates through the movable plate 81 and is in sliding fit with the guide sleeve fixed on the movable plate 81.
In the present embodiment, the pushing assembly 6 includes a slide table 61, a slide plate 62, and a pushing member 63.
Specifically, the sliding table 61 is fixed on the top of the first supporting plate 51 through bolts, the sliding table 61 is arranged along the length direction of the fixed die plate 31, the sliding plate 62 is installed on the top of the sliding table 61, the sliding plate 62 is in sliding fit with the sliding table 61 along the length direction of the sliding table 61, the fixed die plate 31 is fixed on the top of the sliding plate 62 through bolts, the pushing member 63 is installed on one side of the first supporting plate 51, and the pushing member 63 drives the sliding plate 62 to slide on the top of the sliding table 61.
The pushing member 63 is a second cylinder, a cylinder body of the second cylinder is fixed at one end of the length of the first supporting plate 51 through a seat body, and the second cylinder is arranged along the length direction of the first supporting plate 51.
In the present embodiment, the ejection assembly 7 includes an ejector block 71, a link 72, a spring 73, and a driving member 74.
The top block 71 is rectangular and embedded at the top of the mold core 32, the top of the top block 71 is flush with the surface of the mold core 32, and the top block 71 is in sliding fit with the mold core 32 along the vertical direction.
The connecting rod 72 is vertically fixed at the bottom of the top block 71 by welding or screwing. The end of the connecting rod 72 facing away from the top block 71 passes through the mold core 32 and the fixed mold plate 31, and the end of the connecting rod 72 is formed with a stopper. The spring 73 is sleeved on the connecting rod 72, and two ends of the spring 73 are respectively abutted against the positioning parts on the fixed die plate 31 and the connecting rod 72.
After the fixed die assembly 3 is pushed out to the designated position from the lower part of the driven die assembly 4, the driving piece 74 drives the connecting rod 72 to move upwards, and drives the jacking block 71 to jack up the tableware.
In particular, the driver 74 includes a first wedge block 741 and a second wedge block 742. The first wedge-shaped block 741 is fixed at the bottom of the connecting rod 72, the second wedge-shaped block 742 is fixed on the sliding table 61, after the fixed die assembly 3 is driven to move out from the lower part of the movable die assembly 4, the wedge surfaces of the first wedge-shaped block 741 and the second wedge-shaped block 742 are matched with each other, the connecting rod 72 is driven to move upwards, the ejection action is automatically completed, and the tableware can be conveniently taken down from the die core 32.
When the fixed mold assembly 3 moves downward of the movable mold assembly 4, the top block 71 is returned by the elastic force of the spring 73.
Accordingly, the drive member 74 may be of an electric or pneumatic ram configuration.
In the present embodiment, the mold cavity formed by the mold core 32 and the core plate 43 is used for injection molding of four bowl-shaped tableware, and each bowl-shaped tableware needs to correspond to one driving member 74, so the first wedge 741 and the second wedge 742 are in four sets of wedge structures, and the four sets of wedge structures are divided into two sets, and the wedge structures are arranged in a highly staggered manner without interference.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A resin tableware subjected to grain etching is characterized in that the surface of the resin tableware is subjected to grain etching to form the grain-etched resin tableware.
2. The grained resin tableware according to claim 1, wherein at least an inner surface of the tableware is grained.
3. The grained resin tableware according to claim 1 or 2, wherein the grain is 30% or more of the inner surface area of the tableware.
4. The grained resin tableware according to claim 3, wherein the height of the grains is 15 to 20 μm.
5. The grained resin tableware according to any one of claims 1 to 4, wherein the resin tableware is obtained by injection molding using an injection mold for graining a surface of the resin tableware.
6. The grained resin tableware according to claim 1, wherein said resin is at least one selected from the group consisting of polypropylene, polycarbonate, and polyethylene naphthalate.
7. An injection mold for resin tableware, comprising:
the fixed die assembly (3) comprises a fixed die plate (31) and a die core (32) which are sequentially arranged from bottom to top, the die core (32) is arranged at the top of the fixed die plate (31), and the die core (32) is subjected to texture etching treatment;
the movable die assembly (4) comprises a movable die plate (41), a backing plate (42) and a core plate (43) which are sequentially arranged from top to bottom, the backing plate (42) is arranged between the movable die plate (41) and the core plate (43), and the die core (32) and the core plate (43) form a die cavity for injection molding of tableware;
the fixed die assembly (3) and the movable die assembly (4) are mounted on the supporting frame (5);
the pushing assembly (6), the pushing assembly (6) is installed on the supporting frame (5), and the fixed die assembly (3) can be pushed out from the lower part of the movable die assembly (4) by the pushing assembly (6);
and the ejection assembly (7), the ejection assembly (7) is installed on the fixed die assembly (3), and the ejection assembly (7) can eject the tableware on the die core (32) upwards to be separated from the die core (32).
8. An injection mold for resin tableware according to claim 7, wherein said pushing assembly (6) comprises a sliding table (61), a sliding plate (62) and a pushing member (63), said sliding table (61) is mounted on said supporting frame (5), said sliding plate (62) is slidably disposed on said sliding table (61), said fixed mold plate (31) is mounted on said top portion, said pushing member (63) is mounted on said supporting frame (5), and said pushing member (63) drives said sliding plate (62) to slide on said sliding table (61).
9. An injection mold for tableware using resin as claimed in claim 8, wherein said ejecting assembly (7) comprises an ejecting block (71), a connecting rod (72), a spring (73) and a driving member (74), said ejecting block (71) is embedded on said mold core (32), the top of said ejecting block (71) is flush with the surface of said mold core (32), said ejecting block (71) is slidably fitted with said mold core (32) along the vertical direction, said connecting rod (72) is vertically fixed on the bottom of said ejecting block (71), said connecting rod (72) passes through said mold core (32) and said fixed mold plate (31), the end of said connecting rod (72) is formed with a positioning portion, said spring (73) is sleeved on said connecting rod (72), two ends of said spring (73) respectively interfere with said positioning portions of said fixed mold plate (31) and said connecting rod (72), after the fixed die assembly (3) is pushed out to a designated position from the lower part of the movable die assembly (4), the driving piece (74) drives the end part of the connecting rod (72) to move upwards, and the ejector block (71) is driven to eject tableware.
10. An injection mold for tableware of resin as claimed in claim 9, wherein said driving member (74) comprises a first wedge block (741) and a second wedge block (742), said first wedge block (741) is fixed to the bottom of said link (72), said second wedge block (742) is fixed to said slide (61), and after said stationary die assembly (3) is driven to move out from under the movable die assembly (4), the wedge faces of said first wedge block (741) and said second wedge block (742) cooperate with each other to drive said link (72) to move upward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111574368.5A CN114179312A (en) | 2021-12-21 | 2021-12-21 | Resin tableware subjected to pattern etching treatment and injection mold |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111574368.5A CN114179312A (en) | 2021-12-21 | 2021-12-21 | Resin tableware subjected to pattern etching treatment and injection mold |
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| CN114179312A true CN114179312A (en) | 2022-03-15 |
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| JPH1119982A (en) * | 1997-07-04 | 1999-01-26 | Meiki Co Ltd | Method for dismounting molding from vertical rubber injection molding machine |
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